300 lines
15 KiB
ArmAsm
300 lines
15 KiB
ArmAsm
# Test handling of forward-declared (DW_AT_declaration) structures. These types
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# can be produced due to vtable-based type homing, or other -flimit-debug-info
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# optimizations.
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# REQUIRES: x86
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# RUN: split-file %s %t
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# RUN: llvm-mc --triple x86_64-pc-linux %t/asm --filetype=obj -o %t.o
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# RUN: %lldb -o "settings set interpreter.stop-command-source-on-error false" \
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# RUN: -s %t/commands -o exit %t.o 2>&1 | FileCheck %s
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#--- commands
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# Type A should be treated as a forward-declaration even though it has a child.
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target var a
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# CHECK-LABEL: target var a
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# FIXME: This should also produce some kind of an error.
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# CHECK: (A) a = {}
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expr a
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# CHECK-LABEL: expr a
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# CHECK: incomplete type 'A' where a complete type is required
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# Parsing B::B1 should not crash even though B is incomplete. Note that in this
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# case B must be forcefully completed.
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target var b1
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# CHECK-LABEL: target var b1
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# CHECK: (B::B1) b1 = (ptr = 0x00000000baadf00d)
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expr b1
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# CHECK-LABEL: expr b1
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# CHECK: (B::B1) $0 = (ptr = 0x00000000baadf00d)
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target var c1
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# CHECK-LABEL: target var c1
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# CHECK: (C::C1) c1 = 424742
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expr c1
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# CHECK-LABEL: expr c1
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# CHECK: (C::C1) $1 = 424742
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#--- asm
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.text
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_ZN1AC2Ev:
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retq
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.LZN1AC2Ev_end:
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.data
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.p2align 4
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a:
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.quad _ZTV1A+16
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.quad 0xdeadbeef
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b1:
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.quad 0xbaadf00d
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c1:
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.long 42474247
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.section .debug_abbrev,"",@progbits
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.byte 1 # Abbreviation Code
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.byte 17 # DW_TAG_compile_unit
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.byte 1 # DW_CHILDREN_yes
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.byte 37 # DW_AT_producer
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.byte 8 # DW_FORM_string
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 2 # Abbreviation Code
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.byte 52 # DW_TAG_variable
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.byte 0 # DW_CHILDREN_no
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.byte 3 # DW_AT_name
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.byte 8 # DW_FORM_string
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 2 # DW_AT_location
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.byte 24 # DW_FORM_exprloc
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 3 # Abbreviation Code
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.byte 19 # DW_TAG_structure_type
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.byte 1 # DW_CHILDREN_yes
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.byte 3 # DW_AT_name
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.byte 8 # DW_FORM_string
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.byte 60 # DW_AT_declaration
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.byte 25 # DW_FORM_flag_present
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 4 # Abbreviation Code
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.byte 46 # DW_TAG_subprogram
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.byte 1 # DW_CHILDREN_yes
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.byte 3 # DW_AT_name
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.byte 8 # DW_FORM_string
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.byte 60 # DW_AT_declaration
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.byte 25 # DW_FORM_flag_present
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 5 # Abbreviation Code
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.byte 5 # DW_TAG_formal_parameter
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.byte 0 # DW_CHILDREN_no
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 52 # DW_AT_artificial
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.byte 25 # DW_FORM_flag_present
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 6 # Abbreviation Code
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.byte 2 # DW_TAG_class_type
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.byte 1 # DW_CHILDREN_yes
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.byte 3 # DW_AT_name
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.byte 8 # DW_FORM_string
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 7 # Abbreviation Code
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.byte 13 # DW_TAG_member
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.byte 0 # DW_CHILDREN_no
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.byte 3 # DW_AT_name
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.byte 8 # DW_FORM_string
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 56 # DW_AT_data_member_location
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.byte 11 # DW_FORM_data1
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 8 # Abbreviation Code
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.byte 15 # DW_TAG_pointer_type
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.byte 0 # DW_CHILDREN_no
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 9 # Abbreviation Code
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.byte 36 # DW_TAG_base_type
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.byte 0 # DW_CHILDREN_no
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.byte 3 # DW_AT_name
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.byte 8 # DW_FORM_string
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.byte 62 # DW_AT_encoding
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.byte 11 # DW_FORM_data1
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.byte 11 # DW_AT_byte_size
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.byte 11 # DW_FORM_data1
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 10 # Abbreviation Code
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.byte 46 # DW_TAG_subprogram
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.byte 1 # DW_CHILDREN_yes
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 64 # DW_AT_frame_base
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.byte 24 # DW_FORM_exprloc
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.byte 100 # DW_AT_object_pointer
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.byte 19 # DW_FORM_ref4
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.byte 71 # DW_AT_specification
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.byte 19 # DW_FORM_ref4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 11 # Abbreviation Code
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.byte 5 # DW_TAG_formal_parameter
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.byte 0 # DW_CHILDREN_no
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.byte 2 # DW_AT_location
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.byte 24 # DW_FORM_exprloc
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.byte 3 # DW_AT_name
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.byte 8 # DW_FORM_string
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 52 # DW_AT_artificial
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.byte 25 # DW_FORM_flag_present
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 12 # Abbreviation Code
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.byte 22 # DW_TAG_typedef
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.byte 0 # DW_CHILDREN_no
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 3 # DW_AT_name
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.byte 8 # DW_FORM_string
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 0 # EOM(3)
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.section .debug_info,"",@progbits
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.Lcu_begin0:
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.long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
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.Ldebug_info_start0:
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.short 4 # DWARF version number
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 8 # Address Size (in bytes)
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.byte 1 # Abbrev [1] DW_TAG_compile_unit
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.asciz "Hand-written DWARF" # DW_AT_producer
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.quad _ZN1AC2Ev # DW_AT_low_pc
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.long .LZN1AC2Ev_end-_ZN1AC2Ev # DW_AT_high_pc
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# Case 1: The compiler has omitted the declaration of the type, but it still
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# produces an entry for its implicit constructor instantiated in this compile
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# unit.
