[wasm] Support undefined indirect table entries, behind a flag.

test/mjsunit/wasm/default-func-call2.js

Index: test/mjsunit/wasm/default-func-call2.js
diff --git a/test/mjsunit/wasm/indirect-calls.js b/test/mjsunit/wasm/default-func-call2.js
similarity index 55%
copy from test/mjsunit/wasm/indirect-calls.js
copy to test/mjsunit/wasm/default-func-call2.js
index 80bee412e028541e3b54ba7a175a512cb8293e77..8863eac6a1ee902a0ce2719e03339ead03faed7e 100644
--- a/test/mjsunit/wasm/indirect-calls.js
+++ b/test/mjsunit/wasm/default-func-call2.js
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 // Flags: --expose-wasm
+// Flags: --wasm-jit-prototype
 
 load("test/mjsunit/wasm/wasm-constants.js");
 load("test/mjsunit/wasm/wasm-module-builder.js");
@@ -22,6 +23,17 @@ var module = (function () {
       kExprGetLocal, 1,             // --
       kExprI32Sub,                  // --
     ]);
+  builder.appendToFunctionTable([0, 1]);
+  var i;
+  for(i = 0; i < 2000; i++){
+    builder.addFunction("sub".concat(i.toString()), sig_index)
+      .addBody([
+        kExprGetLocal, 0,             // --
+        kExprGetLocal, 1,             // --
+        kExprI32Sub,                  // --
+      ]);
+    builder.appendToFunctionTable([i + 2]);
+  }
   builder.addFunction("main", kSig_i_iii)
     .addBody([
       kExprGetLocal, 0,
@@ -30,7 +42,8 @@ var module = (function () {
       kExprCallIndirect, kArity2, sig_index
     ])
     .exportFunc()
-  builder.appendToFunctionTable([0, 1, 2]);
+  builder.appendToFunctionTable([2002]);
+
 
   return builder.instantiate({add: function(a, b) { return a + b | 0; }});
 })();
@@ -42,8 +55,12 @@ assertFalse(module === 0);
 assertEquals("object", typeof module.exports);
 assertEquals("function", typeof module.exports.main);
 
-assertEquals(5, module.exports.main(1, 12, 7));
-assertEquals(19, module.exports.main(0, 12, 7));
-
-assertTraps(kTrapFuncSigMismatch, "module.exports.main(2, 12, 33)");
-assertTraps(kTrapFuncInvalid, "module.exports.main(3, 12, 33)");
+// Check that the appropriate trap is generated
+assertTraps(kTrapFuncInvalid, "module.exports.main(-1,15,16)");
+assertTraps(kTrapFuncInvalid, "module.exports.main(100000,15,16)");
+assertTraps(kTrapFuncInvalid, "module.exports.main(4006,15,16)");
+assertTraps(kTrapFuncInvalid, "module.exports.main(4007,15,16)");
+assertTraps(kTrapDefaultFuncCall, "module.exports.main(4005,15,16)");
+assertTraps(kTrapDefaultFuncCall, "module.exports.main(2003,15,16)");
+assertTraps(kTrapDefaultFuncCall, "module.exports.main(3000,15,16)");
+assertTraps(kTrapFuncSigMismatch, "module.exports.main(2002,15,16)");