ldbl-128ibm-compat: Add regular character, fortified printing functions

Since the introduction of internal functions with explicit flags for the
printf family of functions, the 'mode' parameter can be used to select
which format long double parameters have (with the mode flags:
PRINTF_LDBL_IS_DBL and PRINTF_LDBL_USES_FLOAT128), as well as to select
whether to check for overflows (mode flag: PRINTF_FORTIFY).

This patch combines PRINTF_LDBL_USES_FLOAT128 and PRINTF_FORTIFY to
provide the IEEE binary128 version of printf-like function for platforms
where long double can take this format, in addition to the double format
and to some non-ieee format (currently, this means powerpc64le).

There are two flavors of test cases provided with this patch: one that
explicitly calls the fortified functions, for instance __asprintf_chk,
and another that reuses the non-fortified test, but defining
_FORTIFY_SOURCE as 2.  The first guarantees that the implementations are
actually being tested (in bits/stdio2.h, vprintf gets redirected to
__vfprintf_chk, which would leave __vprintf_chk untested), whereas the
second guarantees that the redirections calls the correct function in
the IBM and IEEE long double cases.

Tested for powerpc64le.

Reviewed-By: Paul E. Murphy <murphyp@linux.ibm.com>

19 files changed, 649 insertions, 0 deletions

diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/Makefile b/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
index 0f2f58d5b9..21056e38da 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
@@ -57,6 +57,31 @@ $(objpfx)test-printf-size-ibm128.out: \
 	$(evaluate-test)
 endif
 
+ifeq ($(subdir),debug)
+ldbl-extra-routines += asprintf_chk \
+		       dprintf_chk \
+		       fprintf_chk \
+		       printf_chk \
+		       snprintf_chk \
+		       sprintf_chk \
+		       vasprintf_chk \
+		       vdprintf_chk \
+		       vfprintf_chk \
+		       vprintf_chk \
+		       vsnprintf_chk \
+		       vsprintf_chk
+
+tests-internal += test-printf-chk-ieee128 test-printf-chk-ibm128
+CFLAGS-test-printf-chk-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
+CFLAGS-test-printf-chk-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+
+tests-internal += test-printf-chk-redir-ieee128 test-printf-chk-redir-ibm128
+CFLAGS-test-printf-chk-redir-ieee128.c += -mfloat128 -mabi=ieeelongdouble \
+					  -Wno-psabi -Wno-unused-result
+CFLAGS-test-printf-chk-redir-ibm128.c += -mabi=ibmlongdouble -Wno-psabi \
+					 -Wno-unused-result
+endif
+
 # Add IEEE binary128 files as make targets.
 routines += $(foreach r,$(ldbl-extra-routines),ieee128-$(r))
 
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/Versions b/sysdeps/ieee754/ldbl-128ibm-compat/Versions
index 0485a2b5d4..aac08a3ad3 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/Versions
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/Versions
@@ -142,5 +142,19 @@ libc {
     __vfwprintfieee128;
     __vswprintfieee128;
     __vwprintfieee128;
+
+    __asprintf_chkieee128;
+    __dprintf_chkieee128;
+    __fprintf_chkieee128;
+    __printf_chkieee128;
+    __snprintf_chkieee128;
+    __sprintf_chkieee128;
+
+    __vasprintf_chkieee128;
+    __vdprintf_chkieee128;
+    __vfprintf_chkieee128;
+    __vprintf_chkieee128;
+    __vsnprintf_chkieee128;
+    __vsprintf_chkieee128;
   }
 }
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-asprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-asprintf_chk.c
new file mode 100644
index 0000000000..149fc046b6
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-asprintf_chk.c
@@ -0,0 +1,38 @@
+/* Wrapper for __asprintf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <libio/libioP.h>
+
+extern int
+___ieee128_asprintf_chk (char **string_ptr, int flag, const char *format, ...)
+{
+  va_list ap;
+  int done;
+
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  va_start (ap, format);
+  done = __vasprintf_internal (string_ptr, format, ap, mode);
+  va_end (ap);
+
+  return done;
+}
+strong_alias (___ieee128_asprintf_chk, __asprintf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-dprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-dprintf_chk.c
new file mode 100644
index 0000000000..724fb0bd43
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-dprintf_chk.c
@@ -0,0 +1,38 @@
+/* Wrapper for __dprintf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <libio/libioP.h>
+
+extern int
+___ieee128_dprintf_chk (int d, int flag, const char *format, ...)
+{
+  va_list ap;
+  int done;
+
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  va_start (ap, format);
+  done = __vdprintf_internal (d, format, ap, mode);
+  va_end (ap);
+
+  return done;
+}
+strong_alias (___ieee128_dprintf_chk, __dprintf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fprintf_chk.c
new file mode 100644
index 0000000000..fc15b0bfbd
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fprintf_chk.c
@@ -0,0 +1,38 @@
+/* Wrapper for __fprintf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <libio/libioP.h>
+
+extern int
+___ieee128_fprintf_chk (FILE *fp, int flag, const char *format, ...)
+{
+  va_list ap;
+  int done;
+
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  va_start (ap, format);
+  done = __vfprintf_internal (fp, format, ap, mode);
+  va_end (ap);
+
+  return done;
+}
+strong_alias (___ieee128_fprintf_chk, __fprintf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-printf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-printf_chk.c
new file mode 100644
index 0000000000..f3fe2900c3
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-printf_chk.c
@@ -0,0 +1,38 @@
+/* Wrapper for __printf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <libio/libioP.h>
+
+extern int
+___ieee128_printf_chk (int flag, const char *format, ...)
+{
+  va_list ap;
+  int done;
+
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  va_start (ap, format);
+  done = __vfprintf_internal (stdout, format, ap, mode);
+  va_end (ap);
+
+  return done;
+}
+strong_alias (___ieee128_printf_chk, __printf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-snprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-snprintf_chk.c
new file mode 100644
index 0000000000..7f19962dd5
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-snprintf_chk.c
@@ -0,0 +1,42 @@
+/* Wrapper for __snprintf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <libio/libioP.h>
+
+extern int
+___ieee128_snprintf_chk (char *s, size_t maxlen, int flag, size_t slen,
+			const char *format, ...)
+{
+  va_list ap;
+  int done;
+
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  if (__glibc_unlikely (slen < maxlen))
+    __chk_fail ();
+
+  va_start (ap, format);
+  done = __vsnprintf_internal (s, maxlen, format, ap, mode);
+  va_end (ap);
+
+  return done;
+}
+strong_alias (___ieee128_snprintf_chk, __snprintf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sprintf_chk.c
new file mode 100644
index 0000000000..7cea1225c0
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sprintf_chk.c
@@ -0,0 +1,42 @@
+/* Wrapper for __sprintf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <libio/libioP.h>
+
+extern int
+___ieee128_sprintf_chk (char *s, int flag, size_t slen,
+		       const char *format, ...)
+{
+  va_list ap;
+  int done;
+
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  if (slen == 0)
+    __chk_fail ();
+
+  va_start (ap, format);
+  done = __vsprintf_internal (s, slen, format, ap, mode);
+  va_end (ap);
+
+  return done;
+}
