Revert "Don't let two frames with the same id end up in the frame chain."
This reverts commit be2c48b4d5.
This commit is contained in:
Pedro Alves
parent
c8381c86b4
commit
8ad6489081
43
gdb/frame.c
43
gdb/frame.c
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@ -1666,7 +1666,6 @@ get_prev_frame_1 (struct frame_info *this_frame)
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{
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struct frame_id this_id;
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struct gdbarch *gdbarch;
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struct frame_info *prev_frame;
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gdb_assert (this_frame != NULL);
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gdbarch = get_frame_arch (this_frame);
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@ -1768,6 +1767,22 @@ get_prev_frame_1 (struct frame_info *this_frame)
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}
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}
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/* Check that this and the next frame are not identical. If they
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are, there is most likely a stack cycle. As with the inner-than
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test above, avoid comparing the inner-most and sentinel frames. */
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if (this_frame->level > 0
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&& frame_id_eq (this_id, get_frame_id (this_frame->next)))
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{
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if (frame_debug)
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{
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fprintf_unfiltered (gdb_stdlog, "-> ");
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fprint_frame (gdb_stdlog, NULL);
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fprintf_unfiltered (gdb_stdlog, " // this frame has same ID }\n");
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}
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this_frame->stop_reason = UNWIND_SAME_ID;
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return NULL;
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}
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/* Check that this and the next frame do not unwind the PC register
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to the same memory location. If they do, then even though they
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have different frame IDs, the new frame will be bogus; two
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@ -1815,31 +1830,7 @@ get_prev_frame_1 (struct frame_info *this_frame)
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}
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}
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prev_frame = get_prev_frame_raw (this_frame);
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/* Check that this and the prev frame are not identical. If they
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are, there is most likely a stack cycle. Unlike the tests above,
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we do this right after creating the prev frame, to avoid ever
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ending up with two frames with the same id in the frame
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chain. */
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if (prev_frame != NULL
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&& frame_id_eq (get_frame_id (prev_frame),
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get_frame_id (this_frame)))
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{
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if (frame_debug)
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{
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fprintf_unfiltered (gdb_stdlog, "-> ");
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fprint_frame (gdb_stdlog, NULL);
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fprintf_unfiltered (gdb_stdlog, " // this frame has same ID }\n");
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}
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this_frame->stop_reason = UNWIND_SAME_ID;
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/* Unlink. */
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prev_frame->next = NULL;
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this_frame->prev = NULL;
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return NULL;
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}
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return prev_frame;
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return get_prev_frame_raw (this_frame);
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}
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/* Construct a new "struct frame_info" and link it previous to
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@ -1,540 +0,0 @@
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/*
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Copyright 2013 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* The FDE entry for "stop_frame" in the .debug_frame section has
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been hand modified to mark a set of registers as DW_CFA_same_value.
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Otherwise this file is as generated by gcc 4.7.2 for x86_64. */
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.file "dw2-dup-frame.c"
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.text
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.Ltext0:
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.globl stop_frame
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.type stop_frame, @function
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stop_frame:
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.LFB0:
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.file 1 "dw2-dup-frame.c"
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.loc 1 19 0
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pushq %rbp
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.LCFI0:
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movq %rsp, %rbp
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.LCFI1:
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.loc 1 22 0
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popq %rbp
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.LCFI2:
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ret
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.LFE0:
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.size stop_frame, .-stop_frame
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.globl first_frame
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.type first_frame, @function
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first_frame:
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.LFB1:
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.loc 1 26 0
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pushq %rbp
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.LCFI3:
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movq %rsp, %rbp
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.LCFI4:
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.loc 1 27 0
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movl $0, %eax
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call stop_frame
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.loc 1 28 0
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popq %rbp
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.LCFI5:
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ret
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.LFE1:
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.size first_frame, .-first_frame
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.globl main
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.type main, @function
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main:
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.LFB2:
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.loc 1 32 0
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pushq %rbp
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.LCFI6:
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movq %rsp, %rbp
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.LCFI7:
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.loc 1 33 0
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movl $0, %eax
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call first_frame
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.loc 1 35 0
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movl $0, %eax
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.loc 1 36 0
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popq %rbp
