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gdb-7.7-bnc891040-3.patch
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File gdb-7.7-bnc891040-3.patch of Package gdb
commit 938f0e2f6766e90a5ddc5df00e97a68873fd1252 Author: Andrew Burgess <aburgess@broadcom.com> Date: Wed Apr 2 17:02:51 2014 +0100 Remove previous frame if an error occurs when computing frame id during unwind. https://sourceware.org/ml/gdb-patches/2014-05/msg00712.html If an error is thrown during computing a frame id then the frame is left in existence but without a valid frame id, this will trigger internal errors if/when the frame is later visited (for example in a backtrace). This patch catches errors raised while computing the frame id, and arranges for the new frame, the one without a frame id, to be removed from the linked list of frames. gdb/ChangeLog: * frame.c (remove_prev_frame): New function. (get_prev_frame_if_no_cycle): Create / discard cleanup using remove_prev_frame. gdb/testsuite/ChangeLog: * gdb.arch/amd64-invalid-stack-middle.S: New file. * gdb.arch/amd64-invalid-stack-middle.c: New file. * gdb.arch/amd64-invalid-stack-middle.exp: New file. * gdb.arch/amd64-invalid-stack-top.c: New file. * gdb.arch/amd64-invalid-stack-top.exp: New file. diff --git a/gdb/frame.c b/gdb/frame.c index 013d602..cbff25f 100644 --- a/gdb/frame.c +++ b/gdb/frame.c @@ -1738,6 +1738,22 @@ frame_register_unwind_location (struct frame_info *this_frame, int regnum, } } +/* Called during frame unwinding to remove a previous frame pointer from a + frame passed in ARG. */ + +static void +remove_prev_frame (void *arg) +{ + struct frame_info *this_frame, *prev_frame; + + this_frame = (struct frame_info *) arg; + prev_frame = this_frame->prev; + gdb_assert (prev_frame != NULL); + + prev_frame->next = NULL; + this_frame->prev = NULL; +} + /* Get the previous raw frame, and check that it is not identical to same other frame frame already in the chain. If it is, there is most likely a stack cycle, so we discard it, and mark THIS_FRAME as @@ -1750,28 +1766,36 @@ static struct frame_info * get_prev_frame_if_no_cycle (struct frame_info *this_frame) { struct frame_info *prev_frame; + struct cleanup *prev_frame_cleanup; prev_frame = get_prev_frame_raw (this_frame); if (prev_frame == NULL) return NULL; - compute_frame_id (prev_frame); - if (frame_stash_add (prev_frame)) - return prev_frame; + /* The cleanup will remove the previous frame that get_prev_frame_raw + linked onto THIS_FRAME. */ + prev_frame_cleanup = make_cleanup (remove_prev_frame, this_frame); - /* Another frame with the same id was already in the stash. We just - detected a cycle. */ - if (frame_debug) + compute_frame_id (prev_frame); + if (!frame_stash_add (prev_frame)) { - fprintf_unfiltered (gdb_stdlog, "-> "); - fprint_frame (gdb_stdlog, NULL); - fprintf_unfiltered (gdb_stdlog, " // this frame has same ID }\n"); + /* Another frame with the same id was already in the stash. We just + detected a cycle. */ + if (frame_debug) + { + fprintf_unfiltered (gdb_stdlog, "-> "); + fprint_frame (gdb_stdlog, NULL); + fprintf_unfiltered (gdb_stdlog, " // this frame has same ID }\n"); + } + this_frame->stop_reason = UNWIND_SAME_ID; + /* Unlink. */ + prev_frame->next = NULL; + this_frame->prev = NULL; + prev_frame = NULL; } - this_frame->stop_reason = UNWIND_SAME_ID; - /* Unlink. */ - prev_frame->next = NULL; - this_frame->prev = NULL; - return NULL; + + discard_cleanups (prev_frame_cleanup); + return prev_frame; } /* Return a "struct frame_info" corresponding to the frame that called diff --git a/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.S b/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.S new file mode 100644 index 0000000..3b4a067 --- /dev/null +++ b/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.S @@ -0,0 +1,1410 @@ +/* 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-invalid-stack-middle.c + using: 'gcc -g -O0 -S -dA' and gcc version '4.7.2'. + Changes were then made to the CFI entry for func2. */ + + .file "amd64-invalid-stack-middle.c" + .text +.Ltext0: + .globl breakpt + .type breakpt, @function +breakpt: +.LFB0: + .file 1 "amd64-invalid-stack-middle.c" + # amd64-invalid-stack-middle.c:25 + .loc 1 25 0 +# BLOCK 2 seq:0 +# PRED: ENTRY (fallthru) + pushq %rbp +.LCFI0: + movq %rsp, %rbp +.LCFI1: + # amd64-invalid-stack-middle.c:27 + .loc 1 27 0 + popq %rbp +.LCFI2: +# SUCC: EXIT [100.0%] + ret +.LFE0: + .size breakpt, .-breakpt + .globl func5 + .type func5, @function +func5: +.LFB1: + # amd64-invalid-stack-middle.c:31 + .loc 1 31 0 +# BLOCK 2 seq:0 +# PRED: ENTRY (fallthru) + pushq %rbp +.LCFI3: + movq %rsp, %rbp +.LCFI4: + # amd64-invalid-stack-middle.c:32 + .loc 1 32 0 + movl $0, %eax + call breakpt + # amd64-invalid-stack-middle.c:33 + .loc 1 33 0 + popq %rbp +.LCFI5: +# SUCC: EXIT [100.0%] + ret +.LFE1: + .size func5, .-func5 + .globl func4 + .type func4, @function +func4: +.LFB2: + # amd64-invalid-stack-middle.c:37 + .loc 1 37 0 +# BLOCK 2 seq:0 +# PRED: ENTRY (fallthru) + pushq %rbp +.LCFI6: + movq %rsp, %rbp +.LCFI7: + # amd64-invalid-stack-middle.c:38 + .loc 1 38 0 + movl $0, %eax + call func5 + # amd64-invalid-stack-middle.c:39 + .loc 1 39 0 + popq %rbp +.LCFI8: +# SUCC: EXIT [100.0%] + ret +.LFE2: + .size func4, .-func4 + .globl func3 + .type func3, @function +func3: +.LFB3: + # amd64-invalid-stack-middle.c:43 + .loc 1 43 0 +# BLOCK 2 seq:0 +# PRED: ENTRY (fallthru) + pushq %rbp +.LCFI9: + movq %rsp, %rbp +.LCFI10: + # amd64-invalid-stack-middle.c:44 + .loc 1 44 0 + movl $0, %eax + call func4 + # amd64-invalid-stack-middle.c:45 + .loc 1 45 0 + popq %rbp +.LCFI11: +# SUCC: EXIT [100.0%] + ret +.LFE3: + .size func3, .-func3 + .globl func2 + .type func2, @function +func2: +.LFB4: + # amd64-invalid-stack-middle.c:49 + .loc 1 49 0 +# BLOCK 2 seq:0 +# PRED: ENTRY (fallthru) + pushq %rbp +.LCFI12: + movq %rsp, %rbp +.LCFI13: + subq $8, %rsp + movq %rdi, -8(%rbp) + # amd64-invalid-stack-middle.c:50 + .loc 1 50 0 + movl $0, %eax + call func3 + # amd64-invalid-stack-middle.c:51 + .loc 1 51 0 + leave +.LCFI14: +# SUCC: EXIT [100.0%] + ret +.LFE4: + .size func2, .