# REQUIRES: system-linux # RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %s -o %tmain.o # RUN: %clang %cflags -no-pie %s -o %t.exe -Wl,-q # RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections # RUN: llvm-dwarfdump --show-children --name=main --debug-info %t.bolt \ # RUN: | FileCheck %s # CHECK: DW_TAG_inlined_subroutine # CHECK: DW_AT_low_pc # CHECK-SAME: 0x0000000000000000 # CHECK: DW_TAG_call_site # CHECK: DW_AT_call_return_pc # CHECK-SAME: 0x0000000000000000 ## Test that llvm-bolt correctly updates DIEs corresponding to deleted code. # Test case built from the following source using: # # clang -O2 -g -gdwarf-5 ... # # Assembly modified with "je" -> "jmp" to introduce unreachable block. # # extern void puts(const char *); # # static void foo() { # puts("hi"); # } # # int main(int argc, char **argv) { # if (argc) # foo(); # return 0; # } .text .file "unreachable.c" .file 0 "." "unreachable.c" md5 0xd268d8460ea246544a440d4d42235947 .globl main # -- Begin function main .p2align 4, 0x90 .type main,@function main: # @main .Lfunc_begin0: .loc 0 7 0 # unreachable.c:7:0 .cfi_startproc # %bb.0: #DEBUG_VALUE: main:argc <- $edi #DEBUG_VALUE: main:argv <- $rsi .loc 0 8 7 prologue_end # unreachable.c:8:7 testl %edi, %edi .Ltmp0: .loc 0 8 7 is_stmt 0 # unreachable.c:8:7 jmp .LBB0_2 .Ltmp1: # %bb.1: #DEBUG_VALUE: main:argc <- $edi #DEBUG_VALUE: main:argv <- $rsi pushq %rax .cfi_def_cfa_offset 16 .Ltmp2: .loc 0 4 3 is_stmt 1 # unreachable.c:4:3 movl $.L.str, %edi .Ltmp3: #DEBUG_VALUE: main:argc <- [DW_OP_LLVM_entry_value 1] $edi callq puts .Ltmp4: #DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi .loc 0 0 3 is_stmt 0 # unreachable.c:0:3 addq $8, %rsp .Ltmp5: .cfi_def_cfa_offset 8 .LBB0_2: #DEBUG_VALUE: main:argc <- [DW_OP_LLVM_entry_value 1] $edi #DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi .loc 0 10 3 is_stmt 1 # unreachable.c:10:3 xorl %eax, %eax retq .Ltmp6: .Lfunc_end0: .size main, .Lfunc_end0-main .cfi_endproc # -- End function .type .L.str,@object # @.str .section .rodata.str1.1,"aMS",@progbits,1 .L.str: .asciz "hi" .size .L.str, 3 .section .debug_loclists,"",@progbits .long .Ldebug_list_header_end0-.Ldebug_list_header_start0 # Length .Ldebug_list_header_start0: .short 5 # Version .byte 8 # Address size .byte 0 # Segment selector size .long 2 # Offset entry count .Lloclists_table_base0: .long .Ldebug_loc0-.Lloclists_table_base0 .long .Ldebug_loc1-.Lloclists_table_base0 .Ldebug_loc0: .byte 4 # DW_LLE_offset_pair .uleb128 .Lfunc_begin0-.Lfunc_begin0 # starting offset .uleb128 .Ltmp3-.Lfunc_begin0 # ending offset .byte 1 # Loc expr size .byte 85 # super-register DW_OP_reg5 .byte 4 # DW_LLE_offset_pair .uleb128 .Ltmp3-.Lfunc_begin0 # starting offset .uleb128 .Lfunc_end0-.Lfunc_begin0 # ending offset .byte 4 # Loc expr size .byte 163 # DW_OP_entry_value .byte 1 # 1 .byte 85 # super-register DW_OP_reg5 .byte 159 # DW_OP_stack_value .byte 0 # DW_LLE_end_of_list .Ldebug_loc1: .byte 4 # DW_LLE_offset_pair .uleb128 .Lfunc_begin0-.Lfunc_begin0 # starting offset .uleb128 .Ltmp4-.Lfunc_begin0 # ending offset .byte 1 # Loc expr size .byte 84 # DW_OP_reg4 .byte 4 # DW_LLE_offset_pair .uleb128 .Ltmp4-.Lfunc_begin0 # starting offset .uleb128 .Lfunc_end0-.Lfunc_begin0 # ending offset .byte 4 # Loc expr size .byte 163 # DW_OP_entry_value .byte 1 # 1 .byte 84 # DW_OP_reg4 .byte 159 # DW_OP_stack_value .byte 0 # DW_LLE_end_of_list .Ldebug_list_header_end0: .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 17 # DW_AT_low_pc .byte 27 # DW_FORM_addrx .byte 18 # DW_AT_high_pc .byte 6 # DW_FORM_data4 .byte 115 # DW_AT_addr_base .byte 23 # DW_FORM_sec_offset .ascii "\214\001" # DW_AT_loclists_base .byte 23 # DW_FORM_sec_offset .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 2 # Abbreviation Code .byte 52 # DW_TAG_variable .byte 0 # DW_CHILDREN_no .