rdar://problem/11320188

Designate MachThreadList as a transaction coordinator when doing Enable/DisableHardwareWatchpoint on the list of threads.
In case the operation (iterating on the threads and doing enable/disable) fails in the middle, we rollback the already
enabled/disabled threads to their checkpointed states.  When all the threads succeed in enable/disable, we ask each thread
to finsih the transaction and commit the change of the debug state.

llvm-svn: 157858

1 files changed, 12 insertions, 0 deletions

diff --git a/lldb/tools/debugserver/source/MacOSX/MachThread.cpp b/lldb/tools/debugserver/source/MacOSX/MachThread.cpp
index aca47f9120f..f9e3dd569f6 100644
--- a/lldb/tools/debugserver/source/MacOSX/MachThread.cpp
+++ b/lldb/tools/debugserver/source/MacOSX/MachThread.cpp
@@ -700,6 +700,18 @@ MachThread::HardwareWatchpointStateChanged ()
 }
 
 bool
+MachThread::RollbackTransForHWP()
+{
+    return m_arch_ap->RollbackTransForHWP();
+}
+
+bool
+MachThread::FinishTransForHWP()
+{
+    return m_arch_ap->FinishTransForHWP();
+}
+
+bool
 MachThread::DisableHardwareBreakpoint (const DNBBreakpoint *bp)
 {
     if (bp != NULL && bp->IsHardware())