| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| // Platform specific code for POSIX goes here. This is not a platform on its |
| // own but contains the parts which are the same across POSIX platforms Linux, |
| // Mac OS, FreeBSD and OpenBSD. |
| |
| #include "platform-posix.h" |
| |
| #include <dlfcn.h> |
| #include <pthread.h> |
| #if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__) |
| #include <pthread_np.h> // for pthread_set_name_np |
| #endif |
| #include <sched.h> // for sched_yield |
| #include <unistd.h> |
| #include <errno.h> |
| #include <time.h> |
| |
| #include <sys/mman.h> |
| #include <sys/socket.h> |
| #include <sys/resource.h> |
| #include <sys/time.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #if defined(__linux__) |
| #include <sys/prctl.h> // for prctl |
| #endif |
| #if defined(__APPLE__) || defined(__DragonFly__) || defined(__FreeBSD__) || \ |
| defined(__NetBSD__) || defined(__OpenBSD__) |
| #include <sys/sysctl.h> // for sysctl |
| #endif |
| |
| #include <arpa/inet.h> |
| #include <netinet/in.h> |
| #include <netdb.h> |
| |
| #undef MAP_TYPE |
| |
| #if defined(ANDROID) && !defined(V8_ANDROID_LOG_STDOUT) |
| #define LOG_TAG "v8" |
| #include <android/log.h> |
| #endif |
| |
| #include "v8.h" |
| |
| #include "codegen.h" |
| #include "platform.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // 0 is never a valid thread id. |
| static const pthread_t kNoThread = (pthread_t) 0; |
| |
| |
| uint64_t OS::CpuFeaturesImpliedByPlatform() { |
| #if defined(__APPLE__) |
| // Mac OS X requires all these to install so we can assume they are present. |
| // These constants are defined by the CPUid instructions. |
| const uint64_t one = 1; |
| return (one << SSE2) | (one << CMOV) | (one << RDTSC) | (one << CPUID); |
| #else |
| return 0; // Nothing special about the other systems. |
| #endif |
| } |
| |
| |
| // Maximum size of the virtual memory. 0 means there is no artificial |
| // limit. |
| |
| intptr_t OS::MaxVirtualMemory() { |
| struct rlimit limit; |
| int result = getrlimit(RLIMIT_DATA, &limit); |
| if (result != 0) return 0; |
| return limit.rlim_cur; |
| } |
| |
| |
| int OS::ActivationFrameAlignment() { |
| #if V8_TARGET_ARCH_ARM |
| // On EABI ARM targets this is required for fp correctness in the |
| // runtime system. |
| return 8; |
| #elif V8_TARGET_ARCH_MIPS |
| return 8; |
| #else |
| // Otherwise we just assume 16 byte alignment, i.e.: |
| // - With gcc 4.4 the tree vectorization optimizer can generate code |
| // that requires 16 byte alignment such as movdqa on x86. |
| // - Mac OS X and Solaris (64-bit) activation frames must be 16 byte-aligned; |
| // see "Mac OS X ABI Function Call Guide" |
| return 16; |
| #endif |
| } |
| |
| |
| intptr_t OS::CommitPageSize() { |
| static intptr_t page_size = getpagesize(); |
| return page_size; |
| } |
| |
| |
| void OS::Free(void* address, const size_t size) { |
| // TODO(1240712): munmap has a return value which is ignored here. |
| int result = munmap(address, size); |
| USE(result); |
| ASSERT(result == 0); |
| } |
| |
| |
| // Get rid of writable permission on code allocations. |
| void OS::ProtectCode(void* address, const size_t size) { |
| #if defined(__CYGWIN__) |
| DWORD old_protect; |
| VirtualProtect(address, size, PAGE_EXECUTE_READ, &old_protect); |
| #elif defined(__native_client__) |
