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| author | Alexey Samsonov <samsonov@google.com> | 2013-11-18 14:53:55 +0000 |
|---|---|---|
| committer | Alexey Samsonov <samsonov@google.com> | 2013-11-18 14:53:55 +0000 |
| commit | 64409ad8e3b360b84349042f14b57f87a5c0ca18 (patch) | |
| tree | 97fb4cff2b55902a988ecd4e4ee25797a3ce9889 /test/Instrumentation/AddressSanitizer/lifetime-uar.ll | |
| parent | 874081c8fae780138818ad3f706ae75cc7fa9fcd (diff) | |
| download | external_llvm-64409ad8e3b360b84349042f14b57f87a5c0ca18.zip external_llvm-64409ad8e3b360b84349042f14b57f87a5c0ca18.tar.gz external_llvm-64409ad8e3b360b84349042f14b57f87a5c0ca18.tar.bz2 | |
[ASan] Fix PR17867 - make sure ASan doesn't crash if use-after-scope and use-after-return are combined.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195014 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Instrumentation/AddressSanitizer/lifetime-uar.ll')
| -rw-r--r-- | test/Instrumentation/AddressSanitizer/lifetime-uar.ll | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/test/Instrumentation/AddressSanitizer/lifetime-uar.ll b/test/Instrumentation/AddressSanitizer/lifetime-uar.ll new file mode 100644 index 0000000..21eaf7f --- /dev/null +++ b/test/Instrumentation/AddressSanitizer/lifetime-uar.ll @@ -0,0 +1,33 @@ +; Test handling of llvm.lifetime intrinsics in UAR mode. +; RUN: opt < %s -asan -asan-use-after-return -asan-check-lifetime -S | FileCheck %s + +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" + +declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind +declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind + +define i32 @basic_test() sanitize_address { + ; CHECK-LABEL: define i32 @basic_test() + +entry: + %retval = alloca i32, align 4 + %c = alloca i8, align 1 + + call void @llvm.lifetime.start(i64 1, i8* %c) + ; Memory is unpoisoned at llvm.lifetime.start + ; CHECK: call void @__asan_unpoison_stack_memory(i64 %{{[^ ]+}}, i64 1) + + store i32 0, i32* %retval + store i8 0, i8* %c, align 1 + + call void @llvm.lifetime.end(i64 1, i8* %c) + ; Memory is poisoned at llvm.lifetime.end + ; CHECK: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 1) + + ; No need to unpoison memory at function exit in UAR mode. + ; CHECK-NOT: @__asan_unpoison_stack_memory + ; CHECK: ret void + + ret i32 0 +} + |