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comparison src/os/linux/vm/os_linux.cpp @ 14658:d72cee0607a3

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8036122: Fix warning 'format not a string literal' Reviewed-by: mduigou, kvn
author goetz
date Mon, 03 Mar 2014 11:54:35 +0100
parents bb9356ec5967
children b51e29501f30
comparison
equal deleted inserted replaced
14657:4adcdd3ccb66 14658:d72cee0607a3
5282 // -1 on error. 5282 // -1 on error.
5283 // 5283 //
5284 5284
5285 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5285 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5286 static bool proc_task_unchecked = true; 5286 static bool proc_task_unchecked = true;
5287 static const char *proc_stat_path = "/proc/%d/stat";
5288 pid_t tid = thread->osthread()->thread_id(); 5287 pid_t tid = thread->osthread()->thread_id();
5289 char *s; 5288 char *s;
5290 char stat[2048]; 5289 char stat[2048];
5291 int statlen; 5290 int statlen;
5292 char proc_name[64]; 5291 char proc_name[64];
5295 char cdummy; 5294 char cdummy;
5296 int idummy; 5295 int idummy;
5297 long ldummy; 5296 long ldummy;
5298 FILE *fp; 5297 FILE *fp;
5299 5298
5299 snprintf(proc_name, 64, "/proc/%d/stat", tid);
5300
5300 // The /proc/<tid>/stat aggregates per-process usage on 5301 // The /proc/<tid>/stat aggregates per-process usage on
5301 // new Linux kernels 2.6+ where NPTL is supported. 5302 // new Linux kernels 2.6+ where NPTL is supported.
5302 // The /proc/self/task/<tid>/stat still has the per-thread usage. 5303 // The /proc/self/task/<tid>/stat still has the per-thread usage.
5303 // See bug 6328462. 5304 // See bug 6328462.
5304 // There possibly can be cases where there is no directory 5305 // There possibly can be cases where there is no directory
5306 if (proc_task_unchecked && os::Linux::is_NPTL()) { 5307 if (proc_task_unchecked && os::Linux::is_NPTL()) {
5307 // This is executed only once 5308 // This is executed only once
5308 proc_task_unchecked = false; 5309 proc_task_unchecked = false;
5309 fp = fopen("/proc/self/task", "r"); 5310 fp = fopen("/proc/self/task", "r");
5310 if (fp != NULL) { 5311 if (fp != NULL) {
5311 proc_stat_path = "/proc/self/task/%d/stat"; 5312 snprintf(proc_name, 64, "/proc/self/task/%d/stat", tid);
5312 fclose(fp); 5313 fclose(fp);
5313 } 5314 }
5314 } 5315 }
5315 5316
5316 sprintf(proc_name, proc_stat_path, tid);
5317 fp = fopen(proc_name, "r"); 5317 fp = fopen(proc_name, "r");
5318 if ( fp == NULL ) return -1; 5318 if ( fp == NULL ) return -1;
5319 statlen = fread(stat, 1, 2047, fp); 5319 statlen = fread(stat, 1, 2047, fp);
5320 stat[statlen] = '\0'; 5320 stat[statlen] = '\0';
5321 fclose(fp); 5321 fclose(fp);