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// SPDX-License-Identifier: GPL-2.0
/*
* User Events Dyn Events Test Program
*
* Copyright (c) 2021 Beau Belgrave <beaub@linux.microsoft.com>
*/
#include <errno.h>
#include <linux/user_events.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <unistd.h>
#include "../kselftest_harness.h"
const char *dyn_file = "/sys/kernel/tracing/dynamic_events";
const char *clear = "!u:__test_event";
static int Append(const char *value)
{
int fd = open(dyn_file, O_RDWR | O_APPEND);
int ret = write(fd, value, strlen(value));
close(fd);
return ret;
}
#define CLEAR() \
do { \
int ret = Append(clear); \
if (ret == -1) \
ASSERT_EQ(ENOENT, errno); \
} while (0)
#define TEST_PARSE(x) \
do { \
ASSERT_NE(-1, Append(x)); \
CLEAR(); \
} while (0)
#define TEST_NPARSE(x) ASSERT_EQ(-1, Append(x))
FIXTURE(user) {
};
FIXTURE_SETUP(user) {
CLEAR();
}
FIXTURE_TEARDOWN(user) {
CLEAR();
}
TEST_F(user, basic_types) {
/* All should work */
TEST_PARSE("u:__test_event u64 a");
TEST_PARSE("u:__test_event u32 a");
TEST_PARSE("u:__test_event u16 a");
TEST_PARSE("u:__test_event u8 a");
TEST_PARSE("u:__test_event char a");
TEST_PARSE("u:__test_event unsigned char a");
TEST_PARSE("u:__test_event int a");
TEST_PARSE("u:__test_event unsigned int a");
TEST_PARSE("u:__test_event short a");
TEST_PARSE("u:__test_event unsigned short a");
TEST_PARSE("u:__test_event char[20] a");
TEST_PARSE("u:__test_event unsigned char[20] a");
TEST_PARSE("u:__test_event char[0x14] a");
TEST_PARSE("u:__test_event unsigned char[0x14] a");
/* Bad size format should fail */
TEST_NPARSE("u:__test_event char[aa] a");
/* Large size should fail */
TEST_NPARSE("u:__test_event char[9999] a");
/* Long size string should fail */
TEST_NPARSE("u:__test_event char[0x0000000000001] a");
}
TEST_F(user, loc_types) {
/* All should work */
TEST_PARSE("u:__test_event __data_loc char[] a");
TEST_PARSE("u:__test_event __data_loc unsigned char[] a");
TEST_PARSE("u:__test_event __rel_loc char[] a");
TEST_PARSE("u:__test_event __rel_loc unsigned char[] a");
}
TEST_F(user, size_types) {
/* Should work */
TEST_PARSE("u:__test_event struct custom a 20");
/* Size not specified on struct should fail */
TEST_NPARSE("u:__test_event struct custom a");
/* Size specified on non-struct should fail */
TEST_NPARSE("u:__test_event char a 20");
}
TEST_F(user, flags) {
/* Should work */
TEST_PARSE("u:__test_event:BPF_ITER u32 a");
/* Forward compat */
TEST_PARSE("u:__test_event:BPF_ITER,FLAG_FUTURE u32 a");
}
TEST_F(user, matching) {
/* Register */
ASSERT_NE(-1, Append("u:__test_event struct custom a 20"));
/* Should not match */
TEST_NPARSE("!u:__test_event struct custom b");
/* Should match */
TEST_PARSE("!u:__test_event struct custom a");
/* Multi field reg */
ASSERT_NE(-1, Append("u:__test_event u32 a; u32 b"));
/* Non matching cases */
TEST_NPARSE("!u:__test_event u32 a");
TEST_NPARSE("!u:__test_event u32 b");
TEST_NPARSE("!u:__test_event u32 a; u32 ");
TEST_NPARSE("!u:__test_event u32 a; u32 a");
/* Matching case */
TEST_PARSE("!u:__test_event u32 a; u32 b");
/* Register */
ASSERT_NE(-1, Append("u:__test_event u32 a; u32 b"));
/* Ensure trailing semi-colon case */
TEST_PARSE("!u:__test_event u32 a; u32 b;");
}
int main(int argc, char **argv)
{
return test_harness_run(argc, argv);
}
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