libbpf-tools/klockstat.c: fix delete elem bug when reset stats

chudihuang · yonghong-song · commit 69fd21891cfd · 2024-06-16T09:53:59.000-07:00
diff --git a/libbpf-tools/klockstat.c b/libbpf-tools/klockstat.c
@@ -570,8 +570,10 @@ static int print_stats(struct ksyms *ksyms, int stack_map, int stat_map)
 	}
 
 	for (i = 0; i < stat_idx; i++) {
-		if (env.reset)
+		if (env.reset) {
+			ss = stats[i];
 			bpf_map_delete_elem(stat_map, &ss->stack_id);
+		}	
 		free(stats[i]);
         }
 	free(stats);

Original file line number	Diff line number	Diff line change
`@@ -570,8 +570,10 @@ static int print_stats(struct ksyms *ksyms, int stack_map, int stat_map)`
`570`	`570`	`}`
`571`	`571`
`572`	`572`	`for (i = 0; i < stat_idx; i++) {`
`573`		`- if (env.reset)`
	`573`	`+ if (env.reset) {`
	`574`	`+ ss = stats[i];`
`574`	`575`	`bpf_map_delete_elem(stat_map, &ss->stack_id);`
	`576`	`+ }`
`575`	`577`	`free(stats[i]);`
`576`	`578`	`}`
`577`	`579`	`free(stats);`