[PATCH 3/3] trace_kprobes: don't output zero offset

Lai Jiangshan
2009-11-25T08:33:38Z

"symbol_name+0" is not so friendly.
It makes the output longer.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
---
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 9e42f2a..e82bea3 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -243,7 +243,11 @@ static int probe_arg_string(char *buf, size_t n, struct fetch_func *ff)
ret = snprintf(buf, n, "@0x%p", ff->data);
else if (ff->func == fetch_symbol) {
struct symbol_cache *sc = ff->data;
- ret = snprintf(buf, n, "@%s%+ld", sc->symbol, sc->offset);
+ if (sc->offset)
+ ret = snprintf(buf, n, "@%s%+ld", sc->symbol,
+ sc->offset);
+ else
+ ret = snprintf(buf, n, "@%s", sc->symbol);
} else if (ff->func == fetch_retvalue)
ret = snprintf(buf, n, "$retval");
else if (ff->func == fetch_stack_address)
@@ -760,10 +764,12 @@ static int probes_seq_show(struct seq_file *m, void *v)
seq_printf(m, "%c", probe_is_return(tp) ? 'r' : 'p');
seq_printf(m, ":%s/%s", tp->call.system, tp->call.name);

- if (tp->symbol)
+ if (!tp->symbol)
+ seq_printf(m, " 0x%p", tp->rp.kp.addr);
+ else if (tp->rp.kp.offset)
seq_printf(m, " %s+%u", probe_symbol(tp), tp->rp.kp.offset);
else
- seq_printf(m, " 0x%p", tp->rp.kp.addr);
+ seq_printf(m, " %s", probe_symbol(tp));

for (i = 0; i < tp->nr_args; i++) {
ret = probe_arg_string(buf, MAX_ARGSTR_LEN, &tp->args[i].fetch);