Permalink
Browse files

V8 cygwin support

  • Loading branch information...
1 parent 67e352e commit fd013d17a21bbf7675d3bef59b2a76a58cb311f5 @piscisaureus piscisaureus committed with ry Feb 10, 2011
Showing with 790 additions and 1 deletion.
  1. +4 −1 deps/v8/SConstruct
  2. +1 −0 deps/v8/src/SConscript
  3. +779 −0 deps/v8/src/platform-cygwin.cc
  4. +4 −0 deps/v8/src/platform.h
  5. +2 −0 deps/v8/tools/utils.py
View
5 deps/v8/SConstruct
@@ -188,6 +188,9 @@ LIBRARY_FLAGS = {
'LIBPATH' : ['/usr/local/lib'],
'CCFLAGS': ['-ansi'],
},
+ 'os:cygwin': {
+ 'WARNINGFLAGS': ['-Werror'],
+ },
'os:win32': {
'CCFLAGS': ['-DWIN32'],
'CXXFLAGS': ['-DWIN32'],
@@ -691,7 +694,7 @@ SIMPLE_OPTIONS = {
'help': 'the toolchain to use (%s)' % TOOLCHAIN_GUESS
},
'os': {
- 'values': ['freebsd', 'linux', 'macos', 'win32', 'android', 'openbsd', 'solaris'],
+ 'values': ['freebsd', 'linux', 'macos', 'win32', 'android', 'openbsd', 'solaris', 'cygwin'],
'default': OS_GUESS,
'help': 'the os to build for (%s)' % OS_GUESS
},
View
1 deps/v8/src/SConscript
@@ -234,6 +234,7 @@ SOURCES = {
'os:android': ['platform-linux.cc', 'platform-posix.cc'],
'os:macos': ['platform-macos.cc', 'platform-posix.cc'],
'os:solaris': ['platform-solaris.cc', 'platform-posix.cc'],
+ 'os:cygwin': ['platform-cygwin.cc', 'platform-posix.cc'],
'os:nullos': ['platform-nullos.cc'],
'os:win32': ['platform-win32.cc'],
'mode:release': [],
View
779 deps/v8/src/platform-cygwin.cc
@@ -0,0 +1,779 @@
+// Copyright 2006-2008 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 Cygwin goes here. For the POSIX comaptible parts
+// the implementation is in platform-posix.cc.
+
+#include <pthread.h>
+#include <semaphore.h>
+#include <signal.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/types.h>
+#include <stdlib.h>
+
+// Ubuntu Dapper requires memory pages to be marked as
+// executable. Otherwise, OS raises an exception when executing code
+// in that page.
+#include <sys/types.h> // mmap & munmap
+#include <sys/mman.h> // mmap & munmap
+#include <sys/stat.h> // open
+#include <fcntl.h> // open
+#include <unistd.h> // sysconf
+#ifdef __GLIBC__
+#include <execinfo.h> // backtrace, backtrace_symbols
+#endif // def __GLIBC__
+#include <strings.h> // index
+#include <errno.h>
+#include <stdarg.h>
+
+#undef MAP_TYPE
+
+#include "v8.h"
+
+#include "platform.h"
+#include "top.h"
+#include "v8threads.h"
+#include "vm-state-inl.h"
+
+
+namespace v8 {
+namespace internal {
+
+// 0 is never a valid thread id on Linux since tids and pids share a
+// name space and pid 0 is reserved (see man 2 kill).
+static const pthread_t kNoThread = (pthread_t) 0;
+
+
+double ceiling(double x) {
+ return ceil(x);
+}
+
+
+void OS::Setup() {
+ // Seed the random number generator.
+ // Convert the current time to a 64-bit integer first, before converting it
+ // to an unsigned. Going directly can cause an overflow and the seed to be
+ // set to all ones. The seed will be identical for different instances that
+ // call this setup code within the same millisecond.
+ uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis());
+ srandom(static_cast<unsigned int>(seed));
+}
+
+
+uint64_t OS::CpuFeaturesImpliedByPlatform() {
+#if (defined(__VFP_FP__) && !defined(__SOFTFP__))
+ // Here gcc is telling us that we are on an ARM and gcc is assuming that we
+ // have VFP3 instructions. If gcc can assume it then so can we.
