[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 "limits-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 "memory-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;
        } 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_unprotect_errno_inner_function(void) {
        PROTECT_ERRNO;

        errno = 2222;
}

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

        errno = 4711;

        PROTECT_ERRNO;

        errno = 815;

        UNPROTECT_ERRNO;

        assert_se(errno == 4711);

        test_unprotect_errno_inner_function();

        assert_se(errno == 4711);
}

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_unprotect_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"
eefc66aa	11	#include "limits-util.h"
36dd5ffd	12	#include "missing_syscall.h"
d9ab2bcf	13	#include "parse-util.h"
dccca82b	14	#include "process-util.h"
8869a0b4	15	#include "raw-clone.h"
618234a5	16	#include "rm-rf.h"
07630cea	17	#include "string-util.h"
09c984c6	18	#include "tests.h"
0a970718	19	#include "memory-util.h"
539ad707	20
625e870b DH	21	static void test_align_power2(void) {
	22	unsigned long i, p2;
	23
09c984c6 ZJS	24	log_info("/* %s */", __func__);
09c984c6 ZJS	25
625e870b DH	26	assert_se(ALIGN_POWER2(0) == 0);
	27	assert_se(ALIGN_POWER2(1) == 1);
	28	assert_se(ALIGN_POWER2(2) == 2);
	29	assert_se(ALIGN_POWER2(3) == 4);
	30	assert_se(ALIGN_POWER2(12) == 16);
	31
	32	assert_se(ALIGN_POWER2(ULONG_MAX) == 0);
	33	assert_se(ALIGN_POWER2(ULONG_MAX - 1) == 0);
	34	assert_se(ALIGN_POWER2(ULONG_MAX - 1024) == 0);
	35	assert_se(ALIGN_POWER2(ULONG_MAX / 2) == ULONG_MAX / 2 + 1);
	36	assert_se(ALIGN_POWER2(ULONG_MAX + 1) == 0);
	37
	38	for (i = 1; i < 131071; ++i) {
	39	for (p2 = 1; p2 < i; p2 <<= 1)
	40	/* empty */ ;
	41
	42	assert_se(ALIGN_POWER2(i) == p2);
	43	}
	44
	45	for (i = ULONG_MAX - 1024; i < ULONG_MAX; ++i) {
	46	for (p2 = 1; p2 && p2 < i; p2 <<= 1)
	47	/* empty */ ;
	48
	49	assert_se(ALIGN_POWER2(i) == p2);
	50	}
	51	}
	52
7242d742 DH	53	static void test_max(void) {
	54	static const struct {
	55	int a;
	56	int b[CONST_MAX(10, 100)];
	57	} val1 = {
	58	.a = CONST_MAX(10, 100),
	59	};
	60	int d = 0;
84fb2131 FB	61	unsigned long x = 12345;
	62	unsigned long y = 54321;
	63	const char str[] = "a_string_constant";
	64	const unsigned long long arr[] = {9999ULL, 10ULL, 0ULL, 3000ULL, 2000ULL, 1000ULL, 100ULL, 9999999ULL};
	65	void p = (void )str;
	66	void q = (void )&str[16];
7242d742	67
09c984c6 ZJS	68	log_info("/* %s */", __func__);
09c984c6 ZJS	69
7242d742 DH	70	assert_cc(sizeof(val1.b) == sizeof(int) * 100);
	71
	72	/* CONST_MAX returns (void) instead of a value if the passed arguments
	73	* are not of the same type or not constant expressions. */
	74	assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 10)), int));
7242d742 DH	75	assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 1U)), void));
	76
	77	assert_se(val1.a == 100);
	78	assert_se(MAX(++d, 0) == 1);
