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Diffstat (limited to 'src/3rdparty/v8/src/platform-macos.cc')
| -rw-r--r-- | src/3rdparty/v8/src/platform-macos.cc | 942 |
1 files changed, 0 insertions, 942 deletions
diff --git a/src/3rdparty/v8/src/platform-macos.cc b/src/3rdparty/v8/src/platform-macos.cc deleted file mode 100644 index 7913981..0000000 --- a/src/3rdparty/v8/src/platform-macos.cc +++ /dev/null @@ -1,942 +0,0 @@ -// 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 MacOS goes here. For the POSIX comaptible parts -// the implementation is in platform-posix.cc. - -#include <dlfcn.h> -#include <unistd.h> -#include <sys/mman.h> -#include <mach/mach_init.h> -#include <mach-o/dyld.h> -#include <mach-o/getsect.h> - -#include <AvailabilityMacros.h> - -#include <pthread.h> -#include <semaphore.h> -#include <signal.h> -#include <libkern/OSAtomic.h> -#include <mach/mach.h> -#include <mach/semaphore.h> -#include <mach/task.h> -#include <mach/vm_statistics.h> -#include <sys/time.h> -#include <sys/resource.h> -#include <sys/types.h> -#include <sys/sysctl.h> -#include <stdarg.h> -#include <stdlib.h> -#include <string.h> -#include <errno.h> - -#undef MAP_TYPE - -#include "v8.h" - -#include "platform-posix.h" -#include "platform.h" -#include "vm-state-inl.h" - -// Manually define these here as weak imports, rather than including execinfo.h. -// This lets us launch on 10.4 which does not have these calls. -extern "C" { - extern int backtrace(void**, int) __attribute__((weak_import)); - extern char** backtrace_symbols(void* const*, int) - __attribute__((weak_import)); - extern void backtrace_symbols_fd(void* const*, int, int) - __attribute__((weak_import)); -} - - -namespace v8 { -namespace internal { - -// 0 is never a valid thread id on MacOSX since a pthread_t is -// a pointer. -static const pthread_t kNoThread = (pthread_t) 0; - - -double ceiling(double x) { - // Correct Mac OS X Leopard 'ceil' behavior. - if (-1.0 < x && x < 0.0) { - return -0.0; - } else { - return ceil(x); - } -} - - -static Mutex* limit_mutex = NULL; - - -void OS::PostSetUp() { - POSIXPostSetUp(); -} - - -// We keep the lowest and highest addresses mapped as a quick way of -// determining that pointers are outside the heap (used mostly in assertions -// and verification). The estimate is conservative, i.e., not all addresses in -// 'allocated' space are actually allocated to our heap. The range is -// [lowest, highest), inclusive on the low and and exclusive on the high end. -static void* lowest_ever_allocated = reinterpret_cast<void*>(-1); -static void* highest_ever_allocated = reinterpret_cast<void*>(0); - - -static void UpdateAllocatedSpaceLimits(void* address, int size) { - ASSERT(limit_mutex != NULL); - ScopedLock lock(limit_mutex); - - lowest_ever_allocated = Min(lowest_ever_allocated, address); - highest_ever_allocated = - Max(highest_ever_allocated, - reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); -} - - -bool OS::IsOutsideAllocatedSpace(void* address) { - return address < lowest_ever_allocated || address >= highest_ever_allocated; -} - - -size_t OS::AllocateAlignment() { - return getpagesize(); -} - - -// Constants used for mmap. -// kMmapFd is used to pass vm_alloc flags to tag the region with the user -// defined tag 255 This helps identify V8-allocated regions in memory analysis -// tools like vmmap(1). -static const int kMmapFd = VM_MAKE_TAG(255); -static const off_t kMmapFdOffset = 0; - - -void* OS::Allocate(const size_t requested, - size_t* allocated, - bool is_executable) { - const size_t msize = RoundUp(requested, getpagesize()); - int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); - void* mbase = mmap(OS::GetRandomMmapAddr(), - msize, - prot, - MAP_PRIVATE | MAP_ANON, - kMmapFd, - kMmapFdOffset); - if (mbase == MAP_FAILED) { - LOG(Isolate::Current(), StringEvent("OS::Allocate", "mmap failed")); - return NULL; - } - *allocated = msize; - UpdateAllocatedSpaceLimits(mbase, msize); - return