int command_source(debugger_state_t *state, int argc, char **argv) {
if (argc != 2) {
state->print(state, "%s `file` - read a file and run its commands\n", argv[0]);
return 0;
}
FILE *rc = fopen(argv[1], "r");
if (rc == 0) {
state->print(state, "File couldn't be read: '%s'\n", strerror(errno));
return 1;
}
char filebuffer[256];
while(fgets(filebuffer, 256, rc)) {
filebuffer[strlen(filebuffer) - 1] = 0; // drop the \n at the end
if (filebuffer[0] == '#' || filebuffer[0] == 0) {
continue;
}
if (debugger_exec(state, filebuffer) < 0) {
return 1;
}
}
return 0;
}
int main(int argc, char** argv) {
(void) argc;
debugmode = getenv("DEBUG") != 0;
pid_t child;
int retval;
debugger_state dbga, *d = &dbga;
debugger_event de;
size_t childcount = 1;
size_t c;
debugger_state_init(d);
if((c = debugger_exec(d, argv[1], &argv[1], environ)) == (size_t) -1) {
dprintf(2, "failed to launch debuggee\n");
return 1;
}
dprintf(2, "child pid %d\n", debugger_pid_from_pidindex(d, c));
if(!debugger_wait_syscall(d, c)) return 1;
while(1) {
size_t childs_alive = 0;
for (c = 0; c < childcount; c++) {
child = debugger_pid_from_pidindex(d, c);
if(child == -1) continue;
childs_alive++;
de = debugger_get_events(d, c, &retval, 0);
if(de != DE_NONE) {
vprintf(2, "DE: %s\n", debugger_get_event_name(de));
if(de == DE_SYSCALL_ENTER || de == DE_SYSCALL_RETURN) {
long sc = debugger_get_syscall_number(d, c);
vprintf(2, "syscall: %s (#%ld) (proc %zu)\n", syscall_get_name(sc), sc, c);
if(de == DE_SYSCALL_ENTER &&
sc == SYS_mmap
#if defined SYS_mmap2
|| sc == SYS_mmap2
#endif
) {
//debugger_set_syscall_number(d, child, SYS_exit);
int i = 1;
for(; i < 7; i++) {
long arg = debugger_get_syscall_arg(d, c, i);
vprintf(2, "arg %d : %p\n", i, (void*) arg);
if(i == 4) debugger_set_syscall_arg(d, c, 4, arg | MAP_32BIT);
}
}
if(!debugger_wait_syscall(d, c)) return 1;
} else if (de == DE_EXIT) {
dprintf(2, "got de_exit from %zu, return val %d\n", c, retval);
debugger_continue(d, c);
debugger_set_pid(d, c, -1);
continue;
} else if (de == DE_CLONE) {
debugger_add_pid(d, retval);
childcount = debugger_get_pidcount(d);
dprintf(2, "got clone, childcount: %zu, lwp pid = %d\n", childcount, retval);
usleep(1); /* we need to sleep for a tiny amount, otherwise PTRACE_SYSCALL
will fail with "no such process" */
if(!debugger_wait_syscall(d, childcount - 1)) return 1;
//usleep(1);
if(!debugger_wait_syscall(d, c)) return 1;
}
}
}
if(!childs_alive) return 0;
usleep(1);
}
}
