| ; RUN: opt < %s -dfsan -S | FileCheck %s |
| ; RUN: opt < %s -dfsan -dfsan-track-origins=1 -S | FileCheck %s --check-prefixes=CHECK,CHECK_ORIGIN |
| target 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" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| declare i32 @f(i32) |
| |
| ; CHECK-LABEL: @inner_callee.dfsan |
| define i32 @inner_callee(i32) { |
| %r = call i32 @f(i32 %0) |
| |
| ; COMM: Store here will be loaded in @outer_caller |
| ; CHECK: store{{.*}}__dfsan_retval_tls |
| ; CHECK_ORIGIN-NEXT: store{{.*}}__dfsan_retval_origin_tls |
| ; CHECK-NEXT: ret i32 |
| ret i32 %r |
| } |
| |
| ; CHECK-LABEL: @musttail_call.dfsan |
| define i32 @musttail_call(i32) { |
| ; CHECK: store{{.*}}__dfsan_arg_tls |
| ; CHECK-NEXT: musttail call i32 @inner_callee.dfsan |
| %r = musttail call i32 @inner_callee(i32 %0) |
| |
| ; For "musttail" calls we can not insert any shadow manipulating code between |
| ; call and the return instruction. And we don't need to, because everything is |
| ; taken care of in the callee. |
| ; This is similar to the function above, but the last load and store of |
| ; __dfsan_retval_tls can be elided because we know about the musttail. |
| |
| ; CHECK-NEXT: ret i32 |
| ret i32 %r |
| } |
| |
| ; CHECK-LABEL: @outer_caller.dfsan |
| define i32 @outer_caller() { |
| ; CHECK: call{{.*}}@musttail_call.dfsan |
| ; CHECK-NEXT: load{{.*}}__dfsan_retval_tls |
| ; CHECK_ORIGIN-NEXT: load{{.*}}__dfsan_retval_origin_tls |
| %r = call i32 @musttail_call(i32 0) |
| |
| ; CHECK-NEXT: store{{.*}}__dfsan_retval_tls |
| ; CHECK_ORIGIN-NEXT: store{{.*}}__dfsan_retval_origin_tls |
| ; CHECK-NEXT: ret i32 |
| ret i32 %r |
| } |
| |
| declare i32* @mismatching_callee(i32) |
| |
| ; CHECK-LABEL: define i8* @mismatching_musttail_call.dfsan |
| define i8* @mismatching_musttail_call(i32) { |
| %r = musttail call i32* @mismatching_callee(i32 %0) |
| ; CHECK: musttail call i32* @mismatching_callee.dfsan |
| ; COMM: No instrumentation between call and ret. |
| ; CHECK-NEXT: bitcast i32* {{.*}} to i8* |
| %c = bitcast i32* %r to i8* |
| ; CHECK-NEXT: ret i8* |
| ret i8* %c |
| } |