mbase; -} - - -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); -} - - -void OS::Sleep(int milliseconds) { - usleep(1000 * milliseconds); -} - - -int OS::NumberOfCores() { - return sysconf(_SC_NPROCESSORS_ONLN); -} - - -void OS::Abort() { - // Redirect to std abort to signal abnormal program termination - abort(); -} - - -void OS::DebugBreak() { - asm("int $3"); -} - - -void OS::DumpBacktrace() { - // Currently unsupported. -} - - -class PosixMemoryMappedFile : public OS::MemoryMappedFile { - public: - PosixMemoryMappedFile(FILE* file, void* memory, int size) - : file_(file), memory_(memory), size_(size) { } - virtual ~PosixMemoryMappedFile(); - virtual void* memory() { return memory_; } - virtual int size() { return size_; } - private: - FILE* file_; - void* memory_; - int size_; -}; - - -OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name) { - FILE* file = fopen(name, "r+"); - if (file == NULL) return NULL; - - fseek(file, 0, SEEK_END); - int size = ftell(file); - - void* memory = - mmap(OS::GetRandomMmapAddr(), - size, - PROT_READ | PROT_WRITE, - MAP_SHARED, - fileno(file), - 0); - return new PosixMemoryMappedFile(file, memory, size); -} - - -OS::MemoryMappedFile* OS::MemoryMappedFile::create(const char* name, int size, - void* initial) { - FILE* file = fopen(name, "w+"); - if (file == NULL) return NULL; - int result = fwrite(initial, size, 1, file); - if (result < 1) { - fclose(file); - return NULL; - } - void* memory = - mmap(OS::GetRandomMmapAddr(), - size, - PROT_READ | PROT_WRITE, - MAP_SHARED, - fileno(file), - 0); - return new PosixMemoryMappedFile(file, memory, size); -} - - -PosixMemoryMappedFile::~PosixMemoryMappedFile() { - if (memory_) OS::Free(memory_, size_); - fclose(file_); -} - - -void OS::LogSharedLibraryAddresses() { - unsigned int images_count = _dyld_image_count(); - for (unsigned int i = 0; i < images_count; ++i) { - const mach_header* header = _dyld_get_image_header(i); - if (header == NULL) continue; -#if V8_HOST_ARCH_X64 - uint64_t size; - char* code_ptr = getsectdatafromheader_64( - reinterpret_cast<const mach_header_64*>(header), - SEG_TEXT, - SECT_TEXT, - &size); -#else - unsigned int size; - char* code_ptr = getsectdatafromheader(header, SEG_TEXT, SECT_TEXT, &size); -#endif - if (code_ptr == NULL) continue; - const uintptr_t slide = _dyld_get_image_vmaddr_slide(i); - const uintptr_t start = reinterpret_cast<uintptr_t>(code_ptr) + slide; - LOG(Isolate::Current(), - SharedLibraryEvent(_dyld_get_image_name(i), start, start + size)); - } -} - - -void OS::SignalCodeMovingGC() { -} - - -uint64_t OS::CpuFeaturesImpliedByPlatform() { - // MacOSX 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); -} - - -int OS::ActivationFrameAlignment() { - // OS X activation frames must be 16 byte-aligned; see "Mac OS X ABI - // Function Call Guide". - return 16; -} - - -void OS::ReleaseStore(volatile AtomicWord* ptr, AtomicWord value) { - OSMemoryBarrier(); - *ptr = value; -} - - -const char* OS::LocalTimezone(double time) { - if (isnan(time)) return ""; - time_t tv = static_cast<time_t>(floor(time/msPerSecond)); - struct tm* t = localtime(&tv); - if (NULL == t) return ""; - return t->tm_zone; -} - - -double OS::LocalTimeOffset() { - time_t tv = time(NULL); - struct tm* t = localtime(&tv); - // tm_gmtoff includes any daylight savings offset, so subtract it. - return static_cast<double>(t->tm_gmtoff * msPerSecond - - (t->tm_isdst > 0 ? 3600 * msPerSecond : 0)); -} - - -int OS::StackWalk(Vector<StackFrame> frames) { - // If weak link to execinfo lib has failed, ie because we are on 10.4, abort. - if (backtrace == NULL) - return 0; - - int frames_size = frames.length(); - ScopedVector<void*> addresses(frames_size); - - int frames_count = backtrace(addresses.start(), frames_size); - - char** symbols = backtrace_symbols(addresses.start(), frames_count); - if (symbols == NULL) { - return kStackWalkError; - } - - for (int i = 0; i < frames_count; i++) { - frames[i].address = addresses[i]; - // Format a text representation of the frame based on the