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authorLorry Tar Creator <lorry-tar-importer@lorry>2017-06-27 06:07:23 +0000
committerLorry Tar Creator <lorry-tar-importer@lorry>2017-06-27 06:07:23 +0000
commit1bf1084f2b10c3b47fd1a588d85d21ed0eb41d0c (patch)
tree46dcd36c86e7fbc6e5df36deb463b33e9967a6f7 /Source/WebCore/bindings/js/ScriptCallStackFactory.cpp
parent32761a6cee1d0dee366b885b7b9c777e67885688 (diff)
downloadWebKitGtk-tarball-master.tar.gz
Diffstat (limited to 'Source/WebCore/bindings/js/ScriptCallStackFactory.cpp')
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diff --git a/Source/WebCore/bindings/js/ScriptCallStackFactory.cpp b/Source/WebCore/bindings/js/ScriptCallStackFactory.cpp
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-/*
- * Copyright (c) 2010 Google Inc. All rights reserved.
- * Copyright (C) 2012 Research In Motion Limited. 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 "config.h"
-#include "ScriptCallStackFactory.h"
-
-#include "InspectorInstrumentation.h"
-#include "JSDOMBinding.h"
-#include "JSMainThreadExecState.h"
-#include "ScriptArguments.h"
-#include "ScriptCallFrame.h"
-#include "ScriptCallStack.h"
-#include <bindings/ScriptValue.h>
-#include <interpreter/CallFrame.h>
-#include <interpreter/CallFrameInlines.h>
-#include <interpreter/StackVisitor.h>
-#include <runtime/ArgList.h>
-#include <runtime/JSCJSValue.h>
-#include <runtime/JSFunction.h>
-#include <runtime/VM.h>
-#include <wtf/text/WTFString.h>
-
-using namespace JSC;
-
-namespace WebCore {
-
-class ScriptExecutionContext;
-
-class CreateScriptCallStackFunctor {
-public:
- CreateScriptCallStackFunctor(Vector<ScriptCallFrame>& frames, size_t remainingCapacity)
- : m_frames(frames)
- , m_remainingCapacityForFrameCapture(remainingCapacity)
- {
- }
-
- StackVisitor::Status operator()(StackVisitor& visitor)
- {
- if (m_remainingCapacityForFrameCapture) {
- unsigned line;
- unsigned column;
- visitor->computeLineAndColumn(line, column);
- m_frames.append(ScriptCallFrame(visitor->functionName(), visitor->sourceURL(), line, column));
-
- m_remainingCapacityForFrameCapture--;
- return StackVisitor::Continue;
- }
- return StackVisitor::Done;
- }
-
-private:
- Vector<ScriptCallFrame>& m_frames;
- size_t m_remainingCapacityForFrameCapture;
-};
-
-PassRefPtr<ScriptCallStack> createScriptCallStack(size_t maxStackSize, bool emptyIsAllowed)
-{
- Vector<ScriptCallFrame> frames;
- if (JSC::ExecState* exec = JSMainThreadExecState::currentState()) {
- CallFrame* frame = exec->vm().topCallFrame;
- CreateScriptCallStackFunctor functor(frames, maxStackSize);
- frame->iterate(functor);
- }
- if (frames.isEmpty() && !emptyIsAllowed) {
- // No frames found. It may happen in the case where
- // a bound function is called from native code for example.
- // Fallback to setting lineNumber to 0, and source and function name to "undefined".
