ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 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 "api.h" |
| 31 | #include "arguments.h" |
| 32 | #include "bootstrapper.h" |
| 33 | #include "code-stubs.h" |
| 34 | #include "compiler.h" |
| 35 | #include "debug.h" |
| 36 | #include "execution.h" |
| 37 | #include "global-handles.h" |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 38 | #include "ic.h" |
| 39 | #include "ic-inl.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 40 | #include "natives.h" |
| 41 | #include "stub-cache.h" |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 42 | #include "log.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 43 | |
| 44 | namespace v8 { namespace internal { |
| 45 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 46 | #ifdef ENABLE_DEBUGGER_SUPPORT |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 47 | static void PrintLn(v8::Local<v8::Value> value) { |
| 48 | v8::Local<v8::String> s = value->ToString(); |
| 49 | char* data = NewArray<char>(s->Length() + 1); |
| 50 | if (data == NULL) { |
| 51 | V8::FatalProcessOutOfMemory("PrintLn"); |
| 52 | return; |
| 53 | } |
| 54 | s->WriteAscii(data); |
| 55 | PrintF("%s\n", data); |
| 56 | DeleteArray(data); |
| 57 | } |
| 58 | |
| 59 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 60 | static Handle<Code> ComputeCallDebugBreak(int argc) { |
| 61 | CALL_HEAP_FUNCTION(StubCache::ComputeCallDebugBreak(argc), Code); |
| 62 | } |
| 63 | |
| 64 | |
| 65 | static Handle<Code> ComputeCallDebugPrepareStepIn(int argc) { |
| 66 | CALL_HEAP_FUNCTION(StubCache::ComputeCallDebugPrepareStepIn(argc), Code); |
| 67 | } |
| 68 | |
| 69 | |
| 70 | BreakLocationIterator::BreakLocationIterator(Handle<DebugInfo> debug_info, |
| 71 | BreakLocatorType type) { |
| 72 | debug_info_ = debug_info; |
| 73 | type_ = type; |
| 74 | reloc_iterator_ = NULL; |
| 75 | reloc_iterator_original_ = NULL; |
| 76 | Reset(); // Initialize the rest of the member variables. |
| 77 | } |
| 78 | |
| 79 | |
| 80 | BreakLocationIterator::~BreakLocationIterator() { |
| 81 | ASSERT(reloc_iterator_ != NULL); |
| 82 | ASSERT(reloc_iterator_original_ != NULL); |
| 83 | delete reloc_iterator_; |
| 84 | delete reloc_iterator_original_; |
| 85 | } |
| 86 | |
| 87 | |
| 88 | void BreakLocationIterator::Next() { |
| 89 | AssertNoAllocation nogc; |
| 90 | ASSERT(!RinfoDone()); |
| 91 | |
| 92 | // Iterate through reloc info for code and original code stopping at each |
| 93 | // breakable code target. |
| 94 | bool first = break_point_ == -1; |
| 95 | while (!RinfoDone()) { |
| 96 | if (!first) RinfoNext(); |
| 97 | first = false; |
| 98 | if (RinfoDone()) return; |
| 99 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 100 | // Whenever a statement position or (plain) position is passed update the |
| 101 | // current value of these. |
| 102 | if (RelocInfo::IsPosition(rmode())) { |
| 103 | if (RelocInfo::IsStatementPosition(rmode())) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 104 | statement_position_ = |
| 105 | rinfo()->data() - debug_info_->shared()->start_position(); |
| 106 | } |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 107 | // Always update the position as we don't want that to be before the |
| 108 | // statement position. |
| 109 | position_ = rinfo()->data() - debug_info_->shared()->start_position(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 110 | ASSERT(position_ >= 0); |
| 111 | ASSERT(statement_position_ >= 0); |
| 112 | } |
| 113 | |
| 114 | // Check for breakable code target. Look in the original code as setting |
| 115 | // break points can cause the code targets in the running (debugged) code to |
| 116 | // be of a different kind than in the original code. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 117 | if (RelocInfo::IsCodeTarget(rmode())) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 118 | Address target = original_rinfo()->target_address(); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 119 | Code* code = Code::GetCodeFromTargetAddress(target); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 120 | if (code->is_inline_cache_stub() || RelocInfo::IsConstructCall(rmode())) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 121 | break_point_++; |
| 122 | return; |
| 123 | } |
| 124 | if (code->kind() == Code::STUB) { |
| 125 | if (type_ == ALL_BREAK_LOCATIONS) { |
| 126 | if (Debug::IsBreakStub(code)) { |
| 127 | break_point_++; |
| 128 | return; |
| 129 | } |
| 130 | } else { |
| 131 | ASSERT(type_ == SOURCE_BREAK_LOCATIONS); |
| 132 | if (Debug::IsSourceBreakStub(code)) { |
| 133 | break_point_++; |
| 134 | return; |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | // Check for break at return. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 141 | if (RelocInfo::IsJSReturn(rmode())) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 142 | // Set the positions to the end of the function. |
| 143 | if (debug_info_->shared()->HasSourceCode()) { |
| 144 | position_ = debug_info_->shared()->end_position() - |
| 145 | debug_info_->shared()->start_position(); |
| 146 | } else { |
| 147 | position_ = 0; |
| 148 | } |
| 149 | statement_position_ = position_; |
| 150 | break_point_++; |
| 151 | return; |
| 152 | } |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | |
| 157 | void BreakLocationIterator::Next(int count) { |
| 158 | while (count > 0) { |
| 159 | Next(); |
| 160 | count--; |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | |
| 165 | // Find the break point closest to the supplied address. |
| 166 | void BreakLocationIterator::FindBreakLocationFromAddress(Address pc) { |
| 167 | // Run through all break points to locate the one closest to the address. |
| 168 | int closest_break_point = 0; |
| 169 | int distance = kMaxInt; |
| 170 | while (!Done()) { |
| 171 | // Check if this break point is closer that what was previously found. |
| 172 | if (this->pc() < pc && pc - this->pc() < distance) { |
| 173 | closest_break_point = break_point(); |
| 174 | distance = pc - this->pc(); |
| 175 | // Check whether we can't get any closer. |
| 176 | if (distance == 0) break; |
| 177 | } |
| 178 | Next(); |
| 179 | } |
| 180 | |
| 181 | // Move to the break point found. |
| 182 | Reset(); |
| 183 | Next(closest_break_point); |
| 184 | } |
| 185 | |
| 186 | |
| 187 | // Find the break point closest to the supplied source position. |
| 188 | void BreakLocationIterator::FindBreakLocationFromPosition(int position) { |
| 189 | // Run through all break points to locate the one closest to the source |
| 190 | // position. |
| 191 | int closest_break_point = 0; |
| 192 | int distance = kMaxInt; |
| 193 | while (!Done()) { |
| 194 | // Check if this break point is closer that what was previously found. |
| 195 | if (position <= statement_position() && |
| 196 | statement_position() - position < distance) { |
| 197 | closest_break_point = break_point(); |
| 198 | distance = statement_position() - position; |
| 199 | // Check whether we can't get any closer. |
| 200 | if (distance == 0) break; |
| 201 | } |
| 202 | Next(); |
| 203 | } |
| 204 | |
| 205 | // Move to the break point found. |
| 206 | Reset(); |
| 207 | Next(closest_break_point); |
| 208 | } |
| 209 | |
| 210 | |
| 211 | void BreakLocationIterator::Reset() { |
| 212 | // Create relocation iterators for the two code objects. |
| 213 | if (reloc_iterator_ != NULL) delete reloc_iterator_; |
| 214 | if (reloc_iterator_original_ != NULL) delete reloc_iterator_original_; |
| 215 | reloc_iterator_ = new RelocIterator(debug_info_->code()); |
| 216 | reloc_iterator_original_ = new RelocIterator(debug_info_->original_code()); |
| 217 | |
| 218 | // Position at the first break point. |
| 219 | break_point_ = -1; |
| 220 | position_ = 1; |
| 221 | statement_position_ = 1; |
| 222 | Next(); |
| 223 | } |
| 224 | |
| 225 | |
| 226 | bool BreakLocationIterator::Done() const { |
| 227 | return RinfoDone(); |
| 228 | } |
| 229 | |
| 230 | |
| 231 | void BreakLocationIterator::SetBreakPoint(Handle<Object> break_point_object) { |
| 232 | // If there is not already a real break point here patch code with debug |
| 233 | // break. |
| 234 | if (!HasBreakPoint()) { |
| 235 | SetDebugBreak(); |
| 236 | } |
| 237 | ASSERT(IsDebugBreak()); |
| 238 | // Set the break point information. |
| 239 | DebugInfo::SetBreakPoint(debug_info_, code_position(), |
| 240 | position(), statement_position(), |
| 241 | break_point_object); |
| 242 | } |
| 243 | |
| 244 | |
| 245 | void BreakLocationIterator::ClearBreakPoint(Handle<Object> break_point_object) { |
| 246 | // Clear the break point information. |
| 247 | DebugInfo::ClearBreakPoint(debug_info_, code_position(), break_point_object); |
| 248 | // If there are no more break points here remove the debug break. |
| 249 | if (!HasBreakPoint()) { |
| 250 | ClearDebugBreak(); |
| 251 | ASSERT(!IsDebugBreak()); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | |
| 256 | void BreakLocationIterator::SetOneShot() { |
| 257 | // If there is a real break point here no more to do. |
| 258 | if (HasBreakPoint()) { |
| 259 | ASSERT(IsDebugBreak()); |
| 260 | return; |
| 261 | } |
| 262 | |
| 263 | // Patch code with debug break. |
| 264 | SetDebugBreak(); |
| 265 | } |
| 266 | |
| 267 | |
| 268 | void BreakLocationIterator::ClearOneShot() { |
| 269 | // If there is a real break point here no more to do. |
| 270 | if (HasBreakPoint()) { |
| 271 | ASSERT(IsDebugBreak()); |
| 272 | return; |
| 273 | } |
| 274 | |
| 275 | // Patch code removing debug break. |
| 276 | ClearDebugBreak(); |
| 277 | ASSERT(!IsDebugBreak()); |
| 278 | } |
| 279 | |
| 280 | |
| 281 | void BreakLocationIterator::SetDebugBreak() { |
| 282 | // If there is already a break point here just return. This might happen if |
v8.team.kasperl | 727e995 | 2008-09-02 14:56:44 +0000 | [diff] [blame] | 283 | // the same code is flooded with break points twice. Flooding the same |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 284 | // function twice might happen when stepping in a function with an exception |
| 285 | // handler as the handler and the function is the same. |
| 286 | if (IsDebugBreak()) { |
| 287 | return; |
| 288 | } |
| 289 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 290 | if (RelocInfo::IsJSReturn(rmode())) { |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 291 | // Patch the frame exit code with a break point. |
| 292 | SetDebugBreakAtReturn(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 293 | } else { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 294 | // Patch the IC call. |
| 295 | SetDebugBreakAtIC(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 296 | } |
| 297 | ASSERT(IsDebugBreak()); |
| 298 | } |
| 299 | |
| 300 | |
| 301 | void BreakLocationIterator::ClearDebugBreak() { |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 302 | if (RelocInfo::IsJSReturn(rmode())) { |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 303 | // Restore the frame exit code. |
| 304 | ClearDebugBreakAtReturn(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 305 | } else { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 306 | // Patch the IC call. |
| 307 | ClearDebugBreakAtIC(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 308 | } |
| 309 | ASSERT(!IsDebugBreak()); |
| 310 | } |
| 311 | |
| 312 | |
| 313 | void BreakLocationIterator::PrepareStepIn() { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 314 | HandleScope scope; |
| 315 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 316 | // Step in can only be prepared if currently positioned on an IC call or |
| 317 | // construct call. |
| 318 | Address target = rinfo()->target_address(); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 319 | Code* code = Code::GetCodeFromTargetAddress(target); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 320 | if (code->is_call_stub()) { |
| 321 | // Step in through IC call is handled by the runtime system. Therefore make |
| 322 | // sure that the any current IC is cleared and the runtime system is |
| 323 | // called. If the executing code has a debug break at the location change |
| 324 | // the call in the original code as it is the code there that will be |
| 325 | // executed in place of the debug break call. |
| 326 | Handle<Code> stub = ComputeCallDebugPrepareStepIn(code->arguments_count()); |
| 327 | if (IsDebugBreak()) { |
| 328 | original_rinfo()->set_target_address(stub->entry()); |
| 329 | } else { |
| 330 | rinfo()->set_target_address(stub->entry()); |
| 331 | } |
| 332 | } else { |
v8.team.kasperl | 727e995 | 2008-09-02 14:56:44 +0000 | [diff] [blame] | 333 | // Step in through constructs call requires no changes to the running code. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 334 | ASSERT(RelocInfo::IsConstructCall(rmode())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 335 | } |
| 336 | } |
| 337 | |
| 338 | |
| 339 | // Check whether the break point is at a position which will exit the function. |
| 340 | bool BreakLocationIterator::IsExit() const { |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 341 | return (RelocInfo::IsJSReturn(rmode())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | |
| 345 | bool BreakLocationIterator::HasBreakPoint() { |
| 346 | return debug_info_->HasBreakPoint(code_position()); |
| 347 | } |
| 348 | |
| 349 | |
