[thirdparty/systemd.git] / src / test / test-util.c

/* SPDX-License-Identifier: LGPL-2.1+ */

#include <errno.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>

#include "def.h"
#include "fileio.h"
#include "fs-util.h"
#include "missing_syscall.h"
#include "parse-util.h"
#include "process-util.h"
#include "raw-clone.h"
#include "rm-rf.h"
#include "string-util.h"
#include "tests.h"
#include "util.h"

static void test_align_power2(void) {
        unsigned long i, p2;

        log_info("/* %s */", __func__);

        assert_se(ALIGN_POWER2(0) == 0);
        assert_se(ALIGN_POWER2(1) == 1);
        assert_se(ALIGN_POWER2(2) == 2);
        assert_se(ALIGN_POWER2(3) == 4);
        assert_se(ALIGN_POWER2(12) == 16);

        assert_se(ALIGN_POWER2(ULONG_MAX) == 0);
        assert_se(ALIGN_POWER2(ULONG_MAX - 1) == 0);
        assert_se(ALIGN_POWER2(ULONG_MAX - 1024) == 0);
        assert_se(ALIGN_POWER2(ULONG_MAX / 2) == ULONG_MAX / 2 + 1);
        assert_se(ALIGN_POWER2(ULONG_MAX + 1) == 0);

        for (i = 1; i < 131071; ++i) {
                for (p2 = 1; p2 < i; p2 <<= 1)
                        /* empty */ ;

                assert_se(ALIGN_POWER2(i) == p2);
        }

        for (i = ULONG_MAX - 1024; i < ULONG_MAX; ++i) {
                for (p2 = 1; p2 && p2 < i; p2 <<= 1)
                        /* empty */ ;

                assert_se(ALIGN_POWER2(i) == p2);
        }
}

static void test_max(void) {
        static const struct {
                int a;
                int b[CONST_MAX(10, 100)];
        } val1 = {
                .a = CONST_MAX(10, 100),
        };
        int d = 0;
        unsigned long x = 12345;
        unsigned long y = 54321;
        const char str[] = "a_string_constant";
        const unsigned long long arr[] = {9999ULL, 10ULL, 0ULL, 3000ULL, 2000ULL, 1000ULL, 100ULL, 9999999ULL};
        void *p = (void *)str;
        void *q = (void *)&str[16];

        log_info("/* %s */", __func__);

        assert_cc(sizeof(val1.b) == sizeof(int) * 100);

        /* CONST_MAX returns (void) instead of a value if the passed arguments
         * are not of the same type or not constant expressions. */
        assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 10)), int));
        assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 1U)), void));

        assert_se(val1.a == 100);
        assert_se(MAX(++d, 0) == 1);
        assert_se(d == 1);

        assert_cc(MAXSIZE(char[3], uint16_t) == 3);
        assert_cc(MAXSIZE(char[3], uint32_t) == 4);
        assert_cc(MAXSIZE(char, long) == sizeof(long));

