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gdb/gdb-entrydataoptimizedout.patch

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Fix crash on optimized-out entry data values (BZ 1111910).
2014-06-30 21:30:31 +00:00
http://sourceware.org/ml/gdb-patches/2014-06/msg00797.html
Subject: [patch+7.8] Fix crash on optimized-out entry data values
--jRHKVT23PllUwdXP
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Content-Disposition: inline
Hi,
https://bugzilla.redhat.com/show_bug.cgi?id=1111910
this can happen for real world -O2 -g executables:
#9 0x0000003b6e0998b2 in wxEntry (argc=@0x7fffffffd86c: 1,
argc@entry=@0x7fffffffd86c: <optimized out>,
^^^^^^^^^^^^^^^
argv=<optimized out>) at src/common/init.cpp:460
GDB did crash in such case.
No regressions on {x86_64,x86_64-m32}-fedorarawhide-linux-gnu.
Jan
--jRHKVT23PllUwdXP
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Content-Disposition: inline; filename="entrydataoptimizedout.patch"
gdb/
2014-06-22 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix crash on optimized-out entry data values.
* stack.c (read_frame_arg): Check value_optimized_out before calling
value_available_contents_eq.
* value.c (value_available_contents_bits_eq): Check OPTIMIZED_OUT for
VAL1 and VAL2.
* value.h (value_available_contents_eq): Mention optimized out values
in function comment.
gdb/testsuite/
2014-06-22 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix crash on optimized-out entry data values.
* gdb.arch/amd64-entry-value-paramref.S: New file.
* gdb.arch/amd64-entry-value-paramref.cc: New file.
* gdb.arch/amd64-entry-value-paramref.exp: New file.
diff --git a/gdb/stack.c b/gdb/stack.c
index 0d6d8e7..a0f3513 100644
--- a/gdb/stack.c
+++ b/gdb/stack.c
@@ -413,6 +413,7 @@ read_frame_arg (struct symbol *sym, struct frame_info *frame,
/* If the reference addresses match but dereferenced
content does not match print them. */
if (val != val_deref
+ && !value_optimized_out (entryval_deref)
&& value_available_contents_eq (val_deref, 0,
entryval_deref, 0,
TYPE_LENGTH (type_deref)))
diff --git a/gdb/value.c b/gdb/value.c
index 557056f..74b9d56 100644
--- a/gdb/value.c
+++ b/gdb/value.c
@@ -700,6 +700,8 @@ value_available_contents_bits_eq (const struct value *val1, int offset1,
/* See function description in value.h. */
gdb_assert (!val1->lazy && !val2->lazy);
+ gdb_assert (!val1->optimized_out);
+ gdb_assert (!val2->optimized_out);
while (length > 0)
{
diff --git a/gdb/value.h b/gdb/value.h
index c2e9faf..80a2225 100644
--- a/gdb/value.h
+++ b/gdb/value.h
@@ -499,7 +499,7 @@ extern void mark_value_bits_unavailable
read it. As this routine is used by printing routines, which may
be printing values in the value history, long after the inferior is
gone, it works with const values. Therefore, this routine must not
- be called with lazy values. */
+ be called with lazy or optimized_out values. */
extern int value_available_contents_eq (const struct value *val1, LONGEST offset1,
const struct value *val2, LONGEST offset2,
diff --git a/gdb/testsuite/gdb.arch/amd64-entry-value-paramref.S b/gdb/testsuite/gdb.arch/amd64-entry-value-paramref.S
new file mode 100644
index 0000000..6daee63
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/amd64-entry-value-paramref.S
@@ -0,0 +1,459 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2014 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 is compiled from gdb.arch/amd64-entry-value-paramref.cc
+ using -g -dA -S -O2.
