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From: Richard Henderson <rth@redhat.com> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, Subject: Re: libstdc++/4367: Sparc atomicity.h routines can lock up on some OS. Date: Tue, 02 Apr 2002 00:16:00 -0000 [thread overview] Message-ID: <20020402081602.31809.qmail@sources.redhat.com> (raw) The following reply was made to PR libstdc++/4367; it has been noted by GNATS. From: Richard Henderson <rth@redhat.com> To: bkoz@gcc.gnu.org, eric.norum@usask.ca, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org Cc: Subject: Re: libstdc++/4367: Sparc atomicity.h routines can lock up on some OS. Date: Tue, 2 Apr 2002 00:08:05 -0800 On Tue, Apr 02, 2002 at 02:56:22AM -0000, bkoz@gcc.gnu.org wrote: > I guess you'll have to use heavier-weight locks for these OS's. > Can you think of another solution? I cannot. Generally for these targets you turn off interrupts. See the m68k atomicity.h, for instance. > Note this is an issue with all the cpu/atomicity.h files, > not just sparc, right? No, only those cpu's that have to use spinlocks instead of e.g. an atomic-add, compare-and-exchange, or load-locked instruction. Of those listed in config/*, Sparc v7/v8, m68000, MIPS I, and PA are affected. MIPS I is an odd-ball because some operating systems (eg Linux) provide emulation for the MIPS II ll/sc instructions. Currently our atomicity.h file assumes MIPS II. r~
next reply other threads:[~2002-04-02 8:16 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-04-02 0:16 Richard Henderson [this message] -- strict thread matches above, loose matches on Subject: below -- 2002-11-02 1:38 davem 2002-11-01 18:05 bkoz 2002-10-01 22:14 davem 2002-04-02 13:56 Richard Henderson 2002-04-02 7:36 Eric Norum 2002-04-01 18:56 bkoz 2001-09-20 8:26 Phil Edwards 2001-09-20 7:56 eric.norum
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