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_FRAMES_H_ |
| 29 | #define V8_FRAMES_H_ |
| 30 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 31 | #include "handles.h" |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 32 | #include "safepoint-table.h" |
| 33 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 34 | namespace v8 { |
| 35 | namespace internal { |
| 36 | |
| 37 | typedef uint32_t RegList; |
| 38 | |
| 39 | // Get the number of registers in a given register list. |
| 40 | int NumRegs(RegList list); |
| 41 | |
| 42 | // Return the code of the n-th saved register available to JavaScript. |
| 43 | int JSCallerSavedCode(int n); |
| 44 | |
| 45 | |
| 46 | // Forward declarations. |
| 47 | class StackFrameIterator; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 48 | class ThreadLocalTop; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 49 | class Isolate; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 50 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 51 | class PcToCodeCache { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 52 | public: |
| 53 | struct PcToCodeCacheEntry { |
| 54 | Address pc; |
| 55 | Code* code; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 56 | SafepointEntry safepoint_entry; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 57 | }; |
| 58 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 59 | explicit PcToCodeCache(Isolate* isolate) : isolate_(isolate) { |
| 60 | Flush(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 61 | } |
| 62 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 63 | Code* GcSafeFindCodeForPc(Address pc); |
| 64 | Code* GcSafeCastToCode(HeapObject* object, Address pc); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 65 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 66 | void Flush() { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 67 | memset(&cache_[0], 0, sizeof(cache_)); |
| 68 | } |
| 69 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 70 | PcToCodeCacheEntry* GetCacheEntry(Address pc); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 71 | |
| 72 | private: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 73 | PcToCodeCacheEntry* cache(int index) { return &cache_[index]; } |
| 74 | |
| 75 | Isolate* isolate_; |
| 76 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 77 | static const int kPcToCodeCacheSize = 1024; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 78 | PcToCodeCacheEntry cache_[kPcToCodeCacheSize]; |
| 79 | |
| 80 | DISALLOW_COPY_AND_ASSIGN(PcToCodeCache); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 81 | }; |
| 82 | |
| 83 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 84 | class StackHandler BASE_EMBEDDED { |
| 85 | public: |
| 86 | enum State { |
| 87 | ENTRY, |
| 88 | TRY_CATCH, |
| 89 | TRY_FINALLY |
| 90 | }; |
| 91 | |
| 92 | // Get the address of this stack handler. |
| 93 | inline Address address() const; |
| 94 | |
| 95 | // Get the next stack handler in the chain. |
| 96 | inline StackHandler* next() const; |
| 97 | |
| 98 | // Tells whether the given address is inside this handler. |
| 99 | inline bool includes(Address address) const; |
| 100 | |
| 101 | // Garbage collection support. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 102 | inline void Iterate(ObjectVisitor* v, Code* holder) const; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 103 | |
| 104 | // Conversion support. |
| 105 | static inline StackHandler* FromAddress(Address address); |
| 106 | |
| 107 | // Testers |
| 108 | bool is_entry() { return state() == ENTRY; } |
| 109 | bool is_try_catch() { return state() == TRY_CATCH; } |
| 110 | bool is_try_finally() { return state() == TRY_FINALLY; } |
| 111 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 112 | private: |
| 113 | // Accessors. |
| 114 | inline State state() const; |
| 115 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 116 | inline Address* pc_address() const; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 117 | |
| 118 | DISALLOW_IMPLICIT_CONSTRUCTORS(StackHandler); |
| 119 | }; |
| 120 | |
| 121 | |
| 122 | #define STACK_FRAME_TYPE_LIST(V) \ |
| 123 | V(ENTRY, EntryFrame) \ |
| 124 | V(ENTRY_CONSTRUCT, EntryConstructFrame) \ |