	79	assert_se(d == 1);
40a1eebd DH	80
	81	assert_cc(MAXSIZE(char[3], uint16_t) == 3);
	82	assert_cc(MAXSIZE(char[3], uint32_t) == 4);
	83	assert_cc(MAXSIZE(char, long) == sizeof(long));
667a0377 DH	84
	85	assert_se(MAX(-5, 5) == 5);
	86	assert_se(MAX(5, 5) == 5);
	87	assert_se(MAX(MAX(1, MAX(2, MAX(3, 4))), 5) == 5);
	88	assert_se(MAX(MAX(1, MAX(2, MAX(3, 2))), 1) == 3);
	89	assert_se(MAX(MIN(1, MIN(2, MIN(3, 4))), 5) == 5);
	90	assert_se(MAX(MAX(1, MIN(2, MIN(3, 2))), 1) == 2);
	91	assert_se(LESS_BY(8, 4) == 4);
	92	assert_se(LESS_BY(8, 8) == 0);
	93	assert_se(LESS_BY(4, 8) == 0);
	94	assert_se(LESS_BY(16, LESS_BY(8, 4)) == 12);
	95	assert_se(LESS_BY(4, LESS_BY(8, 4)) == 0);
ef6e83f0 YW	96	assert_se(CMP(3, 5) == -1);
ef6e83f0 YW	97	assert_se(CMP(5, 3) == 1);
84fb2131 FB	98	assert_se(CMP(5, 5) == 0);
	99	assert_se(CMP(x, y) == -1);
	100	assert_se(CMP(y, x) == 1);
	101	assert_se(CMP(x, x) == 0);
	102	assert_se(CMP(y, y) == 0);
ef6e83f0 YW	103	assert_se(CMP(UINT64_MAX, (uint64_t) 0) == 1);
ef6e83f0 YW	104	assert_se(CMP((uint64_t) 0, UINT64_MAX) == -1);
84fb2131 FB	105	assert_se(CMP(UINT64_MAX, UINT64_MAX) == 0);
	106	assert_se(CMP(INT64_MIN, INT64_MAX) == -1);
	107	assert_se(CMP(INT64_MAX, INT64_MIN) == 1);
	108	assert_se(CMP(INT64_MAX, INT64_MAX) == 0);
	109	assert_se(CMP(INT64_MIN, INT64_MIN) == 0);
ef6e83f0 YW	110	assert_se(CMP(INT64_MAX, (int64_t) 0) == 1);
	111	assert_se(CMP((int64_t) 0, INT64_MIN) == 1);
	112	assert_se(CMP(INT64_MIN, (int64_t) 0) == -1);
	113	assert_se(CMP((int64_t) 0, INT64_MAX) == -1);
84fb2131 FB	114	assert_se(CMP(&str[2], &str[7]) == -1);
	115	assert_se(CMP(&str[2], &str[2]) == 0);
	116	assert_se(CMP(&str[7], (const char *)str) == 1);
	117	assert_se(CMP(str[2], str[7]) == 1);
	118	assert_se(CMP(str[7], *str) == 1);
	119	assert_se(CMP((const unsigned long long *)arr, &arr[3]) == -1);
	120	assert_se(CMP(*arr, arr[3]) == 1);
	121	assert_se(CMP(p, q) == -1);
	122	assert_se(CMP(q, p) == 1);
	123	assert_se(CMP(p, p) == 0);
	124	assert_se(CMP(q, q) == 0);
667a0377 DH	125	assert_se(CLAMP(-5, 0, 1) == 0);
	126	assert_se(CLAMP(5, 0, 1) == 1);
	127	assert_se(CLAMP(5, -10, 1) == 1);
	128	assert_se(CLAMP(5, -10, 10) == 5);
	129	assert_se(CLAMP(CLAMP(0, -10, 10), CLAMP(-5, 10, 20), CLAMP(100, -5, 20)) == 10);
7242d742 DH	130	}
7242d742 DH	131
09571e3f ZJS	132	#pragma GCC diagnostic push
	133	#ifdef __clang__
	134	# pragma GCC diagnostic ignored "-Waddress-of-packed-member"
	135	#endif
	136
fb835651 DH	137	static void test_container_of(void) {
	138	struct mytype {
	139	uint8_t pad1[3];
	140	uint64_t v1;
	141	uint8_t pad2[2];
	142	uint32_t v2;
6b68c268	143	} myval = { };
fb835651	144
09c984c6 ZJS	145	log_info("/* %s */", __func__);
09c984c6 ZJS	146
6b68c268	147	assert_cc(sizeof(myval) >= 17);
fb835651 DH	148	assert_se(container_of(&myval.v1, struct mytype, v1) == &myval);
	149	assert_se(container_of(&myval.v2, struct mytype, v2) == &myval);
