[wasm] Instantiate interpreter for testing directly

Avoid going through the {WasmDebugInfo}, which existed for debugging in
the interpreter in production. Instead, tests now instantiate the
interpreter directly.

This will unblock the removal of the whole {WasmDebugInfo}, and finally
moving the interpreter to the test directory.

R=ahaas@chromium.org

Bug: v8:10389
Change-Id: I8ae76a1d5bff716c129781b11a15369a80b13603
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2235543
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68258}

src/wasm/wasm-debug.cc

@@ -1024,21 +1024,6 @@ Handle<WasmDebugInfo> WasmDebugInfo::New(Handle<WasmInstanceObject> instance) {
   return debug_info;
 }
 
-wasm::WasmInterpreter* WasmDebugInfo::SetupForTesting(
-    Handle<WasmInstanceObject> instance_obj) {
-  Handle<WasmDebugInfo> debug_info = WasmDebugInfo::New(instance_obj);
-  Isolate* isolate = instance_obj->GetIsolate();
-  // Use the maximum stack size to estimate the maximum size of the interpreter.
-  // The interpreter keeps its own stack internally, and the size of the stack
-  // should dominate the overall size of the interpreter. We multiply by '2' to
-  // account for the growing strategy for the backing store of the stack.
-  size_t interpreter_size = FLAG_stack_size * KB * 2;
-  auto interp_handle = Managed<wasm::InterpreterHandle>::Allocate(
-      isolate, interpreter_size, isolate, debug_info);
-  debug_info->set_interpreter_handle(*interp_handle);
-  return interp_handle->raw()->interpreter();
-}
-
 // static
 Handle<Code> WasmDebugInfo::GetCWasmEntry(Handle<WasmDebugInfo> debug_info,
                                           const wasm::FunctionSig* sig) {

src/wasm/wasm-objects.h

@@ -840,13 +840,6 @@ class WasmDebugInfo : public Struct {
 
   static Handle<WasmDebugInfo> New(Handle<WasmInstanceObject>);
 
-  // Setup a WasmDebugInfo with an existing WasmInstance struct.
-  // Returns a pointer to the interpreter instantiated inside this
-  // WasmDebugInfo.
-  // Use for testing only.
-  V8_EXPORT_PRIVATE static wasm::WasmInterpreter* SetupForTesting(
-      Handle<WasmInstanceObject>);
-
   V8_EXPORT_PRIVATE static Handle<Code> GetCWasmEntry(Handle<WasmDebugInfo>,
                                                       const wasm::FunctionSig*);
 

test/cctest/wasm/wasm-run-utils.cc

@@ -67,7 +67,9 @@ TestingModuleBuilder::TestingModuleBuilder(
   }
 
   if (tier == ExecutionTier::kInterpreter) {
-    interpreter_ = WasmDebugInfo::SetupForTesting(instance_object_);
+    interpreter_ = std::make_unique<WasmInterpreter>(
+        isolate_, test_module_ptr_,
+        ModuleWireBytes{native_module_->wire_bytes()}, instance_object_);
   }
 }
 

test/cctest/wasm/wasm-run-utils.h

@@ -204,7 +204,7 @@ class TestingModuleBuilder {
     return &test_module_->functions[index];
   }
 
-  WasmInterpreter* interpreter() const { return interpreter_; }
+  WasmInterpreter* interpreter() const { return interpreter_.get(); }
   bool interpret() const { return interpreter_ != nullptr; }
   LowerSimd lower_simd() const { return lower_simd_; }
   Isolate* isolate() const { return isolate_; }
@@ -243,7 +243,7 @@ class TestingModuleBuilder {
   byte* mem_start_ = nullptr;
   uint32_t mem_size_ = 0;
   alignas(16) byte globals_data_[kMaxGlobalsSize];
-  WasmInterpreter* interpreter_ = nullptr;
+  std::unique_ptr<WasmInterpreter> interpreter_;
   ExecutionTier execution_tier_;
   Handle<WasmInstanceObject> instance_object_;
   NativeModule* native_module_ = nullptr;

test/common/wasm/wasm-module-runner.cc

@@ -126,12 +126,13 @@ bool InterpretWasmModuleForTesting(Isolate* isolate,
 
   Zone zone(isolate->allocator(), ZONE_NAME);
 
-  WasmInterpreter* interpreter = WasmDebugInfo::SetupForTesting(instance);
-  interpreter->Reset();
-
-  interpreter->InitFrame(&instance->module()->functions[function_index],
+  WasmInterpreter interpreter{
+      isolate, instance->module(),
+      ModuleWireBytes{instance->module_object().native_module()->wire_bytes()},
+      instance};
+  interpreter.InitFrame(&instance->module()->functions[function_index],
                         arguments.get());
-  WasmInterpreter::State interpreter_result = interpreter->Run(kMaxNumSteps);
+  WasmInterpreter::State interpreter_result = interpreter.Run(kMaxNumSteps);
 
   if (isolate->has_pending_exception()) {
     // Stack overflow during interpretation.
@@ -197,26 +198,27 @@ WasmInterpretationResult InterpretWasmModule(
   Zone zone(isolate->allocator(), ZONE_NAME);
   v8::internal::HandleScope scope(isolate);
 
-  WasmInterpreter* interpreter = WasmDebugInfo::SetupForTesting(instance);
-  interpreter->Reset();
-
-  interpreter->InitFrame(&instance->module()->functions[function_index], args);
-  WasmInterpreter::State interpreter_result = interpreter->Run(kMaxNumSteps);
+  WasmInterpreter interpreter{
+      isolate, instance->module(),
+      ModuleWireBytes{instance->module_object().native_module()->wire_bytes()},
+      instance};
+  interpreter.InitFrame(&instance->module()->functions[function_index], args);
+  WasmInterpreter::State interpreter_result = interpreter.Run(kMaxNumSteps);
 
   bool stack_overflow = isolate->has_pending_exception();
   isolate->clear_pending_exception();
 
   if (stack_overflow) return WasmInterpretationResult::Stopped();
 
-  if (interpreter->state() == WasmInterpreter::TRAPPED) {
+  if (interpreter.state() == WasmInterpreter::TRAPPED) {
     return WasmInterpretationResult::Trapped(
-        interpreter->PossibleNondeterminism());
+        interpreter.PossibleNondeterminism());
   }
 
   if (interpreter_result == WasmInterpreter::FINISHED) {
     return WasmInterpretationResult::Finished(
-        interpreter->GetReturnValue().to<int32_t>(),
-        interpreter->PossibleNondeterminism());
+        interpreter.GetReturnValue().to<int32_t>(),
+        interpreter.PossibleNondeterminism());
   }
 
   return WasmInterpretationResult::Stopped();