a136699b2a
Current user_id_t format is:
63{isDebugTypes} 62..32{dwo || 7fffffff}
31..0 {die_offset}
while current DIERef format is (I have made up the bit positions but the
field widths do match):
63{m_section==isDebugTypes} 62{m_dwo_num_valid} 61..32{m_dwo_num}
31..0 {m_die_offset}
Proposing to change user_id_t to:
63{isDebugTypes} 62{dwo_is_valid} 61..32{dwo; 0 if !valid}
31..0 {die_offset}
There is no benefit of having 31-bits wide dwo_num in user_id_t when it
gets converted to 30-bits width in DIERef.
This patch is for future DWZ patchset which extends the dwo_is_valid bit
into a 2-bit field (normal, DWO, DWZ, DWZcommon) so that both user_id_t
and DIERef can be changed then the same way.
It would be best to somehow unify user_id_t and DIERef but I do not plan
to do that. user_id_t should probably remain a number for the Python API
compatibility while there still needs to be some class with all the
methods to access it.
SymbolFileDWARF::GetDwpSymbolFile() and SymbolFileDWARF::GetDIE use
0x3fffffff for DWP but that does not clash:
formerly:
31bits32..62:0x7fffffff = normal unit / not any DWO
31bits32..62:0x3fffffff = DWP
31bits32..62:others = DWO unit number
after this patch:
bit62=0 30bits32..61:any = normal unit / not any DWO
bit62=1 30bits32..61:0x3fffffff = DWP
bit62=1 30bits32..61:others = DWO unit number
Differential Revision: https://reviews.llvm.org/D90413
152 lines
6.9 KiB
ArmAsm
152 lines
6.9 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 -o "image lookup -v -s lookup_rnglists" \
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# RUN: -o "image lookup -v -s lookup_rnglists2" -o exit | FileCheck %s
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# CHECK-LABEL: image lookup -v -s lookup_rnglists
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# CHECK: Function: id = {0x00000030}, name = "rnglists", range = [0x0000000000000000-0x0000000000000004)
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# CHECK: Blocks: id = {0x00000030}, range = [0x00000000-0x00000004)
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# CHECK-NEXT: id = {0x00000046}, ranges = [0x00000001-0x00000002)[0x00000003-0x00000004)
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# CHECK-LABEL: image lookup -v -s lookup_rnglists2
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# CHECK: Function: id = {0x0000007a}, name = "rnglists2", range = [0x0000000000000004-0x0000000000000007)
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# CHECK: Blocks: id = {0x0000007a}, range = [0x00000004-0x00000007)
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# CHECK-NEXT: id = {0x00000091}, range = [0x00000005-0x00000007)
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.text
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.p2align 12
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rnglists:
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nop
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.Lblock1_begin:
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lookup_rnglists:
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nop
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.Lblock1_end:
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nop
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.Lblock2_begin:
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nop
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.Lblock2_end:
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.Lrnglists_end:
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rnglists2:
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nop
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.Lblock3_begin:
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lookup_rnglists2:
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nop
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nop
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.Lblock3_end:
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.Lrnglists2_end:
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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 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 116 # DW_AT_rnglists_base
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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 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 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 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 5 # Abbreviation Code
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.byte 11 # DW_TAG_lexical_block
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.byte 0 # DW_CHILDREN_no
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.byte 85 # DW_AT_ranges
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.byte 35 # DW_FORM_rnglistx
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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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.byte 1 # Abbrev [1] 0xc:0x5f DW_TAG_compile_unit
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.asciz "Hand-written DWARF" # DW_AT_producer
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.quad rnglists # DW_AT_low_pc
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.long .Lrnglists_end-rnglists # DW_AT_high_pc
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.long .Lrnglists_table_base0 # DW_AT_rnglists_base
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.byte 2 # Abbrev [2] 0x2b:0x37 DW_TAG_subprogram
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.quad rnglists # DW_AT_low_pc
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.long .Lrnglists_end-rnglists # DW_AT_high_pc
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.asciz "rnglists" # DW_AT_name
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.byte 5 # Abbrev [5] 0x52:0xf DW_TAG_lexical_block
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.byte 0 # DW_AT_ranges
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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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.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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.byte 1 # Abbrev [1] 0xc:0x5f DW_TAG_compile_unit
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.asciz "Hand-written DWARF" # DW_AT_producer
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.quad rnglists2 # DW_AT_low_pc
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.long .Lrnglists2_end-rnglists2 # DW_AT_high_pc
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.long .Lrnglists_table_base1 # DW_AT_rnglists_base
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.byte 2 # Abbrev [2] 0x2b:0x37 DW_TAG_subprogram
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.quad rnglists2 # DW_AT_low_pc
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.long .Lrnglists2_end-rnglists2 # DW_AT_high_pc
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.asciz "rnglists2" # DW_AT_name
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.byte 5 # Abbrev [5] 0x52:0xf DW_TAG_lexical_block
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.byte 0 # DW_AT_ranges
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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_end1:
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.section .debug_rnglists,"",@progbits
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.long .Ldebug_rnglist_table_end0-.Ldebug_rnglist_table_start0 # Length
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.Ldebug_rnglist_table_start0:
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.short 5 # Version
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.byte 8 # Address size
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.byte 0 # Segment selector size
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.long 1 # Offset entry count
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.Lrnglists_table_base0:
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.long .Ldebug_ranges0-.Lrnglists_table_base0
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.Ldebug_ranges0:
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.byte 4 # DW_RLE_offset_pair
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.uleb128 .Lblock1_begin-rnglists # starting offset
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.uleb128 .Lblock1_end-rnglists # ending offset
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.byte 4 # DW_RLE_offset_pair
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.uleb128 .Lblock2_begin-rnglists # starting offset
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.uleb128 .Lblock2_end-rnglists # ending offset
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.byte 0 # DW_RLE_end_of_list
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.Ldebug_rnglist_table_end0:
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.long .Ldebug_rnglist_table_end1-.Ldebug_rnglist_table_start1 # Length
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.Ldebug_rnglist_table_start1:
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.short 5 # Version
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.byte 8 # Address size
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.byte 0 # Segment selector size
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.long 1 # Offset entry count
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.Lrnglists_table_base1:
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.long .Ldebug_ranges1-.Lrnglists_table_base1
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.Ldebug_ranges1:
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.byte 4 # DW_RLE_offset_pair
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.uleb128 .Lblock3_begin-rnglists2 # starting offset
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.uleb128 .Lblock3_end-rnglists2 # ending offset
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.byte 0 # DW_RLE_end_of_list
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.Ldebug_rnglist_table_end1:
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