gdb: fix "optimized out" error with debug fission.

This patch comes from
https://sourceware.org/ml/gdb-patches/2016-04/msg00658.html
The bug entry is
https://sourceware.org/bugzilla/show_bug.cgi?id=19999

This patch fixes symtab/19999.
The problem here is that while we don't want to add the DWARF "base address"
for DWO files (where addresses come from .debug_addr where the base address
has already been added), we still need to add base_offset for PIE.

Regression tested on amd64-linux.

2016-04-29  Doug Evans  <dje@google.com>

	PR symtab/19999
	* dwarf2loc.c (dwarf2_find_location_expression): For DWO files still
	add base_offset.

	testsuite/
	* lib/dwarf.exp (build_executable_from_fission_assembler): Pass
	$options when building executable.
	* gdb.dwarf2/fission-loclists-pie.S: New file.
	* gdb.dwarf2/fission-loclists-pie.exp: New file.

BUG=chromium:439320
TEST=the unittest in the patch passe

4 files changed, 553 insertions, 4 deletions

diff --git a/gdb-7.11/gdb/dwarf2loc.c b/gdb-7.11/gdb/dwarf2loc.c
index ba6ed4244..bfe11730a 100644
--- a/gdb-7.11/gdb/dwarf2loc.c
+++ b/gdb-7.11/gdb/dwarf2loc.c
@@ -255,9 +255,15 @@ dwarf2_find_location_expression (struct dwarf2_loclist_baton *baton,
 	}
 
