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89 lines (76 loc) · 2.42 KB
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/*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#include "hermes/Support/Allocator.h"
#include "gtest/gtest.h"
#include "llvh/Support/MathExtras.h"
#include <array>
#include <type_traits>
using namespace hermes;
TEST(AllocatorTest, SmokeTest) {
BumpPtrAllocator alloc;
auto *p = alloc.Allocate<uint64_t>();
*p = 42;
}
TEST(AllocatorTest, CanAllocate) {
constexpr unsigned size = 1 << 20;
BumpPtrAllocator alloc;
uint32_t **ptr = alloc.Allocate<uint32_t *>(size);
for (unsigned i = 0; i < size; i++) {
ptr[i] = alloc.Allocate<uint32_t>();
*ptr[i] = i;
}
for (unsigned i = 0; i < size; i++) {
EXPECT_EQ(i, *ptr[i]);
}
}
TEST(AllocatorTest, VariableSizeAllocation) {
// Total number of allocations to do. Size of each allocation varies.
constexpr unsigned int allocCount = 1000;
BumpPtrAllocator alloc;
unsigned char **ptr = alloc.Allocate<unsigned char *>(allocCount);
for (unsigned int allocIndex = 0; allocIndex < allocCount; ++allocIndex) {
ptr[allocIndex] = alloc.Allocate<unsigned char>(allocIndex);
// Write alloc index into array as test value.
for (unsigned int byteIndex = 0; byteIndex < allocIndex; ++byteIndex) {
// Ensure that test value fits in one byte.
unsigned char testValue = allocIndex & 0xff;
ptr[allocIndex][byteIndex] = testValue;
}
}
// Test that bytes are read back correctly.
for (unsigned int allocIndex = 0; allocIndex < allocCount; ++allocIndex) {
for (unsigned int byteIndex = 0; byteIndex < allocIndex; ++byteIndex) {
unsigned char testValue = allocIndex & 0xff;
EXPECT_EQ(testValue, ptr[allocIndex][byteIndex]);
}
}
}
TEST(AllocatorTest, NewScopeSameMemory) {
BumpPtrAllocator alloc;
uint64_t *p;
{
AllocationScope scope(alloc);
p = alloc.Allocate<uint64_t>();
}
EXPECT_EQ(p, alloc.Allocate<uint64_t>());
}
TEST(AllocatorTest, CanAlign) {
BumpPtrAllocator alloc;
for (int round = 0; round < 100; round++) {
for (int i = 0; i < 16; i++) {
auto p = reinterpret_cast<uintptr_t>(
alloc.Allocate<uint64_t>(1, size_t(1) << i));
EXPECT_EQ(p, llvh::alignTo(p, 1 << i));
}
}
}
TEST(AllocatorTest, CanAllocateHuge) {
BumpPtrAllocator alloc;
constexpr unsigned size = 1 << 24;
auto *p = alloc.Allocate<char[size]>();
memset(p, 'x', size);
}