Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 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 | #ifndef V8_COMPILER_H_ |
| 29 | #define V8_COMPILER_H_ |
| 30 | |
| 31 | #include "frame-element.h" |
| 32 | #include "parser.h" |
| 33 | #include "zone.h" |
| 34 | |
| 35 | namespace v8 { |
| 36 | namespace internal { |
| 37 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 38 | // CompilationInfo encapsulates some information known at compile time. It |
| 39 | // is constructed based on the resources available at compile-time. |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 40 | class CompilationInfo BASE_EMBEDDED { |
| 41 | public: |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 42 | // Lazy compilation of a JSFunction. |
| 43 | CompilationInfo(Handle<JSFunction> closure, |
| 44 | int loop_nesting, |
| 45 | Handle<Object> receiver) |
| 46 | : closure_(closure), |
| 47 | function_(NULL), |
| 48 | is_eval_(false), |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 49 | loop_nesting_(loop_nesting), |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 50 | receiver_(receiver) { |
| 51 | Initialize(); |
| 52 | ASSERT(!closure_.is_null() && |
| 53 | shared_info_.is_null() && |
| 54 | script_.is_null()); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 55 | } |
| 56 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 57 | // Lazy compilation based on SharedFunctionInfo. |
| 58 | explicit CompilationInfo(Handle<SharedFunctionInfo> shared_info) |
| 59 | : shared_info_(shared_info), |
| 60 | function_(NULL), |
| 61 | is_eval_(false), |
| 62 | loop_nesting_(0) { |
| 63 | Initialize(); |
| 64 | ASSERT(closure_.is_null() && |
| 65 | !shared_info_.is_null() && |
| 66 | script_.is_null()); |
| 67 | } |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 68 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 69 | // Eager compilation. |
| 70 | CompilationInfo(FunctionLiteral* literal, Handle<Script> script, bool is_eval) |
| 71 | : script_(script), |
| 72 | function_(literal), |
| 73 | is_eval_(is_eval), |
| 74 | loop_nesting_(0) { |
| 75 | Initialize(); |
| 76 | ASSERT(closure_.is_null() && |
| 77 | shared_info_.is_null() && |
| 78 | !script_.is_null()); |
| 79 | } |
| 80 | |
| 81 | // We can only get a JSFunction if we actually have one. |
| 82 | Handle<JSFunction> closure() { return closure_; } |
| 83 | |
| 84 | // We can get a SharedFunctionInfo from a JSFunction or if we actually |
| 85 | // have one. |
| 86 | Handle<SharedFunctionInfo> shared_info() { |
| 87 | if (!closure().is_null()) { |
| 88 | return Handle<SharedFunctionInfo>(closure()->shared()); |
| 89 | } else { |
| 90 | return shared_info_; |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | // We can always get a script. Either we have one or we can get a shared |
| 95 | // function info. |
| 96 | Handle<Script> script() { |
| 97 | if (!script_.is_null()) { |
| 98 | return script_; |
| 99 | } else { |
| 100 | ASSERT(shared_info()->script()->IsScript()); |
| 101 | return Handle<Script>(Script::cast(shared_info()->script())); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | // There should always be a function literal, but it may be set after |
| 106 | // construction (for lazy compilation). |
| 107 | FunctionLiteral* function() { return function_; } |
| 108 | void set_function(FunctionLiteral* literal) { |
| 109 | ASSERT(function_ == NULL); |
| 110 | function_ = literal; |
| 111 | } |
| 112 | |
| 113 | // Simple accessors. |
| 114 | bool is_eval() { return is_eval_; } |
| 115 | int loop_nesting() { return loop_nesting_; } |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 116 | bool has_receiver() { return !receiver_.is_null(); } |
| 117 | Handle<Object> receiver() { return receiver_; } |
| 118 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 119 | // Accessors for mutable fields, possibly set by analysis passes with |
| 120 | // default values given by Initialize. |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 121 | bool has_this_properties() { return has_this_properties_; } |
| 122 | void set_has_this_properties(bool flag) { has_this_properties_ = flag; } |
| 123 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 124 | bool has_global_object() { |
| 125 | return !closure().is_null() && (closure()->context()->global() != NULL); |
| 126 | } |
| 127 | |
| 128 | GlobalObject* global_object() { |
| 129 | return has_global_object() ? closure()->context()->global() : NULL; |
| 130 | } |
| 131 | |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 132 | bool has_globals() { return has_globals_; } |
| 133 | void set_has_globals(bool flag) { has_globals_ = flag; } |
| 134 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 135 | // Derived accessors. |
