diff mbox series

[1/2] debug: Refactor and expand _FORTIFY_SOURCE tests

Message ID 20220105013946.2646963-2-siddhesh@sourceware.org
State Not Applicable
Headers show
Series _FORTIFY_SOURCE fixes | expand

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Commit Message

Siddhesh Poyarekar Jan. 5, 2022, 1:39 a.m. UTC
Rename all debug/tst-chk* tests to reflect the fortification level
they're testing and any additional macros so that rules for them can be
autogenerated.  tst-chk0* are without fortification, tst-chk1 for
_FORTIFY_SOURCE=1 and so on.  This allows easier replication of the
tests to check additional macros.

The change also expands the -lfs tests to include _FORTIFY_SOURCE=3.

Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
---
 debug/Makefile                              |   75 +-
 debug/tst-chk0-lfs.c                        |    2 +
 debug/tst-chk0.c                            | 1726 ++++++++++++++++++
 debug/tst-chk0cc-lfs.cc                     |    2 +
 debug/tst-chk0cc.cc                         |    1 +
 debug/{tst-lfschk1.c => tst-chk1-lfs.c}     |    0
 debug/tst-chk1.c                            | 1728 +------------------
 debug/{tst-lfschk4.cc => tst-chk1cc-lfs.cc} |    0
 debug/{tst-chk5.cc => tst-chk1cc.cc}        |    2 +-
 debug/{tst-lfschk2.c => tst-chk2-lfs.c}     |    0
 debug/tst-chk2.c                            |    4 +-
 debug/{tst-lfschk5.cc => tst-chk2cc-lfs.cc} |    0
 debug/{tst-chk6.cc => tst-chk2cc.cc}        |    2 +-
 debug/{tst-lfschk3.c => tst-chk3-lfs.c}     |    0
 debug/tst-chk3.c                            |    4 +-
 debug/{tst-lfschk6.cc => tst-chk3cc-lfs.cc} |    0
 debug/{tst-chk8.cc => tst-chk3cc.cc}        |    2 +-
 debug/tst-chk4.cc                           |    1 -
 debug/tst-chk7.c                            |    2 -
 19 files changed, 1773 insertions(+), 1778 deletions(-)
 create mode 100644 debug/tst-chk0-lfs.c
 create mode 100644 debug/tst-chk0.c
 create mode 100644 debug/tst-chk0cc-lfs.cc
 create mode 100644 debug/tst-chk0cc.cc
 rename debug/{tst-lfschk1.c => tst-chk1-lfs.c} (100%)
 rename debug/{tst-lfschk4.cc => tst-chk1cc-lfs.cc} (100%)
 rename debug/{tst-chk5.cc => tst-chk1cc.cc} (54%)
 rename debug/{tst-lfschk2.c => tst-chk2-lfs.c} (100%)
 rename debug/{tst-lfschk5.cc => tst-chk2cc-lfs.cc} (100%)
 rename debug/{tst-chk6.cc => tst-chk2cc.cc} (54%)
 rename debug/{tst-lfschk3.c => tst-chk3-lfs.c} (100%)
 rename debug/{tst-lfschk6.cc => tst-chk3cc-lfs.cc} (100%)
 rename debug/{tst-chk8.cc => tst-chk3cc.cc} (54%)
 delete mode 100644 debug/tst-chk4.cc
 delete mode 100644 debug/tst-chk7.c
diff mbox series

Patch

diff --git a/debug/Makefile b/debug/Makefile
index bc37e466ee..fe94cd3072 100644
--- a/debug/Makefile
+++ b/debug/Makefile
@@ -1,4 +1,5 @@ 
 # Copyright (C) 1998-2021 Free Software Foundation, Inc.
+# Copyright The GNU Toolchain Authors.
 # This file is part of the GNU C Library.
 
 # The GNU C Library is free software; you can redistribute it and/or
@@ -110,32 +111,31 @@  CFLAGS-tst-longjmp_chk3.c += -fexceptions -fasynchronous-unwind-tables
 CPPFLAGS-tst-longjmp_chk3.c += -D_FORTIFY_SOURCE=1
 CPPFLAGS-tst-realpath-chk.c += -D_FORTIFY_SOURCE=2
 
+# _FORTIFY_SOURCE tests.
+tests-chk = $(addprefix tst-chk, 0 1 2 3)
+tests-chk-cc = $(addsuffix cc, $(tests-chk))
+tests-chk-lfs = $(addsuffix -lfs, $(tests-chk))
+tests-chk-cc-lfs = $(addsuffix -lfs, $(tests-chk-cc))
+
 # We know these tests have problems with format strings, this is what
 # we are testing.  Disable that warning.  They are also testing
 # deprecated functions (notably gets) so disable that warning as well.
 # And they also generate warnings from warning attributes, which
 # cannot be disabled via pragmas, so require -Wno-error to be used.
-CFLAGS-tst-chk1.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk2.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk3.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk4.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk5.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk6.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk7.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk8.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk1.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk2.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk3.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk4.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk5.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk6.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-LDLIBS-tst-chk4 = -lstdc++
-LDLIBS-tst-chk5 = -lstdc++
-LDLIBS-tst-chk6 = -lstdc++
-LDLIBS-tst-chk8 = -lstdc++
-LDLIBS-tst-lfschk4 = -lstdc++
-LDLIBS-tst-lfschk5 = -lstdc++
-LDLIBS-tst-lfschk6 = -lstdc++
+define disable-warnings
+CFLAGS-$(1).$(2) += -Wno-format -Wno-deprecated-declarations -Wno-error
+endef
+
+$(foreach t,$(tests-chk) $(tests-chk-lfs), \
+	  $(eval $(call disable-warnings,$(t),c)))
+
+$(foreach t,$(tests-chk-cc) $(tests-chk-cc-lfs), \
+	  $(eval $(call disable-warnings,$(t),cc)))
+
+define link-cc
+LDLIBS-$(1) = -lstdc++
+endef
+$(foreach t,$(tests-chk-cc) $(tests-chk-cc-lfs), $(eval $(call link-cc,$(t))))
 
 # backtrace_symbols only works if we link with -rdynamic.  backtrace
 # requires unwind tables on most architectures.
@@ -152,19 +152,18 @@  LDFLAGS-tst-backtrace6 = -rdynamic
 
 CFLAGS-tst-ssp-1.c += -fstack-protector-all
 
-tests = backtrace-tst tst-longjmp_chk tst-chk1 tst-chk2 tst-chk3 \
-	tst-lfschk1 tst-lfschk2 tst-lfschk3 test-strcpy_chk test-stpcpy_chk \
-	tst-chk4 tst-chk5 tst-chk6 tst-chk7 tst-chk8 tst-lfschk4 tst-lfschk5 \
-	tst-lfschk6 tst-longjmp_chk2 tst-backtrace2 tst-backtrace3 \
-	tst-backtrace4 tst-backtrace5 tst-backtrace6 tst-realpath-chk
+tests = backtrace-tst tst-longjmp_chk \
+	test-strcpy_chk test-stpcpy_chk \
+	tst-longjmp_chk2 tst-backtrace2 tst-backtrace3 \
+	tst-backtrace4 tst-backtrace5 tst-backtrace6 tst-realpath-chk \
+	$(tests-chk) $(tests-chk-cc) $(tests-chk-lfs) $(tests-chk-cc-lfs)
 
 ifeq ($(have-ssp),yes)
 tests += tst-ssp-1
 endif
 
 ifeq (,$(CXX))
-tests-unsupported = tst-chk4 tst-chk5 tst-chk6 tst-chk8 \
-		    tst-lfschk4 tst-lfschk5 tst-lfschk6
+tests-unsupported = $(tests-chk-cc) $(tests-chk-cc-lfs)
 endif
 
 extra-libs = libSegFault libpcprofile
@@ -191,20 +190,12 @@  ifeq ($(run-built-tests),yes)
 LOCALES := de_DE.UTF-8
 include ../gen-locales.mk
 
-$(objpfx)tst-chk1.out: $(gen-locales)
-$(objpfx)tst-chk2.out: $(gen-locales)
-$(objpfx)tst-chk3.out: $(gen-locales)
-$(objpfx)tst-chk4.out: $(gen-locales)
-$(objpfx)tst-chk5.out: $(gen-locales)
-$(objpfx)tst-chk6.out: $(gen-locales)
-$(objpfx)tst-chk7.out: $(gen-locales)
-$(objpfx)tst-chk8.out: $(gen-locales)
-$(objpfx)tst-lfschk1.out: $(gen-locales)
-$(objpfx)tst-lfschk2.out: $(gen-locales)
-$(objpfx)tst-lfschk3.out: $(gen-locales)
-$(objpfx)tst-lfschk4.out: $(gen-locales)
-$(objpfx)tst-lfschk5.out: $(gen-locales)
-$(objpfx)tst-lfschk6.out: $(gen-locales)
+define chk-gen-locales
+$(objpfx)$(1).out: $(gen-locales)
+endef
+$(foreach t, \
+	  $(tests-chk) $(tests-chk-cc) $(tests-chk-lfs) $(tests-chk-cc-lfs), \
+	  $(eval $(call link-cc,$(t))))
 endif
 
