| # Test handling of forward-declared (DW_AT_declaration) structures. These types |
| # can be produced due to vtable-based type homing, or other -flimit-debug-info |
| # optimizations. |
| |
| # REQUIRES: x86 |
| |
| # RUN: split-file %s %t |
| # RUN: llvm-mc --triple x86_64-pc-linux %t/asm --filetype=obj -o %t.o |
| # RUN: %lldb -o "settings set interpreter.stop-command-source-on-error false" \ |
| # RUN: -s %t/commands -o exit %t.o 2>&1 | FileCheck %s |
| |
| #--- commands |
| # Type A should be treated as a forward-declaration even though it has a child. |
| target var a |
| # CHECK-LABEL: target var a |
| # FIXME: This should also produce some kind of an error. |
| # CHECK: (A) a = {} |
| expr a |
| # CHECK-LABEL: expr a |
| # CHECK: incomplete type 'A' where a complete type is required |
| |
| # Parsing B::B1 should not crash even though B is incomplete. Note that in this |
| # case B must be forcefully completed. |
| target var b1 |
| # CHECK-LABEL: target var b1 |
| # CHECK: (B::B1) b1 = (ptr = 0x00000000baadf00d) |
| expr b1 |
| # CHECK-LABEL: expr b1 |
| # CHECK: (B::B1) $0 = (ptr = 0x00000000baadf00d) |
| |
| target var c1 |
| # CHECK-LABEL: target var c1 |
| # CHECK: (C::C1) c1 = 424742 |
| |
| expr c1 |
| # CHECK-LABEL: expr c1 |
| # CHECK: (C::C1) $1 = 424742 |
| #--- asm |
| .text |
| _ZN1AC2Ev: |
| retq |
| .LZN1AC2Ev_end: |
| |
| .data |
| .p2align 4 |
| a: |
| .quad _ZTV1A+16 |
| .quad 0xdeadbeef |
| |
| b1: |
| .quad 0xbaadf00d |
| c1: |
| .long 42474247 |
| |
| .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 8 # DW_FORM_string |
| .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 52 # DW_TAG_variable |
| .byte 0 # DW_CHILDREN_no |
| .byte 3 # DW_AT_name |
| .byte 8 # DW_FORM_string |
| .byte 73 # DW_AT_type |
| .byte 19 # DW_FORM_ref4 |
| .byte 2 # DW_AT_location |
| .byte 24 # DW_FORM_exprloc |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 3 # Abbreviation Code |
| .byte 19 # DW_TAG_structure_type |
| .byte 1 # DW_CHILDREN_yes |
| .byte 3 # DW_AT_name |
| .byte 8 # DW_FORM_string |
| .byte 60 # DW_AT_declaration |
| .byte 25 # DW_FORM_flag_present |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 4 # Abbreviation Code |
| .byte 46 # DW_TAG_subprogram |
| .byte 1 # DW_CHILDREN_yes |
| .byte 3 # DW_AT_name |
| .byte 8 # DW_FORM_string |
| .byte 60 # DW_AT_declaration |
| .byte 25 # DW_FORM_flag_present |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 5 # Abbreviation Code |
| .byte 5 # DW_TAG_formal_parameter |
| .byte 0 # DW_CHILDREN_no |
| .byte 73 # DW_AT_type |
| .byte 19 # DW_FORM_ref4 |
| .byte 52 # DW_AT_artificial |
| .byte 25 # DW_FORM_flag_present |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 6 # Abbreviation Code |
| .byte 2 # DW_TAG_class_type |
| .byte 1 # DW_CHILDREN_yes |
| .byte 3 # DW_AT_name |
| .byte 8 # DW_FORM_string |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 7 # Abbreviation Code |
| .byte 13 # DW_TAG_member |
| .byte 0 # DW_CHILDREN_no |
| .byte 3 # DW_AT_name |
| .byte 8 # DW_FORM_string |
| .byte 73 # DW_AT_type |
| .byte 19 # DW_FORM_ref4 |
| .byte 56 # DW_AT_data_member_location |
| .byte 11 # DW_FORM_data1 |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 8 # 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 9 # Abbreviation Code |
| .byte 36 # DW_TAG_base_type |
| .byte 0 # DW_CHILDREN_no |
| .byte 3 # DW_AT_name |
| .byte 8 # DW_FORM_string |
| .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 10 # 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 100 # DW_AT_object_pointer |
| .byte 19 # DW_FORM_ref4 |
| .byte 71 # DW_AT_specification |
| .byte 19 # DW_FORM_ref4 |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 11 # Abbreviation Code |
| .byte 5 # DW_TAG_formal_parameter |
| .byte 0 # DW_CHILDREN_no |
| .byte 2 # DW_AT_location |
| .byte 24 # DW_FORM_exprloc |
| .byte 3 # DW_AT_name |
| .byte 8 # DW_FORM_string |
| .byte 73 # DW_AT_type |
| .byte 19 # DW_FORM_ref4 |
