On Darwin, we want to limit the parallelism during test execution for
sanitizer tests that use shadow memory. The reason is explained by this
existing comment:
> Only run up to 3 processes that require shadow memory simultaneously
> on 64-bit Darwin. Using more scales badly and hogs the system due to
> inefficient handling of large mmap'd regions (terabytes) by the
> kernel.
Previously we detected 3 cases:
* on-device: limit to 1 process
* 64-bit: macOS & simulators, limit to 3 processes
* others (32-bit): no limitation
We checked for the 64-bit case like this: `if arch in ['x86_64',
'x86_64h']` which misses macOS running on AS. Additionally, we don't
care about 32-bit anymore, so I've simplified this to 2 cases: on-device
and everything else.
Differential Revision: https://reviews.llvm.org/D122751
Update the hardware CRC32 logic in scudo to support using `-mcrc32`
instead of `-msse4.2`. The CRC32 intrinsics use the former flag
in the newer compiler versions, e.g. in clang since 12fa608af4.
With these compilers, passing `-msse4.2` is insufficient to enable
the instructions and causes build failures when `-march` does not enable
CRC32:
/var/tmp/portage/sys-libs/compiler-rt-sanitizers-14.0.0/work/compiler-rt/lib/scudo/scudo_crc32.cpp:20:10: error: always_inline function '_mm_crc32_u32' requires target feature 'crc32', but would be inlined into function 'computeHardwareCRC32' that is compiled without support for 'crc32'
return CRC32_INTRINSIC(Crc, Data);
^
/var/tmp/portage/sys-libs/compiler-rt-sanitizers-14.0.0/work/compiler-rt/lib/scudo/scudo_crc32.h:27:27: note: expanded from macro 'CRC32_INTRINSIC'
# define CRC32_INTRINSIC FIRST_32_SECOND_64(_mm_crc32_u32, _mm_crc32_u64)
^
/var/tmp/portage/sys-libs/compiler-rt-sanitizers-14.0.0/work/compiler-rt/lib/scudo/../sanitizer_common/sanitizer_platform.h:132:36: note: expanded from macro 'FIRST_32_SECOND_64'
# define FIRST_32_SECOND_64(a, b) (a)
^
1 error generated.
For backwards compatibility, use `-mcrc32` when available and fall back
to `-msse4.2`. The `<smmintrin.h>` header remains in use as it still
works and is compatible with GCC, while clang's `<crc32intrin.h>`
is not.
Originally reported in https://bugs.gentoo.org/835870.
Differential Revision: https://reviews.llvm.org/D122789
dd9173420f (Add clear_cache implementation for ppc64. Fix buffer to
meet ppc64 alignment., 2017-07-28), adds an implementation for
__builtin___clear_cache on powerpc64, which was promptly ammended to
also be used with big endian mode in f67036b62c (This ppc64 implementation
of clear_cache works for both big and little endian., 2017-08-02)
clang will use this implementation for it's builtin on FreeBSD and result
in an abort() in the cases where 32-bit generation was requested (ex in
macppc or when the big endian powerpc64 build was done with "-m32") and as
reported[1] recently with pcre2, but there is no reason why the same code
couldn't be used in those cases, so use instead the more generic identifier
for the PowerPC architecture.
While at it, update the comment to reflect that POWER8/9 have a 128 byte
wide cache line and so the code could instead use 64 byte windows instead
but that possible optimization has been punted for now.
[1] https://github.com/PhilipHazel/pcre2/issues/92
Reviewed By: jhibbits, #powerpc, MaskRay
Differential Revision: https://reviews.llvm.org/D122640
* Support compiling with clang-5
* Check for `LLVM_DISABLE_ASSEMBLY_FILES` and have it set by
`compiler-rt/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh`
which wants to receive and process only bitcode files.
This is a re-land of https://reviews.llvm.org/D86171 with fix.
