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Message-Id: <1385533203-10014-7-git-send-email-namhyung@kernel.org>
Date: Wed, 27 Nov 2013 15:19:52 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>,
Oleg Nesterov <oleg@...hat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
Hyeoncheol Lee <cheol.lee@....com>,
Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>,
Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
Hemant Kumar <hkshaw@...ux.vnet.ibm.com>,
LKML <linux-kernel@...r.kernel.org>,
Namhyung Kim <namhyung.kim@....com>
Subject: [PATCH 06/17] tracing/probes: Integrate duplicate set_print_fmt()
From: Namhyung Kim <namhyung.kim@....com>
The set_print_fmt() functions are implemented almost same for
[ku]probes. Move it to a common place and get rid of the duplication.
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: zhangwei(Jovi) <jovi.zhangwei@...wei.com>
Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
kernel/trace/trace_kprobe.c | 63 +--------------------------------------------
kernel/trace/trace_probe.c | 62 ++++++++++++++++++++++++++++++++++++++++++++
kernel/trace/trace_probe.h | 2 ++
kernel/trace/trace_uprobe.c | 55 +--------------------------------------
4 files changed, 66 insertions(+), 116 deletions(-)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index bc85240a8e43..a8129dfa36bb 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -964,67 +964,6 @@ static int kretprobe_event_define_fields(struct ftrace_event_call *event_call)
return 0;
}
-static int __set_print_fmt(struct trace_kprobe *tp, char *buf, int len)
-{
- int i;
- int pos = 0;
-
- const char *fmt, *arg;
-
- if (!trace_kprobe_is_return(tp)) {
- fmt = "(%lx)";
- arg = "REC->" FIELD_STRING_IP;
- } else {
- fmt = "(%lx <- %lx)";
- arg = "REC->" FIELD_STRING_FUNC ", REC->" FIELD_STRING_RETIP;
- }
-
- /* When len=0, we just calculate the needed length */
-#define LEN_OR_ZERO (len ? len - pos : 0)
-
- pos += snprintf(buf + pos, LEN_OR_ZERO, "\"%s", fmt);
-
- for (i = 0; i < tp->p.nr_args; i++) {
- pos += snprintf(buf + pos, LEN_OR_ZERO, " %s=%s",
- tp->p.args[i].name, tp->p.args[i].type->fmt);
- }
-
- pos += snprintf(buf + pos, LEN_OR_ZERO, "\", %s", arg);
-
- for (i = 0; i < tp->p.nr_args; i++) {
- if (strcmp(tp->p.args[i].type->name, "string") == 0)
- pos += snprintf(buf + pos, LEN_OR_ZERO,
- ", __get_str(%s)",
- tp->p.args[i].name);
- else
- pos += snprintf(buf + pos, LEN_OR_ZERO, ", REC->%s",
- tp->p.args[i].name);
- }
-
-#undef LEN_OR_ZERO
-
- /* return the length of print_fmt */
- return pos;
-}
-
-static int set_print_fmt(struct trace_kprobe *tp)
-{
- int len;
- char *print_fmt;
-
- /* First: called with 0 length to calculate the needed length */
- len = __set_print_fmt(tp, NULL, 0);
- print_fmt = kmalloc(len + 1, GFP_KERNEL);
- if (!print_fmt)
- return -ENOMEM;
-
- /* Second: actually write the @print_fmt */
- __set_print_fmt(tp, print_fmt, len + 1);
- tp->p.call.print_fmt = print_fmt;
-
- return 0;
-}
-
#ifdef CONFIG_PERF_EVENTS
/* Kprobe profile handler */
@@ -1175,7 +1114,7 @@ static int register_kprobe_event(struct trace_kprobe *tp)
call->event.funcs = &kprobe_funcs;
call->class->define_fields = kprobe_event_define_fields;
}
- if (set_print_fmt(tp) < 0)
+ if (set_print_fmt(&tp->p, trace_kprobe_is_return(tp)) < 0)
return -ENOMEM;
ret = register_ftrace_event(&call->event);
if (!ret) {
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index e1b975fb5d7c..7de2f58d2acb 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -837,3 +837,65 @@ out:
return ret;
}
+
+static int __set_print_fmt(struct trace_probe *tp, char *buf, int len,
+ bool is_return)
+{
+ int i;
+ int pos = 0;
+
+ const char *fmt, *arg;
+
+ if (!is_return) {
