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1// SPDX-License-Identifier: GPL-2.02/*3 * vdso_full_test.c: Sample code to test all the timers.4 * Copyright (c) 2019 Arm Ltd.5 *6 * Compile with:7 * gcc -std=gnu99 vdso_full_test.c parse_vdso.c8 *9 */10 11#include <stdint.h>12#include <elf.h>13#include <stdio.h>14#include <time.h>15#include <sys/auxv.h>16#include <sys/time.h>17#define _GNU_SOURCE18#include <unistd.h>19#include <sys/syscall.h>20 21#include "../kselftest.h"22#include "vdso_config.h"23#include "vdso_call.h"24#include "parse_vdso.h"25 26static const char *version;27static const char **name;28 29typedef long (*vdso_gettimeofday_t)(struct timeval *tv, struct timezone *tz);30typedef long (*vdso_clock_gettime_t)(clockid_t clk_id, struct timespec *ts);31typedef long (*vdso_clock_getres_t)(clockid_t clk_id, struct timespec *ts);32typedef time_t (*vdso_time_t)(time_t *t);33 34const char *vdso_clock_name[12] = {35 "CLOCK_REALTIME",36 "CLOCK_MONOTONIC",37 "CLOCK_PROCESS_CPUTIME_ID",38 "CLOCK_THREAD_CPUTIME_ID",39 "CLOCK_MONOTONIC_RAW",40 "CLOCK_REALTIME_COARSE",41 "CLOCK_MONOTONIC_COARSE",42 "CLOCK_BOOTTIME",43 "CLOCK_REALTIME_ALARM",44 "CLOCK_BOOTTIME_ALARM",45 "CLOCK_SGI_CYCLE",46 "CLOCK_TAI",47};48 49static void vdso_test_gettimeofday(void)50{51 /* Find gettimeofday. */52 vdso_gettimeofday_t vdso_gettimeofday =53 (vdso_gettimeofday_t)vdso_sym(version, name[0]);54 55 if (!vdso_gettimeofday) {56 ksft_print_msg("Couldn't find %s\n", name[0]);57 ksft_test_result_skip("%s\n", name[0]);58 return;59 }60 61 struct timeval tv;62 long ret = VDSO_CALL(vdso_gettimeofday, 2, &tv, 0);63 64 if (ret == 0) {65 ksft_print_msg("The time is %lld.%06lld\n",66 (long long)tv.tv_sec, (long long)tv.tv_usec);67 ksft_test_result_pass("%s\n", name[0]);68 } else {69 ksft_test_result_fail("%s\n", name[0]);70 }71}72 73static void vdso_test_clock_gettime(clockid_t clk_id)74{75 /* Find clock_gettime. */76 vdso_clock_gettime_t vdso_clock_gettime =77 (vdso_clock_gettime_t)vdso_sym(version, name[1]);78 79 if (!vdso_clock_gettime) {80 ksft_print_msg("Couldn't find %s\n", name[1]);81 ksft_test_result_skip("%s %s\n", name[1],82 vdso_clock_name[clk_id]);83 return;84 }85 86 struct timespec ts;87 long ret = VDSO_CALL(vdso_clock_gettime, 2, clk_id, &ts);88 89 if (ret == 0) {90 ksft_print_msg("The time is %lld.%06lld\n",91 (long long)ts.tv_sec, (long long)ts.tv_nsec);92 ksft_test_result_pass("%s %s\n", name[1],93 vdso_clock_name[clk_id]);94 } else {95 ksft_test_result_fail("%s %s\n", name[1],96 vdso_clock_name[clk_id]);97 }98}99 100static void vdso_test_time(void)101{102 /* Find time. */103 vdso_time_t vdso_time =104 (vdso_time_t)vdso_sym(version, name[2]);105 106 if (!vdso_time) {107 ksft_print_msg("Couldn't find %s\n", name[2]);108 ksft_test_result_skip("%s\n", name[2]);109 return;110 }111 112 long ret = VDSO_CALL(vdso_time, 1, NULL);113 114 if (ret > 0) {115 ksft_print_msg("The time in hours since