| // The Native Client port of V8 uses an interpreter, so |
| // code pages don't need PROT_EXEC. |
| mprotect(address, size, PROT_READ); |
| #else |
| mprotect(address, size, PROT_READ | PROT_EXEC); |
| #endif |
| } |
| |
| |
| // Create guard pages. |
| void OS::Guard(void* address, const size_t size) { |
| #if defined(__CYGWIN__) |
| DWORD oldprotect; |
| VirtualProtect(address, size, PAGE_READONLY | PAGE_GUARD, &oldprotect); |
| #else |
| mprotect(address, size, PROT_NONE); |
| #endif |
| } |
| |
| |
| void* OS::GetRandomMmapAddr() { |
| #if defined(__native_client__) |
| // TODO(bradchen): restore randomization once Native Client gets |
| // smarter about using mmap address hints. |
| // See http://code.google.com/p/nativeclient/issues/3341 |
| return NULL; |
| #endif |
| Isolate* isolate = Isolate::UncheckedCurrent(); |
| // Note that the current isolate isn't set up in a call path via |
| // CpuFeatures::Probe. We don't care about randomization in this case because |
| // the code page is immediately freed. |
| if (isolate != NULL) { |
| #if V8_TARGET_ARCH_X64 |
| uint64_t rnd1 = V8::RandomPrivate(isolate); |
| uint64_t rnd2 = V8::RandomPrivate(isolate); |
| uint64_t raw_addr = (rnd1 << 32) ^ rnd2; |
| // Currently available CPUs have 48 bits of virtual addressing. Truncate |
| // the hint address to 46 bits to give the kernel a fighting chance of |
| // fulfilling our placement request. |
| raw_addr &= V8_UINT64_C(0x3ffffffff000); |
| #else |
| uint32_t raw_addr = V8::RandomPrivate(isolate); |
| |
| raw_addr &= 0x3ffff000; |
| |
| # ifdef __sun |
| // For our Solaris/illumos mmap hint, we pick a random address in the bottom |
| // half of the top half of the address space (that is, the third quarter). |
| // Because we do not MAP_FIXED, this will be treated only as a hint -- the |
| // system will not fail to mmap() because something else happens to already |
| // be mapped at our random address. We deliberately set the hint high enough |
| // to get well above the system's break (that is, the heap); Solaris and |
| // illumos will try the hint and if that fails allocate as if there were |
| // no hint at all. The high hint prevents the break from getting hemmed in |
| // at low values, ceding half of the address space to the system heap. |
| raw_addr += 0x80000000; |
| # else |
| // The range 0x20000000 - 0x60000000 is relatively unpopulated across a |
| // variety of ASLR modes (PAE kernel, NX compat mode, etc) and on macos |
| // 10.6 and 10.7. |
| raw_addr += 0x20000000; |
| # endif |
| #endif |
| return reinterpret_cast<void*>(raw_addr); |
| } |
| return NULL; |
| } |
| |
| |
| size_t OS::AllocateAlignment() { |
| return getpagesize(); |
| } |
| |
| |
| void OS::Sleep(int milliseconds) { |
| useconds_t ms = static_cast<useconds_t>(milliseconds); |
| usleep(1000 * ms); |
| } |
| |
| |
| int OS::NumberOfCores() { |
| return sysconf(_SC_NPROCESSORS_ONLN); |
| } |
| |
| |
| void OS::Abort() { |
| // Redirect to std abort to signal abnormal program termination. |
| if (FLAG_break_on_abort) { |
| DebugBreak(); |
| } |
| abort(); |
| } |
| |
| |
| void OS::DebugBreak() { |
| #if V8_HOST_ARCH_ARM |
| asm("bkpt 0"); |
| #elif V8_HOST_ARCH_MIPS |
| asm("break"); |
| #elif V8_HOST_ARCH_IA32 |
| #if defined(__native_client__) |
| asm("hlt"); |
| #else |
| asm("int $3"); |
| #endif // __native_client__ |