 sLIBdir := $(shell echo $(slibdir) | sed 's,lib\(\|64\)$$,\\\\$$LIB,')
diff --git a/debug/tst-chk0-lfs.c b/debug/tst-chk0-lfs.c
new file mode 100644
index 0000000000..2460b6baad
--- /dev/null
+++ b/debug/tst-chk0-lfs.c
@@ -0,0 +1,2 @@ 
+#define _FILE_OFFSET_BITS 64
+#include "tst-chk0.c"
diff --git a/debug/tst-chk0.c b/debug/tst-chk0.c
new file mode 100644
index 0000000000..d11e536f87
--- /dev/null
+++ b/debug/tst-chk0.c
@@ -0,0 +1,1726 @@ 
+/* Copyright (C) 2004-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+/* This file tests gets.  Force it to be declared.  */
+#include <features.h>
+#undef __GLIBC_USE_DEPRECATED_GETS
+#define __GLIBC_USE_DEPRECATED_GETS 1
+
+#include <assert.h>
+#include <fcntl.h>
+#include <locale.h>
+#include <obstack.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <wchar.h>
+#include <sys/poll.h>
+#include <sys/select.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+
+#define obstack_chunk_alloc malloc
+#define obstack_chunk_free free
+
+char *temp_filename;
+static void do_prepare (void);
+static int do_test (void);
+#define PREPARE(argc, argv) do_prepare ()
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
+
+static void
+do_prepare (void)
+{
+  int temp_fd = create_temp_file ("tst-chk1.", &temp_filename);
+  if (temp_fd == -1)
+    {
+      printf ("cannot create temporary file: %m\n");
+      exit (1);
+    }
+
+  const char *strs = "abcdefgh\nABCDEFGHI\nabcdefghij\nABCDEFGHIJ";
+  if ((size_t) write (temp_fd, strs, strlen (strs)) != strlen (strs))
+    {
+      puts ("could not write test strings into file");
+      unlink (temp_filename);
+      exit (1);
+    }
+}
+
+volatile int chk_fail_ok;
+volatile int ret;
+jmp_buf chk_fail_buf;
+
+static void
+handler (int sig)
+{
+  if (chk_fail_ok)
+    {
+      chk_fail_ok = 0;
+      longjmp (chk_fail_buf, 1);
+    }
+  else
+    _exit (127);
+}
+
+#if __USE_FORTIFY_LEVEL == 3
+volatile size_t buf_size = 10;
+#else
+char buf[10];
+wchar_t wbuf[10];
+#define buf_size sizeof (buf)
+#endif
+
+volatile size_t l0;
+volatile char *p;
+volatile wchar_t *wp;
+const char *str1 = "JIHGFEDCBA";
+const char *str2 = "F";
+const char *str3 = "%s%n%s%n";
+const char *str4 = "Hello, ";
+const char *str5 = "World!\n";
+const wchar_t *wstr1 = L"JIHGFEDCBA";
+const wchar_t *wstr2 = L"F";
+const wchar_t *wstr3 = L"%s%n%s%n";
+const wchar_t *wstr4 = L"Hello, ";
+const wchar_t *wstr5 = L"World!\n";
+char buf2[10] = "%s";
+int num1 = 67;
+int num2 = 987654;
+
+#define FAIL() \
+  do { printf ("Failure on line %d\n", __LINE__); ret = 1; } while (0)
+#define CHK_FAIL_START \
+  chk_fail_ok = 1;				\
+  if (! setjmp (chk_fail_buf))			\
+    {
+#define CHK_FAIL_END \
+      chk_fail_ok = 0;				\
+      FAIL ();					\
+    }
+#if __USE_FORTIFY_LEVEL >= 2 && (!defined __cplusplus || defined __va_arg_pack)
+# define CHK_FAIL2_START CHK_FAIL_START
+# define CHK_FAIL2_END CHK_FAIL_END
+#else
+# define CHK_FAIL2_START
+# define CHK_FAIL2_END
+#endif
+
+static int
+do_test (void)
+{
+#if __USE_FORTIFY_LEVEL == 3
+  char *buf = (char *) malloc (buf_size);
+  wchar_t *wbuf = (wchar_t *) malloc (buf_size * sizeof (wchar_t));
+#endif
+  set_fortify_handler (handler);
+
+  struct A { char buf1[9]; char buf2[1]; } a;
+  struct wA { wchar_t buf1[9]; wchar_t buf2[1]; } wa;
+
+  printf ("Test checking routines at fortify level %d\n",
+#ifdef __USE_FORTIFY_LEVEL
+	  (int) __USE_FORTIFY_LEVEL
+#else
+	  0
+#endif
+	  );
+
+#if defined __USE_FORTIFY_LEVEL && !defined __fortify_function
+  printf ("Test skipped");
+  if (l0 == 0)
+    return 0;
+#endif
+
+  /* These ops can be done without runtime checking of object size.  */
+  memcpy (buf, "abcdefghij", 10);
+  memmove (buf + 1, buf, 9);
+  if (memcmp (buf, "aabcdefghi", 10))
+    FAIL ();
+
+  memcpy (buf, "abcdefghij", 10);
+  bcopy (buf, buf + 1, 9);
+  if (memcmp (buf, "aabcdefghi", 10))
+    FAIL ();
+
+  if (mempcpy (buf + 5, "abcde", 5) != buf + 10
+      || memcmp (buf, "aabcdabcde", 10))
+    FAIL ();
+
+  memset (buf + 8, 'j', 2);
+  if (memcmp (buf, "aabcdabcjj", 10))
+    FAIL ();
+
+  bzero (buf + 8, 2);
+  if (memcmp (buf, "aabcdabc\0\0", 10))
+    FAIL ();
+
+  explicit_bzero (buf + 6, 4);
+  if (memcmp (buf, "aabcda\0\0\0\0", 10))
+    FAIL ();
+
+  strcpy (buf + 4, "EDCBA");
+  if (memcmp (buf, "aabcEDCBA", 10))
+    FAIL ();
+
+  if (stpcpy (buf + 8, "F") != buf + 9 || memcmp (buf, "aabcEDCBF", 10))
+    FAIL ();
+
+  strncpy (buf + 6, "X", 4);
+  if (memcmp (buf, "aabcEDX\0\0", 10))
+    FAIL ();
+
+  if (sprintf (buf + 7, "%s", "67") != 2 || memcmp (buf, "aabcEDX67", 10))
+    FAIL ();
+
+  if (snprintf (buf + 7, 3, "%s", "987654") != 6
+      || memcmp (buf, "aabcEDX98", 10))
+    FAIL ();
+
+  /* These ops need runtime checking, but shouldn't __chk_fail.  */
+  memcpy (buf, "abcdefghij", l0 + 10);
+  memmove (buf + 1, buf, l0 + 9);
+  if (memcmp (buf, "aabcdefghi", 10))
+    FAIL ();
+
+  memcpy (buf, "abcdefghij", l0 + 10);
+  bcopy (buf, buf + 1, l0 + 9);
+  if (memcmp (buf, "aabcdefghi", 10))
+    FAIL ();
+
+  if (mempcpy (buf + 5, "abcde", l0 + 5) != buf + 10
+      || memcmp (buf, "aabcdabcde", 10))
+    FAIL ();
+
+  memset (buf + 8, 'j', l0 + 2);
+  if (memcmp (buf, "aabcdabcjj", 10))
+    FAIL ();
+
+  bzero (buf + 8, l0 + 2);
+  if (memcmp (buf, "aabcdabc\0\0", 10))
+    FAIL ();
+
+  explicit_bzero (buf + 6, l0 + 4);
+  if (memcmp (buf, "aabcda\0\0\0\0", 10))
+    FAIL ();
+
+  strcpy (buf + 4, str1 + 5);
+  if (memcmp (buf, "aabcEDCBA", 10))
+    FAIL ();
+
+  if (stpcpy (buf + 8, str2) != buf + 9 || memcmp (buf, "aabcEDCBF", 10))
+    FAIL ();
+
+  strncpy (buf + 6, "X", l0 + 4);
+  if (memcmp (buf, "aabcEDX\0\0", 10))
+    FAIL ();
+
+  if (stpncpy (buf + 5, "cd", l0 + 5) != buf + 7
+      || memcmp (buf, "aabcEcd\0\0", 10))
+    FAIL ();
+
+  if (sprintf (buf + 7, "%d", num1) != 2 || memcmp (buf, "aabcEcd67", 10))
+    FAIL ();
+
+  if (snprintf (buf + 7, 3, "%d", num2) != 6 || memcmp (buf, "aabcEcd98", 10))
+    FAIL ();
+
+  buf[l0 + 8] = '\0';
+  strcat (buf, "A");
+  if (memcmp (buf, "aabcEcd9A", 10))
+    FAIL ();
+
+  buf[l0 + 7] = '\0';
+  strncat (buf, "ZYXWV", l0 + 2);
+  if (memcmp (buf, "aabcEcdZY", 10))
+    FAIL ();
+
+  /* The following tests are supposed to succeed at all fortify
+     levels, even though they overflow a.buf1 into a.buf2.  */
+  memcpy (a.buf1, "abcdefghij", l0 + 10);
+  memmove (a.buf1 + 1, a.buf1, l0 + 9);
+  if (memcmp (a.buf1, "aabcdefghi", 10))
+    FAIL ();
+
+  memcpy (a.buf1, "abcdefghij", l0 + 10);
+  bcopy (a.buf1, a.buf1 + 1, l0 + 9);
+  if (memcmp (a.buf1, "aabcdefghi", 10))
+    FAIL ();
+
+  if (mempcpy (a.buf1 + 5, "abcde", l0 + 5) != a.buf1 + 10
+      || memcmp (a.buf1, "aabcdabcde", 10))
+    FAIL ();
+
+  memset (a.buf1 + 8, 'j', l0 + 2);
+  if (memcmp (a.buf1, "aabcdabcjj", 10))
+    FAIL ();
+
+  bzero (a.buf1 + 8, l0 + 2);
+  if (memcmp (a.buf1, "aabcdabc\0\0", 10))
+    FAIL ();
+
+  explicit_bzero (a.buf1 + 6, l0 + 4);
+  if (memcmp (a.buf1, "aabcda\0\0\0\0", 10))
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL < 2
+  /* The following tests are supposed to crash with -D_FORTIFY_SOURCE=2
+     and sufficient GCC support, as the string operations overflow
+     from a.buf1 into a.buf2.  */
+  strcpy (a.buf1 + 4, str1 + 5);
+  if (memcmp (a.buf1, "aabcEDCBA", 10))
+    FAIL ();
+
+  if (stpcpy (a.buf1 + 8, str2) != a.buf1 + 9
+      || memcmp (a.buf1, "aabcEDCBF", 10))
+    FAIL ();
+
+  strncpy (a.buf1 + 6, "X", l0 + 4);
+  if (memcmp (a.buf1, "aabcEDX\0\0", 10))
+    FAIL ();
+
+  if (sprintf (a.buf1 + 7, "%d", num1) != 2
+      || memcmp (a.buf1, "aabcEDX67", 10))
+    FAIL ();
+
+  if (snprintf (a.buf1 + 7, 3, "%d", num2) != 6
+      || memcmp (a.buf1, "aabcEDX98", 10))
+    FAIL ();
+
+  a.buf1[l0 + 8] = '\0';
+  strcat (a.buf1, "A");
+  if (memcmp (a.buf1, "aabcEDX9A", 10))
+    FAIL ();
+
+  a.buf1[l0 + 7] = '\0';
+  strncat (a.buf1, "ZYXWV", l0 + 2);
+  if (memcmp (a.buf1, "aabcEDXZY", 10))
+    FAIL ();
+
+#endif
+
+#if __USE_FORTIFY_LEVEL >= 1
+  /* Now check if all buffer overflows are caught at runtime.
+     N.B. All tests involving a length parameter need to be done
+     twice: once with the length a compile-time constant, once without.  */
+
+  CHK_FAIL_START
+  memcpy (buf + 1, "abcdefghij", 10);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  memcpy (buf + 1, "abcdefghij", l0 + 10);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  memmove (buf + 2, buf + 1, 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  memmove (buf + 2, buf + 1, l0 + 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bcopy (buf + 1, buf + 2, 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bcopy (buf + 1, buf + 2, l0 + 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  p = (char *) mempcpy (buf + 6, "abcde", 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  p = (char *) mempcpy (buf + 6, "abcde", l0 + 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  memset (buf + 9, 'j', 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  memset (buf + 9, 'j', l0 + 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bzero (buf + 9, 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bzero (buf + 9, l0 + 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  explicit_bzero (buf + 9, 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  explicit_bzero (buf + 9, l0 + 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  strcpy (buf + 5, str1 + 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  p = stpcpy (buf + 9, str2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  strncpy (buf + 7, "X", 4);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  strncpy (buf + 7, "X", l0 + 4);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  stpncpy (buf + 6, "cd", 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  stpncpy (buf + 6, "cd", l0 + 5);
+  CHK_FAIL_END
+
+# if !defined __cplusplus || defined __va_arg_pack
+  CHK_FAIL_START
+  sprintf (buf + 8, "%d", num1);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  snprintf (buf + 8, 3, "%d", num2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  snprintf (buf + 8, l0 + 3, "%d", num2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  swprintf (wbuf + 8, 3, L"%d", num1);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  swprintf (wbuf + 8, l0 + 3, L"%d", num1);
+  CHK_FAIL_END
+# endif
+
+  memcpy (buf, str1 + 2, 9);
+  CHK_FAIL_START
+  strcat (buf, "AB");
+  CHK_FAIL_END
+
+  memcpy (buf, str1 + 3, 8);
+  CHK_FAIL_START
+  strncat (buf, "ZYXWV", 3);
+  CHK_FAIL_END
+
+  memcpy (buf, str1 + 3, 8);
+  CHK_FAIL_START
+  strncat (buf, "ZYXWV", l0 + 3);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  memcpy (a.buf1 + 1, "abcdefghij", 10);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  memcpy (a.buf1 + 1, "abcdefghij", l0 + 10);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  memmove (a.buf1 + 2, a.buf1 + 1, 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  memmove (a.buf1 + 2, a.buf1 + 1, l0 + 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bcopy (a.buf1 + 1, a.buf1 + 2, 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bcopy (a.buf1 + 1, a.buf1 + 2, l0 + 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  p = (char *) mempcpy (a.buf1 + 6, "abcde", 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  p = (char *) mempcpy (a.buf1 + 6, "abcde", l0 + 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  memset (a.buf1 + 9, 'j', 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  memset (a.buf1 + 9, 'j', l0 + 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bzero (a.buf1 + 9, 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bzero (a.buf1 + 9, l0 + 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  explicit_bzero (a.buf1 + 9, 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  explicit_bzero (a.buf1 + 9, l0 + 2);
+  CHK_FAIL_END
+
+# if __USE_FORTIFY_LEVEL >= 2
+#  define O 0
+# else
+#  define O 1
+# endif
+
+  CHK_FAIL_START
+  strcpy (a.buf1 + (O + 4), str1 + 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  p = stpcpy (a.buf1 + (O + 8), str2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  strncpy (a.buf1 + (O + 6), "X", 4);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  strncpy (a.buf1 + (O + 6), "X", l0 + 4);
+  CHK_FAIL_END
+
+# if !defined __cplusplus || defined __va_arg_pack
+  CHK_FAIL_START
