linux-kernel - [PATCH] selftests: breakpoints: Fix wrong argument of ptrace() when single step

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Message-Id: <1612341547-22225-1-git-send-email-yangtiezhu@loongson.cn>
Date:   Wed,  3 Feb 2021 16:39:07 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Shuah Khan <shuah@...nel.org>
Cc:     linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] selftests: breakpoints: Fix wrong argument of ptrace() when single step

According to the error message, the first argument of ptrace() should be
PTRACE_SINGLESTEP instead of PTRACE_CONT when ptrace single step.

Fixes: f43365ee17f8 ("selftests: arm64: add test for unaligned/inexact watchpoint handling")
Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 tools/testing/selftests/breakpoints/breakpoint_test_arm64.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/breakpoints/breakpoint_test_arm64.c b/tools/testing/selftests/breakpoints/breakpoint_test_arm64.c
index ad41ea6..2f4d4d6 100644
--- a/tools/testing/selftests/breakpoints/breakpoint_test_arm64.c
+++ b/tools/testing/selftests/breakpoints/breakpoint_test_arm64.c
@@ -143,7 +143,7 @@ static bool run_test(int wr_size, int wp_size, int wr, int wp)
 	if (!set_watchpoint(pid, wp_size, wp))
 		return false;
 
-	if (ptrace(PTRACE_CONT, pid, NULL, NULL) < 0) {
+	if (ptrace(PTRACE_SINGLESTEP, pid, NULL, NULL) < 0) {
 		ksft_print_msg(
 			"ptrace(PTRACE_SINGLESTEP) failed: %s\n",
 			strerror(errno));
-- 
2.1.0