As of Linux 5.10, the kernel may report either of the two following
crash reasons:
- SEGV_MTEAERR: async MTE tag check fault
- SEGV_MTESERR: sync MTE tag check fault
Teach LLDB about them.
Differential Revision: https://reviews.llvm.org/D93495
Summary:
A *.cpp file header in LLDB (and in LLDB) should like this:
```
//===-- TestUtilities.cpp -------------------------------------------------===//
```
However in LLDB most of our source files have arbitrary changes to this format and
these changes are spreading through LLDB as folks usually just use the existing
source files as templates for their new files (most notably the unnecessary
editor language indicator `-*- C++ -*-` is spreading and in every review
someone is pointing out that this is wrong, resulting in people pointing out that this
is done in the same way in other files).
This patch removes most of these inconsistencies including the editor language indicators,
all the different missing/additional '-' characters, files that center the file name, missing
trailing `===//` (mostly caused by clang-format breaking the line).
Reviewers: aprantl, espindola, jfb, shafik, JDevlieghere
Reviewed By: JDevlieghere
Subscribers: dexonsmith, wuzish, emaste, sdardis, nemanjai, kbarton, MaskRay, atanasyan, arphaman, jfb, abidh, jsji, JDevlieghere, usaxena95, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D73258
echo -e '#include <unistd.h>\nint main(void){\nsync();return 0;}'|./bin/clang -g -x c -;./bin/lldb -o 'file ./a.out' -o 'b main' -o r -o 'p (void)sync()'
Actual:
error: Expression can't be run, because there is no JIT compiled function
Expected:
<nothing, sync() has been executed>
This patch has been checked by:
D71707: clang-tidy: new bugprone-pointer-cast-widening
https://reviews.llvm.org/D71707
Casting from 32-bit `void *` to `uint64_t` requires an intermediate `uintptr_t` cast otherwise the pointer gets sign-extended:
echo -e '#include <stdio.h>\n#include <stdint.h>\nint main(void){void *p=(void *)0x80000000;unsigned long long ull=(unsigned long long)p;unsigned long long ull2=(unsigned long
long)(uintptr_t)p;printf("p=%p ull=0x%llx ull2=0x%llx\\n",p,ull,ull2);return 0;}'|gcc -Wall -m32 -x c -;./a.out
<stdin>: In function ‘main’:
<stdin>:3:66: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
p=0x80000000 ull=0xffffffff80000000 ull2=0x80000000
With debug output:
Actual:
IRMemoryMap::WriteMemory (0xb6ff8640, 0xffffffffb6f82158, 0x112) went to [0xb6ff8640..0xb6ff86b3)
Code can be run in the target.
Found function, has local address 0xffffffffb6f84000 and remote address 0xffffffffffffffff
Couldn't disassemble function : Couldn't find code range for function _Z12$__lldb_exprPv
Sections:
[0xb6f84000+0x3c]->0xb6ff9020 (alignment 4, section ID 0, name .text)
...
HandleCommand, command did not succeed
error: Expression can't be run, because there is no JIT compiled function
Expected:
IRMemoryMap::WriteMemory (0xb6ff8640, 0xb6faa15c, 0x128) went to [0xb6ff8640..0xb6ff86c3)
IRExecutionUnit::GetRemoteAddressForLocal() found 0xb6fac000 in [0xb6fac000..0xb6fac040], and returned 0xb6ff9020 from [0xb6ff9020..0xb6ff9060].
Code can be run in the target.
Found function, has local address 0xb6fac000 and remote address 0xb6ff9020
Function's code range is [0xb6ff9020+0x40]
...
Function data has contents:
0xb6ff9020: 10 4c 2d e9 08 b0 8d e2 08 d0 4d e2 00 40 a0 e1
...
Function disassembly:
0xb6ff9020: 0xe92d4c10 push {r4, r10, r11, lr}
Differential revision: https://reviews.llvm.org/D71498
Summary:
With the XCode project gone, there doesn't seem to be anything setting
this macro anymore -- and the macro wasn't doing much anyway.
Reviewers: jingham, sgraenitz
Subscribers: emaste, lldb-commits
Differential Revision: https://reviews.llvm.org/D66742
llvm-svn: 371018
to reflect the new license.
