2011-10-06 09:31:38 +00:00
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// Copyright 2011 the V8 project authors. All rights reserved.
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2008-07-03 15:10:15 +00:00
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "api.h"
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#include "execution.h"
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2010-03-09 06:38:33 +00:00
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#include "messages.h"
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2008-07-03 15:10:15 +00:00
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#include "spaces-inl.h"
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2009-05-25 10:05:56 +00:00
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namespace v8 {
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namespace internal {
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2008-07-03 15:10:15 +00:00
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// If no message listeners have been registered this one is called
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// by default.
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2013-02-15 09:27:10 +00:00
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void MessageHandler::DefaultMessageReport(Isolate* isolate,
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const MessageLocation* loc,
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Handle<Object> message_obj) {
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SmartArrayPointer<char> str = GetLocalizedMessage(isolate, message_obj);
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if (loc == NULL) {
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PrintF("%s\n", *str);
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} else {
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HandleScope scope(isolate);
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Handle<Object> data(loc->script()->name(), isolate);
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2011-09-09 22:39:47 +00:00
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SmartArrayPointer<char> data_str;
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if (data->IsString())
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data_str = Handle<String>::cast(data)->ToCString(DISALLOW_NULLS);
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PrintF("%s:%i: %s\n", *data_str ? *data_str : "<unknown>",
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loc->start_pos(), *str);
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}
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}
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2011-02-02 13:31:52 +00:00
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Handle<JSMessageObject> MessageHandler::MakeMessageObject(
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Isolate* isolate,
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2008-09-09 18:55:41 +00:00
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const char* type,
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MessageLocation* loc,
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Vector< Handle<Object> > args,
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2010-07-12 13:17:27 +00:00
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Handle<String> stack_trace,
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Handle<JSArray> stack_frames) {
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Factory* factory = isolate->factory();
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Handle<String> type_handle = factory->InternalizeUtf8String(type);
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2011-02-08 19:42:14 +00:00
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Handle<FixedArray> arguments_elements =
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factory->NewFixedArray(args.length());
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for (int i = 0; i < args.length(); i++) {
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arguments_elements->set(i, *args[i]);
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}
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Handle<JSArray> arguments_handle =
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factory->NewJSArrayWithElements(arguments_elements);
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int start = 0;
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int end = 0;
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Handle<Object> script_handle = factory->undefined_value();
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if (loc) {
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start = loc->start_pos();
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end = loc->end_pos();
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script_handle = GetScriptWrapper(loc->script());
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}
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Handle<Object> stack_trace_handle = stack_trace.is_null()
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? Handle<Object>::cast(factory->undefined_value())
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: Handle<Object>::cast(stack_trace);
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2011-02-08 19:42:14 +00:00
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Handle<Object> stack_frames_handle = stack_frames.is_null()
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? Handle<Object>::cast(factory->undefined_value())
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: Handle<Object>::cast(stack_frames);
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Handle<JSMessageObject> message =
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factory->NewJSMessageObject(type_handle,
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arguments_handle,
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start,
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end,
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script_handle,
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stack_trace_handle,
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stack_frames_handle);
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return message;
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2008-09-09 18:55:41 +00:00
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}
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2008-07-03 15:10:15 +00:00
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2011-04-07 19:52:24 +00:00
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void MessageHandler::ReportMessage(Isolate* isolate,
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MessageLocation* loc,
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Handle<Object> message) {
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2011-04-07 19:52:24 +00:00
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// We are calling into embedder's code which can throw exceptions.
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// Thus we need to save current exception state, reset it to the clean one
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// and ignore scheduled exceptions callbacks can throw.
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2012-10-19 08:45:24 +00:00
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// We pass the exception object into the message handler callback though.