+ return 1u << VFP3;
+#elif CAN_USE_ARMV7_INSTRUCTIONS
+ return 1u << ARMv7;
+#else
+ return 0; // Linux runs on anything.
+#endif
+}
+
+
+#ifdef __arm__
+static bool CPUInfoContainsString(const char * search_string) {
+ const char* file_name = "/proc/cpuinfo";
+ // This is written as a straight shot one pass parser
+ // and not using STL string and ifstream because,
+ // on Linux, it's reading from a (non-mmap-able)
+ // character special device.
+ FILE* f = NULL;
+ const char* what = search_string;
+
+ if (NULL == (f = fopen(file_name, "r")))
+ return false;
+
+ int k;
+ while (EOF != (k = fgetc(f))) {
+ if (k == *what) {
+ ++what;
+ while ((*what != '\0') && (*what == fgetc(f))) {
+ ++what;
+ }
+ if (*what == '\0') {
+ fclose(f);
+ return true;
+ } else {
+ what = search_string;
+ }
+ }
+ }
+ fclose(f);
+
+ // Did not find string in the proc file.
+ return false;
+}
+
+bool OS::ArmCpuHasFeature(CpuFeature feature) {
+ const char* search_string = NULL;
+ // Simple detection of VFP at runtime for Linux.
+ // It is based on /proc/cpuinfo, which reveals hardware configuration
+ // to user-space applications. According to ARM (mid 2009), no similar
+ // facility is universally available on the ARM architectures,
+ // so it's up to individual OSes to provide such.
+ switch (feature) {
+ case VFP3:
+ search_string = "vfpv3";
+ break;
+ case ARMv7:
+ search_string = "ARMv7";
+ break;
+ default:
+ UNREACHABLE();
+ }
+
+ if (CPUInfoContainsString(search_string)) {
+ return true;
+ }
+
+ if (feature == VFP3) {
+ // Some old kernels will report vfp not vfpv3. Here we make a last attempt
+ // to detect vfpv3 by checking for vfp *and* neon, since neon is only
+ // available on architectures with vfpv3.
+ // Checking neon on its own is not enough as it is possible to have neon
+ // without vfp.
+ if (CPUInfoContainsString("vfp") && CPUInfoContainsString("neon")) {
+ return true;
+ }
+ }
+
+ return false;
+}
+#endif // def __arm__
+
+
+int OS::ActivationFrameAlignment() {
+#ifdef 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;
+#endif
+ // With gcc 4.4 the tree vectorization optimizer can generate code
+ // that requires 16 byte alignment such as movdqa on x86.
+ return 16;
+}
+
+
+void OS::ReleaseStore(volatile AtomicWord* ptr, AtomicWord value) {
+ __asm__ __volatile__("" : : : "memory");
+ // An x86 store acts as a release barrier.
+ *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 tzname[0]; // The location of the timezone string on Cywin.
+}
+
+
+double OS::LocalTimeOffset() {
+ // On Cygwin, struct tm does not contain a tm_gmtoff field.
+ time_t utc = time(NULL);
+ ASSERT(utc != -1);
+ struct tm* loc = localtime(&utc);
+ ASSERT(loc != NULL);
+ return static_cast<double>((mktime(loc) - utc) * msPerSecond);
+}
+
+
+// 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, ie, 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) {
+ 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 sysconf(_SC_PAGESIZE);
+}
+
+
+void* OS::Allocate(const size_t requested,
+ size_t* allocated,
+ bool is_executable) {
+ const size_t msize = RoundUp(requested, sysconf(_SC_PAGESIZE));
+ int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
+ void* mbase = mmap(NULL, msize, prot, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ if (mbase == MAP_FAILED) {
+ LOG(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);
+}
+
+
+#ifdef ENABLE_HEAP_PROTECTION
+
+void OS::Protect(void* address, size_t size) {
+ // TODO(1240712): mprotect has a return value which is ignored here.
+ mprotect(address, size, PROT_READ);
+}
+
+
+void OS::Unprotect(void* address, size_t size, bool is_executable) {
+ // TODO(1240712): mprotect has a return value which is ignored here.
+ int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
+ mprotect(address, size, prot);
+}
+
+#endif
+
+
+void OS::Sleep(int milliseconds) {
+ unsigned int ms = static_cast<unsigned int>(milliseconds);
+ usleep(1000 * ms);
+}
+
+
+void OS::Abort() {
+ // Redirect to std abort to signal abnormal program termination.
