| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| // Class for patching compiled code. |
| |
| #ifndef VM_CODE_PATCHER_H_ |
| #define VM_CODE_PATCHER_H_ |
| |
| #include "vm/allocation.h" |
| |
| namespace dart { |
| |
| // Forward declaration. |
| class Array; |
| class Code; |
| class ExternalLabel; |
| class Function; |
| class ICData; |
| class RawArray; |
| class RawICData; |
| class String; |
| |
| class CodePatcher : public AllStatic { |
| public: |
| // Dart static calls have a distinct, machine-dependent code pattern. |
| |
| // Patch static call before return_address in given code to the new target. |
| static void PatchStaticCallAt(uword return_address, |
| const Code& code, |
| uword new_target_address); |
| |
| // Patch instance call before return_address in given code to the new target. |
| static void PatchInstanceCallAt(uword return_address, |
| const Code& code, |
| uword new_target_address); |
| |
| // Patch entry point with a jump as specified in the code's patch region. |
| static void PatchEntry(const Code& code); |
| |
| // Restore entry point with original code (i.e., before patching). |
| static void RestoreEntry(const Code& code); |
| |
| // Returns true if the code can be patched with a jump at beginnning (checks |
| // that there are no conflicts with object pointers). Used in ASSERTs. |
| static bool CodeIsPatchable(const Code& code); |
| |
| // Return the target address of the static call before return_address |
| // in given code. |
| static uword GetStaticCallTargetAt(uword return_address, const Code& code); |
| |
| // Get instance call information. Returns the call target and sets each |
| // of the output parameters ic_data and arguments_descriptor if they are |
| // non-NULL. |
| static uword GetInstanceCallAt(uword return_address, |
| const Code& code, |
| ICData* ic_data, |
| Array* arguments_descriptor); |
| |
| static intptr_t InstanceCallSizeInBytes(); |
| |
| static void InsertCallAt(uword start, uword target); |
| }; |
| |
| } // namespace dart |
| |
| #endif // VM_CODE_PATCHER_H_ |