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| author | Josh Stone <jistone@redhat.com> | 2009-07-15 18:21:56 -0700 |
|---|---|---|
| committer | Josh Stone <jistone@redhat.com> | 2009-07-15 18:35:48 -0700 |
| commit | 03c75a4a21ef3dba8abbc7e596d2a102427a3d96 (patch) | |
| tree | 82e48a6a13454b9d0967b6d7e029aaf137ae47b9 /tapset-utrace.cxx | |
| parent | af4d5a48f2b0fed8b5a1bddda9bd1ffa81e7bd46 (diff) | |
| download | systemtap-steved-03c75a4a21ef3dba8abbc7e596d2a102427a3d96.tar.gz systemtap-steved-03c75a4a21ef3dba8abbc7e596d2a102427a3d96.tar.xz systemtap-steved-03c75a4a21ef3dba8abbc7e596d2a102427a3d96.zip | |
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 $vars w/o addresses
* testsuite/systemtap.base/cast.stp: add &@cast test
* testsuite/semok/target_addr.stp: test '&' on different member types
* testsuite/semko/target_addr?.stp: test failure on bitfields/registers
Diffstat (limited to 'tapset-utrace.cxx')
| -rw-r--r-- | tapset-utrace.cxx | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tapset-utrace.cxx b/tapset-utrace.cxx index 64f546e6..ec20282a 100644 --- a/tapset-utrace.cxx +++ b/tapset-utrace.cxx @@ -539,6 +539,9 @@ utrace_var_expanding_visitor::visit_target_symbol (target_symbol* e) throw semantic_error ("only \"process(PATH_OR_PID).syscall\" and \"process(PATH_OR_PID).syscall.return\" probes support target symbols", e->tok); + if (e->addressof) + throw semantic_error("cannot take address of utrace variable", e->tok); + if (e->base_name.substr(0,4) == "$arg") visit_target_symbol_arg(e); else if (e->base_name == "$syscall" || e->base_name == "$return") |