| 350 | // Check whether there is a debug break at the current position. |
| 351 | bool BreakLocationIterator::IsDebugBreak() { |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 352 | if (RelocInfo::IsJSReturn(rmode())) { |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 353 | return IsDebugBreakAtReturn(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 354 | } else { |
| 355 | return Debug::IsDebugBreak(rinfo()->target_address()); |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 360 | void BreakLocationIterator::SetDebugBreakAtIC() { |
| 361 | // Patch the original code with the current address as the current address |
| 362 | // might have changed by the inline caching since the code was copied. |
| 363 | original_rinfo()->set_target_address(rinfo()->target_address()); |
| 364 | |
| 365 | RelocInfo::Mode mode = rmode(); |
| 366 | if (RelocInfo::IsCodeTarget(mode)) { |
| 367 | Address target = rinfo()->target_address(); |
| 368 | Handle<Code> code(Code::GetCodeFromTargetAddress(target)); |
| 369 | |
| 370 | // Patch the code to invoke the builtin debug break function matching the |
| 371 | // calling convention used by the call site. |
| 372 | Handle<Code> dbgbrk_code(Debug::FindDebugBreak(code, mode)); |
| 373 | rinfo()->set_target_address(dbgbrk_code->entry()); |
| 374 | |
| 375 | // For stubs that refer back to an inlined version clear the cached map for |
| 376 | // the inlined case to always go through the IC. As long as the break point |
| 377 | // is set the patching performed by the runtime system will take place in |
| 378 | // the code copy and will therefore have no effect on the running code |
| 379 | // keeping it from using the inlined code. |
| 380 | if (code->is_keyed_load_stub() && KeyedLoadIC::HasInlinedVersion(pc())) { |
| 381 | KeyedLoadIC::ClearInlinedVersion(pc()); |
| 382 | } |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | |
| 387 | void BreakLocationIterator::ClearDebugBreakAtIC() { |
| 388 | // Patch the code to the original invoke. |
| 389 | rinfo()->set_target_address(original_rinfo()->target_address()); |
| 390 | } |
| 391 | |
| 392 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 393 | Object* BreakLocationIterator::BreakPointObjects() { |
| 394 | return debug_info_->GetBreakPointObjects(code_position()); |
| 395 | } |
| 396 | |
| 397 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 398 | // Clear out all the debug break code. This is ONLY supposed to be used when |
| 399 | // shutting down the debugger as it will leave the break point information in |
| 400 | // DebugInfo even though the code is patched back to the non break point state. |
| 401 | void BreakLocationIterator::ClearAllDebugBreak() { |
| 402 | while (!Done()) { |
| 403 | ClearDebugBreak(); |
| 404 | Next(); |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 409 | bool BreakLocationIterator::RinfoDone() const { |
| 410 | ASSERT(reloc_iterator_->done() == reloc_iterator_original_->done()); |
| 411 | return reloc_iterator_->done(); |
| 412 | } |
| 413 | |
| 414 | |
| 415 | void BreakLocationIterator::RinfoNext() { |
| 416 | reloc_iterator_->next(); |
| 417 | reloc_iterator_original_->next(); |
| 418 | #ifdef DEBUG |
| 419 | ASSERT(reloc_iterator_->done() == reloc_iterator_original_->done()); |
| 420 | if (!reloc_iterator_->done()) { |
| 421 | ASSERT(rmode() == original_rmode()); |
| 422 | } |
| 423 | #endif |
| 424 | } |
| 425 | |
| 426 | |
| 427 | bool Debug::has_break_points_ = false; |
| 428 | DebugInfoListNode* Debug::debug_info_list_ = NULL; |
| 429 | |
| 430 | |
| 431 | // Threading support. |
| 432 | void Debug::ThreadInit() { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 433 | thread_local_.break_count_ = 0; |
| 434 | thread_local_.break_id_ = 0; |
| 435 | thread_local_.break_frame_id_ = StackFrame::NO_ID; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 436 | thread_local_.last_step_action_ = StepNone; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 437 | thread_local_.last_statement_position_ = RelocInfo::kNoPosition; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 438 | thread_local_.step_count_ = 0; |
| 439 | thread_local_.last_fp_ = 0; |
| 440 | thread_local_.step_into_fp_ = 0; |
| 441 | thread_local_.after_break_target_ = 0; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 442 | thread_local_.debugger_entry_ = NULL; |
| 443 | thread_local_.preemption_pending_ = false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | |
| 447 | JSCallerSavedBuffer Debug::registers_; |
| 448 | Debug::ThreadLocal Debug::thread_local_; |
| 449 | |
| 450 | |
| 451 | char* Debug::ArchiveDebug(char* storage) { |
| 452 | char* to = storage; |
| 453 | memcpy(to, reinterpret_cast<char*>(&thread_local_), sizeof(ThreadLocal)); |
| 454 | to += sizeof(ThreadLocal); |
| 455 | memcpy(to, reinterpret_cast<char*>(®isters_), sizeof(registers_)); |
| 456 | ThreadInit(); |
| 457 | ASSERT(to <= storage + ArchiveSpacePerThread()); |
| 458 | return storage + ArchiveSpacePerThread(); |
| 459 | } |
| 460 | |
| 461 | |
| 462 | char* Debug::RestoreDebug(char* storage) { |
| 463 | char* from = storage; |
| 464 | memcpy(reinterpret_cast<char*>(&thread_local_), from, sizeof(ThreadLocal)); |
| 465 | from += sizeof(ThreadLocal); |
| 466 | memcpy(reinterpret_cast<char*>(®isters_), from, sizeof(registers_)); |
| 467 | ASSERT(from <= storage + ArchiveSpacePerThread()); |
| 468 | return storage + ArchiveSpacePerThread(); |
| 469 | } |
| 470 | |
| 471 | |
| 472 | int Debug::ArchiveSpacePerThread() { |
| 473 | return sizeof(ThreadLocal) + sizeof(registers_); |
| 474 | } |
| 475 | |
| 476 | |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 477 | // Default break enabled. |
| 478 | bool Debug::disable_break_ = false; |
| 479 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 480 | // Default call debugger on uncaught exception. |
| 481 | bool Debug::break_on_exception_ = false; |
| 482 | bool Debug::break_on_uncaught_exception_ = true; |
| 483 | |
| 484 | Handle<Context> Debug::debug_context_ = Handle<Context>(); |
| 485 | Code* Debug::debug_break_return_entry_ = NULL; |
| 486 | Code* Debug::debug_break_return_ = NULL; |
| 487 | |
| 488 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 489 | void Debug::HandleWeakDebugInfo(v8::Persistent<v8::Value> obj, void* data) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 490 | DebugInfoListNode* node = reinterpret_cast<DebugInfoListNode*>(data); |
| 491 | RemoveDebugInfo(node->debug_info()); |
| 492 | #ifdef DEBUG |
| 493 | node = Debug::debug_info_list_; |
| 494 | while (node != NULL) { |
| 495 | ASSERT(node != reinterpret_cast<DebugInfoListNode*>(data)); |
| 496 | node = node->next(); |
| 497 | } |
| 498 | #endif |
| 499 | } |
| 500 | |
| 501 | |
| 502 | DebugInfoListNode::DebugInfoListNode(DebugInfo* debug_info): next_(NULL) { |
| 503 | // Globalize the request debug info object and make it weak. |
| 504 | debug_info_ = Handle<DebugInfo>::cast((GlobalHandles::Create(debug_info))); |
| 505 | GlobalHandles::MakeWeak(reinterpret_cast<Object**>(debug_info_.location()), |
| 506 | this, Debug::HandleWeakDebugInfo); |
| 507 | } |
| 508 | |
| 509 | |
| 510 | DebugInfoListNode::~DebugInfoListNode() { |
| 511 | GlobalHandles::Destroy(reinterpret_cast<Object**>(debug_info_.location())); |
| 512 | } |
| 513 | |
| 514 | |
| 515 | void Debug::Setup(bool create_heap_objects) { |
| 516 | ThreadInit(); |
| 517 | if (create_heap_objects) { |
| 518 | // Get code to handle entry to debug break on return. |
| 519 | debug_break_return_entry_ = |
| 520 | Builtins::builtin(Builtins::Return_DebugBreakEntry); |
| 521 | ASSERT(debug_break_return_entry_->IsCode()); |
| 522 | |
| 523 | // Get code to handle debug break on return. |
| 524 | debug_break_return_ = |
| 525 | Builtins::builtin(Builtins::Return_DebugBreak); |
| 526 | ASSERT(debug_break_return_->IsCode()); |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | |
| 531 | bool Debug::CompileDebuggerScript(int index) { |
| 532 | HandleScope scope; |
| 533 | |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 534 | // Bail out if the index is invalid. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 535 | if (index == -1) { |
| 536 | return false; |
| 537 | } |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 538 | |
| 539 | // Find source and name for the requested script. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 540 | Handle<String> source_code = Bootstrapper::NativesSourceLookup(index); |
| 541 | Vector<const char> name = Natives::GetScriptName(index); |
| 542 | Handle<String> script_name = Factory::NewStringFromAscii(name); |
| 543 | |
| 544 | // Compile the script. |
| 545 | bool allow_natives_syntax = FLAG_allow_natives_syntax; |
| 546 | FLAG_allow_natives_syntax = true; |
| 547 | Handle<JSFunction> boilerplate; |
| 548 | boilerplate = Compiler::Compile(source_code, script_name, 0, 0, NULL, NULL); |
| 549 | FLAG_allow_natives_syntax = allow_natives_syntax; |
| 550 | |
| 551 | // Silently ignore stack overflows during compilation. |
| 552 | if (boilerplate.is_null()) { |
| 553 | ASSERT(Top::has_pending_exception()); |
| 554 | Top::clear_pending_exception(); |
| 555 | return false; |
| 556 | } |
| 557 | |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 558 | // Execute the boilerplate function in the debugger context. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 559 | Handle<Context> context = Top::global_context(); |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 560 | bool caught_exception = false; |
| 561 | Handle<JSFunction> function = |
| 562 | Factory::NewFunctionFromBoilerplate(boilerplate, context); |
| 563 | Handle<Object> result = |
| 564 | Execution::TryCall(function, Handle<Object>(context->global()), |
| 565 | 0, NULL, &caught_exception); |
| 566 | |
| 567 | // Check for caught exceptions. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 568 | if (caught_exception) { |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 569 | Handle<Object> message = MessageHandler::MakeMessageObject( |
| 570 | "error_loading_debugger", NULL, HandleVector<Object>(&result, 1), |
| 571 | Handle<String>()); |
| 572 | MessageHandler::ReportMessage(NULL, message); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 573 | return false; |
| 574 | } |
| 575 | |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 576 | // Mark this script as native and return successfully. |
| 577 | Handle<Script> script(Script::cast(function->shared()->script())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 578 | script->set_type(Smi::FromInt(SCRIPT_TYPE_NATIVE)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 579 | return true; |
| 580 | } |
| 581 | |
| 582 | |
| 583 | bool Debug::Load() { |
| 584 | // Return if debugger is already loaded. |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 585 | if (IsLoaded()) return true; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 586 | |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 587 | // Bail out if we're already in the process of compiling the native |
| 588 | // JavaScript source code for the debugger. |
mads.s.ager | cbaa060 | 2008-08-14 13:41:48 +0000 | [diff] [blame] | 589 | if (Debugger::compiling_natives() || Debugger::is_loading_debugger()) |
| 590 | return false; |
| 591 | Debugger::set_loading_debugger(true); |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 592 | |
| 593 | // Disable breakpoints and interrupts while compiling and running the |
| 594 | // debugger scripts including the context creation code. |
| 595 | DisableBreak disable(true); |
| 596 | PostponeInterruptsScope postpone; |
| 597 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 598 | // Create the debugger context. |
| 599 | HandleScope scope; |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 600 | Handle<Context> context = |
| 601 | Bootstrapper::CreateEnvironment(Handle<Object>::null(), |
| 602 | v8::Handle<ObjectTemplate>(), |
| 603 | NULL); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 604 | |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 605 | // Use the debugger context. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 606 | SaveContext save; |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 607 | Top::set_context(*context); |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 608 | |
| 609 | // Expose the builtins object in the debugger context. |
| 610 | Handle<String> key = Factory::LookupAsciiSymbol("builtins"); |
| 611 | Handle<GlobalObject> global = Handle<GlobalObject>(context->global()); |
| 612 | SetProperty(global, key, Handle<Object>(global->builtins()), NONE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 613 | |
| 614 | // Compile the JavaScript for the debugger in the debugger context. |
| 615 | Debugger::set_compiling_natives(true); |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 616 | bool caught_exception = |
| 617 | !CompileDebuggerScript(Natives::GetIndex("mirror")) || |
| 618 | !CompileDebuggerScript(Natives::GetIndex("debug")); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 619 | Debugger::set_compiling_natives(false); |
| 620 | |
mads.s.ager | cbaa060 | 2008-08-14 13:41:48 +0000 | [diff] [blame] | 621 | // Make sure we mark the debugger as not loading before we might |
| 622 | // return. |
| 623 | Debugger::set_loading_debugger(false); |
| 624 | |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 625 | // Check for caught exceptions. |