+ abort();
+}
+
+
+void OS::DebugBreak() {
+// TODO(lrn): Introduce processor define for runtime system (!= V8_ARCH_x,
+// which is the architecture of generated code).
+#if (defined(__arm__) || defined(__thumb__)) && \
+ defined(CAN_USE_ARMV5_INSTRUCTIONS)
+ asm("bkpt 0");
+#elif defined(__mips__)
+ asm("break");
+#else
+ asm("int $3");
+#endif
+}
+
+
+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, "w+");
+ if (file == NULL) return NULL;
+
+ fseek(file, 0, SEEK_END);
+ int size = ftell(file);
+
+ void* memory =
+ mmap(0, 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(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fileno(file), 0);
+ return new PosixMemoryMappedFile(file, memory, size);
+}
+
+
+PosixMemoryMappedFile::~PosixMemoryMappedFile() {
+ if (memory_) munmap(memory_, size_);
+ fclose(file_);
+}
+
+
+void OS::LogSharedLibraryAddresses() {
+#ifdef ENABLE_LOGGING_AND_PROFILING
+ // This function assumes that the layout of the file is as follows:
+ // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name]
+ // If we encounter an unexpected situation we abort scanning further entries.
+ FILE* fp = fopen("/proc/self/maps", "r");
+ if (fp == NULL) return;
+
+ // Allocate enough room to be able to store a full file name.
+ const int kLibNameLen = FILENAME_MAX + 1;
+ char* lib_name = reinterpret_cast<char*>(malloc(kLibNameLen));
+
+ // This loop will terminate once the scanning hits an EOF.
+ while (true) {
+ uintptr_t start, end;
+ char attr_r, attr_w, attr_x, attr_p;
+ // Parse the addresses and permission bits at the beginning of the line.
+ if (fscanf(fp, "%" V8PRIxPTR "-%" V8PRIxPTR, &start, &end) != 2) break;
+ if (fscanf(fp, " %c%c%c%c", &attr_r, &attr_w, &attr_x, &attr_p) != 4) break;
+
+ int c;
+ if (attr_r == 'r' && attr_w != 'w' && attr_x == 'x') {
+ // Found a read-only executable entry. Skip characters until we reach
+ // the beginning of the filename or the end of the line.
+ do {
+ c = getc(fp);
+ } while ((c != EOF) && (c != '\n') && (c != '/'));
+ if (c == EOF) break; // EOF: Was unexpected, just exit.
+
+ // Process the filename if found.
+ if (c == '/') {
+ ungetc(c, fp); // Push the '/' back into the stream to be read below.
+
+ // Read to the end of the line. Exit if the read fails.
+ if (fgets(lib_name, kLibNameLen, fp) == NULL) break;
+
+ // Drop the newline character read by fgets. We do not need to check
+ // for a zero-length string because we know that we at least read the
+ // '/' character.
+ lib_name[strlen(lib_name) - 1] = '\0';
+ } else {
+ // No library name found, just record the raw address range.
+ snprintf(lib_name, kLibNameLen,
+ "%08" V8PRIxPTR "-%08" V8PRIxPTR, start, end);
+ }
+ LOG(SharedLibraryEvent(lib_name, start, end));
+ } else {
+ // Entry not describing executable data. Skip to end of line to setup
+ // reading the next entry.
+ do {
+ c = getc(fp);
+ } while ((c != EOF) && (c != '\n'));
+ if (c == EOF) break;
+ }
+ }
+ free(lib_name);
+ fclose(fp);
+#endif
+}
+
+
+void OS::SignalCodeMovingGC() {
+}
+
+
+int OS::StackWalk(Vector<OS::StackFrame> frames) {
+ // backtrace is a glibc extension.
+#ifdef __GLIBC__
+ 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;
+#else // ndef __GLIBC__
+ return 0;
+#endif // ndef __GLIBC__
+}
+
+
+// Constants used for mmap.
