[wasm] prototype for breakpoint support.

src/debug/debug.h

 // 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.
 
 #ifndef V8_DEBUG_DEBUG_H_
 #define V8_DEBUG_DEBUG_H_
 
 #include "src/allocation.h"
 #include "src/arguments.h"
 #include "src/assembler.h"
 #include "src/base/atomicops.h"
 #include "src/base/hashmap.h"
 #include "src/base/platform/platform.h"
 #include "src/debug/liveedit.h"
 #include "src/execution.h"
 #include "src/factory.h"
 #include "src/flags.h"
 #include "src/frames.h"
 #include "src/interpreter/source-position-table.h"
 #include "src/runtime/runtime.h"
 #include "src/string-stream.h"
 #include "src/v8threads.h"
+#include "src/wasm/wasm-debug.h"
 
 #include "include/v8-debug.h"
 
 namespace v8 {
 namespace internal {
 
 
 // Forward declarations.
 class DebugScope;
 
@@ skipping 28 matching lines @@
   BREAK_POSITION_ALIGNED = 1
 };
 
 
 class BreakLocation {
  public:
   // Find the break point at the supplied address, or the closest one before
   // the address.
   static BreakLocation FromCodeOffset(Handle<DebugInfo> debug_info, int offset);
 
-  static BreakLocation FromFrame(Handle<DebugInfo> debug_info,
-                                 JavaScriptFrame* frame);
+  static BreakLocation FromFrame(StandardFrame* frame);
 
   static void AllForStatementPosition(Handle<DebugInfo> debug_info,
                                       int statement_position,
                                       List<BreakLocation>* result_out);
 
   static BreakLocation FromPosition(Handle<DebugInfo> debug_info, int position,
                                     BreakPositionAlignment alignment);
 
   bool IsDebugBreak() const;
 
@@ skipping 113 matching lines @@
 
    private:
     DebugBreakType GetDebugBreakType();
 
     interpreter::SourcePositionTableIterator source_position_iterator_;
     BreakLocatorType break_locator_type_;
     int start_position_;
     DISALLOW_COPY_AND_ASSIGN(BytecodeArrayIterator);
   };
 
+  class WasmBytecodeIterator : public Iterator {
+   public:
+    WasmBytecodeIterator(Handle<DebugInfo> debug_info, BreakLocatorType type);
+    ~WasmBytecodeIterator() override {}
+
+    BreakLocation GetBreakLocation() override;
+    bool Done() const override { return wasm_insn_iterator.Done(); }
+    void Next() override;
+    int code_offset() override { return position_; }
+
+   private:
+    wasm::WasmInstructionIterator wasm_insn_iterator;
+    BreakLocatorType break_locator_type_;
+    Handle<wasm::WasmDebugInfo> wasm_debug_info;
+    int func_index;
+    DISALLOW_COPY_AND_ASSIGN(WasmBytecodeIterator);
+  };
+
   static Iterator* GetIterator(Handle<DebugInfo> debug_info,
                                BreakLocatorType type = ALL_BREAK_LOCATIONS);
 
  private:
   friend class Debug;
 
   static int BreakIndexFromCodeOffset(Handle<DebugInfo> debug_info, int offset);
 
   void SetDebugBreak();
   void ClearDebugBreak();
@@ skipping 212 matching lines @@
   void EnqueueCommandMessage(Vector<const uint16_t> command,
                              v8::Debug::ClientData* client_data = NULL);
   MUST_USE_RESULT MaybeHandle<Object> Call(Handle<Object> fun,
                                            Handle<Object> data);
   Handle<Context> GetDebugContext();
   void HandleDebugBreak();
   void ProcessDebugMessages(bool debug_command_only);
 
   // Internal logic
   bool Load();
-  void Break(JavaScriptFrame* frame);
-  void SetAfterBreakTarget(JavaScriptFrame* frame);
+  void Break(StandardFrame* frame);
+  void SetAfterBreakTarget(StandardFrame* frame);
 
   // Scripts handling.
   Handle<FixedArray> GetLoadedScripts();
 
   // Break point handling.
   bool SetBreakPoint(Handle<JSFunction> function,
                      Handle<Object> break_point_object,
                      int* source_position);
   bool SetBreakPointForScript(Handle<Script> script,
                               Handle<Object> break_point_object,
@@ skipping 362 matching lines @@
                                   Handle<Code> code);
   static bool DebugBreakSlotIsPatched(Address pc);
   static void ClearDebugBreakSlot(Isolate* isolate, Address pc);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_DEBUG_DEBUG_H_