c/profile: Short circuit on errors

Report proper errors when symbolization fails and bail out early. Signed-off-by: Daniel Müller <deso@posteo.net>
libbpf · Jul 24, 2024 · 00c99c0 · 00c99c0
1 parent ceb0dc3
commit 00c99c0
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/examples/c/profile.c b/examples/c/profile.c
@@ -80,6 +80,10 @@ static void show_stack_trace(__u64 *stack, int stack_sz, pid_t pid)
 		result = blaze_symbolize_kernel_abs_addrs(symbolizer, &src, (const uintptr_t *)stack, stack_sz);
 	}
 
+	if (result == NULL) {
+		printf("  failed to symbolize addresses: %s\n", blaze_err_str(blaze_err_last()));
+		return;
+	}
 
 	for (i = 0; i < stack_sz; i++) {
 		if (!result || result->cnt <= i || result->syms[i].name == NULL) {