print syscall origin on exit_syscall
[lttngtop.git] / src / lttngtop.c
index bfae663182c0cb89a9dd0d59da74a5627d66f09a..e9f240bed29cf67d9e63ba3f265db1e5f17b8d6f 100644 (file)
 #include "common.h"
 #include "network-live.h"
 
-#include "lttng-index.h"
+#define NET_URL_PREFIX "net://"
+#define NET4_URL_PREFIX        "net4://"
+#define NET6_URL_PREFIX        "net6://"
 
 #define DEFAULT_FILE_ARRAY_SIZE 1
 
 const char *opt_input_path;
-static int opt_textdump;
-static int opt_child;
-static int opt_begin;
+int opt_textdump;
+int opt_child;
+int opt_begin;
 
 int quit = 0;
 
@@ -81,7 +83,7 @@ GPtrArray *available_snapshots;
 sem_t metadata_available;
 int reload_trace = 0;
 
-int last_textdump_print_newline = 1;
+uint64_t prev_ts = 0;
 
 enum {
        OPT_NONE = 0,
@@ -212,12 +214,14 @@ void print_fields(struct bt_ctf_event *event)
 enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_data)
 {
        unsigned long timestamp;
+       uint64_t delta;
        struct tm start;
        uint64_t ts_nsec_start;
-       int pid, cpu_id;
-       int64_t syscall_ret;
+       int pid, cpu_id, tid;
        const struct bt_definition *scope;
        const char *hostname, *procname;
+       struct cputime *cpu;
+       char *from_syscall = NULL;
 
        timestamp = bt_ctf_get_timestamp(call_data);
 
@@ -234,42 +238,76 @@ enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_dat
        if (pid == -1ULL && opt_tid) {
                goto error;
        }
+
+       tid = get_context_tid(call_data);
        
        hostname = get_context_hostname(call_data);
-       if (opt_tid || opt_hostname)
-               if (!lookup_filter_tid_list(pid))
-                       goto end;
+       if (opt_tid || opt_hostname) {
+               if (!lookup_filter_tid_list(pid)) {
+                       /* To display when a process of ours in getting scheduled in */
+                       if (strcmp(bt_ctf_event_name(call_data), "sched_switch") == 0) {
+                               int next_tid;
+
+                               scope = bt_ctf_get_top_level_scope(call_data,
+                                               BT_EVENT_FIELDS);
+                               next_tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
+                                                       scope, "_next_tid"));
+                               if (bt_ctf_field_get_error()) {
+                                       fprintf(stderr, "Missing next_tid field\n");
+                                       goto error;
+                               }
+                               if (!lookup_filter_tid_list(next_tid)) {
+                                       goto end;
+                               }
+                       } else {
+                               goto end;
+                       }
+               }
+       }
 
        cpu_id = get_cpu_id(call_data);
        procname = get_context_comm(call_data);
-
-       if ((strcmp(bt_ctf_event_name(call_data), "exit_syscall") == 0) &&
-                       !last_textdump_print_newline) {
-               scope = bt_ctf_get_top_level_scope(call_data,
-                               BT_EVENT_FIELDS);
-               syscall_ret = bt_ctf_get_int64(bt_ctf_get_field(call_data,
-                                       scope, "_ret"));
-               printf("= %ld\n", syscall_ret);
-               last_textdump_print_newline = 1;
-       } else {
-               /* we might have lost the exit_syscall event, so need to
-                * print the newline in this case */
-               if (last_textdump_print_newline == 0)
-                       printf("\n");
-               printf("%02d:%02d:%02d.%09" PRIu64 " (%s) (cpu %d) [%s (%d)] %s (",
-                               start.tm_hour, start.tm_min, start.tm_sec,
-                               ts_nsec_start, hostname, cpu_id, procname, pid,
-                               bt_ctf_event_name(call_data));
-               print_fields(call_data);
-               printf(") ");
-               if (strncmp(bt_ctf_event_name(call_data), "sys_", 4) != 0) {
-                       printf("\n");
-                       last_textdump_print_newline = 1;
-               } else {
-                       last_textdump_print_newline = 0;
+       if (strncmp(bt_ctf_event_name(call_data), "sys_", 4) == 0) {
+               cpu = get_cpu(cpu_id);
+               cpu->current_syscall = g_new0(struct syscall, 1);
+               cpu->current_syscall->name = strdup(bt_ctf_event_name(call_data));
+               cpu->current_syscall->ts_start = timestamp;
+       } else if ((strncmp(bt_ctf_event_name(call_data), "exit_syscall", 12)) == 0) {
+               struct tm start_ts;
+
+               cpu = get_cpu(cpu_id);
+               if (cpu->current_syscall) {
+                       delta = timestamp - cpu->current_syscall->ts_start;
+                       start_ts = format_timestamp(cpu->current_syscall->ts_start);
+                       asprintf(&from_syscall, " [from %02d:%02d:%02d.%09" PRIu64
+                                       " (+%" PRIu64 ".%09" PRIu64 ") (cpu %d) %s]\n",
+                                       start_ts.tm_hour, start_ts.tm_min, start_ts.tm_sec,
+                                       cpu->current_syscall->ts_start % NSEC_PER_SEC,
+                                       delta / NSEC_PER_SEC, delta % NSEC_PER_SEC,
+                                       cpu_id, cpu->current_syscall->name);
+                       free(cpu->current_syscall->name);
+                       g_free(cpu->current_syscall);
+                       cpu->current_syscall = NULL;
                }
        }
 
