54ca2d688a
Summary: The positions of the DwarfVersion and AddressSize arguments were reversed, which caused parsing for dwarf opcodes which contained address-size-dependent operands (such as DW_OP_addr). Amusingly enough, none of the address-size asserts fired, as dwarf version was always 4, which is a valid address size. I ran into this when constructing weird inputs for the DWARF verifier. I I add a test case as hand-written dwarf -- I am not sure how to trigger this differently, as having a DW_OP_addr inside a location list is a fairly non-standard thing to do. Fixing this error exposed a bug in the debug_loc.dwo parser, which was always being constructed with an address size of 0. I fix that as well by following the pattern in the non-dwo parser of picking up the address size from the first compile unit (which is technically not correct, but probably good enough in practice). Reviewers: JDevlieghere, aprantl, dblaikie Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D45324 llvm-svn: 329381
59 lines
2.0 KiB
ArmAsm
59 lines
2.0 KiB
ArmAsm
# RUN: llvm-mc -triple x86_64-pc-linux %s -filetype=obj | llvm-dwarfdump - | FileCheck %s
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#
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# CHECK: DW_TAG_variable
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# CHECK-NEXT: DW_AT_name ("a")
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# CHECK-NEXT: DW_AT_location
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# CHECK-NEXT: [0x0000000000000000, 0x0000000000000001): DW_OP_addr 0xdeadbeefbaadf00d
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.section .debug_str,"MS",@progbits,1
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.Linfo_producer:
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.asciz "hand-written DWARF"
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.Lname_a:
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.asciz "a"
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.section .debug_loc,"",@progbits
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.Ldebug_loc0:
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.quad 0
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.quad 1
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.short .Lloc0_end-.Lloc0_start # Loc expr size
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.Lloc0_start:
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.byte 3 # DW_OP_addr
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.quad 0xdeadbeefbaadf00d
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.Lloc0_end:
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.quad 0
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.quad 0
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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 14 # DW_FORM_strp
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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 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 14 # DW_FORM_strp
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.byte 2 # DW_AT_location
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.byte 23 # DW_FORM_sec_offset
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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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 .Lcu_end0-.Lcu_start0 # Length of Unit
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.Lcu_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 [1] DW_TAG_compile_unit
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.long .Linfo_producer # DW_AT_producer
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.byte 5 # Abbrev [5] DW_TAG_variable
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.long .Lname_a # DW_AT_name
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.long .Ldebug_loc0 # DW_AT_location
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.byte 0 # End Of Children Mark
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.Lcu_end0:
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