	150	assert_se(container_of(&container_of(&myval.v2,
	151	struct mytype,
	152	v2)->v1,
	153	struct mytype,
	154	v1) == &myval);
	155	}
	156
09571e3f ZJS	157	#pragma GCC diagnostic pop
09571e3f ZJS	158
180a60bc DH	159	static void test_div_round_up(void) {
	160	int div;
	161
09c984c6 ZJS	162	log_info("/* %s */", __func__);
09c984c6 ZJS	163
180a60bc DH	164	/* basic tests */
	165	assert_se(DIV_ROUND_UP(0, 8) == 0);
	166	assert_se(DIV_ROUND_UP(1, 8) == 1);
	167	assert_se(DIV_ROUND_UP(8, 8) == 1);
	168	assert_se(DIV_ROUND_UP(12, 8) == 2);
	169	assert_se(DIV_ROUND_UP(16, 8) == 2);
	170
	171	/* test multiple evaluation */
	172	div = 0;
	173	assert_se(DIV_ROUND_UP(div++, 8) == 0 && div == 1);
	174	assert_se(DIV_ROUND_UP(++div, 8) == 1 && div == 2);
	175	assert_se(DIV_ROUND_UP(8, div++) == 4 && div == 3);
	176	assert_se(DIV_ROUND_UP(8, ++div) == 2 && div == 4);
	177
	178	/* overflow test with exact division */
	179	assert_se(sizeof(0U) == 4);
	180	assert_se(0xfffffffaU % 10U == 0U);
	181	assert_se(0xfffffffaU / 10U == 429496729U);
	182	assert_se(DIV_ROUND_UP(0xfffffffaU, 10U) == 429496729U);
	183	assert_se((0xfffffffaU + 10U - 1U) / 10U == 0U);
	184	assert_se(0xfffffffaU / 10U + !!(0xfffffffaU % 10U) == 429496729U);
	185
	186	/* overflow test with rounded division */
	187	assert_se(0xfffffffdU % 10U == 3U);
	188	assert_se(0xfffffffdU / 10U == 429496729U);
	189	assert_se(DIV_ROUND_UP(0xfffffffdU, 10U) == 429496730U);
	190	assert_se((0xfffffffdU + 10U - 1U) / 10U == 0U);
	191	assert_se(0xfffffffdU / 10U + !!(0xfffffffdU % 10U) == 429496730U);
	192	}
	193
144e51ec	194	static void test_u64log2(void) {
09c984c6 ZJS	195	log_info("/* %s */", __func__);
09c984c6 ZJS	196
bdf7026e TA	197	assert_se(u64log2(0) == 0);
	198	assert_se(u64log2(8) == 3);
	199	assert_se(u64log2(9) == 3);
	200	assert_se(u64log2(15) == 3);
	201	assert_se(u64log2(16) == 4);
	202	assert_se(u64log2(1024*1024) == 20);
	203	assert_se(u64log2(1024*1024+5) == 20);
144e51ec CR	204	}
144e51ec CR	205
2a371001	206	static void test_protect_errno(void) {
09c984c6 ZJS	207	log_info("/* %s */", __func__);
09c984c6 ZJS	208
2a371001 ZJS	209	errno = 12;
	210	{
	211	PROTECT_ERRNO;
	212	errno = 11;
	213	}
bdf7026e	214	assert_se(errno == 12);
2a371001 ZJS	215	}
2a371001 ZJS	216
840f606d LP	217	static void test_unprotect_errno_inner_function(void) {
	218	PROTECT_ERRNO;
	219
	220	errno = 2222;
	221	}
	222
	223	static void test_unprotect_errno(void) {
	224	log_info("/* %s */", __func__);
	225
	226	errno = 4711;
	227
	228	PROTECT_ERRNO;
	229
	230	errno = 815;
	231
	232	UNPROTECT_ERRNO;
	233
	234	assert_se(errno == 4711);
	235
	236	test_unprotect_errno_inner_function();
	237
	238	assert_se(errno == 4711);
	239	}
	240
cabb7806	241	static void test_in_set(void) {
09c984c6 ZJS	242	log_info("/* %s */", __func__);
09c984c6 ZJS	243
cabb7806 LP	244	assert_se(IN_SET(1, 1));
	245	assert_se(IN_SET(1, 1, 2, 3, 4));
	246	assert_se(IN_SET(2, 1, 2, 3, 4));
	247	assert_se(IN_SET(3, 1, 2, 3, 4));
