Summary:
This change makes changes to XRay implementation files trigger re-builds
of the unit tests. Prior to this change, the unit tests were not built
and run properly if the implementation files were changed during the
development process. This change forces the dependency on all files in
the XRay include and lib hosted files in compiler-rt.
Caveat is, that new files added to the director(ies) will need a re-run
of CMake to re-generate the fileset.
We think this is an OK compromise, since adding new files may
necessitate editing (or adding) new unit tests. It's also less likely
that we're adding new files without updating the CMake configuration to
include the functionality in the XRay runtime implementation anyway.
Reviewers: pelikan, kpw, nglevin
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D44080
llvm-svn: 326842
Summary:
If not using `-Wl,--gc-sections`, a whole lot of unused `sanitizer_common` code
and related static variables are pulled into the shared library.
Keep the binary size smaller, and its memory footprint smaller as well, by
using the compiler flags `-ffunction-section` & `-fdata-sections` by default,
as well as the linker flags `-Wl,--gc-sections`.
Current experiments show a large discrepency between binary sizes generated
by gcc (big) and clang (small). I am not sure yet how I can make a test that
would encompass both, so it's an outstanding work item.
Reviewers: alekseyshl, flowerhack
Reviewed By: alekseyshl
Subscribers: mgorny, delcypher, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D44121
llvm-svn: 326833
Summary: define RLIMIT_AS constant until it s defined in the future
Patch by: David Carlier
Reviewers: krytarowski, vitalybuka
Reviewed By: vitalybuka
Subscribers: kubamracek, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D44068
llvm-svn: 326768
This is triggering "functions that differ only in their return type
cannot be overloaded" error.
Differential Revision: https://reviews.llvm.org/D44126
llvm-svn: 326759
These operations are now obsolete on NetBSD and will be removed.
No functional change for other OSes.
Sponsored by <The NetBSD Foundation>
llvm-svn: 326663
PT_SET_SIGMASK and PT_GET_SIGMASK will be removed from NetBSD
without backward compat (it shortlived in a development branch).
Sponsored by <The NetBSD Foundation>
llvm-svn: 326657
Summary:
Extract INIT_PTHREAD_ATTR_GET_SCHED from INIT_PTHREAD_ATTR_GET,
as the former is not supported on OpenBSD.
Supported interceptors
getdetachstate, getguardsize, getscope, getstacksize, getgrouplist and getstack
Unsupported
getschedparam, getgroupmembership and getschedpolicy
Patch by David CARLIER
Reviewers: krytarowski, vitalybuka
Reviewed By: vitalybuka
Subscribers: fedor.sergeev, srhines, kubamracek, mgorny, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D44035
llvm-svn: 326653
Summary: Moving from ptr to u64 for GetTid posix implementation.
[FreeBSD] Moving from pthread_self to thr_self more appropriate to get thread ID.
Patch by: David CARLIER
Reviewers: krytarowski, vitalybuka
Reviewed By: vitalybuka
Subscribers: kubamracek, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43998
llvm-svn: 326647
Summary:
On OpenBSD no multi arch support
Enabling only UBsan and disabling Asan.
Patch by: David CARLIER
Reviewers: krytarowski, vitalybuka
Reviewed By: vitalybuka
Subscribers: srhines, mgorny, fedor.sergeev, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D44017
llvm-svn: 326646
Summary:
Enabling the memory sanitizer support for FreeBSD, most of unit tests are compatible.
- Adding fstat and stressor_r interceptors.
- Updating the struct link_map access since most likely the struct Obj_Entry had been updated since.
- Disabling few unit tests until further work is needed (or we can assume it can work in real world code).
Patch by: David CARLIER
Reviewers: vitalybuka, krytarowski
Reviewed By: vitalybuka
Subscribers: eugenis, dim, srhines, emaste, kubamracek, mgorny, fedor.sergeev, hintonda, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43080
llvm-svn: 326644
Programs without any code in them should export the exact same set of
symbols as programs with code, at least on Darwin. This is done to make
text-based API verification possible for certain Darwin frameworks.
llvm-svn: 326351
Summary:
For RISCV32, we must force enable int128 for compiling long double routines using the flag -fforce-enable-int128.
Related clang patch: https://reviews.llvm.org/D43105
Reviewers: asb, kito-cheng, apazos, compnerd, howard.hinnant
Reviewed By: kito-cheng
Subscribers: shiva0217, efriedma, mgorny, hintonda, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43106
llvm-svn: 326346
This is a workarond for the fallout from D42644:
[asan] Intercept std::rethrow_exception indirectly.
Reported problem on NetBSD/amd64:
$ sh ./projects/compiler-rt/test/sanitizer_common/asan-i386-NetBSD/NetBSD/Output/ttyent.cc.script
/usr/lib/i386/libgcc.a(unwind-dw2.o): In function `_Unwind_RaiseException':
unwind-dw2.c:(.text+0x1b41): multiple definition of `_Unwind_RaiseException'
/public/llvm-build/lib/clang/7.0.0/lib/netbsd/libclang_rt.asan-i386.a(asan_interceptors.cc.o):/public/llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc:337: first defined here
clang-7.0: error: linker command failed with exit code 1 (use -v to see invocation)
llvm-svn: 326216
Summary:
Instead of using `AlignedChunkHeaderSize`, introduce a `constexpr` function
`getHeaderSize` in the `Chunk` namespace. Switch `RoundUpTo` to a `constexpr`
as well (so we can use it in `constexpr` declarations). Mark a few variables
in the areas touched as `const`.
Overall this has no functional change, and is mostly to make things a bit more
consistent.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D43772
llvm-svn: 326206
Update min deployment target in some tests so that they don't try
to link against libarclite and don't fail when it's not available.
rdar://problem/29253617
Reviewers: vsk, kubamracek
Reviewed By: vsk
Subscribers: jkorous-apple, cfe-commits
Differential Revision: https://reviews.llvm.org/D43787
llvm-svn: 326143
Summary:
Fixes Bug 32434
See https://bugs.llvm.org/show_bug.cgi?id=32434
Short summary:
std::rethrow_exception does not use __cxa_throw to rethrow the exception, so if
it is called from uninstrumented code, it will leave the stack poisoned. This
can lead to false positives.
Long description:
For functions which don't return normally (e.g. via exceptions), asan needs to
unpoison the entire stack. It is not known before a call to such a function
where execution will continue, some function which don't contain cleanup code
like destructors might be skipped. After stack unwinding, execution might
continue in uninstrumented code.
If the stack has been poisoned before such a function is called, but the stack
is unwound during the unconventional return, then zombie redzones (entries) for
no longer existing stack variables can remain in the shadow memory. Normally,
this is avoided by asan generating a call to asan_handle_no_return before all
functions marked as [[noreturn]]. This asan_handle_no_return unpoisons the
entire stack. Since these [[noreturn]] functions can be called from
uninstrumented code, asan also introduces interceptor functions which call
asan_handle_no_return before running the original [[noreturn]] function;
for example, cxa_throw is intercepted.
If a [[noreturn]] function is called from uninstrumented code (so the stack is
left poisoned) and additionally, execution continues in uninstrumented code, new
stack variables might be introduced and overlap with the stack variables
which have been removed during stack unwinding. Since the redzones are not
cleared nor overwritten by uninstrumented code, they remain but now contain
invalid data.
Now, if the redzones are checked against the new stack variables, false
positive reports can occur. This can happen for example by the uninstrumented
code calling an intercepted function such as memcpy, or an instrumented
function.
Intercepting std::rethrow_exception directly is not easily possible since it
depends on the C++ standard library implementation (e.g. libcxx vs libstdc++)
and the mangled name it produces for this function. As a rather simple
workaround, we're intercepting _Unwind_RaiseException for libstdc++. For
libcxxabi, we can intercept the ABI function __cxa_rethrow_primary_exception.
Patch by Robert Schneider.
Reviewers: kcc, eugenis, alekseyshl, vitalybuka
Reviewed By: vitalybuka
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D42644
llvm-svn: 326132
FindAvailableMemoryRange can currently overwrite existing memory (by restricting the VM below addresses that are already used). This patch adds a check to make sure we don't restrict the VM space too much. We are also now more explicit about why the lookup failed and print out verbose values.
Differential Revision: https://reviews.llvm.org/D43318
llvm-svn: 326106
Summary:
Print current stack on CHECK violation to aid debugging and
match other sanitizers functionality.
Reviewers: eugenis
Subscribers: delcypher, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43692
llvm-svn: 326105
Summary:
Start making the Scudo tests less Linux-y:
- `malloc_usable_size` doesn't exist everywhere, so replace them with
`__sanitizer_get_allocated_size` which we provide;
- move all the `memalign` related tests into `memalign.c` since it's also not
available everywhere.
I also noticed that the `memalign.c` was missing a line in one of the loops.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D43393
llvm-svn: 326100
`ubsan_minimal` makes use of the `_sanitizer::atomic_load` function.
This function uses the `DCHECK` macro which in debug builds will use
the `_sanitizer::CheckFailed` function.
This function is part of `sanitizer_common` but `ubsan_minimal` doesn't
use this so the implementation is missing which leads to link failures
on macOS when trying to link `libclang_rt.ubsan_minimal_osx_dynamic.dylib`.
This is in contrast to the BFD linker on Linux which doesn't seem to care
about the missing symbol.
A basic implementation of `_sanitizer::CheckFailed` has been added to
the `ubsan_minimal` debug build to avoid the link error. The
implementation could definitely be improved but I don't know which
functions can be used in this context so I decided to restrict myself to
functions only being used in `ubsan_minimal` already.
llvm-svn: 326032
Summary:
Interceptors initialization may need to allocate memory. So if we initialize too
early we can crash in non initialized allocator.
Reviewers: pcc, eugenis
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D43669
llvm-svn: 326025
Summary:
The setlocale(3) function reloads the ctype(3) arrays from
external files. This happens behind the scenes in the internals
of libc (citrus library, runes functions etc).
ctype(3) functions like isspace(3) can be provided with two
variations on NetBSD: inlined or via a global symbol in libc:
```
#if defined(_NETBSD_SOURCE) && !defined(_CTYPE_NOINLINE) && \
!defined(__cplusplus)
#include <sys/ctype_inline.h>
#else
#include <sys/ctype_bits.h>
#endif
```
The in-lined versions are de-facto array lookup operations.
```
#define isspace(c) ((int)((_ctype_tab_ + 1)[(c)] & _CTYPE_S))
```
After setting setlocale(3) the ctype(3) arrays (_ctype_tab_,
_toupper_tab_, _tolower_tab_) are reload behind the scenes
and they are required to be marked as initialized.
Set them initialized inside the common setlocale(3) interceptor.
The arrays are of size of 257 elements: 0..255 + 1 (EOF).
This corrects errors on NetBSD/amd64 in applications
prebuilt with MSan.
Sponsored by <The NetBSD Foundation>
Reviewers: vitalybuka, dvyukov, joerg
Reviewed By: vitalybuka
Subscribers: llvm-commits, kubamracek, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D42020
llvm-svn: 326008
Summary:
There are applications out there which allocate more than 1 << 18 large chunks
of memory (those handled by LargeMmapAllocator, aka secondary allocator).
For 64 bits, secondary allocator stores allocated chunks in a growing on
demand region of memory, growing in blocks of 128K, up to 1 << 20 chunks total.
Sanitizer internal allocator's secondary uses fixed size array storing up
to 1 << 15 chunks (down to 256K from 2Mb of memory used for that array).
Nothing is changed for 32 bits, chunks are still stored in the fixed size
array (up to 1 << 15 chunks).
Reviewers: eugenis
Subscribers: kubamracek, delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D43693
llvm-svn: 326007
Reported on a buildbot:
Error in XFAIL list:
couldn't parse text: '| arm || aarch64 || mips'
in expression: 'freebsd | arm || aarch64 || mips'
Add || in the place of |
Fallout from D43382
llvm-svn: 325751
Summary:
The Unix subdirectory mostly allows only on Linux x86_64 but now we can target x86_64 arch in general.
Patch by David CARLIER
Reviewers: krytarowski, dberris, emaste
Reviewed By: krytarowski, dberris, emaste
Subscribers: emaste, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43382
llvm-svn: 325743
This patch changes hwasan inline instrumentation:
Fixes address untagging for shadow address calculation (use 0xFF instead of 0x00 for the top byte).
Emits brk instruction instead of hlt for the kernel and user space.
Use 0x900 instead of 0x100 for brk immediate (0x100 - 0x800 are unavailable in the kernel).
Fixes and adds appropriate tests.
Patch by Andrey Konovalov.
Differential Revision: https://reviews.llvm.org/D43135
llvm-svn: 325711
Summary:
Child thread may finish before pthread_setname_np() and/or
pthread_getname_np() had a chance to run, which causes these functions
to fail with ENOENT (meaning /proc/self/task/[tid]/comm doesn't exist).
Fix by stalling child thread on a mutex.
Reviewers: eugenis
Reviewed By: eugenis
Subscribers: llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43548
llvm-svn: 325703
Summary: No supported oses normally compiled that code (or not for a long time) probably never caught it.
Patch by: David CARLIER
Reviewers: vitalybuka, krytarowski
Reviewed By: vitalybuka
Subscribers: kubamracek, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43502
llvm-svn: 325664
Summary:
forkpty(3) and openpty(3) are part of `-lutil` and we don't intend to reimplement
this system library in sanitizers. Everybody using these functions will need to use
a precompiled library against MSan or other desired sanitizer.
Restrict these functions to Linux-only.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, vitalybuka
Reviewed By: vitalybuka
Subscribers: llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D43490
llvm-svn: 325585
Summary:
Use uniform accessors for Program Pointer,
Stack Pointer and Frame Pointer.
Remove CPU check in UBSan supported platforms
and rely only on the OS type.
This adds NetBSD support in GetPcSpBp() for:
- ARM
- ARM64
- HPPA
- PowerPC/PowerPC64
- SPARC/SPARC64
- MIPS
- DEC Alpha AXP
- DEC VAX
- M68K and M68010
- SH3
- IA64
- OR1K
- RISCV
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, vitalybuka, ro
Reviewed By: vitalybuka
Subscribers: aemerson, jyknight, sdardis, kubamracek, arichardson, llvm-commits, kristof.beyls, fedor.sergeev, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D43021
llvm-svn: 325431
The original change broke a llvm-clang-lld-x86_64-debian setup.
This change will be investigated and reintroduced in future.
Original commit:
"Add Xray instrumentation support to FreeBSD"
https://reviews.llvm.org/D43278
llvm-svn: 325309
It looks like get_bits_for_arch doesn't recognize "arm64" as a 64-bit architecture, and it actually matches the "arm" regexp, which marks it as 32-bit. Let's fix that by matching the 64-bit list first and addin "arm64" into the list.
Differential Revision: https://reviews.llvm.org/D43155
llvm-svn: 325300
NetBSD ships now with netbsd_syscall_hooks.h and requires support
for TSan specific features to be enabled.
This is follow up of:
D42048: Add NetBSD syscall hooks skeleton in sanitizers
Sponsored by <The NetBSD Foundation>
llvm-svn: 325245
Summary:
- Enabling the build.
- Using assembly for the cpuid parts.
- Using thr_self FreeBSD call to get the thread id
Patch by: David CARLIER
Reviewers: dberris, rnk, krytarowski
Reviewed By: dberris, krytarowski
Subscribers: emaste, stevecheckoway, nglevin, srhines, kubamracek, dberris, mgorny, krytarowski, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43278
llvm-svn: 325240
Summary:
Introduce handling of 1200 NetBSD specific ioctl(2) calls.
Over 100 operations are disabled as unavailable or conflicting
with the existing ones (the same operation number).
Add a script that generates the rules to detect ioctls on NetBSD.
The generate_netbsd_ioctls.awk script has been written
in NetBSD awk(1) (patched nawk) and is compatible with gawk.
Generate lib/sanitizer_common/sanitizer_interceptors_ioctl_netbsd.inc
with the awk(1) script.
Update sanitizer_platform_limits_netbsd accordingly to add the needed
definitions.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, vitalybuka, eugenis, dvyukov
Reviewed By: vitalybuka
Subscribers: kubamracek, llvm-commits, mgorny, fedor.sergeev, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D41636
llvm-svn: 325212
Summary:
Implement the skeleton of NetBSD syscall hooks for use with sanitizers.
Add a script that generates the rules to handle syscalls
on NetBSD: generate_netbsd_syscalls.awk. It has been written
in NetBSD awk(1) (patched nawk) and is compatible with gawk.
Generate lib/sanitizer_common/sanitizer_platform_limits_netbsd.h
that is a public header for applications, and included as:
<sanitizer_common/sanitizer_platform_limits_netbsd.h>.
Generate sanitizer_syscalls_netbsd.inc that defines all the
syscall rules for NetBSD. This file is modeled after the Linux
specific file: sanitizer_common_syscalls.inc.
Start recognizing NetBSD syscalls with existing sanitizers:
ASan, ESan, HWASan, TSan, MSan.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, vitalybuka, kcc, dvyukov, eugenis
Reviewed By: vitalybuka
Subscribers: hintonda, kubamracek, mgorny, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D42048
llvm-svn: 325206
Summary:
Pretty straightforward, returning the `WorkingSetSize` of a
`PROCESS_MEMORY_COUNTERS` structure. AFAIU, `GetProcessMemoryInfo` is in
`kernel32.lib` for Windows 7 and above. Support for earlier Windows versions
would require `psapi.lib`, but I don't think those are supported by ASan?
Reviewers: alekseyshl, rnk, vitalybuka
Reviewed By: vitalybuka
Subscribers: vitalybuka, kubamracek, delcypher, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D42822
llvm-svn: 325020
Summary:
- Reland rL324263, this time allowing for a compile-time decision as to whether
or not use the 32-bit division. A single test is using a class map covering
a maximum size greater than 4GB, this can be checked via the template
parameters, and allows SizeClassAllocator64PopulateFreeListOOM to pass;
- `MaxCachedHint` is always called on a class id for which we have already
computed the size, but we still recompute `Size(class_id)`. Change the
prototype of the function to work on sizes instead of class ids. This also
allows us to get rid of the `kBatchClassID` special case. Update the callers
accordingly;
- `InitCache` and `Drain` will start iterating at index 1: index 0 contents are
unused and can safely be left to be 0. Plus we do not pay the cost of going
through an `UNLIKELY` in `MaxCachedHint`, and touching memory that is
otherwise not used;
- `const` some variables in the areas modified;
- Remove an spurious extra line at the end of a file.
Reviewers: alekseyshl, tl0gic, dberris
Reviewed By: alekseyshl, dberris
Subscribers: dberris, kubamracek, delcypher, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43088
llvm-svn: 324906
Currently NanoTime() on Darwin is unimplemented and always returns 0. Looks like there's quite a few things broken because of that (TSan periodic memory flush, ASan allocator releasing pages back to the OS). Let's fix that.
Differential Revision: https://reviews.llvm.org/D40665
llvm-svn: 324847
On Darwin, we currently use forkpty to communicate with the "atos" symbolizer. There are several problems that fork or forkpty has, e.g. that after fork, interceptors are still active and this sometimes causes crashes or hangs. This is especially problematic for TSan, which uses interceptors for OS-provided locks and mutexes, and even Libc functions use those.
This patch replaces forkpty with posix_spawn. Since posix_spawn doesn't fork (at least on Darwin), the interceptors are not a problem. Additionally, this also fixes a latent threading problem with ptsname (it's unsafe to use this function in multithreaded programs). Yet another benefit is that we'll handle post-fork failures (e.g. sandbox disallows "exec") gracefully now.
Differential Revision: https://reviews.llvm.org/D40032
llvm-svn: 324846
textdomain is a part of -lintl on BSDs. In GLIBC it's in libc.
We assume that -lintl will need to be rebuilt with sanitizers
in order to sanitize programs using its features.
This is a proper continuation of D41013.
The original patch has been reverted (adding -lintl).
llvm-svn: 324810
Summary:
Allow for options to be defined at compile time, like is already the case for
other sanitizers, via `SCUDO_DEFAULT_OPTIONS`.
Reviewers: alekseyshl, dberris
Reviewed By: alekseyshl, dberris
Subscribers: kubamracek, delcypher, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D42980
llvm-svn: 324620
gcc resolves `__builtin_c?z` to `__c?zdi2` which leads to infinite
recursion. This problem has been observed for sparc64, mips64 and riscv.
Presumably this happens whenever an arch without dedicated bit counting
instructions is targeted. This patch provides a workaround.
Differential revision: https://reviews.llvm.org/D42902
llvm-svn: 324593
The test expects to see the pattern "load add store" twice
in a row.
However the test contains actually several instances of this pattern.
Currently the first pattern appears in the output twice.
But after LLVM change https://reviews.llvm.org/D42691 some addtional
modification is done and one of another pattern has been hoisted in
function entry block.
As a result we have another order of meeting this pattern.
The test is updated to meet this change.
llvm-svn: 324571
The original libFuzzer Fuchsia port relied on convenience libraries,
but these are not exported as part of Fuchsia sysroot. This change
eliminates the use of these libraries and relies on public API only.
