101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
#include "../minunit.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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// this test is not accurate, but gives a basic understanding
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// that memory management is working fine
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// do not include memmgr.h here
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// we also test that we are linking against stdlib
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extern size_t memmgr_get_free_heap(void);
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extern size_t memmgr_get_minimum_free_heap(void);
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// current heap management realization consume:
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// X bytes after allocate and 0 bytes after allocate and free,
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// where X = sizeof(void*) + sizeof(size_t), look to BlockLink_t
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const size_t heap_overhead_max_size = sizeof(void*) + sizeof(size_t);
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bool heap_equal(size_t heap_size, size_t heap_size_old) {
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// heap borders with overhead
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const size_t heap_low = heap_size_old - heap_overhead_max_size;
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const size_t heap_high = heap_size_old + heap_overhead_max_size;
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// not exact, so we must test it against bigger numbers than "overhead size"
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const bool result = ((heap_size >= heap_low) && (heap_size <= heap_high));
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// debug allocation info
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if(!result) {
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printf("\n(hl: %zu) <= (p: %zu) <= (hh: %zu)\n", heap_low, heap_size, heap_high);
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}
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return result;
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}
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void test_furi_memmgr() {
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size_t heap_size = 0;
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size_t heap_size_old = 0;
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const int alloc_size = 128;
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void* ptr = NULL;
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void* original_ptr = NULL;
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// do not include furi memmgr.h case
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#ifdef FURI_MEMMGR_GUARD
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mu_fail("do not link against furi memmgr.h");
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#endif
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// allocate memory case
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heap_size_old = memmgr_get_free_heap();
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ptr = malloc(alloc_size);
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heap_size = memmgr_get_free_heap();
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mu_assert_pointers_not_eq(ptr, NULL);
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mu_assert(heap_equal(heap_size, heap_size_old - alloc_size), "allocate failed");
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// free memory case
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heap_size_old = memmgr_get_free_heap();
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free(ptr);
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ptr = NULL;
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heap_size = memmgr_get_free_heap();
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mu_assert(heap_equal(heap_size, heap_size_old + alloc_size), "free failed");
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// reallocate memory case
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// get filled array with some data
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original_ptr = malloc(alloc_size);
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mu_assert_pointers_not_eq(original_ptr, NULL);
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for(int i = 0; i < alloc_size; i++) {
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*(unsigned char*)(original_ptr + i) = i;
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}
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// malloc array and copy data
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ptr = malloc(alloc_size);
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mu_assert_pointers_not_eq(ptr, NULL);
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memcpy(ptr, original_ptr, alloc_size);
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// reallocate array
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heap_size_old = memmgr_get_free_heap();
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ptr = realloc(ptr, alloc_size * 2);
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heap_size = memmgr_get_free_heap();
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mu_assert(heap_equal(heap_size, heap_size_old - alloc_size), "reallocate failed");
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mu_assert_int_eq(memcmp(original_ptr, ptr, alloc_size), 0);
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free(original_ptr);
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free(ptr);
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// allocate and zero-initialize array (calloc)
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original_ptr = malloc(alloc_size);
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mu_assert_pointers_not_eq(original_ptr, NULL);
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for(int i = 0; i < alloc_size; i++) {
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*(unsigned char*)(original_ptr + i) = 0;
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}
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heap_size_old = memmgr_get_free_heap();
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ptr = calloc(1, alloc_size);
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heap_size = memmgr_get_free_heap();
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mu_assert(heap_equal(heap_size, heap_size_old - alloc_size), "callocate failed");
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mu_assert_int_eq(memcmp(original_ptr, ptr, alloc_size), 0);
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free(original_ptr);
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free(ptr);
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}
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