Source/bmalloc/libpas/src/test/JITHeapTests.cpp

/*
 * Copyright (c) 2021 Apple Inc. All rights reserved.
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#include "TestHarness.h"

#if PAS_ENABLE_JIT

#include <iostream>
#include "jit_heap.h"
#include "jit_heap_config.h"
#include "pas_utils.h"

using namespace std;

namespace {

void testAllocateShrinkAndAllocate(unsigned initialObjectSize,
                                   unsigned numInitialObjects,
                                   unsigned initialSizeOfObjectToShrink,
                                   unsigned sizeToShrinkTo,
                                   unsigned finalObjectSize,
                                   unsigned expectedAlignmentOfFinalObject)
{
    for (unsigned i = numInitialObjects; i--;) {
        void* ptr = jit_heap_try_allocate(initialObjectSize);
        CHECK(ptr);
    }

    PAS_ASSERT(sizeToShrinkTo <= initialSizeOfObjectToShrink);

    void* ptr = jit_heap_try_allocate(initialSizeOfObjectToShrink);
    CHECK(ptr);

    jit_heap_shrink(ptr, sizeToShrinkTo);

    uintptr_t expectedAddress = pas_round_up_to_power_of_2(
        reinterpret_cast<uintptr_t>(ptr) + (sizeToShrinkTo ? sizeToShrinkTo : 1),
        expectedAlignmentOfFinalObject);

    void* newPtr = jit_heap_try_allocate(finalObjectSize);

    CHECK_EQUAL(
        newPtr,
        reinterpret_cast<void*>(expectedAddress));

    jit_heap_deallocate(ptr);
    jit_heap_deallocate(newPtr);
}

} // anonymous namespace

#endif // PAS_ENABLE_JIT

void addJITHeapTests()
{
#if PAS_ENABLE_JIT
    BootJITHeap bootJITHeap;

    ADD_TEST(testAllocateShrinkAndAllocate(0, 0, 0, 0, 0, 4));
    ADD_TEST(testAllocateShrinkAndAllocate(0, 0, 128, 64, 64, 4));
    ADD_TEST(testAllocateShrinkAndAllocate(32, 10, 128, 64, 64, 4));
    ADD_TEST(testAllocateShrinkAndAllocate(32, 10, 1000, 500, 1000, 4));
    ADD_TEST(testAllocateShrinkAndAllocate(0, 0, 2048, 512, 1100, 256));
    ADD_TEST(testAllocateShrinkAndAllocate(32, 10, 2048, 512, 1100, 256));
    ADD_TEST(testAllocateShrinkAndAllocate(1100, 10, 2048, 512, 1100, 256));
    ADD_TEST(testAllocateShrinkAndAllocate(0, 0, 100000, 10000, 80000, 4));
#endif // PAS_ENABLE_JIT
}