On Wed, Jul 05, 2017 at 12:58:51 +0100, Daniel Berrange wrote:
> Currently all mockable functions are annotated with the 'noinline'
> attribute. This is insufficient to guarantee that a function can
> be reliably mocked with an LD_PRELOAD. The C language spec allows
> the compiler to assume there is only a single implementation of
> each function. It can thus do things like propagating constant
> return values into the caller at compile time, or creating
> multiple specialized copies of the function body each optimized
> for a different caller. To prevent these optimizations we must
> also set the 'noclone' and 'weak' attributes.
>
> This fixes the test suite when libvirt.so is built with CLang
> with optimization enabled.
>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This patch makes virtlogd crash:
(gdb) bt
#0 0x0000000000000000 in ?? ()
#1 0x00005555555a8084 in virHashCreateFull (size=size@entry=5, dataFree=0x5555555b0930 <virObjectFreeHashData>, keyCode=keyCode@entry=0x5555555a7c30 <virHashStrCode>, keyEqual=keyEqual@entry=0x5555555a7c10 <virHashStrEqual>, keyCopy=keyCopy@entry=0x5555555a7bb0 <virHashStrCopy>, keyFree=keyFree@entry=0x5555555a7b90 <virHashStrFree>) at util/virhash.c:167
#2 0x00005555555a8151 in virHashCreate (size=size@entry=5, dataFree=<optimized out>) at util/virhash.c:196
#3 0x00005555555779f0 in virNetDaemonNew () at rpc/virnetdaemon.c:137
#4 0x00005555555708ec in virLogDaemonNew (privileged=false, config=0x555555820940) at logging/log_daemon.c:163
#5 main (argc=<optimized out>, argv=0x7fffffffd888) at logging/log_daemon.c:1069
any idea?
> ---
> build-aux/mock-noinline.pl | 2 +-
> src/check-symfile.pl | 2 +-
> src/internal.h | 23 ++++++++++++++++++-----
> src/qemu/qemu_capspriv.h | 2 +-
> src/rpc/virnetsocket.h | 4 ++--
> src/util/vircommand.h | 2 +-
> src/util/vircrypto.h | 2 +-
> src/util/virfile.h | 2 +-
> src/util/virhostcpu.h | 4 ++--
> src/util/virmacaddr.h | 2 +-
> src/util/virnetdev.h | 8 ++++----
> src/util/virnetdevip.h | 2 +-
> src/util/virnetdevopenvswitch.h | 2 +-
> src/util/virnetdevtap.h | 6 +++---
> src/util/virnuma.h | 16 ++++++++--------
> src/util/virrandom.h | 6 +++---
> src/util/virscsi.h | 2 +-
> src/util/virscsivhost.h | 2 +-
> src/util/virtpm.h | 2 +-
> src/util/virutil.h | 10 +++++-----
> src/util/viruuid.h | 2 +-
> 21 files changed, 58 insertions(+), 45 deletions(-)
ACK
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