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</pre><pre class="rust ">
<span class="comment">// Copyright 2013 The Rust Project Developers. See the COPYRIGHT</span>
<span class="comment">// file at the top-level directory of this distribution and at</span>
<span class="comment">// http://rust-lang.org/COPYRIGHT.</span>
<span class="comment">//</span>
<span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
<span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span>
<span class="comment">// option. This file may not be copied, modified, or distributed</span>
<span class="comment">// except according to those terms.</span>
<span class="kw">use</span> <span class="ident">env</span>;
<span class="kw">use</span> <span class="ident">fmt</span>;
<span class="kw">use</span> <span class="ident">io</span>::<span class="ident">prelude</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">sync</span>::<span class="ident">atomic</span>::{<span class="self">self</span>, <span class="ident">Ordering</span>};
<span class="kw">use</span> <span class="ident">sys</span>::<span class="ident">stdio</span>::<span class="ident">Stderr</span>;
<span class="kw">use</span> <span class="ident">thread</span>;
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">min_stack</span>() <span class="op">-></span> <span class="ident">usize</span> {
<span class="kw">static</span> <span class="ident">MIN</span>: <span class="ident">atomic</span>::<span class="ident">AtomicUsize</span> <span class="op">=</span> <span class="ident">atomic</span>::<span class="ident">AtomicUsize</span>::<span class="ident">new</span>(<span class="number">0</span>);
<span class="kw">match</span> <span class="ident">MIN</span>.<span class="ident">load</span>(<span class="ident">Ordering</span>::<span class="ident">SeqCst</span>) {
<span class="number">0</span> <span class="op">=></span> {}
<span class="ident">n</span> <span class="op">=></span> <span class="kw">return</span> <span class="ident">n</span> <span class="op">-</span> <span class="number">1</span>,
}
<span class="kw">let</span> <span class="ident">amt</span> <span class="op">=</span> <span class="ident">env</span>::<span class="ident">var</span>(<span class="string">"RUST_MIN_STACK"</span>).<span class="ident">ok</span>().<span class="ident">and_then</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="ident">s</span>.<span class="ident">parse</span>().<span class="ident">ok</span>());
<span class="kw">let</span> <span class="ident">amt</span> <span class="op">=</span> <span class="ident">amt</span>.<span class="ident">unwrap_or</span>(<span class="number">2</span> <span class="op">*</span> <span class="number">1024</span> <span class="op">*</span> <span class="number">1024</span>);
<span class="comment">// 0 is our sentinel value, so ensure that we'll never see 0 after</span>
<span class="comment">// initialization has run</span>
<span class="ident">MIN</span>.<span class="ident">store</span>(<span class="ident">amt</span> <span class="op">+</span> <span class="number">1</span>, <span class="ident">Ordering</span>::<span class="ident">SeqCst</span>);
<span class="ident">amt</span>
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">dumb_print</span>(<span class="ident">args</span>: <span class="ident">fmt</span>::<span class="ident">Arguments</span>) {
<span class="kw">let</span> _ <span class="op">=</span> <span class="ident">Stderr</span>::<span class="ident">new</span>().<span class="ident">map</span>(<span class="op">|</span><span class="kw-2">mut</span> <span class="ident">stderr</span><span class="op">|</span> <span class="ident">stderr</span>.<span class="ident">write_fmt</span>(<span class="ident">args</span>));
}
<span class="comment">// Other platforms should use the appropriate platform-specific mechanism for</span>
<span class="comment">// aborting the process. If no platform-specific mechanism is available,</span>
<span class="comment">// ::intrinsics::abort() may be used instead. The above implementations cover</span>
<span class="comment">// all targets currently supported by libstd.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">abort</span>(<span class="ident">args</span>: <span class="ident">fmt</span>::<span class="ident">Arguments</span>) <span class="op">-></span> <span class="op">!</span> {
<span class="ident">dumb_print</span>(<span class="macro">format_args</span><span class="macro">!</span>(<span class="string">"fatal runtime error: {}\n"</span>, <span class="ident">args</span>));
<span class="kw">unsafe</span> { ::<span class="ident">sys</span>::<span class="ident">abort_internal</span>(); }
}
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">dead_code</span>)]</span> <span class="comment">// stack overflow detection not enabled on all platforms</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">report_overflow</span>() {
<span class="ident">dumb_print</span>(<span class="macro">format_args</span><span class="macro">!</span>(<span class="string">"\nthread '{}' has overflowed its stack\n"</span>,
<span class="ident">thread</span>::<span class="ident">current</span>().<span class="ident">name</span>().<span class="ident">unwrap_or</span>(<span class="string">"<unknown>"</span>)));
}
</pre>
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