149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (C) 2021. Huawei Technologies Co., Ltd */
|
|
#include <test_progs.h>
|
|
#include "strncmp_test.skel.h"
|
|
|
|
static int trigger_strncmp(const struct strncmp_test *skel)
|
|
{
|
|
int cmp;
|
|
|
|
usleep(1);
|
|
|
|
cmp = skel->bss->cmp_ret;
|
|
if (cmp > 0)
|
|
return 1;
|
|
if (cmp < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Compare str and target after making str[i] != target[i].
|
|
* When exp is -1, make str[i] < target[i] and delta = -1.
|
|
*/
|
|
static void strncmp_full_str_cmp(struct strncmp_test *skel, const char *name,
|
|
int exp)
|
|
{
|
|
size_t nr = sizeof(skel->bss->str);
|
|
char *str = skel->bss->str;
|
|
int delta = exp;
|
|
int got;
|
|
size_t i;
|
|
|
|
memcpy(str, skel->rodata->target, nr);
|
|
for (i = 0; i < nr - 1; i++) {
|
|
str[i] += delta;
|
|
|
|
got = trigger_strncmp(skel);
|
|
ASSERT_EQ(got, exp, name);
|
|
|
|
str[i] -= delta;
|
|
}
|
|
}
|
|
|
|
static void test_strncmp_ret(void)
|
|
{
|
|
struct strncmp_test *skel;
|
|
int err, got;
|
|
|
|
skel = strncmp_test__open();
|
|
if (!ASSERT_OK_PTR(skel, "strncmp_test open"))
|
|
return;
|
|
|
|
bpf_program__set_autoload(skel->progs.do_strncmp, true);
|
|
|
|
err = strncmp_test__load(skel);
|
|
if (!ASSERT_EQ(err, 0, "strncmp_test load"))
|
|
goto out;
|
|
|
|
err = strncmp_test__attach(skel);
|
|
if (!ASSERT_EQ(err, 0, "strncmp_test attach"))
|
|
goto out;
|
|
|
|
skel->bss->target_pid = getpid();
|
|
|
|
/* Empty str */
|
|
skel->bss->str[0] = '\0';
|
|
got = trigger_strncmp(skel);
|
|
ASSERT_EQ(got, -1, "strncmp: empty str");
|
|
|
|
/* Same string */
|
|
memcpy(skel->bss->str, skel->rodata->target, sizeof(skel->bss->str));
|
|
got = trigger_strncmp(skel);
|
|
ASSERT_EQ(got, 0, "strncmp: same str");
|
|
|
|
/* Not-null-termainted string */
|
|
memcpy(skel->bss->str, skel->rodata->target, sizeof(skel->bss->str));
|
|
skel->bss->str[sizeof(skel->bss->str) - 1] = 'A';
|
|
got = trigger_strncmp(skel);
|
|
ASSERT_EQ(got, 1, "strncmp: not-null-term str");
|
|
|
|
strncmp_full_str_cmp(skel, "strncmp: less than", -1);
|
|
strncmp_full_str_cmp(skel, "strncmp: greater than", 1);
|
|
out:
|
|
strncmp_test__destroy(skel);
|
|
}
|
|
|
|
static void test_strncmp_bad_not_const_str_size(void)
|
|
{
|
|
struct strncmp_test *skel;
|
|
int err;
|
|
|
|
skel = strncmp_test__open();
|
|
if (!ASSERT_OK_PTR(skel, "strncmp_test open"))
|
|
return;
|
|
|
|
bpf_program__set_autoload(skel->progs.strncmp_bad_not_const_str_size, true);
|
|
|
|
err = strncmp_test__load(skel);
|
|
ASSERT_ERR(err, "strncmp_test load bad_not_const_str_size");
|
|
|
|
strncmp_test__destroy(skel);
|
|
}
|
|
|
|
static void test_strncmp_bad_writable_target(void)
|
|
{
|
|
struct strncmp_test *skel;
|
|
int err;
|
|
|
|
skel = strncmp_test__open();
|
|
if (!ASSERT_OK_PTR(skel, "strncmp_test open"))
|
|
return;
|
|
|
|
bpf_program__set_autoload(skel->progs.strncmp_bad_writable_target, true);
|
|
|
|
err = strncmp_test__load(skel);
|
|
ASSERT_ERR(err, "strncmp_test load bad_writable_target");
|
|
|
|
strncmp_test__destroy(skel);
|
|
}
|
|
|
|
static void test_strncmp_bad_not_null_term_target(void)
|
|
{
|
|
struct strncmp_test *skel;
|
|
int err;
|
|
|
|
skel = strncmp_test__open();
|
|
if (!ASSERT_OK_PTR(skel, "strncmp_test open"))
|
|
return;
|
|
|
|
bpf_program__set_autoload(skel->progs.strncmp_bad_not_null_term_target, true);
|
|
|
|
err = strncmp_test__load(skel);
|
|
ASSERT_ERR(err, "strncmp_test load bad_not_null_term_target");
|
|
|
|
strncmp_test__destroy(skel);
|
|
}
|
|
|
|
void test_test_strncmp(void)
|
|
{
|
|
if (test__start_subtest("strncmp_ret"))
|
|
test_strncmp_ret();
|
|
if (test__start_subtest("strncmp_bad_not_const_str_size"))
|
|
test_strncmp_bad_not_const_str_size();
|
|
if (test__start_subtest("strncmp_bad_writable_target"))
|
|
test_strncmp_bad_writable_target();
|
|
if (test__start_subtest("strncmp_bad_not_null_term_target"))
|
|
test_strncmp_bad_not_null_term_target();
|
|
}
|