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Side by Side Diff: src/objects.h

Issue 2900713004: [objects] Extract DebugInfo and BreakPointInfo to own file (Closed)
Patch Set: Remove undefs from objects-inl.h Created 3 years, 6 months ago
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1 // Copyright 2015 the V8 project authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef V8_OBJECTS_H_ 5 #ifndef V8_OBJECTS_H_
6 #define V8_OBJECTS_H_ 6 #define V8_OBJECTS_H_
7 7
8 #include <iosfwd> 8 #include <iosfwd>
9 #include <memory> 9 #include <memory>
10 10
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5179 // [start_position_and_type]: Field used to store both the source code 5179 // [start_position_and_type]: Field used to store both the source code
5180 // position, whether or not the function is a function expression, 5180 // position, whether or not the function is a function expression,
5181 // and whether or not the function is a toplevel function. The two 5181 // and whether or not the function is a toplevel function. The two
5182 // least significants bit indicates whether the function is an 5182 // least significants bit indicates whether the function is an
5183 // expression and the rest contains the source code position. 5183 // expression and the rest contains the source code position.
5184 inline int start_position_and_type() const; 5184 inline int start_position_and_type() const;
5185 inline void set_start_position_and_type(int value); 5185 inline void set_start_position_and_type(int value);
5186 5186
5187 // The function is subject to debugging if a debug info is attached. 5187 // The function is subject to debugging if a debug info is attached.
5188 inline bool HasDebugInfo() const; 5188 inline bool HasDebugInfo() const;
5189 inline DebugInfo* GetDebugInfo() const; 5189 DebugInfo* GetDebugInfo() const;
5190 5190
5191 // A function has debug code if the compiled code has debug break slots. 5191 // A function has debug code if the compiled code has debug break slots.
5192 inline bool HasDebugCode() const; 5192 inline bool HasDebugCode() const;
5193 5193
5194 // [debug info]: Debug information. 5194 // [debug info]: Debug information.
5195 DECL_ACCESSORS(debug_info, Object) 5195 DECL_ACCESSORS(debug_info, Object)
5196 5196
5197 // Bit field containing various information collected for debugging. 5197 // Bit field containing various information collected for debugging.
5198 // This field is either stored on the kDebugInfo slot or inside the 5198 // This field is either stored on the kDebugInfo slot or inside the
5199 // debug info struct. 5199 // debug info struct.
5200 inline int debugger_hints() const; 5200 int debugger_hints() const;
5201 inline void set_debugger_hints(int value); 5201 void set_debugger_hints(int value);
5202 5202
5203 // Indicates that the function was created by the Function function. 5203 // Indicates that the function was created by the Function function.
5204 // Though it's anonymous, toString should treat it as if it had the name 5204 // Though it's anonymous, toString should treat it as if it had the name
5205 // "anonymous". We don't set the name itself so that the system does not 5205 // "anonymous". We don't set the name itself so that the system does not
5206 // see a binding for it. 5206 // see a binding for it.
5207 DECL_BOOLEAN_ACCESSORS(name_should_print_as_anonymous) 5207 DECL_BOOLEAN_ACCESSORS(name_should_print_as_anonymous)
5208 5208
5209 // Indicates that the function is either an anonymous expression 5209 // Indicates that the function is either an anonymous expression
5210 // or an arrow function (the name field can be set through the API, 5210 // or an arrow function (the name field can be set through the API,
5211 // which does not change this flag). 5211 // which does not change this flag).
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9208 // Starting from given object template's constructor walk up the inheritance 9208 // Starting from given object template's constructor walk up the inheritance
9209 // chain till a function template that has an instance template is found. 9209 // chain till a function template that has an instance template is found.
9210 inline ObjectTemplateInfo* GetParent(Isolate* isolate); 9210 inline ObjectTemplateInfo* GetParent(Isolate* isolate);
9211 9211
9212 private: 9212 private:
9213 class IsImmutablePrototype : public BitField<bool, 0, 1> {}; 9213 class IsImmutablePrototype : public BitField<bool, 0, 1> {};
9214 class EmbedderFieldCount 9214 class EmbedderFieldCount
9215 : public BitField<int, IsImmutablePrototype::kNext, 29> {}; 9215 : public BitField<int, IsImmutablePrototype::kNext, 29> {};
9216 }; 9216 };
9217 9217
9218
9219 // The DebugInfo class holds additional information for a function being
9220 // debugged.
9221 class DebugInfo: public Struct {
9222 public:
9223 // The shared function info for the source being debugged.
9224 DECL_ACCESSORS(shared, SharedFunctionInfo)
9225
9226 // Bit field containing various information collected for debugging.
9227 DECL_INT_ACCESSORS(debugger_hints)
9228
9229 DECL_ACCESSORS(debug_bytecode_array, Object)
9230 // Fixed array holding status information for each active break point.
9231 DECL_ACCESSORS(break_points, FixedArray)
9232
9233 // Check if there is a break point at a source position.
9234 bool HasBreakPoint(int source_position);
9235 // Attempt to clear a break point. Return true if successful.
