1 files changed, 48 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/signal_pending.c b/tools/testing/selftests/bpf/prog_tests/signal_pending.c
new file mode 100644
index 000000000000..f2a37bbf91ab
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/signal_pending.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <test_progs.h>
+
+static void sigalrm_handler(int s) {}
+static struct sigaction sigalrm_action = {
+	.sa_handler = sigalrm_handler,
+};
+
+static void test_signal_pending_by_type(enum bpf_prog_type prog_type)
+{
+	struct bpf_insn prog[4096];
+	struct itimerval timeo = {
+		.it_value.tv_usec = 100000, /* 100ms */
+	};
+	__u32 duration, retval;
+	int prog_fd;
+	int err;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(prog); i++)
+		prog[i] = BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0);
+	prog[ARRAY_SIZE(prog) - 1] = BPF_EXIT_INSN();
+
+	prog_fd = bpf_load_program(prog_type, prog, ARRAY_SIZE(prog),
+				   "GPL", 0, NULL, 0);
+	CHECK(prog_fd < 0, "test-run", "errno %d\n", errno);
+
+	err = sigaction(SIGALRM, &sigalrm_action, NULL);
+	CHECK(err, "test-run-signal-sigaction", "errno %d\n", errno);
+
+	err = setitimer(ITIMER_REAL, &timeo, NULL);
+	CHECK(err, "test-run-signal-timer", "errno %d\n", errno);
+
+	err = bpf_prog_test_run(prog_fd, 0xffffffff, &pkt_v4, sizeof(pkt_v4),
+				NULL, NULL, &retval, &duration);
+	CHECK(duration > 500000000, /* 500ms */
+	      "test-run-signal-duration",
+	      "duration %dns > 500ms\n",
+	      duration);
+
+	signal(SIGALRM, SIG_DFL);
+}
+
+void test_signal_pending(enum bpf_prog_type prog_type)
+{
+	test_signal_pending_by_type(BPF_PROG_TYPE_SOCKET_FILTER);
+	test_signal_pending_by_type(BPF_PROG_TYPE_FLOW_DISSECTOR);
+}