deps: V8: backport 14 CPU profiler commits from upstream

[cpu-profiler] Fix bugs and add tests for JITLineInfoTable
https://chromium.googlesource.com/v8/v8/+/4feb5ce7fd5ef8c933f3f5dff2eca1173f85c1e9

[cpu-profiler] Fix incorrect line number calculation.
https://chromium.googlesource.com/v8/v8/+/ddb2856f39632f9e9f623d3cdb4600e636172031

[cpu-profiler] Use std::unordered_map for hashmaps.
https://chromium.googlesource.com/v8/v8/+/35985ce6abc80b85264fe3b87b246fed5f1806e6

[cpu-profiler] Do not store CodeEntries between profiling sessions.
https://chromium.googlesource.com/v8/v8.git/+/8ec48b2117b8092c4956f1ee11a0c85bec3ba1f8

[cpu-profiler] Remove name_prefix field from CodeEntry
https://chromium.googlesource.com/v8/v8.git/+/6f72af25fe43218b60c68129073ddcddb631566e

[cpu-profiler] Extract rare used fields of CodeEntry to an optional object.
https://chromium.googlesource.com/v8/v8.git/+/fcc1ebb55aab38013855834f556f6e874e0eb8b3

[profiler] Refactoring: decouple StringsStorage from Heap object.
https://chromium.googlesource.com/v8/v8/+/a31320f59c911a277566d6c2fa0b0f2ac83e0748

[cpu-profiler] Add a HandleScope to limit memory consumption.
https://chromium.googlesource.com/v8/v8.git/+/3e9f8a4f635e2d946651d6a4df81378266f32dc9

[cpu-profiler] Lazily create CPU profiler.
https://chromium.googlesource.com/v8/v8/+/1426ea1d6d45be0b4d9476bdb5bf3f27cfe578a0

[cpu-profiler] turn several std::map's into unordered_map's.
https://chromium.googlesource.com/v8/v8/+/3ed5dfb8a3cbc7aa0017bd01c2fdd6227485b8ad

[cpu-profiler] Eagerly delete not used CodeEntry'es
https://chromium.googlesource.com/v8/v8.git/+/c6c28f7a412a88df12055e953630a9e93cc64d49

[cpu-profiler] Move bailout reason into rare_info struct
https://chromium.googlesource.com/v8/v8.git/+/29ea4d1ef5360e71c61ecf8db6a5a0a0c3391fd1

[cpu-profiler] Save space in the SourcePositionTable by using a vector.
https://chromium.googlesource.com/v8/v8.git/+/1cb19f0e0a93adbac8c11bc906f951bd8098722d

[cpu-profiler] Only store deopt inline frames for functions that need it
https://chromium.googlesource.com/v8/v8.git/+/0bfcbdd4726920755e51dab28c18ab93e050819b

PR-URL: #21558
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>

deps/v8/include/v8-version.h

@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 6
 #define V8_MINOR_VERSION 2
 #define V8_BUILD_NUMBER 414
-#define V8_PATCH_LEVEL 60
+#define V8_PATCH_LEVEL 61
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)

deps/v8/src/api.cc

@@ -8419,7 +8419,7 @@ HeapProfiler* Isolate::GetHeapProfiler() {
 
 CpuProfiler* Isolate::GetCpuProfiler() {
   i::CpuProfiler* cpu_profiler =
-      reinterpret_cast<i::Isolate*>(this)->cpu_profiler();
+      reinterpret_cast<i::Isolate*>(this)->EnsureCpuProfiler();
   return reinterpret_cast<CpuProfiler*>(cpu_profiler);
 }
 
@@ -10139,15 +10139,7 @@ Local<String> CpuProfileNode::GetFunctionName() const {
   const i::CodeEntry* entry = node->entry();
   i::Handle<i::String> name =
       isolate->factory()->InternalizeUtf8String(entry->name());
-  if (!entry->has_name_prefix()) {
-    return ToApiHandle<String>(name);
-  } else {
-    // We do not expect this to fail. Change this if it does.
-    i::Handle<i::String> cons = isolate->factory()->NewConsString(
-        isolate->factory()->InternalizeUtf8String(entry->name_prefix()),
-        name).ToHandleChecked();
-    return ToApiHandle<String>(cons);
-  }
+  return ToApiHandle<String>(name);
 }
 
