- strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN - 1);
- ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
- ev.instrumentation = LTTNG_KERNEL_SYSCALL;
- event = _lttng_event_create(chan, &ev, filter,
- desc, ev.instrumentation);
- WARN_ON_ONCE(!event);
- if (IS_ERR(event)) {
- /*
- * If something goes wrong in event registration
- * after the first one, we have no choice but to
- * leave the previous events in there, until
- * deleted by session teardown.
- */
- return PTR_ERR(event);
- }
- hlist_add_head(&event->u.syscall.node, &chan_table[i]);
- }
- return 0;
-}
-
-/*
- * Should be called with sessions lock held.
- */
-int lttng_syscalls_register_event(struct lttng_event_enabler *event_enabler, void *filter)
-{
- struct lttng_channel *chan = event_enabler->chan;
- struct lttng_kernel_event ev;
- int ret;
-
- wrapper_vmalloc_sync_mappings();
-
- if (!chan->sc_table) {
- /* create syscall table mapping syscall to events */
- chan->sc_table = kzalloc(sizeof(struct lttng_event *)
- * ARRAY_SIZE(sc_table), GFP_KERNEL);
- if (!chan->sc_table)
- return -ENOMEM;
- }
- if (!chan->sc_exit_table) {
- /* create syscall table mapping syscall to events */
- chan->sc_exit_table = kzalloc(sizeof(struct lttng_event *)
- * ARRAY_SIZE(sc_exit_table), GFP_KERNEL);
- if (!chan->sc_exit_table)
- return -ENOMEM;
- }
-
-
-#ifdef CONFIG_COMPAT
- if (!chan->compat_sc_table) {
- /* create syscall table mapping compat syscall to events */
- chan->compat_sc_table = kzalloc(sizeof(struct lttng_event *)
- * ARRAY_SIZE(compat_sc_table), GFP_KERNEL);
- if (!chan->compat_sc_table)
- return -ENOMEM;
- }
-
- if (!chan->compat_sc_exit_table) {
- /* create syscall table mapping compat syscall to events */
- chan->compat_sc_exit_table = kzalloc(sizeof(struct lttng_event *)
- * ARRAY_SIZE(compat_sc_exit_table), GFP_KERNEL);
- if (!chan->compat_sc_exit_table)
- return -ENOMEM;
- }
-#endif
- if (hlist_empty(&chan->sc_unknown)) {
- const struct lttng_event_desc *desc =
- &__event_desc___syscall_entry_unknown;
- struct lttng_event *event;
-
- memset(&ev, 0, sizeof(ev));
- strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
- ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
- ev.instrumentation = LTTNG_KERNEL_SYSCALL;
- ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_ENTRY;
- ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_NATIVE;
- event = _lttng_event_create(chan, &ev, filter, desc,
- ev.instrumentation);
- WARN_ON_ONCE(!event);
- if (IS_ERR(event)) {
- return PTR_ERR(event);
- }
- hlist_add_head(&event->u.syscall.node, &chan->sc_unknown);
- }
-
- if (hlist_empty(&chan->sc_compat_unknown)) {
- const struct lttng_event_desc *desc =
- &__event_desc___compat_syscall_entry_unknown;
- struct lttng_event *event;
-
- memset(&ev, 0, sizeof(ev));
- strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
- ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
- ev.instrumentation = LTTNG_KERNEL_SYSCALL;
- ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_ENTRY;
- ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_COMPAT;
- event = _lttng_event_create(chan, &ev, filter, desc,
- ev.instrumentation);
- WARN_ON_ONCE(!event);
- if (IS_ERR(event)) {
- return PTR_ERR(event);
- }
- hlist_add_head(&event->u.syscall.node, &chan->sc_compat_unknown);
- }
-
- if (hlist_empty(&chan->compat_sc_exit_unknown)) {
- const struct lttng_event_desc *desc =
- &__event_desc___compat_syscall_exit_unknown;
- struct lttng_event *event;
-
- memset(&ev, 0, sizeof(ev));
- strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
- ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
- ev.instrumentation = LTTNG_KERNEL_SYSCALL;
- ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_EXIT;
- ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_COMPAT;
- event = _lttng_event_create(chan, &ev, filter, desc,
- ev.instrumentation);
- WARN_ON_ONCE(!event);
- if (IS_ERR(event)) {
- return PTR_ERR(event);
- }
- hlist_add_head(&event->u.syscall.node, &chan->compat_sc_exit_unknown);
- }
-
- if (hlist_empty(&chan->sc_exit_unknown)) {
- const struct lttng_event_desc *desc =
- &__event_desc___syscall_exit_unknown;
- struct lttng_event *event;
-
- memset(&ev, 0, sizeof(ev));
- strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
- ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
- ev.instrumentation = LTTNG_KERNEL_SYSCALL;
- ev.u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_EXIT;
- ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_NATIVE;
- event = _lttng_event_create(chan, &ev, filter, desc,
- ev.instrumentation);
- WARN_ON_ONCE(!event);