	248	assert_se(IN_SET(4, 1, 2, 3, 4));
	249	assert_se(!IN_SET(0, 1));
	250	assert_se(!IN_SET(0, 1, 2, 3, 4));
	251	}
	252
8fe90522	253	static void test_log2i(void) {
09c984c6 ZJS	254	log_info("/* %s */", __func__);
09c984c6 ZJS	255
8fe90522 ZJS	256	assert_se(log2i(1) == 0);
	257	assert_se(log2i(2) == 1);
	258	assert_se(log2i(3) == 1);
	259	assert_se(log2i(4) == 2);
	260	assert_se(log2i(32) == 5);
	261	assert_se(log2i(33) == 5);
	262	assert_se(log2i(63) == 5);
	263	assert_se(log2i(INT_MAX) == sizeof(int)*8-2);
	264	}
	265
7f6bfc56 ZJS	266	static void test_eqzero(void) {
	267	const uint32_t zeros[] = {0, 0, 0};
	268	const uint32_t ones[] = {1, 1};
	269	const uint32_t mixed[] = {0, 1, 0, 0, 0};
	270	const uint8_t longer[] = {[55] = 255};
	271
	272	log_info("/* %s */", __func__);
	273
	274	assert_se(eqzero(zeros));
	275	assert_se(!eqzero(ones));
	276	assert_se(!eqzero(mixed));
	277	assert_se(!eqzero(longer));
	278	}
	279
ee05e779 ZJS	280	static void test_raw_clone(void) {
	281	pid_t parent, pid, pid2;
	282
09c984c6 ZJS	283	log_info("/* %s */", __func__);
09c984c6 ZJS	284
ee05e779 ZJS	285	parent = getpid();
	286	log_info("before clone: getpid()→"PID_FMT, parent);
	287	assert_se(raw_getpid() == parent);
	288
8869a0b4	289	pid = raw_clone(0);
e50221bf	290	assert_se(pid >= 0);
ee05e779 ZJS	291
	292	pid2 = raw_getpid();
	293	log_info("raw_clone: "PID_FMT" getpid()→"PID_FMT" raw_getpid()→"PID_FMT,
	294	pid, getpid(), pid2);
0289a5bc	295	if (pid == 0) {
e50221bf	296	assert_se(pid2 != parent);
0289a5bc FB	297	_exit(EXIT_SUCCESS);
	298	} else {
	299	int status;
	300
e50221bf	301	assert_se(pid2 == parent);
0289a5bc FB	302	waitpid(pid, &status, __WCLONE);
	303	assert_se(WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS);
	304	}
96f64eb5 MG	305
	306	errno = 0;
	307	assert_se(raw_clone(CLONE_FS\|CLONE_NEWNS) == -1);
	308	assert_se(errno == EINVAL);
ee05e779 ZJS	309	}
ee05e779 ZJS	310
d9ab2bcf LP	311	static void test_physical_memory(void) {
	312	uint64_t p;
	313	char buf[FORMAT_BYTES_MAX];
	314
09c984c6 ZJS	315	log_info("/* %s */", __func__);
09c984c6 ZJS	316
d9ab2bcf LP	317	p = physical_memory();
	318	assert_se(p > 0);
	319	assert_se(p < UINT64_MAX);
	320	assert_se(p % page_size() == 0);
	321
d8cf2ac7 LP	322	log_info("Memory: %s (%" PRIu64 ")", format_bytes(buf, sizeof(buf), p), p);
	323	}
	324
	325	static void test_physical_memory_scale(void) {
	326	uint64_t p;
	327
09c984c6 ZJS	328	log_info("/* %s */", __func__);
09c984c6 ZJS	329
d8cf2ac7 LP	330	p = physical_memory();
	331
	332	assert_se(physical_memory_scale(0, 100) == 0);
	333	assert_se(physical_memory_scale(100, 100) == p);
	334
	335	log_info("Memory original: %" PRIu64, physical_memory());
	336	log_info("Memory scaled by 50%%: %" PRIu64, physical_memory_scale(50, 100));
	337	log_info("Memory divided by 2: %" PRIu64, physical_memory() / 2);
	338	log_info("Page size: %zu", page_size());
	339
