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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/process/memory.h"
#include "partition_alloc/buildflags.h"
#if PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
#include "partition_alloc/shim/allocator_shim.h"
#endif // PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
#include <windows.h> // Must be in front of other Windows header files.
#include <new.h>
#include <psapi.h>
#include <stddef.h>
#include <stdlib.h>
namespace base {
namespace {
// Return a non-0 value to retry the allocation.
int ReleaseReservationOrTerminate(size_t size) {
constexpr int kRetryAllocation = 1;
if (internal::ReleaseAddressSpaceReservation()) {
return kRetryAllocation;
}
TerminateBecauseOutOfMemory(size);
}
} // namespace
void EnableTerminationOnHeapCorruption() {
// Ignore the result code. Supported on XP SP3 and Vista.
HeapSetInformation(NULL, HeapEnableTerminationOnCorruption, NULL, 0);
}
void EnableTerminationOnOutOfMemory() {
constexpr int kCallNewHandlerOnAllocationFailure = 1;
_set_new_handler(&ReleaseReservationOrTerminate);
_set_new_mode(kCallNewHandlerOnAllocationFailure);
}
bool UncheckedCalloc(size_t num_items, size_t size, void** result) {
#if PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
*result = allocator_shim::UncheckedCalloc(num_items, size);
#else
*result = calloc(num_items, size);
#endif // PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
return *result != nullptr;
}
bool UncheckedMalloc(size_t size, void** result) {
#if PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
*result = allocator_shim::UncheckedAlloc(size);
#else
// malloc_unchecked is required to implement UncheckedMalloc properly.
// It's provided by allocator_shim_win.cc but since that's not always present,
// In the case, use regular malloc instead.
*result = malloc(size);
#endif // PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
return *result != NULL;
}
void UncheckedFree(void* ptr) {
#if PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
allocator_shim::UncheckedFree(ptr);
#else
free(ptr);
#endif // PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
}
bool UncheckedAlignedAlloc(size_t size, size_t alignment, void** result) {
#if PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
// Reach PartitionAlloc's allocator_shim::internal::AlignedAllocUnchecked by
// way of the shims when available.
*result = allocator_shim::UncheckedAlignedAlloc(size, alignment);
#else
// Fall-back to the UCRT's _aligned_malloc otherwise.
*result = _aligned_malloc(size, alignment);
#endif // PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
return *result != NULL;
}
void UncheckedAlignedFree(void* ptr) {
#if PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
allocator_shim::UncheckedAlignedFree(ptr);
#else
_aligned_free(ptr);
#endif // PA_BUILDFLAG(USE_ALLOCATOR_SHIM)
}
} // namespace base
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