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a148c8c9ed
Summary:
Before this change the instrumented code before Ret instructions looked like:
<Unpoison Frame Redzones>
if (Frame != OriginalFrame) // I.e. Frame is fake
<Poison Complete Frame>
Now the instrumented code looks like:
if (Frame != OriginalFrame) // I.e. Frame is fake
<Poison Complete Frame>
else
<Unpoison Frame Redzones>
Reviewers: eugenis
Reviewed By: eugenis
CC: llvm-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D2458
llvm-svn: 197907
44 lines
1.2 KiB
LLVM
44 lines
1.2 KiB
LLVM
; RUN: opt < %s -asan -asan-use-after-return -S | FileCheck --check-prefix=CHECK-UAR %s
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; RUN: opt < %s -asan -S | FileCheck --check-prefix=CHECK-PLAIN %s
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target datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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declare void @Foo(i8*)
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define void @Bar() uwtable sanitize_address {
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entry:
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; CHECK-PLAIN-LABEL: Bar
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; CHECK-PLAIN-NOT: label
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; CHECK-PLAIN: ret void
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; CHECK-UAR-LABEL: Bar
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; CHECK-UAR: load i32* @__asan_option_detect_stack_use_after_return
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; CHECK-UAR: label
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; CHECK-UAR: call i64 @__asan_stack_malloc_1
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; CHECK-UAR: label
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; CHECK-UAR: call void @Foo
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; If LocalStackBase != OrigStackBase
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; CHECK-UAR: label
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; Then Block: poison the entire frame.
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; CHECK-UAR: store i64 -723401728380766731
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; CHECK-UAR: store i64 -723401728380766731
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; CHECK-UAR: store i8 0
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; CHECK-UAR-NOT: store
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; CHECK-UAR: label
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; Else Block: no UAR frame. Only unpoison the redzones.
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; CHECK-UAR: store i64 0
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; CHECK-UAR: store i32 0
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; CHECK-UAR-NOT: store
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; CHECK-UAR: label
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; Done, no more stores.
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; CHECK-UAR-NOT: store
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; CHECK-UAR: ret void
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%x = alloca [20 x i8], align 16
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%arraydecay = getelementptr inbounds [20 x i8]* %x, i64 0, i64 0
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call void @Foo(i8* %arraydecay)
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ret void
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}
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