| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -passes=hwasan -hwasan-use-after-scope=1 -hwasan-generate-tags-with-calls -S < %s | FileCheck %s --check-prefixes=SCOPE |
| ; RUN: opt -passes=hwasan -hwasan-use-after-scope=0 -hwasan-generate-tags-with-calls -S < %s | FileCheck %s --check-prefixes=NOSCOPE |
| |
| ; ModuleID = 'use-after-scope.c' |
| source_filename = "use-after-scope.c" |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define dso_local i32 @standard_lifetime() local_unnamed_addr sanitize_hwaddress { |
| ; SCOPE-LABEL: @standard_lifetime( |
| ; SCOPE-NEXT: [[DOTHWASAN_SHADOW:%.*]] = call i8* asm "", "=r,0"(i8* null) |
| ; SCOPE-NEXT: [[TMP1:%.*]] = alloca { i8, [15 x i8] }, align 16 |
| ; SCOPE-NEXT: [[TMP2:%.*]] = bitcast { i8, [15 x i8] }* [[TMP1]] to i8* |
| ; SCOPE-NEXT: [[TMP3:%.*]] = call i8 @__hwasan_generate_tag() |
| ; SCOPE-NEXT: [[TMP4:%.*]] = zext i8 [[TMP3]] to i64 |
| ; SCOPE-NEXT: [[TMP5:%.*]] = ptrtoint i8* [[TMP2]] to i64 |
| ; SCOPE-NEXT: [[TMP6:%.*]] = shl i64 [[TMP4]], 57 |
| ; SCOPE-NEXT: [[TMP7:%.*]] = or i64 [[TMP5]], [[TMP6]] |
| ; SCOPE-NEXT: [[ALLOCA_0_HWASAN:%.*]] = inttoptr i64 [[TMP7]] to i8* |
| ; SCOPE-NEXT: br label [[TMP8:%.*]] |
| ; SCOPE: 8: |
| ; SCOPE-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; SCOPE-NEXT: [[TMP9:%.*]] = trunc i64 [[TMP4]] to i8 |
| ; SCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 [[TMP9]], i64 16) |
| ; SCOPE-NEXT: [[TMP10:%.*]] = tail call i1 (...) @cond() |
| ; SCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 0, i64 16) |
| ; SCOPE-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; SCOPE-NEXT: br i1 [[TMP10]], label [[TMP11:%.*]], label [[TMP8]] |
| ; SCOPE: 11: |
| ; SCOPE-NEXT: call void @use(i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; SCOPE-NEXT: ret i32 0 |
| ; |
| ; NOSCOPE-LABEL: @standard_lifetime( |
| ; NOSCOPE-NEXT: [[DOTHWASAN_SHADOW:%.*]] = call i8* asm "", "=r,0"(i8* null) |
| ; NOSCOPE-NEXT: [[TMP1:%.*]] = alloca { i8, [15 x i8] }, align 16 |
| ; NOSCOPE-NEXT: [[TMP2:%.*]] = bitcast { i8, [15 x i8] }* [[TMP1]] to i8* |
| ; NOSCOPE-NEXT: [[TMP3:%.*]] = call i8 @__hwasan_generate_tag() |
| ; NOSCOPE-NEXT: [[TMP4:%.*]] = zext i8 [[TMP3]] to i64 |
| ; NOSCOPE-NEXT: [[TMP5:%.*]] = ptrtoint i8* [[TMP2]] to i64 |
| ; NOSCOPE-NEXT: [[TMP6:%.*]] = shl i64 [[TMP4]], 57 |
| ; NOSCOPE-NEXT: [[TMP7:%.*]] = or i64 [[TMP5]], [[TMP6]] |
| ; NOSCOPE-NEXT: [[ALLOCA_0_HWASAN:%.*]] = inttoptr i64 [[TMP7]] to i8* |
| ; NOSCOPE-NEXT: [[TMP8:%.*]] = trunc i64 [[TMP4]] to i8 |
| ; NOSCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 [[TMP8]], i64 16) |
| ; NOSCOPE-NEXT: br label [[TMP9:%.*]] |
| ; NOSCOPE: 9: |
| ; NOSCOPE-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; NOSCOPE-NEXT: [[TMP10:%.*]] = tail call i1 (...) @cond() |
| ; NOSCOPE-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; NOSCOPE-NEXT: br i1 [[TMP10]], label [[TMP11:%.*]], label [[TMP9]] |
| ; NOSCOPE: 11: |
| ; NOSCOPE-NEXT: call void @use(i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; NOSCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 0, i64 16) |
| ; NOSCOPE-NEXT: ret i32 0 |
| ; |
| %1 = alloca i8, align 1 |
| br label %2 |
| |
| 2: ; preds = %2, %0 |
| ; We should tag the memory after the br (in the loop). |
