Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "src/profiler/profile-generator.h" |
| 6 | |
| 7 | #include "src/ast/scopeinfo.h" |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 8 | #include "src/base/adapters.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 9 | #include "src/debug/debug.h" |
| 10 | #include "src/deoptimizer.h" |
| 11 | #include "src/global-handles.h" |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 12 | #include "src/profiler/cpu-profiler.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 13 | #include "src/profiler/profile-generator-inl.h" |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 14 | #include "src/profiler/tick-sample.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 15 | #include "src/unicode.h" |
| 16 | |
| 17 | namespace v8 { |
| 18 | namespace internal { |
| 19 | |
| 20 | |
| 21 | JITLineInfoTable::JITLineInfoTable() {} |
| 22 | |
| 23 | |
| 24 | JITLineInfoTable::~JITLineInfoTable() {} |
| 25 | |
| 26 | |
| 27 | void JITLineInfoTable::SetPosition(int pc_offset, int line) { |
| 28 | DCHECK(pc_offset >= 0); |
| 29 | DCHECK(line > 0); // The 1-based number of the source line. |
| 30 | if (GetSourceLineNumber(pc_offset) != line) { |
| 31 | pc_offset_map_.insert(std::make_pair(pc_offset, line)); |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | |
| 36 | int JITLineInfoTable::GetSourceLineNumber(int pc_offset) const { |
| 37 | PcOffsetMap::const_iterator it = pc_offset_map_.lower_bound(pc_offset); |
| 38 | if (it == pc_offset_map_.end()) { |
| 39 | if (pc_offset_map_.empty()) return v8::CpuProfileNode::kNoLineNumberInfo; |
| 40 | return (--pc_offset_map_.end())->second; |
| 41 | } |
| 42 | return it->second; |
| 43 | } |
| 44 | |
| 45 | |
| 46 | const char* const CodeEntry::kEmptyNamePrefix = ""; |
| 47 | const char* const CodeEntry::kEmptyResourceName = ""; |
| 48 | const char* const CodeEntry::kEmptyBailoutReason = ""; |
| 49 | const char* const CodeEntry::kNoDeoptReason = ""; |
| 50 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 51 | const char* const CodeEntry::kProgramEntryName = "(program)"; |
| 52 | const char* const CodeEntry::kIdleEntryName = "(idle)"; |
| 53 | const char* const CodeEntry::kGarbageCollectorEntryName = "(garbage collector)"; |
| 54 | const char* const CodeEntry::kUnresolvedFunctionName = "(unresolved function)"; |
| 55 | |
| 56 | base::LazyDynamicInstance<CodeEntry, CodeEntry::ProgramEntryCreateTrait>::type |
| 57 | CodeEntry::kProgramEntry = LAZY_DYNAMIC_INSTANCE_INITIALIZER; |
| 58 | |
| 59 | base::LazyDynamicInstance<CodeEntry, CodeEntry::IdleEntryCreateTrait>::type |
| 60 | CodeEntry::kIdleEntry = LAZY_DYNAMIC_INSTANCE_INITIALIZER; |
| 61 | |
| 62 | base::LazyDynamicInstance<CodeEntry, CodeEntry::GCEntryCreateTrait>::type |
| 63 | CodeEntry::kGCEntry = LAZY_DYNAMIC_INSTANCE_INITIALIZER; |
| 64 | |
| 65 | base::LazyDynamicInstance<CodeEntry, |
| 66 | CodeEntry::UnresolvedEntryCreateTrait>::type |
| 67 | CodeEntry::kUnresolvedEntry = LAZY_DYNAMIC_INSTANCE_INITIALIZER; |
| 68 | |
| 69 | CodeEntry* CodeEntry::ProgramEntryCreateTrait::Create() { |
| 70 | return new CodeEntry(Logger::FUNCTION_TAG, CodeEntry::kProgramEntryName); |
| 71 | } |
| 72 | |
| 73 | CodeEntry* CodeEntry::IdleEntryCreateTrait::Create() { |
| 74 | return new CodeEntry(Logger::FUNCTION_TAG, CodeEntry::kIdleEntryName); |
| 75 | } |
| 76 | |
| 77 | CodeEntry* CodeEntry::GCEntryCreateTrait::Create() { |
| 78 | return new CodeEntry(Logger::BUILTIN_TAG, |
| 79 | CodeEntry::kGarbageCollectorEntryName); |
| 80 | } |
| 81 | |
| 82 | CodeEntry* CodeEntry::UnresolvedEntryCreateTrait::Create() { |
| 83 | return new CodeEntry(Logger::FUNCTION_TAG, |
| 84 | CodeEntry::kUnresolvedFunctionName); |
| 85 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 86 | |
| 87 | CodeEntry::~CodeEntry() { |
| 88 | delete line_info_; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 89 | for (auto location : inline_locations_) { |
| 90 | for (auto entry : location.second) { |
| 91 | delete entry; |
| 92 | } |
| 93 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | |
| 97 | uint32_t CodeEntry::GetHash() const { |
| 98 | uint32_t hash = ComputeIntegerHash(tag(), v8::internal::kZeroHashSeed); |
