libtorrent gives invalid argument under OSX

[cp_future@web.de]

Hi there :)

I successfully compiled libtorrent 0.3.5 and rtorrent 0.7.5 under OSX 10.3.9 Unfortunately I get following error after downloading some kilobytes:

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kizna:~/Documents/Torrent Vartan$ rtorrent ubuntu-5.10-preview-live-i386.iso.torrent

Caught exception from libtorrent: "Connection read fd(21,2,7) "MemoryChunk::advise(...) Invalid argument""

---

Restarting rtorrent fails, I'm always getting:

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Caught exception from libtorrent: "MemoryChunk::advise(...) Invalid argument"

---

Only solution: Removing torrent :(

[rakshasa]

I've gotten other reports about this and i wasn't able to obtain the information needed. Debugging this will require using gdb or applying a patch that prints out the interesting parameters. I'll look into writing one asap.

[rakshasa]

Having looked at the debugging information provided by another user, I think it's likely that the compiler is producing bad code. Not entirely sure but a variable that should have been pointing at the memory location for the file data chunk was instead directed at some code. This had the correct value when accessed later to print it out.

[rakshasa]

Ops, mixed up the bug reporters, the debugging information was provided by the reporter of this ticket. ;)

[rakshasa]

What looked like a compiler bug was infact a gdb bug, and thus not related to this error.

The most likely cause seems to be MacOSX's madvise system call failing with what should be valid arguments.

[rakshasa]

Ignore the return value

[rakshasa]

Ok, problem solved.

MacOSX 10.3 has a bug in the handling of madvise, causing it to return an error when it shouldn't. Attached a patch to fix it. Also set "hash_max_tries = 1".

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