-func2 + .globl func1 + .type func1, @function +func1: +.LFB5: + # amd64-invalid-stack-middle.c:55 + .loc 1 55 0 +# BLOCK 2 seq:0 +# PRED: ENTRY (fallthru) + pushq %rbp +.LCFI15: + movq %rsp, %rbp +.LCFI16: + subq $8, %rsp + movq %rdi, -8(%rbp) + # amd64-invalid-stack-middle.c:56 + .loc 1 56 0 + movq -8(%rbp), %rax + movq %rax, %rdi + call func2 + # amd64-invalid-stack-middle.c:57 + .loc 1 57 0 + leave +.LCFI17: +# SUCC: EXIT [100.0%] + ret +.LFE5: + .size func1, .-func1 + .section .rodata +.LC0: + .string "amd64-invalid-stack-middle.c" +.LC1: + .string "ptr != ((void *) -1)" +.LC2: + .string "ans == 0" + .text + .type make_invalid_ptr, @function +make_invalid_ptr: +.LFB6: + # amd64-invalid-stack-middle.c:65 + .loc 1 65 0 +# BLOCK 2 seq:0 +# PRED: ENTRY (fallthru) + pushq %rbp +.LCFI18: + movq %rsp, %rbp +.LCFI19: + subq $32, %rsp + # amd64-invalid-stack-middle.c:69 + .loc 1 69 0 + call getpagesize + movl %eax, -4(%rbp) + # amd64-invalid-stack-middle.c:70 + .loc 1 70 0 + movl -4(%rbp), %eax + cltq + movl $0, %r9d + movl $-1, %r8d + movl $34, %ecx + movl $0, %edx + movq %rax, %rsi + movl $0, %edi + call mmap + movq %rax, -16(%rbp) + # amd64-invalid-stack-middle.c:73 + .loc 1 73 0 + cmpq $-1, -16(%rbp) +# SUCC: 3 (fallthru) 4 + jne .L8 +# BLOCK 3 seq:1 +# PRED: 2 (fallthru) + movl $__PRETTY_FUNCTION__.2362, %ecx + movl $73, %edx + movl $.LC0, %esi + movl $.LC1, %edi +# SUCC: + call __assert_fail +# BLOCK 4 seq:2 +# PRED: 2 +.L8: + # amd64-invalid-stack-middle.c:74 + .loc 1 74 0 + movl -4(%rbp), %eax + movslq %eax, %rdx + movq -16(%rbp), %rax + movq %rdx, %rsi + movq %rax, %rdi + call munmap + movl %eax, -20(%rbp) + # amd64-invalid-stack-middle.c:75 + .loc 1 75 0 + cmpl $0, -20(%rbp) +# SUCC: 5 (fallthru) 6 + je .L9 +# BLOCK 5 seq:3 +# PRED: 4 (fallthru) + movl $__PRETTY_FUNCTION__.2362, %ecx + movl $75, %edx + movl $.LC0, %esi + movl $.LC2, %edi +# SUCC: + call __assert_fail +# BLOCK 6 seq:4 +# PRED: 4 +.L9: + # amd64-invalid-stack-middle.c:77 + .loc 1 77 0 + movq -16(%rbp), %rax + # amd64-invalid-stack-middle.c:78 + .loc 1 78 0 + leave +.LCFI20: +# SUCC: EXIT [100.0%] + ret +.LFE6: + .size make_invalid_ptr, .-make_invalid_ptr + .globl main + .type main, @function +main: +.LFB7: + # amd64-invalid-stack-middle.c:82 + .loc 1 82 0 +# BLOCK 2 seq:0 +# PRED: ENTRY (fallthru) + pushq %rbp +.LCFI21: + movq %rsp, %rbp +.LCFI22: + subq $16, %rsp + # amd64-invalid-stack-middle.c:85 + .loc 1 85 0 + call make_invalid_ptr + movq %rax, -8(%rbp) + # amd64-invalid-stack-middle.c:86 + .loc 1 86 0 + movq -8(%rbp), %rax + movq %rax, %rdi + call func1 + # amd64-invalid-stack-middle.c:88 + .loc 1 88 0 + movl $0, %eax + # amd64-invalid-stack-middle.c:89 + .loc 1 89 0 + leave +.LCFI23: +# SUCC: EXIT [100.0%] + ret +.LFE7: + .size main, .-main + .section .rodata + .align 16 + .type __PRETTY_FUNCTION__.2362, @object + .size __PRETTY_FUNCTION__.2362, 17 +__PRETTY_FUNCTION__.2362: + .string "make_invalid_ptr" +#APP + .section .debug_frame,"",@progbits +.Lframe0: + .long .LECIE0-.LSCIE0 # Length of Common Information Entry +.LSCIE0: + .long 0xffffffff # CIE Identifier Tag + .byte 0x1 # CIE Version + .ascii "\0" # CIE Augmentation + .uleb128 0x1 # CIE Code Alignment Factor + .sleb128 -8 # CIE Data Alignment Factor + .byte 0x10 # CIE RA Column + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .byte 0x90 # DW_CFA_offset, column 0x10 + .uleb128 0x1 + .align 8 +.LECIE0: +.LSFDE0: + .long .LEFDE0-.LASFDE0 # FDE Length +.LASFDE0: + .long .Lframe0 # FDE CIE offset + .quad .LFB0 # FDE initial location + .quad .LFE0-.LFB0 # FDE address range + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI0-.LFB0 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI1-.LCFI0 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI2-.LCFI1 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE0: +.LSFDE2: + .long .LEFDE2-.LASFDE2 # FDE Length +.LASFDE2: + .long .Lframe0 # FDE CIE offset + .quad .LFB1 # FDE initial location + .quad .LFE1-.LFB1 # FDE address range + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI3-.LFB1 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI4-.LCFI3 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI5-.LCFI4 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE2: +.LSFDE4: + .long .LEFDE4-.LASFDE4 # FDE Length +.LASFDE4: + .long .Lframe0 # FDE CIE offset + .quad .LFB2 # FDE initial location + .quad .LFE2-.LFB2 # FDE address range + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI6-.LFB2 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI7-.LCFI6 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI8-.LCFI7 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE4: +.LSFDE6: + .long .LEFDE6-.LASFDE6 # FDE Length +.LASFDE6: + .long .Lframe0 # FDE CIE offset + .quad .LFB3 # FDE initial location + .quad .LFE3-.LFB3 # FDE address range + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI9-.LFB3 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI10-.LCFI9 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI11-.LCFI10 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE6: +.LSFDE8: + .long .LEFDE8-.LASFDE8 # FDE Length +.LASFDE8: + .long .Lframe0 # FDE CIE offset + .quad .LFB4 # FDE initial location + .quad .LFE4-.LFB4 # FDE address range + .byte 0xf # DW_CFA_def_cfa_expression + .uleb128 .LEDWBLK1 - .LSDWBLK1 +.LSDWBLK1: + .byte 0x75 # DW_OP_breg5 + .sleb128 0x0 # offset + .byte 0x94 # DW_OP_dref_size + .byte 0x8 # size +.LEDWBLK1: + .align 8 # Padding. +.LEFDE8: +.LSFDE10: + .long .LEFDE10-.LASFDE10 # FDE Length +.LASFDE10: + .long .Lframe0 # FDE CIE offset + .quad .LFB5 # FDE initial location + .quad .LFE5-.LFB5 # FDE address range + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI15-.LFB5 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI16-.LCFI15 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI17-.LCFI16 