Differential Revision: https://reviews.llvm.org/D42996
llvm-svn: 324454
Summary:
Before Xcode 4.5, undefined weak symbols don't work reliably on Darwin:
https://stackoverflow.com/questions/6009321/weak-symbol-link-on-mac-os-x
Therefore this patch disables their use before Mac OS X 10.9 which is the first version
only supported by Xcode 4.5 and above.
Reviewers: glider, kcc, vitalybuka
Reviewed By: vitalybuka
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D41346
llvm-svn: 324284
Summary:
The 32-bit division breaks SizeClassAllocator64PopulateFreeListOOM which uses
Primary that has a maximum size > 32-bit.
Reviewers: alekseyshl
Subscribers: kubamracek, delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42928
llvm-svn: 324268
Summary:
In `ClassID`, make sure we use an unsigned as based for the `lbits` shift.
The previous code resulted in spurious sign extensions like for x64:
```
add esi, 0FFFFFFFFh
movsxd rcx, esi
and rcx, r15
```
The code with the `U` added is:
```
add esi, 0FFFFFFFFh
and rsi, r15
```
And for `MaxCachedHint`, use a 32-bit division instead of `64-bit`, which is
faster (https://lemire.me/blog/2017/11/16/fast-exact-integer-divisions-using-floating-point-operations/)
and already used in other parts of the code (64-bit `GetChunkIdx`, 32-bit
`GetMetaData` enforce 32-bit divisions)
Not major performance gains by any mean, but they don't hurt.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: kubamracek, delcypher, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D42916
llvm-svn: 324263
Summary:
Here are a few improvements proposed for the local cache:
- `InitCache` always read from `per_class_[1]` in the fast path. This was not
ideal as we are working with `per_class_[class_id]`. The latter offers the
same property we are looking for (eg: `max_count != 0` means initialized),
so we might as well use it and keep our memory accesses local to the same
`per_class_` element. So change `InitCache` to take the current `PerClass`
as an argument. This also makes the fast-path assembly of `Deallocate` a lot
more compact;
- Change the 32-bit `Refill` & `Drain` functions to mimic their 64-bit
counterparts, by passing the current `PerClass` as an argument. This saves
some array computations;
- As far as I can tell, `InitCache` has no place in `Drain`: it's either called
from `Deallocate` which calls `InitCache`, or from the "upper" `Drain` which
checks for `c->count` to be greater than 0 (strictly). So remove it there.
- Move the `stats_` updates to after we are done with the `per_class_` accesses
in an attempt to preserve locality once more;
- Change some `CHECK` to `DCHECK`: I don't think the ones changed belonged in
the fast path and seemed to be overly cautious failsafes;
- Mark some variables as `const`.
The overall result is cleaner more compact fast path generated code, and some
performance gains with Scudo (and likely other Sanitizers).
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: kubamracek, delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42851
llvm-svn: 324257
The "sleep(5)" sometimes times out on our bots, causing the test to fail. Let's use pthread_join.
Differential Revision: https://reviews.llvm.org/D42862
llvm-svn: 324126
Late fix for SVN r. 324034
Add new interceptors: strlcpy(3) and strlcat(3)
There was forgotten an addition of len to the return value.
llvm-svn: 324091
Summary:
Implement `MonotonicNanoTime` using `QueryPerformanceCounter`.
This function is used by Scudo & the 64-bit Primary allocator. Implementing it
now means that the release-to-OS mechanism of the Primary will kick in (it
never did since the function returned 0 always), but `ReleaseMemoryPagesToOS` is
still not currently implemented for Windows.
Performance wise, this adds a syscall & a 64-bit division per call to
`MonotonicNanoTime` so the impact might not be negligible, but I don't think
there is a way around it.
Reviewers: rnk, alekseyshl, amccarth
Reviewed By: alekseyshl, amccarth
Subscribers: amccarth, flowerhack, kubamracek, delcypher, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D42579
llvm-svn: 324011
Summary:
Few changes to the secondary:
- mark `const` variables as such;
- change some `CHECK` to `DCHECK`: I don't feel we need to be as conservative as
we were with out checks, as they are the results of our own computation.
- mark a condition as `UNLIKELY`.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42696
llvm-svn: 323997
Summary:
With the change, one can choose not to report comparison (or subtraction)
of a pointer with nullptr pointer.
Reviewers: kcc, jakubjelinek, alekseyshl
Reviewed By: alekseyshl
Subscribers: kubamracek
Differential Revision: https://reviews.llvm.org/D41479
llvm-svn: 323995
This avoids the warnings when building with LLVM_ENABLE_LIBCXX
which automatically adds -stdlib=libc++ to CMAKE_CXX_FLAGS.
Differential Revision: https://reviews.llvm.org/D42238
llvm-svn: 323969
Summary:
This change expands the amount of registers stashed by the entry and
`__xray_CustomEvent` trampolines.
We've found that since the `__xray_CustomEvent` trampoline calls can show up in
situations where the scratch registers are being used, and since we don't
typically want to affect the code-gen around the disabled
`__xray_customevent(...)` intrinsic calls, that we need to save and restore the
state of even the scratch registers in the handling of these custom events.
Reviewers: pcc, pelikan, dblaikie, eizan, kpw, echristo, chandlerc
Reviewed By: echristo
Subscribers: chandlerc, echristo, hiraditya, davide, dblaikie, llvm-commits
Differential Revision: https://reviews.llvm.org/D40894
llvm-svn: 323940
This change updates the Fuchsia-specific code to use the C++ friendly
duration expressions and flips on the building of
libclang_rt.fuzzer-x86_64.a and similar for Fuchsia. Given that
compiler-rt doesn't build on Fuchsia, test have been run by explicitly
building the library and linking it against
lib/fuzzer/tests/FuzzerUnittest.cpp.
Differential Revision: https://reviews.llvm.org/D42670
llvm-svn: 323828
Summary:
This is in preparation for platforms where `SANITIZER_SUPPORTS_WEAK_HOOKS` is 0.
They require a default implementation.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: delcypher, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D42557
llvm-svn: 323795
Summary:
Turns out sizeof(packed) isn't as strong as we'd hoped. This makes sure
that when we initialize the padding, all 12 bytes will be zero.
Reviewers: dberris, kpw, eizan
Subscribers: delcypher, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D42494
llvm-svn: 323755
There was a failure on a bot:
http://lab.llvm.org:8011/builders/clang-cmake-mipsel/builds/1283
strerror test is indeed flaky. We protect all races by a barrier in other tests
to eliminate flakiness. Do the same here.
No idea why tls_race2.cc failed. Add output at the end of the test
as we do in other tests. Sometimes test process crashes somewhere
in the middle (e.g. during race reporting) and it looks like empty output.
Output at the end of test allows to understand if the process has crashed,
or it has finished but produced no race reports.
Reviewed in https://reviews.llvm.org/D42633
llvm-svn: 323657
`set_target_compile_flags()` ultimately sets COMPILE_FLAGS which is
added to CMAKE_CXX_FLAGS in the compile rule, so passing
CMAKE_CXX_FLAGS causes them to be duplicated.
Differential Revision: https://reviews.llvm.org/D42398
llvm-svn: 323626
This gets rid of a lit warning (input './projects/compiler-rt/test/xray/Unit' contained no tests).
Differential Revision: https://reviews.llvm.org/D42597
llvm-svn: 323613
Clang and llvm already use llvm_setup_rpath(), so this change will
help standarize rpath usage across all projects.
Differential Revision: https://reviews.llvm.org/D42462
llvm-svn: 323606
Summary:
This is a follow-up to D42506.
There are a few of things that bothered me about `scudo_interceptors.cpp`:
- the filename is a misnomer: it intercepts some functions, but the rest (C++)
is actually in `scudo_new_delete.cpp`. I feel like `scudo_malloc.cpp` is more
appropriate (ASan uses the same naming scheme);
- we do not need "full" interceptors, since we are never accessing the
unsanitized version of the functions, we just need the
`extern "C" INTERCEPTOR_ATTRIBUTE` part of it to just call our functions;
- a couple of functions where duplicated while they could just be `ALIAS`'d;
- use the `SANITIZER_INTERCEPT_*` defines to hide the unneeded interceptors;
- use `SIZE_T` instead of `uptr`: while it's the same behind the curtain,
the former is meant for this use case.
In the end there is no functional change on the currently supported platforms
(Linux, Android).
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: mgorny, hintonda, delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42546
llvm-svn: 323464
Summary:
Implement `GetNumberOfCPUs` using `GetNativeSystemInfo`.
The only consummer of this function is Scudo which is not functional on
Windows yet.
Reviewers: rnk, zturner
Reviewed By: zturner
Subscribers: zturner, kubamracek, delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42547
llvm-svn: 323462
Summary:
Currently all platforms are using the `scudo_interceptors.cpp` interceptors.
We might to come up with platform specific interceptors when/if we get Apple &
Windows, but as of now, that allows for Fuchsia to use them.
`scudo_new_delete.cpp` didn't have the `#if SANITIZER_LINUX` so it's good to go.
Reviewers: alekseyshl, flowerhack
Reviewed By: flowerhack
Subscribers: delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42506
llvm-svn: 323386
Summary:
Hooks in the allocation & deallocation paths can be a security risk (see for an
example https://scarybeastsecurity.blogspot.com/2016/11/0day-exploit-advancing-exploitation.html
which used the glibc's __free_hook to complete exploitation).
But some users have expressed a need for them, even if only for tests and
memory benchmarks. So allow for `__sanitizer_malloc_hook` &
`__sanitizer_free_hook` to be called if defined, and gate them behind a global
define `SCUDO_CAN_USE_HOOKS` defaulting to 0.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42430
llvm-svn: 323278
Summary:
Now that ubsan does function interception (for signals), we
need to ensure that ubsan is initialized before any library
constructors are called. Otherwise, if a constructor calls
sigaction, ubsan will intercept in an unitialized state, which
will cause a crash.
This patch is a partial revert of r317757, which removed
preinit arrays for ubsan.
Reviewers: vitalybuka, eugenis, pcc
Subscribers: kubamracek, mgorny, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D42389
llvm-svn: 323249
In more recent Linux kernels with 47 bit VMAs the layout of virtual memory
for powerpc64 changed causing the address sanitizer to not work properly. This
patch fixes up a test case that was found to fail on some newer Fedora
releases that use different address ranges.
ref: https://reviews.llvm.org/D40907
llvm-svn: 323217
Summary:
One test-case uses a wrong operation (should be subtraction).
Second test-case should declare a global variables before a tested one
in order to guarantee we will find a red-zone.
Reviewers: kcc, jakubjelinek, alekseyshl
Reviewed By: alekseyshl
Subscribers: kubamracek
Differential Revision: https://reviews.llvm.org/D41481
llvm-svn: 323162
add_custom_libcxx uses the just built compiler and installs the
built libc++, e.g. for testing, neither of which is desirable in
case of Fuzzer where the libc++ should be built using the host
compiler and it's only linked into the libFuzzer and should never
be installed. This change introduces additional arguments to
add_custom_libcxx to allow parametrizing its behavior.
Differential Revision: https://reviews.llvm.org/D42330
llvm-svn: 323054
add_custom_libcxx uses the just built compiler and installs the
built libc++, e.g. for testing, neither of which is desirable in
case of Fuzzer where the libc++ should be built using the host
compiler and it's only linked into the libFuzzer and should never
be installed. This change introduces additional arguments to
add_custom_libcxx to allow parametrizing its behavior.
Differential Revision: https://reviews.llvm.org/D42330
llvm-svn: 323032
sequentially.
The current implementation of commands in
`test/sanitizer_common/ios_commands/` for iOS devices cannot be executed
in parallel which results in the ASan and TSan tests failing when
executed in parallel by lit which was the default behaviour.
We now force the ASan and TSan tests to be a new parallelism group named
`darwin-ios-device-sanitizer` which allows only one test to be run at a
time. We also emit a warning informing the user that tests are being
run sequentially.
This only applies if the target is an iOS device.
Differential Revision: https://reviews.llvm.org/D42156
llvm-svn: 323026
MemToShadowImpl() maps lower addresses to a memory space out of sanitizers
range. The simplest example is address 0 which is mapped to 0x2000000000
static const uptr kShadowBeg = 0x2400000000ull;
but accessing the address during tsan execution will lead to a segmentation
fault.
This patch expands the range used by the sanitizer and ensures that 1/8 of
the maximum valid address in the virtual address spaces is used for shadow
memory.
Patch by Milos Stojanovic.
Differential Revision: https://reviews.llvm.org/D41777
llvm-svn: 323013
Summary:
We somehow never did it, and it raised no issue until now, when trying to
enable Fuchsia as a supported Scudo platform in the cmake config.
So propagate SANITIZER_COMMON_LINK_FLAGS for now.
Reviewers: alekseyshl, flowerhack
Reviewed By: flowerhack
Subscribers: mgorny, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42314
llvm-svn: 322999
Summary:
While there, unify InMemoryRawLog and InMemoryRawLogWithArg's coding style:
- swap libc's memcpy(3) for sanitizer's internal memcpy
- use basic pointer arithmetics to compute offsets from the first record
entry in the pre-allocated buffer, which is always the appropriate type
for the given function
- lose the local variable references as the TLD.* names fit just as well
Reviewers: eizan, kpw, dberris, dblaikie
Subscribers: #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42289
llvm-svn: 322941
Generalize this handling to a separate toplevel ifdef (since any
windows case should use the same function), instead of indenting
the aarch64 case one step further.
Differential Revision: https://reviews.llvm.org/D42197
llvm-svn: 322928
Summary:
Tests were being run by whole-linking the static library with our test binaries.
But since `-fsanitize=scudo` landed with rL317337, we might as well change how
the tests are compiled to use it.
The only difference will be on Android, where the clang flag links in the
dynamic library instead, but the bots are already pushing
`libclang_rt.*-android.so` to the device there is no additional change needed.
Tested locally, including with a standalone build, and an Android one on a O
device, and it all passes.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42243
llvm-svn: 322882
Summary:
Make common allocator agnostic to failure handling modes and move the
decision up to the particular sanitizer's allocator, where the context
is available (call stack, parameters, return nullptr/crash mode etc.)
It simplifies the common allocator and allows the particular sanitizer's
allocator to generate more specific and detailed error reports (which
will be implemented later).
The behavior is largely the same, except one case, the violation of the
common allocator's check for "size + alignment" overflow is now reportied
as OOM instead of "bad request". It feels like a worthy tradeoff and
"size + alignment" is huge in this case anyway (thus, can be interpreted
as not enough memory to satisfy the request). There's also a Report()
statement added there.
Reviewers: eugenis
Subscribers: kubamracek, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D42198
llvm-svn: 322784
Summary:
A forgotten include in `scudo_allocator.cpp` made the symbol only local :/
Before:
```
nm ./lib/clang/7.0.0/lib/linux/libclang_rt.scudo-i686-android.so | grep rss
00024730 t __scudo_set_rss_limit
```
After:
```
nm ./lib/clang/7.0.0/lib/linux/libclang_rt.scudo-i686-android.so | grep rs
00024760 T __scudo_set_rss_limit
```
And we want `T`!
This include also means that we can get rid of the `extern "C"` in the C++
file, the compiler does fine without it (note that this was already the case
for all the `__sanitizer_*` interface functions.
Reviewers: alekseyshl, eugenis
Reviewed By: eugenis
Subscribers: #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42199
llvm-svn: 322782
Summary:
jemalloc on Android currently uses 2 arenas
(https://android.googlesource.com/platform/external/jemalloc/+/master/Android.bp#64).
Since the Android toolchain absorbs compiler-rt and compiles it as is, we have
to enforce the same limit to somehow stay competitive in terms of memory usage.
The changes could either go in:
- `scudo_platform.h` with a default for Android of 2 (this is the solution
implemented here);
- in `CMakeLists.txt` adding -DSCUDO_SHARED_TSD_POOL_SIZE=2 for Android.
- something else?
I don't have a strong opinion on how to do it, but it has to be done upstream
anyway.
Reviewers: alekseyshl, eugenis
Reviewed By: alekseyshl, eugenis
Subscribers: srhines, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D42194
llvm-svn: 322764
This is needed in case the users of libFuzzer use libc++ in their
code, which the fuzz target (libFuzzer) will be linked against.
When libc++ source is available, we build a private version of it
and link it against libFuzzer which allows using the same static
library against codebases which use both libc++ and libstdc++.
Differential Revision: https://reviews.llvm.org/D37631
llvm-svn: 322755
Summary:
This patch (on top of the previous two (https://reviews.llvm.org/D40898 and
https://reviews.llvm.org/D40899) complete the compiler-rt side of the the Solaris
sanitizer port.
It contains the following sets of changes:
* For the time being, the port is for 32-bit x86 only, so reject the various tests on
x86_64.
* When compiling as C++, <setjmp.h> resp. <iso/setjmp_iso.h> only declares
_setjmp and _longjmp inside namespace std.
* MAP_FILE is a Windows feature. While e.g. Linux <sys/mman.h> provides a
no-op compat define, Solaris does not.
* test/asan/TestCases/Posix/coverage.cc was initially failing like this:
/vol/gcc/src/llvm/llvm/local/projects/compiler-rt/lib/sanitizer_common/scripts/sancov.py: 4 files merged; 2 PCs total
rm: cannot remove '/var/gcc/llvm/local/projects/compiler-rt/test/asan/I386SunOSConfig/TestCases/Posix/Output/coverage': Invalid argument
Further digging revealed that the rm was trying to remove the running test's working
directory which failed as observed. cd'ing out of the dir before let the test pass.
* Two tests needed a declaration of alloca. I've now copied the existing code from
test/asan/TestCases/alloca_constant_size.cc, but it may be more profitable and
maintainable to have a common testsuite header where such code is collected.
* Similarly, Solaris' printf %p format doesn't include the leading 0x.
* In test/asan/TestCases/malloc-no-intercept.c, I had to undef __EXTENSIONS__
(predefined by clang for no apparent reason) to avoid conflicting declarations
for memalign.
* test/ubsan/TestCases/Float/cast-overflow.cpp has different platform dependent
ways to define BYTE_ORDER and friends. Why not just use __BYTE_ORDER__ and
friends as predefined by clang and gcc?
Patch by Rainer Orth.
Reviewers: kcc, alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, kubamracek, mgorny, krytarowski, fedor.sergeev, JDevlieghere, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40900
llvm-svn: 322635
This is needed in case the users of libFuzzer use libc++ in their
code, which the fuzz target (libFuzzer) will be linked against.
When libc++ source is available, we build a private version of it
and link it against libFuzzer which allows using the same static
library against codebases which use both libc++ and libstdc++.
Differential Revision: https://reviews.llvm.org/D37631
llvm-svn: 322604
Summary: -fPIE can not be used when building a shared library.
Reviewers: alekseyshl, peter.smith
Subscribers: kubamracek, llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D42121
llvm-svn: 322588
Currently these files are being installed into a root installation
directory, but this triggers an error when the installation directory
is set to an empty string which is often the case when DESTDIR is
used to control the installation destination.
Differential Revision: https://reviews.llvm.org/D41673
llvm-svn: 322451
Summary:
Some time ago, the sanitizers as of r315899 were imported into gcc mainline. This broke
bootstrap on Darwin 10 and 11, as reported in GCC PR sanitizer/82824
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82824) due to the unconditional use
of VM_MEMORY_OS_ALLOC_ONCE. This was only introduced in Darwin 13/Mac OS X 10.9.
The use of the macro was introduced in r300450.
I couldn't find any statement which Darwin versions are supposed to be supported by
LLVM, but the trivial patch to use the macro only if present allowed the gcc bootstrap
to finish.
So far, I haven't tried building llvm/compiler-rt on Darwin 11. Maybe the patch is
simple enough to go in nonetheless.
Committing on behalf of ro.
Reviewers: glider, fjricci, kcc, kuba, kubamracek, george.karpenkov
Reviewed By: fjricci
Subscribers: #sanitizers, zaks.anna, srhines, dberris, kubamracek, llvm-commits
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D39888
llvm-svn: 322437
Summary: It is not necessary launching the build script with bash.
Reviewers: krytarowski
Reviewed By: krytarowski
Subscribers: llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D42008
llvm-svn: 322422
Summary:
itimerval can contain padding that may be legitimately uninitialized.
On NetBSD there are four integers of type "long, int, long, int", the
int argument stands for __sanitizer_suseconds_t. Compiler adds extra
padding in this layout.
Check every field of struct itimerval separately.
Define __sanitizer_suseconds_t as long on FreeBSD, Linux and SmartOS,
and int on NetBSD. Define __sanitizer_timeval and __sanitizer_itimerval.
Sponsored by <The NetBSD Foundation>
Reviewers: eugenis, joerg, vitalybuka
Reviewed By: vitalybuka
Subscribers: emaste, kubamracek, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D41502
llvm-svn: 322399
Summary:
This is needed for the shared runtime since we are pulling RTUbsan in.
Otherwise some builds might fail with errors such as:
`error: undefined reference to '__dynamic_cast'`
Reviewers: alekseyshl, srhines
Reviewed By: srhines
Subscribers: kongyi, pirama, chh, mgorny, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D41995
llvm-svn: 322389
Summary:
Very basic stack instrumentation using tagged pointers.
