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libbacktrace: support fetching executable name using sysctl

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This supports FreeBSD and NetBSD when /proc is not mounted.
This commit is contained in:
Ian Lance Taylor
2020-02-15 15:33:11 -08:00
parent 559ab7cab4
commit 0f06cda953
4 changed files with 191 additions and 1 deletions
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30
configure.ac
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@@ -395,6 +395,36 @@ if test "$have_getexecname" = "yes"; then
AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.])
fi
# Check for sysctl definitions.
AC_CACHE_CHECK([for KERN_PROC],
[libbacktrace_cv_proc],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#include <sys/types.h>
#include <sys/sysctl.h>
], [int mib0 = CTL_KERN; int mib1 = KERN_PROC; int mib2 = KERN_PROC_PATHNAME;])],
[libbacktrace_cv_proc=yes],
[libbacktrace_cv_proc=no])])
if test "$libbacktrace_cv_proc" = "yes"; then
AC_DEFINE([HAVE_KERN_PROC], 1,
[Define to 1 if you have KERN_PROC and KERN_PROC_PATHNAME in <sys/sysctl.h>.])
fi
AC_CACHE_CHECK([for KERN_PROG_ARGS],
[libbacktrace_cv_procargs],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#include <sys/types.h>
#include <sys/sysctl.h>
], [int mib0 = CTL_KERN; int mib1 = KERN_PROC_ARGS; int mib2 = KERN_PROC_PATHNAME;])],
[libbacktrace_cv_procargs=yes],
[libbacktrace_cv_procargs=no])])
if test "$libbacktrace_cv_procargs" = "yes"; then
AC_DEFINE([HAVE_KERN_PROC_ARGS], 1,
[Define to 1 if you have KERN_PROCARGS and KERN_PROC_PATHNAME in <sys/sysctl.h>.])
fi
# Check for the clock_gettime function.
AC_CHECK_FUNCS(clock_gettime)
clock_gettime_link=