linux-kernel - Re: [PATCH] plugin python: Adjust the handling after PyRun

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Date:   Thu, 27 Apr 2017 11:52:14 +0900
From:   Taeung Song <treeze.taeung@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] plugin python: Adjust the handling after PyRun_String()
 failed



On 04/27/2017 11:47 AM, Steven Rostedt wrote:
> On Thu, 27 Apr 2017 08:46:21 +0900
> Taeung Song <treeze.taeung@...il.com> wrote:
>
>> Even though PyRun_String() failed,
>> just 0 will be returned but we need to return -1
>> that means error status, so fix it.
>>
>> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
>> ---
>>  plugin_python.c | 5 +++--
>>  1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/plugin_python.c b/plugin_python.c
>> index 2997679..dcfad0f 100644
>> --- a/plugin_python.c
>> +++ b/plugin_python.c
>> @@ -24,7 +24,7 @@ static int load_plugin(struct pevent *pevent, const char *path,
>>  			const char *name, void *data)
>>  {
>>  	PyObject *globals = data;
>> -	int err;
>> +	int err, ret = 0;
>
> Hmm, we can either reuse err.
>

But return value of asprintf() can be more 1,
when it succeeded.
So I think it is better the below you said.

>>  	int len = strlen(path) + strlen(name) + 2;
>>  	int nlen = strlen(name) + 1;
>>  	char *full = malloc(len);
>> @@ -50,12 +50,13 @@ static int load_plugin(struct pevent *pevent, const char *path,
>>  	if (!res) {
>>  		fprintf(stderr, "failed loading %s\n", full);
>>  		PyErr_Print();
>> +		ret = -1;
>>  	} else
>>  		Py_DECREF(res);
>>
>>  	free(load);
>>
>> -	return 0;
>> +	return ret;
>
> or do a: return res ? 0 : -1;
>
> -- Steve
>

Okey! I'll resent the patch after modifying this!


Thanks,
Taeung