/**
* opd_open_files - open necessary files
*
* Open the device files and the log file,
* and mmap() the hash map.
*/
static void opd_open_files(void)
{
devfd = op_open_device("/dev/oprofile/buffer");
if (devfd == -1) {
if (errno == EINVAL)
fprintf(stderr, "Failed to open device. Possibly you have passed incorrect\n"
"parameters. Check /var/log/messages.");
else
perror("Failed to open profile device");
exit(EXIT_FAILURE);
}
/* give output before re-opening stdout as the logfile */
printf("Using log file %s\n", op_log_file);
/* set up logfile */
close(0);
close(1);
if (open("/dev/null", O_RDONLY) == -1) {
perror("oprofiled: couldn't re-open stdin as /dev/null: ");
exit(EXIT_FAILURE);
}
opd_open_logfile();
opd_create_pipe();
printf("oprofiled started %s", op_get_time());
printf("kernel pointer size: %lu\n",
(unsigned long)kernel_pointer_size);
fflush(stdout);
}
static void opd_sigterm(void)
{
opd_do_jitdumps();
opd_print_stats();
printf("oprofiled stopped %s", op_get_time());
exit(EXIT_FAILURE);
}
static void opd_26_exit(void)
{
opd_print_stats();
printf("oprofiled stopped %s", op_get_time());
free(sbuf);
free(vmlinux);
/* FIXME: free kernel images, sfiles etc. */
}
static void opd_24_exit(void)
{
opd_print_24_stats();
printf("oprofiled stopped %s", op_get_time());
free(sbuf);
free(nbuf);
opd_clear_module_info();
opd_proc_cleanup();
opd_for_each_image(opd_delete_image);
}
void opd_print_stats(void)
{
DIR * dir;
struct dirent * dirent;
printf("\n%s\n", op_get_time());
printf("\n-- OProfile Statistics --\n");
printf("Nr. sample dumps: %lu\n", opd_stats[OPD_DUMP_COUNT]);
printf("Nr. non-backtrace samples: %lu\n", opd_stats[OPD_SAMPLES]);
printf("Nr. kernel samples: %lu\n", opd_stats[OPD_KERNEL]);
printf("Nr. lost samples (no kernel/user): %lu\n", opd_stats[OPD_NO_CTX]);
printf("Nr. lost kernel samples: %lu\n", opd_stats[OPD_LOST_KERNEL]);
printf("Nr. incomplete code structs: %lu\n", opd_stats[OPD_DANGLING_CODE]);
printf("Nr. samples lost due to sample file open failure: %lu\n",
opd_stats[OPD_LOST_SAMPLEFILE]);
printf("Nr. samples lost due to no permanent mapping: %lu\n",
opd_stats[OPD_LOST_NO_MAPPING]);
print_if("Nr. event lost due to buffer overflow: %u\n",
"/dev/oprofile/stats", "event_lost_overflow", 1);
print_if("Nr. samples lost due to no mapping: %u\n",
"/dev/oprofile/stats", "sample_lost_no_mapping", 1);
print_if("Nr. backtraces skipped due to no file mapping: %u\n",
"/dev/oprofile/stats", "bt_lost_no_mapping", 0);
print_if("Nr. samples lost due to no mm: %u\n",
"/dev/oprofile/stats", "sample_lost_no_mm", 1);
opd_ext_print_stats();
if (!(dir = opendir("/dev/oprofile/stats/")))
goto out;
while ((dirent = readdir(dir))) {
int cpu_nr;
char path[256];
if (sscanf(dirent->d_name, "cpu%d", &cpu_nr) != 1)
continue;
snprintf(path, 256, "/dev/oprofile/stats/%s", dirent->d_name);
printf("\n---- Statistics for cpu : %d\n", cpu_nr);
print_if("Nr. samples lost cpu buffer overflow: %u\n",
path, "sample_lost_overflow", 1);
print_if("Nr. samples lost task exit: %u\n",
path, "sample_lost_task_exit", 0);
print_if("Nr. samples received: %u\n",
path, "sample_received", 1);
print_if("Nr. backtrace aborted: %u\n",
path, "backtrace_aborted", 0);
print_if("Nr. samples lost invalid pc: %u\n",
path, "sample_invalid_eip", 0);
}
closedir(dir);
out:
fflush(stdout);
}
static void op_open_files(void)
{
hashmapdevfd = op_open_device(op_hash_device);
if (hashmapdevfd == -1) {
perror("Failed to open hash map device");
exit(EXIT_FAILURE);
}
notedevfd = op_open_device(op_note_device);
if (notedevfd == -1) {
if (errno == EINVAL)
fprintf(stderr, "Failed to open note device. Possibly you have passed incorrect\n"
"parameters. Check /var/log/messages.");
else
perror("Failed to open note device");
exit(EXIT_FAILURE);
}
devfd = op_open_device(op_device);
if (devfd == -1) {
if (errno == EINVAL)
fprintf(stderr, "Failed to open device. Possibly you have passed incorrect\n"
"parameters. Check /var/log/messages.");
else
perror("Failed to open profile device");
exit(EXIT_FAILURE);
}
opd_init_hash_map();
printf("Using log file %s\n", op_log_file);
close(0);
close(1);
if (open("/dev/null", O_RDONLY) == -1) {
perror("oprofiled: couldn't re-open stdin as /dev/null: ");
exit(EXIT_FAILURE);
}
opd_open_logfile();
printf("oprofiled started %s", op_get_time());
fflush(stdout);
}
