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