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[v6,6/7] kprobes: copy ainsn after alloc aggr kprobe

Message ID 1413977525-51480-7-git-send-email-wangnan0@huawei.com
State New
Headers show

Commit Message

Wang Nan Oct. 22, 2014, 11:32 a.m. UTC 
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@huawei.com>
---
 kernel/kprobes.c | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

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;