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[asancov] Fix coverage line info some more.

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Now it should always point to the opening brace of the function (in
-asan-coverage=1 mode).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210266 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evgeniy Stepanov 2014-06-05 14:34:45 +00:00
parent 0eacd38666
commit b49c13cc84
2 changed files with 55 additions and 19 deletions
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6
lib/Transforms/Instrumentation/AddressSanitizer.cpp
View File

@ -1254,7 +1254,9 @@ void AddressSanitizer::InjectCoverageAtBlock(Function &F, BasicBlock &BB) {
break;
}
DebugLoc EntryLoc = IP->getDebugLoc().getFnDebugLoc(*C);
IRBuilder<> IRB(IP);
IRB.SetCurrentDebugLocation(EntryLoc);
Type *Int8Ty = IRB.getInt8Ty();
GlobalVariable *Guard = new GlobalVariable(
*F.getParent(), Int8Ty, false, GlobalValue::PrivateLinkage,
@ -1266,10 +1268,10 @@ void AddressSanitizer::InjectCoverageAtBlock(Function &F, BasicBlock &BB) {
Instruction *Ins = SplitBlockAndInsertIfThen(
Cmp, IP, false, MDBuilder(*C).createBranchWeights(1, 100000));
IRB.SetInsertPoint(Ins);
IRB.SetCurrentDebugLocation(EntryLoc);
// We pass &F to __sanitizer_cov. We could avoid this and rely on
// GET_CALLER_PC, but having the PC of the first instruction is just nice.
Instruction *Call = IRB.CreateCall(AsanCovFunction);
Call->setDebugLoc(IP->getDebugLoc());
IRB.CreateCall(AsanCovFunction);
StoreInst *Store = IRB.CreateStore(ConstantInt::get(Int8Ty, 1), Guard);
Store->setAtomic(Monotonic);
Store->setAlignment(1);

68
test/Instrumentation/AddressSanitizer/coverage-dbg.ll
View File

@ -2,32 +2,66 @@
; RUN: opt < %s -asan -asan-module -asan-coverage=1 -S | FileCheck %s
; C++ source:
; 1: struct A {
; 2: int f();
; 3: int x;
; 4: };
; 5:
; 6: int A::f() {
; 7: return x;
; 8: }
; clang++ ../1.cc -O3 -g -S -emit-llvm -fno-strict-aliasing
; and add sanitize_address to @_ZN1A1fEv
; Test that __sanitizer_cov call has !dbg pointing to the opening { of A::f().
; CHECK: call void @__sanitizer_cov(), !dbg [[A:!.*]]
; CHECK: [[A]] = metadata !{i32 6, i32 0, metadata !{{.*}}, null}
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; Function Attrs: nounwind readnone uwtable
define void @_Z1fv() #0 {
%struct.A = type { i32 }
; Function Attrs: nounwind readonly uwtable
define i32 @_ZN1A1fEv(%struct.A* nocapture readonly %this) #0 align 2 {
entry:
ret void, !dbg !11
tail call void @llvm.dbg.value(metadata !{%struct.A* %this}, i64 0, metadata !15), !dbg !20
%x = getelementptr inbounds %struct.A* %this, i64 0, i32 0, !dbg !21
%0 = load i32* %x, align 4, !dbg !21
ret i32 %0, !dbg !21
}
; CHECK: call void @__sanitizer_cov(), !dbg !
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata) #1
attributes #0 = { sanitize_address nounwind readnone uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #0 = { sanitize_address nounwind readonly uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!8, !9}
!llvm.ident = !{!10}
!llvm.module.flags = !{!17, !18}
!llvm.ident = !{!19}
!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 (208682)", i1 true, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp//tmp/1.cc] [DW_LANG_C_plus_plus]
!1 = metadata !{metadata !"/tmp/1.cc", metadata !"/tmp"}
!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 (210251)", i1 true, metadata !"", i32 0, metadata !2, metadata !3, metadata !12, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/code/llvm/build0/../1.cc] [DW_LANG_C_plus_plus]
!1 = metadata !{metadata !"../1.cc", metadata !"/code/llvm/build0"}
!2 = metadata !{}
!3 = metadata !{metadata !4}
!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"f", metadata !"f", metadata !"_Z1fv", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void ()* @_Z1fv, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [f]
!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp//tmp/1.cc]
!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!7 = metadata !{null}
!8 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!9 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
!10 = metadata !{metadata !"clang version 3.5.0 (208682)"}
!11 = metadata !{i32 2, i32 0, metadata !4, null}
!4 = metadata !{i32 786451, metadata !1, null, metadata !"A", i32 1, i64 32, i64 32, i32 0, i32 0, null, metadata !5, i32 0, null, null, metadata !"_ZTS1A"} ; [ DW_TAG_structure_type ] [A] [line 1, size 32, align 32, offset 0] [def] [from ]
!5 = metadata !{metadata !6, metadata !8}
!6 = metadata !{i32 786445, metadata !1, metadata !"_ZTS1A", metadata !"x", i32 3, i64 32, i64 32, i64 0, i32 0, metadata !7} ; [ DW_TAG_member ] [x] [line 3, size 32, align 32, offset 0] [from int]
!7 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
!8 = metadata !{i32 786478, metadata !1, metadata !"_ZTS1A", metadata !"f", metadata !"f", metadata !"_ZN1A1fEv", i32 2, metadata !9, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, null, i32 2} ; [ DW_TAG_subprogram ] [line 2] [f]
!9 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !10, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!10 = metadata !{metadata !7, metadata !11}
!11 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !"_ZTS1A"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from _ZTS1A]
!12 = metadata !{metadata !13}
!13 = metadata !{i32 786478, metadata !1, metadata !"_ZTS1A", metadata !"f", metadata !"f", metadata !"_ZN1A1fEv", i32 6, metadata !9, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 (%struct.A*)* @_ZN1A1fEv, null, metadata !8, metadata !14, i32 6} ; [ DW_TAG_subprogram ] [line 6] [def] [f]
!14 = metadata !{metadata !15}
!15 = metadata !{i32 786689, metadata !13, metadata !"this", null, i32 16777216, metadata !16, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this] [line 0]
!16 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !"_ZTS1A"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from _ZTS1A]
!17 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!18 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
!19 = metadata !{metadata !"clang version 3.5.0 (210251)"}
!20 = metadata !{i32 0, i32 0, metadata !13, null}
!21 = metadata !{i32 7, i32 0, metadata !13, null}