| #elif V8_HOST_ARCH_X64 |
| asm("int $3"); |
| #else |
| #error Unsupported host architecture. |
| #endif |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| // Math functions |
| |
| double ceiling(double x) { |
| // Correct buggy 'ceil' on some systems (i.e. FreeBSD, OS X 10.5) |
| return (-1.0 < x && x < 0.0) ? -0.0 : ceil(x); |
| } |
| |
| |
| double modulo(double x, double y) { |
| return fmod(x, y); |
| } |
| |
| |
| #define UNARY_MATH_FUNCTION(name, generator) \ |
| static UnaryMathFunction fast_##name##_function = NULL; \ |
| void init_fast_##name##_function() { \ |
| fast_##name##_function = generator; \ |
| } \ |
| double fast_##name(double x) { \ |
| return (*fast_##name##_function)(x); \ |
| } |
| |
| UNARY_MATH_FUNCTION(sin, CreateTranscendentalFunction(TranscendentalCache::SIN)) |
| UNARY_MATH_FUNCTION(cos, CreateTranscendentalFunction(TranscendentalCache::COS)) |
| UNARY_MATH_FUNCTION(tan, CreateTranscendentalFunction(TranscendentalCache::TAN)) |
| UNARY_MATH_FUNCTION(log, CreateTranscendentalFunction(TranscendentalCache::LOG)) |
| UNARY_MATH_FUNCTION(exp, CreateExpFunction()) |
| UNARY_MATH_FUNCTION(sqrt, CreateSqrtFunction()) |
| |
| #undef UNARY_MATH_FUNCTION |
| |
| |
| void lazily_initialize_fast_exp() { |
| if (fast_exp_function == NULL) { |
| init_fast_exp_function(); |
| } |
| } |
| |
| |
| double OS::nan_value() { |
| // NAN from math.h is defined in C99 and not in POSIX. |
| return NAN; |
| } |
| |
| |
| int OS::GetCurrentProcessId() { |
| return static_cast<int>(getpid()); |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| // POSIX date/time support. |
| // |
| |
| int OS::GetUserTime(uint32_t* secs, uint32_t* usecs) { |
| struct rusage usage; |
| |
| if (getrusage(RUSAGE_SELF, &usage) < 0) return -1; |
| *secs = usage.ru_utime.tv_sec; |
| *usecs = usage.ru_utime.tv_usec; |
| return 0; |
| } |
| |
| |
| double OS::TimeCurrentMillis() { |
| struct timeval tv; |
| if (gettimeofday(&tv, NULL) < 0) return 0.0; |
| return (static_cast<double>(tv.tv_sec) * 1000) + |
| (static_cast<double>(tv.tv_usec) / 1000); |
| } |
| |
| |
| int64_t OS::Ticks() { |
| // gettimeofday has microsecond resolution. |
| struct timeval tv; |
| if (gettimeofday(&tv, NULL) < 0) |
| return 0; |
| return (static_cast<int64_t>(tv.tv_sec) * 1000000) + tv.tv_usec; |
| } |
| |
| |
| double OS::DaylightSavingsOffset(double time) { |
| if (std::isnan(time)) return nan_value(); |
| time_t tv = static_cast<time_t>(floor(time/msPerSecond)); |
| struct tm* t = localtime(&tv); |
| if (NULL == t) return nan_value(); |
| return t->tm_isdst > 0 ? 3600 * msPerSecond : 0; |
| } |
| |
| |
| int OS::GetLastError() { |
| return errno; |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| // POSIX stdio support. |
| // |
| |
| FILE* OS::FOpen(const char* path, const char* mode) { |
| FILE* file = fopen(path, mode); |
| if (file == NULL) return NULL; |
| struct stat file_stat; |
| if (fstat(fileno(file), &file_stat) != 0) return NULL; |
| bool is_regular_file = ((file_stat.st_mode & S_IFREG) != 0); |
| if (is_regular_file) return file; |
| fclose(file); |
| return NULL; |
| } |
| |
| |
| bool OS::Remove(const char* path) { |
| return (remove(path) == 0); |
| } |
| |
| |
| FILE* OS::OpenTemporaryFile() { |
| return tmpfile(); |
| } |
| |
| |
| const char* const OS::LogFileOpenMode = "w"; |
| |
| |
