From: Julian Seward <jseward@acm.org>
Date: Tue, 17 Oct 2006 20:39:11 +0000 (+0000)
Subject: Ensure VG_(tt_fastN) always stays as an array of NULLs if BB profiling
X-Git-Tag: svn/VALGRIND_3_3_0~566
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8bd33fb450de92cf3463ed8dd8236ab76f3943df;p=thirdparty%2Fvalgrind.git

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 8f115a7fa6..551aa2350f 100644
--- 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++;
 }