From: Julien Desfossez <jdesfossez@efficios.com>
Date: Fri, 7 Feb 2014 22:36:43 +0000 (-0500)
Subject: print syscall origin on exit_syscall
X-Git-Tag: v0.3~51
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=1d74c4d1c6aaa6bcad2f2d4b02e720c0a318584d;p=lttngtop.git

print syscall origin on exit_syscall

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
---

diff --git a/src/lttngtop.c b/src/lttngtop.c
index f85d11e..e9f240b 100644
--- a/src/lttngtop.c
+++ b/src/lttngtop.c
@@ -220,6 +220,8 @@ enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_dat
 	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);
 
@@ -265,6 +267,30 @@ enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_dat
 
 	cpu_id = get_cpu_id(call_data);
 	procname = get_context_comm(call_data);
+	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;
@@ -278,7 +304,9 @@ enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_dat
 			(hostname) ? " ": "", cpu_id, procname, pid, tid,
 			bt_ctf_event_name(call_data));
 	print_fields(call_data);
-	printf(")\n");
+	printf(")%s", (from_syscall) ? from_syscall : "\n");
+
+	free(from_syscall);
 
 end:
 	return BT_CB_OK;
diff --git a/src/lttngtoptypes.h b/src/lttngtoptypes.h
index 382fad5..15b8614 100644
--- a/src/lttngtoptypes.h
+++ b/src/lttngtoptypes.h
@@ -79,6 +79,7 @@ struct cputime {
 	struct processtop *current_task;
 	unsigned long task_start;
 	GHashTable *perf;
+	struct syscall *current_syscall;
 };
 
 /*
@@ -152,6 +153,11 @@ struct vmas {
 	unsigned long page_faults;
 };
 
+struct syscall {
+	char *name;
+	unsigned long ts_start;
+};
+
 struct syscalls {
 	unsigned int id;
 	unsigned long count;