PR10228: use task_finder_vma for -d /user/object files.

* main.cxx (main): For "-d /path" arguments, enable task finder.
* runtime/sym.h (_stp_module): Add *vmcb member.
* task_finder{.cxx,.h} (emit_vma_callback_probe_decl): Zap.
* tapset-itrace.cxx, tapset-utrace.cxx: Use unwindsyms_modules
  instead.
* tapsets.cxx (uprobe::emit_module_decls): Ditto.
* translate.cxx (emit_module_init): Emit task finder registrations
  for vmcb's associated with _stp_modules.
  (dump_unwindsyms): Associate vmcbs with user-space unwindsyms entries.

1 files changed, 4 insertions, 31 deletions

diff --git a/tapset-itrace.cxx b/tapset-itrace.cxx
index 87845155..57c20539 100644
--- a/tapset-itrace.cxx
+++ b/tapset-itrace.cxx
@@ -111,7 +111,10 @@ struct itrace_builder: public derived_probe_builder
 
     // If we have a path, we need to validate it.
     if (has_path)
-      path = find_executable (path);
+      {
+        path = find_executable (path);
+        sess.unwindsym_modules.insert (path);
+      }
 
     finished_results.push_back(new itrace_derived_probe(sess, base, location,
 							has_path, path, pid,
@@ -214,25 +217,6 @@ itrace_derived_probe_group::emit_module_decls (systemtap_session& s)
   s.op->newline(-1) << "return rc;";
   s.op->newline(-1) << "}";
 
-  // Emit vma callbacks.
-  s.op->newline() << "#ifdef STP_NEED_VMA_TRACKER";
-  s.op->newline() << "static struct stap_task_finder_target stap_itrace_vmcbs[] = {";
-  s.op->indent(1);
-  if (! probes_by_path.empty())
-    {
-      for (p_b_path_iterator it = probes_by_path.begin();
-           it != probes_by_path.end(); it++)
-        emit_vma_callback_probe_decl (s, it->first, (int64_t)0);
-    }
-  if (! probes_by_pid.empty())
-    {
-      for (p_b_pid_iterator it = probes_by_pid.begin();
-           it != probes_by_pid.end(); it++)
-        emit_vma_callback_probe_decl (s, "", it->first);
-    }
-  s.op->newline(-1) << "};";
-  s.op->newline() << "#endif";
-
   s.op->newline() << "static struct stap_itrace_probe stap_itrace_probes[] = {";
   s.op->indent(1);
 
@@ -274,17 +258,6 @@ itrace_derived_probe_group::emit_module_init (systemtap_session& s)
     return;
 
   s.op->newline();
-  s.op->newline() << "#ifdef STP_NEED_VMA_TRACKER";
-  s.op->newline() << "_stp_sym_init();";
-  s.op->newline() << "/* ---- itrace vma callbacks ---- */";
-  s.op->newline() << "for (i=0; i<ARRAY_SIZE(stap_itrace_vmcbs); i++) {";
-  s.op->indent(1);
-  s.op->newline() << "struct stap_task_finder_target *r = &stap_itrace_vmcbs[i];";
-  s.op->newline() << "rc = stap_register_task_finder_target(r);";
-  s.op->newline(-1) << "}";
-  s.op->newline() << "#endif";
-
-  s.op->newline();
   s.op->newline() << "/* ---- itrace probes ---- */";
 
   s.op->newline() << "for (i=0; i<" << num_probes << "; i++) {";