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE10: +.LSFDE12: + .long .LEFDE12-.LASFDE12 # FDE Length +.LASFDE12: + .long .Lframe0 # FDE CIE offset + .quad .LFB6 # FDE initial location + .quad .LFE6-.LFB6 # FDE address range + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI18-.LFB6 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI19-.LCFI18 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI20-.LCFI19 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE12: +.LSFDE14: + .long .LEFDE14-.LASFDE14 # FDE Length +.LASFDE14: + .long .Lframe0 # FDE CIE offset + .quad .LFB7 # FDE initial location + .quad .LFE7-.LFB7 # FDE address range + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI21-.LFB7 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI22-.LCFI21 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI23-.LCFI22 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE14: +#NO_APP +#APP + .section .eh_frame,"a",@progbits +.Lframe1: + .long .LECIE1-.LSCIE1 # Length of Common Information Entry +.LSCIE1: + .long 0 # CIE Identifier Tag + .byte 0x1 # CIE Version + .ascii "zR\0" # CIE Augmentation + .uleb128 0x1 # CIE Code Alignment Factor + .sleb128 -8 # CIE Data Alignment Factor + .byte 0x10 # CIE RA Column + .uleb128 0x1 # Augmentation size + .byte 0x3 # FDE Encoding (udata4) + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .byte 0x90 # DW_CFA_offset, column 0x10 + .uleb128 0x1 + .align 8 +.LECIE1: +.LSFDE17: + .long .LEFDE17-.LASFDE17 # FDE Length +.LASFDE17: + .long .LASFDE17-.Lframe1 # FDE CIE offset + .long .LFB0 # FDE initial location + .long .LFE0-.LFB0 # FDE address range + .uleb128 0 # Augmentation size + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI0-.LFB0 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI1-.LCFI0 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI2-.LCFI1 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE17: +.LSFDE19: + .long .LEFDE19-.LASFDE19 # FDE Length +.LASFDE19: + .long .LASFDE19-.Lframe1 # FDE CIE offset + .long .LFB1 # FDE initial location + .long .LFE1-.LFB1 # FDE address range + .uleb128 0 # Augmentation size + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI3-.LFB1 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI4-.LCFI3 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI5-.LCFI4 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE19: +.LSFDE21: + .long .LEFDE21-.LASFDE21 # FDE Length +.LASFDE21: + .long .LASFDE21-.Lframe1 # FDE CIE offset + .long .LFB2 # FDE initial location + .long .LFE2-.LFB2 # FDE address range + .uleb128 0 # Augmentation size + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI6-.LFB2 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI7-.LCFI6 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI8-.LCFI7 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE21: +.LSFDE23: + .long .LEFDE23-.LASFDE23 # FDE Length +.LASFDE23: + .long .LASFDE23-.Lframe1 # FDE CIE offset + .long .LFB3 # FDE initial location + .long .LFE3-.LFB3 # FDE address range + .uleb128 0 # Augmentation size + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI9-.LFB3 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI10-.LCFI9 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI11-.LCFI10 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE23: +.LSFDE25: + .long .LEFDE25-.LASFDE25 # FDE Length +.LASFDE25: + .long .LASFDE25-.Lframe1 # FDE CIE offset + .long .LFB4 # FDE initial location + .long .LFE4-.LFB4 # FDE address range + .uleb128 0 # Augmentation size + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI12-.LFB4 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI13-.LCFI12 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI14-.LCFI13 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE25: +.LSFDE27: + .long .LEFDE27-.LASFDE27 # FDE Length +.LASFDE27: + .long .LASFDE27-.Lframe1 # FDE CIE offset + .long .LFB5 # FDE initial location + .long .LFE5-.LFB5 # FDE address range + .uleb128 0 # Augmentation size + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI15-.LFB5 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI16-.LCFI15 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI17-.LCFI16 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE27: +.LSFDE29: + .long .LEFDE29-.LASFDE29 # FDE Length +.LASFDE29: + .long .LASFDE29-.Lframe1 # FDE CIE offset + .long .LFB6 # FDE initial location + .long .LFE6-.LFB6 # FDE address range + .uleb128 0 # Augmentation size + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI18-.LFB6 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI19-.LCFI18 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI20-.LCFI19 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE29: +.LSFDE31: + .long .LEFDE31-.LASFDE31 # FDE Length +.LASFDE31: + .long .LASFDE31-.Lframe1 # FDE CIE offset + .long .LFB7 # FDE initial location + .long .LFE7-.LFB7 # FDE address range + .uleb128 0 # Augmentation size + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI21-.LFB7 + .byte 0xe # DW_CFA_def_cfa_offset + .uleb128 0x10 + .byte 0x86 # DW_CFA_offset, column 0x6 + .uleb128 0x2 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI22-.LCFI21 + .byte 0xd # DW_CFA_def_cfa_register + .uleb128 0x6 + .byte 0x4 # DW_CFA_advance_loc4 + .long .LCFI23-.LCFI22 + .byte 0xc # DW_CFA_def_cfa + .uleb128 0x7 + .uleb128 0x8 + .align 8 +.LEFDE31: +#NO_APP + .text +.Letext0: + .section .debug_info,"",@progbits +.Ldebug_info0: + .long 0x1f1 # Length of Compilation Unit Info + .value 0x2 # 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 .LASF17 # DW_AT_producer: "GNU C 4.7.2" + .byte 0x1 # DW_AT_language + .long .LASF18 # DW_AT_name: "amd64-invalid-stack-middle.c" + .long .LASF19 # DW_AT_comp_dir: "/home/gdb/binutils-gdb/gdb/testsuite/gdb.arch" + .quad .Ltext0 # DW_AT_low_pc + .quad .Letext0 # DW_AT_high_pc + .long .Ldebug_line0 # DW_AT_stmt_list + .uleb128 0x2 # (DIE (0x2d) DW_TAG_base_type) + .byte 0x8 # DW_AT_byte_size + .byte 0x7 # DW_AT_encoding + .long .LASF0 # DW_AT_name: "long unsigned int" + .uleb128 0x2 # (DIE (0x34) DW_TAG_base_type) + .byte 0x1 # DW_AT_byte_size + .byte 0x8 # DW_AT_encoding + .long .LASF1 # DW_AT_name: "unsigned char" + .uleb128 0x2 # (DIE (0x3b) DW_TAG_base_type) + .byte 0x2 # DW_AT_byte_size + .byte 0x7 # DW_AT_encoding + .long .LASF2 # DW_AT_name: "short unsigned int" + .uleb128 0x2 # (DIE (0x42) DW_TAG_base_type) + .byte 0x4 # DW_AT_byte_size + .byte 0x7 # DW_AT_encoding + .long .LASF3 # DW_AT_name: "unsigned int" + .uleb128 0x2 # (DIE (0x49) DW_TAG_base_type) + .byte 0x1 # DW_AT_byte_size + .byte 0x6 # DW_AT_encoding + .long .LASF4 # DW_AT_name: "signed char" + .uleb128 0x2 # (DIE (0x50) DW_TAG_base_type) + .byte 0x2 # DW_AT_byte_size + .byte 0x5 # DW_AT_encoding + .long .LASF5 # DW_AT_name: "short int" + .uleb128 0x3 # (DIE (0x57) DW_TAG_base_type) + .byte 0x4 # DW_AT_byte_size + .byte 0x5 # DW_AT_encoding + .ascii "int\0" # DW_AT_name + .uleb128 0x2 # (DIE (0x5e) DW_TAG_base_type) + .byte 0x8 # DW_AT_byte_size + .byte 0x5 # DW_AT_encoding + .long .LASF6 # DW_AT_name: "long int" + .uleb128 0x2 # (DIE (0x65) DW_TAG_base_type) + .byte 0x8 # DW_AT_byte_size + .byte 0x7 # DW_AT_encoding + .long .LASF7 # DW_AT_name: "sizetype" + .uleb128 0x4 # (DIE (0x6c) DW_TAG_pointer_type) + .byte 0x8 # DW_AT_byte_size + .uleb128 0x2 # (DIE (0x6e) DW_TAG_base_type) + .byte 0x1 # DW_AT_byte_size + .byte 0x6 # DW_AT_encoding + .long .LASF8 # DW_AT_name: "char" + .uleb128 0x5 # (DIE (0x75) DW_TAG_subprogram) + .byte 0x1 # DW_AT_external + .long .LASF9 # DW_AT_name: "breakpt" + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x18 # DW_AT_decl_line + .quad .LFB0 # DW_AT_low_pc + .quad .LFE0 # DW_AT_high_pc + .long .LLST0 # DW_AT_frame_base + .byte 0x1 # DW_AT_GNU_all_call_sites + .uleb128 0x6 # (DIE (0x92) DW_TAG_subprogram) + .byte 0x1 # DW_AT_external + .long .LASF10 # DW_AT_name: "func5" + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x1e # DW_AT_decl_line + .quad .LFB1 # DW_AT_low_pc + .quad .LFE1 # DW_AT_high_pc + .long .LLST1 # DW_AT_frame_base + .byte 0x1 # DW_AT_GNU_all_tail_call_sites + .uleb128 0x6 # (DIE (0xaf) DW_TAG_subprogram) + .byte 0x1 # DW_AT_external + .long .LASF11 # DW_AT_name: "func4" + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x24 # DW_AT_decl_line + .quad .LFB2 # DW_AT_low_pc + .quad .LFE2 # DW_AT_high_pc + .long .LLST2 # DW_AT_frame_base + .byte 0x1 # DW_AT_GNU_all_tail_call_sites + .uleb128 0x6 # (DIE (0xcc) DW_TAG_subprogram) + .byte 0x1 # DW_AT_external + .long .LASF12 # DW_AT_name: "func3" + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x2a # DW_AT_decl_line + .quad .LFB3 # DW_AT_low_pc + .quad .LFE3 # DW_AT_high_pc + .long .LLST3 # DW_AT_frame_base + .byte 0x1 # DW_AT_GNU_all_tail_call_sites + .uleb128 0x7 # (DIE (0xe9) DW_TAG_subprogram) + .byte 0x1 # DW_AT_external + .long .LASF13 # DW_AT_name: "func2" + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x30 # DW_AT_decl_line + .byte 0x1 # DW_AT_prototyped + .quad .LFB4 # DW_AT_low_pc + .quad .LFE4 # DW_AT_high_pc + .long .LLST4 # DW_AT_frame_base + .byte 0x1 # DW_AT_GNU_all_tail_call_sites + .long 0x11a # DW_AT_sibling + .uleb128 0x8 # (DIE (0x10b) DW_TAG_formal_parameter) + .ascii "ptr\0" # DW_AT_name + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x30 # DW_AT_decl_line + .long 0x6c # DW_AT_type + .byte 0x2 # DW_AT_location + .byte 0x91 # DW_OP_fbreg + .sleb128 -24 + .byte 0 # end of children of DIE 0xe9 + .uleb128 0x7 # (DIE (0x11a) DW_TAG_subprogram) + .byte 0x1 # DW_AT_external + .long .LASF14 # DW_AT_name: "func1" + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x36 # DW_AT_decl_line + .byte 0x1 # DW_AT_prototyped + .quad .LFB5 # DW_AT_low_pc + .quad .LFE5 # DW_AT_high_pc + .long .LLST5 # DW_AT_frame_base + .byte 0x1 # DW_AT_GNU_all_tail_call_sites + .long 0x14b # DW_AT_sibling + .uleb128 0x8 # (DIE (0x13c) DW_TAG_formal_parameter) + .ascii "ptr\0" # DW_AT_name + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x36 # DW_AT_decl_line + .long 0x6c # DW_AT_type + .byte 0x2 # DW_AT_location + .byte 0x91 # DW_OP_fbreg + .sleb128 -24 + .byte 0 # end of children of DIE 0x11a + .uleb128 0x9 # (DIE (0x14b) DW_TAG_subprogram) + .long .LASF20 # DW_AT_name: "make_invalid_ptr" + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x40 # DW_AT_decl_line + .byte 0x1 # DW_AT_prototyped + .long 0x6c # DW_AT_type + .quad .LFB6 # DW_AT_low_pc + .quad .LFE6 # DW_AT_high_pc + .long .LLST6 # DW_AT_frame_base + .byte 0x1 # DW_AT_GNU_all_tail_call_sites + .long 0x1af # DW_AT_sibling + .uleb128 0xa # (DIE (0x170) DW_TAG_variable) + .long .LASF15 # DW_AT_name: "page_size" + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x42 # DW_AT_decl_line + .long 0x57 # DW_AT_type + .byte 0x2 # DW_AT_location + .byte 0x91 # DW_OP_fbreg + .sleb128 -20 + .uleb128 0xb # (DIE (0x17e) DW_TAG_variable) + .ascii "ans\0" # DW_AT_name + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x42 # DW_AT_decl_line + .long 0x57 # DW_AT_type + .byte 0x2 # DW_AT_location + .byte 0x91 # DW_OP_fbreg + .sleb128 -36 + .uleb128 0xb # (DIE (0x18c) DW_TAG_variable) + .ascii "ptr\0" # DW_AT_name + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x43 # DW_AT_decl_line + .long 0x6c # DW_AT_type + .byte 0x2 # DW_AT_location + .byte 0x91 # DW_OP_fbreg + .sleb128 -32 + .uleb128 0xc # (DIE (0x19a) DW_TAG_variable) + .long .LASF21 # DW_AT_name: "__PRETTY_FUNCTION__" + .long 0x1bf # DW_AT_type + .byte 0x1 # DW_AT_artificial + .byte 0x9 # DW_AT_location + .byte 0x3 # DW_OP_addr + .quad __PRETTY_FUNCTION__.2362 + .byte 0 # end of children of DIE 0x14b + .uleb128 0xd # (DIE (0x1af) DW_TAG_array_type) + .long 0x6e # DW_AT_type + .long 0x1bf # DW_AT_sibling + .uleb128 0xe # (DIE (0x1b8) DW_TAG_subrange_type) + .long 0x65 # DW_AT_type + .byte 0x10 # DW_AT_upper_bound + .byte 0 # end of children of DIE 0x1af + .uleb128 0xf # (DIE (0x1bf) DW_TAG_const_type) + .long 0x1af # DW_AT_type + .uleb128 0x10 # (DIE (0x1c4) DW_TAG_subprogram) + .byte 0x1 # DW_AT_external + .long .LASF22 # DW_AT_name: "main" + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x51 # DW_AT_decl_line + .long 0x57 # DW_AT_type + .quad .LFB7 # DW_AT_low_pc + .quad .LFE7 # DW_AT_high_pc + .long .LLST7 # DW_AT_frame_base + .byte 0x1 # DW_AT_GNU_all_tail_call_sites + .uleb128 0xa # (DIE (0x1e5) DW_TAG_variable) + .long .LASF16 # DW_AT_name: "invalid_ptr" + .byte 0x1 # DW_AT_decl_file (amd64-invalid-stack-middle.c) + .byte 0x53 # DW_AT_decl_line + .long 0x6c # DW_AT_type + .byte 0x2 # DW_AT_location + .byte 0x91 # DW_OP_fbreg + .sleb128 -24 + .byte 0 # end of children of DIE 0x1c4 + .byte 0 # end of children of DIE 0xb + .