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Tag: v0.3.7
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#include "node.h"
#include "platform.h"
#include <v8.h>
#include <sys/param.h> // for MAXPATHLEN
#include <sys/sysctl.h>
#include <sys/sysinfo.h>
#include <unistd.h> // getpagesize, sysconf
#include <stdio.h> // sscanf, snprintf
/* SetProcessTitle */
#include <sys/prctl.h>
#include <linux/prctl.h>
#include <stdlib.h> // free
#include <string.h> // strdup
namespace node {
using namespace v8;
static char buf[MAXPATHLEN + 1];
static char *process_title;
char** Platform::SetupArgs(int argc, char *argv[]) {
process_title = strdup(argv[0]);
return argv;
}
void Platform::SetProcessTitle(char *title) {
if (process_title) free(process_title);
process_title = strdup(title);
prctl(PR_SET_NAME, process_title);
}
const char* Platform::GetProcessTitle(int *len) {
if (process_title) {
*len = strlen(process_title);
return process_title;
}
*len = 0;
return NULL;
}
int Platform::GetMemory(size_t *rss, size_t *vsize) {
FILE *f = fopen("/proc/self/stat", "r");
if (!f) return -1;
int itmp;
char ctmp;
size_t page_size = getpagesize();
char *cbuf;
bool foundExeEnd;
/* PID */
if (fscanf(f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* Exec file */
cbuf = buf;
foundExeEnd = false;
if (fscanf (f, "%c", cbuf++) == 0) goto error; // (
while (1) {
if (fscanf(f, "%c", cbuf) == 0) goto error;
if (*cbuf == ')') {
foundExeEnd = true;
} else if (foundExeEnd && *cbuf == ' ') {
*cbuf = 0;
break;
}
cbuf++;
}
/* State */
if (fscanf (f, "%c ", &ctmp) == 0) goto error; /* coverity[secure_coding] */
/* Parent process */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* Process group */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* Session id */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* TTY */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* TTY owner process group */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* Flags */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* Minor faults (no memory page) */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* Minor faults, children */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* Major faults (memory page faults) */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* Major faults, children */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* utime */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* stime */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* utime, children */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* stime, children */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* jiffies remaining in current time slice */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* 'nice' value */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* jiffies until next timeout */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* jiffies until next SIGALRM */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* start time (jiffies since system boot) */
if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* Virtual memory size */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
*vsize = (size_t) itmp;
/* Resident set size */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
*rss = (size_t) itmp * page_size;
/* rlim */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* Start of text */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* End of text */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
/* Start of stack */
if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */
fclose (f);
return 0;
error:
fclose (f);
return -1;
}
int Platform::GetExecutablePath(char* buffer, size_t* size) {
*size = readlink("/proc/self/exe", buffer, *size - 1);
if (*size <= 0) return -1;
buffer[*size] = '\0';
return 0;
}
int Platform::GetCPUInfo(Local<Array> *cpus) {
HandleScope scope;
Local<Object> cpuinfo;
Local<Object> cputimes;
unsigned int ticks = (unsigned int)sysconf(_SC_CLK_TCK),
multiplier = ((uint64_t)1000L / ticks), cpuspeed;
int numcpus = 0, i = 0;
unsigned long long ticks_user, ticks_sys, ticks_idle, ticks_nice, ticks_intr;
char line[512], speedPath[256], model[512];
FILE *fpStat = fopen("/proc/stat", "r");
FILE *fpModel = fopen("/proc/cpuinfo", "r");
FILE *fpSpeed;
if (fpModel) {
while (fgets(line, 511, fpModel) != NULL) {
if (strncmp(line, "model name", 10) == 0) {
numcpus++;
if (numcpus == 1) {
char *p = strchr(line, ':') + 2;
strcpy(model, p);
model[strlen(model)-1] = 0;
}
} else if (strncmp(line, "cpu MHz", 7) == 0) {
if (numcpus == 1) {
sscanf(line, "%*s %*s : %u", &cpuspeed);
}
}
}
fclose(fpModel);
}
*cpus = Array::New(numcpus);
if (fpStat) {
while (fgets(line, 511, fpStat) != NULL) {
if (strncmp(line, "cpu ", 4) == 0)
continue;
else if (strncmp(line, "intr ", 5) == 0)
break;
sscanf(line, "%*s %llu %llu %llu %llu %*llu %llu",
&ticks_user, &ticks_nice, &ticks_sys, &ticks_idle, &ticks_intr);
snprintf(speedPath, sizeof(speedPath),
"/sys/devices/system/cpu/cpu%u/cpufreq/cpuinfo_max_freq", i);
fpSpeed = fopen(speedPath, "r");
if (fpSpeed) {
if (fgets(line, 511, fpSpeed) != NULL) {
sscanf(line, "%u", &cpuspeed);
cpuspeed /= 1000;
}
fclose(fpSpeed);
}
cpuinfo = Object::New();
cputimes = Object::New();
cputimes->Set(String::New("user"), Number::New(ticks_user * multiplier));
cputimes->Set(String::New("nice"), Number::New(ticks_nice * multiplier));
cputimes->Set(String::New("sys"), Number::New(ticks_sys * multiplier));
cputimes->Set(String::New("idle"), Number::New(ticks_idle * multiplier));
cputimes->Set(String::New("irq"), Number::New(ticks_intr * multiplier));
cpuinfo->Set(String::New("model"), String::New(model));
cpuinfo->Set(String::New("speed"), Number::New(cpuspeed));
cpuinfo->Set(String::New("times"), cputimes);
(*cpus)->Set(i++, cpuinfo);
}
fclose(fpStat);
}
return 0;
}
double Platform::GetFreeMemory() {
double pagesize = static_cast<double>(sysconf(_SC_PAGESIZE));
double pages = static_cast<double>(sysconf(_SC_AVPHYS_PAGES));
return static_cast<double>(pages * pagesize);
}
double Platform::GetTotalMemory() {
double pagesize = static_cast<double>(sysconf(_SC_PAGESIZE));
double pages = static_cast<double>(sysconf(_SC_PHYS_PAGES));
return pages * pagesize;
}
double Platform::GetUptime() {
struct sysinfo info;
if (sysinfo(&info) < 0) {
return -1;
}
return static_cast<double>(info.uptime);
}
int Platform::GetLoadAvg(Local<Array> *loads) {
struct sysinfo info;
if (sysinfo(&info) < 0) {
return -1;
}
(*loads)->Set(0, Number::New(static_cast<double>(info.loads[0]) / 65536.0));
(*loads)->Set(1, Number::New(static_cast<double>(info.loads[1]) / 65536.0));
(*loads)->Set(2, Number::New(static_cast<double>(info.loads[2]) / 65536.0));
return 0;
}
} // namespace node
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