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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
; ModuleID = 'bpftrace'
source_filename = "bpftrace"
target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128"
target triple = "bpf"
%"struct map_internal_repr_t" = type { ptr, ptr, ptr, ptr }
%"struct map_internal_repr_t.0" = type { ptr, ptr, ptr, ptr }
%"struct map_internal_repr_t.1" = type { ptr, ptr }
@LICENSE = global [4 x i8] c"GPL\00", section "license", !dbg !0
@AT_x = dso_local global %"struct map_internal_repr_t" zeroinitializer, section ".maps", !dbg !7
@AT_y = dso_local global %"struct map_internal_repr_t.0" zeroinitializer, section ".maps", !dbg !26
@ringbuf = dso_local global %"struct map_internal_repr_t.1" zeroinitializer, section ".maps", !dbg !35
@__bt__max_cpu_id = dso_local externally_initialized constant i64 0, section ".rodata", !dbg !49
@__bt__event_loss_counter = dso_local externally_initialized global [1 x [1 x i64]] zeroinitializer, section ".data.event_loss_counter", !dbg !51
@__bt__num_cpus = dso_local externally_initialized constant i64 0, section ".rodata", !dbg !57
; Function Attrs: nounwind
declare i64 @llvm.bpf.pseudo(i64 %0, i64 %1) #0
; Function Attrs: nounwind
define i64 @kprobe_f_1(ptr %0) #0 section "s_kprobe_f_1" !dbg !63 {
entry:
%"@x_key11" = alloca i64, align 8
%"@x_key9" = alloca i64, align 8
%initial_value7 = alloca i64, align 8
%lookup_elem_val5 = alloca i64, align 8
%"@y_key" = alloca [16 x i8], align 1
%initial_value = alloca i64, align 8
%lookup_elem_val = alloca i64, align 8
%"@x_key" = alloca i64, align 8
call void @llvm.lifetime.start.p0(i64 -1, ptr %"@x_key")
store i64 1, ptr %"@x_key", align 8
%lookup_elem = call ptr inttoptr (i64 1 to ptr)(ptr @AT_x, ptr %"@x_key")
call void @llvm.lifetime.start.p0(i64 -1, ptr %lookup_elem_val)
%map_lookup_cond = icmp ne ptr %lookup_elem, null
br i1 %map_lookup_cond, label %lookup_success, label %lookup_failure
lookup_success: ; preds = %entry
%1 = load i64, ptr %lookup_elem, align 8
%2 = add i64 %1, 1
store i64 %2, ptr %lookup_elem, align 8
br label %lookup_merge
lookup_failure: ; preds = %entry
call void @llvm.lifetime.start.p0(i64 -1, ptr %initial_value)
store i64 1, ptr %initial_value, align 8
%update_elem = call i64 inttoptr (i64 2 to ptr)(ptr @AT_x, ptr %"@x_key", ptr %initial_value, i64 0)
call void @llvm.lifetime.end.p0(i64 -1, ptr %initial_value)
br label %lookup_merge
lookup_merge: ; preds = %lookup_failure, %lookup_success
call void @llvm.lifetime.end.p0(i64 -1, ptr %lookup_elem_val)
call void @llvm.lifetime.end.p0(i64 -1, ptr %"@x_key")
%log2 = call i64 @log2(i64 10, i64 0)
call void @llvm.lifetime.start.p0(i64 -1, ptr %"@y_key")
%3 = getelementptr [16 x i8], ptr %"@y_key", i64 0, i64 0
store i64 0, ptr %3, align 8
%4 = getelementptr [16 x i8], ptr %"@y_key", i64 0, i64 8
store i64 %log2, ptr %4, align 8
%lookup_elem1 = call ptr inttoptr (i64 1 to ptr)(ptr @AT_y, ptr %"@y_key")
call void @llvm.lifetime.start.p0(i64 -1, ptr %lookup_elem_val5)
%map_lookup_cond6 = icmp ne ptr %lookup_elem1, null
br i1 %map_lookup_cond6, label %lookup_success2, label %lookup_failure3
lookup_success2: ; preds = %lookup_merge
%5 = load i64, ptr %lookup_elem1, align 8
%6 = add i64 %5, 1
store i64 %6, ptr %lookup_elem1, align 8
br label %lookup_merge4
lookup_failure3: ; preds = %lookup_merge
