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[bpf-next,1/2] samples: bpf: replace symbol compare of trace_event

Message ID 20191123055151.9990-2-danieltimlee@gmail.com
State Changes Requested
Delegated to: BPF Maintainers
Headers show
Series Fix broken samples due to symbol mismatch | expand

Commit Message

Daniel T. Lee Nov. 23, 2019, 5:51 a.m. UTC 
Previously, when this sample is added, commit 1c47910ef8013
("samples/bpf: add perf_event+bpf example"), a symbol 'sys_read' and
'sys_write' has been used without no prefixes. But currently there are
no exact symbols with these under kallsyms and this leads to failure.

This commit changes exact compare to substring compare to keep compatible
with exact symbol or prefixed symbol.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
---
 samples/bpf/trace_event_user.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/samples/bpf/trace_event_user.c b/samples/bpf/trace_event_user.c
index 16a16eadd509..749a50f2f9f3 100644
--- a/samples/bpf/trace_event_user.c
+++ b/samples/bpf/trace_event_user.c
@@ -37,9 +37,9 @@  static void print_ksym(__u64 addr)
 	}
 
 	printf("%s;", sym->name);
-	if (!strcmp(sym->name, "sys_read"))
+	if (!strstr(sym->name, "sys_read"))
 		sys_read_seen = true;
-	else if (!strcmp(sym->name, "sys_write"))
+	else if (!strstr(sym->name, "sys_write"))
 		sys_write_seen = true;
 }