| void OS::Print(const char* format, ...) { |
| va_list args; |
| va_start(args, format); |
| VPrint(format, args); |
| va_end(args); |
| } |
| |
| |
| void OS::VPrint(const char* format, va_list args) { |
| #if defined(ANDROID) && !defined(V8_ANDROID_LOG_STDOUT) |
| __android_log_vprint(ANDROID_LOG_INFO, LOG_TAG, format, args); |
| #else |
| vprintf(format, args); |
| #endif |
| } |
| |
| |
| void OS::FPrint(FILE* out, const char* format, ...) { |
| va_list args; |
| va_start(args, format); |
| VFPrint(out, format, args); |
| va_end(args); |
| } |
| |
| |
| void OS::VFPrint(FILE* out, const char* format, va_list args) { |
| #if defined(ANDROID) && !defined(V8_ANDROID_LOG_STDOUT) |
| __android_log_vprint(ANDROID_LOG_INFO, LOG_TAG, format, args); |
| #else |
| vfprintf(out, format, args); |
| #endif |
| } |
| |
| |
| void OS::PrintError(const char* format, ...) { |
| va_list args; |
| va_start(args, format); |
| VPrintError(format, args); |
| va_end(args); |
| } |
| |
| |
| void OS::VPrintError(const char* format, va_list args) { |
| #if defined(ANDROID) && !defined(V8_ANDROID_LOG_STDOUT) |
| __android_log_vprint(ANDROID_LOG_ERROR, LOG_TAG, format, args); |
| #else |
| vfprintf(stderr, format, args); |
| #endif |
| } |
| |
| |
| int OS::SNPrintF(Vector<char> str, const char* format, ...) { |
| va_list args; |
| va_start(args, format); |
| int result = VSNPrintF(str, format, args); |
| va_end(args); |
| return result; |
| } |
| |
| |
| int OS::VSNPrintF(Vector<char> str, |
| const char* format, |
| va_list args) { |
| int n = vsnprintf(str.start(), str.length(), format, args); |
| if (n < 0 || n >= str.length()) { |
| // If the length is zero, the assignment fails. |
| if (str.length() > 0) |
| str[str.length() - 1] = '\0'; |
| return -1; |
| } else { |
| return n; |
| } |
| } |
| |
| |
| #if V8_TARGET_ARCH_IA32 |
| static void MemMoveWrapper(void* dest, const void* src, size_t size) { |
| memmove(dest, src, size); |
| } |
| |
| |
| // Initialize to library version so we can call this at any time during startup. |
| static OS::MemMoveFunction memmove_function = &MemMoveWrapper; |
| |
| // Defined in codegen-ia32.cc. |
| OS::MemMoveFunction CreateMemMoveFunction(); |
| |
| // Copy memory area. No restrictions. |
| void OS::MemMove(void* dest, const void* src, size_t size) { |
| if (size == 0) return; |
| // Note: here we rely on dependent reads being ordered. This is true |
| // on all architectures we currently support. |
| (*memmove_function)(dest, src, size); |
| } |
| |
| #elif defined(V8_HOST_ARCH_ARM) |
| void OS::MemCopyUint16Uint8Wrapper(uint16_t* dest, |
| const uint8_t* src, |
| size_t chars) { |
| uint16_t *limit = dest + chars; |
| while (dest < limit) { |
| *dest++ = static_cast<uint16_t>(*src++); |
| } |
| } |
| |
| |
| OS::MemCopyUint8Function OS::memcopy_uint8_function = &OS::MemCopyUint8Wrapper; |
| OS::MemCopyUint16Uint8Function OS::memcopy_uint16_uint8_function = |
| &OS::MemCopyUint16Uint8Wrapper; |
| // Defined in codegen-arm.cc. |
| OS::MemCopyUint8Function CreateMemCopyUint8Function( |
| OS::MemCopyUint8Function stub); |
| OS::MemCopyUint16Uint8Function CreateMemCopyUint16Uint8Function( |
| OS::MemCopyUint16Uint8Function stub); |
| #endif |
| |
| |
| void OS::PostSetUp() { |
| #if V8_TARGET_ARCH_IA32 |
| OS::MemMoveFunction generated_memmove = CreateMemMoveFunction(); |
| if (generated_memmove != NULL) { |