+static const int kMmapFd = -1;
+static const int kMmapFdOffset = 0;
+
+
+VirtualMemory::VirtualMemory(size_t size) {
+ address_ = mmap(NULL, size, PROT_NONE,
+ MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE,
+ kMmapFd, kMmapFdOffset);
+ size_ = size;
+}
+
+
+VirtualMemory::~VirtualMemory() {
+ if (IsReserved()) {
+ if (0 == munmap(address(), size())) address_ = MAP_FAILED;
+ }
+}
+
+
+bool VirtualMemory::IsReserved() {
+ return address_ != MAP_FAILED;
+}
+
+
+bool VirtualMemory::Commit(void* address, size_t size, bool is_executable) {
+ int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
+
+ if (mprotect(address, size, prot) != 0) {
+ return false;
+ }
+
+ UpdateAllocatedSpaceLimits(address, size);
+ return true;
+}
+
+
+bool VirtualMemory::Uncommit(void* address, size_t size) {
+ return mmap(address, size, PROT_NONE,
+ MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, // | MAP_FIXED, - Cygwin doesn't have MAP_FIXED
+ kMmapFd, kMmapFdOffset) != MAP_FAILED;
+}
+
+
+class ThreadHandle::PlatformData : public Malloced {
+ public:
+ explicit PlatformData(ThreadHandle::Kind kind) {
+ Initialize(kind);
+ }
+
+ void Initialize(ThreadHandle::Kind kind) {
+ switch (kind) {
+ case ThreadHandle::SELF: thread_ = pthread_self(); break;
+ case ThreadHandle::INVALID: thread_ = kNoThread; break;
+ }
+ }
+
+ pthread_t thread_; // Thread handle for pthread.
+};
+
+
+ThreadHandle::ThreadHandle(Kind kind) {
+ data_ = new PlatformData(kind);
+}
+
+
+void ThreadHandle::Initialize(ThreadHandle::Kind kind) {
+ data_->Initialize(kind);
+}
+
+
+ThreadHandle::~ThreadHandle() {
+ delete data_;
+}
+
+
+bool ThreadHandle::IsSelf() const {
+ return pthread_equal(data_->thread_, pthread_self());
+}
+
+
+bool ThreadHandle::IsValid() const {
+ return data_->thread_ != kNoThread;
+}
+
+
+Thread::Thread() : ThreadHandle(ThreadHandle::INVALID) {
+ set_name("v8:<unknown>");
+}
+
+
+Thread::Thread(const char* name) : ThreadHandle(ThreadHandle::INVALID) {
+ set_name(name);
+}
+
+
+Thread::~Thread() {
+}
+
+
+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->thread_handle_data()->thread_ = pthread_self();
+ ASSERT(thread->IsValid());
+ 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_create(&thread_handle_data()->thread_, NULL, ThreadEntry, this);
+ ASSERT(IsValid());
+}
+
+
+void Thread::Join() {
+ pthread_join(thread_handle_data()->thread_, NULL);
+}
+
+
+Thread::LocalStorageKey Thread::CreateThreadLocalKey() {
+ pthread_key_t key;
+ int result = pthread_key_create(&key, NULL);
+ USE(result);
+ ASSERT(result == 0);
+ return static_cast<LocalStorageKey>(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 CygwinMutex : public Mutex {
+ public:
+
+ CygwinMutex() {
+ pthread_mutexattr_t attrs;
+ memset(&attrs, 0, sizeof(attrs));
+
+ int result = pthread_mutexattr_init(&attrs);
+ ASSERT(result == 0);
+ result = pthread_mutexattr_settype(&attrs, PTHREAD_MUTEX_RECURSIVE);
+ ASSERT(result == 0);
+ result = pthread_mutex_init(&mutex_, &attrs);
+ ASSERT(result == 0);
+ }
+
+ virtual ~CygwinMutex() { pthread_mutex_destroy(&mutex_); }
+
+ virtual int Lock() {
+ int result = pthread_mutex_lock(&mutex_);
+ return result;
+ }
+
+ virtual int Unlock() {
+ int result = pthread_mutex_unlock(&mutex_);
+ return result;
+ }
+
+ 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 CygwinMutex();
+}
+
+
+class CygwinSemaphore : public Semaphore {
+ public:
+ explicit CygwinSemaphore(int count) { sem_init(&sem_, 0, count); }
+ virtual ~CygwinSemaphore() { sem_destroy(&sem_); }
+
+ virtual void Wait();
+ virtual bool Wait(int timeout);
+ virtual void Signal() { sem_post(&sem_); }
+ private:
+ sem_t sem_;
+};
+
+
+void CygwinSemaphore::Wait() {
+ while (true) {
+ int result = sem_wait(&sem_);
+ if (result == 0) return; // Successfully got semaphore.
