Line data Source code
1 : // Copyright 2015 the V8 project authors. All rights reserved.
2 : // Use of this source code is governed by a BSD-style license that can be
3 : // found in the LICENSE file.
4 :
5 : #include "src/runtime/runtime-utils.h"
6 :
7 : #include <iomanip>
8 :
9 : #include "src/arguments.h"
10 : #include "src/frames-inl.h"
11 : #include "src/interpreter/bytecode-array-iterator.h"
12 : #include "src/interpreter/bytecode-decoder.h"
13 : #include "src/interpreter/bytecode-flags.h"
14 : #include "src/interpreter/bytecode-register.h"
15 : #include "src/interpreter/bytecodes.h"
16 : #include "src/isolate-inl.h"
17 : #include "src/ostreams.h"
18 :
19 : namespace v8 {
20 : namespace internal {
21 :
22 22736418 : RUNTIME_FUNCTION(Runtime_InterpreterNewClosure) {
23 7578804 : HandleScope scope(isolate);
24 : DCHECK_EQ(4, args.length());
25 15157608 : CONVERT_ARG_HANDLE_CHECKED(SharedFunctionInfo, shared, 0);
26 15157610 : CONVERT_ARG_HANDLE_CHECKED(FeedbackVector, vector, 1);
27 15157614 : CONVERT_SMI_ARG_CHECKED(index, 2);
28 15157614 : CONVERT_SMI_ARG_CHECKED(pretenured_flag, 3);
29 7578807 : Handle<Context> context(isolate->context(), isolate);
30 7578802 : FeedbackSlot slot = FeedbackVector::ToSlot(index);
31 7578802 : Handle<Cell> vector_cell(Cell::cast(vector->Get(slot)), isolate);
32 : return *isolate->factory()->NewFunctionFromSharedFunctionInfo(
33 : shared, context, vector_cell,
34 15157615 : static_cast<PretenureFlag>(pretenured_flag));
35 : }
36 :
37 : namespace {
38 :
39 0 : void AdvanceToOffsetForTracing(
40 : interpreter::BytecodeArrayIterator& bytecode_iterator, int offset) {
41 0 : while (bytecode_iterator.current_offset() +
42 0 : bytecode_iterator.current_bytecode_size() <=
43 : offset) {
44 0 : bytecode_iterator.Advance();
45 : }
46 : DCHECK(bytecode_iterator.current_offset() == offset ||
47 : ((bytecode_iterator.current_offset() + 1) == offset &&
48 : bytecode_iterator.current_operand_scale() >
49 : interpreter::OperandScale::kSingle));
50 0 : }
51 :
52 0 : void PrintRegisters(std::ostream& os, bool is_input,
53 : interpreter::BytecodeArrayIterator& bytecode_iterator,
54 : Handle<Object> accumulator) {
55 : static const char kAccumulator[] = "accumulator";
56 : static const int kRegFieldWidth = static_cast<int>(sizeof(kAccumulator) - 1);
57 : static const char* kInputColourCode = "\033[0;36m";
58 : static const char* kOutputColourCode = "\033[0;35m";
59 : static const char* kNormalColourCode = "\033[0;m";
60 0 : const char* kArrowDirection = is_input ? " -> " : " <- ";
61 0 : if (FLAG_log_colour) {
62 0 : os << (is_input ? kInputColourCode : kOutputColourCode);
63 : }
64 :
65 0 : interpreter::Bytecode bytecode = bytecode_iterator.current_bytecode();
66 :
67 : // Print accumulator.
68 0 : if ((is_input && interpreter::Bytecodes::ReadsAccumulator(bytecode)) ||
69 0 : (!is_input && interpreter::Bytecodes::WritesAccumulator(bytecode))) {
70 0 : os << " [ " << kAccumulator << kArrowDirection;
71 0 : accumulator->ShortPrint();
72 0 : os << " ]" << std::endl;
73 : }
74 :
75 : // Print the registers.
