[unixODBC-dev] Lots of warnings, and an outright error, in 2.2.14 on 64-bit

Nick Gorham nick at lurcher.org
Tue Feb 17 10:17:51 GMT 2009


Tom Lane wrote:

>Nick Gorham <nick at lurcher.org> writes:
>  
>
>>Tom Lane wrote:
>>    
>>
>>>Note there are several things that look to be outright bugs
>>>independently of platform word width, such as uninitialized variables
>>>and use of "==" where "=" was presumably meant.
>>>      
>>>
>
>  
>
>>Just checking, do you mean in the odbctest code? I can believe missing 
>>the arg change to SQLExtendedFetch, but outright bugs supprise me (maybe 
>>one, but lots of them?)
>>    
>>
>
>DriverManager/SQLCopyDesc.c has a whole lot of "ret == SQLGETDESCFIELD(..."
>that look like they must have been meant as "=" instead.  Maybe that
>only counts as one bug ;-).  There's another case in cur/SQLExtendedFetch.c.
>
>The uninitialized-variable cases I fixed are in
>DriverManager/SQLColAttributesW.c and DriverManager/SQLGetDiagField.c,
>and IIRC would only trigger on zero-length input, so maybe no one has
>stumbled across them up to now.
>
>There are also some error messages that pass an integer value to a %s
>format specifier, which would certainly crash if they'd ever been
>executed.
>
>The bulk of the patch is word-width issues in debugging sprintf's, which
>quite likely wouldn't ever bother users in the field, but they'd sure
>matter if you tried to do debugging on a 64-bit platform.
>
>Every change that I made was in response to a "gcc -Wall" warning.
>If you don't customarily use -Wall or a similar warning level from
>another equally picky compiler, I recommend it.  Zero tolerance for
>warnings has saved my butt a few times.
>
>			regards, tom lane
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>unixODBC-dev at mailman.unixodbc.org
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>  
>
Ok, the 2.2.15pre on the ftp site now has all the warnings Tom found and 
some more I found cleaned up at least up to the Drivers.

-- 
Nick


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