| call void @llvm.lifetime.start.p0i8(i64 1, i8* nonnull %1) |
| %3 = tail call i1 (...) @cond() #2 |
| ; We should tag the memory before the next br (before the jump back). |
| call void @llvm.lifetime.end.p0i8(i64 1, i8* nonnull %1) |
| br i1 %3, label %4, label %2 |
| |
| 4: ; preds = %2 |
| call void @use(i8* nonnull %1) #2 |
| ret i32 0 |
| } |
| |
| define dso_local i32 @multiple_lifetimes() local_unnamed_addr sanitize_hwaddress { |
| ; SCOPE-LABEL: @multiple_lifetimes( |
| ; SCOPE-NEXT: [[DOTHWASAN_SHADOW:%.*]] = call i8* asm "", "=r,0"(i8* null) |
| ; SCOPE-NEXT: [[TMP1:%.*]] = alloca { i8, [15 x i8] }, align 16 |
| ; SCOPE-NEXT: [[TMP2:%.*]] = bitcast { i8, [15 x i8] }* [[TMP1]] to i8* |
| ; SCOPE-NEXT: [[TMP3:%.*]] = call i8 @__hwasan_generate_tag() |
| ; SCOPE-NEXT: [[TMP4:%.*]] = zext i8 [[TMP3]] to i64 |
| ; SCOPE-NEXT: [[TMP5:%.*]] = ptrtoint i8* [[TMP2]] to i64 |
| ; SCOPE-NEXT: [[TMP6:%.*]] = shl i64 [[TMP4]], 57 |
| ; SCOPE-NEXT: [[TMP7:%.*]] = or i64 [[TMP5]], [[TMP6]] |
| ; SCOPE-NEXT: [[ALLOCA_0_HWASAN:%.*]] = inttoptr i64 [[TMP7]] to i8* |
| ; SCOPE-NEXT: [[TMP8:%.*]] = trunc i64 [[TMP4]] to i8 |
| ; SCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 [[TMP8]], i64 16) |
| ; SCOPE-NEXT: call void @use(i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; SCOPE-NEXT: call void @use(i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; SCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 0, i64 16) |
| ; SCOPE-NEXT: ret i32 0 |
| ; |
| ; NOSCOPE-LABEL: @multiple_lifetimes( |
| ; NOSCOPE-NEXT: [[DOTHWASAN_SHADOW:%.*]] = call i8* asm "", "=r,0"(i8* null) |
| ; NOSCOPE-NEXT: [[TMP1:%.*]] = alloca { i8, [15 x i8] }, align 16 |
| ; NOSCOPE-NEXT: [[TMP2:%.*]] = bitcast { i8, [15 x i8] }* [[TMP1]] to i8* |
| ; NOSCOPE-NEXT: [[TMP3:%.*]] = call i8 @__hwasan_generate_tag() |
| ; NOSCOPE-NEXT: [[TMP4:%.*]] = zext i8 [[TMP3]] to i64 |
| ; NOSCOPE-NEXT: [[TMP5:%.*]] = ptrtoint i8* [[TMP2]] to i64 |
| ; NOSCOPE-NEXT: [[TMP6:%.*]] = shl i64 [[TMP4]], 57 |
| ; NOSCOPE-NEXT: [[TMP7:%.*]] = or i64 [[TMP5]], [[TMP6]] |
| ; NOSCOPE-NEXT: [[ALLOCA_0_HWASAN:%.*]] = inttoptr i64 [[TMP7]] to i8* |
| ; NOSCOPE-NEXT: [[TMP8:%.*]] = trunc i64 [[TMP4]] to i8 |
| ; NOSCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 [[TMP8]], i64 16) |
| ; NOSCOPE-NEXT: call void @use(i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; NOSCOPE-NEXT: call void @use(i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; NOSCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 0, i64 16) |
| ; NOSCOPE-NEXT: ret i32 0 |
| ; |
| %1 = alloca i8, align 1 |
| ; We erase lifetime markers if we insert instrumentation outside of the |
| ; lifetime. |
| call void @llvm.lifetime.start.p0i8(i64 1, i8* nonnull %1) |
| call void @use(i8* nonnull %1) #2 |
| call void @llvm.lifetime.end.p0i8(i64 1, i8* nonnull %1) |
| call void @llvm.lifetime.start.p0i8(i64 1, i8* nonnull %1) |
| call void @use(i8* nonnull %1) #2 |
| call void @llvm.lifetime.end.p0i8(i64 1, i8* nonnull %1) |
| ret i32 0 |
| } |
| |
| define dso_local i32 @unreachable_exit() local_unnamed_addr sanitize_hwaddress { |
| ; SCOPE-LABEL: @unreachable_exit( |
| ; SCOPE-NEXT: [[DOTHWASAN_SHADOW:%.*]] = call i8* asm "", "=r,0"(i8* null) |
| ; SCOPE-NEXT: [[TMP1:%.*]] = alloca { i8, [15 x i8] }, align 16 |
