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/stat.h>
9 #include <sys/time.h>
10 #include <sys/types.h>
11 #include <unistd.h>
12 #if !V8_OS_FUCHSIA
13 #include <sys/resource.h>
14 #endif
15 #endif
16
17 #if V8_OS_BSD
18 #include <sys/sysctl.h>
19 #endif
20
21 #include <limits>
22
23 #include "src/base/logging.h"
24 #include "src/base/macros.h"
25 #if V8_OS_WIN
26 #include "src/base/win32-headers.h"
27 #endif
28
29 namespace v8 {
30 namespace base {
31
32 // static
NumberOfProcessors()33 int SysInfo::NumberOfProcessors() {
34 #if V8_OS_OPENBSD
35 int mib[2] = {CTL_HW, HW_NCPU};
36 int ncpu = 0;
37 size_t len = sizeof(ncpu);
38 if (sysctl(mib, arraysize(mib), &ncpu, &len, nullptr, 0) != 0) {
39 return 1;
40 }
41 return ncpu;
42 #elif V8_OS_POSIX
43 long result = sysconf(_SC_NPROCESSORS_ONLN); // NOLINT(runtime/int)
44 if (result == -1) {
45 return 1;
46 }
47 return static_cast<int>(result);
48 #elif V8_OS_WIN
49 SYSTEM_INFO system_info = {};
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, nullptr, 0) != 0) {
63 return 0;
64 }
65 return memsize;
66 #elif V8_OS_FREEBSD
67 int pages, page_size;
68 size_t size = sizeof(pages);
69 sysctlbyname("vm.stats.vm.v_page_count", &pages, &size, nullptr, 0);
70 sysctlbyname("vm.stats.vm.v_page_size", &page_size, &size, nullptr, 0);
71 if (pages == -1 || page_size == -1) {
72 return 0;
73 }
74 return static_cast<int64_t>(pages) * page_size;
75 #elif V8_OS_CYGWIN || V8_OS_WIN
76 MEMORYSTATUSEX memory_info;
77 memory_info.dwLength = sizeof(memory_info);
78 if (!GlobalMemoryStatusEx(&memory_info)) {
79 return 0;
80 }
81 int64_t result = static_cast<int64_t>(memory_info.ullTotalPhys);
82 if (result < 0) result = std::numeric_limits<int64_t>::max();
83 return result;
84 #elif V8_OS_QNX
85 struct stat stat_buf;
86 if (stat("/proc", &stat_buf) != 0) {
87 return 0;
88 }
89 return static_cast<int64_t>(stat_buf.st_size);
90 #elif V8_OS_AIX
91 int64_t result = sysconf(_SC_AIX_REALMEM);
92 return static_cast<int64_t>(result) * 1024L;
93 #elif V8_OS_POSIX
94 long pages = sysconf(_SC_PHYS_PAGES); // NOLINT(runtime/int)
95 long page_size = sysconf(_SC_PAGESIZE); // NOLINT(runtime/int)
96 if (pages == -1 || page_size == -1) {
97 return 0;
98 }
99 return static_cast<int64_t>(pages) * page_size;
100 #endif
101 }
102
103
104 // static
AmountOfVirtualMemory()105 int64_t SysInfo::AmountOfVirtualMemory() {
106 #if V8_OS_WIN || V8_OS_FUCHSIA
107 return 0;
108 #elif V8_OS_POSIX
109 struct rlimit rlim;
110 int result = getrlimit(RLIMIT_DATA, &rlim);
111 if (result != 0) {
112 return 0;
113 }
114 return (rlim.rlim_cur == RLIM_INFINITY) ? 0 : rlim.rlim_cur;
115 #endif
116 }
117
118 } // namespace base
119 } // namespace v8
120