| 626 | if (caught_exception) return false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 627 | |
| 628 | // Debugger loaded. |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 629 | debug_context_ = Handle<Context>::cast(GlobalHandles::Create(*context)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 630 | return true; |
| 631 | } |
| 632 | |
| 633 | |
| 634 | void Debug::Unload() { |
| 635 | // Return debugger is not loaded. |
| 636 | if (!IsLoaded()) { |
| 637 | return; |
| 638 | } |
| 639 | |
| 640 | // Clear debugger context global handle. |
| 641 | GlobalHandles::Destroy(reinterpret_cast<Object**>(debug_context_.location())); |
| 642 | debug_context_ = Handle<Context>(); |
| 643 | } |
| 644 | |
| 645 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 646 | // Set the flag indicating that preemption happened during debugging. |
| 647 | void Debug::PreemptionWhileInDebugger() { |
| 648 | ASSERT(InDebugger()); |
| 649 | Debug::set_preemption_pending(true); |
| 650 | } |
| 651 | |
| 652 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 653 | void Debug::Iterate(ObjectVisitor* v) { |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 654 | v->VisitPointer(bit_cast<Object**, Code**>(&(debug_break_return_entry_))); |
| 655 | v->VisitPointer(bit_cast<Object**, Code**>(&(debug_break_return_))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 656 | } |
| 657 | |
| 658 | |
| 659 | Object* Debug::Break(Arguments args) { |
| 660 | HandleScope scope; |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 661 | ASSERT(args.length() == 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 662 | |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 663 | // Get the top-most JavaScript frame. |
| 664 | JavaScriptFrameIterator it; |
| 665 | JavaScriptFrame* frame = it.frame(); |
| 666 | |
| 667 | // Just continue if breaks are disabled or debugger cannot be loaded. |
| 668 | if (disable_break() || !Load()) { |
| 669 | SetAfterBreakTarget(frame); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 670 | return Heap::undefined_value(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 671 | } |
| 672 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 673 | // Enter the debugger. |
| 674 | EnterDebugger debugger; |
| 675 | if (debugger.FailedToEnter()) { |
| 676 | return Heap::undefined_value(); |
| 677 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 678 | |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 679 | // Postpone interrupt during breakpoint processing. |
| 680 | PostponeInterruptsScope postpone; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 681 | |
| 682 | // Get the debug info (create it if it does not exist). |
| 683 | Handle<SharedFunctionInfo> shared = |
| 684 | Handle<SharedFunctionInfo>(JSFunction::cast(frame->function())->shared()); |
| 685 | Handle<DebugInfo> debug_info = GetDebugInfo(shared); |
| 686 | |
| 687 | // Find the break point where execution has stopped. |
| 688 | BreakLocationIterator break_location_iterator(debug_info, |
| 689 | ALL_BREAK_LOCATIONS); |
| 690 | break_location_iterator.FindBreakLocationFromAddress(frame->pc()); |
| 691 | |
| 692 | // Check whether step next reached a new statement. |
| 693 | if (!StepNextContinue(&break_location_iterator, frame)) { |
| 694 | // Decrease steps left if performing multiple steps. |
| 695 | if (thread_local_.step_count_ > 0) { |
| 696 | thread_local_.step_count_--; |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | // If there is one or more real break points check whether any of these are |
| 701 | // triggered. |
| 702 | Handle<Object> break_points_hit(Heap::undefined_value()); |
| 703 | if (break_location_iterator.HasBreakPoint()) { |
| 704 | Handle<Object> break_point_objects = |
| 705 | Handle<Object>(break_location_iterator.BreakPointObjects()); |
| 706 | break_points_hit = CheckBreakPoints(break_point_objects); |
| 707 | } |
| 708 | |
| 709 | // Notify debugger if a real break point is triggered or if performing single |
| 710 | // stepping with no more steps to perform. Otherwise do another step. |
| 711 | if (!break_points_hit->IsUndefined() || |
| 712 | (thread_local_.last_step_action_ != StepNone && |
| 713 | thread_local_.step_count_ == 0)) { |
| 714 | // Clear all current stepping setup. |
| 715 | ClearStepping(); |
| 716 | |
| 717 | // Notify the debug event listeners. |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 718 | Debugger::OnDebugBreak(break_points_hit, false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 719 | } else if (thread_local_.last_step_action_ != StepNone) { |
| 720 | // Hold on to last step action as it is cleared by the call to |
| 721 | // ClearStepping. |
| 722 | StepAction step_action = thread_local_.last_step_action_; |
| 723 | int step_count = thread_local_.step_count_; |
| 724 | |
| 725 | // Clear all current stepping setup. |
| 726 | ClearStepping(); |
| 727 | |
| 728 | // Set up for the remaining steps. |
| 729 | PrepareStep(step_action, step_count); |
| 730 | } |
| 731 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 732 | // Install jump to the call address which was overwritten. |
| 733 | SetAfterBreakTarget(frame); |
| 734 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 735 | return Heap::undefined_value(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 736 | } |
| 737 | |
| 738 | |
| 739 | // Check the break point objects for whether one or more are actually |
| 740 | // triggered. This function returns a JSArray with the break point objects |
| 741 | // which is triggered. |
| 742 | Handle<Object> Debug::CheckBreakPoints(Handle<Object> break_point_objects) { |
| 743 | int break_points_hit_count = 0; |
| 744 | Handle<JSArray> break_points_hit = Factory::NewJSArray(1); |
| 745 | |
v8.team.kasperl | 727e995 | 2008-09-02 14:56:44 +0000 | [diff] [blame] | 746 | // If there are multiple break points they are in a FixedArray. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 747 | ASSERT(!break_point_objects->IsUndefined()); |
| 748 | if (break_point_objects->IsFixedArray()) { |
| 749 | Handle<FixedArray> array(FixedArray::cast(*break_point_objects)); |
| 750 | for (int i = 0; i < array->length(); i++) { |
| 751 | Handle<Object> o(array->get(i)); |
| 752 | if (CheckBreakPoint(o)) { |
| 753 | break_points_hit->SetElement(break_points_hit_count++, *o); |
| 754 | } |
| 755 | } |
| 756 | } else { |
| 757 | if (CheckBreakPoint(break_point_objects)) { |
| 758 | break_points_hit->SetElement(break_points_hit_count++, |
| 759 | *break_point_objects); |
| 760 | } |
| 761 | } |
| 762 | |
| 763 | // Return undefined if no break points where triggered. |
| 764 | if (break_points_hit_count == 0) { |
| 765 | return Factory::undefined_value(); |
| 766 | } |
| 767 | return break_points_hit; |
| 768 | } |
| 769 | |
| 770 | |
| 771 | // Check whether a single break point object is triggered. |
| 772 | bool Debug::CheckBreakPoint(Handle<Object> break_point_object) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 773 | HandleScope scope; |
| 774 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 775 | // Ignore check if break point object is not a JSObject. |
| 776 | if (!break_point_object->IsJSObject()) return true; |
| 777 | |
| 778 | // Get the function CheckBreakPoint (defined in debug.js). |
| 779 | Handle<JSFunction> check_break_point = |
| 780 | Handle<JSFunction>(JSFunction::cast( |
| 781 | debug_context()->global()->GetProperty( |
| 782 | *Factory::LookupAsciiSymbol("IsBreakPointTriggered")))); |
| 783 | |
| 784 | // Get the break id as an object. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 785 | Handle<Object> break_id = Factory::NewNumberFromInt(Debug::break_id()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 786 | |
| 787 | // Call HandleBreakPointx. |
| 788 | bool caught_exception = false; |
| 789 | const int argc = 2; |
| 790 | Object** argv[argc] = { |
| 791 | break_id.location(), |
| 792 | reinterpret_cast<Object**>(break_point_object.location()) |
| 793 | }; |
| 794 | Handle<Object> result = Execution::TryCall(check_break_point, |
| 795 | Top::builtins(), argc, argv, |
| 796 | &caught_exception); |
| 797 | |
| 798 | // If exception or non boolean result handle as not triggered |
| 799 | if (caught_exception || !result->IsBoolean()) { |
| 800 | return false; |
| 801 | } |
| 802 | |
| 803 | // Return whether the break point is triggered. |
| 804 | return *result == Heap::true_value(); |
| 805 | } |
| 806 | |
| 807 | |
| 808 | // Check whether the function has debug information. |
| 809 | bool Debug::HasDebugInfo(Handle<SharedFunctionInfo> shared) { |
| 810 | return !shared->debug_info()->IsUndefined(); |
| 811 | } |
| 812 | |
| 813 | |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 814 | // Return the debug info for this function. EnsureDebugInfo must be called |
| 815 | // prior to ensure the debug info has been generated for shared. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 816 | Handle<DebugInfo> Debug::GetDebugInfo(Handle<SharedFunctionInfo> shared) { |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 817 | ASSERT(HasDebugInfo(shared)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 818 | return Handle<DebugInfo>(DebugInfo::cast(shared->debug_info())); |
| 819 | } |
| 820 | |
| 821 | |
| 822 | void Debug::SetBreakPoint(Handle<SharedFunctionInfo> shared, |
| 823 | int source_position, |
| 824 | Handle<Object> break_point_object) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 825 | HandleScope scope; |
| 826 | |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 827 | if (!EnsureDebugInfo(shared)) { |
| 828 | // Return if retrieving debug info failed. |
| 829 | return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 830 | } |
| 831 | |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 832 | Handle<DebugInfo> debug_info = GetDebugInfo(shared); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 833 | // Source positions starts with zero. |
| 834 | ASSERT(source_position >= 0); |
| 835 | |
| 836 | // Find the break point and change it. |
| 837 | BreakLocationIterator it(debug_info, SOURCE_BREAK_LOCATIONS); |
| 838 | it.FindBreakLocationFromPosition(source_position); |
| 839 | it.SetBreakPoint(break_point_object); |
| 840 | |
| 841 | // At least one active break point now. |
| 842 | ASSERT(debug_info->GetBreakPointCount() > 0); |
| 843 | } |
| 844 | |
| 845 | |
| 846 | void Debug::ClearBreakPoint(Handle<Object> break_point_object) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 847 | HandleScope scope; |
| 848 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 849 | DebugInfoListNode* node = debug_info_list_; |
| 850 | while (node != NULL) { |
| 851 | Object* result = DebugInfo::FindBreakPointInfo(node->debug_info(), |
| 852 | break_point_object); |
| 853 | if (!result->IsUndefined()) { |
| 854 | // Get information in the break point. |
| 855 | BreakPointInfo* break_point_info = BreakPointInfo::cast(result); |
| 856 | Handle<DebugInfo> debug_info = node->debug_info(); |
| 857 | Handle<SharedFunctionInfo> shared(debug_info->shared()); |
| 858 | int source_position = break_point_info->statement_position()->value(); |
| 859 | |
| 860 | // Source positions starts with zero. |
| 861 | ASSERT(source_position >= 0); |
| 862 | |
| 863 | // Find the break point and clear it. |
| 864 | BreakLocationIterator it(debug_info, SOURCE_BREAK_LOCATIONS); |
| 865 | it.FindBreakLocationFromPosition(source_position); |
| 866 | it.ClearBreakPoint(break_point_object); |
| 867 | |
| 868 | // If there are no more break points left remove the debug info for this |
| 869 | // function. |
| 870 | if (debug_info->GetBreakPointCount() == 0) { |
| 871 | RemoveDebugInfo(debug_info); |
| 872 | } |
| 873 | |
| 874 | return; |
| 875 | } |
| 876 | node = node->next(); |
| 877 | } |
| 878 | } |
| 879 | |
| 880 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 881 | void Debug::ClearAllBreakPoints() { |
| 882 | DebugInfoListNode* node = debug_info_list_; |
| 883 | while (node != NULL) { |
| 884 | // Remove all debug break code. |
| 885 | BreakLocationIterator it(node->debug_info(), ALL_BREAK_LOCATIONS); |
| 886 | it.ClearAllDebugBreak(); |
| 887 | node = node->next(); |
| 888 | } |
| 889 | |
| 890 | // Remove all debug info. |
| 891 | while (debug_info_list_ != NULL) { |
| 892 | RemoveDebugInfo(debug_info_list_->debug_info()); |
| 893 | } |
| 894 | } |
| 895 | |
| 896 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 897 | void Debug::FloodWithOneShot(Handle<SharedFunctionInfo> shared) { |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 898 | // Make sure the function has setup the debug info. |
| 899 | if (!EnsureDebugInfo(shared)) { |
| 900 | // Return if we failed to retrieve the debug info. |
| 901 | return; |
| 902 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 903 | |
| 904 | // Flood the function with break points. |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 905 | BreakLocationIterator it(GetDebugInfo(shared), ALL_BREAK_LOCATIONS); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 906 | while (!it.Done()) { |
| 907 | it.SetOneShot(); |
| 908 | it.Next(); |
| 909 | } |
| 910 | } |
| 911 | |
| 912 | |
| 913 | void Debug::FloodHandlerWithOneShot() { |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 914 | // Iterate through the JavaScript stack looking for handlers. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 915 | StackFrame::Id id = break_frame_id(); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 916 | if (id == StackFrame::NO_ID) { |