       /* Otherwise, a location expression entry.
-	 If the entry is from a DWO, don't add base address: the entry is
-	 from .debug_addr which has absolute addresses.  */
-      if (! baton->from_dwo)
+	 If the entry is from a DWO, don't add base address: the entry is from
+	 .debug_addr which already has the DWARF "base address".  We still add
+	 base_offset in case we're debugging a PIE executable.  */
+      if (baton->from_dwo)
+	{
+	  low += base_offset;
+	  high += base_offset;
+	}
+      else
 	{
 	  low += base_address;
 	  high += base_address;
diff --git a/gdb-7.11/gdb/testsuite/gdb.dwarf2/fission-loclists-pie.S b/gdb-7.11/gdb/testsuite/gdb.dwarf2/fission-loclists-pie.S
new file mode 100644
index 000000000..7e9dc4779
--- /dev/null
+++ b/gdb-7.11/gdb/testsuite/gdb.dwarf2/fission-loclists-pie.S
@@ -0,0 +1,482 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2013-2016 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 file was created by doing:
+   gcc -O1 -gdwarf-4 -gsplit-debug -fPIE -S -dA fission-loclists-pie.c
+   and then massaging the output.
+
+   fission-loclists-pie.c:
+
+   __attribute__((noinline)) int
+   init (int *b)
+   {
+     return 0;
+   }
+
+   int
+   main (int argc, char *argv[])
+   {
+     return init (&argc);
+   }
+*/
+
+	.file	"fission-loclists-pie.c"
+	.text
+.Ltext0:
+	.globl	init
+	.type	init, @function
+init:
+.LFB0:
+	.file 1 "testsuite/gdb.dwarf2/fission-loclists-pie.c"
+	# testsuite/gdb.dwarf2/fission-loclists-pie.c:22
+	.loc 1 22 0
+	.cfi_startproc
+.LVL0:
+# BLOCK 2 freq:10000 seq:0
+# PRED: ENTRY [100.0%]  (FALLTHRU)
+	# testsuite/gdb.dwarf2/fission-loclists-pie.c:24
+	.loc 1 24 0
+	movl	$0, %eax
+# SUCC: EXIT [100.0%]
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	init, .-init
+	.globl	main
+	.type	main, @function
+main:
+.LFB1:
+	# testsuite/gdb.dwarf2/fission-loclists-pie.c:28
+	.loc 1 28 0
+	.cfi_startproc
+.LVL1:
+# BLOCK 2 freq:10000 seq:0
+# PRED: ENTRY [100.0%]  (FALLTHRU)
+	subq	$8, %rsp
+	.cfi_def_cfa_offset 16
+	# testsuite/gdb.dwarf2/fission-loclists-pie.c:29
+	.loc 1 29 0
+	leaq	4(%rsp), %rdi
+.LVL2:
+	call	init
+.LVL3:
+	# testsuite/gdb.dwarf2/fission-loclists-pie.c:30
+	.loc 1 30 0
+	addq	$8, %rsp
+	.cfi_def_cfa_offset 8
+# SUCC: EXIT [100.0%]
+	ret
+	.cfi_endproc
+.LFE1:
+	.size	main, .-main
+.Letext0:
+	.section	.debug_addr,"",@progbits
+.Ldebug_addr0:
+	.quad	.LVL1	# 0x0
+	.quad	.LVL2	# 0x1
+	.quad	.LVL3	# 0x2
+	.quad	.LFB0	# 0x3
+	.quad	.LFB1	# 0x4
+	.quad	.LVL3-1	# 0x5
+	.section	.debug_info.dwo,"e",@progbits
+.Ldebug_info0:
+	.long	0x91	# Length of Compilation Unit Info
+	.value	0x4	# DWARF version number
+	.long	.Ldebug_abbrev0	# Offset Into Abbrev. Section
+	.byte	0x8	# Pointer Size (in bytes)
+	.uleb128 0x1	# (DIE (0xb) DW_TAG_compile_unit)
+	.uleb128 0x4	# DW_AT_producer: "GNU C 4.9.x -m64 -mtune=generic -march=x86-64 -gdwarf-4 -gsplit-dwarf -O1 -fPIE"
+	.byte	0x1	# DW_AT_language
+	.uleb128 0x6	# DW_AT_name: "testsuite/gdb.dwarf2/fission-loclists-pie.c"
+	.byte	0xed	# DW_AT_GNU_dwo_id
+	.byte	0x50
+	.byte	0xa4
+	.byte	0xe0
+	.byte	0xc9
+	.byte	0xf8
+	.byte	0xd3
+	.byte	0xf0
+	.uleb128 0x2	# (DIE (0x17) DW_TAG_subprogram)
+			# DW_AT_external
+	.uleb128 0x5	# DW_AT_name: "init"
