static int bootchart_step() {
do_log_file(log_stat, "/proc/stat");
do_log_file(log_disks, "/proc/diskstats");
do_log_procs(log_procs);
// Stop if /data/bootchart/stop contains 1.
std::string stop;
if (android::base::ReadFileToString(LOG_STOPFILE, &stop) && stop == "1") {
return -1;
}
return 0;
}
/* called each time you want to perform a bootchart sampling op */
int bootchart_step( void )
{
do_log_file(log_stat, "/proc/stat");
do_log_file(log_disks, "/proc/diskstats");
do_log_procs(log_procs);
/* we stop when /data/bootchart-stop contains 1 */
{
char buff[2];
if (proc_read(LOG_STOPFILE,buff,sizeof(buff)) > 0 && buff[0] == '1') {
return -1;
}
}
return 0;
}
static void
do_log_procs(FileBuff log, int old_pid)
{
DIR* dir;
struct dirent* entry;
if (!old_pid) {
dir = opendir("/proc");
do_log_uptime(log);
} else {
char tmp[1024];
snprintf(tmp, sizeof(tmp), "/proc/%d/task", old_pid);
dir = opendir(tmp);
}
if (!dir)
return;
while ((entry = readdir(dir)) != NULL) {
/* only match numeric values */
char* end;
int pid = strtol( entry->d_name, &end, 10);
if (end != NULL && end > entry->d_name && *end == 0) {
char filename[32];
char buff[1024];
char cmdline[1024];
int len;
int fd;
if (pid == old_pid)
continue;
/* read command line and extract program name */
snprintf(filename,sizeof(filename),"/proc/%d/cmdline",pid);
proc_read(filename, cmdline, sizeof(cmdline));
/* read process stat line */
snprintf(filename,sizeof(filename),"/proc/%d/stat",pid);
fd = open(filename,O_RDONLY);
if (fd >= 0) {
len = unix_read(fd, buff, sizeof(buff)-1);
close(fd);
if (len > 0) {
int len2 = strlen(cmdline);
if (len2 > 0) {
/* we want to substitute the process name with its real name */
const char* p1;
const char* p2;
buff[len] = 0;
p1 = strchr(buff, '(');
p2 = strchr(p1, ')');
file_buff_write(log, buff, p1+1-buff);
file_buff_write(log, cmdline, strlen(cmdline));
file_buff_write(log, p2, strlen(p2));
} else {
/* no substitution */
file_buff_write(log,buff,len);
}
}
}
if (old_pid == 0)
do_log_procs(log, pid);
}
}
if (!old_pid)
do_log_ln(log);
closedir(dir);
}
