Date: Sat, 19 Mar 2005 12:26:49 -0800 From: jtc@acorntoolworks.com (J.T. Conklin) To: freebsd-questions@freebsd.org Subject: FreeBSD equivalent for SEGV_MAPERR? Message-ID: <87k6o3756e.fsf@orac.acorntoolworks.com>
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I'm working on autoconf support for ACE (A C++ framework) and TAO
(Real-time CORBA ORB).
The resulting configuration is failing for FreeBSD, something I'd
like before the upcoming ACE/TAO release. I downloaded FreeBSD 5.3
and installed it under vmware to reproduce (and hopefully fix) this
problem.
The configure script detects that FreeBSD supports SA_SIGINFO, the
siginfo_t struct, and the fact siginfo_t has a si_addr field so it
enables code to check for segmentation errors in the shared memory
pool class. But that fails to compile due to the lack of a
SEGV_MAPERR macro. The code in question is:
else if (!(siginfo->si_code == SEGV_MAPERR
&& siginfo->si_addr < (((char *) this->base_addr_) + offset)
&& siginfo->si_addr >= ((char *) this->base_addr_)))
ACE_ERROR_RETURN ((LM_ERROR,
"(%P|%t) address %u out of range\n",
siginfo->si_addr),
-1);
I wrote a little test program to force a SIGSEGV, and si_addr seems to
have the correct value. But I don't know what macro/constant I should
be checking si_code against.
--jtc
--
J.T. Conklin
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