| 136 | Scope* scope() { return function()->scope(); } |
| 137 | |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 138 | private: |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 139 | void Initialize() { |
| 140 | has_this_properties_ = false; |
| 141 | has_globals_ = false; |
| 142 | } |
| 143 | |
| 144 | Handle<JSFunction> closure_; |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 145 | Handle<SharedFunctionInfo> shared_info_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 146 | Handle<Script> script_; |
| 147 | |
| 148 | FunctionLiteral* function_; |
| 149 | |
| 150 | bool is_eval_; |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 151 | int loop_nesting_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 152 | |
| 153 | Handle<Object> receiver_; |
| 154 | |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 155 | bool has_this_properties_; |
| 156 | bool has_globals_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 157 | |
| 158 | DISALLOW_COPY_AND_ASSIGN(CompilationInfo); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 159 | }; |
| 160 | |
| 161 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 162 | // The V8 compiler |
| 163 | // |
| 164 | // General strategy: Source code is translated into an anonymous function w/o |
| 165 | // parameters which then can be executed. If the source code contains other |
| 166 | // functions, they will be compiled and allocated as part of the compilation |
| 167 | // of the source code. |
| 168 | |
| 169 | // Please note this interface returns function boilerplates. |
| 170 | // This means you need to call Factory::NewFunctionFromBoilerplate |
| 171 | // before you have a real function with context. |
| 172 | |
| 173 | class Compiler : public AllStatic { |
| 174 | public: |
| 175 | enum ValidationState { VALIDATE_JSON, DONT_VALIDATE_JSON }; |
| 176 | |
| 177 | // All routines return a JSFunction. |
| 178 | // If an error occurs an exception is raised and |
| 179 | // the return handle contains NULL. |
| 180 | |
| 181 | // Compile a String source within a context. |
| 182 | static Handle<JSFunction> Compile(Handle<String> source, |
| 183 | Handle<Object> script_name, |
| 184 | int line_offset, int column_offset, |
| 185 | v8::Extension* extension, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 186 | ScriptDataImpl* script_Data, |
| 187 | NativesFlag is_natives_code); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 188 | |
| 189 | // Compile a String source within a context for Eval. |
| 190 | static Handle<JSFunction> CompileEval(Handle<String> source, |
| 191 | Handle<Context> context, |
| 192 | bool is_global, |
| 193 | ValidationState validation); |
| 194 | |
| 195 | // Compile from function info (used for lazy compilation). Returns |
| 196 | // true on success and false if the compilation resulted in a stack |
| 197 | // overflow. |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 198 | static bool CompileLazy(CompilationInfo* info); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 199 | |
| 200 | // Compile a function boilerplate object (the function is possibly |
| 201 | // lazily compiled). Called recursively from a backend code |
| 202 | // generator 'caller' to build the boilerplate. |
| 203 | static Handle<JSFunction> BuildBoilerplate(FunctionLiteral* node, |
| 204 | Handle<Script> script, |
| 205 | AstVisitor* caller); |
| 206 | |
| 207 | // Set the function info for a newly compiled function. |
| 208 | static void SetFunctionInfo(Handle<JSFunction> fun, |
| 209 | FunctionLiteral* lit, |
| 210 | bool is_toplevel, |
| 211 | Handle<Script> script); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame^] | 212 | |
| 213 | private: |
| 214 | |
| 215 | #if defined ENABLE_LOGGING_AND_PROFILING || defined ENABLE_OPROFILE_AGENT |
| 216 | static void LogCodeCreateEvent(Logger::LogEventsAndTags tag, |
| 217 | Handle<String> name, |
| 218 | Handle<String> inferred_name, |
| 219 | int start_position, |
| 220 | Handle<Script> script, |
| 221 | Handle<Code> code); |
| 222 | #endif |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 223 | }; |
| 224 | |
| 225 | |
| 226 | // During compilation we need a global list of handles to constants |
| 227 | // for frame elements. When the zone gets deleted, we make sure to |
| 228 | // clear this list of handles as well. |
| 229 | class CompilationZoneScope : public ZoneScope { |
| 230 | public: |
| 231 | explicit CompilationZoneScope(ZoneScopeMode mode) : ZoneScope(mode) { } |
| 232 | virtual ~CompilationZoneScope() { |
| 233 | if (ShouldDeleteOnExit()) { |
| 234 | FrameElement::ClearConstantList(); |
| 235 | Result::ClearConstantList(); |
| 236 | } |
| 237 | } |
| 238 | }; |
| 239 | |
| 240 | |
| 241 | } } // namespace v8::internal |
| 242 | |
| 243 | #endif // V8_COMPILER_H_ |