| 917 | // If there is no JavaScript stack don't do anything. |
| 918 | return; |
| 919 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 920 | for (JavaScriptFrameIterator it(id); !it.done(); it.Advance()) { |
| 921 | JavaScriptFrame* frame = it.frame(); |
| 922 | if (frame->HasHandler()) { |
| 923 | Handle<SharedFunctionInfo> shared = |
| 924 | Handle<SharedFunctionInfo>( |
| 925 | JSFunction::cast(frame->function())->shared()); |
| 926 | // Flood the function with the catch block with break points |
| 927 | FloodWithOneShot(shared); |
| 928 | return; |
| 929 | } |
| 930 | } |
| 931 | } |
| 932 | |
| 933 | |
| 934 | void Debug::ChangeBreakOnException(ExceptionBreakType type, bool enable) { |
| 935 | if (type == BreakUncaughtException) { |
| 936 | break_on_uncaught_exception_ = enable; |
| 937 | } else { |
| 938 | break_on_exception_ = enable; |
| 939 | } |
| 940 | } |
| 941 | |
| 942 | |
| 943 | void Debug::PrepareStep(StepAction step_action, int step_count) { |
| 944 | HandleScope scope; |
| 945 | ASSERT(Debug::InDebugger()); |
| 946 | |
| 947 | // Remember this step action and count. |
| 948 | thread_local_.last_step_action_ = step_action; |
| 949 | thread_local_.step_count_ = step_count; |
| 950 | |
| 951 | // Get the frame where the execution has stopped and skip the debug frame if |
| 952 | // any. The debug frame will only be present if execution was stopped due to |
| 953 | // hitting a break point. In other situations (e.g. unhandled exception) the |
| 954 | // debug frame is not present. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 955 | StackFrame::Id id = break_frame_id(); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 956 | if (id == StackFrame::NO_ID) { |
| 957 | // If there is no JavaScript stack don't do anything. |
| 958 | return; |
| 959 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 960 | JavaScriptFrameIterator frames_it(id); |
| 961 | JavaScriptFrame* frame = frames_it.frame(); |
| 962 | |
| 963 | // First of all ensure there is one-shot break points in the top handler |
| 964 | // if any. |
| 965 | FloodHandlerWithOneShot(); |
| 966 | |
| 967 | // If the function on the top frame is unresolved perform step out. This will |
| 968 | // be the case when calling unknown functions and having the debugger stopped |
| 969 | // in an unhandled exception. |
| 970 | if (!frame->function()->IsJSFunction()) { |
| 971 | // Step out: Find the calling JavaScript frame and flood it with |
| 972 | // breakpoints. |
| 973 | frames_it.Advance(); |
| 974 | // Fill the function to return to with one-shot break points. |
| 975 | JSFunction* function = JSFunction::cast(frames_it.frame()->function()); |
| 976 | FloodWithOneShot(Handle<SharedFunctionInfo>(function->shared())); |
| 977 | return; |
| 978 | } |
| 979 | |
| 980 | // Get the debug info (create it if it does not exist). |
| 981 | Handle<SharedFunctionInfo> shared = |
| 982 | Handle<SharedFunctionInfo>(JSFunction::cast(frame->function())->shared()); |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 983 | if (!EnsureDebugInfo(shared)) { |
| 984 | // Return if ensuring debug info failed. |
| 985 | return; |
| 986 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 987 | Handle<DebugInfo> debug_info = GetDebugInfo(shared); |
| 988 | |
| 989 | // Find the break location where execution has stopped. |
| 990 | BreakLocationIterator it(debug_info, ALL_BREAK_LOCATIONS); |
| 991 | it.FindBreakLocationFromAddress(frame->pc()); |
| 992 | |
| 993 | // Compute whether or not the target is a call target. |
| 994 | bool is_call_target = false; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 995 | if (RelocInfo::IsCodeTarget(it.rinfo()->rmode())) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 996 | Address target = it.rinfo()->target_address(); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 997 | Code* code = Code::GetCodeFromTargetAddress(target); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 998 | if (code->is_call_stub()) is_call_target = true; |
| 999 | } |
| 1000 | |
v8.team.kasperl | 727e995 | 2008-09-02 14:56:44 +0000 | [diff] [blame] | 1001 | // If this is the last break code target step out is the only possibility. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1002 | if (it.IsExit() || step_action == StepOut) { |
| 1003 | // Step out: If there is a JavaScript caller frame, we need to |
| 1004 | // flood it with breakpoints. |
| 1005 | frames_it.Advance(); |
| 1006 | if (!frames_it.done()) { |
| 1007 | // Fill the function to return to with one-shot break points. |
| 1008 | JSFunction* function = JSFunction::cast(frames_it.frame()->function()); |
| 1009 | FloodWithOneShot(Handle<SharedFunctionInfo>(function->shared())); |
| 1010 | } |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1011 | } else if (!(is_call_target || RelocInfo::IsConstructCall(it.rmode())) || |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1012 | step_action == StepNext || step_action == StepMin) { |
| 1013 | // Step next or step min. |
| 1014 | |
| 1015 | // Fill the current function with one-shot break points. |
| 1016 | FloodWithOneShot(shared); |
| 1017 | |
| 1018 | // Remember source position and frame to handle step next. |
| 1019 | thread_local_.last_statement_position_ = |
| 1020 | debug_info->code()->SourceStatementPosition(frame->pc()); |
| 1021 | thread_local_.last_fp_ = frame->fp(); |
| 1022 | } else { |
| 1023 | // Fill the current function with one-shot break points even for step in on |
| 1024 | // a call target as the function called might be a native function for |
| 1025 | // which step in will not stop. |
| 1026 | FloodWithOneShot(shared); |
| 1027 | |
| 1028 | // Step in or Step in min |
| 1029 | it.PrepareStepIn(); |
| 1030 | ActivateStepIn(frame); |
| 1031 | } |
| 1032 | } |
| 1033 | |
| 1034 | |
| 1035 | // Check whether the current debug break should be reported to the debugger. It |
| 1036 | // is used to have step next and step in only report break back to the debugger |
| 1037 | // if on a different frame or in a different statement. In some situations |
| 1038 | // there will be several break points in the same statement when the code is |
v8.team.kasperl | 727e995 | 2008-09-02 14:56:44 +0000 | [diff] [blame] | 1039 | // flooded with one-shot break points. This function helps to perform several |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1040 | // steps before reporting break back to the debugger. |
| 1041 | bool Debug::StepNextContinue(BreakLocationIterator* break_location_iterator, |
| 1042 | JavaScriptFrame* frame) { |
| 1043 | // If the step last action was step next or step in make sure that a new |
| 1044 | // statement is hit. |
| 1045 | if (thread_local_.last_step_action_ == StepNext || |
| 1046 | thread_local_.last_step_action_ == StepIn) { |
| 1047 | // Never continue if returning from function. |
| 1048 | if (break_location_iterator->IsExit()) return false; |
| 1049 | |
| 1050 | // Continue if we are still on the same frame and in the same statement. |
| 1051 | int current_statement_position = |
| 1052 | break_location_iterator->code()->SourceStatementPosition(frame->pc()); |
| 1053 | return thread_local_.last_fp_ == frame->fp() && |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1054 | thread_local_.last_statement_position_ == current_statement_position; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1055 | } |
| 1056 | |
| 1057 | // No step next action - don't continue. |
| 1058 | return false; |
| 1059 | } |
| 1060 | |
| 1061 | |
| 1062 | // Check whether the code object at the specified address is a debug break code |
| 1063 | // object. |
| 1064 | bool Debug::IsDebugBreak(Address addr) { |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 1065 | Code* code = Code::GetCodeFromTargetAddress(addr); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1066 | return code->ic_state() == DEBUG_BREAK; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1067 | } |
| 1068 | |
| 1069 | |
| 1070 | // Check whether a code stub with the specified major key is a possible break |
| 1071 | // point location when looking for source break locations. |
| 1072 | bool Debug::IsSourceBreakStub(Code* code) { |
| 1073 | CodeStub::Major major_key = code->major_key(); |
| 1074 | return major_key == CodeStub::CallFunction; |
| 1075 | } |
| 1076 | |
| 1077 | |
| 1078 | // Check whether a code stub with the specified major key is a possible break |
| 1079 | // location. |
| 1080 | bool Debug::IsBreakStub(Code* code) { |
| 1081 | CodeStub::Major major_key = code->major_key(); |
| 1082 | return major_key == CodeStub::CallFunction || |
| 1083 | major_key == CodeStub::StackCheck; |
| 1084 | } |
| 1085 | |
| 1086 | |
| 1087 | // Find the builtin to use for invoking the debug break |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1088 | Handle<Code> Debug::FindDebugBreak(Handle<Code> code, RelocInfo::Mode mode) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1089 | // Find the builtin debug break function matching the calling convention |
| 1090 | // used by the call site. |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1091 | if (code->is_inline_cache_stub()) { |
| 1092 | if (code->is_call_stub()) { |
| 1093 | return ComputeCallDebugBreak(code->arguments_count()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1094 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1095 | if (code->is_load_stub()) { |
| 1096 | return Handle<Code>(Builtins::builtin(Builtins::LoadIC_DebugBreak)); |
| 1097 | } |
| 1098 | if (code->is_store_stub()) { |
| 1099 | return Handle<Code>(Builtins::builtin(Builtins::StoreIC_DebugBreak)); |
| 1100 | } |
| 1101 | if (code->is_keyed_load_stub()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1102 | Handle<Code> result = |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1103 | Handle<Code>(Builtins::builtin(Builtins::KeyedLoadIC_DebugBreak)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1104 | return result; |
| 1105 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1106 | if (code->is_keyed_store_stub()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1107 | Handle<Code> result = |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1108 | Handle<Code>(Builtins::builtin(Builtins::KeyedStoreIC_DebugBreak)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1109 | return result; |
| 1110 | } |
| 1111 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1112 | if (RelocInfo::IsConstructCall(mode)) { |
| 1113 | Handle<Code> result = |
| 1114 | Handle<Code>(Builtins::builtin(Builtins::ConstructCall_DebugBreak)); |
| 1115 | return result; |
| 1116 | } |
| 1117 | if (code->kind() == Code::STUB) { |
| 1118 | ASSERT(code->major_key() == CodeStub::CallFunction || |
| 1119 | code->major_key() == CodeStub::StackCheck); |
| 1120 | Handle<Code> result = |
| 1121 | Handle<Code>(Builtins::builtin(Builtins::StubNoRegisters_DebugBreak)); |
| 1122 | return result; |
| 1123 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1124 | |
| 1125 | UNREACHABLE(); |
| 1126 | return Handle<Code>::null(); |
| 1127 | } |
| 1128 | |
| 1129 | |
| 1130 | // Simple function for returning the source positions for active break points. |
| 1131 | Handle<Object> Debug::GetSourceBreakLocations( |
| 1132 | Handle<SharedFunctionInfo> shared) { |
| 1133 | if (!HasDebugInfo(shared)) return Handle<Object>(Heap::undefined_value()); |
| 1134 | Handle<DebugInfo> debug_info = GetDebugInfo(shared); |
| 1135 | if (debug_info->GetBreakPointCount() == 0) { |
| 1136 | return Handle<Object>(Heap::undefined_value()); |
| 1137 | } |
| 1138 | Handle<FixedArray> locations = |
| 1139 | Factory::NewFixedArray(debug_info->GetBreakPointCount()); |
| 1140 | int count = 0; |
| 1141 | for (int i = 0; i < debug_info->break_points()->length(); i++) { |
| 1142 | if (!debug_info->break_points()->get(i)->IsUndefined()) { |
| 1143 | BreakPointInfo* break_point_info = |
| 1144 | BreakPointInfo::cast(debug_info->break_points()->get(i)); |
| 1145 | if (break_point_info->GetBreakPointCount() > 0) { |
| 1146 | locations->set(count++, break_point_info->statement_position()); |
| 1147 | } |
| 1148 | } |
| 1149 | } |
| 1150 | return locations; |
| 1151 | } |
| 1152 | |
| 1153 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1154 | void Debug::NewBreak(StackFrame::Id break_frame_id) { |
| 1155 | thread_local_.break_frame_id_ = break_frame_id; |
| 1156 | thread_local_.break_id_ = ++thread_local_.break_count_; |
| 1157 | } |
| 1158 | |
| 1159 | |
| 1160 | void Debug::SetBreak(StackFrame::Id break_frame_id, int break_id) { |
| 1161 | thread_local_.break_frame_id_ = break_frame_id; |
| 1162 | thread_local_.break_id_ = break_id; |
| 1163 | } |
| 1164 | |
| 1165 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1166 | // Handle stepping into a function. |
| 1167 | void Debug::HandleStepIn(Handle<JSFunction> function, |
| 1168 | Address fp, |
| 1169 | bool is_constructor) { |
| 1170 | // If the frame pointer is not supplied by the caller find it. |
| 1171 | if (fp == 0) { |
| 1172 | StackFrameIterator it; |
| 1173 | it.Advance(); |
| 1174 | // For constructor functions skip another frame. |
| 1175 | if (is_constructor) { |
| 1176 | ASSERT(it.frame()->is_construct()); |
| 1177 | it.Advance(); |
| 1178 | } |