Tag for N'th alloca in a function is built as XOR of:
* base tag for the function, which is just some bits of SP (poor
man's random)
* small constant which is a function of N.
Allocas are aligned to 16 bytes. On every ReturnInst allocas are
re-tagged to catch use-after-return.
This implementation has a bunch of issues that will be taken care of
later:
1. lifetime intrinsics referring to tagged pointers are not
recognized in SDAG. This effectively disables stack coloring.
2. Generated code is quite inefficient. There is one extra
instruction at each memory access that adds the base tag to the
untagged alloca address. It would be better to keep tagged SP in a
callee-saved register and address allocas as an offset of that XOR
retag, but that needs better coordination between hwasan
instrumentation pass and prologue/epilogue insertion.
3. Lifetime instrinsics are ignored and use-after-scope is not
implemented. This would be harder to do than in ASan, because we
need to use a differently tagged pointer depending on which
lifetime.start / lifetime.end the current instruction is dominated
/ post-dominated.
Reviewers: kcc, alekseyshl
Subscribers: srhines, kubamracek, javed.absar, hiraditya, llvm-commits
Differential Revision: https://reviews.llvm.org/D41602
llvm-svn: 322324
Currently these files are being installed into a root installation
directory, but this triggers an error when the installation directory
is set to an empty string which is often the case when DESTDIR is
used to control the installation destination.
Differential Revision: https://reviews.llvm.org/D41673
llvm-svn: 322256
Currently these files are being installed into a root installation
directory, but this triggers an error when the installation directory
is set to an empty string which is often the case when DESTDIR is
used to control the installation destination.
Differential Revision: https://reviews.llvm.org/D41673
llvm-svn: 322234
Summary:
Enable the compile-time flag -fsanitize-memory-use-after-dtor by
default. Note that the run-time option MSAN_OPTIONS=poison_in_dtor=1
still needs to be enabled for destructors to be poisoned.
Reviewers: eugenis, vitalybuka, kcc
Reviewed By: eugenis, vitalybuka
Subscribers: cfe-commits, llvm-commits
Differential Revision: https://reviews.llvm.org/D37860
llvm-svn: 322221
Summary:
Avoid flaky test failures by by using a monotonic number sequence of
heap tags.
Does not affect stack tags: the way we generate those guarantees
uniqueness for at least 30-something first allocas in any function,
as well as the UAR tag.
Reviewers: alekseyshl, kcc
Subscribers: llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D41882
llvm-svn: 322214
Currently these files are being installed into a root installation
directory, but this triggers an error when the installation directory
is set to an empty string which is often the case when DESTDIR is
used to control the installation destination.
Differential Revision: https://reviews.llvm.org/D41673
llvm-svn: 322153
As discussed in the mail thread <https://groups.google.com/a/isocpp.org/forum/
#!topic/std-discussion/T64_dW3WKUk> "Calling noexcept function throug non-
noexcept pointer is undefined behavior?", such a call should not be UB.
However, Clang currently warns about it.
This change removes exception specifications from the function types recorded
for -fsanitize=function, both in the functions themselves and at the call sites.
That means that calling a non-noexcept function through a noexcept pointer will
also not be flagged as UB. In the review of this change, that was deemed
acceptable, at least for now. (See the "TODO" in compiler-rt
test/ubsan/TestCases/TypeCheck/Function/function.cpp.)
This is the compiler-rt part of a patch covering both cfe and compiler-rt.
Differential Revision: https://reviews.llvm.org/D40720
llvm-svn: 321860
NDK < 13 & API_LEVEL < 21 do not define struct mmsghdr.
Newer NDK use unified headers and provide this definition for all api
levels.
Since we can not check for the NDK version, check the api level. This
is more strict than absolutely necessary, but it does not really
matter: it is only a sanity check.
llvm-svn: 321817
Summary:
It used to fail on the bots, but I could not repro it locally. So turn it back
on to try and see if it still fails and maybe get to the heart of it.
Reviewers: alekseyshl, flowerhack
Reviewed By: alekseyshl
Subscribers: aemerson, srhines, kristof.beyls, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D41707
llvm-svn: 321812
Summary:
`__scudo_set_rss_limit`'s `LimitMb` should really be a `size_t`. Update
accordingly the prototype. To avoid the `NOLINT` and conform with the other
Sanitizers, use the sanitizers types for the internal definition. This should
have no functional change.
Additionally, capitalize a variable name to follow the LLVM coding standards.
Reviewers: alekseyshl, flowerhack
Reviewed By: alekseyshl
Subscribers: #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D41704
llvm-svn: 321803
We're having some use cases where we have more than 128 (the current maximum) instrumented dynamic libraries loaded into a single process. Let's bump the limit to 1024, and separate the constants.
Differential Revision: https://reviews.llvm.org/D41190
llvm-svn: 321782
Summary: Extend the sendmsg test to cover all recv*.
Reviewers: vitalybuka
Subscribers: llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D41620
llvm-svn: 321774
Summary:
This way new asan_device_setup, which knows about the quirks of
recent releases of Android, can be used with older ASan runtime
library (say, from an NDK release). The library is version locked to
the compiler, and is often hard or impossible to update.
Reviewers: vitalybuka
Subscribers: srhines, kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D41679
llvm-svn: 321677
This macro is only defined after XCode 8, causing build breakage for
build systems with prior versions. Ignore DISPATCH_NOESCAPE if not
defined.
Differential Revision: https://reviews.llvm.org/D41601
llvm-svn: 321543
...when such an operation is done on an object during con-/destruction.
(This adds a test case to compiler-rt/test/ubsan/TestCases/TypeCheck/vptr.cpp
that, unlike the existing test cases there, wants to detect multiple UBSan
warnings in one go. Therefore, that file had to be changed from globally using
-fno-sanitize-recover to individually using halt_on_error only where
appropriate.)
This is the compiler-rt part of a patch covering both cfe and compiler-rt.
Differential Revision: https://reviews.llvm.org/D40295
llvm-svn: 321518
FDRLoggingTest::MultiThreadedCycling uses std::array so we need to
include the right C++ header and not rely on transitive dependencies.
llvm-svn: 321485
As reported in PR35739, rL252927 added the Windows specific chkstk and
chkstk2 sources unconditionally, and since these are assembly without a
NO_EXEC_STACK_DIRECTIVE at the end, automated vulnerability scanners
warned about the objects having an executable stack.
Avoid the problem by only including these files when Windows is
targeted.
Reviewers: compnerd, rnk, martell
Reviewed By: martell
Subscribers: mstorsjo, mgorny, martell, javed.absar, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D41567
llvm-svn: 321431
Summary:
Export aligned new/delete to make dynamic runtimes work again.
Remove all valid new/delete cases from ASan test, there's a test in
common for that.
Reviewers: eugenis
Subscribers: srhines, kubamracek, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D41548
llvm-svn: 321394
r318733 introduced a build failure for native MIPS32 systems for xray due
to the lack of __sync_fetch_and_add / __syn_fetch_and_sub support. This patch
extends the existing support providing atomics so that xray can be
successfully built.
The initial patch was reverted in r321292, as I suspected it may have caused the
buildbot failure. Another patch in the updates the bot fetched caused the test
failures which was reverted.
Reviewers: atanasyan, dberris
Differential Revision: https://reviews.llvm.org/D40385
llvm-svn: 321383
Summary:
This patch, on top of https://reviews.llvm.org/D40898, contains the build system
changes necessary to enable the Solaris/x86 sanitizer port.
The only issue of note is the libclang_rt.sancov_{begin, end} libraries: clang relies on the
linker automatically defining __start_SECNAME and __stop_SECNAME labels for
sections whose names are valid C identifiers. This is a GNU ld extension not present
in the ELF gABI, also implemented by gold and lld, but not by Solaris ld. To work around
this, I automatically link the sancov_{begin,end} libraries into every executable for now.
There seems to be now way to build individual startup objects like crtbegin.o/crtend.o,
so I've followed the lead of libclang_rt.asan-preinit which also contains just a single
object.
Reviewers: kcc, alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, kubamracek, mgorny, fedor.sergeev, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40899
llvm-svn: 321373
Summary:
Providing aligned new/delete implementations to match ASan.
Unlike ASan, MSan and TSan do not perform any additional checks
on overaligned memory, hence no sanitizer specific tests.
Reviewers: eugenis
Subscribers: kubamracek, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D41532
llvm-svn: 321365
The public sanitizer headers are intended to be usable from either
C++ or C, but they declare no-argument functions with the syntax that
is not a proper prototype declaration in C. This goes unnoticed until
someone uses -Wsystem-headers.
Patch By: mcgrathr
Reviewers: phosek, vitalybuka
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D41475
llvm-svn: 321305
r318733 introduced a build failure for native MIPS32 systems for xray due
to the lack of __sync_fetch_and_add / __syn_fetch_and_sub support. This patch
extends the existing support providing atomics so that xray can be
successfully built.
Reviewers: atanasyan, dberris
Differential Revision: https://reviews.llvm.org/D40385
llvm-svn: 321260
Summary: Very similar to AddressSanitizer, with the exception of the error type encoding.
Reviewers: kcc, alekseyshl
Subscribers: cfe-commits, kubamracek, llvm-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D41417
llvm-svn: 321203
There could be a situation when a specific DSO was built with FORTIFY_SOURCE option. In case asan-ed binary link against that DSO,
libasan can't handle the possible memory error because it does not have interceptors for spinrtf_chk, snprintf_chk, vprintf_chk,
vsnprintf_chk, __fprintf_chk functions. Let's interceptors for them.
Patch by Denis Khalikov.
Differential Revision: https://reviews.llvm.org/D40951
llvm-svn: 320990
At least <http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-android/
builds/6013/steps/annotate/logs/stdio> complains about
__ubsan::__ubsan_handle_function_type_mismatch_abort (compiler-rt
lib/ubsan/ubsan_handlers.cc) returning now despite being declared 'noreturn', so
looks like a different approach is needed for the function_type_mismatch check
to be called also in cases that may ultimately succeed.
llvm-svn: 320981
As discussed in the mail thread <https://groups.google.com/a/isocpp.org/forum/
#!topic/std-discussion/T64_dW3WKUk> "Calling noexcept function throug non-
noexcept pointer is undefined behavior?", such a call should not be UB.
However, Clang currently warns about it.
There is no cheap check whether two function type_infos only differ in noexcept,so pass those two type_infos as additional data to the function_type_mismatch
handler (with the optimization of passing a null "static callee type" info when that is already noexcept, so the additional check can be avoided anyway). For
the Itanium ABI (which appears to be the only one that happens to be used on
platforms that support -fsanitize=function, and which appears to only record
noexcept information for pointer-to-function type_infos, not for function
type_infos themselves), we then need to check the mangled names for occurrence
of "Do" representing "noexcept".
This is the compiler-rt part of a patch covering both cfe and compiler-rt.
Differential Revision: https://reviews.llvm.org/D40720
llvm-svn: 320977
Summary:
https://reviews.llvm.org/D41121 broke the FreeBSD build due to that type not
being defined on FreeBSD. As far as I can tell, it is an int, but I do not have
a way to test the change.
Reviewers: alekseyshl, kparzysz
Reviewed By: kparzysz
Subscribers: kparzysz, emaste, kubamracek, krytarowski, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D41325
llvm-svn: 320931
Summary:
Hook on -DKERNEL_USE (which is also used in lib/builtins) to not import
strlen and not rely on write() being implemented with the stderr on fd 2.
With this, the only requirements to use this library are:
- "Good enough" std::atomic<void*> and std::atomic<int>
- abort() being implemented
- ubsan_message(const char*) being implemented
Reviewers: eugenis
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D39791
llvm-svn: 320831
Summary:
This patch adds a new install target `install-compilert-rt-headers`,
that is similar to `install-clang-headers`.
It allows to install the headers without installing all of
compiler-rt.
Reviewers: alekseyshl, beanz
Reviewed By: beanz
Subscribers: smeenai, beanz, mgorny, #sanitizers, kcc, llvm-commits
Differential Revision: https://reviews.llvm.org/D41244
llvm-svn: 320808
Summary:
The initial implementation used an ASan like Chunk class that was deriving from
a Header class. Due to potential races, we ended up working with local copies
of the Header and never using the parent class fields. ScudoChunk was never
constructed but cast, and we were using `this` as the pointer needed for our
computations. This was meh.
So we refactored ScudoChunk to be now a series of static functions within the
namespace `__scudo::Chunk` that take a "user" pointer as first parameter (former
`this`). A compiled binary doesn't really change, but the code is more sensible.
Clang tends to inline all those small function (in -O2), but GCC left a few not
inlined, so we add the `INLINE` keyword to all.
Since we don't have `ScudoChunk` pointers anymore, a few variables were renamed
here and there to introduce a clearer distinction between a user pointer
(usually `Ptr`) and a backend pointer (`BackendPtr`).
Reviewers: alekseyshl, flowerhack
Reviewed By: alekseyshl
Subscribers: #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D41200
llvm-svn: 320745
Summary:
This is the first mostly working version of the Sanitizer port to 32-bit Solaris/x86.
It is currently based on Solaris 11.4 Beta.
This part was initially developed inside libsanitizer in the GCC tree and should apply to
both. Subsequent parts will address changes to clang, the compiler-rt build system
and testsuite.
I'm not yet sure what the right patch granularity is: if it's profitable to split the patch
up, I'd like to get guidance on how to do so.
Most of the changes are probably straightforward with a few exceptions:
* The Solaris syscall interface isn't stable, undocumented and can change within an
OS release. The stable interface is the libc interface, which I'm using here, if possible
using the internal _-prefixed names.
* While the patch primarily target 32-bit x86, I've left a few sparc changes in. They
cannot currently be used with clang due to a backend limitation, but have worked
fine inside the gcc tree.
* Some functions (e.g. largefile versions of functions like open64) only exist in 32-bit
Solaris, so I've introduced a separate SANITIZER_SOLARIS32 to check for that.
The patch (with the subsequent ones to be submitted shortly) was tested
on i386-pc-solaris2.11. Only a few failures remain, some of them analyzed, some
still TBD:
AddressSanitizer-i386-sunos :: TestCases/Posix/concurrent_overflow.cc
AddressSanitizer-i386-sunos :: TestCases/init-order-atexit.cc
AddressSanitizer-i386-sunos :: TestCases/log-path_test.cc
AddressSanitizer-i386-sunos :: TestCases/malloc-no-intercept.c
AddressSanitizer-i386-sunos-dynamic :: TestCases/Posix/concurrent_overflow.cc
AddressSanitizer-i386-sunos-dynamic :: TestCases/Posix/start-deactivated.cc
AddressSanitizer-i386-sunos-dynamic :: TestCases/default_options.cc
AddressSanitizer-i386-sunos-dynamic :: TestCases/init-order-atexit.cc
AddressSanitizer-i386-sunos-dynamic :: TestCases/log-path_test.cc
AddressSanitizer-i386-sunos-dynamic :: TestCases/malloc-no-intercept.c
SanitizerCommon-Unit :: ./Sanitizer-i386-Test/MemoryMappingLayout.DumpListOfModules
SanitizerCommon-Unit :: ./Sanitizer-i386-Test/SanitizerCommon.PthreadDestructorIterations
Maybe this is good enough the get the ball rolling.
Reviewers: kcc, alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, jyknight, kubamracek, krytarowski, fedor.sergeev, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40898
llvm-svn: 320740
This includes a few nice bits of refactoring (e.g splitting out the
exclusive locking code into a common utility).
Hopefully the Windows support is fixed now.
Patch by Rainer Orth!
Differential Revision: https://reviews.llvm.org/D40944
llvm-svn: 320731
This includes a few nice bits of refactoring (e.g splitting out the
exclusive locking code into a common utility).
Patch by Rainer Orth!
Differential Revision: https://reviews.llvm.org/D40944
llvm-svn: 320726
Summary:
Before this change, XRay would conservatively patch sections of the code
one sled at a time. Upon testing/profiling, this turns out to take an
inordinate amount of time and cycles. For an instrumented clang binary,
the cycles spent both in the patching/unpatching routine constituted 4%
of the cycles -- this didn't count the time spent in the kernel while
performing the mprotect calls in quick succession.
With this change, we're coalescing the number of calls to mprotect from
being linear to the number of instrumentation points, to now being a
lower constant when patching all the sleds through `__xray_patch()` or
`__xray_unpatch()`. In the case of calling `__xray_patch_function()` or
`__xray_unpatch_function()` we're now doing an mprotect call once for
all the sleds for that function (reduction of at least 2x calls to
mprotect).
Reviewers: kpw, eizan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D41153
llvm-svn: 320664
Summary:
Changes:
- Don't attempt to intercept GLIBC specific functions like __strtol_internal.
This is required to stop intercepting it as we leak dlerror(3) for dlsym(3)
that cannot manage to find a symbol.
- Correct interception of fstatat(2).
- Don't run a test for fgetgrent_r() that is missing on NetBSD.
- Correct link_map location (offset) in Obj_Entry on x86_64 and i386.
- Stop intercepting getpshared-like functions in pthread(3). This is feature
is not enabled by default on NetBSD as it's unfinished.
- Switch intercepting from UTMP to UTMPX functions.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, vitalybuka, eugenis, kcc
Reviewed By: vitalybuka
Subscribers: llvm-commits, srhines, kubamracek, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D41053
llvm-svn: 320663
This saves ~2 MB of dirty memory footprint. Can be a big deal on mobile devices especially when running multiple processes with ASan.
Differential Revision: https://reviews.llvm.org/D40627
llvm-svn: 320660
MADV_DONTNEED on Linux actually mark the pages as free to be overwritten with zeroes, but on Darwin and BSD, it's just an advisory flag (the OS cannot discard the content). We should use MADV_FREE on Darwin and BSD.
Differential Revision: https://reviews.llvm.org/D40666
llvm-svn: 320659
Summary:
Add dummy call of LLVMFuzzerTestOneInput to afl_driver before it starts
executing on actual inputs. Do this so that first time initialization
performed by LLVMFuzzerTestOneInput is not considered code covered by
a particular input.
Patch By: metzman
Reviewers: kcc, morehouse
Reviewed By: kcc
Subscribers: llvm-commits, Sanitizers
Differential Revision: https://reviews.llvm.org/D41193
llvm-svn: 320643
Summary:
The first and only function to start with allows to set the soft or hard RSS
limit at runtime. Add associated tests.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: mgorny, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D41128
llvm-svn: 320611
Summary:
See D40657 & D40679 for previous versions of this patch & description.
A couple of things were fixed here to have it not break some bots.
Weak symbols can't be used with `SANITIZER_GO` so the previous version was
breakin TsanGo. I set up some additional local tests and those pass now.
I changed the workaround for the glibc vDSO issue: `__progname` is initialized
after the vDSO and is actually public and of known type, unlike
`__vdso_clock_gettime`. This works better, and with all compilers.
The rest is the same.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, kubamracek, krytarowski, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D41121
llvm-svn: 320594
Summary:
getScudoChunk function is implicitly inlined for optimized builds on
clang, but not on gcc. It's a small enough function that it seems
sensible enough to just inline it by default.
Reviewers: cryptoad, alekseyshl
Reviewed By: cryptoad
Differential Revision: https://reviews.llvm.org/D41138
llvm-svn: 320592
This change makes XRay print the log file output only when the verbosity
level is higher than 0. It reduces the log spam in the default case when
we want XRay running silently, except when there are actual
fatal/serious errors.
We also update the documentation to show how to get the information
after the change to the default behaviour.
llvm-svn: 320550
Summary: This brings CPU overhead on bzip2 down from 5.5x to 2x.
Reviewers: kcc, alekseyshl
Subscribers: kubamracek, hiraditya, llvm-commits
Differential Revision: https://reviews.llvm.org/D41137
llvm-svn: 320538
This also slightly refactors the code that's checking the directory
presence which allows eliminating one unnecessary variable.
Differential Revision: https://reviews.llvm.org/D40637
llvm-svn: 320446
Summary:
Redo of D40657, which had the initial discussion. The initial code had to move
into a libcdep file, and things had to be shuffled accordingly.
`NanoTime` is a time sink when checking whether or not to release memory to
the OS. While reducing the amount of calls to said function is in the works,
another solution that was found to be beneficial was to use a timing function
that can leverage the vDSO.
We hit a couple of snags along the way, like the fact that the glibc crashes
when clock_gettime is called from a preinit_array, or the fact that
`__vdso_clock_gettime` is mangled (for security purposes) and can't be used
directly, and also that clock_gettime can be intercepted.
The proposed solution takes care of all this as far as I can tell, and
significantly improve performances and some Scudo load tests with memory
reclaiming enabled.
@mcgrathr: please feel free to follow up on
https://reviews.llvm.org/D40657#940857 here. I posted a reply at
https://reviews.llvm.org/D40657#940974.
