debug: Remove catchsegv and libSegfault (BZ #14913)

Trapping SIGSEGV within the process is error-prone, adds security
issues, and modern analysis design tends to happen out of the
process (either by attaching a debugger or by post-mortem analysis).

The libSegfault also has some design problems, it uses non
async-signal-safe function (backtrace) on signal handler.

There are multiple alternatives if users do want to use similar
functionality, such as sigsegv gnulib module or libsegfault.

2 files changed, 0 insertions, 259 deletions

diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/register-dump.h b/sysdeps/unix/sysv/linux/s390/s390-32/register-dump.h
deleted file mode 100644
index 51aa1e4cc0..0000000000
--- a/sysdeps/unix/sysv/linux/s390/s390-32/register-dump.h
+++ /dev/null
@@ -1,128 +0,0 @@
-/* Dump registers.
-   Copyright (C) 2000-2022 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/>.  */
-
-#include <sys/uio.h>
-#include <_itoa.h>
-
-/* We will print the register dump in this format:
-
- GPR0: XXXXXXXX  GPR1: XXXXXXXX  GPR2: XXXXXXXX  GPR3: XXXXXXXX
- GPR4: XXXXXXXX  GPR5: XXXXXXXX  GPR6: XXXXXXXX  GPR7: XXXXXXXX
- GPR8: XXXXXXXX  GPR9: XXXXXXXX  GPRA: XXXXXXXX  GPRB: XXXXXXXX
- GPRC: XXXXXXXX  GPRD: XXXXXXXX  GPRE: XXXXXXXX  GPRF: XXXXXXXX
-
- PSW.MASK: XXXXXXXX   PSW.ADDR: XXXXXXXX
-
- ST(0) XXXX XXXXXXXXXXXXXXXX   ST(1) XXXX XXXXXXXXXXXXXXXX
- ST(2) XXXX XXXXXXXXXXXXXXXX   ST(3) XXXX XXXXXXXXXXXXXXXX
- ST(4) XXXX XXXXXXXXXXXXXXXX   ST(5) XXXX XXXXXXXXXXXXXXXX
- ST(6) XXXX XXXXXXXXXXXXXXXX   ST(7) XXXX XXXXXXXXXXXXXXXX
-
- */
-
-static void
-hexvalue (unsigned long int value, char *buf, size_t len)
-{
-  char *cp = _itoa_word (value, buf + len, 16, 0);
-  while (cp > buf)
-    *--cp = '0';
-}
-
-static void
-register_dump (int fd, struct ucontext_t *ctx)
-{
-  char regs[19][8];
-  struct iovec iov[40];
-  size_t nr = 0;
-
-#define ADD_STRING(str) \
-  iov[nr].iov_base = (char *) str;					      \
-  iov[nr].iov_len = strlen (str);					      \
-  ++nr
-#define ADD_MEM(str, len) \
-  iov[nr].iov_base = str;						      \
-  iov[nr].iov_len = len;						      \
-  ++nr
-
-  /* Generate strings of register contents.  */
-  hexvalue (ctx->uc_mcontext.gregs[0], regs[0], 8);
-  hexvalue (ctx->uc_mcontext.gregs[1], regs[1], 8);
-  hexvalue (ctx->uc_mcontext.gregs[2], regs[2], 8);
-  hexvalue (ctx->uc_mcontext.gregs[3], regs[3], 8);
-  hexvalue (ctx->uc_mcontext.gregs[4], regs[4], 8);
-  hexvalue (ctx->uc_mcontext.gregs[5], regs[5], 8);
-  hexvalue (ctx->uc_mcontext.gregs[6], regs[6], 8);
-  hexvalue (ctx->uc_mcontext.gregs[7], regs[7], 8);
-  hexvalue (ctx->uc_mcontext.gregs[8], regs[8], 8);
-  hexvalue (ctx->uc_mcontext.gregs[9], regs[9], 8);
-  hexvalue (ctx->uc_mcontext.gregs[10], regs[10], 8);
-  hexvalue (ctx->uc_mcontext.gregs[11], regs[11], 8);
