search for: asan2

...t;libunwind::LocalAddressSpace>::stepWithCompactEncoding () #2 0x00007fff8d7322e1 in libunwind::UnwindCursor<libunwind::LocalAddressSpace, libunwind::Registers_x86_64>::step () #3 0x00007fff8d736262 in _Unwind_Backtrace () #4 0x000000010004a17c in SlowUnwindStack () at /Users/glider/src/asan2/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_unwind.cc:116 I've inserted a debug printf into the callback passed to _Unwind_Backtrace (note the "got pc" lines above) and can see that _Unwind_Backtrace correctly finds the address of the function that calls SlowUnwindStack...