platform-solaris.cc

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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
// Platform-specific code for Solaris 10 goes here. For the POSIX-compatible
// parts, the implementation is in platform-posix.cc.
 
#ifdef __sparc
# error "V8 does not support the SPARC CPU architecture."
#endif
 
#include <dlfcn.h>  // dladdr
#include <errno.h>
#include <ieeefp.h>  // finite()
#include <pthread.h>
#include <semaphore.h>
#include <signal.h>  // sigemptyset(), etc
#include <sys/mman.h>  // mmap()
#include <sys/regset.h>
#include <sys/stack.h>  // for stack alignment
#include <sys/time.h>  // gettimeofday(), timeradd()
#include <time.h>
#include <ucontext.h>  // walkstack(), getcontext()
#include <unistd.h>  // getpagesize(), usleep()
 
#include <cmath>
 
#undef MAP_TYPE
 
#include "src/base/macros.h"
#include "src/base/platform/platform-posix.h"
#include "src/base/platform/platform.h"
 
namespace v8 {
namespace base {
 
class SolarisTimezoneCache : public PosixTimezoneCache {
  const char* LocalTimezone(double time) override;
 
  double LocalTimeOffset(double time, bool is_utc) override;
  ~SolarisTimezoneCache() override {}
};
 
const char* SolarisTimezoneCache::LocalTimezone(double time) {
  if (std::isnan(time)) return "";
  time_t tv = static_cast<time_t>(std::floor(time/msPerSecond));
  struct tm tm;
  struct tm* t = localtime_r(&tv, &tm);
  if (nullptr == t) return "";
  return tzname[0];  // The location of the timezone string on Solaris.
}
 
double SolarisTimezoneCache::LocalTimeOffset(double time, bool is_utc) {
  tzset();
  return -static_cast<double>(timezone * msPerSecond);
}
 
TimezoneCache* OS::CreateTimezoneCache() { return new SolarisTimezoneCache(); }
 
std::vector<OS::SharedLibraryAddress> OS::GetSharedLibraryAddresses() {
  return std::vector<SharedLibraryAddress>();
}
 
void OS::SignalCodeMovingGC() {}
 
void OS::AdjustSchedulingParams() {}
 
std::optional<OS::MemoryRange> OS::GetFirstFreeMemoryRangeWithin(
    OS::Address boundary_start, OS::Address boundary_end, size_t minimum_size,
    size_t alignment) {
  return std::nullopt;
}
 
// static
Stack::StackSlot Stack::ObtainCurrentThreadStackStart() {
  pthread_attr_t attr;
  int error;
  pthread_attr_init(&attr);
  error = pthread_attr_get_np(pthread_self(), &attr);
  if (!error) {
    void* base;
    size_t size;
    error = pthread_attr_getstack(&attr, &base, &size);
    CHECK(!error);
    pthread_attr_destroy(&attr);
    return reinterpret_cast<uint8_t*>(base) + size;
  }
  pthread_attr_destroy(&attr);
  return nullptr;
}
 
}  // namespace base
}  // namespace v8