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1 // Copyright 2006-2009 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2009 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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331 | 331 |
332 // Allocation support helpers. | 332 // Allocation support helpers. |
333 void LoadAllocationTopHelper(Register result, | 333 void LoadAllocationTopHelper(Register result, |
334 Register result_end, | 334 Register result_end, |
335 Register scratch, | 335 Register scratch, |
336 AllocationFlags flags); | 336 AllocationFlags flags); |
337 void UpdateAllocationTopHelper(Register result_end, Register scratch); | 337 void UpdateAllocationTopHelper(Register result_end, Register scratch); |
338 }; | 338 }; |
339 | 339 |
340 | 340 |
| 341 #ifdef ENABLE_DEBUGGER_SUPPORT |
341 // The code patcher is used to patch (typically) small parts of code e.g. for | 342 // The code patcher is used to patch (typically) small parts of code e.g. for |
342 // debugging and other types of instrumentation. When using the code patcher | 343 // debugging and other types of instrumentation. When using the code patcher |
343 // the exact number of bytes specified must be emitted. Is not legal to emit | 344 // the exact number of bytes specified must be emitted. Is not legal to emit |
344 // relocation information. If any of these constraints are violated it causes | 345 // relocation information. If any of these constraints are violated it causes |
345 // an assertion. | 346 // an assertion. |
346 class CodePatcher { | 347 class CodePatcher { |
347 public: | 348 public: |
348 CodePatcher(byte* address, int size); | 349 CodePatcher(byte* address, int size); |
349 virtual ~CodePatcher(); | 350 virtual ~CodePatcher(); |
350 | 351 |
351 // Macro assembler to emit code. | 352 // Macro assembler to emit code. |
352 MacroAssembler* masm() { return &masm_; } | 353 MacroAssembler* masm() { return &masm_; } |
353 | 354 |
354 private: | 355 private: |
355 byte* address_; // The address of the code being patched. | 356 byte* address_; // The address of the code being patched. |
356 int size_; // Number of bytes of the expected patch size. | 357 int size_; // Number of bytes of the expected patch size. |
357 MacroAssembler masm_; // Macro assembler used to generate the code. | 358 MacroAssembler masm_; // Macro assembler used to generate the code. |
358 }; | 359 }; |
| 360 #endif // ENABLE_DEBUGGER_SUPPORT |
359 | 361 |
360 | 362 |
361 // ----------------------------------------------------------------------------- | 363 // ----------------------------------------------------------------------------- |
362 // Static helper functions. | 364 // Static helper functions. |
363 | 365 |
364 // Generate an Operand for loading a field from an object. | 366 // Generate an Operand for loading a field from an object. |
365 static inline Operand FieldOperand(Register object, int offset) { | 367 static inline Operand FieldOperand(Register object, int offset) { |
366 return Operand(object, offset - kHeapObjectTag); | 368 return Operand(object, offset - kHeapObjectTag); |
367 } | 369 } |
368 | 370 |
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394 } \ | 396 } \ |
395 masm-> | 397 masm-> |
396 #else | 398 #else |
397 #define ACCESS_MASM(masm) masm-> | 399 #define ACCESS_MASM(masm) masm-> |
398 #endif | 400 #endif |
399 | 401 |
400 | 402 |
401 } } // namespace v8::internal | 403 } } // namespace v8::internal |
402 | 404 |
403 #endif // V8_IA32_MACRO_ASSEMBLER_IA32_H_ | 405 #endif // V8_IA32_MACRO_ASSEMBLER_IA32_H_ |
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