| 125 | V(EXIT, ExitFrame) \ |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 126 | V(JAVA_SCRIPT, JavaScriptFrame) \ |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 127 | V(OPTIMIZED, OptimizedFrame) \ |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 128 | V(INTERNAL, InternalFrame) \ |
| 129 | V(CONSTRUCT, ConstructFrame) \ |
| 130 | V(ARGUMENTS_ADAPTOR, ArgumentsAdaptorFrame) |
| 131 | |
| 132 | |
| 133 | // Abstract base class for all stack frames. |
| 134 | class StackFrame BASE_EMBEDDED { |
| 135 | public: |
| 136 | #define DECLARE_TYPE(type, ignore) type, |
| 137 | enum Type { |
| 138 | NONE = 0, |
| 139 | STACK_FRAME_TYPE_LIST(DECLARE_TYPE) |
| 140 | NUMBER_OF_TYPES |
| 141 | }; |
| 142 | #undef DECLARE_TYPE |
| 143 | |
| 144 | // Opaque data type for identifying stack frames. Used extensively |
| 145 | // by the debugger. |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 146 | // ID_MIN_VALUE and ID_MAX_VALUE are specified to ensure that enumeration type |
| 147 | // has correct value range (see Issue 830 for more details). |
| 148 | enum Id { |
| 149 | ID_MIN_VALUE = kMinInt, |
| 150 | ID_MAX_VALUE = kMaxInt, |
| 151 | NO_ID = 0 |
| 152 | }; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 153 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 154 | struct State { |
| 155 | State() : sp(NULL), fp(NULL), pc_address(NULL) { } |
| 156 | Address sp; |
| 157 | Address fp; |
| 158 | Address* pc_address; |
| 159 | }; |
| 160 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 161 | // Copy constructor; it breaks the connection to host iterator. |
| 162 | StackFrame(const StackFrame& original) { |
| 163 | this->state_ = original.state_; |
| 164 | this->iterator_ = NULL; |
| 165 | } |
| 166 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 167 | // Type testers. |
| 168 | bool is_entry() const { return type() == ENTRY; } |
| 169 | bool is_entry_construct() const { return type() == ENTRY_CONSTRUCT; } |
| 170 | bool is_exit() const { return type() == EXIT; } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 171 | bool is_optimized() const { return type() == OPTIMIZED; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 172 | bool is_arguments_adaptor() const { return type() == ARGUMENTS_ADAPTOR; } |
| 173 | bool is_internal() const { return type() == INTERNAL; } |
| 174 | bool is_construct() const { return type() == CONSTRUCT; } |
| 175 | virtual bool is_standard() const { return false; } |
| 176 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 177 | bool is_java_script() const { |
| 178 | Type type = this->type(); |
| 179 | return (type == JAVA_SCRIPT) || (type == OPTIMIZED); |
| 180 | } |
| 181 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 182 | // Accessors. |
| 183 | Address sp() const { return state_.sp; } |
| 184 | Address fp() const { return state_.fp; } |
| 185 | Address caller_sp() const { return GetCallerStackPointer(); } |
| 186 | |
| 187 | Address pc() const { return *pc_address(); } |
| 188 | void set_pc(Address pc) { *pc_address() = pc; } |
| 189 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 190 | virtual void SetCallerFp(Address caller_fp) = 0; |
| 191 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 192 | Address* pc_address() const { return state_.pc_address; } |
| 193 | |
| 194 | // Get the id of this stack frame. |
| 195 | Id id() const { return static_cast<Id>(OffsetFrom(caller_sp())); } |
| 196 | |
| 197 | // Checks if this frame includes any stack handlers. |
| 198 | bool HasHandler() const; |
| 199 | |
| 200 | // Get the type of this frame. |
| 201 | virtual Type type() const = 0; |
| 202 | |
| 203 | // Get the code associated with this frame. |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 204 | // This method could be called during marking phase of GC. |
| 205 | virtual Code* unchecked_code() const = 0; |
| 206 | |
| 207 | // Get the code associated with this frame. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 208 | Code* LookupCode(Isolate* isolate) const { |
| 209 | return GetContainingCode(isolate, pc()); |
| 210 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 211 | |
| 212 | // Get the code object that contains the given pc. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 213 | static inline Code* GetContainingCode(Isolate* isolate, Address pc); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 214 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 215 | // Get the code object containing the given pc and fill in the |
