gin/try_catch.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "gin/try_catch.h"
   6
   7 #include <sstream>
   8
   9 #include "gin/converter.h"
  10
  11 namespace {
  12
  13 v8::Local<v8::String> GetSourceLine(v8::Isolate* isolate,
  14                                     v8::Local<v8::Message> message) {
  15   auto maybe = message->GetSourceLine(isolate->GetCurrentContext());
  16   v8::Local<v8::String> source_line;
  17   return maybe.ToLocal(&source_line) ? source_line : v8::String::Empty(isolate);
  18 }
  19
  20 }  // namespace
  21
  22 namespace gin {
  23
  24 TryCatch::TryCatch(v8::Isolate* isolate)
  25     : isolate_(isolate), try_catch_(isolate) {
  26 }
  27
  28 TryCatch::~TryCatch() {
  29 }
  30
  31 bool TryCatch::HasCaught() {
  32   return try_catch_.HasCaught();
  33 }
  34
  35 std::string TryCatch::GetStackTrace() {
  36   if (!HasCaught()) {
  37     return "";
  38   }
  39
  40   std::stringstream ss;
  41   v8::Local<v8::Message> message = try_catch_.Message();
  42   ss << V8ToString(message->Get()) << std::endl
  43      << V8ToString(GetSourceLine(isolate_, message)) << std::endl;
  44
  45   v8::Local<v8::StackTrace> trace = message->GetStackTrace();
  46   if (trace.IsEmpty())
  47     return ss.str();
  48
  49   int len = trace->GetFrameCount();
  50   for (int i = 0; i < len; ++i) {
  51     v8::Local<v8::StackFrame> frame = trace->GetFrame(i);
  52     ss << V8ToString(frame->GetScriptName()) << ":"
  53        << frame->GetLineNumber() << ":"
  54        << frame->GetColumn() << ": "
  55        << V8ToString(frame->GetFunctionName())
  56        << std::endl;
  57   }
  58   return ss.str();
  59 }
  60
  61 }  // namespace gin