.

2 files changed, 0 insertions, 454 deletions

diff --git a/lib/c-stack.c b/lib/c-stack.c
deleted file mode 100644
index b50271070..000000000
--- a/lib/c-stack.c
+++ /dev/null
@@ -1,435 +0,0 @@
-/* Stack overflow handling.
-
-   Copyright (C) 2002 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
-
-/* Written by Paul Eggert.  */
-
-/* NOTES:
-
-   A program that uses alloca, dynamic arrays, or large local
-   variables may extend the stack by more than a page at a time.  If
-   so, when the stack overflows the operating system may not detect
-   the overflow until the program uses the array, and this module may
-   incorrectly report a program error instead of a stack overflow.
-
-   To avoid this problem, allocate only small objects on the stack; a
-   program should be OK if it limits single allocations to a page or
-   less.  Allocate larger arrays in static storage, or on the heap
-   (e.g., with malloc).  Yes, this is a pain, but we don't know of any
-   better solution that is portable.
-
-   No attempt has been made to deal with multithreaded applications.
-
-   If ! HAVE_XSI_STACK_OVERFLOW_HEURISTIC, the current implementation
-   assumes that, if the RLIMIT_STACK limit changes during execution,
-   then c_stack_action is invoked immediately afterwards.  */
-
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#ifndef __attribute__
-# if __GNUC__ < 3 || __STRICT_ANSI__
-#  define __attribute__(x)
-# endif
-#endif
-
-#include "gettext.h"
-#define _(msgid) gettext (msgid)
-
-#include <errno.h>
-#ifndef ENOTSUP
-# define ENOTSUP EINVAL
-#endif
-#ifndef EOVERFLOW
-# define EOVERFLOW EINVAL
-#endif
-
-#include <signal.h>
-#if ! HAVE_STACK_T && ! defined stack_t
-typedef struct sigaltstack stack_t;
-#endif
-
-#include <stdlib.h>
-#include <string.h>
-
-#if HAVE_SYS_RESOURCE_H
-/* Include sys/time.h here, because...
-   SunOS-4.1.x <sys/resource.h> fails to include <sys/time.h>.
-   This gives "incomplete type" errors for ru_utime and tu_stime.  */
-# if HAVE_SYS_TIME_H
-#  include <sys/time.h>
-# endif
-# include <sys/resource.h>
-#endif
-
-#if HAVE_UCONTEXT_H
-# include <ucontext.h>
-#endif
-
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-#ifndef STDERR_FILENO
-# define STDERR_FILENO 2
-#endif
-
-#if DEBUG
-# include <stdio.h>
-#endif
-
-#include "c-stack.h"
-#include "exitfail.h"
-
-extern char *program_name;
-
-/* The user-specified action to take when a SEGV-related program error
-   or stack overflow occurs.  */
-static void (* volatile segv_action) (int);
-
-/* Translated messages for program errors and stack overflow.  Do not
-   translate them in the signal handler, since gettext is not
-   async-signal-safe.  */
-static char const * volatile program_error_message;
-static char const * volatile stack_overflow_message;
-
-/* Output an error message, then exit with status EXIT_FAILURE if it
-   appears to have been a stack overflow, or with a core dump
-   otherwise.  This function is async-signal-safe.  */
-
-static void die (int) __attribute__ ((noreturn));
-static void
-die (int signo)
-{
-  char const *message =
-    signo ? program_error_message : stack_overflow_message;
-  segv_action (signo);
-  write (STDERR_FILENO, program_name, strlen (program_name));
-  write (STDERR_FILENO, ": ", 2);
-  write (STDERR_FILENO, message, strlen (message));
-  write (STDERR_FILENO, "\n", 1);
-  if (! signo)
-    _exit (exit_failure);
-  kill (getpid (), signo);
-  abort ();
-}
-
-#if HAVE_SIGALTSTACK && HAVE_DECL_SIGALTSTACK
-
-/* Direction of the C runtime stack.  This function is
-   async-signal-safe.  */
-
-# if STACK_DIRECTION
-#  define find_stack_direction(ptr) STACK_DIRECTION
-# else
-static int
-find_stack_direction (char const *addr)
-{
-  char dummy;
-  return ! addr ? find_stack_direction (&dummy) : addr < &dummy ? 1 : -1;
-}
-# endif
-
-# if HAVE_XSI_STACK_OVERFLOW_HEURISTIC
-#  define get_stack_location(argv) 0
-# else
-
-#  if defined RLIMIT_STACK && defined _SC_PAGESIZE
-
-/* Return the minimum machine address deducible from ARGV.  This
-   includes the addresses of all the strings that ARGV points at, as
-   well as the address of ARGV itself.  */
-
-static char const *
-min_address_from_argv (char * const *argv)
-{
-  char const *min = (char const *) argv;
-  char const *p;
-  while ((p = *argv++))
-    if (p < min)
-      min = p;
-  return min;
-}
-
-/* Return the maximum machine address deducible from ARGV.  */
-
-static char const *
-max_address_from_argv (char * const *argv)
-{
-  char const *max = *argv;
-  char const *max1;
-  char const *p;
-  while ((p = *argv++))
-    if (max < p)
-      max = p;
-  max1 = (char const *) (argv + 1);
-  return max && max1 < max ? max + strlen (max) + 1 : max1;
-}
-#  endif
-
-/* The base and size of the stack, determined at startup.  */
-static char const * volatile stack_base;
-static size_t volatile stack_size;
-
-/* Store the base and size of the stack into the static variables
-   STACK_BASE and STACK_SIZE.  The base is the numerically lowest
-   address in the stack.  Return -1 (setting errno) if this cannot be
-   done.  */
-
-static int
-get_stack_location (char * const *argv)
-{
-#  if ! (defined RLIMIT_STACK && defined _SC_PAGESIZE)
-
-  errno = ENOTSUP;
-  return -1;
-
-#  else
-
-  struct rlimit rlimit;
-  int r = getrlimit (RLIMIT_STACK, &rlimit);
-  if (r == 0)
-    {
-      char const *base;
-      size_t size = rlimit.rlim_cur;
-      extern char **environ;
-      size_t page_size = sysconf (_SC_PAGESIZE);
-      int stack_direction = find_stack_direction (0);
-
-#   if HAVE_GETCONTEXT && HAVE_DECL_GETCONTEXT
-      ucontext_t context;
-      if (getcontext (&context) == 0)
-	{
-	  base = context.uc_stack.ss_sp;
-	  if (stack_direction < 0)
-	    base -= size - context.uc_stack.ss_size;
-	}
-      else
-#   endif
-	{
-	  if (stack_direction < 0)
-	    {
-	      char const *a = max_address_from_argv (argv);
-	      char const *b = max_address_from_argv (environ);
-	      base = (a < b ? b : a) - size;
-	      base += - (size_t) base % page_size;
-	    }
-	  else
-	    {
-	      char const *a = min_address_from_argv (argv);
-	      char const *b = min_address_from_argv (environ);
-	      base = a < b ? a : b;
-	      base -= (size_t) base % page_size;
-	    }
-	}
-
-      if (size != rlimit.rlim_cur
-	  || rlimit.rlim_cur < 0
-	  || base + size < base
-#   ifdef RLIM_SAVED_CUR
-	  || rlimit.rlim_cur == RLIM_SAVED_CUR
-#   endif
-#   ifdef RLIM_SAVED_MAX
-	  || rlimit.rlim_cur == RLIM_SAVED_MAX
-#   endif
-#   ifdef RLIM_INFINITY
-	  || rlimit.rlim_cur == RLIM_INFINITY
-#   endif
-	  )
-	{
-	  errno = EOVERFLOW;
-	  return -1;
-	}
-
-      stack_base = base;
-      stack_size = size;
-
-#   if DEBUG
-      fprintf (stderr, "get_stack_location base=%p size=%lx\n",
-	       base, (unsigned long) size);
-#   endif
-    }
-
-  return r;
-
-#  endif
-}
-# endif
-
-/* Storage for the alternate signal stack.  */
-static union
-{
-  char buffer[SIGSTKSZ];
-
-  /* These other members are for proper alignment.  There's no
-     standard way to guarantee stack alignment, but this seems enough
-     in practice.  */
-  long double ld;
-  long l;
-  void *p;
-} alternate_signal_stack;
-
-# if defined SA_ONSTACK && defined SA_SIGINFO && defined _SC_PAGESIZE
-
-/* Handle a segmentation violation and exit.  This function is
-   async-signal-safe.  */
-
-static void segv_handler (int, siginfo_t *, void *) __attribute__((noreturn));
-static void
-segv_handler (int signo, siginfo_t *info,
-	      void *context __attribute__ ((unused)))
-{
-  /* Clear SIGNO if it seems to have been a stack overflow.  */
-  if (0 < info->si_code)
-    {
-      /* If the faulting address is within the stack, or within one
-	 page of the stack end, assume that it is a stack
-	 overflow.  */
-#  if HAVE_XSI_STACK_OVERFLOW_HEURISTIC
-      ucontext_t const *user_context = context;
-      char const *stack_base = user_context->uc_stack.ss_sp;
-      size_t stack_size = user_context->uc_stack.ss_size;
-#  endif
-      char const *faulting_address = info->si_addr;
-      size_t s = faulting_address - stack_base;
-      size_t page_size = sysconf (_SC_PAGESIZE);
-      if (find_stack_direction (0) < 0)
-	s += page_size;
-      if (s < stack_size + page_size)
-	signo = 0;
-
-#  if DEBUG
-      {
-	char buf[1024];
-	sprintf (buf,
-		 "segv_handler fault=%p base=%p size=%lx page=%lx signo=%d\n",
-		 faulting_address, stack_base, (unsigned long) stack_size,
-		 (unsigned long) page_size, signo);
-	write (STDERR_FILENO, buf, strlen (buf));
-      }
-#  endif
-    }
-
-  die (signo);
-}
-# endif
-
-static void
-null_action (int signo __attribute__ ((unused)))
-{
-}
-
-/* Assuming ARGV is the argument vector of `main', set up ACTION so
-   that it is invoked on C stack overflow.  Return -1 (setting errno)
-   if this cannot be done.
-
-   When ACTION is called, it is passed an argument equal to SIGSEGV
-   for a segmentation violation that does not appear related to stack
-   overflow, and is passed zero otherwise.
-
-   A null ACTION acts like an action that does nothing.
-
-   ACTION must be async-signal-safe.  ACTION together with its callees
-   must not require more than SIGSTKSZ bytes of stack space.  */
-
-int
-c_stack_action (char * const *argv __attribute__ ((unused)),
-		void (*action) (int))
-{
-  int r = get_stack_location (argv);
-  if (r != 0)
-    return r;
-
-  {
-    stack_t st;
-    st.ss_flags = 0;
-    st.ss_sp = alternate_signal_stack.buffer;
-    st.ss_size = sizeof alternate_signal_stack.buffer;
-    r = sigaltstack (&st, 0);
-    if (r != 0)
-      return r;
-  }
-
-  segv_action = action ? action : null_action;
-  program_error_message = _("program error");
-  stack_overflow_message = _("stack overflow");
-
-  {
-# if ! (defined SA_ONSTACK && defined SA_SIGINFO && defined _SC_PAGESIZE)
-    return signal (SIGSEGV, die) == SIG_ERR ? -1 : 0;
-# else
-    struct sigaction act;
-    sigemptyset (&act.sa_mask);
-
-    /* POSIX 1003.1-2001 says SA_RESETHAND implies SA_NODEFER, but
-       this is not true on Solaris 8 at least.  It doesn't hurt to use
-       SA_NODEFER here, so leave it in.  */
-    act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND | SA_SIGINFO;
-
-    act.sa_sigaction = segv_handler;
-
-    return sigaction (SIGSEGV, &act, 0);
-# endif
-  }
-}
-
-#else /* ! (HAVE_SIGALTSTACK && HAVE_DECL_SIGALTSTACK) */
-
-int
-c_stack_action (char * const *argv __attribute__ ((unused)),
-		void (*action) (int)  __attribute__ ((unused)))
-{
-  errno = ENOTSUP;
-  return -1;
-}
-
-#endif
-
-
-
-#if DEBUG
-
-int volatile exit_failure;
-
-static long
-recurse (char *p)
-{
-  char array[500];
-  array[0] = 1;
-  return *p + recurse (array);
-}
-
-char *program_name;
-
-int
-main (int argc __attribute__ ((unused)), char **argv)
-{
-  program_name = argv[0];
-  fprintf (stderr, "The last line of output should be \"stack overflow\".\n");
-  if (c_stack_action (argv, 0) == 0)
-    return recurse ("\1");
-  perror ("c_stack_action");
-  return 1;
-}
-
-#endif /* DEBUG */
-
-/*
-Local Variables:
-compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W c-stack.c"
-End:
-*/
diff --git a/lib/c-stack.h b/lib/c-stack.h
deleted file mode 100644
index 8ef4ca22c..000000000
--- a/lib/c-stack.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/* Stack overflow handling.
-
-   Copyright (C) 2002 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
-
-int c_stack_action (char * const *, void (*) (int));