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dnl -*- shell-script -*-
dnl
dnl Copyright (c) 2020 Intel, Inc. All rights reserved.
dnl Copyright (c) 2020 Cisco Systems, Inc. All rights reserved
dnl Copyright (c) 2022 Nanook Consulting. All rights reserved.
dnl $COPYRIGHT$
dnl
dnl Additional copyrights may follow
dnl
dnl $HEADER$
dnl
# See if there is support for ptrace options required for
# "stop-on-exec" behavior.
AC_DEFUN([PRTE_CHECK_PTRACE],[
PRTE_VAR_SCOPE_PUSH(prte_have_ptrace_traceme prte_have_ptrace_detach prte_have_ptrace_header prte_have_ptrace prte_want_stop_on_exec prte_traceme_cmd prte_detach_cmd prte_ptrace_linux_sig prte_ptrace_CFLAGS_save)
prte_have_ptrace_traceme=no
prte_have_ptrace_detach=no
prte_traceme_cmd=
prte_detach_cmd=
AC_CHECK_HEADER([sys/ptrace.h],
[prte_have_ptrace_header=1
# must manually define the header protection since check_header doesn't do it
AC_DEFINE_UNQUOTED([HAVE_SYS_PTRACE_H], [1], [Whether or not we have the ptrace header])],
[prte_have_ptrace_header=0])
AC_CHECK_FUNC([ptrace],
[prte_have_ptrace=yes],
[prte_have_ptrace=no])
if test "$prte_have_ptrace_header" = "1" && test "$prte_have_ptrace" = "yes"; then
AC_MSG_CHECKING([PTRACE_TRACEME])
AC_EGREP_CPP([yes],
[#include <sys/ptrace.h>
#ifdef PTRACE_TRACEME
yes
#endif
],
[AC_MSG_RESULT(yes)
prte_have_ptrace_traceme=yes
prte_traceme_cmd=PTRACE_TRACEME],
[AC_MSG_RESULT(no)
AC_MSG_CHECKING([PT_TRACE_ME])
AC_EGREP_CPP([yes],
[#include <sys/ptrace.h>
#ifdef PT_TRACE_ME
yes
#endif
],
[AC_MSG_RESULT(yes)
prte_have_ptrace_traceme=yes
prte_traceme_cmd=PT_TRACE_ME],
[AC_MSG_RESULT(no)
prte_have_ptrace_traceme=no])
])
AC_MSG_CHECKING([PTRACE_DETACH])
AC_EGREP_CPP([yes],
[#include <sys/ptrace.h>
#ifdef PTRACE_DETACH
yes
#endif
],
[AC_MSG_RESULT(yes)
prte_have_ptrace_detach=yes
prte_detach_cmd=PTRACE_DETACH],
[AC_MSG_RESULT(no)
AC_MSG_CHECKING(PT_DETACH)
AC_EGREP_CPP([yes],
[#include <sys/ptrace.h>
#ifdef PT_DETACH
yes
#endif
],
[AC_MSG_RESULT(yes)
prte_have_ptrace_detach=yes
prte_detach_cmd=PT_DETACH],
[AC_MSG_RESULT(no)
prte_have_ptrace_detach=no])
])
AC_MSG_CHECKING([Linux ptrace function signature])
AC_LANG_PUSH(C)
# must have -Werror set here
prte_ptrace_CFLAGS_save=$CFLAGS
CFLAGS="$CFLAGS -Werror"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include "sys/ptrace.h"]],
[[long (*ptr)(enum __ptrace_request request, pid_t pid, void *addr, void *data);]
[ptr = ptrace;]])
],[
AC_MSG_RESULT([yes])
prte_ptrace_linux_sig=1
],[
AC_MSG_RESULT([no])
prte_ptrace_linux_sig=0
])
AC_LANG_POP(C)
CFLAGS=$prte_ptrace_CFLAGS_save
fi
AC_MSG_CHECKING(ptrace stop-on-exec will be supported)
AS_IF([test "$prte_have_ptrace_traceme" = "yes" && test "$prte_have_ptrace_detach" = "yes"],
[AC_MSG_RESULT(yes)
prte_want_stop_on_exec=1],
[AC_MSG_RESULT(no)
prte_want_stop_on_exec=0])
AC_DEFINE_UNQUOTED([PRTE_HAVE_LINUX_PTRACE], [$prte_ptrace_linux_sig], [Does ptrace have the Linux signature])
AC_DEFINE_UNQUOTED([PRTE_HAVE_STOP_ON_EXEC], [$prte_want_stop_on_exec], [Whether or not we have stop-on-exec support])
AC_DEFINE_UNQUOTED([PRTE_TRACEME], [$prte_traceme_cmd], [Command for declaring that process expects to be traced by parent])
AC_DEFINE_UNQUOTED([PRTE_DETACH], [$prte_detach_cmd], [Command to detach from process being traced])
PRTE_VAR_SCOPE_POP
])
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