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freebsd-dev/lib
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Edward Tomasz Napierala 92001b9497 Change the default setting of kern.ipc.shm_allow_removed from 0 to 1. 
This removes the need for manually changing this flag for Google Chrome
users. It also improves compatibility with Linux applications running under
Linuxulator compatibility layer, and possibly also helps in porting software
from Linux.

Generally speaking, the flag allows applications to create the shared memory
segment, attach it, remove it, and then continue to use it and to reattach it
later. This means that the kernel will automatically "clean up" after the
application exits.

It could be argued that it's against POSIX. However, SUSv3 says this
about IPC_RMID: "Remove the shared memory identifier specified by shmid from
the system and destroy the shared memory segment and shmid_ds data structure
associated with it." From my reading, we break it in any case by deferring
removal of the segment until it's detached; we won't break it any more
by also deferring removal of the identifier.

This is the behaviour exhibited by Linux since... probably always, and
also by OpenBSD since the following commit:

revision 1.54
date: 2011/10/27 07:56:28; author: robert; state: Exp; lines: +3 -8;
Allow segments to be used even after they were marked for deletion with
the IPC_RMID flag.
This is permitted as an extension beyond the standards and this is similar
to what other operating systems like linux do.

MFC after:	1 month
Relnotes:	yes
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D3603
2015-10-10 09:29:47 +00:00
..
atf Add META_MODE support. 2015-06-13 19:20:56 +00:00
clang Use -fpermissive if compiling with GCC. 2015-10-08 00:48:29 +00:00
csu Annotate arm userspace assembler sources stating their tolerance to 2015-09-29 16:09:58 +00:00
libalias Revert r284417 it is not necessary anymore 2015-06-15 19:28:07 +00:00
libarchive MFV r285970: 2015-07-28 18:41:28 +00:00
libauditd Add META_MODE support. 2015-06-13 19:20:56 +00:00
libbegemot new depends 2015-06-16 23:37:19 +00:00
libblocksruntime META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libbluetooth Add META_MODE support. 2015-06-13 19:20:56 +00:00
libbsdstat libbsdstat: fix warnings, set WARNS 2014-03-11 01:10:44 +00:00
libbsm Add META_MODE support. 2015-06-13 19:20:56 +00:00
libbsnmp Add META_MODE support. 2015-06-13 19:20:56 +00:00
libbz2 Add META_MODE support. 2015-06-13 19:20:56 +00:00
libc Change the default setting of kern.ipc.shm_allow_removed from 0 to 1. 2015-10-10 09:29:47 +00:00
libc_nonshared Add META_MODE support. 2015-06-13 19:20:56 +00:00
libc++ Stop linking libc++.so verbosely, there is no need to. 2015-10-06 21:28:54 +00:00
libcalendar Add META_MODE support. 2015-06-13 19:20:56 +00:00
libcam Revert r284417 it is not necessary anymore 2015-06-15 19:28:07 +00:00
libcapsicum Let the nv.h and dnv.h includes be only in sys directory. 2015-07-02 21:58:10 +00:00
libcasper Let the nv.h and dnv.h includes be only in sys directory. 2015-07-02 21:58:10 +00:00
libclang_rt Amend 287626 by adding lib/libclang_rt/safestack. 2015-09-10 20:37:00 +00:00
libcom_err new depends 2015-06-16 23:37:19 +00:00
libcompat Add META_MODE support. 2015-06-13 19:20:56 +00:00
libcompiler_rt Merge ^/head r288197 through r288456. 2015-10-01 19:02:45 +00:00
libcrypt META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libcuse META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libcxxrt Add std::uncaught_exceptions() to libcxxrt (C++17, see N4152 and N4259). 2015-10-05 17:47:23 +00:00
libdevctl Add a new device control utility for new-bus devices called devctl. This 2015-02-06 16:09:01 +00:00
libdevinfo Add META_MODE support. 2015-06-13 19:20:56 +00:00
libdevstat Add META_MODE support. 2015-06-13 19:20:56 +00:00
libdpv Add META_MODE support. 2015-06-13 19:20:56 +00:00
libdwarf new depends 2015-06-16 23:37:19 +00:00
libedit Revert r284417 it is not necessary anymore 2015-06-15 19:28:07 +00:00
libefi use .Mt to mark up email addresses consistently (part3) 2014-06-23 08:23:05 +00:00
libelf Add META_MODE support. 2015-06-13 19:20:56 +00:00
libelftc Pay attention to MK_ELFTOOLCHAIN_TOOLS so we build the desired tools. 2015-06-15 20:11:15 +00:00
libevent META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libexecinfo Add META_MODE support. 2015-06-13 19:20:56 +00:00
libexpat Revert r284417 it is not necessary anymore 2015-06-15 19:28:07 +00:00
libfetch Fix non-POSIX-compliant use of getaddrinfo in libfetch 2015-09-25 14:24:23 +00:00
libfigpar Add META_MODE support. 2015-06-13 19:20:56 +00:00
libgeom Plug memory leaks when running out of memory. 2015-08-28 06:41:40 +00:00
libgpib META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libgpio Bump .Dd for the example code update. 2015-07-01 16:50:01 +00:00
libgssapi Add META_MODE support. 2015-06-13 19:20:56 +00:00
libiconv_modules META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libipsec New AES modes for IPSec, user space components. 2015-07-03 20:09:14 +00:00
libjail Revert r284417 it is not necessary anymore 2015-06-15 19:28:07 +00:00
libkiconv Revert r284417 it is not necessary anymore 2015-06-15 19:28:07 +00:00
libkvm Add support to libkvm for reading minidumps on arm64. The kernel side is 2015-08-20 11:07:51 +00:00
libldns new depends 2015-06-16 23:37:19 +00:00
liblzma Replace beforeinstall: handling with FILES. 2015-09-18 23:49:32 +00:00
libmagic MFV r288140: update file to 5.25. 2015-09-23 05:39:20 +00:00
libmd Add new include path for sha256.h 2015-07-12 03:39:36 +00:00
libmemstat Add META_MODE support. 2015-06-13 19:20:56 +00:00
libmilter META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libmp new depends 2015-06-16 23:37:19 +00:00
libmt Revert r284417 it is not necessary anymore 2015-06-15 19:28:07 +00:00
libnandfs Import work done under project/nand (@235533) into head. 2012-05-17 10:11:18 +00:00
libnetbsd Add META_MODE support. 2015-06-13 19:20:56 +00:00
libnetgraph Add META_MODE support. 2015-06-13 19:20:56 +00:00
libngatm Add META_MODE support. 2015-06-13 19:20:56 +00:00
libnv Add support for the arrays in nvlist library. 2015-08-15 06:34:49 +00:00
libohash Include stddef.h for ptrdiff_t 2015-10-03 20:06:50 +00:00
libopie new depends 2015-06-16 23:37:19 +00:00
libpam Restore the upstream (and documented) behavior of searching for modules 2015-09-21 17:26:35 +00:00
libpcap Revert r284417 it is not necessary anymore 2015-06-15 19:28:07 +00:00
libpjdlog Revert r284417 it is not necessary anymore 2015-06-15 19:28:07 +00:00
libpmc Add META_MODE support. 2015-06-13 19:20:56 +00:00
libproc Enable libproc symbol_lookup tests on arm64 2015-08-31 20:30:06 +00:00
libprocstat Fix core corruption caused by race in note_procstat_vmmap 2015-10-06 18:07:00 +00:00
libradius new depends 2015-06-16 23:37:19 +00:00
librpcsec_gss META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
librpcsvc Add META_MODE support. 2015-06-13 19:20:56 +00:00
librt Add META_MODE support. 2015-06-13 19:20:56 +00:00
librtld_db Add META_MODE support. 2015-06-13 19:20:56 +00:00
libsbuf new depends 2015-06-16 23:37:19 +00:00
libsdp Add META_MODE support. 2015-06-13 19:20:56 +00:00
libsm Update META_MODE dependencies. 2015-09-17 05:06:34 +00:00
libsmb META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libsmdb Add META_MODE support. 2015-06-13 19:20:56 +00:00
libsmutil Add META_MODE support. 2015-06-13 19:20:56 +00:00
libsqlite3 Move the USE_PREAD configuration knob out of the middle of the autoconf 2015-08-09 05:54:53 +00:00
libstand If we can't open the file, skip devclose() for the exclusive_file_system 2015-10-08 17:59:05 +00:00
libstdbuf META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libstdthreads META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libtacplus Add META_MODE support. 2015-06-13 19:20:56 +00:00
libtelnet Add META_MODE support. 2015-06-13 19:20:56 +00:00
libthr Style. Use ANSI definition, wrap long lines, no initialization in 2015-09-08 08:48:53 +00:00
libthread_db new depends 2015-06-16 23:37:19 +00:00
libucl Add META_MODE support. 2015-06-13 19:20:56 +00:00
libufs Revert r284417 it is not necessary anymore 2015-06-15 19:28:07 +00:00
libugidfw Fix 'ugidfw remove' after r284251 incorrectly changed it. 2015-09-29 18:48:12 +00:00
libulog Revert r284417 it is not necessary anymore 2015-06-15 19:28:07 +00:00
libunbound META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libusb Remove redundant COMPAT_32BIT guard on pkgconfig files. This is already handled 2015-10-03 16:34:21 +00:00
libusbhid Add META_MODE support. 2015-06-13 19:20:56 +00:00
libutil Fix core corruption caused by race in note_procstat_vmmap 2015-10-06 18:07:00 +00:00
libvgl META_MODE: Remove DEP_RELDIR from Makefile.depend files. 2015-09-25 19:26:08 +00:00
libvmmapi Move the 'devmem' device nodes from /dev/vmm to /dev/vmm.io 2015-07-06 19:41:43 +00:00
libwrap Add META_MODE support. 2015-06-13 19:20:56 +00:00
libxo Move SHLIBDIR?=/lib before <src.opts.mk> so that it works again. 2015-10-08 01:17:45 +00:00
liby Add META_MODE support. 2015-06-13 19:20:56 +00:00
libypclnt new depends 2015-06-16 23:37:19 +00:00
libz Remove redundant COMPAT_32BIT guard on pkgconfig files. This is already handled 2015-10-03 16:34:21 +00:00
msun Revert r286421, now that the fix for LLVM PR24343 is in. 2015-09-24 21:39:31 +00:00
ncurses Add missing CLEANFILES. 2015-09-26 01:04:52 +00:00
tests Install category Kyuafiles from their category directories. 2013-11-08 14:29:06 +00:00
Makefile Roll WITHOUT_ELFTOOLCHAIN_TOOLS into WITHOUT_TOOLCHAIN 2015-08-13 17:50:47 +00:00
Makefile.inc