Merge GDB 7.5.1

gdb/testsuite/gdb.dwarf2/fission-reread.S

Index: gdb/testsuite/gdb.dwarf2/fission-reread.S
diff --git a/gdb/testsuite/gdb.dwarf2/fission-reread.S b/gdb/testsuite/gdb.dwarf2/fission-reread.S
new file mode 100644
index 0000000000000000000000000000000000000000..3ad6518d53319e18cfdbade090dc446ab1e93e83
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/fission-reread.S
@@ -0,0 +1,457 @@
+/* Copyright 2012 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/>.  */
+
+/* Testcase to exercise the code path in bug 13961 for Fission.
+   http://gcc.gnu.org/wiki/DebugFission
+
+   Compiled from:
+
+   class foo
+   {
+    public:
+     int bar;
+   };
+
+   foo baz;
+
+   int
+   main ()
+   {
+     return 0;
+   }
+
+   And then manually edited to insert the necessary DW_AT_specification
+   entries to trigger the desired code path.
+   There's no real need to make this architecture-specific, so it has been
+   further hand-edited to support that.
+*/
+
+	.file	"fission-reread.cc"
+
+	.globl	baz
+	.data	/* Previously this used .bss, but it's not portable.  */
+	.align 4
+	.type	baz, @object
+	.size	baz, 4
+baz:
+	.zero	4
+
+	.text
+.Ltext0:
+	.globl	main
+	.type	main, @function
+main:
+.LFB0:
+	.file 1 "fission-reread.cc"
+	.loc 1 11 0
+	.4byte 0
+.LFE0:
+	.size	main, .-main
+.Letext0:
+
+	.section	.debug_types.dwo
+.Ltu_start_dwo:
+	.4byte	.Ltu_end_dwo - .Ltu_start_dwo - 4	/* Length of Compilation Unit Info */
+	.2byte	0x4	/* DWARF version number */
+	.4byte	.Ldebug_abbrev0	/* Offset Into Abbrev. Section */
+	.byte	0x4	/* Pointer Size (in bytes) */
+	.byte	0x19	/* Type Signature */
+	.byte	0x8b
+	.byte	0x7e
+	.byte	0xac
+	.byte	0xce
+	.byte	0xf1
+	.byte	0x22
+	.byte	0x90
+	.4byte	.Ltu_class_type - .Ltu_start_dwo	/* Offset to Type DIE */
+	.uleb128 0x1	/* (DIE (0x17) DW_TAG_type_unit) */
+	.byte	0x4	/* DW_AT_language */
+	.byte	0x73	/* DW_AT_GNU_odr_signature */
+	.byte	0xea
+	.byte	0x85
+	.byte	0x23
+	.byte	0x75
+	.byte	0x8a
+	.byte	0x7e
+	.byte	0x87
+	.4byte	.Lskeleton_debug_line0	/* DW_AT_stmt_list */
+
+	/* Manually inserted to have a DW_AT_specification refering to
+	   something and appearing ahead of it.  */
+	.uleb128 0x8	/* DW_TAG_class_type */
+	.4byte .Ltu_class_type - .Ltu_start_dwo
+	/* End of manual insertion */
+
+.Ltu_class_type:
+	.uleb128 0x2	/* (DIE (0x25) DW_TAG_class_type) */
+	.ascii "foo\0"	/* DW_AT_name */
+	.byte	0x4	/* DW_AT_byte_size */
+	.byte	0x1	/* DW_AT_decl_file (fission-reread.cc) */
+	.byte	0x1	/* DW_AT_decl_line */
+	.4byte	.Ltu_int	/* DW_AT_sibling */
+	.uleb128 0x3	/* (DIE (0x31) DW_TAG_member) */
+	.ascii "bar\0"	/* DW_AT_name */
+	.byte	0x1	/* DW_AT_decl_file (fission-reread.cc) */
+	.byte	0x4	/* DW_AT_decl_line */
+	.4byte	.Ltu_int	/* DW_AT_type */
+	.byte	0	/* DW_AT_data_member_location */
