JavaScriptCore-1097.3.tar.gz

[apple/javascriptcore.git] / tools / CodeProfiling.h

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+/*
+ * Copyright (C) 2012 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. 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. 
+ */
+
+#ifndef CodeProfiling_h
+#define CodeProfiling_h
+
+namespace WTF {
+
+class MetaAllocator;
+class MetaAllocatorTracker;
+
+}
+
+namespace JSC {
+
+class CodeProfile;
+class SourceCode;
+
+class CodeProfiling {
+    enum Mode {
+        Disabled,
+        Enabled,
+        Verbose,
+        VeryVerbose
+    };
+
+public:
+    CodeProfiling(const SourceCode& source)
+        : m_active(enabled())
+    {
+        if (m_active)
+            begin(source);
+    }
+
+    ~CodeProfiling()
+    {
+        if (m_active)
+            end();
+    }
+
+    static bool enabled() { return s_mode != Disabled; }
+    static bool beVerbose() { return s_mode >= Verbose; }
+    static bool beVeryVerbose() { return s_mode >= VeryVerbose; }
+
+    static void notifyAllocator(WTF::MetaAllocator*);
+    static void* getOwnerUIDForPC(void*);
+    static void sample(void* pc, void** framePointer);
+
+private:
+    void begin(const SourceCode&);
+    void end();
+
+    bool m_active;
+
+    static Mode s_mode;
+    static WTF::MetaAllocatorTracker* s_tracker;
+    static volatile CodeProfile* s_profileStack;
+};
+
+}
+
+#endif // CodeProfiling_h
+