1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
## Test the "--skip-line-zero" option.
##
## This test uses handcrafted assembly to produce the following line table:
## Address Line Column File ISA Discriminator OpIndex Flags
## ------------------ ------ ------ ------ --- ------------- ------- -------------
## 0x0000000000001710 1 0 1 0 0 0
## 0x0000000000001714 0 0 1 0 0 0
## 0x0000000000001719 1 2 1 0 0 0
## 0x000000000000171b 1 2 1 0 0 0 end_sequence
## 0x00000000000016c0 0 0 1 0 0 0
## 0x00000000000016cf 2 0 1 0 0 0
## 0x00000000000016d4 0 0 1 0 0 0
## 0x00000000000016d9 0 0 1 0 0 0
## 0x00000000000016df 0 0 1 0 0 0 end_sequence
# REQUIRES: x86-registered-target
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
## Check that without '--skip-line-zero', line zero is displayed for a line-table entry which has no source correspondence.
# RUN: llvm-symbolizer --obj=%t.o -f=none 0x16d4 | FileCheck --strict-whitespace --match-full-lines --check-prefix=DISABLE %s
# DISABLE:main.c:0:0
## Check that the '--skip-line-zero' does not cross sequence boundaries.
## If it fails to find in the current sequence then line zero is returned for the queried address.
# RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero 0x16c0 | FileCheck --strict-whitespace --match-full-lines --check-prefix=FAIL-ACROSS-SEQ %s
# FAIL-ACROSS-SEQ:main.c:0:0
## Check that with '--skip-line-zero', the last non-zero line in the current sequence is displayed.
# RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero 0x1717 | FileCheck --strict-whitespace --match-full-lines --check-prefix=WITHIN-SEQ %s
# WITHIN-SEQ:main.c:1:0 (approximate)
## Check that with '--skip-line-zero', multiple line zero rows are skipped within the current sequence.
# RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero 0x16d9 | FileCheck --strict-whitespace --match-full-lines --check-prefix=MULTIPLE-ROWS %s
# MULTIPLE-ROWS:main.c:2:0 (approximate)
## Check that '--skip-line-zero' only affects the line zero addresses when more than one address is specified.
# RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero 0x16d4 0x1719 | FileCheck --strict-whitespace --match-full-lines --check-prefixes=ENABLE,NO-APPROX %s
# ENABLE:main.c:2:0 (approximate)
# NO-APPROX:main.c:1:2
## Check to ensure that '--skip-line-zero' with '--verbose' enabled displays approximate flag in verbose ouptut.
# RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero --verbose 0x1717 | FileCheck --strict-whitespace --match-full-lines --check-prefix=VERBOSE %s
# VERBOSE: Filename: main.c
# VERBOSE-NEXT: Line: 1
# VERBOSE-NEXT: Column: 0
# VERBOSE-NEXT: Approximate: true
## Check to ensure that '--skip-line-zero' with '--output-style=JSON' displays approximate flag in JSON output.
# RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero --output-style=JSON 0x1717 | FileCheck --strict-whitespace --match-full-lines --check-prefix=JSON %s
# JSON:[{"Address":"0x1717","ModuleName":"{{.*}}{{[/|\]+}}skip-line-zero.s{{.*}}","Symbol":[{"Approximate":true,"Column":0,"Discriminator":0,"FileName":"main.c","FunctionName":"","Line":1,"StartAddress":"","StartFileName":"","StartLine":0}]}]
## main.c
## __attribute__((section("def"))) int foo() { return 1234; }
## int main(void) { return foo()+5678; }
##
## Generated using
## clang -S -gdwarf-4 --target=x86_64-pc-linux -fdebug-prefix-map=/tmp="" main.c -o main.s
##
## Sections belonging to code segment(.text) are removed. Sections related to debug information(other than .debug_line) are modified. Section .debug_line is handwritten. Section .debug_str is deleted.
.section .debug_abbrev,"",@progbits
.byte 1 # Abbreviation Code
.byte 17 # DW_TAG_compile_unit
.byte 0 # DW_CHILDREN_no
.byte 16 # DW_AT_stmt_list
.byte 23 # DW_FORM_sec_offset
.byte 17 # DW_AT_low_pc
.byte 1 # DW_FORM_addr
.byte 85 # DW_AT_ranges
.byte 23 # DW_FORM_sec_offset
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 0 # EOM(3)
.section .debug_info,"",@progbits
.Lcu_begin0:
.long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
.Ldebug_info_start0:
.short 4 # DWARF version number
.long .debug_abbrev # Offset Into Abbrev. Section
.byte 8 # Address Size (in bytes)
.byte 1 # Abbrev [1] 0xb:0x55 DW_TAG_compile_unit
.long .Lline_table_start0 # DW_AT_stmt_list
.quad 0 # DW_AT_low_pc
.long .Ldebug_ranges0 # DW_AT_ranges
.byte 0 # End Of Children Mark
.Ldebug_info_end0:
.section .debug_ranges,"",@progbits
.Ldebug_ranges0:
.quad 0x1710 #.Lfunc_begin0
.quad 0x171b #.Lfunc_end0
.quad 0x16c0 #.Lfunc_begin1
.quad 0x16df #.Lfunc_end1
.quad 0
.quad 0
.section .debug_line,"",@progbits
.Lline_table_start0:
.long .Lunit_end - .Lunit_start # unit length
.Lunit_start:
.short 4 # version
.long .Lprologue_end - .Lprologue_start # header length
.Lprologue_start:
.byte 1 # minimum_instruction_length
.byte 1 # maximum_operations_per_instruction
.byte 0 # default_is_stmt
.byte -5 # line_base
.byte 14 # line_range
.byte 13 # opcode_base
.byte 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1 # arguments in standard opcodes
.byte 0 # end of include directories
.asciz "main.c" # filename
.byte 0 # directory index
.byte 0 # modification time
.byte 0 # length of file (unavailable)
.byte 0 # end of filenames
.Lprologue_end:
.byte 0x00, 9, 2 # DW_LNE_set_address
.quad 0x1710 # Address Value
.byte 0x01 # DW_LNS_copy
.byte 0x49 # (address += 4, line += -1, op-index += 0)
.byte 0x05, 2 # DW_LNS_set_column (2)
.byte 0x59 # (address += 5, line += 1, op-index += 0)
.byte 0x02 # DW_LNS_advance_pc
.uleb128 0x02 # (addr += 2, op-index += 0)
.byte 0x00, 1, 1 # DW_LNE_end_sequence
.byte 0x00, 9, 2 # DW_LNE_set_address
.quad 0x16c0 # Address Value
.byte 0x11 # (address += 0, line += -1, op-index += 0)
.byte 0xe6 # (address += 15, line += 2, op-index += 0)
.byte 0x56 # (address += 5, line += -2, op-index += 0)
.byte 0x58 # (address += 5, line += 0, op-index += 0)
.byte 0x02 # DW_LNS_advance_pc
.uleb128 0x06 # (addr += 6, op-index += 0)
.byte 0x00, 1, 1 # DW_LNE_end_sequence
.Lunit_end:
|