9236 static bool ClearBreakPoint(Handle<DebugInfo> debug_info,
9237 Handle<Object> break_point_object);
9238 // Set a break point.
9239 static void SetBreakPoint(Handle<DebugInfo> debug_info, int source_position,
9240 Handle<Object> break_point_object);
9241 // Get the break point objects for a source position.
9242 Handle<Object> GetBreakPointObjects(int source_position);
9243 // Find the break point info holding this break point object.
9244 static Handle<Object> FindBreakPointInfo(Handle<DebugInfo> debug_info,
9245 Handle<Object> break_point_object);
9246 // Get the number of break points for this function.
9247 int GetBreakPointCount();
9248
9249 inline bool HasDebugBytecodeArray();
9250 inline bool HasDebugCode();
9251
9252 inline BytecodeArray* OriginalBytecodeArray();
9253 inline BytecodeArray* DebugBytecodeArray();
9254 inline Code* DebugCode();
9255
9256 DECLARE_CAST(DebugInfo)
9257
9258 // Dispatched behavior.
9259 DECLARE_PRINTER(DebugInfo)
9260 DECLARE_VERIFIER(DebugInfo)
9261
9262 static const int kSharedFunctionInfoIndex = Struct::kHeaderSize;
9263 static const int kDebuggerHintsIndex =
9264 kSharedFunctionInfoIndex + kPointerSize;
9265 static const int kDebugBytecodeArrayIndex =
9266 kDebuggerHintsIndex + kPointerSize;
9267 static const int kBreakPointsStateIndex =
9268 kDebugBytecodeArrayIndex + kPointerSize;
9269 static const int kSize = kBreakPointsStateIndex + kPointerSize;
9270
9271 static const int kEstimatedNofBreakPointsInFunction = 4;
9272
9273 private:
9274 // Get the break point info object for a source position.
9275 Object* GetBreakPointInfo(int source_position);
9276
9277 DISALLOW_IMPLICIT_CONSTRUCTORS(DebugInfo);
9278 };
9279
9280
9281 // The BreakPointInfo class holds information for break points set in a
9282 // function. The DebugInfo object holds a BreakPointInfo object for each code
9283 // position with one or more break points.
9284 class BreakPointInfo : public Tuple2 {
9285 public:
9286 // The position in the source for the break position.
9287 DECL_INT_ACCESSORS(source_position)
9288 // List of related JavaScript break points.
9289 DECL_ACCESSORS(break_point_objects, Object)
9290
9291 // Removes a break point.
9292 static void ClearBreakPoint(Handle<BreakPointInfo> info,
9293 Handle<Object> break_point_object);
9294 // Set a break point.
9295 static void SetBreakPoint(Handle<BreakPointInfo> info,
9296 Handle<Object> break_point_object);
9297 // Check if break point info has this break point object.
9298 static bool HasBreakPointObject(Handle<BreakPointInfo> info,
9299 Handle<Object> break_point_object);
9300 // Get the number of break points for this code offset.
9301 int GetBreakPointCount();
9302
9303 int GetStatementPosition(Handle<DebugInfo> debug_info);
9304
9305 DECLARE_CAST(BreakPointInfo)
9306
9307 static const int kSourcePositionIndex = kValue1Offset;
9308 static const int kBreakPointObjectsIndex = kValue2Offset;
9309
9310 private:
9311 DISALLOW_IMPLICIT_CONSTRUCTORS(BreakPointInfo);
9312 };
9313
9314 class StackFrameInfo : public Struct { 9218 class StackFrameInfo : public Struct {
9315 public: 9219 public:
9316 DECL_INT_ACCESSORS(line_number) 9220 DECL_INT_ACCESSORS(line_number)
9317 DECL_INT_ACCESSORS(column_number) 9221 DECL_INT_ACCESSORS(column_number)
9318 DECL_INT_ACCESSORS(script_id) 9222 DECL_INT_ACCESSORS(script_id)
9319 DECL_ACCESSORS(script_name, Object) 9223 DECL_ACCESSORS(script_name, Object)
9320 DECL_ACCESSORS(script_name_or_source_url, Object) 9224 DECL_ACCESSORS(script_name_or_source_url, Object)
9321 DECL_ACCESSORS(function_name, Object) 9225 DECL_ACCESSORS(function_name, Object)
9322 DECL_BOOLEAN_ACCESSORS(is_eval) 9226 DECL_BOOLEAN_ACCESSORS(is_eval)
9323 DECL_BOOLEAN_ACCESSORS(is_constructor) 9227 DECL_BOOLEAN_ACCESSORS(is_constructor)
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9443 } 9347 }
9444 }; 9348 };
9445 9349
9446 9350
9447 } // NOLINT, false-positive due to second-order macros. 9351 } // NOLINT, false-positive due to second-order macros.
9448 } // NOLINT, false-positive due to second-order macros. 9352 } // NOLINT, false-positive due to second-order macros.
9449 9353
9450 #include "src/objects/object-macros-undef.h" 9354 #include "src/objects/object-macros-undef.h"
9451 9355
9452 #endif // V8_OBJECTS_H_ 9356 #endif // V8_OBJECTS_H_
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