Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 185 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/profiler/Profiler.cpp b/Source/JavaScriptCore/profiler/Profiler.cpp
new file mode 100644
index 000000000..0a4b547d4
--- /dev/null
+++ b/Source/JavaScriptCore/profiler/Profiler.cpp
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2008 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 "Profiler.h"
+
+#include "CommonIdentifiers.h"
+#include "CallFrame.h"
+#include "CodeBlock.h"
+#include "InternalFunction.h"
+#include "JSFunction.h"
+#include "JSGlobalObject.h"
+#include "Nodes.h"
+#include "Profile.h"
+#include "ProfileGenerator.h"
+#include "ProfileNode.h"
+#include "UStringConcatenate.h"
+#include <stdio.h>
+
+namespace JSC {
+
+static const char* GlobalCodeExecution = "(program)";
+static const char* AnonymousFunction = "(anonymous function)";
+static unsigned ProfilesUID = 0;
+
+static CallIdentifier createCallIdentifierFromFunctionImp(ExecState*, JSFunction*);
+
+Profiler* Profiler::s_sharedProfiler = 0;
+Profiler* Profiler::s_sharedEnabledProfilerReference = 0;
+
+Profiler* Profiler::profiler()
+{
+    if (!s_sharedProfiler)
+        s_sharedProfiler = new Profiler();
+    return s_sharedProfiler;
+}   
+
+void Profiler::startProfiling(ExecState* exec, const UString& title)
+{
+    ASSERT_ARG(title, !title.isNull());
+
+    // Check if we currently have a Profile for this global ExecState and title.
+    // If so return early and don't create a new Profile.
+    JSGlobalObject* origin = exec ? exec->lexicalGlobalObject() : 0;
+
+    for (size_t i = 0; i < m_currentProfiles.size(); ++i) {
+        ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
+        if (profileGenerator->origin() == origin && profileGenerator->title() == title)
+            return;
+    }
+
+    s_sharedEnabledProfilerReference = this;
+    RefPtr<ProfileGenerator> profileGenerator = ProfileGenerator::create(exec, title, ++ProfilesUID);
+    m_currentProfiles.append(profileGenerator);
+}
+
+PassRefPtr<Profile> Profiler::stopProfiling(ExecState* exec, const UString& title)
+{
+    JSGlobalObject* origin = exec ? exec->lexicalGlobalObject() : 0;
+    for (ptrdiff_t i = m_currentProfiles.size() - 1; i >= 0; --i) {
+        ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
+        if (profileGenerator->origin() == origin && (title.isNull() || profileGenerator->title() == title)) {
+            profileGenerator->stopProfiling();
+            RefPtr<Profile> returnProfile = profileGenerator->profile();
+
+            m_currentProfiles.remove(i);
+            if (!m_currentProfiles.size())
+                s_sharedEnabledProfilerReference = 0;
+            
+            return returnProfile;
+        }
+    }
+
+    return 0;
+}
+
+void Profiler::stopProfiling(JSGlobalObject* origin)
+{
+    for (ptrdiff_t i = m_currentProfiles.size() - 1; i >= 0; --i) {
+        ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
+        if (profileGenerator->origin() == origin) {
+            profileGenerator->stopProfiling();
+            m_currentProfiles.remove(i);
+            if (!m_currentProfiles.size())
+                s_sharedEnabledProfilerReference = 0;
+        }
+    }
+}
+
+static inline void dispatchFunctionToProfiles(ExecState* callerOrHandlerCallFrame, const Vector<RefPtr<ProfileGenerator> >& profiles, ProfileGenerator::ProfileFunction function, const CallIdentifier& callIdentifier, unsigned currentProfileTargetGroup)
+{
+    for (size_t i = 0; i < profiles.size(); ++i) {
+        if (profiles[i]->profileGroup() == currentProfileTargetGroup || !profiles[i]->origin())
+            (profiles[i].get()->*function)(callerOrHandlerCallFrame, callIdentifier);
+    }
+}
+
+void Profiler::willExecute(ExecState* callerCallFrame, JSValue function)
+{
+    ASSERT(!m_currentProfiles.isEmpty());
+
+    dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::willExecute, createCallIdentifier(callerCallFrame, function, "", 0), callerCallFrame->lexicalGlobalObject()->profileGroup());
+}
+
+void Profiler::willExecute(ExecState* callerCallFrame, const UString& sourceURL, int startingLineNumber)
+{
+    ASSERT(!m_currentProfiles.isEmpty());
+
+    CallIdentifier callIdentifier = createCallIdentifier(callerCallFrame, JSValue(), sourceURL, startingLineNumber);
+
+    dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::willExecute, callIdentifier, callerCallFrame->lexicalGlobalObject()->profileGroup());
+}
+
+void Profiler::didExecute(ExecState* callerCallFrame, JSValue function)
+{
+    ASSERT(!m_currentProfiles.isEmpty());
+
+    dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(callerCallFrame, function, "", 0), callerCallFrame->lexicalGlobalObject()->profileGroup());
+}
+
+void Profiler::didExecute(ExecState* callerCallFrame, const UString& sourceURL, int startingLineNumber)
+{
+    ASSERT(!m_currentProfiles.isEmpty());
+
+    dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(callerCallFrame, JSValue(), sourceURL, startingLineNumber), callerCallFrame->lexicalGlobalObject()->profileGroup());
+}
+
+void Profiler::exceptionUnwind(ExecState* handlerCallFrame)
+{
+    ASSERT(!m_currentProfiles.isEmpty());
+
+    dispatchFunctionToProfiles(handlerCallFrame, m_currentProfiles, &ProfileGenerator::exceptionUnwind, createCallIdentifier(handlerCallFrame, JSValue(), "", 0), handlerCallFrame->lexicalGlobalObject()->profileGroup());
+}
+
+CallIdentifier Profiler::createCallIdentifier(ExecState* exec, JSValue functionValue, const UString& defaultSourceURL, int defaultLineNumber)
+{
+    if (!functionValue)
+        return CallIdentifier(GlobalCodeExecution, defaultSourceURL, defaultLineNumber);
+    if (!functionValue.isObject())
+        return CallIdentifier("(unknown)", defaultSourceURL, defaultLineNumber);
+    if (asObject(functionValue)->inherits(&JSFunction::s_info)) {
+        JSFunction* function = asFunction(functionValue);
+        if (!function->executable()->isHostFunction())
+            return createCallIdentifierFromFunctionImp(exec, function);
+    }
+    if (asObject(functionValue)->inherits(&JSFunction::s_info))
+        return CallIdentifier(static_cast<JSFunction*>(asObject(functionValue))->name(exec), defaultSourceURL, defaultLineNumber);
+    if (asObject(functionValue)->inherits(&InternalFunction::s_info))
+        return CallIdentifier(static_cast<InternalFunction*>(asObject(functionValue))->name(exec), defaultSourceURL, defaultLineNumber);
+    return CallIdentifier(makeUString("(", asObject(functionValue)->methodTable()->className(asObject(functionValue)), " object)"), defaultSourceURL, defaultLineNumber);
+}
+
+CallIdentifier createCallIdentifierFromFunctionImp(ExecState* exec, JSFunction* function)
+{
+    ASSERT(!function->isHostFunction());
+    const UString& name = function->calculatedDisplayName(exec);
+    return CallIdentifier(name.isEmpty() ? AnonymousFunction : name, function->jsExecutable()->sourceURL(), function->jsExecutable()->lineNo());
+}
+
+} // namespace JSC