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| author | Cristian Cadar <c.cadar@imperial.ac.uk> | 2017-08-04 23:15:29 +0100 |
|---|---|---|
| committer | Cristian Cadar <c.cadar@imperial.ac.uk> | 2017-08-07 11:06:34 +0100 |
| commit | 75d0c41e361583cf922b6082b1cb13eee2811e33 (patch) | |
| tree | 35f4cedcc4c835f0499ce333d36f810965372a5d /test | |
| parent | a4ed54c2b8228a30785c11d7542427a1bd1f7292 (diff) | |
| download | klee-75d0c41e361583cf922b6082b1cb13eee2811e33.tar.gz | |
Added checks for div/mod by zero and overshifts in constant expressions. Such div/mod by zero expressions would previously crash KLEE. Added two test cases, one for div/mod by zero, the other for overshift. This fixes the bug reported in #268.
Diffstat (limited to 'test')
| -rw-r--r-- | test/Feature/ConstExprWithDivZero.ll | 18 | ||||
| -rw-r--r-- | test/Feature/ConstExprWithOvershift.ll | 16 |
2 files changed, 34 insertions, 0 deletions
diff --git a/test/Feature/ConstExprWithDivZero.ll b/test/Feature/ConstExprWithDivZero.ll new file mode 100644 index 00000000..f430dad9 --- /dev/null +++ b/test/Feature/ConstExprWithDivZero.ll @@ -0,0 +1,18 @@ +; REQUIRES: llvm-3.4 +; RUN: llvm-as %s -f -o %t.bc +; RUN: rm -rf %t.klee-out +; RUN: not %klee --output-dir=%t.klee-out %t.bc 2> %t.log +; RUN: FileCheck --input-file %t.log %s + +; See https://github.com/klee/klee/issues/268 + +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-pc-linux-gnu" + +@a = internal global i32 0, align 4 +@b = internal global [1 x i32] [i32 1], align 4 + +define i32 @main() { +; CHECK: Division/modulo by zero during constant folding + ret i32 trunc (i64 sdiv (i64 2036854775807, i64 sext (i32 select (i1 icmp eq (i32* getelementptr inbounds ([1 x i32]* @b, i64 0, i64 0), i32* @a), i32 1, i32 0) to i64)) to i32) +} diff --git a/test/Feature/ConstExprWithOvershift.ll b/test/Feature/ConstExprWithOvershift.ll new file mode 100644 index 00000000..7d4a1284 --- /dev/null +++ b/test/Feature/ConstExprWithOvershift.ll @@ -0,0 +1,16 @@ +; REQUIRES: llvm-3.4 +; RUN: llvm-as %s -f -o %t.bc +; RUN: rm -rf %t.klee-out +; RUN: not %klee --output-dir=%t.klee-out %t.bc 2> %t.log +; RUN: FileCheck --input-file %t.log %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" +target triple = "x86_64-pc-linux-gnu" + +@a = internal global i32 0, align 4 +@b = internal global [1 x i32] [i32 1], align 4 + +define i32 @main() { +; CHECK: Overshift during constant folding + ret i32 ashr (i32 zext (i1 icmp ne (i32* getelementptr inbounds ([1 x i32]* @b, i64 0, i64 0), i32* @a) to i32), i32 trunc (i64 add (i64 zext (i1 icmp ne (i32* getelementptr inbounds ([1 x i32]* @b, i64 0, i64 0), i32* @a) to i64), i64 31) to i32)) +} |