        assert_se(MAX(-5, 5) == 5);
        assert_se(MAX(5, 5) == 5);
        assert_se(MAX(MAX(1, MAX(2, MAX(3, 4))), 5) == 5);
        assert_se(MAX(MAX(1, MAX(2, MAX(3, 2))), 1) == 3);
        assert_se(MAX(MIN(1, MIN(2, MIN(3, 4))), 5) == 5);
        assert_se(MAX(MAX(1, MIN(2, MIN(3, 2))), 1) == 2);
        assert_se(LESS_BY(8, 4) == 4);
        assert_se(LESS_BY(8, 8) == 0);
        assert_se(LESS_BY(4, 8) == 0);
        assert_se(LESS_BY(16, LESS_BY(8, 4)) == 12);
        assert_se(LESS_BY(4, LESS_BY(8, 4)) == 0);
        assert_se(CMP(3, 5) == -1);
        assert_se(CMP(5, 3) == 1);
        assert_se(CMP(5, 5) == 0);
        assert_se(CMP(x, y) == -1);
        assert_se(CMP(y, x) == 1);
        assert_se(CMP(x, x) == 0);
        assert_se(CMP(y, y) == 0);
        assert_se(CMP(UINT64_MAX, (uint64_t) 0) == 1);
        assert_se(CMP((uint64_t) 0, UINT64_MAX) == -1);
        assert_se(CMP(UINT64_MAX, UINT64_MAX) == 0);
        assert_se(CMP(INT64_MIN, INT64_MAX) == -1);
        assert_se(CMP(INT64_MAX, INT64_MIN) == 1);
        assert_se(CMP(INT64_MAX, INT64_MAX) == 0);
        assert_se(CMP(INT64_MIN, INT64_MIN) == 0);
        assert_se(CMP(INT64_MAX, (int64_t) 0) == 1);
        assert_se(CMP((int64_t) 0, INT64_MIN) == 1);
        assert_se(CMP(INT64_MIN, (int64_t) 0) == -1);
        assert_se(CMP((int64_t) 0, INT64_MAX) == -1);
        assert_se(CMP(&str[2], &str[7]) == -1);
        assert_se(CMP(&str[2], &str[2]) == 0);
        assert_se(CMP(&str[7], (const char *)str) == 1);
        assert_se(CMP(str[2], str[7]) == 1);
        assert_se(CMP(str[7], *str) == 1);
        assert_se(CMP((const unsigned long long *)arr, &arr[3]) == -1);
        assert_se(CMP(*arr, arr[3]) == 1);
        assert_se(CMP(p, q) == -1);
        assert_se(CMP(q, p) == 1);
        assert_se(CMP(p, p) == 0);
        assert_se(CMP(q, q) == 0);
        assert_se(CLAMP(-5, 0, 1) == 0);
        assert_se(CLAMP(5, 0, 1) == 1);
        assert_se(CLAMP(5, -10, 1) == 1);
        assert_se(CLAMP(5, -10, 10) == 5);
        assert_se(CLAMP(CLAMP(0, -10, 10), CLAMP(-5, 10, 20), CLAMP(100, -5, 20)) == 10);
}

#pragma GCC diagnostic push
#ifdef __clang__
#  pragma GCC diagnostic ignored "-Waddress-of-packed-member"
#endif

static void test_container_of(void) {
        struct mytype {
                uint8_t pad1[3];
                uint64_t v1;
                uint8_t pad2[2];
                uint32_t v2;
        } _packed_ myval = { };

        log_info("/* %s */", __func__);

        assert_cc(sizeof(myval) == 17);
        assert_se(container_of(&myval.v1, struct mytype, v1) == &myval);
        assert_se(container_of(&myval.v2, struct mytype, v2) == &myval);
        assert_se(container_of(&container_of(&myval.v2,
                                             struct mytype,
                                             v2)->v1,
                               struct mytype,
                               v1) == &myval);
}

#pragma GCC diagnostic pop

static void test_div_round_up(void) {
        int div;

        log_info("/* %s */", __func__);

        /* basic tests */
        assert_se(DIV_ROUND_UP(0, 8) == 0);
        assert_se(DIV_ROUND_UP(1, 8) == 1);
        assert_se(DIV_ROUND_UP(8, 8) == 1);
        assert_se(DIV_ROUND_UP(12, 8) == 2);
        assert_se(DIV_ROUND_UP(16, 8) == 2);

        /* test multiple evaluation */
        div = 0;
        assert_se(DIV_ROUND_UP(div++, 8) == 0 && div == 1);
        assert_se(DIV_ROUND_UP(++div, 8) == 1 && div == 2);
        assert_se(DIV_ROUND_UP(8, div++) == 4 && div == 3);
        assert_se(DIV_ROUND_UP(8, ++div) == 2 && div == 4);

        /* overflow test with exact division */
        assert_se(sizeof(0U) == 4);
        assert_se(0xfffffffaU % 10U == 0U);
        assert_se(0xfffffffaU / 10U == 429496729U);
        assert_se(DIV_ROUND_UP(0xfffffffaU, 10U) == 429496729U);
        assert_se((0xfffffffaU + 10U - 1U) / 10U == 0U);
        assert_se(0xfffffffaU / 10U + !!(0xfffffffaU % 10U) == 429496729U);

        /* overflow test with rounded division */
        assert_se(0xfffffffdU % 10U == 3U);
        assert_se(0xfffffffdU / 10U == 429496729U);
        assert_se(DIV_ROUND_UP(0xfffffffdU, 10U) == 429496730U);
        assert_se((0xfffffffdU + 10U - 1U) / 10U == 0U);
        assert_se(0xfffffffdU / 10U + !!(0xfffffffdU % 10U) == 429496730U);
}

static void test_u64log2(void) {
        log_info("/* %s */", __func__);