+	.byte	0x1	# DW_AT_decl_file (testsuite/gdb.dwarf2/fission-loclists-pie.c)
+	.byte	0x15	# DW_AT_decl_line
+			# DW_AT_prototyped
+	.long	0x3a	# DW_AT_type
+	.uleb128 0x3	# DW_AT_low_pc
+	.quad	.LFE0-.LFB0	# DW_AT_high_pc
+	.uleb128 0x1	# DW_AT_frame_base
+	.byte	0x9c	# DW_OP_call_frame_cfa
+			# DW_AT_GNU_all_call_sites
+	.long	0x3a	# DW_AT_sibling
+	.uleb128 0x3	# (DIE (0x2e) DW_TAG_formal_parameter)
+	.ascii "b\0"	# DW_AT_name
+	.byte	0x1	# DW_AT_decl_file (testsuite/gdb.dwarf2/fission-loclists-pie.c)
+	.byte	0x15	# DW_AT_decl_line
+	.long	0x41	# DW_AT_type
+	.uleb128 0x1	# DW_AT_location
+	.byte	0x55	# DW_OP_reg5
+	.byte	0	# end of children of DIE 0x17
+	.uleb128 0x4	# (DIE (0x3a) DW_TAG_base_type)
+	.byte	0x4	# DW_AT_byte_size
+	.byte	0x5	# DW_AT_encoding
+	.ascii "int\0"	# DW_AT_name
+	.uleb128 0x5	# (DIE (0x41) DW_TAG_pointer_type)
+	.byte	0x8	# DW_AT_byte_size
+	.long	0x3a	# DW_AT_type
+	.uleb128 0x2	# (DIE (0x47) DW_TAG_subprogram)
+			# DW_AT_external
+	.uleb128 0x2	# DW_AT_name: "main"
+	.byte	0x1	# DW_AT_decl_file (testsuite/gdb.dwarf2/fission-loclists-pie.c)
+	.byte	0x1b	# DW_AT_decl_line
+			# DW_AT_prototyped
+	.long	0x3a	# DW_AT_type
+	.uleb128 0x4	# DW_AT_low_pc
+	.quad	.LFE1-.LFB1	# DW_AT_high_pc
+	.uleb128 0x1	# DW_AT_frame_base
+	.byte	0x9c	# DW_OP_call_frame_cfa
+			# DW_AT_GNU_all_call_sites
+	.long	0x84	# DW_AT_sibling
+	.uleb128 0x6	# (DIE (0x5e) DW_TAG_formal_parameter)
+	.uleb128 0x1	# DW_AT_name: "argc"
+	.byte	0x1	# DW_AT_decl_file (testsuite/gdb.dwarf2/fission-loclists-pie.c)
+	.byte	0x1b	# DW_AT_decl_line
+	.long	0x3a	# DW_AT_type
+	.long	.LLST0-.Ldebug_loc0	# DW_AT_location
+	.uleb128 0x6	# (DIE (0x6a) DW_TAG_formal_parameter)
+	.uleb128 0	# DW_AT_name: "argv"
+	.byte	0x1	# DW_AT_decl_file (testsuite/gdb.dwarf2/fission-loclists-pie.c)
+	.byte	0x1b	# DW_AT_decl_line
+	.long	0x84	# DW_AT_type
+	.long	.LLST1-.Ldebug_loc0	# DW_AT_location
+	.uleb128 0x7	# (DIE (0x76) DW_TAG_GNU_call_site)
+	.uleb128 0x2	# DW_AT_low_pc
+	.long	0x17	# DW_AT_abstract_origin
+	.uleb128 0x8	# (DIE (0x7c) DW_TAG_GNU_call_site_parameter)
+	.uleb128 0x1	# DW_AT_location
+	.byte	0x55	# DW_OP_reg5
+	.uleb128 0x2	# DW_AT_GNU_call_site_value
+	.byte	0x91	# DW_OP_fbreg
+	.sleb128 -12
+	.byte	0	# end of children of DIE 0x76
+	.byte	0	# end of children of DIE 0x47
+	.uleb128 0x5	# (DIE (0x84) DW_TAG_pointer_type)
+	.byte	0x8	# DW_AT_byte_size
+	.long	0x8a	# DW_AT_type
+	.uleb128 0x5	# (DIE (0x8a) DW_TAG_pointer_type)
+	.byte	0x8	# DW_AT_byte_size
+	.long	0x90	# DW_AT_type
+	.uleb128 0x9	# (DIE (0x90) DW_TAG_base_type)
+	.byte	0x1	# DW_AT_byte_size
+	.byte	0x6	# DW_AT_encoding
+	.uleb128 0x3	# DW_AT_name: "char"
+	.byte	0	# end of children of DIE 0xb
+	.section	.debug_info,"",@progbits
+.Lskeleton_debug_info0:
+	.long	0x30	# Length of Compilation Unit Info
+	.value	0x4	# DWARF version number
+	.long	.Lskeleton_debug_abbrev0	# Offset Into Abbrev. Section
+	.byte	0x8	# Pointer Size (in bytes)
+	.uleb128 0x1	# (DIE (0) DW_TAG_compile_unit)
+	.quad	.Ltext0	# DW_AT_low_pc
+	.quad	.Letext0-.Ltext0	# DW_AT_high_pc
+	.long	.Ldebug_line0	# DW_AT_stmt_list
+	.long	.LASF0	# DW_AT_GNU_dwo_name: "fission-loclists-pie.dwo"
+	.long	.LASF1	# DW_AT_comp_dir: "/tmp/19999/obj64/gdb/testsuite"
