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17 Commits

Author SHA1 Message Date
Joseph Myers 04277e02d7 Update copyright dates with scripts/update-copyrights. 
* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.
 2019-01-01 00:11:28 +00:00
Joseph Myers 688903eb3e Update copyright dates with scripts/update-copyrights. 
* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.
 2018-01-01 00:32:25 +00:00
Joseph Myers bfff8b1bec Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Joseph Myers f7a9f785e5 Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Stefan Liebler 890b7a4b33 S390: Fix "backtrace() returns infinitely deep stack frames with makecontext()" [BZ #18508]. 
On s390/s390x backtrace(buffer, size) returns the series of called functions until
"makecontext_ret" and additional entries (up to "size") with "makecontext_ret".
GDB-backtrace is also warning:
"Backtrace stopped: previous frame identical to this frame (corrupt stack?)"

To reproduce this scenario you have to setup a new context with makecontext()
and activate it with setcontext(). See e.g. cf() function in testcase stdlib/tst-makecontext.c.
Or see bug in libgo "Bug 66303 - runtime.Caller() returns infinitely deep stack frames
on s390x " (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66303).

This patch omits the cfi_startproc/cfi_endproc directives in ENTRY/END macro of
__makecontext_ret. Thus no frame information is generated in .eh_frame and backtrace
stops after __makecontext_ret. There is also no .eh_frame info for _start or
thread_start functions.

ChangeLog:

	[BZ #18508]
	* stdlib/Makefile ($(objpfx)tst-makecontext3):
	Depend on $(libdl).
	* stdlib/tst-makecontext.c (cf): Test if _Unwind_Backtrace
	is not called infinitely times.
	(backtrace_helper): New function.
	(trace_arg): New struct.
	(st1): Enlarge stack size.
	* sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:
	(__makecontext_ret): Omit cfi_startproc and cfi_endproc.
	* sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S:
	Likewise.
 2015-07-07 16:11:14 +02:00
Joseph Myers b168057aaa Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Allan McRae d4697bc93d Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
Joseph Myers 568035b787 Update copyright notices with scripts/update-copyrights. 2013-01-02 19:05:09 +00:00
Thomas Schwinge dc97c227c9 setcontext: Clarify termination when uc_link is the null pointer. 2012-07-17 10:05:55 +02:00
Paul Eggert 59ba27a63a Replace FSF snail mail address with URLs. 2012-02-09 23:18:22 +00:00
Jakub Jelinek 117df5d9ef * stdlib/tst-makecontext.c (othervar): New variable. 
(cf): Test sign extending the argument to long.
2008-04-10  Jakub Jelinek  <jakub@redhat.com>

	* stdlib/tst-makecontext.c (othervar): New variable.
	(cf): Test sign extending the argument to long.
 2008-04-10 08:26:41 +00:00
Ulrich Drepper 3b32d8a259 * sysdeps/powerpc/powerpc32/power5/fpu/s_isnan.S: New file. 
* sysdeps/powerpc/powerpc32/power5/fpu/s_isnanf.S: New file.
	* sysdeps/powerpc/powerpc32/power6/fpu/s_isnan.S: New file.
	* sysdeps/powerpc/powerpc32/power6/fpu/s_isnanf.S: New file.
	* sysdeps/powerpc/powerpc64/power5/fpu/s_isnan.S: New file.
	* sysdeps/powerpc/powerpc64/power6/fpu/s_isnan.S: New file.
	* sysdeps/powerpc/powerpc64/power6x/fpu/s_isnan.S: New file.
 2008-04-10 05:59:13 +00:00
Ulrich Drepper 6c30d38fdd [BZ #5436] 
2008-04-09  Ulrich Drepper  <drepper@redhat.com>
	* stdlib/tst-makecontext.c: Change parameter to cf to negative
	value to check for correct sign extension.

	[BZ #5436]
	* sysdeps/unix/sysv/linux/x86_64/makecontext.c (__makecontext):
	Copy 64-bit parameter values even though this is not required in
	the standard.

	* sysdeps/unix/sysv/linux/x86_64/vfork.S (__vfork): Record return
	PC save.
 2008-04-09 18:30:12 +00:00
Ulrich Drepper d6220e9ee3 Include errno.h. Change main() to do_test(). Define TEST_FUNCTION. Include test-skeleton.c. (do_test): Check errno and exit(0) if ENOSYS. 2007-01-11 21:51:00 +00:00
Ulrich Drepper a12dcecc50 * stdlib/Makefile (tests): Add tst-makecontext. 
* stdlib/tst-makecontext.c: New test.

	* sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S
	(__makecontext): Don't realign uc_mcontext.uc_regs.
 2006-12-19 15:34:16 +00:00
Ulrich Drepper a334319f65 (CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4. 2004-12-22 20:10:10 +00:00
Jakub Jelinek 0ecb606cb6 2.5-18.1 2007-07-12 18:26:36 +00:00