January 1, 1970 is %lld\n",116 (long long)(ret / 3600));117 ksft_test_result_pass("%s\n", name[2]);118 } else {119 ksft_test_result_fail("%s\n", name[2]);120 }121}122 123static void vdso_test_clock_getres(clockid_t clk_id)124{125 int clock_getres_fail = 0;126 127 /* Find clock_getres. */128 vdso_clock_getres_t vdso_clock_getres =129 (vdso_clock_getres_t)vdso_sym(version, name[3]);130 131 if (!vdso_clock_getres) {132 ksft_print_msg("Couldn't find %s\n", name[3]);133 ksft_test_result_skip("%s %s\n", name[3],134 vdso_clock_name[clk_id]);135 return;136 }137 138 struct timespec ts, sys_ts;139 long ret = VDSO_CALL(vdso_clock_getres, 2, clk_id, &ts);140 141 if (ret == 0) {142 ksft_print_msg("The vdso resolution is %lld %lld\n",143 (long long)ts.tv_sec, (long long)ts.tv_nsec);144 } else {145 clock_getres_fail++;146 }147 148 ret = syscall(SYS_clock_getres, clk_id, &sys_ts);149 150 ksft_print_msg("The syscall resolution is %lld %lld\n",151 (long long)sys_ts.tv_sec, (long long)sys_ts.tv_nsec);152 153 if ((sys_ts.tv_sec != ts.tv_sec) || (sys_ts.tv_nsec != ts.tv_nsec))154 clock_getres_fail++;155 156 if (clock_getres_fail > 0) {157 ksft_test_result_fail("%s %s\n", name[3],158 vdso_clock_name[clk_id]);159 } else {160 ksft_test_result_pass("%s %s\n", name[3],161 vdso_clock_name[clk_id]);162 }163}164 165/*166 * This function calls vdso_test_clock_gettime and vdso_test_clock_getres167 * with different values for clock_id.168 */169static inline void vdso_test_clock(clockid_t clock_id)170{171 ksft_print_msg("clock_id: %s\n", vdso_clock_name[clock_id]);172 173 vdso_test_clock_gettime(clock_id);174 175 vdso_test_clock_getres(clock_id);176}177 178#define VDSO_TEST_PLAN 16179 180int main(int argc, char **argv)181{182 unsigned long sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR);183 184 ksft_print_header();185 ksft_set_plan(VDSO_TEST_PLAN);186 187 if (!sysinfo_ehdr) {188 ksft_print_msg("AT_SYSINFO_EHDR is not present!\n");189 return KSFT_SKIP;190 }191 192 version = versions[VDSO_VERSION];193 name = (const char **)&names[VDSO_NAMES];194 195 ksft_print_msg("[vDSO kselftest] VDSO_VERSION: %s\n", version);196 197 vdso_init_from_sysinfo_ehdr(getauxval(AT_SYSINFO_EHDR));198 199 vdso_test_gettimeofday();200 201#if _POSIX_TIMERS > 0202 203#ifdef CLOCK_REALTIME204 vdso_test_clock(CLOCK_REALTIME);205#endif206 207#ifdef CLOCK_BOOTTIME208 vdso_test_clock(CLOCK_BOOTTIME);209#endif210 211#ifdef CLOCK_TAI212 vdso_test_clock(CLOCK_TAI);213#endif214 215#ifdef CLOCK_REALTIME_COARSE216 vdso_test_clock(CLOCK_REALTIME_COARSE);217#endif218 219#ifdef CLOCK_MONOTONIC220 vdso_test_clock(CLOCK_MONOTONIC);221#endif222 223#ifdef CLOCK_MONOTONIC_RAW224 vdso_test_clock(CLOCK_MONOTONIC_RAW);225#endif226 227#ifdef CLOCK_MONOTONIC_COARSE228 vdso_test_clock(CLOCK_MONOTONIC_COARSE);229#endif230 231#endif232 233 vdso_test_time();234 235 ksft_print_cnts();236 return ksft_get_fail_cnt() == 0 ? KSFT_PASS : KSFT_FAIL;237}238