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Issue 193057: Cleaned up some debugger stuff on ia32 and x64 (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 11 years, 3 months ago
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1 // Copyright 2009 the V8 project authors. All rights reserved. 1 // Copyright 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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373 373
374 // Allocation support helpers. 374 // Allocation support helpers.
375 void LoadAllocationTopHelper(Register result, 375 void LoadAllocationTopHelper(Register result,
376 Register result_end, 376 Register result_end,
377 Register scratch, 377 Register scratch,
378 AllocationFlags flags); 378 AllocationFlags flags);
379 void UpdateAllocationTopHelper(Register result_end, Register scratch); 379 void UpdateAllocationTopHelper(Register result_end, Register scratch);
380 }; 380 };
381 381
382 382
383 // The code patcher is used to patch (typically) small parts of code e.g. for
384 // debugging and other types of instrumentation. When using the code patcher
385 // the exact number of bytes specified must be emitted. Is not legal to emit
386 // relocation information. If any of these constraints are violated it causes
387 // an assertion.
388 class CodePatcher {
389 public:
390 CodePatcher(byte* address, int size);
391 virtual ~CodePatcher();
392
393 // Macro assembler to emit code.
394 MacroAssembler* masm() { return &masm_; }
395
396 private:
397 byte* address_; // The address of the code being patched.
398 int size_; // Number of bytes of the expected patch size.
399 MacroAssembler masm_; // Macro assembler used to generate the code.
400 };
401
402
403 // ----------------------------------------------------------------------------- 383 // -----------------------------------------------------------------------------
404 // Static helper functions. 384 // Static helper functions.
405 385
406 // Generate an Operand for loading a field from an object. 386 // Generate an Operand for loading a field from an object.
407 static inline Operand FieldOperand(Register object, int offset) { 387 static inline Operand FieldOperand(Register object, int offset) {
408 return Operand(object, offset - kHeapObjectTag); 388 return Operand(object, offset - kHeapObjectTag);
409 } 389 }
410 390
411 391
412 // Generate an Operand for loading an indexed field from an object. 392 // Generate an Operand for loading an indexed field from an object.
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436 } \ 416 } \
437 masm-> 417 masm->
438 #else 418 #else
439 #define ACCESS_MASM(masm) masm-> 419 #define ACCESS_MASM(masm) masm->
440 #endif 420 #endif
441 421
442 422
443 } } // namespace v8::internal 423 } } // namespace v8::internal
444 424
445 #endif // V8_X64_MACRO_ASSEMBLER_X64_H_ 425 #endif // V8_X64_MACRO_ASSEMBLER_X64_H_
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