[wasm] Adding feature to JIT a wasm function at runtime and hook up the compiled code into the indi…

src/messages.h

 // Copyright 2006-2008 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.
 
 // The infrastructure used for (localized) message reporting in V8.
 //
 // Note: there's a big unresolved issue about ownership of the data
 // structures used by this framework.
 
 #ifndef V8_MESSAGES_H_
@@ skipping 474 matching lines @@
   T(URIMalformed, "URI malformed")                                             \
   /* Wasm errors (currently Error) */                                          \
   T(WasmTrapUnreachable, "unreachable")                                        \
   T(WasmTrapMemOutOfBounds, "memory access out of bounds")                     \
   T(WasmTrapDivByZero, "divide by zero")                                       \
   T(WasmTrapDivUnrepresentable, "divide result unrepresentable")               \
   T(WasmTrapRemByZero, "remainder by zero")                                    \
   T(WasmTrapFloatUnrepresentable, "integer result unrepresentable")            \
   T(WasmTrapFuncInvalid, "invalid function")                                   \
   T(WasmTrapFuncSigMismatch, "function signature mismatch")                    \
-  T(WasmTrapMemAllocationFail, "failed to allocate memory")
+  T(WasmTrapMemAllocationFail, "failed to allocate memory")                    \
+  T(WasmTrapInvalidIndex, "invalid index into function table")

[titzer, 2016/07/14 08:59:43]

This is the same condition as TrapFuncInvalid.

[ritesht, 2016/07/14 18:10:00]

The point of this is to draw the distinction between calling a function that is
already hooked to the table and a slot in the table where a potential compiled
code would be hooked to. I thought this would be more appropriate as the
function doesn't exist yet at that particular index.

 
 class MessageTemplate {
  public:
   enum Template {
 #define TEMPLATE(NAME, STRING) k##NAME,
     MESSAGE_TEMPLATES(TEMPLATE)
 #undef TEMPLATE
         kLastMessage
   };
 
@@ skipping 28 matching lines @@
   static Handle<String> GetMessage(Isolate* isolate, Handle<Object> data);
   static base::SmartArrayPointer<char> GetLocalizedMessage(Isolate* isolate,
                                                            Handle<Object> data);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MESSAGES_H_