[Lldb-commits] [lldb] r243507 - Lock the owners mutex in the BreakpointSite before updating the hit

[Jim Ingham]

Author: jingham
Date: Tue Jul 28 19:40:36 2015
New Revision: 243507

URL: http://llvm.org/viewvc/llvm-project?rev=243507&view=rev
Log:
Lock the owners mutex in the BreakpointSite before updating the hit
counts.  If you delete a breakpoint belonging to a site just as you are
processing a hit on that site, you could cause the BreakpointSite loop to
access a now deleted location.

<rdar://problem/19310323>

Modified:
    lldb/trunk/source/Breakpoint/BreakpointSite.cpp

Modified: lldb/trunk/source/Breakpoint/BreakpointSite.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Breakpoint/BreakpointSite.cpp?rev=243507&r1=243506&r2=243507&view=diff
==============================================================================
--- lldb/trunk/source/Breakpoint/BreakpointSite.cpp (original)
+++ lldb/trunk/source/Breakpoint/BreakpointSite.cpp Tue Jul 28 19:40:36 2015
@@ -205,6 +205,7 @@ BreakpointSite::ValidForThisThread (Thre
 void
 BreakpointSite::BumpHitCounts()
 {
+    Mutex::Locker locker(m_owners_mutex);
     for (BreakpointLocationSP loc_sp : m_owners.BreakpointLocations())
     {
         loc_sp->BumpHitCount();