[compiler-rt] Dump regs fbsd fix (PR #99676)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux` running on `sanitizer-buildbot2` while building `compiler-rt` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/66/builds/1854

Here is the relevant piece of the build log for the reference:
```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
[366/371] Generating MSAN_INST_GTEST.gtest-all.cc.x86_64.o
[367/371] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.x86_64-with-call.o
[368/371] Generating Msan-x86_64-with-call-Test
[369/371] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.x86_64.o
[370/371] Generating Msan-x86_64-Test
[370/371] Running compiler_rt regression tests
llvm-lit: /b/sanitizer-x86_64-linux/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 10039 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
TIMEOUT: SanitizerCommon-hwasan-x86_64-Linux :: Posix/fork_threaded.c (10039 of 10039)
******************** TEST 'SanitizerCommon-hwasan-x86_64-Linux :: Posix/fork_threaded.c' FAILED ********************
Exit Code: -9
Timeout: Reached timeout of 900 seconds

Command Output (stderr):
--
RUN: at line 1: /b/sanitizer-x86_64-linux/build/build_default/./bin/clang  -gline-tables-only -fsanitize=hwaddress -fuse-ld=lld -fsanitize-hwaddress-experimental-aliasing  -m64 -funwind-tables  -I/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test -ldl -O0 /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/fork_threaded.c -o /b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp && env HWASAN_OPTIONS=die_after_fork=0  /b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
+ /b/sanitizer-x86_64-linux/build/build_default/./bin/clang -gline-tables-only -fsanitize=hwaddress -fuse-ld=lld -fsanitize-hwaddress-experimental-aliasing -m64 -funwind-tables -I/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test -ldl -O0 /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/fork_threaded.c -o /b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
+ env HWASAN_OPTIONS=die_after_fork=0 /b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
==890072==ERROR: HWAddressSanitizer: tag-mismatch on address 0x581400005140 at pc 0x64a1d6163df7
READ of size 155 at 0x581400005140 tags: 05/00 (ptr/mem) in thread T0

=================================================================
==889718==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 568 byte(s) in 3 object(s) allocated from:
    #0 0x64a1d6158528 in malloc /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:151:3
    #1 0x64a1d62b047e in operator new(unsigned long) llvm-link
    #2 0x64a1d614ea14 in _start (/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp+0xeea14)

Direct leak of 204 byte(s) in 1 object(s) allocated from:
    #0 0x64a1d615806d in calloc /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:127:3
    #1 0x64a1d6238f8d in llvm::safe_calloc(unsigned long, unsigned long) llvm-link
    #2 0x64a1d614ea14 in _start (/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp+0xeea14)

Indirect leak of 1752 byte(s) in 42 object(s) allocated from:
    #0 0x64a1d6157a29 in aligned_alloc /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:58:3
    #1 0x64a1d6246897 in llvm::allocate_buffer(unsigned long, unsigned long) llvm-link

Indirect leak of 780 byte(s) in 1 object(s) allocated from:
    #0 0x64a1d615806d in calloc /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:127:3
    #1 0x64a1d6238f8d in llvm::safe_calloc(unsigned long, unsigned long) llvm-link

Indirect leak of 160 byte(s) in 1 object(s) allocated from:
    #0 0x64a1d6158528 in malloc /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:151:3
    #1 0x64a1d62b047e in operator new(unsigned long) llvm-link
    #2 0x64a1d614ea14 in _start (/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp+0xeea14)

SUMMARY: HWAddressSanitizer: 3464 byte(s) leaked in 48 allocation(s).
Step 9 (test compiler-rt symbolizer) failure: test compiler-rt symbolizer (failure)
...
[366/371] Generating MSAN_INST_GTEST.gtest-all.cc.x86_64.o
[367/371] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.x86_64-with-call.o
[368/371] Generating Msan-x86_64-with-call-Test
[369/371] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.x86_64.o
[370/371] Generating Msan-x86_64-Test
[370/371] Running compiler_rt regression tests
llvm-lit: /b/sanitizer-x86_64-linux/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 10039 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
TIMEOUT: SanitizerCommon-hwasan-x86_64-Linux :: Posix/fork_threaded.c (10039 of 10039)
******************** TEST 'SanitizerCommon-hwasan-x86_64-Linux :: Posix/fork_threaded.c' FAILED ********************
Exit Code: -9
Timeout: Reached timeout of 900 seconds

Command Output (stderr):
--
RUN: at line 1: /b/sanitizer-x86_64-linux/build/build_default/./bin/clang  -gline-tables-only -fsanitize=hwaddress -fuse-ld=lld -fsanitize-hwaddress-experimental-aliasing  -m64 -funwind-tables  -I/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test -ldl -O0 /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/fork_threaded.c -o /b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp && env HWASAN_OPTIONS=die_after_fork=0  /b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
+ /b/sanitizer-x86_64-linux/build/build_default/./bin/clang -gline-tables-only -fsanitize=hwaddress -fuse-ld=lld -fsanitize-hwaddress-experimental-aliasing -m64 -funwind-tables -I/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test -ldl -O0 /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/fork_threaded.c -o /b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
+ env HWASAN_OPTIONS=die_after_fork=0 /b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
==890072==ERROR: HWAddressSanitizer: tag-mismatch on address 0x581400005140 at pc 0x64a1d6163df7
READ of size 155 at 0x581400005140 tags: 05/00 (ptr/mem) in thread T0

=================================================================
==889718==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 568 byte(s) in 3 object(s) allocated from:
    #0 0x64a1d6158528 in malloc /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:151:3
    #1 0x64a1d62b047e in operator new(unsigned long) llvm-link
    #2 0x64a1d614ea14 in _start (/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp+0xeea14)

Direct leak of 204 byte(s) in 1 object(s) allocated from:
    #0 0x64a1d615806d in calloc /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:127:3
    #1 0x64a1d6238f8d in llvm::safe_calloc(unsigned long, unsigned long) llvm-link
    #2 0x64a1d614ea14 in _start (/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp+0xeea14)

Indirect leak of 1752 byte(s) in 42 object(s) allocated from:
    #0 0x64a1d6157a29 in aligned_alloc /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:58:3
    #1 0x64a1d6246897 in llvm::allocate_buffer(unsigned long, unsigned long) llvm-link

Indirect leak of 780 byte(s) in 1 object(s) allocated from:
    #0 0x64a1d615806d in calloc /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:127:3
    #1 0x64a1d6238f8d in llvm::safe_calloc(unsigned long, unsigned long) llvm-link

Indirect leak of 160 byte(s) in 1 object(s) allocated from:
    #0 0x64a1d6158528 in malloc /b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:151:3
    #1 0x64a1d62b047e in operator new(unsigned long) llvm-link
    #2 0x64a1d614ea14 in _start (/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp+0xeea14)

SUMMARY: HWAddressSanitizer: 3464 byte(s) leaked in 48 allocation(s).

```

https://github.com/llvm/llvm-project/pull/99676