Dump stack trace on segfault in the VM.

runtime/vm/profiler.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_PROFILER_H_
 #define RUNTIME_VM_PROFILER_H_
 
 #include "vm/allocation.h"
 #include "vm/bitfield.h"
 #include "vm/code_observers.h"
@@ skipping 36 matching lines @@
 class Profiler : public AllStatic {
  public:
   static void InitOnce();
   static void Shutdown();
 
   static void SetSampleDepth(intptr_t depth);
   static void SetSamplePeriod(intptr_t period);
 
   static SampleBuffer* sample_buffer() { return sample_buffer_; }
 
+  static void DumpStackTrace(void* context);
   static void DumpStackTrace(bool native_stack_trace = true);
 
   static void SampleAllocation(Thread* thread, intptr_t cid);
 
   // SampleThread is called from inside the signal handler and hence it is very
   // critical that the implementation of SampleThread does not do any of the
   // following:
   //   * Accessing TLS -- Because on Windows the callback will be running in a
   //                      different thread.
   //   * Allocating memory -- Because this takes locks which may already be
   //                          held, resulting in a dead lock.
   //   * Taking a lock -- See above.
   static void SampleThread(Thread* thread, const InterruptedThreadState& state);
 
   static ProfilerCounters counters() {
     // Copies the counter values.
     return counters_;
   }
 
  private:
+  static void DumpStackTrace(bool native_stack_trace,
+                             uword sp,
+                             uword fp,
+                             uword pc);
+
   // Does not walk the thread's stack.
   static void SampleThreadSingleFrame(Thread* thread, uintptr_t pc);
   static bool initialized_;
 
   static SampleBuffer* sample_buffer_;
 
   static ProfilerCounters counters_;
 
   friend class Thread;
 };
@@ skipping 519 matching lines @@
  private:
   ZoneGrowableArray<ProcessedSample*> samples_;
   CodeLookupTable* code_lookup_table_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessedSampleBuffer);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_PROFILER_H_