a05a36a5fc
See the description here: https://sourceware.org/ml/gdb-patches/2014-08/msg00283.html This patch keeps track of whether the current line has seen a non-zero discriminator, and if so coalesces consecutive entries for the same line (by ignoring all entries after the first). gdb/ChangeLog: PR 17276 * dwarf2read.c (dwarf_record_line_p): New function. (dwarf_decode_lines_1): Ignore subsequent line number entries for the same line if any entry had a non-zero discriminator. gdb/testsuite/ChangeLog: * gdb.dwarf2/dw2-single-line-discriminators.S: New file. * gdb.dwarf2/dw2-single-line-discriminators.c: New file. * gdb.dwarf2/dw2-single-line-discriminators.exp: New file.
281 lines
11 KiB
ArmAsm
281 lines
11 KiB
ArmAsm
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2014 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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/* This was made from dw2-single-line-discriminators.c using
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clang -dA -S -g
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and then hand-editing the assembly a bit (simplify paths,
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tweak so gas accepts it). */
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.text
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.file "dw2-single-line-discriminators.c"
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.section .debug_info,"",@progbits
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.Lsection_info:
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.section .debug_abbrev,"",@progbits
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.Lsection_abbrev:
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.section .debug_line,"",@progbits
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.Lsection_line:
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.section .debug_pubnames,"",@progbits
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.section .debug_pubtypes,"",@progbits
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.section .debug_str,"MS",@progbits,1
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.Linfo_string:
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.section .debug_loc,"",@progbits
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.Lsection_debug_loc:
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.section .debug_ranges,"",@progbits
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.Ldebug_range:
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.file 1 "gdb.dwarf2/dw2-single-line-discriminators.c"
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.text
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.globl main
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.align 16, 0x90
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.type main,@function
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main: # @main
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.Lfunc_begin0:
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.loc 1 22 0 # dw2-single-line-discriminators.c:22:0
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.cfi_startproc
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# BB#0:
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pushq %rbp
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.Ltmp0:
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.cfi_def_cfa_offset 16
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.Ltmp1:
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.cfi_offset %rbp, -16
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movq %rsp, %rbp
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.Ltmp2:
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.cfi_def_cfa_register %rbp
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movl $0, -4(%rbp)
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.loc 1 26 3 prologue_end # dw2-single-line-discriminators.c:26:3
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.Ltmp3:
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movl $0, x
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.loc 1 28 8 # dw2-single-line-discriminators.c:28:8
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.Ltmp4:
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movl $0, -8(%rbp)
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.LBB0_1: # =>This Inner Loop Header: Depth=1
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.loc 1 28 8 discriminator 4 # dw2-single-line-discriminators.c:28:8
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.Ltmp5:
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cmpl $10, -8(%rbp)
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jge .LBB0_4
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.Ltmp6:
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# BB#2: # in Loop: Header=BB0_1 Depth=1
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.loc 1 28 28 discriminator 2 # dw2-single-line-discriminators.c:28:28
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jmp .LBB0_3
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.Ltmp7:
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.LBB0_3: # in Loop: Header=BB0_1 Depth=1
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.loc 1 28 23 discriminator 3 # dw2-single-line-discriminators.c:28:23
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movl -8(%rbp), %eax
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addl $1, %eax
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movl %eax, -8(%rbp)
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jmp .LBB0_1
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.Ltmp8:
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.LBB0_4:
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movl $0, %eax
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.loc 1 30 3 # dw2-single-line-discriminators.c:30:3
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popq %rbp
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retq
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.Ltmp9:
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.Ltmp10:
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.size main, .Ltmp10-main
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.Lfunc_end0:
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.cfi_endproc
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.type x,@object # @x
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.comm x,4,4
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.Ldebug_end1:
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.section .debug_str,"MS",@progbits,1
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.Linfo_string0:
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.asciz "clang version (trunk r215195)"
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.Linfo_string1:
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.asciz "dw2-single-line-discriminators.c"
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.Linfo_string2:
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.asciz "/tmp/obj/gdb/testsuite"
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.Linfo_string3:
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.asciz "x"
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.Linfo_string4:
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.asciz "int"
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.Linfo_string5:
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.asciz "main"
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.Linfo_string6:
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.asciz "i"
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.section .debug_info,"",@progbits
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.L.debug_info_begin0:
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.long 108 # Length of Unit
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.short 4 # DWARF version number
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.long .Lsection_abbrev # Offset Into Abbrev. Section
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.byte 8 # Address Size (in bytes)
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.byte 1 # Abbrev [1] 0xb:0x65 DW_TAG_compile_unit
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.long .Linfo_string0 # DW_AT_producer
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.short 12 # DW_AT_language
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.long .Linfo_string1 # DW_AT_name
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.long .Lline_table_start0 # DW_AT_stmt_list
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.long .Linfo_string2 # DW_AT_comp_dir
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.quad .Lfunc_begin0 # DW_AT_low_pc
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.Lset0 = .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
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.long .Lset0
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.byte 2 # Abbrev [2] 0x2a:0x15 DW_TAG_variable
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.long .Linfo_string3 # DW_AT_name
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.long 63 # DW_AT_type
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# DW_AT_external
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.byte 1 # DW_AT_decl_file
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.byte 18 # DW_AT_decl_line
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.byte 9 # DW_AT_location
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.byte 3
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.quad x
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.byte 3 # Abbrev [3] 0x3f:0x7 DW_TAG_base_type
