1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
4 // met:
5 //
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28 #include "v8.h"
29
30 #include "bootstrapper.h"
31 #include "codegen.h"
32 #include "compiler.h"
33 #include "debug.h"
34 #include "prettyprinter.h"
35 #include "rewriter.h"
36 #include "runtime.h"
37 #include "stub-cache.h"
38
39 namespace v8 {
40 namespace internal {
41
42 #define __ ACCESS_MASM(masm_)
43
44 #ifdef DEBUG
45
Comment(MacroAssembler * masm,const char * msg)46 Comment::Comment(MacroAssembler* masm, const char* msg)
47 : masm_(masm), msg_(msg) {
48 __ RecordComment(msg);
49 }
50
51
~Comment()52 Comment::~Comment() {
53 if (msg_[0] == '[') __ RecordComment("]");
54 }
55
56 #endif // DEBUG
57
58 #undef __
59
60
MakeCodePrologue(CompilationInfo * info)61 void CodeGenerator::MakeCodePrologue(CompilationInfo* info) {
62 #ifdef DEBUG
63 bool print_source = false;
64 bool print_ast = false;
65 const char* ftype;
66
67 if (Isolate::Current()->bootstrapper()->IsActive()) {
68 print_source = FLAG_print_builtin_source;
69 print_ast = FLAG_print_builtin_ast;
70 ftype = "builtin";
71 } else {
72 print_source = FLAG_print_source;
73 print_ast = FLAG_print_ast;
74 ftype = "user-defined";
75 }
76
77 if (FLAG_trace_codegen || print_source || print_ast) {
78 PrintF("*** Generate code for %s function: ", ftype);
79 info->function()->name()->ShortPrint();
80 PrintF(" ***\n");
81 }
82
83 if (print_source) {
84 PrintF("--- Source from AST ---\n%s\n",
85 PrettyPrinter().PrintProgram(info->function()));
86 }
87
88 if (print_ast) {
89 PrintF("--- AST ---\n%s\n",
90 AstPrinter().PrintProgram(info->function()));
91 }
92 #endif // DEBUG
93 }
94
95
MakeCodeEpilogue(MacroAssembler * masm,Code::Flags flags,CompilationInfo * info)96 Handle<Code> CodeGenerator::MakeCodeEpilogue(MacroAssembler* masm,
97 Code::Flags flags,
98 CompilationInfo* info) {
99 Isolate* isolate = info->isolate();
100
101 // Allocate and install the code.
102 CodeDesc desc;
103 masm->GetCode(&desc);
104 Handle<Code> code =
105 isolate->factory()->NewCode(desc, flags, masm->CodeObject());
106
107 if (!code.is_null()) {
108 isolate->counters()->total_compiled_code_size()->Increment(
109 code->instruction_size());
110 }
111 return code;
112 }
113
114
PrintCode(Handle<Code> code,CompilationInfo * info)115 void CodeGenerator::PrintCode(Handle<Code> code, CompilationInfo* info) {
116 #ifdef ENABLE_DISASSEMBLER
117 bool print_code = Isolate::Current()->bootstrapper()->IsActive()
118 ? FLAG_print_builtin_code
119 : (FLAG_print_code || (info->IsOptimizing() && FLAG_print_opt_code));
120 if (print_code) {
121 // Print the source code if available.
122 FunctionLiteral* function = info->function();
123 Handle<Script> script = info->script();
124 if (!script->IsUndefined() && !script->source()->IsUndefined()) {
125 PrintF("--- Raw source ---\n");
126 StringInputBuffer stream(String::cast(script->source()));
127 stream.Seek(function->start_position());
128 // fun->end_position() points to the last character in the stream. We
129 // need to compensate by adding one to calculate the length.
130 int source_len =
131 function->end_position() - function->start_position() + 1;
132 for (int i = 0; i < source_len; i++) {
133 if (stream.has_more()) PrintF("%c", stream.GetNext());
134 }
135 PrintF("\n\n");
136 }
137 if (info->IsOptimizing()) {
138 if (FLAG_print_unopt_code) {
139 PrintF("--- Unoptimized code ---\n");
140 info->closure()->shared()->code()->Disassemble(
141 *function->debug_name()->ToCString());
142 }
143 PrintF("--- Optimized code ---\n");
144 } else {
145 PrintF("--- Code ---\n");
146 }
147 code->Disassemble(*function->debug_name()->ToCString());
148 }
149 #endif // ENABLE_DISASSEMBLER
150 }
151
152
ShouldGenerateLog(Expression * type)153 bool CodeGenerator::ShouldGenerateLog(Expression* type) {
154 ASSERT(type != NULL);
155 Isolate* isolate = Isolate::Current();
156 if (!isolate->logger()->is_logging() && !CpuProfiler::is_profiling(isolate)) {
157 return false;
158 }
159 Handle<String> name = Handle<String>::cast(type->AsLiteral()->handle());
160 if (FLAG_log_regexp) {
161 if (name->IsEqualTo(CStrVector("regexp")))
162 return true;
163 }
164 return false;
165 }
166
167
RecordPositions(MacroAssembler * masm,int pos,bool right_here)168 bool CodeGenerator::RecordPositions(MacroAssembler* masm,
169 int pos,
170 bool right_here) {
171 if (pos != RelocInfo::kNoPosition) {
172 masm->positions_recorder()->RecordStatementPosition(pos);
173 masm->positions_recorder()->RecordPosition(pos);
174 if (right_here) {
175 return masm->positions_recorder()->WriteRecordedPositions();
176 }
177 }
178 return false;
179 }
180
181
Generate(MacroAssembler * masm)182 void ArgumentsAccessStub::Generate(MacroAssembler* masm) {
183 switch (type_) {
184 case READ_ELEMENT:
185 GenerateReadElement(masm);
186 break;
187 case NEW_NON_STRICT_FAST:
188 GenerateNewNonStrictFast(masm);
189 break;
190 case NEW_NON_STRICT_SLOW:
191 GenerateNewNonStrictSlow(masm);
192 break;
193 case NEW_STRICT:
194 GenerateNewStrict(masm);
195 break;
196 }
197 }
198
199
MinorKey()200 int CEntryStub::MinorKey() {
201 int result = (save_doubles_ == kSaveFPRegs) ? 1 : 0;
202 ASSERT(result_size_ == 1 || result_size_ == 2);
203 #ifdef _WIN64
204 return result | ((result_size_ == 1) ? 0 : 2);
205 #else
206 return result;
207 #endif
208 }
209
210
211 } } // namespace v8::internal
212