| ; SCOPE-NEXT: [[TMP2:%.*]] = bitcast { i8, [15 x i8] }* [[TMP1]] to i8* |
| ; SCOPE-NEXT: [[TMP3:%.*]] = call i8 @__hwasan_generate_tag() |
| ; SCOPE-NEXT: [[TMP4:%.*]] = zext i8 [[TMP3]] to i64 |
| ; SCOPE-NEXT: [[TMP5:%.*]] = ptrtoint i8* [[TMP2]] to i64 |
| ; SCOPE-NEXT: [[TMP6:%.*]] = shl i64 [[TMP4]], 57 |
| ; SCOPE-NEXT: [[TMP7:%.*]] = or i64 [[TMP5]], [[TMP6]] |
| ; SCOPE-NEXT: [[ALLOCA_0_HWASAN:%.*]] = inttoptr i64 [[TMP7]] to i8* |
| ; SCOPE-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; SCOPE-NEXT: [[TMP8:%.*]] = trunc i64 [[TMP4]] to i8 |
| ; SCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 [[TMP8]], i64 16) |
| ; SCOPE-NEXT: [[TMP9:%.*]] = tail call i1 (...) @cond() |
| ; SCOPE-NEXT: br i1 [[TMP9]], label [[TMP10:%.*]], label [[TMP11:%.*]] |
| ; SCOPE: 10: |
| ; SCOPE-NEXT: call void @use(i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; SCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 0, i64 16) |
| ; SCOPE-NEXT: ret i32 0 |
| ; SCOPE: 11: |
| ; SCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 0, i64 16) |
| ; SCOPE-NEXT: ret i32 0 |
| ; |
| ; NOSCOPE-LABEL: @unreachable_exit( |
| ; NOSCOPE-NEXT: [[DOTHWASAN_SHADOW:%.*]] = call i8* asm "", "=r,0"(i8* null) |
| ; NOSCOPE-NEXT: [[TMP1:%.*]] = alloca { i8, [15 x i8] }, align 16 |
| ; NOSCOPE-NEXT: [[TMP2:%.*]] = bitcast { i8, [15 x i8] }* [[TMP1]] to i8* |
| ; NOSCOPE-NEXT: [[TMP3:%.*]] = call i8 @__hwasan_generate_tag() |
| ; NOSCOPE-NEXT: [[TMP4:%.*]] = zext i8 [[TMP3]] to i64 |
| ; NOSCOPE-NEXT: [[TMP5:%.*]] = ptrtoint i8* [[TMP2]] to i64 |
| ; NOSCOPE-NEXT: [[TMP6:%.*]] = shl i64 [[TMP4]], 57 |
| ; NOSCOPE-NEXT: [[TMP7:%.*]] = or i64 [[TMP5]], [[TMP6]] |
| ; NOSCOPE-NEXT: [[ALLOCA_0_HWASAN:%.*]] = inttoptr i64 [[TMP7]] to i8* |
| ; NOSCOPE-NEXT: [[TMP8:%.*]] = trunc i64 [[TMP4]] to i8 |
| ; NOSCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 [[TMP8]], i64 16) |
| ; NOSCOPE-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; NOSCOPE-NEXT: [[TMP9:%.*]] = tail call i1 (...) @cond() |
| ; NOSCOPE-NEXT: br i1 [[TMP9]], label [[TMP10:%.*]], label [[TMP11:%.*]] |
| ; NOSCOPE: 10: |
| ; NOSCOPE-NEXT: call void @use(i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; NOSCOPE-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* nonnull [[ALLOCA_0_HWASAN]]) |
| ; NOSCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 0, i64 16) |
| ; NOSCOPE-NEXT: ret i32 0 |
| ; NOSCOPE: 11: |
| ; NOSCOPE-NEXT: call void @__hwasan_tag_memory(i8* [[TMP2]], i8 0, i64 16) |
| ; NOSCOPE-NEXT: ret i32 0 |
| ; |
| %1 = alloca i8, align 1 |
| call void @llvm.lifetime.start.p0i8(i64 1, i8* nonnull %1) |
| %2 = tail call i1 (...) @cond() #2 |
| br i1 %2, label %3, label %4 |
| |
| 3: |
| call void @use(i8* nonnull %1) #2 |
| call void @llvm.lifetime.end.p0i8(i64 1, i8* nonnull %1) |
| ret i32 0 |
| |
| 4: |
| ret i32 0 |
| } |
| |
| declare dso_local i1 @cond(...) local_unnamed_addr |
| |
| declare dso_local void @use(i8*) local_unnamed_addr |
| |
| ; Function Attrs: argmemonly mustprogress nofree nosync nounwind willreturn |
| declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) |
| |
| ; Function Attrs: argmemonly mustprogress nofree nosync nounwind willreturn |
| declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) |