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Re: data and bss tests in dll_list::alloc
On Wed, Feb 08, 2012 at 04:41:52PM +0100, Corinna Vinschen wrote:
>On Feb 8 10:21, Christopher Faylor wrote:
>> On Wed, Feb 08, 2012 at 03:54:19PM +0100, Corinna Vinschen wrote:
>> >I just fixed a typo in the fabort calls in dll_list::alloc. But in
>> >fact I'm wondering if we really need the extensive data_start/data_end/
>> >bss_start/bss_end tests. The reason is simple. All DLL segments are
>> >always loaded into adjacent addresses, always in the order given by the
>> >DLL segement information.
>>
>> If that is the case can we simplify the child_copy operation? That
>> would speed up fork slightly.
>
>I'm not sure, but if you're asking if we can only give a single address
>to child_copy, then the answer is probably no. You can't rely on the
>fact that data and bss segments are adjacent segments in the DLL, just
>that adjacent segments in the DLL will be loaded into adjacent addresses
>in the processes VM.
I thought you were implying that data/bss load order was always the same.
It is isn't it?
cgf