| Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/qtdeclarative/src/qtdeclarative/src/3rdparty/masm/stubs/ExecutableAllocator.h |
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| 1 | /**************************************************************************** | - | ||||||
| 2 | ** | - | ||||||
| 3 | ** Copyright (C) 2016 The Qt Company Ltd. | - | ||||||
| 4 | ** Contact: https://www.qt.io/licensing/ | - | ||||||
| 5 | ** | - | ||||||
| 6 | ** This file is part of the QtQml module of the Qt Toolkit. | - | ||||||
| 7 | ** | - | ||||||
| 8 | ** $QT_BEGIN_LICENSE:LGPL$ | - | ||||||
| 9 | ** Commercial License Usage | - | ||||||
| 10 | ** Licensees holding valid commercial Qt licenses may use this file in | - | ||||||
| 11 | ** accordance with the commercial license agreement provided with the | - | ||||||
| 12 | ** Software or, alternatively, in accordance with the terms contained in | - | ||||||
| 13 | ** a written agreement between you and The Qt Company. For licensing terms | - | ||||||
| 14 | ** and conditions see https://www.qt.io/terms-conditions. For further | - | ||||||
| 15 | ** information use the contact form at https://www.qt.io/contact-us. | - | ||||||
| 16 | ** | - | ||||||
| 17 | ** GNU Lesser General Public License Usage | - | ||||||
| 18 | ** Alternatively, this file may be used under the terms of the GNU Lesser | - | ||||||
| 19 | ** General Public License version 3 as published by the Free Software | - | ||||||
| 20 | ** Foundation and appearing in the file LICENSE.LGPL3 included in the | - | ||||||
| 21 | ** packaging of this file. Please review the following information to | - | ||||||
| 22 | ** ensure the GNU Lesser General Public License version 3 requirements | - | ||||||
| 23 | ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. | - | ||||||
| 24 | ** | - | ||||||
| 25 | ** GNU General Public License Usage | - | ||||||
| 26 | ** Alternatively, this file may be used under the terms of the GNU | - | ||||||
| 27 | ** General Public License version 2.0 or (at your option) the GNU General | - | ||||||
| 28 | ** Public license version 3 or any later version approved by the KDE Free | - | ||||||
| 29 | ** Qt Foundation. The licenses are as published by the Free Software | - | ||||||
| 30 | ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 | - | ||||||
| 31 | ** included in the packaging of this file. Please review the following | - | ||||||
| 32 | ** information to ensure the GNU General Public License requirements will | - | ||||||
| 33 | ** be met: https://www.gnu.org/licenses/gpl-2.0.html and | - | ||||||
| 34 | ** https://www.gnu.org/licenses/gpl-3.0.html. | - | ||||||
| 35 | ** | - | ||||||
| 36 | ** $QT_END_LICENSE$ | - | ||||||
| 37 | ** | - | ||||||
| 38 | ****************************************************************************/ | - | ||||||
| 39 | #ifndef MASM_EXECUTABLEALLOCATOR_H | - | ||||||
| 40 | #define MASM_EXECUTABLEALLOCATOR_H | - | ||||||
| 41 | - | |||||||
| 42 | #include <RefPtr.h> | - | ||||||
| 43 | #include <RefCounted.h> | - | ||||||
| 44 | #include <wtf/PageBlock.h> | - | ||||||
| 45 | - | |||||||
| 46 | #include <private/qv4executableallocator_p.h> | - | ||||||
| 47 | - | |||||||
| 48 | #if OS(INTEGRITY) | - | ||||||
| 49 | #include "OSAllocator.h" | - | ||||||
| 50 | #endif | - | ||||||
| 51 | - | |||||||
| 52 | #if OS(WINDOWS) | - | ||||||
