mirror of
https://github.com/darlinghq/darling-libcxx.git
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2aad5d548c
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@271195 91177308-0d34-0410-b5e6-96231b3b80d8
508 lines
13 KiB
C++
508 lines
13 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SUPPORT_TEST_MEMORY_RESOURCE_HPP
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#define SUPPORT_TEST_MEMORY_RESOURCE_HPP
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#include <experimental/memory_resource>
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#include <memory>
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#include <type_traits>
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#include <cstddef>
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#include <cstdlib>
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#include <cstring>
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#include <cstdint>
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#include <cassert>
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#include "test_macros.h"
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struct AllocController;
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// 'AllocController' is a concrete type that instruments and controls the
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// behavior of of test allocators.
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template <class T>
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class CountingAllocator;
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// 'CountingAllocator' is an basic implementation of the 'Allocator'
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// requirements that use the 'AllocController' interface.
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template <class T>
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class MinAlignAllocator;
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// 'MinAlignAllocator' is an instrumented test type which implements the
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// 'Allocator' requirements. 'MinAlignAllocator' ensures that it *never*
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// returns a pointer to over-aligned storage. For example
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// 'MinAlignPointer<char>{}.allocate(...)' will never a 2-byte aligned
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// pointer.
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template <class T>
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class NullAllocator;
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// 'NullAllocator' is an instrumented test type which implements the
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// 'Allocator' requirements except that 'allocator' and 'deallocate' are
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// nops.
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#define DISALLOW_COPY(Type) \
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Type(Type const&) = delete; \
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Type& operator=(Type const&) = delete
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constexpr std::size_t MaxAlignV = alignof(std::max_align_t);
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struct TestException {};
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struct AllocController {
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int copy_constructed = 0;
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int move_constructed = 0;
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int alive = 0;
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int alloc_count = 0;
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int dealloc_count = 0;
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int is_equal_count = 0;
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std::size_t alive_size;
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std::size_t allocated_size;
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std::size_t deallocated_size;
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std::size_t last_size = 0;
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std::size_t last_align = 0;
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void * last_pointer = 0;
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std::size_t last_alloc_size = 0;
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std::size_t last_alloc_align = 0;
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void * last_alloc_pointer = nullptr;
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std::size_t last_dealloc_size = 0;
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std::size_t last_dealloc_align = 0;
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void * last_dealloc_pointer = nullptr;
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bool throw_on_alloc = false;
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AllocController() = default;
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void countAlloc(void* p, size_t s, size_t a) {
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++alive;
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++alloc_count;
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alive_size += s;
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allocated_size += s;
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last_pointer = last_alloc_pointer = p;
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last_size = last_alloc_size = s;
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last_align = last_alloc_align = a;
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}
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void countDealloc(void* p, size_t s, size_t a) {
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--alive;
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++dealloc_count;
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alive_size -= s;
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deallocated_size += s;
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last_pointer = last_dealloc_pointer = p;
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last_size = last_dealloc_size = s;
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last_align = last_dealloc_align = a;
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}
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void reset() { std::memset(this, 0, sizeof(*this)); }
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public:
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bool checkAlloc(void* p, size_t s, size_t a) const {
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return p == last_alloc_pointer &&
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s == last_alloc_size &&
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a == last_alloc_align;
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}
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bool checkAlloc(void* p, size_t s) const {
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return p == last_alloc_pointer &&
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s == last_alloc_size;
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}
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bool checkAllocAtLeast(void* p, size_t s, size_t a) const {
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return p == last_alloc_pointer &&
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s <= last_alloc_size &&
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a <= last_alloc_align;
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}
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bool checkAllocAtLeast(void* p, size_t s) const {
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return p == last_alloc_pointer &&
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s <= last_alloc_size;
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}
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bool checkDealloc(void* p, size_t s, size_t a) const {
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return p == last_dealloc_pointer &&
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s == last_dealloc_size &&
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a == last_dealloc_align;
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}
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bool checkDealloc(void* p, size_t s) const {
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return p == last_dealloc_pointer &&
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s == last_dealloc_size;
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}
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bool checkDeallocMatchesAlloc() const {
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return last_dealloc_pointer == last_alloc_pointer &&
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last_dealloc_size == last_alloc_size &&
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last_dealloc_align == last_alloc_align;
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}
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void countIsEqual() {
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++is_equal_count;
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}
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bool checkIsEqualCalledEq(int n) const {
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return is_equal_count == n;
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}
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private:
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DISALLOW_COPY(AllocController);
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};
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template <class T>
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class CountingAllocator
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{
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public:
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typedef T value_type;
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typedef T* pointer;
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CountingAllocator() = delete;
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explicit CountingAllocator(AllocController& PP) : P(&PP) {}
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CountingAllocator(CountingAllocator const& other) : P(other.P) {
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P->copy_constructed += 1;
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}
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CountingAllocator(CountingAllocator&& other) : P(other.P) {
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P->move_constructed += 1;
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}
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template <class U>
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CountingAllocator(CountingAllocator<U> const& other) TEST_NOEXCEPT : P(other.P) {
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P->copy_constructed += 1;
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}
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template <class U>
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CountingAllocator(CountingAllocator<U>&& other) TEST_NOEXCEPT : P(other.P) {
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P->move_constructed += 1;
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}
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T* allocate(std::size_t n)
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{
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void* ret = ::operator new(n*sizeof(T));
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P->countAlloc(ret, n*sizeof(T), alignof(T));
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return static_cast<T*>(ret);
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}
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void deallocate(T* p, std::size_t n)
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{
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void* vp = static_cast<void*>(p);
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P->countDealloc(vp, n*sizeof(T), alignof(T));
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::operator delete(vp);
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}
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AllocController& getController() const { return *P; }
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private:
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template <class Tp> friend class CountingAllocator;
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AllocController *P;
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};
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template <class T, class U>
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inline bool operator==(CountingAllocator<T> const& x,
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CountingAllocator<U> const& y) {
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return &x.getController() == &y.getController();
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}
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template <class T, class U>
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inline bool operator!=(CountingAllocator<T> const& x,
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CountingAllocator<U> const& y) {
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return !(x == y);
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}
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template <class T>
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class MinAlignedAllocator
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{
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public:
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typedef T value_type;
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typedef T* pointer;
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MinAlignedAllocator() = delete;
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explicit MinAlignedAllocator(AllocController& R) : P(&R) {}
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MinAlignedAllocator(MinAlignedAllocator const& other) : P(other.P) {
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P->copy_constructed += 1;
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}
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MinAlignedAllocator(MinAlignedAllocator&& other) : P(other.P) {
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P->move_constructed += 1;
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}
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template <class U>
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MinAlignedAllocator(MinAlignedAllocator<U> const& other) TEST_NOEXCEPT : P(other.P) {
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P->copy_constructed += 1;
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}
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template <class U>
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MinAlignedAllocator(MinAlignedAllocator<U>&& other) TEST_NOEXCEPT : P(other.P) {
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P->move_constructed += 1;
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}
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T* allocate(std::size_t n) {
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char* aligned_ptr = (char*)::operator new(alloc_size(n*sizeof(T)));
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assert(is_max_aligned(aligned_ptr));
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char* unaligned_ptr = aligned_ptr + alignof(T);
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assert(is_min_aligned(unaligned_ptr));
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P->countAlloc(unaligned_ptr, n * sizeof(T), alignof(T));
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return ((T*)unaligned_ptr);
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}
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void deallocate(T* p, std::size_t n) {
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assert(is_min_aligned(p));
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char* aligned_ptr = ((char*)p) - alignof(T);
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assert(is_max_aligned(aligned_ptr));
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P->countDealloc(p, n*sizeof(T), alignof(T));
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return ::operator delete(static_cast<void*>(aligned_ptr));
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}
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AllocController& getController() const { return *P; }
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private:
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static const std::size_t BlockSize = alignof(std::max_align_t);
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static std::size_t alloc_size(std::size_t s) {
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std::size_t bytes = (s + BlockSize - 1) & ~(BlockSize - 1);
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bytes += BlockSize;
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assert(bytes % BlockSize == 0);
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return bytes;
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}
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static bool is_max_aligned(void* p) {
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return reinterpret_cast<std::uintptr_t>(p) % BlockSize == 0;
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}
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static bool is_min_aligned(void* p) {
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if (alignof(T) == BlockSize) {
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return is_max_aligned(p);
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} else {
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return reinterpret_cast<std::uintptr_t>(p) % BlockSize == alignof(T);
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}
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}
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template <class Tp> friend class MinAlignedAllocator;
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mutable AllocController *P;
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};
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template <class T, class U>
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inline bool operator==(MinAlignedAllocator<T> const& x,
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MinAlignedAllocator<U> const& y) {
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return &x.getController() == &y.getController();
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}
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template <class T, class U>
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inline bool operator!=(MinAlignedAllocator<T> const& x,
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MinAlignedAllocator<U> const& y) {
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return !(x == y);
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}
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template <class T>
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class NullAllocator
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{
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public:
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typedef T value_type;
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typedef T* pointer;
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NullAllocator() = delete;
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explicit NullAllocator(AllocController& PP) : P(&PP) {}
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NullAllocator(NullAllocator const& other) : P(other.P) {
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P->copy_constructed += 1;
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}
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NullAllocator(NullAllocator&& other) : P(other.P) {
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P->move_constructed += 1;
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}
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template <class U>
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NullAllocator(NullAllocator<U> const& other) TEST_NOEXCEPT : P(other.P) {
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P->copy_constructed += 1;
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}
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template <class U>
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NullAllocator(NullAllocator<U>&& other) TEST_NOEXCEPT : P(other.P) {
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P->move_constructed += 1;
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}
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T* allocate(std::size_t n)
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{
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P->countAlloc(nullptr, n*sizeof(T), alignof(T));