76 : JavaScriptFrameIterator frame_iterator(
77 0 : bytecode_iterator.bytecode_array()->GetIsolate());
78 : InterpretedFrame* frame =
79 : reinterpret_cast<InterpretedFrame*>(frame_iterator.frame());
80 : int operand_count = interpreter::Bytecodes::NumberOfOperands(bytecode);
81 0 : for (int operand_index = 0; operand_index < operand_count; operand_index++) {
82 : interpreter::OperandType operand_type =
83 : interpreter::Bytecodes::GetOperandType(bytecode, operand_index);
84 : bool should_print =
85 : is_input
86 : ? interpreter::Bytecodes::IsRegisterInputOperandType(operand_type)
87 0 : : interpreter::Bytecodes::IsRegisterOutputOperandType(operand_type);
88 0 : if (should_print) {
89 : interpreter::Register first_reg =
90 0 : bytecode_iterator.GetRegisterOperand(operand_index);
91 0 : int range = bytecode_iterator.GetRegisterOperandRange(operand_index);
92 0 : for (int reg_index = first_reg.index();
93 0 : reg_index < first_reg.index() + range; reg_index++) {
94 0 : Object* reg_object = frame->ReadInterpreterRegister(reg_index);
95 0 : os << " [ " << std::setw(kRegFieldWidth)
96 : << interpreter::Register(reg_index).ToString(
97 0 : bytecode_iterator.bytecode_array()->parameter_count())
98 0 : << kArrowDirection;
99 0 : reg_object->ShortPrint(os);
100 0 : os << " ]" << std::endl;
101 : }
102 : }
103 : }
104 0 : if (FLAG_log_colour) {
105 0 : os << kNormalColourCode;
106 : }
107 0 : }
108 :
109 : } // namespace
110 :
111 0 : RUNTIME_FUNCTION(Runtime_InterpreterTraceBytecodeEntry) {
112 : SealHandleScope shs(isolate);
113 : DCHECK_EQ(3, args.length());
114 0 : CONVERT_ARG_HANDLE_CHECKED(BytecodeArray, bytecode_array, 0);
115 0 : CONVERT_SMI_ARG_CHECKED(bytecode_offset, 1);
116 0 : CONVERT_ARG_HANDLE_CHECKED(Object, accumulator, 2);
117 0 : OFStream os(stdout);
118 :
119 0 : int offset = bytecode_offset - BytecodeArray::kHeaderSize + kHeapObjectTag;
120 0 : interpreter::BytecodeArrayIterator bytecode_iterator(bytecode_array);
121 0 : AdvanceToOffsetForTracing(bytecode_iterator, offset);
122 0 : if (offset == bytecode_iterator.current_offset()) {
123 : // Print bytecode.
124 0 : const uint8_t* base_address = bytecode_array->GetFirstBytecodeAddress();
125 0 : const uint8_t* bytecode_address = base_address + offset;
126 0 : os << " -> " << static_cast<const void*>(bytecode_address) << " @ "
127 0 : << std::setw(4) << offset << " : ";
128 : interpreter::BytecodeDecoder::Decode(os, bytecode_address,
129 0 : bytecode_array->parameter_count());
130 0 : os << std::endl;
131 : // Print all input registers and accumulator.
132 0 : PrintRegisters(os, true, bytecode_iterator, accumulator);
133 :
134 0 : os << std::flush;
135 : }
136 0 : return isolate->heap()->undefined_value();
137 : }
138 :
139 0 : RUNTIME_FUNCTION(Runtime_InterpreterTraceBytecodeExit) {
140 : SealHandleScope shs(isolate);
141 : DCHECK_EQ(3, args.length());
142 0 : CONVERT_ARG_HANDLE_CHECKED(BytecodeArray, bytecode_array, 0);
143 0 : CONVERT_SMI_ARG_CHECKED(bytecode_offset, 1);
144 0 : CONVERT_ARG_HANDLE_CHECKED(Object, accumulator, 2);
145 :
146 0 : int offset = bytecode_offset - BytecodeArray::kHeaderSize + kHeapObjectTag;
147 0 : interpreter::BytecodeArrayIterator bytecode_iterator(bytecode_array);
148 0 : AdvanceToOffsetForTracing(bytecode_iterator, offset);
149 : // The offset comparison here ensures registers only printed when the
150 : // (potentially) widened bytecode has completed. The iterator reports
151 : // the offset as the offset of the prefix bytecode.
152 0 : if (bytecode_iterator.current_operand_scale() ==
153 0 : interpreter::OperandScale::kSingle ||
154 0 : offset > bytecode_iterator.current_offset()) {
155 0 : OFStream os(stdout);
156 : // Print all output registers and accumulator.
157 0 : PrintRegisters(os, false, bytecode_iterator, accumulator);
158 0 : os << std::flush;
159 : }
160 0 : return isolate->heap()->undefined_value();
161 : }
162 :
163 196154 : RUNTIME_FUNCTION(Runtime_InterpreterAdvanceBytecodeOffset) {
164 : SealHandleScope shs(isolate);
165 : DCHECK_EQ(2, args.length());
166 196154 : CONVERT_ARG_HANDLE_CHECKED(BytecodeArray, bytecode_array, 0);
167 196154 : CONVERT_SMI_ARG_CHECKED(bytecode_offset, 1);
168 98077 : interpreter::BytecodeArrayIterator it(bytecode_array);
169 98077 : int offset = bytecode_offset - BytecodeArray::kHeaderSize + kHeapObjectTag;
170 1014345 : while (it.current_offset() < offset) it.Advance();
171 : DCHECK_EQ(offset, it.current_offset());
172 98077 : it.Advance(); // Advance by one bytecode.
173 98077 : offset = it.current_offset() + BytecodeArray::kHeaderSize - kHeapObjectTag;
174 98077 : return Smi::FromInt(offset);
175 : }
176 :
177 : } // namespace internal
178 : } // namespace v8
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