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160
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1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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2 * Permission is hereby granted, free of charge, to any person obtaining a copy
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3 * of this software and associated documentation files (the "Software"), to
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4 * deal in the Software without restriction, including without limitation the
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5 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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6 * sell copies of the Software, and to permit persons to whom the Software is
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7 * furnished to do so, subject to the following conditions:
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8 *
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9 * The above copyright notice and this permission notice shall be included in
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10 * all copies or substantial portions of the Software.
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11 *
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12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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14 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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15 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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16 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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17 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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18 * IN THE SOFTWARE.
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19 */
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20
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21 #include "uv.h"
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22 #include "internal.h"
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23
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24 #include <assert.h>
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25 #include <stdint.h>
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26 #include <errno.h>
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27
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28 #include <mach/mach.h>
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29 #include <mach/mach_time.h>
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30 #include <mach-o/dyld.h> /* _NSGetExecutablePath */
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31 #include <sys/resource.h>
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32 #include <sys/sysctl.h>
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33 #include <unistd.h> /* sysconf */
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34
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35 static uv_once_t once = UV_ONCE_INIT;
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36 static mach_timebase_info_data_t timebase;
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37
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38
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39 int uv__platform_loop_init(uv_loop_t* loop) {
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40 loop->cf_state = NULL;
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41
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42 if (uv__kqueue_init(loop))
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43 return UV__ERR(errno);
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44
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45 return 0;
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46 }
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47
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48
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49 void uv__platform_loop_delete(uv_loop_t* loop) {
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50 uv__fsevents_loop_delete(loop);
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51 }
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52
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53
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54 static void uv__hrtime_init_once(void) {
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55 if (KERN_SUCCESS != mach_timebase_info(&timebase))
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56 abort();
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57 }
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58
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59
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60 uint64_t uv__hrtime(uv_clocktype_t type) {
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61 uv_once(&once, uv__hrtime_init_once);
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62 return mach_continuous_time() * timebase.numer / timebase.denom;
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63 }
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64
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65
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66 int uv_exepath(char* buffer, size_t* size) {
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67 /* realpath(exepath) may be > PATH_MAX so double it to be on the safe side. */
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68 char abspath[PATH_MAX * 2 + 1];
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69 char exepath[PATH_MAX + 1];
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70 uint32_t exepath_size;
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71 size_t abspath_size;
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72
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73 if (buffer == NULL || size == NULL || *size == 0)
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74 return UV_EINVAL;
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75
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76 exepath_size = sizeof(exepath);
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77 if (_NSGetExecutablePath(exepath, &exepath_size))
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78 return UV_EIO;
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79
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80 if (realpath(exepath, abspath) != abspath)
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81 return UV__ERR(errno);
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82
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83 abspath_size = strlen(abspath);
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84 if (abspath_size == 0)
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85 return UV_EIO;
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86
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87 *size -= 1;
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88 if (*size > abspath_size)
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89 *size = abspath_size;
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90
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91 memcpy(buffer, abspath, *size);
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92 buffer[*size] = '\0';
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93
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94 return 0;
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95 }
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96
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97
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98 uint64_t uv_get_free_memory(void) {
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99 vm_statistics_data_t info;
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100 mach_msg_type_number_t count = sizeof(info) / sizeof(integer_t);
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101
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102 if (host_statistics(mach_host_self(), HOST_VM_INFO,
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103 (host_info_t)&info, &count) != KERN_SUCCESS) {
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104 return 0;
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105 }
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106
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107 return (uint64_t) info.free_count * sysconf(_SC_PAGESIZE);
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108 }
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109
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110
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111 uint64_t uv_get_total_memory(void) {
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112 uint64_t info;
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113 int which[] = {CTL_HW, HW_MEMSIZE};
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114 size_t size = sizeof(info);
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115
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116 if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
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117 return 0;
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118
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119 return (uint64_t) info;
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120 }
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121
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122
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123 uint64_t uv_get_constrained_memory(void) {
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124 return 0; /* Memory constraints are unknown. */
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125 }
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126
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127
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128 uint64_t uv_get_available_memory(void) {
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129 return uv_get_free_memory();
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130 }
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131
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132
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133 void uv_loadavg(double avg[3]) {
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134 struct loadavg info;
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135 size_t size = sizeof(info);
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136 int which[] = {CTL_VM, VM_LOADAVG};
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137
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138 if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0) < 0) return;
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139
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140 avg[0] = (double) info.ldavg[0] / info.fscale;
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141 avg[1] = (double) info.ldavg[1] / info.fscale;
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142 avg[2] = (double) info.ldavg[2] / info.fscale;
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143 }
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144
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145
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146 int uv_resident_set_memory(size_t* rss) {
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147 mach_msg_type_number_t count;
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148 task_basic_info_data_t info;
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149 kern_return_t err;
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150
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151 count = TASK_BASIC_INFO_COUNT;
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152 err = task_info(mach_task_self(),
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153 TASK_BASIC_INFO,
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154 (task_info_t) &info,
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155 &count);
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156 (void) &err;
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157 /* task_info(TASK_BASIC_INFO) cannot really fail. Anything other than
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158 * KERN_SUCCESS implies a libuv bug.