        assert_se(u64log2(0) == 0);
        assert_se(u64log2(8) == 3);
        assert_se(u64log2(9) == 3);
        assert_se(u64log2(15) == 3);
        assert_se(u64log2(16) == 4);
        assert_se(u64log2(1024*1024) == 20);
        assert_se(u64log2(1024*1024+5) == 20);
}

static void test_protect_errno(void) {
        log_info("/* %s */", __func__);

        errno = 12;
        {
                PROTECT_ERRNO;
                errno = 11;
        }
        assert_se(errno == 12);
}

static void test_in_set(void) {
        log_info("/* %s */", __func__);

        assert_se(IN_SET(1, 1));
        assert_se(IN_SET(1, 1, 2, 3, 4));
        assert_se(IN_SET(2, 1, 2, 3, 4));
        assert_se(IN_SET(3, 1, 2, 3, 4));
        assert_se(IN_SET(4, 1, 2, 3, 4));
        assert_se(!IN_SET(0, 1));
        assert_se(!IN_SET(0, 1, 2, 3, 4));
}

static void test_log2i(void) {
        log_info("/* %s */", __func__);

        assert_se(log2i(1) == 0);
        assert_se(log2i(2) == 1);
        assert_se(log2i(3) == 1);
        assert_se(log2i(4) == 2);
        assert_se(log2i(32) == 5);
        assert_se(log2i(33) == 5);
        assert_se(log2i(63) == 5);
        assert_se(log2i(INT_MAX) == sizeof(int)*8-2);
}

static void test_eqzero(void) {
        const uint32_t zeros[] = {0, 0, 0};
        const uint32_t ones[] = {1, 1};
        const uint32_t mixed[] = {0, 1, 0, 0, 0};
        const uint8_t longer[] = {[55] = 255};

        log_info("/* %s */", __func__);

        assert_se(eqzero(zeros));
        assert_se(!eqzero(ones));
        assert_se(!eqzero(mixed));
        assert_se(!eqzero(longer));
}

static void test_raw_clone(void) {
        pid_t parent, pid, pid2;

        log_info("/* %s */", __func__);

        parent = getpid();
        log_info("before clone: getpid()→"PID_FMT, parent);
        assert_se(raw_getpid() == parent);

        pid = raw_clone(0);
        assert_se(pid >= 0);

        pid2 = raw_getpid();
        log_info("raw_clone: "PID_FMT" getpid()→"PID_FMT" raw_getpid()→"PID_FMT,
                 pid, getpid(), pid2);
        if (pid == 0) {
                assert_se(pid2 != parent);
                _exit(EXIT_SUCCESS);
        } else {
                int status;

                assert_se(pid2 == parent);
                waitpid(pid, &status, __WCLONE);
                assert_se(WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS);
        }

        errno = 0;
        assert_se(raw_clone(CLONE_FS|CLONE_NEWNS) == -1);
        assert_se(errno == EINVAL);
}

static void test_physical_memory(void) {
        uint64_t p;
        char buf[FORMAT_BYTES_MAX];

        log_info("/* %s */", __func__);

        p = physical_memory();
        assert_se(p > 0);
        assert_se(p < UINT64_MAX);
        assert_se(p % page_size() == 0);

        log_info("Memory: %s (%" PRIu64 ")", format_bytes(buf, sizeof(buf), p), p);
}

static void test_physical_memory_scale(void) {
        uint64_t p;

        log_info("/* %s */", __func__);

        p = physical_memory();

        assert_se(physical_memory_scale(0, 100) == 0);
        assert_se(physical_memory_scale(100, 100) == p);

        log_info("Memory original: %" PRIu64, physical_memory());
        log_info("Memory scaled by 50%%: %" PRIu64, physical_memory_scale(50, 100));
        log_info("Memory divided by 2: %" PRIu64, physical_memory() / 2);
        log_info("Page size: %zu", page_size());

        /* There might be an uneven number of pages, hence permit these calculations to be half a page off... */
        assert_se(page_size()/2 + physical_memory_scale(50, 100) - p/2 <= page_size());
        assert_se(physical_memory_scale(200, 100) == p*2);

        assert_se(physical_memory_scale(0, 1) == 0);
        assert_se(physical_memory_scale(1, 1) == p);
        assert_se(physical_memory_scale(2, 1) == p*2);

        assert_se(physical_memory_scale(0, 2) == 0);

        assert_se(page_size()/2 + physical_memory_scale(1, 2) - p/2 <= page_size());
        assert_se(physical_memory_scale(2, 2) == p);
        assert_se(physical_memory_scale(4, 2) == p*2);

        assert_se(physical_memory_scale(0, UINT32_MAX) == 0);
        assert_se(physical_memory_scale(UINT32_MAX, UINT32_MAX) == p);

