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Support for stubbing out extern functions
Signed-off-by: Felipe R. Monteiro <felisous@amazon.com>
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// Copyright Kani Contributors | ||
// SPDX-License-Identifier: Apache-2.0 OR MIT | ||
// | ||
// kani-flags: --harness harness --enable-unstable --enable-stubbing | ||
// | ||
//! Check support for stubbing out extern C functions. | ||
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#![feature(rustc_private)] | ||
extern crate libc; | ||
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use libc::c_char; | ||
use libc::c_int; | ||
use libc::c_longlong; | ||
use libc::size_t; | ||
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#[allow(dead_code)] // Avoid warning when using stubs. | ||
#[allow(unused_variables)] | ||
mod stubs { | ||
use super::*; | ||
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pub unsafe extern "C" fn strlen(cs: *const c_char) -> size_t { | ||
4 | ||
} | ||
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pub unsafe extern "C" fn sysconf(_input: c_int) -> c_longlong { | ||
10 | ||
} | ||
} | ||
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#[kani::proof] | ||
#[kani::stub(libc::strlen, stubs::strlen)] | ||
#[kani::stub(libc::sysconf, stubs::sysconf)] | ||
fn harness() { | ||
let str: Box<i8> = Box::new(4); | ||
let str_ptr: *const i8 = &*str; | ||
assert_eq!(unsafe { libc::strlen(str_ptr) }, 4); | ||
assert_eq!(unsafe { libc::sysconf(libc::_SC_PAGESIZE) } as usize, 10); | ||
} |