From d205d4af3a5ee840edecfa5f6b389d7d03b0786d Mon Sep 17 00:00:00 2001
From: Rong Tao <rongtao@cestc.cn>
Date: Tue, 27 Aug 2024 12:30:30 +0800
Subject: [PATCH] samples/bpf: tracex4: Fix failed to create kretprobe
'kmem_cache_alloc_node+0x0'
commit 7bd230a26648 ("mm/slab: enable slab allocation tagging for kmalloc
and friends") [1] swap kmem_cache_alloc_node() to
kmem_cache_alloc_node_noprof().
linux/samples/bpf$ sudo ./tracex4
libbpf: prog 'bpf_prog2': failed to create kretprobe
'kmem_cache_alloc_node+0x0' perf event: No such file or directory
ERROR: bpf_program__attach failed
Signed-off-by: Rong Tao <rongtao@cestc.cn>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://github.com/torvalds/linux/commit/7bd230a26648ac68ab3731ebbc449090f0ac6a37
Link: https://lore.kernel.org/bpf/tencent_34E5BCCAC5ABF3E81222AD81B1D05F16DE06@qq.com
---
samples/bpf/tracex4.bpf.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/samples/bpf/tracex4.bpf.c b/samples/bpf/tracex4.bpf.c
index ca826750901ae..d786492fd926f 100644
--- a/samples/bpf/tracex4.bpf.c
+++ b/samples/bpf/tracex4.bpf.c
@@ -33,13 +33,13 @@ int bpf_prog1(struct pt_regs *ctx)
return 0;
}
-SEC("kretprobe/kmem_cache_alloc_node")
+SEC("kretprobe/kmem_cache_alloc_node_noprof")
int bpf_prog2(struct pt_regs *ctx)
{
long ptr = PT_REGS_RC(ctx);
long ip = 0;
- /* get ip address of kmem_cache_alloc_node() caller */
+ /* get ip address of kmem_cache_alloc_node_noprof() caller */
BPF_KRETPROBE_READ_RET_IP(ip, ctx);
struct pair v = {
--
GitLab