+	.byte	0x1	/* DW_AT_accessibility */
+	.byte	0	/* end of children of DIE 0x25 */
+.Ltu_int:
+	.uleb128 0x4	/* (DIE (0x3f) DW_TAG_base_type) */
+	.byte	0x4	/* DW_AT_byte_size */
+	.byte	0x5	/* DW_AT_encoding */
+	.ascii "int\0"	/* DW_AT_name */
+	.byte	0	/* end of children of DIE 0x17 */
+.Ltu_end_dwo:
+
+	.section	.debug_types
+.Ltu_start:
+	.4byte	.Ltu_end - .Ltu_start - 4	/* Length of Type Unit Info */
+	.2byte	0x4	/* DWARF version number */
+	.4byte	.Lskeleton_debug_abbrev0	/* Offset Into Abbrev. Section */
+	.byte	0x4	/* Pointer Size (in bytes) */
+	.byte	0x19	/* Type Signature */
+	.byte	0x8b
+	.byte	0x7e
+	.byte	0xac
+	.byte	0xce
+	.byte	0xf1
+	.byte	0x22
+	.byte	0x90
+	.4byte	0	/* Offset to Type DIE */
+	.uleb128 0x2	/* (DIE (0) DW_TAG_type_unit) */
+	.ascii "/tmp/src/gdb/testsuite/gdb.dwarf2\0"	/* DW_AT_comp_dir */
+	/* Normally dwo_name would be "fission-reread.dwo". */
+	/* Simplification: Leave the DWO contents in the executable. */
+	.ascii "fission-reread\0"	/* DW_AT_GNU_dwo_name */
+	.4byte	.Ldebug_pubnames0	/* DW_AT_GNU_pubnames */
+	.4byte	.Ldebug_pubtypes0	/* DW_AT_GNU_pubtypes */
+	.4byte	.Ldebug_addr0	/* DW_AT_GNU_addr_base */
+.Ltu_end:
+
+	.section	.debug_info.dwo
+.Lcu_start_dwo:
+	.4byte	.Lcu_end_dwo - .Lcu_start_dwo - 4	/* Length of Compilation Unit Info */
+	.2byte	0x4	/* DWARF version number */
+	.4byte	.Ldebug_abbrev0	/* Offset Into Abbrev. Section */
+	.byte	0x4	/* Pointer Size (in bytes) */
+	.uleb128 0x5	/* (DIE (0xb) DW_TAG_compile_unit) */
+	.ascii "GNU C++ 4.6.x-fission\0"	/* DW_AT_producer */
+	.byte	0x4	/* DW_AT_language */
+	.ascii "fission-reread.cc\0"	/* DW_AT_name */
+	.ascii "/tmp/src/gdb/testsuite/gdb.dwarf2\0"	/* DW_AT_comp_dir */
+	.byte	0	/* DW_AT_GNU_dwo_id */
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+.Lcu_int:
+	.uleb128 0x4	/* (DIE (0x7f) DW_TAG_base_type) */
+	.byte	0x4	/* DW_AT_byte_size */
+	.byte	0x5	/* DW_AT_encoding */
+	.ascii "int\0"	/* DW_AT_name */
+	.uleb128 0x6	/* (DIE (0x86) DW_TAG_subprogram) */
+			/* DW_AT_external */
+	.ascii "main\0"	/* DW_AT_name */
+	.byte	0x1	/* DW_AT_decl_file (fission-reread.cc) */
+	.byte	0xa	/* DW_AT_decl_line */
+	.4byte	.Lcu_int	/* DW_AT_type */
+	.uleb128 0	/* DW_AT_low_pc */
+	.4byte	.LFE0-.LFB0	/* DW_AT_high_pc */
+	.uleb128 0x1	/* DW_AT_frame_base */
+	.byte	0x9c	/* DW_OP_call_frame_cfa */
+	.uleb128 0x7	/* (DIE (0x9d) DW_TAG_variable) */
+	.ascii "baz\0"	/* DW_AT_name */
+	.byte	0x1	/* DW_AT_decl_file (fission-reread.cc) */
+	.byte	0x7	/* DW_AT_decl_line */
+	.byte	0x19	/* DW_AT_type */
+	.byte	0x8b
+	.byte	0x7e
+	.byte	0xac
+	.byte	0xce
+	.byte	0xf1
+	.byte	0x22
+	.byte	0x90
+			/* DW_AT_external */
+	.uleb128 0x2	/* DW_AT_location */
+	.byte	0xfb	/* DW_OP_GNU_addr_index */
+	.uleb128 0x1	/* (index into .debug_addr) */