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 0x11 # (DW_AT_low_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x12 # (DW_AT_high_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x10 # (DW_AT_stmt_list) + .uleb128 0x6 # (DW_FORM_data4) + .byte 0 + .byte 0 + .uleb128 0x2 # (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 0xe # (DW_FORM_strp) + .byte 0 + .byte 0 + .uleb128 0x3 # (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 0x4 # (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) + .byte 0 + .byte 0 + .uleb128 0x5 # (abbrev code) + .uleb128 0x2e # (TAG: DW_TAG_subprogram) + .byte 0 # DW_children_no + .uleb128 0x3f # (DW_AT_external) + .uleb128 0xc # (DW_FORM_flag) + .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 0x11 # (DW_AT_low_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x12 # (DW_AT_high_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x40 # (DW_AT_frame_base) + .uleb128 0x6 # (DW_FORM_data4) + .uleb128 0x2117 # (DW_AT_GNU_all_call_sites) + .uleb128 0xc # (DW_FORM_flag) + .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 0xc # (DW_FORM_flag) + .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 0x11 # (DW_AT_low_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x12 # (DW_AT_high_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x40 # (DW_AT_frame_base) + .uleb128 0x6 # (DW_FORM_data4) + .uleb128 0x2116 # (DW_AT_GNU_all_tail_call_sites) + .uleb128 0xc # (DW_FORM_flag) + .byte 0 + .byte 0 + .uleb128 0x7 # (abbrev code) + .uleb128 0x2e # (TAG: DW_TAG_subprogram) + .byte 0x1 # DW_children_yes + .uleb128 0x3f # (DW_AT_external) + .uleb128 0xc # (DW_FORM_flag) + .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 0x27 # (DW_AT_prototyped) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x11 # (DW_AT_low_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x12 # (DW_AT_high_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x40 # (DW_AT_frame_base) + .uleb128 0x6 # (DW_FORM_data4) + .uleb128 0x2116 # (DW_AT_GNU_all_tail_call_sites) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x1 # (DW_AT_sibling) + .uleb128 0x13 # (DW_FORM_ref4) + .byte 0 + .byte 0 + .uleb128 0x8 # (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 0xa # (DW_FORM_block1) + .byte 0 + .byte 0 + .uleb128 0x9 # (abbrev code) + .uleb128 0x2e # (TAG: DW_TAG_subprogram) + .byte 0x1 # DW_children_yes + .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 0x27 # (DW_AT_prototyped) + .uleb128 0xc # (DW_FORM_flag) + .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 0x1 # (DW_FORM_addr) + .uleb128 0x40 # (DW_AT_frame_base) + .uleb128 0x6 # (DW_FORM_data4) + .uleb128 0x2116 # (DW_AT_GNU_all_tail_call_sites) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x1 # (DW_AT_sibling) + .uleb128 0x13 # (DW_FORM_ref4) + .byte 0 + .byte 0 + .uleb128 0xa # (abbrev code) + .uleb128 0x34 # (TAG: DW_TAG_variable) + .byte 0 # DW_children_no + .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 0x2 # (DW_AT_location) + .uleb128 0xa # (DW_FORM_block1) + .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 0xa # (DW_FORM_block1) + .byte 0 + .byte 0 + .uleb128 0xc # (abbrev code) + .uleb128 0x34 # (TAG: DW_TAG_variable) + .byte 0 # DW_children_no + .uleb128 0x3 # (DW_AT_name) + .uleb128 0xe # (DW_FORM_strp) + .uleb128 0x49 # (DW_AT_type) + .uleb128 0x13 # (DW_FORM_ref4) + .uleb128 0x34 # (DW_AT_artificial) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x2 # (DW_AT_location) + .uleb128 0xa # (DW_FORM_block1) + .byte 0 + .byte 0 + .uleb128 0xd # (abbrev code) + .uleb128 0x1 # (TAG: DW_TAG_array_type) + .byte 0x1 # DW_children_yes + .uleb128 0x49 # (DW_AT_type) + .uleb128 0x13 # (DW_FORM_ref4) + .uleb128 0x1 # (DW_AT_sibling) + .uleb128 0x13 # (DW_FORM_ref4) + .byte 0 + .byte 0 + .uleb128 0xe # (abbrev code) + .uleb128 0x21 # (TAG: DW_TAG_subrange_type) + .byte 0 # DW_children_no + .uleb128 0x49 # (DW_AT_type) + .uleb128 0x13 # (DW_FORM_ref4) + .uleb128 0x2f # (DW_AT_upper_bound) + .uleb128 0xb # (DW_FORM_data1) + .byte 0 + .byte 0 + .uleb128 0xf # (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 0x10 # (abbrev code) + .uleb128 0x2e # (TAG: DW_TAG_subprogram) + .byte 0x1 # DW_children_yes + .uleb128 0x3f # (DW_AT_external) + .uleb128 0xc # (DW_FORM_flag) + .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 0x1 # (DW_FORM_addr) + .uleb128 0x40 # (DW_AT_frame_base) + .uleb128 0x6 # (DW_FORM_data4) + .uleb128 0x2116 # (DW_AT_GNU_all_tail_call_sites) + .uleb128 0xc # (DW_FORM_flag) + .byte 0 + .byte 0 + .byte 0 + .section .debug_loc,"",@progbits +.Ldebug_loc0: +.LLST0: + .quad .LFB0-.Ltext0 # Location list begin address (*.LLST0) + .quad .LCFI0-.Ltext0 # Location list end address (*.LLST0) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad .LCFI0-.Ltext0 # Location list begin address (*.LLST0) + .quad .LCFI1-.Ltext0 # Location list end address (*.LLST0) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 16 + .quad .LCFI1-.Ltext0 # Location list begin address (*.LLST0) + .quad .LCFI2-.Ltext0 # Location list end address (*.LLST0) + .value 0x2 # Location expression size + .byte 0x76 # DW_OP_breg6 + .sleb128 16 + .quad .LCFI2-.Ltext0 # Location list begin address (*.LLST0) + .quad .LFE0-.Ltext0 # Location list