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// Copyright 2014 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fxcrt/fx_memory.h"
#include <stdlib.h> // For abort().
#include <iterator>
#include <limits>
#include "build/build_config.h"
#include "third_party/base/debug/alias.h"
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#endif
void* FXMEM_DefaultAlloc(size_t byte_size) {
return pdfium::internal::Alloc(byte_size, 1);
}
void* FXMEM_DefaultCalloc(size_t num_elems, size_t byte_size) {
return pdfium::internal::Calloc(num_elems, byte_size);
}
void* FXMEM_DefaultRealloc(void* pointer, size_t new_size) {
return pdfium::internal::Realloc(pointer, new_size, 1);
}
void FXMEM_DefaultFree(void* pointer) {
FX_Free(pointer);
}
NOINLINE void FX_OutOfMemoryTerminate(size_t size) {
// Convince the linker this should not be folded with similar functions using
// Identical Code Folding.
static int make_this_function_aliased = 0xbd;
pdfium::base::debug::Alias(&make_this_function_aliased);
#if BUILDFLAG(IS_WIN)
// The same custom Windows exception code used in Chromium and Breakpad.
constexpr DWORD kOomExceptionCode = 0xe0000008;
ULONG_PTR exception_args[] = {size};
::RaiseException(kOomExceptionCode, EXCEPTION_NONCONTINUABLE,
std::size(exception_args), exception_args);
#endif
// Terminate cleanly.
abort();
}
namespace pdfium {
namespace internal {
void* AllocOrDie(size_t num_members, size_t member_size) {
void* result = Alloc(num_members, member_size);
if (!result)
FX_OutOfMemoryTerminate(0); // Never returns.
return result;
}
void* AllocOrDie2D(size_t w, size_t h, size_t member_size) {
if (w >= std::numeric_limits<size_t>::max() / h)
FX_OutOfMemoryTerminate(0); // Never returns.
return AllocOrDie(w * h, member_size);
}
void* CallocOrDie(size_t num_members, size_t member_size) {
void* result = Calloc(num_members, member_size);
if (!result)
FX_OutOfMemoryTerminate(0); // Never returns.
return result;
}
void* CallocOrDie2D(size_t w, size_t h, size_t member_size) {
if (w >= std::numeric_limits<size_t>::max() / h)
FX_OutOfMemoryTerminate(0); // Never returns.
return CallocOrDie(w * h, member_size);
}
void* ReallocOrDie(void* ptr, size_t num_members, size_t member_size) {
void* result = Realloc(ptr, num_members, member_size);
if (!result)
FX_OutOfMemoryTerminate(0); // Never returns.
return result;
}
void* StringAllocOrDie(size_t num_members, size_t member_size) {
void* result = StringAlloc(num_members, member_size);
if (!result)
FX_OutOfMemoryTerminate(0); // Never returns.
return result;
}
} // namespace internal
} // namespace pdfium