GCC5/DWARFv5 Handle DW_TAG_atomic_type for C11 _Atomic type qualifier.

gdb/ChangeLog

	* c-typeprint.c (cp_type_print_method_args): Handle '_Atomic'.
	(c_type_print_modifier): Likewise.
	* dwarf2read.c (read_tag_atomic_type): New function.
	(read_type_die_1): Handle DW_TAG_atomic_type.
	* gdbtypes.c (make_atomic_type): New function.
	(recursive_dump_type): Handle TYPE_ATOMIC.
	* gdbtypes.h (enum type_flag_values): Renumber.
	(enum type_instance_flag_value): Add TYPE_INSTANCE_FLAG_ATOMIC.
	(TYPE_ATOMIC): New macro.
	(make_atomic_type): Declare.

gdb/testsuite/ChangeLog

	* gdb.dwarf2/atomic.c: New file.
	* gdb.dwarf2/atomic-type.exp: Likewise.

include/ChangeLog

	* dwarf2.def: Add DW_TAG_atomic_type.

2 files changed, 123 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.dwarf2/atomic-type.exp b/gdb/testsuite/gdb.dwarf2/atomic-type.exp
new file mode 100644
index 0000000..fb315e3
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/atomic-type.exp
@@ -0,0 +1,89 @@
+# Copyright 2014, 2015 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/>.
+load_lib dwarf.exp
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+if {![dwarf2_support]} {
+    return 0
+}
+
+standard_testfile atomic.c atomic-type-dw.S
+
+# Make some DWARF for the test.
+
+set asm_file [standard_output_file $srcfile2]
+Dwarf::assemble $asm_file {
+    cu {} {
+	DW_TAG_compile_unit {
+                {DW_AT_language @DW_LANG_C11}
+                {DW_AT_name     atomic-type-dw.c}
+                {DW_AT_comp_dir /tmp}
+        } {
+	    declare_labels i_l c_l c_c_l ac_c_l pac_c_l vpac_c_l avpac_c_l
+
+            i_l: DW_TAG_base_type {
+                {DW_AT_byte_size 4 DW_FORM_sdata}
+                {DW_AT_encoding  @DW_ATE_signed}
+                {DW_AT_name      int}
+            }
+
+            c_l: DW_TAG_base_type {
+                {DW_AT_byte_size 2 DW_FORM_sdata}
+                {DW_AT_encoding  @DW_ATE_unsigned}
+                {DW_AT_name      char}
+            }
+
+            c_c_l: DW_TAG_const_type {
+                {DW_AT_type :$c_l}
+            }
+
+            ac_c_l: DW_TAG_atomic_type {
+                {DW_AT_type :$c_c_l}
+            }
+
+            pac_c_l: DW_TAG_pointer_type {
+                {DW_AT_byte_size 8 DW_FORM_sdata}
+                {DW_AT_type :$ac_c_l}
+            }
+
+            vpac_c_l: DW_TAG_volatile_type {
+                {DW_AT_type :$pac_c_l}
+            }
+
+            avpac_c_l: DW_TAG_atomic_type {
+                {DW_AT_type :$vpac_c_l}
+            }
+
+            DW_TAG_subprogram {
+                {name f}
+                {low_pc f addr}
+                {high_pc f_end_lbl addr}
+                {type :$i_l}
+            } {
+                DW_TAG_formal_parameter {
+                    {type :$avpac_c_l}
+                    {name x}
+                }
+            }
+	}
+    }
+}
+
+if { [prepare_for_testing ${testfile}.exp ${testfile} \
+	  [list $srcfile $asm_file] {nodebug}] } {
+    return -1
+}
+
+gdb_test "ptype f" "int \\(const _Atomic char \\\* volatile _Atomic\\)"
diff --git a/gdb/testsuite/gdb.dwarf2/atomic.c b/gdb/testsuite/gdb.dwarf2/atomic.c
new file mode 100644
index 0000000..3553cdf
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/atomic.c
@@ -0,0 +1,34 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2004-2015 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/>.  */
+
+/* Dummy main function.  */
+
+int
+main (void)
+{
+  asm ("main_label: .globl main_label");
+  return 0;
+}
+
+/* dummy f function, DWARF will describe arguments and type differently.  */
+int
+f (char *x)
+{
+  asm (".global f_end_lbl\nf_end_lbl:");
+  return 0;
+}
+