chromium/skia/ext/SkMemory_new_handler.cpp

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <stddef.h>
#include <stdlib.h>

#include <algorithm>
#include <tuple>

#include "base/debug/alias.h"
#include "base/process/memory.h"
#include "build/build_config.h"
#include "third_party/skia/include/core/SkTypes.h"
#include "third_party/skia/include/private/base/SkMalloc.h"

#if BUILDFLAG(IS_WIN)
#include <malloc.h>
#include <windows.h>
#elif BUILDFLAG(IS_APPLE)
#include <malloc/malloc.h>
#else
#include <malloc.h>
#endif

// This implementation of sk_malloc_flags() and friends is similar to
// SkMemory_malloc.cpp, except it uses base::UncheckedMalloc and friends
// for non-SK_MALLOC_THROW calls.
//
// The name of this file is historic: a previous implementation tried to
// use std::set_new_handler() for the same effect, but it didn't actually work.

static inline void* throw_on_failure(size_t size, void* p) { … }

void sk_abort_no_print() { … }

void sk_out_of_memory(void) { … }

void* sk_realloc_throw(void* addr, size_t size) { … }

void sk_free(void* p) { … }

// We get lots of bugs filed on us that amount to overcommiting bitmap memory,
// then some time later failing to back that VM with physical memory.
// They're hard to track down, so in Debug mode we touch all memory right up front.
//
// For malloc, fill is an arbitrary byte and ideally not 0.  For calloc, it's got to be 0.
static void* prevent_overcommit(int fill, size_t size, void* p) { … }

static void* malloc_nothrow(size_t size, int debug_sentinel) { … }

static void* malloc_throw(size_t size, int debug_sentinel) { … }

static void* calloc_nothrow(size_t size) { … }

static void* calloc_throw(size_t size) { … }

void* sk_malloc_flags(size_t size, unsigned flags) { … }

size_t sk_malloc_size(void* addr, size_t size) { … }