+			# DW_AT_GNU_pubnames
+	.long	.Ldebug_addr0	# DW_AT_GNU_addr_base
+	.byte	0xed	# DW_AT_GNU_dwo_id
+	.byte	0x50
+	.byte	0xa4
+	.byte	0xe0
+	.byte	0xc9
+	.byte	0xf8
+	.byte	0xd3
+	.byte	0xf0
+	.section	.debug_abbrev,"",@progbits
+.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 0x7	# (DW_FORM_data8)
+	.uleb128 0x10	# (DW_AT_stmt_list)
+	.uleb128 0x17	# (DW_FORM_sec_offset)
+	.uleb128 0x2130	# (DW_AT_GNU_dwo_name)
+	.uleb128 0xe	# (DW_FORM_strp)
+	.uleb128 0x1b	# (DW_AT_comp_dir)
+	.uleb128 0xe	# (DW_FORM_strp)
+	.uleb128 0x2134	# (DW_AT_GNU_pubnames)
+	.uleb128 0x19	# (DW_FORM_flag_present)
+	.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
+	.byte	0	# end of skeleton .debug_abbrev
+	.section	.debug_abbrev.dwo,"e",@progbits
+.Ldebug_abbrev0:
+	.uleb128 0x1	# (abbrev code)
+	.uleb128 0x11	# (TAG: DW_TAG_compile_unit)
+	.byte	0x1	# DW_children_yes
+	.uleb128 0x25	# (DW_AT_producer)
+	.uleb128 0x1f02	# (DW_FORM_GNU_str_index)
+	.uleb128 0x13	# (DW_AT_language)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0x1f02	# (DW_FORM_GNU_str_index)
+	.uleb128 0x2131	# (DW_AT_GNU_dwo_id)
+	.uleb128 0x7	# (DW_FORM_data8)
+	.byte	0
+	.byte	0
+	.uleb128 0x2	# (abbrev code)
+	.uleb128 0x2e	# (TAG: DW_TAG_subprogram)
+	.byte	0x1	# DW_children_yes
+	.uleb128 0x3f	# (DW_AT_external)
+	.uleb128 0x19	# (DW_FORM_flag_present)
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0x1f02	# (DW_FORM_GNU_str_index)
+	.uleb128 0x3a	# (DW_AT_decl_file)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3b	# (DW_AT_decl_line)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x27	# (DW_AT_prototyped)
+	.uleb128 0x19	# (DW_FORM_flag_present)
+	.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 0x7	# (DW_FORM_data8)
+	.uleb128 0x40	# (DW_AT_frame_base)
+	.uleb128 0x18	# (DW_FORM_exprloc)
+	.uleb128 0x2117	# (DW_AT_GNU_all_call_sites)
+	.uleb128 0x19	# (DW_FORM_flag_present)
+	.uleb128 0x1	# (DW_AT_sibling)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.byte	0
+	.byte	0
+	.uleb128 0x3	# (abbrev code)
+	.uleb128 0x5	# (TAG: DW_TAG_formal_parameter)
+	.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 0x2	# (DW_AT_location)
+	.uleb128 0x18	# (DW_FORM_exprloc)
+	.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 0xf	# (TAG: DW_TAG_pointer_type)
+	.byte	0	# DW_children_no
+	.uleb128 0xb	# (DW_AT_byte_size)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x49	# (DW_AT_type)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.byte	0
+	.byte	0
+	.uleb128 0x6	# (abbrev code)
+	.uleb128 0x5	# (TAG: DW_TAG_formal_parameter)
+	.byte	0	# DW_children_no
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0x1f02	# (DW_FORM_GNU_str_index)
+	.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 0x2	# (DW_AT_location)
+	.uleb128 0x17	# (DW_FORM_sec_offset)
+	.byte	0
+	.byte	0
+	.uleb128 0x7	# (abbrev code)
+	.uleb128 0x4109	# (TAG: DW_TAG_GNU_call_site)
+	.byte	0x1	# DW_children_yes
+	.uleb128 0x11	# (DW_AT_low_pc)
+	.uleb128 0x1f01	# (DW_FORM_GNU_addr_index)
+	.uleb128 0x31	# (DW_AT_abstract_origin)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.byte	0
+	.byte	0
+	.uleb128 0x8	# (abbrev code)
+	.uleb128 0x410a	# (TAG: DW_TAG_GNU_call_site_parameter)
