* Makefile.in (eval.o): Update dependencies.

	* eval.c: Include "ui-out.h" and "exceptions.h".
	(evaluate_subexp_standard): Use TRY_CATCH around value_of_variable.
	Use value_zero if an error occurs when avoiding side effects.
	* varobj.c (c_value_of_root): Initialize new_val.

	* gdb.mi/mi-var-cmd.exp: Add tests for unreadable varobjs.

1 files changed, 22 insertions, 2 deletions

diff --git a/gdb/eval.c b/gdb/eval.c
index 1a3d72a..4954e9f 100644
--- a/gdb/eval.c
+++ b/gdb/eval.c
@@ -37,6 +37,8 @@
 #include "block.h"
 #include "parser-defs.h"
 #include "cp-support.h"
+#include "ui-out.h"
+#include "exceptions.h"
 
 #include "gdb_assert.h"
 
@@ -469,8 +471,26 @@ evaluate_subexp_standard (struct type *expect_type,
 	 value_rtti_target_type () if we are dealing with a pointer
 	 or reference to a base class and print object is on. */
 
-	return value_of_variable (exp->elts[pc + 2].symbol,
-				  exp->elts[pc + 1].block);
+      {
+	volatile struct gdb_exception except;
+	struct value *ret = NULL;
+
+	TRY_CATCH (except, RETURN_MASK_ERROR)
+	  {
+	    ret = value_of_variable (exp->elts[pc + 2].symbol,
+				     exp->elts[pc + 1].block);
+	  }
+
+	if (except.reason < 0)
+	  {
+	    if (noside == EVAL_AVOID_SIDE_EFFECTS)
+	      ret = value_zero (SYMBOL_TYPE (exp->elts[pc + 2].symbol), not_lval);
+	    else
+	      throw_exception (except);
+	  }
+
+	return ret;
+      }
 
     case OP_LAST:
       (*pos) += 2;