| 216 | // safepoint entry and the number of stack slots. The pc must be at |
| 217 | // a safepoint. |
| 218 | static Code* GetSafepointData(Address pc, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 219 | SafepointEntry* safepoint_entry, |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 220 | unsigned* stack_slots); |
| 221 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 222 | virtual void Iterate(ObjectVisitor* v) const = 0; |
| 223 | static void IteratePc(ObjectVisitor* v, Address* pc_address, Code* holder); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 224 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 225 | |
| 226 | // Printing support. |
| 227 | enum PrintMode { OVERVIEW, DETAILS }; |
| 228 | virtual void Print(StringStream* accumulator, |
| 229 | PrintMode mode, |
| 230 | int index) const { } |
| 231 | |
| 232 | protected: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 233 | explicit StackFrame(StackFrameIterator* iterator) : iterator_(iterator) { } |
| 234 | virtual ~StackFrame() { } |
| 235 | |
| 236 | // Compute the stack pointer for the calling frame. |
| 237 | virtual Address GetCallerStackPointer() const = 0; |
| 238 | |
| 239 | // Printing support. |
| 240 | static void PrintIndex(StringStream* accumulator, |
| 241 | PrintMode mode, |
| 242 | int index); |
| 243 | |
| 244 | // Get the top handler from the current stack iterator. |
| 245 | inline StackHandler* top_handler() const; |
| 246 | |
| 247 | // Compute the stack frame type for the given state. |
| 248 | static Type ComputeType(State* state); |
| 249 | |
| 250 | private: |
| 251 | const StackFrameIterator* iterator_; |
| 252 | State state_; |
| 253 | |
| 254 | // Fill in the state of the calling frame. |
| 255 | virtual void ComputeCallerState(State* state) const = 0; |
| 256 | |
| 257 | // Get the type and the state of the calling frame. |
| 258 | virtual Type GetCallerState(State* state) const; |
| 259 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 260 | friend class StackFrameIterator; |
| 261 | friend class StackHandlerIterator; |
| 262 | friend class SafeStackFrameIterator; |
| 263 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 264 | private: |
| 265 | void operator=(const StackFrame& original); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 266 | }; |
| 267 | |
| 268 | |
| 269 | // Entry frames are used to enter JavaScript execution from C. |
| 270 | class EntryFrame: public StackFrame { |
| 271 | public: |
| 272 | virtual Type type() const { return ENTRY; } |
| 273 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 274 | virtual Code* unchecked_code() const; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 275 | |
| 276 | // Garbage collection support. |
| 277 | virtual void Iterate(ObjectVisitor* v) const; |
| 278 | |
| 279 | static EntryFrame* cast(StackFrame* frame) { |
| 280 | ASSERT(frame->is_entry()); |
| 281 | return static_cast<EntryFrame*>(frame); |
| 282 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 283 | virtual void SetCallerFp(Address caller_fp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 284 | |
| 285 | protected: |
| 286 | explicit EntryFrame(StackFrameIterator* iterator) : StackFrame(iterator) { } |
| 287 | |
| 288 | // The caller stack pointer for entry frames is always zero. The |
| 289 | // real information about the caller frame is available through the |
| 290 | // link to the top exit frame. |
| 291 | virtual Address GetCallerStackPointer() const { return 0; } |
| 292 | |
| 293 | private: |
| 294 | virtual void ComputeCallerState(State* state) const; |
| 295 | virtual Type GetCallerState(State* state) const; |
| 296 | |
| 297 | friend class StackFrameIterator; |
| 298 | }; |
| 299 | |
| 300 | |
| 301 | class EntryConstructFrame: public EntryFrame { |
| 302 | public: |
| 303 | virtual Type type() const { return ENTRY_CONSTRUCT; } |
| 304 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 305 | virtual Code* unchecked_code() const; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 306 | |
| 307 | static EntryConstructFrame* cast(StackFrame* frame) { |
| 308 | ASSERT(frame->is_entry_construct()); |
| 309 | return static_cast<EntryConstructFrame*>(frame); |
| 310 | } |
| 311 | |
| 312 | protected: |
