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Replace --disable-munmap with opt.munmap.

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Control use of munmap(2) via a run-time option rather than a
compile-time option (with the same per platform default).  The old
behavior of --disable-munmap can be achieved with
--with-malloc-conf=munmap:false.

This partially resolves #580.
This commit is contained in:
Jason Evans 2017-04-24 17:28:55 -07:00
parent e2cc6280ed
commit c67c3e4a63
16 changed files with 77 additions and 85 deletions
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16
configure.ac
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@ -1086,21 +1086,10 @@ if test "x${maps_coalesce}" = "x1" ; then
AC_DEFINE([JEMALLOC_MAPS_COALESCE], [ ])
fi
dnl Enable VM deallocation via munmap() by default.
AC_ARG_ENABLE([munmap],
[AS_HELP_STRING([--disable-munmap], [Disable VM deallocation via munmap(2)])],
[if test "x$enable_munmap" = "xno" ; then
enable_munmap="0"
else
enable_munmap="1"
fi
],
[enable_munmap="${default_munmap}"]
)
if test "x$enable_munmap" = "x1" ; then
dnl Indicate whether to use munmap() by default.
if test "x$default_munmap" = "x1" ; then
AC_DEFINE([JEMALLOC_MUNMAP], [ ])
fi
AC_SUBST([enable_munmap])
dnl Enable allocation from DSS if supported by the OS.
have_dss="1"
@ -2076,7 +2065,6 @@ AC_MSG_RESULT([prof-gcc : ${enable_prof_gcc}])
AC_MSG_RESULT([fill : ${enable_fill}])
AC_MSG_RESULT([utrace : ${enable_utrace}])
AC_MSG_RESULT([xmalloc : ${enable_xmalloc}])
AC_MSG_RESULT([munmap : ${enable_munmap}])
AC_MSG_RESULT([lazy_lock : ${enable_lazy_lock}])
AC_MSG_RESULT([cache-oblivious : ${enable_cache_oblivious}])
AC_MSG_RESULT([cxx : ${enable_cxx}])