[v19.x backport] wasi: fast calls

common.gypi

@@ -36,7 +36,7 @@
 
     # 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.8',
+    'v8_embedder_string': '-node.9',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/src/compiler/fast-api-calls.cc

@@ -84,6 +84,13 @@ OverloadsResolutionResult ResolveOverloads(
 bool CanOptimizeFastSignature(const CFunctionInfo* c_signature) {
   USE(c_signature);
 
+#if defined(V8_OS_MACOS) && defined(V8_TARGET_ARCH_ARM64)
+  // On MacArm64 hardware we don't support passing of arguments on the stack.
+  if (c_signature->ArgumentCount() > 8) {
+    return false;
+  }
+#endif  // defined(V8_OS_MACOS) && defined(V8_TARGET_ARCH_ARM64)
+
 #ifndef V8_ENABLE_FP_PARAMS_IN_C_LINKAGE
   if (c_signature->ReturnInfo().GetType() == CTypeInfo::Type::kFloat32 ||
       c_signature->ReturnInfo().GetType() == CTypeInfo::Type::kFloat64) {

deps/v8/src/d8/d8-test.cc

@@ -471,6 +471,19 @@ class FastCApiObject {
   }
 
 #ifdef V8_USE_SIMULATOR_WITH_GENERIC_C_CALLS
+  static AnyCType AddAll32BitIntFastCallback_8ArgsPatch(
+      AnyCType receiver, AnyCType should_fallback, AnyCType arg1_i32,
+      AnyCType arg2_i32, AnyCType arg3_i32, AnyCType arg4_u32,
+      AnyCType arg5_u32, AnyCType arg6_u32, AnyCType arg7_u32,
+      AnyCType arg8_u32, AnyCType options) {
+    AnyCType ret;
+    ret.int32_value = AddAll32BitIntFastCallback_8Args(
+        receiver.object_value, should_fallback.bool_value, arg1_i32.int32_value,
+        arg2_i32.int32_value, arg3_i32.int32_value, arg4_u32.uint32_value,
+        arg5_u32.uint32_value, arg6_u32.uint32_value, arg7_u32.uint32_value,
+        arg8_u32.uint32_value, *options.options_value);
+    return ret;
+  }
   static AnyCType AddAll32BitIntFastCallback_6ArgsPatch(
       AnyCType receiver, AnyCType should_fallback, AnyCType arg1_i32,
       AnyCType arg2_i32, AnyCType arg3_i32, AnyCType arg4_u32,
@@ -494,6 +507,26 @@ class FastCApiObject {
   }
 #endif  //  V8_USE_SIMULATOR_WITH_GENERIC_C_CALLS
 
+  static int AddAll32BitIntFastCallback_8Args(
+      Local<Object> receiver, bool should_fallback, int32_t arg1_i32,
+      int32_t arg2_i32, int32_t arg3_i32, uint32_t arg4_u32, uint32_t arg5_u32,
+      uint32_t arg6_u32, uint32_t arg7_u32, uint32_t arg8_u32,
+      FastApiCallbackOptions& options) {
+    FastCApiObject* self = UnwrapObject(receiver);
+    CHECK_SELF_OR_FALLBACK(0);
+    self->fast_call_count_++;
+
+    if (should_fallback) {
+      options.fallback = true;
+      return 0;
+    }
+
+    int64_t result = static_cast<int64_t>(arg1_i32) + arg2_i32 + arg3_i32 +
+                     arg4_u32 + arg5_u32 + arg6_u32 + arg7_u32 + arg8_u32;
+    if (result > INT_MAX) return INT_MAX;
+    if (result < INT_MIN) return INT_MIN;
+    return static_cast<int>(result);
+  }
   static int AddAll32BitIntFastCallback_6Args(
       Local<Object> receiver, bool should_fallback, int32_t arg1_i32,
       int32_t arg2_i32, int32_t arg3_i32, uint32_t arg4_u32, uint32_t arg5_u32,
@@ -531,24 +564,29 @@ class FastCApiObject {
 
     HandleScope handle_scope(isolate);
 
+    Local<Context> context = isolate->GetCurrentContext();
     double sum = 0;
     if (args.Length() > 1 && args[1]->IsNumber()) {
-      sum += args[1]->Int32Value(isolate->GetCurrentContext()).FromJust();
+      sum += args[1]->Int32Value(context).FromJust();
     }
     if (args.Length() > 2 && args[2]->IsNumber()) {
-      sum += args[2]->Int32Value(isolate->GetCurrentContext()).FromJust();
+      sum += args[2]->Int32Value(context).FromJust();
     }
     if (args.Length() > 3 && args[3]->IsNumber()) {
-      sum += args[3]->Int32Value(isolate->GetCurrentContext()).FromJust();
+      sum += args[3]->Int32Value(context).FromJust();
     }
     if (args.Length() > 4 && args[4]->IsNumber()) {
-      sum += args[4]->Uint32Value(isolate->GetCurrentContext()).FromJust();
+      sum += args[4]->Uint32Value(context).FromJust();
     }
     if (args.Length() > 5 && args[5]->IsNumber()) {
-      sum += args[5]->Uint32Value(isolate->GetCurrentContext()).FromJust();
+      sum += args[5]->Uint32Value(context).FromJust();
     }
     if (args.Length() > 6 && args[6]->IsNumber()) {
-      sum += args[6]->Uint32Value(isolate->GetCurrentContext()).FromJust();
+      sum += args[6]->Uint32Value(context).FromJust();
+    }
+    if (args.Length() > 7 && args[7]->IsNumber() && args[8]->IsNumber()) {
+      sum += args[7]->Uint32Value(context).FromJust();
+      sum += args[8]->Uint32Value(context).FromJust();
     }
 
     args.GetReturnValue().Set(Number::New(isolate, sum));
@@ -1160,6 +1198,9 @@ Local<FunctionTemplate> Shell::CreateTestFastCApiTemplate(Isolate* isolate) {
             signature, 1, ConstructorBehavior::kThrow,
             SideEffectType::kHasSideEffect, {add_all_invalid_overloads, 2}));
 