Reviewers: alekseyshl, krytarowski, flowerhack, mcgrathr, kubamracek
Reviewed By: alekseyshl, krytarowski
Subscribers: #sanitizers, mcgrathr, srhines, llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D40679
llvm-svn: 320409
Summary:
Include <sys/tls.h> for:
- struct tls_tcb - thread control block structure
- __HAVE___LWP_GETTCB_FAST - __lwp_gettcb_fast() is available
- __HAVE___LWP_GETPRIVATE_FAST - __lwp_getprivate_fast() is available
- __HAVE_TLS_VARIANT_I - TLS Variant I for this architecture
- __HAVE_TLS_VARIANT_II - TLS Variant II for this architecture
Rename ThreadSelfSegbase() to ThreadSelfTlsTcb and switch it
to retrieve in a portable way TCB.
Switch ThreadSelf() to retrieve pthread from struct tcb_tls.
Use dl_iterate_phdr() to find out the size of TLS block of
the main program.
Correct the index of the TLS block of the main program
(dlpi_tls_modid); it's 1, not 2.
New NetBSD code is now CPU (NetBSD port) agnostic.
Stop sharing the same code with FreeBSD.
Sponsored by <The NetBSD Foundation>
Reviewers: dvyukov, joerg, vitalybuka
Reviewed By: vitalybuka
Subscribers: emaste, kubamracek, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40159
llvm-svn: 320234
Summary:
This tests must be linked with -lintl for the gettext(3) features.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, eugenis, vitalybuka
Reviewed By: vitalybuka
Subscribers: llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D41013
llvm-svn: 320226
Summary:
This test uses GNU-specific extension to libc: tdestroy() and as-is is not compatible with NetBSD.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, eugenis, vitalybuka
Reviewed By: vitalybuka
Subscribers: llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D41011
llvm-svn: 320225
Summary:
Reuse the Linux new mapping as it is.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, vitalybuka, eugenis
Reviewed By: vitalybuka
Subscribers: llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D41023
llvm-svn: 320218
Summary:
This patch adds the initial support for Fuchsia.
- LIBFUZZER_FUCHSIA is added as an OS type in FuzzerDefs.h
- Fuchsia is, by design, not POSIX compliant. However, it does use ELF and
supports common POSIX I/O functions. Thus, FuzzerExtFunctions.h and
FuzzerIO.h are implemented by extending the header guards in
FuzzerExtFunctionsWeak.cpp and FuzzerIOPosix.cpp to include
LIBFUZZER_FUCHSIA.
- The platform-specific portions of FuzzerUtil.h are implemented by
FuzzerUtilFuchsia.cpp, which makes use of exception ports, syscalls, and
the launchpad library.
- The experimental equivalence server is not currently supported, so
FuzzerShmem.h is implemented by stub methods in FuzzerShmemFuchsia.cpp.
Any future implementation will likely involve VMOs.
Tested with ASAN/SanCov on Fuchsia/x86-64 with the canonical toy fuzzer.
Patch By: aarongreen
Reviewers: kcc, morehouse, flowerhack, phosek
Reviewed By: kcc, phosek, Eugene.Zelenko
Subscribers: srhines, mgorny, Eugene.Zelenko
Differential Revision: https://reviews.llvm.org/D40974
llvm-svn: 320210
Summary:
It looks like clang was generating somewhat weird assembly with the current
code. `FromPrimary`, even though `const`, was replaced every time with the code
generated for `size <= SizeClassMap::kMaxSize` instead of using a variable or
register, and `FromPrimary` didn't induce `ClassId != 0` for the compiler, so a
dead branch was generated for `getActuallyAllocatedSize(Ptr, ClassId)` since
it's never called for `ClassId = 0` (Secondary backed allocations) [this one
was more wishful thinking on my side than anything else].
I rearranged the code bit so that the generated assembly is less clunky.
Also changed 2 whitespace inconsistencies that were bothering me.
Reviewers: alekseyshl, flowerhack
Reviewed By: flowerhack
Subscribers: llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D40976
llvm-svn: 320160
In more recent Linux kernels with 47 bit VMAs the layout of virtual memory
for powerpc64 changed causing the address sanitizer to not work properly. This
patch adds support for 47 bit VMA kernels for powerpc64 and fixes up test
cases.
https://reviews.llvm.org/D40908
There is an associated patch for trunk.
Tested on several 4.x and 3.x kernel releases.
llvm-svn: 320110
Summary: With 3 Dictionary objects, each containing space of ~16k DictionaryEntry objects, the MutationDispatcher object is fairly memory heavy. On platforms with a lower default stack size, this can cause panics in FuzzerUnittest as those tests stack-allocate the MutationDispatcher. This may be especially problematic for platforms that do not (yet) have a way to programmatically change their stack size, aside from link-time flags. In general, it seems more prudent to use the heap for an object of this size.
Reviewers: kcc, morehouse
Reviewed By: kcc
Differential Revision: https://reviews.llvm.org/D40926
llvm-svn: 319988
Summary:
The NetBSD specific implementation of cxa_atexit() does not
preserve the 2nd argument if dso is equal to NULL.
Changes:
- Split paths of handling intercepted __cxa_atexit() and atexit(3).
This affects all supported Operating Systems.
- Add a local stack-like structure to hold the __cxa_atexit() context.
atexit(3) is documented in the C standard as calling callback from the
earliest to the oldest entry. This path also fixes potential ABI
problem of passing an argument to a function from the atexit(3)
callback mechanism.
- Allow usage of global vars with ctors in interceptors.
This allows to use Vector without automatic cleaning up the structures.
This code has been modeled after TSan implementation for the same functions.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, dvyukov, eugenis, vitalybuka, kcc
Reviewed By: vitalybuka
Subscribers: llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40714
llvm-svn: 319967
Summary:
NetBSD renames symbols for historical and compat reasons.
Add required symbol renames in sanitizer_common_interceptors.inc:
- gettimeofday -> __gettimeofday50
- getrusage -> __getrusage50
- shmctl -> __shmctl50
Additionally handle sigaction symbol mangling.
Rename the function symbol in the file to SIGACTION_SYMNAME and define
it as __sigaction14 for NetBSD and sigaction for !NetBSD. We cannot use
simple renaming with the proprocessor, as there are valid fields named
sigaction and they must be left intact.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, eugenis, vitalybuka, dvyukov
Reviewed By: vitalybuka
Subscribers: kubamracek, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40766
llvm-svn: 319966
Summary:
We want to automatically copy the appropriate mailing list
as well as #sanitizers for review requests to the compiler-rt repository.
For context, see the proposal and discussion here:
http://lists.llvm.org/pipermail/cfe-dev/2017-November/056032.html
Similar to D40179, I set up a new Diffusion repository with callsign
"CRT" for compiler-rt:
https://reviews.llvm.org/source/compiler-rt/
This explicitly updates compiler-rt's .arcconfig to point to the new
CRT repository in Diffusion, which will let us use Herald rules H270
and H271.
Reviewers: krytarowski, joerg, dvyukov, vitalybuka, sammccall
Reviewed By: sammccall
Subscribers: dlj, bkramer, dberris, llvm-commits, sammccall, klimek, #sanitizers
Differential Revision: https://reviews.llvm.org/D40498
llvm-svn: 319954
Summary:
Switching the rest of intercepted allocs to InternalAlloc (well, except
__libc_memalign) when current thread is 'in_symbolizer'. Symbolizer
might (and does) use allocation functions other than malloc/calloc/realloc.
posix_memalign is the one actually used, others switched just in case
(since the failure is obscure and not obvious to diagnose).
Reviewers: dvyukov
Subscribers: llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D40877
llvm-svn: 319929
Summary:
Unlike the rest of the sanitizer code, lib/interception uses native macros like __linux__
to check for specific targets instead of the common ones like SANITIZER_LINUX.
When working on the Solaris port of the sanitizers, the current style was found to not
only be inconsistent, but clumsy to use because the canonical way to check for Solaris
is to check for __sun__ && __svr4__ which is a mouthful.
Therefore, this patch switches to use SANITIZER_* macros instead.
Tested on x86_64-pc-linux-gnu.
Reviewers: kcc, vitalybuka
Reviewed By: vitalybuka
Subscribers: #sanitizers, srhines, krytarowski, llvm-commits, fedor.sergeev
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D39798
llvm-svn: 319906
Summary:
This wasn't noticed: `RoundUpTo` doesn't produce a constant expression, so the
sizes were not constant either. Enforce them to be static const, replace
`RoundUpTo` by its expression. The compiler can now optimize the associated
computations accordingly.
Also looking at the produced assembly, `PageSize` was fetched multiple times
during `Allocate`, so keep a local value of it. As a result it's fetched once
and kept in a register.
Reviewers: alekseyshl, flowerhack
Reviewed By: alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D40862
llvm-svn: 319903
r319165 introduced a change to CMakeLists.txt for xray where the set of supported
architectures for XRay was iterated over, tested if they could be targeted then
passed to add_compiler_rt_object_libraries. However all targets were passed,
rather than the architecture that was just tested. For cases such as MIPS, where
mips and mips64 are supported, cmake would then test if mips64 could be targetted
resulting in an attempt to produce multiple identical logical target names, falling
afowl of CMP0002.
Reviewers: dberris
Differential Revision: https://reviews.llvm.org/D40890
llvm-svn: 319893
Summary:
NetBSD uses indirection symbol for a set of threading functions.
Add alias to handle __libc_thr_keycreate the same way as pthread_key_create.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, dvyukov, eugenis, vitalybuka
Reviewed By: vitalybuka
Subscribers: llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40767
llvm-svn: 319868
Summary:
It was deemed that the salt in the chunk header didn't improve security
significantly (and could actually decrease it). The initial idea was that the
same chunk would different headers on different allocations, allowing for less
predictability. The issue is that gathering the same chunk header with different
salts can give information about the other "secrets" (cookie, pointer), and that
if an attacker leaks a header, they can reuse it anyway for that same chunk
anyway since we don't enforce the salt value.
So we get rid of the salt in the header. This means we also get rid of the
thread local Prng, and that we don't need a global Prng anymore as well. This
makes everything faster.
We reuse those 8 bits to store the `ClassId` of a chunk now (0 for a secondary
based allocation). This way, we get some additional speed gains:
- `ClassId` is computed outside of the locked block;
- `getActuallyAllocatedSize` doesn't need the `GetSizeClass` call;
- same for `deallocatePrimary`;
We add a sanity check at init for this new field (all sanity checks are moved
in their own function, `init` was getting crowded).
Reviewers: alekseyshl, flowerhack
Reviewed By: alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D40796
llvm-svn: 319791
Summary:
This change implements the basic mode filtering similar to what we do in
FDR mode. The implementation is slightly simpler in basic-mode filtering
because we have less details to remember, but the idea is the same. At a
high level, we do the following to decide when to filter function call
records:
- We maintain a per-thread "shadow stack" which keeps track of the
XRay instrumented functions we've encountered in a thread's
execution.
- We push an entry onto the stack when we enter an XRay instrumented
function, and note the CPU, TSC, and type of entry (whether we have
payload or not when entering).
- When we encounter an exit event, we determine whether the function
being exited is the same function we've entered recently, was
executing in the same CPU, and the delta of the recent TSC and the
recorded TSC at the top of the stack is less than the equivalent
amount of microseconds we're configured to ignore -- then we un-wind
the record offset an appropriate number of times (so we can
overwrite the records later).
We also support limiting the stack depth of the recorded functions,
so that we don't arbitrarily write deep function call stacks.
Reviewers: eizan, pelikan, kpw, dblaikie
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D40828
llvm-svn: 319762
Summary:
This change allows for registration of multiple logging implementations
through a central mechanism in XRay, mapping an implementation to a
"mode". Modes are strings that are used as keys to determine which
implementation to install through a single API. This mechanism allows
users to choose which implementation to install either from the
environment variable 'XRAY_OPTIONS' with the `xray_mode=` flag, or
programmatically using the `__xray_select_mode(...)` function.
Here, we introduce two API functions for the XRay logging:
__xray_log_register_mode(Mode, Impl): Associates an XRayLogImpl to a
string Mode. We can only have one implementation associated with a given
Mode.
__xray_log_select_mode(Mode): Finds the associated Impl for Mode and
installs it as if by calling `__xray_set_log_impl(...)`.
Along with these changes, we also deprecate the xray_naive_log and
xray_fdr_log flags and encourage users to instead use the xray_mode
flag.
Reviewers: kpw, dblaikie, eizan, pelikan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D40703
llvm-svn: 319759
Summary:
To be more portable (especially w.r.t. platforms without system()),
commands should be managed programmatically rather than via string
manipulation on the command line. This change introduces
Fuzzer::Command, with methods to manage arguments and flags, set output
options, and execute the command.
Patch By: aarongreen
Reviewers: kcc, morehouse
Reviewed By: kcc, morehouse
Subscribers: llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D40103
llvm-svn: 319680
Summary:
This is an attempt at making `PopulateFreeArray` less obscure, more consistent,
and a tiny bit faster in some circumstances:
- use more consistent variable names, that work both for the user & the metadata
portions of the code; the purpose of the code is mostly the same for both
regions, so it makes sense that the code should be mostly similar as well;
- replace the while sum loops with a single `RoundUpTo`;
- mask most of the metadata computations behind kMetadataSize, allowing some
blocks to be completely optimized out if not use metadata;
- `const` the constant variables;
- add a `LIKELY` as the branch it applies to will almost always be taken.
Reviewers: alekseyshl, flowerhack
Reviewed By: alekseyshl
Subscribers: kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D40754
llvm-svn: 319673
Following patch adds support of all memory origins in
CheckForInvalidPointerPair function. For small difference of pointers,
it's directly done in shadow memory (the limit was set to 2048B).
Then we search for origin of first pointer and verify that the second
one has the same origin. If so, we verify that it points either to a same
variable (in case of stack memory or a global variable), or to a same
heap segment.
Committing on behanf of marxin and jakubjelinek.
Reviewers: alekseyshl, kcc
Subscribers: llvm-commits
Differential revision: https://reviews.llvm.org/D40600
llvm-svn: 319668
Summary:
The low-fat STL-like vector container will be reused in MSan.
It is needed to implement an atexit(3) interceptor on NetBSD/amd64 in MSan.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, dvyukov, eugenis, vitalybuka, kcc
Reviewed By: dvyukov
Subscribers: kubamracek, mgorny, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40726
llvm-svn: 319650
Summary:
As discussed in https://github.com/google/oss-fuzz/issues/933,
it would be really awesome to be able to use ThinLTO for fuzzing.
However, as @kcc has pointed out, it is currently undefined (untested)
whether the sanitizers actually function properly with LLD and/or LTO.
This patch is inspired by the cfi test, which already do test with LTO
(and/or LLD), since LTO is required for CFI to function.
I started with UBSan, because it's cmakelists / lit.* files appeared
to be the cleanest. This patch adds the infrastructure to easily add
LLD and/or LTO sub-variants of the existing lit test configurations.
Also, this patch adds the LLD flavor, that explicitly does use LLD to link.
The check-ubsan does pass on my machine. And to minimize the [initial]
potential buildbot breakage i have put some restrictions on this flavour.
Please review carefully, i have not worked with lit/sanitizer tests before.
The original attempt, r319525 was reverted in r319526 due
to the failures in compiler-rt standalone builds.
Reviewers: eugenis, vitalybuka
Reviewed By: eugenis
Subscribers: #sanitizers, pcc, kubamracek, mgorny, llvm-commits, mehdi_amini, inglorion, kcc
Differential Revision: https://reviews.llvm.org/D39508
llvm-svn: 319575
Per beanz, building compiler-rt standalone is a pretty important use
case, so the comment is very out of date.
Differential Revision: https://reviews.llvm.org/D40740
llvm-svn: 319570
These targets strip during installation, and are required to support
install-distribution-stripped in LLVM (to support a stripped
distribution). LLVM has an add_llvm_install_targets function for this
purpose, but we can't rely on LLVM being present.
Differential Revision: https://reviews.llvm.org/D40687
llvm-svn: 319569
This reverts commit r319525.
This change has introduced a problem with the Lit tests build for compiler-rt using Gold: http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/6047/steps/test%20standalone%20compiler-rt/logs/stdio
llvm-lit: /b/sanitizer-x86_64-linux/build/llvm/utils/lit/lit/TestingConfig.py:101: fatal: unable to parse config file '/b/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/profile/Linux/lit.local.cfg', traceback: Traceback (most recent call last):
File "/b/sanitizer-x86_64-linux/build/llvm/utils/lit/lit/TestingConfig.py", line 88, in load_from_path
exec(compile(data, path, 'exec'), cfg_globals, None)
File "/b/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/profile/Linux/lit.local.cfg", line 37, in <module>
if root.host_os not in ['Linux'] or not is_gold_linker_available():
File "/b/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/profile/Linux/lit.local.cfg", line 27, in is_gold_linker_available
stderr = subprocess.PIPE)
File "/usr/lib/python2.7/subprocess.py", line 390, in __init__
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1024, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory
llvm-svn: 319529
Summary:
As discussed in https://github.com/google/oss-fuzz/issues/933,
it would be really awesome to be able to use ThinLTO for fuzzing.
However, as @kcc has pointed out, it is currently undefined (untested)
whether the sanitizers actually function properly with LLD and/or LTO.
This patch is inspired by the cfi test, which already do test with LTO
(and/or LLD), since LTO is required for CFI to function.
I started with UBSan, because it's cmakelists / lit.* files appeared
to be the cleanest. This patch adds the infrastructure to easily add
LLD and/or LTO sub-variants of the existing lit test configurations.
Also, this patch adds the LLD flavor, that explicitly does use LLD to link.
The check-ubsan does pass on my machine. And to minimize the [initial]
potential buildbot breakage i have put some restrictions on this flavour.
Please review carefully, i have not worked with lit/sanitizer tests before.
Reviewers: eugenis, vitalybuka
Reviewed By: eugenis
Subscribers: #sanitizers, pcc, kubamracek, mgorny, llvm-commits, mehdi_amini, inglorion, kcc
Differential Revision: https://reviews.llvm.org/D39508
llvm-svn: 319525
Now that we have disabled the run-forever tests, and cleaned up the
intel 80-bit float based tests, we should be able to enable testing
compiler-rt for powerpc64.
llvm-svn: 319474
Summary:
Currently sys/cachectl.h is used unconditionally on MIPS although it is
only available on Linux and will fail the build when targeting baremetal
Reviewers: petarj
Reviewed By: petarj
Subscribers: sdardis, krytarowski
Differential Revision: https://reviews.llvm.org/D40659
llvm-svn: 319455
Summary:
In cases where we can't use the .preinit_array section (as in Darwin for
example) we instead use dynamic initialisation. We know that this
alternative approach will race with the initializers of other objects at
global scope, but this is strictly better than nothing.
Reviewers: kubamracek, nglevin
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D40599
llvm-svn: 319366
On macOS, we usually don't require launching the target with DYLD_INSERT_LIBRARIES anymore. However, it is still necessary when running a target that is not instrumented (and e.g. dlopen's an instrument library later). In any case, ASan and TSan currently remove themselves from the DYLD_INSERT_LIBRARIES environment variable to avoid passing it onto children. This works well e.g. when instrumenting a shell. A problem arises when the target is a non-instrumented shim (e.g. "xcrun") that either re-execs or launches a child that is supposed to get DYLD_INSERT_LIBRARIES propagated. To support this mode, this patch introduces 'strip_env' flag that can be used to keep DYLD_INSERT_LIBRARIES untouched.
Differential Revision: https://reviews.llvm.org/D39991
llvm-svn: 319365
Summary:
With this change, we allow someone to chose the `SizeClassMap` they want to use
at compile time via a define.
I feel somewhat unimaginative with the name of the defines, so if someone has a
better idea, let me know. I have been alternating between those and
`SCUDO_USE_xxx_SIZECLASSMAP` which is clearer but also longer. The issue with
those is that it wouldn't be consistent with `SCUDO_TSD_EXCLUSIVE` that should
probably become `SCUDO_USE_EXCLUSIVE_TSD` maybe?
Anyway, naming is hard, and I am not sure what makes more sense!
Reviewers: alekseyshl, flowerhack
Reviewed By: alekseyshl
Subscribers: llvm-commits, srhines
Differential Revision: https://reviews.llvm.org/D40521
llvm-svn: 319350
It looks FindDynamicShadowStart has a bug: When iterating over the memory map, we will not consider the very last gap in the address space. Let's fix that.
Differential Revision: https://reviews.llvm.org/D39989
llvm-svn: 319348
It's explicitly forbidden to call fclose with NULL, but at least on Darwin, this succeeds and doesn't segfault. To maintain binary compatibility, ASan should survice fclose(NULL) as well.
Differential Revision: https://reviews.llvm.org/D40053
llvm-svn: 319347
Calling getpwnam(NULL) is probably a bug, but at least on Darwin, such a call succeeds without segfaulting. I have some existing code that relies on that. To maintain binary compatibility, ASan should also survive a call to getpwnam with NULL.
Differential Revision: https://reviews.llvm.org/D40052
llvm-svn: 319344
This renames ASM_TSAN_SYMBOL and ASM_TSAN_SYMBOL_INTERCEPTOR to just ASM_SYMBOL and ASM_SYMBOL_INTERCEPTOR, because they can be useful in more places than just TSan. Also introduce a CMake function to add ASM sources to a target.
Differential Revision: https://reviews.llvm.org/D40143
llvm-svn: 319339
rL319241 was a bit too aggressive removing sources dependencies. This
restores the actual required dependency for armhf.
