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old-cross-binutils/gdb/testsuite/gdb.dwarf2/dw2-undefined-ret-addr.S

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ArmAsm
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Fix "info frame" in the outermost frame. Doing "info frame" in the outermost frame, when that was indicated by the next frame saying the unwound PC is undefined/not saved, results in error and incomplete output: (gdb) bt #0 thread_function0 (arg=0x0) at threads.c:63 #1 0x00000034cf407d14 in start_thread (arg=0x7ffff7fcb700) at pthread_create.c:309 #2 0x000000323d4f168d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115 (gdb) frame 2 #2 0x000000323d4f168d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115 115 call *%rax (gdb) info frame Stack level 2, frame at 0x0: rip = 0x323d4f168d in clone (../sysdeps/unix/sysv/linux/x86_64/clone.S:115); saved rip Register 16 was not saved (gdb) Not saved register values are treated as optimized out values internally throughout. stack.c:frame_info is handing unvailable values, but not optimized out ones. The patch deletes the frame_unwind_caller_pc_if_available wrapper function and instead lets errors propagate to frame_info (it's only user). As frame_unwind_pc now needs to be able to handle and cache two different error scenarios, the prev_pc.p variable is replaced with an enumeration. (FWIW, I looked into making gdbarch_unwind_pc or a variant return struct value's instead, but it results in lots of boxing and unboxing for no real gain -- e.g., the mips and arm implementations need to do computation on the unboxed PC value. Might as well throw an error on first attempt to get at invalid contents.) After the patch, we get: (gdb) info frame Stack level 2, frame at 0x0: rip = 0x323d4f168d in clone (../sysdeps/unix/sysv/linux/x86_64/clone.S:115); saved rip = <not saved> Outermost frame: outermost caller of frame at 0x7ffff7fcafc0 source language asm. Arglist at 0x7ffff7fcafb8, args: Locals at 0x7ffff7fcafb8, Previous frame's sp is 0x7ffff7fcafc8 (gdb) A new test is added. It's based off dw2-reg-undefined.exp, and tweaked to mark the return address (rip) of "stop_frame" as undefined. Tested on x86_64 Fedora 17. gdb/ 2013-12-06 Pedro Alves <palves@redhat.com> * frame.c (enum cached_copy_status): New enum. (struct frame_info) <prev_pc.p>: Change type to enum cached_copy_status. (fprint_frame): Handle not saved and unavailable prev_pc values. (frame_unwind_pc_if_available): Delete and merge contents into ... (frame_unwind_pc): ... here. Handle OPTIMIZED_OUT_ERROR. Adjust to use enum cached_copy_status. (frame_unwind_caller_pc_if_available): Delete. (create_new_frame): Adjust. * frame.h (frame_unwind_caller_pc_if_available): Delete declaration. * stack.c (frame_info): Use frame_unwind_caller_pc instead of frame_unwind_caller_pc_if_available, and handle NOT_AVAILABLE_ERROR and OPTIMIZED_OUT_ERROR errors. * valprint.c (val_print_optimized_out): Use val_print_not_saved. (val_print_not_saved): New function. * valprint.h (val_print_not_saved): Declare. gdb/testsuite/ 2013-12-06 Pedro Alves <palves@redhat.com> * gdb.dwarf2/dw2-undefined-ret-addr.S: New file. * gdb.dwarf2/dw2-undefined-ret-addr.c: New file. * gdb.dwarf2/dw2-undefined-ret-addr.exp: New file.
2013-12-06 19:48:00 +00:00
/*
Copyright 2013 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/>. */
/* The FDE entry for "stop_frame" in the .debug_frame section has
been hand modified to mark the return address (rip) as undefined.
