Re: thread_test.c problems

On 4/4/04 12:33 AM, "joseph speigle"  wrote:

> have you tried adding a volatile keyword to the
> 
> int volatile errno1_set = 0;
> int volatile errno2_set = 0;
> 
> that should stop while-loop optimizing for cases where the variable is
> modified in a scope the compiler would be ignorant of, and precludes compiler
> while-loop optimization.  That would then tell you if it was a while loop
> optimization problem.

That cures the problem on all systems.  What needs to be done to get this
updated in the tip?

> As for me on RH 8.0
> 
> gcc -v
> Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2/specs
> Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
> --infodir=/usr/share/info --enable-shared --enable-threads=posix
> --disable-checking --host=i386-redhat-linux --with-system-zlib
> --enable-__cxa_atexit
> Thread model: posix
> gcc version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)
> 
> sorry, they all run yes/no/no

I don't know what is different, but I've tried it on RH 7.2, RH AS 3.0, and
Mac OS X.  All hang in an infinite loop with the tip version of
thread_test.c, and all work if I add 'volatile' to the definitions of
errno1_set and errno2_set.

There's still the question of which version of the program is giving the
right answers - the 7.4.2 version or the tip version?


RH 7.2:

[wrp@cherry thread]$ gcc -v
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
gcc version 2.96 20000731 (Red Hat Linux 7.2 2.96-112.7.2)


RH AS 3.0:

$ gcc -v
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2.3/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--disable-checking --with-system-zlib --enable-__cxa_atexit
--host=i386-redhat-linux
Thread model: posix
gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-24)


Mac OS X:

% gcc -v
Reading specs from /usr/libexec/gcc/darwin/ppc/3.3/specs
Thread model: posix
gcc version 3.3 20030304 (Apple Computer, Inc. build 1495)



Wes