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Subject[PATCH 1/3] tracing/ksym_tracer: fix the output of ksym tracer
Fix the output format of ksym tracer, make it properly aligned

Befor patch:
# tracer: ksym_tracer
#
# TASK-PID CPU# Symbol Type Function
# | | | | |
bash 1378 1 ksym_tracer_mutex W mutex_lock+0x11/0x27
bash 1378 1 ksym_filter_head W process_new_ksym_entry+0xd2/0x10c
bash 1378 1 ksym_tracer_mutex W mutex_unlock+0x12/0x1b
cat 1429 0 ksym_tracer_mutex W mutex_lock+0x11/0x27

After patch:
# tracer: ksym_tracer
#
# TASK-PID CPU# Symbol Type Function
# | | | | |
cat-1423 [000] ksym_tracer_mutex RW mutex_lock+0x11/0x27
cat-1423 [000] ksym_filter_head RW ksym_trace_filter_read+0x6e/0x10d
cat-1423 [000] ksym_tracer_mutex RW mutex_unlock+0x12/0x1b
cat-1423 [000] ksym_tracer_mutex RW mutex_lock+0x11/0x27
cat-1423 [000] ksym_filter_head RW ksym_trace_filter_read+0x6e/0x10d
cat-1423 [000] ksym_tracer_mutex RW mutex_unlock+0x12/0x1b

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
---
kernel/trace/trace_ksym.c | 13 ++++++-------
1 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/kernel/trace/trace_ksym.c b/kernel/trace/trace_ksym.c
index 1256a6e..fbf3a8e 100644
--- a/kernel/trace/trace_ksym.c
+++ b/kernel/trace/trace_ksym.c
@@ -370,13 +370,12 @@ static int ksym_trace_init(struct trace_array *tr)

static void ksym_trace_print_header(struct seq_file *m)
{
-
seq_puts(m,
- "# TASK-PID CPU# Symbol Type "
- "Function \n");
+ "# TASK-PID CPU# Symbol "
+ "Type Function\n");
seq_puts(m,
- "# | | | | "
- "| \n");
+ "# | | | "
+ " | |\n");
}

static enum print_line_t ksym_trace_output(struct trace_iterator *iter)
@@ -392,7 +391,7 @@ static enum print_line_t ksym_trace_output(struct trace_iterator *iter)

trace_assign_type(field, entry);

- ret = trace_seq_printf(s, "%-15s %-5d %-3d %-20s ", field->cmd,
+ ret = trace_seq_printf(s, "%11s-%-5d [%03d] %-30s ", field->cmd,
entry->pid, iter->cpu, field->ksym_name);
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;
@@ -412,7 +411,7 @@ static enum print_line_t ksym_trace_output(struct trace_iterator *iter)
return TRACE_TYPE_PARTIAL_LINE;

sprint_symbol(str, field->ip);
- ret = trace_seq_printf(s, "%-20s\n", str);
+ ret = trace_seq_printf(s, "%s\n", str);
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;

--
1.6.1.2



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