Don't raise an error for optimized out sub-fields.

  http://sourceware.org/ml/gdb-patches/2013-07/msg00317.html

gdb/ChangeLog

        * value.c (value_fetch_lazy): Mark optimized out values as such
        rather than raising an error.

gdb/testsuite/ChangeLog

        * gdb.dwarf2/pieces-optimized-out.exp: Expect "<optimized out>"
        when printing an optimized out value.  Expect an error when using
        an optimized out value in an expression.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index fd02aa4..33e7c98 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2013-07-30  Andrew Burgess  <aburgess@broadcom.com>
 
+       * value.c (value_fetch_lazy): Mark optimized out values as such
+       rather than raising an error.
+
+2013-07-30  Andrew Burgess  <aburgess@broadcom.com>
+
        * value.c (value_fetch_lazy): Ensure parent value is not lazy
        before checking which bits of the parent, not the child, value are
        valid.

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 666d083..58c2dd7 100644 (file)
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,5 +1,11 @@
 2013-07-30  Andrew Burgess  <aburgess@broadcom.com>
 
+       * gdb.dwarf2/pieces-optimized-out.exp: Expect "<optimized out>"
+       when printing an optimized out value.  Expect an error when using
+       an optimized out value in an expression.
+
+2013-07-30  Andrew Burgess  <aburgess@broadcom.com>
+
        * gdb.dwarf2/pieces-optimized-out.exp: New file.
        * gdb.dwarf2/pieces-optimized-out.c: New file.
        * gdb.dwarf2/pieces-optimized-out.S: New file.

diff --git a/gdb/testsuite/gdb.dwarf2/pieces-optimized-out.exp b/gdb/testsuite/gdb.dwarf2/pieces-optimized-out.exp
index 2e4d028..4effb30 100644 (file)
--- a/gdb/testsuite/gdb.dwarf2/pieces-optimized-out.exp
+++ b/gdb/testsuite/gdb.dwarf2/pieces-optimized-out.exp
@@ -44,6 +44,7 @@ gdb_test "p s" \
     "print s"
 gdb_test "p s.a" " = 5" "print s.a"
 gdb_test "p s.b" " = <optimized out>" "print s.b"
-gdb_test "p s.c" "value has been optimized out" "print s.c"
-gdb_test "p s.d" "value has been optimized out" "print s.d"
+gdb_test "p s.c" " = <optimized out>" "print s.c"
+gdb_test "p s.d" " = <optimized out>" "print s.d"
+gdb_test "p s.d + 1" "value has been optimized out" "print s.d + 1"
 

diff --git a/gdb/value.c b/gdb/value.c
index 8e0f8c4..8d635c7 100644 (file)
--- a/gdb/value.c
+++ b/gdb/value.c
@@ -3439,9 +3439,8 @@ value_fetch_lazy (struct value *val)
       if (!value_bits_valid (parent,
                             TARGET_CHAR_BIT * offset + value_bitpos (val),
                             value_bitsize (val)))
-       error (_("value has been optimized out"));
-
-      if (!unpack_value_bits_as_long (value_type (val),
+       set_value_optimized_out (val, 1);
+      else if (!unpack_value_bits_as_long (value_type (val),
                                      value_contents_for_printing (parent),
                                      offset,
                                      value_bitpos (val),