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Tweaked sweeping, test with detached pointers

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valtermiari 2023-02-20 14:34:57 +01:00 • committed by Victor Olin
parent 6cd6edb594
commit 3860d0ec4f
3 changed files with 42 additions and 33 deletions
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32
src/GC/tests/h_test.cpp
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@ -9,36 +9,42 @@ GC::Heap *gc = GC::Heap::the();
*dst = local;
} */
void create_array(size_t size) {
int *arr = static_cast<int *>(gc->alloc(sizeof(int) * size));
}
void detach_pointer(long **ptr) {
long dummy = 10; // dummy value
long *dummy_ptr = &dummy;
*ptr = dummy_ptr;
std::cout << "Dummy pointer: \t" << dummy_ptr << std::endl;
std::cout << "Detach pointer result:\t" << ptr << std::endl;
}
void init() {
auto stack_start = reinterpret_cast<uintptr_t *>(__builtin_frame_address(0));
//auto stack_end = stack_start - 40;
std::cout << "Stack start from init:\t" << stack_start << std::endl;
//std::cout << "Imaginary stack end:\t" << stack_end << std::endl;
int *arr = static_cast<int *>(gc->alloc(sizeof(int) * 100));
create_array(100);
//arr = create_array(100);
//std::cout << "Arr_ptr" << std::hex << arr << "\n\n\n" << std::endl;
for (int i = 0; i < (sizeof(int) * 100); i++) {
arr[i] = i;
}
for (int i = 0; i < (sizeof(int) * 20); i++) {
gc->alloc(sizeof(int));
}
std::cout << "Pointer for arr:\t" << &arr << std::endl;
long a = 20;
long *l = static_cast<long *>(gc->alloc(sizeof(long)));
std::cout << "Pointer for l:\t\t" << &l << std::endl;
int *i = static_cast<int *>(gc->alloc(sizeof(int)));
std::cout << "Pointer for i:\t\t" << &i << std::endl;
//l = &a;
//*l = 20;
std::cout << "l points to:\t\t" << l << std::endl;
detach_pointer(&l);
std::cout << "l points to:\t\t" << l << std::endl;
// l still gets marked, which is not supposed to happen
}
int main() {
auto stack_start = reinterpret_cast<uintptr_t *>(__builtin_frame_address(0));
std::cout << "Stack start from main:\t" << stack_start << std::endl;
init();
gc->collect(MARK | SWEEP); // some bug in free (vector out of range)
gc->collect(MARK); // some bug in free (vector out of range)
gc->print_contents();
//delete gc;
return 0;
}