+ fmt = "(%lx)";
+ arg = "REC->" FIELD_STRING_IP;
+ } else {
+ fmt = "(%lx <- %lx)";
+ arg = "REC->" FIELD_STRING_FUNC ", REC->" FIELD_STRING_RETIP;
+ }
+
+ /* When len=0, we just calculate the needed length */
+#define LEN_OR_ZERO (len ? len - pos : 0)
+
+ pos += snprintf(buf + pos, LEN_OR_ZERO, "\"%s", fmt);
+
+ for (i = 0; i < tp->nr_args; i++) {
+ pos += snprintf(buf + pos, LEN_OR_ZERO, " %s=%s",
+ tp->args[i].name, tp->args[i].type->fmt);
+ }
+
+ pos += snprintf(buf + pos, LEN_OR_ZERO, "\", %s", arg);
+
+ for (i = 0; i < tp->nr_args; i++) {
+ if (strcmp(tp->args[i].type->name, "string") == 0)
+ pos += snprintf(buf + pos, LEN_OR_ZERO,
+ ", __get_str(%s)",
+ tp->args[i].name);
+ else
+ pos += snprintf(buf + pos, LEN_OR_ZERO, ", REC->%s",
+ tp->args[i].name);
+ }
+
+#undef LEN_OR_ZERO
+
+ /* return the length of print_fmt */
+ return pos;
+}
+
+int set_print_fmt(struct trace_probe *tp, bool is_return)
+{
+ int len;
+ char *print_fmt;
+
+ /* First: called with 0 length to calculate the needed length */
+ len = __set_print_fmt(tp, NULL, 0, is_return);
+ print_fmt = kmalloc(len + 1, GFP_KERNEL);
+ if (!print_fmt)
+ return -ENOMEM;
+
+ /* Second: actually write the @print_fmt */
+ __set_print_fmt(tp, print_fmt, len + 1, is_return);
+ tp->call.print_fmt = print_fmt;
+
+ return 0;
+}
diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h
index d384fbd4025c..2c979cb66367 100644
--- a/kernel/trace/trace_probe.h
+++ b/kernel/trace/trace_probe.h
@@ -226,3 +226,5 @@ store_trace_args(int ent_size, struct trace_probe *tp, struct pt_regs *regs,
data + tp->args[i].offset);
}
}
+
+extern int set_print_fmt(struct trace_probe *tp, bool is_return);
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index 3b2885ef47c9..0711f7b2dae5 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -682,59 +682,6 @@ static int uprobe_event_define_fields(struct ftrace_event_call *event_call)
return 0;
}
-#define LEN_OR_ZERO (len ? len - pos : 0)
-static int __set_print_fmt(struct trace_uprobe *tu, char *buf, int len)
-{
- const char *fmt, *arg;
- int i;
- int pos = 0;
-
- if (is_ret_probe(tu)) {
- fmt = "(%lx <- %lx)";
- arg = "REC->" FIELD_STRING_FUNC ", REC->" FIELD_STRING_RETIP;
- } else {
- fmt = "(%lx)";
- arg = "REC->" FIELD_STRING_IP;
- }
-
- /* When len=0, we just calculate the needed length */
-
- pos += snprintf(buf + pos, LEN_OR_ZERO, "\"%s", fmt);
-
- for (i = 0; i < tu->p.nr_args; i++) {
- pos += snprintf(buf + pos, LEN_OR_ZERO, " %s=%s",
- tu->p.args[i].name, tu->p.args[i].type->fmt);
- }
-
- pos += snprintf(buf + pos, LEN_OR_ZERO, "\", %s", arg);
-
- for (i = 0; i < tu->p.nr_args; i++) {
- pos += snprintf(buf + pos, LEN_OR_ZERO, ", REC->%s",
- tu->p.args[i].name);
- }
-
- return pos; /* return the length of print_fmt */
-}
-#undef LEN_OR_ZERO
-
-static int set_print_fmt(struct trace_uprobe *tu)
-{
- char *print_fmt;
- int len;
-
- /* First: called with 0 length to calculate the needed length */
- len = __set_print_fmt(tu, NULL, 0);
- print_fmt = kmalloc(len + 1, GFP_KERNEL);
- if (!print_fmt)
- return -ENOMEM;
-
- /* Second: actually write the @print_fmt */
- __set_print_fmt(tu, print_fmt, len + 1);
- tu->p.call.print_fmt = print_fmt;
-
- return 0;
-}
-
#ifdef CONFIG_PERF_EVENTS
static bool
__uprobe_perf_filter(struct trace_uprobe_filter *filter, struct mm_struct *mm)
@@ -966,7 +913,7 @@ static int register_uprobe_event(struct trace_uprobe *tu)
call->event.funcs = &uprobe_funcs;
call->class->define_fields = uprobe_event_define_fields;
- if (set_print_fmt(tu) < 0)
+ if (set_print_fmt(&tu->p, is_ret_probe(tu)) < 0)
return -ENOMEM;
ret = register_ftrace_event(&call->event);
--
1.7.11.7
--
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