[wasm] Fix inspection of imported wasm tables created in JS

Fixed: chromium:1365101
Change-Id: Ie6f5fa08416348e827de9a389af5d63eba118ceb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3909810
Reviewed-by: Philip Pfaffe <pfaffe@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Matthias Liedtke <mliedtke@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83385}

src/debug/debug-wasm-objects.cc

@@ -729,6 +729,18 @@ Handle<String> GetRefTypeName(Isolate* isolate, wasm::ValueType type,
   return ToInternalString(name, isolate);
 }
 
+// Returns the type name for the given value. Uses the module object for
+// providing user-defined type names if available, otherwise falls back
+// to numbers for indexed types.
+Handle<String> GetRefTypeName(Isolate* isolate, wasm::ValueType type,
+                              Handle<WasmModuleObject> module_object) {
+  if (!module_object.is_null()) {
+    return GetRefTypeName(isolate, type, module_object->native_module());
+  }
+  std::string name = type.name();
+  return isolate->factory()->InternalizeString({name.data(), name.length()});
+}
+
 }  // namespace
 
 // static
@@ -905,38 +917,49 @@ Handle<WasmValueObject> WasmValueObject::New(
     }
     case wasm::kRefNull:
     case wasm::kRef: {
-      t = GetRefTypeName(isolate, value.type(), module_object->native_module());
       Handle<Object> ref = value.to_ref();
       if (ref->IsWasmStruct()) {
         WasmTypeInfo type_info = ref->GetHeapObject().map().wasm_type_info();
         wasm::ValueType type = wasm::ValueType::FromIndex(
             wasm::ValueKind::kRef, type_info.type_index());
-        t = GetRefTypeName(
-            isolate, type,
-            type_info.instance().module_object().native_module());
-        v = StructProxy::Create(isolate, Handle<WasmStruct>::cast(ref),
-                                module_object);
+        Handle<WasmModuleObject> module(type_info.instance().module_object(),
+                                        isolate);
+        t = GetRefTypeName(isolate, type, module->native_module());
+        v = StructProxy::Create(isolate, Handle<WasmStruct>::cast(ref), module);
       } else if (ref->IsWasmArray()) {
         WasmTypeInfo type_info = ref->GetHeapObject().map().wasm_type_info();
         wasm::ValueType type = wasm::ValueType::FromIndex(
             wasm::ValueKind::kRef, type_info.type_index());
-        t = GetRefTypeName(
-            isolate, type,
-            type_info.instance().module_object().native_module());
-        v = ArrayProxy::Create(isolate, Handle<WasmArray>::cast(ref),
-                               module_object);
+        Handle<WasmModuleObject> module(type_info.instance().module_object(),
+                                        isolate);
+        t = GetRefTypeName(isolate, type, module->native_module());
+        v = ArrayProxy::Create(isolate, Handle<WasmArray>::cast(ref), module);
       } else if (ref->IsWasmInternalFunction()) {
-        v = handle(Handle<WasmInternalFunction>::cast(ref)->external(),
-                   isolate);
+        auto internal_fct = Handle<WasmInternalFunction>::cast(ref);
+        v = handle(internal_fct->external(), isolate);
+        // If the module is not provided by the caller, retrieve it from the
+        // instance object. If the function was created in JavaScript using
+        // `new WebAssembly.Function(...)`, a module for name resolution is not
+        // available.
+        if (module_object.is_null() &&
+            internal_fct->ref().IsWasmInstanceObject()) {
+          module_object = handle(
+              WasmInstanceObject::cast(internal_fct->ref()).module_object(),
+              isolate);
+        }
+        t = GetRefTypeName(isolate, value.type(), module_object);
       } else if (ref->IsJSFunction() || ref->IsSmi() || ref->IsNull() ||
                  ref->IsString() ||
-                 value.type().is_reference_to(wasm::HeapType::kExtern)) {
+                 value.type().is_reference_to(wasm::HeapType::kExtern) ||
+                 value.type().is_reference_to(wasm::HeapType::kAny)) {
+        t = GetRefTypeName(isolate, value.type(), module_object);
         v = ref;
       } else {
         // Fail gracefully.
         base::EmbeddedVector<char, 64> error;
         int len = SNPrintF(error, "unimplemented object type: %d",
                            HeapObject::cast(*ref).map().instance_type());
+        t = GetRefTypeName(isolate, value.type(), module_object);
         v = isolate->factory()->InternalizeString(error.SubVector(0, len));
       }
       break;
@@ -1037,8 +1060,11 @@ Handle<ArrayList> AddWasmTableObjectInternalProperties(
   for (int i = 0; i < length; ++i) {
     Handle<Object> entry = WasmTableObject::Get(isolate, table, i);
     wasm::WasmValue wasm_value(entry, table->type());
-    Handle<WasmModuleObject> module(
-        WasmInstanceObject::cast(table->instance()).module_object(), isolate);
+    Handle<WasmModuleObject> module;
+    if (table->instance().IsWasmInstanceObject()) {
+      module = Handle<WasmModuleObject>(
+          WasmInstanceObject::cast(table->instance()).module_object(), isolate);
+    }
     Handle<Object> debug_value =
         WasmValueObject::New(isolate, wasm_value, module);
     entries->set(i, *debug_value);

