8f55c15bfe
There are major questions remaining about the reentrancy that this allows. It doesn't have any users on github outside of a single project that uses it in a panic=abort project to show backtraces. It can still be emulated through #[alloc_error_handler] or set_alloc_error_hook depending on if you use the standard library or not. And finally it makes it harder to do various improvements to the allocator shim.
26 lines
722 B
Rust
26 lines
722 B
Rust
//! Test that out-of-memory conditions trigger catchable panics with `set_alloc_error_hook`.
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//@ run-pass
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//@ needs-unwind
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//@ only-linux
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//@ ignore-backends: gcc
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#![feature(alloc_error_hook)]
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use std::hint::black_box;
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use std::mem::forget;
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use std::panic::catch_unwind;
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fn main() {
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std::alloc::set_alloc_error_hook(|_| panic!());
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let panic = catch_unwind(|| {
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// This is guaranteed to exceed even the size of the address space
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for _ in 0..16 {
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// Truncates to a suitable value for both 32-bit and 64-bit targets.
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let alloc_size = 0x1000_0000_1000_0000u64 as usize;
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forget(black_box(vec![0u8; alloc_size]));
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}
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});
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assert!(panic.is_err());
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}
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