| memmove_function = generated_memmove; |
| } |
| #elif defined(V8_HOST_ARCH_ARM) |
| OS::memcopy_uint8_function = |
| CreateMemCopyUint8Function(&OS::MemCopyUint8Wrapper); |
| OS::memcopy_uint16_uint8_function = |
| CreateMemCopyUint16Uint8Function(&OS::MemCopyUint16Uint8Wrapper); |
| #endif |
| init_fast_sin_function(); |
| init_fast_cos_function(); |
| init_fast_tan_function(); |
| init_fast_log_function(); |
| // fast_exp is initialized lazily. |
| init_fast_sqrt_function(); |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| // POSIX string support. |
| // |
| |
| char* OS::StrChr(char* str, int c) { |
| return strchr(str, c); |
| } |
| |
| |
| void OS::StrNCpy(Vector<char> dest, const char* src, size_t n) { |
| strncpy(dest.start(), src, n); |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| // POSIX thread support. |
| // |
| |
| class Thread::PlatformData : public Malloced { |
| public: |
| PlatformData() : thread_(kNoThread) {} |
| pthread_t thread_; // Thread handle for pthread. |
| }; |
| |
| Thread::Thread(const Options& options) |
| : data_(new PlatformData), |
| stack_size_(options.stack_size()), |
| start_semaphore_(NULL) { |
| set_name(options.name()); |
| } |
| |
| |
| Thread::~Thread() { |
| delete data_; |
| } |
| |
| |
| static void SetThreadName(const char* name) { |
| #if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__) |
| pthread_set_name_np(pthread_self(), name); |
| #elif defined(__NetBSD__) |
| STATIC_ASSERT(Thread::kMaxThreadNameLength <= PTHREAD_MAX_NAMELEN_NP); |
| pthread_setname_np(pthread_self(), "%s", name); |
| #elif defined(__APPLE__) |
| // pthread_setname_np is only available in 10.6 or later, so test |
| // for it at runtime. |
| int (*dynamic_pthread_setname_np)(const char*); |
| *reinterpret_cast<void**>(&dynamic_pthread_setname_np) = |
| dlsym(RTLD_DEFAULT, "pthread_setname_np"); |
| if (dynamic_pthread_setname_np == NULL) |
| return; |
| |
| // Mac OS X does not expose the length limit of the name, so hardcode it. |
| static const int kMaxNameLength = 63; |
| STATIC_ASSERT(Thread::kMaxThreadNameLength <= kMaxNameLength); |
| dynamic_pthread_setname_np(name); |
| #elif defined(PR_SET_NAME) |
| prctl(PR_SET_NAME, |
| reinterpret_cast<unsigned long>(name), // NOLINT |
| 0, 0, 0); |
| #endif |
| } |
| |
| |
| static void* ThreadEntry(void* arg) { |
| Thread* thread = reinterpret_cast<Thread*>(arg); |
| // This is also initialized by the first argument to pthread_create() but we |
| // don't know which thread will run first (the original thread or the new |
| // one) so we initialize it here too. |
| thread->data()->thread_ = pthread_self(); |
| SetThreadName(thread->name()); |
| ASSERT(thread->data()->thread_ != kNoThread); |
| thread->NotifyStartedAndRun(); |
| return NULL; |
| } |
| |
| |
| void Thread::set_name(const char* name) { |
| strncpy(name_, name, sizeof(name_)); |
| name_[sizeof(name_) - 1] = '\0'; |
| } |
| |
| |
| void Thread::Start() { |
| int result; |
| pthread_attr_t attr; |
| memset(&attr, 0, sizeof(attr)); |
| result = pthread_attr_init(&attr); |
| ASSERT_EQ(0, result); |
| // Native client uses default stack size. |
| #if !defined(__native_client__) |
| if (stack_size_ > 0) { |
| result = pthread_attr_setstacksize(&attr, static_cast<size_t>(stack_size_)); |
| ASSERT_EQ(0, result); |
| } |
| #endif |
