1; RUN: opt < %s -asan -asan-module -enable-new-pm=0 -asan-use-after-return -S | FileCheck --check-prefix=CHECK-UAR %s 2; RUN: opt < %s -passes='asan-pipeline' -asan-use-after-return -S | FileCheck --check-prefix=CHECK-UAR %s 3; RUN: opt < %s -asan -asan-module -enable-new-pm=0 -asan-use-after-return=0 -S | FileCheck --check-prefix=CHECK-PLAIN %s 4; RUN: opt < %s -passes='asan-pipeline' -asan-use-after-return=0 -S | FileCheck --check-prefix=CHECK-PLAIN %s 5target datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128" 6target triple = "x86_64-unknown-linux-gnu" 7 8declare void @Foo(i8*) 9 10define void @Bar() uwtable sanitize_address { 11entry: 12; CHECK-PLAIN-LABEL: Bar 13; CHECK-PLAIN-NOT: label 14; CHECK-PLAIN: ret void 15 16; CHECK-UAR-LABEL: Bar 17; CHECK-UAR: load i32, i32* @__asan_option_detect_stack_use_after_return 18; CHECK-UAR: label 19; CHECK-UAR: call i64 @__asan_stack_malloc_4 20; CHECK-UAR: label 21; Poison red zones. 22; CHECK-UAR: store i64 -1007680412564983311 23; CHECK-UAR: store i64 72057598113936114 24; CHECK-UAR: store i32 -218959118 25; CHECK-UAR: store i64 -868082074056920316 26; CHECK-UAR: store i16 -3085 27; CHECK-UAR: call void @Foo 28; CHECK-UAR: call void @Foo 29; CHECK-UAR: call void @Foo 30; If LocalStackBase != OrigStackBase 31; CHECK-UAR: label 32; Then Block: poison the entire frame. 33 ; CHECK-UAR: call void @__asan_set_shadow_f5(i64 %{{[0-9]+}}, i64 128) 34 ; CHECK-UAR-NOT: store i64 35 ; CHECK-UAR: label 36; Else Block: no UAR frame. Only unpoison the redzones. 37 ; CHECK-UAR: store i64 0 38 ; CHECK-UAR: store i64 0 39 ; CHECK-UAR: store i32 0 40 ; CHECK-UAR: store i64 0 41 ; CHECK-UAR: store i16 0 42 ; CHECK-UAR-NOT: store 43 ; CHECK-UAR: label 44; Done, no more stores. 45; CHECK-UAR-NOT: store 46; CHECK-UAR: ret void 47 48 %x = alloca [20 x i8], align 16 49 %y = alloca [25 x i8], align 1 50 %z = alloca [500 x i8], align 1 51 %xx = getelementptr inbounds [20 x i8], [20 x i8]* %x, i64 0, i64 0 52 call void @Foo(i8* %xx) 53 %yy = getelementptr inbounds [25 x i8], [25 x i8]* %y, i64 0, i64 0 54 call void @Foo(i8* %yy) 55 %zz = getelementptr inbounds [500 x i8], [500 x i8]* %z, i64 0, i64 0 56 call void @Foo(i8* %zz) 57 ret void 58} 59 60 61