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Make dss non-optional, and fix an "arena.<i>.dss" mallctl bug.

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Make dss non-optional on all platforms which support sbrk(2).

Fix the "arena.<i>.dss" mallctl to return an error if "primary" or
"secondary" precedence is specified, but sbrk(2) is not supported.
This commit is contained in:
Jason Evans
2014-04-15 12:09:48 -07:00
parent 644d414bc9
commit 4d434adb14
13 changed files with 72 additions and 73 deletions
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23
configure.ac
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@@ -836,34 +836,22 @@ if test "x$enable_munmap" = "x1" ; then
fi
AC_SUBST([enable_munmap])
dnl Do not enable allocation from DSS by default.
AC_ARG_ENABLE([dss],
[AS_HELP_STRING([--enable-dss], [Enable allocation from DSS])],
[if test "x$enable_dss" = "xno" ; then
enable_dss="0"
else
enable_dss="1"
fi
],
[enable_dss="0"]
)
dnl Enable allocation from DSS if supported by the OS.
have_dss="1"
dnl Check whether the BSD/SUSv1 sbrk() exists. If not, disable DSS support.
AC_CHECK_FUNC([sbrk], [have_sbrk="1"], [have_sbrk="0"])
if test "x$have_sbrk" = "x1" ; then
if test "x$sbrk_deprecated" == "x1" ; then
AC_MSG_RESULT([Disabling dss allocation because sbrk is deprecated])
enable_dss="0"
else
AC_DEFINE([JEMALLOC_HAVE_SBRK], [ ])
have_dss="0"
fi
else
enable_dss="0"
have_dss="0"
fi
if test "x$enable_dss" = "x1" ; then
if test "x$have_dss" = "x1" ; then
AC_DEFINE([JEMALLOC_DSS], [ ])
fi
AC_SUBST([enable_dss])
dnl Support the junk/zero filling option by default.
AC_ARG_ENABLE([fill],
@@ -1461,7 +1449,6 @@ AC_MSG_RESULT([valgrind : ${enable_valgrind}])
AC_MSG_RESULT([xmalloc : ${enable_xmalloc}])
AC_MSG_RESULT([mremap : ${enable_mremap}])
AC_MSG_RESULT([munmap : ${enable_munmap}])
AC_MSG_RESULT([dss : ${enable_dss}])
AC_MSG_RESULT([lazy_lock : ${enable_lazy_lock}])
AC_MSG_RESULT([tls : ${enable_tls}])
AC_MSG_RESULT([===============================================================================])