Provide a mechanism for dumping of heap profiles on predefined events.

runtime/vm/heap.cc

 // Copyright (c) 2012, 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.
 
 #include "vm/heap.h"
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/flags.h"
 #include "vm/heap_profiler.h"
@@ skipping 268 matching lines @@
   HeapProfilerWeakRootVisitor weak_root_visitor(&root_visitor);
   isolate->VisitWeakPersistentHandles(&weak_root_visitor, true);
 
   // Dump the current and VM isolate heaps.
   HeapProfilerObjectVisitor object_visitor(isolate, &profiler);
   isolate->heap()->IterateObjects(&object_visitor);
   vm_isolate->heap()->IterateObjects(&object_visitor);
 }
 
 
+void Heap::ProfileToFile(const char* reason) const {
+  Dart_FileOpenCallback file_open = Isolate::file_open_callback();
+  ASSERT(file_open != NULL);
+  Dart_FileWriteCallback file_write = Isolate::file_write_callback();
+  ASSERT(file_write != NULL);
+  Dart_FileCloseCallback file_close = Isolate::file_close_callback();
+  ASSERT(file_close != NULL);
+  Isolate* isolate = Isolate::Current();
+  const char* format = "%s-%s.hprof";
+  intptr_t len = OS::SNPrint(NULL, 0, format, isolate->name(), reason);
+  char* filename = isolate->current_zone()->Alloc<char>(len + 1);
+  OS::SNPrint(filename, len + 1, format, isolate->name(), reason);
+  void* file = (*file_open)(filename);
+  if (file != NULL) {
+    Profile(file_write, file);
+    (*file_close)(file);
+  }
+}
+
+
 const char* Heap::GCReasonToString(GCReason gc_reason) {
   switch (gc_reason) {
     case kNewSpace:
       return "new space";
     case kPromotionFailure:
       return "promotion failure";
     case kOldSpace:
       return "old space";
     case kCodeSpace:
       return "code space";
@@ skipping 39 matching lines @@
   isolate()->IncrementNoGCScopeDepth();
 }
 
 
 NoGCScope::~NoGCScope() {
   isolate()->DecrementNoGCScopeDepth();
 }
 #endif  // defined(DEBUG)
 
 }  // namespace dart