[wasm] Allocate a single script per wasm module

src/runtime/runtime-debug.cc

 // Copyright 2014 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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/debug/debug-evaluate.h"
 #include "src/debug/debug-frames.h"
 #include "src/debug/debug-scopes.h"
@@ skipping 534 matching lines @@
   if (it.is_wasm()) {
     // Create the details array (no dynamic information for wasm).
     Handle<FixedArray> details =
         isolate->factory()->NewFixedArray(kFrameDetailsFirstDynamicIndex);
 
     // Add the frame id.
     details->set(kFrameDetailsFrameIdIndex, *frame_id);
 
     // Add the function name.
     Handle<Object> wasm_instance(it.wasm_frame()->wasm_instance(), isolate);
+    Handle<wasm::WasmCompiledModule> compiled_module(
+        wasm::GetCompiledModule(*wasm_instance), isolate);
     int func_index = it.wasm_frame()->function_index();
     Handle<String> func_name =
-        wasm::GetWasmFunctionName(isolate, wasm_instance, func_index);
+        wasm::GetWasmFunctionName(isolate, compiled_module, func_index);
     details->set(kFrameDetailsFunctionIndex, *func_name);
 
     // Add the script wrapper
     Handle<Object> script_wrapper =
         Script::GetWrapper(frame_inspector.GetScript());
     details->set(kFrameDetailsScriptIndex, *script_wrapper);
 
     // Add the arguments count.
     details->set(kFrameDetailsArgumentCountIndex, Smi::kZero);
 
     // Add the locals count
     details->set(kFrameDetailsLocalCountIndex, Smi::kZero);
 
     // Add the source position.
+    // For wasm, it is function-local, so translate it to a module-relative
+    // position, such that together with the script it uniquely identifies the
+    // position.
+    Handle<Object> positionValue;
     if (position != kNoSourcePosition) {
-      details->set(kFrameDetailsSourcePositionIndex, Smi::FromInt(position));
+      int translated_position = position;
+      if (!wasm::WasmIsAsmJs(*wasm_instance, isolate)) {
+        Handle<wasm::WasmCompiledModule> compiled_module(
+            wasm::GetCompiledModule(JSObject::cast(*wasm_instance)), isolate);
+        translated_position +=
+            wasm::GetFunctionCodeOffset(compiled_module, func_index);
+      }
+      details->set(kFrameDetailsSourcePositionIndex,
+                   Smi::FromInt(translated_position));
     }
 
     // Add the constructor information.
     details->set(kFrameDetailsConstructCallIndex, heap->ToBoolean(false));
 
     // Add the at return information.
     details->set(kFrameDetailsAtReturnIndex, heap->ToBoolean(false));
 
     // Add flags to indicate information on whether this frame is
     //   bit 0: invoked in the debugger context.
@@ skipping 1306 matching lines @@
   SealHandleScope shs(isolate);
   return Smi::FromInt(isolate->debug()->is_active());
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugBreakInOptimizedCode) {
   UNIMPLEMENTED();
   return NULL;
 }
 
-// TODO(5530): Remove once uses in debug.js are gone.
-RUNTIME_FUNCTION(Runtime_GetWasmFunctionOffsetTable) {
-  DCHECK(args.length() == 1);
-  HandleScope scope(isolate);
-  CONVERT_ARG_CHECKED(JSValue, script_val, 0);
-
-  CHECK(script_val->value()->IsScript());
-  Handle<Script> script = Handle<Script>(Script::cast(script_val->value()));
-
-  Handle<wasm::WasmDebugInfo> debug_info =
-      wasm::GetDebugInfo(handle(script->wasm_instance(), isolate));
-  Handle<FixedArray> elements = wasm::WasmDebugInfo::GetFunctionOffsetTable(
-      debug_info, script->wasm_function_index());
-  return *isolate->factory()->NewJSArrayWithElements(elements);
-}
-
-// TODO(5530): Remove once uses in debug.js are gone.
-RUNTIME_FUNCTION(Runtime_DisassembleWasmFunction) {
-  DCHECK(args.length() == 1);
-  HandleScope scope(isolate);
-  CONVERT_ARG_CHECKED(JSValue, script_val, 0);
-
-  CHECK(script_val->value()->IsScript());
-  Handle<Script> script = Handle<Script>(Script::cast(script_val->value()));
-
-  Handle<wasm::WasmDebugInfo> debug_info =
-      wasm::GetDebugInfo(handle(script->wasm_instance(), isolate));
-  return *wasm::WasmDebugInfo::DisassembleFunction(
-      debug_info, script->wasm_function_index());
-}
-
 }  // namespace internal
 }  // namespace v8