        /* overflow */
        assert_se(physical_memory_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
}

static void test_system_tasks_max(void) {
        uint64_t t;

        log_info("/* %s */", __func__);

        t = system_tasks_max();
        assert_se(t > 0);
        assert_se(t < UINT64_MAX);

        log_info("Max tasks: %" PRIu64, t);
}

static void test_system_tasks_max_scale(void) {
        uint64_t t;

        log_info("/* %s */", __func__);

        t = system_tasks_max();

        assert_se(system_tasks_max_scale(0, 100) == 0);
        assert_se(system_tasks_max_scale(100, 100) == t);

        assert_se(system_tasks_max_scale(0, 1) == 0);
        assert_se(system_tasks_max_scale(1, 1) == t);
        assert_se(system_tasks_max_scale(2, 1) == 2*t);

        assert_se(system_tasks_max_scale(0, 2) == 0);
        assert_se(system_tasks_max_scale(1, 2) == t/2);
        assert_se(system_tasks_max_scale(2, 2) == t);
        assert_se(system_tasks_max_scale(3, 2) == (3*t)/2);
        assert_se(system_tasks_max_scale(4, 2) == t*2);

        assert_se(system_tasks_max_scale(0, UINT32_MAX) == 0);
        assert_se(system_tasks_max_scale((UINT32_MAX-1)/2, UINT32_MAX-1) == t/2);
        assert_se(system_tasks_max_scale(UINT32_MAX, UINT32_MAX) == t);

        /* overflow */

        assert_se(system_tasks_max_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
}

int main(int argc, char *argv[]) {
        test_setup_logging(LOG_INFO);

        test_align_power2();
        test_max();
        test_container_of();
        test_div_round_up();
        test_u64log2();
        test_protect_errno();
        test_in_set();
        test_log2i();
        test_eqzero();
        test_raw_clone();
        test_physical_memory();
        test_physical_memory_scale();
        test_system_tasks_max();
        test_system_tasks_max_scale();

