deps: patch V8 to 7.4.288.21

Refs: v8/v8@7.4.288.18...7.4.288.21

deps/v8/include/v8-version.h

@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 7
 #define V8_MINOR_VERSION 4
 #define V8_BUILD_NUMBER 288
-#define V8_PATCH_LEVEL 18
+#define V8_PATCH_LEVEL 21
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)

deps/v8/src/arm/macro-assembler-arm.cc

@@ -332,31 +332,30 @@ void TurboAssembler::LoadCodeObjectEntry(Register destination,
 
   if (options().isolate_independent_code) {
     DCHECK(root_array_available());
-    Label if_code_is_builtin, out;
+    Label if_code_is_off_heap, out;
 
     UseScratchRegisterScope temps(this);
     Register scratch = temps.Acquire();
 
     DCHECK(!AreAliased(destination, scratch));
     DCHECK(!AreAliased(code_object, scratch));
 
-    // Check whether the Code object is a builtin. If so, call its (off-heap)
-    // entry point directly without going through the (on-heap) trampoline.
-    // Otherwise, just call the Code object as always.
+    // Check whether the Code object is an off-heap trampoline. If so, call its
+    // (off-heap) entry point directly without going through the (on-heap)
+    // trampoline.  Otherwise, just call the Code object as always.
+    ldr(scratch, FieldMemOperand(code_object, Code::kFlagsOffset));
+    tst(scratch, Operand(Code::IsOffHeapTrampoline::kMask));
+    b(ne, &if_code_is_off_heap);
 
-    ldr(scratch, FieldMemOperand(code_object, Code::kBuiltinIndexOffset));
-    cmp(scratch, Operand(Builtins::kNoBuiltinId));
-    b(ne, &if_code_is_builtin);
-
-    // A non-builtin Code object, the entry point is at
+    // Not an off-heap trampoline, the entry point is at
     // Code::raw_instruction_start().
     add(destination, code_object, Operand(Code::kHeaderSize - kHeapObjectTag));
     jmp(&out);
 
-    // A builtin Code object, the entry point is loaded from the builtin entry
+    // An off-heap trampoline, the entry point is loaded from the builtin entry
     // table.
-    // The builtin index is loaded in scratch.
-    bind(&if_code_is_builtin);
+    bind(&if_code_is_off_heap);
+    ldr(scratch, FieldMemOperand(code_object, Code::kBuiltinIndexOffset));
     lsl(destination, scratch, Operand(kSystemPointerSizeLog2));
     add(destination, destination, kRootRegister);
     ldr(destination,

deps/v8/src/arm64/macro-assembler-arm64.cc

@@ -2054,31 +2054,31 @@ void TurboAssembler::LoadCodeObjectEntry(Register destination,
 
   if (options().isolate_independent_code) {
     DCHECK(root_array_available());
-    Label if_code_is_builtin, out;
+    Label if_code_is_off_heap, out;
 
     UseScratchRegisterScope temps(this);
     Register scratch = temps.AcquireX();
 
     DCHECK(!AreAliased(destination, scratch));
     DCHECK(!AreAliased(code_object, scratch));
 
-    // Check whether the Code object is a builtin. If so, call its (off-heap)
-    // entry point directly without going through the (on-heap) trampoline.
-    // Otherwise, just call the Code object as always.
+    // Check whether the Code object is an off-heap trampoline. If so, call its
+    // (off-heap) entry point directly without going through the (on-heap)
+    // trampoline.  Otherwise, just call the Code object as always.
 
