extensions/renderer/logging_native_handler.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/logging_native_handler.h"
   6
   7 #include "base/logging.h"
   8 #include "base/strings/stringprintf.h"
   9
  10 namespace extensions {
  11
  12 LoggingNativeHandler::LoggingNativeHandler(ScriptContext* context)
  13     : ObjectBackedNativeHandler(context) {
  14   RouteFunction(
  15       "DCHECK",
  16       base::Bind(&LoggingNativeHandler::Dcheck, base::Unretained(this)));
  17   RouteFunction(
  18       "CHECK",
  19       base::Bind(&LoggingNativeHandler::Check, base::Unretained(this)));
  20   RouteFunction(
  21       "DCHECK_IS_ON",
  22       base::Bind(&LoggingNativeHandler::DcheckIsOn, base::Unretained(this)));
  23   RouteFunction("LOG",
  24                 base::Bind(&LoggingNativeHandler::Log, base::Unretained(this)));
  25   RouteFunction(
  26       "WARNING",
  27       base::Bind(&LoggingNativeHandler::Warning, base::Unretained(this)));
  28 }
  29
  30 LoggingNativeHandler::~LoggingNativeHandler() {}
  31
  32 void LoggingNativeHandler::Check(
  33     const v8::FunctionCallbackInfo<v8::Value>& args) {
  34   bool check_value;
  35   std::string error_message;
  36   ParseArgs(args, &check_value, &error_message);
  37   CHECK(check_value) << error_message;
  38 }
  39
  40 void LoggingNativeHandler::Dcheck(
  41     const v8::FunctionCallbackInfo<v8::Value>& args) {
  42   bool check_value;
  43   std::string error_message;
  44   ParseArgs(args, &check_value, &error_message);
  45   DCHECK(check_value) << error_message;
  46 }
  47
  48 void LoggingNativeHandler::DcheckIsOn(
  49     const v8::FunctionCallbackInfo<v8::Value>& args) {
  50   args.GetReturnValue().Set(DCHECK_IS_ON);
  51 }
  52
  53 void LoggingNativeHandler::Log(
  54     const v8::FunctionCallbackInfo<v8::Value>& args) {
  55   CHECK_EQ(1, args.Length());
  56   LOG(INFO) << *v8::String::Utf8Value(args[0]);
  57 }
  58
  59 void LoggingNativeHandler::Warning(
  60     const v8::FunctionCallbackInfo<v8::Value>& args) {
  61   CHECK_EQ(1, args.Length());
  62   LOG(WARNING) << *v8::String::Utf8Value(args[0]);
  63 }
  64
  65 void LoggingNativeHandler::ParseArgs(
  66     const v8::FunctionCallbackInfo<v8::Value>& args,
  67     bool* check_value,
  68     std::string* error_message) {
  69   CHECK_LE(args.Length(), 2);
  70   *check_value = args[0]->BooleanValue();
  71   if (args.Length() == 2) {
  72     *error_message = "Error: " + std::string(*v8::String::Utf8Value(args[1]));
  73   }
  74
  75   v8::Handle<v8::StackTrace> stack_trace =
  76       v8::StackTrace::CurrentStackTrace(args.GetIsolate(), 10);
  77   if (stack_trace.IsEmpty() || stack_trace->GetFrameCount() <= 0) {
  78     *error_message += "\n    <no stack trace>";
  79   } else {
  80     for (size_t i = 0; i < (size_t)stack_trace->GetFrameCount(); ++i) {
  81       v8::Handle<v8::StackFrame> frame = stack_trace->GetFrame(i);
  82       CHECK(!frame.IsEmpty());
  83       *error_message += base::StringPrintf(
  84           "\n    at %s (%s:%d:%d)",
  85           ToStringOrDefault(frame->GetFunctionName(), "<anonymous>").c_str(),
  86           ToStringOrDefault(frame->GetScriptName(), "<anonymous>").c_str(),
  87           frame->GetLineNumber(),
  88           frame->GetColumn());
  89     }
  90   }
  91 }
  92
  93 std::string LoggingNativeHandler::ToStringOrDefault(
  94     const v8::Handle<v8::String>& v8_string,
  95     const std::string& dflt) {
  96   if (v8_string.IsEmpty())
  97     return dflt;
  98   std::string ascii_value = *v8::String::Utf8Value(v8_string);
  99   return ascii_value.empty() ? dflt : ascii_value;
 100 }
 101
 102 }  // namespace extensions