1 // Copyright 2014 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "src/base/sys-info.h"
6
7 #if V8_OS_POSIX
8 #include <sys/resource.h>
9 #include <sys/stat.h>
10 #include <sys/time.h>
11 #include <sys/types.h>
12 #include <unistd.h>
13 #endif
14
15 #if V8_OS_BSD
16 #include <sys/sysctl.h>
17 #endif
18
19 #include <limits>
20
21 #include "src/base/logging.h"
22 #include "src/base/macros.h"
23 #if V8_OS_WIN
24 #include "src/base/win32-headers.h"
25 #endif
26
27 namespace v8 {
28 namespace base {
29
30 // static
NumberOfProcessors()31 int SysInfo::NumberOfProcessors() {
32 #if V8_OS_OPENBSD
33 int mib[2] = {CTL_HW, HW_NCPU};
34 int ncpu = 0;
35 size_t len = sizeof(ncpu);
36 if (sysctl(mib, arraysize(mib), &ncpu, &len, NULL, 0) != 0) {
37 UNREACHABLE();
38 return 1;
39 }
40 return ncpu;
41 #elif V8_OS_POSIX
42 long result = sysconf(_SC_NPROCESSORS_ONLN); // NOLINT(runtime/int)
43 if (result == -1) {
44 UNREACHABLE();
45 return 1;
46 }
47 return static_cast<int>(result);
48 #elif V8_OS_WIN
49 SYSTEM_INFO system_info = {0};
50 ::GetNativeSystemInfo(&system_info);
51 return static_cast<int>(system_info.dwNumberOfProcessors);
52 #endif
53 }
54
55
56 // static
AmountOfPhysicalMemory()57 int64_t SysInfo::AmountOfPhysicalMemory() {
58 #if V8_OS_MACOSX
59 int mib[2] = {CTL_HW, HW_MEMSIZE};
60 int64_t memsize = 0;
61 size_t len = sizeof(memsize);
62 if (sysctl(mib, arraysize(mib), &memsize, &len, NULL, 0) != 0) {
63 UNREACHABLE();
64 return 0;
65 }
66 return memsize;
67 #elif V8_OS_FREEBSD
68 int pages, page_size;
69 size_t size = sizeof(pages);
70 sysctlbyname("vm.stats.vm.v_page_count", &pages, &size, NULL, 0);
71 sysctlbyname("vm.stats.vm.v_page_size", &page_size, &size, NULL, 0);
72 if (pages == -1 || page_size == -1) {
73 UNREACHABLE();
74 return 0;
75 }
76 return static_cast<int64_t>(pages) * page_size;
77 #elif V8_OS_CYGWIN || V8_OS_WIN
78 MEMORYSTATUSEX memory_info;
79 memory_info.dwLength = sizeof(memory_info);
80 if (!GlobalMemoryStatusEx(&memory_info)) {
81 UNREACHABLE();
82 return 0;
83 }
84 int64_t result = static_cast<int64_t>(memory_info.ullTotalPhys);
85 if (result < 0) result = std::numeric_limits<int64_t>::max();
86 return result;
87 #elif V8_OS_QNX
88 struct stat stat_buf;
89 if (stat("/proc", &stat_buf) != 0) {
90 UNREACHABLE();
91 return 0;
92 }
93 return static_cast<int64_t>(stat_buf.st_size);
94 #elif V8_OS_NACL
95 // No support for _SC_PHYS_PAGES, assume 2GB.
96 return static_cast<int64_t>(1) << 31;
97 #elif V8_OS_POSIX
98 long pages = sysconf(_SC_PHYS_PAGES); // NOLINT(runtime/int)
99 long page_size = sysconf(_SC_PAGESIZE); // NOLINT(runtime/int)
100 if (pages == -1 || page_size == -1) {
101 UNREACHABLE();
102 return 0;
103 }
104 return static_cast<int64_t>(pages) * page_size;
105 #endif
106 }
107
108
109 // static
AmountOfVirtualMemory()110 int64_t SysInfo::AmountOfVirtualMemory() {
111 #if V8_OS_NACL || V8_OS_WIN
112 return 0;
113 #elif V8_OS_POSIX
114 struct rlimit rlim;
115 int result = getrlimit(RLIMIT_DATA, &rlim);
116 if (result != 0) {
117 UNREACHABLE();
118 return 0;
119 }
120 return (rlim.rlim_cur == RLIM_INFINITY) ? 0 : rlim.rlim_cur;
121 #endif
122 }
123
124 } // namespace base
125 } // namespace v8
126