 int debug::Coverage::BlockData::StartOffset() const { return block_->start; }

deps/v8/src/isolate.cc

@@ -2689,7 +2689,6 @@ bool Isolate::Init(StartupDeserializer* des) {
   call_descriptor_data_ =
       new CallInterfaceDescriptorData[CallDescriptors::NUMBER_OF_DESCRIPTORS];
   access_compiler_data_ = new AccessCompilerData();
-  cpu_profiler_ = new CpuProfiler(this);
   heap_profiler_ = new HeapProfiler(heap());
   interpreter_ = new interpreter::Interpreter(this);
   compiler_dispatcher_ =
@@ -3686,6 +3685,13 @@ void Isolate::PrintWithTimestamp(const char* format, ...) {
   va_end(arguments);
 }
 
+CpuProfiler* Isolate::EnsureCpuProfiler() {
+  if (!cpu_profiler_) {
+    cpu_profiler_ = new CpuProfiler(this);
+  }
+  return cpu_profiler_;
+}
+
 bool StackLimitCheck::JsHasOverflowed(uintptr_t gap) const {
   StackGuard* stack_guard = isolate_->stack_guard();
 #ifdef USE_SIMULATOR

deps/v8/src/isolate.h

@@ -1449,7 +1449,7 @@ class Isolate {
 
   // TODO(alph): Remove along with the deprecated GetCpuProfiler().
   friend v8::CpuProfiler* v8::Isolate::GetCpuProfiler();
-  CpuProfiler* cpu_profiler() const { return cpu_profiler_; }
+  CpuProfiler* EnsureCpuProfiler();
 
   base::Atomic32 id_;
   EntryStackItem* entry_stack_;

deps/v8/src/log.cc

@@ -22,7 +22,6 @@
 #include "src/log-utils.h"
 #include "src/macro-assembler.h"
 #include "src/perf-jit.h"
-#include "src/profiler/profiler-listener.h"
 #include "src/profiler/tick-sample.h"
 #include "src/runtime-profiler.h"
 #include "src/source-position-table.h"
@@ -739,7 +738,6 @@ Logger::Logger(Isolate* isolate)
       perf_jit_logger_(NULL),
       ll_logger_(NULL),
       jit_logger_(NULL),
-      listeners_(5),
       is_initialized_(false) {}
 
 Logger::~Logger() {
@@ -1876,8 +1874,6 @@ bool Logger::SetUp(Isolate* isolate) {
     profiler_->Engage();
   }
 
-  profiler_listener_.reset();
-
   if (is_logging_) {
     addCodeEventListener(this);
   }
@@ -1905,19 +1901,6 @@ void Logger::SetCodeEventHandler(uint32_t options,
   }
 }
 
-void Logger::SetUpProfilerListener() {
-  if (!is_initialized_) return;
-  if (profiler_listener_.get() == nullptr) {
-    profiler_listener_.reset(new ProfilerListener(isolate_));
-  }
-  addCodeEventListener(profiler_listener_.get());
-}
-
-void Logger::TearDownProfilerListener() {
-  if (profiler_listener_->HasObservers()) return;
-  removeCodeEventListener(profiler_listener_.get());
-}
-
 sampler::Sampler* Logger::sampler() {
   return ticker_;
 }
@@ -1961,10 +1944,6 @@ FILE* Logger::TearDown() {
     jit_logger_ = NULL;
   }
 
-  if (profiler_listener_.get() != nullptr) {
-    removeCodeEventListener(profiler_listener_.get());
-  }
-
   return log_->Close();
 }
 

deps/v8/src/log.h

@@ -74,7 +74,6 @@ class LowLevelLogger;
 class PerfBasicLogger;
 class PerfJitLogger;
 class Profiler;
-class ProfilerListener;
 class RuntimeCallTimer;
 class Ticker;
 
@@ -102,16 +101,8 @@ class Logger : public CodeEventListener {
   void SetCodeEventHandler(uint32_t options,
                            JitCodeEventHandler event_handler);
 
-  // Sets up ProfilerListener.
-  void SetUpProfilerListener();
-
-  // Tear down ProfilerListener if it has no observers.
-  void TearDownProfilerListener();
-
   sampler::Sampler* sampler();
 
