[valgrind] [Bug 405377] Handle new Linux kernel feature: Restartable Sequences ("rseq")
https://bugs.kde.org/show_bug.cgi?id=405377 Tom Hughes changed: What|Removed |Added CC||m...@linux.ibm.com --- Comment #6 from Tom Hughes --- *** Bug 449199 has been marked as a duplicate of this bug. *** -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 405377] Handle new Linux kernel feature: Restartable Sequences ("rseq")
https://bugs.kde.org/show_bug.cgi?id=405377 --- Comment #5 from Mark Wielaard --- For now I pushed the ENOSYS patch to make sure things just work with the new glibc. commit 1024237358f01009fe233cb1294f3b8211304eaa Author: Mark Wielaard Date: Fri Dec 10 17:41:59 2021 +0100 Implement linux rseq syscall as ENOSYS This implements rseq for amd64, arm, arm64, ppc32, ppc64, s390x and x86 linux as ENOSYS (without warning). glibc will start using rseq to accelerate sched_getcpu, if available. This would cause a warning from valgrind every time a new thread is started. Real rseq (restartable sequences) support is pretty hard, so for now just explicitly return ENOSYS (just like we do for clone3). https://sourceware.org/pipermail/libc-alpha/2021-December/133656.html Leaving this bug open for a real implementation. -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 405377] Handle new Linux kernel feature: Restartable Sequences ("rseq")
https://bugs.kde.org/show_bug.cgi?id=405377 --- Comment #4 from Derek Bruening --- Updated link for the stale wiki page from the first comment above detailing the run-twice solution DynamoRIO has been using successfully for years now: https://dynamorio.org/page_rseq.html -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 405377] Handle new Linux kernel feature: Restartable Sequences ("rseq")
https://bugs.kde.org/show_bug.cgi?id=405377 --- Comment #3 from Mark Wielaard --- Created attachment 144436 --> https://bugs.kde.org/attachment.cgi?id=144436=edit implement rseq as ENOSYS -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 405377] Handle new Linux kernel feature: Restartable Sequences ("rseq")
https://bugs.kde.org/show_bug.cgi?id=405377 Mark Wielaard changed: What|Removed |Added CC||m...@klomp.org Status|REPORTED|CONFIRMED Ever confirmed|0 |1 --- Comment #2 from Mark Wielaard --- glibc will start using rseq: https://sourceware.org/pipermail/libc-alpha/2021-December/133656.html If they get an ENOSYS they will simply not use it. So I propose that for now we "implement" rseq by just returning ENOSYS and not produce an warning for now. -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 405377] Handle new Linux kernel feature: Restartable Sequences ("rseq")
https://bugs.kde.org/show_bug.cgi?id=405377 --- Comment #1 from Derek Bruening --- Details on DynamoRIO's "run twice" solution and implementation for the rseq feature which is now generally available in recent kernels are at https://github.com/DynamoRIO/dynamorio/wiki/Restartable-Sequences -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 405377] Handle new Linux kernel feature: Restartable Sequences ("rseq")
https://bugs.kde.org/show_bug.cgi?id=405377 Hendrik Greving changed: What|Removed |Added CC||hgrev...@google.com -- You are receiving this mail because: You are watching all bug changes.