-  hexvalue (ctx->uc_mcontext.gregs[12], regs[12], 8);
-  hexvalue (ctx->uc_mcontext.gregs[13], regs[13], 8);
-  hexvalue (ctx->uc_mcontext.gregs[14], regs[14], 8);
-  hexvalue (ctx->uc_mcontext.gregs[15], regs[15], 8);
-  hexvalue (ctx->uc_mcontext.psw.mask, regs[16], 8);
-  hexvalue (ctx->uc_mcontext.psw.addr, regs[17], 8);
-
-  /* Generate the output.  */
-  ADD_STRING ("Register dump:\n\n GPR0: ");
-  ADD_MEM (regs[0], 8);
-  ADD_STRING ("  GPR1: ");
-  ADD_MEM (regs[1], 8);
-  ADD_STRING ("  GPR2: ");
-  ADD_MEM (regs[2], 8);
-  ADD_STRING ("  GPR3: ");
-  ADD_MEM (regs[3], 8);
-  ADD_STRING ("\n GPR4: ");
-  ADD_MEM (regs[4], 8);
-  ADD_STRING ("  GPR5: ");
-  ADD_MEM (regs[5], 8);
-  ADD_STRING ("  GPR6: ");
-  ADD_MEM (regs[6], 8);
-  ADD_STRING ("  GPR7: ");
-  ADD_MEM (regs[7], 8);
-  ADD_STRING ("\n GPR8: ");
-  ADD_MEM (regs[8], 8);
-  ADD_STRING ("  GPR9: ");
-  ADD_MEM (regs[9], 8);
-  ADD_STRING ("  GPRA: ");
-  ADD_MEM (regs[10], 8);
-  ADD_STRING ("  GPRB: ");
-  ADD_MEM (regs[11], 8);
-  ADD_STRING ("\n GPRC: ");
-  ADD_MEM (regs[12], 8);
-  ADD_STRING ("  GPRD: ");
-  ADD_MEM (regs[13], 8);
-  ADD_STRING ("  GPRE: ");
-  ADD_MEM (regs[14], 8);
-  ADD_STRING ("  GPRF: ");
-  ADD_MEM (regs[15], 8);
-  ADD_STRING ("\n\n PSW.MASK: ");
-  ADD_MEM (regs[16], 8);
-  ADD_STRING ("  PSW.ADDR: ");
-  ADD_MEM (regs[17], 8);
-  ADD_STRING ("  TRAP: ");
-  ADD_MEM (regs[18], 4);
-  ADD_STRING ("\n");
-
-  /* Write the stuff out.  */
-  writev (fd, iov, nr);
-}
-
-
-#define REGISTER_DUMP register_dump (fd, ctx)
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/register-dump.h b/sysdeps/unix/sysv/linux/s390/s390-64/register-dump.h
deleted file mode 100644
index 3fcbfd1f96..0000000000
--- a/sysdeps/unix/sysv/linux/s390/s390-64/register-dump.h
+++ /dev/null
@@ -1,131 +0,0 @@
-/* Dump registers.  64 bit S/390 version.
-   Copyright (C) 2001-2022 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/>.  */
-
-#include <sys/uio.h>
-#include <_itoa.h>
-
-/* We will print the register dump in this format:
-
- GPR0: XXXXXXXXXXXXXXXX  GPR1: XXXXXXXXXXXXXXXX
- GPR2: XXXXXXXXXXXXXXXX  GPR3: XXXXXXXXXXXXXXXX
- GPR4: XXXXXXXXXXXXXXXX  GPR5: XXXXXXXXXXXXXXXX
- GPR6: XXXXXXXXXXXXXXXX  GPR7: XXXXXXXXXXXXXXXX
- GPR8: XXXXXXXXXXXXXXXX  GPR9: XXXXXXXXXXXXXXXX
- GPRA: XXXXXXXXXXXXXXXX  GPRB: XXXXXXXXXXXXXXXX
- GPRC: XXXXXXXXXXXXXXXX  GPRD: XXXXXXXXXXXXXXXX
- GPRE: XXXXXXXXXXXXXXXX  GPRF: XXXXXXXXXXXXXXXX
-
- PSW.MASK: XXXXXXXXXXXXXXXX   PSW.ADDR: XXXXXXXXXXXXXXXX
-
- ST(0) XXXX XXXXXXXXXXXXXXXX   ST(1) XXXX XXXXXXXXXXXXXXXX
- ST(2) XXXX XXXXXXXXXXXXXXXX   ST(3) XXXX XXXXXXXXXXXXXXXX
- ST(4) XXXX XXXXXXXXXXXXXXXX   ST(5) XXXX XXXXXXXXXXXXXXXX
- ST(6) XXXX XXXXXXXXXXXXXXXX   ST(7) XXXX XXXXXXXXXXXXXXXX
- */
-
-static void