| 99 | if (script_id_ != v8::UnboundScript::kNoScriptId) { |
| 100 | hash ^= ComputeIntegerHash(static_cast<uint32_t>(script_id_), |
| 101 | v8::internal::kZeroHashSeed); |
| 102 | hash ^= ComputeIntegerHash(static_cast<uint32_t>(position_), |
| 103 | v8::internal::kZeroHashSeed); |
| 104 | } else { |
| 105 | hash ^= ComputeIntegerHash( |
| 106 | static_cast<uint32_t>(reinterpret_cast<uintptr_t>(name_prefix_)), |
| 107 | v8::internal::kZeroHashSeed); |
| 108 | hash ^= ComputeIntegerHash( |
| 109 | static_cast<uint32_t>(reinterpret_cast<uintptr_t>(name_)), |
| 110 | v8::internal::kZeroHashSeed); |
| 111 | hash ^= ComputeIntegerHash( |
| 112 | static_cast<uint32_t>(reinterpret_cast<uintptr_t>(resource_name_)), |
| 113 | v8::internal::kZeroHashSeed); |
| 114 | hash ^= ComputeIntegerHash(line_number_, v8::internal::kZeroHashSeed); |
| 115 | } |
| 116 | return hash; |
| 117 | } |
| 118 | |
| 119 | |
| 120 | bool CodeEntry::IsSameFunctionAs(CodeEntry* entry) const { |
| 121 | if (this == entry) return true; |
| 122 | if (script_id_ != v8::UnboundScript::kNoScriptId) { |
| 123 | return script_id_ == entry->script_id_ && position_ == entry->position_; |
| 124 | } |
| 125 | return name_prefix_ == entry->name_prefix_ && name_ == entry->name_ && |
| 126 | resource_name_ == entry->resource_name_ && |
| 127 | line_number_ == entry->line_number_; |
| 128 | } |
| 129 | |
| 130 | |
| 131 | void CodeEntry::SetBuiltinId(Builtins::Name id) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 132 | bit_field_ = TagField::update(bit_field_, CodeEventListener::BUILTIN_TAG); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 133 | bit_field_ = BuiltinIdField::update(bit_field_, id); |
| 134 | } |
| 135 | |
| 136 | |
| 137 | int CodeEntry::GetSourceLine(int pc_offset) const { |
| 138 | if (line_info_ && !line_info_->empty()) { |
| 139 | return line_info_->GetSourceLineNumber(pc_offset); |
| 140 | } |
| 141 | return v8::CpuProfileNode::kNoLineNumberInfo; |
| 142 | } |
| 143 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 144 | void CodeEntry::AddInlineStack(int pc_offset, |
| 145 | std::vector<CodeEntry*>& inline_stack) { |
| 146 | // It's better to use std::move to place the vector into the map, |
| 147 | // but it's not supported by the current stdlibc++ on MacOS. |
| 148 | inline_locations_.insert(std::make_pair(pc_offset, std::vector<CodeEntry*>())) |
| 149 | .first->second.swap(inline_stack); |
| 150 | } |
| 151 | |
| 152 | const std::vector<CodeEntry*>* CodeEntry::GetInlineStack(int pc_offset) const { |
| 153 | auto it = inline_locations_.find(pc_offset); |
| 154 | return it != inline_locations_.end() ? &it->second : NULL; |
| 155 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 156 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 157 | void CodeEntry::AddDeoptInlinedFrames( |
| 158 | int deopt_id, std::vector<DeoptInlinedFrame>& inlined_frames) { |
| 159 | // It's better to use std::move to place the vector into the map, |
| 160 | // but it's not supported by the current stdlibc++ on MacOS. |
| 161 | deopt_inlined_frames_ |
| 162 | .insert(std::make_pair(deopt_id, std::vector<DeoptInlinedFrame>())) |
| 163 | .first->second.swap(inlined_frames); |
| 164 | } |
| 165 | |
| 166 | bool CodeEntry::HasDeoptInlinedFramesFor(int deopt_id) const { |
| 167 | return deopt_inlined_frames_.find(deopt_id) != deopt_inlined_frames_.end(); |
| 168 | } |
| 169 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 170 | void CodeEntry::FillFunctionInfo(SharedFunctionInfo* shared) { |
| 171 | if (!shared->script()->IsScript()) return; |
| 172 | Script* script = Script::cast(shared->script()); |
| 173 | set_script_id(script->id()); |
| 174 | set_position(shared->start_position()); |
| 175 | set_bailout_reason(GetBailoutReason(shared->disable_optimization_reason())); |
| 176 | } |
| 177 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 178 | CpuProfileDeoptInfo CodeEntry::GetDeoptInfo() { |
| 179 | DCHECK(has_deopt_info()); |
| 180 | |
| 181 | CpuProfileDeoptInfo info; |
| 182 | info.deopt_reason = deopt_reason_; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 183 | DCHECK_NE(Deoptimizer::DeoptInfo::kNoDeoptId, deopt_id_); |
