6375 Add native name demangling support

*** 20,38 ****
   */
  
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <dlfcn.h>
  #include <stdarg.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <demangle.h>
  
  #include "dis_util.h"
  
  int g_error;    /* global process exit status, set when warn() is called */
  
--- 20,39 ----
   */
  
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  *
+  * Copyright 2017 Jason King.
   */
  
  #include <dlfcn.h>
  #include <stdarg.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <demangle.h>
+ #include <sysdemangle.h>
  
  #include "dis_util.h"
  
  int g_error;    /* global process exit status, set when warn() is called */
  
*** 90,147 ****
          return (ret);
  }
  
  
  /*
!  * Generic interface to demangle C++ names.  Calls cplus_demangle to do the
!  * necessary translation.  If the translation fails, the argument is returned
!  * unchanged.  The memory returned is only valid until the next call to
!  * demangle().
!  *
!  * We dlopen() libdemangle.so rather than linking directly against it in case it
!  * is not installed on the system.
   */
  const char *
  dis_demangle(const char *name)
  {
!         static char *demangled_name;
!         static int (*demangle_func)() = NULL;
!         static int size = BUFSIZE;
!         static int first_flag = 0;
!         int ret;
  
-         /*
-          * If this is the first call, allocate storage
-          * for the buffer.
-          */
-         if (first_flag == 0) {
-                 void *demangle_hand;
- 
-                 demangle_hand = dlopen("libdemangle.so.1", RTLD_LAZY);
-                 if (demangle_hand != NULL)
-                         demangle_func = (int (*)(int))dlsym(
-                                 demangle_hand, "cplus_demangle");
- 
-                 demangled_name = safe_malloc(size);
-                 first_flag = 1;
-         }
- 
-         /*
-          * If libdemangle is not present, pass through unchanged.
-          */
-         if (demangle_func == NULL)
-                 return (name);
- 
-         /*
-          * The function returns -1 when the buffer size is not sufficient.
-          */
-         while ((ret = (*demangle_func)(name, demangled_name, size)) == -1) {
                  free(demangled_name);
!                 size = size + BUFSIZE;
!                 demangled_name = safe_malloc(size);
!         }
! 
!         if (ret != 0)
!                 return (name);
! 
!         return (demangled_name);
  }
--- 91,107 ----
          return (ret);
  }
  
  
  /*
!  * Since -C flag explicitly says C++, for now at least, force language to
!  * C++
   */
  const char *
  dis_demangle(const char *name)
  {
!         static char *demangled_name = NULL;
  
          free(demangled_name);
!         demangled_name = sysdemangle(name, SYSDEM_LANG_CPP, NULL);
!         return ((demangled_name != NULL) ? demangled_name : name);
  }