[inspector] Introduce translation of wasm frames

src/api.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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 8892 matching lines @@
 int DebugInterface::Script::LineOffset() const {
   return Utils::OpenHandle(this)->line_offset();
 }
 
 int DebugInterface::Script::ColumnOffset() const {
   return Utils::OpenHandle(this)->column_offset();
 }
 
 std::vector<int> DebugInterface::Script::LineEnds() const {
   i::Handle<i::Script> script = Utils::OpenHandle(this);
+  if (script->type() == i::Script::TYPE_WASM) return std::vector<int>();
   i::Isolate* isolate = script->GetIsolate();
   i::HandleScope scope(isolate);
   i::Script::InitLineEnds(script);
   CHECK(script->line_ends()->IsFixedArray());
   i::Handle<i::FixedArray> line_ends(i::FixedArray::cast(script->line_ends()));
   std::vector<int> result(line_ends->length());
   for (int i = 0; i < line_ends->length(); ++i) {
     i::Smi* line_end = i::Smi::cast(line_ends->get(i));
     result[i] = line_end->value();
   }
@@ skipping 43 matching lines @@
 MaybeLocal<String> DebugInterface::Script::Source() const {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   i::HandleScope handle_scope(isolate);
   i::Handle<i::Script> script = Utils::OpenHandle(this);
   i::Handle<i::Object> value(script->source(), isolate);
   if (!value->IsString()) return MaybeLocal<String>();
   return Utils::ToLocal(
       handle_scope.CloseAndEscape(i::Handle<i::String>::cast(value)));
 }
 
+bool DebugInterface::Script::IsWasm() const {
+  return Utils::OpenHandle(this)->type() == i::Script::TYPE_WASM;
+}
+
 namespace {
 int GetSmiValue(i::Handle<i::FixedArray> array, int index) {
   return i::Smi::cast(array->get(index))->value();
 }
 }  // namespace
 
 bool DebugInterface::Script::GetPossibleBreakpoints(
     const Location& start, const Location& end,
     std::vector<Location>* locations) const {
   CHECK(!start.IsEmpty());
   i::Handle<i::Script> script = Utils::OpenHandle(this);
+  if (script->type() == i::Script::TYPE_WASM) {
+    // TODO(clemensh): Return the proper thing once we support wasm breakpoints.
+    return false;
+  }
 
   i::Script::InitLineEnds(script);
   CHECK(script->line_ends()->IsFixedArray());
   i::Isolate* isolate = script->GetIsolate();
   i::Handle<i::FixedArray> line_ends =
       i::Handle<i::FixedArray>::cast(i::handle(script->line_ends(), isolate));
   CHECK(line_ends->length());
 
   int start_offset = GetSourcePosition(start);
   int end_offset;
@@ skipping 25 matching lines @@
     locations->push_back(Location(
         current_line_end_index + script->line_offset(),
         offset - line_offset +
             (current_line_end_index == 0 ? script->column_offset() : 0)));
   }
   return true;
 }
 
 int DebugInterface::Script::GetSourcePosition(const Location& location) const {
   i::Handle<i::Script> script = Utils::OpenHandle(this);
+  if (script->type() == i::Script::TYPE_WASM) {
+    // TODO(clemensh): Return the proper thing for wasm.
+    return 0;
+  }
 
   int line = std::max(location.GetLineNumber() - script->line_offset(), 0);
   int column = location.GetColumnNumber();
   if (line == 0) {
     column = std::max(0, column - script->column_offset());
   }
 
   i::Script::InitLineEnds(script);
   CHECK(script->line_ends()->IsFixedArray());
   i::Handle<i::FixedArray> line_ends = i::Handle<i::FixedArray>::cast(
@@ skipping 13 matching lines @@
   ENTER_V8(isolate);
   i::HandleScope handle_scope(isolate);
   i::Handle<i::JSReceiver> script_receiver(Utils::OpenHandle(*script));
   if (!script_receiver->IsJSValue()) return MaybeLocal<Script>();
   i::Handle<i::Object> script_value(
       i::Handle<i::JSValue>::cast(script_receiver)->value(), isolate);
   if (!script_value->IsScript()) {
     return MaybeLocal<Script>();
   }
   i::Handle<i::Script> script_obj = i::Handle<i::Script>::cast(script_value);
-  if (script_obj->type() != i::Script::TYPE_NORMAL) return MaybeLocal<Script>();
+  if (script_obj->type() != i::Script::TYPE_NORMAL &&
+      script_obj->type() != i::Script::TYPE_WASM) {
+    return MaybeLocal<Script>();
+  }
   return ToApiHandle<DebugInterface::Script>(
       handle_scope.CloseAndEscape(script_obj));
 }
 
 DebugInterface::Location::Location(int lineNumber, int columnNumber)
     : lineNumber_(lineNumber), columnNumber_(columnNumber) {
   CHECK(lineNumber >= 0);
   CHECK(columnNumber >= 0);
 }
 
@@ skipping 29 matching lines @@
       if (script->type() != i::Script::TYPE_NORMAL) continue;
       if (script->HasValidSource()) {
         i::HandleScope handle_scope(isolate);
         i::Handle<i::Script> script_handle(script, isolate);
         scripts.Append(ToApiHandle<Script>(script_handle));
       }
     }
   }
 }
 
+std::pair<std::string, std::vector<std::tuple<uint32_t, int, int>>>
+DebugInterface::DisassembleWasmFunction(Isolate* v8_isolate,
+                                        Local<Object> v8_script,
+                                        int function_index) {
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
+  if (v8_script.IsEmpty()) return {};
+  i::Handle<i::Object> script_wrapper = Utils::OpenHandle(*v8_script);
+  if (!script_wrapper->IsJSValue()) return {};
+  i::Handle<i::Object> script_obj(
+      i::Handle<i::JSValue>::cast(script_wrapper)->value(), isolate);
+  if (!script_obj->IsScript()) return {};
+  i::Handle<i::Script> script = i::Handle<i::Script>::cast(script_obj);
+  if (script->type() != i::Script::TYPE_WASM) return {};
+  i::Handle<i::WasmCompiledModule> compiled_module(
+      i::WasmCompiledModule::cast(script->wasm_compiled_module()), isolate);
+  return i::wasm::DisassembleFunction(compiled_module, function_index);
+}
+
 Local<String> CpuProfileNode::GetFunctionName() const {
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
   i::Isolate* isolate = node->isolate();
   const i::CodeEntry* entry = node->entry();
   i::Handle<i::String> name =
       isolate->factory()->InternalizeUtf8String(entry->name());
   if (!entry->has_name_prefix()) {
     return ToApiHandle<String>(name);
   } else {
     // We do not expect this to fail. Change this if it does.
@@ skipping 668 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8