1/* 2 * Copyright (C) 2012 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef CodeProfiling_h 27#define CodeProfiling_h 28 29namespace WTF { 30 31class MetaAllocator; 32class MetaAllocatorTracker; 33 34} 35 36namespace JSC { 37 38class CodeProfile; 39class SourceCode; 40 41class CodeProfiling { 42 enum Mode { 43 Disabled, 44 Enabled, 45 Verbose, 46 VeryVerbose 47 }; 48 49public: 50 CodeProfiling(const SourceCode& source) 51 : m_active(enabled()) 52 { 53 if (m_active) 54 begin(source); 55 } 56 57 ~CodeProfiling() 58 { 59 if (m_active) 60 end(); 61 } 62 63 static bool enabled() { return s_mode != Disabled; } 64 static bool beVerbose() { return s_mode >= Verbose; } 65 static bool beVeryVerbose() { return s_mode >= VeryVerbose; } 66 67 static void notifyAllocator(WTF::MetaAllocator*); 68 static void* getOwnerUIDForPC(void*); 69 static void sample(void* pc, void** framePointer); 70 71private: 72 void begin(const SourceCode&); 73 void end(); 74 75 bool m_active; 76 77 static Mode s_mode; 78 static WTF::MetaAllocatorTracker* s_tracker; 79 static volatile CodeProfile* s_profileStack; 80}; 81 82} 83 84#endif // CodeProfiling_h 85 86