* gc.h (Garbage_collection::Cident_section_map): New typedef.

	(Garbage_collection::cident_sections): New function.
	(Garbage_collection::add_cident_section): New function.
	(Garbage_collection::cident_sections_): New member.
	(gc_process_relocs): Add references to sections whose names are C
	identifiers.
	* gold.h (cident_section_start_prefix): New constant.
	(cident_section_stop_prefix): New constant.
	(is_cident): New function.
	* layout.cc (Layout::define_section_symbols): Replace string constants
	with the newly defined constants.
	* object.cc (Sized_relobj::do_layout): Track sections whose names are
	C identifiers.
	* testsuite/Makefile.am: Add gc_orphan_section_test.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/gc_orphan_section_test.cc: New file.
	* testsuite/gc_orphan_section_test.sh: New file.

1 files changed, 36 insertions, 0 deletions

diff --git a/gold/testsuite/gc_orphan_section_test.cc b/gold/testsuite/gc_orphan_section_test.cc
new file mode 100644
index 0000000000..3443f8d2a5
--- /dev/null
+++ b/gold/testsuite/gc_orphan_section_test.cc
@@ -0,0 +1,36 @@
+// gc_orphan_section_test.cc -- a test case for gold
+
+// Copyright 2010 Free Software Foundation, Inc.
+// Written by Sriraman Tallam <tmsriram@google.com>.
+
+// This file is part of gold.
+
+// 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, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+// The goal of this program is to verify if garbage collection does not
+// discard orphan sections when references to them through __start_XXX
+// and __stop_XXX are present.  Here section _foo must not be gc'ed but
+// _boo should be gc'ed.
+
+extern const int *__start__foo;
+int foo __attribute__((__section__("_foo"))) = 1;
+int boo __attribute__((__section__("_boo"))) = 1;
+
+int main()
+{
+  return *__start__foo;
+}
+