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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_H_ | 5 #ifndef CONTENT_ZYGOTE_ZYGOTE_H_ |
6 #define CONTENT_ZYGOTE_ZYGOTE_H_ | 6 #define CONTENT_ZYGOTE_ZYGOTE_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 | 9 |
10 #include <string> | 10 #include <string> |
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54 // Returns true if the SUID sandbox is active. | 54 // Returns true if the SUID sandbox is active. |
55 bool UsingSUIDSandbox() const; | 55 bool UsingSUIDSandbox() const; |
56 | 56 |
57 // --------------------------------------------------------------------------- | 57 // --------------------------------------------------------------------------- |
58 // Requests from the browser... | 58 // Requests from the browser... |
59 | 59 |
60 // Read and process a request from the browser. Returns true if we are in a | 60 // Read and process a request from the browser. Returns true if we are in a |
61 // new process and thus need to unwind back into ChromeMain. | 61 // new process and thus need to unwind back into ChromeMain. |
62 bool HandleRequestFromBrowser(int fd); | 62 bool HandleRequestFromBrowser(int fd); |
63 | 63 |
64 void HandleReapRequest(int fd, PickleIterator iter); | 64 void HandleReapRequest(int fd, const Pickle& pickle, PickleIterator iter); |
65 | 65 |
66 // Get the termination status of |real_pid|. |real_pid| is the PID as it | 66 // Get the termination status of |real_pid|. |real_pid| is the PID as it |
67 // appears outside of the sandbox. | 67 // appears outside of the sandbox. |
68 // Return true if it managed to get the termination status and return the | 68 // Return true if it managed to get the termination status and return the |
69 // status in |status| and the exit code in |exit_code|. | 69 // status in |status| and the exit code in |exit_code|. |
70 bool GetTerminationStatus(base::ProcessHandle real_pid, bool known_dead, | 70 bool GetTerminationStatus(base::ProcessHandle real_pid, bool known_dead, |
71 base::TerminationStatus* status, | 71 base::TerminationStatus* status, |
72 int* exit_code); | 72 int* exit_code); |
73 | 73 |
74 void HandleGetTerminationStatus(int fd, | 74 void HandleGetTerminationStatus(int fd, |
| 75 const Pickle& pickle, |
75 PickleIterator iter); | 76 PickleIterator iter); |
76 | 77 |
77 // This is equivalent to fork(), except that, when using the SUID sandbox, it | 78 // This is equivalent to fork(), except that, when using the SUID sandbox, it |
78 // returns the real PID of the child process as it appears outside the | 79 // returns the real PID of the child process as it appears outside the |
79 // sandbox, rather than returning the PID inside the sandbox. The child's | 80 // sandbox, rather than returning the PID inside the sandbox. The child's |
80 // real PID is determined by having it call content::SendZygoteChildPing(int) | 81 // real PID is determined by having it call content::SendZygoteChildPing(int) |
81 // using the |pid_oracle| descriptor. | 82 // using the |pid_oracle| descriptor. |
82 // Finally, when using a ZygoteForkDelegate helper, |uma_name|, |uma_sample|, | 83 // Finally, when using a ZygoteForkDelegate helper, |uma_name|, |uma_sample|, |
83 // and |uma_boundary_value| may be set if the helper wants to make a UMA | 84 // and |uma_boundary_value| may be set if the helper wants to make a UMA |
84 // report via UMA_HISTOGRAM_ENUMERATION. | 85 // report via UMA_HISTOGRAM_ENUMERATION. |
85 int ForkWithRealPid(const std::string& process_type, | 86 int ForkWithRealPid(const std::string& process_type, |
86 const base::GlobalDescriptors::Mapping& fd_mapping, | 87 const base::GlobalDescriptors::Mapping& fd_mapping, |
87 const std::string& channel_id, | 88 const std::string& channel_id, |
88 base::ScopedFD pid_oracle, | 89 base::ScopedFD pid_oracle, |
89 std::string* uma_name, | 90 std::string* uma_name, |
90 int* uma_sample, | 91 int* uma_sample, |
91 int* uma_boundary_value); | 92 int* uma_boundary_value); |
92 | 93 |
93 // Unpacks process type and arguments from |iter| and forks a new process. | 94 // Unpacks process type and arguments from |pickle| and forks a new process. |
94 // Returns -1 on error, otherwise returns twice, returning 0 to the child | 95 // Returns -1 on error, otherwise returns twice, returning 0 to the child |
95 // process and the child process ID to the parent process, like fork(). | 96 // process and the child process ID to the parent process, like fork(). |
96 base::ProcessId ReadArgsAndFork(PickleIterator iter, | 97 base::ProcessId ReadArgsAndFork(const Pickle& pickle, |
| 98 PickleIterator iter, |
97 ScopedVector<base::ScopedFD> fds, | 99 ScopedVector<base::ScopedFD> fds, |
98 std::string* uma_name, | 100 std::string* uma_name, |
99 int* uma_sample, | 101 int* uma_sample, |
100 int* uma_boundary_value); | 102 int* uma_boundary_value); |
101 | 103 |
102 // Handle a 'fork' request from the browser: this means that the browser | 104 // Handle a 'fork' request from the browser: this means that the browser |
103 // wishes to start a new renderer. Returns true if we are in a new process, | 105 // wishes to start a new renderer. Returns true if we are in a new process, |
104 // otherwise writes the child_pid back to the browser via |fd|. Writes a | 106 // otherwise writes the child_pid back to the browser via |fd|. Writes a |
105 // child_pid of -1 on error. | 107 // child_pid of -1 on error. |
106 bool HandleForkRequest(int fd, | 108 bool HandleForkRequest(int fd, |
| 109 const Pickle& pickle, |
107 PickleIterator iter, | 110 PickleIterator iter, |
108 ScopedVector<base::ScopedFD> fds); | 111 ScopedVector<base::ScopedFD> fds); |
109 | 112 |
110 bool HandleGetSandboxStatus(int fd, | 113 bool HandleGetSandboxStatus(int fd, |
| 114 const Pickle& pickle, |
111 PickleIterator iter); | 115 PickleIterator iter); |
112 | 116 |
113 // The Zygote needs to keep some information about each process. Most | 117 // The Zygote needs to keep some information about each process. Most |
114 // 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 |
115 // 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 |
116 // ZygoteForkDelegate helper. | 120 // ZygoteForkDelegate helper. |
117 ZygoteProcessMap process_info_map_; | 121 ZygoteProcessMap process_info_map_; |
118 | 122 |
119 const int sandbox_flags_; | 123 const int sandbox_flags_; |
120 ScopedVector<ZygoteForkDelegate> helpers_; | 124 ScopedVector<ZygoteForkDelegate> helpers_; |
121 | 125 |
122 // 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(). |
123 size_t initial_uma_index_; | 127 size_t initial_uma_index_; |
124 | 128 |
125 // 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 |
126 // 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 |
127 // 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 |
128 // 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 |
129 // exits. | 133 // exits. |
130 std::vector<base::ProcessHandle> extra_children_; | 134 std::vector<base::ProcessHandle> extra_children_; |
131 | 135 |
132 // 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 |
133 // children. | 137 // children. |
134 std::vector<int> extra_fds_; | 138 std::vector<int> extra_fds_; |
135 }; | 139 }; |
136 | 140 |
137 } // namespace content | 141 } // namespace content |
138 | 142 |
139 #endif // CONTENT_ZYGOTE_ZYGOTE_H_ | 143 #endif // CONTENT_ZYGOTE_ZYGOTE_H_ |
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