| 1179 | fp = it.frame()->fp(); |
| 1180 | } |
| 1181 | |
| 1182 | // Flood the function with one-shot break points if it is called from where |
| 1183 | // step into was requested. |
| 1184 | if (fp == Debug::step_in_fp()) { |
| 1185 | // Don't allow step into functions in the native context. |
| 1186 | if (function->context()->global() != Top::context()->builtins()) { |
kasperl@chromium.org | acae378 | 2009-04-11 09:17:08 +0000 | [diff] [blame] | 1187 | if (function->shared()->code() == |
| 1188 | Builtins::builtin(Builtins::FunctionApply) || |
| 1189 | function->shared()->code() == |
| 1190 | Builtins::builtin(Builtins::FunctionCall)) { |
| 1191 | // Handle function.apply and function.call separately to flood the |
| 1192 | // function to be called and not the code for Builtins::FunctionApply or |
| 1193 | // Builtins::FunctionCall. At the point of the call IC to call either |
| 1194 | // Builtins::FunctionApply or Builtins::FunctionCall the expression |
| 1195 | // stack has the following content: |
| 1196 | // symbol "apply" or "call" |
| 1197 | // function apply or call was called on |
| 1198 | // receiver for apply or call (first parameter to apply or call) |
| 1199 | // ... further arguments to apply or call. |
| 1200 | JavaScriptFrameIterator it; |
| 1201 | ASSERT(it.frame()->fp() == fp); |
| 1202 | ASSERT(it.frame()->GetExpression(1)->IsJSFunction()); |
| 1203 | if (it.frame()->GetExpression(1)->IsJSFunction()) { |
| 1204 | Handle<JSFunction> |
| 1205 | actual_function(JSFunction::cast(it.frame()->GetExpression(1))); |
| 1206 | Handle<SharedFunctionInfo> actual_shared(actual_function->shared()); |
| 1207 | Debug::FloodWithOneShot(actual_shared); |
| 1208 | } |
| 1209 | } else { |
| 1210 | Debug::FloodWithOneShot(Handle<SharedFunctionInfo>(function->shared())); |
| 1211 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1212 | } |
| 1213 | } |
| 1214 | } |
| 1215 | |
| 1216 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1217 | void Debug::ClearStepping() { |
| 1218 | // Clear the various stepping setup. |
| 1219 | ClearOneShot(); |
| 1220 | ClearStepIn(); |
| 1221 | ClearStepNext(); |
| 1222 | |
| 1223 | // Clear multiple step counter. |
| 1224 | thread_local_.step_count_ = 0; |
| 1225 | } |
| 1226 | |
| 1227 | // Clears all the one-shot break points that are currently set. Normally this |
| 1228 | // function is called each time a break point is hit as one shot break points |
| 1229 | // are used to support stepping. |
| 1230 | void Debug::ClearOneShot() { |
| 1231 | // The current implementation just runs through all the breakpoints. When the |
v8.team.kasperl | 727e995 | 2008-09-02 14:56:44 +0000 | [diff] [blame] | 1232 | // last break point for a function is removed that function is automatically |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1233 | // removed from the list. |
| 1234 | |
| 1235 | DebugInfoListNode* node = debug_info_list_; |
| 1236 | while (node != NULL) { |
| 1237 | BreakLocationIterator it(node->debug_info(), ALL_BREAK_LOCATIONS); |
| 1238 | while (!it.Done()) { |
| 1239 | it.ClearOneShot(); |
| 1240 | it.Next(); |
| 1241 | } |
| 1242 | node = node->next(); |
| 1243 | } |
| 1244 | } |
| 1245 | |
| 1246 | |
| 1247 | void Debug::ActivateStepIn(StackFrame* frame) { |
| 1248 | thread_local_.step_into_fp_ = frame->fp(); |
| 1249 | } |
| 1250 | |
| 1251 | |
| 1252 | void Debug::ClearStepIn() { |
| 1253 | thread_local_.step_into_fp_ = 0; |
| 1254 | } |
| 1255 | |
| 1256 | |
| 1257 | void Debug::ClearStepNext() { |
| 1258 | thread_local_.last_step_action_ = StepNone; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1259 | thread_local_.last_statement_position_ = RelocInfo::kNoPosition; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1260 | thread_local_.last_fp_ = 0; |
| 1261 | } |
| 1262 | |
| 1263 | |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 1264 | bool Debug::EnsureCompiled(Handle<SharedFunctionInfo> shared) { |
| 1265 | if (shared->is_compiled()) return true; |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1266 | return CompileLazyShared(shared, CLEAR_EXCEPTION, 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1267 | } |
| 1268 | |
| 1269 | |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 1270 | // Ensures the debug information is present for shared. |
| 1271 | bool Debug::EnsureDebugInfo(Handle<SharedFunctionInfo> shared) { |
| 1272 | // Return if we already have the debug info for shared. |
| 1273 | if (HasDebugInfo(shared)) return true; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1274 | |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 1275 | // Ensure shared in compiled. Return false if this failed. |
| 1276 | if (!EnsureCompiled(shared)) return false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1277 | |
| 1278 | // Create the debug info object. |
v8.team.kasperl | 727e995 | 2008-09-02 14:56:44 +0000 | [diff] [blame] | 1279 | Handle<DebugInfo> debug_info = Factory::NewDebugInfo(shared); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1280 | |
| 1281 | // Add debug info to the list. |
| 1282 | DebugInfoListNode* node = new DebugInfoListNode(*debug_info); |
| 1283 | node->set_next(debug_info_list_); |
| 1284 | debug_info_list_ = node; |
| 1285 | |
| 1286 | // Now there is at least one break point. |
| 1287 | has_break_points_ = true; |
| 1288 | |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 1289 | return true; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1290 | } |
| 1291 | |
| 1292 | |
| 1293 | void Debug::RemoveDebugInfo(Handle<DebugInfo> debug_info) { |
| 1294 | ASSERT(debug_info_list_ != NULL); |
| 1295 | // Run through the debug info objects to find this one and remove it. |
| 1296 | DebugInfoListNode* prev = NULL; |
| 1297 | DebugInfoListNode* current = debug_info_list_; |
| 1298 | while (current != NULL) { |
| 1299 | if (*current->debug_info() == *debug_info) { |
| 1300 | // Unlink from list. If prev is NULL we are looking at the first element. |
| 1301 | if (prev == NULL) { |
| 1302 | debug_info_list_ = current->next(); |
| 1303 | } else { |
| 1304 | prev->set_next(current->next()); |
| 1305 | } |
| 1306 | current->debug_info()->shared()->set_debug_info(Heap::undefined_value()); |
| 1307 | delete current; |
| 1308 | |
| 1309 | // If there are no more debug info objects there are not more break |
| 1310 | // points. |
| 1311 | has_break_points_ = debug_info_list_ != NULL; |
| 1312 | |
| 1313 | return; |
| 1314 | } |
| 1315 | // Move to next in list. |
| 1316 | prev = current; |
| 1317 | current = current->next(); |
| 1318 | } |
| 1319 | UNREACHABLE(); |
| 1320 | } |
| 1321 | |
| 1322 | |
| 1323 | void Debug::SetAfterBreakTarget(JavaScriptFrame* frame) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1324 | HandleScope scope; |
| 1325 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1326 | // Get the executing function in which the debug break occurred. |
| 1327 | Handle<SharedFunctionInfo> shared = |
| 1328 | Handle<SharedFunctionInfo>(JSFunction::cast(frame->function())->shared()); |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame] | 1329 | if (!EnsureDebugInfo(shared)) { |
| 1330 | // Return if we failed to retrieve the debug info. |
| 1331 | return; |
| 1332 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1333 | Handle<DebugInfo> debug_info = GetDebugInfo(shared); |
| 1334 | Handle<Code> code(debug_info->code()); |
| 1335 | Handle<Code> original_code(debug_info->original_code()); |
| 1336 | #ifdef DEBUG |
| 1337 | // Get the code which is actually executing. |
kasperl@chromium.org | 061ef74 | 2009-02-27 12:16:20 +0000 | [diff] [blame] | 1338 | Handle<Code> frame_code(frame->code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1339 | ASSERT(frame_code.is_identical_to(code)); |
| 1340 | #endif |
| 1341 | |
| 1342 | // Find the call address in the running code. This address holds the call to |
| 1343 | // either a DebugBreakXXX or to the debug break return entry code if the |
| 1344 | // break point is still active after processing the break point. |
| 1345 | Address addr = frame->pc() - Assembler::kTargetAddrToReturnAddrDist; |
| 1346 | |
| 1347 | // Check if the location is at JS exit. |
| 1348 | bool at_js_exit = false; |
| 1349 | RelocIterator it(debug_info->code()); |
| 1350 | while (!it.done()) { |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1351 | if (RelocInfo::IsJSReturn(it.rinfo()->rmode())) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1352 | at_js_exit = it.rinfo()->pc() == addr - 1; |
| 1353 | } |
| 1354 | it.next(); |
| 1355 | } |
| 1356 | |
| 1357 | // Handle the jump to continue execution after break point depending on the |
| 1358 | // break location. |
| 1359 | if (at_js_exit) { |
| 1360 | // First check if the call in the code is still the debug break return |
| 1361 | // entry code. If it is the break point is still active. If not the break |
| 1362 | // point was removed during break point processing. |
| 1363 | if (Assembler::target_address_at(addr) == |
| 1364 | debug_break_return_entry()->entry()) { |
| 1365 | // Break point still active. Jump to the corresponding place in the |
| 1366 | // original code. |
| 1367 | addr += original_code->instruction_start() - code->instruction_start(); |
| 1368 | } |
| 1369 | |
| 1370 | // Move one byte back to where the call instruction was placed. |
| 1371 | thread_local_.after_break_target_ = addr - 1; |
| 1372 | } else { |
| 1373 | // Check if there still is a debug break call at the target address. If the |
| 1374 | // break point has been removed it will have disappeared. If it have |
| 1375 | // disappeared don't try to look in the original code as the running code |
| 1376 | // will have the right address. This takes care of the case where the last |
| 1377 | // break point is removed from the function and therefore no "original code" |
| 1378 | // is available. If the debug break call is still there find the address in |
| 1379 | // the original code. |
| 1380 | if (IsDebugBreak(Assembler::target_address_at(addr))) { |
| 1381 | // If the break point is still there find the call address which was |
| 1382 | // overwritten in the original code by the call to DebugBreakXXX. |
| 1383 | |
| 1384 | // Find the corresponding address in the original code. |
| 1385 | addr += original_code->instruction_start() - code->instruction_start(); |
| 1386 | } |
| 1387 | |
| 1388 | // Install jump to the call address in the original code. This will be the |
| 1389 | // call which was overwritten by the call to DebugBreakXXX. |
| 1390 | thread_local_.after_break_target_ = Assembler::target_address_at(addr); |
| 1391 | } |
| 1392 | } |
| 1393 | |
| 1394 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1395 | bool Debug::IsDebugGlobal(GlobalObject* global) { |
| 1396 | return IsLoaded() && global == Debug::debug_context()->global(); |
| 1397 | } |
| 1398 | |
| 1399 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1400 | void Debug::ClearMirrorCache() { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1401 | HandleScope scope; |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1402 | ASSERT(Top::context() == *Debug::debug_context()); |
| 1403 | |
| 1404 | // Clear the mirror cache. |
| 1405 | Handle<String> function_name = |
| 1406 | Factory::LookupSymbol(CStrVector("ClearMirrorCache")); |
| 1407 | Handle<Object> fun(Top::global()->GetProperty(*function_name)); |
| 1408 | ASSERT(fun->IsJSFunction()); |
| 1409 | bool caught_exception; |
| 1410 | Handle<Object> js_object = Execution::TryCall( |
| 1411 | Handle<JSFunction>::cast(fun), |
| 1412 | Handle<JSObject>(Debug::debug_context()->global()), |
| 1413 | 0, NULL, &caught_exception); |
| 1414 | } |
| 1415 | |
| 1416 | |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 1417 | Mutex* Debugger::debugger_access_ = OS::CreateMutex(); |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1418 | Handle<Object> Debugger::event_listener_ = Handle<Object>(); |
| 1419 | Handle<Object> Debugger::event_listener_data_ = Handle<Object>(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1420 | bool Debugger::compiling_natives_ = false; |
mads.s.ager | cbaa060 | 2008-08-14 13:41:48 +0000 | [diff] [blame] | 1421 | bool Debugger::is_loading_debugger_ = false; |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 1422 | bool Debugger::never_unload_debugger_ = false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1423 | DebugMessageThread* Debugger::message_thread_ = NULL; |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1424 | v8::Debug::MessageHandler Debugger::message_handler_ = NULL; |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 1425 | bool Debugger::message_handler_cleared_ = false; |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1426 | v8::Debug::HostDispatchHandler Debugger::host_dispatch_handler_ = NULL; |
| 1427 | int Debugger::host_dispatch_micros_ = 100 * 1000; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1428 | DebuggerAgent* Debugger::agent_ = NULL; |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1429 | LockingMessageQueue Debugger::command_queue_(kQueueInitialSize); |
| 1430 | LockingMessageQueue Debugger::message_queue_(kQueueInitialSize); |
| 1431 | Semaphore* Debugger::command_received_ = OS::CreateSemaphore(0); |
| 1432 | Semaphore* Debugger::message_received_ = OS::CreateSemaphore(0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1433 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1434 | |
