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, 2 insertions, 2 deletions

diff --git a/lldb/source/Target/StackFrameList.cpp b/lldb/source/Target/StackFrameList.cpp
index 27383d87ef7..8d8d13104dc 100644
--- a/lldb/source/Target/StackFrameList.cpp
+++ b/lldb/source/Target/StackFrameList.cpp
@@ -401,14 +401,14 @@ StackFrameList::SetSelectedFrameByIndex (uint32_t idx)
 void
 StackFrameList::SetDefaultFileAndLineToSelectedFrame()
 {
-    if (m_thread.GetID() == m_thread.GetProcess().GetThreadList().GetSelectedThread()->GetID())
+    if (m_thread.GetID() == m_thread.GetProcess()->GetThreadList().GetSelectedThread()->GetID())
     {
         StackFrameSP frame_sp (GetFrameAtIndex (GetSelectedFrameIndex()));
         if (frame_sp)
         {
             SymbolContext sc = frame_sp->GetSymbolContext(eSymbolContextLineEntry);
             if (sc.line_entry.file)
-                m_thread.GetProcess().GetTarget().GetSourceManager().SetDefaultFileAndLine (sc.line_entry.file, 
+                m_thread.CalculateTarget()->GetSourceManager().SetDefaultFileAndLine (sc.line_entry.file, 
                                                                                             sc.line_entry.line);
         }
     }