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Diffstat (limited to 'src/test/test-util.c')
| -rw-r--r-- | src/test/test-util.c | 421 |
1 files changed, 421 insertions, 0 deletions
diff --git a/src/test/test-util.c b/src/test/test-util.c new file mode 100644 index 0000000..ffacd65 --- /dev/null +++ b/src/test/test-util.c @@ -0,0 +1,421 @@ +/* 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; + } 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; +} |