| 313 | explicit EntryConstructFrame(StackFrameIterator* iterator) |
| 314 | : EntryFrame(iterator) { } |
| 315 | |
| 316 | private: |
| 317 | friend class StackFrameIterator; |
| 318 | }; |
| 319 | |
| 320 | |
| 321 | // Exit frames are used to exit JavaScript execution and go to C. |
| 322 | class ExitFrame: public StackFrame { |
| 323 | public: |
| 324 | virtual Type type() const { return EXIT; } |
| 325 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 326 | virtual Code* unchecked_code() const; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 327 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 328 | Object*& code_slot() const; |
| 329 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 330 | // Garbage collection support. |
| 331 | virtual void Iterate(ObjectVisitor* v) const; |
| 332 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 333 | virtual void SetCallerFp(Address caller_fp); |
| 334 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 335 | static ExitFrame* cast(StackFrame* frame) { |
| 336 | ASSERT(frame->is_exit()); |
| 337 | return static_cast<ExitFrame*>(frame); |
| 338 | } |
| 339 | |
| 340 | // Compute the state and type of an exit frame given a frame |
| 341 | // pointer. Used when constructing the first stack frame seen by an |
| 342 | // iterator and the frames following entry frames. |
| 343 | static Type GetStateForFramePointer(Address fp, State* state); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 344 | static Address ComputeStackPointer(Address fp); |
| 345 | static void FillState(Address fp, Address sp, State* state); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 346 | |
| 347 | protected: |
| 348 | explicit ExitFrame(StackFrameIterator* iterator) : StackFrame(iterator) { } |
| 349 | |
| 350 | virtual Address GetCallerStackPointer() const; |
| 351 | |
| 352 | private: |
| 353 | virtual void ComputeCallerState(State* state) const; |
| 354 | |
| 355 | friend class StackFrameIterator; |
| 356 | }; |
| 357 | |
| 358 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 359 | class StandardFrame: public StackFrame { |
| 360 | public: |
| 361 | // Testers. |
| 362 | virtual bool is_standard() const { return true; } |
| 363 | |
| 364 | // Accessors. |
| 365 | inline Object* context() const; |
| 366 | |
| 367 | // Access the expressions in the stack frame including locals. |
| 368 | inline Object* GetExpression(int index) const; |
| 369 | inline void SetExpression(int index, Object* value); |
| 370 | int ComputeExpressionsCount() const; |
| 371 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 372 | virtual void SetCallerFp(Address caller_fp); |
| 373 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 374 | static StandardFrame* cast(StackFrame* frame) { |
| 375 | ASSERT(frame->is_standard()); |
| 376 | return static_cast<StandardFrame*>(frame); |
| 377 | } |
| 378 | |
| 379 | protected: |
| 380 | explicit StandardFrame(StackFrameIterator* iterator) |
| 381 | : StackFrame(iterator) { } |
| 382 | |
| 383 | virtual void ComputeCallerState(State* state) const; |
| 384 | |
| 385 | // Accessors. |
| 386 | inline Address caller_fp() const; |
| 387 | inline Address caller_pc() const; |
| 388 | |
| 389 | // Computes the address of the PC field in the standard frame given |
| 390 | // by the provided frame pointer. |
| 391 | static inline Address ComputePCAddress(Address fp); |
| 392 | |
| 393 | // Iterate over expression stack including stack handlers, locals, |
| 394 | // and parts of the fixed part including context and code fields. |
| 395 | void IterateExpressions(ObjectVisitor* v) const; |
| 396 | |
| 397 | // Returns the address of the n'th expression stack element. |
| 398 | Address GetExpressionAddress(int n) const; |
| 399 | |
| 400 | // Determines if the n'th expression stack element is in a stack |
| 401 | // handler or not. Requires traversing all handlers in this frame. |
| 402 | bool IsExpressionInsideHandler(int n) const; |
| 403 | |
| 404 | // Determines if the standard frame for the given frame pointer is |
| 405 | // an arguments adaptor frame. |
| 406 | static inline bool IsArgumentsAdaptorFrame(Address fp); |
| 407 | |
| 408 | // Determines if the standard frame for the given frame pointer is a |
| 409 | // construct frame. |
| 410 | static inline bool IsConstructFrame(Address fp); |
| 411 | |
| 412 | private: |
