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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.
#ifndef COMPONENTS_NACL_LOADER_NACL_LISTENER_H_
#define COMPONENTS_NACL_LOADER_NACL_LISTENER_H_
#include <stddef.h>
#include <stdint.h>
#include <map>
#include <memory>
#include "base/memory/ref_counted.h"
#include "base/memory/shared_memory_mapping.h"
#include "base/synchronization/waitable_event.h"
#include "base/task/single_thread_task_runner.h"
#include "base/threading/thread.h"
#include "build/build_config.h"
#include "components/nacl/common/nacl_types.h"
#include "components/nacl/loader/nacl_ipc_adapter.h"
#include "components/nacl/loader/nacl_trusted_listener.h"
#include "ipc/ipc_listener.h"
namespace IPC {
class SyncChannel;
class SyncMessageFilter;
}
// The NaClListener is an IPC channel listener that waits for a
// request to start a NaCl module.
class NaClListener : public IPC::Listener {
public:
NaClListener();
NaClListener(const NaClListener&) = delete;
NaClListener& operator=(const NaClListener&) = delete;
~NaClListener() override;
// Listen for a request to launch a NaCl module.
void Listen();
bool Send(IPC::Message* msg);
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
void set_prereserved_sandbox_size(size_t prereserved_sandbox_size) {
prereserved_sandbox_size_ = prereserved_sandbox_size;
}
#endif
#if BUILDFLAG(IS_POSIX)
void set_number_of_cores(int number_of_cores) {
number_of_cores_ = number_of_cores;
}
#endif
void* crash_info_shmem_memory() { return crash_info_shmem_mapping_.memory(); }
NaClTrustedListener* trusted_listener() const {
return trusted_listener_.get();
}
void ResolveFileToken(uint64_t token_lo,
uint64_t token_hi,
NaClIPCAdapter::ResolveFileTokenReplyCallback cb);
void OnFileTokenResolved(uint64_t token_lo,
uint64_t token_hi,
IPC::PlatformFileForTransit ipc_fd,
base::FilePath file_path);
private:
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
static int MakeSharedMemorySegment(size_t length, int executable);
#endif
bool OnMessageReceived(const IPC::Message& msg) override;
bool OnOpenResource(const IPC::Message& msg,
const std::string& key,
NaClIPCAdapter::OpenResourceReplyCallback cb);
void OnAddPrefetchedResource(
const nacl::NaClResourcePrefetchResult& prefetched_resource_file);
void OnStart(nacl::NaClStartParams params);
// A channel back to the browser.
std::unique_ptr<IPC::SyncChannel> channel_;
// A filter that allows other threads to use the channel.
scoped_refptr<IPC::SyncMessageFilter> filter_;
base::WaitableEvent shutdown_event_;
base::Thread io_thread_;
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
size_t prereserved_sandbox_size_;
#endif
#if BUILDFLAG(IS_POSIX)
// The outer sandbox on Linux and OSX prevents
// sysconf(_SC_NPROCESSORS) from working; in Windows, there are no
// problems with invoking GetSystemInfo. Therefore, only in
// OS_POSIX do we need to supply the number of cores into the
// NaClChromeMainArgs object.
int number_of_cores_;
#endif
base::WritableSharedMemoryMapping crash_info_shmem_mapping_;
std::unique_ptr<NaClTrustedListener> trusted_listener_;
NaClIPCAdapter::ResolveFileTokenReplyCallback resolved_cb_;
// Used to identify what thread we're on.
scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
typedef std::map<
std::string, // manifest key
std::pair<IPC::PlatformFileForTransit,
base::FilePath> > PrefetchedResourceFilesMap;
PrefetchedResourceFilesMap prefetched_resource_files_;
bool is_started_;
};
#endif // COMPONENTS_NACL_LOADER_NACL_LISTENER_H_
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