-    Ldrsw(scratch, FieldMemOperand(code_object, Code::kBuiltinIndexOffset));
-    Cmp(scratch, Operand(Builtins::kNoBuiltinId));
-    B(ne, &if_code_is_builtin);
+    Ldrsw(scratch, FieldMemOperand(code_object, Code::kFlagsOffset));
+    Tst(scratch, Operand(Code::IsOffHeapTrampoline::kMask));
+    B(ne, &if_code_is_off_heap);
 
-    // A non-builtin Code object, the entry point is at
+    // Not an off-heap trampoline object, the entry point is at
     // Code::raw_instruction_start().
     Add(destination, code_object, Code::kHeaderSize - kHeapObjectTag);
     B(&out);
 
-    // A builtin Code object, the entry point is loaded from the builtin entry
+    // An off-heap trampoline, the entry point is loaded from the builtin entry
     // table.
-    // The builtin index is loaded in scratch.
-    bind(&if_code_is_builtin);
+    bind(&if_code_is_off_heap);
+    Ldrsw(scratch, FieldMemOperand(code_object, Code::kBuiltinIndexOffset));
     Lsl(destination, scratch, kSystemPointerSizeLog2);
     Add(destination, destination, kRootRegister);
     Ldr(destination,

deps/v8/src/ia32/macro-assembler-ia32.cc

@@ -1905,24 +1905,24 @@ void TurboAssembler::LoadCodeObjectEntry(Register destination,
 
   if (options().isolate_independent_code) {
     DCHECK(root_array_available());
-    Label if_code_is_builtin, out;
+    Label if_code_is_off_heap, out;
 
-    // Check whether the Code object is a builtin. If so, call its (off-heap)
-    // entry point directly without going through the (on-heap) trampoline.
-    // Otherwise, just call the Code object as always.
-    cmp(FieldOperand(code_object, Code::kBuiltinIndexOffset),
-        Immediate(Builtins::kNoBuiltinId));
-    j(not_equal, &if_code_is_builtin);
+    // Check whether the Code object is an off-heap trampoline. If so, call its
+    // (off-heap) entry point directly without going through the (on-heap)
+    // trampoline.  Otherwise, just call the Code object as always.
+    test(FieldOperand(code_object, Code::kFlagsOffset),
+         Immediate(Code::IsOffHeapTrampoline::kMask));
+    j(not_equal, &if_code_is_off_heap);
 
-    // A non-builtin Code object, the entry point is at
+    // Not an off-heap trampoline, the entry point is at
     // Code::raw_instruction_start().
     Move(destination, code_object);
     add(destination, Immediate(Code::kHeaderSize - kHeapObjectTag));
     jmp(&out);
 
-    // A builtin Code object, the entry point is loaded from the builtin entry
+    // An off-heap trampoline, the entry point is loaded from the builtin entry
     // table.
-    bind(&if_code_is_builtin);
+    bind(&if_code_is_off_heap);
     mov(destination, FieldOperand(code_object, Code::kBuiltinIndexOffset));
     mov(destination,
         Operand(kRootRegister, destination, times_system_pointer_size,

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

@@ -129,7 +129,8 @@ class CompilationStateImpl {
   void SetNumberOfFunctionsToCompile(int num_functions);
 
   // Add the callback function to be called on compilation events. Needs to be
-  // set before {AddCompilationUnits} is run.
+  // set before {AddCompilationUnits} is run to ensure that it receives all
+  // events. The callback object must support being deleted from any thread.
   void AddCallback(CompilationState::callback_t);
 
   // Inserts new functions to compile and kicks off compilation.
@@ -153,7 +154,7 @@ class CompilationStateImpl {
   }
 
   bool baseline_compilation_finished() const {
-    base::MutexGuard guard(&mutex_);
+    base::MutexGuard guard(&callbacks_mutex_);
     return outstanding_baseline_units_ == 0 ||
            (compile_mode_ == CompileMode::kTiering &&
             outstanding_tiering_units_ == 0);
@@ -203,8 +204,6 @@ class CompilationStateImpl {
         : func_index(func_index), error(std::move(error)) {}
   };
 
-  void NotifyOnEvent(CompilationEvent event);
-
   NativeModule* const native_module_;
   const std::shared_ptr<BackgroundCompileToken> background_compile_token_;
   const CompileMode compile_mode_;
@@ -236,16 +235,26 @@ class CompilationStateImpl {
   // compiling.
   std::shared_ptr<WireBytesStorage> wire_bytes_storage_;
 
