Implement stack trace printing callback for v8

gin/v8_platform.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gin/public/v8_platform.h"
 
 #include "base/bind.h"
+#include "base/debug/stack_trace.h"
 #include "base/location.h"
 #include "base/sys_info.h"
 #include "base/threading/worker_pool.h"
 #include "base/trace_event/trace_event.h"
 #include "gin/per_isolate_data.h"
 
 namespace gin {
 
 namespace {
 
@@ skipping 17 matching lines @@
     task_->Run(deadline_in_seconds);
   }
 
  private:
   v8::Isolate* isolate_;
   std::unique_ptr<v8::IdleTask> task_;
 
   DISALLOW_COPY_AND_ASSIGN(IdleTaskWithLocker);
 };
 
+void PrintStackTrace() {
+  base::debug::StackTrace trace;
+  trace.Print();
+}
+
 }  // namespace
 
 // static
 V8Platform* V8Platform::Get() { return g_v8_platform.Pointer(); }
 
 V8Platform::V8Platform() {}
 
 V8Platform::~V8Platform() {}
 
 size_t V8Platform::NumberOfAvailableBackgroundThreads() {
@@ skipping 201 matching lines @@
 void V8Platform::AddTraceStateObserver(
     v8::Platform::TraceStateObserver* observer) {
   g_trace_state_dispatcher.Get().AddObserver(observer);
 }
 
 void V8Platform::RemoveTraceStateObserver(
     v8::Platform::TraceStateObserver* observer) {
   g_trace_state_dispatcher.Get().RemoveObserver(observer);
 }
 
+v8::Platform::StackTracePrinter V8Platform::GetStackTracePrinter() {
+  return PrintStackTrace;
+}
+
 }  // namespace gin