[PATCH 12/13] [gdb/testsuite] Add gdb.dwarf2/backward-spec-inter-cu.exp

[Tom de Vries <tdevries@suse.de>]

Add test-case gdb.dwarf2/backward-spec-inter-cu.exp, which excercises the code
added in the previous patch.

Tested on x86_64-linux.
---
 .../gdb.dwarf2/backward-spec-inter-cu.exp     | 111 ++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 gdb/testsuite/gdb.dwarf2/backward-spec-inter-cu.exp

diff --git a/gdb/testsuite/gdb.dwarf2/backward-spec-inter-cu.exp b/gdb/testsuite/gdb.dwarf2/backward-spec-inter-cu.exp
new file mode 100644
index 00000000000..acb6e2ce8b2
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/backward-spec-inter-cu.exp
@@ -0,0 +1,111 @@
+# Copyright 2023 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/>.
+
+# Check that the DWARF reader works with a a DW_AT_specification that
+# refers to a later DIE.  Inter-cu variant of forward-spec.exp.
+
+load_lib dwarf.exp
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+require dwarf2_support
+
+standard_testfile main.c -debug.S
+
+# Set up the DWARF for the test.
+set asm_file [standard_output_file $srcfile2]
+Dwarf::assemble $asm_file {
+    global srcfile
+
+    declare_labels spec
+
+    cu {} {
+	DW_TAG_compile_unit {
+	    {DW_AT_language @DW_LANG_C_plus_plus}
+	} {
+	    declare_labels myint
+
+	    myint: DW_TAG_base_type {
+		{DW_AT_byte_size 4 DW_FORM_sdata}
+		{DW_AT_encoding  @DW_ATE_signed}
+		{DW_AT_name      myint}
+	    }
+
+	    DW_TAG_namespace {
+		{DW_AT_name ns}
+	    } {
+		spec: DW_TAG_variable {
+		    {DW_AT_name v}
+		    {DW_AT_type :$myint}
+		    {DW_AT_declaration 1 DW_FORM_flag_present}
+		}
+	    }
+	}
+    }
+
+    cu {} {
+	DW_TAG_compile_unit {
+	    {DW_AT_language @DW_LANG_C_plus_plus}
+	} {
+	    # The new indexer has special code to compute the full
+	    # name of an object that uses a specification that appears
+	    # later in the DWARF.
+	    DW_TAG_variable {
+		{DW_AT_specification %$spec}
+		{DW_AT_location {
+		    DW_OP_const1u 23
+		    DW_OP_stack_value
+		} SPECIAL_expr}
+	    }
+	}
+    }
+}
+
+if {[build_executable "failed to prepare" ${testfile} \
+	 [list $srcfile $asm_file] {nodebug}]} {
+    return -1
+}
+
+clean_restart
+gdb_test_no_output "maint set worker-threads 0"
+gdb_load $binfile
+
+set in_v 0
+gdb_test_multiple "maint print objfiles" "v has a parent" {
+    -re "^ *\\\[\[0-9\]\\\] *\\(\\(cooked_index_entry\[^\r\n\]*" {
+	set in_v 0
+	exp_continue
+    }
+    -re "^ *name: *v\[\r\n\]*" {
+	set in_v 1
+	exp_continue
+    }
+    -re "^ *parent: *\\(\\(cooked_index_entry \\*\\) (0|$hex)\\)" {
+	if {$in_v} {
+	    if {$expect_out(1,string) == "0"} {
+		fail $gdb_test_name
+	    } else {
+		pass $gdb_test_name
+	    }
+	    set in_v 0
+	}
+	exp_continue
+    }
+    -re "^\[^\r\n\]*\[\r\n\]+" {
+	exp_continue
+    }
+    -re "$gdb_prompt " {
+	# Done.
+    }
+}
-- 
2.35.3