On Thu, Nov 19, 2020 at 2:38 PM Frank Ch. Eigler <f...@redhat.com> wrote: > > Hi - > > > > Maybe add a comment? (no need to repost if you agree): > > > > > > # Workaround to avoid dtrace(1) produces file with 'hidden' > > > # symbol visibility, define STAP_SDT_V2 to produce 'default' > > > # symbol visibility instead. > > > > > > > + QEMU_CFLAGS="$QEMU_CFLAGS -DSTAP_SDT_V2" > > Please note that we don't know how long this behavior will persist. > You are relying on an accident. :-) > > Much of the systemtap code doesn't support real STAP_SDT_V2 format, > and /usr/include/sys/sdt.h cannot generate it at all. That macro > tricks only the dtrace-header-generator to suppress the "hidden" > visibility attribute, but doesn't change probe metadata format to the > old V2 (in .probes sections rather than .note.* ELF notes). > > We'll try not to break it, but please move toward the more proper > per-solib or per-executable hidden copies of the semaphore objects.
Yes, thanks. Gerd Hoffmann has started working on per-solib semaphore linking and this workaround will be replaced by it. Stefan