| 53 | #include <windows.h> | - | ||||||
| 54 | #else | - | ||||||
| 55 | #include <sys/mman.h> | - | ||||||
| 56 | #include <unistd.h> | - | ||||||
| 57 | #endif | - | ||||||
| 58 | - | |||||||
| 59 | #ifdef __QNXNTO__ | - | ||||||
| 60 | using std::perror; | - | ||||||
| 61 | #endif | - | ||||||
| 62 | - | |||||||
| 63 | namespace JSC { | - | ||||||
| 64 | - | |||||||
| 65 | class JSGlobalData; | - | ||||||
| 66 | - | |||||||
| 67 | struct ExecutableMemoryHandle : public RefCounted<ExecutableMemoryHandle> { | - | ||||||
| 68 | ExecutableMemoryHandle(QV4::ExecutableAllocator *allocator, size_t size) | - | ||||||
| 69 | : m_allocator(allocator) | - | ||||||
| 70 | , m_size(size) | - | ||||||
| 71 | { | - | ||||||
| 72 | m_allocation = allocator->allocate(size); | - | ||||||
| 73 | } executed 1163946 times by 153 tests: end of blockExecuted by:
| 1163946 | ||||||
| 74 | ~ExecutableMemoryHandle() | - | ||||||
| 75 | { | - | ||||||
| 76 | m_allocation->deallocate(m_allocator); | - | ||||||
| 77 | } executed 1164520 times by 153 tests: end of blockExecuted by:
| 1164520 | ||||||
| 78 | - | |||||||
| 79 | inline void shrink(size_t) { | - | ||||||
| 80 | // ### TODO. | - | ||||||
| 81 | } | - | ||||||
| 82 | - | |||||||
| 83 | inline bool isManaged() const { return true; } executed 1164590 times by 153 tests: return true;Executed by:
| 1164590 | ||||||
| 84 | - | |||||||
| 85 | void* start() { return m_allocation->start(); } executed 5821358 times by 153 tests: return m_allocation->start();Executed by:
| 5821358 | ||||||
| 86 | size_t sizeInBytes() { return m_size; } executed 2337898 times by 153 tests: return m_size;Executed by:
| 2337898 | ||||||
| 87 | - | |||||||
| 88 | QV4::ExecutableAllocator::ChunkOfPages *chunk() const | - | ||||||
| 89 | { return m_allocator->chunkForAllocation(m_allocation); } never executed: return m_allocator->chunkForAllocation(m_allocation); | 0 | ||||||
| 90 | - | |||||||
| 91 | QV4::ExecutableAllocator *m_allocator; | - | ||||||
| 92 | QV4::ExecutableAllocator::Allocation *m_allocation; | - | ||||||
| 93 | size_t m_size; | - | ||||||
| 94 | }; | - | ||||||
| 95 | - | |||||||
| 96 | struct ExecutableAllocator { | - | ||||||
| 97 | ExecutableAllocator(QV4::ExecutableAllocator *alloc) | - | ||||||
| 98 | : realAllocator(alloc) | - | ||||||
| 99 | {} executed 1162840 times by 153 tests: end of blockExecuted by:
| 1162840 | ||||||
| 100 | - | |||||||
| 101 | PassRefPtr<ExecutableMemoryHandle> allocate(JSGlobalData&, size_t size, void*, int) | - | ||||||
| 102 | { | - | ||||||
| 103 | return adoptRef(new ExecutableMemoryHandle(realAllocator, size)); executed 1160949 times by 153 tests: return adoptRef(new ExecutableMemoryHandle(realAllocator, size));Executed by:
| 1160949 | ||||||
| 104 | } | - | ||||||
| 105 | - | |||||||
| 106 | static void makeWritable(void* addr, size_t size) | - | ||||||
| 107 | { | - | ||||||
| 108 | quintptr pageSize = WTF::pageSize(); | - | ||||||
| 109 | quintptr iaddr = reinterpret_cast<quintptr>(addr); | - | ||||||
| 110 | quintptr roundAddr = iaddr & ~(pageSize - 1); | - | ||||||
| 111 | size = size + (iaddr - roundAddr); | - | ||||||
| 112 | addr = reinterpret_cast<void*>(roundAddr); | - | ||||||
| 113 | - | |||||||
| 114 | #if ENABLE(ASSEMBLER_WX_EXCLUSIVE) && !defined(V4_BOOTSTRAP) | - | ||||||
| 115 | # if OS(WINDOWS) | - | ||||||
| 116 | DWORD oldProtect; | - | ||||||
