123c036bd3
This reverts the revert commit bee240367cc48bbc93fe5eb57d537968dfe4419f.
This version includes updates to the tests to use patterns when matching
the pointer argument.
Original commit message:
This patch extends Clang's TBAA generation code to emit distinct tags
for incompatible pointer types.
Pointers with different element types are incompatible if the pointee
types are also incompatible (modulo sugar/modifiers).
Express this in TBAA by generating different tags for pointers based on
the pointer depth and pointee type. To get the TBAA tag for the pointee
type it uses getTypeInfoHelper on the pointee type.
(Moved from https://reviews.llvm.org/D122573)
PR: https://github.com/llvm/llvm-project/pull/76612
98 lines
6.9 KiB
C
98 lines
6.9 KiB
C
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --check-attributes --check-globals --version 2
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// RUN: %clang_cc1 -O -fexperimental-sanitize-metadata=covered -fexperimental-sanitize-metadata=atomics -fexperimental-sanitize-metadata=uar -triple x86_64-gnu-linux -x c -emit-llvm %s -o - | FileCheck %s --check-prefixes=CHECK
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//.
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// CHECK: @__start_sanmd_covered2 = extern_weak hidden global ptr
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// CHECK: @__stop_sanmd_covered2 = extern_weak hidden global ptr
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// CHECK: @__start_sanmd_atomics2 = extern_weak hidden global ptr
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// CHECK: @__stop_sanmd_atomics2 = extern_weak hidden global ptr
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// CHECK: @llvm.used = appending global [4 x ptr] [ptr @__sanitizer_metadata_covered2.module_ctor, ptr @__sanitizer_metadata_covered2.module_dtor, ptr @__sanitizer_metadata_atomics2.module_ctor, ptr @__sanitizer_metadata_atomics2.module_dtor], section "llvm.metadata"
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// CHECK: @llvm.global_ctors = appending global [2 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 2, ptr @__sanitizer_metadata_covered2.module_ctor, ptr @__sanitizer_metadata_covered2.module_ctor }, { i32, ptr, ptr } { i32 2, ptr @__sanitizer_metadata_atomics2.module_ctor, ptr @__sanitizer_metadata_atomics2.module_ctor }]
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// CHECK: @llvm.global_dtors = appending global [2 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 2, ptr @__sanitizer_metadata_covered2.module_dtor, ptr @__sanitizer_metadata_covered2.module_dtor }, { i32, ptr, ptr } { i32 2, ptr @__sanitizer_metadata_atomics2.module_dtor, ptr @__sanitizer_metadata_atomics2.module_dtor }]
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//.
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// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(write, argmem: none, inaccessiblemem: none)
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// CHECK-LABEL: define dso_local void @escape
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// CHECK-SAME: (ptr noundef [[P:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] !pcsections [[META2:![0-9]+]] {
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// CHECK-NEXT: entry:
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// CHECK-NEXT: ret void
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//
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__attribute__((noinline, not_tail_called)) void escape(const volatile void *p) {
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static const volatile void *sink;
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sink = p;
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}
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// CHECK: Function Attrs: mustprogress nofree norecurse nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: none)
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// CHECK-LABEL: define dso_local i32 @normal_function
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// CHECK-SAME: (ptr noundef [[X:%.*]], ptr nocapture noundef readonly [[Y:%.*]]) local_unnamed_addr #[[ATTR1:[0-9]+]] !pcsections [[META4:![0-9]+]] {
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[X_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: store ptr [[X]], ptr [[X_ADDR]], align 8, !tbaa [[TBAA6:![0-9]+]]
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// CHECK-NEXT: store atomic i32 1, ptr [[X]] monotonic, align 4, !pcsections [[META11:![0-9]+]]
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// CHECK-NEXT: notail call void @escape(ptr noundef nonnull [[X_ADDR]])
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// CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[Y]], align 4, !tbaa [[TBAA12:![0-9]+]]
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// CHECK-NEXT: ret i32 [[TMP0]]
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//
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int normal_function(int *x, int *y) {
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__atomic_store_n(x, 1, __ATOMIC_RELAXED);
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escape(&x);
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return *y;
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}
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// CHECK: Function Attrs: disable_sanitizer_instrumentation mustprogress nofree norecurse nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: none)
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// CHECK-LABEL: define dso_local i32 @test_disable_sanitize_instrumentation
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// CHECK-SAME: (ptr noundef [[X:%.*]], ptr nocapture noundef readonly [[Y:%.*]]) local_unnamed_addr #[[ATTR2:[0-9]+]] {
