derek.holloway
7502bf64a4
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58 lines
2.0 KiB
LLVM
58 lines
2.0 KiB
LLVM
; RUN: opt < %s -passes=dfsan -S | FileCheck %s
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; RUN: opt < %s -passes=dfsan -dfsan-track-origins=1 -S | FileCheck %s --check-prefixes=CHECK,CHECK_ORIGIN
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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"
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target triple = "x86_64-unknown-linux-gnu"
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declare i32 @f(i32)
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; CHECK-LABEL: @inner_callee.dfsan
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define i32 @inner_callee(i32) {
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%r = call i32 @f(i32 %0)
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; COMM: Store here will be loaded in @outer_caller
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; CHECK: store{{.*}}__dfsan_retval_tls
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; CHECK_ORIGIN-NEXT: store{{.*}}__dfsan_retval_origin_tls
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; CHECK-NEXT: ret i32
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ret i32 %r
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}
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; CHECK-LABEL: @musttail_call.dfsan
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define i32 @musttail_call(i32) {
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; CHECK: store{{.*}}__dfsan_arg_tls
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; CHECK-NEXT: musttail call i32 @inner_callee.dfsan
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%r = musttail call i32 @inner_callee(i32 %0)
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; For "musttail" calls we can not insert any shadow manipulating code between
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; call and the return instruction. And we don't need to, because everything is
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; taken care of in the callee.
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; This is similar to the function above, but the last load and store of
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; __dfsan_retval_tls can be elided because we know about the musttail.
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; CHECK-NEXT: ret i32
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ret i32 %r
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}
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; CHECK-LABEL: @outer_caller.dfsan
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define i32 @outer_caller() {
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; CHECK: call{{.*}}@musttail_call.dfsan
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; CHECK-NEXT: load{{.*}}__dfsan_retval_tls
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; CHECK_ORIGIN-NEXT: load{{.*}}__dfsan_retval_origin_tls
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%r = call i32 @musttail_call(i32 0)
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; CHECK-NEXT: store{{.*}}__dfsan_retval_tls
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; CHECK_ORIGIN-NEXT: store{{.*}}__dfsan_retval_origin_tls
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; CHECK-NEXT: ret i32
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ret i32 %r
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}
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declare ptr @mismatching_callee(i32)
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; CHECK-LABEL: define ptr @mismatching_musttail_call.dfsan
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define ptr @mismatching_musttail_call(i32) {
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%r = musttail call ptr @mismatching_callee(i32 %0)
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; CHECK: musttail call ptr @mismatching_callee.dfsan
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; COMM: No instrumentation between call and ret.
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; CHECK-NEXT: ret ptr
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ret ptr %r
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}
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