Adding untrusted crash dump / stack trace tests.

src/trusted/service_runtime/sel_main.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.
  */
 
 /*
  * NaCl Simple/secure ELF loader (NaCl SEL).
  */
 #include "native_client/src/include/portability.h"
@@ skipping 201 matching lines @@
 #if NACL_OSX
   /* Mac dynamic libraries cannot access the environ variable directly. */
   envp = (const char **) *_NSGetEnviron();
 #else
   /* Overzealous code style check is overzealous. */
   /* @IGNORE_LINES_FOR_CODE_HYGIENE[1] */
   extern char **environ;
   envp = (const char **) environ;
 #endif
 
+#ifdef NACL_EXCEPTION_HANDLING_REQUESTED
+  exception_handling_requested = 1;
+#endif
+
 #if NACL_ARCH(NACL_BUILD_ARCH) == NACL_arm || NACL_SANDBOX_FIXED_AT_ZERO == 1
   /*
    * Set malloc not to use mmap even for large allocations.  This is currently
    * necessary when we must use a specific area of RAM for the sandbox.
    *
    * During startup, before the sandbox is set up, the sel_ldr allocates a chunk
    * of memory to store the untrusted code.  Normally such an allocation would
    * go into the sel_ldr's heap area, but the allocation is typically large --
    * at least hundreds of KiB.  The default malloc configuration on Linux (at
    * least) switches to mmap for such allocations, and mmap will select
@@ skipping 693 matching lines @@
   fflush(stdout);
 
   if (handle_signals) NaClSignalHandlerFini();
   NaClAllModulesFini();
 
   NaClExit(ret_code);
 
   /* Unreachable, but having the return prevents a compiler error. */
   return ret_code;
 }