Bug#570889: #570889 ant: FTBFS on kfreebsd-* and hppa: Bus error

Petr Salinger Petr.Salinger at seznam.cz
Fri Feb 26 00:22:27 UTC 2010


> On Thu, Feb 25, 2010 at 9:23 AM, Petr Salinger <Petr.Salinger at seznam.cz> wrote:
>> The file, which have to be copied, have size 1701,
>> but two pages (2*4096) are mmaped. It is allowed on both
>> Linux and FreeBSD.
>> When the 2nd page of that file would be accessed, it would
>> generate SIGBUS.
>>
>> The question is of course whether it really happens and why ?

> File descriptor 0 is standard input and you can't mmap that.
> You should also check the return of mmap.
> Could you please provide a new test case?

Please really try to run the example code,
for me (pagesize 4096) it gives:

0x800636000 32
0x800636000 0
Bus error

The example code just illustrates what might happen in
failure of ant. The affected architectures directly in
ant build have been only kfreebsd-* and hppa.

Now it looks like wider problem - #571532, #571542, #571397.

Petr






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