+	.byte	0	/* end of children of DIE 0xb */
+.Lcu_end_dwo:
+
+	.section	.debug_info
+.Lskeleton_debug_info0:
+.Lcu_start:
+	.4byte	.Lcu_end - .Lcu_start - 4	/* Length of Compilation Unit Info */
+	.2byte	0x4	/* DWARF version number */
+	.4byte	.Lskeleton_debug_abbrev0	/* Offset Into Abbrev. Section */
+	.byte	0x4	/* Pointer Size (in bytes) */
+	.uleb128 0x1	/* (DIE (0) DW_TAG_compile_unit) */
+	.4byte	.Ltext0	/* DW_AT_low_pc */
+	.4byte	.Letext0-.Ltext0	/* DW_AT_high_pc */
+	.4byte	.Ldebug_line0	/* DW_AT_stmt_list */
+	.ascii "/tmp/src/gdb/testsuite/gdb.dwarf2\0"	/* DW_AT_comp_dir */
+	/* Normally dwo_name would be "fission-reread.dwo". */
+	/* Simplification: Leave the DWO contents in the executable. */
+	.ascii "fission-reread\0"	/* DW_AT_GNU_dwo_name */
+	.4byte	.Ldebug_pubnames0	/* DW_AT_GNU_pubnames */
+	.4byte	.Ldebug_pubtypes0	/* DW_AT_GNU_pubtypes */
+	.4byte	.Ldebug_addr0	/* DW_AT_GNU_addr_base */
+	.byte	0	/* DW_AT_GNU_dwo_id */
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+.Lcu_end:
+
+	.section	.debug_abbrev
+.Lskeleton_debug_abbrev0:
+	.uleb128 0x1	/* (abbrev code) */
+	.uleb128 0x11	/* (TAG: DW_TAG_compile_unit) */
+	.byte	0	/* DW_children_no */
+	.uleb128 0x11	/* (DW_AT_low_pc) */
+	.uleb128 0x1	/* (DW_FORM_addr) */
+	.uleb128 0x12	/* (DW_AT_high_pc) */
+	.uleb128 0x6	/* (DW_FORM_data4) */
+	.uleb128 0x10	/* (DW_AT_stmt_list) */
+	.uleb128 0x17	/* (DW_FORM_sec_offset) */
+	.uleb128 0x1b	/* (DW_AT_comp_dir) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x2130	/* (DW_AT_GNU_dwo_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x2134	/* (DW_AT_GNU_pubnames) */
+	.uleb128 0x17	/* (DW_FORM_sec_offset) */
+	.uleb128 0x2135	/* (DW_AT_GNU_pubtypes) */
+	.uleb128 0x17	/* (DW_FORM_sec_offset) */
+	.uleb128 0x2133	/* (DW_AT_GNU_addr_base) */
+	.uleb128 0x17	/* (DW_FORM_sec_offset) */
+	.uleb128 0x2131	/* (DW_AT_GNU_dwo_id) */
+	.uleb128 0x7	/* (DW_FORM_data8) */
+	.byte	0
+	.byte	0
+	.uleb128 0x2	/* (abbrev code) */
+	.uleb128 0x41	/* (TAG: DW_TAG_type_unit) */
+	.byte	0	/* DW_children_no */
+	.uleb128 0x1b	/* (DW_AT_comp_dir) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x2130	/* (DW_AT_GNU_dwo_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x2134	/* (DW_AT_GNU_pubnames) */
+	.uleb128 0x17	/* (DW_FORM_sec_offset) */
+	.uleb128 0x2135	/* (DW_AT_GNU_pubtypes) */
+	.uleb128 0x17	/* (DW_FORM_sec_offset) */
+	.uleb128 0x2133	/* (DW_AT_GNU_addr_base) */
+	.uleb128 0x17	/* (DW_FORM_sec_offset) */
+	.byte	0
+	.byte	0
+	.byte	0	/* end of skeleton .debug_abbrev */
+	.section	.debug_abbrev.dwo
+.Ldebug_abbrev0:
+	.uleb128 0x1	/* (abbrev code) */
+	.uleb128 0x41	/* (TAG: DW_TAG_type_unit) */
+	.byte	0x1	/* DW_children_yes */
+	.uleb128 0x13	/* (DW_AT_language) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x210f	/* (DW_AT_GNU_odr_signature) */