+ CHECK(result == -1 && errno == EINTR); // Signal caused spurious wakeup.
+ }
+}
+
+
+#ifndef TIMEVAL_TO_TIMESPEC
+#define TIMEVAL_TO_TIMESPEC(tv, ts) do { \
+ (ts)->tv_sec = (tv)->tv_sec; \
+ (ts)->tv_nsec = (tv)->tv_usec * 1000; \
+} while (false)
+#endif
+
+
+bool CygwinSemaphore::Wait(int timeout) {
+ const long kOneSecondMicros = 1000000; // NOLINT
+
+ // Split timeout into second and nanosecond parts.
+ struct timeval delta;
+ delta.tv_usec = timeout % kOneSecondMicros;
+ delta.tv_sec = timeout / kOneSecondMicros;
+
+ struct timeval current_time;
+ // Get the current time.
+ if (gettimeofday(&current_time, NULL) == -1) {
+ return false;
+ }
+
+ // Calculate time for end of timeout.
+ struct timeval end_time;
+ timeradd(&current_time, &delta, &end_time);
+
+ struct timespec ts;
+ TIMEVAL_TO_TIMESPEC(&end_time, &ts);
+ // Wait for semaphore signalled or timeout.
+ while (true) {
+ int result = sem_timedwait(&sem_, &ts);
+ if (result == 0) return true; // Successfully got semaphore.
+ if (result > 0) {
+ // For glibc prior to 2.3.4 sem_timedwait returns the error instead of -1.
+ errno = result;
+ result = -1;
+ }
+ if (result == -1 && errno == ETIMEDOUT) return false; // Timeout.
+ CHECK(result == -1 && errno == EINTR); // Signal caused spurious wakeup.
+ }
+}
+
+
+Semaphore* OS::CreateSemaphore(int count) {
+ return new CygwinSemaphore(count);
+}
+
+
+#ifdef ENABLE_LOGGING_AND_PROFILING
+
+class Sampler::PlatformData : public Malloced {
+ public:
+ explicit PlatformData(Sampler* sampler)
+ : sampler_(sampler),
+ signal_handler_installed_(false) {
+ }
+
+ void SignalSender() {
+ }
+
+ void SendProfilingSignal() {
+ }
+
+ Sampler* sampler_;
+ bool signal_handler_installed_;
+ struct sigaction old_signal_handler_;
+};
+
+
+Sampler::Sampler(int interval)
+ : interval_(interval),
+ profiling_(false),
+ active_(false),
+ samples_taken_(0) {
+ data_ = new PlatformData(this);
+}
+
+
+Sampler::~Sampler() {
+ ASSERT(!data_->signal_sender_launched_);
+ delete data_;
+}
+
+
+void Sampler::Start() {
+ active_ = true;
+}
+
+
+void Sampler::Stop() {
+ active_ = false;
+}
+
+#endif // ENABLE_LOGGING_AND_PROFILING
+
+} } // namespace v8::internal
View
4 deps/v8/src/platform.h
@@ -383,10 +383,14 @@ class Thread: public ThreadHandle {
// LOCAL_STORAGE_KEY_MIN_VALUE and LOCAL_STORAGE_KEY_MAX_VALUE are specified
// to ensure that enumeration type has correct value range (see Issue 830 for
// more details).
+#ifdef __CYGWIN__
+ typedef void* LocalStorageKey;
+#else
enum LocalStorageKey {
LOCAL_STORAGE_KEY_MIN_VALUE = kMinInt,
LOCAL_STORAGE_KEY_MAX_VALUE = kMaxInt
};
+#endif
// Create new thread.
Thread();
View
2 deps/v8/tools/utils.py
@@ -49,6 +49,8 @@ def GuessOS():
return 'linux'
elif id == 'Darwin':
return 'macos'
+ elif id.find('CYGWIN') >= 0:
+ return 'cygwin'
elif id == 'Windows' or id == 'Microsoft':
# On Windows Vista platform.system() can return 'Microsoft' with some
# versions of Python, see http://bugs.python.org/issue1082

0 comments on commit fd013d1

Please sign in to comment.