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96888349a9
Summary: This adds a visitLocationList function to the DWARF v4 location lists, similar to what already exists for DWARF v5. It follows the approach outlined in previous patches (D69672), where the parsed form is always stored in the DWARF v5 format, which makes it easier for generic code to be built on top of that. v4 location lists are "upgraded" during parsing, and then this upgrade is undone while dumping. Both "inline" and section-based dumping is rewritten to reuse the existing "generic" location list dumper. This means that the output format is consistent for all location lists (the only thing one needs to implement is the function which prints the "raw" form of a location list), and that debug_loc dumping correctly processes base address selection entries, etc. The previous existing debug_loc functionality (e.g., parseOneLocationList) is rewritten on top of the new API, but it is not removed as there is still code which uses them. This will be done in follow-up patches, after I build the API to access the "interpreted" location lists in a generic way (as that is what those users really want). Reviewers: dblaikie, probinson, JDevlieghere, aprantl, SouraVX Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69847
128 lines
5.4 KiB
ArmAsm
128 lines
5.4 KiB
ArmAsm
# RUN: llvm-mc -triple=x86_64-pc-linux -filetype=obj %s > %t
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# RUN: llvm-dwarfdump %t | FileCheck %s
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# CHECK: DW_AT_name ("x0")
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# CHECK-NEXT: DW_AT_location (0x00000000
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# CHECK-NEXT: [0x0000000000000000, 0x0000000000000002): DW_OP_reg5 RDI
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# CHECK-NEXT: [0x0000000000000002, 0x0000000000000003): DW_OP_reg0 RAX)
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# CHECK: DW_AT_name ("x1")
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# CHECK-NEXT: DW_AT_location (0xdeadbeef
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# CHECK-NEXT: error: unexpected end of data)
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# CHECK: DW_AT_name ("x2")
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# CHECK-NEXT: DW_AT_location (0x00000036
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# CHECK-NEXT: error: unexpected end of data)
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.type f,@function
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f: # @f
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.Lfunc_begin0:
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movl %edi, %eax
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.Ltmp0:
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retq
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.Ltmp1:
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.Lfunc_end0:
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.size f, .Lfunc_end0-f
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.section .debug_str,"MS",@progbits,1
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.Linfo_string0:
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.asciz "Hand-written DWARF"
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.Linfo_string3:
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.asciz "f"
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.Linfo_string4:
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.asciz "int"
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.Lx0:
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.asciz "x0"
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.Lx1:
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.asciz "x1"
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.Lx2:
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.asciz "x2"
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.section .debug_loc,"",@progbits
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.Ldebug_loc0:
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.quad .Lfunc_begin0-.Lfunc_begin0
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.quad .Ltmp0-.Lfunc_begin0
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.short 1 # Loc expr size
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.byte 85 # super-register DW_OP_reg5
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.quad .Ltmp0-.Lfunc_begin0
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.quad .Lfunc_end0-.Lfunc_begin0
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.short 1 # Loc expr size
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.byte 80 # super-register DW_OP_reg0
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.quad 0
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.quad 0
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.Ldebug_loc2:
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.quad .Lfunc_begin0-.Lfunc_begin0
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.quad .Lfunc_end0-.Lfunc_begin0
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.short 0xdead # Loc expr size
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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 19 # DW_AT_language
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.byte 5 # DW_FORM_data2
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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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 46 # DW_TAG_subprogram
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.byte 1 # DW_CHILDREN_yes
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.byte 3 # DW_AT_name
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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 3 # Abbreviation Code
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.byte 5 # DW_TAG_formal_parameter
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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 4 # 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 14 # DW_FORM_strp
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.byte 62 # DW_AT_encoding
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.byte 11 # DW_FORM_data1
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.byte 11 # DW_AT_byte_size
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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 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 [1] 0xb:0x50 DW_TAG_compile_unit
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.long .Linfo_string0 # DW_AT_producer
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.short 12 # DW_AT_language
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.quad 0 # DW_AT_low_pc
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.long 0x100 # DW_AT_high_pc
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.byte 2 # Abbrev [2] 0x2a:0x29 DW_TAG_subprogram
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.long .Linfo_string3 # DW_AT_name
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.byte 3 # Abbrev [3] DW_TAG_formal_parameter
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.long .Lx0 # DW_AT_name
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.long .Ldebug_loc0 # DW_AT_location
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.byte 3 # Abbrev [3] DW_TAG_formal_parameter
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.long .Lx1 # DW_AT_name
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.long 0xdeadbeef # DW_AT_location
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.byte 3 # Abbrev [3] DW_TAG_formal_parameter
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.long .Lx2 # DW_AT_name
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.long .Ldebug_loc2 # DW_AT_location
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.byte 0 # End Of Children Mark
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.byte 0 # End Of Children Mark
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.Ldebug_info_end0:
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