[PULL 6/9] tests/tcg/linux-test: Check that sigaction can query SIGKILL/SIGSTOP

[Laurent Vivier <laurent@vivier.eu>]

From: Ilya Leoshkevich <iii@linux.ibm.com>

Verify that querying is allowed, but making changes isn't.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20210601145600.3131040-3-iii@linux.ibm.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 tests/tcg/multiarch/linux-test.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tests/tcg/multiarch/linux-test.c b/tests/tcg/multiarch/linux-test.c
index 96bbad582318..c8c6aeddeb36 100644
--- a/tests/tcg/multiarch/linux-test.c
+++ b/tests/tcg/multiarch/linux-test.c
@@ -496,6 +496,15 @@ static void test_signal(void)
     sigemptyset(&act.sa_mask);
     act.sa_flags = 0;
     chk_error(sigaction(SIGSEGV, &act, NULL));
+
+    if (sigaction(SIGKILL, &act, NULL) == 0) {
+        error("sigaction(SIGKILL, &act, NULL) must not succeed");
+    }
+    if (sigaction(SIGSTOP, &act, NULL) == 0) {
+        error("sigaction(SIGSTOP, &act, NULL) must not succeed");
+    }
+    chk_error(sigaction(SIGKILL, NULL, &act));
+    chk_error(sigaction(SIGSTOP, NULL, &act));
 }
 
 #define SHM_SIZE 32768
-- 
2.31.1