+  sprintf (a.buf1 + (O + 7), "%d", num1);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  snprintf (a.buf1 + (O + 7), 3, "%d", num2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  snprintf (a.buf1 + (O + 7), l0 + 3, "%d", num2);
+  CHK_FAIL_END
+# endif
+
+  memcpy (a.buf1, str1 + (3 - O), 8 + O);
+  CHK_FAIL_START
+  strcat (a.buf1, "AB");
+  CHK_FAIL_END
+
+  memcpy (a.buf1, str1 + (4 - O), 7 + O);
+  CHK_FAIL_START
+  strncat (a.buf1, "ZYXWV", l0 + 3);
+  CHK_FAIL_END
+#endif
+
+
+  /* These ops can be done without runtime checking of object size.  */
+  wmemcpy (wbuf, L"abcdefghij", 10);
+  wmemmove (wbuf + 1, wbuf, 9);
+  if (wmemcmp (wbuf, L"aabcdefghi", 10))
+    FAIL ();
+
+  if (wmempcpy (wbuf + 5, L"abcde", 5) != wbuf + 10
+      || wmemcmp (wbuf, L"aabcdabcde", 10))
+    FAIL ();
+
+  wmemset (wbuf + 8, L'j', 2);
+  if (wmemcmp (wbuf, L"aabcdabcjj", 10))
+    FAIL ();
+
+  wcscpy (wbuf + 4, L"EDCBA");
+  if (wmemcmp (wbuf, L"aabcEDCBA", 10))
+    FAIL ();
+
+  if (wcpcpy (wbuf + 8, L"F") != wbuf + 9 || wmemcmp (wbuf, L"aabcEDCBF", 10))
+    FAIL ();
+
+  wcsncpy (wbuf + 6, L"X", 4);
+  if (wmemcmp (wbuf, L"aabcEDX\0\0", 10))
+    FAIL ();
+
+  if (swprintf (wbuf + 7, 3, L"%ls", L"987654") >= 0
+      || wmemcmp (wbuf, L"aabcEDX98", 10))
+    FAIL ();
+
+  if (swprintf (wbuf + 7, 3, L"64") != 2
+      || wmemcmp (wbuf, L"aabcEDX64", 10))
+    FAIL ();
+
+  /* These ops need runtime checking, but shouldn't __chk_fail.  */
+  wmemcpy (wbuf, L"abcdefghij", l0 + 10);
+  wmemmove (wbuf + 1, wbuf, l0 + 9);
+  if (wmemcmp (wbuf, L"aabcdefghi", 10))
+    FAIL ();
+
+  if (wmempcpy (wbuf + 5, L"abcde", l0 + 5) != wbuf + 10
+      || wmemcmp (wbuf, L"aabcdabcde", 10))
+    FAIL ();
+
+  wmemset (wbuf + 8, L'j', l0 + 2);
+  if (wmemcmp (wbuf, L"aabcdabcjj", 10))
+    FAIL ();
+
+  wcscpy (wbuf + 4, wstr1 + 5);
+  if (wmemcmp (wbuf, L"aabcEDCBA", 10))
+    FAIL ();
+
+  if (wcpcpy (wbuf + 8, wstr2) != wbuf + 9 || wmemcmp (wbuf, L"aabcEDCBF", 10))
+    FAIL ();
+
+  wcsncpy (wbuf + 6, L"X", l0 + 4);
+  if (wmemcmp (wbuf, L"aabcEDX\0\0", 10))
+    FAIL ();
+
+  if (wcpncpy (wbuf + 5, L"cd", l0 + 5) != wbuf + 7
+      || wmemcmp (wbuf, L"aabcEcd\0\0", 10))
+    FAIL ();
+
+  if (swprintf (wbuf + 7, 3, L"%d", num2) >= 0
+      || wmemcmp (wbuf, L"aabcEcd98", 10))
+    FAIL ();
+
+  wbuf[l0 + 8] = L'\0';
+  wcscat (wbuf, L"A");
+  if (wmemcmp (wbuf, L"aabcEcd9A", 10))
+    FAIL ();
+
+  wbuf[l0 + 7] = L'\0';
+  wcsncat (wbuf, L"ZYXWV", l0 + 2);
+  if (wmemcmp (wbuf, L"aabcEcdZY", 10))
+    FAIL ();
+
+  wmemcpy (wa.buf1, L"abcdefghij", l0 + 10);
+  wmemmove (wa.buf1 + 1, wa.buf1, l0 + 9);
+  if (wmemcmp (wa.buf1, L"aabcdefghi", 10))
+    FAIL ();
+
+  if (wmempcpy (wa.buf1 + 5, L"abcde", l0 + 5) != wa.buf1 + 10
+      || wmemcmp (wa.buf1, L"aabcdabcde", 10))
+    FAIL ();
+
+  wmemset (wa.buf1 + 8, L'j', l0 + 2);
+  if (wmemcmp (wa.buf1, L"aabcdabcjj", 10))
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL < 2
+  /* The following tests are supposed to crash with -D_FORTIFY_SOURCE=2
+     and sufficient GCC support, as the string operations overflow
+     from a.buf1 into a.buf2.  */
+  wcscpy (wa.buf1 + 4, wstr1 + 5);
+  if (wmemcmp (wa.buf1, L"aabcEDCBA", 10))
+    FAIL ();
+
+  if (wcpcpy (wa.buf1 + 8, wstr2) != wa.buf1 + 9
+      || wmemcmp (wa.buf1, L"aabcEDCBF", 10))
+    FAIL ();
+
+  wcsncpy (wa.buf1 + 6, L"X", l0 + 4);
+  if (wmemcmp (wa.buf1, L"aabcEDX\0\0", 10))
+    FAIL ();
+
+  if (swprintf (wa.buf1 + 7, 3, L"%d", num2) >= 0
+      || wmemcmp (wa.buf1, L"aabcEDX98", 10))
+    FAIL ();
+
+  wa.buf1[l0 + 8] = L'\0';
+  wcscat (wa.buf1, L"A");
+  if (wmemcmp (wa.buf1, L"aabcEDX9A", 10))
+    FAIL ();
+
+  wa.buf1[l0 + 7] = L'\0';
+  wcsncat (wa.buf1, L"ZYXWV", l0 + 2);
+  if (wmemcmp (wa.buf1, L"aabcEDXZY", 10))
+    FAIL ();
+
+#endif
+
+#if __USE_FORTIFY_LEVEL >= 1
+  /* Now check if all buffer overflows are caught at runtime.
+     N.B. All tests involving a length parameter need to be done
+     twice: once with the length a compile-time constant, once without.  */
+
+  CHK_FAIL_START
+  wmemcpy (wbuf + 1, L"abcdefghij", 10);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemcpy (wbuf + 1, L"abcdefghij", l0 + 10);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemcpy (wbuf + 9, L"abcdefghij", 10);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemcpy (wbuf + 9, L"abcdefghij", l0 + 10);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemmove (wbuf + 2, wbuf + 1, 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemmove (wbuf + 2, wbuf + 1, l0 + 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wp = wmempcpy (wbuf + 6, L"abcde", 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wp = wmempcpy (wbuf + 6, L"abcde", l0 + 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemset (wbuf + 9, L'j', 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemset (wbuf + 9, L'j', l0 + 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wcscpy (wbuf + 5, wstr1 + 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wp = wcpcpy (wbuf + 9, wstr2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wcsncpy (wbuf + 7, L"X", 4);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wcsncpy (wbuf + 7, L"X", l0 + 4);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wcsncpy (wbuf + 9, L"XABCDEFGH", 8);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wcpncpy (wbuf + 9, L"XABCDEFGH", 8);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wcpncpy (wbuf + 6, L"cd", 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wcpncpy (wbuf + 6, L"cd", l0 + 5);
+  CHK_FAIL_END
+
+  wmemcpy (wbuf, wstr1 + 2, 9);
+  CHK_FAIL_START
+  wcscat (wbuf, L"AB");
+  CHK_FAIL_END
+
+  wmemcpy (wbuf, wstr1 + 3, 8);
+  CHK_FAIL_START
+  wcsncat (wbuf, L"ZYXWV", l0 + 3);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemcpy (wa.buf1 + 1, L"abcdefghij", 10);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemcpy (wa.buf1 + 1, L"abcdefghij", l0 + 10);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemmove (wa.buf1 + 2, wa.buf1 + 1, 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemmove (wa.buf1 + 2, wa.buf1 + 1, l0 + 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wp = wmempcpy (wa.buf1 + 6, L"abcde", 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wp = wmempcpy (wa.buf1 + 6, L"abcde", l0 + 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemset (wa.buf1 + 9, L'j', 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wmemset (wa.buf1 + 9, L'j', l0 + 2);
+  CHK_FAIL_END
+
+#if __USE_FORTIFY_LEVEL >= 2
+# define O 0
+#else
+# define O 1
+#endif
+
+  CHK_FAIL_START
+  wcscpy (wa.buf1 + (O + 4), wstr1 + 5);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wp = wcpcpy (wa.buf1 + (O + 8), wstr2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wcsncpy (wa.buf1 + (O + 6), L"X", 4);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  wcsncpy (wa.buf1 + (O + 6), L"X", l0 + 4);
+  CHK_FAIL_END
+
+  wmemcpy (wa.buf1, wstr1 + (3 - O), 8 + O);
+  CHK_FAIL_START
+  wcscat (wa.buf1, L"AB");
+  CHK_FAIL_END
+
+  wmemcpy (wa.buf1, wstr1 + (4 - O), 7 + O);
+  CHK_FAIL_START
+  wcsncat (wa.buf1, L"ZYXWV", l0 + 3);
+  CHK_FAIL_END
+#endif
+
+
+  /* Now checks for %n protection.  */
+
+  /* Constant literals passed directly are always ok
+     (even with warnings about possible bugs from GCC).  */
+  int n1, n2;
+  if (sprintf (buf, "%s%n%s%n", str2, &n1, str2, &n2) != 2
+      || n1 != 1 || n2 != 2)
+    FAIL ();
+
+  /* In this case the format string is not known at compile time,
+     but resides in read-only memory, so is ok.  */
+  if (snprintf (buf, 4, str3, str2, &n1, str2, &n2) != 2
+      || n1 != 1 || n2 != 2)
+    FAIL ();
+
+  strcpy (buf2 + 2, "%n%s%n");
+  /* When the format string is writable and contains %n,
+     with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
+  CHK_FAIL2_START
+  if (sprintf (buf, buf2, str2, &n1, str2, &n1) != 2)
+    FAIL ();
+  CHK_FAIL2_END
+
+  CHK_FAIL2_START
+  if (snprintf (buf, 3, buf2, str2, &n1, str2, &n1) != 2)
+    FAIL ();
+  CHK_FAIL2_END
+
+  /* But if there is no %n, even writable format string
+     should work.  */
+  buf2[6] = '\0';
+  if (sprintf (buf, buf2 + 4, str2) != 1)
+    FAIL ();
+
+  /* Constant literals passed directly are always ok
+     (even with warnings about possible bugs from GCC).  */
+  if (printf ("%s%n%s%n", str4, &n1, str5, &n2) != 14
+      || n1 != 7 || n2 != 14)
+    FAIL ();
+
+  /* In this case the format string is not known at compile time,
+     but resides in read-only memory, so is ok.  */
+  if (printf (str3, str4, &n1, str5, &n2) != 14
+      || n1 != 7 || n2 != 14)
+    FAIL ();
+
+  strcpy (buf2 + 2, "%n%s%n");
+  /* When the format string is writable and contains %n,
+     with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
+  CHK_FAIL2_START
+  if (printf (buf2, str4, &n1, str5, &n1) != 14)
+    FAIL ();
+  CHK_FAIL2_END
+
+  /* But if there is no %n, even writable format string
+     should work.  */
+  buf2[6] = '\0';
+  if (printf (buf2 + 4, str5) != 7)
+    FAIL ();
+
+  FILE *fp = stdout;
+
+  /* Constant literals passed directly are always ok
+     (even with warnings about possible bugs from GCC).  */
+  if (fprintf (fp, "%s%n%s%n", str4, &n1, str5, &n2) != 14
+      || n1 != 7 || n2 != 14)
+    FAIL ();
+
+  /* In this case the format string is not known at compile time,
+     but resides in read-only memory, so is ok.  */
+  if (fprintf (fp, str3, str4, &n1, str5, &n2) != 14
+      || n1 != 7 || n2 != 14)
+    FAIL ();
+
+  strcpy (buf2 + 2, "%n%s%n");
+  /* When the format string is writable and contains %n,
+     with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
+  CHK_FAIL2_START
+  if (fprintf (fp, buf2, str4, &n1, str5, &n1) != 14)
+    FAIL ();
+  CHK_FAIL2_END
+
+  /* But if there is no %n, even writable format string
+     should work.  */
+  buf2[6] = '\0';
+  if (fprintf (fp, buf2 + 4, str5) != 7)
+    FAIL ();
+
+  char *my_ptr = NULL;
+  strcpy (buf2 + 2, "%n%s%n");
+  /* When the format string is writable and contains %n,
+     with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
+  CHK_FAIL2_START
+  if (asprintf (&my_ptr, buf2, str4, &n1, str5, &n1) != 14)
+    FAIL ();
+  else
+    free (my_ptr);
+  CHK_FAIL2_END
+
+  struct obstack obs;
+  obstack_init (&obs);
+  CHK_FAIL2_START
+  if (obstack_printf (&obs, buf2, str4, &n1, str5, &n1) != 14)
+    FAIL ();
+  CHK_FAIL2_END
+  obstack_free (&obs, NULL);
+
+  my_ptr = NULL;
+  if (asprintf (&my_ptr, "%s%n%s%n", str4, &n1, str5, &n1) != 14)
+    FAIL ();
+  else
+    free (my_ptr);
+
+  obstack_init (&obs);
+  if (obstack_printf (&obs, "%s%n%s%n", str4, &n1, str5, &n1) != 14)
+    FAIL ();
+  obstack_free (&obs, NULL);
+
+  if (freopen (temp_filename, "r", stdin) == NULL)
+    {
+      puts ("could not open temporary file");
+      exit (1);
+    }
+
+  if (gets (buf) != buf || memcmp (buf, "abcdefgh", 9))
+    FAIL ();
+  if (gets (buf) != buf || memcmp (buf, "ABCDEFGHI", 10))
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  if (gets (buf) != buf)
+    FAIL ();
+  CHK_FAIL_END
+#endif
+
+  rewind (stdin);
+
+  if (fgets (buf, buf_size, stdin) != buf
+      || memcmp (buf, "abcdefgh\n", 10))
+    FAIL ();
+  if (fgets (buf, buf_size, stdin) != buf || memcmp (buf, "ABCDEFGHI", 10))
+    FAIL ();
+
+  rewind (stdin);
+
+  if (fgets (buf, l0 + buf_size, stdin) != buf
+      || memcmp (buf, "abcdefgh\n", 10))
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  if (fgets (buf, buf_size + 1, stdin) != buf)
+    FAIL ();
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  if (fgets (buf, l0 + buf_size + 1, stdin) != buf)
+    FAIL ();
+  CHK_FAIL_END
+#endif
+
+  rewind (stdin);
+
+  if (fgets_unlocked (buf, buf_size, stdin) != buf
+      || memcmp (buf, "abcdefgh\n", 10))
+    FAIL ();
+  if (fgets_unlocked (buf, buf_size, stdin) != buf
+      || memcmp (buf, "ABCDEFGHI", 10))
+    FAIL ();
+
+  rewind (stdin);
+
+  if (fgets_unlocked (buf, l0 + buf_size, stdin) != buf
+      || memcmp (buf, "abcdefgh\n", 10))
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  if (fgets_unlocked (buf, buf_size + 1, stdin) != buf)
+    FAIL ();
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  if (fgets_unlocked (buf, l0 + buf_size + 1, stdin) != buf)
+    FAIL ();
+  CHK_FAIL_END
+#endif
+
+  rewind (stdin);
+
+  if (fread (buf, 1, buf_size, stdin) != buf_size
+      || memcmp (buf, "abcdefgh\nA", 10))
+    FAIL ();
+  if (fread (buf, buf_size, 1, stdin) != 1
+      || memcmp (buf, "BCDEFGHI\na", 10))
+    FAIL ();
+
+  rewind (stdin);
+
+  if (fread (buf, l0 + 1, buf_size, stdin) != buf_size
+      || memcmp (buf, "abcdefgh\nA", 10))
+    FAIL ();
+  if (fread (buf, buf_size, l0 + 1, stdin) != 1
+      || memcmp (buf, "BCDEFGHI\na", 10))
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  if (fread (buf, 1, buf_size + 1, stdin) != buf_size + 1)
+    FAIL ();
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  if (fread (buf, buf_size + 1, l0 + 1, stdin) != 1)
+    FAIL ();
+  CHK_FAIL_END
+#endif
+
+  rewind (stdin);
+
+  if (fread_unlocked (buf, 1, buf_size, stdin) != buf_size
+      || memcmp (buf, "abcdefgh\nA", 10))
+    FAIL ();
+  if (fread_unlocked (buf, buf_size, 1, stdin) != 1
+      || memcmp (buf, "BCDEFGHI\na", 10))
+    FAIL ();
+
+  rewind (stdin);
+
+  if (fread_unlocked (buf, 1, 4, stdin) != 4
+      || memcmp (buf, "abcdFGHI\na", 10))
+    FAIL ();
+  if (fread_unlocked (buf, 4, 1, stdin) != 1
+      || memcmp (buf, "efghFGHI\na", 10))
+    FAIL ();
+
+  rewind (stdin);
+
+  if (fread_unlocked (buf, l0 + 1, buf_size, stdin) != buf_size
+      || memcmp (buf, "abcdefgh\nA", 10))
+    FAIL ();
+  if (fread_unlocked (buf, buf_size, l0 + 1, stdin) != 1
+      || memcmp (buf, "BCDEFGHI\na", 10))
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  if (fread_unlocked (buf, 1, buf_size + 1, stdin) != buf_size + 1)
+    FAIL ();
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  if (fread_unlocked (buf, buf_size + 1, l0 + 1, stdin) != 1)
+    FAIL ();
+  CHK_FAIL_END
+#endif
+
+  lseek (fileno (stdin), 0, SEEK_SET);
+
+  if (read (fileno (stdin), buf, buf_size - 1) != buf_size - 1
+      || memcmp (buf, "abcdefgh\n", 9))
+    FAIL ();
+  if (read (fileno (stdin), buf, buf_size - 1) != buf_size - 1
+      || memcmp (buf, "ABCDEFGHI", 9))
+    FAIL ();
+
+  lseek (fileno (stdin), 0, SEEK_SET);
+
+  if (read (fileno (stdin), buf, l0 + buf_size - 1) != buf_size - 1
+      || memcmp (buf, "abcdefgh\n", 9))
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  if (read (fileno (stdin), buf, buf_size + 1) != buf_size + 1)
+    FAIL ();
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  if (read (fileno (stdin), buf, l0 + buf_size + 1) != buf_size + 1)
+    FAIL ();
+  CHK_FAIL_END
+#endif
+
+  if (pread (fileno (stdin), buf, buf_size - 1, buf_size - 2)
+      != buf_size - 1
+      || memcmp (buf, "\nABCDEFGH", 9))
+    FAIL ();
+  if (pread (fileno (stdin), buf, buf_size - 1, 0) != buf_size - 1
+      || memcmp (buf, "abcdefgh\n", 9))
+    FAIL ();
+  if (pread (fileno (stdin), buf, l0 + buf_size - 1, buf_size - 3)
+      != buf_size - 1
+      || memcmp (buf, "h\nABCDEFG", 9))
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  if (pread (fileno (stdin), buf, buf_size + 1, 2 * buf_size)
+      != buf_size + 1)
+    FAIL ();
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  if (pread (fileno (stdin), buf, l0 + buf_size + 1, 2 * buf_size)
+      != buf_size + 1)
+    FAIL ();
+  CHK_FAIL_END
+#endif
+
+  if (pread64 (fileno (stdin), buf, buf_size - 1, buf_size - 2)
+      != buf_size - 1
+      || memcmp (buf, "\nABCDEFGH", 9))
+    FAIL ();
+  if (pread64 (fileno (stdin), buf, buf_size - 1, 0) != buf_size - 1
+      || memcmp (buf, "abcdefgh\n", 9))
+    FAIL ();
+  if (pread64 (fileno (stdin), buf, l0 + buf_size - 1, buf_size - 3)
+      != buf_size - 1
+      || memcmp (buf, "h\nABCDEFG", 9))
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  if (pread64 (fileno (stdin), buf, buf_size + 1, 2 * buf_size)
+      != buf_size + 1)
+    FAIL ();
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  if (pread64 (fileno (stdin), buf, l0 + buf_size + 1, 2 * buf_size)
+      != buf_size + 1)
+    FAIL ();
+  CHK_FAIL_END
+#endif
+
+  if (freopen (temp_filename, "r", stdin) == NULL)
+    {
+      puts ("could not open temporary file");
+      exit (1);
+    }
+
+  if (fseek (stdin, 9 + 10 + 11, SEEK_SET))
+    {
+      puts ("could not seek in test file");
+      exit (1);
+    }
+
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  if (gets (buf) != buf)
+    FAIL ();
+  CHK_FAIL_END
+#endif
+
+  /* Check whether missing N$ formats are detected.  */
+  CHK_FAIL2_START
+  printf ("%3$d\n", 1, 2, 3, 4);
+  CHK_FAIL2_END
+
+  CHK_FAIL2_START
+  fprintf (stdout, "%3$d\n", 1, 2, 3, 4);
+  CHK_FAIL2_END
+
+  CHK_FAIL2_START
+  sprintf (buf, "%3$d\n", 1, 2, 3, 4);
+  CHK_FAIL2_END
+
+  CHK_FAIL2_START
+  snprintf (buf, buf_size, "%3$d\n", 1, 2, 3, 4);
+  CHK_FAIL2_END
+
+  int sp[2];
+  if (socketpair (PF_UNIX, SOCK_STREAM, 0, sp))
+    FAIL ();
+  else
+    {
+      const char *sendstr = "abcdefgh\nABCDEFGH\n0123456789\n";
+      if ((size_t) send (sp[0], sendstr, strlen (sendstr), 0)
+	  != strlen (sendstr))
+	FAIL ();
+
+      char recvbuf[12];
+      if (recv (sp[1], recvbuf, sizeof recvbuf, MSG_PEEK)
+	  != sizeof recvbuf
+	  || memcmp (recvbuf, sendstr, sizeof recvbuf) != 0)
+	FAIL ();
+
+      if (recv (sp[1], recvbuf + 6, l0 + sizeof recvbuf - 7, MSG_PEEK)
+	  != sizeof recvbuf - 7
+	  || memcmp (recvbuf + 6, sendstr, sizeof recvbuf - 7) != 0)
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      CHK_FAIL_START
+      if (recv (sp[1], recvbuf + 1, sizeof recvbuf, MSG_PEEK)
+	  != sizeof recvbuf)
+	FAIL ();
+      CHK_FAIL_END
+
+      CHK_FAIL_START
+      if (recv (sp[1], recvbuf + 4, l0 + sizeof recvbuf - 3, MSG_PEEK)
+	  != sizeof recvbuf - 3)
+	FAIL ();
+      CHK_FAIL_END
+#endif
+
+      socklen_t sl;
+      struct sockaddr_un sa_un;
+
+      sl = sizeof (sa_un);
+      if (recvfrom (sp[1], recvbuf, sizeof recvbuf, MSG_PEEK,
+		    (struct sockaddr *) &sa_un, &sl)
+	  != sizeof recvbuf
+	  || memcmp (recvbuf, sendstr, sizeof recvbuf) != 0)
+	FAIL ();
+
+      sl = sizeof (sa_un);
+      if (recvfrom (sp[1], recvbuf + 6, l0 + sizeof recvbuf - 7, MSG_PEEK,
+		    (struct sockaddr *) &sa_un, &sl) != sizeof recvbuf - 7
+	  || memcmp (recvbuf + 6, sendstr, sizeof recvbuf - 7) != 0)
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      CHK_FAIL_START
+      sl = sizeof (sa_un);
+      if (recvfrom (sp[1], recvbuf + 1, sizeof recvbuf, MSG_PEEK,
+		    (struct sockaddr *) &sa_un, &sl) != sizeof recvbuf)
+	FAIL ();
+      CHK_FAIL_END
+
+      CHK_FAIL_START
+      sl = sizeof (sa_un);
+      if (recvfrom (sp[1], recvbuf + 4, l0 + sizeof recvbuf - 3, MSG_PEEK,
+		    (struct sockaddr *) &sa_un, &sl) != sizeof recvbuf - 3)
+	FAIL ();
+      CHK_FAIL_END
+#endif
+
+      close (sp[0]);
+      close (sp[1]);
+    }
+
+  char fname[] = "/tmp/tst-chk1-dir-XXXXXX\0foo";
+  char *enddir = strchr (fname, '\0');
+  if (mkdtemp (fname) == NULL)
+    {
+      printf ("mkdtemp failed: %m\n");
+      return 1;
+    }
+  *enddir = '/';
+  if (symlink ("bar", fname) != 0)
+    FAIL ();
+
+  char readlinkbuf[4];
+  if (readlink (fname, readlinkbuf, 4) != 3
+      || memcmp (readlinkbuf, "bar", 3) != 0)
+    FAIL ();
+  if (readlink (fname, readlinkbuf + 1, l0 + 3) != 3
+      || memcmp (readlinkbuf, "bbar", 4) != 0)
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  if (readlink (fname, readlinkbuf + 2, l0 + 3) != 3)
+    FAIL ();
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  if (readlink (fname, readlinkbuf + 3, 4) != 3)
+    FAIL ();
+  CHK_FAIL_END
+#endif
+
+  int tmpfd = open ("/tmp", O_RDONLY | O_DIRECTORY);
+  if (tmpfd < 0)
+    FAIL ();
+
+  if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf, 4) != 3
+      || memcmp (readlinkbuf, "bar", 3) != 0)
+    FAIL ();
+  if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 1,
+		  l0 + 3) != 3
+      || memcmp (readlinkbuf, "bbar", 4) != 0)
+    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 2,
+		  l0 + 3) != 3)
+    FAIL ();
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 3,
+		  4) != 3)
+    FAIL ();
+  CHK_FAIL_END
+#endif
+
+  close (tmpfd);
+
+  char *cwd1 = getcwd (NULL, 0);
+  if (cwd1 == NULL)
+    FAIL ();
+
+  char *cwd2 = getcwd (NULL, 250);
+  if (cwd2 == NULL)
+    FAIL ();
+
+  if (cwd1 && cwd2)
+    {
+      if (strcmp (cwd1, cwd2) != 0)
+	FAIL ();
+
+      *enddir = '\0';
+      if (chdir (fname))
+	FAIL ();
+
+      char *cwd3 = getcwd (NULL, 0);
+      if (cwd3 == NULL)
+	FAIL ();
+      if (strcmp (fname, cwd3) != 0)
+	printf ("getcwd after chdir is '%s' != '%s',"
+		"get{c,}wd tests skipped\n", cwd3, fname);
+      else
+	{
+	  char getcwdbuf[sizeof fname - 3];
+
+	  char *cwd4 = getcwd (getcwdbuf, sizeof getcwdbuf);
+	  if (cwd4 != getcwdbuf
+	      || strcmp (getcwdbuf, fname) != 0)
+	    FAIL ();
+
+	  cwd4 = getcwd (getcwdbuf + 1, l0 + sizeof getcwdbuf - 1);
+	  if (cwd4 != getcwdbuf + 1
+	      || getcwdbuf[0] != fname[0]
+	      || strcmp (getcwdbuf + 1, fname) != 0)
+	    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+	  CHK_FAIL_START
+	  if (getcwd (getcwdbuf + 2, l0 + sizeof getcwdbuf)
+	      != getcwdbuf + 2)
+	    FAIL ();
+	  CHK_FAIL_END
+
+	  CHK_FAIL_START
+	  if (getcwd (getcwdbuf + 2, sizeof getcwdbuf)
+	      != getcwdbuf + 2)
+	    FAIL ();
+	  CHK_FAIL_END
+#endif
+
+	  if (getwd (getcwdbuf) != getcwdbuf
+	      || strcmp (getcwdbuf, fname) != 0)
+	    FAIL ();
+
+	  if (getwd (getcwdbuf + 1) != getcwdbuf + 1
+	      || strcmp (getcwdbuf + 1, fname) != 0)
+	    FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+	  CHK_FAIL_START
+	  if (getwd (getcwdbuf + 2) != getcwdbuf + 2)
+	    FAIL ();
+	  CHK_FAIL_END
+#endif
+	}
+
+      if (chdir (cwd1) != 0)
+	FAIL ();
+      free (cwd3);
+    }
+
+  free (cwd1);
+  free (cwd2);
+  *enddir = '/';
+  if (unlink (fname) != 0)
+    FAIL ();
+
+  *enddir = '\0';
+  if (rmdir (fname) != 0)
+    FAIL ();
+
+
+#if PATH_MAX > 0
+  char largebuf[PATH_MAX];
+  char *realres = realpath (".", largebuf);
+  if (realres != largebuf)
+    FAIL ();
+
+# if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  char realbuf[1];
+  realres = realpath (".", realbuf);
+  if (realres != realbuf)
+    FAIL ();
+  CHK_FAIL_END
+# endif
+#endif
+
+  if (setlocale (LC_ALL, "de_DE.UTF-8") != NULL)
+    {
+      assert (MB_CUR_MAX <= 10);
+
+      /* First a simple test.  */
+      char enough[10];
+      if (wctomb (enough, L'A') != 1)
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      /* We know the wchar_t encoding is ISO 10646.  So pick a
+	 character which has a multibyte representation which does not
+	 fit.  */
+      CHK_FAIL_START
+      char smallbuf[2];
+      if (wctomb (smallbuf, L'\x100') != 2)
+	FAIL ();
+      CHK_FAIL_END
+#endif
+
+      mbstate_t s;
+      memset (&s, '\0', sizeof (s));
+      if (wcrtomb (enough, L'D', &s) != 1 || enough[0] != 'D')
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      /* We know the wchar_t encoding is ISO 10646.  So pick a
+	 character which has a multibyte representation which does not
+	 fit.  */
+      CHK_FAIL_START
+      char smallbuf[2];
+      if (wcrtomb (smallbuf, L'\x100', &s) != 2)
+	FAIL ();
+      CHK_FAIL_END
+#endif
+
+      wchar_t wenough[10];
+      memset (&s, '\0', sizeof (s));
+      const char *cp = "A";
+      if (mbsrtowcs (wenough, &cp, 10, &s) != 1
+	  || wcscmp (wenough, L"A") != 0)
+	FAIL ();
+
+      cp = "BC";
+      if (mbsrtowcs (wenough, &cp, l0 + 10, &s) != 2
+	  || wcscmp (wenough, L"BC") != 0)
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      CHK_FAIL_START
+      wchar_t wsmallbuf[2];
+      cp = "ABC";
+      mbsrtowcs (wsmallbuf, &cp, 10, &s);
+      CHK_FAIL_END
+#endif
+
+      cp = "A";
+      if (mbstowcs (wenough, cp, 10) != 1
+	  || wcscmp (wenough, L"A") != 0)
+	FAIL ();
+
+      cp = "DEF";
+      if (mbstowcs (wenough, cp, l0 + 10) != 3
+	  || wcscmp (wenough, L"DEF") != 0)
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      CHK_FAIL_START
+      wchar_t wsmallbuf[2];
+      cp = "ABC";
+      mbstowcs (wsmallbuf, cp, 10);
+      CHK_FAIL_END
+#endif
+
+      memset (&s, '\0', sizeof (s));
+      cp = "ABC";
+      wcscpy (wenough, L"DEF");
+      if (mbsnrtowcs (wenough, &cp, 1, 10, &s) != 1
+	  || wcscmp (wenough, L"AEF") != 0)
+	FAIL ();
+
+      cp = "IJ";
+      if (mbsnrtowcs (wenough, &cp, 1, l0 + 10, &s) != 1
+	  || wcscmp (wenough, L"IEF") != 0)
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      CHK_FAIL_START
+      wchar_t wsmallbuf[2];
+      cp = "ABC";
+      mbsnrtowcs (wsmallbuf, &cp, 3, 10, &s);
+      CHK_FAIL_END
+#endif
+
+      memset (&s, '\0', sizeof (s));
+      const wchar_t *wcp = L"A";
+      if (wcsrtombs (enough, &wcp, 10, &s) != 1
+	  || strcmp (enough, "A") != 0)
+	FAIL ();
+
+      wcp = L"BC";
+      if (wcsrtombs (enough, &wcp, l0 + 10, &s) != 2
+	  || strcmp (enough, "BC") != 0)
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      CHK_FAIL_START
+      char smallbuf[2];
+      wcp = L"ABC";
+      wcsrtombs (smallbuf, &wcp, 10, &s);
+      CHK_FAIL_END
+#endif
+
+      memset (enough, 'Z', sizeof (enough));
+      wcp = L"EF";
+      if (wcstombs (enough, wcp, 10) != 2
+	  || strcmp (enough, "EF") != 0)
+	FAIL ();
+
+      wcp = L"G";
+      if (wcstombs (enough, wcp, l0 + 10) != 1
+	  || strcmp (enough, "G") != 0)
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      CHK_FAIL_START
+      char smallbuf[2];
+      wcp = L"ABC";
+      wcstombs (smallbuf, wcp, 10);
+      CHK_FAIL_END
+#endif
+
+      memset (&s, '\0', sizeof (s));
+      wcp = L"AB";
+      if (wcsnrtombs (enough, &wcp, 1, 10, &s) != 1
+	  || strcmp (enough, "A") != 0)
+	FAIL ();
+
+      wcp = L"BCD";
+      if (wcsnrtombs (enough, &wcp, 1, l0 + 10, &s) != 1
+	  || strcmp (enough, "B") != 0)
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      CHK_FAIL_START
+      char smallbuf[2];
+      wcp = L"ABC";
+      wcsnrtombs (smallbuf, &wcp, 3, 10, &s);
+      CHK_FAIL_END
+#endif
+    }
+  else
+    {
+      puts ("cannot set locale");
+      ret = 1;
+    }
+
+  int fd = posix_openpt (O_RDWR);
+  if (fd != -1)
+    {
+      char enough[1000];
+      if (ptsname_r (fd, enough, sizeof (enough)) != 0)
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      CHK_FAIL_START
+      char smallbuf[2];
+      if (ptsname_r (fd, smallbuf, sizeof (smallbuf) + 1) == 0)
+	FAIL ();
+      CHK_FAIL_END
+#endif
+      close (fd);
+    }
+
+#if PATH_MAX > 0
+  confstr (_CS_GNU_LIBC_VERSION, largebuf, sizeof (largebuf));
+# if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  char smallbuf[1];
+  confstr (_CS_GNU_LIBC_VERSION, smallbuf, sizeof (largebuf));
+  CHK_FAIL_END
+# endif
+#endif
+
+  gid_t grpslarge[5];
+  int ngr = getgroups (5, grpslarge);
+  asm volatile ("" : : "r" (ngr));
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  char smallbuf[1];
+  ngr = getgroups (5, (gid_t *) smallbuf);
+  asm volatile ("" : : "r" (ngr));
+  CHK_FAIL_END
+#endif
+
+  fd = open (_PATH_TTY, O_RDONLY);
+  if (fd != -1)
+    {
+      char enough[1000];
+      if (ttyname_r (fd, enough, sizeof (enough)) != 0)
+	FAIL ();
+
+#if __USE_FORTIFY_LEVEL >= 1
+      CHK_FAIL_START
+      char smallbuf[2];
+      if (ttyname_r (fd, smallbuf, sizeof (smallbuf) + 1) == 0)
+	FAIL ();
+      CHK_FAIL_END
+#endif
+      close (fd);
+    }
+
+  char hostnamelarge[1000];
+  gethostname (hostnamelarge, sizeof (hostnamelarge));
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  char smallbuf[1];
+  gethostname (smallbuf, sizeof (hostnamelarge));
+  CHK_FAIL_END
+#endif
+
+  char loginlarge[1000];
+  getlogin_r (loginlarge, sizeof (hostnamelarge));
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  char smallbuf[1];
+  getlogin_r (smallbuf, sizeof (loginlarge));
+  CHK_FAIL_END
+#endif
+
+  char domainnamelarge[1000];
+  int res = getdomainname (domainnamelarge, sizeof (domainnamelarge));
+  asm volatile ("" : : "r" (res));
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  char smallbuf[1];
+  res = getdomainname (smallbuf, sizeof (domainnamelarge));
+  asm volatile ("" : : "r" (res));
+  CHK_FAIL_END
+#endif
+
+  fd_set s;
+  FD_ZERO (&s);
+
+  FD_SET (FD_SETSIZE - 1, &s);
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  FD_SET (FD_SETSIZE, &s);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  FD_SET (l0 + FD_SETSIZE, &s);
+  CHK_FAIL_END
+#endif
+
+  FD_CLR (FD_SETSIZE - 1, &s);
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  FD_CLR (FD_SETSIZE, &s);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  FD_SET (l0 + FD_SETSIZE, &s);
+  CHK_FAIL_END
+#endif
+
+  FD_ISSET (FD_SETSIZE - 1, &s);
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  FD_ISSET (FD_SETSIZE, &s);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  FD_ISSET (l0 + FD_SETSIZE, &s);
+  CHK_FAIL_END
+#endif
+
+  struct pollfd fds[1];
+  fds[0].fd = STDOUT_FILENO;
+  fds[0].events = POLLOUT;
+  poll (fds, 1, 0);
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  poll (fds, 2, 0);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  poll (fds, l0 + 2, 0);
+  CHK_FAIL_END
+#endif
+  ppoll (fds, 1, NULL, NULL);
+#if __USE_FORTIFY_LEVEL >= 1
+  CHK_FAIL_START
+  ppoll (fds, 2, NULL, NULL);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  ppoll (fds, l0 + 2, NULL, NULL);
+  CHK_FAIL_END
+#endif
+
+  return ret;
+}
diff --git a/debug/tst-chk0cc-lfs.cc b/debug/tst-chk0cc-lfs.cc
new file mode 100644
index 0000000000..2460b6baad
--- /dev/null
+++ b/debug/tst-chk0cc-lfs.cc
@@ -0,0 +1,2 @@ 
+#define _FILE_OFFSET_BITS 64
+#include "tst-chk0.c"
diff --git a/debug/tst-chk0cc.cc b/debug/tst-chk0cc.cc
new file mode 100644
index 0000000000..c467a9f84b
--- /dev/null
+++ b/debug/tst-chk0cc.cc
@@ -0,0 +1 @@ 
+#include "tst-chk0.c"
diff --git a/debug/tst-lfschk1.c b/debug/tst-chk1-lfs.c
similarity index 100%
rename from debug/tst-lfschk1.c
rename to debug/tst-chk1-lfs.c
diff --git a/debug/tst-chk1.c b/debug/tst-chk1.c
index d11e536f87..c09b01df34 100644
--- a/debug/tst-chk1.c
+++ b/debug/tst-chk1.c
@@ -1,1726 +1,2 @@ 
-/* Copyright (C) 2004-2021 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-/* This file tests gets.  Force it to be declared.  */
-#include <features.h>
-#undef __GLIBC_USE_DEPRECATED_GETS
-#define __GLIBC_USE_DEPRECATED_GETS 1
-
-#include <assert.h>
-#include <fcntl.h>
-#include <locale.h>
-#include <obstack.h>
-#include <setjmp.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <wchar.h>
-#include <sys/poll.h>
-#include <sys/select.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-
-
-#define obstack_chunk_alloc malloc
-#define obstack_chunk_free free
-
-char *temp_filename;
-static void do_prepare (void);
-static int do_test (void);
-#define PREPARE(argc, argv) do_prepare ()
-#define TEST_FUNCTION do_test ()
-#include "../test-skeleton.c"
-
-static void
-do_prepare (void)
-{
-  int temp_fd = create_temp_file ("tst-chk1.", &temp_filename);
-  if (temp_fd == -1)
-    {
-      printf ("cannot create temporary file: %m\n");
-      exit (1);
-    }
-
-  const char *strs = "abcdefgh\nABCDEFGHI\nabcdefghij\nABCDEFGHIJ";
-  if ((size_t) write (temp_fd, strs, strlen (strs)) != strlen (strs))
-    {
-      puts ("could not write test strings into file");
-      unlink (temp_filename);
-      exit (1);
-    }
-}
-
-volatile int chk_fail_ok;
-volatile int ret;
-jmp_buf chk_fail_buf;
-
-static void
-handler (int sig)
-{
-  if (chk_fail_ok)
-    {
-      chk_fail_ok = 0;
-      longjmp (chk_fail_buf, 1);
-    }
-  else
-    _exit (127);
-}
-
-#if __USE_FORTIFY_LEVEL == 3
-volatile size_t buf_size = 10;
-#else
-char buf[10];
-wchar_t wbuf[10];
-#define buf_size sizeof (buf)
-#endif
-
-volatile size_t l0;
-volatile char *p;
-volatile wchar_t *wp;
-const char *str1 = "JIHGFEDCBA";
-const char *str2 = "F";
-const char *str3 = "%s%n%s%n";
-const char *str4 = "Hello, ";
-const char *str5 = "World!\n";
-const wchar_t *wstr1 = L"JIHGFEDCBA";
-const wchar_t *wstr2 = L"F";
-const wchar_t *wstr3 = L"%s%n%s%n";
-const wchar_t *wstr4 = L"Hello, ";
-const wchar_t *wstr5 = L"World!\n";
-char buf2[10] = "%s";
-int num1 = 67;
-int num2 = 987654;
-
-#define FAIL() \
-  do { printf ("Failure on line %d\n", __LINE__); ret = 1; } while (0)
-#define CHK_FAIL_START \
-  chk_fail_ok = 1;				\
-  if (! setjmp (chk_fail_buf))			\
-    {
-#define CHK_FAIL_END \
-      chk_fail_ok = 0;				\
-      FAIL ();					\
-    }
-#if __USE_FORTIFY_LEVEL >= 2 && (!defined __cplusplus || defined __va_arg_pack)
-# define CHK_FAIL2_START CHK_FAIL_START
-# define CHK_FAIL2_END CHK_FAIL_END
-#else
-# define CHK_FAIL2_START
-# define CHK_FAIL2_END
-#endif
-
-static int
-do_test (void)
-{
-#if __USE_FORTIFY_LEVEL == 3
-  char *buf = (char *) malloc (buf_size);
-  wchar_t *wbuf = (wchar_t *) malloc (buf_size * sizeof (wchar_t));
-#endif
-  set_fortify_handler (handler);
-
-  struct A { char buf1[9]; char buf2[1]; } a;
-  struct wA { wchar_t buf1[9]; wchar_t buf2[1]; } wa;
-
-  printf ("Test checking routines at fortify level %d\n",
-#ifdef __USE_FORTIFY_LEVEL
-	  (int) __USE_FORTIFY_LEVEL
-#else
-	  0
-#endif
-	  );
-
-#if defined __USE_FORTIFY_LEVEL && !defined __fortify_function
-  printf ("Test skipped");
-  if (l0 == 0)
-    return 0;
-#endif
-
-  /* These ops can be done without runtime checking of object size.  */
-  memcpy (buf, "abcdefghij", 10);
-  memmove (buf + 1, buf, 9);
-  if (memcmp (buf, "aabcdefghi", 10))
-    FAIL ();
-
-  memcpy (buf, "abcdefghij", 10);
-  bcopy (buf, buf + 1, 9);
-  if (memcmp (buf, "aabcdefghi", 10))
-    FAIL ();
-
-  if (mempcpy (buf + 5, "abcde", 5) != buf + 10
-      || memcmp (buf, "aabcdabcde", 10))
-    FAIL ();
-
-  memset (buf + 8, 'j', 2);
-  if (memcmp (buf, "aabcdabcjj", 10))
-    FAIL ();
-
-  bzero (buf + 8, 2);
-  if (memcmp (buf, "aabcdabc\0\0", 10))
-    FAIL ();
-
-  explicit_bzero (buf + 6, 4);
-  if (memcmp (buf, "aabcda\0\0\0\0", 10))
-    FAIL ();
-
-  strcpy (buf + 4, "EDCBA");
-  if (memcmp (buf, "aabcEDCBA", 10))
-    FAIL ();
-
-  if (stpcpy (buf + 8, "F") != buf + 9 || memcmp (buf, "aabcEDCBF", 10))
-    FAIL ();
-
-  strncpy (buf + 6, "X", 4);
-  if (memcmp (buf, "aabcEDX\0\0", 10))
-    FAIL ();
-
-  if (sprintf (buf + 7, "%s", "67") != 2 || memcmp (buf, "aabcEDX67", 10))
-    FAIL ();
-
-  if (snprintf (buf + 7, 3, "%s", "987654") != 6
-      || memcmp (buf, "aabcEDX98", 10))
-    FAIL ();
-
-  /* These ops need runtime checking, but shouldn't __chk_fail.  */
-  memcpy (buf, "abcdefghij", l0 + 10);
-  memmove (buf + 1, buf, l0 + 9);
-  if (memcmp (buf, "aabcdefghi", 10))
-    FAIL ();
-
-  memcpy (buf, "abcdefghij", l0 + 10);
-  bcopy (buf, buf + 1, l0 + 9);
-  if (memcmp (buf, "aabcdefghi", 10))
-    FAIL ();
-
-  if (mempcpy (buf + 5, "abcde", l0 + 5) != buf + 10
-      || memcmp (buf, "aabcdabcde", 10))
-    FAIL ();
-
-  memset (buf + 8, 'j', l0 + 2);
-  if (memcmp (buf, "aabcdabcjj", 10))
-    FAIL ();
-
-  bzero (buf + 8, l0 + 2);
-  if (memcmp (buf, "aabcdabc\0\0", 10))
-    FAIL ();
-
-  explicit_bzero (buf + 6, l0 + 4);
-  if (memcmp (buf, "aabcda\0\0\0\0", 10))
-    FAIL ();
-
-  strcpy (buf + 4, str1 + 5);
-  if (memcmp (buf, "aabcEDCBA", 10))
-    FAIL ();
-
-  if (stpcpy (buf + 8, str2) != buf + 9 || memcmp (buf, "aabcEDCBF", 10))
-    FAIL ();
-
-  strncpy (buf + 6, "X", l0 + 4);
-  if (memcmp (buf, "aabcEDX\0\0", 10))
-    FAIL ();
-
-  if (stpncpy (buf + 5, "cd", l0 + 5) != buf + 7
-      || memcmp (buf, "aabcEcd\0\0", 10))
-    FAIL ();
-
-  if (sprintf (buf + 7, "%d", num1) != 2 || memcmp (buf, "aabcEcd67", 10))
-    FAIL ();
-
-  if (snprintf (buf + 7, 3, "%d", num2) != 6 || memcmp (buf, "aabcEcd98", 10))
-    FAIL ();
-
-  buf[l0 + 8] = '\0';
-  strcat (buf, "A");
-  if (memcmp (buf, "aabcEcd9A", 10))
-    FAIL ();
-
-  buf[l0 + 7] = '\0';
-  strncat (buf, "ZYXWV", l0 + 2);
-  if (memcmp (buf, "aabcEcdZY", 10))
-    FAIL ();
-
-  /* The following tests are supposed to succeed at all fortify
-     levels, even though they overflow a.buf1 into a.buf2.  */
-  memcpy (a.buf1, "abcdefghij", l0 + 10);
-  memmove (a.buf1 + 1, a.buf1, l0 + 9);
-  if (memcmp (a.buf1, "aabcdefghi", 10))
-    FAIL ();
-
-  memcpy (a.buf1, "abcdefghij", l0 + 10);
-  bcopy (a.buf1, a.buf1 + 1, l0 + 9);
-  if (memcmp (a.buf1, "aabcdefghi", 10))
-    FAIL ();
-
-  if (mempcpy (a.buf1 + 5, "abcde", l0 + 5) != a.buf1 + 10
-      || memcmp (a.buf1, "aabcdabcde", 10))
-    FAIL ();
-
-  memset (a.buf1 + 8, 'j', l0 + 2);
-  if (memcmp (a.buf1, "aabcdabcjj", 10))
-    FAIL ();
-
-  bzero (a.buf1 + 8, l0 + 2);
-  if (memcmp (a.buf1, "aabcdabc\0\0", 10))
-    FAIL ();
-
-  explicit_bzero (a.buf1 + 6, l0 + 4);
-  if (memcmp (a.buf1, "aabcda\0\0\0\0", 10))
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL < 2
-  /* The following tests are supposed to crash with -D_FORTIFY_SOURCE=2
-     and sufficient GCC support, as the string operations overflow
-     from a.buf1 into a.buf2.  */
-  strcpy (a.buf1 + 4, str1 + 5);
-  if (memcmp (a.buf1, "aabcEDCBA", 10))
-    FAIL ();
-
-  if (stpcpy (a.buf1 + 8, str2) != a.buf1 + 9
-      || memcmp (a.buf1, "aabcEDCBF", 10))
-    FAIL ();
-
-  strncpy (a.buf1 + 6, "X", l0 + 4);
-  if (memcmp (a.buf1, "aabcEDX\0\0", 10))
-    FAIL ();
-
-  if (sprintf (a.buf1 + 7, "%d", num1) != 2
-      || memcmp (a.buf1, "aabcEDX67", 10))
-    FAIL ();
-
-  if (snprintf (a.buf1 + 7, 3, "%d", num2) != 6
-      || memcmp (a.buf1, "aabcEDX98", 10))
-    FAIL ();
-
-  a.buf1[l0 + 8] = '\0';
-  strcat (a.buf1, "A");
-  if (memcmp (a.buf1, "aabcEDX9A", 10))
-    FAIL ();
-
-  a.buf1[l0 + 7] = '\0';
-  strncat (a.buf1, "ZYXWV", l0 + 2);
-  if (memcmp (a.buf1, "aabcEDXZY", 10))
-    FAIL ();
-
-#endif
-
-#if __USE_FORTIFY_LEVEL >= 1
-  /* Now check if all buffer overflows are caught at runtime.
-     N.B. All tests involving a length parameter need to be done
-     twice: once with the length a compile-time constant, once without.  */
-
-  CHK_FAIL_START
-  memcpy (buf + 1, "abcdefghij", 10);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  memcpy (buf + 1, "abcdefghij", l0 + 10);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  memmove (buf + 2, buf + 1, 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  memmove (buf + 2, buf + 1, l0 + 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  bcopy (buf + 1, buf + 2, 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  bcopy (buf + 1, buf + 2, l0 + 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  p = (char *) mempcpy (buf + 6, "abcde", 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  p = (char *) mempcpy (buf + 6, "abcde", l0 + 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  memset (buf + 9, 'j', 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  memset (buf + 9, 'j', l0 + 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  bzero (buf + 9, 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  bzero (buf + 9, l0 + 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  explicit_bzero (buf + 9, 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  explicit_bzero (buf + 9, l0 + 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  strcpy (buf + 5, str1 + 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  p = stpcpy (buf + 9, str2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  strncpy (buf + 7, "X", 4);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  strncpy (buf + 7, "X", l0 + 4);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  stpncpy (buf + 6, "cd", 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  stpncpy (buf + 6, "cd", l0 + 5);
-  CHK_FAIL_END
-
-# if !defined __cplusplus || defined __va_arg_pack
-  CHK_FAIL_START
-  sprintf (buf + 8, "%d", num1);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  snprintf (buf + 8, 3, "%d", num2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  snprintf (buf + 8, l0 + 3, "%d", num2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  swprintf (wbuf + 8, 3, L"%d", num1);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  swprintf (wbuf + 8, l0 + 3, L"%d", num1);
-  CHK_FAIL_END
-# endif
-
-  memcpy (buf, str1 + 2, 9);
-  CHK_FAIL_START
-  strcat (buf, "AB");
-  CHK_FAIL_END
-
-  memcpy (buf, str1 + 3, 8);
-  CHK_FAIL_START
-  strncat (buf, "ZYXWV", 3);
-  CHK_FAIL_END
-
-  memcpy (buf, str1 + 3, 8);
-  CHK_FAIL_START
-  strncat (buf, "ZYXWV", l0 + 3);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  memcpy (a.buf1 + 1, "abcdefghij", 10);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  memcpy (a.buf1 + 1, "abcdefghij", l0 + 10);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  memmove (a.buf1 + 2, a.buf1 + 1, 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  memmove (a.buf1 + 2, a.buf1 + 1, l0 + 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  bcopy (a.buf1 + 1, a.buf1 + 2, 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  bcopy (a.buf1 + 1, a.buf1 + 2, l0 + 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  p = (char *) mempcpy (a.buf1 + 6, "abcde", 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  p = (char *) mempcpy (a.buf1 + 6, "abcde", l0 + 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  memset (a.buf1 + 9, 'j', 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  memset (a.buf1 + 9, 'j', l0 + 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  bzero (a.buf1 + 9, 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  bzero (a.buf1 + 9, l0 + 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  explicit_bzero (a.buf1 + 9, 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  explicit_bzero (a.buf1 + 9, l0 + 2);
-  CHK_FAIL_END
-
-# if __USE_FORTIFY_LEVEL >= 2
-#  define O 0
-# else
-#  define O 1
-# endif
-
-  CHK_FAIL_START
-  strcpy (a.buf1 + (O + 4), str1 + 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  p = stpcpy (a.buf1 + (O + 8), str2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  strncpy (a.buf1 + (O + 6), "X", 4);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  strncpy (a.buf1 + (O + 6), "X", l0 + 4);
-  CHK_FAIL_END
-
-# if !defined __cplusplus || defined __va_arg_pack
-  CHK_FAIL_START
-  sprintf (a.buf1 + (O + 7), "%d", num1);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  snprintf (a.buf1 + (O + 7), 3, "%d", num2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  snprintf (a.buf1 + (O + 7), l0 + 3, "%d", num2);
-  CHK_FAIL_END
-# endif
-
-  memcpy (a.buf1, str1 + (3 - O), 8 + O);
-  CHK_FAIL_START
-  strcat (a.buf1, "AB");
-  CHK_FAIL_END
-
-  memcpy (a.buf1, str1 + (4 - O), 7 + O);
-  CHK_FAIL_START
-  strncat (a.buf1, "ZYXWV", l0 + 3);
-  CHK_FAIL_END
-#endif
-
-
-  /* These ops can be done without runtime checking of object size.  */
-  wmemcpy (wbuf, L"abcdefghij", 10);
-  wmemmove (wbuf + 1, wbuf, 9);
-  if (wmemcmp (wbuf, L"aabcdefghi", 10))
-    FAIL ();
-
-  if (wmempcpy (wbuf + 5, L"abcde", 5) != wbuf + 10
-      || wmemcmp (wbuf, L"aabcdabcde", 10))
-    FAIL ();
-
-  wmemset (wbuf + 8, L'j', 2);
-  if (wmemcmp (wbuf, L"aabcdabcjj", 10))
-    FAIL ();
-
-  wcscpy (wbuf + 4, L"EDCBA");
-  if (wmemcmp (wbuf, L"aabcEDCBA", 10))
-    FAIL ();
-
-  if (wcpcpy (wbuf + 8, L"F") != wbuf + 9 || wmemcmp (wbuf, L"aabcEDCBF", 10))
-    FAIL ();
-
-  wcsncpy (wbuf + 6, L"X", 4);
-  if (wmemcmp (wbuf, L"aabcEDX\0\0", 10))
-    FAIL ();
-
-  if (swprintf (wbuf + 7, 3, L"%ls", L"987654") >= 0
-      || wmemcmp (wbuf, L"aabcEDX98", 10))
-    FAIL ();
-
-  if (swprintf (wbuf + 7, 3, L"64") != 2
-      || wmemcmp (wbuf, L"aabcEDX64", 10))
-    FAIL ();
-
-  /* These ops need runtime checking, but shouldn't __chk_fail.  */
-  wmemcpy (wbuf, L"abcdefghij", l0 + 10);
-  wmemmove (wbuf + 1, wbuf, l0 + 9);
-  if (wmemcmp (wbuf, L"aabcdefghi", 10))
-    FAIL ();
-
-  if (wmempcpy (wbuf + 5, L"abcde", l0 + 5) != wbuf + 10
-      || wmemcmp (wbuf, L"aabcdabcde", 10))
-    FAIL ();
-
-  wmemset (wbuf + 8, L'j', l0 + 2);
-  if (wmemcmp (wbuf, L"aabcdabcjj", 10))
-    FAIL ();
-
-  wcscpy (wbuf + 4, wstr1 + 5);
-  if (wmemcmp (wbuf, L"aabcEDCBA", 10))
-    FAIL ();
-
-  if (wcpcpy (wbuf + 8, wstr2) != wbuf + 9 || wmemcmp (wbuf, L"aabcEDCBF", 10))
-    FAIL ();
-
-  wcsncpy (wbuf + 6, L"X", l0 + 4);
-  if (wmemcmp (wbuf, L"aabcEDX\0\0", 10))
-    FAIL ();
-
-  if (wcpncpy (wbuf + 5, L"cd", l0 + 5) != wbuf + 7
-      || wmemcmp (wbuf, L"aabcEcd\0\0", 10))
-    FAIL ();
-
-  if (swprintf (wbuf + 7, 3, L"%d", num2) >= 0
-      || wmemcmp (wbuf, L"aabcEcd98", 10))
-    FAIL ();
-
-  wbuf[l0 + 8] = L'\0';
-  wcscat (wbuf, L"A");
-  if (wmemcmp (wbuf, L"aabcEcd9A", 10))
-    FAIL ();
-
-  wbuf[l0 + 7] = L'\0';
-  wcsncat (wbuf, L"ZYXWV", l0 + 2);
-  if (wmemcmp (wbuf, L"aabcEcdZY", 10))
-    FAIL ();
-
-  wmemcpy (wa.buf1, L"abcdefghij", l0 + 10);
-  wmemmove (wa.buf1 + 1, wa.buf1, l0 + 9);
-  if (wmemcmp (wa.buf1, L"aabcdefghi", 10))
-    FAIL ();
-
-  if (wmempcpy (wa.buf1 + 5, L"abcde", l0 + 5) != wa.buf1 + 10
-      || wmemcmp (wa.buf1, L"aabcdabcde", 10))
-    FAIL ();
-
-  wmemset (wa.buf1 + 8, L'j', l0 + 2);
-  if (wmemcmp (wa.buf1, L"aabcdabcjj", 10))
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL < 2
-  /* The following tests are supposed to crash with -D_FORTIFY_SOURCE=2
-     and sufficient GCC support, as the string operations overflow
-     from a.buf1 into a.buf2.  */
-  wcscpy (wa.buf1 + 4, wstr1 + 5);
-  if (wmemcmp (wa.buf1, L"aabcEDCBA", 10))
-    FAIL ();
-
-  if (wcpcpy (wa.buf1 + 8, wstr2) != wa.buf1 + 9
-      || wmemcmp (wa.buf1, L"aabcEDCBF", 10))
-    FAIL ();
-
-  wcsncpy (wa.buf1 + 6, L"X", l0 + 4);
-  if (wmemcmp (wa.buf1, L"aabcEDX\0\0", 10))
-    FAIL ();
-
-  if (swprintf (wa.buf1 + 7, 3, L"%d", num2) >= 0
-      || wmemcmp (wa.buf1, L"aabcEDX98", 10))
-    FAIL ();
-
-  wa.buf1[l0 + 8] = L'\0';
-  wcscat (wa.buf1, L"A");
-  if (wmemcmp (wa.buf1, L"aabcEDX9A", 10))
-    FAIL ();
-
-  wa.buf1[l0 + 7] = L'\0';
-  wcsncat (wa.buf1, L"ZYXWV", l0 + 2);
-  if (wmemcmp (wa.buf1, L"aabcEDXZY", 10))
-    FAIL ();
-
-#endif
-
-#if __USE_FORTIFY_LEVEL >= 1
-  /* Now check if all buffer overflows are caught at runtime.
-     N.B. All tests involving a length parameter need to be done
-     twice: once with the length a compile-time constant, once without.  */
-
-  CHK_FAIL_START
-  wmemcpy (wbuf + 1, L"abcdefghij", 10);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemcpy (wbuf + 1, L"abcdefghij", l0 + 10);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemcpy (wbuf + 9, L"abcdefghij", 10);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemcpy (wbuf + 9, L"abcdefghij", l0 + 10);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemmove (wbuf + 2, wbuf + 1, 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemmove (wbuf + 2, wbuf + 1, l0 + 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wp = wmempcpy (wbuf + 6, L"abcde", 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wp = wmempcpy (wbuf + 6, L"abcde", l0 + 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemset (wbuf + 9, L'j', 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemset (wbuf + 9, L'j', l0 + 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wcscpy (wbuf + 5, wstr1 + 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wp = wcpcpy (wbuf + 9, wstr2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wcsncpy (wbuf + 7, L"X", 4);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wcsncpy (wbuf + 7, L"X", l0 + 4);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wcsncpy (wbuf + 9, L"XABCDEFGH", 8);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wcpncpy (wbuf + 9, L"XABCDEFGH", 8);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wcpncpy (wbuf + 6, L"cd", 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wcpncpy (wbuf + 6, L"cd", l0 + 5);
-  CHK_FAIL_END
-
-  wmemcpy (wbuf, wstr1 + 2, 9);
-  CHK_FAIL_START
-  wcscat (wbuf, L"AB");
-  CHK_FAIL_END
-
-  wmemcpy (wbuf, wstr1 + 3, 8);
-  CHK_FAIL_START
-  wcsncat (wbuf, L"ZYXWV", l0 + 3);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemcpy (wa.buf1 + 1, L"abcdefghij", 10);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemcpy (wa.buf1 + 1, L"abcdefghij", l0 + 10);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemmove (wa.buf1 + 2, wa.buf1 + 1, 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemmove (wa.buf1 + 2, wa.buf1 + 1, l0 + 9);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wp = wmempcpy (wa.buf1 + 6, L"abcde", 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wp = wmempcpy (wa.buf1 + 6, L"abcde", l0 + 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemset (wa.buf1 + 9, L'j', 2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wmemset (wa.buf1 + 9, L'j', l0 + 2);
-  CHK_FAIL_END
-
-#if __USE_FORTIFY_LEVEL >= 2
-# define O 0
-#else
-# define O 1
-#endif
-
-  CHK_FAIL_START
-  wcscpy (wa.buf1 + (O + 4), wstr1 + 5);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wp = wcpcpy (wa.buf1 + (O + 8), wstr2);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wcsncpy (wa.buf1 + (O + 6), L"X", 4);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  wcsncpy (wa.buf1 + (O + 6), L"X", l0 + 4);
-  CHK_FAIL_END
-
-  wmemcpy (wa.buf1, wstr1 + (3 - O), 8 + O);
-  CHK_FAIL_START
-  wcscat (wa.buf1, L"AB");
-  CHK_FAIL_END
-
-  wmemcpy (wa.buf1, wstr1 + (4 - O), 7 + O);
-  CHK_FAIL_START
-  wcsncat (wa.buf1, L"ZYXWV", l0 + 3);
-  CHK_FAIL_END
-#endif
-
-
-  /* Now checks for %n protection.  */
-
-  /* Constant literals passed directly are always ok
-     (even with warnings about possible bugs from GCC).  */
-  int n1, n2;
-  if (sprintf (buf, "%s%n%s%n", str2, &n1, str2, &n2) != 2
-      || n1 != 1 || n2 != 2)
-    FAIL ();
-
-  /* In this case the format string is not known at compile time,
-     but resides in read-only memory, so is ok.  */
-  if (snprintf (buf, 4, str3, str2, &n1, str2, &n2) != 2
-      || n1 != 1 || n2 != 2)
-    FAIL ();
-
-  strcpy (buf2 + 2, "%n%s%n");
-  /* When the format string is writable and contains %n,
-     with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
-  CHK_FAIL2_START
-  if (sprintf (buf, buf2, str2, &n1, str2, &n1) != 2)
-    FAIL ();
-  CHK_FAIL2_END
-
-  CHK_FAIL2_START
-  if (snprintf (buf, 3, buf2, str2, &n1, str2, &n1) != 2)
-    FAIL ();
-  CHK_FAIL2_END
-
-  /* But if there is no %n, even writable format string
-     should work.  */
-  buf2[6] = '\0';
-  if (sprintf (buf, buf2 + 4, str2) != 1)
-    FAIL ();
-
-  /* Constant literals passed directly are always ok
-     (even with warnings about possible bugs from GCC).  */
-  if (printf ("%s%n%s%n", str4, &n1, str5, &n2) != 14
-      || n1 != 7 || n2 != 14)
-    FAIL ();
-
-  /* In this case the format string is not known at compile time,
-     but resides in read-only memory, so is ok.  */
-  if (printf (str3, str4, &n1, str5, &n2) != 14
-      || n1 != 7 || n2 != 14)
-    FAIL ();
-
-  strcpy (buf2 + 2, "%n%s%n");
-  /* When the format string is writable and contains %n,
-     with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
-  CHK_FAIL2_START
-  if (printf (buf2, str4, &n1, str5, &n1) != 14)
-    FAIL ();
-  CHK_FAIL2_END
-
-  /* But if there is no %n, even writable format string
-     should work.  */
-  buf2[6] = '\0';
-  if (printf (buf2 + 4, str5) != 7)
-    FAIL ();
-
-  FILE *fp = stdout;
-
-  /* Constant literals passed directly are always ok
-     (even with warnings about possible bugs from GCC).  */
-  if (fprintf (fp, "%s%n%s%n", str4, &n1, str5, &n2) != 14
-      || n1 != 7 || n2 != 14)
-    FAIL ();
-
-  /* In this case the format string is not known at compile time,
-     but resides in read-only memory, so is ok.  */
-  if (fprintf (fp, str3, str4, &n1, str5, &n2) != 14
-      || n1 != 7 || n2 != 14)
-    FAIL ();
-
-  strcpy (buf2 + 2, "%n%s%n");
-  /* When the format string is writable and contains %n,
-     with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
-  CHK_FAIL2_START
-  if (fprintf (fp, buf2, str4, &n1, str5, &n1) != 14)
-    FAIL ();
-  CHK_FAIL2_END
-
-  /* But if there is no %n, even writable format string
-     should work.  */
-  buf2[6] = '\0';
-  if (fprintf (fp, buf2 + 4, str5) != 7)
-    FAIL ();
-
-  char *my_ptr = NULL;
-  strcpy (buf2 + 2, "%n%s%n");
-  /* When the format string is writable and contains %n,
-     with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
-  CHK_FAIL2_START
-  if (asprintf (&my_ptr, buf2, str4, &n1, str5, &n1) != 14)
-    FAIL ();
-  else
-    free (my_ptr);
-  CHK_FAIL2_END
-
-  struct obstack obs;
-  obstack_init (&obs);
-  CHK_FAIL2_START
-  if (obstack_printf (&obs, buf2, str4, &n1, str5, &n1) != 14)
-    FAIL ();
-  CHK_FAIL2_END
-  obstack_free (&obs, NULL);
-
-  my_ptr = NULL;
-  if (asprintf (&my_ptr, "%s%n%s%n", str4, &n1, str5, &n1) != 14)
-    FAIL ();
-  else
-    free (my_ptr);
-
-  obstack_init (&obs);
-  if (obstack_printf (&obs, "%s%n%s%n", str4, &n1, str5, &n1) != 14)
-    FAIL ();
-  obstack_free (&obs, NULL);
-
-  if (freopen (temp_filename, "r", stdin) == NULL)
-    {
-      puts ("could not open temporary file");
-      exit (1);
-    }
-
-  if (gets (buf) != buf || memcmp (buf, "abcdefgh", 9))
-    FAIL ();
-  if (gets (buf) != buf || memcmp (buf, "ABCDEFGHI", 10))
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  if (gets (buf) != buf)
-    FAIL ();
-  CHK_FAIL_END
-#endif
-
-  rewind (stdin);
-
-  if (fgets (buf, buf_size, stdin) != buf
-      || memcmp (buf, "abcdefgh\n", 10))
-    FAIL ();
-  if (fgets (buf, buf_size, stdin) != buf || memcmp (buf, "ABCDEFGHI", 10))
-    FAIL ();
-
-  rewind (stdin);
-
-  if (fgets (buf, l0 + buf_size, stdin) != buf
-      || memcmp (buf, "abcdefgh\n", 10))
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  if (fgets (buf, buf_size + 1, stdin) != buf)
-    FAIL ();
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  if (fgets (buf, l0 + buf_size + 1, stdin) != buf)
-    FAIL ();
-  CHK_FAIL_END
-#endif
-
-  rewind (stdin);
-
-  if (fgets_unlocked (buf, buf_size, stdin) != buf
-      || memcmp (buf, "abcdefgh\n", 10))
-    FAIL ();
-  if (fgets_unlocked (buf, buf_size, stdin) != buf
-      || memcmp (buf, "ABCDEFGHI", 10))
-    FAIL ();
-
-  rewind (stdin);
-
-  if (fgets_unlocked (buf, l0 + buf_size, stdin) != buf
-      || memcmp (buf, "abcdefgh\n", 10))
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  if (fgets_unlocked (buf, buf_size + 1, stdin) != buf)
-    FAIL ();
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  if (fgets_unlocked (buf, l0 + buf_size + 1, stdin) != buf)
-    FAIL ();
-  CHK_FAIL_END
-#endif
-
-  rewind (stdin);
-
-  if (fread (buf, 1, buf_size, stdin) != buf_size
-      || memcmp (buf, "abcdefgh\nA", 10))
-    FAIL ();
-  if (fread (buf, buf_size, 1, stdin) != 1
-      || memcmp (buf, "BCDEFGHI\na", 10))
-    FAIL ();
-
-  rewind (stdin);
-
-  if (fread (buf, l0 + 1, buf_size, stdin) != buf_size
-      || memcmp (buf, "abcdefgh\nA", 10))
-    FAIL ();
-  if (fread (buf, buf_size, l0 + 1, stdin) != 1
-      || memcmp (buf, "BCDEFGHI\na", 10))
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  if (fread (buf, 1, buf_size + 1, stdin) != buf_size + 1)
-    FAIL ();
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  if (fread (buf, buf_size + 1, l0 + 1, stdin) != 1)
-    FAIL ();
-  CHK_FAIL_END
-#endif
-
-  rewind (stdin);
-
-  if (fread_unlocked (buf, 1, buf_size, stdin) != buf_size
-      || memcmp (buf, "abcdefgh\nA", 10))
-    FAIL ();
-  if (fread_unlocked (buf, buf_size, 1, stdin) != 1
-      || memcmp (buf, "BCDEFGHI\na", 10))
-    FAIL ();
-
-  rewind (stdin);
-
-  if (fread_unlocked (buf, 1, 4, stdin) != 4
-      || memcmp (buf, "abcdFGHI\na", 10))
-    FAIL ();
-  if (fread_unlocked (buf, 4, 1, stdin) != 1
-      || memcmp (buf, "efghFGHI\na", 10))
-    FAIL ();
-
-  rewind (stdin);
-
-  if (fread_unlocked (buf, l0 + 1, buf_size, stdin) != buf_size
-      || memcmp (buf, "abcdefgh\nA", 10))
-    FAIL ();
-  if (fread_unlocked (buf, buf_size, l0 + 1, stdin) != 1
-      || memcmp (buf, "BCDEFGHI\na", 10))
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  if (fread_unlocked (buf, 1, buf_size + 1, stdin) != buf_size + 1)
-    FAIL ();
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  if (fread_unlocked (buf, buf_size + 1, l0 + 1, stdin) != 1)
-    FAIL ();
-  CHK_FAIL_END
-#endif
-
-  lseek (fileno (stdin), 0, SEEK_SET);
-
-  if (read (fileno (stdin), buf, buf_size - 1) != buf_size - 1
-      || memcmp (buf, "abcdefgh\n", 9))
-    FAIL ();
-  if (read (fileno (stdin), buf, buf_size - 1) != buf_size - 1
-      || memcmp (buf, "ABCDEFGHI", 9))
-    FAIL ();
-
-  lseek (fileno (stdin), 0, SEEK_SET);
-
-  if (read (fileno (stdin), buf, l0 + buf_size - 1) != buf_size - 1
-      || memcmp (buf, "abcdefgh\n", 9))
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  if (read (fileno (stdin), buf, buf_size + 1) != buf_size + 1)
-    FAIL ();
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  if (read (fileno (stdin), buf, l0 + buf_size + 1) != buf_size + 1)
-    FAIL ();
-  CHK_FAIL_END
-#endif
-
-  if (pread (fileno (stdin), buf, buf_size - 1, buf_size - 2)
-      != buf_size - 1
-      || memcmp (buf, "\nABCDEFGH", 9))
-    FAIL ();
-  if (pread (fileno (stdin), buf, buf_size - 1, 0) != buf_size - 1
-      || memcmp (buf, "abcdefgh\n", 9))
-    FAIL ();
-  if (pread (fileno (stdin), buf, l0 + buf_size - 1, buf_size - 3)
-      != buf_size - 1
-      || memcmp (buf, "h\nABCDEFG", 9))
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  if (pread (fileno (stdin), buf, buf_size + 1, 2 * buf_size)
-      != buf_size + 1)
-    FAIL ();
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  if (pread (fileno (stdin), buf, l0 + buf_size + 1, 2 * buf_size)
-      != buf_size + 1)
-    FAIL ();
-  CHK_FAIL_END
-#endif
-
-  if (pread64 (fileno (stdin), buf, buf_size - 1, buf_size - 2)
-      != buf_size - 1
-      || memcmp (buf, "\nABCDEFGH", 9))
-    FAIL ();
-  if (pread64 (fileno (stdin), buf, buf_size - 1, 0) != buf_size - 1
-      || memcmp (buf, "abcdefgh\n", 9))
-    FAIL ();
-  if (pread64 (fileno (stdin), buf, l0 + buf_size - 1, buf_size - 3)
-      != buf_size - 1
-      || memcmp (buf, "h\nABCDEFG", 9))
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  if (pread64 (fileno (stdin), buf, buf_size + 1, 2 * buf_size)
-      != buf_size + 1)
-    FAIL ();
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  if (pread64 (fileno (stdin), buf, l0 + buf_size + 1, 2 * buf_size)
-      != buf_size + 1)
-    FAIL ();
-  CHK_FAIL_END
-#endif
-
-  if (freopen (temp_filename, "r", stdin) == NULL)
-    {
-      puts ("could not open temporary file");
-      exit (1);
-    }
-
-  if (fseek (stdin, 9 + 10 + 11, SEEK_SET))
-    {
-      puts ("could not seek in test file");
-      exit (1);
-    }
-
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  if (gets (buf) != buf)
-    FAIL ();
-  CHK_FAIL_END
-#endif
-
-  /* Check whether missing N$ formats are detected.  */
-  CHK_FAIL2_START
-  printf ("%3$d\n", 1, 2, 3, 4);
-  CHK_FAIL2_END
-
-  CHK_FAIL2_START
-  fprintf (stdout, "%3$d\n", 1, 2, 3, 4);
-  CHK_FAIL2_END
-
-  CHK_FAIL2_START
-  sprintf (buf, "%3$d\n", 1, 2, 3, 4);
-  CHK_FAIL2_END
-
-  CHK_FAIL2_START
-  snprintf (buf, buf_size, "%3$d\n", 1, 2, 3, 4);
-  CHK_FAIL2_END
-
-  int sp[2];
-  if (socketpair (PF_UNIX, SOCK_STREAM, 0, sp))
-    FAIL ();
-  else
-    {
-      const char *sendstr = "abcdefgh\nABCDEFGH\n0123456789\n";
-      if ((size_t) send (sp[0], sendstr, strlen (sendstr), 0)
-	  != strlen (sendstr))
-	FAIL ();
-
-      char recvbuf[12];
-      if (recv (sp[1], recvbuf, sizeof recvbuf, MSG_PEEK)
-	  != sizeof recvbuf
-	  || memcmp (recvbuf, sendstr, sizeof recvbuf) != 0)
-	FAIL ();
-
-      if (recv (sp[1], recvbuf + 6, l0 + sizeof recvbuf - 7, MSG_PEEK)
-	  != sizeof recvbuf - 7
-	  || memcmp (recvbuf + 6, sendstr, sizeof recvbuf - 7) != 0)
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      CHK_FAIL_START
-      if (recv (sp[1], recvbuf + 1, sizeof recvbuf, MSG_PEEK)
-	  != sizeof recvbuf)
-	FAIL ();
-      CHK_FAIL_END
-
-      CHK_FAIL_START
-      if (recv (sp[1], recvbuf + 4, l0 + sizeof recvbuf - 3, MSG_PEEK)
-	  != sizeof recvbuf - 3)
-	FAIL ();
-      CHK_FAIL_END
-#endif
-
-      socklen_t sl;
-      struct sockaddr_un sa_un;
-
-      sl = sizeof (sa_un);
-      if (recvfrom (sp[1], recvbuf, sizeof recvbuf, MSG_PEEK,
-		    (struct sockaddr *) &sa_un, &sl)
-	  != sizeof recvbuf
-	  || memcmp (recvbuf, sendstr, sizeof recvbuf) != 0)
-	FAIL ();
-
-      sl = sizeof (sa_un);
-      if (recvfrom (sp[1], recvbuf + 6, l0 + sizeof recvbuf - 7, MSG_PEEK,
-		    (struct sockaddr *) &sa_un, &sl) != sizeof recvbuf - 7
-	  || memcmp (recvbuf + 6, sendstr, sizeof recvbuf - 7) != 0)
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      CHK_FAIL_START
-      sl = sizeof (sa_un);
-      if (recvfrom (sp[1], recvbuf + 1, sizeof recvbuf, MSG_PEEK,
-		    (struct sockaddr *) &sa_un, &sl) != sizeof recvbuf)
-	FAIL ();
-      CHK_FAIL_END
-
-      CHK_FAIL_START
-      sl = sizeof (sa_un);
-      if (recvfrom (sp[1], recvbuf + 4, l0 + sizeof recvbuf - 3, MSG_PEEK,
-		    (struct sockaddr *) &sa_un, &sl) != sizeof recvbuf - 3)
-	FAIL ();
-      CHK_FAIL_END
-#endif
-
-      close (sp[0]);
-      close (sp[1]);
-    }
-
-  char fname[] = "/tmp/tst-chk1-dir-XXXXXX\0foo";
-  char *enddir = strchr (fname, '\0');
-  if (mkdtemp (fname) == NULL)
-    {
-      printf ("mkdtemp failed: %m\n");
-      return 1;
-    }
-  *enddir = '/';
-  if (symlink ("bar", fname) != 0)
-    FAIL ();
-
-  char readlinkbuf[4];
-  if (readlink (fname, readlinkbuf, 4) != 3
-      || memcmp (readlinkbuf, "bar", 3) != 0)
-    FAIL ();
-  if (readlink (fname, readlinkbuf + 1, l0 + 3) != 3
-      || memcmp (readlinkbuf, "bbar", 4) != 0)
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  if (readlink (fname, readlinkbuf + 2, l0 + 3) != 3)
-    FAIL ();
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  if (readlink (fname, readlinkbuf + 3, 4) != 3)
-    FAIL ();
-  CHK_FAIL_END
