From: "Metzger, Markus T" <markus.t.metzger@intel.com>
To: "Willgerodt, Felix" <felix.willgerodt@intel.com>
Cc: "gdb-patches@sourceware.org" <gdb-patches@sourceware.org>
Subject: RE: [PATCH v3 04/12] btrace: Handle stepping and goto for auxiliary instructions.
Date: Thu, 12 Aug 2021 11:07:11 +0000 [thread overview]
Message-ID: <DM8PR11MB5749972E1A0C1D5148597AB5DEF99@DM8PR11MB5749.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20210616074205.1129553-5-felix.willgerodt@intel.com>
Thanks, Felix,
The patch looks good with one issue.
>@@ -2400,12 +2405,25 @@ record_btrace_single_step_forward (struct
>thread_info *tp)
> of the execution history. */
> steps = btrace_insn_next (replay, 1);
> if (steps == 0)
>+ {
>+ *replay = start;
>+ return btrace_step_no_history ();
>+ }
>+
>+ const struct btrace_insn *insn = btrace_insn_get (replay);
>+
>+ /* If we're stepping a BTRACE_INSN_AUX instruction, print the auxiliary
>+ data and skip the instruction. */
>+ if (insn->iclass == BTRACE_INSN_AUX)
We need to check for nullptr. Btrace_insn_get() return nullptr in case of trace errors, where we add a gap to the trace.
> {
>- *replay = start;
>- return btrace_step_no_history ();
>+ printf_unfiltered ("[%s]\n",
>+ btinfo->aux_data[insn->aux_data_index].c_str ());
>+ continue;
> }
>+
>+ if (insn != NULL)
>+ break;
Here you add the check. Note that NULL is spelled nullptr nowadays.
Regards,
Markus.
Intel Deutschland GmbH
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next prev parent reply other threads:[~2021-08-12 11:07 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-16 7:41 [PATCH v3 00/12] Extensions for PTWRITE Felix Willgerodt
2021-06-16 7:41 ` [PATCH v3 01/12] btrace: Introduce auxiliary instructions Felix Willgerodt
2021-08-12 11:06 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2021-06-16 7:41 ` [PATCH v3 02/12] btrace: Enable auxiliary instructions in record instruction-history Felix Willgerodt
2021-08-12 11:06 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2021-06-16 7:41 ` [PATCH v3 03/12] btrace: Enable auxiliary instructions in record function-call-history Felix Willgerodt
2021-08-12 11:14 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2021-06-16 7:41 ` [PATCH v3 04/12] btrace: Handle stepping and goto for auxiliary instructions Felix Willgerodt
2021-08-12 11:07 ` Metzger, Markus T [this message]
2022-05-06 11:26 ` Willgerodt, Felix
2021-06-16 7:41 ` [PATCH v3 05/12] python: Introduce gdb.RecordAuxiliary class Felix Willgerodt
2021-08-12 11:07 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2021-06-16 7:41 ` [PATCH v3 06/12] python: Add clear() to gdb.Record Felix Willgerodt
2021-08-12 11:07 ` Metzger, Markus T
2021-06-16 7:42 ` [PATCH v3 07/12] btrace, gdbserver: Add ptwrite to btrace_config_pt Felix Willgerodt
2021-08-12 11:07 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2022-05-10 13:59 ` Metzger, Markus T
2022-06-24 6:57 ` Willgerodt, Felix
2021-06-16 7:42 ` [PATCH v3 08/12] btrace, linux: Enable ptwrite packets Felix Willgerodt
2021-08-12 11:07 ` Metzger, Markus T
2021-06-16 7:42 ` [PATCH v3 09/12] btrace, python: Enable ptwrite listener registration Felix Willgerodt
2021-08-13 10:36 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2022-05-30 14:55 ` Metzger, Markus T
2022-05-31 11:26 ` Willgerodt, Felix
2022-05-31 11:50 ` Eli Zaretskii
2021-06-16 7:42 ` [PATCH v3 10/12] btrace, python: Enable calling the ptwrite listener Felix Willgerodt
2021-08-13 10:36 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2022-05-30 15:01 ` Metzger, Markus T
2021-06-16 7:42 ` [PATCH v3 11/12] gdb, testsuite, lib: Add libipt version check Felix Willgerodt
2021-08-13 10:36 ` Metzger, Markus T
2022-05-02 9:55 ` Willgerodt, Felix
2021-06-16 7:42 ` [PATCH v3 12/12] btrace: Extend ptwrite event decoding Felix Willgerodt
2021-06-17 7:00 ` Eli Zaretskii
2021-06-17 11:51 ` Willgerodt, Felix
2021-08-13 13:36 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
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