end address (*.LLST0) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad 0 # Location list terminator begin (*.LLST0) + .quad 0 # Location list terminator end (*.LLST0) +.LLST1: + .quad .LFB1-.Ltext0 # Location list begin address (*.LLST1) + .quad .LCFI3-.Ltext0 # Location list end address (*.LLST1) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad .LCFI3-.Ltext0 # Location list begin address (*.LLST1) + .quad .LCFI4-.Ltext0 # Location list end address (*.LLST1) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 16 + .quad .LCFI4-.Ltext0 # Location list begin address (*.LLST1) + .quad .LCFI5-.Ltext0 # Location list end address (*.LLST1) + .value 0x2 # Location expression size + .byte 0x76 # DW_OP_breg6 + .sleb128 16 + .quad .LCFI5-.Ltext0 # Location list begin address (*.LLST1) + .quad .LFE1-.Ltext0 # Location list end address (*.LLST1) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad 0 # Location list terminator begin (*.LLST1) + .quad 0 # Location list terminator end (*.LLST1) +.LLST2: + .quad .LFB2-.Ltext0 # Location list begin address (*.LLST2) + .quad .LCFI6-.Ltext0 # Location list end address (*.LLST2) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad .LCFI6-.Ltext0 # Location list begin address (*.LLST2) + .quad .LCFI7-.Ltext0 # Location list end address (*.LLST2) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 16 + .quad .LCFI7-.Ltext0 # Location list begin address (*.LLST2) + .quad .LCFI8-.Ltext0 # Location list end address (*.LLST2) + .value 0x2 # Location expression size + .byte 0x76 # DW_OP_breg6 + .sleb128 16 + .quad .LCFI8-.Ltext0 # Location list begin address (*.LLST2) + .quad .LFE2-.Ltext0 # Location list end address (*.LLST2) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad 0 # Location list terminator begin (*.LLST2) + .quad 0 # Location list terminator end (*.LLST2) +.LLST3: + .quad .LFB3-.Ltext0 # Location list begin address (*.LLST3) + .quad .LCFI9-.Ltext0 # Location list end address (*.LLST3) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad .LCFI9-.Ltext0 # Location list begin address (*.LLST3) + .quad .LCFI10-.Ltext0 # Location list end address (*.LLST3) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 16 + .quad .LCFI10-.Ltext0 # Location list begin address (*.LLST3) + .quad .LCFI11-.Ltext0 # Location list end address (*.LLST3) + .value 0x2 # Location expression size + .byte 0x76 # DW_OP_breg6 + .sleb128 16 + .quad .LCFI11-.Ltext0 # Location list begin address (*.LLST3) + .quad .LFE3-.Ltext0 # Location list end address (*.LLST3) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad 0 # Location list terminator begin (*.LLST3) + .quad 0 # Location list terminator end (*.LLST3) +.LLST4: + .quad .LFB4-.Ltext0 # Location list begin address (*.LLST4) + .quad .LCFI12-.Ltext0 # Location list end address (*.LLST4) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad .LCFI12-.Ltext0 # Location list begin address (*.LLST4) + .quad .LCFI13-.Ltext0 # Location list end address (*.LLST4) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 16 + .quad .LCFI13-.Ltext0 # Location list begin address (*.LLST4) + .quad .LCFI14-.Ltext0 # Location list end address (*.LLST4) + .value 0x2 # Location expression size + .byte 0x76 # DW_OP_breg6 + .sleb128 16 + .quad .LCFI14-.Ltext0 # Location list begin address (*.LLST4) + .quad .LFE4-.Ltext0 # Location list end address (*.LLST4) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad 0 # Location list terminator begin (*.LLST4) + .quad 0 # Location list terminator end (*.LLST4) +.LLST5: + .quad .LFB5-.Ltext0 # Location list begin address (*.LLST5) + .quad .LCFI15-.Ltext0 # Location list end address (*.LLST5) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad .LCFI15-.Ltext0 # Location list begin address (*.LLST5) + .quad .LCFI16-.Ltext0 # Location list end address (*.LLST5) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 16 + .quad .LCFI16-.Ltext0 # Location list begin address (*.LLST5) + .quad .LCFI17-.Ltext0 # Location list end address (*.LLST5) + .value 0x2 # Location expression size + .byte 0x76 # DW_OP_breg6 + .sleb128 16 + .quad .LCFI17-.Ltext0 # Location list begin address (*.LLST5) + .quad .LFE5-.Ltext0 # Location list end address (*.LLST5) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad 0 # Location list terminator begin (*.LLST5) + .quad 0 # Location list terminator end (*.LLST5) +.LLST6: + .quad .LFB6-.Ltext0 # Location list begin address (*.LLST6) + .quad .LCFI18-.Ltext0 # Location list end address (*.LLST6) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad .LCFI18-.Ltext0 # Location list begin address (*.LLST6) + .quad .LCFI19-.Ltext0 # Location list end address (*.LLST6) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 16 + .quad .LCFI19-.Ltext0 # Location list begin address (*.LLST6) + .quad .LCFI20-.Ltext0 # Location list end address (*.LLST6) + .value 0x2 # Location expression size + .byte 0x76 # DW_OP_breg6 + .sleb128 16 + .quad .LCFI20-.Ltext0 # Location list begin address (*.LLST6) + .quad .LFE6-.Ltext0 # Location list end address (*.LLST6) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad 0 # Location list terminator begin (*.LLST6) + .quad 0 # Location list terminator end (*.LLST6) +.LLST7: + .quad .LFB7-.Ltext0 # Location list begin address (*.LLST7) + .quad .LCFI21-.Ltext0 # Location list end address (*.LLST7) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad .LCFI21-.Ltext0 # Location list begin address (*.LLST7) + .quad .LCFI22-.Ltext0 # Location list end address (*.LLST7) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 16 + .quad .LCFI22-.Ltext0 # Location list begin address (*.LLST7) + .quad .LCFI23-.Ltext0 # Location list end address (*.LLST7) + .value 0x2 # Location expression size + .byte 0x76 # DW_OP_breg6 + .sleb128 16 + .quad .LCFI23-.Ltext0 # Location list begin address (*.LLST7) + .quad .LFE7-.Ltext0 # Location list end address (*.LLST7) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad 0 # Location list terminator begin (*.LLST7) + .quad 0 # Location list terminator end (*.LLST7) + .section .debug_aranges,"",@progbits + .long 0x2c # 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 0 + .quad 0 + .section .debug_line,"",@progbits +.Ldebug_line0: + .section .debug_str,"MS",@progbits,1 +.LASF10: + .string "func5" +.LASF20: + .string "make_invalid_ptr" +.LASF21: + .string "__PRETTY_FUNCTION__" +.LASF18: + .string "amd64-invalid-stack-middle.c" +.LASF22: + .string "main" +.LASF14: + .string "func1" +.LASF17: + .string "GNU C 4.7.2" +.LASF11: + .string "func4" +.LASF0: + .string "long unsigned int" +.LASF1: + .string "unsigned char" +.LASF8: + .string "char" +.LASF6: + .string "long int" +.LASF15: + .string "page_size" +.LASF13: + .string "func2" +.LASF16: + .string "invalid_ptr" +.LASF2: + .string "short unsigned int" +.LASF4: + .string "signed char" +.LASF9: + .string "breakpt" +.LASF19: + .string "/home/gdb/binutils-gdb/gdb/testsuite/gdb.arch" +.LASF5: + .string "short int" +.LASF3: + .string "unsigned int" +.LASF12: + .string "func3" +.LASF7: + .string "sizetype" + .ident "GCC: (GNU) 4.7.2" + .section .note.GNU-stack,"",@progbits diff --git a/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.c b/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.c new file mode 100644 index 0000000..05bbd1d --- /dev/null +++ b/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.c @@ -0,0 +1,89 @@ +/* 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/>. +*/ + +#include <sys/mman.h> +#include <unistd.h> +#include <assert.h> + +void +breakpt (void) +{ + /* Nothing. */ +} + +void +func5 (void) +{ + breakpt (); +} + +void +func4 (void) +{ + func5 (); +} + +void +func3 (void) +{ + func4 (); +} + +void +func2 (void *ptr) +{ + func3 (); +} + +void +func1 (void *ptr) +{ + func2 (ptr); +} + +/* Finds and returns an invalid pointer, mmaps in a page, grabs a pointer + to it then unmaps the page again. This is almost certainly "undefined" + behaviour, but should be good enough for this small test program. */ + +static void * +make_invalid_ptr (void) +{ + int page_size, ans; + void *ptr; + + page_size = getpagesize (); + ptr = mmap (0, page_size, PROT_NONE, + MAP_PRIVATE | MAP_ANONYMOUS, + -1, 0); + assert (ptr != MAP_FAILED); + ans = munmap (ptr, page_size); + assert (ans == 0); + + return ptr; +} + +int +main (void) +{ + void *invalid_ptr; + + invalid_ptr = make_invalid_ptr (); + func1 (invalid_ptr); + + return 0; +} diff --git a/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.exp b/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.exp new file mode 100644 index 0000000..8ad5b18 --- /dev/null +++ b/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.exp @@ -0,0 +1,108 @@ +# 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/>. + +# In this test we're looking at how gdb handles backtraces and +# investigating the stack depth when confronted with an "invalid" stack, +# that is a stack where the first few frames are normal, and then there's a +# frame where the stack in unreadable. +# +# One interesting bug that has been observed is that gdb will sometime +# exhibit different behaviour the first time a stack command is run +# compared to the second (and later) times a command is run. This is +# because the first time a command is run gdb actually tries to figure out +# the answer, while the second (and later) times gdb relies on the answer +# cached from the first time. As a result in this test each command is +# run twice, and we restart gdb before testing each different command to +# ensure that nothing is being cached. + +set opts {} +standard_testfile .S + +if { ![istarget x86_64-*-* ] || ![is_lp64_target] } { + verbose "Skipping ${testfile}." + return +} + +if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} $opts] } { + return -1 +} + +if ![runto breakpt] { + return -1 +} + +gdb_test "bt" "^bt\r\n#0 +breakpt *\\(\\) \[^\r\n\]*\r\n#1 +0x\[0-9a-f\]+ in func5\[^\r\n\]*\r\n#2 +0x\[0-9a-f\]+ in func4\[^\r\n\]*\r\n#3 +0x\[0-9a-f\]+ in func3\[^\r\n\]*\r\nCannot access memory at address 0x\[0-9a-f\]+" \ + "first backtrace, with error message" + +send_gdb "bt\n" +gdb_expect { + -re "^bt\r\n#0 +breakpt *\\(\\) \[^\r\n\]*\r\n#1 +0x\[0-9a-f\]+ in func5\[^\r\n\]*\r\n#2 +0x\[0-9a-f\]+ in func4\[^\r\n\]*\r\n#3 +0x\[0-9a-f\]+ in func3\[^\r\n\]*\r\nCannot access memory at address 0x\[0-9a-f\]+\r\n$gdb_prompt $" { + # Currently gdb will not display the error message associated with + # the truncated backtrace after the first backtrace has been + # completed. Ideally, we would do this. If this case is ever hit + # then we have started to display the backtrace in all cases and + # the xpass should becomd a pass, and the previous pass case below + # should be removed, or changed to a fail. + xpass "second backtrace, with error message" + } + -re "^bt\r\n#0 +breakpt *\\(\\) \[^\r\n\]*\r\n#1 +0x\[0-9a-f\]+ in func5\[^\r\n\]*\r\n#2 +0x\[0-9a-f\]+ in func4\[^\r\n\]*\r\n#3 +0x\[0-9a-f\]+ in func3\[^\r\n\]*\r\n$gdb_prompt $" { + pass "second backtrace, without error message" + } + timeout { + fail "second backtrace (timeout)" + } +} + +clean_restart ${binfile} + +if ![runto breakpt] { + return -1 +} + +set test_name "check mi -stack-info-depth command, first time" +send_gdb "interpreter-exec mi \"-stack-info-depth\"\n" +gdb_expect { + -re "\\^done,depth=\"4\"\r\n$gdb_prompt $" { + pass $test_name + } + -re "\\^error,msg=\"Cannot access memory at address $hex\"\r\n$gdb_prompt $" { + xfail $test_name + } +} + +gdb_test "interpreter-exec mi \"-stack-info-depth\"" \ + "\\^done,depth=\"4\"" \ + "check mi -stack-info-depth command, second time" + +clean_restart ${binfile} + +if ![runto breakpt] { + return -1 +} + +set test_name "check mi -stack-list-frames command, first time" +send_gdb "interpreter-exec mi \"-stack-list-frames\"\n" +gdb_expect { + -re "\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"breakpt\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"1\",addr=\"$hex\",func=\"func5\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"2\",addr=\"$hex\",func=\"func4\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"3\",addr=\"$hex\",func=\"func3\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\}\\\]\r\n$gdb_prompt $" { + pass $test_name + } + -re "\\^error,msg=\"Cannot access memory at address $hex\"\r\n$gdb_prompt $" { + xfail $test_name + } +} + +gdb_test "interpreter-exec mi \"-stack-list-frames\"" \ + "\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"breakpt\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"1\",addr=\"$hex\",func=\"func5\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"2\",addr=\"$hex\",func=\"func4\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"3\",addr=\"$hex\",func=\"func3\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\}\\\]" \ + "check mi -stack-list-frames command, second time" diff --git a/gdb/testsuite/gdb.arch/amd64-invalid-stack-top.c b/gdb/testsuite/gdb.arch/amd64-invalid-stack-top.c new file mode 100644 index 0000000..168dc55 --- /dev/null +++ b/gdb/testsuite/gdb.arch/amd64-invalid-stack-top.c @@ -0,0 +1,73 @@ +/* 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/>. +*/ + +#include <sys/mman.h> +#include <unistd.h> +#include <assert.h> + +void *global_invalid_ptr = NULL; + +void +func2 (void) +{ + /* Replace the current stack pointer and frame pointer with the invalid + pointer. */ + asm ("mov %0, %%rsp\n\tmov %0, %%rbp" : : "r" (global_invalid_ptr)); + + /* Create a label for a breakpoint. */ + asm (".global breakpt\nbreakpt:"); +} + +void +func1 (void *ptr) +{ + global_invalid_ptr = ptr; + func2 (); +} + +/* Finds and returns an invalid pointer, mmaps in a page, grabs a pointer + to it then unmaps the page again. This is almost certainly "undefined" + behaviour, but should be good enough for this small test program. */ + +static void * +make_invalid_ptr (void) +{ + int page_size, ans; + void *ptr; + + page_size = getpagesize (); + ptr = mmap (0, page_size, PROT_NONE, + MAP_PRIVATE | MAP_ANONYMOUS, + -1, 0); + assert (ptr != MAP_FAILED); + ans = munmap (ptr, page_size); + assert (ans == 0); + + return ptr; +} + +int +main (void) +{ + void *invalid_ptr; + + invalid_ptr = make_invalid_ptr (); + func1 (invalid_ptr); + + return 0; +} diff --git a/gdb/testsuite/gdb.arch/amd64-invalid-stack-top.exp b/gdb/testsuite/gdb.arch/amd64-invalid-stack-top.exp new file mode 100644 index 0000000..0225326 --- /dev/null +++ b/gdb/testsuite/gdb.arch/amd64-invalid-stack-top.exp @@ -0,0 +1,111 @@ +# 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/>. + +# In this test we're looking at how gdb handles backtraces and +# investigating the stack depth when confronted with an "invalid" stack, +# that is a stack where the first few frames are normal, and then there's a +# frame where the stack in unreadable. +# +# One interesting bug that has been observed is that gdb will sometime +# exhibit different behaviour the first time a stack command is run +# compared to the second (and later) times a command is run. This is +# because the first time a command is run gdb actually tries to figure out +# the answer, while the second (and later) times gdb relies on the answer +# cached from the first time. As a result in this test each command is +# run twice, and we restart gdb before testing each different command to +# ensure that nothing is being cached. + +set opts {} +standard_testfile .c + +if { ![istarget x86_64-*-* ] || ![is_lp64_target] } { + verbose "Skipping ${testfile}." + return +} +if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} $opts] } { + return -1 +} + +if ![runto breakpt] { + return -1 +} + +# Use 'bt no-filters' here as the python filters will raise their own +# error during initialisation, the no-filters case is simpler. + +gdb_test "bt no-filters" "^bt no-filters\r\n#0 +$hex in func2 \\(\\)\r\nCannot access memory at address 0x\[0-9a-f\]+" \ + "first backtrace, with error message" + +send_gdb "bt no-filters\n" +gdb_expect { + -re "^bt no-filters\r\n#0 +$hex in func2 \\(\\)\r\nCannot access memory at address 0x\[0-9a-f\]+\r\n$gdb_prompt $" { + # Currently gdb will not display the error message associated with + # the truncated backtrace after the first backtrace has been + # completed. Ideally, we would do this. If this case is ever hit + # then we have started to display the backtrace in all cases and + # the xpass should becomd a pass, and the previous pass case below + # should be removed, or changed to a fail. + xpass "second backtrace, with error message" + } + -re "^bt no-filters\r\n#0 +$hex in func2 \\(\\)\r\n$gdb_prompt $" { + pass "second backtrace, without error message" + } + timeout { + fail "second backtrace (timeout)" + } +} + +clean_restart ${binfile} + +if ![runto breakpt] { + return -1 +} + +set test_name "check mi -stack-info-depth command, first time" +send_gdb "interpreter-exec mi \"-stack-info-depth\"\n" +gdb_expect { + -re "\\^done,depth=\"1\"\r\n$gdb_prompt $" { + pass $test_name + } + -re "\\^error,msg=\"Cannot access memory at address $hex\"\r\n$gdb_prompt $" { + xfail $test_name + } +} + +gdb_test "interpreter-exec mi \"-stack-info-depth\"" \ + "\\^done,depth=\"1\"" \ + "check mi -stack-info-depth command, second time" + +clean_restart ${binfile} + +if ![runto breakpt] { + return -1 +} + +set test_name "check mi -stack-list-frames command, first time" +send_gdb "interpreter-exec mi \"-stack-list-frames\"\n" +gdb_expect { + -re "\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"func2\"\}\\\]\r\n$gdb_prompt $" { + pass $test_name + } + -re "\\^error,msg=\"Cannot access memory at address $hex\"\r\n$gdb_prompt $" { + xfail $test_name + } +} + + +gdb_test "interpreter-exec mi \"-stack-list-frames\"" \ + "\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"func2\"\}\\\]" \ + "check mi -stack-list-frames command, second time"
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