Follow-up to D39114.
llvm-svn: 319255
This isolates the per-architecture files from the common files
implementing the XRay facilities. Because of the refactoring done in
D39114, we were including the definition of the sources in the archive
twice, causing link-time failures.
Follow-up to D39114.
llvm-svn: 319241
Summary:
Load process memory map after updating the same cache to reflect the
umap happening in the process of updating.
Also clear out the buffer in case of failed read of /proc/self/maps (not
the source of stale segments, but can lead to the similar crash).
Reviewers: eugenis
Subscribers: llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D40529
llvm-svn: 319237
This is based on discussion in https://reviews.llvm.org/D40376 .
The comments try to explain the reason for the current implementation
and note that it might change in the future, so clients should not
rely on this particular implementation.
Differential Revision: https://reviews.llvm.org/D40565
llvm-svn: 319190
Summary:
This change adds support for the setjmp(3)/longjmp(3)
family of functions on NetBSD.
There are three types of them on NetBSD:
- setjmp(3) / longjmp(3)
- sigsetjmp(3) / sigsetjmp(3)
- _setjmp(3) / _longjmp(3)
Due to historical and compat reasons the symbol
names are mangled:
- setjmp -> __setjmp14
- longjmp -> __longjmp14
- sigsetjmp -> __sigsetjmp14
- siglongjmp -> __siglongjmp14
- _setjmp -> _setjmp
- _longjmp -> _longjmp
This leads to symbol renaming in the existing codebase.
There is no such symbol as __sigsetjmp/__longsetjmp
on NetBSD
Add a comment that GNU-style executable stack
note is not needed on NetBSD. The stack is not
executable without it.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, dvyukov, vitalybuka
Reviewed By: dvyukov
Subscribers: llvm-commits, kubamracek, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40337
llvm-svn: 319189
In more recent Linux kernels with 47 bit VMAs the layout of virtual memory
for powerpc64 changed causing the thread sanitizer to not work properly. This
patch adds support for 47 bit VMA kernels for powerpc64.
(second part)
Tested on several 4.x and 3.x kernel releases.
llvm-svn: 319180
This change is the first in a series of changes to get the XRay runtime
building on macOS. This first allows us to build the minimal parts of
XRay to get us started on supporting macOS development. These include:
- CMake changes to allow targeting x86_64 initially.
- Allowing for building the initialisation routines without
`.preinit_array` support.
- Use __sanitizer::SleepForMillis() to work around the lack of
clock_nanosleep on macOS.
- Deprecate the xray_fdr_log_grace_period_us flag, and introduce
the xray_fdr_log_grace_period_ms flag instead, to use
milliseconds across platforms.
Reviewers: kubamracek
Subscribers: llvm-commits, krytarowski, nglevin, mgorny
Differential Review: https://reviews.llvm.org/D39114
llvm-svn: 319165
The proper index is 6, not 2.
Patch extracted from https://reviews.llvm.org/D40337
Reviewed and accepted by <dvyukov>.
Sponsored by <The NetBSD Foundation>
llvm-svn: 319163
Summary:
NetBSD uses the __sigaction14 symbol name for historical and compat
reasons for the sigaction(2) function name.
Rename the interceptors and users of sigaction to sigaction_symname
and reuse it in the code base.
This change fixes 4 failing tests in TSan/NetBSD:
- ThreadSanitizer-x86_64 :: signal_errno.cc
- ThreadSanitizer-x86_64 :: signal_malloc.cc
- ThreadSanitizer-x86_64 :: signal_sync2.cc
- ThreadSanitizer-x86_64 :: signal_thread.cc
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, vitalybuka, eugenis, dvyukov, kcc
Reviewed By: dvyukov
Subscribers: kubamracek, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40341
llvm-svn: 319160
"offset" declared in a macro may shadow a variable with the same name
in the caller which is used in a macro argument. We are quite lucky
that it does not actually happen, but rename the variable anyway to
be on the safe side.
llvm-svn: 319115
Summary:
Bionic doesn't initialize its globals early enough. This causes issues when
trying to access them from a preinit_array (b/25751302) or from another
constructor called before the libc one (b/68046352). __progname is initialized
after the other globals, so we can check its value to know if calling
`getauxval` is safe.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, llvm-commits
Differential Revision: https://reviews.llvm.org/D40504
llvm-svn: 319099
Summary:
Now that the sanitizer_common interface for MmapNoAccess / MmapFixed
have been refactored to allow a more OO-esque access pattern, update the
Fuchsia mmap implementation to take advantage of this.
Previously MmapNoAccess / MmapFixed relied on a global allocator_vmar,
since the sanitizer_allocator only called MmapNoAccess once. Now, we
create a new VMAR per ReservedAddressRange object.
This allows the sanitizer allocator to work in tandem with the Scudo
secondary allocator.
This is part 4 of a 4 part changeset:
* part 1 https://reviews.llvm.org/D38593
* part 2 https://reviews.llvm.org/D38592
* part 3 https://reviews.llvm.org/D38593
Reviewers: mcgrathr, cryptoad
Reviewed By: cryptoad
Subscribers: alekseyshl, mcgrathr, kubamracek, mehdi_amini
Differential Revision: https://reviews.llvm.org/D38595
llvm-svn: 319083
Summary:
Add atomic verification to ensure that Thread is Joined after marking it
Finished.
It is required for NetBSD in order to prevent Thread Exited/Joined race,
that may occur when native system libpthread(3) cannot be reliably traced
in a way to guarantee that the mentioned events happen one after another.
This change fixes at least TSan and LSan on NetBSD.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, dvyukov, vitalybuka
Reviewed By: dvyukov
Subscribers: llvm-commits, kubamracek, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40294
llvm-svn: 319004
Summary:
Stop using the Linux solution with pthread_key_create(3).
This approach does not work on NetBSD, because calling
the thread destructor is not the latest operation on a POSIX
thread entity.
Detect _lwp_exit(2) call as it is really the latest operation
called from a detaching POSIX thread.
The pthread_key_create(3) solution also cannot be used
in early libc/libpthread initialization on NetBSD as the
system libraries are not bootstrapped enough.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, vitalybuka, kcc, dvyukov
Reviewed By: dvyukov
Subscribers: llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40457
llvm-svn: 318994
Summary:
InitializeSwiftDemangler() attempts to resolve the
swift_demangle symbol. If this is not available, we
observe dlerror message leak.
Caught on NetBSD/amd64 in TSan.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, kubamracek, vitalybuka, dvyukov, eugenis
Reviewed By: dvyukov
Subscribers: llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40382
llvm-svn: 318980
Summary:
This patch aims at condensing the hardware CRC32 feature detection and making
it slightly more effective on Android.
The following changes are included:
- remove the `CPUFeature` enum, and get rid of one level of nesting of
functions: we only used CRC32, so we just implement and use
`hasHardwareCRC32`;
- allow for a weak `getauxval`: the Android toolchain is compiled at API level
14 for Android ARM, meaning no `getauxval` at compile time, yet we will run
on API level 27+ devices. The `/proc/self/auxv` fallback can work but is
worthless for a process like `init` where the proc filesystem doesn't exist
yet. If a weak `getauxval` doesn't exist, then fallback.
- couple of extra corrections.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: kubamracek, aemerson, srhines, kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D40322
llvm-svn: 318859
Summary:
This change allows Fuchsia to boot properly using the Scudo allocator.
A first version of this commit was reverted by rL317834 because it broke Android
builds for toolchains generated with older NDKs. This commit introduces a
fall back to solve that issue.
Reviewers: cryptoad, krytarowski, rnk, alekseyshl
Reviewed By: cryptoad, krytarowski, alekseyshl
Subscribers: llvm-commits, srhines, kubamracek, krytarowski
Differential Revision: https://reviews.llvm.org/D40121
llvm-svn: 318802
Summary:
Android for API level >= 21 has `getauxval`. Enable `SANITIZER_USE_GETAUXVAL`
when those requirements are met. Correct a typo in the header.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D40260
llvm-svn: 318775
Summary:
The pthread_once(3)/NetBSD type is built with the following structure:
struct __pthread_once_st {
pthread_mutex_t pto_mutex;
int pto_done;
};
Set the pto_done position as shifted by __sanitizer::pthread_mutex_t_sz
from the beginning of the pthread_once struct.
This corrects deadlocks when the pthread_once(3) function
is used.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, dvyukov, vitalybuka
Reviewed By: dvyukov
Subscribers: llvm-commits, kubamracek, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40262
llvm-svn: 318742
Summary:
Before this patch, XRay's basic (naive mode) logging would be
initialised and installed in an adhoc manner. This patch ports the
implementation of the basic (naive mode) logging implementation to use
the common XRay framework.
We also make the following changes to reduce the variance between the
usage model of basic mode from FDR (flight data recorder) mode:
- Allow programmatic control of the size of the buffers dedicated to
per-thread records. This removes some hard-coded constants and turns
them into runtime-controllable flags and through an Options
structure.
- Default the `xray_naive_log` option to false. For now, the only way
to start basic mode is to set the environment variable, or set the
default at build-time compiler options. Because of this change we've
had to update a couple of tests relying on basic mode being always
on.
- Removed the reliance on a non-trivially destructible per-thread
resource manager. We use a similar trick done in D39526 to use
pthread_key_create() and pthread_setspecific() to ensure that the
per-thread cleanup handling is performed at thread-exit time.
We also radically simplify the code structure for basic mode, to move
most of the implementation in the `__xray` namespace.
Reviewers: pelikan, eizan, kpw
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D40164
llvm-svn: 318734
Summary:
Before this change, the FDR mode implementation relied on at thread-exit
handling to return buffers back to the (global) buffer queue. This
introduces issues with the initialisation of the thread_local objects
which, even through the use of pthread_setspecific(...) may eventually
call into an allocation function. Similar to previous changes in this
line, we're finding that there is a huge potential for deadlocks when
initialising these thread-locals when the memory allocation
implementation is also xray-instrumented.
In this change, we limit the call to pthread_setspecific(...) to provide
a non-null value to associate to the key created with
pthread_key_create(...). While this doesn't completely eliminate the
potential for the deadlock(s), it does allow us to still clean up at
thread exit when we need to. The change is that we don't need to do more
work when starting and ending a thread's lifetime. We also have a test
to make sure that we actually can safely recycle the buffers in case we
end up re-using the buffer(s) available from the queue on multiple
thread entry/exits.
This change cuts across both LLVM and compiler-rt to allow us to update
both the XRay runtime implementation as well as the library support for
loading these new versions of the FDR mode logging. Version 2 of the FDR
logging implementation makes the following changes:
* Introduction of a new 'BufferExtents' metadata record that's outside
of the buffer's contents but are written before the actual buffer.
This data is associated to the Buffer handed out by the BufferQueue
rather than a record that occupies bytes in the actual buffer.
* Removal of the "end of buffer" records. This is in-line with the
changes we described above, to allow for optimistic logging without
explicit record writing at thread exit.
The optimistic logging model operates under the following assumptions:
* Threads writing to the buffers will potentially race with the thread
attempting to flush the log. To avoid this situation from occuring,
we make sure that when we've finalized the logging implementation,
that threads will see this finalization state on the next write, and
either choose to not write records the thread would have written or
write the record(s) in two phases -- first write the record(s), then
update the extents metadata.
* We change the buffer queue implementation so that once it's handed
out a buffer to a thread, that we assume that buffer is marked
"used" to be able to capture partial writes. None of this will be
safe to handle if threads are racing to write the extents records
and the reader thread is attempting to flush the log. The optimism
comes from the finalization routine being required to complete
before we attempt to flush the log.
This is a fairly significant semantics change for the FDR
implementation. This is why we've decided to update the version number
for FDR mode logs. The tools, however, still need to be able to support
older versions of the log until we finally deprecate those earlier
versions.
Reviewers: dblaikie, pelikan, kpw
Subscribers: llvm-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D39526
llvm-svn: 318733
ASan requires that the min alignment be at least the shadow
granularity, so add an init function to do that.
Differential Revision: https://reviews.llvm.org/D39473
llvm-svn: 318717
Summary:
Correct handling of libpthread(3) functions in TSan/NetBSD:
- pthread_cond_init(3),
- pthread_cond_signal(3),
- pthread_cond_broadcast(3),
- pthread_cond_wait(3),
- pthread_cond_destroy(3),
- pthread_mutex_init(3),
- pthread_mutex_destroy(3),
- pthread_mutex_trylock(3),
- pthread_rwlock_init(3),
- pthread_rwlock_destroy(3),
- pthread_rwlock_rdlock(3),
- pthread_rwlock_tryrdlock(3),
- pthread_rwlock_wrlock(3),
- pthread_rwlock_trywrlock(3),
- pthread_rwlock_unlock(3),
- pthread_once(3).
Code out of the libpthread(3) context uses the libc symbols
that are prefixed with __libc_, for example: __libc_cond_init.
This caused that these functions were invisible to sanitizers on NetBSD.
Intercept the libc-specific ones and add them as NetBSD-specific aliases
for the common pthread(3) ones.
NetBSD needs to intercept both functions, as the regularly named ones
are used internally in libpthread(3).
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, dvyukov, vitalybuka
Reviewed By: dvyukov
Subscribers: kubamracek, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40243
llvm-svn: 318673
Summary:
NetBSD uses indirection for old threading functions for historical reasons
The mangled names are internal implementation detail and should not be
exposed even in backtraces.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, vitalybuka, dvyukov
Reviewed By: dvyukov
Subscribers: kubamracek, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40251
llvm-svn: 318671
Summary:
This change reverts r318575 and changes FindDynamicShadowStart() to
keep the memory range it found mapped PROT_NONE to make sure it is
not reused. We also skip MemoryRangeIsAvailable() check, because it
is (a) unnecessary, and (b) would fail anyway.
Reviewers: pcc, vitalybuka, kcc
Subscribers: srhines, kubamracek, mgorny, llvm-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D40203
llvm-svn: 318666
Summary:
This is a second attempt after D40100 induced racey crashes with ASan
(due to `__android_log_write` and the `strncpy` interceptor on API >= 21).
This new version checks the runtime API level to be <= `ANDROID_KITKAT` for
the use of `__android_log_write`, otherwise we use `syslog`, which should
conform with the previous behavior.
Unfortunately despite numerous efforts I couldn't reproduce the original
crashes in my environments so I couldn't test that the fix was actually
preventing crashes.
Reviewers: eugenis
Reviewed By: eugenis
Subscribers: llvm-commits, srhines, kubamracek
Differential Revision: https://reviews.llvm.org/D40149
llvm-svn: 318659
The __libc_mutex_lock, __libc_mutex_unlock and __libc_thr_setcancelstate
functions return int, not void.
This does not seem to introduce a functional change, however it looks
better with fixed the function prototype.
Sponsored by <The NetBSD Foundation>
llvm-svn: 318654
Summary:
Correct handling of three libpthread(3) functions on NetBSD:
- pthread_mutex_lock(3),
- pthread_mutex_unlock(3),
- pthread_setcancelstate(3).
Code out of the libpthread(3) context uses the libc symbols:
- __libc_mutex_lock,
- __libc_mutex_unlock,
- __libc_thr_setcancelstate.
The threading library (libpthread(3)) defines strong aliases:
- __strong_alias(__libc_mutex_lock,pthread_mutex_lock)
- __strong_alias(__libc_mutex_unlock,pthread_mutex_unlock)
- __strong_alias(__libc_thr_setcancelstate,pthread_setcancelstate)
This caused that these functions were invisible to sanitizers on NetBSD.
Intercept the libc-specific ones and add them as NetBSD-specific aliases
for the common pthread(3) ones.
NetBSD needs to intercept both functions, as the regularly named ones
are used internally in libpthread(3).
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, dvyukov, vitalybuka
Reviewed By: dvyukov
Subscribers: llvm-commits, kubamracek, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40241
llvm-svn: 318646
Revert the following commits:
r318369 [asan] Fallback to non-ifunc dynamic shadow on android<22.
r318235 [asan] Prevent rematerialization of &__asan_shadow.
r317948 [sanitizer] Remove unnecessary attribute hidden.
r317943 [asan] Use dynamic shadow on 32-bit Android.
MemoryRangeIsAvailable() reads /proc/$PID/maps into an mmap-ed buffer
that may overlap with the address range that we plan to use for the
dynamic shadow mapping. This is causing random startup crashes.
llvm-svn: 318575
PDB emission now works well enough that we can rely on it for these
tests to pass.
Differential Revision: https://reviews.llvm.org/D40188
llvm-svn: 318546
The tests are ported as follows:
contiguous_container_crash.cc
use-after-delete.cc
use-after-free.cc
Replace hardwired shadow granularity in CHECK statements with regex.
max_redzone.cc
Bump max_redzone parameter to 32.
memset_test.cc
Bump size parameter of __asan_poison_memory_region to 32.
scariness_score_test.cc
For "far-from-bounds" heap overflow, make sure overflow is more than
one shadow granularity away.
At large shadow granularity, there is not enough redzone between
stack elements to detect far-from-bounds, so fake out that test.
Differential Revision: https://reviews.llvm.org/D39773
llvm-svn: 318470
Rather than assertion failing, we can fall back to the
non-optimized version which works for any shadow scale.
Differential Revision: https://reviews.llvm.org/D39474
llvm-svn: 318460
Summary:
The patch seems to have turned some Android tests flaky. The reason is unclear.
This reverts D40100 in case we can't figure out what is happening.
Reviewers: eugenis
Reviewed By: eugenis
Subscribers: srhines, kubamracek
Differential Revision: https://reviews.llvm.org/D40138
llvm-svn: 318438
The requirement is that shadow memory must be aligned to page
boundaries (4k in this case). Use a closed form equation that always
satisfies this requirement.
Differential Revision: https://reviews.llvm.org/D39471
llvm-svn: 318421
Summary:
Recent Bionic have a slew of `async_safe_*` logging functions that are
basically the liblog ones but included within the libc. They have the advantage
of not allocating memory. `async_safe_write_log` does no formatting and is
likely the best candidate for logging.
Use a weak definition to try and use it. Also, avoid API level checks (as
the toolchain is compiled at a rather low API level) for `__android_log_write`
in favor of a weak definition as well.
Keep the fallback to `syslog` if nothing else was found.
I tried to overhaul the code block to only have a single #if SANITIZER_ANDROID
but I am not particularly attached to the form. LMKWYT.
Reviewers: eugenis
Reviewed By: eugenis
Subscribers: srhines, kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D40100
llvm-svn: 318410
The mulsc3_test.c was marked as unsupported due to PR32457, the underlying
cause of this PR was fixed in PR28164 so we can remove the unsupported as
it is no longer needed.
Differential Revision: https://reviews.llvm.org/D40076
llvm-svn: 318396
Summary:
lsan_preinit.cc is meant to be linked into executable and calls
lsan_init from .preinit_array section. But if liblsan is a shared library,
then this doesn't work, because the symbol is not exported. This patch fixes
that. The counterparts like asan_init or __tsan_init already do have
SANITIZER_INTERFACE_ATTRIBUTE.
Committing on behalf of jakubjelinek.
Reviewers: alekseyshl, kcc
Subscribers: llvm-commits
Differential revision: https://reviews.llvm.org/D39889
llvm-svn: 318349
Summary:
For some filesystems, readdir will not populate dirent::d_type with valuable information. This causes libfuzzer to proceed with an empty corpus, instead of the file it contains.
This has been tested on a server using XFS.
It should fix https://bugs.llvm.org//show_bug.cgi?id=25991
Reviewers: kcc
Reviewed By: kcc
Differential Revision: https://reviews.llvm.org/D40028
llvm-svn: 318303
Summary:
This implements an opportunistic check for the RSS limit.
For ASan, this was implemented thanks to a background thread checking the
current RSS vs the set limit every 100ms. This was deemed problematic for Scudo
due to potential Android concerns (Zygote as pointed out by Aleksey) as well as
the general inconvenience of having a permanent background thread.
If a limit (soft or hard) is specified, we will attempt to update the RSS limit
status (exceeded or not) every 100ms. This is done in an opportunistic way: if
we can update it, we do it, if not we return the current status, mostly because
we don't need it to be fully consistent (it's done every 100ms anyway). If the
limit is exceeded `allocate` will act as if OOM for a soft limit, or just die
for a hard limit.
We use the `common_flags()`'s `hard_rss_limit_mb` & `soft_rss_limit_mb` for
configuration of the limits.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D40038
llvm-svn: 318301
Summary:
This change fixes the XRay trampolines aside from the __xray_CustomEvent
trampoline to align the stack to 16-byte boundaries before calling the
handler. Before this change we've not been explicitly aligning the stack
to 16-byte boundaries, which makes it dangerous when calling handlers
that leave the stack in a state that isn't strictly 16-byte aligned
after calling the handlers.
We add a test that makes sure we can handle these cases appropriately
after the changes, and prevents us from regressing the state moving
forward.
Fixes http://llvm.org/PR35294.
Reviewers: pelikan, pcc
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D40004
llvm-svn: 318261
Summary:
This is mostly some cleanup and shouldn't affect functionalities.
