Ensure VG_(tt_fastN) always stays as an array of NULLs if BB profiling

isn't in effect.  This should cause the dispatcher to segfault if it
should ever inadvertantly end up running the profiled dispatch loop
when it shouldn't.  [The alternative is to run slowly for no apparent
reason.]

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6310

diff --git a/coregrind/m_transtab.c b/coregrind/m_transtab.c
index 8f115a7fa6ce34514ae12cbce8a536fbf5cd223a..551aa2350fd6f281741cb2dba82fb040577482dc 100644 (file)
--- a/coregrind/m_transtab.c
+++ b/coregrind/m_transtab.c
@@ -613,7 +613,7 @@ static void setFastCacheEntry ( Addr64 key, ULong* tce, UInt* count )
 {
    UInt cno = (UInt)VG_TT_FAST_HASH(key);
    VG_(tt_fast)[cno]  = tce;
-   VG_(tt_fastN)[cno] = count;
+   VG_(tt_fastN)[cno] = VG_(clo_profile_flags) > 0  ? count  : NULL;
    n_fast_updates++;
 }