Record allocation stack traces

test/cctest/test-heap-profiler.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2003 matching lines @@
   HeapObjectsTracker tracker;
   CompileRun("var a = 1.2");
   CompileRun("var a = 1.2; var b = 1.0; var c = 1.0;");
   CompileRun(
     "var a = [];"
     "for (var i = 0; i < 5; ++i)"
     "    a[i] = i;\n"
     "for (var i = 0; i < 3; ++i)"
     "    a.shift();\n");
 }
+
+
+static const char* record_allocation_traces_source =
+"var topFunctions = [];\n"
+"var global = this;\n"
+"var calls = 0;\n"
+"function generateFunctions(width, depth) {\n"
+"    var script = [];\n"
+"    for (var i = 0; i < width; i++) {\n"
+"        for (var j = 0; j < depth; j++) {\n"
+"            script.push('function f_' + i + '_' + j + '(x) {\\n');\n"
+"            script.push('  try {\\n');\n"
+"            if (j < depth-2) {\n"
+"                script.push('    return f_' + i + '_' + (j+1) + '(x+1);\\n');\n"

[loislo, 2013/10/16 15:14:08]

80 symbols

[yurys, 2013/10/17 15:27:35]

Done.

+"            } else if (j == depth - 2) {\n"
+"                script.push('    return new f_' + i + '_' + (depth - 1) + '();\\n');\n"

[loislo, 2013/10/16 15:14:08]

80 symbols

[yurys, 2013/10/17 15:27:35]

Done.

+"            } else if (j == depth - 1) {\n"
+"                script.push('    /*++calls; empty */\\n');\n"
+"            }\n"
+"            script.push('  } catch (e) {}\\n');\n"
+"            script.push('}\\n');\n"
+"            \n"
+"        }\n"
+"    }\n"
+"    var script = script.join('');\n"
+"    global.eval(script);\n"
+"    for (var i = 0; i < width; i++) {\n"
+"        topFunctions.push(this['f_' + i + '_0']);\n"
+"    }\n"
+"}\n"
+"\n"
+"var width = 5;\n"
+"var depth = 5;\n"
+"generateFunctions(width, depth);\n"
+"var instances = [];\n"
+"function start() {\n"
+"  for (var i = 0; i < width; i++) {\n"
+"    instances.push(topFunctions[i](0));\n"
+"  }\n"
+"}\n"
+"\n"
+"for (var i = 0; i < 1000; i++) start();\n";
+
+
+class StreamPrinter : public v8::OutputStream {
+ public:
+  virtual void EndOfStream() {
+  }
+  virtual int GetChunkSize() { return 1024; }
+  virtual WriteResult WriteAsciiChunk(char* data, int size) {
+//    for (int i = 0; i < size; i++) {
+//      printf("%c", data[i]);
+//    }
+    return kContinue;
+  }
+};
+
+TEST(RecordAllocationTraces) {
+  v8::HandleScope scope(v8::Isolate::GetCurrent());
+  LocalContext env;
+  HeapObjectsTracker tracker;
+
+  CompileRun(record_allocation_traces_source);
+
+
+  // Print heap snapshot with collected allocation traces.
+  v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
+  const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot(
+      v8::String::New("Test"));
+  StreamPrinter printer;
+  snapshot->Serialize(&printer, v8::HeapSnapshot::kJSON);
+}