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1 // Copyright (c) 1994-2006 Sun Microsystems Inc. | 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. |
2 // All Rights Reserved. | 2 // All Rights Reserved. |
3 // | 3 // |
4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
5 // modification, are permitted provided that the following conditions | 5 // modification, are permitted provided that the following conditions |
6 // are met: | 6 // are met: |
7 // | 7 // |
8 // - Redistributions of source code must retain the above copyright notice, | 8 // - Redistributions of source code must retain the above copyright notice, |
9 // this list of conditions and the following disclaimer. | 9 // this list of conditions and the following disclaimer. |
10 // | 10 // |
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294 // Emit a single byte. Must always be inlined. | 294 // Emit a single byte. Must always be inlined. |
295 #define EMIT(x) \ | 295 #define EMIT(x) \ |
296 *pc_++ = (x) | 296 *pc_++ = (x) |
297 | 297 |
298 | 298 |
299 #ifdef GENERATED_CODE_COVERAGE | 299 #ifdef GENERATED_CODE_COVERAGE |
300 static void InitCoverageLog(); | 300 static void InitCoverageLog(); |
301 #endif | 301 #endif |
302 | 302 |
303 Assembler::Assembler(Isolate* isolate, void* buffer, int buffer_size) | 303 Assembler::Assembler(Isolate* isolate, void* buffer, int buffer_size) |
304 : AssemblerBase(isolate, buffer, buffer_size), | 304 : AssemblerBase(isolate, buffer, buffer_size) { |
305 positions_recorder_(this) { | 305 // Clear the buffer in debug mode unless it was provided by the |
306 // Clear the buffer in debug mode unless it was provided by the | 306 // caller in which case we can't be sure it's okay to overwrite |
307 // caller in which case we can't be sure it's okay to overwrite | 307 // existing code in it; see CodePatcher::CodePatcher(...). |
308 // existing code in it; see CodePatcher::CodePatcher(...). | |
309 #ifdef DEBUG | 308 #ifdef DEBUG |
310 if (own_buffer_) { | 309 if (own_buffer_) { |
311 memset(buffer_, 0xCC, buffer_size_); // int3 | 310 memset(buffer_, 0xCC, buffer_size_); // int3 |
312 } | 311 } |
313 #endif | 312 #endif |
314 | 313 |
315 reloc_info_writer.Reposition(buffer_ + buffer_size_, pc_); | 314 reloc_info_writer.Reposition(buffer_ + buffer_size_, pc_); |
316 | 315 |
317 #ifdef GENERATED_CODE_COVERAGE | 316 #ifdef GENERATED_CODE_COVERAGE |
318 InitCoverageLog(); | 317 InitCoverageLog(); |
319 #endif | 318 #endif |
320 } | 319 } |
321 | 320 |
322 | 321 |
323 void Assembler::GetCode(CodeDesc* desc) { | 322 void Assembler::GetCode(CodeDesc* desc) { |
324 // Finalize code (at this point overflow() may be true, but the gap ensures | 323 // Finalize code (at this point overflow() may be true, but the gap ensures |
325 // that we are still not overlapping instructions and relocation info). | 324 // that we are still not overlapping instructions and relocation info). |
326 reloc_info_writer.Finish(); | |
327 DCHECK(pc_ <= reloc_info_writer.pos()); // No overlap. | 325 DCHECK(pc_ <= reloc_info_writer.pos()); // No overlap. |
328 // Set up code descriptor. | 326 // Set up code descriptor. |
329 desc->buffer = buffer_; | 327 desc->buffer = buffer_; |
330 desc->buffer_size = buffer_size_; | 328 desc->buffer_size = buffer_size_; |
331 desc->instr_size = pc_offset(); | 329 desc->instr_size = pc_offset(); |
332 desc->reloc_size = (buffer_ + buffer_size_) - reloc_info_writer.pos(); | 330 desc->reloc_size = (buffer_ + buffer_size_) - reloc_info_writer.pos(); |
333 desc->origin = this; | 331 desc->origin = this; |
334 desc->constant_pool_size = 0; | 332 desc->constant_pool_size = 0; |
335 desc->unwinding_info_size = 0; | 333 desc->unwinding_info_size = 0; |
336 desc->unwinding_info = nullptr; | 334 desc->unwinding_info = nullptr; |
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3074 fflush(coverage_log); | 3072 fflush(coverage_log); |
3075 } | 3073 } |
3076 } | 3074 } |
3077 | 3075 |
3078 #endif | 3076 #endif |
3079 | 3077 |
3080 } // namespace internal | 3078 } // namespace internal |
3081 } // namespace v8 | 3079 } // namespace v8 |
3082 | 3080 |
3083 #endif // V8_TARGET_ARCH_IA32 | 3081 #endif // V8_TARGET_ARCH_IA32 |
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