| 117 | # if !OS(WINRT) | - | ||||||
| 118 | VirtualProtect(addr, size, PAGE_READWRITE, &oldProtect); | - | ||||||
| 119 | # else | - | ||||||
| 120 | bool hr = VirtualProtectFromApp(addr, size, PAGE_READWRITE, &oldProtect); | - | ||||||
| 121 | if (!hr) { | - | ||||||
| 122 | Q_UNREACHABLE(); | - | ||||||
| 123 | } | - | ||||||
| 124 | # endif | - | ||||||
| 125 | # elif OS(INTEGRITY) | - | ||||||
| 126 | OSAllocator::setMemoryAttributes(addr, /*writable*/ true, /*executable*/ false); | - | ||||||
| 127 | # else | - | ||||||
| 128 | int mode = PROT_READ | PROT_WRITE; | - | ||||||
| 129 | if (mprotect(addr, size, mode) != 0) {
| 0-1164377 | ||||||
| 130 | perror("mprotect failed in ExecutableAllocator::makeWritable"); | - | ||||||
| 131 | Q_UNREACHABLE(); | - | ||||||
| 132 | } never executed: end of block | 0 | ||||||
| 133 | # endif | - | ||||||
| 134 | #else | - | ||||||
| 135 | // We assume we already have RWX | - | ||||||
| 136 | (void)addr; // suppress unused parameter warning | - | ||||||
| 137 | (void)size; // suppress unused parameter warning | - | ||||||
| 138 | #endif | - | ||||||
| 139 | } executed 1164392 times by 153 tests: end of blockExecuted by:
| 1164392 | ||||||
| 140 | - | |||||||
| 141 | static void makeExecutable(void* addr, size_t size) | - | ||||||
| 142 | { | - | ||||||
| 143 | quintptr pageSize = WTF::pageSize(); | - | ||||||
| 144 | quintptr iaddr = reinterpret_cast<quintptr>(addr); | - | ||||||
| 145 | quintptr roundAddr = iaddr & ~(pageSize - 1); | - | ||||||
| 146 | size = size + (iaddr - roundAddr); | - | ||||||
| 147 | addr = reinterpret_cast<void*>(roundAddr); | - | ||||||
| 148 | - | |||||||
| 149 | #if !defined(V4_BOOTSTRAP) | - | ||||||
| 150 | #if ENABLE(ASSEMBLER_WX_EXCLUSIVE) | - | ||||||
| 151 | # if OS(WINDOWS) | - | ||||||
| 152 | DWORD oldProtect; | - | ||||||
| 153 | # if !OS(WINRT) | - | ||||||
| 154 | VirtualProtect(addr, size, PAGE_EXECUTE_READ, &oldProtect); | - | ||||||
| 155 | # else | - | ||||||
| 156 | bool hr = VirtualProtectFromApp(addr, size, PAGE_EXECUTE_READ, &oldProtect); | - | ||||||
| 157 | if (!hr) { | - | ||||||
| 158 | Q_UNREACHABLE(); | - | ||||||
| 159 | } | - | ||||||
| 160 | # endif | - | ||||||
| 161 | # elif OS(INTEGRITY) | - | ||||||
| 162 | OSAllocator::setMemoryAttributes(addr, /*writable*/ false, /*executable*/ true); | - | ||||||
| 163 | # else | - | ||||||
| 164 | int mode = PROT_READ | PROT_EXEC; | - | ||||||
| 165 | if (mprotect(addr, size, mode) != 0) {
| 0-1164555 | ||||||
| 166 | perror("mprotect failed in ExecutableAllocator::makeExecutable"); | - | ||||||
| 167 | Q_UNREACHABLE(); | - | ||||||
| 168 | } never executed: end of block | 0 | ||||||
| 169 | # endif | - | ||||||
| 170 | #else | - | ||||||
| 171 | # error "Only W^X is supported" | - | ||||||
| 172 | #endif | - | ||||||
| 173 | #else | - | ||||||
| 174 | (void)addr; // suppress unused parameter warning | - | ||||||
| 175 | (void)size; // suppress unused parameter warning | - | ||||||
| 176 | #endif | - | ||||||
| 177 | } executed 1164564 times by 153 tests: end of blockExecuted by:
| 1164564 | ||||||
| 178 | - | |||||||
| 179 | QV4::ExecutableAllocator *realAllocator; | - | ||||||
| 180 | }; | - | ||||||
| 181 | - | |||||||
| 182 | } | - | ||||||
| 183 | - | |||||||
| 184 | #endif // MASM_EXECUTABLEALLOCATOR_H | - | ||||||
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