static int panic_exit(struct notifier_block *self, unsigned long unused1, void *unused2) { bust_spinlocks(1); bust_spinlocks(0); uml_exitcode = 1; os_dump_core(); return 0; }
static int panic_exit(struct notifier_block *self, unsigned long unused1, void *unused2) { bust_spinlocks(1); show_regs(&(current->thread.regs)); bust_spinlocks(0); uml_exitcode = 1; os_dump_core(); return 0; }
void fatal_sigsegv(void) { force_sigsegv(SIGSEGV, current); do_signal(); /* * This is to tell gcc that we're not returning - do_signal * can, in general, return, but in this case, it's not, since * we just got a fatal SIGSEGV queued. */ os_dump_core(); }
static #endif void handle_nudge(dcontext_t *dcontext, nudge_arg_t *arg) { uint nudge_action_mask = arg->nudge_action_mask; /* Future version checks would go here. */ ASSERT_CURIOSITY(arg->version == NUDGE_ARG_CURRENT_VERSION); /* Nudge shouldn't start with any locks held. Do this assert after the * dynamo_exited check, other wise the locks may be deleted. */ ASSERT_OWN_NO_LOCKS(); STATS_INC(num_nudges); #ifdef WINDOWS /* Linux does this in signal.c */ SYSLOG_INTERNAL_INFO("received nudge mask=0x%x id=0x%08x arg=0x"ZHEX64_FORMAT_STRING, arg->nudge_action_mask, arg->client_id, arg->client_arg); #endif if (nudge_action_mask == 0) { ASSERT_CURIOSITY(false && "Nudge: no action specified"); return; } else if (nudge_action_mask >= NUDGE_GENERIC(PARAMETRIZED_END)) { ASSERT(false && "Nudge: unknown nudge action"); return; } /* In -thin_client mode only detach and process_control nudges are allowed; * case 8888. */ #define VALID_THIN_CLIENT_NUDGES (NUDGE_GENERIC(process_control)|NUDGE_GENERIC(detach)) if (DYNAMO_OPTION(thin_client)) { if (TEST(VALID_THIN_CLIENT_NUDGES, nudge_action_mask)) { /* If it is a valid thin client nudge, then disable all others. */ nudge_action_mask &= VALID_THIN_CLIENT_NUDGES; } else { return; /* invalid nudge for thin_client, so mute it */ } } /* FIXME: NYI action handlers. As implemented move to desired order. */ if (TEST(NUDGE_GENERIC(upgrade), nudge_action_mask)) { /* FIXME: watch out for flushed clean-call fragment */ nudge_action_mask &= ~NUDGE_GENERIC(upgrade); ASSERT_NOT_IMPLEMENTED(false && "case 4179"); } if (TEST(NUDGE_GENERIC(kstats), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(kstats); ASSERT_NOT_IMPLEMENTED(false); } #ifdef INTERNAL if (TEST(NUDGE_GENERIC(stats), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(stats); ASSERT_NOT_IMPLEMENTED(false); } if (TEST(NUDGE_GENERIC(invalidate), nudge_action_mask)) { /* FIXME: watch out for flushed clean-call fragment */ nudge_action_mask &= ~NUDGE_GENERIC(invalidate); ASSERT_NOT_IMPLEMENTED(false); } if (TEST(NUDGE_GENERIC(recreate_pc), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(recreate_pc); ASSERT_NOT_IMPLEMENTED(false); } if (TEST(NUDGE_GENERIC(recreate_state), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(recreate_state); ASSERT_NOT_IMPLEMENTED(false); } if (TEST(NUDGE_GENERIC(reattach), nudge_action_mask)) { /* FIXME: watch out for flushed clean-call fragment */ nudge_action_mask &= ~NUDGE_GENERIC(reattach); ASSERT_NOT_IMPLEMENTED(false); } #endif /* INTERNAL */ if (TEST(NUDGE_GENERIC(diagnose), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(diagnose); ASSERT_NOT_IMPLEMENTED(false); } /* Implemented action handlers */ if (TEST(NUDGE_GENERIC(opt), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(opt); synchronize_dynamic_options(); } if (TEST(NUDGE_GENERIC(ldmp), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(ldmp); os_dump_core("Nudge triggered ldmp."); } if (TEST(NUDGE_GENERIC(freeze), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(freeze); coarse_units_freeze_all(true/*in-place: FIXME: separate nudge for non?*/); } if (TEST(NUDGE_GENERIC(persist), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(persist); coarse_units_freeze_all(false/*!in-place==persist*/); } #ifdef CLIENT_INTERFACE if (TEST(NUDGE_GENERIC(client), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(client); instrument_nudge(dcontext, arg->client_id, arg->client_arg); } #endif #ifdef PROCESS_CONTROL if (TEST(NUDGE_GENERIC(process_control), nudge_action_mask)) { /* Case 8594 */ nudge_action_mask &= ~NUDGE_GENERIC(process_control); /* Need to synchronize because process control can be switched between * on (white or black list) & off. FIXME - the nudge mask should specify this, * but doesn't hurt to do it again. */ synchronize_dynamic_options(); if (IS_PROCESS_CONTROL_ON()) process_control(); /* If process control is enforced then control won't come back. If * either -detect_mode is on or if there was nothing to enforce, control * comes back in which case it is safe to let remaining nudges be * processed because no core state would have been changed. */ } #endif #ifdef HOTPATCHING if (DYNAMO_OPTION(hot_patching) && DYNAMO_OPTION(liveshields) && TEST_ANY(NUDGE_GENERIC(policy)|NUDGE_GENERIC(mode)|NUDGE_GENERIC(lstats), nudge_action_mask)) { hotp_nudge_update(nudge_action_mask & (NUDGE_GENERIC(policy)|NUDGE_GENERIC(mode)|NUDGE_GENERIC(lstats))); nudge_action_mask &= ~(NUDGE_GENERIC(policy)|NUDGE_GENERIC(mode)|NUDGE_GENERIC(lstats)); } #endif #ifdef PROGRAM_SHEPHERDING if (TEST(NUDGE_GENERIC(violation), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(violation); /* Use nudge mechanism to trigger a security violation at an * arbitrary time. Note - is only useful for testing kill process attack * handling as this is not an app thread (we injected it). */ /* see bug 652 for planned improvements */ security_violation(dcontext, dcontext->next_tag, ATTACK_SIM_NUDGE_VIOLATION, OPTION_BLOCK|OPTION_REPORT); } #endif if (TEST(NUDGE_GENERIC(reset), nudge_action_mask)) { nudge_action_mask &= ~NUDGE_GENERIC(reset); if (DYNAMO_OPTION(enable_reset)) { mutex_lock(&reset_pending_lock); /* fcache_reset_all_caches_proactively() will unlock */ fcache_reset_all_caches_proactively(RESET_ALL); /* NOTE - reset is safe since we won't return to the code cache below (we * will in fact not return at all). */ } else { SYSLOG_INTERNAL_WARNING("nudge reset ignored since resets are disabled"); } } #ifdef WINDOWS /* The detach handler is last since in the common case it doesn't return. */ if (TEST(NUDGE_GENERIC(detach), nudge_action_mask)) { dcontext->free_app_stack = false; nudge_action_mask &= ~NUDGE_GENERIC(detach); detach_helper(DETACH_NORMAL_TYPE); } #endif }