From: Mark Wielaard <mjw@redhat.com>
Date: Thu, 27 Nov 2014 22:19:47 +0000 (+0100)
Subject: tests: vdsosyms call dwfl_linux_proc_attach.
X-Git-Tag: elfutils-0.161~63
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=44662163432677ce2c6c1888ad42c72fb2ebdb63;p=thirdparty%2Felfutils.git

tests: vdsosyms call dwfl_linux_proc_attach.

Older kernels won't let us get at the vdso otherwise.

Signed-off-by: Mark Wielaard <mjw@redhat.com>
---

diff --git a/tests/ChangeLog b/tests/ChangeLog
index 909a61e17..87a453db8 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,3 +1,7 @@
+2014-11-27  Mark Wielaard  <mjw@redhat.com>
+
+	* vdsosyms.c (main): Call dwfl_linux_proc_attach.
+
 2014-11-21  Mark Wielaard  <mjw@redhat.com>
 
 	* run-readelf-A.sh: New test.
diff --git a/tests/vdsosyms.c b/tests/vdsosyms.c
index 831caf427..d04f36a10 100644
--- a/tests/vdsosyms.c
+++ b/tests/vdsosyms.c
@@ -89,6 +89,13 @@ main (int argc __attribute__ ((unused)), char **argv __attribute__ ((unused)))
   else if (result > 0)
     error (2, result, "dwfl_linux_proc_report");
 
+  /* Also explicitly attach for older kernels (cannot read vdso otherwise).  */
+  result = dwfl_linux_proc_attach (dwfl, pid, false);
+  if (result < 0)
+    error (2, 0, "dwfl_linux_proc_attach: %s", dwfl_errmsg (-1));
+  else if (result > 0)
+    error (2, result, "dwfl_linux_proc_attach");
+
   if (dwfl_report_end (dwfl, NULL, NULL) != 0)
     error (2, 0, "dwfl_report_end: %s", dwfl_errmsg (-1));