-hexvalue (unsigned long int value, char *buf, size_t len)
-{
-  char *cp = _itoa_word (value, buf + len, 16, 0);
-  while (cp > buf)
-    *--cp = '0';
-}
-
-static void
-register_dump (int fd, struct ucontext_t *ctx)
-{
-  char regs[19][16];
-  struct iovec iov[40];
-  size_t nr = 0;
-
-#define ADD_STRING(str) \
-  iov[nr].iov_base = (char *) str;					      \
-  iov[nr].iov_len = strlen (str);					      \
-  ++nr
-#define ADD_MEM(str, len) \
-  iov[nr].iov_base = str;						      \
-  iov[nr].iov_len = len;						      \
-  ++nr
-
-  /* Generate strings of register contents.  */
-  hexvalue (ctx->uc_mcontext.gregs[0], regs[0], 16);
-  hexvalue (ctx->uc_mcontext.gregs[1], regs[1], 16);
-  hexvalue (ctx->uc_mcontext.gregs[2], regs[2], 16);
-  hexvalue (ctx->uc_mcontext.gregs[3], regs[3], 16);
-  hexvalue (ctx->uc_mcontext.gregs[4], regs[4], 16);
-  hexvalue (ctx->uc_mcontext.gregs[5], regs[5], 16);
-  hexvalue (ctx->uc_mcontext.gregs[6], regs[6], 16);
-  hexvalue (ctx->uc_mcontext.gregs[7], regs[7], 16);
-  hexvalue (ctx->uc_mcontext.gregs[8], regs[8], 16);
-  hexvalue (ctx->uc_mcontext.gregs[9], regs[9], 16);
-  hexvalue (ctx->uc_mcontext.gregs[10], regs[10], 16);
-  hexvalue (ctx->uc_mcontext.gregs[11], regs[11], 16);
-  hexvalue (ctx->uc_mcontext.gregs[12], regs[12], 16);
-  hexvalue (ctx->uc_mcontext.gregs[13], regs[13], 16);
-  hexvalue (ctx->uc_mcontext.gregs[14], regs[14], 16);
-  hexvalue (ctx->uc_mcontext.gregs[15], regs[15], 16);
-  hexvalue (ctx->uc_mcontext.psw.mask, regs[16], 16);
-  hexvalue (ctx->uc_mcontext.psw.addr, regs[17], 16);
-
-  /* Generate the output.  */
-  ADD_STRING ("Register dump:\n\n GPR0: ");
-  ADD_MEM (regs[0], 16);
-  ADD_STRING ("  GPR1: ");
-  ADD_MEM (regs[1], 16);
-  ADD_STRING ("  GPR2: ");
-  ADD_MEM (regs[2], 16);
-  ADD_STRING ("  GPR3: ");
-  ADD_MEM (regs[3], 16);
-  ADD_STRING ("\n GPR4: ");
-  ADD_MEM (regs[4], 16);
-  ADD_STRING ("  GPR5: ");
-  ADD_MEM (regs[5], 16);
-  ADD_STRING ("  GPR6: ");
-  ADD_MEM (regs[6], 16);
-  ADD_STRING ("  GPR7: ");
-  ADD_MEM (regs[7], 16);
-  ADD_STRING ("\n GPR8: ");
-  ADD_MEM (regs[8], 16);
-  ADD_STRING ("  GPR9: ");
-  ADD_MEM (regs[9], 16);
-  ADD_STRING ("  GPRA: ");
-  ADD_MEM (regs[10], 16);
-  ADD_STRING ("  GPRB: ");
-  ADD_MEM (regs[11], 16);
-  ADD_STRING ("\n GPRC: ");
-  ADD_MEM (regs[12], 16);
-  ADD_STRING ("  GPRD: ");
-  ADD_MEM (regs[13], 16);
-  ADD_STRING ("  GPRE: ");
-  ADD_MEM (regs[14], 16);
-  ADD_STRING ("  GPRF: ");
-  ADD_MEM (regs[15], 16);
-  ADD_STRING ("\n\n PSW.MASK: ");
-  ADD_MEM (regs[16], 16);
-  ADD_STRING ("  PSW.ADDR: ");
-  ADD_MEM (regs[17], 16);
-  ADD_STRING ("  TRAP: ");
-  ADD_MEM (regs[18], 4);
-  ADD_STRING ("\n");
-
-  /* Write the stuff out.  */
-  writev (fd, iov, nr);
-}
-
-
-#define REGISTER_DUMP register_dump (fd, ctx)