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; 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 }
%exit_t = type <{ i64, i8 }>
@LICENSE = global [4 x i8] c"GPL\00", section "license", !dbg !0
@ringbuf = dso_local global %"struct map_internal_repr_t" zeroinitializer, section ".maps", !dbg !7
@__bt__event_loss_counter = dso_local externally_initialized global [1 x [1 x i64]] zeroinitializer, section ".data.event_loss_counter", !dbg !22
@__bt__max_cpu_id = dso_local externally_initialized constant i64 0, section ".rodata", !dbg !29
; 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 !35 {
entry:
%exit = alloca %exit_t, align 8
%n = alloca i32, align 4
%i = alloca i32, align 4
%arraycmp.result = alloca i1, align 1
%v2 = alloca i32, align 4
%v1 = alloca i32, align 4
%"$b" = alloca ptr, align 8
call void @llvm.lifetime.start.p0(i64 -1, ptr %"$b")
store i0 0, ptr %"$b", align 1
%"$a" = alloca ptr, align 8
call void @llvm.lifetime.start.p0(i64 -1, ptr %"$a")
store i0 0, ptr %"$a", align 1
%1 = call ptr @llvm.preserve.static.offset(ptr %0)
%2 = getelementptr i8, ptr %1, i64 112
%arg0 = load volatile i64, ptr %2, align 8
%3 = inttoptr i64 %arg0 to ptr
%4 = call ptr @llvm.preserve.static.offset(ptr %3)
%5 = getelementptr i8, ptr %4, i64 0
%6 = ptrtoint ptr %5 to i64
store i64 %6, ptr %"$a", align 8
%7 = call ptr @llvm.preserve.static.offset(ptr %0)
%8 = getelementptr i8, ptr %7, i64 112
%arg01 = load volatile i64, ptr %8, align 8
%9 = inttoptr i64 %arg01 to ptr
%10 = call ptr @llvm.preserve.static.offset(ptr %9)
%11 = getelementptr i8, ptr %10, i64 0
%12 = ptrtoint ptr %11 to i64
store i64 %12, ptr %"$b", align 8
%13 = load ptr, ptr %"$a", align 8
%14 = load ptr, ptr %"$b", align 8
call void @llvm.lifetime.start.p0(i64 -1, ptr %v1)
call void @llvm.lifetime.start.p0(i64 -1, ptr %v2)
call void @llvm.lifetime.start.p0(i64 -1, ptr %arraycmp.result)
store i1 true, ptr %arraycmp.result, align 1
call void @llvm.lifetime.start.p0(i64 -1, ptr %i)
call void @llvm.lifetime.start.p0(i64 -1, ptr %n)
store i32 0, ptr %i, align 4
store i32 4, ptr %n, align 4
br label %while_cond
if_body: ; preds = %arraycmp.done
call void @llvm.lifetime.start.p0(i64 -1, ptr %exit)
%15 = getelementptr %exit_t, ptr %exit, i64 0, i32 0
store i64 30000, ptr %15, align 8
%16 = getelementptr %exit_t, ptr %exit, i64 0, i32 1
store i8 0, ptr %16, align 1
%ringbuf_output = call i64 inttoptr (i64 130 to ptr)(ptr @ringbuf, ptr %exit, i64 9, i64 0)
%ringbuf_loss = icmp slt i64 %ringbuf_output, 0
br i1 %ringbuf_loss, label %event_loss_counter, label %counter_merge
if_end: ; preds = %deadcode, %arraycmp.done
ret i64 0
while_cond: ; preds = %arraycmp.loop, %entry
%17 = load i32, ptr %n, align 4
%18 = load i32, ptr %i, align 4
%size_check = icmp slt i32 %18, %17
br i1 %size_check, label %while_body, label %arraycmp.done, !llvm.loop !41
while_body: ; preds = %while_cond
%19 = load i32, ptr %i, align 4
%20 = getelementptr [4 x i32], ptr %13, i32 0, i32 %19
%probe_read_kernel = call i64 inttoptr (i64 113 to ptr)(ptr %v1, i32 4, ptr %20)
%21 = load i32, ptr %v1, align 4
%22 = load i32, ptr %i, align 4
%23 = getelementptr [4 x i32], ptr %14, i32 0, i32 %22
%probe_read_kernel2 = call i64 inttoptr (i64 113 to ptr)(ptr %v2, i32 4, ptr %23)
%24 = load i32, ptr %v2, align 4
%arraycmp.cmp = icmp ne i32 %21, %24
br i1 %arraycmp.cmp, label %arraycmp.false, label %arraycmp.loop
arraycmp.false: ; preds = %while_body
store i1 false, ptr %arraycmp.result, align 1
br label %arraycmp.done
