# REQUIRES: x86-registered-target # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o # RUN: llvm-symbolizer 0x0 0x2 0x3 0x4 --obj=%t.o | FileCheck %s # This test makes sure we don't attempt to access out of the line table boundaries # if the last range is empty. # Produced from the following program: # int func(int a) { # return 1 + a; # } # compiled with clang -O3 -g -S # Edited by adding a redundant, empty last range. # The line table (llvm-dwarfdump --debug-line) looks like: # # Address Line Column File ISA Discriminator Flags # ------------------ ------ ------ ------ --- ------------- ------------- # 0x0000000000000000 1 0 1 0 0 is_stmt # 0x0000000000000000 2 12 1 0 0 is_stmt prologue_end # 0x0000000000000003 2 3 1 0 0 # 0x0000000000000003 3 3 1 0 0 # 0x0000000000000004 3 3 1 0 0 end_sequence # # 0x0 should pick the second line in the table - line 2, col 12 # CHECK: func # CHECK: /scratch/a.cpp:2:12 # 0x2 does not exist in the table, so we should pick the line with a # lower address that describes the range - in this case, the second line. # CHECK: func # CHECK: /scratch/a.cpp:2:12 # 0x3 also has a sequence of empty ranges, so we should pick the first range after # skipping the empty ones. # This also verifies we don't attempt to access outside boundaries. # CHECK: func # CHECK: /scratch/a.cpp:3:3 # CHECK: ?? # CHECK: ??:0:0 .text .file "a.cpp" .globl _Z4funci # -- Begin function _Z4funci .p2align 4, 0x90 .type _Z4funci,@function _Z4funci: # @_Z4funci .Lfunc_begin0: .file 1 "/llvm-project" "/scratch/a.cpp" .loc 1 1 0 # /scratch/a.cpp:1:0 .cfi_startproc # %bb.0: #DEBUG_VALUE: func:a <- $edi # kill: def $edi killed $edi def $rdi #DEBUG_VALUE: func:a <- $edi .loc 1 2 12 prologue_end # /scratch/a.cpp:2:12 leal 1(%rdi), %eax .loc 1 2 3 # /scratch/a.cpp:2:3 .loc 1 3 3 is_stmt 0 # this forms an empty range torgether with the previous. retq .Ltmp0: .Lfunc_end0: .size _Z4funci, .Lfunc_end0-_Z4funci .cfi_endproc # -- End function .section .debug_str,"MS",@progbits,1 .Linfo_string0: .asciz "clang version 7.0.1-6 (tags/RELEASE_701/final)" # string offset=0 .Linfo_string1: .asciz "/scratch/a.cpp" # string offset=47 .Linfo_string2: .asciz "/llvm-project" # string offset=97 .Linfo_string3: .asciz "_Z4funci" # string offset=146 .Linfo_string4: .asciz "func" # string offset=155 .Linfo_string5: .asciz "int" # string offset=160 .Linfo_string6: .asciz "a" # string offset=164 .section .debug_loc,"",@progbits .Ldebug_loc0: .quad .Lfunc_begin0-.Lfunc_begin0 .quad .Lfunc_end0-.Lfunc_begin0 .short 1 # Loc expr size .byte 85 # super-register DW_OP_reg5 .quad 0 .quad 0 .section .debug_abbrev,"",@progbits .byte 1 # Abbreviation Code .byte 17 # DW_TAG_compile_unit .byte 1 # DW_CHILDREN_yes .byte 37 # DW_AT_producer .byte 14 # DW_FORM_strp .byte 19 # DW_AT_language .byte 5 # DW_FORM_data2 .byte 3 # DW_AT_name .byte 14 # DW_FORM_strp .byte 16 # DW_AT_stmt_list .byte 23 # DW_FORM_sec_offset .byte 27 # DW_AT_comp_dir .byte 14 # DW_FORM_strp .ascii "\264B" # DW_AT_GNU_pubnames .byte 25 # DW_FORM_flag_present .byte 17 # DW_AT_low_pc .byte 1 # DW_FORM_addr .byte 18 # DW_AT_high_pc .byte 6 # DW_FORM_data4 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 2 # Abbreviation Code .byte 46 # DW_TAG_subprogram .byte 1 # DW_CHILDREN_yes .byte 17 # DW_AT_low_pc .byte 1 # DW_FORM_addr .byte 18 # DW_AT_high_pc .byte 6 # DW_FORM_data4 .byte 64 # DW_AT_frame_base .byte 24 # DW_FORM_exprloc .byte 110 # DW_AT_linkage_name .byte 14 # DW_FORM_strp .byte 3 # DW_AT_name .byte 14 # DW_FORM_strp .byte 58 # DW_AT_decl_file .byte 11 # DW_FORM_data1 .byte 59 # DW_AT_decl_line .byte 11 # DW_FORM_data1 .