public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
* [Bug d/98025] New: [11 Regression][CET] libphobos: dub segfaults when built with gdc 11 @ 2020-11-27 9:20 ibuclaw at gdcproject dot org 2020-11-27 10:53 ` [Bug d/98025] " rguenth at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: ibuclaw at gdcproject dot org @ 2020-11-27 9:20 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98025 Bug ID: 98025 Summary: [11 Regression][CET] libphobos: dub segfaults when built with gdc 11 Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: d Assignee: ibuclaw at gdcproject dot org Reporter: ibuclaw at gdcproject dot org Target Milestone: --- Following on from pr95680, the layout of the Fiber class changes when libphobos is built with -fversion=CET. This breaks user code that implement their own fibers based off core.thread unless they also compile with -fversion=CET as well. So when libphobos is compiled with --enable-cet, this needs to be also recorded in gcc.config to persist in the ABI. Not just as an internal implementation detail. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug d/98025] [11 Regression][CET] libphobos: dub segfaults when built with gdc 11 2020-11-27 9:20 [Bug d/98025] New: [11 Regression][CET] libphobos: dub segfaults when built with gdc 11 ibuclaw at gdcproject dot org @ 2020-11-27 10:53 ` rguenth at gcc dot gnu.org 2020-11-27 20:28 ` cvs-commit at gcc dot gnu.org 2020-11-27 20:34 ` ibuclaw at gdcproject dot org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2020-11-27 10:53 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98025 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target| |x86_64-*-* i?86-*-* Target Milestone|--- |11.0 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug d/98025] [11 Regression][CET] libphobos: dub segfaults when built with gdc 11 2020-11-27 9:20 [Bug d/98025] New: [11 Regression][CET] libphobos: dub segfaults when built with gdc 11 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 2020-11-27 20:34 ` ibuclaw at gdcproject dot org 2 siblings, 0 replies; 4+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2020-11-27 20:28 UTC (permalink / raw) To: gcc-bugs 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. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug d/98025] [11 Regression][CET] libphobos: dub segfaults when built with gdc 11 2020-11-27 9:20 [Bug d/98025] New: [11 Regression][CET] libphobos: dub segfaults when built with gdc 11 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 @ 2020-11-27 20:34 ` ibuclaw at gdcproject dot org 2 siblings, 0 replies; 4+ messages in thread From: ibuclaw at gdcproject dot org @ 2020-11-27 20:34 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98025 Iain Buclaw <ibuclaw at gdcproject dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|UNCONFIRMED |RESOLVED --- Comment #2 from Iain Buclaw <ibuclaw at gdcproject dot org> --- Fixed committed. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-11-27 20:34 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-11-27 9:20 [Bug d/98025] New: [11 Regression][CET] libphobos: dub segfaults when built with gdc 11 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 2020-11-27 20:34 ` ibuclaw at gdcproject dot org
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).