test/inspector/debugger/wasm-gc-anyref-expected.txt

@@ -4,18 +4,18 @@ Running test: test
 Calling instantiate function.
 Waiting for wasm script to be parsed.
 Got wasm script!
-Setting breakpoint
 Module instantiated.
+Tables populated.
+Setting breakpoint
 {
-    columnNumber : 138
+    columnNumber : 246
     lineNumber : 0
     scriptId : <scriptId>
 }
-Table populated.
 Paused:
-Script wasm://wasm/0e116a66 byte offset 138: Wasm opcode 0x01 (kExprNop)
+Script wasm://wasm/739f5f0a byte offset 246: Wasm opcode 0x01 (kExprNop)
 Scope:
-at $main (0:138):
+at $main (0:246):
  - scope (wasm-expression-stack):
    stack: 
  - scope (local):
@@ -24,11 +24,15 @@ at $main (0:138):
    $anyref_local_i31: null (anyref)
    $anyref_local_null: null (anyref)
  - scope (module):
-   instance: exports: "exported_ref_table" (Table), "fill_ref_table" (Function), "main" (Function)
+   instance: exports: "exported_ref_table" (Table), "exported_func_table" (Table), "fill_tables" (Function), "main" (Function)
    module: Module
-   functions: "$fill_ref_table": (Function), "$main": (Function)
+   functions: "$my_func": (Function), "$fill_tables": (Function), "$main": (Function)
+   globals: "$global0": function $my_func() { [native code] } (funcref)
    tables: 
+      $import.any_table: 0: Array(2) (anyref), 1: Struct ((ref $type0)), 2: undefined (anyref)
+      $import.func_table: 0: function () { [native code] } (funcref), 1: function $my_func() { [native code] } (funcref), 2: undefined (funcref)
       $exported_ref_table: 0: Struct ((ref $type0)), 1: Array ((ref $type1)), 2: undefined (anyref), 3: undefined (anyref)
+      $exported_func_table: 0: function external_fct() { [native code] } (funcref), 1: function $my_func() { [native code] } (funcref), 2: undefined (funcref)
 at (anonymous) (0:17):
  - scope (global):
    -- skipped globals

test/inspector/debugger/wasm-gc-anyref.js

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --experimental-wasm-gc
+// Flags: --experimental-wasm-gc --experimental-wasm-typed-funcref
+// Flags: --experimental-wasm-type-reflection
 
 utils.load('test/inspector/wasm-inspector-test.js');
 
@@ -17,8 +18,9 @@ let breakpointLocation = -1;
 
 InspectorTest.runAsyncTestSuite([
   async function test() {
-    instantiateWasm();
+    let wasm_promise = instantiateWasm();
     let scriptIds = await waitForWasmScripts();
+    await wasm_promise;  // Make sure the instantiation is finished.
 
     // Set a breakpoint.
     InspectorTest.log('Setting breakpoint');
@@ -66,10 +68,20 @@ async function instantiateWasm() {
   var builder = new WasmModuleBuilder();
   let struct_type = builder.addStruct([makeField(kWasmI32, false)]);
   let array_type = builder.addArray(kWasmI32);
+  let imported_ref_table =
+      builder.addImportedTable('import', 'any_table', 3, 3, kWasmAnyRef);
+  let imported_func_table =
+      builder.addImportedTable('import', 'func_table', 3, 3, kWasmFuncRef);
   let ref_table = builder.addTable(kWasmAnyRef, 4)
                          .exportAs('exported_ref_table');
+  let func_table = builder.addTable(kWasmFuncRef, 3)
+                         .exportAs('exported_func_table');
 
-  builder.addFunction('fill_ref_table', kSig_v_v)
+  let func = builder.addFunction('my_func', kSig_v_v).addBody([kExprNop]);
+  // Make the function "declared".
+  builder.addGlobal(kWasmFuncRef, false, [kExprRefFunc, func.index]);
+
+  builder.addFunction('fill_tables', kSig_v_v)
     .addBody([
       ...wasmI32Const(0), ...wasmI32Const(123),
       kGCPrefix, kExprStructNew, struct_type, kExprTableSet, ref_table.index,
@@ -83,6 +95,21 @@ async function instantiateWasm() {
       // apart.
       // ...wasmI32Const(2), ...wasmI32Const(30),
       // kGCPrefix, kExprI31New, kExprTableSet, ref_table.index,
+
+      // Fill imported any table.
+      ...wasmI32Const(1),
+      ...wasmI32Const(123), kGCPrefix, kExprStructNew, struct_type,
+      kExprTableSet, imported_ref_table,
+
+      // Fill imported func table.
+      ...wasmI32Const(1),
+      kExprRefFunc, func.index,
+      kExprTableSet, imported_func_table,
+
+      // Fill func table.
+      ...wasmI32Const(1),
+      kExprRefFunc, func.index,
+      kExprTableSet, func_table.index,
     ]).exportFunc();
 
   let body = [
@@ -114,11 +141,32 @@ async function instantiateWasm() {
   breakpointLocation = main.body_offset + body.length - 1;
 
   InspectorTest.log('Calling instantiate function.');
-  await WasmInspectorTest.instantiate(module_bytes);
+  let imports = `{'import' : {
+      'any_table': (() => {
+        let js_table =
+            new WebAssembly.Table({element: 'anyref', initial: 3, maximum: 3});
+        js_table.set(0, ['JavaScript', 'value']);
+        return js_table;
+      })(),
+      'func_table': (() => {
+        let func_table =
+            new WebAssembly.Table({element: 'anyfunc', initial: 3, maximum: 3});
+        func_table.set(0, new WebAssembly.Function(
+          {parameters:['i32', 'i32'], results: ['i32']},
+          function /*anonymous*/ (a, b) { return a * b; }));
+        return func_table;
+      })(),
+    }}`;
+  await WasmInspectorTest.instantiate(module_bytes, 'instance', imports);
   InspectorTest.log('Module instantiated.');
   await WasmInspectorTest.evalWithUrl(
-      'instance.exports.fill_ref_table()', 'fill_ref_table');
-  InspectorTest.log('Table populated.');
+    'instance.exports.fill_tables();', 'fill_tables');
+  await WasmInspectorTest.evalWithUrl(
+      `instance.exports.exported_func_table.set(0, new WebAssembly.Function(
+          {parameters:['i32', 'i32'], results: ['i32']},
+          function external_fct(a, b) { return a * b; }))`,
+      'add_func_to_table');
+  InspectorTest.log('Tables populated.');
 }
 
 async function waitForWasmScripts() {

test/unittests/runtime/runtime-debug-unittest.cc

@@ -7,6 +7,7 @@
 #include "include/v8-object.h"
 #include "include/v8-template.h"
 #include "src/api/api.h"
+#include "src/objects/js-array-inl.h"
 #include "src/objects/objects-inl.h"
 #include "src/runtime/runtime.h"
 #include "test/unittests/test-utils.h"
@@ -56,6 +57,27 @@ TEST_F(RuntimeTest, DoesNotReturnPrototypeWhenInacessible) {
   EXPECT_EQ(0u, result->Length());
 }
 
+#if V8_ENABLE_WEBASSEMBLY
+TEST_F(RuntimeTest, WasmTableWithoutInstance) {
+  uint32_t initial = 1u;
+  bool has_maximum = false;
+  uint32_t maximum = std::numeric_limits<uint32_t>::max();
+  Handle<FixedArray> elements;
+  Handle<WasmTableObject> table = WasmTableObject::New(
+      i_isolate(), Handle<WasmInstanceObject>(), wasm::kWasmAnyRef, initial,
+      has_maximum, maximum, &elements, i_isolate()->factory()->null_value());
+  MaybeHandle<JSArray> result =
+      Runtime::GetInternalProperties(i_isolate(), table);
+  ASSERT_FALSE(result.is_null());
+  // ["[[Prototype]]", <map>, "[[Entries]]", <entries>]
+  ASSERT_EQ(4, result.ToHandleChecked()->elements().length());
+  Handle<Object> entries =
+      FixedArrayBase::GetElement(i_isolate(), result.ToHandleChecked(), 3)
+          .ToHandleChecked();
+  EXPECT_EQ(1, JSArray::cast(*entries).elements().length());
+}
+#endif
+
 }  // namespace
 }  // namespace internal
 }  // namespace v8