| # 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: |