| 184 | if (deopt_inlined_frames_.find(deopt_id_) == deopt_inlined_frames_.end()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 185 | info.stack.push_back(CpuProfileDeoptFrame( |
| 186 | {script_id_, position_ + deopt_position_.position()})); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 187 | } else { |
| 188 | size_t deopt_position = deopt_position_.raw(); |
| 189 | // Copy stack of inlined frames where the deopt happened. |
| 190 | std::vector<DeoptInlinedFrame>& frames = deopt_inlined_frames_[deopt_id_]; |
| 191 | for (DeoptInlinedFrame& inlined_frame : base::Reversed(frames)) { |
| 192 | info.stack.push_back(CpuProfileDeoptFrame( |
| 193 | {inlined_frame.script_id, deopt_position + inlined_frame.position})); |
| 194 | deopt_position = 0; // Done with innermost frame. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 195 | } |
| 196 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 197 | return info; |
| 198 | } |
| 199 | |
| 200 | |
| 201 | void ProfileNode::CollectDeoptInfo(CodeEntry* entry) { |
| 202 | deopt_infos_.push_back(entry->GetDeoptInfo()); |
| 203 | entry->clear_deopt_info(); |
| 204 | } |
| 205 | |
| 206 | |
| 207 | ProfileNode* ProfileNode::FindChild(CodeEntry* entry) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 208 | base::HashMap::Entry* map_entry = |
| 209 | children_.Lookup(entry, CodeEntryHash(entry)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 210 | return map_entry != NULL ? |
| 211 | reinterpret_cast<ProfileNode*>(map_entry->value) : NULL; |
| 212 | } |
| 213 | |
| 214 | |
| 215 | ProfileNode* ProfileNode::FindOrAddChild(CodeEntry* entry) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 216 | base::HashMap::Entry* map_entry = |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 217 | children_.LookupOrInsert(entry, CodeEntryHash(entry)); |
| 218 | ProfileNode* node = reinterpret_cast<ProfileNode*>(map_entry->value); |
| 219 | if (node == NULL) { |
| 220 | // New node added. |
| 221 | node = new ProfileNode(tree_, entry); |
| 222 | map_entry->value = node; |
| 223 | children_list_.Add(node); |
| 224 | } |
| 225 | return node; |
| 226 | } |
| 227 | |
| 228 | |
| 229 | void ProfileNode::IncrementLineTicks(int src_line) { |
| 230 | if (src_line == v8::CpuProfileNode::kNoLineNumberInfo) return; |
| 231 | // Increment a hit counter of a certain source line. |
| 232 | // Add a new source line if not found. |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 233 | base::HashMap::Entry* e = |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 234 | line_ticks_.LookupOrInsert(reinterpret_cast<void*>(src_line), src_line); |
| 235 | DCHECK(e); |
| 236 | e->value = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(e->value) + 1); |
| 237 | } |
| 238 | |
| 239 | |
| 240 | bool ProfileNode::GetLineTicks(v8::CpuProfileNode::LineTick* entries, |
| 241 | unsigned int length) const { |
| 242 | if (entries == NULL || length == 0) return false; |
| 243 | |
| 244 | unsigned line_count = line_ticks_.occupancy(); |
| 245 | |
| 246 | if (line_count == 0) return true; |
| 247 | if (length < line_count) return false; |
| 248 | |
| 249 | v8::CpuProfileNode::LineTick* entry = entries; |
| 250 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 251 | for (base::HashMap::Entry *p = line_ticks_.Start(); p != NULL; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 252 | p = line_ticks_.Next(p), entry++) { |
| 253 | entry->line = |
| 254 | static_cast<unsigned int>(reinterpret_cast<uintptr_t>(p->key)); |
| 255 | entry->hit_count = |
| 256 | static_cast<unsigned int>(reinterpret_cast<uintptr_t>(p->value)); |
| 257 | } |
| 258 | |
| 259 | return true; |
| 260 | } |
| 261 | |
| 262 | |
| 263 | void ProfileNode::Print(int indent) { |
| 264 | base::OS::Print("%5u %*s %s%s %d #%d", self_ticks_, indent, "", |
| 265 | entry_->name_prefix(), entry_->name(), entry_->script_id(), |
| 266 | id()); |
| 267 | if (entry_->resource_name()[0] != '\0') |
| 268 | base::OS::Print(" %s:%d", entry_->resource_name(), entry_->line_number()); |
| 269 | base::OS::Print("\n"); |
| 270 | for (size_t i = 0; i < deopt_infos_.size(); ++i) { |
