PR10622 Search for extern $variables in symbol table.

* dwflpp.h (vardie_from_symtable): New method.
* dwflpp.cxx (vardie_from_symtable): New method.
  (literal_stmt_for_local): Use vardie_from_symtable when no location
  attribute and DW_AT_external.
* testsuite/buildok/xtime.stp: New testcase from PR10622.

1 files changed, 7 insertions, 0 deletions

diff --git a/testsuite/buildok/xtime.stp b/testsuite/buildok/xtime.stp
new file mode 100755
index 00000000..e41f9b16
--- /dev/null
+++ b/testsuite/buildok/xtime.stp
@@ -0,0 +1,7 @@
+#! stap -p4
+
+# Test for getting at an external global variable PR10622
+probe kernel.function("do_gettimeofday")
+{
+  printf("xtime.tv_sec:%d\n", $xtime->tv_sec); exit();
+}