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test.cpp
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test.cpp
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#include <catch2/catch_test_macros.hpp>
extern "C" {
#include "pog_static_heap.h"
}
TEST_CASE("Malloc 0 bytes") {
pog_static_heap_init();
REQUIRE(pog_malloc(0) == NULL);
}
static auto was_called = false;
TEST_CASE("Allocate static memory until the expand function is called") {
uintptr_t test_heap[3] = {0};
pog_chunk test_alloced[3] = {nullptr};
pog_chunk test_freed[3] = {nullptr};
pog_chunk test_tmp[3] = {nullptr};
pog_init(&test_heap[0], 2,
&test_alloced[0], 2,
&test_freed[0], 2,
&test_tmp[0], 2,
[](size_t words, size_t* alloced_chunks_size, size_t* freed_chunks_size) -> int {
REQUIRE(words == (size_t) 1);
(*alloced_chunks_size)++;
(*freed_chunks_size)++;
was_called = true;
return 0;
});
void* a = pog_malloc(1);
REQUIRE(test_alloced[0].size == (size_t) 1);
REQUIRE(test_freed[0].size == (size_t) 1);
void* b = pog_malloc(1);
REQUIRE(test_alloced[0].size == (size_t) 1);
REQUIRE(test_alloced[1].size == (size_t) 1);
void* c = pog_malloc(1);
REQUIRE(test_alloced[0].size == (size_t) 1);
REQUIRE(test_alloced[1].size == (size_t) 1);
REQUIRE(test_alloced[1].size == (size_t) 1);
REQUIRE(was_called);
}
TEST_CASE("Squash freed memory") {
pog_static_heap_init();
void* a = pog_malloc(1);
void* b = pog_malloc(1);
void* c = pog_malloc(1);
REQUIRE(a != b);
REQUIRE(b != c);
REQUIRE(a != c);
REQUIRE(freed[0].size == (size_t) 7997);
pog_free(a);
pog_free(b);
pog_free(c);
REQUIRE(freed[0].size == (size_t) 1);
REQUIRE(freed[1].size == (size_t) 1);
REQUIRE(freed[2].size == (size_t) 1);
REQUIRE(freed[3].size == (size_t) 7997);
pog_squash();
REQUIRE(freed[0].size == (size_t) 8000);
}
TEST_CASE("Realloc allocated memory") {
pog_static_heap_init();
void* a = pog_malloc(8);
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(freed[0].size == (size_t) 7999);
a = pog_realloc(a, 16);
REQUIRE(alloced[0].size == (size_t) 2);
REQUIRE(freed[0].size == (size_t) 1);
REQUIRE(freed[1].size == (size_t) 7997);
pog_squash();
REQUIRE(freed[0].size == (size_t) 1);
REQUIRE(freed[1].size == (size_t) 7997);
}
TEST_CASE("Allocate memory for string") {
pog_static_heap_init();
char *str;
/* Initial memory allocation */
str = (char *) pog_malloc(15);
strcpy(str, "tutorialspoint");
printf("String = %s, Address = %u\n", str, str);
/* Reallocating memory */
str = (char *) pog_realloc(str, 25);
strcat(str, ".com");
printf("String = %s, Address = %u\n", str, str);
pog_free(str);
}
TEST_CASE("GC unused stack pointer") {
pog_static_heap_init();
pog_gc_init(NULL, 0);
void* a = pog_malloc(1);
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(freed[0].size == (size_t) 7999);
pog_gc_collect();
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(freed[0].size == (size_t) 7999);
a = nullptr;
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(freed[0].size == (size_t) 7999);
pog_gc_collect();
REQUIRE(freed[0].size == (size_t) 1);
REQUIRE(freed[1].size == (size_t) 7999);
pog_squash();
REQUIRE(freed[0].size == (size_t) 8000);
}
TEST_CASE("GC multiple unused stack pointers") {
pog_static_heap_init();
pog_gc_init(NULL, 0);
void* a = pog_malloc(1);
void* b = pog_malloc(1);
void* c = pog_malloc(1);
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(alloced[1].size == (size_t) 1);
REQUIRE(alloced[2].size == (size_t) 1);
REQUIRE(freed[0].size == (size_t) 7997);
pog_gc_collect();