+	.byte	0	# DW_children_no
+	.uleb128 0x2	# (DW_AT_location)
+	.uleb128 0x18	# (DW_FORM_exprloc)
+	.uleb128 0x2111	# (DW_AT_GNU_call_site_value)
+	.uleb128 0x18	# (DW_FORM_exprloc)
+	.byte	0
+	.byte	0
+	.uleb128 0x9	# (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 0x1f02	# (DW_FORM_GNU_str_index)
+	.byte	0
+	.byte	0
+	.byte	0
+	.section	.debug_loc.dwo,"e",@progbits
+.Ldebug_loc0:
+.LLST0:
+	.byte	0x3	# Location list start/length entry (*.LLST0)
+	.uleb128 0	# Location list range start index (*.LVL1)
+	.long	.LVL2-.LVL1	# Location list range length (*.LLST0)
+	.value	0x1	# Location expression size
+	.byte	0x55	# DW_OP_reg5
+	.byte	0x3	# Location list start/length entry (*.LLST0)
+	.uleb128 0x1	# Location list range start index (*.LVL2)
+	.long	.LFE1-.LVL2	# Location list range length (*.LLST0)
+	.value	0x4	# Location expression size
+	.byte	0xf3	# DW_OP_GNU_entry_value
+	.uleb128 0x1
+	.byte	0x55	# DW_OP_reg5
+	.byte	0x9f	# DW_OP_stack_value
+	.byte	0	# Location list terminator (*.LLST0)
+.LLST1:
+	.byte	0x3	# Location list start/length entry (*.LLST1)
+	.uleb128 0	# Location list range start index (*.LVL1)
+	.long	.LVL3-1-.LVL1	# Location list range length (*.LLST1)
+	.value	0x1	# Location expression size
+	.byte	0x54	# DW_OP_reg4
+	.byte	0x3	# Location list start/length entry (*.LLST1)
+	.uleb128 0x5	# Location list range start index (*.LVL3-1)
+	.long	.LFE1-.LVL3-1	# Location list range length (*.LLST1)
+	.value	0x4	# Location expression size
+	.byte	0xf3	# DW_OP_GNU_entry_value
+	.uleb128 0x1
+	.byte	0x54	# DW_OP_reg4
+	.byte	0x9f	# DW_OP_stack_value
+	.byte	0	# Location list terminator (*.LLST1)
+	.section	.debug_gnu_pubnames,"",@progbits
+	.long	0x22	# Pub Info Length
+	.value	0x2	# DWARF Version
+	.long	.Lskeleton_debug_info0	# Offset of Compilation Unit Info
+	.long	0x95	# Compilation Unit Length
+	.long	0x17	# DIE offset
+	.byte	0x30	# GDB-index flags
+	.ascii "init\0"	# external name
+	.long	0x47	# DIE offset
+	.byte	0x30	# GDB-index flags
+	.ascii "main\0"	# external name
+	.long	0
+	.section	.debug_gnu_pubtypes,"",@progbits
+	.long	0x21	# Pub Info Length
+	.value	0x2	# DWARF Version
+	.long	.Lskeleton_debug_info0	# Offset of Compilation Unit Info
+	.long	0x95	# Compilation Unit Length
+	.long	0x3a	# DIE offset
+	.byte	0x90	# GDB-index flags
+	.ascii "int\0"	# external name
+	.long	0x90	# DIE offset
+	.byte	0x90	# GDB-index flags
+	.ascii "char\0"	# external name
+	.long	0
+	.section	.debug_aranges,"",@progbits
+	.long	0x2c	# Length of Address Ranges Info
+	.value	0x2	# DWARF Version
+	.long	.Lskeleton_debug_info0	# Offset of Compilation Unit Info
+	.byte	0x8	# Size of Address
+	.byte	0	# Size of Segment Descriptor
+	.value	0	# Pad to 16 byte boundary
+	.value	0
+	.quad	.Ltext0	# Address
+	.quad	.Letext0-.Ltext0	# Length
+	.quad	0
+	.quad	0
+	.section	.debug_line,"",@progbits
+.Ldebug_line0:
+	.section	.debug_line.dwo,"e",@progbits
+.Lskeleton_debug_line0:
+	.long	.LELT0-.LSLT0	# Length of Source Line Info
+.LSLT0:
+	.value	0x4	# DWARF Version
+	.long	.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	0xf2	# Line Range Value (Special Opcodes)
+	.byte	0xd	# 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	# opcode: 0xa has 0 args
