Bug 1221877

Summary:	aarch64 read/access watchpoint not triggered with access > 8 bytes, and gdb hangs
Product:	[openSUSE] openSUSE Distribution	Reporter:	Tom de Vries <tdevries>
Component:	Development	Assignee:	Tom de Vries <tdevries>
Status:	NEW ---	QA Contact:	E-mail List <qa-bugs>
Severity:	Normal
Priority:	P5 - None	CC:	ivan.ivanov, kernel-bugs
Version:	Leap 15.4
Target Milestone:	---
Hardware:	Other
OS:	Other
Whiteboard:
Found By:	---	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Tom de Vries 2024-03-22 16:34:21 UTC

This is a bug to track two related upstream PRs, one for gdb and one for the kernel:
- https://sourceware.org/bugzilla/show_bug.cgi?id=31486
  "[gdb/tdep, aarch64] Hang when hitting access watchpoint on M1"
- https://bugzilla.kernel.org/show_bug.cgi?id=218628
  "Aarch64 inexact watchpoint address make SIGTRAP hard to interpret"

Sofar I only managed to reproduce the problem on macbook M1, but it might also occur with new server hardware supporting SVE or the MOPS feature.