| result = pthread_create(&data_->thread_, &attr, ThreadEntry, this); |
| ASSERT_EQ(0, result); |
| result = pthread_attr_destroy(&attr); |
| ASSERT_EQ(0, result); |
| ASSERT(data_->thread_ != kNoThread); |
| USE(result); |
| } |
| |
| |
| void Thread::Join() { |
| pthread_join(data_->thread_, NULL); |
| } |
| |
| |
| void Thread::YieldCPU() { |
| int result = sched_yield(); |
| ASSERT_EQ(0, result); |
| USE(result); |
| } |
| |
| |
| static Thread::LocalStorageKey PthreadKeyToLocalKey(pthread_key_t pthread_key) { |
| #if defined(__CYGWIN__) |
| // We need to cast pthread_key_t to Thread::LocalStorageKey in two steps |
| // because pthread_key_t is a pointer type on Cygwin. This will probably not |
| // work on 64-bit platforms, but Cygwin doesn't support 64-bit anyway. |
| STATIC_ASSERT(sizeof(Thread::LocalStorageKey) == sizeof(pthread_key_t)); |
| intptr_t ptr_key = reinterpret_cast<intptr_t>(pthread_key); |
| return static_cast<Thread::LocalStorageKey>(ptr_key); |
| #else |
| return static_cast<Thread::LocalStorageKey>(pthread_key); |
| #endif |
| } |
| |
| |
| static pthread_key_t LocalKeyToPthreadKey(Thread::LocalStorageKey local_key) { |
| #if defined(__CYGWIN__) |
| STATIC_ASSERT(sizeof(Thread::LocalStorageKey) == sizeof(pthread_key_t)); |
| intptr_t ptr_key = static_cast<intptr_t>(local_key); |
| return reinterpret_cast<pthread_key_t>(ptr_key); |
| #else |
| return static_cast<pthread_key_t>(local_key); |
| #endif |
| } |
| |
| |
| #ifdef V8_FAST_TLS_SUPPORTED |
| |
| static Atomic32 tls_base_offset_initialized = 0; |
| intptr_t kMacTlsBaseOffset = 0; |
| |
| // It's safe to do the initialization more that once, but it has to be |
| // done at least once. |
| static void InitializeTlsBaseOffset() { |
| const size_t kBufferSize = 128; |
| char buffer[kBufferSize]; |
| size_t buffer_size = kBufferSize; |
| int ctl_name[] = { CTL_KERN , KERN_OSRELEASE }; |
| if (sysctl(ctl_name, 2, buffer, &buffer_size, NULL, 0) != 0) { |
| V8_Fatal(__FILE__, __LINE__, "V8 failed to get kernel version"); |
| } |
| // The buffer now contains a string of the form XX.YY.ZZ, where |
| // XX is the major kernel version component. |
| // Make sure the buffer is 0-terminated. |
| buffer[kBufferSize - 1] = '\0'; |
| char* period_pos = strchr(buffer, '.'); |
| *period_pos = '\0'; |
| int kernel_version_major = |
| static_cast<int>(strtol(buffer, NULL, 10)); // NOLINT |
| // The constants below are taken from pthreads.s from the XNU kernel |
| // sources archive at www.opensource.apple.com. |
| if (kernel_version_major < 11) { |
| // 8.x.x (Tiger), 9.x.x (Leopard), 10.x.x (Snow Leopard) have the |
| // same offsets. |
| #if V8_HOST_ARCH_IA32 |
| kMacTlsBaseOffset = 0x48; |
| #else |
| kMacTlsBaseOffset = 0x60; |
| #endif |
| } else { |
| // 11.x.x (Lion) changed the offset. |
| kMacTlsBaseOffset = 0; |
| } |
| |
| Release_Store(&tls_base_offset_initialized, 1); |
| } |
| |
| |
| static void CheckFastTls(Thread::LocalStorageKey key) { |
| void* expected = reinterpret_cast<void*>(0x1234CAFE); |
| Thread::SetThreadLocal(key, expected); |
| void* actual = Thread::GetExistingThreadLocal(key); |
| if (expected != actual) { |
| V8_Fatal(__FILE__, __LINE__, |
| "V8 failed to initialize fast TLS on current kernel"); |
| } |
| Thread::SetThreadLocal(key, NULL); |
| } |
| |
| #endif // V8_FAST_TLS_SUPPORTED |
| |
| |
| Thread::LocalStorageKey Thread::CreateThreadLocalKey() { |
