================
@@ -864,11 +864,18 @@ INTERCEPTOR(void *, pvalloc, size_t size) {
#define RTSAN_MAYBE_INTERCEPT_PVALLOC
#endif
+#if !SANITIZER_FREEBSD
+// enabling this interception on freebsd leads to infinite recursion
+// on pthread lib initialization
----------------
davidtrevelyan wrote:
@devnexen sorry - I meant the other end of the stack, not the point at which
the segfault happens. Could you set a breakpoint in `pthread_once`, maybe, and
share the backtrace again, so we can see the full initiating function call
stack?
This is what I mean:
```lldb
⏺ build ❯ lldb ./projects/compiler-rt/lib/rtsan/tests/Rtsan-arm64-Test
(lldb) target create "./projects/compiler-rt/lib/rtsan/tests/Rtsan-arm64-Test"
Current executable set to
'/Users/david/Repositories/rtsan/llvm-project/build/projects/compiler-rt/lib/rtsan/tests/Rtsan-arm64-Test'
(arm64).
(lldb) br se -n pthread_once
Breakpoint 1: where = libsystem_pthread.dylib`pthread_once, address =
0x000000018044aff4
(lldb) pr la
Process 67543 launched:
'/Users/david/Repositories/rtsan/llvm-project/build/projects/compiler-rt/lib/rtsan/tests/Rtsan-arm64-Test'
(arm64)
Process 67543 stopped
* thread #1, stop reason = breakpoint 1.1
frame #0: 0x000000018d10eff4 libsystem_pthread.dylib`pthread_once
libsystem_pthread.dylib`pthread_once:
-> 0x18d10eff4 <+0>: pacibsp
0x18d10eff8 <+4>: sub sp, sp, #0x40
0x18d10effc <+8>: stp x22, x21, [sp, #0x10]
0x18d10f000 <+12>: stp x20, x19, [sp, #0x20]
Target 0: (Rtsan-arm64-Test) stopped.
(lldb) bt
* thread #1, stop reason = breakpoint 1.1
* frame #0: 0x000000018d10eff4 libsystem_pthread.dylib`pthread_once
frame #1: 0x00000001002958b4
libclang_rt.rtsan_osx_dynamic.dylib`__rtsan::GetContextForThisThread()
[inlined] GetContextForThisThreadImpl() at rtsan_context.cpp:34:3 [opt]
frame #2: 0x00000001002958a0
libclang_rt.rtsan_osx_dynamic.dylib`__rtsan::GetContextForThisThread() at
rtsan_context.cpp:62:10 [opt]
frame #3: 0x000000010029545c
libclang_rt.rtsan_osx_dynamic.dylib`__rtsan_notify_intercepted_call(func_name="shm_open")
at rtsan.cpp:140:21 [opt]
frame #4: 0x0000000100297364
libclang_rt.rtsan_osx_dynamic.dylib`wrap_shm_open(name="com.apple.featureflags.shm",
oflag=0, mode=16832) at rtsan_interceptors_posix.cpp:973:3 [opt]
frame #5: 0x000000018cfa41e8
libsystem_featureflags.dylib`_os_feature_table_once + 40
frame #6: 0x000000018d1455e0 libsystem_platform.dylib`_os_once_callout + 32
frame #7: 0x000000018cfa41bc libsystem_featureflags.dylib`_os_feature_table
+ 80
frame #8: 0x000000018cfa51cc
libsystem_featureflags.dylib`_os_feature_enabled_simple_impl + 44
frame #9: 0x000000018cf29a10 libsystem_malloc.dylib`__malloc_init + 104
frame #10: 0x000000019abd2604 libSystem.B.dylib`libSystem_initializer + 204
frame #11: 0x000000018cda7d54 dyld`invocation function for block in
dyld4::Loader::findAndRunAllInitializers(dyld4::RuntimeState&) const + 276
frame #12: 0x000000018cde64d0 dyld`invocation function for block in
dyld3::MachOAnalyzer::forEachInitializer(Diagnostics&,
dyld3::MachOAnalyzer::VMAddrConverter const&, void (unsigned int)
block_pointer, void const*) const + 340
frame #13: 0x000000018cdd9c38 dyld`invocation function for block in
dyld3::MachOFile::forEachSection(void (dyld3::MachOFile::SectionInfo const&,
bool, bool&) block_pointer) const + 496
frame #14: 0x000000018cd8c2dc
dyld`dyld3::MachOFile::forEachLoadCommand(Diagnostics&, void (load_command
const*, bool&) block_pointer) const + 300
frame #15: 0x000000018cdd8bcc dyld`dyld3::MachOFile::forEachSection(void
(dyld3::MachOFile::SectionInfo const&, bool, bool&) block_pointer) const + 192
frame #16: 0x000000018cde5fe4
dyld`dyld3::MachOAnalyzer::forEachInitializer(Diagnostics&,
dyld3::MachOAnalyzer::VMAddrConverter const&, void (unsigned int)
block_pointer, void const*) const + 516
frame #17: 0x000000018cda7bb4
dyld`dyld4::Loader::findAndRunAllInitializers(dyld4::RuntimeState&) const + 176
frame #18: 0x000000018cdb2be8
dyld`dyld4::PrebuiltLoader::runInitializers(dyld4::RuntimeState&) const + 44
frame #19: 0x000000018cdc78b8 dyld`dyld4::APIs::runAllInitializersForMain()
+ 84
frame #20: 0x000000018cd918c8 dyld`dyld4::prepare(dyld4::APIs&,
dyld3::MachOAnalyzer const*) + 3268
frame #21: 0x000000018cd90bc0 dyld`dyld4::start(dyld4::KernelArgs*, void*,
void*)::$_0::operator()() const + 544
frame #22: 0x000000018cd9005c dyld`start + 2304
```
https://github.com/llvm/llvm-project/pull/125389
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