-  ProfilerListener* profiler_listener() { return profiler_listener_.get(); }
-
   // Frees resources acquired in SetUp.
   // When a temporary file is used for the log, returns its stream descriptor,
   // leaving the file open.
@@ -316,8 +307,6 @@ class Logger : public CodeEventListener {
   PerfJitLogger* perf_jit_logger_;
   LowLevelLogger* ll_logger_;
   JitLogger* jit_logger_;
-  std::unique_ptr<ProfilerListener> profiler_listener_;
-  List<CodeEventListener*> listeners_;
   std::set<int> logged_source_code_;
   uint32_t next_source_info_id_ = 0;
 

deps/v8/src/profiler/cpu-profiler-inl.h

@@ -35,7 +35,11 @@ void CodeDisableOptEventRecord::UpdateCodeMap(CodeMap* code_map) {
 
 void CodeDeoptEventRecord::UpdateCodeMap(CodeMap* code_map) {
   CodeEntry* entry = code_map->FindEntry(start);
-  if (entry != NULL) entry->set_deopt_info(deopt_reason, deopt_id);
+  if (entry == nullptr) return;
+  std::vector<CpuProfileDeoptFrame> frames_vector(
+      deopt_frames, deopt_frames + deopt_frame_count);
+  entry->set_deopt_info(deopt_reason, deopt_id, std::move(frames_vector));
+  delete[] deopt_frames;
 }
 
 

deps/v8/src/profiler/cpu-profiler.cc

@@ -4,6 +4,12 @@
 
 #include "src/profiler/cpu-profiler.h"
 
+#include <unordered_map>
+#include <utility>
+
+#include "src/base/lazy-instance.h"
+#include "src/base/platform/mutex.h"
+#include "src/base/template-utils.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/frames-inl.h"
@@ -275,20 +281,19 @@ void CpuProfiler::set_sampling_interval(base::TimeDelta value) {
 void CpuProfiler::ResetProfiles() {
   profiles_.reset(new CpuProfilesCollection(isolate_));
   profiles_->set_cpu_profiler(this);
+  profiler_listener_.reset();
+  generator_.reset();
 }
 
 void CpuProfiler::CreateEntriesForRuntimeCallStats() {
-  static_entries_.clear();
   RuntimeCallStats* rcs = isolate_->counters()->runtime_call_stats();
   CodeMap* code_map = generator_->code_map();
   for (int i = 0; i < RuntimeCallStats::counters_count; ++i) {
     RuntimeCallCounter* counter = &(rcs->*(RuntimeCallStats::counters[i]));
     DCHECK(counter->name());
-    std::unique_ptr<CodeEntry> entry(
-        new CodeEntry(CodeEventListener::FUNCTION_TAG, counter->name(),
-                      CodeEntry::kEmptyNamePrefix, "native V8Runtime"));
-    code_map->AddCode(reinterpret_cast<Address>(counter), entry.get(), 1);
-    static_entries_.push_back(std::move(entry));
+    auto entry = new CodeEntry(CodeEventListener::FUNCTION_TAG, counter->name(),
+                               "native V8Runtime");
+    code_map->AddCode(reinterpret_cast<Address>(counter), entry, 1);
   }
 }
 
@@ -321,13 +326,17 @@ void CpuProfiler::StartProcessorIfNotStarted() {
   // Disable logging when using the new implementation.
   saved_is_logging_ = logger->is_logging_;
   logger->is_logging_ = false;
-  generator_.reset(new ProfileGenerator(profiles_.get()));
+  if (!generator_) {
+    generator_.reset(new ProfileGenerator(profiles_.get()));
+    CreateEntriesForRuntimeCallStats();
+  }
   processor_.reset(new ProfilerEventsProcessor(isolate_, generator_.get(),
                                                sampling_interval_));
-  CreateEntriesForRuntimeCallStats();
-  logger->SetUpProfilerListener();
-  ProfilerListener* profiler_listener = logger->profiler_listener();
-  profiler_listener->AddObserver(this);
+  if (!profiler_listener_) {
+    profiler_listener_.reset(new ProfilerListener(isolate_, this));
+  }
+  logger->addCodeEventListener(profiler_listener_.get());
+
   is_profiling_ = true;
   isolate_->set_is_profiling(true);
   // Enumerate stuff we already have in the heap.
@@ -362,12 +371,9 @@ void CpuProfiler::StopProcessor() {
   Logger* logger = isolate_->logger();
   is_profiling_ = false;
   isolate_->set_is_profiling(false);
-  ProfilerListener* profiler_listener = logger->profiler_listener();
-  profiler_listener->RemoveObserver(this);
+  logger->removeCodeEventListener(profiler_listener_.get());
   processor_->StopSynchronously();
-  logger->TearDownProfilerListener();
   processor_.reset();
-  generator_.reset();
   logger->is_logging_ = saved_is_logging_;
 }
 

deps/v8/src/profiler/cpu-profiler.h

@@ -86,6 +86,8 @@ class CodeDeoptEventRecord : public CodeEventRecord {
   int deopt_id;
   void* pc;
   int fp_to_sp_delta;
+  CpuProfileDeoptFrame* deopt_frames;
+  int deopt_frame_count;
 
