9109311356
This is very similar to D85968, only more elusive to since we were not adding the typedef type to the relevant DeclContext until D86140, which meant that the DeclContext was populated (and the relevant assertion hit) only after importing the type into the expression ast in a particular way. I haven't checked whether this situation can be hit in the gmodules case, but my money is on "yes". Differential Revision: https://reviews.llvm.org/D86216
298 lines
15 KiB
ArmAsm
298 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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.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 147 # DW_AT_object_pointer
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.long 68 # DW_AT_specification
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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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