        return 0;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
539ad707	2
618234a5	3	#include <errno.h>
618234a5	4	#include <string.h>
8852362b	5	#include <sys/wait.h>
618234a5	6	#include <unistd.h>
539ad707	7
65b3903f ZJS	8	#include "def.h"
65b3903f ZJS	9	#include "fileio.h"
f4f15635	10	#include "fs-util.h"
36dd5ffd	11	#include "missing_syscall.h"
d9ab2bcf	12	#include "parse-util.h"
dccca82b	13	#include "process-util.h"
8869a0b4	14	#include "raw-clone.h"
618234a5	15	#include "rm-rf.h"
07630cea	16	#include "string-util.h"
09c984c6	17	#include "tests.h"
618234a5	18	#include "util.h"
539ad707	19
625e870b DH	20	static void test_align_power2(void) {
	21	unsigned long i, p2;
	22
09c984c6 ZJS	23	log_info("/* %s */", __func__);
09c984c6 ZJS	24
625e870b DH	25	assert_se(ALIGN_POWER2(0) == 0);
	26	assert_se(ALIGN_POWER2(1) == 1);
	27	assert_se(ALIGN_POWER2(2) == 2);
	28	assert_se(ALIGN_POWER2(3) == 4);
	29	assert_se(ALIGN_POWER2(12) == 16);
	30
	31	assert_se(ALIGN_POWER2(ULONG_MAX) == 0);
	32	assert_se(ALIGN_POWER2(ULONG_MAX - 1) == 0);
	33	assert_se(ALIGN_POWER2(ULONG_MAX - 1024) == 0);
	34	assert_se(ALIGN_POWER2(ULONG_MAX / 2) == ULONG_MAX / 2 + 1);
	35	assert_se(ALIGN_POWER2(ULONG_MAX + 1) == 0);
	36
	37	for (i = 1; i < 131071; ++i) {
	38	for (p2 = 1; p2 < i; p2 <<= 1)
	39	/* empty */ ;
	40
	41	assert_se(ALIGN_POWER2(i) == p2);
	42	}
	43
	44	for (i = ULONG_MAX - 1024; i < ULONG_MAX; ++i) {
	45	for (p2 = 1; p2 && p2 < i; p2 <<= 1)
	46	/* empty */ ;
	47
	48	assert_se(ALIGN_POWER2(i) == p2);
	49	}
	50	}
	51
7242d742 DH	52	static void test_max(void) {
	53	static const struct {
	54	int a;
	55	int b[CONST_MAX(10, 100)];
	56	} val1 = {
	57	.a = CONST_MAX(10, 100),
	58	};
	59	int d = 0;
84fb2131 FB	60	unsigned long x = 12345;
	61	unsigned long y = 54321;
	62	const char str[] = "a_string_constant";
	63	const unsigned long long arr[] = {9999ULL, 10ULL, 0ULL, 3000ULL, 2000ULL, 1000ULL, 100ULL, 9999999ULL};
	64	void p = (void )str;
	65	void q = (void )&str[16];
7242d742	66
09c984c6 ZJS	67	log_info("/* %s */", __func__);
09c984c6 ZJS	68
7242d742 DH	69	assert_cc(sizeof(val1.b) == sizeof(int) * 100);
	70
	71	/* CONST_MAX returns (void) instead of a value if the passed arguments
	72	* are not of the same type or not constant expressions. */
	73	assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 10)), int));
7242d742 DH	74	assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 1U)), void));
	75
	76	assert_se(val1.a == 100);
	77	assert_se(MAX(++d, 0) == 1);
	78	assert_se(d == 1);
40a1eebd DH	79
	80	assert_cc(MAXSIZE(char[3], uint16_t) == 3);
	81	assert_cc(MAXSIZE(char[3], uint32_t) == 4);
	82	assert_cc(MAXSIZE(char, long) == sizeof(long));
667a0377 DH	83
	84	assert_se(MAX(-5, 5) == 5);
	85	assert_se(MAX(5, 5) == 5);
	86	assert_se(MAX(MAX(1, MAX(2, MAX(3, 4))), 5) == 5);
	87	assert_se(MAX(MAX(1, MAX(2, MAX(3, 2))), 1) == 3);
	88	assert_se(MAX(MIN(1, MIN(2, MIN(3, 4))), 5) == 5);
	89	assert_se(MAX(MAX(1, MIN(2, MIN(3, 2))), 1) == 2);
	90	assert_se(LESS_BY(8, 4) == 4);
	91	assert_se(LESS_BY(8, 8) == 0);
	92	assert_se(LESS_BY(4, 8) == 0);
	93	assert_se(LESS_BY(16, LESS_BY(8, 4)) == 12);
	94	assert_se(LESS_BY(4, LESS_BY(8, 4)) == 0);
ef6e83f0 YW	95	assert_se(CMP(3, 5) == -1);
ef6e83f0 YW	96	assert_se(CMP(5, 3) == 1);
84fb2131 FB	97	assert_se(CMP(5, 5) == 0);
	98	assert_se(CMP(x, y) == -1);
	99	assert_se(CMP(y, x) == 1);
	100	assert_se(CMP(x, x) == 0);
	101	assert_se(CMP(y, y) == 0);