   INLINE(void UpdateCodeMap(CodeMap* code_map));
 };
@@ -214,6 +216,10 @@ class CpuProfiler : public CodeEventObserver {
   ProfilerEventsProcessor* processor() const { return processor_.get(); }
   Isolate* isolate() const { return isolate_; }
 
+  ProfilerListener* profiler_listener_for_test() {
+    return profiler_listener_.get();
+  }
+
  private:
   void StartProcessorIfNotStarted();
   void StopProcessorIfLastProfile(const char* title);
@@ -227,7 +233,7 @@ class CpuProfiler : public CodeEventObserver {
   std::unique_ptr<CpuProfilesCollection> profiles_;
   std::unique_ptr<ProfileGenerator> generator_;
   std::unique_ptr<ProfilerEventsProcessor> processor_;
-  std::vector<std::unique_ptr<CodeEntry>> static_entries_;
+  std::unique_ptr<ProfilerListener> profiler_listener_;
   bool saved_is_logging_;
   bool is_profiling_;
 
@@ -237,5 +243,4 @@ class CpuProfiler : public CodeEventObserver {
 }  // namespace internal
 }  // namespace v8
 
-
 #endif  // V8_PROFILER_CPU_PROFILER_H_

deps/v8/src/profiler/heap-profiler.cc

@@ -16,7 +16,7 @@ namespace internal {
 
 HeapProfiler::HeapProfiler(Heap* heap)
     : ids_(new HeapObjectsMap(heap)),
-      names_(new StringsStorage(heap)),
+      names_(new StringsStorage(heap->HashSeed())),
       is_tracking_object_moves_(false),
       get_retainer_infos_callback_(nullptr) {}
 
@@ -34,7 +34,7 @@ HeapProfiler::~HeapProfiler() {
 void HeapProfiler::DeleteAllSnapshots() {
   snapshots_.Iterate(DeleteHeapSnapshot);
   snapshots_.Clear();
-  names_.reset(new StringsStorage(heap()));
+  names_.reset(new StringsStorage(heap()->HashSeed()));
 }
 
 

deps/v8/src/profiler/profile-generator-inl.h

@@ -11,33 +11,34 @@ namespace v8 {
 namespace internal {
 
 CodeEntry::CodeEntry(CodeEventListener::LogEventsAndTags tag, const char* name,
-                     const char* name_prefix, const char* resource_name,
-                     int line_number, int column_number,
-                     JITLineInfoTable* line_info, Address instruction_start)
+                     const char* resource_name, int line_number,
+                     int column_number,
+                     std::unique_ptr<SourcePositionTable> line_info,
+                     Address instruction_start)
     : bit_field_(TagField::encode(tag) |
                  BuiltinIdField::encode(Builtins::builtin_count)),
-      name_prefix_(name_prefix),
       name_(name),
       resource_name_(resource_name),
       line_number_(line_number),
       column_number_(column_number),
       script_id_(v8::UnboundScript::kNoScriptId),
       position_(0),
-      bailout_reason_(kEmptyBailoutReason),
-      deopt_reason_(kNoDeoptReason),
-      deopt_id_(kNoDeoptimizationId),
-      line_info_(line_info),
+      line_info_(std::move(line_info)),
       instruction_start_(instruction_start) {}
 
+inline CodeEntry* ProfileGenerator::FindEntry(Address address) {
+  CodeEntry* entry = code_map_.FindEntry(address);
+  if (entry) entry->mark_used();
+  return entry;
+}
+
 ProfileNode::ProfileNode(ProfileTree* tree, CodeEntry* entry,
                          ProfileNode* parent)
     : tree_(tree),
       entry_(entry),
       self_ticks_(0),
-      children_(CodeEntriesMatch),
       parent_(parent),
-      id_(tree->next_node_id()),
-      line_ticks_(LineTickMatch) {
+      id_(tree->next_node_id()) {
   tree_->EnqueueNode(this);
 }