[patch] new test: Ada 0xffffffff size attribute value

[Jan Kratochvil <jan dot kratochvil at redhat dot com>]

Hi,

workaround of the GCC Bug:
	http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35998

First post:
	[patch] Workaround ada (gnat-4.3.0) on x86_64
	http://sourceware.org/ml/gdb-patches/2008-04/msg00427.html

Fix check-in:
	073fb4d687908530530f195d0fe1ca11f76400f0
	[RFA/RFC/dwarf] detect 0xffffffff size attribute values
	http://sourceware.org/ml/gdb-patches/2008-06/msg00341.html

So posting here a testcase.  Tested on {x86_64,x86_64-m32}-fedora14-linux-gnu.
I will check it in in some days.


Thanks,
Jan


gdb/testsuite/
2010-11-19  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* gdb.dwarf2/dw2-ada-ffffffff.S: New file.
	* gdb.dwarf2/dw2-ada-ffffffff.exp: New file.

--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-ada-ffffffff.S
@@ -0,0 +1,55 @@
+/* Copyright 2010 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/>.  */
+
+	.section	.debug_info
+debug_start:
+	.long	debug_end - 1f	/* Length of Compilation Unit Info */
+1:
+	.2byte	0x3	/* DWARF version number */
+	.long	.Ldebug_abbrev0	/* Offset Into Abbrev. Section */
+	.byte	0x4	/* Pointer Size (in bytes) */
+	.uleb128 0x1	/* (DIE (0xb) DW_TAG_compile_unit) */
+	.ascii "GNU C 4.4.3\0"	/* DW_AT_producer */
+	.byte	0x03	/* DW_AT_language = DW_LANG_Ada83 */
+	.ascii "1.adb\0"	/* DW_AT_name */
+	.uleb128 0x4	/* DW_TAG_structure_type */
+	.ascii "t\0"	/* DW_AT_name */
+	.4byte	0xffffffff	/* DW_AT_byte_size */
+	.byte	0x0	/* end of children of CU */
+debug_end:
+
+	.section	.debug_abbrev
+.Ldebug_abbrev0:
+	.uleb128 0x1	/* (abbrev code) */
+	.uleb128 0x11	/* (TAG: DW_TAG_compile_unit) */
+	.byte	0x1	/* DW_children_yes */
+	.uleb128 0x25	/* (DW_AT_producer) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x13	/* (DW_AT_language) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.byte	0x0
+	.byte	0x0
+	.uleb128 0x4	/* (abbrev code) */
+	.uleb128 0x13	/* (TAG: DW_TAG_structure_type) */
+	.byte	0x0	/* DW_children_yes */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x0b	/* (DW_AT_byte_size) */
+	.uleb128 0x6	/* (DW_FORM_data4) */
+	.byte	0x0
+	.byte	0x0
+	.byte	0x0
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-ada-ffffffff.exp
@@ -0,0 +1,44 @@
+# Copyright 2010 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/>.
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+# For now pick a sampling of likely targets.
+if {![istarget *-*-linux*]
+    && ![istarget *-*-gnu*]
+    && ![istarget *-*-elf*]
+    && ![istarget *-*-openbsd*]
+    && ![istarget arm-*-eabi*]
+    && ![istarget powerpc-*-eabi*]} {
+    return 0  
+}
+
+set testfile "dw2-ada-ffffffff"
+set srcfile ${testfile}.S
+set executable ${testfile}.x
+set binfile ${objdir}/${subdir}/${executable}
+
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" object {}] != "" } {
+    return -1
+}
+
+clean_restart $executable
+
+# -1 was produced, it is now caught with the complaint:
+# Suspicious DW_AT_byte_size value treated as zero instead of ...
+gdb_test "p sizeof (t)" " = 0"
+
+# Formerly:
+# utils.c:N: internal-error: virtual memory exhausted: can't allocate 4294967295 bytes.
+gdb_test "ptype t" "type = struct t {\r\n *<no data fields>\r\n}"