| | 1 | /* |
| | 2 | * Copyright (C) 1999-2000 Harri Porten (porten@kde.org) |
| | 3 | * Copyright (C) 2001 Peter Kelly (pmk@post.com) |
| | 4 | * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. |
| | 5 | * |
| | 6 | * This library is free software; you can redistribute it and/or |
| | 7 | * modify it under the terms of the GNU Lesser General Public |
| | 8 | * License as published by the Free Software Foundation; either |
| | 9 | * version 2 of the License, or (at your option) any later version. |
| | 10 | * |
| | 11 | * This library is distributed in the hope that it will be useful, |
| | 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| | 14 | * Lesser General Public License for more details. |
| | 15 | * |
| | 16 | * You should have received a copy of the GNU Lesser General Public |
| | 17 | * License along with this library; if not, write to the Free Software |
| | 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| | 19 | * |
| | 20 | */ |
| | 21 | |
| | 22 | #ifndef MachineThreads_h |
| | 23 | #define MachineThreads_h |
| | 24 | |
| | 25 | #include <setjmp.h> |
| | 26 | #include <wtf/Noncopyable.h> |
| | 27 | #include <wtf/ThreadSpecific.h> |
| | 28 | #include <wtf/ThreadingPrimitives.h> |
| | 29 | |
| | 30 | namespace JSC { |
| | 31 | |
| | 32 | class CodeBlockSet; |
| | 33 | class ConservativeRoots; |
| | 34 | class Heap; |
| | 35 | class JITStubRoutineSet; |
| | 36 | |
| | 37 | class MachineThreads { |
| | 38 | WTF_MAKE_NONCOPYABLE(MachineThreads); |
| | 39 | public: |
| | 40 | typedef jmp_buf RegisterState; |
| | 41 | |
| | 42 | MachineThreads(Heap*); |
| | 43 | ~MachineThreads(); |
| | 44 | |
| | 45 | void gatherConservativeRoots(ConservativeRoots&, JITStubRoutineSet&, CodeBlockSet&, void* stackOrigin, void* stackTop, RegisterState& calleeSavedRegisters); |
| | 46 | |
| | 47 | JS_EXPORT_PRIVATE void addCurrentThread(); // Only needs to be called by clients that can use the same heap from multiple threads. |
| | 48 | |
| | 49 | private: |
| | 50 | class Thread; |
| | 51 | |
| | 52 | void gatherFromCurrentThread(ConservativeRoots&, JITStubRoutineSet&, CodeBlockSet&, void* stackOrigin, void* stackTop, RegisterState& calleeSavedRegisters); |
| | 53 | |
| | 54 | void tryCopyOtherThreadStack(Thread*, void*, size_t capacity, size_t*); |
| | 55 | bool tryCopyOtherThreadStacks(MutexLocker&, void*, size_t capacity, size_t*); |
| | 56 | |
| | 57 | static void removeThread(void*); |
| | 58 | |
| | 59 | template<typename PlatformThread> |
| | 60 | void removeThreadIfFound(PlatformThread); |
| | 61 | |
| | 62 | Mutex m_registeredThreadsMutex; |
| | 63 | Thread* m_registeredThreads; |
| | 64 | WTF::ThreadSpecificKey m_threadSpecific; |
| | 65 | #if !ASSERT_DISABLED |
| | 66 | Heap* m_heap; |
| | 67 | #endif |
| | 68 | }; |
| | 69 | |
| | 70 | } // namespace JSC |
| | 71 | |
| | 72 | #if COMPILER(GCC) |
| | 73 | #define REGISTER_BUFFER_ALIGNMENT __attribute__ ((aligned (sizeof(void*)))) |
| | 74 | #else |
| | 75 | #define REGISTER_BUFFER_ALIGNMENT |
| | 76 | #endif |
| | 77 | |
| | 78 | // ALLOCATE_AND_GET_REGISTER_STATE() is a macro so that it is always "inlined" even in debug builds. |
| | 79 | #if COMPILER(MSVC) |
| | 80 | #pragma warning(push) |
| | 81 | #pragma warning(disable: 4611) |
| | 82 | #define ALLOCATE_AND_GET_REGISTER_STATE(registers) \ |
| | 83 | MachineThreads::RegisterState registers REGISTER_BUFFER_ALIGNMENT; \ |
| | 84 | setjmp(registers) |
| | 85 | #pragma warning(pop) |
| | 86 | #else |
| | 87 | #define ALLOCATE_AND_GET_REGISTER_STATE(registers) \ |
| | 88 | MachineThreads::RegisterState registers REGISTER_BUFFER_ALIGNMENT; \ |
| | 89 | setjmp(registers) |
| | 90 | #endif |
| | 91 | |
| | 92 | #endif // MachineThreads_h |
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