| 271 | CpuProfileDeoptInfo& info = deopt_infos_[i]; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 272 | base::OS::Print("%*s;;; deopted at script_id: %d position: %" PRIuS |
| 273 | " with reason '%s'.\n", |
| 274 | indent + 10, "", info.stack[0].script_id, |
| 275 | info.stack[0].position, info.deopt_reason); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 276 | for (size_t index = 1; index < info.stack.size(); ++index) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 277 | base::OS::Print("%*s;;; Inline point: script_id %d position: %" PRIuS |
| 278 | ".\n", |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 279 | indent + 10, "", info.stack[index].script_id, |
| 280 | info.stack[index].position); |
| 281 | } |
| 282 | } |
| 283 | const char* bailout_reason = entry_->bailout_reason(); |
| 284 | if (bailout_reason != GetBailoutReason(BailoutReason::kNoReason) && |
| 285 | bailout_reason != CodeEntry::kEmptyBailoutReason) { |
| 286 | base::OS::Print("%*s bailed out due to '%s'\n", indent + 10, "", |
| 287 | bailout_reason); |
| 288 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 289 | for (base::HashMap::Entry* p = children_.Start(); p != NULL; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 290 | p = children_.Next(p)) { |
| 291 | reinterpret_cast<ProfileNode*>(p->value)->Print(indent + 2); |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | |
| 296 | class DeleteNodesCallback { |
| 297 | public: |
| 298 | void BeforeTraversingChild(ProfileNode*, ProfileNode*) { } |
| 299 | |
| 300 | void AfterAllChildrenTraversed(ProfileNode* node) { |
| 301 | delete node; |
| 302 | } |
| 303 | |
| 304 | void AfterChildTraversed(ProfileNode*, ProfileNode*) { } |
| 305 | }; |
| 306 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 307 | ProfileTree::ProfileTree(Isolate* isolate) |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 308 | : root_entry_(CodeEventListener::FUNCTION_TAG, "(root)"), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 309 | next_node_id_(1), |
| 310 | root_(new ProfileNode(this, &root_entry_)), |
| 311 | isolate_(isolate), |
| 312 | next_function_id_(1), |
| 313 | function_ids_(ProfileNode::CodeEntriesMatch) {} |
| 314 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 315 | ProfileTree::~ProfileTree() { |
| 316 | DeleteNodesCallback cb; |
| 317 | TraverseDepthFirst(&cb); |
| 318 | } |
| 319 | |
| 320 | |
| 321 | unsigned ProfileTree::GetFunctionId(const ProfileNode* node) { |
| 322 | CodeEntry* code_entry = node->entry(); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 323 | base::HashMap::Entry* entry = |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 324 | function_ids_.LookupOrInsert(code_entry, code_entry->GetHash()); |
| 325 | if (!entry->value) { |
| 326 | entry->value = reinterpret_cast<void*>(next_function_id_++); |
| 327 | } |
| 328 | return static_cast<unsigned>(reinterpret_cast<uintptr_t>(entry->value)); |
| 329 | } |
| 330 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 331 | ProfileNode* ProfileTree::AddPathFromEnd(const std::vector<CodeEntry*>& path, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 332 | int src_line, bool update_stats) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 333 | ProfileNode* node = root_; |
| 334 | CodeEntry* last_entry = NULL; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 335 | for (auto it = path.rbegin(); it != path.rend(); ++it) { |
| 336 | if (*it == NULL) continue; |
| 337 | last_entry = *it; |
| 338 | node = node->FindOrAddChild(*it); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 339 | } |
| 340 | if (last_entry && last_entry->has_deopt_info()) { |
| 341 | node->CollectDeoptInfo(last_entry); |
| 342 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 343 | if (update_stats) { |
| 344 | node->IncrementSelfTicks(); |
| 345 | if (src_line != v8::CpuProfileNode::kNoLineNumberInfo) { |
| 346 | node->IncrementLineTicks(src_line); |
| 347 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 348 | } |
| 349 | return node; |
| 350 | } |
| 351 | |
| 352 | |
| 353 | struct NodesPair { |
| 354 | NodesPair(ProfileNode* src, ProfileNode* dst) |
| 355 | : src(src), dst(dst) { } |
| 356 | ProfileNode* src; |
| 357 | ProfileNode* dst; |
| 358 | }; |
| 359 | |
| 360 | |