+       if (prev_ts == 0)
+               prev_ts = timestamp;
+       delta = timestamp - prev_ts;
+       prev_ts = timestamp;
+
+       printf("%02d:%02d:%02d.%09" PRIu64 " (+%" PRIu64 ".%09" PRIu64 ") %s%s"
+                       "(cpu %d) [%s (%d/%d)] %s (",
+                       start.tm_hour, start.tm_min, start.tm_sec,
+                       ts_nsec_start, delta / NSEC_PER_SEC,
+                       delta % NSEC_PER_SEC, (hostname) ? hostname : "",
+                       (hostname) ? " ": "", cpu_id, procname, pid, tid,
+                       bt_ctf_event_name(call_data));
+       print_fields(call_data);
+       printf(")%s", (from_syscall) ? from_syscall : "\n");
+
+       free(from_syscall);
+
 end:
        return BT_CB_OK;
 error:
@@ -540,8 +578,8 @@ void init_lttngtop()
 void usage(FILE *fp)
 {
        fprintf(fp, "LTTngTop %s\n\n", VERSION);
-       fprintf(fp, "Usage : lttngtop [OPTIONS] [TRACE]\n");
-       fprintf(fp, "  TRACE                    Path to the trace to analyse (no trace path for live tracing)\n");
+       fprintf(fp, "Usage : lttngtop [OPTIONS] TRACE\n");
+       fprintf(fp, "  TRACE                    Path to the trace to analyse (-r for network live tracing, nothing for mmap live streaming)\n");
        fprintf(fp, "  -h, --help               This help message\n");
        fprintf(fp, "  -t, --textdump           Display live events in text-only\n");
        fprintf(fp, "  -p, --pid                Comma-separated list of PIDs to display\n");
@@ -653,7 +691,6 @@ static int parse_options(int argc, char **argv)
                                opt_textdump = 1;
                                break;
                        case OPT_CHILD:
-                               opt_textdump = 1;
                                opt_child = 1;
                                break;
                        case OPT_PID:
@@ -733,6 +770,10 @@ void iter_trace(struct bt_context *bt_ctx)
        bt_ctf_iter_add_callback(iter, 0, NULL, 0,
                        fix_process_table,
                        NULL, NULL, NULL);
+       /* to handle the follow child option */
+       bt_ctf_iter_add_callback(iter,
+                       g_quark_from_static_string("sched_process_fork"),
+                       NULL, 0, handle_sched_process_fork, NULL, NULL, NULL);
        if (opt_textdump) {
                bt_ctf_iter_add_callback(iter, 0, NULL, 0,
                                print_timestamp,
@@ -831,6 +872,19 @@ int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
        char * const paths[2] = { lpath, NULL };
        int ret = -1;
 
+       if ((strncmp(path, NET4_URL_PREFIX, sizeof(NET4_URL_PREFIX) - 1)) == 0 ||
+                       (strncmp(path, NET6_URL_PREFIX, sizeof(NET6_URL_PREFIX) - 1)) == 0 ||
+                       (strncmp(path, NET_URL_PREFIX, sizeof(NET_URL_PREFIX) - 1)) == 0) {
+               ret = bt_context_add_trace(ctx,
+                               path, format_str, packet_seek, NULL, NULL);
+               if (ret < 0) {
+                       fprintf(stderr, "[warning] [Context] cannot open trace \"%s\" "
+                                       "for reading.\n", path);
+                       /* Allow to skip erroneous traces. */
+                       ret = 1;        /* partial error */
+               }
+               return ret;
+       }
        /*
         * Need to copy path, because fts_open can change it.
         * It is the pointer array, not the strings, that are constant.
@@ -1039,11 +1093,15 @@ int main(int argc, char **argv)
 
                goto end;
 #else
-               fprintf(stderr, "Mmap live support not compiled\n");
+               fprintf(stderr, "[ERROR] Mmap live support not compiled, specify a "
+                               "trace directory or -r <relayd hostname/IP>\n");
+               usage(stdout);
+               ret = -1;
                goto end;
 #endif /* LTTNGTOP_MMAP_LIVE */
        } else if (!opt_input_path && remote_live) {
                /* network live */
+#if 0
                ret = setup_network_live(opt_relay_hostname, opt_begin);
                if (ret < 0) {
                        goto end;
@@ -1053,6 +1111,15 @@ int main(int argc, char **argv)
                if (ret < 0) {
                        goto end;
                }
+#endif
+
+               bt_ctx = bt_context_create();
+               ret = bt_context_add_traces_recursive(bt_ctx, opt_relay_hostname,
+                               "lttng-live", NULL);
+               if (ret < 0) {
+                       fprintf(stderr, "[error] Opening the trace\n");
+                       goto end;
+               }
        } else {
                //init_lttngtop();
 
@@ -1062,27 +1129,34 @@ int main(int argc, char **argv)
                        fprintf(stderr, "[error] Opening the trace\n");
                        goto end;
                }
-       }
 
-       ret = check_requirements(bt_ctx);
-       if (ret < 0) {
-               fprintf(stderr, "[error] some mandatory contexts were missing, exiting.\n");
-               goto end;
-       }
-       if (!opt_textdump) {
-               pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
-               pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
+               ret = check_requirements(bt_ctx);
+               if (ret < 0) {
+                       fprintf(stderr, "[error] some mandatory contexts "
+                                       "were missing, exiting.\n");
+                       goto end;
+               }
+
+               if (!opt_textdump) {
+                       pthread_create(&display_thread, NULL, ncurses_display,
+                                       (void *) NULL);
+                       pthread_create(&timer_thread, NULL, refresh_thread,
+                                       (void *) NULL);
+               }
+
+               iter_trace(bt_ctx);
        }
 
-       iter_trace(bt_ctx);
 
        pthread_join(display_thread, NULL);
        quit = 1;
        pthread_join(timer_thread, NULL);
 
+       ret = 0;
+
 end:
        if (bt_ctx)
                bt_context_put(bt_ctx);
 
-       return 0;
+       return ret;
 }
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