Unify no-component assertions on target variables

There are several tapsets that can't deal with component dereferences on
their target variables, and they all check-and-throw in the same way.
This refactors the checks into a target_symbol member.

* staptree.cxx (target_symbol::assert_no_components): New.
* tapsets.cxx (tracepoint_var_expanding_visitor::visit_target_symbol_arg,
  tracepoint_var_expanding_visitor::visit_target_symbol_context): Use
  the new assertion function to check for no components.
* tapset-mark.cxx (mark_var_expanding_visitor::visit_target_symbol_arg,
  mark_var_expanding_visitor::visit_target_symbol_context): Ditto.
* tapset-perfmon.cxx (perfmon_var_expanding_visitor::visit_target_symbol): Ditto.
* tapset-procfs.cxx (procfs_var_expanding_visitor::visit_target_symbol): Ditto.
* tapset-utrace.cxx (utrace_var_expanding_visitor::visit_target_symbol_arg,
  utrace_var_expanding_visitor::visit_target_symbol_context): Ditto.

1 files changed, 1 insertions, 0 deletions

diff --git a/staptree.h b/staptree.h
index 70746f31..9ade2a42 100644
--- a/staptree.h
+++ b/staptree.h
@@ -252,6 +252,7 @@ struct target_symbol: public symbol
   target_symbol(): addressof(false), saved_conversion_error (0) {}
   void print (std::ostream& o) const;
   void visit (visitor* u);
+  void assert_no_components(const std::string& tapset);
 };
 
 std::ostream& operator << (std::ostream& o, const target_symbol::component& c);