| 361 | class Position { |
| 362 | public: |
| 363 | explicit Position(ProfileNode* node) |
| 364 | : node(node), child_idx_(0) { } |
| 365 | INLINE(ProfileNode* current_child()) { |
| 366 | return node->children()->at(child_idx_); |
| 367 | } |
| 368 | INLINE(bool has_current_child()) { |
| 369 | return child_idx_ < node->children()->length(); |
| 370 | } |
| 371 | INLINE(void next_child()) { ++child_idx_; } |
| 372 | |
| 373 | ProfileNode* node; |
| 374 | private: |
| 375 | int child_idx_; |
| 376 | }; |
| 377 | |
| 378 | |
| 379 | // Non-recursive implementation of a depth-first post-order tree traversal. |
| 380 | template <typename Callback> |
| 381 | void ProfileTree::TraverseDepthFirst(Callback* callback) { |
| 382 | List<Position> stack(10); |
| 383 | stack.Add(Position(root_)); |
| 384 | while (stack.length() > 0) { |
| 385 | Position& current = stack.last(); |
| 386 | if (current.has_current_child()) { |
| 387 | callback->BeforeTraversingChild(current.node, current.current_child()); |
| 388 | stack.Add(Position(current.current_child())); |
| 389 | } else { |
| 390 | callback->AfterAllChildrenTraversed(current.node); |
| 391 | if (stack.length() > 1) { |
| 392 | Position& parent = stack[stack.length() - 2]; |
| 393 | callback->AfterChildTraversed(parent.node, current.node); |
| 394 | parent.next_child(); |
| 395 | } |
| 396 | // Remove child from the stack. |
| 397 | stack.RemoveLast(); |
| 398 | } |
| 399 | } |
| 400 | } |
| 401 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 402 | CpuProfile::CpuProfile(CpuProfiler* profiler, const char* title, |
| 403 | bool record_samples) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 404 | : title_(title), |
| 405 | record_samples_(record_samples), |
| 406 | start_time_(base::TimeTicks::HighResolutionNow()), |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 407 | top_down_(profiler->isolate()), |
| 408 | profiler_(profiler) {} |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 409 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 410 | void CpuProfile::AddPath(base::TimeTicks timestamp, |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 411 | const std::vector<CodeEntry*>& path, int src_line, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 412 | bool update_stats) { |
| 413 | ProfileNode* top_frame_node = |
| 414 | top_down_.AddPathFromEnd(path, src_line, update_stats); |
| 415 | if (record_samples_ && !timestamp.IsNull()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 416 | timestamps_.Add(timestamp); |
| 417 | samples_.Add(top_frame_node); |
| 418 | } |
| 419 | } |
| 420 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 421 | void CpuProfile::CalculateTotalTicksAndSamplingRate() { |
| 422 | end_time_ = base::TimeTicks::HighResolutionNow(); |
| 423 | } |
| 424 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 425 | void CpuProfile::Print() { |
| 426 | base::OS::Print("[Top down]:\n"); |
| 427 | top_down_.Print(); |
| 428 | } |
| 429 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 430 | void CodeMap::AddCode(Address addr, CodeEntry* entry, unsigned size) { |
| 431 | DeleteAllCoveredCode(addr, addr + size); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 432 | code_map_.insert({addr, CodeEntryInfo(entry, size)}); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 433 | } |
| 434 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 435 | void CodeMap::DeleteAllCoveredCode(Address start, Address end) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 436 | auto left = code_map_.upper_bound(start); |
| 437 | if (left != code_map_.begin()) { |
| 438 | --left; |
| 439 | if (left->first + left->second.size <= start) ++left; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 440 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 441 | auto right = left; |
| 442 | while (right != code_map_.end() && right->first < end) ++right; |
| 443 | code_map_.erase(left, right); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 444 | } |
| 445 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 446 | CodeEntry* CodeMap::FindEntry(Address addr) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 447 | auto it = code_map_.upper_bound(addr); |