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 58 # DW_AT_decl_file .byte 11 # DW_FORM_data1 .byte 59 # DW_AT_decl_line .byte 11 # DW_FORM_data1 .byte 2 # DW_AT_location .byte 24 # DW_FORM_exprloc .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 3 # Abbreviation Code .byte 1 # DW_TAG_array_type .byte 1 # DW_CHILDREN_yes .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 4 # Abbreviation Code .byte 33 # DW_TAG_subrange_type .byte 0 # DW_CHILDREN_no .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 55 # DW_AT_count .byte 11 # DW_FORM_data1 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 5 # 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 6 # Abbreviation Code .byte 36 # DW_TAG_base_type .byte 0 # DW_CHILDREN_no .byte 3 # DW_AT_name .byte 37 # DW_FORM_strx1 .byte 11 # DW_AT_byte_size .byte 11 # DW_FORM_data1 .byte 62 # DW_AT_encoding .byte 11 # DW_FORM_data1 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 7 # Abbreviation Code .byte 46 # DW_TAG_subprogram .byte 0 # DW_CHILDREN_no .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 32 # DW_AT_inline .byte 33 # DW_FORM_implicit_const .byte 1 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 8 # Abbreviation Code .byte 46 # DW_TAG_subprogram .byte 1 # DW_CHILDREN_yes .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 122 # DW_AT_call_all_calls .byte 25 # DW_FORM_flag_present .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 39 # DW_AT_prototyped .byte 25 # DW_FORM_flag_present .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 9 # Abbreviation Code .byte 5 # DW_TAG_formal_parameter .byte 0 # DW_CHILDREN_no .byte 2 # DW_AT_location .byte 34 # DW_FORM_loclistx .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 0 # EOM(1) .byte 0 # EOM(2) .byte 10 # Abbreviation Code .byte 29 # DW_TAG_inlined_subroutine .byte 0 # DW_CHILDREN_no .byte 49 # DW_AT_abstract_origin .byte 19 # DW_FORM_ref4 .byte 17 # DW_AT_low_pc .byte 27 # DW_FORM_addrx .byte 18 # DW_AT_high_pc .byte 6 # DW_FORM_data4 .byte 88 # DW_AT_call_file .byte 11 # DW_FORM_data1 .byte 89 # DW_AT_call_line .byte 11 # DW_FORM_data1 .byte 87 # DW_AT_call_column .byte 11 # DW_FORM_data1 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 11 # Abbreviation Code .byte 72 # DW_TAG_call_site .byte 0 # DW_CHILDREN_no .byte 127 # DW_AT_call_origin .byte 19 # DW_FORM_ref4 .byte 125 # DW_AT_call_return_pc .byte 27 # DW_FORM_addrx .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 12 # Abbreviation Code .byte 46 # DW_TAG_subprogram .byte 1 # DW_CHILDREN_yes .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 39 # DW_AT_prototyped .byte 25 # DW_FORM_flag_present .byte 60 # DW_AT_declaration .byte 25 # DW_FORM_flag_present .byte 63 # DW_AT_external .byte 25 # DW_FORM_flag_present .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 13 # Abbreviation Code .byte 5 # DW_TAG_formal_parameter .byte 0 # DW_CHILDREN_no .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 14 # Abbreviation Code .byte 15 # DW_TAG_pointer_type .byte 0 # DW_CHILDREN_no .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 15 # Abbreviation Code .byte 38 # DW_TAG_const_type .byte 0 # DW_CHILDREN_no .byte 73 # DW_AT_type .byte 19 # DW_FORM_ref4 .