| #ifdef V8_FAST_TLS_SUPPORTED |
| bool check_fast_tls = false; |
| if (tls_base_offset_initialized == 0) { |
| check_fast_tls = true; |
| InitializeTlsBaseOffset(); |
| } |
| #endif |
| pthread_key_t key; |
| int result = pthread_key_create(&key, NULL); |
| ASSERT_EQ(0, result); |
| USE(result); |
| LocalStorageKey local_key = PthreadKeyToLocalKey(key); |
| #ifdef V8_FAST_TLS_SUPPORTED |
| // If we just initialized fast TLS support, make sure it works. |
| if (check_fast_tls) CheckFastTls(local_key); |
| #endif |
| return local_key; |
| } |
| |
| |
| void Thread::DeleteThreadLocalKey(LocalStorageKey key) { |
| pthread_key_t pthread_key = LocalKeyToPthreadKey(key); |
| int result = pthread_key_delete(pthread_key); |
| ASSERT_EQ(0, result); |
| USE(result); |
| } |
| |
| |
| void* Thread::GetThreadLocal(LocalStorageKey key) { |
| pthread_key_t pthread_key = LocalKeyToPthreadKey(key); |
| return pthread_getspecific(pthread_key); |
| } |
| |
| |
| void Thread::SetThreadLocal(LocalStorageKey key, void* value) { |
| pthread_key_t pthread_key = LocalKeyToPthreadKey(key); |
| int result = pthread_setspecific(pthread_key, value); |
| ASSERT_EQ(0, result); |
| USE(result); |
| } |
| |
| |
| class POSIXMutex : public Mutex { |
| public: |
| POSIXMutex() { |
| pthread_mutexattr_t attr; |
| memset(&attr, 0, sizeof(attr)); |
| int result = pthread_mutexattr_init(&attr); |
| ASSERT(result == 0); |
| result = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); |
| ASSERT(result == 0); |
| result = pthread_mutex_init(&mutex_, &attr); |
| ASSERT(result == 0); |
| result = pthread_mutexattr_destroy(&attr); |
| ASSERT(result == 0); |
| USE(result); |
| } |
| |
| virtual ~POSIXMutex() { pthread_mutex_destroy(&mutex_); } |
| |
| virtual int Lock() { return pthread_mutex_lock(&mutex_); } |
| |
| virtual int Unlock() { return pthread_mutex_unlock(&mutex_); } |
| |
| virtual bool TryLock() { |
| int result = pthread_mutex_trylock(&mutex_); |
| // Return false if the lock is busy and locking failed. |
| if (result == EBUSY) { |
| return false; |
| } |
| ASSERT(result == 0); // Verify no other errors. |
| return true; |
| } |
| |
| private: |
| pthread_mutex_t mutex_; // Pthread mutex for POSIX platforms. |
| }; |
| |
| |
| Mutex* OS::CreateMutex() { |
| return new POSIXMutex(); |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| // POSIX socket support. |
| // |
| |
| class POSIXSocket : public Socket { |
| public: |
| explicit POSIXSocket() { |
| // Create the socket. |
| socket_ = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| if (IsValid()) { |
| // Allow rapid reuse. |
| static const int kOn = 1; |
| int ret = setsockopt(socket_, SOL_SOCKET, SO_REUSEADDR, |
| &kOn, sizeof(kOn)); |
| ASSERT(ret == 0); |
| USE(ret); |
| } |
| } |
| explicit POSIXSocket(int socket): socket_(socket) { } |
| virtual ~POSIXSocket() { Shutdown(); } |
| |
| // Server initialization. |
| bool Bind(const int port); |
| bool Listen(int backlog) const; |
| Socket* Accept() const; |
| |
| // Client initialization. |
| bool Connect(const char* host, const char* port); |
| |
| // Shutdown socket for both read and write. |
| bool Shutdown(); |
| |
| // Data Transimission |
| int Send(const char* data, int len) const; |
| int Receive(char* data, int len) const; |
| |
| bool SetReuseAddress(bool reuse_address); |
| |
