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From: Peter Dimov (pdimov_at_[hidden])
Date: 2006-03-22 17:52:06

Peter Dimov wrote:
> John Maddock wrote:
>> Program received signal SIGSEGV, Segmentation fault
>> si_code: 1 - SEGV_MAPERR - Address not mapped to object.
>> 0x40601e1 in boost::detail::atomic_decrement (pw=0x40014bd4)
>> at sp_counted_base_gcc_ia64.hpp:52
> The problem is that in
> __asm__ (" fetchadd4.rel %0=[%2],-1 ;; \n"
> the %2 register (r15 in my test) contains 0x40014bd4, while the
> address of *pw is actually 0x2000000040014bd4. Apparently g++ needs
> to be informed of the fact that %2 is an address register, not a data
> register. Now I only need to find out how to do that.

I fixed it. shared_ptr_test with -O0 -g still segfaults on td176, but this
has nothing to do with the inline asm, as the same fault occurs
with -DBOOST_SP_DISABLE_THREADS. shared_ptr_test -O2 works fine, as does
smart_ptr_test. I tested the fix on the other IA64 testdrives as well, all
seem to work. Committed to trunk.

OK to commit to branch?

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