- frames.append(ScriptCallFrame("undefined", "undefined", 0, 0));
- }
- return ScriptCallStack::create(frames);
-}
-
-class CreateScriptCallStackForConsoleFunctor {
-public:
- CreateScriptCallStackForConsoleFunctor(bool needToSkipAFrame, size_t remainingCapacity, Vector<ScriptCallFrame>& frames)
- : m_needToSkipAFrame(needToSkipAFrame)
- , m_remainingCapacityForFrameCapture(remainingCapacity)
- , m_frames(frames)
- {
- }
-
- StackVisitor::Status operator()(StackVisitor& visitor)
- {
- if (m_needToSkipAFrame) {
- m_needToSkipAFrame = false;
- return StackVisitor::Continue;
- }
-
- if (m_remainingCapacityForFrameCapture) {
- // This early exit is necessary to maintain our old behaviour
- // but the stack trace we produce now is complete and handles all
- // ways in which code may be running
- if (!visitor->callee() && m_frames.size())
- return StackVisitor::Done;
-
- unsigned line;
- unsigned column;
- visitor->computeLineAndColumn(line, column);
- m_frames.append(ScriptCallFrame(visitor->functionName(), visitor->sourceURL(), line, column));
-
- m_remainingCapacityForFrameCapture--;
- return StackVisitor::Continue;
- }
- return StackVisitor::Done;
- }
-
-private:
- bool m_needToSkipAFrame;
- size_t m_remainingCapacityForFrameCapture;
- Vector<ScriptCallFrame>& m_frames;
-};
-
-PassRefPtr<ScriptCallStack> createScriptCallStack(JSC::ExecState* exec, size_t maxStackSize)
-{
- Vector<ScriptCallFrame> frames;
- ASSERT(exec);
- CallFrame* frame = exec->vm().topCallFrame;
- CreateScriptCallStackForConsoleFunctor functor(true, maxStackSize, frames);
- frame->iterate(functor);
- if (frames.isEmpty()) {
- CreateScriptCallStackForConsoleFunctor functor(false, maxStackSize, frames);
- frame->iterate(functor);
- }
- return ScriptCallStack::create(frames);
-}
-
-PassRefPtr<ScriptCallStack> createScriptCallStackFromException(JSC::ExecState* exec, JSC::JSValue& exception, size_t maxStackSize)
-{
- Vector<ScriptCallFrame> frames;
- RefCountedArray<StackFrame> stackTrace = exec->vm().exceptionStack();
- for (size_t i = 0; i < stackTrace.size() && i < maxStackSize; i++) {
- if (!stackTrace[i].callee && frames.size())
- break;
-
- String functionName = stackTrace[i].friendlyFunctionName(exec);
- unsigned line;
- unsigned column;
- stackTrace[i].computeLineAndColumn(line, column);
- frames.append(ScriptCallFrame(functionName, stackTrace[i].sourceURL, line, column));
- }
-
- // FIXME: <http://webkit.org/b/115087> Web Inspector: WebCore::reportException should not evaluate JavaScript handling exceptions
- // Fallback to getting at least the line and sourceURL from the exception if it has values and the exceptionStack doesn't.
- if (frames.size() > 0) {
- const ScriptCallFrame& firstCallFrame = frames.first();
- JSObject* exceptionObject = exception.toObject(exec);
- if (exception.isObject() && firstCallFrame.sourceURL().isEmpty()) {
- JSValue lineValue = exceptionObject->getDirect(exec->vm(), Identifier(exec, "line"));
- int lineNumber = lineValue && lineValue.isNumber() ? int(lineValue.toNumber(exec)) : 0;
- JSValue columnValue = exceptionObject->getDirect(exec->vm(), Identifier(exec, "column"));
- int columnNumber = columnValue && columnValue.isNumber() ? int(columnValue.toNumber(exec)) : 0;
- JSValue sourceURLValue = exceptionObject->getDirect(exec->vm(), Identifier(exec, "sourceURL"));
- String exceptionSourceURL = sourceURLValue && sourceURLValue.isString() ? sourceURLValue.toString(exec)->value(exec) : ASCIILiteral("undefined");
- frames[0] = ScriptCallFrame(firstCallFrame.functionName(), exceptionSourceURL, lineNumber, columnNumber);
- }
- }
-
- return ScriptCallStack::create(frames);
-}
-
-PassRefPtr<ScriptCallStack> createScriptCallStackForConsole(JSC::ExecState* exec)
-{
- size_t maxStackSize = 1;
- if (InspectorInstrumentation::hasFrontends()) {
- ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
- if (InspectorInstrumentation::consoleAgentEnabled(scriptExecutionContext))
- maxStackSize = ScriptCallStack::maxCallStackSizeToCapture;
- }
- return createScriptCallStack(exec, maxStackSize);
-}
-
-PassRefPtr<ScriptArguments> createScriptArguments(JSC::ExecState* exec, unsigned skipArgumentCount)
-{
- Vector<Deprecated::ScriptValue> arguments;
- size_t argumentCount = exec->argumentCount();
- for (size_t i = skipArgumentCount; i < argumentCount; ++i)
- arguments.append(Deprecated::ScriptValue(exec->vm(), exec->uncheckedArgument(i)));
- return ScriptArguments::create(exec, arguments);
-}
-
-} // namespace WebCore