+    CFunction add_all_32bit_int_8args_c_func = CFunction::Make(
+        FastCApiObject::AddAll32BitIntFastCallback_8Args V8_IF_USE_SIMULATOR(
+            FastCApiObject::AddAll32BitIntFastCallback_8ArgsPatch));
     CFunction add_all_32bit_int_6args_c_func = CFunction::Make(
         FastCApiObject::AddAll32BitIntFastCallback_6Args V8_IF_USE_SIMULATOR(
             FastCApiObject::AddAll32BitIntFastCallback_6ArgsPatch));
@@ -1176,6 +1217,13 @@ Local<FunctionTemplate> Shell::CreateTestFastCApiTemplate(Isolate* isolate) {
             signature, 1, ConstructorBehavior::kThrow,
             SideEffectType::kHasSideEffect, {c_function_overloads, 2}));
 
+    api_obj_ctor->PrototypeTemplate()->Set(
+        isolate, "overloaded_add_all_8args",
+        FunctionTemplate::New(
+            isolate, FastCApiObject::AddAll32BitIntSlowCallback, Local<Value>(),
+            signature, 1, ConstructorBehavior::kThrow,
+            SideEffectType::kHasSideEffect, &add_all_32bit_int_8args_c_func));
+
     api_obj_ctor->PrototypeTemplate()->Set(
         isolate, "overloaded_add_all_32bit_int_no_sig",
         FunctionTemplate::NewWithCFunctionOverloads(

deps/v8/test/mjsunit/compiler/fast-api-calls-8args.js

@@ -0,0 +1,50 @@
+// Copyright 2021 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This file tests fast callbacks with more than 8 arguments. It should
+// fail on arm64 + OSX configuration, because of stack alignment issue,
+// see crbug.com/v8/13171.
+
+// Flags: --turbo-fast-api-calls --expose-fast-api --allow-natives-syntax --turbofan
+// --always-turbofan is disabled because we rely on particular feedback for
+// optimizing to the fastest path.
+// Flags: --no-always-turbofan
+// The test relies on optimizing/deoptimizing at predictable moments, so
+// it's not suitable for deoptimization fuzzing.
+// Flags: --deopt-every-n-times=0
+
+const add_all_32bit_int_arg1 = -42;
+const add_all_32bit_int_arg2 = 45;
+const add_all_32bit_int_arg3 = -12345678;
+const add_all_32bit_int_arg4 = 0x1fffffff;
+const add_all_32bit_int_arg5 = 1e6;
+const add_all_32bit_int_arg6 = 1e8;
+const add_all_32bit_int_arg7 = 31;
+const add_all_32bit_int_arg8 = 63;
+const add_all_32bit_int_result_8args = add_all_32bit_int_arg1 +
+add_all_32bit_int_arg2 + add_all_32bit_int_arg3 + add_all_32bit_int_arg4 +
+add_all_32bit_int_arg5 + add_all_32bit_int_arg6 + add_all_32bit_int_arg7 + add_all_32bit_int_arg8;
+
+const fast_c_api = new d8.test.FastCAPI();
+
+(function () {
+  function overloaded_add_all(should_fallback = false) {
+    return fast_c_api.overloaded_add_all_8args(should_fallback,
+      add_all_32bit_int_arg1, add_all_32bit_int_arg2, add_all_32bit_int_arg3,
+      add_all_32bit_int_arg4, add_all_32bit_int_arg5, add_all_32bit_int_arg6,
+      add_all_32bit_int_arg7, add_all_32bit_int_arg8);
+  }
+
+  %PrepareFunctionForOptimization(overloaded_add_all);
+  let result = overloaded_add_all();
+  assertEquals(add_all_32bit_int_result_8args, result);
+
+  fast_c_api.reset_counts();
+  %OptimizeFunctionOnNextCall(overloaded_add_all);
+  result = overloaded_add_all();
+  assertOptimized(overloaded_add_all);
+
+  assertEquals(1, fast_c_api.fast_call_count());
+  assertEquals(0, fast_c_api.slow_call_count());
+})();

deps/v8/test/mjsunit/mjsunit.status

@@ -898,6 +898,14 @@
   'wasm/compare-exchange64-stress': [SKIP],
 }],  # 'system == macos'
 
+##############################################################################
+['system == macos and arch == arm64', {
+  # BUG(v8:13171): The following tests a function that shouldn't be optimized
+  # on M1 hardware, unless a proper fix for the stack corruption is
+  # implemented (see linked issue).
+  'compiler/fast-api-calls-8args': [FAIL],
+}],  # 'system == macos  and arch == arm64'
+
 ##############################################################################
 ['system == windows', {
   # Too slow with turbo fan.