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author | Ryan <ry@tinyclouds.org> | 2009-04-22 19:35:47 +0200 |
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committer | Ryan <ry@tinyclouds.org> | 2009-04-22 19:35:47 +0200 |
commit | 40c0f755c998d2615fe8466aab20c6d81bd463e7 (patch) | |
tree | 51fcb08ba1bd3f745ceb43fd5f814a5700079881 /deps/v8/src/messages.cc | |
parent | a93cf503073ba0258c55dec4dc325bdc1509b739 (diff) | |
download | node-new-40c0f755c998d2615fe8466aab20c6d81bd463e7.tar.gz |
import full versions of dependency libraries!
Diffstat (limited to 'deps/v8/src/messages.cc')
-rw-r--r-- | deps/v8/src/messages.cc | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/deps/v8/src/messages.cc b/deps/v8/src/messages.cc new file mode 100644 index 0000000000..ca0ce2a542 --- /dev/null +++ b/deps/v8/src/messages.cc @@ -0,0 +1,178 @@ + +// Copyright 2006-2008 the V8 project authors. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#include "v8.h" + +#include "api.h" +#include "execution.h" +#include "spaces-inl.h" +#include "top.h" + +namespace v8 { namespace internal { + + +// If no message listeners have been registered this one is called +// by default. +void MessageHandler::DefaultMessageReport(const MessageLocation* loc, + Handle<Object> message_obj) { + SmartPointer<char> str = GetLocalizedMessage(message_obj); + if (loc == NULL) { + PrintF("%s\n", *str); + } else { + HandleScope scope; + Handle<Object> data(loc->script()->name()); + SmartPointer<char> data_str; + if (data->IsString()) + data_str = Handle<String>::cast(data)->ToCString(DISALLOW_NULLS); + PrintF("%s:%i: %s\n", *data_str ? *data_str : "<unknown>", + loc->start_pos(), *str); + } +} + + +void MessageHandler::ReportMessage(const char* msg) { + PrintF("%s\n", msg); +} + + +Handle<Object> MessageHandler::MakeMessageObject( + const char* type, + MessageLocation* loc, + Vector< Handle<Object> > args, + Handle<String> stack_trace) { + // Build error message object + v8::HandleScope scope; // Instantiate a closeable HandleScope for EscapeFrom. + Handle<Object> type_str = Factory::LookupAsciiSymbol(type); + Handle<Object> array = Factory::NewJSArray(args.length()); + for (int i = 0; i < args.length(); i++) + SetElement(Handle<JSArray>::cast(array), i, args[i]); + + Handle<JSFunction> fun(Top::global_context()->make_message_fun()); + int start, end; + Handle<Object> script; + if (loc) { + start = loc->start_pos(); + end = loc->end_pos(); + script = GetScriptWrapper(loc->script()); + } else { + start = end = 0; + script = Factory::undefined_value(); + } + Handle<Object> start_handle(Smi::FromInt(start)); + Handle<Object> end_handle(Smi::FromInt(end)); + Handle<Object> stack_trace_val = stack_trace.is_null() + ? Factory::undefined_value() + : Handle<Object>::cast(stack_trace); + const int argc = 6; + Object** argv[argc] = { type_str.location(), + array.location(), + start_handle.location(), + end_handle.location(), + script.location(), + stack_trace_val.location() }; + + // Setup a catch handler to catch exceptions in creating the message. This + // handler is non-verbose to avoid calling MakeMessage recursively in case of + // an exception. + v8::TryCatch catcher; + catcher.SetVerbose(false); + catcher.SetCaptureMessage(false); + + // Format the message. + bool caught_exception = false; + Handle<Object> message = + Execution::Call(fun, Factory::undefined_value(), argc, argv, + &caught_exception); + + // If creating the message (in JS code) resulted in an exception, we + // skip doing the callback. This usually only happens in case of + // stack overflow exceptions being thrown by the parser when the + // stack is almost full. + if (caught_exception) return Handle<Object>(); + + return message.EscapeFrom(&scope); +} + + +void MessageHandler::ReportMessage(MessageLocation* loc, + Handle<Object> message) { + v8::Local<v8::Message> api_message_obj = v8::Utils::MessageToLocal(message); + + v8::NeanderArray global_listeners(Factory::message_listeners()); + int global_length = global_listeners.length(); + if (global_length == 0) { + DefaultMessageReport(loc, message); + } else { + for (int i = 0; i < global_length; i++) { + HandleScope scope; + if (global_listeners.get(i)->IsUndefined()) continue; + v8::NeanderObject listener(JSObject::cast(global_listeners.get(i))); + Handle<Proxy> callback_obj(Proxy::cast(listener.get(0))); + v8::MessageCallback callback = + FUNCTION_CAST<v8::MessageCallback>(callback_obj->proxy()); + Handle<Object> callback_data(listener.get(1)); + callback(api_message_obj, v8::Utils::ToLocal(callback_data)); + } + } +} + + +Handle<String> MessageHandler::GetMessage(Handle<Object> data) { + Handle<String> fmt_str = Factory::LookupAsciiSymbol("FormatMessage"); + Handle<JSFunction> fun = + Handle<JSFunction>( + JSFunction::cast( + Top::builtins()->GetProperty(*fmt_str))); + Object** argv[1] = { data.location() }; + + bool caught_exception; + Handle<Object> result = + Execution::TryCall(fun, Top::builtins(), 1, argv, + &caught_exception); + + if (caught_exception || !result->IsString()) { + return Factory::LookupAsciiSymbol("<error>"); + } + Handle<String> result_string = Handle<String>::cast(result); + // A string that has been obtained from JS code in this way is + // likely to be a complicated ConsString of some sort. We flatten it + // here to improve the efficiency of converting it to a C string and + // other operations that are likely to take place (see GetLocalizedMessage + // for example). + FlattenString(result_string); + return result_string; +} + + +SmartPointer<char> MessageHandler::GetLocalizedMessage(Handle<Object> data) { + HandleScope scope; + return GetMessage(data)->ToCString(DISALLOW_NULLS); +} + + +} } // namespace v8::internal |