[wasm] Enable wasm frame inspection for debugging

src/frames.cc

Index: src/frames.cc
diff --git a/src/frames.cc b/src/frames.cc
index ba9ec7913a519d7317c2500a83cc4d31c677318a..4c9c3a487f9be7fd410aba24b72f2a01c299ad5c 100644
--- a/src/frames.cc
+++ b/src/frames.cc
@@ -16,6 +16,7 @@
 #include "src/safepoint-table.h"
 #include "src/string-stream.h"
 #include "src/vm-state-inl.h"
+#include "src/wasm/wasm-module.h"
 
 namespace v8 {
 namespace internal {
@@ -63,19 +64,14 @@ StackFrameIteratorBase::StackFrameIteratorBase(Isolate* isolate,
 }
 #undef INITIALIZE_SINGLETON
 
-
 StackFrameIterator::StackFrameIterator(Isolate* isolate)
-    : StackFrameIteratorBase(isolate, true) {
-  Reset(isolate->thread_local_top());
-}
-
+    : StackFrameIterator(isolate, isolate->thread_local_top()) {}
 
 StackFrameIterator::StackFrameIterator(Isolate* isolate, ThreadLocalTop* t)
     : StackFrameIteratorBase(isolate, true) {
   Reset(t);
 }
 
-
 void StackFrameIterator::Advance() {
   DCHECK(!done());
   // Compute the state of the calling frame before restoring
@@ -165,6 +161,11 @@ StackTraceFrameIterator::StackTraceFrameIterator(Isolate* isolate)
   if (!done() && !IsValidFrame(iterator_.frame())) Advance();
 }
 
+StackTraceFrameIterator::StackTraceFrameIterator(Isolate* isolate,
+                                                 StackFrame::Id id)
+    : StackTraceFrameIterator(isolate) {
+  while (!done() && frame()->id() != id) Advance();
+}
 
 void StackTraceFrameIterator::Advance() {
   do {
@@ -185,6 +186,11 @@ bool StackTraceFrameIterator::IsValidFrame(StackFrame* frame) const {
   return frame->is_wasm();
 }
 
+void StackTraceFrameIterator::AdvanceToArgumentsFrame() {
+  if (!is_javascript() || !javascript_frame()->has_adapted_arguments()) return;
+  iterator_.Advance();
+  DCHECK(iterator_.frame()->is_arguments_adaptor());
+}
 
 // -------------------------------------------------------------------------
 
@@ -1339,23 +1345,16 @@ Address WasmFrame::GetCallerStackPointer() const {
   return fp() + ExitFrameConstants::kCallerSPOffset;
 }
 
-Object* WasmFrame::wasm_obj() {
+Object* WasmFrame::wasm_obj() const {
   FixedArray* deopt_data = LookupCode()->deoptimization_data();
   DCHECK(deopt_data->length() == 2);
   return deopt_data->get(0);
 }
 
-uint32_t WasmFrame::function_index() {
+uint32_t WasmFrame::function_index() const {
   FixedArray* deopt_data = LookupCode()->deoptimization_data();
   DCHECK(deopt_data->length() == 2);
-  Object* func_index_obj = deopt_data->get(1);
-  if (func_index_obj->IsUndefined(isolate())) return static_cast<uint32_t>(-1);
-  if (func_index_obj->IsSmi()) return Smi::cast(func_index_obj)->value();
-  DCHECK(func_index_obj->IsHeapNumber());
-  uint32_t val = static_cast<uint32_t>(-1);
-  func_index_obj->ToUint32(&val);
-  DCHECK(val != static_cast<uint32_t>(-1));
-  return val;
+  return Smi::cast(deopt_data->get(1))->value();
 }
 
 namespace {