[compiler-rt] r221520 - [sanitizer] Never remove the last frame off the stack trace.

[Evgeniy Stepanov]

Author: eugenis
Date: Fri Nov  7 06:03:07 2014
New Revision: 221520

URL: http://llvm.org/viewvc/llvm-project?rev=221520&view=rev
Log:
[sanitizer] Never remove the last frame off the stack trace.

It can only make it worse.

Modified:
    compiler-rt/trunk/lib/sanitizer_common/sanitizer_unwind_posix_libcdep.cc

Modified: compiler-rt/trunk/lib/sanitizer_common/sanitizer_unwind_posix_libcdep.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/sanitizer_common/sanitizer_unwind_posix_libcdep.cc?rev=221520&r1=221519&r2=221520&view=diff
==============================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_unwind_posix_libcdep.cc (original)
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_unwind_posix_libcdep.cc Fri Nov  7 06:03:07 2014
@@ -116,7 +116,7 @@ void BufferedStackTrace::SlowUnwindStack
   // We need to pop a few frames so that pc is on top.
   uptr to_pop = LocatePcInTrace(pc);
   // trace_buffer[0] belongs to the current function so we always pop it.
-  if (to_pop == 0)
+  if (to_pop == 0 && size > 1)
     to_pop = 1;
   PopStackFrames(to_pop);
   trace_buffer[0] = pc;