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return nullptr;
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}
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void deallocate(T* p, std::size_t n)
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{
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void* vp = static_cast<void*>(p);
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P->countDealloc(vp, n*sizeof(T), alignof(T));
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}
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AllocController& getController() const { return *P; }
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private:
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template <class Tp> friend class NullAllocator;
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AllocController *P;
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};
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template <class T, class U>
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inline bool operator==(NullAllocator<T> const& x,
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NullAllocator<U> const& y) {
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return &x.getController() == &y.getController();
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}
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template <class T, class U>
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inline bool operator!=(NullAllocator<T> const& x,
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NullAllocator<U> const& y) {
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return !(x == y);
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}
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template <class ProviderT, int = 0>
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class TestResourceImp : public std::experimental::pmr::memory_resource
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{
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public:
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static int resource_alive;
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static int resource_constructed;
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static int resource_destructed;
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static void resetStatics() {
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assert(resource_alive == 0);
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resource_alive = 0;
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resource_constructed = 0;
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resource_destructed = 0;
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}
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using memory_resource = std::experimental::pmr::memory_resource;
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using Provider = ProviderT;
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int value;
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explicit TestResourceImp(int val = 0) : value(val) {
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++resource_alive;
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++resource_constructed;
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}
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~TestResourceImp() noexcept {
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--resource_alive;
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++resource_destructed;
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}
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void reset() { C.reset(); P.reset(); }
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AllocController& getController() { return C; }
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bool checkAlloc(void* p, std::size_t s, std::size_t a) const
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{ return C.checkAlloc(p, s, a); }
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bool checkDealloc(void* p, std::size_t s, std::size_t a) const
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{ return C.checkDealloc(p, s, a); }
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bool checkIsEqualCalledEq(int n) const { return C.checkIsEqualCalledEq(n); }
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protected:
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virtual void * do_allocate(std::size_t s, std::size_t a) {
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if (C.throw_on_alloc) {
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#ifndef TEST_HAS_NO_EXCEPTIONS
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throw TestException{};
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#else
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assert(false);
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#endif
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}
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void* ret = P.allocate(s, a);
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C.countAlloc(ret, s, a);
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return ret;
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}
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virtual void do_deallocate(void * p, std::size_t s, std::size_t a) {
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C.countDealloc(p, s, a);
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P.deallocate(p, s, a);
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}
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virtual bool do_is_equal(memory_resource const & other) const noexcept {
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C.countIsEqual();
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TestResourceImp const * o = dynamic_cast<TestResourceImp const *>(&other);
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return o && o->value == value;
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}
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private:
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mutable AllocController C;
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mutable Provider P;
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DISALLOW_COPY(TestResourceImp);
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};
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template <class Provider, int N>
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int TestResourceImp<Provider, N>::resource_alive = 0;
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template <class Provider, int N>
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int TestResourceImp<Provider, N>::resource_constructed = 0;
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template <class Provider, int N>
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int TestResourceImp<Provider, N>::resource_destructed = 0;
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struct NullProvider {
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NullProvider() {}
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void* allocate(size_t, size_t) { return nullptr; }
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void deallocate(void*, size_t, size_t) {}
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void reset() {}
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private:
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DISALLOW_COPY(NullProvider);
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};
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struct NewDeleteProvider {
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NewDeleteProvider() {}
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void* allocate(size_t s, size_t) { return ::operator new(s); }
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void deallocate(void* p, size_t, size_t) { ::operator delete(p); }
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void reset() {}
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private:
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DISALLOW_COPY(NewDeleteProvider);
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};
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template <size_t Size = 4096 * 10> // 10 pages worth of memory.
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struct BufferProvider {
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char buffer[Size];
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void* next = &buffer;
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size_t space = Size;
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BufferProvider() {}
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void* allocate(size_t s, size_t a) {
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void* ret = std::align(s, a, next, space);
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if (ret == nullptr) {
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#ifndef TEST_HAS_NO_EXCEPTIONS
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throw std::bad_alloc();
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#else
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assert(false);
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#endif
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}
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return ret;
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}
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void deallocate(void*, size_t, size_t) {}
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void reset() {
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next = &buffer;
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space = Size;
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}
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private:
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DISALLOW_COPY(BufferProvider);
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};
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using NullResource = TestResourceImp<NullProvider, 0>;
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using NewDeleteResource = TestResourceImp<NewDeleteProvider, 0>;
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using TestResource = TestResourceImp<BufferProvider<>, 0>;
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using TestResource1 = TestResourceImp<BufferProvider<>, 1>;
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using TestResource2 = TestResourceImp<BufferProvider<>, 2>;
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#endif /* SUPPORT_TEST_MEMORY_RESOURCE_HPP */
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