[wasm] prototype for breakpoint support.

src/objects.h

 // Copyright 2015 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/assert-scope.h"
@@ skipping 4856 matching lines @@
 #define NON_IC_KIND_LIST(V) \
   V(FUNCTION)               \
   V(OPTIMIZED_FUNCTION)     \
   V(BYTECODE_HANDLER)       \
   V(STUB)                   \
   V(HANDLER)                \
   V(BUILTIN)                \
   V(REGEXP)                 \
   V(WASM_FUNCTION)          \
   V(WASM_TO_JS_FUNCTION)    \
-  V(JS_TO_WASM_FUNCTION)
+  V(JS_TO_WASM_FUNCTION)    \
+  V(WASM_TO_INTERPRETER)
 
 #define IC_KIND_LIST(V) \
   V(LOAD_IC)            \
   V(LOAD_GLOBAL_IC)     \
   V(KEYED_LOAD_IC)      \
   V(CALL_IC)            \
   V(STORE_IC)           \
   V(KEYED_STORE_IC)     \
   V(BINARY_OP_IC)       \
   V(COMPARE_IC)         \
@@ skipping 5722 matching lines @@
       kConstructorOffset + kPointerSize;
   static const int kSize = kInternalFieldCountOffset + kPointerSize;
 };
 
 
 // The DebugInfo class holds additional information for a function being
 // debugged.
 class DebugInfo: public Struct {
  public:
   // The shared function info for the source being debugged.
+  // Some debug info does not have an shared function info, e.g. for wasm, so
+  // check has_shared() before calling shared().
   DECL_ACCESSORS(shared, SharedFunctionInfo)
   // Code object for the patched code. This code object is the code object
   // currently active for the function.
   DECL_ACCESSORS(abstract_code, AbstractCode)
   // Fixed array holding status information for each active break point.
   DECL_ACCESSORS(break_points, FixedArray)
 
+  // Check whether a shared function info is available for this debug info.
+  inline bool has_shared() const;
   // Check if there is a break point at a code offset.
   bool HasBreakPoint(int code_offset);
   // Get the break point info object for a code offset.
   Object* GetBreakPointInfo(int code_offset);
   // Clear a break point.
   static void ClearBreakPoint(Handle<DebugInfo> debug_info, int code_offset,
                               Handle<Object> break_point_object);
   // Set a break point.
   static void SetBreakPoint(Handle<DebugInfo> debug_info, int code_offset,
                             int source_position, int statement_position,
@@ skipping 197 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_