+ Additionally it has been patched. */
+
+ .file "amd64-entry-value-paramref.cc"
+ .text
+.Ltext0:
+ .p2align 4,,15
+ .type _ZL3barRi.constprop.0, @function
+_ZL3barRi.constprop.0:
+.LFB2:
+ .file 1 "gdb.arch/amd64-entry-value-paramref.cc"
+ # gdb.arch/amd64-entry-value-paramref.cc:21
+ .loc 1 21 0
+ .cfi_startproc
+.LVL0:
+# BLOCK 2 freq:10000 seq:0
+# PRED: ENTRY [100.0%] (FALLTHRU)
+ # gdb.arch/amd64-entry-value-paramref.cc:23
+ .loc 1 23 0
+ movl vv(%rip), %eax
+ # gdb.arch/amd64-entry-value-paramref.cc:24
+ .loc 1 24 0
+ movq %rdi, p(%rip)
+ # gdb.arch/amd64-entry-value-paramref.cc:23
+ .loc 1 23 0
+ addl $1, %eax
+ movl %eax, vv(%rip)
+ # gdb.arch/amd64-entry-value-paramref.cc:25
+ .loc 1 25 0
+ movl (%rdi), %eax
+# SUCC: EXIT [100.0%]
+ # gdb.arch/amd64-entry-value-paramref.cc:26
+ .loc 1 26 0
+ ret
+ .cfi_endproc
+.LFE2:
+ .size _ZL3barRi.constprop.0, .-_ZL3barRi.constprop.0
+ .section .text.startup,"ax",@progbits
+ .p2align 4,,15
+ .globl main
+ .type main, @function
+main:
+.LFB1:
+ # gdb.arch/amd64-entry-value-paramref.cc:30
+ .loc 1 30 0
+ .cfi_startproc
+# BLOCK 2 freq:10000 seq:0
+# PRED: ENTRY [100.0%] (FALLTHRU)
+ subq $16, %rsp
+ .cfi_def_cfa_offset 24
+.LBB2:
+ # gdb.arch/amd64-entry-value-paramref.cc:32
+ .loc 1 32 0
+ leaq 12(%rsp), %rdi
+ # gdb.arch/amd64-entry-value-paramref.cc:31
+ .loc 1 31 0
+ movl $10, 12(%rsp)
+ # gdb.arch/amd64-entry-value-paramref.cc:32
+ .loc 1 32 0
+ call _ZL3barRi.constprop.0
+.LVL1:
+.LBE2:
+ # gdb.arch/amd64-entry-value-paramref.cc:33
+ .loc 1 33 0
+ addq $16, %rsp
+ .cfi_def_cfa_offset 8
+# SUCC: EXIT [100.0%]
+ ret
+ .cfi_endproc
+.LFE1:
+ .size main, .-main
+ .globl p
+ .bss
+ .align 8
+ .type p, @object
+ .size p, 8
+p:
+ .zero 8
+ .globl vv
+ .align 4
+ .type vv, @object
+ .size vv, 4
+vv:
+ .zero 4
+ .text
+.Letext0:
+ .section .debug_info,"",@progbits
+.Ldebug_info0:
+ .long .Linfo_end - .Linfo_start # Length of Compilation Unit Info
+.Linfo_start:
+ .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)
+ .long .LASF0 # DW_AT_producer: "GNU C++ 4.8.2 20131212 (Red Hat 4.8.2-7) -mtune=generic -march=x86-64 -g -O2"
+ .byte 0x4 # DW_AT_language
+ .long .LASF1 # DW_AT_name: "gdb.arch/amd64-entry-value-paramref.cc"
+ .long .LASF2 # DW_AT_comp_dir: ""
+ .long .Ldebug_ranges0+0 # DW_AT_ranges
+ .quad 0 # DW_AT_low_pc
+ .long .Ldebug_line0 # DW_AT_stmt_list
+DIE29: .uleb128 0x2 # (DIE (0x29) DW_TAG_subprogram)
+ .ascii "bar\0" # DW_AT_name
+ .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-entry-value-paramref.cc)
+ .byte 0x15 # DW_AT_decl_line
+ .long DIE45 # DW_AT_type
+ .byte 0x1 # DW_AT_inline
+DIE39: .uleb128 0x3 # (DIE (0x39) DW_TAG_formal_parameter)
+ .ascii "ref\0" # DW_AT_name
+ .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-entry-value-paramref.cc)
+ .byte 0x15 # DW_AT_decl_line
+ .long DIE4c # DW_AT_type
+ .byte 0 # end of children of DIE 0x29
+DIE45: .uleb128 0x4 # (DIE (0x45) DW_TAG_base_type)
+ .byte 0x4 # DW_AT_byte_size
+ .byte 0x5 # DW_AT_encoding
+ .ascii "int\0" # DW_AT_name
+DIE4c: .uleb128 0x5 # (DIE (0x4c) DW_TAG_const_type)
+ .long DIE51 # DW_AT_type
+DIE51: .uleb128 0x6 # (DIE (0x51) DW_TAG_reference_type)
+ .byte 0x8 # DW_AT_byte_size
+ .long DIE45 # DW_AT_type
+DIE57: .uleb128 0x7 # (DIE (0x57) DW_TAG_subprogram)
+ .long DIE29 # DW_AT_abstract_origin
+ .quad .LFB2 # DW_AT_low_pc
+ .quad .LFE2-.LFB2 # DW_AT_high_pc
+ .uleb128 0x1 # DW_AT_frame_base
+ .byte 0x9c # DW_OP_call_frame_cfa
+ # DW_AT_GNU_all_call_sites
+DIE72: .uleb128 0x8 # (DIE (0x72) DW_TAG_formal_parameter)
+ .long DIE39 # DW_AT_abstract_origin
+ .uleb128 0x1 # DW_AT_location
+ .byte 0x55 # DW_OP_reg5
+ .byte 0 # end of children of DIE 0x57
+DIE7a: .uleb128 0x9 # (DIE (0x7a) DW_TAG_subprogram)
+ # DW_AT_external
+ .long .LASF3 # DW_AT_name: "main"
+ .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-entry-value-paramref.cc)
+ .byte 0x1d # DW_AT_decl_line
+ .long DIE45 # DW_AT_type
+ .quad .LFB1 # 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
+DIE9b: .uleb128 0xa # (DIE (0x9b) DW_TAG_lexical_block)
+ .quad .LBB2 # DW_AT_low_pc
+ .quad .LBE2-.LBB2 # DW_AT_high_pc
+DIEac: .uleb128 0xb # (DIE (0xac) DW_TAG_variable)
+ .ascii "var\0" # DW_AT_name
+ .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-entry-value-paramref.cc)
+ .byte 0x1f # DW_AT_decl_line
+ .long DIE45 # DW_AT_type
+ .uleb128 0x2 # DW_AT_location
+ .byte 0x91 # DW_OP_fbreg
+ .sleb128 -12
+DIEba: .uleb128 0xc # (DIE (0xba) DW_TAG_GNU_call_site)
+ .quad .LVL1 # DW_AT_low_pc
+ .long DIE57 # DW_AT_abstract_origin
+DIEc7: .uleb128 0xd # (DIE (0xc7) 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
+#if 0
+ .uleb128 0x1 # DW_AT_GNU_call_site_data_value
+ .byte 0x3a # DW_OP_lit10
+#else
+ .uleb128 1f - 2f # DW_AT_GNU_call_site_data_value
+2:
+ .byte 0xf3 # DW_OP_GNU_entry_value
+ .uleb128 1f - 3f
+3:
+ .byte 0x55 # DW_OP_reg5
+1:
+#endif
+ .byte 0 # end of children of DIE 0xba
+ .byte 0 # end of children of DIE 0x9b
+ .byte 0 # end of children of DIE 0x7a
+DIEd2: .uleb128 0xe # (DIE (0xd2) DW_TAG_variable)
+ .ascii "vv\0" # DW_AT_name
+ .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-entry-value-paramref.cc)
+ .byte 0x12 # DW_AT_decl_line
+ .long DIEe6 # DW_AT_type
+ # DW_AT_external
+ .uleb128 0x9 # DW_AT_location
+ .byte 0x3 # DW_OP_addr
+ .quad vv
+DIEe6: .uleb128 0xf # (DIE (0xe6) DW_TAG_volatile_type)
+ .long DIE45 # DW_AT_type
+DIEeb: .uleb128 0xe # (DIE (0xeb) DW_TAG_variable)
+ .ascii "p\0" # DW_AT_name
+ .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-entry-value-paramref.cc)
+ .byte 0x12 # DW_AT_decl_line
+ .long DIEfe # DW_AT_type
+ # DW_AT_external
+ .uleb128 0x9 # DW_AT_location
+ .byte 0x3 # DW_OP_addr
+ .quad p
+DIEfe: .uleb128 0x10 # (DIE (0xfe) DW_TAG_pointer_type)
+ .byte 0x8 # DW_AT_byte_size
+ .long DIEe6 # DW_AT_type
+ .byte 0 # end of children of DIE 0xb
+.Linfo_end:
+ .section .debug_abbrev,"",@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 0xe # (DW_FORM_strp)
+ .uleb128 0x13 # (DW_AT_language)
+ .uleb128 0xb # (DW_FORM_data1)
+ .uleb128 0x3 # (DW_AT_name)
+ .uleb128 0xe # (DW_FORM_strp)
+ .uleb128 0x1b # (DW_AT_comp_dir)
+ .uleb128 0xe # (DW_FORM_strp)
+ .uleb128 0x55 # (DW_AT_ranges)
+ .uleb128 0x17 # (DW_FORM_sec_offset)
+ .uleb128 0x11 # (DW_AT_low_pc)
+ .uleb128 0x1 # (DW_FORM_addr)
+ .uleb128 0x10 # (DW_AT_stmt_list)
+ .uleb128 0x17 # (DW_FORM_sec_offset)
+ .byte 0
+ .byte 0
+ .uleb128 0x2 # (abbrev code)
+ .uleb128 0x2e # (TAG: DW_TAG_subprogram)
+ .byte 0x1 # DW_children_yes
+ .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 0x20 # (DW_AT_inline)
+ .uleb128 0xb # (DW_FORM_data1)
+ .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)
+ .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 0x26 # (TAG: DW_TAG_const_type)
+ .byte 0 # DW_children_no
+ .uleb128 0x49 # (DW_AT_type)
+ .uleb128 0x13 # (DW_FORM_ref4)
+ .byte 0
+ .byte 0
+ .uleb128 0x6 # (abbrev code)
+ .uleb128 0x10 # (TAG: DW_TAG_reference_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 0x7 # (abbrev code)
+ .uleb128 0x2e # (TAG: DW_TAG_subprogram)
+ .byte 0x1 # DW_children_yes
+ .uleb128 0x31 # (DW_AT_abstract_origin)
+ .uleb128 0x13 # (DW_FORM_ref4)
+ .uleb128 0x11 # (DW_AT_low_pc)
+ .uleb128 0x1 # (DW_FORM_addr)
+ .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)
+ .byte 0
+ .byte 0
+ .uleb128 0x8 # (abbrev code)
+ .uleb128 0x5 # (TAG: DW_TAG_formal_parameter)
+ .byte 0 # DW_children_no
+ .uleb128 0x31 # (DW_AT_abstract_origin)
+ .uleb128 0x13 # (DW_FORM_ref4)
+ .uleb128 0x2 # (DW_AT_location)
+ .uleb128 0x18 # (DW_FORM_exprloc)
+ .byte 0
+ .byte 0
+ .uleb128 0x9 # (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 0xe # (DW_FORM_strp)
+ .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 0x1 # (DW_FORM_addr)
+ .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)
+ .byte 0
+ .byte 0
+ .uleb128 0xa # (abbrev code)
+ .uleb128 0xb # (TAG: DW_TAG_lexical_block)
+ .byte 0x1 # DW_children_yes
+ .uleb128 0x11 # (DW_AT_low_pc)
+ .uleb128 0x1 # (DW_FORM_addr)
+ .uleb128 0x12 # (DW_AT_high_pc)
+ .uleb128 0x7 # (DW_FORM_data8)
+ .byte 0
+ .byte 0
+ .uleb128 0xb # (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 0x13 # (DW_FORM_ref4)
+ .uleb128 0x2 # (DW_AT_location)
+ .uleb128 0x18 # (DW_FORM_exprloc)
+ .byte 0
+ .byte 0
+ .uleb128 0xc # (abbrev code)
+ .uleb128 0x4109 # (TAG: DW_TAG_GNU_call_site)
+ .byte 0x1 # DW_children_yes
+ .uleb128 0x11 # (DW_AT_low_pc)
+ .uleb128 0x1 # (DW_FORM_addr)
+ .uleb128 0x31 # (DW_AT_abstract_origin)
+ .uleb128 0x13 # (DW_FORM_ref4)
+ .byte 0
+ .byte 0
+ .uleb128 0xd # (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)
+ .uleb128 0x2112 # (DW_AT_GNU_call_site_data_value)
+ .uleb128 0x18 # (DW_FORM_exprloc)
+ .byte 0
+ .byte 0
+ .uleb128 0xe # (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 0x13 # (DW_FORM_ref4)
+ .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
+ .uleb128 0xf # (abbrev code)
+ .uleb128 0x35 # (TAG: DW_TAG_volatile_type)
+ .byte 0 # DW_children_no
+ .uleb128 0x49 # (DW_AT_type)
+ .uleb128 0x13 # (DW_FORM_ref4)
+ .byte 0
+ .byte 0
+ .uleb128 0x10 # (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
+ .byte 0
+ .section .debug_aranges,"",@progbits
+ .long 0x3c # Length of Address Ranges Info
+ .value 0x2 # DWARF Version
+ .long .Ldebug_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 .LFB1 # Address
+ .quad .LFE1-.LFB1 # Length
+ .quad 0
+ .quad 0
+ .section .debug_ranges,"",@progbits
+.Ldebug_ranges0:
+ .quad .Ltext0 # Offset 0
+ .quad .Letext0
+ .quad .LFB1 # Offset 0x10
+ .quad .LFE1
+ .quad 0
+ .quad 0
+ .section .debug_line,"",@progbits
+.Ldebug_line0:
+ .section .debug_str,"MS",@progbits,1
+.LASF1:
+ .string "gdb.arch/amd64-entry-value-paramref.cc"
+.LASF2:
+ .string ""
+.LASF0:
+ .string "GNU C++ 4.8.2 20131212 (Red Hat 4.8.2-7) -mtune=generic -march=x86-64 -g -O2"
+.LASF3:
+ .string "main"
+ .ident "GCC: (GNU) 4.8.2 20131212 (Red Hat 4.8.2-7)"
+ .section .note.GNU-stack,"",@progbits
diff --git a/gdb/testsuite/gdb.arch/amd64-entry-value-paramref.cc b/gdb/testsuite/gdb.arch/amd64-entry-value-paramref.cc
new file mode 100644
index 0000000..e3a28de
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/amd64-entry-value-paramref.cc
@@ -0,0 +1,33 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2014 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/>. */
+
+volatile int vv, *p;
+
+static __attribute__((noinline)) int
+bar (int &ref)
+{
+ vv++; /* break-here */
+ p = &ref;
+ return ref;
+}
+
+int
+main (void)
+{
+ int var = 10;
+ return bar (var);
+}
diff --git a/gdb/testsuite/gdb.arch/amd64-entry-value-paramref.exp b/gdb/testsuite/gdb.arch/amd64-entry-value-paramref.exp
new file mode 100644
index 0000000..f06247d
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/amd64-entry-value-paramref.exp
@@ -0,0 +1,35 @@
+# Copyright (C) 2014 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/>.
+
+standard_testfile .S .cc
+
+if { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
+ verbose "Skipping amd64-entry-value-paramref."
+ return
+}
+
+if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} "c++"] } {
+ return -1
+}
+
+if ![runto_main] {
+ return -1
+}
+
+set srcfile $srcfile2
+gdb_breakpoint [gdb_get_line_number "break-here"]
+
+gdb_continue_to_breakpoint "break-here" ".* break-here .*"
+gdb_test "frame" {bar \(ref=@0x[0-9a-f]+: 10, ref@entry=@0x[0-9a-f]+: <optimized out>\) at .*}
--jRHKVT23PllUwdXP--
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