0de1463373
The function was returning an incorrect (empty) value on the first invocation. Given that this only affected the first invocation, this bug/typo went mostly unaffected. DW_AT_const_value were particularly badly affected by this as the GetByteSize call is SymbolFileDWARF::ParseVariableDIE is likely to be the first call of this function, and its effects cannot be undone by retrying. Depends on D86348. Differential Revision: https://reviews.llvm.org/D86436
176 lines
8.3 KiB
ArmAsm
176 lines
8.3 KiB
ArmAsm
# Test handling of (optimized-out/location-less) variables whose value is
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# specified by DW_AT_const_value
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# REQUIRES: x86
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# RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux %s -o %t
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# RUN: %lldb %t \
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# RUN: -o "target variable udata data1 data2 data4 data8 string strp ref4 udata_ptr" \
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# RUN: -o exit | FileCheck %s
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# CHECK-LABEL: target variable
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## Variable specified via DW_FORM_udata. This is typical for clang (10).
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# CHECK: (unsigned long) udata = 4742474247424742
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## Variables specified via fixed-size forms. This is typical for gcc (9).
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# CHECK: (unsigned long) data1 = 47
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# CHECK: (unsigned long) data2 = 4742
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# CHECK: (unsigned long) data4 = 47424742
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# CHECK: (unsigned long) data8 = 4742474247424742
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## Variables specified using string forms. This behavior purely speculative -- I
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## don't know of any compiler that would represent character strings this way.
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# CHECK: (char [7]) string = "string"
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# CHECK: (char [7]) strp = "strp"
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## Bogus attribute form. Let's make sure we don't crash at least.
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# CHECK: (char [7]) ref4 = <empty constant data>
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## A variable of pointer type.
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# CHECK: (unsigned long *) udata_ptr = 0xdeadbeefbaadf00d
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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 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 2 # 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 4 # Abbreviation Code
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.byte 1 # DW_TAG_array_type
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.byte 1 # DW_CHILDREN_yes
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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 5 # Abbreviation Code
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.byte 33 # DW_TAG_subrange_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 55 # DW_AT_count
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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 6 # 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 11 # DW_AT_byte_size
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.byte 11 # DW_FORM_data1
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.byte 62 # DW_AT_encoding
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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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.macro var code, form
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.byte \code # 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 28 # DW_AT_const_value
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.byte \form
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.endm
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var 10, 0xf # DW_FORM_udata
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var 11, 0xb # DW_FORM_data1
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var 12, 0x5 # DW_FORM_data2
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var 13, 0x6 # DW_FORM_data4
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var 14, 0x7 # DW_FORM_data8
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var 15, 0x8 # DW_FORM_string
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var 16, 0xe # DW_FORM_strp
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var 17, 0x13 # DW_FORM_ref4
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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 DW_TAG_compile_unit
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.asciz "Hand-written DWARF" # DW_AT_producer
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.asciz "const.c" # DW_AT_name
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.Lchar_arr:
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.byte 4 # Abbrev DW_TAG_array_type
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.long .Lchar-.Lcu_begin0 # DW_AT_type
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.byte 5 # Abbrev DW_TAG_subrange_type
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.long .Lulong-.Lcu_begin0 # DW_AT_type
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.byte 7 # DW_AT_count
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.byte 0 # End Of Children Mark
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.Lchar:
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.byte 6 # Abbrev DW_TAG_base_type
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.asciz "char" # DW_AT_name
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.byte 1 # DW_AT_byte_size
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.byte 6 # DW_AT_encoding
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.Lulong:
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.byte 6 # Abbrev DW_TAG_base_type
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.asciz "unsigned long" # DW_AT_name
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.byte 8 # DW_AT_byte_size
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.byte 7 # DW_AT_encoding
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.Lulong_ptr:
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.byte 2 # Abbrev DW_TAG_pointer_type
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.long .Lulong-.Lcu_begin0 # DW_AT_type
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.byte 10 # Abbrev DW_TAG_variable
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.asciz "udata" # DW_AT_name
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.long .Lulong-.Lcu_begin0 # DW_AT_type
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.uleb128 4742474247424742 # DW_AT_const_value
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.byte 11 # Abbrev DW_TAG_variable
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.asciz "data1" # DW_AT_name
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.long .Lulong-.Lcu_begin0 # DW_AT_type
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.byte 47 # DW_AT_const_value
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.byte 12 # Abbrev DW_TAG_variable
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.asciz "data2" # DW_AT_name
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.long .Lulong-.Lcu_begin0 # DW_AT_type
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.word 4742 # DW_AT_const_value
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.byte 13 # Abbrev DW_TAG_variable
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.asciz "data4" # DW_AT_name
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.long .Lulong-.Lcu_begin0 # DW_AT_type
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.long 47424742 # DW_AT_const_value
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.byte 14 # Abbrev DW_TAG_variable
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.asciz "data8" # DW_AT_name
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.long .Lulong-.Lcu_begin0 # DW_AT_type
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.quad 4742474247424742 # DW_AT_const_value
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.byte 15 # Abbrev DW_TAG_variable
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.asciz "string" # DW_AT_name
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.long .Lchar_arr-.Lcu_begin0 # DW_AT_type
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.asciz "string" # DW_AT_const_value
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.byte 16 # Abbrev DW_TAG_variable
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.asciz "strp" # DW_AT_name
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.long .Lchar_arr-.Lcu_begin0 # DW_AT_type
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.long .Lstrp # DW_AT_const_value
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.byte 17 # Abbrev DW_TAG_variable
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.asciz "ref4" # DW_AT_name
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.long .Lchar_arr-.Lcu_begin0 # DW_AT_type
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.long .Lulong-.Lcu_begin0 # DW_AT_const_value
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.byte 10 # Abbrev DW_TAG_variable
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.asciz "udata_ptr" # DW_AT_name
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.long .Lulong_ptr-.Lcu_begin0 # DW_AT_type
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.uleb128 0xdeadbeefbaadf00d # DW_AT_const_value
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.byte 0 # End Of Children Mark
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.Ldebug_info_end0:
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.section .debug_str,"MS",@progbits,1
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.Lstrp:
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.asciz "strp"
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