ef6e83f0 YW	102	assert_se(CMP(UINT64_MAX, (uint64_t) 0) == 1);
ef6e83f0 YW	103	assert_se(CMP((uint64_t) 0, UINT64_MAX) == -1);
84fb2131 FB	104	assert_se(CMP(UINT64_MAX, UINT64_MAX) == 0);
	105	assert_se(CMP(INT64_MIN, INT64_MAX) == -1);
	106	assert_se(CMP(INT64_MAX, INT64_MIN) == 1);
	107	assert_se(CMP(INT64_MAX, INT64_MAX) == 0);
	108	assert_se(CMP(INT64_MIN, INT64_MIN) == 0);
ef6e83f0 YW	109	assert_se(CMP(INT64_MAX, (int64_t) 0) == 1);
	110	assert_se(CMP((int64_t) 0, INT64_MIN) == 1);
	111	assert_se(CMP(INT64_MIN, (int64_t) 0) == -1);
	112	assert_se(CMP((int64_t) 0, INT64_MAX) == -1);
84fb2131 FB	113	assert_se(CMP(&str[2], &str[7]) == -1);
	114	assert_se(CMP(&str[2], &str[2]) == 0);
	115	assert_se(CMP(&str[7], (const char *)str) == 1);
	116	assert_se(CMP(str[2], str[7]) == 1);
	117	assert_se(CMP(str[7], *str) == 1);
	118	assert_se(CMP((const unsigned long long *)arr, &arr[3]) == -1);
	119	assert_se(CMP(*arr, arr[3]) == 1);
	120	assert_se(CMP(p, q) == -1);
	121	assert_se(CMP(q, p) == 1);
	122	assert_se(CMP(p, p) == 0);
	123	assert_se(CMP(q, q) == 0);
667a0377 DH	124	assert_se(CLAMP(-5, 0, 1) == 0);
	125	assert_se(CLAMP(5, 0, 1) == 1);
	126	assert_se(CLAMP(5, -10, 1) == 1);
	127	assert_se(CLAMP(5, -10, 10) == 5);
	128	assert_se(CLAMP(CLAMP(0, -10, 10), CLAMP(-5, 10, 20), CLAMP(100, -5, 20)) == 10);
7242d742 DH	129	}
7242d742 DH	130
09571e3f ZJS	131	#pragma GCC diagnostic push
	132	#ifdef __clang__
	133	# pragma GCC diagnostic ignored "-Waddress-of-packed-member"
	134	#endif
	135
fb835651 DH	136	static void test_container_of(void) {
	137	struct mytype {
	138	uint8_t pad1[3];
	139	uint64_t v1;
	140	uint8_t pad2[2];
	141	uint32_t v2;
	142	} _packed_ myval = { };
	143
09c984c6 ZJS	144	log_info("/* %s */", __func__);
09c984c6 ZJS	145
fb835651 DH	146	assert_cc(sizeof(myval) == 17);
	147	assert_se(container_of(&myval.v1, struct mytype, v1) == &myval);
	148	assert_se(container_of(&myval.v2, struct mytype, v2) == &myval);
	149	assert_se(container_of(&container_of(&myval.v2,
	150	struct mytype,
	151	v2)->v1,
	152	struct mytype,
	153	v1) == &myval);
	154	}
	155
09571e3f ZJS	156	#pragma GCC diagnostic pop
09571e3f ZJS	157
180a60bc DH	158	static void test_div_round_up(void) {
	159	int div;
	160
09c984c6 ZJS	161	log_info("/* %s */", __func__);
09c984c6 ZJS	162
180a60bc DH	163	/* basic tests */
	164	assert_se(DIV_ROUND_UP(0, 8) == 0);
	165	assert_se(DIV_ROUND_UP(1, 8) == 1);
	166	assert_se(DIV_ROUND_UP(8, 8) == 1);
	167	assert_se(DIV_ROUND_UP(12, 8) == 2);
	168	assert_se(DIV_ROUND_UP(16, 8) == 2);
	169
	170	/* test multiple evaluation */
	171	div = 0;
	172	assert_se(DIV_ROUND_UP(div++, 8) == 0 && div == 1);
	173	assert_se(DIV_ROUND_UP(++div, 8) == 1 && div == 2);
	174	assert_se(DIV_ROUND_UP(8, div++) == 4 && div == 3);
	175	assert_se(DIV_ROUND_UP(8, ++div) == 2 && div == 4);
	176
	177	/* overflow test with exact division */
	178	assert_se(sizeof(0U) == 4);
	179	assert_se(0xfffffffaU % 10U == 0U);
	180	assert_se(0xfffffffaU / 10U == 429496729U);
	181	assert_se(DIV_ROUND_UP(0xfffffffaU, 10U) == 429496729U);
	182	assert_se((0xfffffffaU + 10U - 1U) / 10U == 0U);
	183	assert_se(0xfffffffaU / 10U + !!(0xfffffffaU % 10U) == 429496729U);
	184
	185	/* overflow test with rounded division */
	186	assert_se(0xfffffffdU % 10U == 3U);
	187	assert_se(0xfffffffdU / 10U == 429496729U);
	188	assert_se(DIV_ROUND_UP(0xfffffffdU, 10U) == 429496730U);
	189	assert_se((0xfffffffdU + 10U - 1U) / 10U == 0U);