-  int outstanding_baseline_units_ = 0;
-  int outstanding_tiering_units_ = 0;
-
   // End of fields protected by {mutex_}.
   //////////////////////////////////////////////////////////////////////////////
 
-  // Callback functions to be called on compilation events. Only accessible from
-  // the foreground thread.
+  // This mutex protects the callbacks vector, and the counters used to
+  // determine which callbacks to call. The counters plus the callbacks
+  // themselves need to be synchronized to ensure correct order of events.
+  mutable base::Mutex callbacks_mutex_;
+
+  //////////////////////////////////////////////////////////////////////////////
+  // Protected by {callbacks_mutex_}:
+
+  // Callback functions to be called on compilation events.
   std::vector<CompilationState::callback_t> callbacks_;
 
+  int outstanding_baseline_units_ = 0;
+  int outstanding_tiering_units_ = 0;
+
+  // End of fields protected by {callbacks_mutex_}.
+  //////////////////////////////////////////////////////////////////////////////
+
   const int max_background_tasks_ = 0;
 };
 
@@ -852,6 +861,7 @@ std::shared_ptr<StreamingDecoder> AsyncCompileJob::CreateStreamingDecoder() {
 }
 
 AsyncCompileJob::~AsyncCompileJob() {
+  // Note: This destructor always runs on the foreground thread of the isolate.
   background_task_manager_.CancelAndWait();
   // If the runtime objects were not created yet, then initial compilation did
   // not finish yet. In this case we can abort compilation.
@@ -1473,12 +1483,13 @@ CompilationStateImpl::~CompilationStateImpl() {
 void CompilationStateImpl::AbortCompilation() {
   background_compile_token_->Cancel();
   // No more callbacks after abort.
+  base::MutexGuard callbacks_guard(&callbacks_mutex_);
   callbacks_.clear();
 }
 
 void CompilationStateImpl::SetNumberOfFunctionsToCompile(int num_functions) {
   DCHECK(!failed());
-  base::MutexGuard guard(&mutex_);
+  base::MutexGuard guard(&callbacks_mutex_);
   outstanding_baseline_units_ = num_functions;
 
   if (compile_mode_ == CompileMode::kTiering) {
@@ -1487,6 +1498,7 @@ void CompilationStateImpl::SetNumberOfFunctionsToCompile(int num_functions) {
 }
 
 void CompilationStateImpl::AddCallback(CompilationState::callback_t callback) {
+  base::MutexGuard callbacks_guard(&callbacks_mutex_);
   callbacks_.emplace_back(std::move(callback));
 }
 
@@ -1536,7 +1548,7 @@ CompilationStateImpl::GetNextCompilationUnit() {
 
 void CompilationStateImpl::OnFinishedUnit(ExecutionTier tier, WasmCode* code) {
   // This mutex guarantees that events happen in the right order.
-  base::MutexGuard guard(&mutex_);
+  base::MutexGuard guard(&callbacks_mutex_);
 
   // If we are *not* compiling in tiering mode, then all units are counted as
   // baseline units.
@@ -1547,28 +1559,36 @@ void CompilationStateImpl::OnFinishedUnit(ExecutionTier tier, WasmCode* code) {
   // tiering units.
   DCHECK_IMPLIES(!is_tiering_mode, outstanding_tiering_units_ == 0);
 