Otherwise this file is as generated by gcc 4.7.2 for x86_64. */
.file "dw2-undefined-ret-addr.c"
.text
.Ltext0:
.globl stop_frame
.type stop_frame, @function
stop_frame:
.LFB0:
.file 1 "dw2-undefined-ret-addr.c"
.loc 1 19 0
pushq %rbp
.LCFI0:
movq %rsp, %rbp
.LCFI1:
.loc 1 22 0
popq %rbp
.LCFI2:
ret
.LFE0:
.size stop_frame, .-stop_frame
.globl first_frame
.type first_frame, @function
first_frame:
.LFB1:
.loc 1 26 0
pushq %rbp
.LCFI3:
movq %rsp, %rbp
.LCFI4:
.loc 1 27 0
movl $0, %eax
call stop_frame
.loc 1 28 0
popq %rbp
.LCFI5:
ret
.LFE1:
.size first_frame, .-first_frame
.globl main
.type main, @function
main:
.LFB2:
.loc 1 32 0
pushq %rbp
.LCFI6:
movq %rsp, %rbp
.LCFI7:
.loc 1 33 0
movl $0, %eax
call first_frame
.loc 1 35 0
movl $0, %eax
.loc 1 36 0
popq %rbp
.LCFI8:
ret
.LFE2:
.size main, .-main
.section .debug_frame,"",@progbits
.Lframe0:
.long .LECIE0-.LSCIE0
.LSCIE0:
.long 0xffffffff
.byte 0x1
.string ""
.uleb128 0x1
.sleb128 -8
.byte 0x10
.byte 0xc
.uleb128 0x7
.uleb128 0x8
.byte 0x90
.uleb128 0x1
.align 8
.LECIE0:
/* This FDE entry, for stop_frame was modified to mark
registers 0 -> 6 as being undefined. */
.LSFDE0:
.long .LEFDE0-.LASFDE0
.LASFDE0:
.long .Lframe0
.quad .LFB0
.quad .LFE0-.LFB0
/* START OF NEW CONTENT. */
.byte 0x7 /* DW_CFA_undefined */
.uleb128 0x10 /* ULEB128 register */
/* END OF NEW CONTENT. */
.byte 0x4
.long .LCFI0-.LFB0
.byte 0xe
.uleb128 0x10
.byte 0x86
.uleb128 0x2
.byte 0x4
.long .LCFI1-.LCFI0
.byte 0xd
.uleb128 0x6
.byte 0x4
.long .LCFI2-.LCFI1
.byte 0xc
.uleb128 0x7
.uleb128 0x8
.align 8
.LEFDE0:
.LSFDE2:
.long .LEFDE2-.LASFDE2
.LASFDE2:
.long .Lframe0
.quad .LFB1
.quad .LFE1-.LFB1
.byte 0x4
.long .LCFI3-.LFB1
.byte 0xe
.uleb128 0x10
.byte 0x86
.uleb128 0x2
.byte 0x4
.long .LCFI4-.LCFI3
.byte 0xd
.uleb128 0x6
.byte 0x4
.long .LCFI5-.LCFI4
.byte 0xc
.uleb128 0x7
.uleb128 0x8
.align 8
.LEFDE2:
.LSFDE4:
.long .LEFDE4-.LASFDE4
.LASFDE4:
.long .Lframe0
.quad .LFB2
.quad .LFE2-.LFB2
.byte 0x4
.long .LCFI6-.LFB2
.byte 0xe
.uleb128 0x10
.byte 0x86
.uleb128 0x2
.byte 0x4
.long .LCFI7-.LCFI6
.byte 0xd
.uleb128 0x6
.byte 0x4
.long .LCFI8-.LCFI7
.byte 0xc
.uleb128 0x7
.uleb128 0x8
.align 8
.LEFDE4:
.section .eh_frame,"a",@progbits
.Lframe1:
.long .LECIE1-.LSCIE1
.LSCIE1:
.long 0
.byte 0x1
.string "zR"
.uleb128 0x1