Reviewing some code for a future addition, I realized that the complexity of
the initialization path was unnecessary, and so was maintaining a structure
for the allocator options throughout the initialization.
So we get rid of that structure, of an extraneous level of nesting for the
`init` function, and correct a couple of related code inaccuracies in the
flags cpp.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D39974
llvm-svn: 318157
It is included in the built sources for all other arches supported
for MinGW currently, except for arm.
Differential Revision: https://reviews.llvm.org/D39938
llvm-svn: 318139
Summary:
The ScudoAllocator uses a SecondaryHeader to keep track of the size and base address of each mmap'd chunk.
This aligns well with what the ReservedAddressRange is trying to do. This changeset converts the scudo allocator from using the MmapNoAccess/MmapFixed APIs to the ReservedAddressRange::Init and ::Map APIs. In doing so, it replaces the SecondayHeader struct with the ReservedAddressRange object.
This is part 3 of a 4 part changeset; part 1 https://reviews.llvm.org/D39072 and part 2 https://reviews.llvm.org/D38592
Reviewers: alekseyshl, mcgrathr, cryptoad, phosek
Reviewed By: cryptoad
Subscribers: llvm-commits, cryptoad, kubamracek
Differential Revision: https://reviews.llvm.org/D38593
llvm-svn: 318080
In more recent Linux kernels with 47 bit VMAs the layout of virtual memory
for powerpc64 changed causing the thread sanitizer to not work properly. This
patch adds support for 47 bit VMA kernels for powerpc64.
Tested on several 4.x and 3.x kernel releases.
llvm-svn: 318044
Allow user to override shadow scale in compiler_rt by passing
-DCOMPILER_RT_ASAN_SHADOW_SCALE=n to CMake. Propagate the override
shadow scale value via a compiler define to compiler-rt and asan
tests. Tests will use the define to partially disable unsupported
tests. Set "-mllvm -asan-mapping-scale=<n>" for compiler_rt tests.
Differential Revision: https://reviews.llvm.org/D39469
llvm-svn: 318038
Multi-config CMake generators need lit to be able to resolve paths of
artifacts from previous build steps at lit time, rather than expect them
to be fully resolved at CMake time as they may contain the build mode.
Differential Revision: https://reviews.llvm.org/D38471
llvm-svn: 318037
Cast SIG_IGN to (uptr).
SIG_IGN is defined on NetBSD as a function pointer and cannot be
assigned to an integer as it is.
sys/signal.h:#define SIG_IGN ((void (*)(int)) 1)
llvm-svn: 317978
This should fix windows build of compiler-rt broken in r317943.
The attribute is unnecessary because since GetMaxVirtualAddress was split in two,
we no longer use common_flags() in the ifunc resolver context.
llvm-svn: 317948
Summary:
The following kernel change has moved ET_DYN base to 0x4000000 on arm32:
https://marc.info/?l=linux-kernel&m=149825162606848&w=2
Switch to dynamic shadow base to avoid such conflicts in the future.
Reserve shadow memory in an ifunc resolver, but don't use it in the instrumentation
until PR35221 is fixed. This will eventually let use save one load per function.
Reviewers: kcc
Subscribers: aemerson, srhines, kubamracek, kristof.beyls, hiraditya, llvm-commits
Differential Revision: https://reviews.llvm.org/D39393
llvm-svn: 317943
If the lookup using RTLD_NEXT failed, the sanitizer runtime library
is later in the library search order than the DSO that we are trying
to intercept, which means that we cannot intercept this function. We
still want the address of the real definition, though, so look it up
using RTLD_DEFAULT.
Differential Revision: https://reviews.llvm.org/D39779
llvm-svn: 317930
Building with a new clang produces a bunch of warnings about dropped 'const' and 'volatile' qualifiers on pointers. Let's fix them.
Differential Revision: https://reviews.llvm.org/D39861
llvm-svn: 317929
Summary:
`getauxval` was introduced in 18 & 21 depending on the architecture. Bump the
requirement to 21.
It also turns out that the NDK is finicky: NDK r13b doesn't include sys/auxv.h
when creating a standalone toolchain at API level 19 for ARM. So 18 didn't work
well with older NDKs.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: aemerson, srhines, llvm-commits, kristof.beyls
Differential Revision: https://reviews.llvm.org/D39905
llvm-svn: 317907
Summary:
This change implements the changes required in both clang and
compiler-rt to allow building XRay-instrumented binaries in Darwin. For
now we limit this to x86_64. We also start building the XRay runtime
library in compiler-rt for osx.
A caveat to this is that we don't have the tests set up and running
yet, which we'll do in a set of follow-on changes.
This patch uses the monorepo layout for the coordinated change across
multiple projects.
Reviewers: kubamracek
Subscribers: mgorny, cfe-commits, llvm-commits
Differential Revision: https://reviews.llvm.org/D39114
llvm-svn: 317875
Summary:
This reverts D39490.
For toolchains generated with older NDKs (<=r13b as far as we tested),
`cpu_set_t` doesn't exist in `sched.h`.
We have to figure out another way to get the number of CPUs without this.
Reviewers: rnk
Reviewed By: rnk
Subscribers: kubamracek, llvm-commits, krytarowski
Differential Revision: https://reviews.llvm.org/D39867
llvm-svn: 317834
Summary:
The `b` instruction in Thumb1 has limited range, which may cause link-time errors if the jump target is far away.
This patch guards the tailcalls for non-Thumb1
Reviewers: peter.smith, compnerd, rengolin, eli.friedman
Reviewed By: rengolin
Subscribers: joerg, dalias, javed.absar, llvm-commits
Differential Revision: https://reviews.llvm.org/D39700
llvm-svn: 317814
In more recent Linux kernels (including those with 47 bit VMAs) the layout of
virtual memory for powerpc64 changed causing the memory sanitizer to not
work properly. This patch adjusts the memory ranges in the tables for the
memory sanitizer to work on the newer kernels while continuing to work on the
older ones as well.
Tested on several 4.x and 3.x kernel releases.
llvm-svn: 317802
Previously ubsan_standalone used the GetEnv function to read the
environment variables UBSAN_OPTIONS and UBSAN_SYMBOLIZER_PATH. The
problem with GetEnv is that it does not respect changes to the
environment variables made using the libc setenv function, which
prevents clients from setting environment variables to configure
ubsan before loading ubsan-instrumented libraries.
The reason why we have GetEnv is that some runtimes need to read
environment variables while they initialize using .preinit_array,
and getenv does not work while .preinit_array functions are being
called. However, it is unnecessary for ubsan_standalone to initialize
that early. So this change switches ubsan_standalone to using getenv
and removes the .preinit_array entry. The static version of the runtime
still ends up being initialized using a C++ constructor that exists
to support the shared runtime.
Differential Revision: https://reviews.llvm.org/D39827
llvm-svn: 317757
When building LLVM on x86_64-pc-linux-gnu (Fedora 25) with the bundled gcc 6.4.1
which uses gld 2.26.1-1.fc25, the dynamic/Asan-i386-calls-Dynamic-Test and
dynamic/Asan-i386-inline-Dynamic-Test tests failed to link with
/usr/bin/ld: /var/scratch/gcc/llvm/dist/lib/clang/6.0.0/lib/linux/libclang_rt.asan-i386.so: fork: invalid version 21 (max 0)
/var/scratch/gcc/llvm/dist/lib/clang/6.0.0/lib/linux/libclang_rt.asan-i386.so: error adding symbols: Bad value
I tried building with a self-compiled gcc 7.1.0 using gld 2.28, but the error remained.
It seems the error has been hit before (cf. https://reviews.llvm.org/rL314085), but
no real explanation has been found.
However, the problem goes away when linking the i386 libclang_rt.asan with a version
script just like every other variant is. Not using the version script in this single case
dates back to the initial introduction of the version script in r236551, but this change
was just checked in without any explanation AFAICT.
Since I've not found any other workaround and no reason for not always using the
version script, I propose to do so.
Tested on x86_64-pc-linux-gnu.
Patch by Rainer Orth.
Differential Revision: https://reviews.llvm.org/D39795
llvm-svn: 317738
Summary:
The NetBSD specific implementation of cxa_atexit() does not
preserve the 2nd argument if dso is equal to NULL.
Changes:
- Split paths of handling intercepted __cxa_atexit() and atexit(3).
This affects all supported Operating Systems.
- Add a local stack-like structure to hold the __cxa_atexit() context.
atexit(3) is documented in the C standard as calling callback from the
earliest to the oldest entry. This path also fixes potential ABI
problem of passing an argument to a function from the atexit(3)
callback mechanism.
- Add new test to ensure LIFO style of atexit(3) callbacks: atexit3.cc
Proposal to change the behavior of __cxa_atexit() in NetBSD has been rejected.
With the above changes TSan/NetBSD with the current tsan_interceptors.cc
can bootstrap into operation.
Sponsored by <The NetBSD Foundation>
Reviewers: vitalybuka, dvyukov, joerg, kcc, eugenis
Reviewed By: dvyukov
Subscribers: kubamracek, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D39619
llvm-svn: 317735
Summary:
This patch implements flock for Windows, needed to make gcda writing work in a multiprocessing scenario.
Fixes https://bugs.llvm.org/show_bug.cgi?id=34923.
Reviewers: zturner
Reviewed By: zturner
Subscribers: rnk, zturner, llvm-commits
Differential Revision: https://reviews.llvm.org/D38891
llvm-svn: 317705
Summary:
Scudo abides by the coding style enforced by the sanitizer_common
linter, but as of right now, it's not linter-enforced.
Add Scudo to the list of directories checked by check_lint.sh.
Also: fixes some linter errors found after getting this running.
Reviewers: cryptoad
Reviewed By: cryptoad
Subscribers: llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D39757
llvm-svn: 317699
Summary:
Sufficiently old Linux kernel headers don't provide the PR_SET_PTRACER, but we can still call prctl with it if the runtime kernel is newer. Even if it's not, prctl will only return EINVAL.
Patch by Mike Hommey <mh-llvm@glandium.org>
Reviewers: eugenis
Reviewed By: eugenis
Subscribers: sylvestre.ledru, cfe-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D39717
llvm-svn: 317668
Summary:
These will be used in an ifunc resolver, when the binary may not be
completely relocated, and syscall() function from libc could not be
used.
Reviewers: dvyukov, vitalybuka
Subscribers: aemerson, kubamracek, javed.absar, llvm-commits, kristof.beyls
Differential Revision: https://reviews.llvm.org/D39701
llvm-svn: 317640
Summary:
When testing a merge of compiler-rt r304709 into gcc trunk on x86-64-pc-linux-gnu,
I ran into two compile errors:
sanitizer_common/sanitizer_symbolizer_libbacktrace.cc:96:73: error: no matching function for call to '__sanitizer::AddressInfo::FillModuleInfo(char*&, __sanitizer::uptr&)'
All other files in sanitizer_common (with the exception of sanitizer_malloc_mac.inc
which is special) include sanitizer_platform.h without directory name.
Patch by Mike Jongen
Reviewers: kcc, vitalybuka
Reviewed By: kcc
Subscribers: kubamracek, fedor.sergeev, llvm-commits
Differential Revision: https://reviews.llvm.org/D33933
llvm-svn: 317608
We allow usage of global/per-thread data with non-trivial ctors/dtors
throughout tsan code base by placing all global/per-thread data into
Context/ThreadState and then explicitly constructing them with
placement new. This greatly simplifies code by restricting the
"linker initialized plague" to only these 2 objects.
Do the same for interceptors data.
This allows to use Vector instead of bunch of hand-written code in:
https://reviews.llvm.org/D39619
Reviewed in: https://reviews.llvm.org/D39721
llvm-svn: 317587
Summary:
Update sanitizer_allocator to use new API.
Second patch in a series. First patch https://reviews.llvm.org/D39072
Updates MmapNoAccess / MmapFixed call sites in the saniziter_allocator
to use the new Init/Map APIs instead.
Reviewers: alekseyshl, cryptoad, phosek, mcgrathr, dvyukov
Reviewed By: alekseyshl, cryptoad
Subscribers: dvyukov, mcgrathr, kubamracek
Differential Revision: https://reviews.llvm.org/D38592
llvm-svn: 317586
Summary:
Relanding D38600, which was reverted due to various PPC bot failures.
If it breaks something again, please provide some pointers to broken
bots, not just revert it, otherwise it's very hard to reason what's
wrong with this commit.
Whenever possible (Linux + glibc 2.16+), detect dynamic loader module by
its base address, not by the module name matching. The current name
matching approach fails on some configurations.
Reviewers: eugenis
Subscribers: kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D39275
llvm-svn: 317512
Summary:
According to man, pthread_setcancelstate's oldstate and
pthread_setcanceltype's oldtype parameters can be nullptr.
Check these parameters for != nullptr before attempting to
access their shadow memory.
Reviewers: dvyukov
Subscribers: kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D39626
llvm-svn: 317494
Summary: The PARENT_TARGET was correctly set under APPLE but not under linux.
Reviewers: kubamracek, samsonov
Subscribers: dberris, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D39621
llvm-svn: 317391
Summary:
Call NanoTime() in primary 64 bit allocator only when necessary,
otherwise the unwarranted syscall causes problems in sandbox environments.
ReleaseToOSIntervalMs() conditional allows them to turn the feature off
with allocator_release_to_os_interval_ms=-1 flag.
Reviewers: eugenis
Subscribers: kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D39624
llvm-svn: 317386
Summary:
Stop using the Linux solution with pthread_key_create(3).
This approach does not work on NetBSD, because calling
the thread destructor is not the latest operation on a POSIX
thread entity. NetBSD's libpthread still calls at least
pthread_mutex_lock and pthread_mutex_unlock.
Detect _lwp_exit(2) call as it is really the latest operation
called from a detaching POSIX thread.
This resolves one set of crashes observed in
the Thread Sanitizer execution.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, kcc, vitalybuka, dvyukov, eugenis
Reviewed By: vitalybuka
Subscribers: llvm-commits, kubamracek, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D39618
llvm-svn: 317363
Summary:
The split in D39461 introduced separate C++ flags, but `cxx_flags` needs `-lrt` as well for the standalone build.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D39497
llvm-svn: 317103
Summary:
Initially, Scudo had a monolithic design where both C and C++ functions were
living in the same library. This was not necessarily ideal, and with the work
on -fsanitize=scudo, it became more apparent that this needed to change.
We are splitting the new/delete interceptor in their own C++ library. This
allows more flexibility, notably with regard to std::bad_alloc when the work is
done. This also allows us to not link new & delete when using pure C.
Additionally, we add the UBSan runtimes with Scudo, in order to be able to have
a -fsanitize=scudo,undefined in Clang (see work in D39334).
The changes in this patch:
- split the cxx specific code in the scudo cmake file into a new library;
(remove the spurious foreach loop, that was not necessary)
- add the UBSan runtimes (both C and C++);
- change the test cmake file to allow for specific C & C++ tests;
- make C tests pure C, rename their extension accordingly.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D39461
llvm-svn: 317097
Fails on darwin
Revert "[fuzzer] Script to detect unbalanced allocation in -trace_malloc output"
Needs previous one.
This reverts commit r317034, r317036.
llvm-svn: 317061
Summary: This should fix the Windows bots after D39072.
Reviewers: alekseyshl, flowerhack
Reviewed By: flowerhack
Subscribers: llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D39426
llvm-svn: 316937
Summary:
Fixed version of https://reviews.llvm.org/D38437 (fixes Win/Fuchsia failures).
Creating a new revision, since the old one was getting a bit old/crowded.
In Fuchsia, MmapNoAccess/MmapFixedOrDie are implemented using a global
VMAR, which means that MmapNoAccess can only be called once. This works
for the sanitizer allocator but *not* for the Scudo allocator.
Hence, this changeset introduces a new ReservedAddressRange object to
serve as the new API for these calls. In this changeset, the object
still calls into the old Mmap implementations.
The next changeset two changesets will convert the sanitizer and scudo
allocators to use the new APIs, respectively. (ReservedAddressRange will
replace the SecondaryHeader in Scudo.)
Finally, a last changeset will update the Fuchsia implementation.
Reviewers: alekseyshl, cryptoad, phosek
Reviewed By: alekseyshl, cryptoad
Subscribers: kubamracek
Differential Revision: https://reviews.llvm.org/D39072
llvm-svn: 316934
Summary:
This change removes dependencies on STL types:
- std::aligned_storage -- we're using manually-aligned character
buffers instead for metadata and function records.
- std::tuple -- use a plain old struct instead.
This is an incremental step in removing all STL references from the
compiler-rt implementation of XRay (llvm.org/PR32274).
Reviewers: dblaikie, pelikan, kpw
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D39277
llvm-svn: 316816
Summary:
This introduces `SCUDO_MAX_CACHES` allowing to define an upper bound to the
number of `ScudoTSD` created in the Shared TSD model (by default 32U).
This name felt clearer than `SCUDO_MAX_TSDS` which is technically what it really
is. I am opened to suggestions if that doesn't feel right.
Additionally change `getNumberOfCPUs` to return a `u32` to be more consistent.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D39338
llvm-svn: 316788
Summary:
LSan is functional on PPC64 Linux now, let's enable all tests.
One test required ppc specific changes: use_registers.cc.
Reviewers: eugenis
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D39316
llvm-svn: 316698
Summary:
With new release to OS approach (see D38245) it's reasonable to enable
it by default. Setting allocator_release_to_os_interval_ms to 5000 seems
to be a reasonable default (might be tuned later, based on the
feedback).
Also delaying the first release to OS in each bucket for at least
allocator_release_to_os_interval_ms after the first allocation to
prevent just allocated memory to be madvised back to OS and let short
lived processes to avoid release to OS overhead altogether.
Reviewers: cryptoad
Subscribers: kubamracek, llvm-commits, mehdi_amini
Differential Revision: https://reviews.llvm.org/D39318
llvm-svn: 316683
Summary: Now the limits are the same as for ASan allocator.
Reviewers: cryptoad
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D39309
llvm-svn: 316633
Summary:
The 32-bit allocator is now on par with the 64-bit in terms of security (chunks
randomization is done, batches separation is done).
Unless objection, the comment can go away.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D39303
llvm-svn: 316620
Summary:
The 64-bit primary has had random shuffling of chunks for a while, this
implements it for the 32-bit primary. Scudo is currently the only user of
`kRandomShuffleChunks`.
This change consists of a few modifications:
- move the random shuffling functions out of the 64-bit primary to
`sanitizer_common.h`. Alternatively I could move them to
`sanitizer_allocator.h` as they are only used in the allocator, I don't feel
strongly either way;
- small change in the 64-bit primary to make the `rand_state` initialization
`UNLIKELY`;
- addition of a `rand_state` in the 32-bit primary's `SizeClassInfo` and
shuffling of chunks when populating the free list.
- enabling the `random_shuffle.cpp` test on platforms using the 32-bit primary
for Scudo.
Some comments on why the shuffling is done that way. Initially I just
implemented a `Shuffle` function in the `TransferBatch` which was simpler but I
came to realize this wasn't good enough: for chunks of 10000 bytes for example,
with a `CompactSizeClassMap`, a batch holds only 1 chunk, meaning shuffling the
batch has no effect, while a region is usually 1MB, eg: 104 chunks of that size.
So I decided to "stage" the newly gathered chunks in a temporary array that
would be shuffled prior to placing the chunks in batches.
The result is looping twice through n_chunks even if shuffling is not enabled,
but I didn't notice any significant significant performance impact.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D39244
llvm-svn: 316596
ASan allocator stores the requested alignment for new and new[] calls
and on delete and delete[] verifies that alignments do match.
The representable alignments are: default alignment, 8, 16, 32, 64, 128,
256 and 512 bytes. Alignments > 512 are stored as 512, hence two
different alignments > 512 will pass the check (possibly masking the bug),
but limited memory requirements deemed to be a resonable tradeoff for
relaxed conditions.
The feature is controlled by new_delete_type_mismatch flag, the same one
protecting new/delete matching size check.
Differential revision: https://reviews.llvm.org/D38574
Issue: https://github.com/google/sanitizers/issues/799
llvm-svn: 316595
Summary:
Changes:
* Add initial msan stub support.
* Handle NetBSD specific pthread_setname_np(3).
* NetBSD supports __attribute__((tls_model("initial-exec"))),
define it in SANITIZER_TLS_INITIAL_EXEC_ATTRIBUTE.
* Add ReExec() specific bits for NetBSD.
* Simplify code and add syscall64 and syscall_ptr for !NetBSD.
* Correct bunch of syscall wrappers for NetBSD.
* Disable test/tsan/map32bit on NetBSD as not applicable.
* Port test/tsan/strerror_r to a POSIX-compliant OSes.
* Disable __libc_stack_end on NetBSD.
* Disable ReadNullSepFileToArray() on NetBSD.
* Define struct_ElfW_Phdr_sz, detected missing symbol by msan.
* Change type of __sanitizer_FILE from void to char. This helps
to reuse this type as an array. Long term it will be properly
implemented along with SANITIZER_HAS_STRUCT_FILE setting to 1.
* Add initial NetBSD support in lib/tsan/go/buildgo.sh.
* Correct referencing stdout and stderr in tsan_interceptors.cc
on NetBSD.
