chromium/base/allocator/partition_allocator/src/partition_alloc/partition_alloc_base/debug/proc_maps_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.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40284755): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif

#include "partition_alloc/partition_alloc_base/debug/proc_maps_linux.h"

#include <fcntl.h>
#include <stddef.h>

#include "partition_alloc/build_config.h"
#include "partition_alloc/partition_alloc_base/files/file_util.h"
#include "partition_alloc/partition_alloc_base/logging.h"
#include "partition_alloc/partition_alloc_base/posix/eintr_wrapper.h"
#include "partition_alloc/partition_alloc_check.h"

#if PA_BUILDFLAG(IS_LINUX) || PA_BUILDFLAG(IS_CHROMEOS) || \
    PA_BUILDFLAG(IS_ANDROID)
#include <inttypes.h>
#endif

namespace partition_alloc::internal::base::debug {

namespace {
// On Android the 'open' function may have two versions:
// int open(const char *pathname, int flags);
// int open(const char *pathname, int flags, mode_t mode);
//
// This doesn't play well with WrapEINTR template. This alias helps the compiler
// to make a decision.
int OpenFile(const char* pathname, int flags) { … }
}  // namespace

// Scans |proc_maps| starting from |pos| returning true if the gate VMA was
// found, otherwise returns false.
static bool ContainsGateVMA(std::string* proc_maps, size_t pos) { … }

bool ReadProcMaps(std::string* proc_maps) { … }

bool ParseProcMaps(const std::string& input,
                   std::vector<MappedMemoryRegion>* regions_out) { … }

}  // namespace partition_alloc::internal::base::debug