Add syscall listing support

[lttng-tools.git] / src / bin / lttng-sessiond / main.c

diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index a7f2394fda6041ed6692dee9971ee20f0ed98b0a..e5054735efd6279aec0fe5648a122dca3f366943 100644 (file)
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -70,6 +70,7 @@
 #include "agent-thread.h"
 #include "save.h"
 #include "load-session-thread.h"
+#include "syscall.h"
 
 #define CONSUMERD_FILE "lttng-consumerd"
 
@@ -642,6 +643,7 @@ static void cleanup(void)
                }
                DBG("Unloading kernel modules");
                modprobe_remove_lttng_all();
+               free(syscall_table);
        }
 
        close_consumer_sockets();
@@ -2826,6 +2828,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx, int sock,
        case LTTNG_LIST_DOMAINS:
        case LTTNG_LIST_CHANNELS:
        case LTTNG_LIST_EVENTS:
+       case LTTNG_LIST_SYSCALLS:
                break;
        default:
                /* Setup lttng message with no payload */
@@ -2844,6 +2847,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx, int sock,
        case LTTNG_CALIBRATE:
        case LTTNG_LIST_SESSIONS:
        case LTTNG_LIST_TRACEPOINTS:
+       case LTTNG_LIST_SYSCALLS:
        case LTTNG_LIST_TRACEPOINT_FIELDS:
        case LTTNG_SAVE_SESSION:
                need_tracing_session = 0;
@@ -3308,6 +3312,37 @@ skip_domain:
                ret = LTTNG_OK;
                break;
        }
+       case LTTNG_LIST_SYSCALLS:
+       {
+               struct lttng_event *events;
+               ssize_t nb_events;
+
+               nb_events = cmd_list_syscalls(&events);
+               if (nb_events < 0) {
+                       /* Return value is a negative lttng_error_code. */
+                       ret = -nb_events;
+                       goto error;
+               }
+
+               /*
+                * Setup lttng message with payload size set to the event list size in
+                * bytes and then copy list into the llm payload.
+                */
+               ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events);
+               if (ret < 0) {
+                       free(events);
+                       goto setup_error;
+               }
+
+               /* Copy event list into message payload */
+               memcpy(cmd_ctx->llm->payload, events,
+                               sizeof(struct lttng_event) * nb_events);
+
+               free(events);
+
+               ret = LTTNG_OK;
+               break;
+       }
        case LTTNG_SET_CONSUMER_URI:
        {
                size_t nb_uri, len;
@@ -5195,6 +5230,11 @@ int main(int argc, char **argv)
                /* Setup kernel tracer */
                if (!opt_no_kernel) {
                        init_kernel_tracer();
+                       ret = syscall_init_table();
+                       if (ret < 0) {
+                               ERR("Unable to populate syscall table. Syscall tracing won't"
+                                               " work for this session daemon.");
+                       }
                }
 
                /* Set ulimit for open files */