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55a1911ef2
freebsd-dev/lib
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Konstantin Belousov 55a1911ef2 The getcontext() from the __fillcontextx() call in the 
check_deferred_signal() returns twice, since handle_signal() emulates
the return from the normal signal handler by sigreturn(2)ing the
passed context.  Second return is performed on the destroyed stack
frame, because __fillcontextx() has already returned.  This causes
undefined and bad behaviour, usually the victim thread gets SIGSEGV.

Avoid nested frame and the need to return from it by doing direct call
to getcontext() in the check_deferred_signal() and using a new private
libc helper __fillcontextx2() to complement the context with the
extended CPU state if the deferred signal is still present.

The __fillcontextx() is now unused, but is kept to allow older
libthr.so to be used with the new libc.

Mark __fillcontextx() as returning twice [1].

Reported by:	pgj
Pointy hat to:	kib
Discussed with:	dim
Tested by:	pgj, dim
Suggested by:	jilles [1]
MFC after:	1 week
2013-05-28 04:54:16 +00:00
..
atf Remove -L<path> from LDADD, it doesn't belong there. 2012-11-07 00:23:51 +00:00
bind Update to 9.8.4-P2 2013-03-27 10:11:43 +00:00
clang Use an ugly hack to get around bootstrapping problems when building 2013-05-13 20:14:58 +00:00
csu Add a makefle that recurses into the right architecture-specific 2013-05-21 17:47:53 +00:00
libalias
libarchive MFV r248590,248594: 2013-03-22 13:36:03 +00:00
libauditd
libbegemot
libblocksruntime
libbluetooth General mdoc(7) and typo fixes. 2012-05-11 20:06:46 +00:00
libbsm
libbsnmp Add missing DPADD 2013-01-01 18:29:25 +00:00
libbz2
libc The getcontext() from the __fillcontextx() call in the 2013-05-28 04:54:16 +00:00
libc++ Fix broken macro checking in the libc++ Makefile, introduced in r241909. 2012-11-02 12:18:38 +00:00
libcalendar
libcam Use snprintf(3) constantly when generating CAM error messages. 2012-03-03 09:19:20 +00:00
libcom_err - Update FreeBSD Heimdal distribution to version 1.5.1. This also brings 2012-03-22 08:48:42 +00:00
libcompat
libcompiler_rt Unbreak <stdatomic.h> on ARM + Clang. 2013-04-27 04:56:02 +00:00
libcrypt Simple unit-tests for libcrypt, to show how easy it is. 2012-11-07 22:03:59 +00:00
libcxxrt Add several missing symbols to libcxxrt's symbol version map, and remove 2013-02-03 20:40:41 +00:00
libdevinfo
libdevstat New devstat metrics for devstat_compute_statistics(): 2012-12-15 18:19:48 +00:00
libdwarf libdwarf: anonymous types are expected to have empty type names... 2013-03-23 08:50:56 +00:00
libedit libedit: Revert r247683 to fix buildworld. 2013-03-03 14:42:15 +00:00
libefi
libelf Merge part of r1712 from elftoolchain, making it possible to resize ELF 2013-02-24 15:15:50 +00:00
libexpat Update base system libexpat to 2.1.0. 2013-02-26 00:58:44 +00:00
libfetch Use the CONNECT method to proxy HTTPS connections through HTTP proxies. 2013-04-12 22:05:15 +00:00
libgeom Improve libgeom XML parsing error handling. 2012-10-26 12:46:33 +00:00
libgpib mdoc: minor Bl improvements. 2012-06-02 08:47:26 +00:00
libgssapi mdoc: add missing -width argument to Bl -tag. 2012-06-08 12:09:00 +00:00
libiconv Remove redundant assignments to WARNS. 2011-06-06 20:24:17 +00:00
libiconv_modules
libipsec Improve compatibility with recent flex from flex.sourceforge.net. 2013-05-03 23:51:32 +00:00
libipx
libjail Fix some memory allocation errors: 2012-10-04 19:07:05 +00:00
libkiconv no one bothered to write the iconv.9 man page... If it appears we 2013-02-26 19:46:02 +00:00
libkse Fix typo in ".PATH" 2012-04-18 07:02:53 +00:00
libkvm libkvm: Make second /dev/null file descriptor close-on-exec as well. 2013-05-04 11:45:48 +00:00
libldns Clean up. 2013-04-14 00:59:56 +00:00
liblzma Update xz to git snapshot of v5.0 branch as of 20110711 (post-5.0.3) 2011-07-11 14:15:27 +00:00
