From 5d53e050cad7ec642bdff57222708f733e94f4e2 Mon Sep 17 00:00:00 2001
From: Vitaly Buka <vitalybuka@google.com>
Date: Thu, 14 Sep 2017 03:06:35 +0000
Subject: [PATCH] [sanitizer] Add BufferedStackTrace::Reset()

llvm-svn: 313226
---
 compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h
index 90142dffd5e4..f15196e4b725 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h
@@ -97,6 +97,11 @@ struct BufferedStackTrace : public StackTrace {
   void Unwind(u32 max_depth, uptr pc, uptr bp, void *context, uptr stack_top,
               uptr stack_bottom, bool request_fast_unwind);
 
+  void Reset() {
+    *static_cast<StackTrace *>(this) = StackTrace(trace_buffer, 0);
+    top_frame_bp = 0;
+  }
+
  private:
   void FastUnwindStack(uptr pc, uptr bp, uptr stack_top, uptr stack_bottom,
                        u32 max_depth);
@@ -106,8 +111,8 @@ struct BufferedStackTrace : public StackTrace {
   void PopStackFrames(uptr count);
   uptr LocatePcInTrace(uptr pc);
 
-  BufferedStackTrace(const BufferedStackTrace &);
-  void operator=(const BufferedStackTrace &);
+  BufferedStackTrace(const BufferedStackTrace &) = delete;
+  void operator=(const BufferedStackTrace &) = delete;
 };
 
 // Check if given pointer points into allocated stack area.