[erlang-patches] DTrace patch, review draft #1

Scott Lystig Fritchie <>
Wed Nov 9 18:36:58 CET 2011


Mikael Pettersson <> wrote:

mp> If you or Trond believe there is a bug in gcc then _please_ report
mp> it to gcc's bugzilla for proper analysis.  Neither this patch nor
mp> Trond's memcached patch contains enough detail for me to verify the
mp> presence or absence of the alleged bug.

Mikael, I don't know if that bug is already fixed.  If memory serves me
correctly, the bug is in the version of GCC 4.2.1 that I use on Solaris
10.  Assuming that the bug is indeed fixed in a later branch, expecting
Erlang users to correcly update their 64-bit compiler toolchain that is
otherwise not buggy enough to screw up anything else ... seems to me to
be a very high expectation.

Regarding the workaround, some research suggests that using 'asm("")'
instead of 'gcc_optimizer_hack++' might have the same effect.  But I
don't know enough about C compilers to know if it would work with
non-GCC compilers.

-Scott


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