Thread hardening part 3. Now lldb_private::Thread objects have std::weak_ptr

objects for the backlink to the lldb_private::Process. The issues we were
running into before was someone was holding onto a shared pointer to a 
lldb_private::Thread for too long, and the lldb_private::Process parent object
would get destroyed and the lldb_private::Thread had a "Process &m_process"
member which would just treat whatever memory that used to be a Process as a
valid Process. This was mostly happening for lldb_private::StackFrame objects
that had a member like "Thread &m_thread". So this completes the internal
strong/weak changes.

Documented the ExecutionContext and ExecutionContextRef classes so that our
LLDB developers can understand when and where to use ExecutionContext and 
ExecutionContextRef objects.

llvm-svn: 151009

1 files changed, 1 insertions, 7 deletions

diff --git a/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.h b/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.h
index a37fa91ee2b..1bf688de20a 100644
--- a/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.h
+++ b/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.h
@@ -20,7 +20,7 @@ class ProcessKDP;
 class ThreadKDP : public lldb_private::Thread
 {
 public:
-    ThreadKDP (ProcessKDP &process, 
+    ThreadKDP (const lldb::ProcessSP &process_sp, 
                lldb::tid_t tid);
 
     virtual
@@ -47,12 +47,6 @@ public:
     virtual void
     ClearStackFrames ();
 
-    ProcessKDP &
-    GetKDPProcess ()
-    {
-        return (ProcessKDP &)m_process;
-    }
-
     void
     Dump (lldb_private::Log *log, uint32_t index);