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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "build/build_config.h"
#include "chrome/browser/nacl_process_host.h"
#if defined(OS_POSIX)
#include <fcntl.h>
#endif
#if defined(OS_POSIX)
#include "base/global_descriptors_posix.h"
#endif
#include "base/path_service.h"
#include "base/process_util.h"
#include "chrome/browser/renderer_host/resource_message_filter.h"
#include "chrome/common/chrome_descriptors.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/logging_chrome.h"
#include "chrome/common/nacl_messages.h"
#include "ipc/ipc_switches.h"
#if defined(OS_WIN)
#include "chrome/browser/sandbox_policy.h"
#endif
#if defined(OS_POSIX)
#include "ipc/ipc_channel_posix.h"
#endif
NaClProcessHost::NaClProcessHost(
ResourceDispatcherHost *resource_dispatcher_host,
const std::wstring& url)
: ChildProcessHost(NACL_PROCESS, resource_dispatcher_host),
resource_dispatcher_host_(resource_dispatcher_host) {
set_name(url);
}
bool NaClProcessHost::Launch(ResourceMessageFilter* renderer_msg_filter,
const int descriptor,
nacl::FileDescriptor* imc_handle,
base::ProcessHandle* nacl_process_handle,
base::ProcessId* nacl_process_id) {
#ifdef DISABLE_NACL
NOTIMPLEMENTED() << "Native Client disabled at build time";
return false;
#else
nacl::Handle pair[2];
bool success = false;
NATIVE_HANDLE(*imc_handle) = nacl::kInvalidHandle;
*nacl_process_handle = nacl::kInvalidHandle;
*nacl_process_id = 0;
// Create a connected socket
if (nacl::SocketPair(pair) == -1) {
return false;
}
// Launch the process
success = LaunchSelLdr(renderer_msg_filter, descriptor, pair[1]);
if (!success) {
nacl::Close(pair[0]);
return false;
}
#if NACL_WINDOWS
// Duplicate the IMC handle
DuplicateHandle(base::GetCurrentProcessHandle(),
reinterpret_cast<HANDLE>(pair[0]),
renderer_msg_filter->handle(),
imc_handle,
GENERIC_READ | GENERIC_WRITE,
FALSE,
DUPLICATE_CLOSE_SOURCE);
// Duplicate the process handle
DuplicateHandle(base::GetCurrentProcessHandle(),
handle(),
renderer_msg_filter->handle(),
nacl_process_handle,
PROCESS_DUP_HANDLE,
FALSE,
0);
#else
int flags = fcntl(pair[0], F_GETFD);
if (flags != -1) {
flags |= FD_CLOEXEC;
fcntl(pair[0], F_SETFD, flags);
}
// No need to dup the imc_handle - we don't pass it anywhere else so
// it cannot be closed.
imc_handle->fd = pair[0];
imc_handle->auto_close = true;
// We use pid as process handle on Posix
*nacl_process_handle = handle();
#endif
// Get the pid of the NaCl process
*nacl_process_id = base::GetProcId(handle());
return true;
#endif // DISABLE_NACL
}
bool NaClProcessHost::LaunchSelLdr(ResourceMessageFilter* renderer_msg_filter,
const int descriptor,
const nacl::Handle imc_handle) {
if (!CreateChannel())
return false;
// Build command line for nacl.
const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
FilePath exe_path =
browser_command_line.GetSwitchValuePath(switches::kBrowserSubprocessPath);
if (exe_path.empty() && !PathService::Get(base::FILE_EXE, &exe_path))
return false;
CommandLine cmd_line(exe_path);
if (logging::DialogsAreSuppressed())
cmd_line.AppendSwitch(switches::kNoErrorDialogs);
// Propagate the following switches to the plugin command line (along with
// any associated values) if present in the browser command line.
// TODO(gregoryd): check which flags of those below can be supported.
static const char* const switch_names[] = {
switches::kNoSandbox,
switches::kTestSandbox,
switches::kDisableBreakpad,
switches::kFullMemoryCrashReport,
switches::kEnableLogging,
switches::kDisableLogging,
switches::kLoggingLevel,
switches::kEnableDCHECK,
switches::kSilentDumpOnDCHECK,
switches::kMemoryProfiling,
};
for (size_t i = 0; i < arraysize(switch_names); ++i) {
if (browser_command_line.HasSwitch(switch_names[i])) {
cmd_line.AppendSwitchWithValue(
switch_names[i],
browser_command_line.GetSwitchValueASCII(switch_names[i]));
}
}
cmd_line.AppendSwitchWithValue(switches::kProcessType,
switches::kNaClProcess);
cmd_line.AppendSwitchWithValue(switches::kProcessChannelID,
ASCIIToWide(channel_id()));
base::ProcessHandle process = 0;
#if defined(OS_WIN)
process = sandbox::StartProcess(&cmd_line);
#else
base::file_handle_mapping_vector fds_to_map;
const int ipcfd = channel().GetClientFileDescriptor();
if (ipcfd > -1)
fds_to_map.push_back(std::pair<int, int>(
ipcfd, kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor));
base::LaunchApp(cmd_line.argv(), fds_to_map, false, &process);
#endif
if (!process)
return false;
SetHandle(process);
// send a message with duplicated imc_handle to sel_ldr
return SendStartMessage(process, descriptor, imc_handle);
}
bool NaClProcessHost::SendStartMessage(base::ProcessHandle process,
int descriptor,
nacl::Handle imc_handle) {
nacl::FileDescriptor channel;
#if defined(OS_WIN)
if (!DuplicateHandle(GetCurrentProcess(),
reinterpret_cast<HANDLE>(imc_handle),
process,
reinterpret_cast<HANDLE*>(&channel),
GENERIC_READ | GENERIC_WRITE,
FALSE, DUPLICATE_CLOSE_SOURCE)) {
return false;
}
#else
channel.fd = dup(imc_handle);
channel.auto_close = true;
#endif
NaClProcessMsg_Start* msg = new NaClProcessMsg_Start(descriptor,
channel);
if (!Send(msg)) {
return false;
}
return true;
}
void NaClProcessHost::OnMessageReceived(const IPC::Message& msg) {
NOTREACHED() << "Invalid message with type = " << msg.type();
}
URLRequestContext* NaClProcessHost::GetRequestContext(
uint32 request_id,
const ViewHostMsg_Resource_Request& request_data) {
return NULL;
}
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