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.long .Linfo_string4 # DW_AT_name
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.byte 5 # DW_AT_encoding
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.byte 4 # DW_AT_byte_size
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.byte 4 # Abbrev [4] 0x46:0x29 DW_TAG_subprogram
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.quad .Lfunc_begin0 # DW_AT_low_pc
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.Lset1 = .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
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.long .Lset1
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.byte 1 # DW_AT_frame_base
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.byte 86
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.long .Linfo_string5 # DW_AT_name
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.byte 1 # DW_AT_decl_file
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.byte 21 # DW_AT_decl_line
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.long 63 # DW_AT_type
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# DW_AT_external
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.byte 1 # DW_AT_accessibility
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# DW_ACCESS_public
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.byte 5 # Abbrev [5] 0x60:0xe DW_TAG_variable
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.byte 2 # DW_AT_location
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.byte 145
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.byte 120
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.long .Linfo_string6 # DW_AT_name
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.byte 1 # DW_AT_decl_file
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.byte 23 # DW_AT_decl_line
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.long 63 # DW_AT_type
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.byte 0 # End Of Children Mark
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.byte 0 # End Of Children Mark
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.L.debug_info_end0:
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.section .debug_abbrev,"",@progbits
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.byte 1 # Abbreviation Code
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.byte 17 # DW_TAG_compile_unit
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.byte 1 # DW_CHILDREN_yes
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.byte 37 # DW_AT_producer
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.byte 14 # DW_FORM_strp
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.byte 19 # DW_AT_language
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.byte 5 # DW_FORM_data2
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.byte 3 # DW_AT_name
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.byte 14 # DW_FORM_strp
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.byte 16 # DW_AT_stmt_list
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.byte 23 # DW_FORM_sec_offset
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.byte 27 # DW_AT_comp_dir
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.byte 14 # DW_FORM_strp
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 2 # Abbreviation Code
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.byte 52 # DW_TAG_variable
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.byte 0 # DW_CHILDREN_no
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.byte 3 # DW_AT_name
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.byte 14 # DW_FORM_strp
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 63 # DW_AT_external
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.byte 25 # DW_FORM_flag_present
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.byte 58 # DW_AT_decl_file
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.byte 11 # DW_FORM_data1
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.byte 59 # DW_AT_decl_line
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.byte 11 # DW_FORM_data1
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.byte 2 # DW_AT_location
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.byte 24 # DW_FORM_exprloc
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 3 # Abbreviation Code
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.byte 36 # DW_TAG_base_type
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.byte 0 # DW_CHILDREN_no
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.byte 3 # DW_AT_name
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.byte 14 # DW_FORM_strp
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.byte 62 # DW_AT_encoding
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.byte 11 # DW_FORM_data1
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.byte 11 # DW_AT_byte_size
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.byte 11 # DW_FORM_data1
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 4 # Abbreviation Code
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.byte 46 # DW_TAG_subprogram
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.byte 1 # DW_CHILDREN_yes
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 64 # DW_AT_frame_base
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.byte 24 # DW_FORM_exprloc
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.byte 3 # DW_AT_name
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.byte 14 # DW_FORM_strp
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.byte 58 # DW_AT_decl_file
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.byte 11 # DW_FORM_data1
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.byte 59 # DW_AT_decl_line
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.byte 11 # DW_FORM_data1
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 63 # DW_AT_external
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.byte 25 # DW_FORM_flag_present
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.byte 50 # DW_AT_accessibility
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.byte 11 # DW_FORM_data1
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 5 # Abbreviation Code
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.byte 52 # DW_TAG_variable
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.byte 0 # DW_CHILDREN_no
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.byte 2 # DW_AT_location
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.byte 24 # DW_FORM_exprloc
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.byte 3 # DW_AT_name
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.byte 14 # DW_FORM_strp
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.byte 58 # DW_AT_decl_file
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.byte 11 # DW_FORM_data1
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.byte 59 # DW_AT_decl_line
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.byte 11 # DW_FORM_data1
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 0 # EOM(3)
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.section .debug_ranges,"",@progbits
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.section .debug_loc,"",@progbits
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.section .debug_pubnames,"",@progbits
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.Lset2 = .LpubNames_end0-.LpubNames_begin0 # Length of Public Names Info
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.long .Lset2
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.LpubNames_begin0:
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.short 2 # DWARF Version
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.long .L.debug_info_begin0 # Offset of Compilation Unit Info
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.Lset3 = .L.debug_info_end0-.L.debug_info_begin0 # Compilation Unit Length
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.long .Lset3
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.long 70 # DIE offset
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.asciz "main" # External Name
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.long 42 # DIE offset
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.asciz "x" # External Name
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.long 0 # End Mark
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.LpubNames_end0:
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.section .debug_pubtypes,"",@progbits
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.Lset4 = .LpubTypes_end0-.LpubTypes_begin0 # Length of Public Types Info
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.long .Lset4
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.LpubTypes_begin0:
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.short 2 # DWARF Version
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.long .L.debug_info_begin0 # Offset of Compilation Unit Info
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.Lset5 = .L.debug_info_end0-.L.debug_info_begin0 # Compilation Unit Length
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.long .Lset5
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.long 63 # DIE offset
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.asciz "int" # External Name
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.long 0 # End Mark
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.LpubTypes_end0:
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.ident "clang version (trunk r215195)"
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.section ".note.GNU-stack","",@progbits
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.section .debug_line,"",@progbits
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.Lline_table_start0:
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