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 63 # DW_AT_external .byte 25 # DW_FORM_flag_present .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 3 # Abbreviation Code .byte 5 # DW_TAG_formal_parameter .byte 0 # DW_CHILDREN_no .byte 2 # DW_AT_location .byte 23 # DW_FORM_sec_offset .byte 3 # DW_AT_name .byte 14 # DW_FORM_strp .byte 58 # DW_AT_decl_file .byte 11 # DW_FORM_data1 .byte 59 # DW_AT_decl_line .byte 11 # DW_FORM_data1 .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 4 # Abbreviation Code .byte 36 # DW_TAG_base_type .byte 0 # DW_CHILDREN_no .byte 3 # DW_AT_name .byte 14 # DW_FORM_strp .byte 62 # DW_AT_encoding .byte 11 # DW_FORM_data1 .byte 11 # DW_AT_byte_size .byte 11 # DW_FORM_data1 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 0 # EOM(3) .section .debug_info,"",@progbits .Lcu_begin0: .long 91 # Length of Unit .short 4 # DWARF version number .long .debug_abbrev # Offset Into Abbrev. Section .byte 8 # Address Size (in bytes) .byte 1 # Abbrev [1] 0xb:0x54 DW_TAG_compile_unit .long .Linfo_string0 # DW_AT_producer .short 4 # DW_AT_language .long .Linfo_string1 # DW_AT_name .long .Lline_table_start0 # DW_AT_stmt_list .long .Linfo_string2 # DW_AT_comp_dir # DW_AT_GNU_pubnames .quad .Lfunc_begin0 # DW_AT_low_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .byte 2 # Abbrev [2] 0x2a:0x2d DW_TAG_subprogram .quad .Lfunc_begin0 # DW_AT_low_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .byte 1 # DW_AT_frame_base .byte 87 .long .Linfo_string3 # DW_AT_linkage_name .long .Linfo_string4 # DW_AT_name .byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_line .long 87 # DW_AT_type # DW_AT_external .byte 3 # Abbrev [3] 0x47:0xf DW_TAG_formal_parameter .long .Ldebug_loc0 # DW_AT_location .long .Linfo_string6 # DW_AT_name .byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_line .long 87 # DW_AT_type .byte 0 # End Of Children Mark .byte 4 # Abbrev [4] 0x57:0x7 DW_TAG_base_type .long .Linfo_string5 # DW_AT_name .byte 5 # DW_AT_encoding .byte 4 # DW_AT_byte_size .byte 0 # End Of Children Mark .section .debug_macinfo,"",@progbits .byte 0 # End Of Macro List Mark .section .debug_pubnames,"",@progbits .long .LpubNames_end0-.LpubNames_begin0 # Length of Public Names Info .LpubNames_begin0: .short 2 # DWARF Version .long .Lcu_begin0 # Offset of Compilation Unit Info .long 95 # Compilation Unit Length .long 42 # DIE offset .asciz "func" # External Name .long 0 # End Mark .LpubNames_end0: .section .debug_pubtypes,"",@progbits .long .LpubTypes_end0-.LpubTypes_begin0 # Length of Public Types Info .LpubTypes_begin0: .short 2 # DWARF Version .long .Lcu_begin0 # Offset of Compilation Unit Info .long 95 # Compilation Unit Length .long 87 # DIE offset .asciz "int" # External Name .long 0 # End Mark .LpubTypes_end0: .ident "clang version 7.0.1-6 (tags/RELEASE_701/final)" .section ".note.GNU-stack","",@progbits .addrsig .section .debug_line,"",@progbits .Lline_table_start0: