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// Copyright 2014 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.
#include "src/base/sys-info.h"
#if V8_OS_POSIX
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#endif
#if V8_OS_BSD
#include <sys/sysctl.h>
#endif
#include <limits>
#include "src/base/logging.h"
#include "src/base/macros.h"
#if V8_OS_WIN
#include "src/base/win32-headers.h"
#endif
namespace v8 {
namespace base {
// static
int SysInfo::NumberOfProcessors() {
#if V8_OS_OPENBSD
int mib[2] = {CTL_HW, HW_NCPU};
int ncpu = 0;
size_t len = sizeof(ncpu);
if (sysctl(mib, arraysize(mib), &ncpu, &len, NULL, 0) != 0) {
UNREACHABLE();
return 1;
}
return ncpu;
#elif V8_OS_POSIX
long result = sysconf(_SC_NPROCESSORS_ONLN); // NOLINT(runtime/int)
if (result == -1) {
UNREACHABLE();
return 1;
}
return static_cast<int>(result);
#elif V8_OS_WIN
SYSTEM_INFO system_info = {0};
::GetNativeSystemInfo(&system_info);
return static_cast<int>(system_info.dwNumberOfProcessors);
#endif
}
// static
int64_t SysInfo::AmountOfPhysicalMemory() {
#if V8_OS_MACOSX
int mib[2] = {CTL_HW, HW_MEMSIZE};
int64_t memsize = 0;
size_t len = sizeof(memsize);
if (sysctl(mib, arraysize(mib), &memsize, &len, NULL, 0) != 0) {
UNREACHABLE();
return 0;
}
return memsize;
#elif V8_OS_FREEBSD
int pages, page_size;
size_t size = sizeof(pages);
sysctlbyname("vm.stats.vm.v_page_count", &pages, &size, NULL, 0);
sysctlbyname("vm.stats.vm.v_page_size", &page_size, &size, NULL, 0);
if (pages == -1 || page_size == -1) {
UNREACHABLE();
return 0;
}
return static_cast<int64_t>(pages) * page_size;
#elif V8_OS_CYGWIN || V8_OS_WIN
MEMORYSTATUSEX memory_info;
memory_info.dwLength = sizeof(memory_info);
if (!GlobalMemoryStatusEx(&memory_info)) {
UNREACHABLE();
return 0;
}
int64_t result = static_cast<int64_t>(memory_info.ullTotalPhys);
if (result < 0) result = std::numeric_limits<int64_t>::max();
return result;
#elif V8_OS_QNX
struct stat stat_buf;
if (stat("/proc", &stat_buf) != 0) {
UNREACHABLE();
return 0;
}
return static_cast<int64_t>(stat_buf.st_size);
#elif V8_OS_NACL
// No support for _SC_PHYS_PAGES, assume 2GB.
return static_cast<int64_t>(1) << 31;
#elif V8_OS_POSIX
long pages = sysconf(_SC_PHYS_PAGES); // NOLINT(runtime/int)
long page_size = sysconf(_SC_PAGESIZE); // NOLINT(runtime/int)
if (pages == -1 || page_size == -1) {
UNREACHABLE();
return 0;
}
return static_cast<int64_t>(pages) * page_size;
#endif
}
// static
int64_t SysInfo::AmountOfVirtualMemory() {
#if V8_OS_NACL || V8_OS_WIN
return 0;
#elif V8_OS_POSIX
struct rlimit rlim;
int result = getrlimit(RLIMIT_DATA, &rlim);
if (result != 0) {
UNREACHABLE();
return 0;
}
return (rlim.rlim_cur == RLIM_INFINITY) ? 0 : rlim.rlim_cur;
#endif
}
} // namespace base
} // namespace v8
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