extensions/renderer/console.cc

   1 // Copyright 2014 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 "extensions/renderer/console.h"
   6
   7 #include "base/compiler_specific.h"
   8 #include "base/debug/alias.h"
   9 #include "base/lazy_instance.h"
  10 #include "base/strings/string_util.h"
  11 #include "base/strings/stringprintf.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "content/public/renderer/render_frame.h"
  14 #include "extensions/renderer/extension_frame_helper.h"
  15 #include "extensions/renderer/script_context.h"
  16 #include "extensions/renderer/script_context_set.h"
  17 #include "extensions/renderer/v8_helpers.h"
  18
  19 namespace extensions {
  20 namespace console {
  21
  22 using namespace v8_helpers;
  23
  24 namespace {
  25
  26 // Writes |message| to stack to show up in minidump, then crashes.
  27 void CheckWithMinidump(const std::string& message) {
  28   char minidump[1024];
  29   base::debug::Alias(&minidump);
  30   base::snprintf(
  31       minidump, arraysize(minidump), "e::console: %s", message.c_str());
  32   CHECK(false) << message;
  33 }
  34
  35 typedef void (*LogMethod)(content::RenderFrame* render_frame,
  36                           const std::string& message);
  37
  38 void BoundLogMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info) {
  39   std::string message;
  40   for (int i = 0; i < info.Length(); ++i) {
  41     if (i > 0)
  42       message += " ";
  43     message += *v8::String::Utf8Value(info[i]);
  44   }
  45
  46   v8::Local<v8::Context> context = info.GetIsolate()->GetCallingContext();
  47   if (context.IsEmpty()) {
  48     LOG(WARNING) << "Could not log \"" << message << "\": no context given";
  49     return;
  50   }
  51
  52   ScriptContext* script_context =
  53       ScriptContextSet::GetContextByV8Context(context);
  54   LogMethod log_method =
  55       reinterpret_cast<LogMethod>(info.Data().As<v8::External>()->Value());
  56   (*log_method)(script_context ? script_context->GetRenderFrame() : nullptr,
  57                 message);
  58 }
  59
  60 void BindLogMethod(v8::Isolate* isolate,
  61                    v8::Local<v8::Object> target,
  62                    const std::string& name,
  63                    LogMethod log_method) {
  64   v8::Local<v8::FunctionTemplate> tmpl = v8::FunctionTemplate::New(
  65       isolate,
  66       &BoundLogMethodCallback,
  67       v8::External::New(isolate, reinterpret_cast<void*>(log_method)));
  68   v8::Local<v8::Function> function;
  69   if (!tmpl->GetFunction(isolate->GetCurrentContext()).ToLocal(&function)) {
  70     LOG(FATAL) << "Could not create log function \"" << name << "\"";
  71     return;
  72   }
  73   v8::Local<v8::String> v8_name = ToV8StringUnsafe(isolate, name);
  74   if (!SetProperty(isolate->GetCurrentContext(), target, v8_name, function)) {
  75     LOG(WARNING) << "Could not bind log method \"" << name << "\"";
  76   }
  77   SetProperty(isolate->GetCurrentContext(), target, v8_name,
  78               tmpl->GetFunction());
  79 }
  80
  81 }  // namespace
  82
  83 void Debug(content::RenderFrame* render_frame, const std::string& message) {
  84   AddMessage(render_frame, content::CONSOLE_MESSAGE_LEVEL_DEBUG, message);
  85 }
  86
  87 void Log(content::RenderFrame* render_frame, const std::string& message) {
  88   AddMessage(render_frame, content::CONSOLE_MESSAGE_LEVEL_LOG, message);
  89 }
  90
  91 void Warn(content::RenderFrame* render_frame, const std::string& message) {
  92   AddMessage(render_frame, content::CONSOLE_MESSAGE_LEVEL_WARNING, message);
  93 }
  94
  95 void Error(content::RenderFrame* render_frame, const std::string& message) {
  96   AddMessage(render_frame, content::CONSOLE_MESSAGE_LEVEL_ERROR, message);
  97 }
  98
  99 void Fatal(content::RenderFrame* render_frame, const std::string& message) {
 100   Error(render_frame, message);
 101   CheckWithMinidump(message);
 102 }
 103
 104 void AddMessage(content::RenderFrame* render_frame,
 105                 content::ConsoleMessageLevel level,
 106                 const std::string& message) {
 107   if (!render_frame) {
 108     LOG(WARNING) << "Could not log \"" << message
 109                  << "\": no render frame found";
 110   } else {
 111     render_frame->AddMessageToConsole(level, message);
 112   }
 113 }
 114
 115 v8::Local<v8::Object> AsV8Object(v8::Isolate* isolate) {
 116   v8::EscapableHandleScope handle_scope(isolate);
 117   v8::Local<v8::Object> console_object = v8::Object::New(isolate);
 118   BindLogMethod(isolate, console_object, "debug", &Debug);
 119   BindLogMethod(isolate, console_object, "log", &Log);
 120   BindLogMethod(isolate, console_object, "warn", &Warn);
 121   BindLogMethod(isolate, console_object, "error", &Error);
 122   return handle_scope.Escape(console_object);
 123 }
 124
 125 }  // namespace console
 126 }  // namespace extensions