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Side by Side Diff: chrome/browser/zygote_host_linux.h

Issue 6538111: Move the rest of the core files in chrome\browser to content\browser.... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: '' Created 9 years, 10 months ago
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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef CHROME_BROWSER_ZYGOTE_HOST_LINUX_H_ 5 #ifndef CHROME_BROWSER_ZYGOTE_HOST_LINUX_H_
6 #define CHROME_BROWSER_ZYGOTE_HOST_LINUX_H_ 6 #define CHROME_BROWSER_ZYGOTE_HOST_LINUX_H_
7 #pragma once 7 #pragma once
8 8
9 #include <unistd.h> 9 // TODO(jam): remove this file when all files have been converted.
10 10 #include "content/browser/zygote_host_linux.h"
11 #include <string>
12 #include <vector>
13
14 #include "base/global_descriptors_posix.h"
15 #include "base/process.h"
16 #include "base/process_util.h"
17 #include "base/synchronization/lock.h"
18
19 template<typename Type>
20 struct DefaultSingletonTraits;
21
22 static const char kZygoteMagic[] = "ZYGOTE_OK";
23
24 // http://code.google.com/p/chromium/wiki/LinuxZygote
25
26 // The zygote host is the interface, in the browser process, to the zygote
27 // process.
28 class ZygoteHost {
29 public:
30 // Returns the singleton instance.
31 static ZygoteHost* GetInstance();
32
33 void Init(const std::string& sandbox_cmd);
34
35 // Tries to start a renderer process. Returns its pid on success, otherwise
36 // base::kNullProcessHandle;
37 pid_t ForkRenderer(const std::vector<std::string>& command_line,
38 const base::GlobalDescriptors::Mapping& mapping);
39 void EnsureProcessTerminated(pid_t process);
40
41 // Get the termination status (and, optionally, the exit code) of
42 // the process. |exit_code| is set to the exit code of the child
43 // process. (|exit_code| may be NULL.)
44 base::TerminationStatus GetTerminationStatus(base::ProcessHandle handle,
45 int* exit_code);
46
47 // These are the command codes used on the wire between the browser and the
48 // zygote.
49 enum {
50 kCmdFork = 0, // Fork off a new renderer.
51 kCmdReap = 1, // Reap a renderer child.
52 kCmdGetTerminationStatus = 2, // Check what happend to a child process.
53 kCmdGetSandboxStatus = 3, // Read a bitmask of kSandbox*
54 };
55
56 // These form a bitmask which describes the conditions of the sandbox that
57 // the zygote finds itself in.
58 enum {
59 kSandboxSUID = 1 << 0, // SUID sandbox active
60 kSandboxPIDNS = 1 << 1, // SUID sandbox is using the PID namespace
61 kSandboxNetNS = 1 << 2, // SUID sandbox is using the network namespace
62 kSandboxSeccomp = 1 << 3, // seccomp sandbox active.
63 };
64
65 pid_t pid() const { return pid_; }
66
67 // Returns an int which is a bitmask of kSandbox* values. Only valid after
68 // the first render has been forked.
69 int sandbox_status() const {
70 if (have_read_sandbox_status_word_)
71 return sandbox_status_;
72 return 0;
73 }
74
75 // Adjust the OOM score of the given renderer's PID.
76 void AdjustRendererOOMScore(base::ProcessHandle process_handle, int score);
77
78 private:
79 friend struct DefaultSingletonTraits<ZygoteHost>;
80 ZygoteHost();
81 ~ZygoteHost();
82
83 ssize_t ReadReply(void* buf, size_t buflen);
84
85 int control_fd_; // the socket to the zygote
86 // A lock protecting all communication with the zygote. This lock must be
87 // acquired before sending a command and released after the result has been
88 // received.
89 base::Lock control_lock_;
90 pid_t pid_;
91 bool init_;
92 bool using_suid_sandbox_;
93 std::string sandbox_binary_;
94 bool have_read_sandbox_status_word_;
95 int sandbox_status_;
96 };
97 11
98 #endif // CHROME_BROWSER_ZYGOTE_HOST_LINUX_H_ 12 #endif // CHROME_BROWSER_ZYGOTE_HOST_LINUX_H_
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