+	.uleb128 0x7	/* (DW_FORM_data8) */
+	.uleb128 0x10	/* (DW_AT_stmt_list) */
+	.uleb128 0x17	/* (DW_FORM_sec_offset) */
+	.byte	0
+	.byte	0
+	.uleb128 0x2	/* (abbrev code) */
+	.uleb128 0x2	/* (TAG: DW_TAG_class_type) */
+	.byte	0x1	/* DW_children_yes */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0xb	/* (DW_AT_byte_size) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x3a	/* (DW_AT_decl_file) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x3b	/* (DW_AT_decl_line) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x1	/* (DW_AT_sibling) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.byte	0
+	.byte	0
+	.uleb128 0x3	/* (abbrev code) */
+	.uleb128 0xd	/* (TAG: DW_TAG_member) */
+	.byte	0	/* DW_children_no */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x3a	/* (DW_AT_decl_file) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x3b	/* (DW_AT_decl_line) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.uleb128 0x38	/* (DW_AT_data_member_location) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x32	/* (DW_AT_accessibility) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.byte	0
+	.byte	0
+	.uleb128 0x4	/* (abbrev code) */
+	.uleb128 0x24	/* (TAG: DW_TAG_base_type) */
+	.byte	0	/* DW_children_no */
+	.uleb128 0xb	/* (DW_AT_byte_size) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x3e	/* (DW_AT_encoding) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.byte	0
+	.byte	0
+	.uleb128 0x5	/* (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) */
+	.uleb128 0x1b	/* (DW_AT_comp_dir) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x2131	/* (DW_AT_GNU_dwo_id) */
+	.uleb128 0x7	/* (DW_FORM_data8) */
+	.byte	0
+	.byte	0
+	.uleb128 0x6	/* (abbrev code) */
+	.uleb128 0x2e	/* (TAG: DW_TAG_subprogram) */
+	.byte	0	/* DW_children_no */
+	.uleb128 0x3f	/* (DW_AT_external) */
+	.uleb128 0x19	/* (DW_FORM_flag_present) */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x3a	/* (DW_AT_decl_file) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x3b	/* (DW_AT_decl_line) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.uleb128 0x11	/* (DW_AT_low_pc) */
+	.uleb128 0x1f01	/* (DW_FORM_GNU_addr_index) */
+	.uleb128 0x12	/* (DW_AT_high_pc) */
+	.uleb128 0x6	/* (DW_FORM_data4) */
+	.uleb128 0x40	/* (DW_AT_frame_base) */
+	.uleb128 0x18	/* (DW_FORM_exprloc) */
+	.byte	0
+	.byte	0
+	.uleb128 0x7	/* (abbrev code) */
+	.uleb128 0x34	/* (TAG: DW_TAG_variable) */
+	.byte	0	/* DW_children_no */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x3a	/* (DW_AT_decl_file) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x3b	/* (DW_AT_decl_line) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x20	/* (DW_FORM_ref_sig8) */
+	.uleb128 0x3f	/* (DW_AT_external) */
+	.uleb128 0x19	/* (DW_FORM_flag_present) */
