Add the ability for an SBValue to create a persisted version of itself.

Such a persisted version is equivalent to evaluating the value via the expression evaluator, and holding on to the $n result of the expression, except this API can be used on SBValues that do not obviously come from an expression (e.g. are the result of a memory lookup)

Expose this via SBValue::Persist() in our public API layer, and ValueObject::Persist() in the lldb_private layer

Includes testcase

Fixes rdar://19136664

llvm-svn: 223711

1 files changed, 11 insertions, 0 deletions

diff --git a/lldb/source/Expression/ClangExpressionVariable.cpp b/lldb/source/Expression/ClangExpressionVariable.cpp
index c3eae41473e..e86016e53a7 100644
--- a/lldb/source/Expression/ClangExpressionVariable.cpp
+++ b/lldb/source/Expression/ClangExpressionVariable.cpp
@@ -28,6 +28,17 @@ ClangExpressionVariable::ClangExpressionVariable(ExecutionContextScope *exe_scop
 {
 }
 
+ClangExpressionVariable::ClangExpressionVariable (ExecutionContextScope *exe_scope,
+                                                  Value &value,
+                                                  const ConstString &name,
+                                                  uint16_t flags) :
+    m_parser_vars(),
+    m_jit_vars (),
+    m_flags (flags),
+    m_frozen_sp (ValueObjectConstResult::Create (exe_scope, value, name))
+{
+}
+
 ClangExpressionVariable::ClangExpressionVariable (const lldb::ValueObjectSP &valobj_sp) :
     m_parser_vars(),
     m_jit_vars (),