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// 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 "extensions/renderer/console.h"
#include "base/compiler_specific.h"
#include "base/debug/alias.h"
#include "base/lazy_instance.h"
#include "base/macros.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "content/public/child/worker_thread.h"
#include "content/public/renderer/render_frame.h"
#include "extensions/renderer/extension_frame_helper.h"
#include "extensions/renderer/script_context.h"
#include "extensions/renderer/script_context_set.h"
#include "extensions/renderer/v8_helpers.h"
namespace extensions {
namespace console {
using namespace v8_helpers;
namespace {
// Writes |message| to stack to show up in minidump, then crashes.
void CheckWithMinidump(const std::string& message) {
char minidump[1024];
base::debug::Alias(&minidump);
base::snprintf(
minidump, arraysize(minidump), "e::console: %s", message.c_str());
CHECK(false) << message;
}
typedef void (*LogMethod)(content::RenderFrame* render_frame,
const std::string& message);
void BoundLogMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info) {
std::string message;
for (int i = 0; i < info.Length(); ++i) {
if (i > 0)
message += " ";
message += *v8::String::Utf8Value(info[i]);
}
v8::Local<v8::Context> context = info.GetIsolate()->GetCurrentContext();
if (context.IsEmpty()) {
LOG(WARNING) << "Could not log \"" << message << "\": no context given";
return;
}
// A worker's ScriptContext neither lives in ScriptContextSet nor it has a
// RenderFrame associated with it, so early exit in this case.
// TODO(lazyboy): Fix.
if (content::WorkerThread::GetCurrentId() > 0)
return;
ScriptContext* script_context =
ScriptContextSet::GetContextByV8Context(context);
LogMethod log_method =
reinterpret_cast<LogMethod>(info.Data().As<v8::External>()->Value());
(*log_method)(script_context ? script_context->GetRenderFrame() : nullptr,
message);
}
void BindLogMethod(v8::Isolate* isolate,
v8::Local<v8::Object> target,
const std::string& name,
LogMethod log_method) {
v8::Local<v8::FunctionTemplate> tmpl = v8::FunctionTemplate::New(
isolate,
&BoundLogMethodCallback,
v8::External::New(isolate, reinterpret_cast<void*>(log_method)));
tmpl->RemovePrototype();
v8::Local<v8::Function> function;
if (!tmpl->GetFunction(isolate->GetCurrentContext()).ToLocal(&function)) {
LOG(FATAL) << "Could not create log function \"" << name << "\"";
return;
}
v8::Local<v8::String> v8_name = ToV8StringUnsafe(isolate, name);
if (!SetProperty(isolate->GetCurrentContext(), target, v8_name, function)) {
LOG(WARNING) << "Could not bind log method \"" << name << "\"";
}
SetProperty(isolate->GetCurrentContext(), target, v8_name,
tmpl->GetFunction());
}
} // namespace
void Debug(content::RenderFrame* render_frame, const std::string& message) {
AddMessage(render_frame, content::CONSOLE_MESSAGE_LEVEL_DEBUG, message);
}
void Log(content::RenderFrame* render_frame, const std::string& message) {
AddMessage(render_frame, content::CONSOLE_MESSAGE_LEVEL_LOG, message);
}
void Warn(content::RenderFrame* render_frame, const std::string& message) {
AddMessage(render_frame, content::CONSOLE_MESSAGE_LEVEL_WARNING, message);
}
void Error(content::RenderFrame* render_frame, const std::string& message) {
AddMessage(render_frame, content::CONSOLE_MESSAGE_LEVEL_ERROR, message);
}
void Fatal(content::RenderFrame* render_frame, const std::string& message) {
Error(render_frame, message);
CheckWithMinidump(message);
}
void AddMessage(content::RenderFrame* render_frame,
content::ConsoleMessageLevel level,
const std::string& message) {
if (!render_frame) {
LOG(WARNING) << "Could not log \"" << message
<< "\": no render frame found";
} else {
render_frame->AddMessageToConsole(level, message);
}
}
v8::Local<v8::Object> AsV8Object(v8::Isolate* isolate) {
v8::EscapableHandleScope handle_scope(isolate);
v8::Local<v8::Object> console_object = v8::Object::New(isolate);
BindLogMethod(isolate, console_object, "debug", &Debug);
BindLogMethod(isolate, console_object, "log", &Log);
BindLogMethod(isolate, console_object, "warn", &Warn);
BindLogMethod(isolate, console_object, "error", &Error);
return handle_scope.Escape(console_object);
}
} // namespace console
} // namespace extensions
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