call void @llvm.lifetime.start.p0(i64 -1, ptr %initial_value7)
store i64 1, ptr %initial_value7, align 8
%update_elem8 = call i64 inttoptr (i64 2 to ptr)(ptr @AT_y, ptr %"@y_key", ptr %initial_value7, i64 0)
call void @llvm.lifetime.end.p0(i64 -1, ptr %initial_value7)
br label %lookup_merge4
lookup_merge4: ; preds = %lookup_failure3, %lookup_success2
call void @llvm.lifetime.end.p0(i64 -1, ptr %lookup_elem_val5)
call void @llvm.lifetime.end.p0(i64 -1, ptr %"@y_key")
call void @llvm.lifetime.start.p0(i64 -1, ptr %"@x_key9")
store i64 1, ptr %"@x_key9", align 8
%lookup_elem10 = call ptr inttoptr (i64 1 to ptr)(ptr @AT_x, ptr %"@x_key9")
%has_key = icmp ne ptr %lookup_elem10, null
call void @llvm.lifetime.end.p0(i64 -1, ptr %"@x_key9")
call void @llvm.lifetime.start.p0(i64 -1, ptr %"@x_key11")
store i64 1, ptr %"@x_key11", align 8
%delete_elem = call i64 inttoptr (i64 3 to ptr)(ptr @AT_x, ptr %"@x_key11")
%delete_ret = icmp eq i64 %delete_elem, 0
call void @llvm.lifetime.end.p0(i64 -1, ptr %"@x_key11")
ret i64 0
}
; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg %0, ptr nocapture %1) #1
; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg %0, ptr nocapture %1) #1
; Function Attrs: alwaysinline nounwind
define internal i64 @log2(i64 %0, i64 %1) #2 section "helpers" {
entry:
%2 = alloca i64, align 8
%3 = alloca i64, align 8
call void @llvm.lifetime.start.p0(i64 -1, ptr %3)
store i64 %0, ptr %3, align 8
call void @llvm.lifetime.start.p0(i64 -1, ptr %2)
store i64 %1, ptr %2, align 8
%4 = load i64, ptr %3, align 8
%5 = icmp slt i64 %4, 0
br i1 %5, label %hist.is_less_than_zero, label %hist.is_not_less_than_zero
hist.is_less_than_zero: ; preds = %entry
ret i64 0
hist.is_not_less_than_zero: ; preds = %entry
%6 = load i64, ptr %2, align 8
%7 = shl i64 1, %6
%8 = sub i64 %7, 1
%9 = icmp ule i64 %4, %8
br i1 %9, label %hist.is_zero, label %hist.is_not_zero
hist.is_zero: ; preds = %hist.is_not_less_than_zero
%10 = add i64 %4, 1
ret i64 %10
hist.is_not_zero: ; preds = %hist.is_not_less_than_zero
%11 = icmp sge i64 %4, 4294967296
%12 = zext i1 %11 to i64
%13 = shl i64 %12, 5
%14 = lshr i64 %4, %13
%15 = add i64 0, %13
%16 = icmp sge i64 %14, 65536
%17 = zext i1 %16 to i64
%18 = shl i64 %17, 4
%19 = lshr i64 %14, %18
%20 = add i64 %15, %18
%21 = icmp sge i64 %19, 256
%22 = zext i1 %21 to i64
%23 = shl i64 %22, 3
%24 = lshr i64 %19, %23
%25 = add i64 %20, %23
%26 = icmp sge i64 %24, 16
%27 = zext i1 %26 to i64
%28 = shl i64 %27, 2
%29 = lshr i64 %24, %28
%30 = add i64 %25, %28
%31 = icmp sge i64 %29, 4
%32 = zext i1 %31 to i64
%33 = shl i64 %32, 1
%34 = lshr i64 %29, %33
%35 = add i64 %30, %33
%36 = icmp sge i64 %34, 2
%37 = zext i1 %36 to i64
%38 = shl i64 %37, 0
%39 = lshr i64 %34, %38
%40 = add i64 %35, %38
%41 = sub i64 %40, %6
%42 = load i64, ptr %3, align 8
%43 = lshr i64 %42, %41
%44 = and i64 %43, %8
%45 = add i64 %41, 1
%46 = shl i64 %45, %6
%47 = add i64 %46, %44
%48 = add i64 %47, 1
ret i64 %48
}
attributes #0 = { nounwind }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { alwaysinline nounwind }
!llvm.dbg.cu = !{!59}
!llvm.module.flags = !{!61, !62}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "LICENSE", linkageName: "global", scope: !2, file: !2, type: !3, isLocal: false, isDefinition: true)
!2 = !DIFile(filename: "bpftrace.bpf.o", directory: ".")