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:0x95 DW_TAG_compile_unit .byte 0 # DW_AT_producer .short 12 # DW_AT_language .byte 1 # 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 .byte 1 # DW_AT_low_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .long .Laddr_table_base0 # DW_AT_addr_base .long .Lloclists_table_base0 # DW_AT_loclists_base .byte 2 # Abbrev [2] 0x27:0xa DW_TAG_variable .long 49 # DW_AT_type .byte 0 # DW_AT_decl_file .byte 4 # DW_AT_decl_line .byte 2 # DW_AT_location .byte 161 .byte 0 .byte 3 # Abbrev [3] 0x31:0xc DW_TAG_array_type .long 61 # DW_AT_type .byte 4 # Abbrev [4] 0x36:0x6 DW_TAG_subrange_type .long 65 # DW_AT_type .byte 3 # DW_AT_count .byte 0 # End Of Children Mark .byte 5 # Abbrev [5] 0x3d:0x4 DW_TAG_base_type .byte 3 # DW_AT_name .byte 6 # DW_AT_encoding .byte 1 # DW_AT_byte_size .byte 6 # Abbrev [6] 0x41:0x4 DW_TAG_base_type .byte 4 # DW_AT_name .byte 8 # DW_AT_byte_size .byte 7 # DW_AT_encoding .byte 7 # Abbrev [7] 0x45:0x4 DW_TAG_subprogram .byte 5 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 3 # DW_AT_decl_line # DW_AT_inline .byte 8 # Abbrev [8] 0x49:0x35 DW_TAG_subprogram .byte 1 # DW_AT_low_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .byte 1 # DW_AT_frame_base .byte 87 # DW_AT_call_all_calls .byte 7 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 7 # DW_AT_decl_line # DW_AT_prototyped .long 146 # DW_AT_type # DW_AT_external .byte 9 # Abbrev [9] 0x58:0x9 DW_TAG_formal_parameter .byte 0 # DW_AT_location .byte 9 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 7 # DW_AT_decl_line .long 146 # DW_AT_type .byte 9 # Abbrev [9] 0x61:0x9 DW_TAG_formal_parameter .byte 1 # DW_AT_location .byte 10 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 7 # DW_AT_decl_line .long 150 # DW_AT_type .byte 10 # Abbrev [10] 0x6a:0xd DW_TAG_inlined_subroutine .long 69 # DW_AT_abstract_origin .byte 2 # DW_AT_low_pc .long .Ltmp5-.Ltmp2 # DW_AT_high_pc .byte 0 # DW_AT_call_file .byte 9 # DW_AT_call_line .byte 5 # DW_AT_call_column .byte 11 # Abbrev [11] 0x77:0x6 DW_TAG_call_site .long 126 # DW_AT_call_origin .byte 3 # DW_AT_call_return_pc .byte 0 # End Of Children Mark .byte 12 # Abbrev [12] 0x7e:0xa DW_TAG_subprogram .byte 6 # DW_AT_name .byte 0 # DW_AT_decl_file .byte 1 # DW_AT_decl_line # DW_AT_prototyped # DW_AT_declaration # DW_AT_external .byte 13 # Abbrev [13] 0x82:0x5 DW_TAG_formal_parameter .long 136 # DW_AT_type .byte 0 # End Of Children Mark .byte 14 # Abbrev [14] 0x88:0x5 DW_TAG_pointer_type .long 141 # DW_AT_type .byte 15 # Abbrev [15] 0x8d:0x5 DW_TAG_const_type .long 61 # DW_AT_type .byte 5 # Abbrev [5] 0x92:0x4 DW_TAG_base_type .byte 8 # DW_AT_name .byte 5 # DW_AT_encoding .byte 4 # DW_AT_byte_size .byte 14 # Abbrev [14] 0x96:0x5 DW_TAG_pointer_type .long 155 # DW_AT_type .byte 14 # Abbrev [14] 0x9b:0x5 DW_TAG_pointer_type .long 61 # DW_AT_type .byte 0 # End Of Children Mark .Ldebug_info_end0: .section .debug_str_offsets,"",@progbits .long 48 # Length of String Offsets Set .short 5 .short 0 .Lstr_offsets_base0: .section .debug_str,"MS",@progbits,1 .Linfo_string0: .asciz "clang version 15.0.7 " # string offset=0 .Linfo_string1: .asciz "unreachable.c" # string offset=69 .Linfo_string2: .asciz "." # string offset=83 .Linfo_string3: .asciz "char" # string offset=85 .Linfo_string4: .asciz "__ARRAY_SIZE_TYPE__" # string offset=90 .Linfo_string5: .asciz "foo" # string offset=110 .Linfo_string6: .asciz "puts" # string offset=114 .Linfo_string7: .asciz "main" # string offset=119 .Linfo_string8: .asciz "int" # string offset=124 .Linfo_string9: .asciz "argc" # string offset=128 .Linfo_string10: .asciz "argv" # string offset=133 .section .debug_str_offsets,"",@progbits .long .Linfo_string0 .long .Linfo_string1 .long .Linfo_string2 .long .Linfo_string3 .long .Linfo_string4 .long .Linfo_string5 .long .Linfo_string6 .long .Linfo_string7 .long .Linfo_string8 .long .Linfo_string9 .long .Linfo_string10 .section .debug_addr,"",@progbits .long .Ldebug_addr_end0-.Ldebug_addr_start0 # Length of contribution .Ldebug_addr_start0: .short 5 # DWARF version number .byte 8 # Address size .byte 0 # Segment selector size .Laddr_table_base0: .quad .L.str .quad .Lfunc_begin0 .quad .Ltmp2 .quad .Ltmp4 .Ldebug_addr_end0: .section .debug_line,"",@progbits .Lline_table_start0: