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760e34772c
freebsd-dev/lib/libc
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Konstantin Belousov 760e34772c Fix order of destructors between main binary and libraries. 
Since inits for the main binary are run from rtld (for some time), the
rtld_exit atexit(3) handler, which is passed from rtld to the program
entry and installed by csu, is installed after any atexit(3) handlers
installed by main binary constructors.  This means that rtld_exit() is
fired before main binary handlers.

Typical C++ static constructors are executed from init (either binary
or libs) but use atexit(3) to ensure that destructors are called in
the right order, independent of the linking order.  Also, C++
libraries finalizers call __cxa_finalize(3) to flush library'
atexit(3) entries.  Since atexit(3) entry is cleared after being run,
this would be mostly innocent, except that, atexit(rtld_exit) done
after main binary constructors, makes destructors from libraries
executed before destructors for main.

Fix by reordering atexit(rtld_exit) before inits for main binary, same
as it happened when inits were called by csu.  Do it using new private
libc symbol with pre-defined ABI.

Reported. tested, and reviewed by:	kan
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2019-04-15 13:03:09 +00:00
..
aarch64 Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
amd64 Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
arm Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
capability Replace dot-dot relative pathing with SRCTOP-relative paths where possible 2017-01-20 03:23:24 +00:00
compat-43 General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
db Remove "All rights reserved" from my files. 2018-05-10 06:41:08 +00:00
gdtoa libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
gen Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
gmon mcount: tidy up ANSIfication 2018-10-20 22:39:35 +00:00
i386 Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
iconv libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
include Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
inet libc: fix cases of undefined behavior. 2018-08-07 15:24:19 +00:00
isc SPDX: more ISC-related files. 2017-12-08 17:52:53 +00:00
locale Fix WITHOUT_ICONV build after r340276. 2018-11-14 09:06:15 +00:00
md Replace dot-dot relative pathing with SRCTOP-relative paths where possible 2017-01-20 03:23:24 +00:00
mips Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
nameser SPDX: license IDs for some ISC-related files. 2017-12-08 15:57:29 +00:00
net Use IN_foo() macros from sys/netinet/in.h inplace of handcrafted code 2019-04-04 19:01:13 +00:00
nls Create new EINTEGRITY error with message "Integrity check failed". 2019-01-17 06:35:45 +00:00
posix1e Remove some redundant code in _posix1e_acl_strip_np 2019-02-19 19:15:15 +00:00
powerpc Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
powerpc64 Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
powerpcspe Fix fabs(3) for powerpcspe, this time for real 2018-07-26 14:42:20 +00:00
quad ANSIfy libc/quad 2018-10-21 00:20:40 +00:00
regex regcomp: revert part of r341838 which turned out to be unrelated 2018-12-19 23:28:56 +00:00
resolv Allow the use of TCP instead of UDP for queries by setting options usevc 2018-08-16 13:18:40 +00:00
riscv Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
rpc Fix CONFS to append the value in this case. 2018-09-18 01:38:44 +00:00
secure Carefully update stack guard bytes inside __guard_setup(). 2018-04-24 15:59:39 +00:00
softfloat Add implementations for clog(3), clogf(3), and clog(3). 2018-05-13 09:54:34 +00:00
sparc64 Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
stdio GC a historical artifact. 2019-02-07 23:17:44 +00:00
stdlib Fix order of destructors between main binary and libraries. 2019-04-15 13:03:09 +00:00
stdtime strptime: make %k and %l specifiers match their description in 2018-11-03 23:37:13 +00:00
string libc: update strstr implementation to match musl 2019-04-09 15:52:18 +00:00
sys .Xr protect(1) and proccontrol(1) from procctl(2). 2019-04-09 10:09:59 +00:00
tests Allow users to override CSTD/CXXSTD on a per-prog basis 2019-03-29 18:49:08 +00:00
uuid libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
x86 pkru(3) man page. 2019-02-20 10:03:03 +00:00
xdr General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
yp libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
libc_nossp.ldscript Add different libc ldscript: the one without libssp -- 2016-10-12 13:19:21 +00:00
libc.ldscript
Makefile revert r341429 "disable BIND_NOW in libc, libthr, and rtld" 2019-03-28 02:12:32 +00:00
Makefile.depend DIRDEPS_BUILD: Regenerate without local dependencies. 2016-02-24 17:20:11 +00:00
Versions.def Create namespace for the symbols added during 13-CURRENT cycle. 2018-11-12 19:12:14 +00:00