Centralized symbol lookup in IRExecutionUnit, and fixed the code model.

I'm preparing to remove symbol lookup from IRForTarget, where it constitutes a
dreadful hack working around no-longer-existing JIT bugs.  Thanks to our 
contributors, IRForTarget has a lot of smarts that IRExecutionUnit doesn't have,
so I've cleaned them up a bit and moved them over to IRExecutionUnit.

Also for historical reasons, IRExecutionUnit used the "Small" code model on non-
ELF platforms (namely, OS X).  That's no longer necessary, and we can use the
same code model as everyone else on OS X.  I've fixed that.

llvm-svn: 260734

1 files changed, 12 insertions, 0 deletions

diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp
index 01a155a655a..db751269700 100644
--- a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp
@@ -612,11 +612,23 @@ ClangExpressionParser::PrepareForExecution (lldb::addr_t &func_addr,
         if (log)
             log->Printf("Found function %s for %s", function_name.AsCString(), m_expr.FunctionName());
     }
+    
+    SymbolContext sc;
+    
+    if (lldb::StackFrameSP frame_sp = exe_ctx.GetFrameSP())
+    {
+        sc = frame_sp->GetSymbolContext(lldb::eSymbolContextEverything);
+    }
+    else if (lldb::TargetSP target_sp = exe_ctx.GetTargetSP())
+    {
+        sc.target_sp = target_sp;
+    }
 
     execution_unit_sp.reset(new IRExecutionUnit (m_llvm_context, // handed off here
                                                  llvm_module_ap, // handed off here
                                                  function_name,
                                                  exe_ctx.GetTargetSP(),
+                                                 sc,
                                                  m_compiler->getTargetOpts().Features));
 
     ClangExpressionHelper *type_system_helper = dyn_cast<ClangExpressionHelper>(m_expr.GetTypeSystemHelper());