+  bool baseline_finished = false;
+  bool tiering_finished = false;
   if (is_tiering_unit) {
     DCHECK_LT(0, outstanding_tiering_units_);
     --outstanding_tiering_units_;
-    if (outstanding_tiering_units_ == 0) {
-      // If baseline compilation has not finished yet, then also trigger
-      // {kFinishedBaselineCompilation}.
-      if (outstanding_baseline_units_ > 0) {
-        NotifyOnEvent(CompilationEvent::kFinishedBaselineCompilation);
-      }
-      NotifyOnEvent(CompilationEvent::kFinishedTopTierCompilation);
-    }
+    tiering_finished = outstanding_tiering_units_ == 0;
+    // If baseline compilation has not finished yet, then also trigger
+    // {kFinishedBaselineCompilation}.
+    baseline_finished = tiering_finished && outstanding_baseline_units_ > 0;
   } else {
     DCHECK_LT(0, outstanding_baseline_units_);
     --outstanding_baseline_units_;
-    if (outstanding_baseline_units_ == 0) {
-      NotifyOnEvent(CompilationEvent::kFinishedBaselineCompilation);
-      // If we are not tiering, then we also trigger the "top tier finished"
-      // event when baseline compilation is finished.
-      if (!is_tiering_mode) {
-        NotifyOnEvent(CompilationEvent::kFinishedTopTierCompilation);
-      }
-    }
+    // If we are in tiering mode and tiering finished before, then do not
+    // trigger baseline finished.
+    baseline_finished = outstanding_baseline_units_ == 0 &&
+                        (!is_tiering_mode || outstanding_tiering_units_ > 0);
+    // If we are not tiering, then we also trigger the "top tier finished"
+    // event when baseline compilation is finished.
+    tiering_finished = baseline_finished && !is_tiering_mode;
+  }
+
+  if (baseline_finished) {
+    for (auto& callback : callbacks_)
+      callback(CompilationEvent::kFinishedBaselineCompilation);
+  }
+  if (tiering_finished) {
+    for (auto& callback : callbacks_)
+      callback(CompilationEvent::kFinishedTopTierCompilation);
+    // Clear the callbacks because no more events will be delivered.
+    callbacks_.clear();
   }
 
   if (code != nullptr) native_module_->engine()->LogCode(code);
@@ -1648,17 +1668,12 @@ void CompilationStateImpl::SetError(uint32_t func_index,
   if (!set) return;
   // If set successfully, give up ownership.
   compile_error.release();
-  // Schedule a foreground task to call the callback and notify users about the
-  // compile error.
-  NotifyOnEvent(CompilationEvent::kFailedCompilation);
-}
-
-void CompilationStateImpl::NotifyOnEvent(CompilationEvent event) {
-  for (auto& callback : callbacks_) callback(event);
-  // If no more events are expected after this one, clear the callbacks to free
-  // memory. We can safely do this here, as this method is only called from
-  // foreground tasks.
-  if (event >= CompilationEvent::kFirstFinalEvent) callbacks_.clear();
+  base::MutexGuard callbacks_guard(&callbacks_mutex_);
+  for (auto& callback : callbacks_) {
+    callback(CompilationEvent::kFailedCompilation);
+  }
+  // No more callbacks after an error.
+  callbacks_.clear();
 }
 
 void CompileJsToWasmWrappers(Isolate* isolate, const WasmModule* module,

deps/v8/src/x64/macro-assembler-x64.cc

@@ -1588,24 +1588,24 @@ void TurboAssembler::LoadCodeObjectEntry(Register destination,
 
   if (options().isolate_independent_code) {
     DCHECK(root_array_available());
-    Label if_code_is_builtin, out;
+    Label if_code_is_off_heap, out;
 
-    // Check whether the Code object is a builtin. If so, call its (off-heap)
-    // entry point directly without going through the (on-heap) trampoline.
-    // Otherwise, just call the Code object as always.
-    cmpl(FieldOperand(code_object, Code::kBuiltinIndexOffset),
-         Immediate(Builtins::kNoBuiltinId));
-    j(not_equal, &if_code_is_builtin);
+    // Check whether the Code object is an off-heap trampoline. If so, call its
+    // (off-heap) entry point directly without going through the (on-heap)
+    // trampoline.  Otherwise, just call the Code object as always.
+    testl(FieldOperand(code_object, Code::kFlagsOffset),
+          Immediate(Code::IsOffHeapTrampoline::kMask));
+    j(not_equal, &if_code_is_off_heap);
 