	340	/* There might be an uneven number of pages, hence permit these calculations to be half a page off... */
	341	assert_se(page_size()/2 + physical_memory_scale(50, 100) - p/2 <= page_size());
	342	assert_se(physical_memory_scale(200, 100) == p*2);
	343
	344	assert_se(physical_memory_scale(0, 1) == 0);
	345	assert_se(physical_memory_scale(1, 1) == p);
	346	assert_se(physical_memory_scale(2, 1) == p*2);
	347
	348	assert_se(physical_memory_scale(0, 2) == 0);
	349
	350	assert_se(page_size()/2 + physical_memory_scale(1, 2) - p/2 <= page_size());
	351	assert_se(physical_memory_scale(2, 2) == p);
	352	assert_se(physical_memory_scale(4, 2) == p*2);
	353
	354	assert_se(physical_memory_scale(0, UINT32_MAX) == 0);
	355	assert_se(physical_memory_scale(UINT32_MAX, UINT32_MAX) == p);
	356
	357	/* overflow */
	358	assert_se(physical_memory_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
83f8e808 LP	359	}
	360
	361	static void test_system_tasks_max(void) {
	362	uint64_t t;
	363
09c984c6 ZJS	364	log_info("/* %s */", __func__);
09c984c6 ZJS	365
83f8e808 LP	366	t = system_tasks_max();
	367	assert_se(t > 0);
	368	assert_se(t < UINT64_MAX);
	369
	370	log_info("Max tasks: %" PRIu64, t);
	371	}
	372
	373	static void test_system_tasks_max_scale(void) {
	374	uint64_t t;
	375
09c984c6 ZJS	376	log_info("/* %s */", __func__);
09c984c6 ZJS	377
83f8e808 LP	378	t = system_tasks_max();
	379
	380	assert_se(system_tasks_max_scale(0, 100) == 0);
	381	assert_se(system_tasks_max_scale(100, 100) == t);
	382
	383	assert_se(system_tasks_max_scale(0, 1) == 0);
	384	assert_se(system_tasks_max_scale(1, 1) == t);
	385	assert_se(system_tasks_max_scale(2, 1) == 2*t);
	386
	387	assert_se(system_tasks_max_scale(0, 2) == 0);
	388	assert_se(system_tasks_max_scale(1, 2) == t/2);
	389	assert_se(system_tasks_max_scale(2, 2) == t);
	390	assert_se(system_tasks_max_scale(3, 2) == (3*t)/2);
	391	assert_se(system_tasks_max_scale(4, 2) == t*2);
	392
	393	assert_se(system_tasks_max_scale(0, UINT32_MAX) == 0);
	394	assert_se(system_tasks_max_scale((UINT32_MAX-1)/2, UINT32_MAX-1) == t/2);
	395	assert_se(system_tasks_max_scale(UINT32_MAX, UINT32_MAX) == t);
	396
	397	/* overflow */
d8cf2ac7	398
83f8e808	399	assert_se(system_tasks_max_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
d9ab2bcf LP	400	}
d9ab2bcf LP	401
539ad707	402	int main(int argc, char *argv[]) {
09c984c6	403	test_setup_logging(LOG_INFO);
9480794b	404
625e870b	405	test_align_power2();
7242d742	406	test_max();
fb835651	407	test_container_of();
180a60bc	408	test_div_round_up();
144e51ec	409	test_u64log2();
2a371001	410	test_protect_errno();
840f606d	411	test_unprotect_errno();
cabb7806	412	test_in_set();
8fe90522	413	test_log2i();
7f6bfc56	414	test_eqzero();
ee05e779	415	test_raw_clone();
d9ab2bcf	416	test_physical_memory();
d8cf2ac7	417	test_physical_memory_scale();
83f8e808 LP	418	test_system_tasks_max();
83f8e808 LP	419	test_system_tasks_max_scale();
539ad707 TA	420
	421	return 0;
	422	}