information - // available. - SNPrintF(MutableCStrVector(frames[i].text, - kStackWalkMaxTextLen), - "%s", - symbols[i]); - // Make sure line termination is in place. - frames[i].text[kStackWalkMaxTextLen - 1] = '\0'; - } - - free(symbols); - - return frames_count; -} - - -VirtualMemory::VirtualMemory() : address_(NULL), size_(0) { } - - -VirtualMemory::VirtualMemory(size_t size) - : address_(ReserveRegion(size)), size_(size) { } - - -VirtualMemory::VirtualMemory(size_t size, size_t alignment) - : address_(NULL), size_(0) { - ASSERT(IsAligned(alignment, static_cast<intptr_t>(OS::AllocateAlignment()))); - size_t request_size = RoundUp(size + alignment, - static_cast<intptr_t>(OS::AllocateAlignment())); - void* reservation = mmap(OS::GetRandomMmapAddr(), - request_size, - PROT_NONE, - MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, - kMmapFd, - kMmapFdOffset); - if (reservation == MAP_FAILED) return; - - Address base = static_cast<Address>(reservation); - Address aligned_base = RoundUp(base, alignment); - ASSERT_LE(base, aligned_base); - - // Unmap extra memory reserved before and after the desired block. - if (aligned_base != base) { - size_t prefix_size = static_cast<size_t>(aligned_base - base); - OS::Free(base, prefix_size); - request_size -= prefix_size; - } - - size_t aligned_size = RoundUp(size, OS::AllocateAlignment()); - ASSERT_LE(aligned_size, request_size); - - if (aligned_size != request_size) { - size_t suffix_size = request_size - aligned_size; - OS::Free(aligned_base + aligned_size, suffix_size); - request_size -= suffix_size; - } - - ASSERT(aligned_size == request_size); - - address_ = static_cast<void*>(aligned_base); - size_ = aligned_size; -} - - -VirtualMemory::~VirtualMemory() { - if (IsReserved()) { - bool result = ReleaseRegion(address(), size()); - ASSERT(result); - USE(result); - } -} - - -void VirtualMemory::Reset() { - address_ = NULL; - size_ = 0; -} - - -void* VirtualMemory::ReserveRegion(size_t size) { - void* result = mmap(OS::GetRandomMmapAddr(), - size, - PROT_NONE, - MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, - kMmapFd, - kMmapFdOffset); - - if (result == MAP_FAILED) return NULL; - - return result; -} - - -bool VirtualMemory::IsReserved() { - return address_ != NULL; -} - - -bool VirtualMemory::Commit(void* address, size_t size, bool is_executable) { - return CommitRegion(address, size, is_executable); -} - - -bool VirtualMemory::Guard(void* address) { - OS::Guard(address, OS::CommitPageSize()); - return true; -} - - -bool VirtualMemory::CommitRegion(void* address, - size_t size, - bool is_executable) { - int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); - if (MAP_FAILED == mmap(address, - size, - prot, - MAP_PRIVATE | MAP_ANON | MAP_FIXED, - kMmapFd, - kMmapFdOffset)) { - return false; - } - - UpdateAllocatedSpaceLimits(address, size); - return true; -} - - -bool VirtualMemory::Uncommit(void* address, size_t size) { - return UncommitRegion(address, size); -} - - -bool VirtualMemory::UncommitRegion(void* address, size_t size) { - return mmap(address, - size, - PROT_NONE, - MAP_PRIVATE | MAP_ANON | MAP_NORESERVE | MAP_FIXED, - kMmapFd, - kMmapFdOffset) != MAP_FAILED; -} - - -bool VirtualMemory::ReleaseRegion(void* address, size_t size) { - return munmap(address, size) == 0; -} - - -bool VirtualMemory::HasLazyCommits() { - return false; -} - - -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()) { - set_name(options.name()); -} - - -Thread::~Thread() { - delete data_; -} - - -static void SetThreadName(const char* name) { - // 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) - return; - - // Mac OS X does not expose the length limit of the name, so hardcode it. - static const int kMaxNameLength = 63; - USE(kMaxNameLength); - ASSERT(Thread::kMaxThreadNameLength <= kMaxNameLength); - dynamic_pthread_setname_np(name); -} - - -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->Run(); - return NULL; -} - - -void Thread::set_name(const