chromium/base/process/memory_linux.cc

// 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 <stddef.h>

#include <new>

#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/process/internal_linux.h"
#include "base/strings/string_number_conversions.h"
#include "base/threading/thread_restrictions.h"
#include "build/build_config.h"
#include "partition_alloc/buildflags.h"
#include "partition_alloc/shim/allocator_shim.h"

#if !PA_BUILDFLAG(USE_ALLOCATOR_SHIM) && \
    !defined(MEMORY_TOOL_REPLACES_ALLOCATOR) && defined(LIBC_GLIBC)
extern "C" {
void* __libc_malloc(size_t);
void __libc_free(void*);
}
#endif

namespace base {

namespace {

void ReleaseReservationOrTerminate() { … }

}  // namespace

void EnableTerminationOnHeapCorruption() { … }

void EnableTerminationOnOutOfMemory() { … }

// ScopedAllowBlocking() has private constructor and it can only be used in
// friend classes/functions. Declaring a class is easier in this situation to
// avoid adding more dependency to thread_restrictions.h because of the
// parameter used in AdjustOOMScore(). Specifically, ProcessId is a typedef
// and we'll need to include another header file in thread_restrictions.h
// without the class.
class AdjustOOMScoreHelper { … };

// static.
bool AdjustOOMScoreHelper::AdjustOOMScore(ProcessId process, int score) { … }

// NOTE: This is not the only version of this function in the source:
// the setuid sandbox (in process_util_linux.c, in the sandbox source)
// also has its own C version.
bool AdjustOOMScore(ProcessId process, int score) { … }

bool UncheckedMalloc(size_t size, void** result) { … }

void UncheckedFree(void* ptr) { … }

}  // namespace base