In article <ztbu-agn8h_zw...@exadelic.gatalith.at>, Thomas Klausner <w...@netbsd.org> wrote: >Hi! > >I just tried in gdb to watch a memory location. > >(gdb) watch *0x78f2d98cd040 >Hardware watchpoint 6: *0x78f2d98cd040 >(gdb) c >Continuing. >Couldn't write debug registers: Operation not permitted. >Command aborted. >(gdb) > >Watching an expression worked >(gdb) watch tws->dirs[0]->name >Watchpoint 5: tws->dirs[0]->name >... >but doesn't work for my use case because > >Watchpoint 5 deleted because the program has left the block in >which its expression is valid. > >and I think the variable is changed outside somehow. > >That's on gdb 15.1, NetBSD 10.99.12/amd64/20240827. > >Is this expected to work? >Is this a PAX issue and I need to disable (some of) it?
Works as root... (gdb) watch x Hardware watchpoint 2: x (gdb) c Continuing. Hardware watchpoint 2: x Old value = 0 New value = 1 main () at sleep.c:11 11 sleep(1); (gdb) c Continuing. Breakpoint 1, main () at sleep.c:10 10 x++; (gdb) c Continuing. Hardware watchpoint 2: x Old value = 1 New value = 2 main () at sleep.c:11 11 sleep(1); (gdb) q A debugging session is active. christos
