Tom Hughes-2 wrote:
>
> galapogos wrote:
>
>> I'm using gcc with -Wall -g -O0 options.
>> I'm building in Mandriva Linux 2008.1 using gcc 4.2.3, and using
>> valgrind-3.3.0-3mdv2008.1.i586.rpm
>> Here are the 1st few output:
>>
>> ==30486== Syscall param ioctl(SG_GET_VERSION_NUM) points to uninitialised
>> byte(s)
>> ==30486== at 0x4100299: ioctl (in /lib/i686/libc-2.7.so)
>> ==30486== by 0x80498A5: main (a_scsi.c:1139)
>> ==30486== Address 0xbe8f4f20 is on thread 1's stack
>
> It's a bug - that ioctl is wrong marked as reading an int from the
> pointer instead of writing an int to it. So it is (wrongly) expecting
> the point you give it to point at initialised memory.
>
>> ==30486== Conditional jump or move depends on uninitialised value(s)
>> ==30486== at 0x804883F: a_identify_device (a_scsi.c:135)
>> ==30486== by 0x80498A5: main (a_scsi.c:1139)
>
> This and the other complaints then follow as the result of the ioctl has
> not been marked as initialised.
>
> I've just committed a fix.
>
> Tom
>
> --
> Tom Hughes ([email protected])
> http://www.compton.nu/
>
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>
Thanks. So it's a bug in valgrind? My distribution's version isn't the
latest one. Does the latest version have a fix? Meanwhile how do I suppress
these errors?
Also, you mention it's a bug concerning ioctl(). What about the other string
functions? Same bug as well?
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