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.LCFI8:
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ret
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.LFE2:
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.size main, .-main
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.section .debug_frame,"",@progbits
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.Lframe0:
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.long .LECIE0-.LSCIE0
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.LSCIE0:
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.long 0xffffffff
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.byte 0x1
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.string ""
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.uleb128 0x1
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.sleb128 -8
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.byte 0x10
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.byte 0xc
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.uleb128 0x7
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.uleb128 0x8
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.byte 0x90
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.uleb128 0x1
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.align 8
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.LECIE0:
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/* This FDE entry, for stop_frame was modified to mark
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registers 0 -> 16 (rax..ra/rip) as being DW_CFA_same_value. */
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.LSFDE0:
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.long .LEFDE0-.LASFDE0
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.LASFDE0:
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.long .Lframe0
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.quad .LFB0
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.quad .LFE0-.LFB0
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/* START OF NEW CONTENT. */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0x0 /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0x1 /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0x2 /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0x3 /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0x4 /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0x5 /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0x6 /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0x7 /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0x8 /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0x9 /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0xa /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0xb /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0xc /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0xd /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0xe /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0xf /* ULEB128 register */
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.byte 0x8 /* DW_CFA_same_value */
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.uleb128 0x10 /* ULEB128 register */
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/* END OF NEW CONTENT. */
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.byte 0x4
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.long .LCFI0-.LFB0
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.byte 0xe
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.uleb128 0x10
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.byte 0x86
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.uleb128 0x2
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.byte 0x4
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.long .LCFI1-.LCFI0
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.byte 0xd
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.uleb128 0x6
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.byte 0x4
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.long .LCFI2-.LCFI1
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.byte 0xc
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.uleb128 0x7
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.uleb128 0x8
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.align 8
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.LEFDE0:
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.LSFDE2:
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.long .LEFDE2-.LASFDE2
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.LASFDE2:
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.long .Lframe0
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.quad .LFB1
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.quad .LFE1-.LFB1
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.byte 0x4
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.long .LCFI3-.LFB1
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.byte 0xe
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.uleb128 0x10
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.byte 0x86
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.uleb128 0x2
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.byte 0x4
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.long .LCFI4-.LCFI3
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.byte 0xd
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.uleb128 0x6
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.byte 0x4
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.long .LCFI5-.LCFI4
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.byte 0xc
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.uleb128 0x7
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.uleb128 0x8
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.align 8
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.LEFDE2:
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.LSFDE4:
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.long .LEFDE4-.LASFDE4
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.LASFDE4:
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.long .Lframe0
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.quad .LFB2
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.quad .LFE2-.LFB2
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.byte 0x4
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.long .LCFI6-.LFB2
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.byte 0xe
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.uleb128 0x10
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.byte 0x86
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.uleb128 0x2
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.byte 0x4
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.long .LCFI7-.LCFI6
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.byte 0xd
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.uleb128 0x6
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.byte 0x4
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.long .LCFI8-.LCFI7
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.byte 0xc
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.uleb128 0x7
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.uleb128 0x8
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.align 8
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.LEFDE4:
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.section .eh_frame,"a",@progbits
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.Lframe1:
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.long .LECIE1-.LSCIE1
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.LSCIE1:
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.long 0
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.byte 0x1
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.string "zR"
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.uleb128 0x1
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.sleb128 -8
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.byte 0x10
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.uleb128 0x1
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.byte 0x3
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.byte 0xc
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.uleb128 0x7
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.uleb128 0x8
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.byte 0x90
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.uleb128 0x1
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.align 8
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.LECIE1:
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.LSFDE7:
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.long .LEFDE7-.LASFDE7
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.LASFDE7:
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.long .LASFDE7-.Lframe1
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.long .LFB0
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.long .LFE0-.LFB0
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.uleb128 0