+	.byte	0	# opcode: 0xb has 0 args
+	.byte	0x1	# opcode: 0xc has 1 args
+	.ascii "testsuite/gdb.dwarf2\0"	# Directory Entry: 0x1
+	.byte	0	# End directory table
+	.ascii "fission-loclists-pie.c\0"	# File Entry: 0x1
+	.uleb128 0x1
+	.uleb128 0
+	.uleb128 0
+	.byte	0	# End file name table
+.LELTP0:
+.LELT0:
+	.section	.debug_str,"MS",@progbits,1
+.LASF1:
+	.string	"/tmp/19999/obj64/gdb/testsuite"
+.LASF0:
+	.string	"fission-loclists-pie.dwo"
+	.section	.debug_str_offsets.dwo,"e",@progbits
+	.long	0	# indexed string 0x0: argv
+	.long	0x5	# indexed string 0x1: argc
+	.long	0xa	# indexed string 0x2: main
+	.long	0xf	# indexed string 0x3: char
+	.long	0x14	# indexed string 0x4: GNU C 4.9.x -m64 -mtune=generic -march=x86-64 -gdwarf-4 -gsplit-dwarf -O1 -fPIE
+	.long	0x64	# indexed string 0x5: init
+	.long	0x69	# indexed string 0x6: testsuite/gdb.dwarf2/fission-loclists-pie.c
+	.section	.debug_str.dwo,"e",@progbits
+	.string	"argv"
+	.string	"argc"
+	.string	"main"
+	.string	"char"
+	.string	"GNU C 4.9.x -m64 -mtune=generic -march=x86-64 -gdwarf-4 -gsplit-dwarf -O1 -fPIE"
+	.string	"init"
+	.string	"testsuite/gdb.dwarf2/fission-loclists-pie.c"
+	.ident	"GCC: 4.9.x"
+	.section	.note.GNU-stack,"",@progbits
diff --git a/gdb-7.11/gdb/testsuite/gdb.dwarf2/fission-loclists-pie.exp b/gdb-7.11/gdb/testsuite/gdb.dwarf2/fission-loclists-pie.exp
new file mode 100644
index 000000000..f7d1af8e9
--- /dev/null
+++ b/gdb-7.11/gdb/testsuite/gdb.dwarf2/fission-loclists-pie.exp
@@ -0,0 +1,61 @@
+# Copyright 2016 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 testcase exercises PR symtab/19999.
+# For Fission, while we shouldn't add the DWARF base address to addresses
+# coming from .debug_addr, will still need to add the base offset in case
+# we're debugging a PIE executable.
+
+load_lib dwarf.exp
+
+# We run objcopy locally to split out the .dwo file.
+if [is_remote host] {
+    return 0
+}
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+if ![dwarf2_support] {
+    return 0
+}
+
+# This test can only be run on x86-64 targets.
+if {![istarget x86_64-*] || ![is_lp64_target]} {
+    return 0
+}
+
+standard_testfile .S
+
+if [build_executable_from_fission_assembler \
+	"$testfile.exp" "$binfile" "$srcfile" \
+	[list "nodebug" "ldflags=-pie"]] {
+    return -1
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+# Make sure we can find the .dwo file, regardless of whether we're
+# running in parallel mode.
+gdb_test_no_output "set debug-file-directory [file dirname $binfile]" \
+    "set debug-file-directory"
+gdb_load $binfile
+
+if ![runto_main] {
+    return -1
+}
+
+# Verify gdb can find argc.
+
+gdb_test "p argc" " = 1"
diff --git a/gdb-7.11/gdb/testsuite/lib/dwarf.exp b/gdb-7.11/gdb/testsuite/lib/dwarf.exp
index 4a02ab2a1..717cbb071 100644
--- a/gdb-7.11/gdb/testsuite/lib/dwarf.exp
+++ b/gdb-7.11/gdb/testsuite/lib/dwarf.exp
@@ -78,7 +78,7 @@ proc build_executable_from_fission_assembler { testname executable sources optio
 	return -1
     }
 
-    set result [gdb_compile $object_file $executable executable {nodebug}]
+    set result [gdb_compile $object_file $executable executable $options]
     if { "$result" != "" } {
 	return -1
     }