[TSan] Use StackTrace from sanitizer_common where applicable

Summary:
This change removes `__tsan::StackTrace` class. There are
now three alternatives:
  # Lightweight `__sanitizer::StackTrace`, which doesn't own a buffer
  of PCs. It is used in functions that need stack traces in read-only
  mode, and helps to prevent unnecessary allocations/copies (e.g.
  for StackTraces fetched from StackDepot).
  # `__sanitizer::BufferedStackTrace`, which stores buffer of PCs in
  a constant array. It is used in TraceHeader (non-Go version)
  # `__tsan::VarSizeStackTrace`, which owns buffer of PCs, dynamically
  allocated via TSan internal allocator.

Test Plan: compiler-rt test suite

Reviewers: dvyukov, kcc

Reviewed By: kcc

Subscribers: llvm-commits, kcc

Differential Revision: http://reviews.llvm.org/D6004

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@221194 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/sanitizer_common/sanitizer_stacktrace.h b/lib/sanitizer_common/sanitizer_stacktrace.h
index 4f613fad1..f31b5db00 100644
--- a/lib/sanitizer_common/sanitizer_stacktrace.h
+++ b/lib/sanitizer_common/sanitizer_stacktrace.h
@@ -64,6 +64,7 @@ struct BufferedStackTrace : public StackTrace {
 
   BufferedStackTrace() : StackTrace(trace_buffer, 0), top_frame_bp(0) {}
 
+  void Init(const uptr *pcs, uptr cnt, uptr extra_top_pc = 0);
   void Unwind(uptr max_depth, uptr pc, uptr bp, void *context, uptr stack_top,
               uptr stack_bottom, bool request_fast_unwind);
 
@@ -75,6 +76,9 @@ struct BufferedStackTrace : public StackTrace {
                                   uptr max_depth);
   void PopStackFrames(uptr count);
   uptr LocatePcInTrace(uptr pc);
+
+  BufferedStackTrace(const BufferedStackTrace &);
+  void operator=(const BufferedStackTrace &);
 };
 
 }  // namespace __sanitizer