Add flag to print stack-trace after n allocations.

src/heap/heap-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_HEAP_INL_H_
 #define V8_HEAP_HEAP_INL_H_
 
 #include <cmath>
 
 #include "src/base/platform/platform.h"
@@ skipping 195 matching lines @@
   return allocation;
 }
 
 
 void Heap::OnAllocationEvent(HeapObject* object, int size_in_bytes) {
   HeapProfiler* profiler = isolate_->heap_profiler();
   if (profiler->is_tracking_allocations()) {
     profiler->AllocationEvent(object->address(), size_in_bytes);
   }
 
+  ++allocations_count_;
+
   if (FLAG_verify_predictable) {
-    ++allocations_count_;
-
     UpdateAllocationsHash(object);
     UpdateAllocationsHash(size_in_bytes);
 
     if ((FLAG_dump_allocations_digest_at_alloc > 0) &&
         (--dump_allocations_hash_countdown_ == 0)) {
       dump_allocations_hash_countdown_ = FLAG_dump_allocations_digest_at_alloc;
       PrintAlloctionsHash();
     }
   }
+
+  if (FLAG_trace_allocation_stack_interval > 0) {
+    if (allocations_count_ % FLAG_trace_allocation_stack_interval == 0) {
+      isolate()->PrintStack(stdout, Isolate::kPrintStackConcise);
+    }
+  }
 }
 
 
 void Heap::OnMoveEvent(HeapObject* target, HeapObject* source,
                        int size_in_bytes) {
   HeapProfiler* heap_profiler = isolate_->heap_profiler();
   if (heap_profiler->is_tracking_object_moves()) {
     heap_profiler->ObjectMoveEvent(source->address(), target->address(),
                                    size_in_bytes);
   }
@@ skipping 443 matching lines @@
 
 void VerifySmisVisitor::VisitPointers(Object** start, Object** end) {
   for (Object** current = start; current < end; current++) {
     CHECK((*current)->IsSmi());
   }
 }
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_HEAP_INL_H_