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New configure option '--enable-pageid' for Linux

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The option makes jemalloc use prctl with PR_SET_VMA to tag memory mappings with
"jemalloc_pg" or "jemalloc_pg_overcommit". This allows to easily identify
jemalloc's mappings in /proc/<pid>/maps. PR_SET_VMA is only available in Linux
5.17 and above.
This commit is contained in:
David Carlier 2022-06-01 22:04:11 +01:00 • committed by Alex Lapenkou
parent b950934916
commit 4fc5c4fbac
3 changed files with 59 additions and 0 deletions
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25
configure.ac
View file

@ -2067,6 +2067,14 @@ if test "x$have_memcntl" = "x1" ; then
AC_DEFINE([JEMALLOC_HAVE_MEMCNTL], [ ], [ ])
fi
AC_CHECK_FUNC([prctl],
[have_prctl="1"],
[have_prctl="0"],
)
if test "x$have_prctl" = "x1" ; then
AC_DEFINE([JEMALLOC_HAVE_PRCTL], [ ], [ ])
fi
dnl Disable lazy locking by default.
AC_ARG_ENABLE([lazy_lock],
[AS_HELP_STRING([--enable-lazy-lock],
@ -2435,6 +2443,22 @@ else
AC_DEFINE([JEMALLOC_TLS_MODEL], [ ], [ ])
fi
dnl Do not compile with debugging by default.
AC_ARG_ENABLE([pageid],
[AS_HELP_STRING([--enable-pageid],
[Enable named pages])],
[if test "x$enable_pageid" = "xno" ; then
enable_pageid="0"
else
enable_pageid="1"
fi
],
[enable_pageid="0"]
)
if test "x$enable_pageid" = "x1" ; then
AC_DEFINE([JEMALLOC_PAGEID], [ ], [ ])
fi
dnl ============================================================================
dnl Enable background threads if possible.
@ -2691,5 +2715,6 @@ AC_MSG_RESULT([xmalloc : ${enable_xmalloc}])
AC_MSG_RESULT([log : ${enable_log}])
AC_MSG_RESULT([lazy_lock : ${enable_lazy_lock}])
AC_MSG_RESULT([cache-oblivious : ${enable_cache_oblivious}])
AC_MSG_RESULT([pageid : ${enable_pageid}])
AC_MSG_RESULT([cxx : ${enable_cxx}])
AC_MSG_RESULT([===============================================================================])