# This test ensures that dwarfdump doesn't crash for malformed DWARF where a # DIE references itself. # # Source: # void f(); # __attribute__((always_inline)) void g() { # f(); # } # void h() { # g(); # }; # # Compile with: # clang inlined.c -S -g -o inlined.s # # RUN: llvm-mc %s -filetype obj -triple x86_64-apple-darwin -o - \ # RUN: | llvm-dwarfdump -debug-info - \ # RUN: | FileCheck %s # CHECK: 0x0000005a: DW_TAG_inlined_subroutine # CHECK-NEXT: DW_AT_abstract_origin (0x0000005a) .section __TEXT,__text,regular,pure_instructions .macosx_version_min 10, 13 .globl _g ## -- Begin function g .p2align 4, 0x90 _g: ## @g Lfunc_begin0: .file 1 "inlined.c" .loc 1 2 0 ## inlined.c:2:0 .cfi_startproc ## %bb.0: ## %entry pushq %rbp .cfi_def_cfa_offset 16 .cfi_offset %rbp, -16 movq %rsp, %rbp .cfi_def_cfa_register %rbp Ltmp0: .loc 1 3 3 prologue_end ## inlined.c:3:3 movb $0, %al callq _f .loc 1 4 1 ## inlined.c:4:1 popq %rbp retq Ltmp1: Lfunc_end0: .cfi_endproc ## -- End function .globl _h ## -- Begin function h .p2align 4, 0x90 _h: ## @h Lfunc_begin1: .loc 1 5 0 ## inlined.c:5:0 .cfi_startproc ## %bb.0: ## %entry pushq %rbp .cfi_def_cfa_offset 16 .cfi_offset %rbp, -16 movq %rsp, %rbp .cfi_def_cfa_register %rbp Ltmp2: .loc 1 3 3 prologue_end ## inlined.c:3:3 movb $0, %al callq _f Ltmp3: .loc 1 7 1 ## inlined.c:7:1 popq %rbp retq Ltmp4: Lfunc_end1: .cfi_endproc ## -- End function .section __DWARF,__debug_str,regular,debug Linfo_string: .asciz "clang version 7.0.0 " ## string offset=0 .asciz "inlined.c" ## string offset=21 .asciz "/private/tmp" ## string offset=31 .asciz "g" ## string offset=44 .asciz "h" ## string offset=46 .section __DWARF,__debug_abbrev,regular,debug Lsection_abbrev: .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 .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 0 ## DW_CHILDREN_no .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 49 ## DW_AT_abstract_origin .byte 19 ## DW_FORM_ref4 .byte 0 ## EOM(1) .byte 0 ## EOM(2) .byte 3 ## Abbreviation Code .byte 46 ## DW_TAG_subprogram .byte 0 ## DW_CHILDREN_no .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 63 ## DW_AT_external .byte 25 ## DW_FORM_flag_present .byte 32 ## DW_AT_inline .byte 11 ## DW_FORM_data1 .byte 0 ## EOM(1) .byte 0 ## EOM(2) .byte 4 ## 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 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 63 ## DW_AT_external .byte 25 ## DW_FORM_flag_present .byte 0 ## EOM(1) .byte 0 ## EOM(2) .byte 5 ## 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 1 ## DW_FORM_addr .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 0 ## EOM(1) .byte 0 ## EOM(2) .byte 0 ## EOM(3) .section __DWARF,__debug_info,regular,debug Lsection_info: Lcu_begin0: .long 107 ## Length of Unit .short 4 ## DWARF version number Lset0 = Lsection_abbrev-Lsection_abbrev ## Offset Into Abbrev. Section .long Lset0 .byte 8 ## Address Size (in bytes) .byte 1 ## Abbrev [1] 0xb:0x64 DW_TAG_compile_unit .long 0 ## DW_AT_producer .short 12 ## DW_AT_language .long 21 ## DW_AT_name Lset1 = Lline_table_start0-Lsection_line ## DW_AT_stmt_list .long Lset1 .long 31 ## DW_AT_comp_dir .quad Lfunc_begin0 ## DW_AT_low_pc Lset2 = Lfunc_end1-Lfunc_begin0 ## DW_AT_high_pc .long Lset2 .byte 2 ## Abbrev [2] 