libmagic r235638 is not the clean way to add support for building on ancient FreeBSD 2012-09-11 22:38:33 +00:00
libmandoc Merge mandoc from vendor into contrib and provide the necessary Makefile glue. 2012-10-19 22:21:01 +00:00
libmd Remove the RFC 1319 MD2 Message-Digest Algorithm routines from libmd. 2012-04-28 02:48:51 +00:00
libmemstat Const-ify the zone name argument to uma_zcreate(9). 2012-10-26 17:51:05 +00:00
libmilter
libmp Fix whitespace inconsistencies found in homegrown Symbol.maps. 2011-10-07 15:05:24 +00:00
libnandfs Import work done under project/nand (@235533) into head. 2012-05-17 10:11:18 +00:00
libnetbsd Add libnetbsd, a thin compatibility layer intended to allow a limited 2012-12-21 20:37:38 +00:00
libnetgraph Fix for quite a special case when userland emulates a netgraph node, and 2013-03-11 13:05:11 +00:00
libngatm
libopie X11BASE has been deprecated for a long time and will die soon 2012-01-09 00:48:19 +00:00
libpam Backport upstream r684 (OPENPAM_DEBUG enables debugging macros but does 2013-04-14 16:49:27 +00:00
libpcap MFV: libpcap 1.3.0. 2012-10-05 18:42:50 +00:00
libpmc Always install pmc.foo(3) manpages. 2013-05-03 08:20:10 +00:00
libproc - Compute the correct size to reallocate when doubling the size of the 2013-01-28 15:48:31 +00:00
libprocstat Make errbuf optional, so if a caller is not interested in an error 2013-05-08 19:11:47 +00:00
libradius mdoc sweep. 2013-05-12 22:22:12 +00:00
librpcsec_gss Fix warnings found by -Wmising-variable-declarations. 2012-10-19 05:43:38 +00:00
librpcsvc Consistently set RPCGEN_CPP when running rpcgen, so the C preprocessor 2012-02-07 09:27:07 +00:00
librt Register signal 33 explicitly as reserved by real-time library, and 2012-03-26 19:12:09 +00:00
librtld_db Bump shared libraries version numbers in preparation for 9.0. 2011-08-28 09:26:48 +00:00
libsbuf Add sbuf_start_section and sbuf_end_section to the libsbuf symbol map. 2013-04-11 19:50:10 +00:00
libsdp Change the SDP_GET* macros to cast to a const buffer. 2011-10-16 08:45:16 +00:00
libsm Since clang 3.2 now has an option to suppress warnings about implicitly 2013-02-16 20:17:31 +00:00
libsmb
libsmdb
libsmutil
libstand Enable building string functions as part of libstand on mips; the Makefile 2013-04-28 16:35:24 +00:00
libstdbuf Remove WARNS=6 lines. 2012-10-18 15:39:29 +00:00
libstdthreads Pull up vendor changes to mdoc(7) 2012-01-05 21:36:12 +00:00
libtacplus mdoc sweep. 2013-05-12 22:22:12 +00:00
libtelnet - Do not use deprecated krb5 error message reporting functions in libtelnet. 2012-04-06 00:03:45 +00:00
libthr The getcontext() from the __fillcontextx() call in the 2013-05-28 04:54:16 +00:00
libthread_db Fix warnings found by -Wmising-variable-declarations. 2012-10-19 05:43:38 +00:00
libufs Make berase() work on platforms whose kernel lacks DIOCGDELETE ioctl. 2011-12-08 12:31:47 +00:00
libugidfw
libulog Properly use SHA1_Final() instead of SHA_Final(). 2012-04-19 15:28:15 +00:00
libusb mdoc sweep. 2013-05-12 22:22:12 +00:00
libusbhid Restore handling of the third argument (id) of hid_start_parse(), same as 2012-09-20 18:56:27 +00:00
libutil When pidptr was passed as NULL to pidfile_open(3), we were returning 2013-03-14 20:22:52 +00:00
libvgl Fix various typos in manual pages. 2012-02-25 14:31:25 +00:00
libvmmapi Remove deprecated APIs to get the total and free memory available to vmm.ko. 2013-04-25 20:42:21 +00:00
libwrap
liby
libyaml Add a stub manpage modeled over the libexpat one to explain to users not to use 2013-03-05 13:06:40 +00:00
libypclnt Consistently set RPCGEN_CPP when running rpcgen, so the C preprocessor 2012-02-07 09:27:07 +00:00
libz MFV: Update zlib to 1.2.8. 2013-05-05 06:20:49 +00:00
msun Style(9) 2013-05-27 22:45:05 +00:00
ncurses Only install manpages and html documentation in the ncurses/*w (wchar) 2013-01-24 16:38:47 +00:00
Makefile Wrap the creation of the ../include link in /usr/lib in 2013-04-30 18:14:22 +00:00
Makefile.inc