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[X_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: store ptr [[X]], ptr [[X_ADDR]], align 8, !tbaa [[TBAA6]]
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// CHECK-NEXT: store atomic i32 1, ptr [[X]] monotonic, align 4
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// CHECK-NEXT: notail call void @escape(ptr noundef nonnull [[X_ADDR]])
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// CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[Y]], align 4, !tbaa [[TBAA12]]
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// CHECK-NEXT: ret i32 [[TMP0]]
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//
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__attribute__((disable_sanitizer_instrumentation)) int test_disable_sanitize_instrumentation(int *x, int *y) {
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__atomic_store_n(x, 1, __ATOMIC_RELAXED);
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escape(&x);
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return *y;
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}
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// CHECK: Function Attrs: mustprogress nofree norecurse nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: none)
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// CHECK-LABEL: define dso_local i32 @test_no_sanitize_thread
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// CHECK-SAME: (ptr noundef [[X:%.*]], ptr nocapture noundef readonly [[Y:%.*]]) local_unnamed_addr #[[ATTR3:[0-9]+]] !pcsections [[META14:![0-9]+]] {
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[X_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: store ptr [[X]], ptr [[X_ADDR]], align 8, !tbaa [[TBAA6]]
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// CHECK-NEXT: store atomic i32 1, ptr [[X]] monotonic, align 4, !pcsections [[META11]]
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// CHECK-NEXT: notail call void @escape(ptr noundef nonnull [[X_ADDR]])
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// CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[Y]], align 4, !tbaa [[TBAA12]]
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// CHECK-NEXT: ret i32 [[TMP0]]
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//
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__attribute__((no_sanitize("thread"))) int test_no_sanitize_thread(int *x, int *y) {
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__atomic_store_n(x, 1, __ATOMIC_RELAXED);
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escape(&x);
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return *y;
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}
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// CHECK: Function Attrs: mustprogress nofree norecurse nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: none)
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// CHECK-LABEL: define dso_local i32 @test_no_sanitize_all
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// CHECK-SAME: (ptr noundef [[X:%.*]], ptr nocapture noundef readonly [[Y:%.*]]) local_unnamed_addr #[[ATTR3]] !pcsections [[META14]] {
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[X_ADDR:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: store ptr [[X]], ptr [[X_ADDR]], align 8, !tbaa [[TBAA6]]
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// CHECK-NEXT: store atomic i32 1, ptr [[X]] monotonic, align 4, !pcsections [[META11]]
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// CHECK-NEXT: notail call void @escape(ptr noundef nonnull [[X_ADDR]])
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// CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[Y]], align 4, !tbaa [[TBAA12]]
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// CHECK-NEXT: ret i32 [[TMP0]]
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//
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__attribute__((no_sanitize("all"))) int test_no_sanitize_all(int *x, int *y) {
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__atomic_store_n(x, 1, __ATOMIC_RELAXED);
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escape(&x);
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return *y;
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}
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//.
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// CHECK: attributes #[[ATTR0]] = { mustprogress nofree noinline norecurse nosync nounwind willreturn memory(write, argmem: none, inaccessiblemem: none) "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+cx8,+mmx,+sse,+sse2,+x87" }
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// CHECK: attributes #[[ATTR1]] = { mustprogress nofree norecurse nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: none) "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+cx8,+mmx,+sse,+sse2,+x87" }
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// CHECK: attributes #[[ATTR2]] = { disable_sanitizer_instrumentation mustprogress nofree norecurse nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: none) "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+cx8,+mmx,+sse,+sse2,+x87" }
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// CHECK: attributes #[[ATTR3]] = { mustprogress nofree norecurse nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: none) "min-legal-vector-width"="0" "no-trapping-math"="true" "no_sanitize_thread" "stack-protector-buffer-size"="8" "target-features"="+cx8,+mmx,+sse,+sse2,+x87" }
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// CHECK: attributes #[[ATTR4:[0-9]+]] = { nounwind "target-features"="+cx8,+mmx,+sse,+sse2,+x87" }
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//.
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