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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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81 | 81 |
82 | 82 |
83 double ceiling(double x) { | 83 double ceiling(double x) { |
84 return ceil(x); | 84 return ceil(x); |
85 } | 85 } |
86 | 86 |
87 | 87 |
88 static Mutex* limit_mutex = NULL; | 88 static Mutex* limit_mutex = NULL; |
89 | 89 |
90 | 90 |
91 void OS::PostSetUp() { | |
92 POSIXPostSetUp(); | |
93 } | |
94 | |
95 | |
96 uint64_t OS::CpuFeaturesImpliedByPlatform() { | 91 uint64_t OS::CpuFeaturesImpliedByPlatform() { |
97 return 0; // Linux runs on anything. | 92 return 0; // Linux runs on anything. |
98 } | 93 } |
99 | 94 |
100 | 95 |
101 #ifdef __arm__ | 96 #ifdef __arm__ |
102 static bool CPUInfoContainsString(const char * search_string) { | 97 static bool CPUInfoContainsString(const char * search_string) { |
103 const char* file_name = "/proc/cpuinfo"; | 98 const char* file_name = "/proc/cpuinfo"; |
104 // This is written as a straight shot one pass parser | 99 // This is written as a straight shot one pass parser |
105 // and not using STL string and ifstream because, | 100 // and not using STL string and ifstream because, |
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377 Max(highest_ever_allocated, | 372 Max(highest_ever_allocated, |
378 reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); | 373 reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); |
379 } | 374 } |
380 | 375 |
381 | 376 |
382 bool OS::IsOutsideAllocatedSpace(void* address) { | 377 bool OS::IsOutsideAllocatedSpace(void* address) { |
383 return address < lowest_ever_allocated || address >= highest_ever_allocated; | 378 return address < lowest_ever_allocated || address >= highest_ever_allocated; |
384 } | 379 } |
385 | 380 |
386 | 381 |
387 size_t OS::AllocateAlignment() { | |
388 return sysconf(_SC_PAGESIZE); | |
389 } | |
390 | |
391 | |
392 void* OS::Allocate(const size_t requested, | 382 void* OS::Allocate(const size_t requested, |
393 size_t* allocated, | 383 size_t* allocated, |
394 bool is_executable) { | 384 bool is_executable) { |
395 const size_t msize = RoundUp(requested, AllocateAlignment()); | 385 const size_t msize = RoundUp(requested, AllocateAlignment()); |
396 int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); | 386 int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); |
397 void* addr = OS::GetRandomMmapAddr(); | 387 void* addr = OS::GetRandomMmapAddr(); |
398 void* mbase = mmap(addr, msize, prot, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | 388 void* mbase = mmap(addr, msize, prot, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
399 if (mbase == MAP_FAILED) { | 389 if (mbase == MAP_FAILED) { |
400 LOG(i::Isolate::Current(), | 390 LOG(i::Isolate::Current(), |
401 StringEvent("OS::Allocate", "mmap failed")); | 391 StringEvent("OS::Allocate", "mmap failed")); |
402 return NULL; | 392 return NULL; |
403 } | 393 } |
404 *allocated = msize; | 394 *allocated = msize; |
405 UpdateAllocatedSpaceLimits(mbase, msize); | 395 UpdateAllocatedSpaceLimits(mbase, msize); |
406 return mbase; | 396 return mbase; |
407 } | 397 } |
408 | 398 |
409 | 399 |
410 void OS::Free(void* address, const size_t size) { | |
411 // TODO(1240712): munmap has a return value which is ignored here. | |
412 int result = munmap(address, size); | |
413 USE(result); | |
414 ASSERT(result == 0); | |
415 } | |
416 | |
417 | |
418 void OS::Sleep(int milliseconds) { | |
419 unsigned int ms = static_cast<unsigned int>(milliseconds); | |
420 usleep(1000 * ms); | |
421 } | |
422 | |
423 | |
424 int OS::NumberOfCores() { | |
425 return sysconf(_SC_NPROCESSORS_ONLN); | |
426 } | |
427 | |
428 | |
429 void OS::Abort() { | |
430 // Redirect to std abort to signal abnormal program termination. | |
431 if (FLAG_break_on_abort) { | |
432 DebugBreak(); | |
433 } | |
434 abort(); | |
435 } | |
436 | |
437 | |
438 void OS::DebugBreak() { | |
439 // TODO(lrn): Introduce processor define for runtime system (!= V8_ARCH_x, | |
440 // which is the architecture of generated code). | |
441 #if (defined(__arm__) || defined(__thumb__)) | |
442 asm("bkpt 0"); | |
443 #elif defined(__mips__) | |
444 asm("break"); | |
445 #elif defined(__native_client__) | |
446 asm("hlt"); | |
447 #else | |
448 asm("int $3"); | |
449 #endif | |
450 } | |
451 | |
452 | |
453 void OS::DumpBacktrace() { | 400 void OS::DumpBacktrace() { |
454 // backtrace is a glibc extension. | 401 // backtrace is a glibc extension. |
455 #if defined(__GLIBC__) && !defined(__UCLIBC__) | 402 #if defined(__GLIBC__) && !defined(__UCLIBC__) |
456 POSIXBacktraceHelper<backtrace, backtrace_symbols>::DumpBacktrace(); | 403 POSIXBacktraceHelper<backtrace, backtrace_symbols>::DumpBacktrace(); |
457 #endif | 404 #endif |
458 } | 405 } |
459 | 406 |
460 | 407 |
461 class PosixMemoryMappedFile : public OS::MemoryMappedFile { | 408 class PosixMemoryMappedFile : public OS::MemoryMappedFile { |
462 public: | 409 public: |
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936 limit_mutex = CreateMutex(); | 883 limit_mutex = CreateMutex(); |
937 } | 884 } |
938 | 885 |
939 | 886 |
940 void OS::TearDown() { | 887 void OS::TearDown() { |
941 delete limit_mutex; | 888 delete limit_mutex; |
942 } | 889 } |
943 | 890 |
944 | 891 |
945 } } // namespace v8::internal | 892 } } // namespace v8::internal |
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