0ff0892470
- Fixes https://github.com/llvm/llvm-project/issues/163369 - Segmentation fault occurred because resolver was calling TSan instrumentation functions (__tsan_func_entry, __tsan_func_exit) but as the resolver is run by the dynamic linker at load time, TSan is not initialized yet so the current thread pointer is null. - This PR adds the DisableSanitizerInstrumentation attribute to the multiversion function resolvers to avoid issues like this. - Added regression test for TSan segfault.
109 lines
3.9 KiB
C++
109 lines
3.9 KiB
C++
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --check-globals all --include-generated-funcs --global-value-regex ".*" --version 5
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// RUN: %clang_cc1 -triple aarch64-linux-gnu -emit-llvm %s -o - | FileCheck %s
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namespace Name {
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int __attribute((target_version("default"))) foo() { return 0; }
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}
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namespace Name {
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int __attribute((target_version("sve"))) foo() { return 1; }
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}
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int bar() { return Name::foo(); }
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namespace OtherName {
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int __attribute((target_version("sve"))) foo() { return 2; }
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}
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int baz() { return OtherName::foo(); }
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namespace Foo {
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int bar();
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__attribute((target_version("default"))) int bar() { return 0; }
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__attribute((target_version("mops"))) int bar() { return 1; }
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}
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//.
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// CHECK: @__aarch64_cpu_features = external dso_local global { i64 }
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// CHECK: @_ZN4Name3fooEv = weak_odr ifunc i32 (), ptr @_ZN4Name3fooEv.resolver
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// CHECK: @_ZN3Foo3barEv = weak_odr ifunc i32 (), ptr @_ZN3Foo3barEv.resolver
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//.
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// CHECK-LABEL: define dso_local noundef i32 @_ZN4Name3fooEv.default(
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// CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: ret i32 0
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//
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//
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// CHECK-LABEL: define dso_local noundef i32 @_ZN4Name3fooEv._Msve(
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// CHECK-SAME: ) #[[ATTR1:[0-9]+]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: ret i32 1
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//
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//
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// CHECK-LABEL: define dso_local noundef i32 @_Z3barv(
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// CHECK-SAME: ) #[[ATTR2:[0-9]+]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: [[CALL:%.*]] = call noundef i32 @_ZN4Name3fooEv()
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// CHECK-NEXT: ret i32 [[CALL]]
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//
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//
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// CHECK-LABEL: define dso_local noundef i32 @_ZN9OtherName3fooEv._Msve(
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// CHECK-SAME: ) #[[ATTR1]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: ret i32 2
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//
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//
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// CHECK-LABEL: define dso_local noundef i32 @_Z3bazv(
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// CHECK-SAME: ) #[[ATTR2]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: [[CALL:%.*]] = call noundef i32 @_ZN9OtherName3fooEv()
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// CHECK-NEXT: ret i32 [[CALL]]
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//
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//
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// CHECK-LABEL: define dso_local noundef i32 @_ZN3Foo3barEv.default(
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// CHECK-SAME: ) #[[ATTR0]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: ret i32 0
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//
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//
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// CHECK-LABEL: define dso_local noundef i32 @_ZN3Foo3barEv._Mmops(
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// CHECK-SAME: ) #[[ATTR4:[0-9]+]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: ret i32 1
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//
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//
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// CHECK-LABEL: define weak_odr ptr @_ZN4Name3fooEv.resolver(
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// CHECK-SAME: ) #[[ATTR_RESOLVER:[0-9]+]] comdat {
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// CHECK-NEXT: [[RESOLVER_ENTRY:.*:]]
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// CHECK-NEXT: call void @__init_cpu_features_resolver()
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// CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
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// CHECK-NEXT: [[TMP1:%.*]] = and i64 [[TMP0]], 1073807616
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// CHECK-NEXT: [[TMP2:%.*]] = icmp eq i64 [[TMP1]], 1073807616
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// CHECK-NEXT: [[TMP3:%.*]] = and i1 true, [[TMP2]]
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// CHECK-NEXT: br i1 [[TMP3]], label %[[RESOLVER_RETURN:.*]], label %[[RESOLVER_ELSE:.*]]
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// CHECK: [[RESOLVER_RETURN]]:
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// CHECK-NEXT: ret ptr @_ZN4Name3fooEv._Msve
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// CHECK: [[RESOLVER_ELSE]]:
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// CHECK-NEXT: ret ptr @_ZN4Name3fooEv.default
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//
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//
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// CHECK-LABEL: define weak_odr ptr @_ZN3Foo3barEv.resolver(
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// CHECK-SAME: ) #[[ATTR_RESOLVER]] comdat {
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// CHECK-NEXT: [[RESOLVER_ENTRY:.*:]]
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// CHECK-NEXT: call void @__init_cpu_features_resolver()
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// CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
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// CHECK-NEXT: [[TMP1:%.*]] = and i64 [[TMP0]], 576460752303423488
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// CHECK-NEXT: [[TMP2:%.*]] = icmp eq i64 [[TMP1]], 576460752303423488
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// CHECK-NEXT: [[TMP3:%.*]] = and i1 true, [[TMP2]]
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// CHECK-NEXT: br i1 [[TMP3]], label %[[RESOLVER_RETURN:.*]], label %[[RESOLVER_ELSE:.*]]
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// CHECK: [[RESOLVER_RETURN]]:
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// CHECK-NEXT: ret ptr @_ZN3Foo3barEv._Mmops
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// CHECK: [[RESOLVER_ELSE]]:
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// CHECK-NEXT: ret ptr @_ZN3Foo3barEv.default
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//
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// CHECK: attributes #[[ATTR_RESOLVER]] = { disable_sanitizer_instrumentation }
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//.
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// CHECK: [[META0:![0-9]+]] = !{i32 1, !"wchar_size", i32 4}
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// CHECK: [[META1:![0-9]+]] = !{!"{{.*}}clang version {{.*}}"}
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//.
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