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2c7f02f5dc
This prevents crashes when attempting to instrument functions containing C++ try. Sanitizer coverage will still fail at runtime when an exception is thrown through a sancov instrumented function, but that seems marginally better than what we have now. The full solution is to color the blocks in LLVM IR and only instrument blocks that have an unambiguous color, using the appropriate token. llvm-svn: 298662
112 lines
5.0 KiB
LLVM
112 lines
5.0 KiB
LLVM
; RUN: opt < %s -sancov -sanitizer-coverage-level=3 -sanitizer-coverage-trace-pc -S | FileCheck %s --check-prefix=CHECK
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; Generated from this C++ source:
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; $ clang -O2 t.cpp -S -emit-llvm
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; void g();
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; struct Foo { Foo(); ~Foo(); };
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; int f() {
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; Foo v;
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; g();
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; try {
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; g();
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; } catch (int e) {
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; g();
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; } catch (...) {
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; g();
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; }
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; return 0;
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; }
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; FIXME: We need to do more than this. In particular, __sanitizer_cov callbacks
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; in funclets need token bundles.
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; CHECK-LABEL: define i32 @"\01?f@@YAHXZ"()
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; CHECK: catch.dispatch:
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; CHECK-NEXT: catchswitch within none [label %catch3, label %catch] unwind label %ehcleanup
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; ModuleID = 't.cpp'
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source_filename = "t.cpp"
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc19.10.24728"
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%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
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%struct.Foo = type { i8 }
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$"\01??_R0H@8" = comdat any
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@"\01??_7type_info@@6B@" = external constant i8*
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@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
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; Function Attrs: uwtable
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define i32 @"\01?f@@YAHXZ"() local_unnamed_addr #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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entry:
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%v = alloca %struct.Foo, align 1
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%e = alloca i32, align 4
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%0 = getelementptr inbounds %struct.Foo, %struct.Foo* %v, i64 0, i32 0
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call void @llvm.lifetime.start(i64 1, i8* nonnull %0) #4
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%call = call %struct.Foo* @"\01??0Foo@@QEAA@XZ"(%struct.Foo* nonnull %v)
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invoke void @"\01?g@@YAXXZ"()
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to label %invoke.cont unwind label %ehcleanup
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invoke.cont: ; preds = %entry
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invoke void @"\01?g@@YAXXZ"()
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to label %try.cont unwind label %catch.dispatch
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catch.dispatch: ; preds = %invoke.cont
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%1 = catchswitch within none [label %catch3, label %catch] unwind label %ehcleanup
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catch3: ; preds = %catch.dispatch
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%2 = catchpad within %1 [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i32* %e]
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invoke void @"\01?g@@YAXXZ"() [ "funclet"(token %2) ]
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to label %invoke.cont4 unwind label %ehcleanup
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invoke.cont4: ; preds = %catch3
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catchret from %2 to label %try.cont
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try.cont: ; preds = %invoke.cont, %invoke.cont2, %invoke.cont4
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call void @"\01??1Foo@@QEAA@XZ"(%struct.Foo* nonnull %v) #4
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call void @llvm.lifetime.end(i64 1, i8* nonnull %0) #4
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ret i32 0
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catch: ; preds = %catch.dispatch
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%3 = catchpad within %1 [i8* null, i32 64, i8* null]
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invoke void @"\01?g@@YAXXZ"() [ "funclet"(token %3) ]
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to label %invoke.cont2 unwind label %ehcleanup
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invoke.cont2: ; preds = %catch
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catchret from %3 to label %try.cont
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ehcleanup: ; preds = %catch3, %catch, %catch.dispatch, %entry
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%4 = cleanuppad within none []
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call void @"\01??1Foo@@QEAA@XZ"(%struct.Foo* nonnull %v) #4 [ "funclet"(token %4) ]
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call void @llvm.lifetime.end(i64 1, i8* nonnull %0) #4
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cleanupret from %4 unwind to caller
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}
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.start(i64, i8* nocapture) #1
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declare %struct.Foo* @"\01??0Foo@@QEAA@XZ"(%struct.Foo* returned) unnamed_addr #2
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declare void @"\01?g@@YAXXZ"() local_unnamed_addr #2
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declare i32 @__CxxFrameHandler3(...)
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; Function Attrs: nounwind
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declare void @"\01??1Foo@@QEAA@XZ"(%struct.Foo*) unnamed_addr #3
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end(i64, i8* nocapture) #1
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attributes #0 = { uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { argmemonly nounwind }
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attributes #2 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #3 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #4 = { nounwind }
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!llvm.module.flags = !{!0}
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!llvm.ident = !{!1}
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!0 = !{i32 1, !"PIC Level", i32 2}
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!1 = !{!"clang version 5.0.0 "}
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