0x2a:0x13 DW_TAG_subprogram .quad Lfunc_begin0 ## DW_AT_low_pc Lset3 = Lfunc_end0-Lfunc_begin0 ## DW_AT_high_pc .long Lset3 .byte 1 ## DW_AT_frame_base .byte 86 .long 61 ## DW_AT_abstract_origin .byte 3 ## Abbrev [3] 0x3d:0x8 DW_TAG_subprogram .long 44 ## DW_AT_name .byte 1 ## DW_AT_decl_file .byte 2 ## DW_AT_decl_line ## DW_AT_external .byte 1 ## DW_AT_inline .byte 4 ## Abbrev [4] 0x45:0x29 DW_TAG_subprogram .quad Lfunc_begin1 ## DW_AT_low_pc Lset4 = Lfunc_end1-Lfunc_begin1 ## DW_AT_high_pc .long Lset4 .byte 1 ## DW_AT_frame_base .byte 86 .long 46 ## DW_AT_name .byte 1 ## DW_AT_decl_file .byte 5 ## DW_AT_decl_line ## DW_AT_external .byte 5 ## Abbrev [5] 0x5a:0x13 DW_TAG_inlined_subroutine .long 90 ## DW_AT_abstract_origin <- We modified the value so the DIE references itself. .quad Ltmp2 ## DW_AT_low_pc Lset5 = Ltmp3-Ltmp2 ## DW_AT_high_pc .long Lset5 .byte 1 ## DW_AT_call_file .byte 6 ## DW_AT_call_line .byte 0 ## End Of Children Mark .byte 0 ## End Of Children Mark .section __DWARF,__debug_ranges,regular,debug Ldebug_range: .section __DWARF,__debug_macinfo,regular,debug Ldebug_macinfo: Lcu_macro_begin0: .byte 0 ## End Of Macro List Mark .section __DWARF,__apple_names,regular,debug Lnames_begin: .long 1212240712 ## Header Magic .short 1 ## Header Version .short 0 ## Header Hash Function .long 2 ## Header Bucket Count .long 2 ## Header Hash Count .long 12 ## Header Data Length .long 0 ## HeaderData Die Offset Base .long 1 ## HeaderData Atom Count .short 1 ## DW_ATOM_die_offset .short 6 ## DW_FORM_data4 .long 0 ## Bucket 0 .long 1 ## Bucket 1 .long 177676 ## Hash in Bucket 0 .long 177677 ## Hash in Bucket 1 .long LNames0-Lnames_begin ## Offset in Bucket 0 .long LNames1-Lnames_begin ## Offset in Bucket 1 LNames0: .long 44 ## g .long 2 ## Num DIEs .long 42 .long 90 .long 0 LNames1: .long 46 ## h .long 1 ## Num DIEs .long 69 .long 0 .section __DWARF,__apple_objc,regular,debug Lobjc_begin: .long 1212240712 ## Header Magic .short 1 ## Header Version .short 0 ## Header Hash Function .long 1 ## Header Bucket Count .long 0 ## Header Hash Count .long 12 ## Header Data Length .long 0 ## HeaderData Die Offset Base .long 1 ## HeaderData Atom Count .short 1 ## DW_ATOM_die_offset .short 6 ## DW_FORM_data4 .long -1 ## Bucket 0 .section __DWARF,__apple_namespac,regular,debug Lnamespac_begin: .long 1212240712 ## Header Magic .short 1 ## Header Version .short 0 ## Header Hash Function .long 1 ## Header Bucket Count .long 0 ## Header Hash Count .long 12 ## Header Data Length .long 0 ## HeaderData Die Offset Base .long 1 ## HeaderData Atom Count .short 1 ## DW_ATOM_die_offset .short 6 ## DW_FORM_data4 .long -1 ## Bucket 0 .section __DWARF,__apple_types,regular,debug Ltypes_begin: .long 1212240712 ## Header Magic .short 1 ## Header Version .short 0 ## Header Hash Function .long 1 ## Header Bucket Count .long 0 ## Header Hash Count .long 20 ## Header Data Length .long 0 ## HeaderData Die Offset Base .long 3 ## HeaderData Atom Count .short 1 ## DW_ATOM_die_offset .short 6 ## DW_FORM_data4 .short 3 ## DW_ATOM_die_tag .short 5 ## DW_FORM_data2 .short 4 ## DW_ATOM_type_flags .short 11 ## DW_FORM_data1 .long -1 ## Bucket 0 .subsections_via_symbols .section __DWARF,__debug_line,regular,debug Lsection_line: Lline_table_start0: