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Side by Side Diff: content/zygote/zygote_linux.h

Issue 1149113006: Move Pickle to base namespace. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 5 years, 6 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 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 CONTENT_ZYGOTE_ZYGOTE_LINUX_H_ 5 #ifndef CONTENT_ZYGOTE_ZYGOTE_LINUX_H_
6 #define CONTENT_ZYGOTE_ZYGOTE_LINUX_H_ 6 #define CONTENT_ZYGOTE_ZYGOTE_LINUX_H_
7 7
8 #include <stddef.h> 8 #include <stddef.h>
9 9
10 #include <string> 10 #include <string>
11 11
12 #include "base/containers/small_map.h" 12 #include "base/containers/small_map.h"
13 #include "base/files/scoped_file.h" 13 #include "base/files/scoped_file.h"
14 #include "base/memory/scoped_vector.h" 14 #include "base/memory/scoped_vector.h"
15 #include "base/posix/global_descriptors.h" 15 #include "base/posix/global_descriptors.h"
16 #include "base/process/kill.h" 16 #include "base/process/kill.h"
17 #include "base/process/process.h" 17 #include "base/process/process.h"
18 18
19 namespace base {
19 class Pickle; 20 class Pickle;
20 class PickleIterator; 21 class PickleIterator;
22 }
21 23
22 namespace content { 24 namespace content {
23 25
24 class ZygoteForkDelegate; 26 class ZygoteForkDelegate;
25 27
26 // This is the object which implements the zygote. The ZygoteMain function, 28 // This is the object which implements the zygote. The ZygoteMain function,
27 // which is called from ChromeMain, simply constructs one of these objects and 29 // which is called from ChromeMain, simply constructs one of these objects and
28 // runs it. 30 // runs it.
29 class Zygote { 31 class Zygote {
30 public: 32 public:
(...skipping 25 matching lines...) Expand all
56 // Returns true if the NS sandbox is active. 58 // Returns true if the NS sandbox is active.
57 bool UsingNSSandbox() const; 59 bool UsingNSSandbox() const;
58 60
59 // --------------------------------------------------------------------------- 61 // ---------------------------------------------------------------------------
60 // Requests from the browser... 62 // Requests from the browser...
61 63
62 // Read and process a request from the browser. Returns true if we are in a 64 // Read and process a request from the browser. Returns true if we are in a
63 // new process and thus need to unwind back into ChromeMain. 65 // new process and thus need to unwind back into ChromeMain.
64 bool HandleRequestFromBrowser(int fd); 66 bool HandleRequestFromBrowser(int fd);
65 67
66 void HandleReapRequest(int fd, PickleIterator iter); 68 void HandleReapRequest(int fd, base::PickleIterator iter);
67 69
68 // Get the termination status of |real_pid|. |real_pid| is the PID as it 70 // Get the termination status of |real_pid|. |real_pid| is the PID as it
69 // appears outside of the sandbox. 71 // appears outside of the sandbox.
70 // Return true if it managed to get the termination status and return the 72 // Return true if it managed to get the termination status and return the
71 // status in |status| and the exit code in |exit_code|. 73 // status in |status| and the exit code in |exit_code|.
72 bool GetTerminationStatus(base::ProcessHandle real_pid, bool known_dead, 74 bool GetTerminationStatus(base::ProcessHandle real_pid, bool known_dead,
73 base::TerminationStatus* status, 75 base::TerminationStatus* status,
74 int* exit_code); 76 int* exit_code);
75 77
76 void HandleGetTerminationStatus(int fd, 78 void HandleGetTerminationStatus(int fd,
77 PickleIterator iter); 79 base::PickleIterator iter);
78 80
79 // This is equivalent to fork(), except that, when using the SUID sandbox, it 81 // This is equivalent to fork(), except that, when using the SUID sandbox, it
80 // returns the real PID of the child process as it appears outside the 82 // returns the real PID of the child process as it appears outside the
81 // sandbox, rather than returning the PID inside the sandbox. The child's 83 // sandbox, rather than returning the PID inside the sandbox. The child's
82 // real PID is determined by having it call content::SendZygoteChildPing(int) 84 // real PID is determined by having it call content::SendZygoteChildPing(int)
83 // using the |pid_oracle| descriptor. 85 // using the |pid_oracle| descriptor.
84 // Finally, when using a ZygoteForkDelegate helper, |uma_name|, |uma_sample|, 86 // Finally, when using a ZygoteForkDelegate helper, |uma_name|, |uma_sample|,
85 // and |uma_boundary_value| may be set if the helper wants to make a UMA 87 // and |uma_boundary_value| may be set if the helper wants to make a UMA
86 // report via UMA_HISTOGRAM_ENUMERATION. 88 // report via UMA_HISTOGRAM_ENUMERATION.
87 int ForkWithRealPid(const std::string& process_type, 89 int ForkWithRealPid(const std::string& process_type,
88 const base::GlobalDescriptors::Mapping& fd_mapping, 90 const base::GlobalDescriptors::Mapping& fd_mapping,
89 const std::string& channel_id, 91 const std::string& channel_id,
90 base::ScopedFD pid_oracle, 92 base::ScopedFD pid_oracle,
91 std::string* uma_name, 93 std::string* uma_name,
92 int* uma_sample, 94 int* uma_sample,
93 int* uma_boundary_value); 95 int* uma_boundary_value);
94 96
95 // Unpacks process type and arguments from |iter| and forks a new process. 97 // Unpacks process type and arguments from |iter| and forks a new process.
96 // Returns -1 on error, otherwise returns twice, returning 0 to the child 98 // Returns -1 on error, otherwise returns twice, returning 0 to the child
97 // process and the child process ID to the parent process, like fork(). 99 // process and the child process ID to the parent process, like fork().
98 base::ProcessId ReadArgsAndFork(PickleIterator iter, 100 base::ProcessId ReadArgsAndFork(base::PickleIterator iter,
99 ScopedVector<base::ScopedFD> fds, 101 ScopedVector<base::ScopedFD> fds,
100 std::string* uma_name, 102 std::string* uma_name,
101 int* uma_sample, 103 int* uma_sample,
102 int* uma_boundary_value); 104 int* uma_boundary_value);
103 105
104 // Handle a 'fork' request from the browser: this means that the browser 106 // Handle a 'fork' request from the browser: this means that the browser
105 // wishes to start a new renderer. Returns true if we are in a new process, 107 // wishes to start a new renderer. Returns true if we are in a new process,
106 // otherwise writes the child_pid back to the browser via |fd|. Writes a 108 // otherwise writes the child_pid back to the browser via |fd|. Writes a
107 // child_pid of -1 on error. 109 // child_pid of -1 on error.
108 bool HandleForkRequest(int fd, 110 bool HandleForkRequest(int fd,
109 PickleIterator iter, 111 base::PickleIterator iter,
110 ScopedVector<base::ScopedFD> fds); 112 ScopedVector<base::ScopedFD> fds);
111 113
112 bool HandleGetSandboxStatus(int fd, 114 bool HandleGetSandboxStatus(int fd,
113 PickleIterator iter); 115 base::PickleIterator iter);
114 116
115 // The Zygote needs to keep some information about each process. Most 117 // The Zygote needs to keep some information about each process. Most
116 // notably what the PID of the process is inside the PID namespace of 118 // notably what the PID of the process is inside the PID namespace of
117 // the Zygote and whether or not a process was started by the 119 // the Zygote and whether or not a process was started by the
118 // ZygoteForkDelegate helper. 120 // ZygoteForkDelegate helper.
119 ZygoteProcessMap process_info_map_; 121 ZygoteProcessMap process_info_map_;
120 122
121 const int sandbox_flags_; 123 const int sandbox_flags_;
122 ScopedVector<ZygoteForkDelegate> helpers_; 124 ScopedVector<ZygoteForkDelegate> helpers_;
123 125
124 // Count of how many fork delegates for which we've invoked InitialUMA(). 126 // Count of how many fork delegates for which we've invoked InitialUMA().
125 size_t initial_uma_index_; 127 size_t initial_uma_index_;
126 128
127 // This vector contains the PIDs of any child processes which have been 129 // This vector contains the PIDs of any child processes which have been
128 // created prior to the construction of the Zygote object, and must be reaped 130 // created prior to the construction of the Zygote object, and must be reaped
129 // before the Zygote exits. The Zygote will perform a blocking wait on these 131 // before the Zygote exits. The Zygote will perform a blocking wait on these
130 // children, so they must be guaranteed to be exiting by the time the Zygote 132 // children, so they must be guaranteed to be exiting by the time the Zygote
131 // exits. 133 // exits.
132 std::vector<base::ProcessHandle> extra_children_; 134 std::vector<base::ProcessHandle> extra_children_;
133 135
134 // This vector contains the FDs that must be closed before reaping the extra 136 // This vector contains the FDs that must be closed before reaping the extra
135 // children. 137 // children.
136 std::vector<int> extra_fds_; 138 std::vector<int> extra_fds_;
137 }; 139 };
138 140
139 } // namespace content 141 } // namespace content
140 142
141 #endif // CONTENT_ZYGOTE_ZYGOTE_LINUX_H_ 143 #endif // CONTENT_ZYGOTE_ZYGOTE_LINUX_H_
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