arraycmp.done: ; preds = %arraycmp.false, %while_cond
%25 = load i1, ptr %arraycmp.result, align 1
call void @llvm.lifetime.end.p0(i64 -1, ptr %arraycmp.result)
call void @llvm.lifetime.end.p0(i64 -1, ptr %v1)
call void @llvm.lifetime.end.p0(i64 -1, ptr %v2)
%26 = zext i1 %25 to i64
%true_cond = icmp ne i64 %26, 0
br i1 %true_cond, label %if_body, label %if_end
arraycmp.loop: ; preds = %while_body
%27 = load i32, ptr %i, align 4
%28 = add i32 %27, 1
store i32 %28, ptr %i, align 4
br label %while_cond
event_loss_counter: ; preds = %if_body
%get_cpu_id = call i64 inttoptr (i64 8 to ptr)() #3
%29 = load i64, ptr @__bt__max_cpu_id, align 8
%cpu.id.bounded = and i64 %get_cpu_id, %29
%30 = getelementptr [1 x [1 x i64]], ptr @__bt__event_loss_counter, i64 0, i64 %cpu.id.bounded, i64 0
%31 = load i64, ptr %30, align 8
%32 = add i64 %31, 1
store i64 %32, ptr %30, align 8
br label %counter_merge
counter_merge: ; preds = %event_loss_counter, %if_body
call void @llvm.lifetime.end.p0(i64 -1, ptr %exit)
ret i64 0
deadcode: ; No predecessors!
br label %if_end
}
; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare ptr @llvm.preserve.static.offset(ptr readnone %0) #1
; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg %0, ptr nocapture %1) #2
; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg %0, ptr nocapture %1) #2
attributes #0 = { nounwind }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { memory(none) }
!llvm.dbg.cu = !{!31}
!llvm.module.flags = !{!33, !34}
!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: "ringbuf", linkageName: "global", scope: !2, file: !2, type: !9, isLocal: false, isDefinition: true)
!9 = !DICompositeType(tag: DW_TAG_structure_type, scope: !2, file: !2, size: 128, elements: !10)
!10 = !{!11, !17}
!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: 864, elements: !15)
!14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!15 = !{!16}
!16 = !DISubrange(count: 27, 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: 8388608, elements: !20)
!20 = !{!21}
!21 = !DISubrange(count: 262144, lowerBound: 0)
!22 = !DIGlobalVariableExpression(var: !23, expr: !DIExpression())
!23 = distinct !DIGlobalVariable(name: "__bt__event_loss_counter", linkageName: "global", scope: !2, file: !2, type: !24, isLocal: false, isDefinition: true)
!24 = !DICompositeType(tag: DW_TAG_array_type, baseType: !25, size: 64, elements: !27)
!25 = !DICompositeType(tag: DW_TAG_array_type, baseType: !26, size: 64, elements: !27)
!26 = !DIBasicType(name: "int64", size: 64, encoding: DW_ATE_signed)
!27 = !{!28}
!28 = !DISubrange(count: 1, lowerBound: 0)
!29 = !DIGlobalVariableExpression(var: !30, expr: !DIExpression())
!30 = distinct !DIGlobalVariable(name: "__bt__max_cpu_id", linkageName: "global", scope: !2, file: !2, type: !26, isLocal: false, isDefinition: true)
!31 = distinct !DICompileUnit(language: DW_LANG_C, file: !2, producer: "bpftrace", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, globals: !32)
!32 = !{!0, !7, !22, !29}
!33 = !{i32 2, !"Debug Info Version", i32 3}
!34 = !{i32 7, !"uwtable", i32 0}
!35 = distinct !DISubprogram(name: "kprobe_f_1", linkageName: "kprobe_f_1", scope: !2, file: !2, type: !36, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !31, retainedNodes: !39)
!36 = !DISubroutineType(types: !37)
!37 = !{!26, !38}
!38 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64)
!39 = !{!40}
!40 = !DILocalVariable(name: "ctx", arg: 1, scope: !35, file: !2, type: !38)
!41 = distinct !{!41, !42}
!42 = !{!"llvm.loop.unroll.disable"}
|