	190	assert_se(0xfffffffdU / 10U + !!(0xfffffffdU % 10U) == 429496730U);
	191	}
	192
144e51ec	193	static void test_u64log2(void) {
09c984c6 ZJS	194	log_info("/* %s */", __func__);
09c984c6 ZJS	195
bdf7026e TA	196	assert_se(u64log2(0) == 0);
	197	assert_se(u64log2(8) == 3);
	198	assert_se(u64log2(9) == 3);
	199	assert_se(u64log2(15) == 3);
	200	assert_se(u64log2(16) == 4);
	201	assert_se(u64log2(1024*1024) == 20);
	202	assert_se(u64log2(1024*1024+5) == 20);
144e51ec CR	203	}
144e51ec CR	204
2a371001	205	static void test_protect_errno(void) {
09c984c6 ZJS	206	log_info("/* %s */", __func__);
09c984c6 ZJS	207
2a371001 ZJS	208	errno = 12;
	209	{
	210	PROTECT_ERRNO;
	211	errno = 11;
	212	}
bdf7026e	213	assert_se(errno == 12);
2a371001 ZJS	214	}
2a371001 ZJS	215
cabb7806	216	static void test_in_set(void) {
09c984c6 ZJS	217	log_info("/* %s */", __func__);
09c984c6 ZJS	218
cabb7806 LP	219	assert_se(IN_SET(1, 1));
	220	assert_se(IN_SET(1, 1, 2, 3, 4));
	221	assert_se(IN_SET(2, 1, 2, 3, 4));
	222	assert_se(IN_SET(3, 1, 2, 3, 4));
	223	assert_se(IN_SET(4, 1, 2, 3, 4));
	224	assert_se(!IN_SET(0, 1));
	225	assert_se(!IN_SET(0, 1, 2, 3, 4));
	226	}
	227
8fe90522	228	static void test_log2i(void) {
09c984c6 ZJS	229	log_info("/* %s */", __func__);
09c984c6 ZJS	230
8fe90522 ZJS	231	assert_se(log2i(1) == 0);
	232	assert_se(log2i(2) == 1);
	233	assert_se(log2i(3) == 1);
	234	assert_se(log2i(4) == 2);
	235	assert_se(log2i(32) == 5);
	236	assert_se(log2i(33) == 5);
	237	assert_se(log2i(63) == 5);
	238	assert_se(log2i(INT_MAX) == sizeof(int)*8-2);
	239	}
	240
7f6bfc56 ZJS	241	static void test_eqzero(void) {
	242	const uint32_t zeros[] = {0, 0, 0};
	243	const uint32_t ones[] = {1, 1};
	244	const uint32_t mixed[] = {0, 1, 0, 0, 0};
	245	const uint8_t longer[] = {[55] = 255};
	246
	247	log_info("/* %s */", __func__);
	248
	249	assert_se(eqzero(zeros));
	250	assert_se(!eqzero(ones));
	251	assert_se(!eqzero(mixed));
	252	assert_se(!eqzero(longer));
	253	}
	254
ee05e779 ZJS	255	static void test_raw_clone(void) {
	256	pid_t parent, pid, pid2;
	257
09c984c6 ZJS	258	log_info("/* %s */", __func__);
09c984c6 ZJS	259
ee05e779 ZJS	260	parent = getpid();
	261	log_info("before clone: getpid()→"PID_FMT, parent);
	262	assert_se(raw_getpid() == parent);
	263
8869a0b4	264	pid = raw_clone(0);
e50221bf	265	assert_se(pid >= 0);
ee05e779 ZJS	266
	267	pid2 = raw_getpid();
	268	log_info("raw_clone: "PID_FMT" getpid()→"PID_FMT" raw_getpid()→"PID_FMT,
	269	pid, getpid(), pid2);
0289a5bc	270	if (pid == 0) {
e50221bf	271	assert_se(pid2 != parent);
0289a5bc FB	272	_exit(EXIT_SUCCESS);
	273	} else {
	274	int status;
	275
e50221bf	276	assert_se(pid2 == parent);
0289a5bc FB	277	waitpid(pid, &status, __WCLONE);
	278	assert_se(WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS);
	279	}
96f64eb5 MG	280
	281	errno = 0;
	282	assert_se(raw_clone(CLONE_FS\|CLONE_NEWNS) == -1);
	283	assert_se(errno == EINVAL);
ee05e779 ZJS	284	}
ee05e779 ZJS	285
d9ab2bcf LP	286	static void test_physical_memory(void) {
	287	uint64_t p;
	288	char buf[FORMAT_BYTES_MAX];
	289
09c984c6 ZJS	290	log_info("/* %s */", __func__);
09c984c6 ZJS	291
d9ab2bcf LP	292	p = physical_memory();
	293	assert_se(p > 0);
	294	assert_se(p < UINT64_MAX);
	295	assert_se(p % page_size() == 0);
	296
d8cf2ac7 LP	297	log_info("Memory: %s (%" PRIu64 ")", format_bytes(buf, sizeof(buf), p), p);
	298	}
	299
	300	static void test_physical_memory_scale(void) {
