[ clisp-Bugs-1426388 ] rawsock :end vs. size confusion -> wrong buffer size

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Bugs item #1426388, was opened at 2006-02-07 18:50
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Category: modules
Group: segfault
Status: Open
Resolution: None
Priority: 5
Submitted By: Jörg Höhle (hoehle)
Assigned to: Bruno Haible (haible)
Summary: rawsock :end vs. size confusion -> wrong buffer size

Initial Comment:
Unless I'm mistaken:
rawsock.c:parse_buffer_arg: I believe there's confusion
about size and :end

  *size = missingp(STACK_0) ? vector_length(*arg_)
    : posfixnum_to_V(check_posfixnum(STACK_0));
  data = array_displace_check(*arg_,*size,&start);
  { void *start_address =
(void*)(TheSbvector(data)->data + start);
   
handle_fault_range(prot,(aint)start_address,(aint)start_address
+ *size);

:start 1000 :end 1002 should yield I/O size 2, not 1002

Furthermore, :end >(length buf) probably yields
misleading error messages.

Possibly needs the test_vector_limits() abstraction
Maybe that function should be made available for use by
external modules?

Work-around: do not use :start/:end for now.

Regards,
 Jörg Höhle

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