| 413 | friend class StackFrame; |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 414 | friend class StackFrameIterator; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 415 | }; |
| 416 | |
| 417 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 418 | class FrameSummary BASE_EMBEDDED { |
| 419 | public: |
| 420 | FrameSummary(Object* receiver, |
| 421 | JSFunction* function, |
| 422 | Code* code, |
| 423 | int offset, |
| 424 | bool is_constructor) |
| 425 | : receiver_(receiver), |
| 426 | function_(function), |
| 427 | code_(code), |
| 428 | offset_(offset), |
| 429 | is_constructor_(is_constructor) { } |
| 430 | Handle<Object> receiver() { return receiver_; } |
| 431 | Handle<JSFunction> function() { return function_; } |
| 432 | Handle<Code> code() { return code_; } |
| 433 | Address pc() { return reinterpret_cast<Address>(*code_) + offset_; } |
| 434 | int offset() { return offset_; } |
| 435 | bool is_constructor() { return is_constructor_; } |
| 436 | |
| 437 | void Print(); |
| 438 | |
| 439 | private: |
| 440 | Handle<Object> receiver_; |
| 441 | Handle<JSFunction> function_; |
| 442 | Handle<Code> code_; |
| 443 | int offset_; |
| 444 | bool is_constructor_; |
| 445 | }; |
| 446 | |
| 447 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 448 | class JavaScriptFrame: public StandardFrame { |
| 449 | public: |
| 450 | virtual Type type() const { return JAVA_SCRIPT; } |
| 451 | |
| 452 | // Accessors. |
| 453 | inline Object* function() const; |
| 454 | inline Object* receiver() const; |
| 455 | inline void set_receiver(Object* value); |
| 456 | |
| 457 | // Access the parameters. |
| 458 | Object* GetParameter(int index) const; |
| 459 | int ComputeParametersCount() const; |
| 460 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 461 | // Check if this frame is a constructor frame invoked through 'new'. |
| 462 | bool IsConstructor() const; |
| 463 | |
| 464 | // Check if this frame has "adapted" arguments in the sense that the |
| 465 | // actual passed arguments are available in an arguments adaptor |
| 466 | // frame below it on the stack. |
| 467 | inline bool has_adapted_arguments() const; |
| 468 | |
| 469 | // Garbage collection support. |
| 470 | virtual void Iterate(ObjectVisitor* v) const; |
| 471 | |
| 472 | // Printing support. |
| 473 | virtual void Print(StringStream* accumulator, |
| 474 | PrintMode mode, |
| 475 | int index) const; |
| 476 | |
| 477 | // Determine the code for the frame. |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 478 | virtual Code* unchecked_code() const; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 479 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 480 | // Return a list with JSFunctions of this frame. |
| 481 | virtual void GetFunctions(List<JSFunction*>* functions); |
| 482 | |
| 483 | // Build a list with summaries for this frame including all inlined frames. |
| 484 | virtual void Summarize(List<FrameSummary>* frames); |
| 485 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 486 | static JavaScriptFrame* cast(StackFrame* frame) { |
| 487 | ASSERT(frame->is_java_script()); |
| 488 | return static_cast<JavaScriptFrame*>(frame); |
| 489 | } |
| 490 | |
| 491 | protected: |
| 492 | explicit JavaScriptFrame(StackFrameIterator* iterator) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 493 | : StandardFrame(iterator) { } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 494 | |
| 495 | virtual Address GetCallerStackPointer() const; |
| 496 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 497 | // Garbage collection support. Iterates over incoming arguments, |
| 498 | // receiver, and any callee-saved registers. |
| 499 | void IterateArguments(ObjectVisitor* v) const; |
| 500 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 501 | private: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 502 | inline Object* function_slot_object() const; |
| 503 | |
| 504 | friend class StackFrameIterator; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 505 | friend class StackTracer; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 506 | }; |
| 507 | |
| 508 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 509 | class OptimizedFrame : public JavaScriptFrame { |
| 510 | public: |
| 511 | virtual Type type() const { return OPTIMIZED; } |
| 512 | |
