Add validation caching interface.

src/trusted/validator/x86/ncval_seg_sfi/ncvalidate.c

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*
  * ncvalidate.c
  * Validate x86 instructions for Native Client
  *
@@ skipping 60 matching lines @@
 static int kMaxDiagnostics = 0;
 
 int NCValidatorGetMaxDiagnostics() {
   return kMaxDiagnostics;
 }
 
 void NCValidatorSetMaxDiagnostics(int new_value) {
   kMaxDiagnostics = new_value;
 }
 
+int NCValidatorDidStubOut(struct NCValidatorState *vstate) {
+  return vstate->stats.didstubout;
+}
+
 /* This function is intended to only be called by ValidatePrintInstructionError
  * and ValidatePrintOffsetError.
  */
 static void ValidatePrintError(const NaClPcAddress addr,
                                const char *msg,
                                struct NCValidatorState *vstate) {
   if (vstate->num_diagnostics != 0) {
     NaClErrorReporter* reporter = vstate->dstate.error_reporter;
     (*reporter->printf)(
         reporter,
@@ skipping 961 matching lines @@
   }
 
   /* check basic block boundaries */
   for (offset = 0; offset < vstate->codesize; offset += vstate->alignment) {
     if (!NCGetAdrTable(offset, vstate->vttable)) {
       ValidatePrintOffsetError(offset, "Bad basic block alignment", vstate);
       NCStatsBadAlignment(vstate);
     }
   }
 }