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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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176 // permissions. | 176 // permissions. |
177 static intptr_t CommitPageSize(); | 177 static intptr_t CommitPageSize(); |
178 | 178 |
179 // Mark code segments non-writable. | 179 // Mark code segments non-writable. |
180 static void ProtectCode(void* address, const size_t size); | 180 static void ProtectCode(void* address, const size_t size); |
181 | 181 |
182 // Assign memory as a guard page so that access will cause an exception. | 182 // Assign memory as a guard page so that access will cause an exception. |
183 static void Guard(void* address, const size_t size); | 183 static void Guard(void* address, const size_t size); |
184 | 184 |
185 // Generate a random address to be used for hinting mmap(). | 185 // Generate a random address to be used for hinting mmap(). |
| 186 // TODO(cdn) these should be rolled into the same function but but this |
| 187 // patch needs to be easy to merge. |
186 static void* GetRandomMmapAddr(); | 188 static void* GetRandomMmapAddr(); |
| 189 static void* GetRandomAddr(); |
187 | 190 |
188 // Get the Alignment guaranteed by Allocate(). | 191 // Get the Alignment guaranteed by Allocate(). |
189 static size_t AllocateAlignment(); | 192 static size_t AllocateAlignment(); |
190 | 193 |
191 // Returns an indication of whether a pointer is in a space that | 194 // Returns an indication of whether a pointer is in a space that |
192 // has been allocated by Allocate(). This method may conservatively | 195 // has been allocated by Allocate(). This method may conservatively |
193 // always return false, but giving more accurate information may | 196 // always return false, but giving more accurate information may |
194 // improve the robustness of the stack dump code in the presence of | 197 // improve the robustness of the stack dump code in the presence of |
195 // heap corruption. | 198 // heap corruption. |
196 static bool IsOutsideAllocatedSpace(void* pointer); | 199 static bool IsOutsideAllocatedSpace(void* pointer); |
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694 Atomic32 active_; | 697 Atomic32 active_; |
695 PlatformData* data_; // Platform specific data. | 698 PlatformData* data_; // Platform specific data. |
696 int samples_taken_; // Counts stack samples taken. | 699 int samples_taken_; // Counts stack samples taken. |
697 DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler); | 700 DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler); |
698 }; | 701 }; |
699 | 702 |
700 | 703 |
701 } } // namespace v8::internal | 704 } } // namespace v8::internal |
702 | 705 |
703 #endif // V8_PLATFORM_H_ | 706 #endif // V8_PLATFORM_H_ |
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