Implement event notifiers for syscalls

[lttng-modules.git] / src / lttng-events.c

diff --git a/src/lttng-events.c b/src/lttng-events.c
index 176c38326bc6f8bff15e96e2bf57f14bbcca4676..dff93ce6d93c3fabc838c4a33364a185e8a1c562 100644 (file)
--- a/src/lttng-events.c
+++ b/src/lttng-events.c
@@ -343,6 +343,8 @@ void lttng_event_notifier_group_destroy(
 
        irq_work_sync(&event_notifier_group->wakeup_pending);
 
+       kfree(event_notifier_group->sc_filter);
+
        list_for_each_entry_safe(event_notifier_enabler, tmp_event_notifier_enabler,
                        &event_notifier_group->enablers_head, node)
                lttng_event_notifier_enabler_destroy(event_notifier_enabler);
@@ -1098,6 +1100,29 @@ struct lttng_event_notifier *_lttng_event_notifier_create(
                event_notifier->enabled = 0;
                event_notifier->registered = 0;
                event_notifier->desc = event_desc;
+               switch (event_notifier_param->event.u.syscall.entryexit) {
+               case LTTNG_KERNEL_SYSCALL_ENTRYEXIT:
+                       ret = -EINVAL;
+                       goto register_error;
+               case LTTNG_KERNEL_SYSCALL_ENTRY:
+                       event_notifier->u.syscall.entryexit = LTTNG_SYSCALL_ENTRY;
+                       break;
+               case LTTNG_KERNEL_SYSCALL_EXIT:
+                       event_notifier->u.syscall.entryexit = LTTNG_SYSCALL_EXIT;
+                       break;
+               }
+               switch (event_notifier_param->event.u.syscall.abi) {
+               case LTTNG_KERNEL_SYSCALL_ABI_ALL:
+                       ret = -EINVAL;
+                       goto register_error;
+               case LTTNG_KERNEL_SYSCALL_ABI_NATIVE:
+                       event_notifier->u.syscall.abi = LTTNG_SYSCALL_ABI_NATIVE;
+                       break;
+               case LTTNG_KERNEL_SYSCALL_ABI_COMPAT:
+                       event_notifier->u.syscall.abi = LTTNG_SYSCALL_ABI_COMPAT;
+                       break;
+               }
+
                if (!event_notifier->desc) {
                        ret = -EINVAL;
                        goto register_error;
@@ -1732,7 +1757,7 @@ int lttng_desc_match_enabler(const struct lttng_event_desc *desc,
                        return -EINVAL;
                }
                switch (enabler->event_param.u.syscall.match) {
-               case LTTNG_SYSCALL_MATCH_NAME:
+               case LTTNG_KERNEL_SYSCALL_MATCH_NAME:
                        switch (enabler->format_type) {
                        case LTTNG_ENABLER_FORMAT_STAR_GLOB:
                                return lttng_match_enabler_star_glob(desc_name, enabler_name);
@@ -1742,7 +1767,7 @@ int lttng_desc_match_enabler(const struct lttng_event_desc *desc,
                                return -EINVAL;
                        }
                        break;
-               case LTTNG_SYSCALL_MATCH_NR:
+               case LTTNG_KERNEL_SYSCALL_MATCH_NR:
                        return -EINVAL; /* Not implemented. */
                default:
                        return -EINVAL;
@@ -1968,7 +1993,7 @@ int lttng_event_enabler_ref_events(struct lttng_event_enabler *event_enabler)
        if (base_enabler->event_param.instrumentation == LTTNG_KERNEL_SYSCALL &&
                        base_enabler->event_param.u.syscall.entryexit == LTTNG_KERNEL_SYSCALL_ENTRYEXIT &&
                        base_enabler->event_param.u.syscall.abi == LTTNG_KERNEL_SYSCALL_ABI_ALL &&
-                       base_enabler->event_param.u.syscall.match == LTTNG_SYSCALL_MATCH_NAME &&
+                       base_enabler->event_param.u.syscall.match == LTTNG_KERNEL_SYSCALL_MATCH_NAME &&
                        !strcmp(base_enabler->event_param.name, "*")) {
                if (base_enabler->enabled)
                        WRITE_ONCE(chan->syscall_all, 1);
@@ -2038,11 +2063,29 @@ void lttng_create_event_notifier_if_missing(struct lttng_event_notifier_enabler
  * Create event_notifiers associated with a event_notifier enabler (if not already present).
  */
 static
-int lttng_event_notifier_enabler_ref_event_notifiers(struct lttng_event_notifier_enabler *event_notifier_enabler)
+int lttng_event_notifier_enabler_ref_event_notifiers(
+               struct lttng_event_notifier_enabler *event_notifier_enabler)
 {
        struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group;
+       struct lttng_enabler *base_enabler = lttng_event_notifier_enabler_as_enabler(event_notifier_enabler);
        struct lttng_event_notifier *event_notifier;
 
+       if (base_enabler->event_param.instrumentation == LTTNG_KERNEL_SYSCALL &&
+                       base_enabler->event_param.u.syscall.abi == LTTNG_KERNEL_SYSCALL_ABI_ALL &&
+                       base_enabler->event_param.u.syscall.match == LTTNG_KERNEL_SYSCALL_MATCH_NAME &&
+                       !strcmp(base_enabler->event_param.name, "*")) {
+
+               int enabled = base_enabler->enabled;
+               enum lttng_kernel_syscall_entryexit entryexit = base_enabler->event_param.u.syscall.entryexit;
+
+               if (entryexit == LTTNG_KERNEL_SYSCALL_ENTRY || entryexit == LTTNG_KERNEL_SYSCALL_ENTRYEXIT)
+                       WRITE_ONCE(event_notifier_group->syscall_all_entry, enabled);
+
+               if (entryexit == LTTNG_KERNEL_SYSCALL_EXIT || entryexit == LTTNG_KERNEL_SYSCALL_ENTRYEXIT)
+                       WRITE_ONCE(event_notifier_group->syscall_all_exit, enabled);
+
+       }
+
        /* First ensure that probe event_notifiers are created for this enabler. */
        lttng_create_event_notifier_if_missing(event_notifier_enabler);
 
@@ -2274,9 +2317,8 @@ struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
        event_notifier_enabler->base.format_type = format_type;
        INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head);
 
-       memcpy(&event_notifier_enabler->base.event_param.name, event_notifier_param->event.name,
-               sizeof(event_notifier_enabler->base.event_param.name));
-       event_notifier_enabler->base.event_param.instrumentation = event_notifier_param->event.instrumentation;
+       memcpy(&event_notifier_enabler->base.event_param, &event_notifier_param->event,
+               sizeof(event_notifier_enabler->base.event_param));
        event_notifier_enabler->base.evtype = LTTNG_TYPE_ENABLER;
 
        event_notifier_enabler->base.enabled = 0;