| 448 | if (it == code_map_.begin()) return nullptr; |
| 449 | --it; |
| 450 | Address end_address = it->first + it->second.size; |
| 451 | return addr < end_address ? it->second.entry : nullptr; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 452 | } |
| 453 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 454 | void CodeMap::MoveCode(Address from, Address to) { |
| 455 | if (from == to) return; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 456 | auto it = code_map_.find(from); |
| 457 | if (it == code_map_.end()) return; |
| 458 | CodeEntryInfo info = it->second; |
| 459 | code_map_.erase(it); |
| 460 | AddCode(to, info.entry, info.size); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 461 | } |
| 462 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 463 | void CodeMap::Print() { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 464 | for (auto it = code_map_.begin(); it != code_map_.end(); ++it) { |
| 465 | base::OS::Print("%p %5d %s\n", static_cast<void*>(it->first), |
| 466 | it->second.size, it->second.entry->name()); |
| 467 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 468 | } |
| 469 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 470 | CpuProfilesCollection::CpuProfilesCollection(Isolate* isolate) |
| 471 | : resource_names_(isolate->heap()), |
| 472 | profiler_(nullptr), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 473 | current_profiles_semaphore_(1) {} |
| 474 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 475 | static void DeleteCpuProfile(CpuProfile** profile_ptr) { |
| 476 | delete *profile_ptr; |
| 477 | } |
| 478 | |
| 479 | |
| 480 | CpuProfilesCollection::~CpuProfilesCollection() { |
| 481 | finished_profiles_.Iterate(DeleteCpuProfile); |
| 482 | current_profiles_.Iterate(DeleteCpuProfile); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 483 | } |
| 484 | |
| 485 | |
| 486 | bool CpuProfilesCollection::StartProfiling(const char* title, |
| 487 | bool record_samples) { |
| 488 | current_profiles_semaphore_.Wait(); |
| 489 | if (current_profiles_.length() >= kMaxSimultaneousProfiles) { |
| 490 | current_profiles_semaphore_.Signal(); |
| 491 | return false; |
| 492 | } |
| 493 | for (int i = 0; i < current_profiles_.length(); ++i) { |
| 494 | if (strcmp(current_profiles_[i]->title(), title) == 0) { |
| 495 | // Ignore attempts to start profile with the same title... |
| 496 | current_profiles_semaphore_.Signal(); |
| 497 | // ... though return true to force it collect a sample. |
| 498 | return true; |
| 499 | } |
| 500 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 501 | current_profiles_.Add(new CpuProfile(profiler_, title, record_samples)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 502 | current_profiles_semaphore_.Signal(); |
| 503 | return true; |
| 504 | } |
| 505 | |
| 506 | |
| 507 | CpuProfile* CpuProfilesCollection::StopProfiling(const char* title) { |
| 508 | const int title_len = StrLength(title); |
| 509 | CpuProfile* profile = NULL; |
| 510 | current_profiles_semaphore_.Wait(); |
| 511 | for (int i = current_profiles_.length() - 1; i >= 0; --i) { |
| 512 | if (title_len == 0 || strcmp(current_profiles_[i]->title(), title) == 0) { |
| 513 | profile = current_profiles_.Remove(i); |
| 514 | break; |
| 515 | } |
| 516 | } |
| 517 | current_profiles_semaphore_.Signal(); |
| 518 | |
| 519 | if (profile == NULL) return NULL; |
| 520 | profile->CalculateTotalTicksAndSamplingRate(); |
| 521 | finished_profiles_.Add(profile); |
| 522 | return profile; |
| 523 | } |
| 524 | |
| 525 | |
| 526 | bool CpuProfilesCollection::IsLastProfile(const char* title) { |
| 527 | // Called from VM thread, and only it can mutate the list, |
| 528 | // so no locking is needed here. |
| 529 | if (current_profiles_.length() != 1) return false; |
| 530 | return StrLength(title) == 0 |
| 531 | || strcmp(current_profiles_[0]->title(), title) == 0; |
| 532 | } |
| 533 | |
| 534 | |
| 535 | void CpuProfilesCollection::RemoveProfile(CpuProfile* profile) { |
| 536 | // Called from VM thread for a completed profile. |
| 537 | for (int i = 0; i < finished_profiles_.length(); i++) { |
| 538 | if (profile == finished_profiles_[i]) { |
| 539 | finished_profiles_.Remove(i); |
