18e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project/* 28e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Copyright (C) 2008 Apple Inc. All rights reserved. 38e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 48e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Redistribution and use in source and binary forms, with or without 58e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * modification, are permitted provided that the following conditions 68e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * are met: 78e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 88e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 98e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * notice, this list of conditions and the following disclaimer. 108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * documentation and/or other materials provided with the distribution. 138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * its contributors may be used to endorse or promote products derived 158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * from this software without specific prior written permission. 168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 198e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 268e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project */ 288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 29635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project#ifndef Label_h 30635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project#define Label_h 318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "CodeBlock.h" 338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "Instruction.h" 348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <wtf/Assertions.h> 358e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <wtf/Vector.h> 368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <limits.h> 378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 388e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectnamespace JSC { 398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 40635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project class Label { 418e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project public: 42635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project explicit Label(CodeBlock* codeBlock) 438e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project : m_refCount(0) 448e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project , m_location(invalidLocation) 458e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project , m_codeBlock(codeBlock) 468e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project { 478e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 488e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 498e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project void setLocation(unsigned location) 508e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project { 518e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_location = location; 528e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 538e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project unsigned size = m_unresolvedJumps.size(); 54cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block for (unsigned i = 0; i < size; ++i) 55cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block m_codeBlock->instructions()[m_unresolvedJumps[i].second].u.operand = m_location - m_unresolvedJumps[i].first; 568e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 578e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 58cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block int bind(int opcode, int offset) const 598e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project { 608e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (m_location == invalidLocation) { 61cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block m_unresolvedJumps.append(std::make_pair(opcode, offset)); 628e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return 0; 638e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 64cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block return m_location - opcode; 658e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 668e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 67635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project void ref() { ++m_refCount; } 688e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project void deref() 698e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project { 708e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project --m_refCount; 718e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project ASSERT(m_refCount >= 0); 728e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 73635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project int refCount() const { return m_refCount; } 748e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 75635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project bool isForward() const { return m_location == invalidLocation; } 768e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 778e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project private: 78cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block typedef Vector<std::pair<int, int>, 8> JumpVector; 798e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 808e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project static const unsigned invalidLocation = UINT_MAX; 818e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 828e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int m_refCount; 838e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project unsigned m_location; 848e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project CodeBlock* m_codeBlock; 858e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project mutable JumpVector m_unresolvedJumps; 868e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project }; 878e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 888e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} // namespace JSC 898e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 90635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project#endif // Label_h 91