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Auto merge of #34580 - eddyb:two-steps-forward-one-step-backwards, r=…
…nagisa Revert "Remove the return_address intrinsic." This reverts commit b30134d. Servo might want this merged if they don't merge servo/servo#11872 soon. cc @pnkfelix @jdm
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Original file line number | Diff line number | Diff line change |
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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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#![allow(warnings)] | ||
#![feature(intrinsics)] | ||
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extern "rust-intrinsic" { | ||
fn return_address() -> *const u8; | ||
} | ||
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unsafe fn f() { let _ = return_address(); } | ||
//~^ ERROR invalid use of `return_address` intrinsic: function does not use out pointer | ||
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unsafe fn g() -> isize { let _ = return_address(); 0 } | ||
//~^ ERROR invalid use of `return_address` intrinsic: function does not use out pointer | ||
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fn main() {} |
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// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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#![feature(intrinsics)] | ||
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use std::ptr; | ||
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struct Point { | ||
x: f32, | ||
y: f32, | ||
z: f32, | ||
} | ||
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extern "rust-intrinsic" { | ||
fn return_address() -> *const u8; | ||
} | ||
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fn f(result: &mut usize) -> Point { | ||
unsafe { | ||
*result = return_address() as usize; | ||
Point { | ||
x: 1.0, | ||
y: 2.0, | ||
z: 3.0, | ||
} | ||
} | ||
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} | ||
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fn main() { | ||
let mut intrinsic_reported_address = 0; | ||
let pt = f(&mut intrinsic_reported_address); | ||
let actual_address = &pt as *const Point as usize; | ||
assert_eq!(intrinsic_reported_address, actual_address); | ||
} |