* Document NetBSD x86_64 specific virtual memory layout in
tsan_platform.h.
* Port tests/rtl/tsan_test_util_posix.cc to NetBSD.
* Enable NetBSD tests in test/msan/lit.cfg.
* Enable NetBSD tests in test/tsan/lit.cfg.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, vitalybuka, eugenis, kcc, dvyukov
Reviewed By: dvyukov
Subscribers: #sanitizers, llvm-commits, kubamracek
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D39124
llvm-svn: 316591
Summary:
They might not be mapped on some platforms such as Win64. In
particular, this happens if the user address is null. There will not be
any shadow memory 5*16 bytes before the user address. This happens on
Win64 in the error_report_callback.cc test case. It's not clear why this
isn't a problem on Linux as well.
Fixes PR35058
Reviewers: vitalybuka
Subscribers: kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D39260
llvm-svn: 316589
C99 technically requires the rest arguments to be used in C variadic macros.
This presents a problem with the macro SCOPED_TSAN_INTERCEPTOR when func
takes no arguments. This happens with the function pause. Like other void
argument functions, we pass in a fake argument to avoid this warning.
Author: Alex Langford (xiaobai)
Reviewed in: https://reviews.llvm.org/D39151
llvm-svn: 316558
Improves the test behaviour in the face of failure. Without this change
the fdr-single-thread.cc test may leave around artefacts of a previous
failing run since the cleanup doesn't happen if any of the intermediary
steps fail.
Non-functional change.
Subscribers: llvm-commits
llvm-svn: 316548
Summary:
Similar to NetBSD, in FreeBSD, the first returned entry when callbacks
are done via dl_iterate_phdr will return the main program. Ignore that
entry when checking that the dynamic ASan lib is loaded first.
Reviewers: eugenis, krytarowski, emaste, joerg
Reviewed By: eugenis, krytarowski
Subscribers: kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D39253
llvm-svn: 316487
Summary:
This change removes the dependency on C++ standard library
types/functions in the implementation of the buffer queue. This is an
incremental step in resolving llvm.org/PR32274.
Reviewers: dblaikie, pelikan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D39175
llvm-svn: 316406
Summary: The result of clang-format and few manual changes (as prompted on D39155).
Reviewers: vitalybuka
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D39211
llvm-svn: 316395
Summary:
Fuzzing targets that allocate/deallocate a lot of memory tend to consume
a lot of RSS when ASan quarantine is enabled. Purging quarantine between
iterations and returning memory to OS keeps RSS down and should not
reduce the quarantine effectiveness provided the fuzz target does not
preserve state between iterations (in this case this feature can be turned off).
Based on D39153.
Reviewers: vitalybuka
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D39155
llvm-svn: 316382
Breaks build:
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/4677/steps/build%20with%20ninja/logs/stdio
In file included from compiler-rt/lib/xray/xray_fdr_logging.cc:34:
In file included from compiler-rt/lib/xray/xray_fdr_logging_impl.h:36:
In file included from compiler-rt/lib/xray/xray_flags.h:18:
compiler-rt/lib/xray/../sanitizer_common/sanitizer_flag_parser.h:23:7: error: '__sanitizer::FlagHandlerBase' has virtual functions but non-virtual destructor [-Werror,-Wnon-virtual-dtor]
class FlagHandlerBase {
llvm-svn: 316348
Summary:
Purging allocator quarantine and returning memory to OS might be desired
between fuzzer iterations since, most likely, the quarantine is not
going to catch bugs in the code under fuzz, but reducing RSS might
significantly prolong the fuzzing session.
Reviewers: cryptoad
Subscribers: kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D39153
llvm-svn: 316347
Summary:
Up to now, the Scudo cmake target only provided a static library that had to be
linked to an executable to benefit from the hardened allocator.
This introduces a shared library as well, that can be LD_PRELOAD'ed.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D38980
llvm-svn: 316342
Add a new flag, __tsan_mutex_not_static, which has the opposite sense
of __tsan_mutex_linker_init. When the new __tsan_mutex_not_static flag
is passed to __tsan_mutex_destroy, tsan ignores the destruction unless
the mutex was also created with the __tsan_mutex_not_static flag.
This is useful for constructors that otherwise woud set
__tsan_mutex_linker_init but cannot, because they are declared constexpr.
Google has a custom mutex with two constructors, a "linker initialized"
constructor that relies on zero-initialization and sets
__tsan_mutex_linker_init, and a normal one which sets no tsan flags.
The "linker initialized" constructor is morally constexpr, but we can't
declare it constexpr because of the need to call into tsan as a side effect.
With this new flag, the normal c'tor can set __tsan_mutex_not_static,
the "linker initialized" constructor can rely on tsan's lazy initialization,
and __tsan_mutex_destroy can still handle both cases correctly.
Author: Greg Falcon (gfalcon)
Reviewed in: https://reviews.llvm.org/D39095
llvm-svn: 316209
Summary:
Fixes https://bugs.llvm.org/show_bug.cgi?id=34922.
Apparently, the mode in **fdopen** gets simply ignored and Windows only cares about the mode of the original **open**.
I have verified this both with the simple case from bug 34922 and with a full Firefox build.
Reviewers: zturner
Reviewed By: zturner
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D38984
llvm-svn: 316048
Summary:
In FDR Mode, when we set up a new buffer for a thread that's just
overflowed, we must place the CPU identifier with the TSC record as the
first record. This is so that we can reconstruct all the function
entry/exit with deltas rooted on a TSC record for the CPU at the
beginning of the buffer.
Without doing this, the tools are rejecting the log for cases when we've
overflown and have different buffers that don't have the CPU and TSC
records as the first entry in the buffers.
Reviewers: pelikan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D38995
llvm-svn: 315987
Summary:
Move the `sanitizer_posix.h` include within the `SANITIZER_ANDROID` `#if`,
otherwise this errors when built on non-Posix platforms (eg: Fuchsia).
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D38956
llvm-svn: 315917
It is possible for both a base and a derived class to be satisfied
with a unique vtable. If a program contains casts of the same pointer
to both of those types, the CFI checks will be lowered to this
(with ThinLTO):
if (p != &__typeid_base_global_addr)
trap();
if (p != &__typeid_derived_global_addr)
trap();
The optimizer may then use the first condition combined
with the assumption that __typeid_base_global_addr and
__typeid_derived_global_addr may not alias to optimize away the second
comparison, resulting in an unconditional trap.
This patch fixes the bug by giving imported globals the type [0 x i8]*,
which prevents the optimizer from assuming that they do not alias.
Differential Revision: https://reviews.llvm.org/D38873
llvm-svn: 315753
Summary:
Follow up to D38826.
We introduce `pthread_{get,set}specific` versions of `{get,set}CurrentTSD` to
allow for non Android platforms to use the Shared TSD model.
We now allow `SCUDO_TSD_EXCLUSIVE` to be defined at compile time.
A couple of things:
- I know that `#if SANITIZER_ANDROID` is not ideal within a function, but in
the end I feel it looks more compact and clean than going the .inc route; I
am open to an alternative if anyone has one;
- `SCUDO_TSD_EXCLUSIVE=1` requires ELF TLS support (and not emutls as this uses
malloc). I haven't found anything to enforce that, so it's currently not
checked.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, llvm-commits
Differential Revision: https://reviews.llvm.org/D38854
llvm-svn: 315751
Remove the redundant dependency on 'gtest' target from the dynamic tests
in non-MSVC environment. The tests reuse compiled objects
from ASAN_INST_TEST_OBJECTS, and therefore they have been built against
gtest already.
This both fixes the spurious dependency on 'gtest' target that breaks
stand-alone builds, and brings the dynamic tests more in line with
regular tests which do not pass this dependency
to add_compiler_rt_test() through generate_compiler_rt_tests().
Differential Revision: https://reviews.llvm.org/D38840
llvm-svn: 315620
Fix the gtest dependency to be included in DEPS only, rather than
in COMPILE_DEPS + DEPS. The former variable is apparently used to
provide unconditional dependencies, while the latter are only used
for non-standalone builds. Since they are concatenated, specifying gtest
in both is redundant. Furthermore, including it in COMPILE_DEPS causes
build failure for standalone builds where 'gtest' target is not present.
Differential Revision: https://reviews.llvm.org/D38839
llvm-svn: 315605
Fix typo in variable assignment inside sanitizer_test_compile() that
resulted in TEST_DEPS parameter not being included in the clang_compile()
call. Spotted by George Karpenkov in D38444.
Differential Revision: https://reviews.llvm.org/D38838
llvm-svn: 315604
Summary:
This first part just prepares the grounds for part 2 and doesn't add any new
functionality. It mostly consists of small refactors:
- move the `pthread.h` include higher as it will be used in the headers;
- use `errno.h` in `scudo_allocator.cpp` instead of the sanitizer one, update
the `errno` assignments accordingly (otherwise it creates conflicts on some
platforms due to `pthread.h` including `errno.h`);
- introduce and use `getCurrentTSD` and `setCurrentTSD` for the shared TSD
model code;
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: llvm-commits, srhines
Differential Revision: https://reviews.llvm.org/D38826
llvm-svn: 315583
The SanitizerCommon.ReservedAddressRangeUnmap test fails on Windows:
FAIL: SanitizerCommon-Unit :: ./Sanitizer-x86_64-Test.exe/SanitizerCommon.ReservedAddressRangeUnmap (34003 of 35554)
******************** TEST 'SanitizerCommon-Unit :: ./Sanitizer-x86_64-Test.exe/SanitizerCommon.ReservedAddressRangeUnmap' FAILED ********************
Note: Google Test filter = SanitizerCommon.ReservedAddressRangeUnmap
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from SanitizerCommon
[ RUN ] SanitizerCommon.ReservedAddressRangeUnmap
==3780==ERROR: SanitizerTool failed to deallocate 0x1000 (4096) bytes at address 0x0000000c3000 (error code: 487)
==3780==Sanitizer CHECK failed: E:\b\build\slave\win_upload_clang\build\src\third_party\llvm\projects\compiler-rt\lib\sanitizer_common\sanitizer_win.cc:129 (("unable to unmap" && 0)) != (0) (0, 0)
********************
Testing: 0 .. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
Testing Time: 299.76s
********************
Failing Tests (1):
SanitizerCommon-Unit :: ./Sanitizer-x86_64-Test.exe/SanitizerCommon.ReservedAddressRangeUnmap
> In Fuchsia, MmapNoAccess/MmapFixedOrDie are implemented using a global
> VMAR, which means that MmapNoAccess can only be called once. This works
> for the sanitizer allocator but *not* for the Scudo allocator.
>
> Hence, this changeset introduces a new ReservedAddressRange object to
> serve as the new API for these calls. In this changeset, the object
> still calls into the old Mmap implementations.
>
> The next changeset two changesets will convert the sanitizer and scudo
> allocators to use the new APIs, respectively. (ReservedAddressRange will
> replace the SecondaryHeader in Scudo.)
>
> Finally, a last changeset will update the Fuchsia implementation.
>
> Patch by Julia Hansbrough
>
> Differential Revision: https://reviews.llvm.org/D38437
llvm-svn: 315553
In Fuchsia, MmapNoAccess/MmapFixedOrDie are implemented using a global
VMAR, which means that MmapNoAccess can only be called once. This works
for the sanitizer allocator but *not* for the Scudo allocator.
Hence, this changeset introduces a new ReservedAddressRange object to
serve as the new API for these calls. In this changeset, the object
still calls into the old Mmap implementations.
The next changeset two changesets will convert the sanitizer and scudo
allocators to use the new APIs, respectively. (ReservedAddressRange will
replace the SecondaryHeader in Scudo.)
Finally, a last changeset will update the Fuchsia implementation.
Patch by Julia Hansbrough
Differential Revision: https://reviews.llvm.org/D38437
llvm-svn: 315533
Summary:
This is a new attempt at D38706, which had 2 issues.
The first one was that it broke TSan, because `sanitizer_errno.h` was not
directly included in `tsan_mman.cc`. This fixes the include.
The second one was that it broke the nolibc build, because `__errno_location`
couldn't be found. This adds the new .cc to the libcdep list instead of the
base one.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: kubamracek, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D38743
llvm-svn: 315509
In Fuchsia, MmapNoAccess/MmapFixedOrDie are implemented using a global
VMAR, which means that MmapNoAccess can only be called once. This works
for the sanitizer allocator but *not* for the Scudo allocator.
Hence, this changeset introduces a new ReservedAddressRange object to
serve as the new API for these calls. In this changeset, the object
still calls into the old Mmap implementations.
The next changeset two changesets will convert the sanitizer and scudo
allocators to use the new APIs, respectively. (ReservedAddressRange will
replace the SecondaryHeader in Scudo.)
Finally, a last changeset will update the Fuchsia implementation.
Patch by Julia Hansbrough
Differential Revision: https://reviews.llvm.org/D38759
llvm-svn: 315493
This is a very poorly named feature. I think originally it meant to cover linux only, but the use of it in msan
seems to be about any aarch64 platform. Anyway, this change should be NFC on everything except Android.
llvm-svn: 315389
Summary:
D38706 breaks tsan and the nolibc build.
Reverting while working on a fix.
Reviewers: alekseyshl
Subscribers: kubamracek, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D38739
llvm-svn: 315320
Summary:
The fact that `sanitizer_allocator_checks.h` is including `sanitizer_errno.h`
creates complications for future changes, where it would conflict with `errno.h`
definitions on Android and Fuchsia (macro redefinition).
By moving the portion that sets errno in the checks to a separate compilation
unit, we avoid the inclusion of the header there, which solves the issue.
Not that it is not vital to have that function in a header as it is called as a
result of an unlikely event, and doesn't need to be inlined.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: kubamracek, llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D38706
llvm-svn: 315319
Fuchsia doesn't support signals, so don't use interceptors for signal or
sigaction.
Differential Revision: https://reviews.llvm.org/D38669
llvm-svn: 315227
Summary:
Since D37924 and D37925 were merged, it's now possible to specify
individual sanitizers or CFI modes in sanitizer blacklists. Update the
CFI blacklist entries to only apply to cfi-unrelated-cast checks.
Reviewers: eugenis, pcc
Reviewed By: eugenis
Subscribers: kcc
Differential Revision: https://reviews.llvm.org/D38385
llvm-svn: 315216
As a follow-up to r315142, this makes it possible to use ubsan with a
static runtime on Darwin. I've also added a new StandaloneStatic testing
configuration so the new setup can be tested.
llvm-svn: 315143
Summary:
Enable check-cfi and check-ubsan on Android.
Check-ubsan includes standalone and ubsan+asan, but not tsan or msan.
Cross-dso cfi tests are disabled for now.
Reviewers: vitalybuka, pcc
Subscribers: srhines, kubamracek, llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D38608
llvm-svn: 315105
Replace a partial workaround for ld.bfd strangeness with the ultimate one: -fuse-ld=gold.
Reason: ld.bfd problem gets worse with libc++-based NDK toolchain.
llvm-svn: 315039
Summary:
It can be enabled via "-use_clang_coverage=1" flag. Reason for disabling:
libFuzzer resets Clang Counters and makes it impossible to generate coverage
report for a regular fuzz target (i.e. not standalone build).
Reviewers: kcc
Reviewed By: kcc
Subscribers: kcc
Differential Revision: https://reviews.llvm.org/D38604
llvm-svn: 315029
Summary:
Relanding D33859, which was reverted because it has "broken LOTS of
ARM/AArch64 bots for two days".
If it breaks something again, please provide some pointers to broken
bots, not just revert it, otherwise it's very hard to reason what's
wrong with this commit.
Whenever possible (Linux + glibc 2.16+), detect dynamic loader module by
its base address, not by the module name matching. The current name
matching approach fails on some configurations.
Reviewers: eugenis
Subscribers: aemerson, kubamracek, kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D38600
llvm-svn: 315024
Summary:
This prevents the confusion when there are similarly named tests in
different configurations (like in test/sanitizer_common).
Reviewers: vitalybuka
Subscribers: srhines, llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D38526
llvm-svn: 315011
Summary:
Run CFI tests on all targets current toolchain can target.
On multiarch Linux, this will run all CFI tests with -m32 and -m64.
Reviewers: pcc
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D38572
llvm-svn: 315001
Summary:
This change allows the XRay basic (naive) mode logging implementation to
start writing the payload entries through the arg1 logging handler. This
implementation writes out the records that the llvm-xray tool and the
trace reader library will start processing in D38550.
This introduces a new payload record type which logs the data through
the in-memory buffer. It uses the same size/alignment that the normal
XRay record entries use. We use a new record type to indicate these new
entries, so that the trace reader library in LLVM can start reading
these entries.
Depends on D38550.
Reviewers: pelikan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D38551
llvm-svn: 314968
Summary:
This change moves cxx-abi library in asan/ubsan/dd link command line
ahead of other libraries, such as pthread/rt/dl/c/gcc. Given that
cxx-abi may be the full libstdc++/libc++, it makes sense for it to be
ahead of libc and libgcc, at least.
The real motivation is Android, where in the arm32 NDK toolchain
libstdc++.a is actually a linker script that tries to sneak LLVM's
libunwind ahead of libgcc's. Wrong library order breaks unwinding.
Reviewers: srhines, danalbert
Subscribers: aemerson, kubamracek, mgorny, kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D38520
llvm-svn: 314948
Summary:
This change removes the dependency on using a std::deque<...> for the
storage of the buffers in the buffer queue. We instead implement a
fixed-size circular buffer that's resilient to exhaustion, and preserves
the semantics of the BufferQueue.
We're moving away from using std::deque<...> for two reasons:
- We want to remove dependencies on the STL for data structures.
- We want the data structure we use to not require re-allocation in
the normal course of operation.
The internal implementation of the buffer queue uses heap-allocated
arrays that are initialized once when the BufferQueue is created, and
re-uses slots in the buffer array as buffers are returned in order.
We also change the lock used in the implementation to a spinlock
instead of a blocking mutex. We reason that since the release operations
now take very little time in the critical section, that a spinlock would
be appropriate.
This change is related to D38073.
This change is a re-submit with the following changes:
- Keeping track of the live buffers with a counter independent of the
pointers keeping track of the extents of the circular buffer.
- Additional documentation of what the data members are meant to
represent.
Reviewers: dblaikie, kpw, pelikan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D38119
llvm-svn: 314877
Summary:
When the XRay user calls the API to finish writing the log, the thread
which is calling the API still hasn't finished and therefore won't get
its trace written. Add a test for only the main thread to check this.
Reviewers: dberris
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D38493
llvm-svn: 314875
r303188 removed all the uses of aliases for EABI functions from
compiler-rt, because some of them had mismatched calling conventions.
Obviously, we can't use aliases for functions which don't have the same
calling convention, but that's only an issue for floating-point
functions with the hardfloat ABI. In other cases, the stubs increase
size and reduce performance for no benefit.
This patch adds back the aliases, with appropriate checks to make sure
they're only used in cases where the calling convention matches.
llvm-svn: 314851
Summary:
This change removes the dependency on using a std::deque<...> for the
storage of the buffers in the buffer queue. We instead implement a
fixed-size circular buffer that's resilient to exhaustion, and preserves
the semantics of the BufferQueue.
We're moving away from using std::deque<...> for two reasons:
- We want to remove dependencies on the STL for data structures.
- We want the data structure we use to not require re-allocation in
the normal course of operation.
The internal implementation of the buffer queue uses heap-allocated
arrays that are initialized once when the BufferQueue is created, and
re-uses slots in the buffer array as buffers are returned in order.
We also change the lock used in the implementation to a spinlock
instead of a blocking mutex. We reason that since the release operations
now take very little time in the critical section, that a spinlock would
be appropriate.
This change is related to D38073.
Reviewers: dblaikie, kpw, pelikan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D38119
llvm-svn: 314766
Summary:
We avoid using C++11's thread_local keyword on non-trivially
destructible objects because it may introduce deadlocks when the C++
runtime registers destructors calling std::malloc(...). The deadlock may
happen when the allocator implementation is itself XRay instrumented.
To avoid having to call malloc(...) and free(...) in particular, we use
pthread_once, pthread_create_key, and pthread_setspecific to instead
manually register the cleanup implementation we want.
The code this replaces used an RAII type that implements the cleanup
functionality in the destructor, that was then initialized as a
function-local thread_local object. While it works in usual situations,
unfortunately it breaks when using a malloc implementation that itself
is XRay-instrumented.
Reviewers: dblaikie, kpw, pelikan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D38073
llvm-svn: 314764
Summary:
clang does not assemble files in thumb mode unless .thumb declaration
is present. Add .thumb/.arm decl to _FUNCTION macros to ensure that
files are assembled correctly.
Also add a fix to ensure that armv7k-watchos can assemble the
aeabi_c{f|d}cmp.S files.
Fixes PR 34715.
Reviewers: compnerd, peter.smith, srhines, weimingz, rengolin, efriedma, t.p.northover, fjricci
Reviewed By: compnerd
Subscribers: aemerson, javed.absar, llvm-commits, kristof.beyls
Differential Revision: https://reviews.llvm.org/D38390
llvm-svn: 314718
Summary:
Adds a fallback mode to procmaps when the symbolizer
fails to locate a module for a given address by using
dl_iterate_phdr.