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159 */
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160 assert(err == KERN_SUCCESS);
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161 *rss = info.resident_size;
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162
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163 return 0;
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164 }
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165
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166
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167 int uv_uptime(double* uptime) {
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168 time_t now;
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169 struct timeval info;
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170 size_t size = sizeof(info);
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171 static int which[] = {CTL_KERN, KERN_BOOTTIME};
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172
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173 if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
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174 return UV__ERR(errno);
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175
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176 now = time(NULL);
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177 *uptime = now - info.tv_sec;
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178
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179 return 0;
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180 }
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181
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182 int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
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183 unsigned int ticks = (unsigned int)sysconf(_SC_CLK_TCK),
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184 multiplier = ((uint64_t)1000L / ticks);
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185 char model[512];
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186 uint64_t cpuspeed;
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187 size_t size;
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188 unsigned int i;
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189 natural_t numcpus;
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190 mach_msg_type_number_t msg_type;
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191 processor_cpu_load_info_data_t *info;
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192 uv_cpu_info_t* cpu_info;
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193
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194 size = sizeof(model);
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195 if (sysctlbyname("machdep.cpu.brand_string", &model, &size, NULL, 0) &&
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196 sysctlbyname("hw.model", &model, &size, NULL, 0)) {
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197 return UV__ERR(errno);
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198 }
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199
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200 cpuspeed = 0;
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201 size = sizeof(cpuspeed);
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202 sysctlbyname("hw.cpufrequency", &cpuspeed, &size, NULL, 0);
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203 if (cpuspeed == 0)
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204 /* If sysctl hw.cputype == CPU_TYPE_ARM64, the correct value is unavailable
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205 * from Apple, but we can hard-code it here to a plausible value. */
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206 cpuspeed = 2400000000U;
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207
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208 if (host_processor_info(mach_host_self(), PROCESSOR_CPU_LOAD_INFO, &numcpus,
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209 (processor_info_array_t*)&info,
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210 &msg_type) != KERN_SUCCESS) {
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211 return UV_EINVAL; /* FIXME(bnoordhuis) Translate error. */
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212 }
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213
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214 *cpu_infos = uv__malloc(numcpus * sizeof(**cpu_infos));
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215 if (!(*cpu_infos)) {
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216 vm_deallocate(mach_task_self(), (vm_address_t)info, msg_type);
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217 return UV_ENOMEM;
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218 }
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219
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220 *count = numcpus;
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221
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222 for (i = 0; i < numcpus; i++) {
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223 cpu_info = &(*cpu_infos)[i];
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224
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225 cpu_info->cpu_times.user = (uint64_t)(info[i].cpu_ticks[0]) * multiplier;
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226 cpu_info->cpu_times.nice = (uint64_t)(info[i].cpu_ticks[3]) * multiplier;
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227 cpu_info->cpu_times.sys = (uint64_t)(info[i].cpu_ticks[1]) * multiplier;
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228 cpu_info->cpu_times.idle = (uint64_t)(info[i].cpu_ticks[2]) * multiplier;
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229 cpu_info->cpu_times.irq = 0;
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230
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231 cpu_info->model = uv__strdup(model);
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232 cpu_info->speed = (int)(cpuspeed / 1000000);
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233 }
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234 vm_deallocate(mach_task_self(), (vm_address_t)info, msg_type);
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235
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236 return 0;
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237 }
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