| 1435 | Handle<Object> Debugger::MakeJSObject(Vector<const char> constructor_name, |
| 1436 | int argc, Object*** argv, |
| 1437 | bool* caught_exception) { |
| 1438 | ASSERT(Top::context() == *Debug::debug_context()); |
| 1439 | |
| 1440 | // Create the execution state object. |
| 1441 | Handle<String> constructor_str = Factory::LookupSymbol(constructor_name); |
| 1442 | Handle<Object> constructor(Top::global()->GetProperty(*constructor_str)); |
| 1443 | ASSERT(constructor->IsJSFunction()); |
| 1444 | if (!constructor->IsJSFunction()) { |
| 1445 | *caught_exception = true; |
| 1446 | return Factory::undefined_value(); |
| 1447 | } |
| 1448 | Handle<Object> js_object = Execution::TryCall( |
| 1449 | Handle<JSFunction>::cast(constructor), |
| 1450 | Handle<JSObject>(Debug::debug_context()->global()), argc, argv, |
| 1451 | caught_exception); |
| 1452 | return js_object; |
| 1453 | } |
| 1454 | |
| 1455 | |
| 1456 | Handle<Object> Debugger::MakeExecutionState(bool* caught_exception) { |
| 1457 | // Create the execution state object. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1458 | Handle<Object> break_id = Factory::NewNumberFromInt(Debug::break_id()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1459 | const int argc = 1; |
| 1460 | Object** argv[argc] = { break_id.location() }; |
| 1461 | return MakeJSObject(CStrVector("MakeExecutionState"), |
| 1462 | argc, argv, caught_exception); |
| 1463 | } |
| 1464 | |
| 1465 | |
| 1466 | Handle<Object> Debugger::MakeBreakEvent(Handle<Object> exec_state, |
| 1467 | Handle<Object> break_points_hit, |
| 1468 | bool* caught_exception) { |
| 1469 | // Create the new break event object. |
| 1470 | const int argc = 2; |
| 1471 | Object** argv[argc] = { exec_state.location(), |
| 1472 | break_points_hit.location() }; |
| 1473 | return MakeJSObject(CStrVector("MakeBreakEvent"), |
| 1474 | argc, |
| 1475 | argv, |
| 1476 | caught_exception); |
| 1477 | } |
| 1478 | |
| 1479 | |
| 1480 | Handle<Object> Debugger::MakeExceptionEvent(Handle<Object> exec_state, |
| 1481 | Handle<Object> exception, |
| 1482 | bool uncaught, |
| 1483 | bool* caught_exception) { |
| 1484 | // Create the new exception event object. |
| 1485 | const int argc = 3; |
| 1486 | Object** argv[argc] = { exec_state.location(), |
| 1487 | exception.location(), |
| 1488 | uncaught ? Factory::true_value().location() : |
| 1489 | Factory::false_value().location()}; |
| 1490 | return MakeJSObject(CStrVector("MakeExceptionEvent"), |
| 1491 | argc, argv, caught_exception); |
| 1492 | } |
| 1493 | |
| 1494 | |
| 1495 | Handle<Object> Debugger::MakeNewFunctionEvent(Handle<Object> function, |
| 1496 | bool* caught_exception) { |
| 1497 | // Create the new function event object. |
| 1498 | const int argc = 1; |
| 1499 | Object** argv[argc] = { function.location() }; |
| 1500 | return MakeJSObject(CStrVector("MakeNewFunctionEvent"), |
| 1501 | argc, argv, caught_exception); |
| 1502 | } |
| 1503 | |
| 1504 | |
| 1505 | Handle<Object> Debugger::MakeCompileEvent(Handle<Script> script, |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1506 | bool before, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1507 | bool* caught_exception) { |
| 1508 | // Create the compile event object. |
| 1509 | Handle<Object> exec_state = MakeExecutionState(caught_exception); |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1510 | Handle<Object> script_wrapper = GetScriptWrapper(script); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1511 | const int argc = 3; |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1512 | Object** argv[argc] = { exec_state.location(), |
| 1513 | script_wrapper.location(), |
| 1514 | before ? Factory::true_value().location() : |
| 1515 | Factory::false_value().location() }; |
| 1516 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1517 | return MakeJSObject(CStrVector("MakeCompileEvent"), |
| 1518 | argc, |
| 1519 | argv, |
| 1520 | caught_exception); |
| 1521 | } |
| 1522 | |
| 1523 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1524 | void Debugger::OnException(Handle<Object> exception, bool uncaught) { |
| 1525 | HandleScope scope; |
| 1526 | |
| 1527 | // Bail out based on state or if there is no listener for this event |
| 1528 | if (Debug::InDebugger()) return; |
| 1529 | if (!Debugger::EventActive(v8::Exception)) return; |
| 1530 | |
| 1531 | // Bail out if exception breaks are not active |
| 1532 | if (uncaught) { |
| 1533 | // Uncaught exceptions are reported by either flags. |
| 1534 | if (!(Debug::break_on_uncaught_exception() || |
| 1535 | Debug::break_on_exception())) return; |
| 1536 | } else { |
| 1537 | // Caught exceptions are reported is activated. |
| 1538 | if (!Debug::break_on_exception()) return; |
| 1539 | } |
| 1540 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1541 | // Enter the debugger. |
| 1542 | EnterDebugger debugger; |
| 1543 | if (debugger.FailedToEnter()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1544 | |
| 1545 | // Clear all current stepping setup. |
| 1546 | Debug::ClearStepping(); |
| 1547 | // Create the event data object. |
| 1548 | bool caught_exception = false; |
| 1549 | Handle<Object> exec_state = MakeExecutionState(&caught_exception); |
| 1550 | Handle<Object> event_data; |
| 1551 | if (!caught_exception) { |
| 1552 | event_data = MakeExceptionEvent(exec_state, exception, uncaught, |
| 1553 | &caught_exception); |
| 1554 | } |
| 1555 | // Bail out and don't call debugger if exception. |
| 1556 | if (caught_exception) { |
| 1557 | return; |
| 1558 | } |
| 1559 | |
| 1560 | // Process debug event |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1561 | ProcessDebugEvent(v8::Exception, event_data, false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1562 | // Return to continue execution from where the exception was thrown. |
| 1563 | } |
| 1564 | |
| 1565 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1566 | void Debugger::OnDebugBreak(Handle<Object> break_points_hit, |
| 1567 | bool auto_continue) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1568 | HandleScope scope; |
| 1569 | |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 1570 | // Debugger has already been entered by caller. |
| 1571 | ASSERT(Top::context() == *Debug::debug_context()); |
| 1572 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1573 | // Bail out if there is no listener for this event |
| 1574 | if (!Debugger::EventActive(v8::Break)) return; |
| 1575 | |
| 1576 | // Debugger must be entered in advance. |
| 1577 | ASSERT(Top::context() == *Debug::debug_context()); |
| 1578 | |
| 1579 | // Create the event data object. |
| 1580 | bool caught_exception = false; |
| 1581 | Handle<Object> exec_state = MakeExecutionState(&caught_exception); |
| 1582 | Handle<Object> event_data; |
| 1583 | if (!caught_exception) { |
| 1584 | event_data = MakeBreakEvent(exec_state, break_points_hit, |
| 1585 | &caught_exception); |
| 1586 | } |
| 1587 | // Bail out and don't call debugger if exception. |
| 1588 | if (caught_exception) { |
| 1589 | return; |
| 1590 | } |
| 1591 | |
| 1592 | // Process debug event |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1593 | ProcessDebugEvent(v8::Break, event_data, auto_continue); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1594 | } |
| 1595 | |
| 1596 | |
| 1597 | void Debugger::OnBeforeCompile(Handle<Script> script) { |
| 1598 | HandleScope scope; |
| 1599 | |
| 1600 | // Bail out based on state or if there is no listener for this event |
| 1601 | if (Debug::InDebugger()) return; |
| 1602 | if (compiling_natives()) return; |
| 1603 | if (!EventActive(v8::BeforeCompile)) return; |
| 1604 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1605 | // Enter the debugger. |
| 1606 | EnterDebugger debugger; |
| 1607 | if (debugger.FailedToEnter()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1608 | |
| 1609 | // Create the event data object. |
| 1610 | bool caught_exception = false; |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1611 | Handle<Object> event_data = MakeCompileEvent(script, true, &caught_exception); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1612 | // Bail out and don't call debugger if exception. |
| 1613 | if (caught_exception) { |
| 1614 | return; |
| 1615 | } |
| 1616 | |
| 1617 | // Process debug event |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1618 | ProcessDebugEvent(v8::BeforeCompile, event_data, false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1619 | } |
| 1620 | |
| 1621 | |
| 1622 | // Handle debugger actions when a new script is compiled. |
| 1623 | void Debugger::OnAfterCompile(Handle<Script> script, Handle<JSFunction> fun) { |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 1624 | HandleScope scope; |
| 1625 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1626 | // No compile events while compiling natives. |
| 1627 | if (compiling_natives()) return; |
| 1628 | |
| 1629 | // No more to do if not debugging. |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 1630 | if (!IsDebuggerActive()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1631 | |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1632 | // Store whether in debugger before entering debugger. |
| 1633 | bool in_debugger = Debug::InDebugger(); |
| 1634 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1635 | // Enter the debugger. |
| 1636 | EnterDebugger debugger; |
| 1637 | if (debugger.FailedToEnter()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1638 | |
| 1639 | // If debugging there might be script break points registered for this |
| 1640 | // script. Make sure that these break points are set. |
| 1641 | |
| 1642 | // Get the function UpdateScriptBreakPoints (defined in debug-delay.js). |
| 1643 | Handle<Object> update_script_break_points = |
| 1644 | Handle<Object>(Debug::debug_context()->global()->GetProperty( |
| 1645 | *Factory::LookupAsciiSymbol("UpdateScriptBreakPoints"))); |
| 1646 | if (!update_script_break_points->IsJSFunction()) { |
| 1647 | return; |
| 1648 | } |
| 1649 | ASSERT(update_script_break_points->IsJSFunction()); |
| 1650 | |
| 1651 | // Wrap the script object in a proper JS object before passing it |
| 1652 | // to JavaScript. |
| 1653 | Handle<JSValue> wrapper = GetScriptWrapper(script); |
| 1654 | |
| 1655 | // Call UpdateScriptBreakPoints expect no exceptions. |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 1656 | bool caught_exception = false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1657 | const int argc = 1; |
| 1658 | Object** argv[argc] = { reinterpret_cast<Object**>(wrapper.location()) }; |
| 1659 | Handle<Object> result = Execution::TryCall( |
| 1660 | Handle<JSFunction>::cast(update_script_break_points), |
| 1661 | Top::builtins(), argc, argv, |
| 1662 | &caught_exception); |
| 1663 | if (caught_exception) { |
| 1664 | return; |
| 1665 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1666 | // Bail out based on state or if there is no listener for this event |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1667 | if (in_debugger) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1668 | if (!Debugger::EventActive(v8::AfterCompile)) return; |
| 1669 | |
| 1670 | // Create the compile state object. |
| 1671 | Handle<Object> event_data = MakeCompileEvent(script, |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1672 | false, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1673 | &caught_exception); |
| 1674 | // Bail out and don't call debugger if exception. |
| 1675 | if (caught_exception) { |
| 1676 | return; |
| 1677 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1678 | // Process debug event |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1679 | ProcessDebugEvent(v8::AfterCompile, event_data, false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1680 | } |
| 1681 | |
| 1682 | |
| 1683 | void Debugger::OnNewFunction(Handle<JSFunction> function) { |
| 1684 | return; |
| 1685 | HandleScope scope; |
| 1686 | |
| 1687 | // Bail out based on state or if there is no listener for this event |
| 1688 | if (Debug::InDebugger()) return; |
| 1689 | if (compiling_natives()) return; |
| 1690 | if (!Debugger::EventActive(v8::NewFunction)) return; |
| 1691 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1692 | // Enter the debugger. |
| 1693 | EnterDebugger debugger; |
| 1694 | if (debugger.FailedToEnter()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1695 | |
| 1696 | // Create the event object. |
| 1697 | bool caught_exception = false; |
| 1698 | Handle<Object> event_data = MakeNewFunctionEvent(function, &caught_exception); |
| 1699 | // Bail out and don't call debugger if exception. |
| 1700 | if (caught_exception) { |
| 1701 | return; |
| 1702 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1703 | // Process debug event. |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1704 | ProcessDebugEvent(v8::NewFunction, event_data, false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1705 | } |
| 1706 | |
| 1707 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1708 | void Debugger::ProcessDebugEvent(v8::DebugEvent event, |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1709 | Handle<Object> event_data, |
| 1710 | bool auto_continue) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1711 | HandleScope scope; |
| 1712 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1713 | // Create the execution state. |
| 1714 | bool caught_exception = false; |
| 1715 | Handle<Object> exec_state = MakeExecutionState(&caught_exception); |
| 1716 | if (caught_exception) { |
| 1717 | return; |
| 1718 | } |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1719 | // First notify the message handler if any. |
| 1720 | if (message_handler_ != NULL) { |
| 1721 | NotifyMessageHandler(event, exec_state, event_data, auto_continue); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1722 | } |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1723 | // Notify registered debug event listener. This can be either a C or a |
| 1724 | // JavaScript function. |
| 1725 | if (!event_listener_.is_null()) { |
| 1726 | if (event_listener_->IsProxy()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1727 | // C debug event listener. |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1728 | Handle<Proxy> callback_obj(Handle<Proxy>::cast(event_listener_)); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1729 | v8::Debug::EventCallback callback = |
| 1730 | FUNCTION_CAST<v8::Debug::EventCallback>(callback_obj->proxy()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1731 | callback(event, |
| 1732 | v8::Utils::ToLocal(Handle<JSObject>::cast(exec_state)), |
| 1733 | v8::Utils::ToLocal(Handle<JSObject>::cast(event_data)), |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1734 | v8::Utils::ToLocal(Handle<Object>::cast(event_listener_data_))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1735 | } else { |
| 1736 | // JavaScript debug event listener. |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1737 | ASSERT(event_listener_->IsJSFunction()); |
| 1738 | Handle<JSFunction> fun(Handle<JSFunction>::cast(event_listener_)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1739 | |
| 1740 | // Invoke the JavaScript debug event listener. |
| 1741 | const int argc = 4; |
| 1742 | Object** argv[argc] = { Handle<Object>(Smi::FromInt(event)).location(), |
| 1743 | exec_state.location(), |
| 1744 | event_data.location(), |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1745 | event_listener_data_.location() }; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1746 | Handle<Object> result = Execution::TryCall(fun, Top::global(), |
| 1747 | argc, argv, &caught_exception); |
| 1748 | if (caught_exception) { |
| 1749 | // Silently ignore exceptions from debug event listeners. |
| 1750 | } |
| 1751 | } |
| 1752 | } |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1753 | |
| 1754 | // Clear the mirror cache. |
| 1755 | Debug::ClearMirrorCache(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1756 | } |
| 1757 | |
| 1758 | |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 1759 | void Debugger::UnloadDebugger() { |
| 1760 | // Make sure that there are no breakpoints left. |
| 1761 | Debug::ClearAllBreakPoints(); |
| 1762 | |
| 1763 | // Unload the debugger if feasible. |
| 1764 | if (!never_unload_debugger_) { |
| 1765 | Debug::Unload(); |
| 1766 | } |
| 1767 | |
| 1768 | // Clear the flag indicating that the message handler was recently cleared. |
| 1769 | message_handler_cleared_ = false; |
| 1770 | } |
| 1771 | |
| 1772 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1773 | void Debugger::NotifyMessageHandler(v8::DebugEvent event, |
| 1774 | Handle<Object> exec_state, |
| 1775 | Handle<Object> event_data, |
| 1776 | bool auto_continue) { |
| 1777 | HandleScope scope; |
| 1778 | |
| 1779 | if (!Debug::Load()) return; |
| 1780 | |
| 1781 | // Process the individual events. |
| 1782 | bool interactive = false; |
| 1783 | switch (event) { |
| 1784 | case v8::Break: |
| 1785 | interactive = true; // Break event is always interactive |
| 1786 | break; |
| 1787 | case v8::Exception: |
| 1788 | interactive = true; // Exception event is always interactive |
| 1789 | break; |
| 1790 | case v8::BeforeCompile: |
| 1791 | break; |
| 1792 | case v8::AfterCompile: |
| 1793 | break; |
| 1794 | case v8::NewFunction: |
| 1795 | break; |
| 1796 | default: |
| 1797 | UNREACHABLE(); |
| 1798 | } |
| 1799 | |
| 1800 | // Done if not interactive. |
| 1801 | if (!interactive) return; |
| 1802 | |
| 1803 | // Get the DebugCommandProcessor. |
| 1804 | v8::Local<v8::Object> api_exec_state = |
| 1805 | v8::Utils::ToLocal(Handle<JSObject>::cast(exec_state)); |
| 1806 | v8::Local<v8::String> fun_name = |
| 1807 | v8::String::New("debugCommandProcessor"); |
| 1808 | v8::Local<v8::Function> fun = |
| 1809 | v8::Function::Cast(*api_exec_state->Get(fun_name)); |
| 1810 | v8::TryCatch try_catch; |
| 1811 | v8::Local<v8::Object> cmd_processor = |
| 1812 | v8::Object::Cast(*fun->Call(api_exec_state, 0, NULL)); |
| 1813 | if (try_catch.HasCaught()) { |
| 1814 | PrintLn(try_catch.Exception()); |
| 1815 | return; |
| 1816 | } |
| 1817 | |
| 1818 | // Notify the debugger that a debug event has occurred unless auto continue is |
| 1819 | // active in which case no event is send. |
| 1820 | if (!auto_continue) { |
| 1821 | bool success = SendEventMessage(event_data); |
| 1822 | if (!success) { |
| 1823 | // If failed to notify debugger just continue running. |
| 1824 | return; |
| 1825 | } |
| 1826 | } |
| 1827 | |
| 1828 | // Process requests from the debugger. |
| 1829 | while (true) { |
| 1830 | // Wait for new command in the queue. |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1831 | if (Debugger::host_dispatch_handler_) { |
| 1832 | // In case there is a host dispatch - do periodic dispatches. |
| 1833 | if (!command_received_->Wait(host_dispatch_micros_)) { |
| 1834 | // Timout expired, do the dispatch. |
| 1835 | Debugger::host_dispatch_handler_(); |
| 1836 | continue; |
| 1837 | } |
| 1838 | } else { |
| 1839 | // In case there is no host dispatch - just wait. |
| 1840 | command_received_->Wait(); |
| 1841 | } |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1842 | |
| 1843 | // The debug command interrupt flag might have been set when the command was |
| 1844 | // added. |
| 1845 | StackGuard::Continue(DEBUGCOMMAND); |
| 1846 | |
| 1847 | // Get the command from the queue. |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1848 | Message command = command_queue_.Get(); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1849 | Logger::DebugTag("Got request from command queue, in interactive loop."); |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 1850 | if (!Debugger::IsDebuggerActive()) { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1851 | // Delete command text and user data. |
| 1852 | command.Dispose(); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1853 | return; |
| 1854 | } |
| 1855 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1856 | // Invoke JavaScript to process the debug request. |
| 1857 | v8::Local<v8::String> fun_name; |
| 1858 | v8::Local<v8::Function> fun; |
| 1859 | v8::Local<v8::Value> request; |
| 1860 | v8::TryCatch try_catch; |
| 1861 | fun_name = v8::String::New("processDebugRequest"); |
| 1862 | fun = v8::Function::Cast(*cmd_processor->Get(fun_name)); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1863 | |
| 1864 | request = v8::String::New(command.text().start(), |
| 1865 | command.text().length()); |
| 1866 | command.text().Dispose(); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1867 | static const int kArgc = 1; |
| 1868 | v8::Handle<Value> argv[kArgc] = { request }; |
| 1869 | v8::Local<v8::Value> response_val = fun->Call(cmd_processor, kArgc, argv); |
| 1870 | |
| 1871 | // Get the response. |
| 1872 | v8::Local<v8::String> response; |
| 1873 | bool running = false; |
| 1874 | if (!try_catch.HasCaught()) { |
| 1875 | // Get response string. |
| 1876 | if (!response_val->IsUndefined()) { |
| 1877 | response = v8::String::Cast(*response_val); |
| 1878 | } else { |
| 1879 | response = v8::String::New(""); |
| 1880 | } |
| 1881 | |
| 1882 | // Log the JSON request/response. |
| 1883 | if (FLAG_trace_debug_json) { |
| 1884 | PrintLn(request); |
| 1885 | PrintLn(response); |
| 1886 | } |
| 1887 | |
| 1888 | // Get the running state. |
| 1889 | fun_name = v8::String::New("isRunning"); |
| 1890 | fun = v8::Function::Cast(*cmd_processor->Get(fun_name)); |
| 1891 | static const int kArgc = 1; |
| 1892 | v8::Handle<Value> argv[kArgc] = { response }; |
| 1893 | v8::Local<v8::Value> running_val = fun->Call(cmd_processor, kArgc, argv); |
| 1894 | if (!try_catch.HasCaught()) { |
| 1895 | running = running_val->ToBoolean()->Value(); |
| 1896 | } |
| 1897 | } else { |
| 1898 | // In case of failure the result text is the exception text. |
| 1899 | response = try_catch.Exception()->ToString(); |
| 1900 | } |
| 1901 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1902 | // Return the result. |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1903 | SendMessage(Message::NewOutput(response, command.client_data())); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1904 | |
| 1905 | // Return from debug event processing if either the VM is put into the |
| 1906 | // runnning state (through a continue command) or auto continue is active |
| 1907 | // and there are no more commands queued. |
| 1908 | if (running || (auto_continue && !HasCommands())) { |
| 1909 | return; |
| 1910 | } |
| 1911 | } |
| 1912 | } |
| 1913 | |
| 1914 | |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1915 | void Debugger::SetEventListener(Handle<Object> callback, |
| 1916 | Handle<Object> data) { |
| 1917 | HandleScope scope; |
| 1918 | |
| 1919 | // Clear the global handles for the event listener and the event listener data |
| 1920 | // object. |
| 1921 | if (!event_listener_.is_null()) { |
| 1922 | GlobalHandles::Destroy( |
| 1923 | reinterpret_cast<Object**>(event_listener_.location())); |
| 1924 | event_listener_ = Handle<Object>(); |
| 1925 | } |
| 1926 | if (!event_listener_data_.is_null()) { |
| 1927 | GlobalHandles::Destroy( |
| 1928 | reinterpret_cast<Object**>(event_listener_data_.location())); |
| 1929 | event_listener_data_ = Handle<Object>(); |
| 1930 | } |
| 1931 | |
| 1932 | // If there is a new debug event listener register it together with its data |
| 1933 | // object. |
| 1934 | if (!callback->IsUndefined() && !callback->IsNull()) { |
| 1935 | event_listener_ = Handle<Object>::cast(GlobalHandles::Create(*callback)); |
| 1936 | if (data.is_null()) { |
| 1937 | data = Factory::undefined_value(); |
| 1938 | } |
| 1939 | event_listener_data_ = Handle<Object>::cast(GlobalHandles::Create(*data)); |
| 1940 | } |
| 1941 | |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 1942 | // Unload the debugger if event listener cleared. |
| 1943 | if (callback->IsUndefined()) { |
| 1944 | UnloadDebugger(); |
| 1945 | } |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1946 | } |
| 1947 | |
| 1948 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1949 | void Debugger::SetMessageHandler(v8::Debug::MessageHandler handler, |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1950 | bool message_handler_thread) { |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 1951 | ScopedLock with(debugger_access_); |
| 1952 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1953 | message_handler_ = handler; |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 1954 | if (handler != NULL) { |
| 1955 | if (!message_thread_ && message_handler_thread) { |
| 1956 | message_thread_ = new DebugMessageThread(); |
| 1957 | message_thread_->Start(); |
| 1958 | } |
| 1959 | } else { |
| 1960 | // Indicate that the message handler was recently cleared. |
| 1961 | message_handler_cleared_ = true; |
| 1962 | |
| 1963 | // Send an empty command to the debugger if in a break to make JavaScript |
| 1964 | // run again if the debugger is closed. |
| 1965 | if (Debug::InDebugger()) { |
| 1966 | ProcessCommand(Vector<const uint16_t>::empty()); |
| 1967 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1968 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1969 | } |
| 1970 | |
| 1971 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1972 | void Debugger::SetHostDispatchHandler(v8::Debug::HostDispatchHandler handler, |
| 1973 | int period) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1974 | host_dispatch_handler_ = handler; |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1975 | host_dispatch_micros_ = period * 1000; |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1976 | } |
| 1977 | |
| 1978 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1979 | // Calls the registered debug message handler. This callback is part of the |
| 1980 | // public API. Messages are kept internally as Vector<uint16_t> strings, which |
| 1981 | // are allocated in various places and deallocated by the calling function |
| 1982 | // sometime after this call. |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1983 | void Debugger::InvokeMessageHandler(Message message) { |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 1984 | ScopedLock with(debugger_access_); |
| 1985 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1986 | if (message_handler_ != NULL) { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1987 | message_handler_(message.text().start(), |
| 1988 | message.text().length(), |
| 1989 | message.client_data()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1990 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1991 | message.Dispose(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1992 | } |