| .byte 52 # DW_AT_artificial |
| .byte 25 # DW_FORM_flag_present |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 12 # Abbreviation Code |
| .byte 22 # DW_TAG_typedef |
| .byte 0 # DW_CHILDREN_no |
| .byte 73 # DW_AT_type |
| .byte 19 # DW_FORM_ref4 |
| .byte 3 # DW_AT_name |
| .byte 8 # DW_FORM_string |
| .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 4 # DWARF version number |
| .long .debug_abbrev # Offset Into Abbrev. Section |
| .byte 8 # Address Size (in bytes) |
| .byte 1 # Abbrev [1] DW_TAG_compile_unit |
| .asciz "Hand-written DWARF" # DW_AT_producer |
| .quad _ZN1AC2Ev # DW_AT_low_pc |
| .long .LZN1AC2Ev_end-_ZN1AC2Ev # DW_AT_high_pc |
| |
| # Case 1: The compiler has omitted the declaration of the type, but it still |
| # produces an entry for its implicit constructor instantiated in this compile |
| # unit. |
| # Roughly corresponds to this: |
| # struct A { |
| # virtual ~A(); // not defined here |
| # // implicit A() {} |
| # } a; |
| .byte 2 # Abbrev [2] DW_TAG_variable |
| .asciz "a" # DW_AT_name |
| .long .LA-.Lcu_begin0 # DW_AT_type |
| .byte 9 # DW_AT_location |
| .byte 3 |
| .quad a |
| .LA: |
| .byte 3 # Abbrev [3] DW_TAG_structure_type |
| .asciz "A" # DW_AT_name |
| # DW_AT_declaration |
| .LA_A: |
| .byte 4 # Abbrev [4] DW_TAG_subprogram |
| .asciz "A" # DW_AT_name |
| # DW_AT_declaration |
| .byte 5 # Abbrev [5] DW_TAG_formal_parameter |
| .long .LAptr-.Lcu_begin0 # DW_AT_type |
| # DW_AT_artificial |
| .byte 0 # End Of Children Mark |
| .byte 0 # End Of Children Mark |
| .LAptr: |
| .byte 8 # Abbrev [8] DW_TAG_pointer_type |
| .long .LA-.Lcu_begin0 # DW_AT_type |
| .byte 10 # Abbrev [10] DW_TAG_subprogram |
| .quad _ZN1AC2Ev # DW_AT_low_pc |
| .long .LZN1AC2Ev_end-_ZN1AC2Ev # DW_AT_high_pc |
| .byte 1 # DW_AT_frame_base |
| .byte 86 |
| .long .Lthis-.Lcu_begin0 # DW_AT_object_pointer |
| .long .LA_A-.Lcu_begin0 # DW_AT_specification |
| .Lthis: |
| .byte 11 # Abbrev [11] DW_TAG_formal_parameter |
| .byte 2 # DW_AT_location |
| .byte 145 |
| .byte 120 |
| .asciz "this" # DW_AT_name |
| .long .LAptr-.Lcu_begin0 # DW_AT_type |
| # DW_AT_artificial |
| .byte 0 # End Of Children Mark |
| |
| # Case 2: A structure has been emitted as a declaration only, but it contains a |
| # nested class, which has a full definition present. |
| # Rougly corresponds to this: |
| # struct B { |
| # virtual ~B(); // not defined here |
| # class B1 { |
| # A* ptr; |
| # }; |
| # }; |
| # B::B1 b1; |
| # Note that it is important that the inner type is a class (not struct) as that |
| # triggers a clang assertion. |
| .byte 3 # Abbrev [3] DW_TAG_structure_type |
| .asciz "B" # DW_AT_name |
| # DW_AT_declaration |
| .LB1: |
| .byte 6 # Abbrev [6] DW_TAG_class_type |
| .asciz "B1" # DW_AT_name |
| .byte 7 # Abbrev [5] 0x58:0xc DW_TAG_member |
| .asciz "ptr" # DW_AT_name |
| .long .LAptr # DW_AT_type |
| .byte 0 # DW_AT_data_member_location |
| .byte 0 # End Of Children Mark |
| .byte 0 # End Of Children Mark |
| |
| .byte 2 # Abbrev [2] DW_TAG_variable |
| .asciz "b1" # DW_AT_name |
| .long .LB1-.Lcu_begin0 # DW_AT_type |
| .byte 9 # DW_AT_location |
| .byte 3 |
| .quad b1 |
| |
| # Case 3: A typedef in DW_AT_declaration struct. |
| # C++ equivalent: |
| # struct C { |
| # virtual ~C(); // not defined here |
| # typedef int C1; |
| # }; |
| # C::C1 c1; |
| .Lint: |
| .byte 9 # Abbrev [9] DW_TAG_base_type |
| .asciz "int" # DW_AT_name |
| .byte 5 # DW_AT_encoding |
| .byte 4 # DW_AT_byte_size |
| .byte 3 # Abbrev [3] DW_TAG_structure_type |
| .asciz "C" # DW_AT_name |
| # DW_AT_declaration |
| .LC1: |
| .byte 12 # Abbrev [12] DW_TAG_typedef |
| .long .Lint-.Lcu_begin0 # DW_AT_type |
| .asciz "C1" # DW_AT_name |
| .byte 0 # End Of Children Mark |
| |
| .byte 2 # Abbrev [2] DW_TAG_variable |
| .asciz "c1" # DW_AT_name |
| .long .LC1-.Lcu_begin0 # DW_AT_type |
| .byte 9 # DW_AT_location |
| .byte 3 |
| .quad c1 |
| |
| .byte 0 # End Of Children Mark |
| .Ldebug_info_end0: |
