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# RUN: llvm-mc -filetype=obj -o %t -triple x86_64-apple-macosx10.15.0 %s
# RUN: %lldb %t -o "target variable constant" -b | FileCheck %s
# CHECK: (lldb) target variable constant
# CHECK: (U) constant = {
# CHECK: raw = 1688469761
# CHECK: = (a = 1, b = 1, c = 36, d = 2, e = 36, f = 1)
# CHECK: }
# This is testing when how ValueObjectVariable handles the case where the
# DWARFExpression holds the data that represents a constant value.
# Compile at -O1 allows us to capture this case. Below is the code used
# to generate the assembly:
#
# typedef union
# {
# unsigned raw;
# struct
# {
# unsigned a : 8;
# unsigned b : 8;
# unsigned c : 6;
# unsigned d : 2;
# unsigned e : 6;
# unsigned f : 2;
# } ;
# } U;
#
# static U __attribute__((used)) _type_anchor;
# static const int constant = 0x64A40101;
#
# int g() { return constant; }
#
# int main() {
# U u;
# u.raw = 0x64A40101;
# }
#
# Compiled as follows:
#
# clang -gdwarf-4 -O1 dw_at_const_value_bug.c -S -o dw_at_const_value_bug.s
#
# I was able to obtain a global of type U with DW_AT_const_value but was able
# to using int. This required modifying the DW_AT_type of constant to be type
# U. After that stripping as much of the assembly as possible to give us a
# smaller reproducer.
.zerofill __DATA,__bss,__type_anchor,4,2 ## @_type_anchor
.no_dead_strip __type_anchor
.section __DWARF,__debug_str,regular,debug
Linfo_string:
.zero 90
.asciz "constant" ## string offset=90
.asciz "int" ## string offset=99
.asciz "_type_anchor" ## string offset=103
.asciz "U" ## string offset=116
.asciz "raw" ## string offset=118
.asciz "unsigned int" ## string offset=122
.asciz "a" ## string offset=135
.asciz "b" ## string offset=137
.asciz "c" ## string offset=139
.asciz "d" ## string offset=141
.asciz "e" ## string offset=143
.asciz "f" ## string offset=145
.asciz "g" ## string offset=147
.asciz "main" ## string offset=149
.asciz "u" ## string offset=154
.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 66 ## DW_AT_stmt_list
.byte 23 ## DW_FORM_sec_offset
.byte 27 ## DW_AT_comp_dir
.byte 14 ## DW_FORM_strp
.ascii "\264B" ## DW_AT_GNU_pubnames
.byte 25 ## DW_FORM_flag_present
.ascii "\341\177" ## DW_AT_APPLE_optimized
.byte 25 ## DW_FORM_flag_present
.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 14 ## DW_FORM_strp
.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 28 ## DW_AT_const_value
.byte 15 ## DW_FORM_udata
.byte 0 ## EOM(1)
.byte 0 ## EOM(2)
.byte 3 ## 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 4 ## Abbreviation Code
.byte 36 ## DW_TAG_base_type
.byte 0 ## DW_CHILDREN_no
.byte 3 ## DW_AT_name
.byte 14 ## DW_FORM_strp
.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 5 ## Abbreviation Code
.byte 52 ## DW_TAG_variable
.byte 0 ## DW_CHILDREN_no
.byte 3 ## DW_AT_name
.byte 14 ## DW_FORM_strp
.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 6 ## 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 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 0 ## EOM(1)
.byte 0 ## EOM(2)
.byte 7 ## Abbreviation Code
