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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/98025] [11 Regression][CET] libphobos: dub segfaults when built with gdc 11
Date: Fri, 27 Nov 2020 20:28:41 +0000 [thread overview]
Message-ID: <bug-98025-4-TvKw73m80o@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-98025-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98025
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Iain Buclaw <ibuclaw@gcc.gnu.org>:
https://gcc.gnu.org/g:5dbab7b3f4d3a8298aeb8ecde1cfbc4b16913d28
commit r11-5506-g5dbab7b3f4d3a8298aeb8ecde1cfbc4b16913d28
Author: Iain Buclaw <ibuclaw@gdcproject.org>
Date: Fri Nov 27 13:15:44 2020 +0100
libphobos: Fix segfault at run-time when using custom Fibers (PR 98025)
When libphobos is configured with --enable-cet, this adds extra fields
to the Fiber class to support the ucontext_t fallback implementation.
These fields get omitted when compiling user code unless they also used
`-fversion=CET' to build their project, which resulted in data being
overwritten from within swapcontext().
On reviewing the ucontext_t definitions, it was found that the shadow
stack fields were missing, and the struct size didn't match up on X32.
This has been fixed in upstream druntime and merged down here.
Reviewed-on: https://github.com/dlang/druntime/pull/3293
libphobos/ChangeLog:
PR d/98025
* Makefile.in: Regenerate.
* configure: Regenerate.
* configure.ac (DCFG_ENABLE_CET): Substitute.
* libdruntime/MERGE: Merge upstream druntime 0fe7974c.
* libdruntime/Makefile.in: Regenerate.
* libdruntime/core/thread.d: Import gcc.config.
(class Fiber): Add ucontext_t fields when GNU_Enable_CET is true.
* libdruntime/gcc/config.d.in (GNU_Enable_CET): Define.
* src/Makefile.in: Regenerate.
* testsuite/Makefile.in: Regenerate.
next prev parent reply other threads:[~2020-11-27 20:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-27 9:20 [Bug d/98025] New: " ibuclaw at gdcproject dot org
2020-11-27 10:53 ` [Bug d/98025] " rguenth at gcc dot gnu.org
2020-11-27 20:28 ` cvs-commit at gcc dot gnu.org [this message]
2020-11-27 20:34 ` ibuclaw at gdcproject dot org
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