| bool IsValid() const { return socket_ != -1; } |
| |
| private: |
| int socket_; |
| }; |
| |
| |
| bool POSIXSocket::Bind(const int port) { |
| if (!IsValid()) { |
| return false; |
| } |
| |
| sockaddr_in addr; |
| memset(&addr, 0, sizeof(addr)); |
| addr.sin_family = AF_INET; |
| addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| addr.sin_port = htons(port); |
| int status = bind(socket_, |
| BitCast<struct sockaddr *>(&addr), |
| sizeof(addr)); |
| return status == 0; |
| } |
| |
| |
| bool POSIXSocket::Listen(int backlog) const { |
| if (!IsValid()) { |
| return false; |
| } |
| |
| int status = listen(socket_, backlog); |
| return status == 0; |
| } |
| |
| |
| Socket* POSIXSocket::Accept() const { |
| if (!IsValid()) { |
| return NULL; |
| } |
| |
| int socket; |
| do { |
| socket = accept(socket_, NULL, NULL); |
| } while (socket == -1 && errno == EINTR); |
| |
| if (socket == -1) { |
| return NULL; |
| } else { |
| return new POSIXSocket(socket); |
| } |
| } |
| |
| |
| bool POSIXSocket::Connect(const char* host, const char* port) { |
| if (!IsValid()) { |
| return false; |
| } |
| |
| // Lookup host and port. |
| struct addrinfo *result = NULL; |
| struct addrinfo hints; |
| memset(&hints, 0, sizeof(addrinfo)); |
| hints.ai_family = AF_INET; |
| hints.ai_socktype = SOCK_STREAM; |
| hints.ai_protocol = IPPROTO_TCP; |
| int status = getaddrinfo(host, port, &hints, &result); |
| if (status != 0) { |
| return false; |
| } |
| |
| // Connect. |
| do { |
| status = connect(socket_, result->ai_addr, result->ai_addrlen); |
| } while (status == -1 && errno == EINTR); |
| freeaddrinfo(result); |
| return status == 0; |
| } |
| |
| |
| bool POSIXSocket::Shutdown() { |
| if (IsValid()) { |
| // Shutdown socket for both read and write. |
| int status = shutdown(socket_, SHUT_RDWR); |
| close(socket_); |
| socket_ = -1; |
| return status == 0; |
| } |
| return true; |
| } |
| |
| |
| int POSIXSocket::Send(const char* data, int len) const { |
| if (len <= 0) return 0; |
| int written = 0; |
| while (written < len) { |
| int status = send(socket_, data + written, len - written, 0); |
| if (status == 0) { |
| break; |
| } else if (status > 0) { |
| written += status; |
| } else if (errno != EINTR) { |
| return 0; |
| } |
| } |
| return written; |
| } |
| |
| |
| int POSIXSocket::Receive(char* data, int len) const { |
| if (len <= 0) return 0; |
| int status; |
| do { |
| status = recv(socket_, data, len, 0); |
| } while (status == -1 && errno == EINTR); |
| return (status < 0) ? 0 : status; |
| } |
| |
| |
| bool POSIXSocket::SetReuseAddress(bool reuse_address) { |
| int on = reuse_address ? 1 : 0; |
| int status = setsockopt(socket_, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| return status == 0; |
| } |
| |
| |
| bool Socket::SetUp() { |
| // Nothing to do on POSIX. |
| return true; |
| } |
| |
| |
| int Socket::LastError() { |
| return errno; |
| } |
| |
| |
| uint16_t Socket::HToN(uint16_t value) { |
| return htons(value); |
| } |
| |
| |
| uint16_t Socket::NToH(uint16_t value) { |
| return ntohs(value); |
| } |
| |
| |
| uint32_t Socket::HToN(uint32_t value) { |
| return htonl(value); |
| } |
| |
| |
| uint32_t Socket::NToH(uint32_t value) { |
| return ntohl(value); |
| } |
| |
| |
| Socket* OS::CreateSocket() { |
| return new POSIXSocket(); |
| } |
| |
| |
| } } // namespace v8::internal |