.byte 23 ## DW_TAG_union_type
.byte 1 ## DW_CHILDREN_yes
.byte 11 ## DW_AT_byte_size
.byte 11 ## DW_FORM_data1
.byte 58 ## DW_AT_decl_file
.byte 11 ## DW_FORM_data1
.byte 59 ## DW_AT_decl_line
.byte 11 ## DW_FORM_data1
.byte 0 ## EOM(1)
.byte 0 ## EOM(2)
.byte 8 ## Abbreviation Code
.byte 13 ## DW_TAG_member
.byte 0 ## DW_CHILDREN_no
.byte 3 ## DW_AT_name
.byte 14 ## DW_FORM_strp
.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 56 ## DW_AT_data_member_location
.byte 11 ## DW_FORM_data1
.byte 0 ## EOM(1)
.byte 0 ## EOM(2)
.byte 9 ## Abbreviation Code
.byte 13 ## DW_TAG_member
.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 56 ## DW_AT_data_member_location
.byte 11 ## DW_FORM_data1
.byte 0 ## EOM(1)
.byte 0 ## EOM(2)
.byte 10 ## Abbreviation Code
.byte 19 ## DW_TAG_structure_type
.byte 1 ## DW_CHILDREN_yes
.byte 11 ## DW_AT_byte_size
.byte 11 ## DW_FORM_data1
.byte 58 ## DW_AT_decl_file
.byte 11 ## DW_FORM_data1
.byte 59 ## DW_AT_decl_line
.byte 11 ## DW_FORM_data1
.byte 0 ## EOM(1)
.byte 0 ## EOM(2)
.byte 11 ## Abbreviation Code
.byte 13 ## DW_TAG_member
.byte 0 ## DW_CHILDREN_no
.byte 3 ## DW_AT_name
.byte 14 ## DW_FORM_strp
.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 13 ## DW_AT_bit_size
.byte 11 ## DW_FORM_data1
.byte 107 ## DW_AT_data_bit_offset
.byte 11 ## DW_FORM_data1
.byte 0 ## EOM(1)
.byte 0 ## EOM(2)
.byte 12 ## 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 122 ## DW_AT_call_all_calls
.byte 25 ## DW_FORM_flag_present
.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 73 ## DW_AT_type
.byte 19 ## DW_FORM_ref4
.byte 63 ## DW_AT_external
.byte 25 ## DW_FORM_flag_present
.ascii "\341\177" ## DW_AT_APPLE_optimized
.byte 25 ## DW_FORM_flag_present
.byte 0 ## EOM(1)
.byte 0 ## EOM(2)
.byte 13 ## 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 122 ## DW_AT_call_all_calls
.byte 25 ## DW_FORM_flag_present
.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 73 ## DW_AT_type
.byte 19 ## DW_FORM_ref4
.byte 63 ## DW_AT_external
.byte 25 ## DW_FORM_flag_present
.ascii "\341\177" ## DW_AT_APPLE_optimized
.byte 25 ## DW_FORM_flag_present
.byte 0 ## EOM(1)
.byte 0 ## EOM(2)
.byte 14 ## Abbreviation Code
.byte 52 ## DW_TAG_variable
.byte 0 ## DW_CHILDREN_no
.byte 28 ## DW_AT_const_value
.byte 15 ## DW_FORM_udata
.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 73 ## DW_AT_type
.byte 19 ## DW_FORM_ref4
.byte 0 ## EOM(1)
.byte 0 ## EOM(2)
.byte 0 ## EOM(3)
.section __DWARF,__debug_info,regular,debug
Lsection_info:
Lcu_begin0:
.set Lset0, Ldebug_info_end0-Ldebug_info_start0 ## Length of Unit
.long Lset0
Ldebug_info_start0:
.short 4 ## DWARF version number
.set Lset1, Lsection_abbrev-Lsection_abbrev ## Offset Into Abbrev. Section
.long Lset1
.byte 8 ## Address Size (in bytes)
.byte 1 ## Abbrev [1] 0xb:0x112 DW_TAG_compile_unit
.long 0 ## DW_AT_producer
.short 12 ## DW_AT_language
.long 47 ## DW_AT_name
.long 0 ## DW_AT_stmt_list
.long 71 ## DW_AT_comp_dir
## DW_AT_GNU_pubnames
## DW_AT_APPLE_optimized
.quad 0 ## DW_AT_low_pc
.long 0
.byte 2 ## Abbrev [2] 0x2a:0x10 DW_TAG_variable
.long 90 ## DW_AT_name
