On Mar 12, 2008, at 12:27 AM, Paul Nasrat wrote:
>
> On 11 Mar 2008, at 23:19, James McIlree 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)'
>>>
>>
>> The DTRACE_PROBE# macros are not supported on OS X. That is why
>> you're running into issues.
>
> If they're not supported shouldn't I at least get a warning. Any
> pointers to the right way to do things?
>
> I note that the root cause is actually a bad define in
>
> /usr/include/mach/i386/sdt_isa.h:
>
> #ifdef __x86_64__
>
> #define DTRACE_NOPS \
> "nop" "\n\t" \
> "leal 0(%%esi), %%esi" "\n\t"
I thought we had #ifdef'd these so they wouldn't be available without
some hackery,
but I'm not seeing the guards. Yes, you should have gotten a
warning :-).
I filed:
<rdar://problem/5795255> Disallow use of DTRACE_PROBE macros
James M
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