From 03c75a4a21ef3dba8abbc7e596d2a102427a3d96 Mon Sep 17 00:00:00 2001
From: Josh Stone <jistone@redhat.com>
Date: Wed, 15 Jul 2009 18:21:56 -0700
Subject: PR5930: Address-op for $target and @cast members

This allows the '&' operator to get the address of @cast and $target
variable expressions.

* staptree.h (target_symbol): add addressof field
* staptree.cxx (target_symbol::print): print '&' for addressof
  (cast_op::print): ditto
* parse.cxx (parser::parse_value): allow '&' prefix on $target/@cast
* dwflpp.cxx (dwflpp::translate_final_fetch_or_store): allow taking the
  computed address without actually doing a final fetch.
* tapset* (*::visit_target_symbol): throw errors for $vars w/o addresses
* testsuite/systemtap.base/cast.stp: add &@cast test
* testsuite/semok/target_addr.stp: test '&' on different member types
* testsuite/semko/target_addr?.stp: test failure on bitfields/registers
---
 staptree.cxx | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'staptree.cxx')

diff --git a/staptree.cxx b/staptree.cxx
index 8d251731..9e2ca8da 100644
--- a/staptree.cxx
+++ b/staptree.cxx
@@ -261,6 +261,8 @@ void symbol::print (ostream& o) const
 
 void target_symbol::print (std::ostream& o) const
 {
+  if (addressof)
+    o << "&";
   o << base_name;
   for (unsigned i = 0; i < components.size(); ++i)
     {
@@ -279,6 +281,8 @@ void target_symbol::print (std::ostream& o) const
 
 void cast_op::print (std::ostream& o) const
 {
+  if (addressof)
+    o << "&";
   o << base_name << '(' << *operand;
   o << ", " << lex_cast_qstring (type);
   if (module.length() > 0)
-- 
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