[wasm] Indirect calls without function table cause validation errors.

src/compiler/wasm-compiler.cc

 // Copyright 2015 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.
 
 #include "src/compiler/wasm-compiler.h"
 
 #include <memory>
 
 #include "src/isolate-inl.h"
 
@@ skipping 2150 matching lines @@
 Node* WasmGraphBuilder::CallIndirect(uint32_t sig_index, Node** args,
                                      Node*** rets,
                                      wasm::WasmCodePosition position) {
   DCHECK_NOT_NULL(args[0]);
   DCHECK(module_ && module_->instance);
 
   // Assume only one table for now.
   uint32_t table_index = 0;
   wasm::FunctionSig* sig = module_->GetSignature(sig_index);
 
-  if (!module_->IsValidTable(table_index)) {
-    // No function table. Generate a trap and return a constant.
-    trap_->AddTrapIfFalse(wasm::kTrapFuncInvalid, Int32Constant(0), position);
-    (*rets) = Buffer(sig->return_count());
-    for (size_t i = 0; i < sig->return_count(); i++) {
-      (*rets)[i] = trap_->GetTrapValue(sig->GetReturn(i));
-    }
-    return trap_->GetTrapValue(sig);
-  }
+  DCHECK(module_->IsValidTable(table_index));
 
   EnsureFunctionTableNodes();
   MachineOperatorBuilder* machine = jsgraph()->machine();
   Node* key = args[0];
 
   // Bounds check against the table size.
   Node* size = function_table_sizes_[table_index];
   Node* in_bounds = graph()->NewNode(machine->Uint32LessThan(), key, size);
   trap_->AddTrapIfFalse(wasm::kTrapFuncInvalid, in_bounds, position);
   Node* table = function_tables_[table_index];
@@ skipping 1295 matching lines @@
                             function_->code_start_offset),
            compile_ms);
   }
 
   return code;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8