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# Roughly corresponds to this:
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# struct A {
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# virtual ~A(); // not defined here
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# // implicit A() {}
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# } a;
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.byte 2 # Abbrev [2] DW_TAG_variable
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.asciz "a" # DW_AT_name
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.long .LA-.Lcu_begin0 # DW_AT_type
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.byte 9 # DW_AT_location
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.byte 3
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.quad a
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.LA:
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.byte 3 # Abbrev [3] DW_TAG_structure_type
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.asciz "A" # DW_AT_name
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# DW_AT_declaration
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.LA_A:
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.byte 4 # Abbrev [4] DW_TAG_subprogram
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.asciz "A" # DW_AT_name
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# DW_AT_declaration
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.byte 5 # Abbrev [5] DW_TAG_formal_parameter
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.long .LAptr-.Lcu_begin0 # DW_AT_type
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# DW_AT_artificial
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.byte 0 # End Of Children Mark
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.byte 0 # End Of Children Mark
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.LAptr:
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.byte 8 # Abbrev [8] DW_TAG_pointer_type
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.long .LA-.Lcu_begin0 # DW_AT_type
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.byte 10 # Abbrev [10] DW_TAG_subprogram
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.quad _ZN1AC2Ev # DW_AT_low_pc
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.long .LZN1AC2Ev_end-_ZN1AC2Ev # DW_AT_high_pc
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.byte 1 # DW_AT_frame_base
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.byte 86
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.long .Lthis-.Lcu_begin0 # DW_AT_object_pointer
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.long .LA_A-.Lcu_begin0 # DW_AT_specification
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.Lthis:
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.byte 11 # Abbrev [11] DW_TAG_formal_parameter
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.byte 2 # DW_AT_location
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.byte 145
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.byte 120
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.asciz "this" # DW_AT_name
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.long .LAptr-.Lcu_begin0 # DW_AT_type
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# DW_AT_artificial
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.byte 0 # End Of Children Mark
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# Case 2: A structure has been emitted as a declaration only, but it contains a
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# nested class, which has a full definition present.
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# Rougly corresponds to this:
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# struct B {
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# virtual ~B(); // not defined here
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# class B1 {
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# A* ptr;
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# };
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# };
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# B::B1 b1;
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# Note that it is important that the inner type is a class (not struct) as that
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# triggers a clang assertion.
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.byte 3 # Abbrev [3] DW_TAG_structure_type
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.asciz "B" # DW_AT_name
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# DW_AT_declaration
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.LB1:
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.byte 6 # Abbrev [6] DW_TAG_class_type
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.asciz "B1" # DW_AT_name
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.byte 7 # Abbrev [5] 0x58:0xc DW_TAG_member
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.asciz "ptr" # DW_AT_name
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.long .LAptr # DW_AT_type
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.byte 0 # DW_AT_data_member_location
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.byte 0 # End Of Children Mark
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.byte 0 # End Of Children Mark
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.byte 2 # Abbrev [2] DW_TAG_variable
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.asciz "b1" # DW_AT_name
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.long .LB1-.Lcu_begin0 # DW_AT_type
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.byte 9 # DW_AT_location
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.byte 3
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.quad b1
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# Case 3: A typedef in DW_AT_declaration struct.
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# C++ equivalent:
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# struct C {
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# virtual ~C(); // not defined here
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# typedef int C1;
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# };
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# C::C1 c1;
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.Lint:
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.byte 9 # Abbrev [9] DW_TAG_base_type
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.asciz "int" # DW_AT_name
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.byte 5 # DW_AT_encoding
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.byte 4 # DW_AT_byte_size
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.byte 3 # Abbrev [3] DW_TAG_structure_type
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.asciz "C" # DW_AT_name
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# DW_AT_declaration
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.LC1:
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.byte 12 # Abbrev [12] DW_TAG_typedef
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.long .Lint-.Lcu_begin0 # DW_AT_type
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.asciz "C1" # DW_AT_name
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.byte 0 # End Of Children Mark
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.byte 2 # Abbrev [2] DW_TAG_variable
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.asciz "c1" # DW_AT_name
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.long .LC1-.Lcu_begin0 # DW_AT_type
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.byte 9 # DW_AT_location
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.byte 3
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.quad c1
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.byte 0 # End Of Children Mark
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.Ldebug_info_end0:
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