blob: 9e8810799ba16a154a2c019a0a69a667c0b73fa7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
// Copyright (c) 2014 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.
#ifndef COMPONENTS_BROWSER_WATCHER_WATCHER_CLIENT_WIN_H_
#define COMPONENTS_BROWSER_WATCHER_WATCHER_CLIENT_WIN_H_
#include "base/callback.h"
#include "base/macros.h"
#include "base/process/process.h"
namespace base {
class CommandLine;
} // namespace base
namespace browser_watcher {
// An interface class to take care of the details in launching a browser
// watch process.
class WatcherClient {
public:
// A CommandLineGenerator generates command lines that will launch a separate
// process and pass the supplied HANDLE to ExitCodeWatcher in that process.
typedef base::Callback<base::CommandLine(HANDLE)> CommandLineGenerator;
// Constructs a watcher client that launches its watcher process using the
// command line generated by |command_line_generator|.
explicit WatcherClient(const CommandLineGenerator& command_line_generator);
// Launches the watcher process such that the child process is able to inherit
// a handle to the current process. If use_legacy_launch() is true, this uses
// a non-threadsafe legacy launch mode that's compatible with Windows XP.
void LaunchWatcher();
// Ensures that |handle| may be inherited by the watcher process. |handle|
// must still be inheritable, and it's the client's responsibility to
// communicate the value of |handle| to the launched process.
void AddInheritedHandle(HANDLE handle);
// Returns the launched process.
const base::Process& process() const { return process_; }
// Accessors, exposed only for testing.
bool use_legacy_launch() const { return use_legacy_launch_; }
void set_use_legacy_launch(bool use_legacy_launch) {
use_legacy_launch_ = use_legacy_launch;
}
private:
// If true, the watcher process will be launched with XP legacy handle
// inheritance. This is not thread safe and can leak random handles into the
// child process, but it's the best we can do on XP.
bool use_legacy_launch_;
// The CommandLineGenerator passed to the constructor.
CommandLineGenerator command_line_generator_;
// A handle to the launched watcher process. Valid after a successful
// LaunchWatcher() call.
base::Process process_;
std::vector<HANDLE> inherited_handles_;
DISALLOW_COPY_AND_ASSIGN(WatcherClient);
};
} // namespace browser_watcher
#endif // COMPONENTS_BROWSER_WATCHER_WATCHER_CLIENT_WIN_H_
|