+strong_alias (___ieee128_sprintf_chk, __sprintf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vasprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vasprintf_chk.c
new file mode 100644
index 0000000000..c496ebe5a3
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vasprintf_chk.c
@@ -0,0 +1,31 @@
+/* Wrapper for __vasprintf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <libio/libioP.h>
+
+extern int
+___ieee128_vasprintf_chk (char **result_ptr, int flag, const char *format,
+			 va_list ap)
+{
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vasprintf_internal (result_ptr, format, ap, mode);
+}
+strong_alias (___ieee128_vasprintf_chk, __vasprintf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vdprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vdprintf_chk.c
new file mode 100644
index 0000000000..1b96f5fd21
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vdprintf_chk.c
@@ -0,0 +1,30 @@
+/* Wrapper for __vdprintf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <libio/libioP.h>
+
+extern int
+___ieee128_vdprintf_chk (int d, int flag, const char *format, va_list ap)
+{
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vdprintf_internal (d, format, ap, mode);
+}
+strong_alias (___ieee128_vdprintf_chk, __vdprintf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vfprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vfprintf_chk.c
new file mode 100644
index 0000000000..67b29b5e55
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vfprintf_chk.c
@@ -0,0 +1,30 @@
+/* Wrapper for __vfprintf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <libio/libioP.h>
+
+extern int
+___ieee128_vfprintf_chk (FILE *fp, int flag, const char *format, va_list ap)
+{
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vfprintf_internal (fp, format, ap, mode);
+}
+strong_alias (___ieee128_vfprintf_chk, __vfprintf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vprintf_chk.c
new file mode 100644
index 0000000000..15d3e82d76
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vprintf_chk.c
@@ -0,0 +1,30 @@
+/* Wrapper for __vprintf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <libio/libioP.h>
+
+extern int
+___ieee128_vprintf_chk (int flag, const char *format, va_list ap)
+{
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vfprintf_internal (stdout, format, ap, mode);
+}
+strong_alias (___ieee128_vprintf_chk, __vprintf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsnprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsnprintf_chk.c
new file mode 100644
index 0000000000..8df93abf33
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsnprintf_chk.c
@@ -0,0 +1,34 @@
+/* Wrapper for __vsnprintf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <libio/libioP.h>
+
+extern int
+___ieee128_vsnprintf_chk (char *string, size_t maxlen, int flag,
+			 size_t slen, const char *format, va_list ap)
+{
+  if (__glibc_unlikely (slen < maxlen))
+    __chk_fail ();
+
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vsnprintf_internal (string, maxlen, format, ap, mode);
+}
+strong_alias (___ieee128_vsnprintf_chk, __vsnprintf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsprintf_chk.c
new file mode 100644
index 0000000000..3de4c12199
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsprintf_chk.c
@@ -0,0 +1,34 @@
+/* Wrapper for __vsprintf_chk.  IEEE128 version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <libio/libioP.h>
+
+extern int
+___ieee128_vsprintf_chk (char *string, int flag, size_t slen,
+			const char *format, va_list ap)
+{
+  unsigned int mode = PRINTF_LDBL_USES_FLOAT128;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  if (slen == 0)
+    __chk_fail ();
+
+  return __vsprintf_internal (string, slen, format, ap, mode);
+}
+strong_alias (___ieee128_vsprintf_chk, __vsprintf_chkieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-ibm128.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-ibm128.c
new file mode 100644
index 0000000000..7d50284d9c
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-ibm128.c
@@ -0,0 +1 @@
+#include <test-printf-chk-ldbl-compat.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-ieee128.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-ieee128.c
new file mode 100644
index 0000000000..7d50284d9c
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-ieee128.c
@@ -0,0 +1 @@
+#include <test-printf-chk-ldbl-compat.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-ldbl-compat.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-ldbl-compat.c
new file mode 100644
index 0000000000..dce40b35fe
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-ldbl-compat.c
@@ -0,0 +1,179 @@
+/* Test for the long double variants of *printf_chk functions.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#define _FORTIFY_SOURCE 2
+
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <support/capture_subprocess.h>
