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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* nsScriptErrorWithStack implementation.
* a main-thread-only, cycle-collected subclass of nsScriptErrorBase
* that can store a SavedFrame stack trace object.
*/
#include "nsScriptError.h"
#include "MainThreadUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/dom/ScriptSettings.h"
#include "nsGlobalWindow.h"
#include "nsCycleCollectionParticipant.h"
using namespace mozilla::dom;
namespace {
static nsCString
FormatStackString(JSContext* cx, JS::HandleObject aStack) {
JS::RootedString formattedStack(cx);
if (!JS::BuildStackString(cx, aStack, &formattedStack)) {
return nsCString();
}
nsAutoJSString stackJSString;
if (!stackJSString.init(cx, formattedStack)) {
return nsCString();
}
return NS_ConvertUTF16toUTF8(stackJSString.get());
}
}
NS_IMPL_CYCLE_COLLECTION_CLASS(nsScriptErrorWithStack)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsScriptErrorWithStack)
tmp->mStack = nullptr;
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsScriptErrorWithStack)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsScriptErrorWithStack)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mStack)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsScriptErrorWithStack)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsScriptErrorWithStack)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsScriptErrorWithStack)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIConsoleMessage)
NS_INTERFACE_MAP_ENTRY(nsIScriptError)
NS_INTERFACE_MAP_END
nsScriptErrorWithStack::nsScriptErrorWithStack(JS::HandleObject aStack)
: mStack(aStack)
{
MOZ_ASSERT(NS_IsMainThread(), "You can't use this class on workers.");
mozilla::HoldJSObjects(this);
}
nsScriptErrorWithStack::~nsScriptErrorWithStack() {
mozilla::DropJSObjects(this);
}
NS_IMETHODIMP
nsScriptErrorWithStack::Init(const nsAString& message,
const nsAString& sourceName,
const nsAString& sourceLine,
uint32_t lineNumber,
uint32_t columnNumber,
uint32_t flags,
const char* category)
{
MOZ_CRASH("nsScriptErrorWithStack requires to be initialized with a document, by using InitWithWindowID");
}
NS_IMETHODIMP
nsScriptErrorWithStack::GetStack(JS::MutableHandleValue aStack) {
aStack.setObjectOrNull(mStack);
return NS_OK;
}
NS_IMETHODIMP
nsScriptErrorWithStack::ToString(nsACString& /*UTF8*/ aResult)
{
MOZ_ASSERT(NS_IsMainThread());
nsCString message;
nsresult rv = nsScriptErrorBase::ToString(message);
NS_ENSURE_SUCCESS(rv, rv);
if (!mStack) {
aResult.Assign(message);
return NS_OK;
}
AutoJSAPI jsapi;
if (!jsapi.Init(mStack)) {
return NS_ERROR_FAILURE;
}
JSContext* cx = jsapi.cx();
JS::RootedObject stack(cx, mStack);
nsCString stackString = FormatStackString(cx, stack);
nsCString combined = message + NS_LITERAL_CSTRING("\n") + stackString;
aResult.Assign(combined);
return NS_OK;
}
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