	301	uint64_t p;
	302
09c984c6 ZJS	303	log_info("/* %s */", __func__);
09c984c6 ZJS	304
d8cf2ac7 LP	305	p = physical_memory();
	306
	307	assert_se(physical_memory_scale(0, 100) == 0);
	308	assert_se(physical_memory_scale(100, 100) == p);
	309
	310	log_info("Memory original: %" PRIu64, physical_memory());
	311	log_info("Memory scaled by 50%%: %" PRIu64, physical_memory_scale(50, 100));
	312	log_info("Memory divided by 2: %" PRIu64, physical_memory() / 2);
	313	log_info("Page size: %zu", page_size());
	314
	315	/* There might be an uneven number of pages, hence permit these calculations to be half a page off... */
	316	assert_se(page_size()/2 + physical_memory_scale(50, 100) - p/2 <= page_size());
	317	assert_se(physical_memory_scale(200, 100) == p*2);
	318
	319	assert_se(physical_memory_scale(0, 1) == 0);
	320	assert_se(physical_memory_scale(1, 1) == p);
	321	assert_se(physical_memory_scale(2, 1) == p*2);
	322
	323	assert_se(physical_memory_scale(0, 2) == 0);
	324
	325	assert_se(page_size()/2 + physical_memory_scale(1, 2) - p/2 <= page_size());
	326	assert_se(physical_memory_scale(2, 2) == p);
	327	assert_se(physical_memory_scale(4, 2) == p*2);
	328
	329	assert_se(physical_memory_scale(0, UINT32_MAX) == 0);
	330	assert_se(physical_memory_scale(UINT32_MAX, UINT32_MAX) == p);
	331
	332	/* overflow */
	333	assert_se(physical_memory_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
83f8e808 LP	334	}
	335
	336	static void test_system_tasks_max(void) {
	337	uint64_t t;
	338
09c984c6 ZJS	339	log_info("/* %s */", __func__);
09c984c6 ZJS	340
83f8e808 LP	341	t = system_tasks_max();
	342	assert_se(t > 0);
	343	assert_se(t < UINT64_MAX);
	344
	345	log_info("Max tasks: %" PRIu64, t);
	346	}
	347
	348	static void test_system_tasks_max_scale(void) {
	349	uint64_t t;
	350
09c984c6 ZJS	351	log_info("/* %s */", __func__);
09c984c6 ZJS	352
83f8e808 LP	353	t = system_tasks_max();
	354
	355	assert_se(system_tasks_max_scale(0, 100) == 0);
	356	assert_se(system_tasks_max_scale(100, 100) == t);
	357
	358	assert_se(system_tasks_max_scale(0, 1) == 0);
	359	assert_se(system_tasks_max_scale(1, 1) == t);
	360	assert_se(system_tasks_max_scale(2, 1) == 2*t);
	361
	362	assert_se(system_tasks_max_scale(0, 2) == 0);
	363	assert_se(system_tasks_max_scale(1, 2) == t/2);
	364	assert_se(system_tasks_max_scale(2, 2) == t);
	365	assert_se(system_tasks_max_scale(3, 2) == (3*t)/2);
	366	assert_se(system_tasks_max_scale(4, 2) == t*2);
	367
	368	assert_se(system_tasks_max_scale(0, UINT32_MAX) == 0);
	369	assert_se(system_tasks_max_scale((UINT32_MAX-1)/2, UINT32_MAX-1) == t/2);
	370	assert_se(system_tasks_max_scale(UINT32_MAX, UINT32_MAX) == t);
	371
	372	/* overflow */
d8cf2ac7	373
83f8e808	374	assert_se(system_tasks_max_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
d9ab2bcf LP	375	}
d9ab2bcf LP	376
539ad707	377	int main(int argc, char *argv[]) {
09c984c6	378	test_setup_logging(LOG_INFO);
9480794b	379
625e870b	380	test_align_power2();
7242d742	381	test_max();
fb835651	382	test_container_of();
180a60bc	383	test_div_round_up();
144e51ec	384	test_u64log2();
2a371001	385	test_protect_errno();
cabb7806	386	test_in_set();
8fe90522	387	test_log2i();
7f6bfc56	388	test_eqzero();
ee05e779	389	test_raw_clone();
d9ab2bcf	390	test_physical_memory();
d8cf2ac7	391	test_physical_memory_scale();
83f8e808 LP	392	test_system_tasks_max();
83f8e808 LP	393	test_system_tasks_max_scale();
539ad707 TA	394
	395	return 0;
	396	}