From 03c75a4a21ef3dba8abbc7e596d2a102427a3d96 Mon Sep 17 00:00:00 2001 From: Josh Stone 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 --- tapset-procfs.cxx | 3 +++ 1 file changed, 3 insertions(+) (limited to 'tapset-procfs.cxx') diff --git a/tapset-procfs.cxx b/tapset-procfs.cxx index 0c33857b..a996ee32 100644 --- a/tapset-procfs.cxx +++ b/tapset-procfs.cxx @@ -383,6 +383,9 @@ procfs_var_expanding_visitor::visit_target_symbol (target_symbol* e) else if (! write_probe && ! lvalue) throw semantic_error("procfs $value variable cannot be read in a procfs read probe", e->tok); + if (e->addressof) + throw semantic_error("cannot take address of procfs variable", e->tok); + // Remember that we've seen a target variable. target_symbol_seen = true; -- cgit