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Issue 47023003: Avoid pre-aging when debugger is active (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Introduce IsCodePreAgingAcitve Created 7 years, 1 month ago
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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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28 #include <limits.h> // For LONG_MIN, LONG_MAX. 28 #include <limits.h> // For LONG_MIN, LONG_MAX.
29 29
30 #include "v8.h" 30 #include "v8.h"
31 31
32 #if V8_TARGET_ARCH_MIPS 32 #if V8_TARGET_ARCH_MIPS
33 33
34 #include "bootstrapper.h" 34 #include "bootstrapper.h"
35 #include "codegen.h" 35 #include "codegen.h"
36 #include "cpu-profiler.h" 36 #include "cpu-profiler.h"
37 #include "debug.h" 37 #include "debug.h"
38 #include "isolate-inl.h"
38 #include "runtime.h" 39 #include "runtime.h"
39 40
40 namespace v8 { 41 namespace v8 {
41 namespace internal { 42 namespace internal {
42 43
43 MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size) 44 MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size)
44 : Assembler(arg_isolate, buffer, size), 45 : Assembler(arg_isolate, buffer, size),
45 generating_stub_(false), 46 generating_stub_(false),
46 allow_stub_calls_(true), 47 allow_stub_calls_(true),
47 has_frame_(false) { 48 has_frame_(false) {
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4589 if (frame_mode == BUILD_STUB_FRAME) { 4590 if (frame_mode == BUILD_STUB_FRAME) {
4590 Push(ra, fp, cp); 4591 Push(ra, fp, cp);
4591 Push(Smi::FromInt(StackFrame::STUB)); 4592 Push(Smi::FromInt(StackFrame::STUB));
4592 // Adjust FP to point to saved FP. 4593 // Adjust FP to point to saved FP.
4593 Addu(fp, sp, Operand(2 * kPointerSize)); 4594 Addu(fp, sp, Operand(2 * kPointerSize));
4594 } else { 4595 } else {
4595 PredictableCodeSizeScope predictible_code_size_scope( 4596 PredictableCodeSizeScope predictible_code_size_scope(
4596 this, kNoCodeAgeSequenceLength * Assembler::kInstrSize); 4597 this, kNoCodeAgeSequenceLength * Assembler::kInstrSize);
4597 // The following three instructions must remain together and unmodified 4598 // The following three instructions must remain together and unmodified
4598 // for code aging to work properly. 4599 // for code aging to work properly.
4599 if (FLAG_optimize_for_size && FLAG_age_code) { 4600 if (isolate()->IsCodePreAgingActive()) {
4600 // Pre-age the code. 4601 // Pre-age the code.
4601 Code* stub = Code::GetPreAgedCodeAgeStub(isolate()); 4602 Code* stub = Code::GetPreAgedCodeAgeStub(isolate());
4602 nop(Assembler::CODE_AGE_MARKER_NOP); 4603 nop(Assembler::CODE_AGE_MARKER_NOP);
4603 // Save the function's original return address 4604 // Save the function's original return address
4604 // (it will be clobbered by Call(t9)) 4605 // (it will be clobbered by Call(t9))
4605 mov(at, ra); 4606 mov(at, ra);
4606 // Load the stub address to t9 and call it 4607 // Load the stub address to t9 and call it
4607 li(t9, 4608 li(t9,
4608 Operand(reinterpret_cast<uint32_t>(stub->instruction_start()))); 4609 Operand(reinterpret_cast<uint32_t>(stub->instruction_start())));
4609 Call(t9); 4610 Call(t9);
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5709 opcode == BGTZL); 5710 opcode == BGTZL);
5710 opcode = (cond == eq) ? BEQ : BNE; 5711 opcode = (cond == eq) ? BEQ : BNE;
5711 instr = (instr & ~kOpcodeMask) | opcode; 5712 instr = (instr & ~kOpcodeMask) | opcode;
5712 masm_.emit(instr); 5713 masm_.emit(instr);
5713 } 5714 }
5714 5715
5715 5716
5716 } } // namespace v8::internal 5717 } } // namespace v8::internal
5717 5718
5718 #endif // V8_TARGET_ARCH_MIPS 5719 #endif // V8_TARGET_ARCH_MIPS
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