[PATCH v8 1/2] kprobes: copy ainsn after alloc aggr kprobe

[Wang Nan]

Copy old kprobe to newly alloced optimized_kprobe before
arch_prepare_optimized_kprobe(). Original kprove can brings more
information to optimizer.

v1 -> v2:
 -  Bugfix: copy p->addr when alloc_aggr_kprobe.

Signed-off-by: Wang Nan <wangnan0 at huawei.com>
---
 kernel/kprobes.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 3995f54..e9868ec 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -730,7 +730,13 @@ static struct kprobe *alloc_aggr_kprobe(struct kprobe *p)
 		return NULL;
 
 	INIT_LIST_HEAD(&op->list);
+
+	/*
+	 * copy gives arch_prepare_optimized_kprobe
+	 * more information
+	 */
 	op->kp.addr = p->addr;
+	copy_kprobe(p, &op->kp);
 	arch_prepare_optimized_kprobe(op);
 
 	return &op->kp;
-- 
1.8.4