int main(int argc, char **argv) {
const char *appdir = fs_appdir();
if (!fs_mkdir(appdir)) {
LOG_FATAL("Failed to create app directory %s", appdir);
}
// load base options from config
char config[PATH_MAX] = {0};
snprintf(config, sizeof(config), "%s" PATH_SEPARATOR "config", appdir);
options_read(config);
// override options from the command line
options_parse(&argc, &argv);
if (OPTION_help) {
options_print_help();
return EXIT_SUCCESS;
}
if (!exception_handler_install()) {
LOG_WARNING("Failed to initialize exception handler");
return EXIT_FAILURE;
}
struct window *window = win_create();
if (!window) {
LOG_WARNING("Failed to initialize window");
return EXIT_FAILURE;
}
const char *load = argc > 1 ? argv[1] : NULL;
if (load && strstr(load, ".trace")) {
struct tracer *tracer = tracer_create(window);
tracer_run(tracer, load);
tracer_destroy(tracer);
} else {
struct emu *emu = emu_create(window);
emu_run(emu, load);
emu_destroy(emu);
}
win_destroy(window);
exception_handler_uninstall();
// persist options for next run
options_write(config);
return EXIT_SUCCESS;
}
int main (int argc, char *argv[])
{
pid_t pid;
int status = 1;
struct tracer *tracer = NULL;
struct process *process = NULL;
if (argc < 2)
return 1;
pid = fork ();
if (pid < 0)
{
perror ("fork");
return 2;
}
if (pid == 0)
fork_and_trace_child (argv);
if (wait_for_stopped (pid, false, &status))
{
fprintf (stderr, "child process unexpectedly dead\n");
return 3;
}
/*
When delivering syscall traps, set bit 7 in the signal number
(i.e., deliver SIGTRAP | 0x80). This makes it easy for the tracer
to tell the difference between normal traps and those caused by a
syscall. (PTRACE_O_TRACESYSGOOD may not work on all architectures.)
*/
if (ptrace (PTRACE_SETOPTIONS, pid, 0, PTRACE_O_TRACESYSGOOD) == -1)
return 5;
status = 1;
if (!(tracer = tracer_alloc ()))
{
fprintf (stderr, "Can not allocate tracer\n");
goto end;
}
if (!(process = process_alloc (pid)))
{
fprintf (stderr, "Can not allocate process\n");
goto end;
}
if (tracer_add_process (tracer, process) == -1)
{
fprintf (stderr, "Cannot add process to tracer\n");
goto end;
}
/* process = NULL should be here (!) */
for (;;)
{
struct user_regs_struct state1;
struct user_regs_struct state2;
if (wait_for_break (pid, &state1, &status))
break;
if (wait_for_break (pid, &state2, &status))
break;
trace_syscall (process, &state1, &state2);
}
process = NULL;
status &= 0xff;
end:
if (process)
process_destroy (process);
if (tracer)
tracer_destroy (tracer);
return status;
}