!3 = !DICompositeType(tag: DW_TAG_array_type, baseType: !4, size: 32, elements: !5)
!4 = !DIBasicType(name: "int8", size: 8, encoding: DW_ATE_signed)
!5 = !{!6}
!6 = !DISubrange(count: 4, lowerBound: 0)
!7 = !DIGlobalVariableExpression(var: !8, expr: !DIExpression())
!8 = distinct !DIGlobalVariable(name: "AT_x", linkageName: "global", scope: !2, file: !2, type: !9, isLocal: false, isDefinition: true)
!9 = !DICompositeType(tag: DW_TAG_structure_type, scope: !2, file: !2, size: 256, elements: !10)
!10 = !{!11, !17, !22, !25}
!11 = !DIDerivedType(tag: DW_TAG_member, name: "type", scope: !2, file: !2, baseType: !12, size: 64)
!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64)
!13 = !DICompositeType(tag: DW_TAG_array_type, baseType: !14, size: 160, elements: !15)
!14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!15 = !{!16}
!16 = !DISubrange(count: 5, lowerBound: 0)
!17 = !DIDerivedType(tag: DW_TAG_member, name: "max_entries", scope: !2, file: !2, baseType: !18, size: 64, offset: 64)
!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
!19 = !DICompositeType(tag: DW_TAG_array_type, baseType: !14, size: 131072, elements: !20)
!20 = !{!21}
!21 = !DISubrange(count: 4096, lowerBound: 0)
!22 = !DIDerivedType(tag: DW_TAG_member, name: "key", scope: !2, file: !2, baseType: !23, size: 64, offset: 128)
!23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !24, size: 64)
!24 = !DIBasicType(name: "int64", size: 64, encoding: DW_ATE_signed)
!25 = !DIDerivedType(tag: DW_TAG_member, name: "value", scope: !2, file: !2, baseType: !23, size: 64, offset: 192)
!26 = !DIGlobalVariableExpression(var: !27, expr: !DIExpression())
!27 = distinct !DIGlobalVariable(name: "AT_y", linkageName: "global", scope: !2, file: !2, type: !28, isLocal: false, isDefinition: true)
!28 = !DICompositeType(tag: DW_TAG_structure_type, scope: !2, file: !2, size: 256, elements: !29)
!29 = !{!11, !17, !30, !25}
!30 = !DIDerivedType(tag: DW_TAG_member, name: "key", scope: !2, file: !2, baseType: !31, size: 64, offset: 128)
!31 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !32, size: 64)
!32 = !DICompositeType(tag: DW_TAG_array_type, baseType: !4, size: 128, elements: !33)
!33 = !{!34}
!34 = !DISubrange(count: 16, lowerBound: 0)
!35 = !DIGlobalVariableExpression(var: !36, expr: !DIExpression())
!36 = distinct !DIGlobalVariable(name: "ringbuf", linkageName: "global", scope: !2, file: !2, type: !37, isLocal: false, isDefinition: true)
!37 = !DICompositeType(tag: DW_TAG_structure_type, scope: !2, file: !2, size: 128, elements: !38)
!38 = !{!39, !44}
!39 = !DIDerivedType(tag: DW_TAG_member, name: "type", scope: !2, file: !2, baseType: !40, size: 64)
!40 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !41, size: 64)
!41 = !DICompositeType(tag: DW_TAG_array_type, baseType: !14, size: 864, elements: !42)
!42 = !{!43}
!43 = !DISubrange(count: 27, lowerBound: 0)
!44 = !DIDerivedType(tag: DW_TAG_member, name: "max_entries", scope: !2, file: !2, baseType: !45, size: 64, offset: 64)
!45 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !46, size: 64)
!46 = !DICompositeType(tag: DW_TAG_array_type, baseType: !14, size: 8388608, elements: !47)
!47 = !{!48}
!48 = !DISubrange(count: 262144, lowerBound: 0)
!49 = !DIGlobalVariableExpression(var: !50, expr: !DIExpression())
!50 = distinct !DIGlobalVariable(name: "__bt__max_cpu_id", linkageName: "global", scope: !2, file: !2, type: !24, isLocal: false, isDefinition: true)
!51 = !DIGlobalVariableExpression(var: !52, expr: !DIExpression())
!52 = distinct !DIGlobalVariable(name: "__bt__event_loss_counter", linkageName: "global", scope: !2, file: !2, type: !53, isLocal: false, isDefinition: true)
!53 = !DICompositeType(tag: DW_TAG_array_type, baseType: !54, size: 64, elements: !55)
!54 = !DICompositeType(tag: DW_TAG_array_type, baseType: !24, size: 64, elements: !55)
!55 = !{!56}
!56 = !DISubrange(count: 1, lowerBound: 0)
!57 = !DIGlobalVariableExpression(var: !58, expr: !DIExpression())
!58 = distinct !DIGlobalVariable(name: "__bt__num_cpus", linkageName: "global", scope: !2, file: !2, type: !24, isLocal: false, isDefinition: true)
!59 = distinct !DICompileUnit(language: DW_LANG_C, file: !2, producer: "bpftrace", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, globals: !60)
!60 = !{!0, !7, !26, !35, !49, !51, !57}
!61 = !{i32 2, !"Debug Info Version", i32 3}
!62 = !{i32 7, !"uwtable", i32 0}
!63 = distinct !DISubprogram(name: "kprobe_f_1", linkageName: "kprobe_f_1", scope: !2, file: !2, type: !64, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !59, retainedNodes: !67)
!64 = !DISubroutineType(types: !65)
!65 = !{!24, !66}
!66 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64)
!67 = !{!68}
!68 = !DILocalVariable(name: "ctx", arg: 1, scope: !63, file: !2, type: !66)
|
