On Mar 11, 2008, at 4:00 PM, Paul Nasrat wrote:
> I was looking at mod_trace
> (http://prefetch.net/projects/apache_modtrace/index.html
> ) and playing with getting it to compile on OS X.
>
> When building for x86_64 with -arch x86_64 we get bad instructions
> generated:
>
> gcc -o foo -arch x86_64 foo.c
> /var/folders/rV/rV1x2DafFr0R6tGG+1bbk++++TM/-Tmp-//ccnykQ1o.s:11:bad
> register name `%%esi)'
>
>
> Using gcc -S I can definitely see we are not generating correct code:
>
> LCFI1:
> __dtrace_probe$6_foo___probe__noargs:
> nop
> leal 0(%%esi), %%esi
>
> Building with -arch i386 works, DTRACE_PROBE1, etc also seem to work
> on OS X based on the building mod_trace.
>
> I attach a simple reproducer, changing the Makefile to build with -
> arch i386 works. Simply extract onto a Leopard box, cd into the
> extracted dir and run make to see the failure. make foo.s will
> create the generated asm.
>
> $ gcc -v
> Using built-in specs.
> Target: i686-apple-darwin9
> Configured with: /var/tmp/gcc/gcc-5465~16/src/configure --disable-
> checking -enable-werror --prefix=/usr --mandir=/share/man --enable-
> languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg][^.-]*$/
> s/$/-4.0/ --with-gxx-include-dir=/include/c++/4.0.0 --with-slibdir=/
> usr/lib --build=i686-apple-darwin9 --with-arch=apple --with-
> tune=generic --host=i686-apple-darwin9 --target=i686-apple-darwin9
> Thread model: posix
> gcc version 4.0.1 (Apple Inc. build 5465)
> $ dtrace -V
> dtrace: Sun D 1.2.2
Paul,
The DTRACE_PROBE# macros are not supported on OS X. That is why
you're running into issues.
James M
_______________________________________________
dtrace-discuss mailing list
[email protected]