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.byte 0x4
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.long .LCFI0-.LFB0
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.byte 0xe
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.uleb128 0x10
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.byte 0x86
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.uleb128 0x2
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.byte 0x4
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.long .LCFI1-.LCFI0
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.byte 0xd
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.uleb128 0x6
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.byte 0x4
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.long .LCFI2-.LCFI1
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.byte 0xc
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.uleb128 0x7
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.uleb128 0x8
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.align 8
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.LEFDE7:
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.LSFDE9:
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.long .LEFDE9-.LASFDE9
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.LASFDE9:
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.long .LASFDE9-.Lframe1
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.long .LFB1
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.long .LFE1-.LFB1
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.uleb128 0
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.byte 0x4
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.long .LCFI3-.LFB1
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.byte 0xe
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.uleb128 0x10
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.byte 0x86
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.uleb128 0x2
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.byte 0x4
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.long .LCFI4-.LCFI3
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.byte 0xd
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.uleb128 0x6
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.byte 0x4
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.long .LCFI5-.LCFI4
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.byte 0xc
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.uleb128 0x7
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.uleb128 0x8
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.align 8
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.LEFDE9:
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.LSFDE11:
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.long .LEFDE11-.LASFDE11
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.LASFDE11:
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.long .LASFDE11-.Lframe1
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.long .LFB2
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.long .LFE2-.LFB2
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.uleb128 0
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.byte 0x4
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.long .LCFI6-.LFB2
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.byte 0xe
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.uleb128 0x10
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.byte 0x86
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.uleb128 0x2
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.byte 0x4
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.long .LCFI7-.LCFI6
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.byte 0xd
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.uleb128 0x6
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.byte 0x4
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.long .LCFI8-.LCFI7
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.byte 0xc
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.uleb128 0x7
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.uleb128 0x8
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.align 8
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.LEFDE11:
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.text
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.Letext0:
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.section .debug_info,"",@progbits
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.Ldebug_info0:
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.long 0x8c
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.value 0x2
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.long .Ldebug_abbrev0
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.byte 0x8
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.uleb128 0x1
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.long .LASF2
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.byte 0x1
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.long .LASF3
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.long .LASF4
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.quad .Ltext0
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.quad .Letext0
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.long .Ldebug_line0
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.uleb128 0x2
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.byte 0x1
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.long .LASF0
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.byte 0x1
|
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.byte 0x12
|
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.quad .LFB0
|
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.quad .LFE0
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.long .LLST0
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.byte 0x1
|
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.uleb128 0x3
|
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.byte 0x1
|
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.long .LASF1
|
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.byte 0x1
|
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.byte 0x19
|
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.quad .LFB1
|
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.quad .LFE1
|
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.long .LLST1
|
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.byte 0x1
|
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.uleb128 0x4
|
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.byte 0x1
|
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.long .LASF5
|
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.byte 0x1
|
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.byte 0x1f
|
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.long 0x88
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.quad .LFB2
|
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.quad .LFE2
|
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.long .LLST2
|
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.byte 0x1
|
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.uleb128 0x5
|
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.byte 0x4
|
||||
.byte 0x5
|
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.string "int"
|
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.byte 0
|
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.section .debug_abbrev,"",@progbits
|
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.Ldebug_abbrev0:
|
||||
.uleb128 0x1
|
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.uleb128 0x11
|
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.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-reg-undefined.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
|
||||
|
|
@ -1,36 +0,0 @@
|
|||
/*
|
||||
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/>. */
|
||||
|
||||
void
|
||||
stop_frame ()
|
||||
{
|
||||
/* The debug information for this frame is modified in the accompanying
|
||||
.S file, to mark a set of registers as being DW_CFA_same_value. */
|
||||
}
|
||||
|
||||
void
|
||||
first_frame ()
|
||||
{
|
||||
stop_frame ();
|
||||
}
|
||||
|
||||
int
|
||||
main ()
|
||||
{
|
||||
first_frame ();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1,44 +0,0 @@
|
|||
# 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/>.
|
||||
load_lib dwarf.exp
|
||||
|
||||
# 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 { [prepare_for_testing $testfile.exp $testfile $srcfile {nodebug}] } {
|
||||
return -1
|
||||
}
|
||||
|
||||
if ![runto stop_frame] {
|
||||
perror "Failed to stop in stop_frame"
|
||||
return -1
|
||||
}
|
||||
|
||||
gdb_test "bt" \
|
||||
"#0 stop_frame \[^\r\n\]*\r\nBacktrace stopped: previous frame identical to this frame \\(corrupt stack\\?\\)" \
|
||||
"backtrace from stop_frame"
|
||||
|
||||
gdb_test "up" \
|
||||
"Initial frame selected; you cannot go up\\\." \
|
||||
"up from stop_frame"
|
||||
Loading…
Reference in New Issue