a2824632cb
We currently cannot represent abbreviation codes with more than 16 bits, and we were lldb-asserting if we ever ran into one. While I haven't seen any real DWARF with these kinds of abbreviations, it is possible to hit this with handcrafted evil dwarf, due some sort of corruptions, or just bugs (the addition of PeekDIEName makes these bugs more likely, as the function blindly dereferences offsets within the debug info section) . Missing abbreviations were already reporting an error. This patch turns sure that large abbreviations into an error as well, and adds a test for both cases.
48 lines
2.3 KiB
ArmAsm
48 lines
2.3 KiB
ArmAsm
# REQUIRES: x86
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# RUN: llvm-mc -triple=x86_64-pc-linux -filetype=obj %s > %t
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# RUN: %lldb %t \
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# RUN: -o exit 2>&1 | FileCheck %s
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# CHECK-DAG: error: {{.*}} [0x0000000000000022]: abbreviation code 65536 too big, please file a bug and attach the file at the start of this error message
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# CHECK-DAG: error: {{.*}} [0x0000000000000048]: invalid abbreviation code 47, please file a bug and attach the file at the start of this error message
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.section .debug_abbrev,"",@progbits
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.uleb128 65535 # Largest representable 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 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 .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
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.Ldebug_info_start0:
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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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.uleb128 65535 # DW_TAG_compile_unit
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.asciz "Hand-written DWARF" # DW_AT_producer
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.uleb128 65536 # Unrepresentable abbreviation
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.byte 0 # End Of Children Mark
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.Ldebug_info_end0:
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.section .debug_info,"",@progbits
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.Lcu_begin1:
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.long .Ldebug_info_end1-.Ldebug_info_start1 # Length of Unit
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.Ldebug_info_start1:
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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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.uleb128 65535 # DW_TAG_compile_unit
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.asciz "Hand-written DWARF" # DW_AT_producer
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.byte 47 # Missing abbreviation
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.byte 0 # End Of Children Mark
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.Ldebug_info_end1:
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