Commit-ID: 1ec7c4849c214fc78b023230264399836ea3b245
Gitweb: http://git.kernel.org/tip/1ec7c4849c214fc78b023230264399836ea3b245
Author: Steven Rostedt <srostedt@xxxxxxxxxx>
AuthorDate: Thu, 14 May 2009 23:40:06 -0400
Committer: Steven Rostedt <rostedt@xxxxxxxxxxx>
CommitDate: Thu, 14 May 2009 23:40:06 -0400
tracing: stop stack trace on first empty entry
The stack tracer stores eight entries in the ring buffer when an event
traces the stack. The output outputs all eight entries regardless of
how many entries were recorded.
This patch breaks out of the loop when a null entry is discovered.
[ Impact: only print the stack that is recorded ]
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
kernel/trace/trace_output.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 8bd9a2c..489c0e8 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -898,6 +898,8 @@ static enum print_line_t trace_stack_print(struct trace_iterator *iter,
trace_assign_type(field, iter->ent);
for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
+ if (!field->caller[i])
+ break;
if (i) {
if (!trace_seq_puts(s, " <= "))
goto partial;
--
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