LCOV - code coverage report
Current view: top level - dom/bindings - nsScriptErrorWithStack.cpp (source / functions) Hit Total Coverage
Test: output.info Lines: 0 53 0.0 %
Date: 2017-07-14 16:53:18 Functions: 0 14 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /* vim: set ts=8 sts=4 et sw=4 tw=99: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : /*
       8             :  * nsScriptErrorWithStack implementation.
       9             :  * a main-thread-only, cycle-collected subclass of nsScriptErrorBase
      10             :  * that can store a SavedFrame stack trace object.
      11             :  */
      12             : 
      13             : #include "nsScriptError.h"
      14             : #include "MainThreadUtils.h"
      15             : #include "mozilla/Assertions.h"
      16             : #include "mozilla/dom/ScriptSettings.h"
      17             : #include "nsGlobalWindow.h"
      18             : #include "nsCycleCollectionParticipant.h"
      19             : 
      20             : using namespace mozilla::dom;
      21             : 
      22             : namespace {
      23             : 
      24             : static nsCString
      25           0 : FormatStackString(JSContext* cx, HandleObject aStack) {
      26           0 :     JS::RootedString formattedStack(cx);
      27             : 
      28           0 :     if (!JS::BuildStackString(cx, aStack, &formattedStack)) {
      29           0 :         return nsCString();
      30             :     }
      31             : 
      32           0 :     nsAutoJSString stackJSString;
      33           0 :     if (!stackJSString.init(cx, formattedStack)) {
      34           0 :         return nsCString();
      35             :     }
      36             : 
      37           0 :     return NS_ConvertUTF16toUTF8(stackJSString.get());
      38             : }
      39             : 
      40             : }
      41             : 
      42             : 
      43             : NS_IMPL_CYCLE_COLLECTION_CLASS(nsScriptErrorWithStack)
      44             : 
      45           0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsScriptErrorWithStack)
      46           0 :   tmp->mStack = nullptr;
      47           0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_END
      48             : 
      49           0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsScriptErrorWithStack)
      50           0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
      51             : 
      52           0 : NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsScriptErrorWithStack)
      53           0 :   NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mStack)
      54           0 : NS_IMPL_CYCLE_COLLECTION_TRACE_END
      55             : 
      56           0 : NS_IMPL_CYCLE_COLLECTING_ADDREF(nsScriptErrorWithStack)
      57           0 : NS_IMPL_CYCLE_COLLECTING_RELEASE(nsScriptErrorWithStack)
      58             : 
      59           0 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsScriptErrorWithStack)
      60           0 :   NS_INTERFACE_MAP_ENTRY(nsISupports)
      61           0 :   NS_INTERFACE_MAP_ENTRY(nsIConsoleMessage)
      62           0 :   NS_INTERFACE_MAP_ENTRY(nsIScriptError)
      63           0 : NS_INTERFACE_MAP_END
      64             : 
      65           0 : nsScriptErrorWithStack::nsScriptErrorWithStack(JS::HandleObject aStack)
      66           0 :   : mStack(aStack)
      67             : {
      68           0 :     MOZ_ASSERT(NS_IsMainThread(), "You can't use this class on workers.");
      69           0 :     mozilla::HoldJSObjects(this);
      70           0 : }
      71             : 
      72           0 : nsScriptErrorWithStack::~nsScriptErrorWithStack() {
      73           0 :     mozilla::DropJSObjects(this);
      74           0 : }
      75             : 
      76             : NS_IMETHODIMP
      77           0 : nsScriptErrorWithStack::Init(const nsAString& message,
      78             :                              const nsAString& sourceName,
      79             :                              const nsAString& sourceLine,
      80             :                              uint32_t lineNumber,
      81             :                              uint32_t columnNumber,
      82             :                              uint32_t flags,
      83             :                              const char* category)
      84             : {
      85           0 :   MOZ_CRASH("nsScriptErrorWithStack requires to be initialized with a document, by using InitWithWindowID");
      86             : }
      87             : 
      88             : NS_IMETHODIMP
      89           0 : nsScriptErrorWithStack::GetStack(JS::MutableHandleValue aStack) {
      90           0 :     aStack.setObjectOrNull(mStack);
      91           0 :     return NS_OK;
      92             : }
      93             : 
      94             : NS_IMETHODIMP
      95           0 : nsScriptErrorWithStack::ToString(nsACString& /*UTF8*/ aResult)
      96             : {
      97           0 :     MOZ_ASSERT(NS_IsMainThread());
      98             : 
      99           0 :     nsCString message;
     100           0 :     nsresult rv = nsScriptErrorBase::ToString(message);
     101           0 :     NS_ENSURE_SUCCESS(rv, rv);
     102             : 
     103           0 :     if (!mStack) {
     104           0 :         aResult.Assign(message);
     105           0 :         return NS_OK;
     106             :     }
     107             : 
     108           0 :     AutoJSAPI jsapi;
     109           0 :     if (!jsapi.Init(mStack)) {
     110           0 :         return NS_ERROR_FAILURE;
     111             :     }
     112             : 
     113           0 :     JSContext* cx = jsapi.cx();
     114           0 :     RootedObject stack(cx, mStack);
     115           0 :     nsCString stackString = FormatStackString(cx, stack);
     116           0 :     nsCString combined = message + NS_LITERAL_CSTRING("\n") + stackString;
     117           0 :     aResult.Assign(combined);
     118             : 
     119           0 :     return NS_OK;
     120             : }

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