[wasm] Implement frame inspection for interpreted frames

src/debug/debug.cc

Index: src/debug/debug.cc
diff --git a/src/debug/debug.cc b/src/debug/debug.cc
index f6f652edf259c2300b7fa7acf3dd49b349b14181..c067a6b1051083e799dbeef48534ecd6a074416c 100644
--- a/src/debug/debug.cc
+++ b/src/debug/debug.cc
@@ -60,8 +60,12 @@ Debug::Debug(Isolate* isolate)
 }
 
 BreakLocation BreakLocation::FromFrame(StandardFrame* frame) {
-  // TODO(clemensh): Handle Wasm frames.
-  DCHECK(!frame->is_wasm());
+  if (frame->is_wasm()) {
+    WasmInterpreterEntryFrame* wasm_frame =
+        WasmInterpreterEntryFrame::cast(frame);
+    return wasm_frame->wasm_instance()->compiled_module()->GetBreakLocation(
+        wasm_frame->position());
+  }
 
   auto summary = FrameSummary::GetFirst(frame).AsJavaScript();
   int offset = summary.code_offset();
@@ -2330,8 +2334,6 @@ DebugScope::DebugScope(Debug* debug)
   // 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();