547 lines
18 KiB
C++
547 lines
18 KiB
C++
#include "catch.hpp"
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#include "multi_heap.h"
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#include "../multi_heap_config.h"
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#include <string.h>
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#include <assert.h>
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/* Insurance against accidentally using libc heap functions in tests */
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#undef free
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#define free #error
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#undef malloc
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#define malloc #error
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#undef calloc
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#define calloc #error
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#undef realloc
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#define realloc #error
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TEST_CASE("multi_heap simple allocations", "[multi_heap]")
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{
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uint8_t small_heap[128];
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multi_heap_handle_t heap = multi_heap_register(small_heap, sizeof(small_heap));
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size_t test_alloc_size = (multi_heap_free_size(heap) + 4) / 2;
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printf("New heap:\n");
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multi_heap_dump(heap);
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printf("*********************\n");
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uint8_t *buf = (uint8_t *)multi_heap_malloc(heap, test_alloc_size);
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printf("small_heap %p buf %p\n", small_heap, buf);
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REQUIRE( buf != NULL );
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REQUIRE((intptr_t)buf >= (intptr_t)small_heap);
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REQUIRE( (intptr_t)buf < (intptr_t)(small_heap + sizeof(small_heap)));
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REQUIRE( multi_heap_get_allocated_size(heap, buf) >= test_alloc_size );
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REQUIRE( multi_heap_get_allocated_size(heap, buf) < test_alloc_size + 16);
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memset(buf, 0xEE, test_alloc_size);
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REQUIRE( multi_heap_malloc(heap, test_alloc_size) == NULL );
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multi_heap_free(heap, buf);
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printf("Empty?\n");
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multi_heap_dump(heap);
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printf("*********************\n");
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/* Now there should be space for another allocation */
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buf = (uint8_t *)multi_heap_malloc(heap, test_alloc_size);
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REQUIRE( buf != NULL );
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multi_heap_free(heap, buf);
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REQUIRE( multi_heap_free_size(heap) > multi_heap_minimum_free_size(heap) );
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}
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TEST_CASE("multi_heap fragmentation", "[multi_heap]")
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{
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uint8_t small_heap[256];
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multi_heap_handle_t heap = multi_heap_register(small_heap, sizeof(small_heap));
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const size_t alloc_size = 24;
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void *p[4];
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for (int i = 0; i < 4; i++) {
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multi_heap_dump(heap);
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REQUIRE( multi_heap_check(heap, true) );
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p[i] = multi_heap_malloc(heap, alloc_size);
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printf("%d = %p ****->\n", i, p[i]);
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multi_heap_dump(heap);
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REQUIRE( p[i] != NULL );
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}
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printf("allocated %p %p %p %p\n", p[0], p[1], p[2], p[3]);
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REQUIRE( multi_heap_malloc(heap, alloc_size * 5) == NULL ); /* no room to allocate 5*alloc_size now */
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printf("4 allocations:\n");
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multi_heap_dump(heap);
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printf("****************\n");
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multi_heap_free(heap, p[0]);
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multi_heap_free(heap, p[1]);
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multi_heap_free(heap, p[3]);
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printf("1 allocations:\n");
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multi_heap_dump(heap);
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printf("****************\n");
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void *big = multi_heap_malloc(heap, alloc_size * 3);
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REQUIRE( p[3] == big ); /* big should go where p[3] was freed from */
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multi_heap_free(heap, big);
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multi_heap_free(heap, p[2]);
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printf("0 allocations:\n");
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multi_heap_dump(heap);
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printf("****************\n");
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big = multi_heap_malloc(heap, alloc_size * 2);
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REQUIRE( p[0] == big ); /* big should now go where p[0] was freed from */
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multi_heap_free(heap, big);
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}
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/* Test that malloc/free does not leave free space fragmented */
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TEST_CASE("multi_heap defrag", "[multi_heap]")
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{
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void *p[4];
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uint8_t small_heap[512];
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multi_heap_info_t info, info2;
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multi_heap_handle_t heap = multi_heap_register(small_heap, sizeof(small_heap));
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printf("0 ---\n");
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multi_heap_dump(heap);
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REQUIRE( multi_heap_check(heap, true) );
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multi_heap_get_info(heap, &info);
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REQUIRE( 0 == info.allocated_blocks );
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REQUIRE( 1 == info.free_blocks );
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printf("1 ---\n");
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p[0] = multi_heap_malloc(heap, 128);
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p[1] = multi_heap_malloc(heap, 32);
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multi_heap_dump(heap);
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REQUIRE( multi_heap_check(heap, true) );
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printf("2 ---\n");
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multi_heap_free(heap, p[0]);
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p[2] = multi_heap_malloc(heap, 64);
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multi_heap_dump(heap);
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REQUIRE( p[2] == p[0] );
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REQUIRE( multi_heap_check(heap, true) );
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printf("3 ---\n");
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multi_heap_free(heap, p[2]);
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p[3] = multi_heap_malloc(heap, 32);
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multi_heap_dump(heap);
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REQUIRE( p[3] == p[0] );
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REQUIRE( multi_heap_check(heap, true) );
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multi_heap_get_info(heap, &info2);
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REQUIRE( 2 == info2.allocated_blocks );
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REQUIRE( 2 == info2.free_blocks );
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multi_heap_free(heap, p[0]);
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multi_heap_free(heap, p[1]);
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multi_heap_get_info(heap, &info2);
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REQUIRE( 0 == info2.allocated_blocks );
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REQUIRE( 1 == info2.free_blocks );
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REQUIRE( info.total_free_bytes == info2.total_free_bytes );
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}
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/* Test that malloc/free does not leave free space fragmented
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Note: With fancy poisoning, realloc is implemented as malloc-copy-free and this test does not apply.
