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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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 if (isolate()->IsDebuggerActive()) { | 331 if (isolate()->IsDebuggerActive()) { |
| 332 // Detect debug break requests as soon as possible. | 332 // Detect debug break requests as soon as possible. |
| 333 reset_value = FLAG_interrupt_budget >> 4; | 333 reset_value = FLAG_interrupt_budget >> 4; |
| 334 } | 334 } |
| 335 __ mov(r2, Operand(profiling_counter_)); | 335 __ mov(r2, Operand(profiling_counter_)); |
| 336 __ mov(r3, Operand(Smi::FromInt(reset_value))); | 336 __ mov(r3, Operand(Smi::FromInt(reset_value))); |
| 337 __ str(r3, FieldMemOperand(r2, JSGlobalPropertyCell::kValueOffset)); | 337 __ str(r3, FieldMemOperand(r2, JSGlobalPropertyCell::kValueOffset)); |
| 338 } | 338 } |
| 339 | 339 |
| 340 | 340 |
| 341 static const int kMaxBackEdgeWeight = 127; | 341 const int FullCodeGenerator::kMaxBackEdgeWeight = 127; |
| 342 static const int kBackEdgeDistanceDivisor = 142; | 342 const int FullCodeGenerator::kBackEdgeDistanceUnit = 142; |
| 343 | 343 |
| 344 | 344 |
| 345 void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt, | 345 void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt, |
| 346 Label* back_edge_target) { | 346 Label* back_edge_target) { |
| 347 Comment cmnt(masm_, "[ Stack check"); | 347 Comment cmnt(masm_, "[ Stack check"); |
| 348 // Block literal pools whilst emitting stack check code. | 348 // Block literal pools whilst emitting stack check code. |
| 349 Assembler::BlockConstPoolScope block_const_pool(masm_); | 349 Assembler::BlockConstPoolScope block_const_pool(masm_); |
| 350 Label ok; | 350 Label ok; |
| 351 | 351 |
| 352 if (FLAG_count_based_interrupts) { | 352 if (FLAG_count_based_interrupts) { |
| 353 int weight = 1; | 353 int weight = 1; |
| 354 if (FLAG_weighted_back_edges) { | 354 if (FLAG_weighted_back_edges) { |
| 355 ASSERT(back_edge_target->is_bound()); | 355 ASSERT(back_edge_target->is_bound()); |
| 356 int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target); | 356 int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target); |
| 357 weight = Min(kMaxBackEdgeWeight, | 357 weight = Min(kMaxBackEdgeWeight, |
| 358 Max(1, distance / kBackEdgeDistanceDivisor)); | 358 Max(1, distance / kBackEdgeDistanceUnit)); |
| 359 } | 359 } |
| 360 EmitProfilingCounterDecrement(weight); | 360 EmitProfilingCounterDecrement(weight); |
| 361 __ b(pl, &ok); | 361 __ b(pl, &ok); |
| 362 InterruptStub stub; | 362 InterruptStub stub; |
| 363 __ CallStub(&stub); | 363 __ CallStub(&stub); |
| 364 } else { | 364 } else { |
| 365 __ LoadRoot(ip, Heap::kStackLimitRootIndex); | 365 __ LoadRoot(ip, Heap::kStackLimitRootIndex); |
| 366 __ cmp(sp, Operand(ip)); | 366 __ cmp(sp, Operand(ip)); |
| 367 __ b(hs, &ok); | 367 __ b(hs, &ok); |
| 368 StackCheckStub stub; | 368 StackCheckStub stub; |
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| 400 __ CallRuntime(Runtime::kTraceExit, 1); | 400 __ CallRuntime(Runtime::kTraceExit, 1); |
| 401 } | 401 } |
| 402 if (FLAG_interrupt_at_exit || FLAG_self_optimization) { | 402 if (FLAG_interrupt_at_exit || FLAG_self_optimization) { |
| 403 // Pretend that the exit is a backwards jump to the entry. | 403 // Pretend that the exit is a backwards jump to the entry. |
| 404 int weight = 1; | 404 int weight = 1; |
| 405 if (info_->ShouldSelfOptimize()) { | 405 if (info_->ShouldSelfOptimize()) { |
| 406 weight = FLAG_interrupt_budget / FLAG_self_opt_count; | 406 weight = FLAG_interrupt_budget / FLAG_self_opt_count; |
| 407 } else if (FLAG_weighted_back_edges) { | 407 } else if (FLAG_weighted_back_edges) { |
| 408 int distance = masm_->pc_offset(); | 408 int distance = masm_->pc_offset(); |
| 409 weight = Min(kMaxBackEdgeWeight, | 409 weight = Min(kMaxBackEdgeWeight, |
| 410 Max(1, distance / kBackEdgeDistanceDivisor)); | 410 Max(1, distance / kBackEdgeDistanceUnit)); |
| 411 } | 411 } |
| 412 EmitProfilingCounterDecrement(weight); | 412 EmitProfilingCounterDecrement(weight); |
| 413 Label ok; | 413 Label ok; |
| 414 __ b(pl, &ok); | 414 __ b(pl, &ok); |
| 415 __ push(r0); | 415 __ push(r0); |
| 416 if (info_->ShouldSelfOptimize() && FLAG_direct_self_opt) { | 416 if (info_->ShouldSelfOptimize() && FLAG_direct_self_opt) { |
| 417 __ ldr(r2, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); | 417 __ ldr(r2, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| 418 __ push(r2); | 418 __ push(r2); |
| 419 __ CallRuntime(Runtime::kOptimizeFunctionOnNextCall, 1); | 419 __ CallRuntime(Runtime::kOptimizeFunctionOnNextCall, 1); |
| 420 } else { | 420 } else { |
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| 4581 *context_length = 0; | 4581 *context_length = 0; |
| 4582 return previous_; | 4582 return previous_; |
| 4583 } | 4583 } |
| 4584 | 4584 |
| 4585 | 4585 |
| 4586 #undef __ | 4586 #undef __ |
| 4587 | 4587 |
| 4588 } } // namespace v8::internal | 4588 } } // namespace v8::internal |
| 4589 | 4589 |
| 4590 #endif // V8_TARGET_ARCH_ARM | 4590 #endif // V8_TARGET_ARCH_ARM |
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