Fuchsia's system libraries are instrumented and use the lsan
allocator for internal purposes. So leak checking needs to run
after all atexit hooks and after the system libraries' internal
exit-time hooks. The <zircon/sanitizer.h> hook API calls the
__sanitizer_process_exit_hook function at exactly the right time.
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D88248
Add include to resolve compiler warning about no previous extern declaration for non-static HashAlgorithm
Differential Revision: https://reviews.llvm.org/D122630
Compiler warns about HeaderPos possibly being uninitialized which should not be possible, but just initialize it anyway
Differential Revision: https://reviews.llvm.org/D122632
Use Fuchsia's zx_system_get_features API to determine
whether LSE atomics are available on the machine.
Reviewed By: abrachet
Differential Revision: https://reviews.llvm.org/D118839
This has never really been used in practice. Fuchsia is moving
away from the support this requires, so don't use it.
Reviewed By: phosek
Differential Revision: https://reviews.llvm.org/D122500
After landing D121813 the binary size increase introduced by this change can be minimized by using --gc-sections link options. D121813 allows each individual callbacks to be optimized out if not used.
Reviewed By: vitalybuka, MaskRay
Differential Revision: https://reviews.llvm.org/D122407
Currently, we only print how threads involved in data race are created from their parent threads.
Add a runtime flag 'print_full_thread_history' to print thread creation stacks for the threads involved in the data race and their ancestors up to the main thread.
Reviewed By: dvyukov
Differential Revision: https://reviews.llvm.org/D122131
This patch updates the existing default no-arg constructor for
MemInfoBlock to explicitly initialize all members. Also add missing
DataTypeId initialization to the other constructor. These issues were
exposed by msan on patch D121179. With this patch D121179 builds cleanly
on msan.
Reviewed By: tejohnson
Differential Revision: https://reviews.llvm.org/D122260
For errno spoiling reports we only print the stack
where the signal handler is invoked. And the top
frame is the signal handler function, which is supposed
to give the info for debugging.
But in same cases the top frame can be some common thunk,
which does not give much info. E.g. for Go/cgo it's always
runtime.cgoSigtramp.
Print the signal number.
This is what we can easily gather and it may give at least
some hints regarding the issue.
Reviewed By: melver, vitalybuka
Differential Revision: https://reviews.llvm.org/D121979
Explicitly specify the class name to avoid selecting the wrong Run function, and inherit from the correct Test parent
Differential Revision: https://reviews.llvm.org/D121854
Tests can register multiple allocators, but only the first will initialize since it initializes the TSDRegistrySharedT. Then, destruction of subsequent allocator may end up unmapping a nullptr PrimaryBase with non-zero PrimarySize.
Differential Revision: https://reviews.llvm.org/D121858
-fsanitize-memory-use-after-dtor detects memory access after a
subobject is destroyed but its memory is not yet deallocated.
This is done by poisoning each object memory near the end of its destructor.
Subobjects (members and base classes) do this in their respective
destructors, and the parent class does the same for its members with
trivial destructors.
Inexplicably, base classes with trivial destructors are not handled at
all. This change fixes this oversight by adding the base class poisoning logic
to the parent class destructor.
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D119300
After e5822ded56, the call to LargeFunction can be optimized out, as x
is never accessed in main. This is causing the test to fail, because the
out-of-bounds access won't be executed.
Adding an extra read and returning the value should prevent the
optimizer from removing the call.
glibc >= 2.33 uses shared functions for stat family functions.
D111984 added support for non-64 bit variants but they
do not appear to be enough as we have been noticing msan
errors on 64-bit stat variants on Chrome OS.
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D121652
If sanitizer cannot determine name of the module it
will use "<unknown module>". Then it can be suppressed
if needed.
Reviewed By: kda
Differential Revision: https://reviews.llvm.org/D121674
Fix darwin interface test after D121464. asan_rtl_x86_64.S is not
available on Darwin.
Reviewed By: kstoimenov
Differential Revision: https://reviews.llvm.org/D121636
Julian Lettner