| 513 | // GC support. |
| 514 | virtual void Iterate(ObjectVisitor* v) const; |
| 515 | |
| 516 | // Return a list with JSFunctions of this frame. |
| 517 | // The functions are ordered bottom-to-top (i.e. functions.last() |
| 518 | // is the top-most activation) |
| 519 | virtual void GetFunctions(List<JSFunction*>* functions); |
| 520 | |
| 521 | virtual void Summarize(List<FrameSummary>* frames); |
| 522 | |
| 523 | DeoptimizationInputData* GetDeoptimizationData(int* deopt_index); |
| 524 | |
| 525 | protected: |
| 526 | explicit OptimizedFrame(StackFrameIterator* iterator) |
| 527 | : JavaScriptFrame(iterator) { } |
| 528 | |
| 529 | private: |
| 530 | friend class StackFrameIterator; |
| 531 | }; |
| 532 | |
| 533 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 534 | // Arguments adaptor frames are automatically inserted below |
| 535 | // JavaScript frames when the actual number of parameters does not |
| 536 | // match the formal number of parameters. |
| 537 | class ArgumentsAdaptorFrame: public JavaScriptFrame { |
| 538 | public: |
| 539 | virtual Type type() const { return ARGUMENTS_ADAPTOR; } |
| 540 | |
| 541 | // Determine the code for the frame. |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 542 | virtual Code* unchecked_code() const; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 543 | |
| 544 | static ArgumentsAdaptorFrame* cast(StackFrame* frame) { |
| 545 | ASSERT(frame->is_arguments_adaptor()); |
| 546 | return static_cast<ArgumentsAdaptorFrame*>(frame); |
| 547 | } |
| 548 | |
| 549 | // Printing support. |
| 550 | virtual void Print(StringStream* accumulator, |
| 551 | PrintMode mode, |
| 552 | int index) const; |
| 553 | protected: |
| 554 | explicit ArgumentsAdaptorFrame(StackFrameIterator* iterator) |
| 555 | : JavaScriptFrame(iterator) { } |
| 556 | |
| 557 | virtual Address GetCallerStackPointer() const; |
| 558 | |
| 559 | private: |
| 560 | friend class StackFrameIterator; |
| 561 | }; |
| 562 | |
| 563 | |
| 564 | class InternalFrame: public StandardFrame { |
| 565 | public: |
| 566 | virtual Type type() const { return INTERNAL; } |
| 567 | |
| 568 | // Garbage collection support. |
| 569 | virtual void Iterate(ObjectVisitor* v) const; |
| 570 | |
| 571 | // Determine the code for the frame. |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 572 | virtual Code* unchecked_code() const; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 573 | |
| 574 | static InternalFrame* cast(StackFrame* frame) { |
| 575 | ASSERT(frame->is_internal()); |
| 576 | return static_cast<InternalFrame*>(frame); |
| 577 | } |
| 578 | |
| 579 | protected: |
| 580 | explicit InternalFrame(StackFrameIterator* iterator) |
| 581 | : StandardFrame(iterator) { } |
| 582 | |
| 583 | virtual Address GetCallerStackPointer() const; |
| 584 | |
| 585 | private: |
| 586 | friend class StackFrameIterator; |
| 587 | }; |
| 588 | |
| 589 | |
| 590 | // Construct frames are special trampoline frames introduced to handle |
| 591 | // function invocations through 'new'. |
| 592 | class ConstructFrame: public InternalFrame { |
| 593 | public: |
| 594 | virtual Type type() const { return CONSTRUCT; } |
| 595 | |
| 596 | static ConstructFrame* cast(StackFrame* frame) { |
| 597 | ASSERT(frame->is_construct()); |
| 598 | return static_cast<ConstructFrame*>(frame); |
| 599 | } |
| 600 | |
| 601 | protected: |
| 602 | explicit ConstructFrame(StackFrameIterator* iterator) |
| 603 | : InternalFrame(iterator) { } |
| 604 | |
| 605 | private: |
| 606 | friend class StackFrameIterator; |
| 607 | }; |
| 608 | |
| 609 | |
| 610 | class StackFrameIterator BASE_EMBEDDED { |
| 611 | public: |
| 612 | // An iterator that iterates over the current thread's stack. |
| 613 | StackFrameIterator(); |
| 614 | |
| 615 | // An iterator that iterates over a given thread's stack. |
| 616 | explicit StackFrameIterator(ThreadLocalTop* thread); |
| 617 | |
| 618 | // An iterator that can start from a given FP address. |
| 619 | // If use_top, then work as usual, if fp isn't NULL, use it, |
| 620 | // otherwise, do nothing. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 621 | StackFrameIterator(Isolate* isolate, bool use_top, Address fp, Address sp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 622 | |
| 623 | StackFrame* frame() const { |
| 624 | ASSERT(!done()); |
| 625 | return frame_; |
| 626 | } |
| 627 | |
| 628 | bool done() const { return frame_ == NULL; } |
| 629 | void Advance() { (this->*advance_)(); } |
| 630 | |
| 631 | // Go back to the first frame. |
| 632 | void Reset(); |
| 633 | |
| 634 | private: |
| 635 | #define DECLARE_SINGLETON(ignore, type) type type##_; |
| 636 | STACK_FRAME_TYPE_LIST(DECLARE_SINGLETON) |
| 637 | #undef DECLARE_SINGLETON |
| 638 | StackFrame* frame_; |
| 639 | StackHandler* handler_; |
| 640 | ThreadLocalTop* thread_; |
| 641 | Address fp_; |
| 642 | Address sp_; |
| 643 | void (StackFrameIterator::*advance_)(); |
| 644 | |
| 645 | StackHandler* handler() const { |
| 646 | ASSERT(!done()); |
| 647 | return handler_; |
| 648 | } |
| 649 | |
| 650 | // Get the type-specific frame singleton in a given state. |
| 651 | StackFrame* SingletonFor(StackFrame::Type type, StackFrame::State* state); |
| 652 | // A helper function, can return a NULL pointer. |
| 653 | StackFrame* SingletonFor(StackFrame::Type type); |
| 654 | |
| 655 | void AdvanceWithHandler(); |
| 656 | void AdvanceWithoutHandler(); |
| 657 | |
| 658 | friend class StackFrame; |
| 659 | friend class SafeStackFrameIterator; |
| 660 | DISALLOW_COPY_AND_ASSIGN(StackFrameIterator); |
| 661 | }; |
| 662 | |
| 663 | |
| 664 | // Iterator that supports iterating through all JavaScript frames. |
| 665 | template<typename Iterator> |
| 666 | class JavaScriptFrameIteratorTemp BASE_EMBEDDED { |
| 667 | public: |
| 668 | JavaScriptFrameIteratorTemp() { if (!done()) Advance(); } |
| 669 | |
| 670 | explicit JavaScriptFrameIteratorTemp(ThreadLocalTop* thread) : |
| 671 | iterator_(thread) { |
| 672 | if (!done()) Advance(); |
| 673 | } |
| 674 | |
| 675 | // Skip frames until the frame with the given id is reached. |
| 676 | explicit JavaScriptFrameIteratorTemp(StackFrame::Id id); |
| 677 | |
| 678 | JavaScriptFrameIteratorTemp(Address fp, Address sp, |
| 679 | Address low_bound, Address high_bound) : |
| 680 | iterator_(fp, sp, low_bound, high_bound) { |
| 681 | if (!done()) Advance(); |
| 682 | } |
| 683 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 684 | JavaScriptFrameIteratorTemp(Isolate* isolate, |
| 685 | Address fp, Address sp, |
| 686 | Address low_bound, Address high_bound) : |
| 687 | iterator_(isolate, fp, sp, low_bound, high_bound) { |
| 688 | if (!done()) Advance(); |
| 689 | } |
| 690 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 691 | inline JavaScriptFrame* frame() const; |
| 692 | |
| 693 | bool done() const { return iterator_.done(); } |
| 694 | void Advance(); |
| 695 | |
| 696 | // Advance to the frame holding the arguments for the current |
| 697 | // frame. This only affects the current frame if it has adapted |
| 698 | // arguments. |
| 699 | void AdvanceToArgumentsFrame(); |
| 700 | |
| 701 | // Go back to the first frame. |
| 702 | void Reset(); |
| 703 | |
| 704 | private: |
| 705 | Iterator iterator_; |
| 706 | }; |
| 707 | |
| 708 | |
| 709 | typedef JavaScriptFrameIteratorTemp<StackFrameIterator> JavaScriptFrameIterator; |
| 710 | |
| 711 | |
| 712 | // NOTE: The stack trace frame iterator is an iterator that only |
| 713 | // traverse proper JavaScript frames; that is JavaScript frames that |
| 714 | // have proper JavaScript functions. This excludes the problematic |
| 715 | // functions in runtime.js. |
| 716 | class StackTraceFrameIterator: public JavaScriptFrameIterator { |
| 717 | public: |
| 718 | StackTraceFrameIterator(); |
| 719 | void Advance(); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 720 | |
| 721 | private: |
| 722 | bool IsValidFrame(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 723 | }; |
| 724 | |
| 725 | |
| 726 | class SafeStackFrameIterator BASE_EMBEDDED { |
| 727 | public: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 728 | SafeStackFrameIterator(Isolate* isolate, |
| 729 | Address fp, Address sp, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 730 | Address low_bound, Address high_bound); |
| 731 | |
| 732 | StackFrame* frame() const { |
| 733 | ASSERT(is_working_iterator_); |
| 734 | return iterator_.frame(); |
| 735 | } |
| 736 | |
| 737 | bool done() const { return iteration_done_ ? true : iterator_.done(); } |
| 738 | |
| 739 | void Advance(); |
| 740 | void Reset(); |
| 741 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 742 | static bool is_active() { return active_count_ > 0; } |
| 743 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 744 | static bool IsWithinBounds( |
| 745 | Address low_bound, Address high_bound, Address addr) { |
| 746 | return low_bound <= addr && addr <= high_bound; |
| 747 | } |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 748 | |
| 749 | private: |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 750 | class StackAddressValidator { |
| 751 | public: |
| 752 | StackAddressValidator(Address low_bound, Address high_bound) |
| 753 | : low_bound_(low_bound), high_bound_(high_bound) { } |
| 754 | bool IsValid(Address addr) const { |
| 755 | return IsWithinBounds(low_bound_, high_bound_, addr); |
| 756 | } |
| 757 | private: |
| 758 | Address low_bound_; |
| 759 | Address high_bound_; |
| 760 | }; |
| 761 | |
| 762 | class ExitFrameValidator { |
| 763 | public: |
| 764 | explicit ExitFrameValidator(const StackAddressValidator& validator) |
| 765 | : validator_(validator) { } |
| 766 | ExitFrameValidator(Address low_bound, Address high_bound) |
| 767 | : validator_(low_bound, high_bound) { } |
| 768 | bool IsValidFP(Address fp); |
| 769 | private: |
| 770 | StackAddressValidator validator_; |
| 771 | }; |
| 772 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 773 | bool IsValidStackAddress(Address addr) const { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 774 | return stack_validator_.IsValid(addr); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 775 | } |
| 776 | bool CanIterateHandles(StackFrame* frame, StackHandler* handler); |
| 777 | bool IsValidFrame(StackFrame* frame) const; |
| 778 | bool IsValidCaller(StackFrame* frame); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 779 | static bool IsValidTop(Isolate* isolate, |
| 780 | Address low_bound, Address high_bound); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 781 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 782 | // This is a nasty hack to make sure the active count is incremented |
| 783 | // before the constructor for the embedded iterator is invoked. This |
| 784 | // is needed because the constructor will start looking at frames |
| 785 | // right away and we need to make sure it doesn't start inspecting |
| 786 | // heap objects. |
| 787 | class ActiveCountMaintainer BASE_EMBEDDED { |
| 788 | public: |
| 789 | ActiveCountMaintainer() { active_count_++; } |
| 790 | ~ActiveCountMaintainer() { active_count_--; } |
| 791 | }; |
| 792 | |
| 793 | ActiveCountMaintainer maintainer_; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 794 | // TODO(isolates): this is dangerous. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 795 | static int active_count_; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 796 | StackAddressValidator stack_validator_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 797 | const bool is_valid_top_; |
| 798 | const bool is_valid_fp_; |
| 799 | const bool is_working_iterator_; |
| 800 | bool iteration_done_; |
| 801 | StackFrameIterator iterator_; |
| 802 | }; |
| 803 | |
| 804 | |
| 805 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 806 | typedef JavaScriptFrameIteratorTemp<SafeStackFrameIterator> |
| 807 | SafeJavaScriptFrameIterator; |
| 808 | |
| 809 | |
| 810 | class SafeStackTraceFrameIterator: public SafeJavaScriptFrameIterator { |
| 811 | public: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 812 | explicit SafeStackTraceFrameIterator(Isolate* isolate, |
| 813 | Address fp, Address sp, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 814 | Address low_bound, Address high_bound); |
| 815 | void Advance(); |
| 816 | }; |
| 817 | #endif |
| 818 | |
| 819 | |
| 820 | class StackFrameLocator BASE_EMBEDDED { |
| 821 | public: |
| 822 | // Find the nth JavaScript frame on the stack. The caller must |
| 823 | // guarantee that such a frame exists. |
| 824 | JavaScriptFrame* FindJavaScriptFrame(int n); |
| 825 | |
| 826 | private: |
| 827 | StackFrameIterator iterator_; |
| 828 | }; |
| 829 | |
| 830 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 831 | // Reads all frames on the current stack and copies them into the current |
| 832 | // zone memory. |
| 833 | Vector<StackFrame*> CreateStackMap(); |
| 834 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 835 | } } // namespace v8::internal |
| 836 | |
| 837 | #endif // V8_FRAMES_H_ |