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From: "pedro at palves dot net" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/28621] New: Watchpoint followed by catchpoint misreports
 watchpoint
Date: Tue, 23 Nov 2021 17:36:23 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28621

            Bug ID: 28621
           Summary: Watchpoint followed by catchpoint misreports
                    watchpoint
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: pedro at palves dot net
  Target Milestone: ---

If GDB reports a watchpoint hit, and then the next event is a catchpoint, G=
DB
mistakenly tells the user that the watchpoint triggered.

Vis, using foll-fork.c:

  (gdb) start
  ...
  (gdb) awatch v
  Hardware access (read/write) watchpoint 2: v
  (gdb) catch fork
  Catchpoint 3 (fork)
  (gdb) c
  Continuing.

  Hardware access (read/write) watchpoint 2: v

  Old value =3D 0
  New value =3D 5
  main () at gdb.base/foll-fork.c:16
  16        pid =3D fork ();
  (gdb)
  Continuing.

  Hardware access (read/write) watchpoint 2: v      <<<<
                                                    <<<< these lines are
spurious
  Value =3D 5                                         <<<<

  Catchpoint 3 (forked process 1712369), arch_fork (ctid=3D0x7ffff7fa4810) =
at
arch-fork.h:49
  49      arch-fork.h: No such file or directory.
  (gdb)

--=20
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