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From: Markus Elfring <Markus.Elfring@web.de>
To: Coccinelle <cocci@systeme.lip6.fr>
Subject: Re: [Cocci] Moving exception handling code to the end of a function implementation with SmPL?
Date: Thu, 31 Oct 2019 13:27:39 +0100
Message-ID: <226b4ce7-8284-ed03-a478-98e3e532cb15@web.de> (raw)
In-Reply-To: <708207db-69d7-8962-e507-cd705142d0c4@web.de>

>   Unfortunately, I stumble on the error message “replacement: already tagged token:
>   C code context” then.

It might be that the transformation approach was too generic for
the implementation of the function “megasas_mgmt_ioctl_fw”.
https://elixir.bootlin.com/linux/v5.4-rc5/source/drivers/scsi/megaraid/megaraid_sas_base.c#L8258
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/scsi/megaraid/megaraid_sas_base.c?id=e472c64aa4fa6150c6076fd36d101d667d71c30a#n8258

The following SmPL script variant can generate an usable test result.

@replacement@
expression result;
identifier work;
type t != void;
@@
 t work(...)
 {
 <+...
 if (...)
(
-{
-result = -ENODEV;
 goto
-     out_kfree_ioc
+     e_nodev
 ;
-}
|
 {
 ...
-result = -ENODEV;
 goto
-     out_kfree_ioc
+     e_nodev
 ;
 }
)
 ...+>
 out_kfree_ioc:
 ... when exists
 return result;
+e_nodev:
+result = -ENODEV;
+goto out_kfree_ioc;
 }


Regards,
Markus
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  parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-21 17:45 Markus Elfring
2019-06-27  8:33 ` Markus Elfring
2019-06-27 11:33   ` Julia Lawall
2019-06-27 12:18     ` Markus Elfring
     [not found]       ` <alpine.DEB.2.21.1906271427250.2627@hadrien>
2019-06-27 12:45         ` Markus Elfring
2019-06-27 14:12         ` Markus Elfring
2019-06-27 14:54           ` Julia Lawall
2019-06-27 15:01             ` Markus Elfring
2019-10-31 12:27 ` Markus Elfring [this message]
2019-10-31 12:42   ` Julia Lawall
2019-10-31 13:50     ` Markus Elfring
2019-11-01  9:12   ` [Cocci] Checking the occurrence of trailing spaces in a semantic patch Markus Elfring
2019-11-01  9:38     ` Julia Lawall
2019-11-01  9:56       ` Markus Elfring
2019-11-01 11:50       ` Markus Elfring
2019-11-01 16:03       ` [Cocci] Checking code layout for adding jump targets with SmPL Markus Elfring
2019-11-01 16:12         ` Markus Elfring

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