61e36e87df
Current stack size diagnostics ignore the size of the unsafe stack. This patch attaches the size of the static portion of the unsafe stack to the function as metadata, which can be used by the backend to emit diagnostics regarding stack usage. Reviewed By: phosek, mcgrathr Differential Revision: https://reviews.llvm.org/D119996
99 lines
5.4 KiB
LLVM
99 lines
5.4 KiB
LLVM
; RUN: opt -safe-stack -safestack-use-pointer-address < %s -S | FileCheck %s
|
|
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
|
|
target triple = "armv7-pc-linux-android"
|
|
|
|
; Original C used to generate debug info:
|
|
; char*** addr;
|
|
; char** __safestack_pointer_address() {
|
|
; return *addr;
|
|
; }
|
|
; void Capture(char*x);
|
|
; void f() { char c[16]; Capture(c); }
|
|
|
|
; CHECK: !36 = !DILocation(line: 3, column: 11, scope: !17, inlinedAt: !37)
|
|
; CHECK: !37 = distinct !DILocation(line: 6, scope: !27)
|
|
|
|
@addr = common local_unnamed_addr global i8*** null, align 4, !dbg !0
|
|
|
|
; Function Attrs: norecurse nounwind readonly safestack
|
|
define i8** @__safestack_pointer_address() local_unnamed_addr #0 !dbg !17 {
|
|
entry:
|
|
%0 = load i8***, i8**** @addr, align 4, !dbg !20, !tbaa !21
|
|
%1 = load i8**, i8*** %0, align 4, !dbg !25, !tbaa !21
|
|
ret i8** %1, !dbg !26
|
|
}
|
|
|
|
; Function Attrs: nounwind safestack
|
|
define void @f() local_unnamed_addr #1 !dbg !27 {
|
|
entry:
|
|
%c = alloca [16 x i8], align 1
|
|
%0 = getelementptr inbounds [16 x i8], [16 x i8]* %c, i32 0, i32 0, !dbg !35
|
|
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %0) #5, !dbg !35
|
|
call void @llvm.dbg.declare(metadata [16 x i8]* %c, metadata !31, metadata !DIExpression()), !dbg !36
|
|
call void @Capture(i8* nonnull %0) #5, !dbg !37
|
|
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %0) #5, !dbg !38
|
|
ret void, !dbg !38
|
|
}
|
|
|
|
; Function Attrs: argmemonly nounwind
|
|
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #2
|
|
|
|
; Function Attrs: nounwind readnone speculatable
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) #3
|
|
|
|
declare void @Capture(i8*) local_unnamed_addr #4
|
|
|
|
; Function Attrs: argmemonly nounwind
|
|
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #2
|
|
|
|
attributes #0 = { norecurse nounwind readonly safestack "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+armv7-a,+dsp,+neon,+vfp3,-thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
attributes #1 = { nounwind safestack "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+armv7-a,+dsp,+neon,+vfp3,-thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
attributes #2 = { argmemonly nounwind }
|
|
attributes #3 = { nounwind readnone speculatable }
|
|
attributes #4 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+armv7-a,+dsp,+neon,+vfp3,-thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
attributes #5 = { nounwind }
|
|
|
|
!llvm.dbg.cu = !{!2}
|
|
!llvm.module.flags = !{!11, !12, !13, !14, !15}
|
|
!llvm.ident = !{!16}
|
|
|
|
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
|
|
!1 = distinct !DIGlobalVariable(name: "addr", scope: !2, file: !6, line: 1, type: !7, isLocal: false, isDefinition: true)
|
|
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
|
|
!3 = !DIFile(filename: "-", directory: "/")
|
|
!4 = !{}
|
|
!5 = !{!0}
|
|
!6 = !DIFile(filename: "<stdin>", directory: "/")
|
|
!7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 32)
|
|
!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 32)
|
|
!9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 32)
|
|
!10 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_unsigned_char)
|
|
!11 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!12 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!13 = !{i32 1, !"wchar_size", i32 4}
|
|
!14 = !{i32 1, !"min_enum_size", i32 4}
|
|
!15 = !{i32 7, !"PIC Level", i32 1}
|
|
!16 = !{!"clang"}
|
|
!17 = distinct !DISubprogram(name: "__safestack_pointer_address", scope: !6, file: !6, line: 2, type: !18, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: true, unit: !2, retainedNodes: !4)
|
|
!18 = !DISubroutineType(types: !19)
|
|
!19 = !{!8}
|
|
!20 = !DILocation(line: 3, column: 11, scope: !17)
|
|
!21 = !{!22, !22, i64 0}
|
|
!22 = !{!"any pointer", !23, i64 0}
|
|
!23 = !{!"omnipotent char", !24, i64 0}
|
|
!24 = !{!"Simple C/C++ TBAA"}
|
|
!25 = !DILocation(line: 3, column: 10, scope: !17)
|
|
!26 = !DILocation(line: 3, column: 3, scope: !17)
|
|
!27 = distinct !DISubprogram(name: "f", scope: !6, file: !6, line: 6, type: !28, isLocal: false, isDefinition: true, scopeLine: 6, isOptimized: true, unit: !2, retainedNodes: !30)
|
|
!28 = !DISubroutineType(types: !29)
|
|
!29 = !{null}
|
|
!30 = !{!31}
|
|
!31 = !DILocalVariable(name: "c", scope: !27, file: !6, line: 6, type: !32)
|
|
!32 = !DICompositeType(tag: DW_TAG_array_type, baseType: !10, size: 128, elements: !33)
|
|
!33 = !{!34}
|
|
!34 = !DISubrange(count: 16)
|
|
!35 = !DILocation(line: 6, column: 12, scope: !27)
|
|
!36 = !DILocation(line: 6, column: 17, scope: !27)
|
|
!37 = !DILocation(line: 6, column: 24, scope: !27)
|
|
!38 = !DILocation(line: 6, column: 36, scope: !27)
|