PR symtab/19914 fix handling of dwp + split debug

	PR symtab/19914
	* dwarf2read.c (open_and_init_dwp_file): Look at backlink if objfile
	is separate debug file.

	testsuite/
	* gdb.dwarf2/dwp-sepdebug.c: New file.
	* gdb.dwarf2/dwp-sepdebug.exp: New file.

2 files changed, 62 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.dwarf2/dwp-sepdebug.c b/gdb/testsuite/gdb.dwarf2/dwp-sepdebug.c
new file mode 100644
index 0000000..bb11da2
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dwp-sepdebug.c
@@ -0,0 +1,22 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2016 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+int
+main (int argc, char **argv)
+{
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.dwarf2/dwp-sepdebug.exp b/gdb/testsuite/gdb.dwarf2/dwp-sepdebug.exp
new file mode 100644
index 0000000..a4e7068
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dwp-sepdebug.exp
@@ -0,0 +1,40 @@
+# Copyright 2016 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+standard_testfile
+
+if { [build_executable ${testfile}.exp ${testfile} ${srcfile}] == -1 } {
+    return -1
+}
+if ![remote_file host exists [standard_output_file ${testfile}.dwp]] {
+    unsupported "testsuite run does not produce dwp files"
+    return 0
+}
+
+# Note: the procedure gdb_gnu_strip_debug will produce an executable called
+# ${binfile}, which is just like the executable ($binfile) but without
+# the debuginfo. Instead $binfile has a .gnu_debuglink section which contains
+# the name of a debuginfo only file. This file will be stored in the
+# gdb.base/ subdirectory.
+
+if [gdb_gnu_strip_debug $binfile$EXEEXT] {
+    # check that you have a recent version of strip and objcopy installed
+    unsupported "cannot produce separate debug info files"
+    return -1
+}
+
+clean_restart "$testfile"
+
+gdb_test "ptype main" {type = int \(int, char \*\*\)}