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Object* exception_object = isolate->heap()->undefined_value();
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if (isolate->has_pending_exception()) {
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isolate->pending_exception()->ToObject(&exception_object);
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}
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Handle<Object> exception_handle(exception_object, isolate);
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2011-04-07 19:52:24 +00:00
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Isolate::ExceptionScope exception_scope(isolate);
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isolate->clear_pending_exception();
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isolate->set_external_caught_exception(false);
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2008-07-03 15:10:15 +00:00
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v8::Local<v8::Message> api_message_obj = v8::Utils::MessageToLocal(message);
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v8::Local<v8::Value> api_exception_obj = v8::Utils::ToLocal(exception_handle);
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v8::NeanderArray global_listeners(isolate->factory()->message_listeners());
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int global_length = global_listeners.length();
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if (global_length == 0) {
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DefaultMessageReport(isolate, loc, message);
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2011-04-07 19:52:24 +00:00
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if (isolate->has_scheduled_exception()) {
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isolate->clear_scheduled_exception();
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}
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} else {
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for (int i = 0; i < global_length; i++) {
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HandleScope scope(isolate);
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if (global_listeners.get(i)->IsUndefined()) continue;
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2013-02-27 14:35:39 +00:00
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v8::NeanderObject listener(JSObject::cast(global_listeners.get(i)));
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Handle<Foreign> callback_obj(Foreign::cast(listener.get(0)));
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v8::MessageCallback callback =
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FUNCTION_CAST<v8::MessageCallback>(callback_obj->foreign_address());
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Handle<Object> callback_data(listener.get(1), isolate);
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2011-04-11 16:16:52 +00:00
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{
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// Do not allow exceptions to propagate.
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2011-04-18 13:28:00 +00:00
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v8::TryCatch try_catch;
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callback(api_message_obj, callback_data->IsUndefined()
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? api_exception_obj
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: v8::Utils::ToLocal(callback_data));
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2011-04-11 16:16:52 +00:00
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}
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2011-04-07 19:52:24 +00:00
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if (isolate->has_scheduled_exception()) {
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isolate->clear_scheduled_exception();
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}
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2008-07-03 15:10:15 +00:00
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}
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}
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}
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2013-02-25 14:46:09 +00:00
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Handle<String> MessageHandler::GetMessage(Isolate* isolate,
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Handle<Object> data) {
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Factory* factory = isolate->factory();
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2012-12-17 15:56:16 +00:00
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Handle<String> fmt_str =
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2013-02-28 17:03:34 +00:00
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factory->InternalizeOneByteString(STATIC_ASCII_VECTOR("FormatMessage"));
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Handle<JSFunction> fun =
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Handle<JSFunction>(
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JSFunction::cast(
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isolate->js_builtins_object()->
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GetPropertyNoExceptionThrown(*fmt_str)));
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2012-11-09 08:22:02 +00:00
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Handle<JSMessageObject> message = Handle<JSMessageObject>::cast(data);
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Handle<Object> argv[] = { Handle<Object>(message->type(), isolate),
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Handle<Object>(message->arguments(), isolate) };
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2008-07-03 15:10:15 +00:00
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bool caught_exception;
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Handle<Object> result =
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Execution::TryCall(fun,
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isolate->js_builtins_object(),
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ARRAY_SIZE(argv),
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argv,
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&caught_exception);
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if (caught_exception || !result->IsString()) {
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return factory->InternalizeOneByteString(STATIC_ASCII_VECTOR("<error>"));
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}
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Handle<String> result_string = Handle<String>::cast(result);
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// A string that has been obtained from JS code in this way is
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// likely to be a complicated ConsString of some sort. We flatten it
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// here to improve the efficiency of converting it to a C string and
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// other operations that are likely to take place (see GetLocalizedMessage
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// for example).
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FlattenString(result_string);
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return result_string;
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}
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2011-09-09 22:39:47 +00:00
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SmartArrayPointer<char> MessageHandler::GetLocalizedMessage(
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2013-02-15 09:27:10 +00:00
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Isolate* isolate,
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2011-09-09 22:39:47 +00:00
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Handle<Object> data) {
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HandleScope scope(isolate);
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2013-02-25 14:46:09 +00:00
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return GetMessage(isolate, data)->ToCString(DISALLOW_NULLS);
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2008-07-03 15:10:15 +00:00
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}
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} } // namespace v8::internal
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