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Tue, 26 Sep 2023 10:34:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ynddal.dk; s=sig1; t=1695724494; bh=ezwzZ8lsPDmHeJKdePGG761txtOjsM/wC3C259+dRK0=; h=From:To:Subject:Date:Message-Id:MIME-Version:Content-Type; b=Xwuek8NEmK6I2LHEOwTWKjVLdupPAkZuqQNmOs2CjCGsnBcS3Q/WDjleoEAuKjar0 TgGy3R1k0zwf9qir1TMJ6+qJw2Qtazhx9iDW083dE2tEU243la4xfjbQv/jnMNBoyZ +V6asQ6CJ0NVC0ryoQjzIaiAIz3quuYGBT4B9CY0EpuOYJ62HmS53mmL9e/hS/sJbe EJfP85ooeSgahnFdiB9KW/w9E5ySNUQokPh+kuzWsqy49xwAr3bUxOFIIUOGMQQabG 6iab3OklrFM1PPPNiNc7AcTsmXa2GjG+pKq/KGq+ysmTI3daWWUqMzLffRXLlNBhRU e3X8b22xMI8Ag== From: Mads Ynddal To: qemu-devel@nongnu.org Cc: Stefan Hajnoczi , John Snow , Mads Ynddal , Cleber Rosa , Mads Ynddal , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH v5 07/14] simpletrace: define exception and add handling Date: Tue, 26 Sep 2023 12:34:29 +0200 Message-Id: <20230926103436.25700-8-mads@ynddal.dk> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230926103436.25700-1-mads@ynddal.dk> References: <20230926103436.25700-1-mads@ynddal.dk> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Proofpoint-ORIG-GUID: g0F3YBgxJGbaed64WT7pkOwmoZjcpvUs X-Proofpoint-GUID: g0F3YBgxJGbaed64WT7pkOwmoZjcpvUs X-Proofpoint-Virus-Version: =?UTF-8?Q?vendor=3Dfsecure_engine=3D1.1.170-22c6f66c430a71ce266a39bfe25bc?= =?UTF-8?Q?2903e8d5c8f:6.0.425,18.0.816,17.11.62.513.0000000_definitions?= =?UTF-8?Q?=3D2022-01-18=5F01:2022-01-14=5F01,2022-01-18=5F01,2021-12-02?= =?UTF-8?Q?=5F01_signatures=3D0?= X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 spamscore=0 bulkscore=0 clxscore=1030 adultscore=0 mlxlogscore=781 phishscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309260091 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=17.58.23.183; envelope-from=mads@ynddal.dk; helo=mr85p00im-zteg06021501.me.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ynddal.dk) X-ZM-MESSAGEID: 1695724518680100007 From: Mads Ynddal Define `SimpleException` to differentiate our exceptions from generic exceptions (IOError, etc.). Adapted simpletrace to support this and output to stderr. Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Stefan Hajnoczi Signed-off-by: Mads Ynddal --- scripts/simpletrace.py | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) diff --git a/scripts/simpletrace.py b/scripts/simpletrace.py index 8aea0d169b..229b10aa99 100755 --- a/scripts/simpletrace.py +++ b/scripts/simpletrace.py @@ -32,12 +32,15 @@ log_header_fmt =3D '=3DQQQ' rec_header_fmt =3D '=3DQQII' =20 +class SimpleException(Exception): + pass + def read_header(fobj, hfmt): '''Read a trace record header''' hlen =3D struct.calcsize(hfmt) hdr =3D fobj.read(hlen) if len(hdr) !=3D hlen: - raise ValueError('Error reading header. Wrong filetype provided?') + raise SimpleException('Error reading header. Wrong filetype provid= ed?') return struct.unpack(hfmt, hdr) =20 def get_record(event_mapping, event_id_to_name, rechdr, fobj): @@ -49,10 +52,10 @@ def get_record(event_mapping, event_id_to_name, rechdr,= fobj): try: event =3D event_mapping[name] except KeyError as e: - sys.stderr.write(f'{e} event is logged but is not declared ' \ - 'in the trace events file, try using ' \ - 'trace-events-all instead.\n') - sys.exit(1) + raise SimpleException( + f'{e} event is logged but is not declared in the trace eve= nts' + 'file, try using trace-events-all instead.' + ) =20 rec =3D (name, timestamp_ns, pid) for type, name in event.args: @@ -247,8 +250,7 @@ def run(analyzer): *no_header, trace_event_path, trace_file_path =3D sys.argv[1:] assert no_header =3D=3D [] or no_header =3D=3D ['--no-header'], 'I= nvalid no-header argument' except (AssertionError, ValueError): - sys.stderr.write(f'usage: {sys.argv[0]} [--no-header] \n') - sys.exit(1) + raise SimpleException(f'usage: {sys.argv[0]} [--no-header] \n') =20 with open(trace_event_path, 'r') as events_fobj, open(trace_file_path,= 'rb') as log_fobj: process(events_fobj, log_fobj, analyzer, read_header=3Dnot no_head= er) @@ -276,4 +278,8 @@ def catchall(self, event, rec): i +=3D 1 print(' '.join(fields)) =20 - run(Formatter()) + try: + run(Formatter()) + except SimpleException as e: + sys.stderr.write(str(e) + "\n") + sys.exit(1) --=20 2.38.1