Reviewers: kubamracek, rnk, vitalybuka, eugenis
Reviewed By: eugenis
Subscribers: srhines, llvm-commits
Differential Revision: https://reviews.llvm.org/D37269
llvm-svn: 314713
Summary:
Adds a fallback mode to procmaps when the symbolizer
fails to locate a module for a given address by using
dl_iterate_phdr.
Reviewers: kubamracek, rnk, vitalybuka, eugenis
Reviewed By: eugenis
Subscribers: srhines, llvm-commits
Differential Revision: https://reviews.llvm.org/D37269
llvm-svn: 314671
Make it possible to control building profile runtime separately from
other options. Before r313549, the profile runtime building was
controlled along with sanitizers. However, since that commit it is built
unconditionally which results in multiple builds for people building
different runtimes separately.
Differential Revision: https://reviews.llvm.org/D38441
llvm-svn: 314646
Unreverting this patch because llvm-clang-lld-x86_64-debian-fast started
passing again before the revert hit. Must've been just a flake.
llvm-svn: 314556
TEST_BIG_ENDIAN() performs compile tests that will fail with
-nodefaultlibs when building under LLVM_USE_SANITIZER.
Differential Revision: https://reviews.llvm.org/D38277
llvm-svn: 314512
The function was introduced as a convenience that used to be called in
multiple places. Recent refactorings have removed the need to call this
function in multiple places, so inlined the implementation in the single
place it's defined.
Broken out from D38119.
llvm-svn: 314489
Summary:
Adds a fallback mode to procmaps when the symbolizer
fails to locate a module for a given address by using
dl_iterate_phdr.
Reviewers: kubamracek, rnk, vitalybuka, eugenis
Reviewed By: eugenis
Subscribers: srhines, llvm-commits
Differential Revision: https://reviews.llvm.org/D37269
llvm-svn: 314431
dlclose itself might touch it, so better return it to the state it was
before. I don't know how to create a test for this as it would require
chaning dlclose itself.
llvm-svn: 314415
Summary:
Write out records about logged function call first arguments. D32840
implements the reading of this in llvm-xray.
Reviewers: dberris
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D32844
llvm-svn: 314378
Summary:
Link everything, including the C++ bits, in the single
ubsan_standalone SHARED library. This matches ASan setup.
Reviewers: vitalybuka
Subscribers: kubamracek, llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D38340
llvm-svn: 314369
compunit's .data section. This vector is not poisoned. Because of this the
first symbol of the following section has no left red zone. As a result, ASan
cannot detect underflow for such symbols.
Poison ASan allocated metadata, it should not be accessible to user code.
This fix does not eliminate the problem with missing left red zones but it
reduces the set of vulnerable symbols from first symbols in each input data
section to first symbols in the output section of the binary.
Differential Revision: https://reviews.llvm.org/D38056
llvm-svn: 314365
Summary:
__builtion___clear_cache maps to clear_cache function. On Linux,
clear_cache functions makes a syscall and does an abort if syscall fails.
Replace the abort by an assert so that non-debug builds do not abort
if the syscall fails.
Fixes PR34588.
Reviewers: rengolin, compnerd, srhines, peter.smith, joerg
Reviewed By: rengolin
Subscribers: aemerson, kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D37788
llvm-svn: 314322
Summary:
The current implementation of the allocator returning freed memory
back to OS (controlled by allocator_release_to_os_interval_ms flag)
requires sorting of the free chunks list, which has two major issues,
first, when free list grows to millions of chunks, sorting, even the
fastest one, is just too slow, and second, sorting chunks in place
is unacceptable for Scudo allocator as it makes allocations more
predictable and less secure.
The proposed approach is linear in complexity (altough requires quite
a bit more temporary memory). The idea is to count the number of free
chunks on each memory page and release pages containing free chunks
only. It requires one iteration over the free list of chunks and one
iteration over the array of page counters. The obvious disadvantage
is the allocation of the array of the counters, but even in the worst
case we support (4T allocator space, 64 buckets, 16 bytes bucket size,
full free list, which leads to 2 bytes per page counter and ~17M page
counters), requires just about 34Mb of the intermediate buffer (comparing
to ~64Gb of actually allocated chunks) and usually it stays under 100K
and released after each use. It is expected to be a relatively rare event,
releasing memory back to OS, keeping the buffer between those runs
and added complexity of the bookkeeping seems unnesessary here (it can
always be improved later, though, never say never).
The most interesting problem here is how to calculate the number of chunks
falling into each memory page in the bucket. Skipping all the details,
there are three cases when the number of chunks per page is constant:
1) P >= C, P % C == 0 --> N = P / C
2) C > P , C % P == 0 --> N = 1
3) C <= P, P % C != 0 && C % (P % C) == 0 --> N = P / C + 1
where P is page size, C is chunk size and N is the number of chunks per
page and the rest of the cases, where the number of chunks per page is
calculated on the go, during the page counter array iteration.
Among the rest, there are still cases where N can be deduced from the
page index, but they require not that much less calculations per page
than the current "brute force" way and 2/3 of the buckets fall into
the first three categories anyway, so, for the sake of simplicity,
it was decided to stick to those two variations. It can always be
refined and improved later, should we see that brute force way slows
us down unacceptably.
Reviewers: eugenis, cryptoad, dvyukov
Subscribers: kubamracek, mehdi_amini, llvm-commits
Differential Revision: https://reviews.llvm.org/D38245
llvm-svn: 314311
Summary:
MSR instruction in Thumb2 does not support immediate operand.
Fix this by moving the condition for V7-M to Thumb2 since V7-M support
Thumb2 only. With this change, aeabi_cfcmp.s and aeabi_cdcmp.S files can
be assembled in Thumb2 mode. (This is split out from the review D38227).
Reviewers: compnerd, peter.smith, srhines, weimingz, rengolin, kristof.beyls
Reviewed By: compnerd
Subscribers: aemerson, javed.absar, llvm-commits
Differential Revision: https://reviews.llvm.org/D38268
llvm-svn: 314284
Summary:
Align __aeabi_memclr to 4 bytes. All other ARM functions are already aligned to
4-bytes in compiler-rt.
(Split off from review D38227)
Reviewers: compnerd, peter.smith, srhines, weimingz, rengolin, kristof.beyls
Reviewed By: compnerd
Subscribers: aemerson, javed.absar, llvm-commits
Differential Revision: https://reviews.llvm.org/D38271
llvm-svn: 314255
Summary:
Previous parts: D38139, D38183.
In this part of the refactor, we abstract the Linux vs Android TSD dissociation
in favor of a Exclusive vs Shared one, allowing for easier platform introduction
and configuration.
Most of this change consist of shuffling the files around to reflect the new
organization.
We introduce `scudo_platform.h` where platform specific definition lie. This
involves the TSD model and the platform specific allocator parameters. In an
upcoming CL, those will be configurable via defines, but we currently stick
with conservative defaults.
Reviewers: alekseyshl, dvyukov
Reviewed By: alekseyshl, dvyukov
Subscribers: srhines, llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D38244
llvm-svn: 314224
Summary:
The module list should only be invalidated by dlopen and dlclose,
so the symbolizer should only re-generate it when we've hit one of those functions.
Reviewers: kubamracek, rnk, vitalybuka
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D37268
llvm-svn: 314219
Linux for mips has a non-standard layout for the kernel sigaction struct.
Adjust the layout by the minimally amount to get the test to pass, as we
don't require the usage of the restorer function.
llvm-svn: 314200
Summary:
Platforms that don't implement procmaps (primarily fuchsia and windows) still expose
the procmaps API when including sanitizer_procmaps.h, despite not implementing the functions
provided by that header. Ensure that the API is only exposed on platforms that implement it.
Reviewers: vitalybuka, alekseyshl, kubamracek
Subscribers: llvm-commits, krytarowski
Differential Revision: https://reviews.llvm.org/D38187
llvm-svn: 314149
Summary:
Following D38139, we now consolidate the TSD definition, merging the shared
TSD definition with the exclusive TSD definition. We introduce a boolean set
at initializaton denoting the need for the TSD to be unlocked or not. This
adds some unused members to the exclusive TSD, but increases consistency and
reduces the definitions fragmentation.
We remove the fallback mechanism from `scudo_allocator.cpp` and add a fallback
TSD in the non-shared version. Since the shared version doesn't require one,
this makes overall more sense.
There are a couple of additional cosmetic changes: removing the header guards
from the remaining `.inc` files, added error string to a `CHECK`.
Question to reviewers: I thought about friending `getTSDAndLock` in `ScudoTSD`
so that the `FallbackTSD` could `Mutex.Lock()` directly instead of `lock()`
which involved zeroing out the `Precedence`, which is unused otherwise. Is it
worth doing?
Reviewers: alekseyshl, dvyukov, kcc
Reviewed By: dvyukov
Subscribers: srhines, llvm-commits
Differential Revision: https://reviews.llvm.org/D38183
llvm-svn: 314110
This test can't pass on MIPS64 due to the lack of versioned interceptors
for asan and company. The interceptors bind to the earlier version of
sem_init rather than the latest version. For MIPS64el this causes an
accidental pass while MIPS64 big endian fails due reading back a
different 32bit word to what sem_init wrote when the test is corrected
to use 64bit atomics.
llvm-svn: 314100
Summary:
Part of https://github.com/google/sanitizers/issues/637
Standalone ubsan needs signal and sigaction handlers and interceptors.
Plugin mode should rely on parent tool.
Reviewers: eugenis, alekseyshl
Subscribers: kubamracek, llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D37895
llvm-svn: 314052
Summary:
We are going through an overhaul of Scudo's TSD, to allow for new platforms
to be integrated more easily, and make the code more sound.
This first part is mostly renaming, preferring some shorter names, correcting
some comments. I removed `getPrng` and `getAllocatorCache` to directly access
the members, there was not really any benefit to them (and it was suggested by
Dmitry in D37590).
The only functional change is in `scudo_tls_android.cpp`: we enforce bounds to
the `NumberOfTSDs` and most of the logic in `getTSDAndLockSlow` is skipped if we
only have 1 TSD.
Reviewers: alekseyshl, dvyukov, kcc
Reviewed By: dvyukov
Subscribers: llvm-commits, srhines
Differential Revision: https://reviews.llvm.org/D38139
llvm-svn: 313987
Don't overwrite exit code in LSan when running on top of ASan in recovery mode
to avoid breakage of users code due to found leaks.
Patch by Slava Barinov.
Differential Revision: https://reviews.llvm.org/D38026
llvm-svn: 313966
This commit annotates the block parameters of the following functions
declared in compiler-rt with 'noescape':
- dispatch_sync
- dispatch_barrier_sync
- dispatch_once
- dispatch_apply
This is needed to commit the patch that adds support for 'noescape' in
clang (see https://reviews.llvm.org/D32210) since these functions are
annotated with 'noescape' in the SDK header files.
Differential Revision: https://reviews.llvm.org/D32210
llvm-svn: 313929
Summary:
Remove dependency on std::unique_ptr<...> for the global representing
the installed XRay implementation.
Reviewers: dblaikie, kpw, pelikan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D38121
llvm-svn: 313871
Summary:
On Linux we may need preinit_array in static lib and
ubsan_standalone_initializer in shared lib.
Reviewers: eugenis
Subscribers: kubamracek, llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D38013
llvm-svn: 313851
This causes a linker error because of duplicate symbol since
ReportDeadlySignal is defined both in sanitizer_common_libcdep and
sanitizer_fuchsia.
Differential Revision: https://reviews.llvm.org/D37952
llvm-svn: 313641
Check that the symbol sets exported by the minimal runtime and the full
runtime match (making exceptions for special cases as needed).
This test uses some possibly non-standard nm options, and needs to
inspect the symbols in runtime dylibs. I haven't found a portable way to
do this, so it's limited to x86-64/Darwin for now.
llvm-svn: 313615
This eliminates a few inconsistencies between the symbol sets exported
by RTUBSan and RTUBSan_minimal:
* Handlers for nonnull_return were missing from the minimal RT, and
are now added in.
* The minimal runtime exported recoverable handlers for
builtin_unreachable and missing_return. These are not supposed to
exist, and are now removed.
llvm-svn: 313614
Summary:
With the recent move of `android_commands` to `sanitizer_common`, some things
have to be updated with regard to Scudo on Android.
Notably:
- `config.android` is dealt with in the common code
- `config.compile_wrapper` can be prepended to allow for the use of the android
commands
- `SCUDO_OPTIONS` must be passed with the environment when running a test
- `preinit.cpp` fails with some API levels, not sure why, I will have to dig
into this later.
Note that `check-scudo` is not enabled yet in the bots. It's all local testing
for now until everything looks good.
Reviewers: alekseyshl, vitalybuka
Reviewed By: vitalybuka
Subscribers: srhines, kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D37990
llvm-svn: 313561
Summary:
1. Update ubsan_interface.inc to make the test happy.
2. Switch interface_symbols_linux and interface_symbols_darwin to C++ to import __ubsan_handle_dynamic_type_cache_miss
3. Switch interface_symbols_windows to C++ for consistency.
Reviewers: rnk, zturner
Subscribers: llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D37986
llvm-svn: 313551
This should fix an issue which arises when running check-compiler-rt on
the coverage bot:
http://green.lab.llvm.org/green/job/clang-stage2-coverage-R_build/1590/
The bot doesn't build the sanitizers, but the check-compiler-rt target
always expects the profile runtime to exist.
llvm-svn: 313549
Summary:
Mark Android as supported in the cmake configuration for Scudo.
Scudo is not added yet in the Android build bots, but code builds and tests
pass locally. It is for a later CL. I also checked that Scudo builds as part
of the Android toolchain.
A few modifications had to be made:
- Android defaults to `abort_on_error=1`, which doesn't work well with the
current tests. So change the default way to pass `SCUDO_OPTIONS` to the tests
to account for this, setting it to 0 by default;
- Disable the `valloc.cpp` & `random_shuffle.cpp` tests on Android;
- There is a bit of gymnatic to be done with the `SCUDO_TEST_TARGET_ARCH`
string, due to android using the `-android` suffix, and `i686` instead of
`i386`;
- Android doesn't need `-lrt`.
Reviewers: alekseyshl, eugenis
Reviewed By: alekseyshl
Subscribers: srhines, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D37907
llvm-svn: 313538
This is used only to make fast = true in GetStackTraceWithPcBpAndContext
on SANITIZER_FREEBSD and SANITIZER_NETBSD and can be done explicitly.
llvm-svn: 313517
Summary:
This change starts differentiating tail exits from normal exits. We also
increase the version number of the "naive" log to version 2, which will
be the starting version where these records start appearing. In FDR mode
we treat the tail exits as normal exits, and are thus subject to the
same treatment with regard to record unwriting.
Updating the version number is important to signal older builds of the
llvm-xray tool that do not deal with the tail exit records must fail
early (and that users should only use the llvm-xray tool built after
the support for tail exits to get accurate handling of these records).
Depends on D37964.
Reviewers: kpw, pelikan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D37965
llvm-svn: 313515
This is a resubmission of r313270. It broke standalone builds of
compiler-rt because we were not correctly generating the llvm-lit
script in the standalone build directory.
The fixes incorporated here attempt to find llvm/utils/llvm-lit
from the source tree returned by llvm-config. If present, it
will generate llvm-lit into the output directory. Regardless,
the user can specify -DLLVM_EXTERNAL_LIT to point to a specific
lit.py on their file system. This supports the use case of
someone installing lit via a package manager. If it cannot find
a source tree, and -DLLVM_EXTERNAL_LIT is either unspecified or
invalid, then we print a warning that tests will not be able
to run.
Differential Revision: https://reviews.llvm.org/D37756
llvm-svn: 313407
This was originally broken by r258744 which introduced a weak reference
from ubsan to ubsan_cxx. This reference does not work directly on
Windows because COFF has no direct concept of weak symbols. The fix is
to use /alternatename to create a weak external reference to ubsan_cxx.
Also fix the definition (and the name, so that we drop cached values)
of the cmake flag that controls whether to build ubsan_cxx. Now the
user-controllable flag is always on, and we turn it off internally
depending on whether we support building it.
Differential Revision: https://reviews.llvm.org/D37882
llvm-svn: 313391
We now avoid using absolute symbols on Windows (D37407 and D37408),
so this should work.
Fixes PR32770.
Differential Revision: https://reviews.llvm.org/D37883
llvm-svn: 313379
This patch tackles with two issues:
Output stat st_[a|m|c]time fields were holding wrong values.
st_[a|m|c]time fields should have contained value of seconds and instead
these are filled with st_[a|m|c]time_nsec fields which hold nanoseconds.
Build fails for MIPS64 if SANITIZER_ANDROID. Recently <sys/stat.h> from
bionic introduced st_[a|m|c]time_nsec macros for compatibility with old NDKs
and those clashed with the field names of the <asm/stat.h> kernel_stat
structure.
To fix both issues and make sure sanitizer builds on all platforms, we must
un-define all compatibility macros and access the fields directly when
copying the 'time' fields.
Patch by Miodrag Dinic <miodrag.dinic@imgtec.com>
Differential Revision: https://reviews.llvm.org/D35671
llvm-svn: 313360
This patch is still breaking several multi-stage compiler-rt bots.
I already know what the fix is, but I want to get the bots green
for now and then try re-applying in the morning.
llvm-svn: 313335
It was pointed out that compiler-rt has always defined the symbol, but only
recently added it to the public headers. Meaning that libc++abi can re-declare
it instead of needing this macro.
llvm-svn: 313306
Summary:
Libc++abi attempts to use the newly added `__asan_handle_no_return()` when built under ASAN. Unfortunately older versions of compiler-rt do not provide this symbol, and so libc++abi needs a way to detect if `asan_interface.h` actually provides the function.
This patch adds the macro `SANITIZER_ASAN_INTERFACE_HAS_HANDLE_NO_RETURN` which can be used to detect the availability of the new function.
Reviewers: phosek, kcc, vitalybuka, alekseyshl
Reviewed By: phosek
Subscribers: mclow.lists, cfe-commits
Differential Revision: https://reviews.llvm.org/D37871
llvm-svn: 313303
Summary:
In a few functions (`scudoMemalign` and the like), we would call
`ScudoAllocator::FailureHandler::OnBadRequest` if the parameters didn't check
out. The issue is that if the allocator had not been initialized (eg: if this
is the first heap related function called), we would use variables like
`allocator_may_return_null` and `exitcode` that still had their default value
(as opposed to the one set by the user or the initialization path).
To solve this, we introduce `handleBadRequest` that will call `initThreadMaybe`,
allowing the options to be correctly initialized.
Unfortunately, the tests were passing because `exitcode` was still 0, so the
results looked like success. Change those tests to do what they were supposed
to.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D37853
llvm-svn: 313294
The commit did not fix the failing test and instead exposed an inconsistency
between lsan and (t|m|a)san. I'm reverting the patch as it causes more failures
and the original patch had a '||' instead of '&&', which meant that an N32 build
of test would have be incorrect w.r.t. __HAVE_64B_ATOMICS for glibc.
This reverts commit r313248.
llvm-svn: 313291
This patch simplifies LLVM's lit infrastructure by enforcing an ordering
that a site config is always run before a source-tree config.
A significant amount of the complexity from lit config files arises from
the fact that inside of a source-tree config file, we don't yet know if
the site config has been run. However it is *always* required to run
a site config first, because it passes various variables down through
CMake that the main config depends on. As a result, every config
file has to do a bunch of magic to try to reverse-engineer the location
of the site config file if they detect (heuristically) that the site
config file has not yet been run.
This patch solves the problem by emitting a mapping from source tree
config file to binary tree site config file in llvm-lit.py. Then, during
discovery when we find a config file, we check to see if we have a
target mapping for it, and if so we use that instead.
This mechanism is generic enough that it does not affect external users
of lit. They will just not have a config mapping defined, and everything
will work as normal.
On the other hand, for us it allows us to make many simplifications:
* We are guaranteed that a site config will be executed first
* Inside of a main config, we no longer have to assume that attributes
might not be present and use getattr everywhere.
* We no longer have to pass parameters such as --param llvm_site_config=<path>
on the command line.
* It is future-proof, meaning you don't have to edit llvm-lit.in to add
support for new projects.
* All of the duplicated logic of trying various fallback mechanisms of
finding a site config from the main config are now gone.
One potentially noteworthy thing that was required to implement this
change is that whereas the ninja check targets previously used the first
method to spawn lit, they now use the second. In particular, you can no
longer run lit.py against the source tree while specifying the various
`foo_site_config=<path>` parameters. Instead, you need to run
llvm-lit.py.
Differential Revision: https://reviews.llvm.org/D37756
llvm-svn: 313270
glibc changed the implementation of semaphores for glibc 2.21 requiring
some target specific changes for this compiler-rt test. Modify the test
to cope with MIPS64 and do some future/correctness work by tying the
define for MIPS64 to exactly the define of __HAVE_64B_ATOMICS in glibc.
Contributions from Nitesh Jain.
Reviewers: eugenis
Differential Revision: https://reviews.llvm.org/D37829
llvm-svn: 313248
Kuba Mracek