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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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95
docshell/base/timeline/JavascriptTimelineMarker.h Normal file
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef mozilla_JavascriptTimelineMarker_h_
#define mozilla_JavascriptTimelineMarker_h_
#include "TimelineMarker.h"
#include "mozilla/dom/ProfileTimelineMarkerBinding.h"
#include "mozilla/dom/RootedDictionary.h"
#include "mozilla/dom/ToJSValue.h"
namespace mozilla {
class JavascriptTimelineMarker : public TimelineMarker
{
public:
// The caller owns |aAsyncCause| here, so we must copy it into a separate
// string for use later on.
JavascriptTimelineMarker(const char* aReason,
const char16_t* aFunctionName,
const char16_t* aFileName,
uint32_t aLineNumber,
MarkerTracingType aTracingType,
JS::Handle<JS::Value> aAsyncStack,
const char* aAsyncCause)
: TimelineMarker("Javascript", aTracingType, MarkerStackRequest::NO_STACK)
, mCause(NS_ConvertUTF8toUTF16(aReason))
, mFunctionName(aFunctionName)
, mFileName(aFileName)
, mLineNumber(aLineNumber)
, mAsyncCause(aAsyncCause)
{
JSContext* ctx = nsContentUtils::GetCurrentJSContext();
if (ctx) {
mAsyncStack.init(ctx, aAsyncStack);
}
}
virtual void AddDetails(JSContext* aCx, dom::ProfileTimelineMarker& aMarker) override
{
TimelineMarker::AddDetails(aCx, aMarker);
aMarker.mCauseName.Construct(mCause);
if (!mFunctionName.IsEmpty() || !mFileName.IsEmpty()) {
dom::RootedDictionary<dom::ProfileTimelineStackFrame> stackFrame(aCx);
stackFrame.mLine.Construct(mLineNumber);
stackFrame.mSource.Construct(mFileName);
stackFrame.mFunctionDisplayName.Construct(mFunctionName);
if (mAsyncStack.isObject() && !mAsyncStack.isNullOrUndefined() &&
!mAsyncCause.IsEmpty()) {
JS::Rooted<JSObject*> asyncStack(aCx, mAsyncStack.toObjectOrNull());
JS::Rooted<JSObject*> parentFrame(aCx);
JS::Rooted<JSString*> asyncCause(aCx, JS_NewUCStringCopyN(aCx, mAsyncCause.BeginReading(),
mAsyncCause.Length()));
if (!asyncCause) {
JS_ClearPendingException(aCx);
return;
}
if (JS::IsSavedFrame(asyncStack) &&
!JS::CopyAsyncStack(aCx, asyncStack, asyncCause, &parentFrame, 0)) {
JS_ClearPendingException(aCx);
} else {
stackFrame.mAsyncParent = parentFrame;
}
}
JS::Rooted<JS::Value> newStack(aCx);
if (ToJSValue(aCx, stackFrame, &newStack)) {
if (newStack.isObject()) {
aMarker.mStack = &newStack.toObject();
}
} else {
JS_ClearPendingException(aCx);
}
}
}
private:
nsString mCause;
nsString mFunctionName;
nsString mFileName;
uint32_t mLineNumber;
JS::PersistentRooted<JS::Value> mAsyncStack;
NS_ConvertUTF8toUTF16 mAsyncCause;
};
} // namespace mozilla
#endif // mozilla_JavascriptTimelineMarker_h_