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1 // Copyright (c) 2006-2010 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 // Defines InterceptionManager, the class in charge of setting up interceptions | |
6 // for the sandboxed process. For more details see: | |
7 // http://dev.chromium.org/developers/design-documents/sandbox . | |
8 | |
9 #ifndef SANDBOX_SRC_INTERCEPTION_INTERNAL_H_ | |
10 #define SANDBOX_SRC_INTERCEPTION_INTERNAL_H_ | |
11 | |
12 #include "sandbox/src/sandbox_types.h" | |
13 | |
14 namespace sandbox { | |
15 | |
16 const int kMaxThunkDataBytes = 64; | |
17 | |
18 enum InterceptorId; | |
19 | |
20 // The following structures contain variable size fields at the end, and will be | |
21 // used to transfer information between two processes. In order to guarantee | |
22 // our ability to follow the chain of structures, the alignment should be fixed, | |
23 // hence this pragma. | |
24 #pragma pack(push, 4) | |
25 | |
26 // Structures for the shared memory that contains patching information | |
27 // for the InterceptionAgent. | |
28 // A single interception: | |
29 struct FunctionInfo { | |
30 size_t record_bytes; // rounded to sizeof(size_t) bytes | |
31 InterceptionType type; | |
32 InterceptorId id; | |
33 const void* interceptor_address; | |
34 char function[1]; // placeholder for null terminated name | |
35 // char interceptor[] // followed by the interceptor function | |
36 }; | |
37 | |
38 // A single dll: | |
39 struct DllPatchInfo { | |
40 size_t record_bytes; // rounded to sizeof(size_t) bytes | |
41 size_t offset_to_functions; | |
42 int num_functions; | |
43 bool unload_module; | |
44 wchar_t dll_name[1]; // placeholder for null terminated name | |
45 // FunctionInfo function_info[] // followed by the functions to intercept | |
46 }; | |
47 | |
48 // All interceptions: | |
49 struct SharedMemory { | |
50 int num_intercepted_dlls; | |
51 void* interceptor_base; | |
52 DllPatchInfo dll_list[1]; // placeholder for the list of dlls | |
53 }; | |
54 | |
55 // Dummy single thunk: | |
56 struct ThunkData { | |
57 char data[kMaxThunkDataBytes]; | |
58 }; | |
59 | |
60 // In-memory representation of the interceptions for a given dll: | |
61 struct DllInterceptionData { | |
62 size_t data_bytes; | |
63 size_t used_bytes; | |
64 void* base; | |
65 int num_thunks; | |
66 #if defined(_WIN64) | |
67 int dummy; // Improve alignment. | |
68 #endif | |
69 ThunkData thunks[1]; | |
70 }; | |
71 | |
72 #pragma pack(pop) | |
73 | |
74 } // namespace sandbox | |
75 | |
76 #endif // SANDBOX_SRC_INTERCEPTION_INTERNAL_H_ | |
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