deps: backport aa6ce3e from upstream V8

Original commit message:

    [log][api] introduce public CodeEventListener API

    Introduce a new public API called CodeEventListener to allow
    embedders to better support external profilers and other diagnostic
    tools without relying on unsupported methods like --perf-basic-prof.

    Bug: v8:7694
    Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
    Change-Id: I063cc965394d59401358757634c9ea84c11517e9
    Co-authored-by: Daniel Beckert <[email protected]>
    Reviewed-on: https://chromium-review.googlesource.com/1028770
    Commit-Queue: Yang Guo <[email protected]>
    Reviewed-by: Hannes Payer <[email protected]>
    Reviewed-by: Yang Guo <[email protected]>
    Reviewed-by: Andreas Haas <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#53382}

Refs: v8/v8@aa6ce3e

PR-URL: #21126
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: Matheus Marchini

common.gypi

@@ -27,7 +27,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.9',
+    'v8_embedder_string': '-node.10',
 
     # Enable disassembler for `--print-code` v8 options
     'v8_enable_disassembler': 1,

deps/v8/include/v8-profiler.h

@@ -988,6 +988,76 @@ struct HeapStatsUpdate {
   uint32_t size;  // New value of size field for the interval with this index.
 };
 
+#define CODE_EVENTS_LIST(V) \
+  V(Builtin)                \
+  V(Callback)               \
+  V(Eval)                   \
+  V(Function)               \
+  V(InterpretedFunction)    \
+  V(Handler)                \
+  V(BytecodeHandler)        \
+  V(LazyCompile)            \
+  V(RegExp)                 \
+  V(Script)                 \
+  V(Stub)
+
+/**
+ * Note that this enum may be extended in the future. Please include a default
+ * case if this enum is used in a switch statement.
+ */
+enum CodeEventType {
+  kUnknownType = 0
+#define V(Name) , k##Name##Type
+  CODE_EVENTS_LIST(V)
+#undef V
+};
+
+/**
+ * Representation of a code creation event
+ */
+class V8_EXPORT CodeEvent {
+ public:
+  uintptr_t GetCodeStartAddress();
+  size_t GetCodeSize();
+  Local<String> GetFunctionName();
+  Local<String> GetScriptName();
+  int GetScriptLine();
+  int GetScriptColumn();
+  /**
+   * NOTE (mmarchini): We can't allocate objects in the heap when we collect
+   * existing code, and both the code type and the comment are not stored in the
+   * heap, so we return those as const char*.
+   */
+  CodeEventType GetCodeType();
+  const char* GetComment();
+
+  static const char* GetCodeEventTypeName(CodeEventType code_event_type);
+};
+
+/**
+ * Interface to listen to code creation events.
+ */
+class V8_EXPORT CodeEventHandler {
+ public:
+  /**
+   * Creates a new listener for the |isolate|. The isolate must be initialized.
+   * The listener object must be disposed after use by calling |Dispose| method.
+   * Multiple listeners can be created for the same isolate.
+   */
+  explicit CodeEventHandler(Isolate* isolate);
+  virtual ~CodeEventHandler();
+
+  virtual void Handle(CodeEvent* code_event) = 0;
+
+  void Enable();
+  void Disable();
+
+ private:
+  CodeEventHandler();
+  CodeEventHandler(const CodeEventHandler&);
+  CodeEventHandler& operator=(const CodeEventHandler&);
+  void* internal_listener_;
+};
 
 }  // namespace v8
 

deps/v8/src/api.cc

@@ -10211,6 +10211,70 @@ void CpuProfiler::SetIdle(bool is_idle) {
   isolate->SetIdle(is_idle);
 }
 
