1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2020 Facebook */
 3#include <test_progs.h>
 
 4#include "test_subprogs.skel.h"
 5#include "test_subprogs_unused.skel.h"
 6
 7struct toggler_ctx {
 8	int fd;
 9	bool stop;
10};
11
12static void *toggle_jit_harden(void *arg)
13{
14	struct toggler_ctx *ctx = arg;
15	char two = '2';
16	char zero = '0';
17
18	while (!ctx->stop) {
19		lseek(ctx->fd, SEEK_SET, 0);
20		write(ctx->fd, &two, sizeof(two));
21		lseek(ctx->fd, SEEK_SET, 0);
22		write(ctx->fd, &zero, sizeof(zero));
23	}
24
25	return NULL;
26}
27
28static void test_subprogs_with_jit_harden_toggling(void)
29{
30	struct toggler_ctx ctx;
31	pthread_t toggler;
32	int err;
33	unsigned int i, loop = 10;
34
35	ctx.fd = open("/proc/sys/net/core/bpf_jit_harden", O_RDWR);
36	if (!ASSERT_GE(ctx.fd, 0, "open bpf_jit_harden"))
37		return;
38
39	ctx.stop = false;
40	err = pthread_create(&toggler, NULL, toggle_jit_harden, &ctx);
41	if (!ASSERT_OK(err, "new toggler"))
42		goto out;
43
44	/* Make toggler thread to run */
45	usleep(1);
46
47	for (i = 0; i < loop; i++) {
48		struct test_subprogs *skel = test_subprogs__open_and_load();
49
50		if (!ASSERT_OK_PTR(skel, "skel open"))
51			break;
52		test_subprogs__destroy(skel);
53	}
54
55	ctx.stop = true;
56	pthread_join(toggler, NULL);
57out:
58	close(ctx.fd);
59}
60
61static void test_subprogs_alone(void)
62{
63	struct test_subprogs *skel;
64	struct test_subprogs_unused *skel2;
65	int err;
66
67	skel = test_subprogs__open_and_load();
68	if (!ASSERT_OK_PTR(skel, "skel_open"))
69		return;
70
71	err = test_subprogs__attach(skel);
72	if (!ASSERT_OK(err, "skel attach"))
73		goto cleanup;
74
75	usleep(1);
76
77	ASSERT_EQ(skel->bss->res1, 12, "res1");
78	ASSERT_EQ(skel->bss->res2, 17, "res2");
79	ASSERT_EQ(skel->bss->res3, 19, "res3");
80	ASSERT_EQ(skel->bss->res4, 36, "res4");
81
82	skel2 = test_subprogs_unused__open_and_load();
83	ASSERT_OK_PTR(skel2, "unused_progs_skel");
84	test_subprogs_unused__destroy(skel2);
85
86cleanup:
87	test_subprogs__destroy(skel);
88}
89
90void test_subprogs(void)
91{
92	if (test__start_subtest("subprogs_alone"))
93		test_subprogs_alone();
94	if (test__start_subtest("subprogs_and_jit_harden"))
95		test_subprogs_with_jit_harden_toggling();
96}

 1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2020 Facebook */
 3#include <test_progs.h>
 4#include <time.h>
 5#include "test_subprogs.skel.h"
 6#include "test_subprogs_unused.skel.h"
 7
 8static int duration;
 
 
 
 9
10void test_subprogs(void)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
11{
12	struct test_subprogs *skel;
13	struct test_subprogs_unused *skel2;
14	int err;
15
16	skel = test_subprogs__open_and_load();
17	if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
18		return;
19
20	err = test_subprogs__attach(skel);
21	if (CHECK(err, "skel_attach", "failed to attach skeleton: %d\n", err))
22		goto cleanup;
23
24	usleep(1);
25
26	CHECK(skel->bss->res1 != 12, "res1", "got %d, exp %d\n", skel->bss->res1, 12);
27	CHECK(skel->bss->res2 != 17, "res2", "got %d, exp %d\n", skel->bss->res2, 17);
28	CHECK(skel->bss->res3 != 19, "res3", "got %d, exp %d\n", skel->bss->res3, 19);
29	CHECK(skel->bss->res4 != 36, "res4", "got %d, exp %d\n", skel->bss->res4, 36);
30
31	skel2 = test_subprogs_unused__open_and_load();
32	ASSERT_OK_PTR(skel2, "unused_progs_skel");
33	test_subprogs_unused__destroy(skel2);
34
35cleanup:
36	test_subprogs__destroy(skel);
 
 
 
 
 
 
 
 
37}