diff options
Diffstat (limited to 'tools/testing/selftests/vDSO/vdso_test_abi.c')
| -rw-r--r-- | tools/testing/selftests/vDSO/vdso_test_abi.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/tools/testing/selftests/vDSO/vdso_test_abi.c b/tools/testing/selftests/vDSO/vdso_test_abi.c new file mode 100644 index 000000000000..96d32fd65b42 --- /dev/null +++ b/tools/testing/selftests/vDSO/vdso_test_abi.c @@ -0,0 +1,239 @@ +// 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; +} |