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(alloced[1].size == (size_t) 1);
REQUIRE(alloced[2].size == (size_t) 1);
REQUIRE(freed[0].size == (size_t) 7997);
a = nullptr;
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(freed[0].size == (size_t) 7997);
pog_gc_collect();
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(alloced[1].size == (size_t) 1);
REQUIRE(freed[0].size == (size_t) 1);
REQUIRE(freed[1].size == (size_t) 7997);
b = nullptr;
c = nullptr;
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(alloced[1].size == (size_t) 1);
pog_gc_collect();
REQUIRE(freed[0].size == (size_t) 1);
REQUIRE(freed[1].size == (size_t) 1);
REQUIRE(freed[2].size == (size_t) 1);
REQUIRE(freed[3].size == (size_t) 7997);
pog_squash();
REQUIRE(freed[0].size == (size_t) 8000);
}
TEST_CASE("GC pointers in heap without GC root") {
pog_static_heap_init();
pog_gc_init(NULL, 0);
struct LinkedList {
int val;
LinkedList* next;
};
auto a = (LinkedList*) pog_malloc(sizeof(LinkedList));
auto b = (LinkedList*) pog_malloc(sizeof(LinkedList));
auto c = (LinkedList*) pog_malloc(sizeof(LinkedList));
auto d = (LinkedList*) pog_malloc(sizeof(LinkedList));
a->val = 1;
a->next = b;
b->val = 2;
b->next = c;
c->val = 3;
c->next = d;
d->val = 4;
REQUIRE(alloced[0].size == (size_t) 2);
REQUIRE(alloced[1].size == (size_t) 2);
REQUIRE(alloced[2].size == (size_t) 2);
REQUIRE(alloced[3].size == (size_t) 2);
REQUIRE(freed[0].size == (size_t) 7992);
pog_gc_collect();
REQUIRE(alloced[0].size == (size_t) 2);
REQUIRE(alloced[1].size == (size_t) 2);
REQUIRE(alloced[2].size == (size_t) 2);
REQUIRE(alloced[3].size == (size_t) 2);
REQUIRE(freed[0].size == (size_t) 7992);
b->next = nullptr;
c = nullptr;
d = nullptr;
pog_gc_collect();
REQUIRE(alloced[0].size == (size_t) 2);
REQUIRE(alloced[1].size == (size_t) 2);
REQUIRE(freed[0].size == (size_t) 2);
REQUIRE(freed[1].size == (size_t) 2);
REQUIRE(freed[2].size == (size_t) 7992);
pog_squash();
REQUIRE(alloced[0].size == (size_t) 2);
REQUIRE(alloced[1].size == (size_t) 2);
REQUIRE(freed[0].size == (size_t) 7996);
a = nullptr;
b = nullptr;
pog_gc_collect();
REQUIRE(freed[0].size == (size_t) 2);
REQUIRE(freed[1].size == (size_t) 2);
REQUIRE(freed[2].size == (size_t) 7996);
pog_squash();
REQUIRE(freed[0].size == (size_t) 8000);
}
static char* x;
static char* y;
static char* z;
#define STATIC_MEM_CAP 2048
uintptr_t test_static_mem[STATIC_MEM_CAP];
TEST_CASE("GC static pointers that have been set to null") {
pog_gc_init(&test_static_mem, STATIC_MEM_CAP);
pog_gc_mark_static(&x);
pog_gc_mark_static(&y);
pog_gc_mark_static(&z);
pog_static_heap_init();
x = (char*) pog_malloc(1);
y = (char*) pog_malloc(1);
z = (char*) pog_malloc(1);
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(alloced[1].size == (size_t) 1);
REQUIRE(alloced[2].size == (size_t) 1);
REQUIRE(freed[0].size == (size_t) 7997);
pog_gc_collect();
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(alloced[1].size == (size_t) 1);
REQUIRE(alloced[2].size == (size_t) 1);
REQUIRE(freed[0].size == (size_t) 7997);
x = nullptr;
pog_gc_collect();
REQUIRE(alloced[0].size == (size_t) 1);
REQUIRE(alloced[1].size == (size_t) 1);
REQUIRE(freed[0].size == (size_t) 1);
REQUIRE(freed[1].size == (size_t) 7997);
y = nullptr;
z = nullptr;
pog_gc_collect();
REQUIRE(freed[0].size == (size_t) 1);
REQUIRE(freed[1].size == (size_t) 1);
REQUIRE(freed[2].size == (size_t) 1);
REQUIRE(freed[3].size == (size_t) 7997);
pog_squash();
REQUIRE(freed[0].size == (size_t) 8000);
}