1; RUN: opt < %s -passes=dfsan -S | FileCheck %s 2; RUN: opt < %s -passes=dfsan -dfsan-track-origins=1 -S | FileCheck %s --check-prefixes=CHECK,CHECK_ORIGIN 3target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 4target triple = "x86_64-unknown-linux-gnu" 5 6declare i32 @f(i32) 7 8; CHECK-LABEL: @inner_callee.dfsan 9define i32 @inner_callee(i32) { 10 %r = call i32 @f(i32 %0) 11 12 ; COMM: Store here will be loaded in @outer_caller 13 ; CHECK: store{{.*}}__dfsan_retval_tls 14 ; CHECK_ORIGIN-NEXT: store{{.*}}__dfsan_retval_origin_tls 15 ; CHECK-NEXT: ret i32 16 ret i32 %r 17} 18 19; CHECK-LABEL: @musttail_call.dfsan 20define i32 @musttail_call(i32) { 21 ; CHECK: store{{.*}}__dfsan_arg_tls 22 ; CHECK-NEXT: musttail call i32 @inner_callee.dfsan 23 %r = musttail call i32 @inner_callee(i32 %0) 24 25 ; For "musttail" calls we can not insert any shadow manipulating code between 26 ; call and the return instruction. And we don't need to, because everything is 27 ; taken care of in the callee. 28 ; This is similar to the function above, but the last load and store of 29 ; __dfsan_retval_tls can be elided because we know about the musttail. 30 31 ; CHECK-NEXT: ret i32 32 ret i32 %r 33} 34 35; CHECK-LABEL: @outer_caller.dfsan 36define i32 @outer_caller() { 37 ; CHECK: call{{.*}}@musttail_call.dfsan 38 ; CHECK-NEXT: load{{.*}}__dfsan_retval_tls 39 ; CHECK_ORIGIN-NEXT: load{{.*}}__dfsan_retval_origin_tls 40 %r = call i32 @musttail_call(i32 0) 41 42 ; CHECK-NEXT: store{{.*}}__dfsan_retval_tls 43 ; CHECK_ORIGIN-NEXT: store{{.*}}__dfsan_retval_origin_tls 44 ; CHECK-NEXT: ret i32 45 ret i32 %r 46} 47 48declare ptr @mismatching_callee(i32) 49 50; CHECK-LABEL: define ptr @mismatching_musttail_call.dfsan 51define ptr @mismatching_musttail_call(i32) { 52 %r = musttail call ptr @mismatching_callee(i32 %0) 53 ; CHECK: musttail call ptr @mismatching_callee.dfsan 54 ; COMM: No instrumentation between call and ret. 55 ; CHECK-NEXT: ret ptr 56 ret ptr %r 57} 58