[Libguestfs] [PATCH 1/2] valgrind: Use --trace-children=no --child-silent-after-fork=yes

[Richard W.M. Jones]

When we are valgrinding we don't really care about the child
processes, which might be qemu, libvirtd, etc.  So disable tracing
into children (at least, as far as is possible with valgrind, which is
not entirely disabling it, but suppressing it).
---
 m4/guestfs_progs.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/m4/guestfs_progs.m4 b/m4/guestfs_progs.m4
index e876942..070fd6d 100644
--- a/m4/guestfs_progs.m4
+++ b/m4/guestfs_progs.m4
@@ -125,7 +125,7 @@ dnl Check for valgrind
 AC_CHECK_PROG([VALGRIND],[valgrind],[valgrind],[no])
 AS_IF([test "x$VALGRIND" != "xno"],[
     # Substitute the whole valgrind command.
-    VG='$(VALGRIND) --vgdb=no --log-file=$(abs_top_builddir)/tmp/valgrind-%q{T}-%p.log --leak-check=full --error-exitcode=119 --suppressions=$(abs_top_srcdir)/valgrind-suppressions'
+    VG='$(VALGRIND) --vgdb=no --log-file=$(abs_top_builddir)/tmp/valgrind-%q{T}-%p.log --leak-check=full --error-exitcode=119 --suppressions=$(abs_top_srcdir)/valgrind-suppressions --trace-children=no --child-silent-after-fork=yes'
     ],[
     # No valgrind, so substitute VG with something that will break.
     VG=VALGRIND_IS_NOT_INSTALLED
-- 
2.7.4