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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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93 // variety of ASLR modes (PAE kernel, NX compat mode, etc). | 93 // variety of ASLR modes (PAE kernel, NX compat mode, etc). |
94 raw_addr &= 0x3ffff000; | 94 raw_addr &= 0x3ffff000; |
95 raw_addr += 0x20000000; | 95 raw_addr += 0x20000000; |
96 #endif | 96 #endif |
97 return reinterpret_cast<void*>(raw_addr); | 97 return reinterpret_cast<void*>(raw_addr); |
98 } | 98 } |
99 return NULL; | 99 return NULL; |
100 } | 100 } |
101 | 101 |
102 | 102 |
103 void OS::PostSetUp() { | |
104 POSIXPostSetUp(); | |
105 } | |
106 | |
107 | |
108 uint64_t OS::CpuFeaturesImpliedByPlatform() { | 103 uint64_t OS::CpuFeaturesImpliedByPlatform() { |
109 return 0; | 104 return 0; |
110 } | 105 } |
111 | 106 |
112 | 107 |
113 int OS::ActivationFrameAlignment() { | 108 int OS::ActivationFrameAlignment() { |
114 // With gcc 4.4 the tree vectorization optimizer can generate code | 109 // With gcc 4.4 the tree vectorization optimizer can generate code |
115 // that requires 16 byte alignment such as movdqa on x86. | 110 // that requires 16 byte alignment such as movdqa on x86. |
116 return 16; | 111 return 16; |
117 } | 112 } |
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153 Max(highest_ever_allocated, | 148 Max(highest_ever_allocated, |
154 reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); | 149 reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); |
155 } | 150 } |
156 | 151 |
157 | 152 |
158 bool OS::IsOutsideAllocatedSpace(void* address) { | 153 bool OS::IsOutsideAllocatedSpace(void* address) { |
159 return address < lowest_ever_allocated || address >= highest_ever_allocated; | 154 return address < lowest_ever_allocated || address >= highest_ever_allocated; |
160 } | 155 } |
161 | 156 |
162 | 157 |
163 size_t OS::AllocateAlignment() { | |
164 return sysconf(_SC_PAGESIZE); | |
165 } | |
166 | |
167 | |
168 void* OS::Allocate(const size_t requested, | 158 void* OS::Allocate(const size_t requested, |
169 size_t* allocated, | 159 size_t* allocated, |
170 bool is_executable) { | 160 bool is_executable) { |
171 const size_t msize = RoundUp(requested, AllocateAlignment()); | 161 const size_t msize = RoundUp(requested, AllocateAlignment()); |
172 int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); | 162 int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); |
173 void* addr = GetRandomMmapAddr(); | 163 void* addr = GetRandomMmapAddr(); |
174 void* mbase = mmap(addr, msize, prot, MAP_PRIVATE | MAP_ANON, -1, 0); | 164 void* mbase = mmap(addr, msize, prot, MAP_PRIVATE | MAP_ANON, -1, 0); |
175 if (mbase == MAP_FAILED) { | 165 if (mbase == MAP_FAILED) { |
176 LOG(i::Isolate::Current(), | 166 LOG(i::Isolate::Current(), |
177 StringEvent("OS::Allocate", "mmap failed")); | 167 StringEvent("OS::Allocate", "mmap failed")); |
178 return NULL; | 168 return NULL; |
179 } | 169 } |
180 *allocated = msize; | 170 *allocated = msize; |
181 UpdateAllocatedSpaceLimits(mbase, msize); | 171 UpdateAllocatedSpaceLimits(mbase, msize); |
182 return mbase; | 172 return mbase; |
183 } | 173 } |
184 | 174 |
185 | 175 |
186 void OS::Free(void* address, const size_t size) { | |
187 // TODO(1240712): munmap has a return value which is ignored here. | |
188 int result = munmap(address, size); | |
189 USE(result); | |
190 ASSERT(result == 0); | |
191 } | |
192 | |
193 | |
194 void OS::Sleep(int milliseconds) { | |
195 unsigned int ms = static_cast<unsigned int>(milliseconds); | |
196 usleep(1000 * ms); | |
197 } | |
198 | |
199 | |
200 int OS::NumberOfCores() { | |
201 return sysconf(_SC_NPROCESSORS_ONLN); | |
202 } | |
203 | |
204 | |
205 void OS::Abort() { | |
206 // Redirect to std abort to signal abnormal program termination. | |
207 abort(); | |
208 } | |
209 | |
210 | |
211 void OS::DebugBreak() { | |
212 asm("int $3"); | |
213 } | |
214 | |
215 | |
216 void OS::DumpBacktrace() { | 176 void OS::DumpBacktrace() { |
217 // Currently unsupported. | 177 // Currently unsupported. |
218 } | 178 } |
219 | 179 |
220 | 180 |
221 class PosixMemoryMappedFile : public OS::MemoryMappedFile { | 181 class PosixMemoryMappedFile : public OS::MemoryMappedFile { |
222 public: | 182 public: |
223 PosixMemoryMappedFile(FILE* file, void* memory, int size) | 183 PosixMemoryMappedFile(FILE* file, void* memory, int size) |
224 : file_(file), memory_(memory), size_(size) { } | 184 : file_(file), memory_(memory), size_(size) { } |
225 virtual ~PosixMemoryMappedFile(); | 185 virtual ~PosixMemoryMappedFile(); |
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683 limit_mutex = CreateMutex(); | 643 limit_mutex = CreateMutex(); |
684 } | 644 } |
685 | 645 |
686 | 646 |
687 void OS::TearDown() { | 647 void OS::TearDown() { |
688 delete limit_mutex; | 648 delete limit_mutex; |
689 } | 649 } |
690 | 650 |
691 | 651 |
692 } } // namespace v8::internal | 652 } } // namespace v8::internal |
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