+uintptr_t CodeEvent::GetCodeStartAddress() {
+  return reinterpret_cast<i::CodeEvent*>(this)->code_start_address;
+}
+
+size_t CodeEvent::GetCodeSize() {
+  return reinterpret_cast<i::CodeEvent*>(this)->code_size;
+}
+
+Local<String> CodeEvent::GetFunctionName() {
+  return ToApiHandle<String>(
+      reinterpret_cast<i::CodeEvent*>(this)->function_name);
+}
+
+Local<String> CodeEvent::GetScriptName() {
+  return ToApiHandle<String>(
+      reinterpret_cast<i::CodeEvent*>(this)->script_name);
+}
+
+int CodeEvent::GetScriptLine() {
+  return reinterpret_cast<i::CodeEvent*>(this)->script_line;
+}
+
+int CodeEvent::GetScriptColumn() {
+  return reinterpret_cast<i::CodeEvent*>(this)->script_column;
+}
+
+CodeEventType CodeEvent::GetCodeType() {
+  return reinterpret_cast<i::CodeEvent*>(this)->code_type;
+}
+
+const char* CodeEvent::GetComment() {
+  return reinterpret_cast<i::CodeEvent*>(this)->comment;
+}
+
+const char* CodeEvent::GetCodeEventTypeName(CodeEventType code_event_type) {
+  switch (code_event_type) {
+    case kUnknownType:
+      return "Unknown";
+#define V(Name)       \
+  case k##Name##Type: \
+    return #Name;
+      CODE_EVENTS_LIST(V)
+#undef V
+  }
+}
+
+CodeEventHandler::CodeEventHandler(Isolate* isolate) {
+  internal_listener_ =
+      new i::ExternalCodeEventListener(reinterpret_cast<i::Isolate*>(isolate));
+}
+
+CodeEventHandler::~CodeEventHandler() {
+  delete reinterpret_cast<i::ExternalCodeEventListener*>(internal_listener_);
+}
+
+void CodeEventHandler::Enable() {
+  reinterpret_cast<i::ExternalCodeEventListener*>(internal_listener_)
+      ->StartListening(this);
+}
+
+void CodeEventHandler::Disable() {
+  reinterpret_cast<i::ExternalCodeEventListener*>(internal_listener_)
+      ->StopListening();
+}
 
 static i::HeapGraphEdge* ToInternal(const HeapGraphEdge* edge) {
   return const_cast<i::HeapGraphEdge*>(

deps/v8/src/code-events.h

@@ -24,32 +24,38 @@ class WasmCode;
 using WasmName = Vector<const char>;
 }  // namespace wasm
 
-#define LOG_EVENTS_AND_TAGS_LIST(V)                      \
-  V(CODE_CREATION_EVENT, "code-creation")                \
-  V(CODE_DISABLE_OPT_EVENT, "code-disable-optimization") \
-  V(CODE_MOVE_EVENT, "code-move")                        \
-  V(CODE_DELETE_EVENT, "code-delete")                    \
-  V(CODE_MOVING_GC, "code-moving-gc")                    \
-  V(SHARED_FUNC_MOVE_EVENT, "sfi-move")                  \
-  V(SNAPSHOT_CODE_NAME_EVENT, "snapshot-code-name")      \
-  V(TICK_EVENT, "tick")                                  \
-  V(BUILTIN_TAG, "Builtin")                              \
-  V(CALLBACK_TAG, "Callback")                            \
-  V(EVAL_TAG, "Eval")                                    \
-  V(FUNCTION_TAG, "Function")                            \
-  V(INTERPRETED_FUNCTION_TAG, "InterpretedFunction")     \
-  V(HANDLER_TAG, "Handler")                              \
-  V(BYTECODE_HANDLER_TAG, "BytecodeHandler")             \
-  V(LAZY_COMPILE_TAG, "LazyCompile")                     \
-  V(REG_EXP_TAG, "RegExp")                               \
-  V(SCRIPT_TAG, "Script")                                \
-  V(STUB_TAG, "Stub")                                    \
-  V(NATIVE_FUNCTION_TAG, "Function")                     \
-  V(NATIVE_LAZY_COMPILE_TAG, "LazyCompile")              \
-  V(NATIVE_SCRIPT_TAG, "Script")
+#define LOG_EVENTS_LIST(V)                             \
+  V(CODE_CREATION_EVENT, code-creation)                \
+  V(CODE_DISABLE_OPT_EVENT, code-disable-optimization) \
+  V(CODE_MOVE_EVENT, code-move)                        \
+  V(CODE_DELETE_EVENT, code-delete)                    \
+  V(CODE_MOVING_GC, code-moving-gc)                    \
+  V(SHARED_FUNC_MOVE_EVENT, sfi-move)                  \
+  V(SNAPSHOT_CODE_NAME_EVENT, snapshot-code-name)      \
+  V(TICK_EVENT, tick)
+
+#define TAGS_LIST(V)                               \
+  V(BUILTIN_TAG, Builtin)                          \
+  V(CALLBACK_TAG, Callback)                        \
+  V(EVAL_TAG, Eval)                                \
+  V(FUNCTION_TAG, Function)                        \
+  V(INTERPRETED_FUNCTION_TAG, InterpretedFunction) \
+  V(HANDLER_TAG, Handler)                          \
+  V(BYTECODE_HANDLER_TAG, BytecodeHandler)         \
+  V(LAZY_COMPILE_TAG, LazyCompile)                 \
+  V(REG_EXP_TAG, RegExp)                           \
+  V(SCRIPT_TAG, Script)                            \
+  V(STUB_TAG, Stub)                                \
+  V(NATIVE_FUNCTION_TAG, Function)                 \
+  V(NATIVE_LAZY_COMPILE_TAG, LazyCompile)          \
+  V(NATIVE_SCRIPT_TAG, Script)
 // Note that 'NATIVE_' cases for functions and scripts are mapped onto
 // original tags when writing to the log.
 