.sleb128 -8
.byte 0x10
.uleb128 0x1
.byte 0x3
.byte 0xc
.uleb128 0x7
.uleb128 0x8
.byte 0x90
.uleb128 0x1
.align 8
.LECIE1:
.LSFDE7:
.long .LEFDE7-.LASFDE7
.LASFDE7:
.long .LASFDE7-.Lframe1
.long .LFB0
.long .LFE0-.LFB0
.uleb128 0
.byte 0x4
.long .LCFI0-.LFB0
.byte 0xe
.uleb128 0x10
.byte 0x86
.uleb128 0x2
.byte 0x4
.long .LCFI1-.LCFI0
.byte 0xd
.uleb128 0x6
.byte 0x4
.long .LCFI2-.LCFI1
.byte 0xc
.uleb128 0x7
.uleb128 0x8
.align 8
.LEFDE7:
.LSFDE9:
.long .LEFDE9-.LASFDE9
.LASFDE9:
.long .LASFDE9-.Lframe1
.long .LFB1
.long .LFE1-.LFB1
.uleb128 0
.byte 0x4
.long .LCFI3-.LFB1
.byte 0xe
.uleb128 0x10
.byte 0x86
.uleb128 0x2
.byte 0x4
.long .LCFI4-.LCFI3
.byte 0xd
.uleb128 0x6
.byte 0x4
.long .LCFI5-.LCFI4
.byte 0xc
.uleb128 0x7
.uleb128 0x8
.align 8
.LEFDE9:
.LSFDE11:
.long .LEFDE11-.LASFDE11
.LASFDE11:
.long .LASFDE11-.Lframe1
.long .LFB2
.long .LFE2-.LFB2
.uleb128 0
.byte 0x4
.long .LCFI6-.LFB2
.byte 0xe
.uleb128 0x10
.byte 0x86
.uleb128 0x2
.byte 0x4
.long .LCFI7-.LCFI6
.byte 0xd
.uleb128 0x6
.byte 0x4
.long .LCFI8-.LCFI7
.byte 0xc
.uleb128 0x7
.uleb128 0x8
.align 8
.LEFDE11:
.text
.Letext0:
.section .debug_info,"",@progbits
.Ldebug_info0:
.long 0x8c
.value 0x2
.long .Ldebug_abbrev0
.byte 0x8
.uleb128 0x1
.long .LASF2
.byte 0x1
.long .LASF3
.long .LASF4
.quad .Ltext0
.quad .Letext0
.long .Ldebug_line0
.uleb128 0x2
.byte 0x1
.long .LASF0
.byte 0x1
.byte 0x12
.quad .LFB0
.quad .LFE0
.long .LLST0
.byte 0x1
.uleb128 0x3
.byte 0x1
.long .LASF1
.byte 0x1
.byte 0x19
.quad .LFB1
.quad .LFE1
.long .LLST1
.byte 0x1
.uleb128 0x4
.byte 0x1
.long .LASF5
.byte 0x1
.byte 0x1f
.long 0x88
.quad .LFB2
.quad .LFE2
.long .LLST2
.byte 0x1
.uleb128 0x5
.byte 0x4
.byte 0x5
.string "int"
.byte 0
.section .debug_abbrev,"",@progbits
.Ldebug_abbrev0:
.uleb128 0x1
.uleb128 0x11
.byte 0x1
.uleb128 0x25
.uleb128 0xe
.uleb128 0x13
.uleb128 0xb
.uleb128 0x3
.uleb128 0xe
.uleb128 0x1b
.uleb128 0xe
.uleb128 0x11
.uleb128 0x1
.uleb128 0x12
.uleb128 0x1
.uleb128 0x10
.uleb128 0x6
.byte 0
.byte 0
.uleb128 0x2
.uleb128 0x2e
.byte 0
.uleb128 0x3f
.uleb128 0xc
.uleb128 0x3
.uleb128 0xe
.uleb128 0x3a
.uleb128 0xb
.uleb128 0x3b
.uleb128 0xb
.uleb128 0x11
.uleb128 0x1
.uleb128 0x12
.uleb128 0x1
.uleb128 0x40
.uleb128 0x6
.uleb128 0x2117
.uleb128 0xc
.byte 0
.byte 0
.uleb128 0x3
.uleb128 0x2e