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*/
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#ifndef MULTI_HEAP_POISONING_SLOW
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TEST_CASE("multi_heap defrag realloc", "[multi_heap]")
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{
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void *p[4];
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uint8_t small_heap[512];
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multi_heap_info_t info, info2;
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multi_heap_handle_t heap = multi_heap_register(small_heap, sizeof(small_heap));
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printf("0 ---\n");
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multi_heap_dump(heap);
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REQUIRE( multi_heap_check(heap, true) );
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multi_heap_get_info(heap, &info);
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REQUIRE( 0 == info.allocated_blocks );
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REQUIRE( 1 == info.free_blocks );
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printf("1 ---\n");
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p[0] = multi_heap_malloc(heap, 128);
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p[1] = multi_heap_malloc(heap, 32);
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multi_heap_dump(heap);
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REQUIRE( multi_heap_check(heap, true) );
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printf("2 ---\n");
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p[2] = multi_heap_realloc(heap, p[0], 64);
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multi_heap_dump(heap);
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REQUIRE( p[2] == p[0] );
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REQUIRE( multi_heap_check(heap, true) );
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printf("3 ---\n");
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p[3] = multi_heap_realloc(heap, p[2], 32);
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multi_heap_dump(heap);
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REQUIRE( p[3] == p[0] );
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REQUIRE( multi_heap_check(heap, true) );
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multi_heap_get_info(heap, &info2);
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REQUIRE( 2 == info2.allocated_blocks );
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REQUIRE( 2 == info2.free_blocks );
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multi_heap_free(heap, p[0]);
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multi_heap_free(heap, p[1]);
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multi_heap_get_info(heap, &info2);
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REQUIRE( 0 == info2.allocated_blocks );
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REQUIRE( 1 == info2.free_blocks );
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REQUIRE( info.total_free_bytes == info2.total_free_bytes );
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}
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#endif
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TEST_CASE("multi_heap many random allocations", "[multi_heap]")
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{
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uint8_t big_heap[1024];
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const int NUM_POINTERS = 64;
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printf("Running multi-allocation test...\n");
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void *p[NUM_POINTERS] = { 0 };
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size_t s[NUM_POINTERS] = { 0 };
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multi_heap_handle_t heap = multi_heap_register(big_heap, sizeof(big_heap));
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const size_t initial_free = multi_heap_free_size(heap);
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const int ITERATIONS = 100000;
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for (int i = 0; i < ITERATIONS; i++) {
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/* check all pointers allocated so far are valid inside big_heap */
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for (int j = 0; j < NUM_POINTERS; j++) {
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if (p[j] != NULL) {
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}
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}
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uint8_t n = rand() % NUM_POINTERS;
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if (rand() % 4 == 0) {
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/* 1 in 4 iterations, try to realloc the buffer instead
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of using malloc/free
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*/
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size_t new_size = rand() % 1024;
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void *new_p = multi_heap_realloc(heap, p[n], new_size);
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printf("realloc %p -> %p (%zu -> %zu)\n", p[n], new_p, s[n], new_size);
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multi_heap_check(heap, true);
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if (new_size == 0 || new_p != NULL) {
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p[n] = new_p;
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s[n] = new_size;
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if (new_size > 0) {
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REQUIRE( p[n] >= big_heap );
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REQUIRE( p[n] < big_heap + sizeof(big_heap) );
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memset(p[n], n, new_size);
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}
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}
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continue;
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}
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if (p[n] != NULL) {
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if (s[n] > 0) {
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/* Verify pre-existing contents of p[n] */
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uint8_t compare[s[n]];