| 540 | return; |
| 541 | } |
| 542 | } |
| 543 | UNREACHABLE(); |
| 544 | } |
| 545 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 546 | void CpuProfilesCollection::AddPathToCurrentProfiles( |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 547 | base::TimeTicks timestamp, const std::vector<CodeEntry*>& path, |
| 548 | int src_line, bool update_stats) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 549 | // As starting / stopping profiles is rare relatively to this |
| 550 | // method, we don't bother minimizing the duration of lock holding, |
| 551 | // e.g. copying contents of the list to a local vector. |
| 552 | current_profiles_semaphore_.Wait(); |
| 553 | for (int i = 0; i < current_profiles_.length(); ++i) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 554 | current_profiles_[i]->AddPath(timestamp, path, src_line, update_stats); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 555 | } |
| 556 | current_profiles_semaphore_.Signal(); |
| 557 | } |
| 558 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 559 | ProfileGenerator::ProfileGenerator(CpuProfilesCollection* profiles) |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 560 | : profiles_(profiles) {} |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 561 | |
| 562 | void ProfileGenerator::RecordTickSample(const TickSample& sample) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 563 | std::vector<CodeEntry*> entries; |
| 564 | // Conservatively reserve space for stack frames + pc + function + vm-state. |
| 565 | // There could in fact be more of them because of inlined entries. |
| 566 | entries.reserve(sample.frames_count + 3); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 567 | |
| 568 | // The ProfileNode knows nothing about all versions of generated code for |
| 569 | // the same JS function. The line number information associated with |
| 570 | // the latest version of generated code is used to find a source line number |
| 571 | // for a JS function. Then, the detected source line is passed to |
| 572 | // ProfileNode to increase the tick count for this source line. |
| 573 | int src_line = v8::CpuProfileNode::kNoLineNumberInfo; |
| 574 | bool src_line_not_found = true; |
| 575 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 576 | if (sample.pc != nullptr) { |
| 577 | if (sample.has_external_callback && sample.state == EXTERNAL) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 578 | // Don't use PC when in external callback code, as it can point |
| 579 | // inside callback's code, and we will erroneously report |
| 580 | // that a callback calls itself. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 581 | entries.push_back(code_map_.FindEntry(sample.external_callback_entry)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 582 | } else { |
| 583 | CodeEntry* pc_entry = code_map_.FindEntry(sample.pc); |
| 584 | // If there is no pc_entry we're likely in native code. |
| 585 | // Find out, if top of stack was pointing inside a JS function |
| 586 | // meaning that we have encountered a frameless invocation. |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 587 | if (!pc_entry && !sample.has_external_callback) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 588 | pc_entry = code_map_.FindEntry(sample.tos); |
| 589 | } |
| 590 | // If pc is in the function code before it set up stack frame or after the |
| 591 | // frame was destroyed SafeStackFrameIterator incorrectly thinks that |
| 592 | // ebp contains return address of the current function and skips caller's |
| 593 | // frame. Check for this case and just skip such samples. |
| 594 | if (pc_entry) { |
| 595 | int pc_offset = |
| 596 | static_cast<int>(sample.pc - pc_entry->instruction_start()); |
| 597 | src_line = pc_entry->GetSourceLine(pc_offset); |
| 598 | if (src_line == v8::CpuProfileNode::kNoLineNumberInfo) { |
| 599 | src_line = pc_entry->line_number(); |
| 600 | } |
| 601 | src_line_not_found = false; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 602 | entries.push_back(pc_entry); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 603 | |
| 604 | if (pc_entry->builtin_id() == Builtins::kFunctionPrototypeApply || |
