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llvm-project/llvm/test/Instrumentation/SanitizerCoverage/wineh.ll

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[sancov] Don't instrument blocks with no insertion point 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
2017-03-24 07:30:41 +08:00
; RUN: opt < %s -sancov -sanitizer-coverage-level=3 -sanitizer-coverage-trace-pc -S | FileCheck %s --check-prefix=CHECK
[NewPM][Sancov] Make Sancov a Module Pass instead of 2 Passes This patch merges the sancov module and funciton passes into one module pass. The reason for this is because we ran into an out of memory error when attempting to run asan fuzzer on some protobufs (pc.cc files). I traced the OOM error to the destructor of SanitizerCoverage where we only call appendTo[Compiler]Used which calls appendToUsedList. I'm not sure where precisely in appendToUsedList causes the OOM, but I am able to confirm that it's calling this function *repeatedly* that causes the OOM. (I hacked sancov a bit such that I can still create and destroy a new sancov on every function run, but only call appendToUsedList after all functions in the module have finished. This passes, but when I make it such that appendToUsedList is called on every sancov destruction, we hit OOM.) I don't think the OOM is from just adding to the SmallSet and SmallVector inside appendToUsedList since in either case for a given module, they'll have the same max size. I suspect that when the existing llvm.compiler.used global is erased, the memory behind it isn't freed. I could be wrong on this though. This patch works around the OOM issue by just calling appendToUsedList at the end of every module run instead of function run. The same amount of constants still get added to llvm.compiler.used, abd we make the pass usage and logic simpler by not having any inter-pass dependencies. Differential Revision: https://reviews.llvm.org/D66988 llvm-svn: 370971
2019-09-05 04:30:29 +08:00
; RUN: opt < %s -passes='module(sancov-module)' -sanitizer-coverage-level=3 -sanitizer-coverage-trace-pc -S | FileCheck %s --check-prefix=CHECK
[sancov] Don't instrument blocks with no insertion point 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
2017-03-24 07:30:41 +08:00
; Generated from this C++ source:
; $ clang -O2 t.cpp -S -emit-llvm
; void g();
; struct Foo { Foo(); ~Foo(); };
; int f() {
; Foo v;
; g();
; try {
; g();
; } catch (int e) {
; g();
; } catch (...) {
; g();
; }
; return 0;
; }
; FIXME: We need to do more than this. In particular, __sanitizer_cov callbacks
; in funclets need token bundles.
; CHECK-LABEL: define i32 @"\01?f@@YAHXZ"()
; CHECK: catch.dispatch:
; CHECK-NEXT: catchswitch within none [label %catch3, label %catch] unwind label %ehcleanup
; ModuleID = 't.cpp'
source_filename = "t.cpp"
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc19.10.24728"
%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
%struct.Foo = type { i8 }
$"\01??_R0H@8" = comdat any
@"\01??_7type_info@@6B@" = external constant i8*
@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
; Function Attrs: uwtable
define i32 @"\01?f@@YAHXZ"() local_unnamed_addr #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
entry:
%v = alloca %struct.Foo, align 1
%e = alloca i32, align 4
%0 = getelementptr inbounds %struct.Foo, %struct.Foo* %v, i64 0, i32 0
call void @llvm.lifetime.start(i64 1, i8* nonnull %0) #4
%call = call %struct.Foo* @"\01??0Foo@@QEAA@XZ"(%struct.Foo* nonnull %v)
invoke void @"\01?g@@YAXXZ"()
to label %invoke.cont unwind label %ehcleanup
invoke.cont: ; preds = %entry
invoke void @"\01?g@@YAXXZ"()
to label %try.cont unwind label %catch.dispatch
catch.dispatch: ; preds = %invoke.cont
%1 = catchswitch within none [label %catch3, label %catch] unwind label %ehcleanup
catch3: ; preds = %catch.dispatch
%2 = catchpad within %1 [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i32* %e]
invoke void @"\01?g@@YAXXZ"() [ "funclet"(token %2) ]
to label %invoke.cont4 unwind label %ehcleanup
invoke.cont4: ; preds = %catch3
catchret from %2 to label %try.cont
try.cont: ; preds = %invoke.cont, %invoke.cont2, %invoke.cont4
call void @"\01??1Foo@@QEAA@XZ"(%struct.Foo* nonnull %v) #4
call void @llvm.lifetime.end(i64 1, i8* nonnull %0) #4
ret i32 0
catch: ; preds = %catch.dispatch
%3 = catchpad within %1 [i8* null, i32 64, i8* null]
invoke void @"\01?g@@YAXXZ"() [ "funclet"(token %3) ]
to label %invoke.cont2 unwind label %ehcleanup
invoke.cont2: ; preds = %catch
catchret from %3 to label %try.cont
ehcleanup: ; preds = %catch3, %catch, %catch.dispatch, %entry
%4 = cleanuppad within none []
call void @"\01??1Foo@@QEAA@XZ"(%struct.Foo* nonnull %v) #4 [ "funclet"(token %4) ]
call void @llvm.lifetime.end(i64 1, i8* nonnull %0) #4
cleanupret from %4 unwind to caller
}
; Function Attrs: argmemonly nounwind
declare void @llvm.lifetime.start(i64, i8* nocapture) #1
declare %struct.Foo* @"\01??0Foo@@QEAA@XZ"(%struct.Foo* returned) unnamed_addr #2
declare void @"\01?g@@YAXXZ"() local_unnamed_addr #2
declare i32 @__CxxFrameHandler3(...)
; Function Attrs: nounwind
declare void @"\01??1Foo@@QEAA@XZ"(%struct.Foo*) unnamed_addr #3
; Function Attrs: argmemonly nounwind
declare void @llvm.lifetime.end(i64, i8* nocapture) #1
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" }
attributes #1 = { argmemonly nounwind }
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" }
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" }
attributes #4 = { nounwind }
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"PIC Level", i32 2}
!1 = !{!"clang version 5.0.0 "}