Implement lttng-list for userspace-probe
authorFrancis Deslauriers <francis.deslauriers@efficios.com>
Fri, 29 Jun 2018 19:28:30 +0000 (15:28 -0400)
committerJérémie Galarneau <jeremie.galarneau@efficios.com>
Fri, 24 Aug 2018 20:07:23 +0000 (16:07 -0400)
Here is an example of the output of the list command for a ELF function
userspace probe:
```
Event rules:
  userspace_probe_test_event (type: userspace-probe) [enabled]
    Type: Function
    Binary path:   /home/frdeso/projets/lttng/tools/tests/utils/testapp/userspace-probe-elf-binary/userspace-probe-elf-binary
    Function:      test_function()
    Lookup method: ELF
```

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
src/bin/lttng-sessiond/cmd.c
src/bin/lttng/commands/list.c

index f9e2bd6866f2caead30ac2cb0b6b892b69756b5e..4ae8a1a35a1ba57d4b2b7e6c364ddff61efe9cb2 100644 (file)
@@ -769,6 +769,9 @@ static int list_lttng_kernel_events(char *channel_name,
                        memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe,
                                        sizeof(struct lttng_kernel_kprobe));
                        break;
+               case LTTNG_KERNEL_UPROBE:
+                       (*events)[i].type = LTTNG_EVENT_USERSPACE_PROBE;
+                       break;
                case LTTNG_KERNEL_FUNCTION:
                        (*events)[i].type = LTTNG_EVENT_FUNCTION;
                        memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace,
index 4a94690b038b4ca20fe9839a01c51637bc457ceb..be252ab7600c3299e0243df68338b703d19c9fa7 100644 (file)
@@ -249,6 +249,82 @@ end:
        return exclusion_msg;
 }
 
+static void print_userspace_probe_location(struct lttng_event *event)
+{
+       struct lttng_userspace_probe_location *location;
+       struct lttng_userspace_probe_location_lookup_method *lookup_method;
+       enum lttng_userspace_probe_location_lookup_method_type lookup_type;
+
+       location = lttng_event_get_userspace_probe_location(event);
+       if (!location) {
+               MSG("Event has no userspace probe location");
+               return;
+       }
+
+       lookup_method = lttng_userspace_probe_location_get_lookup_method(location);
+       if (!lookup_method) {
+               MSG("Event has no userspace probe location lookup method");
+               return;
+       }
+
+       MSG("%s%s (type: userspace-probe)%s", indent6, event->name, enabled_string(event->enabled));
+
+       lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method);
+
+       switch (lttng_userspace_probe_location_get_type(location)) {
+       case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN:
+               MSG("%sType: Unknown", indent8);
+               break;
+       case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
+       {
+               const char *function_name;
+               const char *binary_path;
+
+               MSG("%sType: Function", indent8);
+               function_name = lttng_userspace_probe_location_function_get_function_name(location);
+               binary_path = realpath(lttng_userspace_probe_location_function_get_binary_path(location), NULL);
+
+               MSG("%sBinary path:   %s", indent8, binary_path ? binary_path : "NULL");
+               MSG("%sFunction:      %s()", indent8, function_name ? function_name : "NULL");
+               switch (lookup_type) {
+               case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
+                       MSG("%sLookup method: ELF", indent8);
+                       break;
+               case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT:
+                       MSG("%sLookup method: default", indent8);
+                       break;
+               default:
+                       MSG("%sLookup method: INVALID LOOKUP TYPE ENCOUNTERED", indent8);
+                       break;
+               }
+               break;
+       }
+       case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
+       {
+               const char *probe_name, *provider_name;
+               const char *binary_path;
+
+               MSG("%sType: Tracepoint", indent8);
+               probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location);
+               provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location);
+               binary_path = realpath(lttng_userspace_probe_location_tracepoint_get_binary_path(location), NULL);
+               MSG("%sBinary path:   %s", indent8, binary_path ? binary_path : "NULL");
+               MSG("%sTracepoint:    %s:%s", indent8, provider_name ? provider_name : "NULL", probe_name ? probe_name : "NULL");
+               switch (lookup_type) {
+               case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
+                       MSG("%sLookup method: SDT", indent8);
+                       break;
+               default:
+                       MSG("%sLookup method: INVALID LOOKUP TYPE ENCOUNTERED", indent8);
+                       break;
+               }
+               break;
+       }
+       default:
+               ERR("Invalid probe type encountered");
+       }
+}
+
 /*
  * Pretty print single event.
  */
@@ -324,6 +400,9 @@ static void print_events(struct lttng_event *event)
                        MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
                }
                break;
+       case LTTNG_EVENT_USERSPACE_PROBE:
+               print_userspace_probe_location(event);
+               break;
        case LTTNG_EVENT_FUNCTION_ENTRY:
                MSG("%s%s (type: function)%s%s", indent6,
                                event->name, enabled_string(event->enabled),
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