Updated MallocHooks to collect stack traces when memory is allocated.

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 40 matching lines @@
 
   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();
 
   static void SampleAllocation(Thread* thread, intptr_t cid);
+  static Sample* NativeSampleAllocation();

[Cutch, 2017/02/08 00:28:54]

SampleNativeAllocation

[bkonyi, 2017/02/08 01:37:05]

Done.

 
   // 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);
@@ skipping 190 matching lines @@
   }
 
   bool is_allocation_sample() const {
     return ClassAllocationSampleBit::decode(state_);
   }
 
   void set_is_allocation_sample(bool allocation_sample) {
     state_ = ClassAllocationSampleBit::update(allocation_sample, state_);
   }
 
+  bool is_native_allocation_sample() const {
+    return NativeAllocationSampleBit::decode(state_);
+  }
+
+  void set_is_native_allocation_sample(bool native_allocation_sample) {
+    state_ =
+        NativeAllocationSampleBit::update(native_allocation_sample, state_);
+  }
+
   Thread::TaskKind thread_task() const { return ThreadTaskBit::decode(state_); }
 
   void set_thread_task(Thread::TaskKind task) {
     state_ = ThreadTaskBit::update(task, state_);
   }
 
   bool is_continuation_sample() const {
     return ContinuationSampleBit::decode(state_);
   }
 
@@ skipping 43 matching lines @@
   enum StateBits {
     kHeadSampleBit = 0,
     kLeafFrameIsDartBit = 1,
     kIgnoreBit = 2,
     kExitFrameBit = 3,
     kMissingFrameInsertedBit = 4,
     kTruncatedTraceBit = 5,
     kClassAllocationSampleBit = 6,
     kContinuationSampleBit = 7,
     kThreadTaskBit = 8,  // 5 bits.
-    kNextFreeBit = 13,
+    kNativeAllocationSampleBit = 13,
+    kNextFreeBit = 14,
   };
   class HeadSampleBit : public BitField<uword, bool, kHeadSampleBit, 1> {};
   class LeafFrameIsDart : public BitField<uword, bool, kLeafFrameIsDartBit, 1> {
   };
   class IgnoreBit : public BitField<uword, bool, kIgnoreBit, 1> {};
   class ExitFrameBit : public BitField<uword, bool, kExitFrameBit, 1> {};
   class MissingFrameInsertedBit
       : public BitField<uword, bool, kMissingFrameInsertedBit, 1> {};
   class TruncatedTraceBit
       : public BitField<uword, bool, kTruncatedTraceBit, 1> {};
   class ClassAllocationSampleBit
       : public BitField<uword, bool, kClassAllocationSampleBit, 1> {};
+  class NativeAllocationSampleBit
+      : public BitField<uword, bool, kNativeAllocationSampleBit, 1> {};
   class ContinuationSampleBit
       : public BitField<uword, bool, kContinuationSampleBit, 1> {};
   class ThreadTaskBit
       : public BitField<uword, Thread::TaskKind, kThreadTaskBit, 5> {};
 
   int64_t timestamp_;
   ThreadId tid_;
   Isolate* isolate_;
   uword pc_marker_;
   uword stack_buffer_[kStackBufferSizeInWords];
@@ skipping 252 matching lines @@
  private:
   ZoneGrowableArray<ProcessedSample*> samples_;
   CodeLookupTable* code_lookup_table_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessedSampleBuffer);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_PROFILER_H_