.byte 0
.uleb128 0x3f
.uleb128 0xc
.uleb128 0x3
.uleb128 0xe
.uleb128 0x3a
.uleb128 0xb
.uleb128 0x3b
.uleb128 0xb
.uleb128 0x11
.uleb128 0x1
.uleb128 0x12
.uleb128 0x1
.uleb128 0x40
.uleb128 0x6
.uleb128 0x2116
.uleb128 0xc
.byte 0
.byte 0
.uleb128 0x4
.uleb128 0x2e
.byte 0
.uleb128 0x3f
.uleb128 0xc
.uleb128 0x3
.uleb128 0xe
.uleb128 0x3a
.uleb128 0xb
.uleb128 0x3b
.uleb128 0xb
.uleb128 0x49
.uleb128 0x13
.uleb128 0x11
.uleb128 0x1
.uleb128 0x12
.uleb128 0x1
.uleb128 0x40
.uleb128 0x6
.uleb128 0x2116
.uleb128 0xc
.byte 0
.byte 0
.uleb128 0x5
.uleb128 0x24
.byte 0
.uleb128 0xb
.uleb128 0xb
.uleb128 0x3e
.uleb128 0xb
.uleb128 0x3
.uleb128 0x8
.byte 0
.byte 0
.byte 0
.section .debug_loc,"",@progbits
.Ldebug_loc0:
.LLST0:
.quad .LFB0-.Ltext0
.quad .LCFI0-.Ltext0
.value 0x2
.byte 0x77
.sleb128 8
.quad .LCFI0-.Ltext0
.quad .LCFI1-.Ltext0
.value 0x2
.byte 0x77
.sleb128 16
.quad .LCFI1-.Ltext0
.quad .LCFI2-.Ltext0
.value 0x2
.byte 0x76
.sleb128 16
.quad .LCFI2-.Ltext0
.quad .LFE0-.Ltext0
.value 0x2
.byte 0x77
.sleb128 8
.quad 0
.quad 0
.LLST1:
.quad .LFB1-.Ltext0
.quad .LCFI3-.Ltext0
.value 0x2
.byte 0x77
.sleb128 8
.quad .LCFI3-.Ltext0
.quad .LCFI4-.Ltext0
.value 0x2
.byte 0x77
.sleb128 16
.quad .LCFI4-.Ltext0
.quad .LCFI5-.Ltext0
.value 0x2
.byte 0x76
.sleb128 16
.quad .LCFI5-.Ltext0
.quad .LFE1-.Ltext0
.value 0x2
.byte 0x77
.sleb128 8
.quad 0
.quad 0
.LLST2:
.quad .LFB2-.Ltext0
.quad .LCFI6-.Ltext0
.value 0x2
.byte 0x77
.sleb128 8
.quad .LCFI6-.Ltext0
.quad .LCFI7-.Ltext0
.value 0x2
.byte 0x77
.sleb128 16
.quad .LCFI7-.Ltext0
.quad .LCFI8-.Ltext0
.value 0x2
.byte 0x76
.sleb128 16
.quad .LCFI8-.Ltext0
.quad .LFE2-.Ltext0
.value 0x2
.byte 0x77
.sleb128 8
.quad 0
.quad 0
.section .debug_aranges,"",@progbits
.long 0x2c
.value 0x2
.long .Ldebug_info0
.byte 0x8
.byte 0
.value 0
.value 0
.quad .Ltext0
.quad .Letext0-.Ltext0
.quad 0
.quad 0
.section .debug_line,"",@progbits
.Ldebug_line0:
.section .debug_str,"MS",@progbits,1
.LASF0:
.string "stop_frame"
.LASF3:
.string "dw2-undefined-ret-addr.c"
.LASF2:
.string "GNU C 4.7.2"
.LASF1:
.string "first_frame"
.LASF5:
.string "main"
.LASF4:
.string "/home/username/src/gdb/testsuite/gdb.dwarf2"
.ident "GCC: (GNU) 4.7.2"
.section .note.GNU-stack,"",@progbits
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