+#define LOG_EVENTS_AND_TAGS_LIST(V) \
+  LOG_EVENTS_LIST(V)                \
+  TAGS_LIST(V)
+
 #define PROFILE(the_isolate, Call) (the_isolate)->code_event_dispatcher()->Call;
 
 class CodeEventListener {
@@ -85,6 +91,8 @@ class CodeEventListener {
   enum DeoptKind { kSoft, kLazy, kEager };
   virtual void CodeDeoptEvent(Code* code, DeoptKind kind, Address pc,
                               int fp_to_sp_delta) = 0;
+
+  virtual bool is_listening_to_code_events() { return false; }
 };
 
 class CodeEventDispatcher {
@@ -101,6 +109,14 @@ class CodeEventDispatcher {
     base::LockGuard<base::Mutex> guard(&mutex_);
     listeners_.erase(listener);
   }
+  bool IsListeningToCodeEvents() {
+    for (auto it : listeners_) {
+      if (it->is_listening_to_code_events()) {
+        return true;
+      }
+    }
+    return false;
+  }
 
 #define CODE_EVENT_DISPATCH(code)              \
   base::LockGuard<base::Mutex> guard(&mutex_); \

deps/v8/src/compiler.cc

@@ -84,8 +84,9 @@ void LogFunctionCompilation(CodeEventListener::LogEventsAndTags tag,
   // Log the code generation. If source information is available include
   // script name and line number. Check explicitly whether logging is
   // enabled as finding the line number is not free.
-  if (!isolate->logger()->is_logging_code_events() &&
-      !isolate->is_profiling() && !FLAG_log_function_events) {
+  if (!isolate->logger()->is_listening_to_code_events() &&
+      !isolate->is_profiling() && !FLAG_log_function_events &&
+      !isolate->code_event_dispatcher()->IsListeningToCodeEvents()) {
     return;
   }
 

deps/v8/src/compiler/wasm-compiler.cc

@@ -4625,7 +4625,8 @@ Node* WasmGraphBuilder::AtomicOp(wasm::WasmOpcode opcode, Node* const* inputs,
 
 namespace {
 bool must_record_function_compilation(Isolate* isolate) {
-  return isolate->logger()->is_logging_code_events() || isolate->is_profiling();
+  return isolate->logger()->is_listening_to_code_events() ||
+         isolate->is_profiling();
 }
 
 PRINTF_FORMAT(4, 5)

deps/v8/src/heap/mark-compact.cc

@@ -2458,7 +2458,7 @@ void MarkCompactCollectorBase::CreateAndExecuteEvacuationTasks(
 
   const bool profiling =
       heap()->isolate()->is_profiling() ||
-      heap()->isolate()->logger()->is_logging_code_events() ||
+      heap()->isolate()->logger()->is_listening_to_code_events() ||
       heap()->isolate()->heap_profiler()->is_tracking_object_moves() ||
       heap()->has_heap_object_allocation_tracker();
   ProfilingMigrationObserver profiling_observer(heap());

deps/v8/src/isolate.cc

@@ -2883,7 +2883,7 @@ void CreateOffHeapTrampolines(Isolate* isolate) {
     // thus collected by the GC.
     builtins->set_builtin(i, *trampoline);
 
-    if (isolate->logger()->is_logging_code_events() ||
+    if (isolate->logger()->is_listening_to_code_events() ||
         isolate->is_profiling()) {
       isolate->logger()->LogCodeObject(*trampoline);
     }

deps/v8/src/isolate.h

@@ -56,6 +56,7 @@ class BuiltinsConstantsTableBuilder;
 class CallInterfaceDescriptorData;
 class CancelableTaskManager;
 class CodeEventDispatcher;
+class ExternalCodeEventListener;
 class CodeGenerator;
 class CodeRange;
 class CodeStubDescriptor;