-    // A non-builtin Code object, the entry point is at
+    // Not an off-heap trampoline, the entry point is at
     // Code::raw_instruction_start().
     Move(destination, code_object);
     addq(destination, Immediate(Code::kHeaderSize - kHeapObjectTag));
     jmp(&out);
 
-    // A builtin Code object, the entry point is loaded from the builtin entry
+    // An off-heap trampoline, the entry point is loaded from the builtin entry
     // table.
-    bind(&if_code_is_builtin);
+    bind(&if_code_is_off_heap);
     movl(destination, FieldOperand(code_object, Code::kBuiltinIndexOffset));
     movq(destination,
          Operand(kRootRegister, destination, times_system_pointer_size,

deps/v8/src/zone/accounting-allocator.cc

@@ -24,7 +24,7 @@ Segment* AccountingAllocator::AllocateSegment(size_t bytes) {
   if (memory == nullptr) return nullptr;
 
   size_t current =
-      current_memory_usage_.fetch_add(bytes, std::memory_order_relaxed);
+      current_memory_usage_.fetch_add(bytes, std::memory_order_relaxed) + bytes;
   size_t max = max_memory_usage_.load(std::memory_order_relaxed);
   while (current > max && !max_memory_usage_.compare_exchange_weak(
                               max, current, std::memory_order_relaxed)) {

deps/v8/test/cctest/cctest.status

@@ -615,6 +615,10 @@
   'test-run-wasm-exceptions/RunWasmTurbofan_TryCatchThrow': [SKIP],
   'test-run-wasm-exceptions/RunWasmTurbofan_TryCatchTrapTypeError': [SKIP],
 
+  # --interpreted-frames-native-stack tests
+  'test-log/ExternalCodeEventListenerWithInterpretedFramesNativeStack': [SKIP],
+  'test-log/LogInterpretedFramesNativeStack': [SKIP],
+
   # Crashes on native arm.
   'test-macro-assembler-arm/ExtractLane': [PASS, ['arch == arm and not simulator_run', SKIP]],
   'test-macro-assembler-arm/LoadAndStoreWithRepresentation': [PASS, ['arch == arm and not simulator_run', SKIP]],

deps/v8/test/cctest/test-allocation.cc

@@ -105,6 +105,34 @@ TEST(AccountingAllocatorOOM) {
   CHECK_EQ(result == nullptr, platform.oom_callback_called);
 }
 
+TEST(AccountingAllocatorCurrentAndMax) {
+  AllocationPlatform platform;
+  v8::internal::AccountingAllocator allocator;
+  static constexpr size_t kAllocationSizes[] = {51, 231, 27};
+  std::vector<v8::internal::Segment*> segments;
+  CHECK_EQ(0, allocator.GetCurrentMemoryUsage());
+  CHECK_EQ(0, allocator.GetMaxMemoryUsage());
+  size_t expected_current = 0;
+  size_t expected_max = 0;
+  for (size_t size : kAllocationSizes) {
+    segments.push_back(allocator.AllocateSegment(size));
+    CHECK_NOT_NULL(segments.back());
+    CHECK_EQ(size, segments.back()->total_size());
+    expected_current += size;
+    if (expected_current > expected_max) expected_max = expected_current;
+    CHECK_EQ(expected_current, allocator.GetCurrentMemoryUsage());
+    CHECK_EQ(expected_max, allocator.GetMaxMemoryUsage());
+  }
+  for (auto* segment : segments) {
+    expected_current -= segment->total_size();
+    allocator.ReturnSegment(segment);
+    CHECK_EQ(expected_current, allocator.GetCurrentMemoryUsage());
+  }
+  CHECK_EQ(expected_max, allocator.GetMaxMemoryUsage());
+  CHECK_EQ(0, allocator.GetCurrentMemoryUsage());
+  CHECK(!platform.oom_callback_called);
+}
+
 TEST(MallocedOperatorNewOOM) {
   AllocationPlatform platform;
   CHECK(!platform.oom_callback_called);