PR10000: emit _stp_relocate* calculations correctly for kernel/module global $data

* translate.cxx (dump_unwindsyms): Also emit STT_OBJECT symbols,
  therefore .data etc. sections into stap-symbols.h.

* tapsets.cxx (iterate_over_modules): Omit a dwfl_getmodules()
  RC-checking assertion that blocked meaningful $context var
  error messages.
  (dwflpp::emit_address): Bypass dwfl_module_relocate_address()
  for kernel symbols as it has been unreliable; subtract sess.sym_stext
  manually.

* testsuite/buildok/seventeen.stp: Extend test with module $global.

1 files changed, 9 insertions, 0 deletions

diff --git a/testsuite/buildok/seventeen.stp b/testsuite/buildok/seventeen.stp
index 126db1fb..4e0b07c4 100755
--- a/testsuite/buildok/seventeen.stp
+++ b/testsuite/buildok/seventeen.stp
@@ -11,3 +11,12 @@ probe kernel.function("pipe_write")
 	printf("0x%x\n", $write_fifo_fops->llseek)
 %)
 }
+
+# PR10000: We're looking for *some* module function that has a nearby global variable in scope
+# XXX: See PR4096
+probe module("nfs").function("nfs_create_client") !, module("nfs").function("nfs_init_client") !,
+	kernel.function("nfs_fsync_dir") {
+	println(kernel_string($nfs_program->name))
+}
+
+probe timer.s(5) { exit() }