Commit-ID: 4ee5a52ed6301d0afa56cc995ef2c3795f45e801
Gitweb: http://git.kernel.org/tip/4ee5a52ed6301d0afa56cc995ef2c3795f45e801
Author: Oleg Nesterov <oleg@xxxxxxxxxx>
AuthorDate: Sat, 30 Mar 2013 20:28:15 +0100
Committer: Oleg Nesterov <oleg@xxxxxxxxxx>
CommitDate: Sat, 13 Apr 2013 15:32:03 +0200
uprobes/tracing: Change create_trace_uprobe() to support uretprobes
Finally change create_trace_uprobe() to check if argv[0][0] == 'r'
and pass the correct "is_ret" to alloc_trace_uprobe().
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Acked-by: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
Tested-by: Anton Arapov <anton@xxxxxxxxxx>
---
kernel/trace/trace_uprobe.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index 8c9f489..2d08bea 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -201,7 +201,7 @@ end:
/*
* Argument syntax:
- * - Add uprobe: p[:[GRP/]EVENT] PATH:SYMBOL[+offs] [FETCHARGS]
+ * - Add uprobe: p|r[:[GRP/]EVENT] PATH:SYMBOL [FETCHARGS]
*
* - Remove uprobe: -:[GRP/]EVENT
*/
@@ -213,20 +213,23 @@ static int create_trace_uprobe(int argc, char **argv)
char buf[MAX_EVENT_NAME_LEN];
struct path path;
unsigned long offset;
- bool is_delete;
+ bool is_delete, is_return;
int i, ret;
inode = NULL;
ret = 0;
is_delete = false;
+ is_return = false;
event = NULL;
group = NULL;
/* argc must be >= 1 */
if (argv[0][0] == '-')
is_delete = true;
+ else if (argv[0][0] == 'r')
+ is_return = true;
else if (argv[0][0] != 'p') {
- pr_info("Probe definition must be started with 'p' or '-'.\n");
+ pr_info("Probe definition must be started with 'p', 'r' or '-'.\n");
return -EINVAL;
}
@@ -324,7 +327,7 @@ static int create_trace_uprobe(int argc, char **argv)
kfree(tail);
}
- tu = alloc_trace_uprobe(group, event, argc, false);
+ tu = alloc_trace_uprobe(group, event, argc, is_return);
if (IS_ERR(tu)) {
pr_info("Failed to allocate trace_uprobe.(%d)\n", (int)PTR_ERR(tu));
ret = PTR_ERR(tu);
--
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