.long 91 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 16 ## DW_AT_decl_line
.ascii "\201\202\220\245\006" ## DW_AT_const_value
.byte 3 ## Abbrev [3] 0x3a:0x5 DW_TAG_const_type
.long 63 ## DW_AT_type
.byte 4 ## Abbrev [4] 0x3f:0x7 DW_TAG_base_type
.long 99 ## DW_AT_name
.byte 5 ## DW_AT_encoding
.byte 4 ## DW_AT_byte_size
.byte 5 ## Abbrev [5] 0x46:0x15 DW_TAG_variable
.long 103 ## DW_AT_name
.long 91 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 15 ## DW_AT_decl_line
.byte 9 ## DW_AT_location
.byte 3
.quad __type_anchor
.byte 6 ## Abbrev [6] 0x5b:0xb DW_TAG_typedef
.long 102 ## DW_AT_type
.long 116 ## DW_AT_name
.byte 1 ## DW_AT_decl_file
.byte 13 ## DW_AT_decl_line
.byte 7 ## Abbrev [7] 0x66:0x6c DW_TAG_union_type
.byte 4 ## DW_AT_byte_size
.byte 1 ## DW_AT_decl_file
.byte 1 ## DW_AT_decl_line
.byte 8 ## Abbrev [8] 0x6a:0xc DW_TAG_member
.long 118 ## DW_AT_name
.long 210 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 3 ## DW_AT_decl_line
.byte 0 ## DW_AT_data_member_location
.byte 9 ## Abbrev [9] 0x76:0x8 DW_TAG_member
.long 126 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 4 ## DW_AT_decl_line
.byte 0 ## DW_AT_data_member_location
.byte 10 ## Abbrev [10] 0x7e:0x53 DW_TAG_structure_type
.byte 4 ## DW_AT_byte_size
.byte 1 ## DW_AT_decl_file
.byte 4 ## DW_AT_decl_line
.byte 11 ## Abbrev [11] 0x82:0xd DW_TAG_member
.long 135 ## DW_AT_name
.long 210 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 6 ## DW_AT_decl_line
.byte 8 ## DW_AT_bit_size
.byte 0 ## DW_AT_data_bit_offset
.byte 11 ## Abbrev [11] 0x8f:0xd DW_TAG_member
.long 137 ## DW_AT_name
.long 210 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 7 ## DW_AT_decl_line
.byte 8 ## DW_AT_bit_size
.byte 8 ## DW_AT_data_bit_offset
.byte 11 ## Abbrev [11] 0x9c:0xd DW_TAG_member
.long 139 ## DW_AT_name
.long 210 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 8 ## DW_AT_decl_line
.byte 6 ## DW_AT_bit_size
.byte 16 ## DW_AT_data_bit_offset
.byte 11 ## Abbrev [11] 0xa9:0xd DW_TAG_member
.long 141 ## DW_AT_name
.long 210 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 9 ## DW_AT_decl_line
.byte 2 ## DW_AT_bit_size
.byte 22 ## DW_AT_data_bit_offset
.byte 11 ## Abbrev [11] 0xb6:0xd DW_TAG_member
.long 143 ## DW_AT_name
.long 210 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 10 ## DW_AT_decl_line
.byte 6 ## DW_AT_bit_size
.byte 24 ## DW_AT_data_bit_offset
.byte 11 ## Abbrev [11] 0xc3:0xd DW_TAG_member
.long 145 ## DW_AT_name
.long 210 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 11 ## DW_AT_decl_line
.byte 2 ## DW_AT_bit_size
.byte 30 ## DW_AT_data_bit_offset
.byte 0 ## End Of Children Mark
.byte 0 ## End Of Children Mark
.byte 4 ## Abbrev [4] 0xd2:0x7 DW_TAG_base_type
.long 122 ## DW_AT_name
.byte 7 ## DW_AT_encoding
.byte 4 ## DW_AT_byte_size
.byte 14 ## Abbrev [14] 0x10b:0x10 DW_TAG_variable
.ascii "\201\202\220\245\006" ## DW_AT_const_value
.long 154 ## DW_AT_name
.byte 1 ## DW_AT_decl_file
.byte 21 ## DW_AT_decl_line
.long 91 ## DW_AT_type
.byte 0 ## End Of Children Mark
.byte 0 ## End Of Children Mark
Ldebug_info_end0:
|