| 1993 | |
| 1994 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 1995 | void Debugger::SendMessage(Message message) { |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1996 | if (message_thread_ == NULL) { |
| 1997 | // If there is no message thread just invoke the message handler from the |
| 1998 | // V8 thread. |
| 1999 | InvokeMessageHandler(message); |
| 2000 | } else { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2001 | // Put the message coming from V8 on the queue. The text and user data will |
| 2002 | // be destroyed by the message thread. |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2003 | Logger::DebugTag("Put message on event message_queue."); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2004 | message_queue_.Put(message); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2005 | message_received_->Signal(); |
| 2006 | } |
| 2007 | } |
| 2008 | |
| 2009 | |
| 2010 | bool Debugger::SendEventMessage(Handle<Object> event_data) { |
| 2011 | v8::HandleScope scope; |
| 2012 | // Call toJSONProtocol on the debug event object. |
| 2013 | v8::Local<v8::Object> api_event_data = |
| 2014 | v8::Utils::ToLocal(Handle<JSObject>::cast(event_data)); |
| 2015 | v8::Local<v8::String> fun_name = v8::String::New("toJSONProtocol"); |
| 2016 | v8::Local<v8::Function> fun = |
| 2017 | v8::Function::Cast(*api_event_data->Get(fun_name)); |
| 2018 | v8::TryCatch try_catch; |
| 2019 | v8::Local<v8::Value> json_event = *fun->Call(api_event_data, 0, NULL); |
| 2020 | v8::Local<v8::String> json_event_string; |
| 2021 | if (!try_catch.HasCaught()) { |
| 2022 | if (!json_event->IsUndefined()) { |
| 2023 | json_event_string = json_event->ToString(); |
| 2024 | if (FLAG_trace_debug_json) { |
| 2025 | PrintLn(json_event_string); |
| 2026 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2027 | SendMessage(Message::NewOutput( |
| 2028 | json_event_string, |
| 2029 | NULL /* no user data since there was no request */)); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2030 | } else { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2031 | SendMessage(Message::NewEmptyMessage()); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2032 | } |
| 2033 | } else { |
| 2034 | PrintLn(try_catch.Exception()); |
| 2035 | return false; |
| 2036 | } |
| 2037 | return true; |
| 2038 | } |
| 2039 | |
| 2040 | |
| 2041 | // Puts a command coming from the public API on the queue. Creates |
| 2042 | // a copy of the command string managed by the debugger. Up to this |
| 2043 | // point, the command data was managed by the API client. Called |
| 2044 | // by the API client thread. This is where the API client hands off |
| 2045 | // processing of the command to the DebugMessageThread thread. |
| 2046 | // The new copy of the command is destroyed in HandleCommand(). |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2047 | void Debugger::ProcessCommand(Vector<const uint16_t> command, |
| 2048 | v8::Debug::ClientData* client_data) { |
| 2049 | // Need to cast away const. |
| 2050 | Message message = Message::NewCommand( |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2051 | Vector<uint16_t>(const_cast<uint16_t*>(command.start()), |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2052 | command.length()), |
| 2053 | client_data); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2054 | Logger::DebugTag("Put command on command_queue."); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2055 | command_queue_.Put(message); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2056 | command_received_->Signal(); |
sgjesse@chromium.org | 3afc158 | 2009-04-16 22:31:44 +0000 | [diff] [blame] | 2057 | |
| 2058 | // Set the debug command break flag to have the command processed. |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2059 | if (!Debug::InDebugger()) { |
| 2060 | StackGuard::DebugCommand(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2061 | } |
| 2062 | } |
| 2063 | |
| 2064 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 2065 | bool Debugger::HasCommands() { |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2066 | return !command_queue_.IsEmpty(); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 2067 | } |
| 2068 | |
| 2069 | |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 2070 | bool Debugger::IsDebuggerActive() { |
| 2071 | ScopedLock with(debugger_access_); |
| 2072 | |
| 2073 | return message_handler_ != NULL || !event_listener_.is_null(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2074 | } |
| 2075 | |
| 2076 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 2077 | Handle<Object> Debugger::Call(Handle<JSFunction> fun, |
| 2078 | Handle<Object> data, |
| 2079 | bool* pending_exception) { |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 2080 | // When calling functions in the debugger prevent it from beeing unloaded. |
| 2081 | Debugger::never_unload_debugger_ = true; |
| 2082 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 2083 | // Enter the debugger. |
| 2084 | EnterDebugger debugger; |
| 2085 | if (debugger.FailedToEnter() || !debugger.HasJavaScriptFrames()) { |
| 2086 | return Factory::undefined_value(); |
| 2087 | } |
| 2088 | |
| 2089 | // Create the execution state. |
| 2090 | bool caught_exception = false; |
| 2091 | Handle<Object> exec_state = MakeExecutionState(&caught_exception); |
| 2092 | if (caught_exception) { |
| 2093 | return Factory::undefined_value(); |
| 2094 | } |
| 2095 | |
| 2096 | static const int kArgc = 2; |
| 2097 | Object** argv[kArgc] = { exec_state.location(), data.location() }; |
| 2098 | Handle<Object> result = Execution::Call(fun, Factory::undefined_value(), |
| 2099 | kArgc, argv, pending_exception); |
| 2100 | return result; |
| 2101 | } |
| 2102 | |
| 2103 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 2104 | bool Debugger::StartAgent(const char* name, int port) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2105 | if (Socket::Setup()) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 2106 | agent_ = new DebuggerAgent(name, port); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2107 | agent_->Start(); |
| 2108 | return true; |
| 2109 | } |
| 2110 | |
| 2111 | return false; |
| 2112 | } |
| 2113 | |
| 2114 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 2115 | void Debugger::StopAgent() { |
| 2116 | if (agent_ != NULL) { |
| 2117 | agent_->Shutdown(); |
| 2118 | agent_->Join(); |
| 2119 | delete agent_; |
| 2120 | agent_ = NULL; |
| 2121 | } |
| 2122 | } |
| 2123 | |
| 2124 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2125 | void Debugger::TearDown() { |
| 2126 | if (message_thread_ != NULL) { |
| 2127 | message_thread_->Stop(); |
| 2128 | delete message_thread_; |
| 2129 | message_thread_ = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2130 | } |
| 2131 | } |
| 2132 | |
| 2133 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2134 | void DebugMessageThread::Run() { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2135 | // Sends debug events to an installed debugger message callback. |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2136 | while (keep_running_) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2137 | // Wait and Get are paired so that semaphore count equals queue length. |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2138 | Debugger::message_received_->Wait(); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2139 | Logger::DebugTag("Get message from event message_queue."); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2140 | Message message = Debugger::message_queue_.Get(); |
| 2141 | if (message.text().length() > 0) { |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2142 | Debugger::InvokeMessageHandler(message); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2143 | } else { |
| 2144 | message.Dispose(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2145 | } |
| 2146 | } |
| 2147 | } |
| 2148 | |
| 2149 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2150 | void DebugMessageThread::Stop() { |
| 2151 | keep_running_ = false; |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2152 | Debugger::SendMessage(Message::NewEmptyMessage()); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2153 | Join(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2154 | } |
| 2155 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2156 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2157 | Message::Message() : text_(Vector<uint16_t>::empty()), |
| 2158 | client_data_(NULL) { |
| 2159 | } |
| 2160 | |
| 2161 | |
| 2162 | Message::Message(const Vector<uint16_t>& text, |
| 2163 | v8::Debug::ClientData* data) |
| 2164 | : text_(text), |
| 2165 | client_data_(data) { |
| 2166 | } |
| 2167 | |
| 2168 | |
| 2169 | Message::~Message() { |
| 2170 | } |
| 2171 | |
| 2172 | |
| 2173 | void Message::Dispose() { |
| 2174 | text_.Dispose(); |
| 2175 | delete client_data_; |
| 2176 | client_data_ = NULL; |
| 2177 | } |
| 2178 | |
| 2179 | |
| 2180 | Message Message::NewCommand(const Vector<uint16_t>& command, |
| 2181 | v8::Debug::ClientData* data) { |
| 2182 | return Message(command.Clone(), data); |
| 2183 | } |
| 2184 | |
| 2185 | |
| 2186 | Message Message::NewOutput(v8::Handle<v8::String> output, |
| 2187 | v8::Debug::ClientData* data) { |
| 2188 | Vector<uint16_t> text; |
| 2189 | if (!output.IsEmpty()) { |
| 2190 | // Do not include trailing '\0'. |
| 2191 | text = Vector<uint16_t>::New(output->Length()); |
| 2192 | output->Write(text.start(), 0, output->Length()); |
| 2193 | } |
| 2194 | return Message(text, data); |
| 2195 | } |
| 2196 | |
| 2197 | |
| 2198 | Message Message::NewEmptyMessage() { |
| 2199 | return Message(); |
| 2200 | } |
| 2201 | |
| 2202 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2203 | MessageQueue::MessageQueue(int size) : start_(0), end_(0), size_(size) { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2204 | messages_ = NewArray<Message>(size); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2205 | } |
| 2206 | |
| 2207 | |
| 2208 | MessageQueue::~MessageQueue() { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2209 | while (!IsEmpty()) { |
| 2210 | Message m = Get(); |
| 2211 | m.Dispose(); |
| 2212 | } |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2213 | DeleteArray(messages_); |
| 2214 | } |
| 2215 | |
| 2216 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2217 | Message MessageQueue::Get() { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2218 | ASSERT(!IsEmpty()); |
| 2219 | int result = start_; |
| 2220 | start_ = (start_ + 1) % size_; |
| 2221 | return messages_[result]; |
| 2222 | } |
| 2223 | |
| 2224 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2225 | void MessageQueue::Put(const Message& message) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2226 | if ((end_ + 1) % size_ == start_) { |
| 2227 | Expand(); |
| 2228 | } |
| 2229 | messages_[end_] = message; |
| 2230 | end_ = (end_ + 1) % size_; |
| 2231 | } |
| 2232 | |
| 2233 | |
| 2234 | void MessageQueue::Expand() { |
| 2235 | MessageQueue new_queue(size_ * 2); |
| 2236 | while (!IsEmpty()) { |
| 2237 | new_queue.Put(Get()); |
| 2238 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2239 | Message* array_to_free = messages_; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2240 | *this = new_queue; |
| 2241 | new_queue.messages_ = array_to_free; |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2242 | // Make the new_queue empty so that it doesn't call Dispose on any messages. |
| 2243 | new_queue.start_ = new_queue.end_; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2244 | // Automatic destructor called on new_queue, freeing array_to_free. |
| 2245 | } |
| 2246 | |
| 2247 | |
| 2248 | LockingMessageQueue::LockingMessageQueue(int size) : queue_(size) { |
| 2249 | lock_ = OS::CreateMutex(); |
| 2250 | } |
| 2251 | |
| 2252 | |
| 2253 | LockingMessageQueue::~LockingMessageQueue() { |
| 2254 | delete lock_; |
| 2255 | } |
| 2256 | |
| 2257 | |
| 2258 | bool LockingMessageQueue::IsEmpty() const { |
| 2259 | ScopedLock sl(lock_); |
| 2260 | return queue_.IsEmpty(); |
| 2261 | } |
| 2262 | |
| 2263 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2264 | Message LockingMessageQueue::Get() { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2265 | ScopedLock sl(lock_); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2266 | Message result = queue_.Get(); |
| 2267 | Logger::DebugEvent("Get", result.text()); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2268 | return result; |
| 2269 | } |
| 2270 | |
| 2271 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2272 | void LockingMessageQueue::Put(const Message& message) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2273 | ScopedLock sl(lock_); |
| 2274 | queue_.Put(message); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2275 | Logger::DebugEvent("Put", message.text()); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2276 | } |
| 2277 | |
| 2278 | |
| 2279 | void LockingMessageQueue::Clear() { |
| 2280 | ScopedLock sl(lock_); |
| 2281 | queue_.Clear(); |
| 2282 | } |
| 2283 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame^] | 2284 | #endif // ENABLE_DEBUGGER_SUPPORT |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2285 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2286 | } } // namespace v8::internal |