We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.
Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.
llvm-svn: 351636
This is intended as a clean up after the big clang-format commit
(r280751), which unfortunately resulted in many of the comment
paragraphs in LLDB being very hard to read.
FYI, the script I used was:
import textwrap
import commands
import os
import sys
import re
tmp = "%s.tmp"%sys.argv[1]
out = open(tmp, "w+")
with open(sys.argv[1], "r") as f:
header = ""
text = ""
comment = re.compile(r'^( *//) ([^ ].*)$')
special = re.compile(r'^((([A-Z]+[: ])|([0-9]+ )).*)|(.*;)$')
for line in f:
match = comment.match(line)
if match and not special.match(match.group(2)):
# skip intentionally short comments.
if not text and len(match.group(2)) < 40:
out.write(line)
continue
if text:
text += " " + match.group(2)
else:
header = match.group(1)
text = match.group(2)
continue
if text:
filled = textwrap.wrap(text, width=(78-len(header)),
break_long_words=False)
for l in filled:
out.write(header+" "+l+'\n')
text = ""
out.write(line)
os.rename(tmp, sys.argv[1])
Differential Revision: https://reviews.llvm.org/D46144
llvm-svn: 331197
Summary: QPassSignals package allows lldb client to tell lldb-server to ignore certain types of signals and re-inject them back to inferior without stopping execution.
Reviewers: jmajors, labath
Subscribers: danalbert, srhines, emaste, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D30286
Author: Eugene Zemtsov <ezemtsov@google.com>
llvm-svn: 296101
Summary:
This patch adds support for handling the SIGSEGV signal with 'si_code ==
SEGV_BNDERR', which is thrown when a bound violation is caught by the
Intel(R) MPX technology.
Differential Revision: https://reviews.llvm.org/D25329
llvm-svn: 283474
*** to conform to clang-format’s LLVM style. This kind of mass change has
*** two obvious implications:
Firstly, merging this particular commit into a downstream fork may be a huge
effort. Alternatively, it may be worth merging all changes up to this commit,
performing the same reformatting operation locally, and then discarding the
merge for this particular commit. The commands used to accomplish this
reformatting were as follows (with current working directory as the root of
the repository):
find . \( -iname "*.c" -or -iname "*.cpp" -or -iname "*.h" -or -iname "*.mm" \) -exec clang-format -i {} +
find . -iname "*.py" -exec autopep8 --in-place --aggressive --aggressive {} + ;
The version of clang-format used was 3.9.0, and autopep8 was 1.2.4.
Secondly, “blame” style tools will generally point to this commit instead of
a meaningful prior commit. There are alternatives available that will attempt
to look through this change and find the appropriate prior commit. YMMV.
llvm-svn: 280751
Summary:
Linux and FreeBSD occasionally send SI_KERNEL codes, nonexistent on other platforms.
Problem caught on NetBSD.
Reviewers: joerg, sas
Subscribers: sas, lldb-commits, emaste
Differential Revision: http://reviews.llvm.org/D12659
Change by Kamil Rytarowski <n54@gmx.com>
llvm-svn: 247579
Summary:
Previously, we reported inferior receiving SIGSEGV (or SIGILL, SIGFPE, SIGBUS) as an "exception"
to LLDB, presumably to match OSX behaviour. Beside the fact that we were basically lying to the
user, this was also causing problems with inferiors which handle SIGSEGV by themselves, since
LLDB was unable to reinject this signal back into the inferior.
This commit changes LLGS to report SIGSEGV as a signal. This has necessitated some changes in the
test-suite, which had previously used eStopReasonException to locate threads that crashed. Now it
uses platform-specific logic, which in the case of linux searches for eStopReasonSignaled with
signal=SIGSEGV.
I have also added the ability to set the description of StopInfoUnixSignal using the description
field of the gdb-remote packet. The linux stub uses this to display additional information about
the segfault (invalid address, address access protected, etc.).
Test Plan: All tests pass on linux and osx.
Reviewers: ovyalov, clayborg, emaste
Subscribers: emaste, lldb-commits
Differential Revision: http://reviews.llvm.org/D10057
llvm-svn: 238549
Peter Collingbourne