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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() 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 (NULL == t) return "";
return tzname[0]; // The location of the timezone string on Solaris.
}
double SolarisTimezoneCache::LocalTimeOffset() {
tzset();
return -static_cast<double>(timezone * msPerSecond);
}
TimezoneCache* OS::CreateTimezoneCache() { return new SolarisTimezoneCache(); }
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(NULL, msize, prot, MAP_PRIVATE | MAP_ANON, -1, 0);
if (mbase == MAP_FAILED) return NULL;
*allocated = msize;
return mbase;
}
std::vector<OS::SharedLibraryAddress> OS::GetSharedLibraryAddresses() {
return std::vector<SharedLibraryAddress>();
}
void OS::SignalCodeMovingGC() {
}
// Constants used for mmap.
static const int kMmapFd = -1;
static const int kMmapFdOffset = 0;
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) {
DCHECK((alignment % OS::AllocateAlignment()) == 0);
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_ANONYMOUS | MAP_NORESERVE,
kMmapFd,
kMmapFdOffset);
if (reservation == MAP_FAILED) return;
uint8_t* base = static_cast<uint8_t*>(reservation);
uint8_t* aligned_base = RoundUp(base, alignment);
DCHECK_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());
DCHECK_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;
}
DCHECK(aligned_size == request_size);
address_ = static_cast<void*>(aligned_base);
size_ = aligned_size;
}
VirtualMemory::~VirtualMemory() {
if (IsReserved()) {
bool result = ReleaseRegion(address(), size());
DCHECK(result);
USE(result);
}
}
bool VirtualMemory::IsReserved() {
return address_ != NULL;
}
void VirtualMemory::Reset() {
address_ = NULL;
size_ = 0;
}
bool VirtualMemory::Commit(void* address, size_t size, bool is_executable) {
return CommitRegion(address, size, is_executable);
}
bool VirtualMemory::Uncommit(void* address, size_t size) {
return UncommitRegion(address, size);
}
bool VirtualMemory::Guard(void* address) {
OS::Guard(address, OS::CommitPageSize());
return true;
}
void* VirtualMemory::ReserveRegion(size_t size) {
void* result = mmap(OS::GetRandomMmapAddr(),
size,
PROT_NONE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE,
kMmapFd,
kMmapFdOffset);
if (result == MAP_FAILED) return NULL;
return result;
}
bool VirtualMemory::CommitRegion(void* base, size_t size, bool is_executable) {
int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
if (MAP_FAILED == mmap(base,
size,
prot,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
kMmapFd,
kMmapFdOffset)) {
return false;
}
return true;
}
bool VirtualMemory::UncommitRegion(void* base, size_t size) {
return mmap(base,
size,
PROT_NONE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE | MAP_FIXED,
kMmapFd,
kMmapFdOffset) != MAP_FAILED;
}
bool VirtualMemory::ReleasePartialRegion(void* base, size_t size,
void* free_start, size_t free_size) {
return munmap(free_start, free_size) == 0;
}
bool VirtualMemory::ReleaseRegion(void* base, size_t size) {
return munmap(base, size) == 0;
}
bool VirtualMemory::HasLazyCommits() {
// TODO(alph): implement for the platform.
return false;
}
} // namespace base
} // namespace v8
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