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980f06a21f
This isn't the most robust error handling API, but does allow clients to opt-in to getting Errors they can handle. I suspect the long-term solution would be to move away from the lazy unit parsing and have an explicit step that parses the unit and then allows access to the other APIs that require a parsed unit. llvm-dwarfdump could be expanded to use this (or newer/better API) to demonstrate the benefit of it - but for now lld will use this in a follow-up cl which ensures lld can exit non-zero on errors like this (& provide more descriptive diagnostics including which object file the error came from). (error access to later errors when parsing nested DIEs would be good too - but, again, exposing that without it being a hassle for every consumer may be tricky) llvm-svn: 368377
155 lines
6.3 KiB
ArmAsm
155 lines
6.3 KiB
ArmAsm
# RUN: llvm-mc -triple x86_64-unknown-linux %s -filetype=obj -o %t.o
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# RUN: llvm-dwarfdump -v %t.o 2>&1 | FileCheck %s
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#
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# Test object to verify that llvm-dwarfdump handles an invalid string offsets
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# table.
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#
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# A rudimentary abbrev section.
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.section .debug_abbrev,"",@progbits
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.byte 0x01 # Abbrev code
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.byte 0x11 # DW_TAG_compile_unit
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.byte 0x00 # DW_CHILDREN_no
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.byte 0x72 # DW_AT_str_offsets_base
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.byte 0x17 # DW_FORM_sec_offset
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.byte 0x00 # EOM(1)
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.byte 0x00 # EOM(2)
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.byte 0x00 # EOM(3)
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# A rudimentary compile unit to convince dwarfdump that we are dealing with a
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# DWARF v5 string offsets table.
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.section .debug_info,"",@progbits
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# DWARF v5 32 bit CU header.
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.long CU1_end-CU1_begin # Length of Unit
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CU1_begin:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbreviation code: DW_TAG_compile_unit
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.long 0 # DW_AT_str_offsets_base
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CU1_end:
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# DWARF v5 64 bit CU header.
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.long 0xffffffff
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.quad CU2_end-CU2_begin # Length of Unit
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CU2_begin:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.quad .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbreviation code: DW_TAG_compile_unit
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.quad 0 # DW_AT_str_offsets_base
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CU2_end:
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.long CU3_end-CU3_begin # Length of Unit
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CU3_begin:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbreviation code: DW_TAG_compile_unit
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.quad .str_off0 # DW_AT_str_offsets_base
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CU3_end:
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.long CU4_end-CU4_begin # Length of Unit
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CU4_begin:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbreviation code: DW_TAG_compile_unit
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.quad .str_off1 # DW_AT_str_offsets_base
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CU4_end:
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.long CU5_end-CU5_begin # Length of Unit
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CU5_begin:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbreviation code: DW_TAG_compile_unit
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.long .str_off2_begin # DW_AT_str_offsets_base
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CU5_end:
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.long CU6_end-CU6_begin # Length of Unit
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CU6_begin:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbreviation code: DW_TAG_compile_unit
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.long .str_off3_begin # DW_AT_str_offsets_base
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CU6_end:
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.long 0xffffffff
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.quad CU7_end-CU7_begin # Length of Unit
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CU7_begin:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.quad .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbreviation code: DW_TAG_compile_unit
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.quad .str_off4_begin # DW_AT_str_offsets_base
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CU7_end:
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.long CU8_end-CU8_begin # Length of Unit
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CU8_begin:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbreviation code: DW_TAG_compile_unit
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.long .str_off_end+16 # DW_AT_str_offsets_base
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CU8_end:
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.long 0xffffffff
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.quad CU9_end-CU9_begin # Length of Unit
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CU9_begin:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.quad .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbreviation code: DW_TAG_compile_unit
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.quad .str_off_end+8 # DW_AT_str_offsets_base
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CU9_end:
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.section .debug_str_offsets,"",@progbits
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# Invalid length
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.long 0xfffffff4
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.short 5 # DWARF version
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.short 0 # Padding
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.str_off0:
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.long 0
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# Length beyond section bounds
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.long .str_off_end-.str_off1+8
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.short 5 # DWARF version
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.short 0 # Padding
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.str_off1:
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.long 0
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# Length intrudes on following unit
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.long .str_off2_end-.str_off2_begin+8
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.short 5 # DWARF version
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.short 0 # Padding
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.str_off2_begin:
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.long 0
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.str_off2_end:
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# Plain contribution, no errors here
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.long .str_off3_end-.str_off3_begin
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.short 5 # DWARF version
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.short 0 # Padding
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.str_off3_begin:
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.long 0
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.str_off3_end:
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# 32 bit contribution referenced from a 64 bit unit
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.long .str_off4_end-.str_off4_begin
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.short 5 # DWARF version
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.short 0 # Padding
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.str_off4_begin:
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.long 0
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.str_off4_end:
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.str_off_end:
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# CHECK: error: invalid reference to or invalid content in .debug_str_offsets[.dwo]: insufficient space for 32 bit header prefix
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# CHECK: error: invalid reference to or invalid content in .debug_str_offsets[.dwo]: insufficient space for 64 bit header prefix
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# CHECK: error: invalid reference to or invalid content in .debug_str_offsets[.dwo]: invalid length
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# CHECK: error: invalid reference to or invalid content in .debug_str_offsets[.dwo]: length exceeds section size
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# CHECK: error: invalid reference to or invalid content in .debug_str_offsets[.dwo]: 32 bit contribution referenced from a 64 bit unit
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# CHECK: error: invalid reference to or invalid content in .debug_str_offsets[.dwo]: section offset exceeds section size
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# CHECK: error: invalid reference to or invalid content in .debug_str_offsets[.dwo]: section offset exceeds section size
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# CHECK: error: overlapping contributions to string offsets table in section .debug_str_offsets.
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