+#include <support/check.h>
+
+static void
+do_test_call_varg (FILE *stream, const char *format, ...)
+{
+  char *buffer = NULL;
+  char string[128];
+  int res;
+  va_list args;
+
+  printf ("%20s", "__vasprintf_chk: ");
+  va_start (args, format);
+  res = __vasprintf_chk (&buffer, 1, format, args);
+  va_end (args);
+  if (res == -1)
+    printf ("Error using vasprintf\n");
+  if (buffer == NULL)
+    printf ("Error using vasprintf\n");
+  else
+    {
+      printf ("%s", buffer);
+      free (buffer);
+    }
+  printf ("\n");
+
+  printf ("%20s", "__vdprintf_chk: ");
+  va_start (args, format);
+  __vdprintf_chk (fileno (stream), 1, format, args);
+  va_end (args);
+  printf ("\n");
+
+  printf ("%20s", "__vfprintf_chk: ");
+  va_start (args, format);
+  __vfprintf_chk (stream, 1, format, args);
+  va_end (args);
+  printf ("\n");
+
+  printf ("%20s", "__vprintf_chk: ");
+  va_start (args, format);
+  __vprintf_chk (1, format, args);
+  va_end (args);
+  printf ("\n");
+
+  printf ("%20s", "__vsnprintf_chk: ");
+  va_start (args, format);
+  __vsnprintf_chk (string, 79, 1, 127, format, args);
+  va_end (args);
+  printf ("%s", string);
+  printf ("\n");
+
+  printf ("%20s", "__vsprintf_chk: ");
+  va_start (args, format);
+  __vsprintf_chk (string, 1, 127, format, args);
+  va_end (args);
+  printf ("%s", string);
+  printf ("\n");
+}
+
+static void
+do_test_call_rarg (FILE *stream, const char *format, long double ld)
+{
+  char *buffer = NULL;
+  char string[128];
+  int res;
+
+  printf ("%20s", "__asprintf_chk: ");
+  res = __asprintf_chk (&buffer, 1, format, ld);
+  if (res == -1)
+    printf ("Error using vasprintf\n");
+  if (buffer == NULL)
+    printf ("Error using asprintf\n");
+  else
+    {
+      printf ("%s", buffer);
+      free (buffer);
+    }
+  printf ("\n");
+
+  printf ("%20s", "__dprintf_chk: ");
+  __dprintf_chk (fileno (stream), 1, format, ld);
+  printf ("\n");
+
+  printf ("%20s", "__fprintf_chk: ");
+  __fprintf_chk (stdout, 1, format, ld);
+  printf ("\n");
+
+  printf ("%20s", "__printf_chk: ");
+  __printf_chk (1, format, ld);
+  printf ("\n");
+
+  printf ("%20s", "__snprintf_chk: ");
+  __snprintf_chk (string, 79, 1, 127, format, ld);
+  printf ("%s", string);
+  printf ("\n");
+
+  printf ("%20s", "__sprintf_chk: ");
+  __sprintf_chk (string, 1, 127, format, ld);
+  printf ("%s", string);
+  printf ("\n");
+}
+
+static void
+do_test_call (void)
+{
+  long double ld = -1;
+
+  /* Print in decimal notation.  */
+  do_test_call_rarg (stdout, "%.10Lf", ld);
+  do_test_call_varg (stdout, "%.10Lf", ld);
+
+  /* Print in hexadecimal notation.  */
+  do_test_call_rarg (stdout, "%.10La", ld);
+  do_test_call_varg (stdout, "%.10La", ld);
+}
+
+static int
+do_test (void)
+{
+  struct support_capture_subprocess result;
+  result = support_capture_subprocess ((void *) &do_test_call, NULL);
+
+  /* Compare against the expected output.  */
+  const char *expected =
+    "    __asprintf_chk: -1.0000000000\n"
+    "     __dprintf_chk: -1.0000000000\n"
+    "     __fprintf_chk: -1.0000000000\n"
+    "      __printf_chk: -1.0000000000\n"
+    "    __snprintf_chk: -1.0000000000\n"
+    "     __sprintf_chk: -1.0000000000\n"
+    "   __vasprintf_chk: -1.0000000000\n"
+    "    __vdprintf_chk: -1.0000000000\n"
+    "    __vfprintf_chk: -1.0000000000\n"
+    "     __vprintf_chk: -1.0000000000\n"
+    "   __vsnprintf_chk: -1.0000000000\n"
+    "    __vsprintf_chk: -1.0000000000\n"
+    "    __asprintf_chk: -0x1.0000000000p+0\n"
+    "     __dprintf_chk: -0x1.0000000000p+0\n"
+    "     __fprintf_chk: -0x1.0000000000p+0\n"
+    "      __printf_chk: -0x1.0000000000p+0\n"
+    "    __snprintf_chk: -0x1.0000000000p+0\n"
+    "     __sprintf_chk: -0x1.0000000000p+0\n"
+    "   __vasprintf_chk: -0x1.0000000000p+0\n"
+    "    __vdprintf_chk: -0x1.0000000000p+0\n"
+    "    __vfprintf_chk: -0x1.0000000000p+0\n"
+    "     __vprintf_chk: -0x1.0000000000p+0\n"
+    "   __vsnprintf_chk: -0x1.0000000000p+0\n"
+    "    __vsprintf_chk: -0x1.0000000000p+0\n";
+  TEST_COMPARE_STRING (expected, result.out.buffer);
+
+  return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-redir-ibm128.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-redir-ibm128.c
new file mode 100644
index 0000000000..aeab22412b
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-redir-ibm128.c
@@ -0,0 +1,2 @@
+#define _FORTIFY_SOURCE 2
+#include <sysdeps/ieee754/ldbl-128ibm-compat/test-printf-ldbl-compat.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-redir-ieee128.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-redir-ieee128.c
new file mode 100644
index 0000000000..aeab22412b
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-printf-chk-redir-ieee128.c
@@ -0,0 +1,2 @@
+#define _FORTIFY_SOURCE 2
+#include <sysdeps/ieee754/ldbl-128ibm-compat/test-printf-ldbl-compat.c>