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.
105 lines
4.0 KiB
C++
105 lines
4.0 KiB
C++
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 6
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// RUN: %clang_cc1 -std=c++11 -triple x86_64-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefixes=ITANIUM,LINUX
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// RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-macos -emit-llvm %s -o - | FileCheck %s --check-prefixes=ITANIUM,DARWIN
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// RUN: %clang_cc1 -std=c++11 -triple x86_64-windows-pc -emit-llvm %s -o - | FileCheck %s --check-prefix=WINDOWS
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// Aliases for ifuncs
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// Overloaded ifuncs
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// struct 'C' ifuncs, note the 'float, U' one doesn't get one.
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//
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int __attribute__((target_clones("sse4.2", "default"))) overloaded(int) { return 1; }
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//
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int __attribute__((target_clones("arch=ivybridge", "default"))) overloaded(const char *) { return 2; }
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// LINUX-LABEL: define dso_local void @_Z14use_overloadedv(
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// LINUX-SAME: ) #[[ATTR1:[0-9]+]] {
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// LINUX-NEXT: [[ENTRY:.*:]]
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// LINUX-NEXT: [[CALL:%.*]] = call noundef i32 @_Z10overloadedi(i32 noundef 1)
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// LINUX-NEXT: [[CALL1:%.*]] = call noundef i32 @_Z10overloadedPKc(ptr noundef null)
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// LINUX-NEXT: ret void
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//
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// DARWIN-LABEL: define void @_Z14use_overloadedv(
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// DARWIN-SAME: ) #[[ATTR1:[0-9]+]] {
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// DARWIN-NEXT: [[ENTRY:.*:]]
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// DARWIN-NEXT: [[CALL:%.*]] = call noundef i32 @_Z10overloadedi(i32 noundef 1)
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// DARWIN-NEXT: [[CALL1:%.*]] = call noundef i32 @_Z10overloadedPKc(ptr noundef null)
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// DARWIN-NEXT: ret void
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//
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void use_overloaded() {
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overloaded(1);
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overloaded(nullptr);
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}
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template<typename T, typename U>
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struct C {
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int __attribute__((target_clones("sse4.2", "default"))) foo(){ return 1;}
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};
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template<typename U>
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struct C<int, U> {
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int __attribute__((target_clones("sse4.2", "default"))) foo(){ return 2;}
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};
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template<typename U>
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struct C<float, U> {
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int foo(){ return 2;}
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};
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template<>
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//
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struct C<double, float> {
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int __attribute__((target_clones("sse4.2", "default"))) foo(){ return 3;}
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};
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// LINUX-LABEL: define dso_local void @_Z16uses_specializedv(
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// LINUX-SAME: ) #[[ATTR1]] {
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// LINUX-NEXT: [[ENTRY:.*:]]
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// LINUX-NEXT: [[C:%.*]] = alloca [[STRUCT_C:%.*]], align 1
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// LINUX-NEXT: [[C2:%.*]] = alloca [[STRUCT_C_0:%.*]], align 1
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// LINUX-NEXT: [[C3:%.*]] = alloca [[STRUCT_C_1:%.*]], align 1
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// LINUX-NEXT: [[C4:%.*]] = alloca [[STRUCT_C_2:%.*]], align 1
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// LINUX-NEXT: [[CALL:%.*]] = call noundef i32 @_ZN1CIssE3fooEv(ptr noundef nonnull align 1 dereferenceable(1) [[C]])
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// LINUX-NEXT: [[CALL1:%.*]] = call noundef i32 @_ZN1CIisE3fooEv(ptr noundef nonnull align 1 dereferenceable(1) [[C2]])
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// LINUX-NEXT: [[CALL2:%.*]] = call noundef i32 @_ZN1CIfsE3fooEv(ptr noundef nonnull align 1 dereferenceable(1) [[C3]])
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// LINUX-NEXT: [[CALL3:%.*]] = call noundef i32 @_ZN1CIdfE3fooEv(ptr noundef nonnull align 1 dereferenceable(1) [[C4]])
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// LINUX-NEXT: ret void
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//
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// DARWIN-LABEL: define void @_Z16uses_specializedv(
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// DARWIN-SAME: ) #[[ATTR1]] {
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// DARWIN-NEXT: [[ENTRY:.*:]]
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// DARWIN-NEXT: [[C:%.*]] = alloca [[STRUCT_C:%.*]], align 1
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// DARWIN-NEXT: [[C2:%.*]] = alloca [[STRUCT_C_0:%.*]], align 1
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// DARWIN-NEXT: [[C3:%.*]] = alloca [[STRUCT_C_1:%.*]], align 1
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// DARWIN-NEXT: [[C4:%.*]] = alloca [[STRUCT_C_2:%.*]], align 1
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// DARWIN-NEXT: [[CALL:%.*]] = call noundef i32 @_ZN1CIssE3fooEv(ptr noundef nonnull align 1 dereferenceable(1) [[C]])
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// DARWIN-NEXT: [[CALL1:%.*]] = call noundef i32 @_ZN1CIisE3fooEv(ptr noundef nonnull align 1 dereferenceable(1) [[C2]])
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// DARWIN-NEXT: [[CALL2:%.*]] = call noundef i32 @_ZN1CIfsE3fooEv(ptr noundef nonnull align 1 dereferenceable(1) [[C3]])
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// DARWIN-NEXT: [[CALL3:%.*]] = call noundef i32 @_ZN1CIdfE3fooEv(ptr noundef nonnull align 1 dereferenceable(1) [[C4]])
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// DARWIN-NEXT: ret void
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//
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void uses_specialized() {
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C<short, short> c;
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c.foo();
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C<int, short> c2;
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c2.foo();
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C<float, short> c3;
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c3.foo();
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// Note this is not an ifunc/mv
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C<double, float> c4;
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c4.foo();
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}
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//// NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
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// ITANIUM: {{.*}}
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// WINDOWS: {{.*}}
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