daltenty wrote:
This is breaking a number of tests for the UBSAN on AIX, the traceback produced
by the runtime are no longer correct.
Before this change:
```
UndefinedBehaviorSanitizer:DEADLYSIGNAL
==52887862==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address
0x00000000 (pc 0x10000784 bp 0x2ff22020 sp 0x2ff22020 T59639729)
==52887862==The signal is caused by a UNKNOWN memory access.
==52887862==Hint: address points to the zero page.
#0 0x10000784 in .void Xyz::Abc<int, int>()
/home/daltenty/llvm/dev/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/dedup_token_length_test.cpp:20
#1 0x1000073c in .bar
/home/daltenty/llvm/dev/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/dedup_token_length_test.cpp:25
#2 0x100007cc in .FOO()
/home/daltenty/llvm/dev/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/dedup_token_length_test.cpp:29
#3 0x10000834 in .main
/home/daltenty/llvm/dev/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/dedup_token_length_test.cpp:33
#4 0x100002d0 in .__start
(/home/daltenty/llvm/dev/build/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/ubsan-powerpc-AIX/Posix/Output/dedup_token_length_test.cpp.tmp+0x100002d0)
DEDUP_TOKEN: .void Xyz::Abc<int, int>()--.bar
UndefinedBehaviorSanitizer can not provide additional info.
SUMMARY: UndefinedBehaviorSanitizer: SEGV
/home/daltenty/llvm/dev/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/dedup_token_length_test.cpp:20
in .void Xyz::Abc<int, int>()
==52887862==ABORTING
```
After:
```
UndefinedBehaviorSanitizer:DEADLYSIGNAL
==1704572==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address
0x00000000 (pc 0x10000784 bp 0x2ff221b0 sp 0x2ff221b0 T56035233)
==1704572==The signal is caused by a UNKNOWN memory access.
==1704572==Hint: address points to the zero page.
#0 0x10000784 in .void Xyz::Abc<int, int>()
/home/daltenty/llvm/dev/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/dedup_token_length_test.cpp:20
#1 0x1001d764 in .ubsan_GetStackTrace(__sanitizer::BufferedStackTrace*,
unsigned int, unsigned int, unsigned int, void*, bool)
/home/daltenty/llvm/dev/llvm-project/compiler-rt/lib/ubsan/ubsan_diag.cpp:41
#2 0x10025ca4 in .__ubsan::OnStackUnwind(__sanitizer::SignalContext const&,
void const*, __sanitizer::BufferedStackTrace*)
/home/daltenty/llvm/dev/llvm-project/compiler-rt/lib/ubsan/ubsan_signals_standalone.cpp:53
#3 0x1001cd10 in ReportDeadlySignalImpl
/home/daltenty/llvm/dev/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_report.cpp:272
#4 0x1001cd10 in
.__sanitizer::ReportDeadlySignal(__sanitizer::SignalContext const&, unsigned
int, void (*)(__sanitizer::SignalContext const&, void const*,
__sanitizer::BufferedStackTrace*), void const*)
/home/daltenty/llvm/dev/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_report.cpp:286
#5 0x1001d2d4 in .__sanitizer::HandleDeadlySignal(void*, void*, unsigned
int, void (*)(__sanitizer::SignalContext const&, void const*,
__sanitizer::BufferedStackTrace*), void const*)
/home/daltenty/llvm/dev/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_report.cpp:295
DEDUP_TOKEN: .void Xyz::Abc<int,
int>()--.ubsan_GetStackTrace(__sanitizer::BufferedStackTrace*, unsigned int,
unsigned int, unsigned int, void*, bool)
UndefinedBehaviorSanitizer can not provide additional info.
SUMMARY: UndefinedBehaviorSanitizer: SEGV
/home/daltenty/llvm/dev/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/dedup_token_length_test.cpp:20
in .void Xyz::Abc<int, int>()
==1704572==ABORTING
```
https://github.com/llvm/llvm-project/pull/92291
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