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gerrit-public.fairphone.software / toolchain / llvm-project / 1d6ebdfb66b9d63d34f34ec6ac7ec57eff7cd24b / . / llvm / test / tools / llvm-symbolizer / split-dwarf-zero-signature-not-found.s
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Jorge Gorbe Moya314a0d72020-11-19 10:59:08 -0800[diff] [blame]1## This test checks that looking up a zero hash in the .debug_cu_index hash
2## table works correctly when there's no CU with signature = 0.
3##
4## LLVM used to check just the signature bits to decide if the hash lookup ended
5## at a match or at an empty slot. This is wrong when signature = 0 because
6## empty slots have all zeros in the signature field too, and LLVM would return
7## the empty slot as a valid result.
8
9# REQUIRES: x86-registered-target
10
11# RUN: llvm-mc --filetype=obj --triple x86_64 %s -o %t --defsym MAIN=0
12# RUN: llvm-mc --filetype=obj --triple x86_64 %s -o %t.dwp
13# RUN: llvm-symbolizer --obj=%t --dwp=%t.dwp 0x0 | FileCheck %s
14
15## This expected output is very uninteresting, but it's better than a crash.
16# CHECK: ??:0:0
17
18 .section .debug_abbrev,"",@progbits
19 .byte 1 # Abbreviation Code
20 .byte 17 # DW_TAG_compile_unit
21 .byte 0 # DW_CHILDREN_no
22 .ascii "\260B" # DW_AT_GNU_dwo_name
23 .byte 8 # DW_FORM_string
24 .ascii "\261B" # DW_AT_GNU_dwo_id
25 .byte 7 # DW_FORM_data8
26 .ascii "\263B" # DW_AT_GNU_addr_base
27 .byte 23 # DW_FORM_sec_offset
28 .byte 85 # DW_AT_ranges
29 .byte 23 # DW_FORM_sec_offset
30 .byte 0 # EOM(1)
31 .byte 0 # EOM(2)
32 .byte 0 # EOM(3)
33
34## Create two CUs, with dwo_ids 0 and 1 respectively.
35.ifdef MAIN
36.irpc I,01
37 .data
38A\I:
39 .long \I
40
41 .text
42F\I:
43 nop
44
45 .section .debug_info,"",@progbits
46.Lcu_begin\I:
47 .long .Ldebug_info_end\I-.Ldebug_info_start\I # Length of Unit
48.Ldebug_info_start\I:
49 .short 4 # DWARF version number
50 .long .debug_abbrev # Offset Into Abbrev. Section
51 .byte 8 # Address Size (in bytes)
52 .byte 1 # Abbrev [1] 0xb:0x25 DW_TAG_compile_unit
53 .asciz "A.dwo" # DW_AT_GNU_dwo_name
54 .quad \I # DW_AT_GNU_dwo_id
55 .long .debug_addr # DW_AT_GNU_addr_base
56 .long .Lranges\I # DW_AT_ranges
57.Ldebug_info_end\I:
58
59 .section .debug_addr,"",@progbits
60 .quad A\I
61 .quad F\I
62
63 .section .debug_ranges,"",@progbits
64.Lranges\I:
65 .quad F\I
66 .quad F\I+1
67 .quad 0
68 .quad 0
69.endr
70.else
71## Deliberately omit compile unit 0 in the DWP. We want to check the case where
72## a signature = 0 matches an empty hash slot in .debug_cu_index and the index
73## in the parallel table has to be checked.
74 .section .debug_abbrev.dwo,"e",@progbits
75.Labbrev1:
76 .byte 1 # Abbreviation Code
77 .byte 17 # DW_TAG_compile_unit
78 .byte 0 # DW_CHILDREN_no
79 .byte 37 # DW_AT_producer
80 .byte 8 # DW_FORM_string
81 .byte 3 # DW_AT_name
82 .byte 8 # DW_FORM_string
83 .byte 0 # EOM(1)
84 .byte 0 # EOM(2)
85 .byte 0 # EOM(3)
86.Labbrev_end1:
87
88 .section .debug_info.dwo,"e",@progbits
89.Lcu_begin1:
90 .long .Ldebug_info_end1-.Ldebug_info_start1 # Length of Unit
91.Ldebug_info_start1:
92 .short 4 # DWARF version number
93 .long 0 # Offset Into Abbrev. Section
94 .byte 8 # Address Size (in bytes)
95 .byte 1 # Abbrev DW_TAG_compile_unit
96 .asciz "Hand-written DWARF" # DW_AT_producer
97 .byte '1', '.', 'c', 0 # DW_AT_name
98.Ldebug_info_end1:
99
100 .section .debug_cu_index,"",@progbits
101 .long 2 # DWARF version number
102 .long 2 # Section count
103 .long 1 # Unit count
104 .long 8 # Slot count
105
106 .quad 1, 0, 0, 0, 0, 0, 0, 0 # Hash table
107 .long 1, 0, 0, 0, 0, 0, 0, 0 # Index table
108
109 .long 1 # DW_SECT_INFO
110 .long 3 # DW_SECT_ABBREV
111
112 .long .Lcu_begin1-.debug_info.dwo
113 .long .Labbrev1-.debug_abbrev.dwo
114
115 .long .Ldebug_info_end1-.Lcu_begin1
116 .long .Labbrev_end1-.Labbrev1
117
118.endif