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memset(compare, n, s[n]);
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/*REQUIRE*/assert( memcmp(compare, p[n], s[n]) == 0 );
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}
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REQUIRE( multi_heap_check(heap, true) );
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multi_heap_free(heap, p[n]);
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printf("freed %p (%zu)\n", p[n], s[n]);
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if (!multi_heap_check(heap, true)) {
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printf("FAILED iteration %d after freeing %p\n", i, p[n]);
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multi_heap_dump(heap);
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REQUIRE(0);
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}
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}
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s[n] = rand() % 1024;
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REQUIRE( multi_heap_check(heap, true) );
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p[n] = multi_heap_malloc(heap, s[n]);
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printf("malloc %p (%zu)\n", p[n], s[n]);
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if (p[n] != NULL) {
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REQUIRE( p[n] >= big_heap );
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REQUIRE( p[n] < big_heap + sizeof(big_heap) );
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}
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if (!multi_heap_check(heap, true)) {
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printf("FAILED iteration %d after mallocing %p (%zu bytes)\n", i, p[n], s[n]);
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multi_heap_dump(heap);
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REQUIRE(0);
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}
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if (p[n] != NULL) {
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memset(p[n], n, s[n]);
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}
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}
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for (int i = 0; i < NUM_POINTERS; i++) {
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multi_heap_free(heap, p[i]);
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if (!multi_heap_check(heap, true)) {
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printf("FAILED during cleanup after freeing %p\n", p[i]);
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multi_heap_dump(heap);
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REQUIRE(0);
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}
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}
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REQUIRE( initial_free == multi_heap_free_size(heap) );
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}
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TEST_CASE("multi_heap_get_info() function", "[multi_heap]")
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{
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uint8_t heapdata[256];
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multi_heap_handle_t heap = multi_heap_register(heapdata, sizeof(heapdata));
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multi_heap_info_t before, after, freed;
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multi_heap_get_info(heap, &before);
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printf("before: total_free_bytes %zu\ntotal_allocated_bytes %zu\nlargest_free_block %zu\nminimum_free_bytes %zu\nallocated_blocks %zu\nfree_blocks %zu\ntotal_blocks %zu\n",
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before.total_free_bytes,
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before.total_allocated_bytes,
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before.largest_free_block,
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before.minimum_free_bytes,
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before.allocated_blocks,
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before.free_blocks,
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before.total_blocks);
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REQUIRE( 0 == before.allocated_blocks );
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REQUIRE( 0 == before.total_allocated_bytes );
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REQUIRE( before.total_free_bytes == before.minimum_free_bytes );
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void *x = multi_heap_malloc(heap, 32);
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multi_heap_get_info(heap, &after);
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printf("after: total_free_bytes %zu\ntotal_allocated_bytes %zu\nlargest_free_block %zu\nminimum_free_bytes %zu\nallocated_blocks %zu\nfree_blocks %zu\ntotal_blocks %zu\n",
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after.total_free_bytes,
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after.total_allocated_bytes,
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after.largest_free_block,
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after.minimum_free_bytes,
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after.allocated_blocks,
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after.free_blocks,
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after.total_blocks);
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REQUIRE( 1 == after.allocated_blocks );
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REQUIRE( 32 == after.total_allocated_bytes );
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REQUIRE( after.minimum_free_bytes < before.minimum_free_bytes);
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REQUIRE( after.minimum_free_bytes > 0 );
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multi_heap_free(heap, x);
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multi_heap_get_info(heap, &freed);
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printf("freed: total_free_bytes %zu\ntotal_allocated_bytes %zu\nlargest_free_block %zu\nminimum_free_bytes %zu\nallocated_blocks %zu\nfree_blocks %zu\ntotal_blocks %zu\n",
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freed.total_free_bytes,
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freed.total_allocated_bytes,
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freed.largest_free_block,
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freed.minimum_free_bytes,
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freed.allocated_blocks,
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freed.free_blocks,
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freed.total_blocks);
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REQUIRE( 0 == freed.allocated_blocks );
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REQUIRE( 0 == freed.total_allocated_bytes );
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REQUIRE( before.total_free_bytes == freed.total_free_bytes );
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REQUIRE( after.minimum_free_bytes == freed.minimum_free_bytes );
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}
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TEST_CASE("multi_heap minimum-size allocations", "[multi_heap]")
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{
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uint8_t heapdata[16384];
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void *p[sizeof(heapdata) / sizeof(void *)];
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const size_t NUM_P = sizeof(p) / sizeof(void *);
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multi_heap_handle_t heap = multi_heap_register(heapdata, sizeof(heapdata));
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size_t before_free = multi_heap_free_size(heap);
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size_t i;
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for (i = 0; i < NUM_P; i++) {
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p[i] = multi_heap_malloc(heap, 1);
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if (p[i] == NULL) {
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break;
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}
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}
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REQUIRE( i < NUM_P); // Should have run out of heap before we ran out of pointers
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printf("Allocated %zu minimum size chunks\n", i);
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REQUIRE( 0 == multi_heap_free_size(heap) );
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multi_heap_check(heap, true);
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/* Free in random order */
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bool has_allocations = true;
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while (has_allocations) {
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i = rand() % NUM_P;
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multi_heap_free(heap, p[i]);
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p[i] = NULL;
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multi_heap_check(heap, true);
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has_allocations = false;
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for (i = 0; i < NUM_P && !has_allocations; i++) {
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has_allocations = (p[i] != NULL);
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}
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}
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/* all freed! */
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REQUIRE( before_free == multi_heap_free_size(heap) );
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}
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TEST_CASE("multi_heap_realloc()", "[multi_heap]")
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{
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const uint32_t PATTERN = 0xABABDADA;
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uint8_t small_heap[300];
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multi_heap_handle_t heap = multi_heap_register(small_heap, sizeof(small_heap));
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uint32_t *a = (uint32_t *)multi_heap_malloc(heap, 64);
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uint32_t *b = (uint32_t *)multi_heap_malloc(heap, 32);
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REQUIRE( a != NULL );
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REQUIRE( b != NULL );
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REQUIRE( b > a); /* 'b' takes the block after 'a' */
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*a = PATTERN;
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uint32_t *c = (uint32_t *)multi_heap_realloc(heap, a, 72);
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REQUIRE( multi_heap_check(heap, true));
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REQUIRE( c != NULL );
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REQUIRE( c > b ); /* 'a' moves, 'c' takes the block after 'b' */
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REQUIRE( *c == PATTERN );
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#ifndef MULTI_HEAP_POISONING_SLOW
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// "Slow" poisoning implementation doesn't reallocate in place, so these
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// test will fail...
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uint32_t *d = (uint32_t *)multi_heap_realloc(heap, c, 36);
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REQUIRE( multi_heap_check(heap, true) );
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REQUIRE( c == d ); /* 'c' block should be shrunk in-place */
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REQUIRE( *d == PATTERN);
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uint32_t *e = (uint32_t *)multi_heap_malloc(heap, 64);
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REQUIRE( multi_heap_check(heap, true));
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REQUIRE( a == e ); /* 'e' takes the block formerly occupied by 'a' */
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multi_heap_free(heap, d);
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uint32_t *f = (uint32_t *)multi_heap_realloc(heap, b, 64);
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REQUIRE( multi_heap_check(heap, true) );
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REQUIRE( f == b ); /* 'b' should be extended in-place, over space formerly occupied by 'd' */
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#ifdef MULTI_HEAP_POISONING
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#define TOO_MUCH 92 + 1
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#else
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#define TOO_MUCH 128 + 1
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#endif
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/* not enough contiguous space left in the heap */
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uint32_t *g = (uint32_t *)multi_heap_realloc(heap, e, TOO_MUCH);
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REQUIRE( g == NULL );
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multi_heap_free(heap, f);
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/* try again */
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g = (uint32_t *)multi_heap_realloc(heap, e, 128);
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REQUIRE( multi_heap_check(heap, true) );
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REQUIRE( e == g ); /* 'g' extends 'e' in place, into the space formerly held by 'f' */
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#endif
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}
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TEST_CASE("corrupt heap block", "[multi_heap]")
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{
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uint8_t small_heap[256];
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multi_heap_handle_t heap = multi_heap_register(small_heap, sizeof(small_heap));
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void *a = multi_heap_malloc(heap, 32);
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REQUIRE( multi_heap_check(heap, true) );
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memset(a, 0xEE, 64);
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REQUIRE( !multi_heap_check(heap, true) );
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}
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TEST_CASE("unaligned heaps", "[multi_heap]")
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{
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const size_t CHUNK_LEN = 256;
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const size_t CANARY_LEN = 16;
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const uint8_t CANARY_BYTE = 0x3E;
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uint8_t heap_chunk[CHUNK_LEN + CANARY_LEN * 2];
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/* Put some canary bytes before and after the bytes we intend to use for
|
|
the heap, make sure they aren't ever overwritten */
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|
memset(heap_chunk, CANARY_BYTE, CANARY_LEN);
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|
memset(heap_chunk + CANARY_LEN + CHUNK_LEN, CANARY_BYTE, CANARY_LEN);
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|
|
|
for (int i = 0; i < 8; i++) {
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|
printf("Testing with offset %d\n", i);
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|
multi_heap_handle_t heap = multi_heap_register(heap_chunk + CANARY_LEN + i, CHUNK_LEN - i);
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|
multi_heap_info_t info;
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|
|
|
REQUIRE( multi_heap_check(heap, true) );
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|
|
|
multi_heap_get_info(heap, &info);
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|
|
|
REQUIRE( info.total_free_bytes > CHUNK_LEN - 64 - i );
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|
REQUIRE( info.largest_free_block > CHUNK_LEN - 64 - i );
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|
|
|
void *a = multi_heap_malloc(heap, info.largest_free_block);
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|
REQUIRE( a != NULL );
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|
memset(a, 0xAA, info.largest_free_block);
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|
|
|
REQUIRE( multi_heap_check(heap, true) );
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|
|
|
multi_heap_free(heap, a);
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|
|
|
REQUIRE( multi_heap_check(heap, true) );
|
|
|
|
for (unsigned j = 0; j < CANARY_LEN; j++) { // check canaries
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|
REQUIRE( heap_chunk[j] == CANARY_BYTE );
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|
REQUIRE( heap_chunk[CHUNK_LEN + CANARY_LEN + j] == CANARY_BYTE );
|
|
}
|
|
}
|
|
}
|
|
|
|
TEST_CASE("multi_heap aligned allocations", "[multi_heap]")
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|
{
|
|
uint8_t test_heap[1024 * 1024];
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|
multi_heap_handle_t heap = multi_heap_register(test_heap, sizeof(test_heap));
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|
uint32_t aligments = 0; // starts from alignment by 4-byte boundary
|
|
size_t old_size = multi_heap_free_size(heap);
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|
size_t leakage = 1024;
|
|
printf("[ALIGNED_ALLOC] heap_size before: %d \n", old_size);
|
|
|
|
printf("New heap:\n");
|
|
multi_heap_dump(heap);
|
|
printf("*********************\n");
|
|
|
|
for(;aligments < 500 * 1024; aligments++) {
|
|
|
|
//Use some stupid size value to test correct alignment even in strange
|
|
//memory layout objects:
|
|
uint8_t *buf = (uint8_t *)multi_heap_aligned_alloc(heap, (aligments + 137), aligments );
|
|
if(((aligments & (aligments - 1)) != 0) || (!aligments)) {
|
|
REQUIRE( buf == NULL );
|
|
//printf("[ALIGNED_ALLOC] alignment: %u is not a power of two, don't allow allocation \n", aligments);
|
|
} else {
|
|
REQUIRE( buf != NULL );
|
|
REQUIRE((intptr_t)buf >= (intptr_t)test_heap);
|
|
REQUIRE((intptr_t)buf < (intptr_t)(test_heap + sizeof(test_heap)));
|
|
|
|
printf("[ALIGNED_ALLOC] alignment required: %u \n", aligments);
|
|
//printf("[ALIGNED_ALLOC] allocated size: %d \n", multi_heap_get_allocated_size(heap, buf));
|
|
printf("[ALIGNED_ALLOC] address of allocated memory: %p \n\n", (void *)buf);
|
|
//Address of obtained block must be aligned with selected value
|
|
|
|
if((aligments & 0x03) == 0) {
|
|
//Alignment is a multiple of four:
|
|
REQUIRE(((intptr_t)buf & 0x03) == 0);
|
|
} else {
|
|
//Exotic alignments:
|
|
REQUIRE(((intptr_t)buf & (aligments - 1)) == 0);
|
|
}
|
|
|
|
//Write some data, if it corrupts memory probably the heap
|
|
//canary verification will fail:
|
|
memset(buf, 0xA5, (aligments + 137));
|
|
|
|
multi_heap_aligned_free(heap, buf);
|
|
}
|
|
}
|
|
|
|
printf("[ALIGNED_ALLOC] heap_size after: %d \n", multi_heap_free_size(heap));
|
|
REQUIRE((old_size - multi_heap_free_size(heap)) <= leakage);
|
|
} |