char* name) { - strncpy(name_, name, sizeof(name_)); - name_[sizeof(name_) - 1] = '\0'; -} - - -void Thread::Start() { - pthread_attr_t* attr_ptr = NULL; - pthread_attr_t attr; - if (stack_size_ > 0) { - pthread_attr_init(&attr); - pthread_attr_setstacksize(&attr, static_cast<size_t>(stack_size_)); - attr_ptr = &attr; - } - pthread_create(&data_->thread_, attr_ptr, ThreadEntry, this); - ASSERT(data_->thread_ != kNoThread); -} - - -void Thread::Join() { - pthread_join(data_->thread_, NULL); -} - - -#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 defined(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); - USE(result); - ASSERT(result == 0); - LocalStorageKey typed_key = static_cast<LocalStorageKey>(key); -#ifdef V8_FAST_TLS_SUPPORTED - // If we just initialized fast TLS support, make sure it works. - if (check_fast_tls) CheckFastTls(typed_key); -#endif - return typed_key; -} - - -void Thread::DeleteThreadLocalKey(LocalStorageKey key) { - pthread_key_t pthread_key = static_cast<pthread_key_t>(key); - int result = pthread_key_delete(pthread_key); - USE(result); - ASSERT(result == 0); -} - - -void* Thread::GetThreadLocal(LocalStorageKey key) { - pthread_key_t pthread_key = static_cast<pthread_key_t>(key); - return pthread_getspecific(pthread_key); -} - - -void Thread::SetThreadLocal(LocalStorageKey key, void* value) { - pthread_key_t pthread_key = static_cast<pthread_key_t>(key); - pthread_setspecific(pthread_key, value); -} - - -void Thread::YieldCPU() { - sched_yield(); -} - - -class MacOSMutex : public Mutex { - public: - MacOSMutex() { - pthread_mutexattr_t attr; - pthread_mutexattr_init(&attr); - pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); - pthread_mutex_init(&mutex_, &attr); - } - - virtual ~MacOSMutex() { 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_; -}; - - -Mutex* OS::CreateMutex() { - return new MacOSMutex(); -} - - -class MacOSSemaphore : public Semaphore { - public: - explicit MacOSSemaphore(int count) { - int r; - r = semaphore_create(mach_task_self(), - &semaphore_, - SYNC_POLICY_FIFO, - count); - ASSERT(r == KERN_SUCCESS); - } - - ~MacOSSemaphore() { - int r; - r = semaphore_destroy(mach_task_self(), semaphore_); - ASSERT(r == KERN_SUCCESS); - } - - void Wait() { - int r; - do { - r = semaphore_wait(semaphore_); - ASSERT(r == KERN_SUCCESS || r == KERN_ABORTED); - } while (r == KERN_ABORTED); - } - - bool Wait(int timeout); - - void Signal() { semaphore_signal(semaphore_); } - - private: - semaphore_t semaphore_; -}; - - -bool MacOSSemaphore::Wait(int timeout) { - mach_timespec_t ts; - ts.tv_sec = timeout / 1000000; - ts.tv_nsec = (timeout % 1000000) * 1000; - return semaphore_timedwait(semaphore_, ts) != KERN_OPERATION_TIMED_OUT; -} - - -Semaphore* OS::CreateSemaphore(int count) { - return new MacOSSemaphore(count); -} - - -class Sampler::PlatformData : public Malloced { - public: - PlatformData() : profiled_thread_(mach_thread_self()) {} - - ~PlatformData() { - // Deallocate Mach port for thread. - mach_port_deallocate(mach_task_self(), profiled_thread_); - } - - thread_act_t profiled_thread() { return profiled_thread_; } - - private: - // Note: for profiled_thread_ Mach primitives are used instead of PThread's - // because the latter doesn't provide thread manipulation primitives required. - // For details, consult "Mac OS X Internals" book, Section 7.3. - thread_act_t profiled_thread_; -}; - - -class SamplerThread : public Thread { - public: - static const int kSamplerThreadStackSize = 64 * KB; - - explicit SamplerThread(int interval) - : Thread(Thread::Options("SamplerThread", kSamplerThreadStackSize)), - interval_(interval) {} - - static void SetUp() { if (!mutex_) mutex_ = OS::CreateMutex(); } - static void TearDown() { delete mutex_; } - - static void AddActiveSampler(Sampler* sampler) { - ScopedLock lock(mutex_); - SamplerRegistry::AddActiveSampler(sampler); - if (instance_ == NULL) { - instance_ = new SamplerThread(sampler->interval()); - instance_->Start(); - } else { - ASSERT(instance_->interval_ == sampler->interval()); - } - } - - static void RemoveActiveSampler(Sampler* sampler) { - ScopedLock lock(mutex_); - SamplerRegistry::RemoveActiveSampler(sampler); - if (SamplerRegistry::GetState() == SamplerRegistry::HAS_NO_SAMPLERS) { - RuntimeProfiler::StopRuntimeProfilerThreadBeforeShutdown(instance_); - delete instance_; - instance_ = NULL; - } - } - - // Implement Thread::Run(). - virtual void Run() { - SamplerRegistry::State state; - while ((state = SamplerRegistry::GetState()) != - SamplerRegistry::HAS_NO_SAMPLERS) { - // When CPU profiling is enabled both JavaScript and C++ code is - // profiled. We must not suspend. - if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) { - SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this); - } else { - if (RuntimeProfiler::WaitForSomeIsolateToEnterJS()) continue; - } - OS::Sleep(interval_); - } - } - - static void DoCpuProfile(Sampler* sampler, void* raw_sampler_thread) { - if (!sampler->isolate()->IsInitialized()) return; - if (!sampler->IsProfiling()) return; - SamplerThread* sampler_thread = - reinterpret_cast<SamplerThread*>(raw_sampler_thread); - sampler_thread->SampleContext(sampler); - } - - void SampleContext(Sampler* sampler) { - thread_act_t profiled_thread = sampler->platform_data()->profiled_thread(); - TickSample sample_obj; - TickSample* sample = CpuProfiler::TickSampleEvent(sampler->isolate()); - if (sample == NULL) sample = &sample_obj; - - if (KERN_SUCCESS != thread_suspend(profiled_thread)) return; - -#if V8_HOST_ARCH_X64 - thread_state_flavor_t flavor = x86_THREAD_STATE64; - x86_thread_state64_t state; - mach_msg_type_number_t count = x86_THREAD_STATE64_COUNT; -#if __DARWIN_UNIX03 -#define REGISTER_FIELD(name) __r ## name -#else -#define REGISTER_FIELD(name) r ## name -#endif // __DARWIN_UNIX03 -#elif V8_HOST_ARCH_IA32 - thread_state_flavor_t flavor = i386_THREAD_STATE; - i386_thread_state_t state; - mach_msg_type_number_t count = i386_THREAD_STATE_COUNT; -#if __DARWIN_UNIX03 -#define REGISTER_FIELD(name) __e ## name -#else -#define REGISTER_FIELD(name) e ## name -#endif // __DARWIN_UNIX03 -#else -#error Unsupported Mac OS X host architecture. -#endif // V8_HOST_ARCH - - if (thread_get_state(profiled_thread, - flavor, - reinterpret_cast<natural_t*>(&state), - &count) == KERN_SUCCESS) { - sample->state = sampler->isolate()->current_vm_state(); - sample->pc = reinterpret_cast<Address>(state.REGISTER_FIELD(ip)); - sample->sp = reinterpret_cast<Address>(state.REGISTER_FIELD(sp)); - sample->fp = reinterpret_cast<Address>(state.REGISTER_FIELD(bp)); - sampler->SampleStack(sample); - sampler->Tick(sample); - } - thread_resume(profiled_thread); - } - - const int interval_; - - // Protects the process wide state below. - static Mutex* mutex_; - static SamplerThread* instance_; - - private: - DISALLOW_COPY_AND_ASSIGN(SamplerThread); -}; - -#undef REGISTER_FIELD - - -Mutex* SamplerThread::mutex_ = NULL; -SamplerThread* SamplerThread::instance_ = NULL; - - -void OS::SetUp() { - // Seed the random number generator. We preserve microsecond resolution. - uint64_t seed = Ticks() ^ (getpid() << 16); - srandom(static_cast<unsigned int>(seed)); - limit_mutex = CreateMutex(); - SamplerThread::SetUp(); -} - - -void OS::TearDown() { - SamplerThread::TearDown(); - delete limit_mutex; -} - - -Sampler::Sampler(Isolate* isolate, int interval) - : isolate_(isolate), - interval_(interval), - profiling_(false), - active_(false), - samples_taken_(0) { - data_ = new PlatformData; -} - - -Sampler::~Sampler() { - ASSERT(!IsActive()); - delete data_; -} - - -void Sampler::Start() { - ASSERT(!IsActive()); - SetActive(true); - SamplerThread::AddActiveSampler(this); -} - - -void Sampler::Stop() { - ASSERT(IsActive()); - SamplerThread::RemoveActiveSampler(this); - SetActive(false); -} - - -bool Sampler::CanSampleOnProfilerEventsProcessorThread() { - return false; -} - - -void Sampler::DoSample() { -} - - -void Sampler::StartProfiling() { -} - - -void Sampler::StopProfiling() { -} - - -} } // namespace v8::internal |