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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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| 73 return -0.0; | 73 return -0.0; |
| 74 } else { | 74 } else { |
| 75 return ceil(x); | 75 return ceil(x); |
| 76 } | 76 } |
| 77 } | 77 } |
| 78 | 78 |
| 79 | 79 |
| 80 static Mutex* limit_mutex = NULL; | 80 static Mutex* limit_mutex = NULL; |
| 81 | 81 |
| 82 | 82 |
| 83 void OS::PostSetUp() { | |
| 84 POSIXPostSetUp(); | |
| 85 } | |
| 86 | |
| 87 | |
| 88 uint64_t OS::CpuFeaturesImpliedByPlatform() { | 83 uint64_t OS::CpuFeaturesImpliedByPlatform() { |
| 89 return 0; // FreeBSD runs on anything. | 84 return 0; // FreeBSD runs on anything. |
| 90 } | 85 } |
| 91 | 86 |
| 92 | 87 |
| 93 int OS::ActivationFrameAlignment() { | 88 int OS::ActivationFrameAlignment() { |
| 94 // 16 byte alignment on FreeBSD | 89 // 16 byte alignment on FreeBSD |
| 95 return 16; | 90 return 16; |
| 96 } | 91 } |
| 97 | 92 |
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| 132 Max(highest_ever_allocated, | 127 Max(highest_ever_allocated, |
| 133 reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); | 128 reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); |
| 134 } | 129 } |
| 135 | 130 |
| 136 | 131 |
| 137 bool OS::IsOutsideAllocatedSpace(void* address) { | 132 bool OS::IsOutsideAllocatedSpace(void* address) { |
| 138 return address < lowest_ever_allocated || address >= highest_ever_allocated; | 133 return address < lowest_ever_allocated || address >= highest_ever_allocated; |
| 139 } | 134 } |
| 140 | 135 |
| 141 | 136 |
| 142 size_t OS::AllocateAlignment() { | |
| 143 return getpagesize(); | |
| 144 } | |
| 145 | |
| 146 | |
| 147 void* OS::Allocate(const size_t requested, | 137 void* OS::Allocate(const size_t requested, |
| 148 size_t* allocated, | 138 size_t* allocated, |
| 149 bool executable) { | 139 bool executable) { |
| 150 const size_t msize = RoundUp(requested, getpagesize()); | 140 const size_t msize = RoundUp(requested, getpagesize()); |
| 151 int prot = PROT_READ | PROT_WRITE | (executable ? PROT_EXEC : 0); | 141 int prot = PROT_READ | PROT_WRITE | (executable ? PROT_EXEC : 0); |
| 152 void* mbase = mmap(NULL, msize, prot, MAP_PRIVATE | MAP_ANON, -1, 0); | 142 void* mbase = mmap(NULL, msize, prot, MAP_PRIVATE | MAP_ANON, -1, 0); |
| 153 | 143 |
| 154 if (mbase == MAP_FAILED) { | 144 if (mbase == MAP_FAILED) { |
| 155 LOG(ISOLATE, StringEvent("OS::Allocate", "mmap failed")); | 145 LOG(ISOLATE, StringEvent("OS::Allocate", "mmap failed")); |
| 156 return NULL; | 146 return NULL; |
| 157 } | 147 } |
| 158 *allocated = msize; | 148 *allocated = msize; |
| 159 UpdateAllocatedSpaceLimits(mbase, msize); | 149 UpdateAllocatedSpaceLimits(mbase, msize); |
| 160 return mbase; | 150 return mbase; |
| 161 } | 151 } |
| 162 | 152 |
| 163 | 153 |
| 164 void OS::Free(void* buf, const size_t length) { | |
| 165 // TODO(1240712): munmap has a return value which is ignored here. | |
| 166 int result = munmap(buf, length); | |
| 167 USE(result); | |
| 168 ASSERT(result == 0); | |
| 169 } | |
| 170 | |
| 171 | |
| 172 void OS::Sleep(int milliseconds) { | |
| 173 unsigned int ms = static_cast<unsigned int>(milliseconds); | |
| 174 usleep(1000 * ms); | |
| 175 } | |
| 176 | |
| 177 | |
| 178 int OS::NumberOfCores() { | |
| 179 return sysconf(_SC_NPROCESSORS_ONLN); | |
| 180 } | |
| 181 | |
| 182 | |
| 183 void OS::Abort() { | |
| 184 // Redirect to std abort to signal abnormal program termination. | |
| 185 abort(); | |
| 186 } | |
| 187 | |
| 188 | |
| 189 void OS::DebugBreak() { | |
| 190 #if (defined(__arm__) || defined(__thumb__)) | |
| 191 asm("bkpt 0"); | |
| 192 #else | |
| 193 asm("int $3"); | |
| 194 #endif | |
| 195 } | |
| 196 | |
| 197 | |
| 198 void OS::DumpBacktrace() { | 154 void OS::DumpBacktrace() { |
| 199 POSIXBacktraceHelper<backtrace, backtrace_symbols>::DumpBacktrace(); | 155 POSIXBacktraceHelper<backtrace, backtrace_symbols>::DumpBacktrace(); |
| 200 } | 156 } |
| 201 | 157 |
| 202 | 158 |
| 203 class PosixMemoryMappedFile : public OS::MemoryMappedFile { | 159 class PosixMemoryMappedFile : public OS::MemoryMappedFile { |
| 204 public: | 160 public: |
| 205 PosixMemoryMappedFile(FILE* file, void* memory, int size) | 161 PosixMemoryMappedFile(FILE* file, void* memory, int size) |
| 206 : file_(file), memory_(memory), size_(size) { } | 162 : file_(file), memory_(memory), size_(size) { } |
| 207 virtual ~PosixMemoryMappedFile(); | 163 virtual ~PosixMemoryMappedFile(); |
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| 592 limit_mutex = CreateMutex(); | 548 limit_mutex = CreateMutex(); |
| 593 } | 549 } |
| 594 | 550 |
| 595 | 551 |
| 596 void OS::TearDown() { | 552 void OS::TearDown() { |
| 597 delete limit_mutex; | 553 delete limit_mutex; |
| 598 } | 554 } |
| 599 | 555 |
| 600 | 556 |
| 601 } } // namespace v8::internal | 557 } } // namespace v8::internal |
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