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gdb/gdb-empty-namespace.patch

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gdb/
2009-12-20 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix compatibility with G++-4.1.
* dwarf2read.c (partial_die_parent_scope): New variable PARENT_NAME.
Ignore parent namespaces with name "::".
(physname_prefix_1): Ignore namespaces with name "::".
gdb/testsuite/
2009-12-20 Jan Kratochvil <jan.kratochvil@redhat.com>
* gdb.dwarf2/dw2-empty-namespace.exp, gdb.dwarf2/dw2-empty-namespace.S:
New.
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -2355,11 +2355,18 @@ partial_die_parent_scope (struct partial_die_info *pdi,
|| parent->tag == DW_TAG_interface_type
|| parent->tag == DW_TAG_union_type)
{
+ char *parent_name = parent->name;
+
+ /* G++ 4.1 produced DW_TAG_namespace with DW_AT_name "::". */
+ if (parent->tag == DW_TAG_namespace && parent_name != NULL
+ && strcmp (parent_name, "::") == 0)
+ parent_name = NULL;
+
if (grandparent_scope == NULL)
- parent->scope = parent->name;
+ parent->scope = parent_name;
else
parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
- parent->name, cu);
+ parent_name, cu);
}
else if (parent->tag == DW_TAG_enumeration_type)
/* Enumerators should not get the name of the enumeration as a prefix. */
@@ -9008,6 +9015,9 @@ physname_prefix_1 (struct ui_file *buf, struct die_info *die,
name = dwarf2_name (die, cu);
if (name == NULL)
name = "(anonymous namespace)";
+ /* G++ 4.1 produced DW_TAG_namespace with DW_AT_name "::". */
+ else if (strcmp (name, "::") == 0)
+ name = NULL;
break;
case DW_TAG_class_type:
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-empty-namespace.S
@@ -0,0 +1,108 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2009 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/>. */
+
+/* Test G++ 4.1 producing DW_TAG_namespace with DW_AT_name "::". */
+
+ .data
+var: .4byte 1
+
+ .section .debug_info
+.Lcu1_begin:
+ /* CU header */
+ .4byte .Lcu1_end - .Lcu1_start /* Length of Compilation Unit */
+.Lcu1_start:
+ .2byte 2 /* DWARF Version */
+ .4byte .Labbrev1_begin /* Offset into abbrev section */
+ .byte 4 /* Pointer size */
+
+ /* CU die */
+ .uleb128 1 /* Abbrev: DW_TAG_compile_unit */
+ .ascii "file1.txt\0" /* DW_AT_name */
+ .ascii "GNU C 3.3.3\0" /* DW_AT_producer */
+ .byte 4 /* DW_LANG_C_plus_plus (C++) */
+
+.Ltype_int:
+ .uleb128 2 /* Abbrev: DW_TAG_base_type */
+ .ascii "int\0" /* DW_AT_name */
+ .byte 4 /* DW_AT_byte_size */
+ .byte 5 /* DW_AT_encoding */
+
+ .uleb128 3 /* Abbrev: DW_TAG_namespace */
+ .ascii "::\0" /* DW_AT_name */
+
+ .uleb128 7 /* Abbrev: DW_TAG_variable (location) */
+ .ascii "var\0" /* DW_AT_name */
+ .byte 2f - 1f /* DW_AT_location */
+1: .byte 3 /* DW_OP_addr */
+ .4byte var /* <addr> */
+2: .4byte .Ltype_int-.Lcu1_begin /* DW_AT_type */
+
+ .byte 0 /* End of children of DW_TAG_namespace */
+
+ .byte 0 /* End of children of CU */
+
+.Lcu1_end:
+
+/* Abbrev table */
+ .section .debug_abbrev
+.Labbrev1_begin:
+ .uleb128 1 /* Abbrev code */
+ .uleb128 0x11 /* DW_TAG_compile_unit */
+ .byte 1 /* has_children */
+ .uleb128 0x3 /* DW_AT_name */
+ .uleb128 0x8 /* DW_FORM_string */
+ .uleb128 0x25 /* DW_AT_producer */
+ .uleb128 0x8 /* DW_FORM_string */
+ .uleb128 0x13 /* DW_AT_language */
+ .uleb128 0xb /* DW_FORM_data1 */
+ .byte 0x0 /* Terminator */
+ .byte 0x0 /* Terminator */
+
+ .uleb128 2 /* Abbrev code */
+ .uleb128 0x24 /* DW_TAG_base_type */
+ .byte 0 /* has_children */
+ .uleb128 0x3 /* DW_AT_name */
+ .uleb128 0x8 /* DW_FORM_string */
+ .uleb128 0xb /* DW_AT_byte_size */
+ .uleb128 0xb /* DW_FORM_data1 */
+ .uleb128 0x3e /* DW_AT_encoding */
+ .uleb128 0xb /* DW_FORM_data1 */
+ .byte 0x0 /* Terminator */
+ .byte 0x0 /* Terminator */
+
+ .uleb128 3 /* Abbrev code */
+ .uleb128 0x39 /* DW_TAG_namespace */
+ .byte 1 /* has_children */
+ .uleb128 0x3 /* DW_AT_name */
+ .uleb128 0x8 /* DW_FORM_string */
+ .byte 0x0 /* Terminator */
+ .byte 0x0 /* Terminator */
+
+ .uleb128 7 /* Abbrev code (location) */
+ .uleb128 0x34 /* DW_TAG_variable */
+ .byte 0 /* has_children */
+ .uleb128 0x3 /* DW_AT_name */
+ .uleb128 0x8 /* DW_FORM_string */
+ .uleb128 0x2 /* DW_AT_location */
+ .uleb128 0xa /* DW_FORM_block1 */
+ .uleb128 0x49 /* DW_AT_type */
+ .uleb128 0x13 /* DW_FORM_ref4 */
+ .byte 0x0 /* Terminator */
+ .byte 0x0 /* Terminator */
+
+ .byte 0x0 /* Terminator */
+ .byte 0x0 /* Terminator */
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-empty-namespace.exp
@@ -0,0 +1,43 @@
+# Copyright 2009 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/>.
+
+# Test G++ 4.1 producing DW_TAG_namespace with DW_AT_name "::".
+
+# 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-empty-namespace"
+set srcfile ${testfile}.S
+set executable ${testfile}.x
+
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${objdir}/${subdir}/${executable}" object {nodebug}] != "" } {
+ return -1
+}
+
+clean_restart $executable
+
+# `p var' below can work without identified DWARF DIE just based on its ELF symbol.
+# Catch it here as `type = <data variable, no debug info>'.
+gdb_test "ptype var" "type = int"
+
+gdb_test "p var" " = 1"
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