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#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/shm.h>
#include <sys/mman.h>
#include "frida-gumjs.h"
#include "config.h"
#include "debug.h"
#include "util.h"
#include "stats.h"
#define MICRO_TO_SEC 1000000
stats_data_header_t *stats_data = NULL;
static int stats_parent_pid = -1;
static int stats_fd = -1;
char * stats_filename = NULL;
guint64 stats_interval = 0;
gboolean stats_transitions = FALSE;
void stats_config(void) {
stats_filename = getenv("AFL_FRIDA_STATS_FILE");
stats_interval = util_read_num("AFL_FRIDA_STATS_INTERVAL");
if (getenv("AFL_FRIDA_STATS_TRANSITIONS") != NULL) {
stats_transitions = TRUE;
}
}
void stats_init(void) {
stats_parent_pid = getpid();
OKF("Stats - file [%s]", stats_filename);
OKF("Stats - interval [%" G_GINT64_MODIFIER "u]", stats_interval);
if (stats_interval != 0 && stats_filename == NULL) {
FATAL(
"AFL_FRIDA_STATS_FILE must be specified if "
"AFL_FRIDA_STATS_INTERVAL is");
}
if (stats_interval == 0) { stats_interval = 10; }
if (stats_filename == NULL) { return; }
if (!stats_is_supported_arch()) {
FATAL("Stats is not supported on this architecture");
}
char *path = NULL;
if (stats_filename == NULL) { return; }
if (stats_transitions) { gum_stalker_set_counters_enabled(TRUE); }
path = g_canonicalize_filename(stats_filename, g_get_current_dir());
OKF("Stats - path [%s]", path);
stats_fd = open(path, O_RDWR | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
if (stats_fd < 0) { FATAL("Failed to open stats file '%s'", path); }
g_free(path);
size_t data_size = stats_data_size_arch();
int shm_id = shmget(IPC_PRIVATE, data_size, IPC_CREAT | IPC_EXCL | 0600);
if (shm_id < 0) { FATAL("shm_id < 0 - errno: %d\n", errno); }
stats_data = shmat(shm_id, NULL, 0);
g_assert(stats_data != MAP_FAILED);
/*
* Configure the shared memory region to be removed once the process dies.
*/
if (shmctl(shm_id, IPC_RMID, NULL) < 0) {
FATAL("shmctl (IPC_RMID) < 0 - errno: %d\n", errno);
}
/* Clear it, not sure it's necessary, just seems like good practice */
memset(stats_data, '\0', data_size);
}
void stats_vprint(int fd, char *format, va_list ap) {
char buffer[4096] = {0};
int len;
if (vsnprintf(buffer, sizeof(buffer) - 1, format, ap) < 0) { return; }
len = strnlen(buffer, sizeof(buffer));
IGNORED_RETURN(write(fd, buffer, len));
}
void stats_print_fd(int fd, char *format, ...) {
va_list ap;
va_start(ap, format);
stats_vprint(fd, format, ap);
va_end(ap);
}
void stats_print(char *format, ...) {
va_list ap;
va_start(ap, format);
stats_vprint(stats_fd, format, ap);
va_end(ap);
}
void stats_write(void) {
if (stats_parent_pid == getpid()) { return; }
GDateTime *date_time = g_date_time_new_now_local();
char *date_time_string = g_date_time_format(date_time, "%Y-%m-%e %H:%M:%S");
stats_print("stats\n");
stats_print("-----\n");
stats_print("Index: %" G_GINT64_MODIFIER "u\n",
stats_data->stats_idx++);
stats_print("Pid: %d\n", getpid());
stats_print("Time: %s\n", date_time_string);
stats_print("Blocks: %" G_GINT64_MODIFIER "u\n",
stats_data->num_blocks);
stats_print("Instructions: %" G_GINT64_MODIFIER "u\n",
stats_data->num_instructions);
stats_print("Avg Instructions / Block: %" G_GINT64_MODIFIER "u\n",
stats_data->num_instructions / stats_data->num_blocks);
stats_print("\n");
g_free(date_time_string);
g_date_time_unref(date_time);
stats_write_arch();
if (stats_transitions) {
GDateTime *date_time = g_date_time_new_now_local();
char *date_time_string = g_date_time_format(date_time, "%Y-%m-%e %H:%M:%S");
stats_print_fd(STDERR_FILENO, "stats\n");
stats_print_fd(STDERR_FILENO, "-----\n");
stats_print_fd(STDERR_FILENO, "Index: %" G_GINT64_MODIFIER "u\n",
stats_data->transitions_idx++);
stats_print_fd(STDERR_FILENO, "Pid: %d\n", getpid());
stats_print_fd(STDERR_FILENO, "Time: %s\n", date_time_string);
g_free(date_time_string);
g_date_time_unref(date_time);
gum_stalker_dump_counters();
}
}
void stats_on_fork(void) {
guint64 current_time;
if (stats_filename == NULL) { return; }
if (stats_interval == 0) { return; }
current_time = g_get_monotonic_time();
if ((current_time - stats_data->stats_last_time) >
(stats_interval * MICRO_TO_SEC)) {
stats_write();
stats_data->stats_last_time = current_time;
}
}
void stats_collect(const cs_insn *instr, gboolean begin) {
UNUSED_PARAMETER(instr);
UNUSED_PARAMETER(begin);
if (stats_fd < 0) { return; }
if (begin) { stats_data->num_blocks++; }
stats_data->num_instructions++;
stats_collect_arch(instr);
}
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