| 605 | pc_entry->builtin_id() == Builtins::kFunctionPrototypeCall) { |
| 606 | // When current function is either the Function.prototype.apply or the |
| 607 | // Function.prototype.call builtin the top frame is either frame of |
| 608 | // the calling JS function or internal frame. |
| 609 | // In the latter case we know the caller for sure but in the |
| 610 | // former case we don't so we simply replace the frame with |
| 611 | // 'unresolved' entry. |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 612 | if (!sample.has_external_callback) { |
| 613 | entries.push_back(CodeEntry::unresolved_entry()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 614 | } |
| 615 | } |
| 616 | } |
| 617 | } |
| 618 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 619 | for (const Address *stack_pos = sample.stack, |
| 620 | *stack_end = stack_pos + sample.frames_count; |
| 621 | stack_pos != stack_end; ++stack_pos) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 622 | CodeEntry* entry = code_map_.FindEntry(*stack_pos); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 623 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 624 | if (entry) { |
| 625 | // Find out if the entry has an inlining stack associated. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 626 | int pc_offset = |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 627 | static_cast<int>(*stack_pos - entry->instruction_start()); |
| 628 | const std::vector<CodeEntry*>* inline_stack = |
| 629 | entry->GetInlineStack(pc_offset); |
| 630 | if (inline_stack) { |
| 631 | entries.insert(entries.end(), inline_stack->rbegin(), |
| 632 | inline_stack->rend()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 633 | } |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 634 | // Skip unresolved frames (e.g. internal frame) and get source line of |
| 635 | // the first JS caller. |
| 636 | if (src_line_not_found) { |
| 637 | src_line = entry->GetSourceLine(pc_offset); |
| 638 | if (src_line == v8::CpuProfileNode::kNoLineNumberInfo) { |
| 639 | src_line = entry->line_number(); |
| 640 | } |
| 641 | src_line_not_found = false; |
| 642 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 643 | } |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 644 | entries.push_back(entry); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 645 | } |
| 646 | } |
| 647 | |
| 648 | if (FLAG_prof_browser_mode) { |
| 649 | bool no_symbolized_entries = true; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 650 | for (auto e : entries) { |
| 651 | if (e != NULL) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 652 | no_symbolized_entries = false; |
| 653 | break; |
| 654 | } |
| 655 | } |
| 656 | // If no frames were symbolized, put the VM state entry in. |
| 657 | if (no_symbolized_entries) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 658 | entries.push_back(EntryForVMState(sample.state)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 659 | } |
| 660 | } |
| 661 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 662 | profiles_->AddPathToCurrentProfiles(sample.timestamp, entries, src_line, |
| 663 | sample.update_stats); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 664 | } |
| 665 | |
| 666 | |
| 667 | CodeEntry* ProfileGenerator::EntryForVMState(StateTag tag) { |
| 668 | switch (tag) { |
| 669 | case GC: |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 670 | return CodeEntry::gc_entry(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 671 | case JS: |
| 672 | case COMPILER: |
| 673 | // DOM events handlers are reported as OTHER / EXTERNAL entries. |
| 674 | // To avoid confusing people, let's put all these entries into |
| 675 | // one bucket. |
| 676 | case OTHER: |
| 677 | case EXTERNAL: |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 678 | return CodeEntry::program_entry(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 679 | case IDLE: |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 680 | return CodeEntry::idle_entry(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 681 | default: return NULL; |
| 682 | } |
| 683 | } |
| 684 | |
| 685 | } // namespace internal |
| 686 | } // namespace v8 |