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Commit 13126a20 authored by Per's avatar Per
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examples updated

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Cargo.lock
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View file @ 13126a20
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Cargo.toml
+ 1
− 0
View file @ 13126a20
...@@ -9,6 +9,7 @@ panic-halt = "0.2.0" ...@@ -9,6 +9,7 @@ panic-halt = "0.2.0"
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......
examples/klee_test.rs → examples/klee_hybrid_test.rs
+ 3
− 0
View file @ 13126a20
// example to show conditional compilation of hybrid applications
// compiling both for klee analysis and just as bare metal
//
#![no_std] #![no_std]
#![no_main] #![no_main]
......
examples/klee_only_test.rs 0 → 100644
+ 24
− 0
View file @ 13126a20
// example that shows different types of path termination
// and their effect to KLEE test case generation
#![no_std]
#![no_main]
use klee_sys::{klee_abort, klee_assert, klee_assert_eq, klee_make_symbolic};
use panic_klee as _;
#[no_mangle]
fn main() {
let mut a = 0;
klee_make_symbolic!(&mut a, "a");
match a {
0 => klee_abort!(),
1 => klee_abort!(),
2 => panic!(),
3 => panic!("3"), // just one instance of panic! will be spotted
4 => klee_assert!(false),
5 => klee_assert_eq!(false, true),
6 => klee_assert_eq!(false, true),
_ => (),
};
panic!("at end"); // just one instane of panic! will be spotted
}
examples/register_test.rs 0 → 100644
+ 105
− 0
View file @ 13126a20
// showcase volatile register
// This is the underlying abstraction to all register accesses using the
// embedded Rust ecosystem.
//
// When analyzed by KLEE, we make the return value symbolic, thus each access
// givs a new unique symbol. Even if we write a value to it, the next read
// will still be treated as a new symbol. That might be overly pessimistic
// but is a safe approximation for the worst case behavior of the hardware.
//
// > cargo klee --bin register --release
// ...
// KLEE: ERROR: /home/pln/.cargo/registry/src/github.com-1ecc6299db9ec823/panic-abort-0.3.2/src/lib.rs:49: abort failure
// KLEE: NOTE: now ignoring this error at this location
// KLEE: done: total instructions = 33
// KLEE: done: completed paths = 3
// KLEE: done: generated tests = 3
//
// > ls target/release/deps/klee-last/
// assembly.ll info messages.txt run.istats run.stats test000001.ktest test000002.ktest test000003.abort.err test000003.kquery test000003.ktest warnings.txt
//
// We see that KLEE spoted the test3 hits unreachable (and thus panics)
//
// Let's look at the test cases separately:
//
// test1 passed:
// ktest-tool target/release/deps/klee-last/test000001.ktest
// ktest file : 'target/release/deps/klee-last/test000001.ktest'
// args : ['/home/pln/rust/cargo-klee/klee-examples/target/release/deps/register-16afa0ec4812d3e4.ll']
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// object 0: uint: 0
// object 0: text: ....
// If the first read of the register is not 1 then we are ok.
//
// The second test also passed.
// ktest-tool target/release/deps/klee-last/test000002.ktest
// ktest file : 'target/release/deps/klee-last/test000002.ktest'
// args : ['/home/pln/rust/cargo-klee/klee-examples/target/release/deps/register-16afa0ec4812d3e4.ll']
// num objects: 2
// object 0: name: 'vcell'
// object 0: size: 4
// object 0: data: b'\x01\x00\x00\x00'
// object 0: hex : 0x01000000
// object 0: int : 1
// object 0: uint: 1
// object 0: text: ....
// object 1: name: 'vcell'
// object 1: size: 4
// object 1: data: b'\x00\x00\x00\x00'
// object 1: hex : 0x00000000
// object 1: int : 0
// object 1: uint: 0
// object 1: text: ....
// Here we are saved by the second reading of the register NOT giving
// returning 2.
//
// The third test gives the error.
// ktest-tool target/release/deps/klee-last/test000003.ktest
// ktest file : 'target/release/deps/klee-last/test000003.ktest'
// args : ['/home/pln/rust/cargo-klee/klee-examples/target/release/deps/register-16afa0ec4812d3e4.ll']
// num objects: 2
// object 0: name: 'vcell'
// object 0: size: 4
// object 0: data: b'\x01\x00\x00\x00'
// object 0: hex : 0x01000000
// object 0: int : 1
// object 0: uint: 1
// object 0: text: ....
// object 1: name: 'vcell'
// object 1: size: 4
// object 1: data: b'\x02\x00\x00\x00'
// object 1: hex : 0x02000000
// object 1: int : 2
// object 1: uint: 2
// object 1: text: ....
//
// The first read gives 1, the second 2, and we hit unreacable.
#![no_std]
#![no_main]
use panic_klee as _;
use volatile_register::RW;
#[no_mangle]
fn main() {
// we emulate a read/write hardware register (rw)
let rw: RW<u32> = unsafe { core::mem::MaybeUninit::uninit().assume_init() };
// reading will render a symbolic value of type u32
if rw.read() == 1 {
// we emulate a write to the hardware register
unsafe { rw.write(0) };
// this read is still treated as a new symbolic value of type u32
if rw.read() == 2 {
unreachable!();
}
}
}
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