[wasm] Fix location for error in asm.js ToNumber conversion

src/isolate.cc

 // Copyright 2012 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/isolate.h"
 
 #include <stdlib.h>
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
@@ skipping 505 matching lines @@
         const int wasm_function_index = wasm_frame->function_index();
         Code* code = wasm_frame->unchecked_code();
         Handle<AbstractCode> abstract_code(AbstractCode::cast(code), this);
         const int offset =
             static_cast<int>(wasm_frame->pc() - code->instruction_start());
 
         // TODO(wasm): The wasm object returned by the WasmFrame should always
         //             be a wasm object.
         DCHECK(wasm::IsWasmInstance(*instance) || instance->IsUndefined(this));
 
-        int flags = wasm::WasmIsAsmJs(*instance, this)
-                        ? FrameArray::kIsAsmJsWasmFrame
-                        : FrameArray::kIsWasmFrame;
+        int flags = 0;
+        if (wasm::WasmIsAsmJs(*instance, this)) {
+          flags |= FrameArray::kIsAsmJsWasmFrame;
+          if (wasm_frame->at_to_number_conversion()) {
+            flags |= FrameArray::kAsmJsAtNumberConversion;
+          }
+        } else {
+          flags |= FrameArray::kIsWasmFrame;
+        }
 
         elements =
             FrameArray::AppendWasmFrame(elements, instance, wasm_function_index,
                                         abstract_code, offset, flags);
       } break;
 
       default:
         break;
     }
   }
@@ skipping 1012 matching lines @@
       continue;
     }
 
     if (elements->IsAsmJsWasmFrame(i)) {
       Handle<WasmCompiledModule> compiled_module(
           WasmInstanceObject::cast(elements->WasmInstance(i))
               ->get_compiled_module());
       int func_index = elements->WasmFunctionIndex(i)->value();
       int code_offset = elements->Offset(i)->value();
       int byte_pos = elements->Code(i)->SourcePosition(code_offset);
+      bool at_tonumber_conversion =
+          elements->Flags(i)->value() & FrameArray::kAsmJsAtNumberConversion;
       int source_pos = WasmCompiledModule::GetAsmJsSourcePosition(
-          compiled_module, func_index, byte_pos);
+          compiled_module, func_index, byte_pos, at_tonumber_conversion);
       Handle<Script> script = compiled_module->script();
 
       *target = MessageLocation(script, source_pos, source_pos + 1);
       return true;
     }
 
     Handle<JSFunction> fun = handle(elements->Function(i), this);
     if (!fun->shared()->IsSubjectToDebugging()) continue;
 
     Object* script = fun->shared()->script();
@@ skipping 1964 matching lines @@
   // Then check whether this scope intercepts.
   if ((flag & intercept_mask_)) {
     intercepted_flags_ |= flag;
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8