488 // or /tmp then this is the trigger to start the attach mechanism
489 bool AttachListener::is_init_trigger() {
490 if (init_at_startup() || is_initialized()) {
491 return false; // initialized at startup or already initialized
492 }
493 char fn[PATH_MAX+1];
494 sprintf(fn, ".attach_pid%d", os::current_process_id());
495 int ret;
496 struct stat64 st;
497 RESTARTABLE(::stat64(fn, &st), ret);
498 if (ret == -1) {
499 snprintf(fn, sizeof(fn), "%s/.attach_pid%d",
500 os::get_temp_directory(), os::current_process_id());
501 RESTARTABLE(::stat64(fn, &st), ret);
502 }
503 if (ret == 0) {
504 // simple check to avoid starting the attach mechanism when
505 // a bogus user creates the file
506 if (st.st_uid == geteuid()) {
507 init();
508 return true;
509 }
510 }
511 return false;
512 }
513
514 // if VM aborts then remove listener
515 void AttachListener::abort() {
516 listener_cleanup();
517 }
518
519 void AttachListener::pd_data_dump() {
520 os::signal_notify(SIGQUIT);
521 }
522
523 AttachOperationFunctionInfo* AttachListener::pd_find_operation(const char* n) {
524 return NULL;
525 }
526
527 jint AttachListener::pd_set_flag(AttachOperation* op, outputStream* out) {
528 out->print_cr("flag '%s' cannot be changed", op->arg(0));
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488 // or /tmp then this is the trigger to start the attach mechanism
489 bool AttachListener::is_init_trigger() {
490 if (init_at_startup() || is_initialized()) {
491 return false; // initialized at startup or already initialized
492 }
493 char fn[PATH_MAX+1];
494 sprintf(fn, ".attach_pid%d", os::current_process_id());
495 int ret;
496 struct stat64 st;
497 RESTARTABLE(::stat64(fn, &st), ret);
498 if (ret == -1) {
499 snprintf(fn, sizeof(fn), "%s/.attach_pid%d",
500 os::get_temp_directory(), os::current_process_id());
501 RESTARTABLE(::stat64(fn, &st), ret);
502 }
503 if (ret == 0) {
504 // simple check to avoid starting the attach mechanism when
505 // a bogus user creates the file
506 if (st.st_uid == geteuid()) {
507 init();
508 log_trace(attach)("Attach trigerred by %s", fn);
509 return true;
510 }
511 else {
512 log_debug(attach)("File %s has wrong user id %d (vs %d). Attach is not trigerred", fn, st.st_uid, geteuid());
513 }
514 }
515 return false;
516 }
517
518 // if VM aborts then remove listener
519 void AttachListener::abort() {
520 listener_cleanup();
521 }
522
523 void AttachListener::pd_data_dump() {
524 os::signal_notify(SIGQUIT);
525 }
526
527 AttachOperationFunctionInfo* AttachListener::pd_find_operation(const char* n) {
528 return NULL;
529 }
530
531 jint AttachListener::pd_set_flag(AttachOperation* op, outputStream* out) {
532 out->print_cr("flag '%s' cannot be changed", op->arg(0));
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