tracepoint: Print the function symbol when tracepoint_debug is set

HuangShijie2024 · rostedt · commit 30c94bbceeda · 2025-03-21T15:30:10.000-04:00
When tracepoint_debug is set, we may get the output in kernel log: [ 380.013843] Probe 0 : 00000000f0d68cda It is not readable, so change to print the function symbol. After this patch, the output may becomes: [ 55.225555] Probe 0 : perf_trace_sched_wakeup_template+0x0/0x20 Link: https://lore.kernel.org/20250307033858.4134-1-shijie@os.amperecomputing.com Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
@@ -127,7 +127,7 @@ static void debug_print_probes(struct tracepoint_func *funcs)
 		return;
 
 	for (i = 0; funcs[i].func; i++)
-		printk(KERN_DEBUG "Probe %d : %p\n", i, funcs[i].func);
+		printk(KERN_DEBUG "Probe %d : %pSb\n", i, funcs[i].func);
 }
 
 static struct tracepoint_func *

Original file line number	Diff line number	Diff line change
`@@ -127,7 +127,7 @@ static void debug_print_probes(struct tracepoint_func *funcs)`
`127`	`127`	`return;`
`128`	`128`
`129`	`129`	`for (i = 0; funcs[i].func; i++)`
`130`		`- printk(KERN_DEBUG "Probe %d : %p\n", i, funcs[i].func);`
	`130`	`+ printk(KERN_DEBUG "Probe %d : %pSb\n", i, funcs[i].func);`
`131`	`131`	`}`
`132`	`132`
`133`	`133`	`static struct tracepoint_func *`