* [PATCH v5 6/6] trace-cmd library: Set the correct file state when reading file with no ftrace printk data
@ 2021-11-11 15:06 Tzvetomir Stoyanov (VMware)
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From: Tzvetomir Stoyanov (VMware) @ 2021-11-11 15:06 UTC (permalink / raw)
To: rostedt; +Cc: linux-trace-devel
The ftrace printk section of the trace file can contain no data, this is
valid use case. When such file is read and parsed by read_ftrace_printk,
the file state should be set to TRACECMD_FILE_PRINTK in that case.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
lib/trace-cmd/trace-input.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c
index f02d7e31..31e5e674 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -783,8 +783,10 @@ static int read_ftrace_printk(struct tracecmd_input *handle)
if (read4(handle, &size) < 0)
return -1;
- if (!size)
+ if (!size) {
+ handle->file_state = TRACECMD_FILE_PRINTK;
return 0; /* OK? */
+ }
buf = malloc(size + 1);
if (!buf)
--
2.33.1
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2021-11-11 15:06 [PATCH v5 6/6] trace-cmd library: Set the correct file state when reading file with no ftrace printk data Tzvetomir Stoyanov (VMware)
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