int
syscall_entering_trace(struct tcb *tcp, unsigned int *sig)
{
/* Restrain from fault injection while the trace executes strace code. */
if (hide_log(tcp)) {
tcp->qual_flg &= ~QUAL_INJECT;
}
switch (tcp->s_ent->sen) {
case SEN_execve:
case SEN_execveat:
#if defined SPARC || defined SPARC64
case SEN_execv:
#endif
tcp->flags &= ~TCB_HIDE_LOG;
break;
}
if (!traced(tcp) || (tracing_paths && !pathtrace_match(tcp))) {
tcp->flags |= TCB_FILTERED;
return 0;
}
tcp->flags &= ~TCB_FILTERED;
if (hide_log(tcp)) {
return 0;
}
if (inject(tcp))
tamper_with_syscall_entering(tcp, sig);
if (cflag == CFLAG_ONLY_STATS) {
return 0;
}
#ifdef USE_LIBUNWIND
if (stack_trace_enabled) {
if (tcp->s_ent->sys_flags & STACKTRACE_CAPTURE_ON_ENTER)
unwind_capture_stacktrace(tcp);
}
#endif
printleader(tcp);
tprintf("%s(", tcp->s_ent->sys_name);
int res = raw(tcp) ? printargs(tcp) : tcp->s_ent->sys_func(tcp);
fflush(tcp->outf);
return res;
}
int main(int argc, char *argv[])
{
if (argc != 2)
{
usage();
exit(1);
}
long long row_id = atoll(argv[1]);
if (row_id < 1)
{
fprintf(stderr, "No valid row_id: %s\n", argv[1]);
usage();
exit(1);
}
char *cmd = get_command(row_id);
if (cmd == NULL)
{
fprintf(stderr, "Error: Could not read job command\n");
exit(1);
}
pid_t childpid;
if ((childpid = fork()) == -1)
{
perror("fork failed\n");
exit(1);
}
if (childpid == 0)
{
//child
char *args[] = {cmd, NULL};
execv(args[0], args);
return 0; // dead code, just to avoid GCC warning
}
else
{
// parent
drmaa2_save_pid(row_id, childpid);
pid_t child;
int status;
child = waitpid(childpid, &status, 0);
drmaa2_save_exit_status(row_id, status);
if (WIFEXITED(status))
{
DRMAA2_DEBUG_PRINT("Process terminated normally by a call to _exit(2) or exit(3).\n");
DRMAA2_DEBUG_PRINT("%d - evaluates to the low-order 8 bits of the argument passed to _exit(2) or exit(3) by the child.\n", WEXITSTATUS(status));
}
if (WIFSIGNALED(status))
{
DRMAA2_DEBUG_PRINT("Process terminated due to receipt of a signal.\n");
DRMAA2_DEBUG_PRINT("%d - evaluates to the number of the signal that caused the termination of the process.\n", WTERMSIG(status));
DRMAA2_DEBUG_PRINT("%d - evaluates as true if the termination of the process was accompanied by the creation of a core \
file containing an image of the process when the signal was received.\n", WCOREDUMP(status));
}
if (WIFSTOPPED(status))
{
DRMAA2_DEBUG_PRINT("Process has not terminated, but has stopped and can be restarted. This macro can be true only if the wait call \
specified the WUNTRACED option or if the child process is being traced (see ptrace(2)).\n");
DRMAA2_DEBUG_PRINT("%d - evaluates to the number of the signal that caused the process to stop.\n", WSTOPSIG(status));
}
return 0;
}
}
