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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 ug" -b | FileCheck %s
# CHECK: (lldb) target variable ug
# CHECK: (U) ug = {
# CHECK: raw = 1688469761
# CHECK: = (a = 1, b = 1, c = 36, d = 2, e = 36, f = 1)
# CHECK: }
# We are testing how ValueObject deals with bit-fields when an argument is
# passed by register. Compiling at -O1 allows us to capture this case and
# test it.
#
# typedef union {
# unsigned raw;
# struct {
# unsigned a : 8;
# unsigned b : 8;
# unsigned c : 6;
# unsigned d : 2;
# unsigned e : 6;
# unsigned f : 2;
# };
# } U;
#
# // This appears first in the debug info and pulls the type definition in...
# static U __attribute__((used)) _type_anchor;
# // ... then our useful variable appears last in the debug info and we can
# // tweak the assembly without needing to edit a lot of offsets by hand.
# static U ug;
#
# extern void f(U);
#
# // Omit debug info for main.
# __attribute__((nodebug))
# int main() {
# ug.raw = 0x64A40101;
# f(ug);
# f((U)ug.raw);
# }
#
# Compiled as follows:
#
# clang -O1 -gdwarf-4 weird.c -S -o weird.s
#
# Then the DWARF was hand modified to get DW_AT_LOCATION for ug from:
#
# DW_AT_location (DW_OP_addr 0x3f8, DW_OP_deref, DW_OP_constu 0x64a40101, DW_OP_mul, DW_OP_lit0, DW_OP_plus, DW_OP_stack_value)
#
# to this:
#
# DW_AT_location (DW_OP_constu 0x64a40101, DW_OP_stack_value)
#
# to work-around a seperate bug.
.zerofill __DATA,__bss,__type_anchor,4,2 ## @_type_anchor
.zerofill __DATA,__bss,_ug.0,1,2 ## @ug.0
.no_dead_strip __type_anchor
.section __DWARF,__debug_str,regular,debug
Linfo_string:
.zero 138
.asciz "_type_anchor" ## string offset=138
.asciz "U" ## string offset=151
.asciz "raw" ## string offset=153
.asciz "unsigned int" ## string offset=157
.asciz "a" ## string offset=170
.asciz "b" ## string offset=172
.asciz "c" ## string offset=174
.asciz "d" ## string offset=176
.asciz "e" ## string offset=178
.asciz "f" ## string offset=180
.asciz "ug" ## string offset=182
.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
.ascii "\202|" ## DW_AT_LLVM_sysroot
.byte 14 ## DW_FORM_strp
.ascii "\357\177" ## DW_AT_APPLE_sdk
.byte 14 ## DW_FORM_strp
.byte 16 ## DW_AT_stmt_list
.byte 23 ## DW_FORM_sec_offset
.byte 27 ## DW_AT_comp_dir
.byte 14 ## DW_FORM_strp
.ascii "\341\177" ## DW_AT_APPLE_optimized
.byte 25 ## DW_FORM_flag_present
.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 2 ## DW_AT_location
.byte 24 ## DW_FORM_exprloc
.byte 0 ## EOM(1)
.byte 0 ## EOM(2)
.byte 3 ## 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 4 ## 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 5 ## 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 6 ## 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 7 ## 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 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 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 9 ## 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 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:0xd0 DW_TAG_compile_unit
.long 0 ## DW_AT_producer
.short 12 ## DW_AT_language
.long 47 ## DW_AT_name
.long 60 ## DW_AT_LLVM_sysroot
.long 117 ## DW_AT_APPLE_sdk
.long 0 ## DW_AT_stmt_list
.long 133 ## DW_AT_comp_dir
## DW_AT_APPLE_optimized
.byte 2 ## Abbrev [2] 0x26:0x15 DW_TAG_variable
.long 138 ## DW_AT_name
.long 59 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 14 ## DW_AT_decl_line
.byte 9 ## DW_AT_location
.byte 3
.quad __type_anchor
.byte 3 ## Abbrev [3] 0x3b:0xb DW_TAG_typedef
.long 70 ## DW_AT_type
.long 151 ## DW_AT_name
.byte 1 ## DW_AT_decl_file
.byte 11 ## DW_AT_decl_line
.byte 4 ## Abbrev [4] 0x46:0x6c DW_TAG_union_type
.byte 4 ## DW_AT_byte_size
.byte 1 ## DW_AT_decl_file
.byte 1 ## DW_AT_decl_line
.byte 5 ## Abbrev [5] 0x4a:0xc DW_TAG_member
.long 153 ## DW_AT_name
.long 178 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 2 ## DW_AT_decl_line
.byte 0 ## DW_AT_data_member_location
.byte 6 ## Abbrev [6] 0x56:0x8 DW_TAG_member
.long 94 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 3 ## DW_AT_decl_line
.byte 0 ## DW_AT_data_member_location
.byte 7 ## Abbrev [7] 0x5e:0x53 DW_TAG_structure_type
.byte 4 ## DW_AT_byte_size
.byte 1 ## DW_AT_decl_file
.byte 3 ## DW_AT_decl_line
.byte 8 ## Abbrev [8] 0x62:0xd DW_TAG_member
.long 170 ## DW_AT_name
.long 178 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 4 ## DW_AT_decl_line
.byte 8 ## DW_AT_bit_size
.byte 0 ## DW_AT_data_bit_offset
.byte 8 ## Abbrev [8] 0x6f:0xd DW_TAG_member
.long 172 ## DW_AT_name
.long 178 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 5 ## DW_AT_decl_line
.byte 8 ## DW_AT_bit_size
.byte 8 ## DW_AT_data_bit_offset
.byte 8 ## Abbrev [8] 0x7c:0xd DW_TAG_member
.long 174 ## DW_AT_name
.long 178 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 6 ## DW_AT_decl_line
.byte 6 ## DW_AT_bit_size
.byte 16 ## DW_AT_data_bit_offset
.byte 8 ## Abbrev [8] 0x89:0xd DW_TAG_member
.long 176 ## DW_AT_name
.long 178 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 7 ## DW_AT_decl_line
.byte 2 ## DW_AT_bit_size
.byte 22 ## DW_AT_data_bit_offset
.byte 8 ## Abbrev [8] 0x96:0xd DW_TAG_member
.long 178 ## DW_AT_name
.long 178 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 8 ## DW_AT_decl_line
.byte 6 ## DW_AT_bit_size
.byte 24 ## DW_AT_data_bit_offset
.byte 8 ## Abbrev [8] 0xa3:0xd DW_TAG_member
.long 180 ## DW_AT_name
.long 178 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 9 ## 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 9 ## Abbrev [9] 0xb2:0x7 DW_TAG_base_type
.long 157 ## DW_AT_name
.byte 7 ## DW_AT_encoding
.byte 4 ## DW_AT_byte_size
.byte 2 ## Abbrev [2] 0xb9:0x21 DW_TAG_variable
.long 182 ## DW_AT_name
.long 59 ## DW_AT_type
.byte 1 ## DW_AT_decl_file
.byte 17 ## DW_AT_decl_line
.byte 7 ## DW_AT_location
.byte 16
.ascii "\201\202\220\245\006"
.byte 159
.byte 0 ## End Of Children Mark
Ldebug_info_end0:
|
