[wasm] Implement frame inspection for interpreted frames

src/debug/debug.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/debug/debug.h"
 
 #include <memory>
 
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 2299 matching lines @@
 
   // Notify the debug event listeners. Indicate auto continue if the break was
   // a debug command break.
   OnDebugBreak(isolate_->factory()->undefined_value(), debug_command_only);
 }
 
 #ifdef DEBUG
 void Debug::PrintBreakLocation() {
   if (!FLAG_print_break_location) return;
   HandleScope scope(isolate_);
-  JavaScriptFrameIterator iterator(isolate_);
+  StackTraceFrameIterator iterator(isolate_);
   if (iterator.done()) return;
-  JavaScriptFrame* frame = iterator.frame();
+  StandardFrame* frame = iterator.frame();
   FrameSummary summary = FrameSummary::GetTop(frame);
   int source_position = summary.SourcePosition();
   Handle<Object> script_obj = summary.script();
   PrintF("[debug] break in function '");
   summary.FunctionName()->PrintOn(stdout);
   PrintF("'.\n");
   if (script_obj->IsScript()) {
     Handle<Script> script = Handle<Script>::cast(script_obj);
     Handle<String> source(String::cast(script->source()));
     Script::InitLineEnds(script);
@@ skipping 32 matching lines @@
 
   // Store the previous break id, frame id and return value.
   break_id_ = debug_->break_id();
   break_frame_id_ = debug_->break_frame_id();
   return_value_ = debug_->return_value();
 
   // Create the new break info. If there is no proper frames there is no break
   // frame id.
   StackTraceFrameIterator it(isolate());
   bool has_frames = !it.done();
-  // We don't currently support breaking inside wasm framess.
-  DCHECK(!has_frames || !it.is_wasm());
   debug_->thread_local_.break_frame_id_ =
       has_frames ? it.frame()->id() : StackFrame::NO_ID;
   debug_->SetNextBreakId();
 
   debug_->UpdateState();
   // Make sure that debugger is loaded and enter the debugger context.
   // The previous context is kept in save_.
   failed_ = !debug_->is_loaded();
   if (!failed_) isolate()->set_context(*debug->debug_context());
 }
@@ skipping 280 matching lines @@
   logger_->DebugEvent("Put", message.text());
 }
 
 void LockingCommandMessageQueue::Clear() {
   base::LockGuard<base::Mutex> lock_guard(&mutex_);
   queue_.Clear();
 }
 
 }  // namespace internal
 }  // namespace v8