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RE: [PATCH] target attributes [4/5] gdbserver target attributes support
> I think what you said is right. Actually, this function is design to
> help the test of TA function.
> That is why I add a build option for it.
Ok, now I got it. This feature is not meant to be used by an user and is
more of an interface to test your previous patches. Thanks for clarification.
> And I sent a discussion about this in the gdb maillist. Wish you can
> give me more help about this. :)
I`m afraid I cannot help you there much. I still have dim knowledge about debuggers
and gdb, but it is improving ;-)
-Sanimir
>
> Thanks,
> Hui
>
> On Tue, Feb 19, 2013 at 10:54 PM, Agovic, Sanimir
> <sanimir.agovic@intel.com> wrote:
> > Hello Hui,
> >
> > this feature seems to be a superset of GDBs "ignore" command. You may consider to
> > refactor the command (based on your patch series) to evaluate ignore counts on the
> > target similar to target breakpoint condition see: "help show breakpoint condition-
> evaluation".
> >
> > This:
> >> (gdb) condition 1 ($break_count_val == 10)
> > would turn into:
> >> (gdb) ignore 1 10
> >
> > -Sanimir
> >
> >> -----Original Message-----
> >> From: gdb-patches-owner@sourceware.org [mailto:gdb-patches-owner@sourceware.org] On
> Behalf
> >> Of Hui Zhu
> >> Sent: Wednesday, August 29, 2012 10:12 AM
> >> To: gdb-patches@sourceware.org
> >> Cc: Stan Shebs
> >> Subject: [PATCH] target attributes [4/5] gdbserver target attributes support
> >>
> >> This patch add target attributes $break_count_on, $break_count_select and
> >> $break_count_val.
> >> They make gdbserver support a function that count how many times the breakpoint is
> passed.
> >>
> >> $break_count_on is the switch of the breakpoint count function.
> >> The default value of it is 0, the breakpoint count function is closed.
> >> The default value of it is 1, function is opened and when inferior stop and continue
> >> again. The count value of all the breakpoints will reset to 0.
> >> If it is set to 2, function is opened and the count value will not be reset.
> >>
> >> When count function is opened. You can set the address of breakpoint to
> >> $break_count_select to select which count value you want to access in $break_count_val.
> >>
> >> $break_count_val can access to the value of a breakpoint count if you use GDB access
> it.
> >> And you can use it inside the condition of the breakpoint, its value is the value of
> >> current breakpoint count.
> >>
> >> For example:
> >> (gdb) target remote :1234
> >> Remote debugging using :1234
> >> Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.
> >> Loaded symbols for /lib64/ld-linux-x86-64.so.2
> >> 0x00007ffff7ddb6b0 in ?? () from /lib64/ld-linux-x86-64.so.2
> >> (gdb) list
> >> 1 int
> >> 2 main()
> >> 3 {
> >> 4 while (1)
> >> 5 printf("123\n");
> >> 6 }
> >> (gdb) set $break_count_on=1
> >> (gdb) b 5
> >> Breakpoint 1 at 0x4004f8: file w.c, line 5.
> >> (gdb) condition 1 ($break_count_val == 10)
> >> (gdb) c
> >> Continuing.
> >>
> >> Breakpoint 1, main () at w.c:5
> >> 5 printf("123\n");
> >>
> >> In gdbserver part, you can see that:
> >> 123
> >> 123
> >> 123
> >> 123
> >> 123
> >> 123
> >> 123
> >> 123
> >> 123
> >>
> >> And you can use this function to count how many times the a address passed, for
> example:
> >> (gdb) set non-stop on
> >> (gdb) set target-async on
> >> (gdb) target remote :1234
> >> Remote debugging using :1234
> >> [New Thread 9363]
> >> (gdb)
> >> [Thread 9363] #1 stopped.
> >> 0x00007ffff7ddb6b0 in ?? ()
> >> set $break_count_on=2
> >> (gdb) list
> >> 1 int
> >> 2 main()
> >> 3 {
> >> 4 while (1)
> >> 5 printf("123\n");
> >> 6 }
> >> (gdb) b 5
> >> Breakpoint 1 at 0x4004f8: file w.c, line 5.
> >> (gdb) condition 1 ($break_count_val == 0)
> >> (gdb) c&
> >> Continuing.
> >> (gdb) p $break_count_val
> >> $1 = 122472
> >> (gdb) p $break_count_val
> >> $2 = 136000
> >>
> >> PS, I didn't update doc for this function because I am not sure gdb doc want introduce
> >> gdbserver function or not.
> >>
> >>
> >> Thanks,
> >> Hui
> >>
> >> 2012-08-29 Hui Zhu <hui_zhu@mentor.com>
> >>
> >> * config.in (BREAK_COUNT): New macro.
> >> * configure (--enable-break-count): New argument.
> >> * configure.ac (--enable-break-count): New argument.
> >> * inferiors.c (remove_process): Call break_count_list_remove_all.
> >> * linux-low.c (linux_wait_1): Call break_count_increase.
> >> * mem-break.c (break_count_s): New struct.
> >> (raw_breakpoint): Add count.
> >> (break_count_list_create, break_count_list_remove): New function.
> >> (current_break_count): New static variable.
> >> (gdb_condition_true_at_breakpoint): Set current_break_count.
> >> (break_count_list_remove_all): New function.
> >> (break_count_list_reset_s): New struct.
> >> (break_count_list_reset_1, break_count_list_reset,
> >> break_count_val, break_count_increase, get_target_attribute,
> >> set_target_attribute): New function.
> >> * mem-break.h (break_count_list_remove_all,
> >> break_count_list_reset, break_count_val, break_count_increase,
> >> get_target_attribute, set_target_attribute): New function.
> >> * server.c (start_inferior): Call break_count_list_reset.
> >> (handle_general_set): Call set_target_attribute.
> >> (handle_qxfer_target_attributes): New function.
> >> (qxfer_packets): Add "target-attributes".
> >> (handle_query): Add ";qXfer:target-attributes:read+".
> >> (handle_query): Call get_target_attribute.
> >> (handle_v_cont): Call break_count_list_reset.
> >> (myresume): Ditto.
> >> (process_serial_event): Ditto.
> >> (handle_target_event): Ditto.
> >> * server.h (break_count_s): New struct.
> >> (process_info): Add break_count_on, break_count_list
> >> and break_count_select.
> >> * tracepoint.c (get_trace_state_variable_value): Call
> >> break_count_val.
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> >
Intel GmbH
Dornacher Strasse 1
85622 Feldkirchen/Muenchen, Deutschland
Sitz der Gesellschaft: Feldkirchen bei Muenchen
Geschaeftsfuehrer: Christian Lamprechter, Hannes Schwaderer, Douglas Lusk
Registergericht: Muenchen HRB 47456
Ust.-IdNr./VAT Registration No.: DE129385895
Citibank Frankfurt a.M. (BLZ 502 109 00) 600119052