-#endif
-
-  int tmpfd = open ("/tmp", O_RDONLY | O_DIRECTORY);
-  if (tmpfd < 0)
-    FAIL ();
-
-  if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf, 4) != 3
-      || memcmp (readlinkbuf, "bar", 3) != 0)
-    FAIL ();
-  if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 1,
-		  l0 + 3) != 3
-      || memcmp (readlinkbuf, "bbar", 4) != 0)
-    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 2,
-		  l0 + 3) != 3)
-    FAIL ();
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 3,
-		  4) != 3)
-    FAIL ();
-  CHK_FAIL_END
-#endif
-
-  close (tmpfd);
-
-  char *cwd1 = getcwd (NULL, 0);
-  if (cwd1 == NULL)
-    FAIL ();
-
-  char *cwd2 = getcwd (NULL, 250);
-  if (cwd2 == NULL)
-    FAIL ();
-
-  if (cwd1 && cwd2)
-    {
-      if (strcmp (cwd1, cwd2) != 0)
-	FAIL ();
-
-      *enddir = '\0';
-      if (chdir (fname))
-	FAIL ();
-
-      char *cwd3 = getcwd (NULL, 0);
-      if (cwd3 == NULL)
-	FAIL ();
-      if (strcmp (fname, cwd3) != 0)
-	printf ("getcwd after chdir is '%s' != '%s',"
-		"get{c,}wd tests skipped\n", cwd3, fname);
-      else
-	{
-	  char getcwdbuf[sizeof fname - 3];
-
-	  char *cwd4 = getcwd (getcwdbuf, sizeof getcwdbuf);
-	  if (cwd4 != getcwdbuf
-	      || strcmp (getcwdbuf, fname) != 0)
-	    FAIL ();
-
-	  cwd4 = getcwd (getcwdbuf + 1, l0 + sizeof getcwdbuf - 1);
-	  if (cwd4 != getcwdbuf + 1
-	      || getcwdbuf[0] != fname[0]
-	      || strcmp (getcwdbuf + 1, fname) != 0)
-	    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-	  CHK_FAIL_START
-	  if (getcwd (getcwdbuf + 2, l0 + sizeof getcwdbuf)
-	      != getcwdbuf + 2)
-	    FAIL ();
-	  CHK_FAIL_END
-
-	  CHK_FAIL_START
-	  if (getcwd (getcwdbuf + 2, sizeof getcwdbuf)
-	      != getcwdbuf + 2)
-	    FAIL ();
-	  CHK_FAIL_END
-#endif
-
-	  if (getwd (getcwdbuf) != getcwdbuf
-	      || strcmp (getcwdbuf, fname) != 0)
-	    FAIL ();
-
-	  if (getwd (getcwdbuf + 1) != getcwdbuf + 1
-	      || strcmp (getcwdbuf + 1, fname) != 0)
-	    FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-	  CHK_FAIL_START
-	  if (getwd (getcwdbuf + 2) != getcwdbuf + 2)
-	    FAIL ();
-	  CHK_FAIL_END
-#endif
-	}
-
-      if (chdir (cwd1) != 0)
-	FAIL ();
-      free (cwd3);
-    }
-
-  free (cwd1);
-  free (cwd2);
-  *enddir = '/';
-  if (unlink (fname) != 0)
-    FAIL ();
-
-  *enddir = '\0';
-  if (rmdir (fname) != 0)
-    FAIL ();
-
-
-#if PATH_MAX > 0
-  char largebuf[PATH_MAX];
-  char *realres = realpath (".", largebuf);
-  if (realres != largebuf)
-    FAIL ();
-
-# if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  char realbuf[1];
-  realres = realpath (".", realbuf);
-  if (realres != realbuf)
-    FAIL ();
-  CHK_FAIL_END
-# endif
-#endif
-
-  if (setlocale (LC_ALL, "de_DE.UTF-8") != NULL)
-    {
-      assert (MB_CUR_MAX <= 10);
-
-      /* First a simple test.  */
-      char enough[10];
-      if (wctomb (enough, L'A') != 1)
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      /* We know the wchar_t encoding is ISO 10646.  So pick a
-	 character which has a multibyte representation which does not
-	 fit.  */
-      CHK_FAIL_START
-      char smallbuf[2];
-      if (wctomb (smallbuf, L'\x100') != 2)
-	FAIL ();
-      CHK_FAIL_END
-#endif
-
-      mbstate_t s;
-      memset (&s, '\0', sizeof (s));
-      if (wcrtomb (enough, L'D', &s) != 1 || enough[0] != 'D')
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      /* We know the wchar_t encoding is ISO 10646.  So pick a
-	 character which has a multibyte representation which does not
-	 fit.  */
-      CHK_FAIL_START
-      char smallbuf[2];
-      if (wcrtomb (smallbuf, L'\x100', &s) != 2)
-	FAIL ();
-      CHK_FAIL_END
-#endif
-
-      wchar_t wenough[10];
-      memset (&s, '\0', sizeof (s));
-      const char *cp = "A";
-      if (mbsrtowcs (wenough, &cp, 10, &s) != 1
-	  || wcscmp (wenough, L"A") != 0)
-	FAIL ();
-
-      cp = "BC";
-      if (mbsrtowcs (wenough, &cp, l0 + 10, &s) != 2
-	  || wcscmp (wenough, L"BC") != 0)
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      CHK_FAIL_START
-      wchar_t wsmallbuf[2];
-      cp = "ABC";
-      mbsrtowcs (wsmallbuf, &cp, 10, &s);
-      CHK_FAIL_END
-#endif
-
-      cp = "A";
-      if (mbstowcs (wenough, cp, 10) != 1
-	  || wcscmp (wenough, L"A") != 0)
-	FAIL ();
-
-      cp = "DEF";
-      if (mbstowcs (wenough, cp, l0 + 10) != 3
-	  || wcscmp (wenough, L"DEF") != 0)
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      CHK_FAIL_START
-      wchar_t wsmallbuf[2];
-      cp = "ABC";
-      mbstowcs (wsmallbuf, cp, 10);
-      CHK_FAIL_END
-#endif
-
-      memset (&s, '\0', sizeof (s));
-      cp = "ABC";
-      wcscpy (wenough, L"DEF");
-      if (mbsnrtowcs (wenough, &cp, 1, 10, &s) != 1
-	  || wcscmp (wenough, L"AEF") != 0)
-	FAIL ();
-
-      cp = "IJ";
-      if (mbsnrtowcs (wenough, &cp, 1, l0 + 10, &s) != 1
-	  || wcscmp (wenough, L"IEF") != 0)
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      CHK_FAIL_START
-      wchar_t wsmallbuf[2];
-      cp = "ABC";
-      mbsnrtowcs (wsmallbuf, &cp, 3, 10, &s);
-      CHK_FAIL_END
-#endif
-
-      memset (&s, '\0', sizeof (s));
-      const wchar_t *wcp = L"A";
-      if (wcsrtombs (enough, &wcp, 10, &s) != 1
-	  || strcmp (enough, "A") != 0)
-	FAIL ();
-
-      wcp = L"BC";
-      if (wcsrtombs (enough, &wcp, l0 + 10, &s) != 2
-	  || strcmp (enough, "BC") != 0)
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      CHK_FAIL_START
-      char smallbuf[2];
-      wcp = L"ABC";
-      wcsrtombs (smallbuf, &wcp, 10, &s);
-      CHK_FAIL_END
-#endif
-
-      memset (enough, 'Z', sizeof (enough));
-      wcp = L"EF";
-      if (wcstombs (enough, wcp, 10) != 2
-	  || strcmp (enough, "EF") != 0)
-	FAIL ();
-
-      wcp = L"G";
-      if (wcstombs (enough, wcp, l0 + 10) != 1
-	  || strcmp (enough, "G") != 0)
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      CHK_FAIL_START
-      char smallbuf[2];
-      wcp = L"ABC";
-      wcstombs (smallbuf, wcp, 10);
-      CHK_FAIL_END
-#endif
-
-      memset (&s, '\0', sizeof (s));
-      wcp = L"AB";
-      if (wcsnrtombs (enough, &wcp, 1, 10, &s) != 1
-	  || strcmp (enough, "A") != 0)
-	FAIL ();
-
-      wcp = L"BCD";
-      if (wcsnrtombs (enough, &wcp, 1, l0 + 10, &s) != 1
-	  || strcmp (enough, "B") != 0)
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      CHK_FAIL_START
-      char smallbuf[2];
-      wcp = L"ABC";
-      wcsnrtombs (smallbuf, &wcp, 3, 10, &s);
-      CHK_FAIL_END
-#endif
-    }
-  else
-    {
-      puts ("cannot set locale");
-      ret = 1;
-    }
-
-  int fd = posix_openpt (O_RDWR);
-  if (fd != -1)
-    {
-      char enough[1000];
-      if (ptsname_r (fd, enough, sizeof (enough)) != 0)
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      CHK_FAIL_START
-      char smallbuf[2];
-      if (ptsname_r (fd, smallbuf, sizeof (smallbuf) + 1) == 0)
-	FAIL ();
-      CHK_FAIL_END
-#endif
-      close (fd);
-    }
-
-#if PATH_MAX > 0
-  confstr (_CS_GNU_LIBC_VERSION, largebuf, sizeof (largebuf));
-# if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  char smallbuf[1];
-  confstr (_CS_GNU_LIBC_VERSION, smallbuf, sizeof (largebuf));
-  CHK_FAIL_END
-# endif
-#endif
-
-  gid_t grpslarge[5];
-  int ngr = getgroups (5, grpslarge);
-  asm volatile ("" : : "r" (ngr));
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  char smallbuf[1];
-  ngr = getgroups (5, (gid_t *) smallbuf);
-  asm volatile ("" : : "r" (ngr));
-  CHK_FAIL_END
-#endif
-
-  fd = open (_PATH_TTY, O_RDONLY);
-  if (fd != -1)
-    {
-      char enough[1000];
-      if (ttyname_r (fd, enough, sizeof (enough)) != 0)
-	FAIL ();
-
-#if __USE_FORTIFY_LEVEL >= 1
-      CHK_FAIL_START
-      char smallbuf[2];
-      if (ttyname_r (fd, smallbuf, sizeof (smallbuf) + 1) == 0)
-	FAIL ();
-      CHK_FAIL_END
-#endif
-      close (fd);
-    }
-
-  char hostnamelarge[1000];
-  gethostname (hostnamelarge, sizeof (hostnamelarge));
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  char smallbuf[1];
-  gethostname (smallbuf, sizeof (hostnamelarge));
-  CHK_FAIL_END
-#endif
-
-  char loginlarge[1000];
-  getlogin_r (loginlarge, sizeof (hostnamelarge));
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  char smallbuf[1];
-  getlogin_r (smallbuf, sizeof (loginlarge));
-  CHK_FAIL_END
-#endif
-
-  char domainnamelarge[1000];
-  int res = getdomainname (domainnamelarge, sizeof (domainnamelarge));
-  asm volatile ("" : : "r" (res));
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  char smallbuf[1];
-  res = getdomainname (smallbuf, sizeof (domainnamelarge));
-  asm volatile ("" : : "r" (res));
-  CHK_FAIL_END
-#endif
-
-  fd_set s;
-  FD_ZERO (&s);
-
-  FD_SET (FD_SETSIZE - 1, &s);
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  FD_SET (FD_SETSIZE, &s);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  FD_SET (l0 + FD_SETSIZE, &s);
-  CHK_FAIL_END
-#endif
-
-  FD_CLR (FD_SETSIZE - 1, &s);
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  FD_CLR (FD_SETSIZE, &s);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  FD_SET (l0 + FD_SETSIZE, &s);
-  CHK_FAIL_END
-#endif
-
-  FD_ISSET (FD_SETSIZE - 1, &s);
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  FD_ISSET (FD_SETSIZE, &s);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  FD_ISSET (l0 + FD_SETSIZE, &s);
-  CHK_FAIL_END
-#endif
-
-  struct pollfd fds[1];
-  fds[0].fd = STDOUT_FILENO;
-  fds[0].events = POLLOUT;
-  poll (fds, 1, 0);
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  poll (fds, 2, 0);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  poll (fds, l0 + 2, 0);
-  CHK_FAIL_END
-#endif
-  ppoll (fds, 1, NULL, NULL);
-#if __USE_FORTIFY_LEVEL >= 1
-  CHK_FAIL_START
-  ppoll (fds, 2, NULL, NULL);
-  CHK_FAIL_END
-
-  CHK_FAIL_START
-  ppoll (fds, l0 + 2, NULL, NULL);
-  CHK_FAIL_END
-#endif
-
-  return ret;
-}
+#define _FORTIFY_SOURCE 1
+#include "tst-chk0.c"
diff --git a/debug/tst-lfschk4.cc b/debug/tst-chk1cc-lfs.cc
similarity index 100%
rename from debug/tst-lfschk4.cc
rename to debug/tst-chk1cc-lfs.cc
diff --git a/debug/tst-chk5.cc b/debug/tst-chk1cc.cc
similarity index 54%
rename from debug/tst-chk5.cc
rename to debug/tst-chk1cc.cc
index be37ce2d22..c09b01df34 100644
--- a/debug/tst-chk5.cc
+++ b/debug/tst-chk1cc.cc
@@ -1,2 +1,2 @@ 
 #define _FORTIFY_SOURCE 1
-#include "tst-chk1.c"
+#include "tst-chk0.c"
diff --git a/debug/tst-lfschk2.c b/debug/tst-chk2-lfs.c
similarity index 100%
rename from debug/tst-lfschk2.c
rename to debug/tst-chk2-lfs.c
diff --git a/debug/tst-chk2.c b/debug/tst-chk2.c
index be37ce2d22..983cb8aaa8 100644
--- a/debug/tst-chk2.c
+++ b/debug/tst-chk2.c
@@ -1,2 +1,2 @@ 
-#define _FORTIFY_SOURCE 1
-#include "tst-chk1.c"
+#define _FORTIFY_SOURCE 2
+#include "tst-chk0.c"
diff --git a/debug/tst-lfschk5.cc b/debug/tst-chk2cc-lfs.cc
similarity index 100%
rename from debug/tst-lfschk5.cc
rename to debug/tst-chk2cc-lfs.cc
diff --git a/debug/tst-chk6.cc b/debug/tst-chk2cc.cc
similarity index 54%
rename from debug/tst-chk6.cc
rename to debug/tst-chk2cc.cc
index 38b8e4fb36..983cb8aaa8 100644
--- a/debug/tst-chk6.cc
+++ b/debug/tst-chk2cc.cc
@@ -1,2 +1,2 @@ 
 #define _FORTIFY_SOURCE 2
-#include "tst-chk1.c"
+#include "tst-chk0.c"
diff --git a/debug/tst-lfschk3.c b/debug/tst-chk3-lfs.c
similarity index 100%
rename from debug/tst-lfschk3.c
rename to debug/tst-chk3-lfs.c
diff --git a/debug/tst-chk3.c b/debug/tst-chk3.c
index 38b8e4fb36..2f87061b00 100644
--- a/debug/tst-chk3.c
+++ b/debug/tst-chk3.c
@@ -1,2 +1,2 @@ 
-#define _FORTIFY_SOURCE 2
-#include "tst-chk1.c"
+#define _FORTIFY_SOURCE 3
+#include "tst-chk0.c"
diff --git a/debug/tst-lfschk6.cc b/debug/tst-chk3cc-lfs.cc
similarity index 100%
rename from debug/tst-lfschk6.cc
rename to debug/tst-chk3cc-lfs.cc
diff --git a/debug/tst-chk8.cc b/debug/tst-chk3cc.cc
similarity index 54%
rename from debug/tst-chk8.cc
rename to debug/tst-chk3cc.cc
index 2a7b323812..2f87061b00 100644
--- a/debug/tst-chk8.cc
+++ b/debug/tst-chk3cc.cc
@@ -1,2 +1,2 @@ 
 #define _FORTIFY_SOURCE 3
-#include "tst-chk1.c"
+#include "tst-chk0.c"
diff --git a/debug/tst-chk4.cc b/debug/tst-chk4.cc
deleted file mode 100644
index c82e6aac86..0000000000
--- a/debug/tst-chk4.cc
+++ /dev/null
@@ -1 +0,0 @@ 
-#include "tst-chk1.c"
diff --git a/debug/tst-chk7.c b/debug/tst-chk7.c
deleted file mode 100644
index 2a7b323812..0000000000
--- a/debug/tst-chk7.c
+++ /dev/null
@@ -1,2 +0,0 @@ 
-#define _FORTIFY_SOURCE 3
-#include "tst-chk1.c"