+	.uleb128 0x2	/* (DW_AT_location) */
+	.uleb128 0x18	/* (DW_FORM_exprloc) */
+	.byte	0
+	.byte	0
+
+	/* Manually inserted.  */
+	.uleb128 0x8		/* abbrev code */
+	.uleb128 0x2		/* DW_TAG_class_type */
+	.byte	0x0		/* DW_has_children_no */
+	.uleb128 0x47		/* DW_AT_specification */
+	.uleb128 0x13		/* DW_FORM_ref4 */
+	.byte	0x0		/* Terminator */
+	.byte	0x0		/* Terminator */
+	/* End of manual insertion.  */
+
+	.byte	0
+	.section	.debug_pubnames
+.Ldebug_pubnames0:
+	.4byte	0x1f	/* Length of Public Names Info */
+	.2byte	0x2	/* DWARF Version */
+	.4byte	.Lskeleton_debug_info0	/* Offset of Compilation Unit Info */
+	.4byte	0xb0	/* Compilation Unit Length */
+	.4byte	0x86	/* DIE offset */
+	.ascii "main\0"	/* external name */
+	.4byte	0x9d	/* DIE offset */
+	.ascii "baz\0"	/* external name */
+	.4byte	0
+	.section	.debug_pubtypes
+.Ldebug_pubtypes0:
+	.4byte	0x1e	/* Length of Public Type Names Info */
+	.2byte	0x2	/* DWARF Version */
+	.4byte	.Lskeleton_debug_info0	/* Offset of Compilation Unit Info */
+	.4byte	0xb0	/* Compilation Unit Length */
+	.4byte	0x7f	/* DIE offset */
+	.ascii "int\0"	/* external name */
+	.4byte	0x25	/* DIE offset */
+	.ascii "foo\0"	/* external name */
+	.4byte	0
+	.section	.debug_aranges
+	.4byte	0x2c	/* Length of Address Ranges Info */
+	.2byte	0x2	/* DWARF Version */
+	.4byte	.Lskeleton_debug_info0	/* Offset of Compilation Unit Info */
+	.byte	0x8	/* Size of Address */
+	.byte	0	/* Size of Segment Descriptor */
+	.2byte	0	/* Pad to 16 byte boundary */
+	.2byte	0
+	.4byte	.Ltext0	/* Address */
+	.4byte	.Letext0-.Ltext0	/* Length */
+	.4byte	0
+	.4byte	0
+	.section	.debug_line
+.Ldebug_line0:
+	.section	.debug_line.dwo
+.Lskeleton_debug_line0:
+	.4byte	.LELT0-.LSLT0	/* Length of Source Line Info */
+.LSLT0:
+	.2byte	0x4	/* DWARF Version */
+	.4byte	.LELTP0-.LASLTP0	/* Prolog Length */
+.LASLTP0:
+	.byte	0x1	/* Minimum Instruction Length */
+	.byte	0x1	/* Maximum Operations Per Instruction */
+	.byte	0x1	/* Default is_stmt_start flag */
+	.byte	0xf6	/* Line Base Value (Special Opcodes) */
+	.byte	0xf5	/* Line Range Value (Special Opcodes) */
+	.byte	0xa	/* Special Opcode Base */
+	.byte	0	/* opcode: 0x1 has 0 args */
+	.byte	0x1	/* opcode: 0x2 has 1 args */
+	.byte	0x1	/* opcode: 0x3 has 1 args */
+	.byte	0x1	/* opcode: 0x4 has 1 args */
+	.byte	0x1	/* opcode: 0x5 has 1 args */
+	.byte	0	/* opcode: 0x6 has 0 args */
+	.byte	0	/* opcode: 0x7 has 0 args */
+	.byte	0	/* opcode: 0x8 has 0 args */
+	.byte	0x1	/* opcode: 0x9 has 1 args */
+	.byte	0	/* End directory table */
+	.ascii "fission-reread.cc\0"	/* File Entry: 0x1 */
+	.uleb128 0
+	.uleb128 0
+	.uleb128 0
+	.byte	0	/* End file name table */
+.LELTP0:
+.LELT0:
+	.section	.debug_addr
+.Ldebug_addr0:
+	.4byte	.LFB0	/* DW_AT_low_pc */
+	.4byte	baz	/* DW_AT_location */