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| author | Maria Matejka <mq@ucw.cz> | 2020-07-22 00:09:15 +0200 |
|---|---|---|
| committer | Maria Matejka <mq@ucw.cz> | 2021-03-25 16:47:48 +0100 |
| commit | 886dd92eeefa070d8db6aaf0245a67f7a9e9b983 (patch) | |
| tree | 67911e19951d083c003e212578fae76d93deb01c /configure.ac | |
| parent | 82f19ba95e421f00a8e99a866a2b8d9bbdba6cdc (diff) | |
Slab: head now uses bitmask for used/free nodes info instead of lists
From now, there are no auxiliary pointers stored in the free slab nodes.
This led to strange debugging problems if use-after-free happened in
slab-allocated structures, especially if the structure's first member is
a next pointer.
This also reduces the memory needed by 1 pointer per allocated object.
OTOH, we now rely on pages being aligned to their size's multiple, which
is quite common anyway.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index eabb3d56..7d92a5d4 100644 --- a/configure.ac +++ b/configure.ac @@ -351,6 +351,7 @@ case $sysdesc in esac AC_CHECK_HEADERS_ONCE([alloca.h syslog.h]) +AC_CHECK_HEADER([sys/mman.h], [AC_DEFINE([HAVE_MMAP], [1], [Define to 1 if mmap() is available.])]) AC_CHECK_MEMBERS([struct sockaddr.sa_len], [], [], [#include <sys/socket.h>]) AC_C_BIGENDIAN( |