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// SPDX-License-Identifier: GPL-2.0
/*
* vdso_full_test.c: Sample code to test all the timers.
* Copyright (c) 2019 Arm Ltd.
*
* Compile with:
* gcc -std=gnu99 vdso_full_test.c parse_vdso.c
*
*/
#include <stdint.h>
#include <elf.h>
#include <stdio.h>
#include <time.h>
#include <sys/auxv.h>
#include <sys/time.h>
#define _GNU_SOURCE
#include <unistd.h>
#include <sys/syscall.h>
#include "../kselftest.h"
#include "vdso_config.h"
extern void *vdso_sym(const char *version, const char *name);
extern void vdso_init_from_sysinfo_ehdr(uintptr_t base);
extern void vdso_init_from_auxv(void *auxv);
static const char *version;
static const char **name;
typedef long (*vdso_gettimeofday_t)(struct timeval *tv, struct timezone *tz);
typedef long (*vdso_clock_gettime_t)(clockid_t clk_id, struct timespec *ts);
typedef long (*vdso_clock_getres_t)(clockid_t clk_id, struct timespec *ts);
typedef time_t (*vdso_time_t)(time_t *t);
const char *vdso_clock_name[12] = {
"CLOCK_REALTIME",
"CLOCK_MONOTONIC",
"CLOCK_PROCESS_CPUTIME_ID",
"CLOCK_THREAD_CPUTIME_ID",
"CLOCK_MONOTONIC_RAW",
"CLOCK_REALTIME_COARSE",
"CLOCK_MONOTONIC_COARSE",
"CLOCK_BOOTTIME",
"CLOCK_REALTIME_ALARM",
"CLOCK_BOOTTIME_ALARM",
"CLOCK_SGI_CYCLE",
"CLOCK_TAI",
};
static void vdso_test_gettimeofday(void)
{
/* Find gettimeofday. */
vdso_gettimeofday_t vdso_gettimeofday =
(vdso_gettimeofday_t)vdso_sym(version, name[0]);
if (!vdso_gettimeofday) {
ksft_print_msg("Couldn't find %s\n", name[0]);
ksft_test_result_skip("%s\n", name[0]);
return;
}
struct timeval tv;
long ret = vdso_gettimeofday(&tv, 0);
if (ret == 0) {
ksft_print_msg("The time is %lld.%06lld\n",
(long long)tv.tv_sec, (long long)tv.tv_usec);
ksft_test_result_pass("%s\n", name[0]);
} else {
ksft_test_result_fail("%s\n", name[0]);
}
}
static void vdso_test_clock_gettime(clockid_t clk_id)
{
/* Find clock_gettime. */
vdso_clock_gettime_t vdso_clock_gettime =
(vdso_clock_gettime_t)vdso_sym(version, name[1]);
if (!vdso_clock_gettime) {
ksft_print_msg("Couldn't find %s\n", name[1]);
ksft_test_result_skip("%s %s\n", name[1],
vdso_clock_name[clk_id]);
return;
}
struct timespec ts;
long ret = vdso_clock_gettime(clk_id, &ts);
if (ret == 0) {
ksft_print_msg("The time is %lld.%06lld\n",
(long long)ts.tv_sec, (long long)ts.tv_nsec);
ksft_test_result_pass("%s %s\n", name[1],
vdso_clock_name[clk_id]);
} else {
ksft_test_result_fail("%s %s\n", name[1],
vdso_clock_name[clk_id]);
}
}
static void vdso_test_time(void)
{
/* Find time. */
vdso_time_t vdso_time =
(vdso_time_t)vdso_sym(version, name[2]);
if (!vdso_time) {
ksft_print_msg("Couldn't find %s\n", name[2]);
ksft_test_result_skip("%s\n", name[2]);
return;
}
long ret = vdso_time(NULL);
if (ret > 0) {
ksft_print_msg("The time in hours since January 1, 1970 is %lld\n",
(long long)(ret / 3600));
ksft_test_result_pass("%s\n", name[2]);
} else {
ksft_test_result_fail("%s\n", name[2]);
}
}
static void vdso_test_clock_getres(clockid_t clk_id)
{
int clock_getres_fail = 0;
/* Find clock_getres. */
vdso_clock_getres_t vdso_clock_getres =
(vdso_clock_getres_t)vdso_sym(version, name[3]);
if (!vdso_clock_getres) {
ksft_print_msg("Couldn't find %s\n", name[3]);
ksft_test_result_skip("%s %s\n", name[3],
vdso_clock_name[clk_id]);
return;
}
struct timespec ts, sys_ts;
long ret = vdso_clock_getres(clk_id, &ts);
if (ret == 0) {
ksft_print_msg("The vdso resolution is %lld %lld\n",
(long long)ts.tv_sec, (long long)ts.tv_nsec);
} else {
clock_getres_fail++;
}
ret = syscall(SYS_clock_getres, clk_id, &sys_ts);
ksft_print_msg("The syscall resolution is %lld %lld\n",
(long long)sys_ts.tv_sec, (long long)sys_ts.tv_nsec);
if ((sys_ts.tv_sec != ts.tv_sec) || (sys_ts.tv_nsec != ts.tv_nsec))
clock_getres_fail++;
if (clock_getres_fail > 0) {
ksft_test_result_fail("%s %s\n", name[3],
vdso_clock_name[clk_id]);
} else {
ksft_test_result_pass("%s %s\n", name[3],
vdso_clock_name[clk_id]);
}
}
/*
* This function calls vdso_test_clock_gettime and vdso_test_clock_getres
* with different values for clock_id.
*/
static inline void vdso_test_clock(clockid_t clock_id)
{
ksft_print_msg("clock_id: %s\n", vdso_clock_name[clock_id]);
vdso_test_clock_gettime(clock_id);
vdso_test_clock_getres(clock_id);
}
#define VDSO_TEST_PLAN 16
int main(int argc, char **argv)
{
unsigned long sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR);
ksft_print_header();
ksft_set_plan(VDSO_TEST_PLAN);
if (!sysinfo_ehdr) {
ksft_print_msg("AT_SYSINFO_EHDR is not present!\n");
return KSFT_SKIP;
}
version = versions[VDSO_VERSION];
name = (const char **)&names[VDSO_NAMES];
ksft_print_msg("[vDSO kselftest] VDSO_VERSION: %s\n", version);
vdso_init_from_sysinfo_ehdr(getauxval(AT_SYSINFO_EHDR));
vdso_test_gettimeofday();
#if _POSIX_TIMERS > 0
#ifdef CLOCK_REALTIME
vdso_test_clock(CLOCK_REALTIME);
#endif
#ifdef CLOCK_BOOTTIME
vdso_test_clock(CLOCK_BOOTTIME);
#endif
#ifdef CLOCK_TAI
vdso_test_clock(CLOCK_TAI);
#endif
#ifdef CLOCK_REALTIME_COARSE
vdso_test_clock(CLOCK_REALTIME_COARSE);
#endif
#ifdef CLOCK_MONOTONIC
vdso_test_clock(CLOCK_MONOTONIC);
#endif
#ifdef CLOCK_MONOTONIC_RAW
vdso_test_clock(CLOCK_MONOTONIC_RAW);
#endif
#ifdef CLOCK_MONOTONIC_COARSE
vdso_test_clock(CLOCK_MONOTONIC_COARSE);
#endif
#endif
vdso_test_time();
ksft_print_cnts();
return ksft_get_fail_cnt() == 0 ? KSFT_PASS : KSFT_FAIL;
}
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