Fixed a bug where persistent variables did not

live as long as they needed to.  This led to
equality tests involving persistent variables
often failing or succeeding when they had no
business doing so.

To do this, I introduced the ability for a
memory allocation to "leak" - that is, to
persist in the process beyond the lifetime of
the expression.  Hand-declared persistent
variables do this now.

<rdar://problem/13956311>

llvm-svn: 182528

lldb/source/Expression/IRMemoryMap.cpp

@@ -38,7 +38,10 @@ IRMemoryMap::~IRMemoryMap ()
         while ((iter = m_allocations.begin()) != m_allocations.end())
         {
             err.Clear();
-            Free(iter->first, err);
+            if (iter->second.m_leak)
+                m_allocations.erase(iter);
+            else
+                Free(iter->first, err);
         }
     }
 }
@@ -368,6 +371,25 @@ IRMemoryMap::Malloc (size_t size, uint8_t alignment, uint32_t permissions, Alloc
     return aligned_address;
 }
 
+void
+IRMemoryMap::Leak (lldb::addr_t process_address, Error &error)
+{
+    error.Clear();
+    
+    AllocationMap::iterator iter = m_allocations.find(process_address);
+    
+    if (iter == m_allocations.end())
+    {
+        error.SetErrorToGenericError();
+        error.SetErrorString("Couldn't leak: allocation doesn't exist");
+        return;
+    }
+    
+    Allocation &allocation = iter->second;
+
+    allocation.m_leak = true;
+}
+
 void
 IRMemoryMap::Free (lldb::addr_t process_address, Error &error)
 {