Index: lld/test/ELF/debug-line-obj.s =================================================================== --- /dev/null +++ lld/test/ELF/debug-line-obj.s @@ -0,0 +1,177 @@ +# REQUIRES: x86 +# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux -dwarf-version=5 %s -o %t.o +# RUN: not ld.lld %t.o -o %t1 2>&1 | FileCheck %s + +# When compiling with -ffunction-sections, .debug_line may contain descriptions +# of locations from the different text sections. Until relocated such +# descriptions might contain overlapping offsets. Check LLD is able to report +# the error locations correctly in this case. + +# CHECK: error: undefined symbol: foo() +# CHECK-NEXT: >>> referenced by test.cpp:2 +# CHECK-NEXT: >>> {{.*}}.o:(bar()) +# CHECK: error: undefined symbol: foo() +# CHECK-NEXT: >>> referenced by test.cpp:3 +# CHECK-NEXT: >>> {{.*}}.o:(baz()) + +# The code below is the reduced version of the output +# from the following invocation and source: +# +# // test.cpp: +# int foo(); +# int bar() { return foo(); } +# int baz() { return foo(); } +# +# clang -gdwarf-5 -ffunction-sections test.cpp -o test.s -S + +.text +.file "test.cpp" +.section .text._Z3barv,"ax",@progbits +.globl _Z3barv +.type _Z3barv,@function +_Z3barv: +.Lfunc_begin0: + .file 0 "/path" "test.cpp" md5 0x9ff11a8404ab4d032ee2dd4f5f8c4140 + .file 1 "test.cpp" md5 0x9ff11a8404ab4d032ee2dd4f5f8c4140 + .loc 1 2 0 # test.cpp:2:0 + .loc 1 2 20 prologue_end # test.cpp:2:20 + callq _Z3foov + .loc 1 2 13 is_stmt 0 # test.cpp:2:13 +.Lfunc_end0: +.size _Z3barv, .Lfunc_end0-_Z3barv + # -- End function +.section .text._Z3bazv,"ax",@progbits +.globl _Z3bazv # -- Begin function _Z3bazv + .type _Z3bazv,@function +_Z3bazv: # @_Z3bazv +.Lfunc_begin1: + .loc 1 3 0 is_stmt 1 # test.cpp:3:0 + .loc 1 3 20 prologue_end # test.cpp:3:20 + callq _Z3foov + .loc 1 3 13 is_stmt 0 # test.cpp:3:13 +.Lfunc_end1: + .size _Z3bazv, .Lfunc_end1-_Z3bazv + +.section .debug_str,"MS",@progbits,1 +.Linfo_string0: + .asciz "stub" + +.section .debug_str_offsets,"",@progbits + .long 8 + .short 5 + .short 0 +.Lstr_offsets_base0: + .long .Linfo_string0 + +.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 37 # DW_FORM_strx1 + .byte 19 # DW_AT_language + .byte 5 # DW_FORM_data2 + .byte 3 # DW_AT_name + .byte 37 # DW_FORM_strx1 + .byte 114 # DW_AT_str_offsets_base + .byte 23 # DW_FORM_sec_offset + .byte 16 # DW_AT_stmt_list + .byte 23 # DW_FORM_sec_offset + .byte 27 # DW_AT_comp_dir + .byte 37 # DW_FORM_strx1 + .byte 115 # DW_AT_addr_base + .byte 23 # DW_FORM_sec_offset + .byte 17 # DW_AT_low_pc + .byte 1 # DW_FORM_addr + .byte 85 # DW_AT_ranges + .byte 35 # DW_FORM_rnglistx + .byte 116 # DW_AT_rnglists_base + .byte 23 # DW_FORM_sec_offset + .byte 0 # EOM(1) + .byte 0 # EOM(2) + .byte 2 # Abbreviation Code + .byte 46 # DW_TAG_subprogram + .byte 0 # DW_CHILDREN_no + .byte 17 # DW_AT_low_pc + .byte 27 # DW_FORM_addrx + .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 37 # DW_FORM_strx1 + .byte 3 # DW_AT_name + .byte 37 # DW_FORM_strx1 + .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 36 # DW_TAG_base_type + .byte 0 # DW_CHILDREN_no + .byte 3 # DW_AT_name + .byte 37 # DW_FORM_strx1 + .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 .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit +.Ldebug_info_start0: + .short 5 # DWARF version number + .byte 1 # DWARF Unit Type + .byte 8 # Address Size (in bytes) + .long .debug_abbrev # Offset Into Abbrev. Section + .byte 1 # Abbrev [1] 0xc:0x44 DW_TAG_compile_unit + .byte 0 # DW_AT_producer + .short 4 # DW_AT_language + .byte 0 # DW_AT_name + .long .Lstr_offsets_base0 # DW_AT_str_offsets_base + .long .Lline_table_start0 # DW_AT_stmt_list + .byte 2 # DW_AT_comp_dir + .long 0 # DW_AT_addr_base + .quad 0 # DW_AT_low_pc + .byte 0 # DW_AT_ranges + .long 0 # DW_AT_rnglists_base + .byte 2 # Abbrev [2] 0x2b:0x10 DW_TAG_subprogram + .byte 0 # DW_AT_low_pc + .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc + .byte 1 # DW_AT_frame_base + .byte 86 + .byte 3 # DW_AT_linkage_name + .byte 0 # DW_AT_name + .byte 1 # DW_AT_decl_file + .byte 2 # DW_AT_decl_line + .long 75 # DW_AT_type + # DW_AT_external + .byte 2 # Abbrev [2] 0x3b:0x10 DW_TAG_subprogram + .byte 1 # DW_AT_low_pc + .long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc + .byte 1 # DW_AT_frame_base + .byte 86 + .byte 6 # DW_AT_linkage_name + .byte 0 # DW_AT_name + .byte 1 # DW_AT_decl_file + .byte 3 # DW_AT_decl_line + .long 75 # DW_AT_type + # DW_AT_external + .byte 3 # Abbrev [3] 0x4b:0x4 DW_TAG_base_type + .byte 0 # DW_AT_name + .byte 5 # DW_AT_encoding + .byte 4 # DW_AT_byte_size + .byte 0 # End Of Children Mark +.Ldebug_info_end0: + +.section .debug_line,"",@progbits +.Lline_table_start0: