<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `lib/runtime-core/src/codegen.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>codegen.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="https://wasmer.io/static/icons/favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../wasmer_runtime_core/index.html'><div class='logo-container'><img src='https://avatars3.githubusercontent.com/u/44205449?s=200&v=4' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><div class="example-wrap"><pre class="rust ">
<span class="kw">use</span> <span class="kw">crate</span>::{
<span class="ident">backend</span>::<span class="ident">RunnableModule</span>,
<span class="ident">backend</span>::{<span class="ident">Backend</span>, <span class="ident">CacheGen</span>, <span class="ident">Compiler</span>, <span class="ident">CompilerConfig</span>, <span class="ident">Features</span>, <span class="ident">Token</span>},
<span class="ident">cache</span>::{<span class="ident">Artifact</span>, <span class="ident">Error</span> <span class="kw">as</span> <span class="ident">CacheError</span>},
<span class="ident">error</span>::{<span class="ident">CompileError</span>, <span class="ident">CompileResult</span>},
<span class="ident">module</span>::{<span class="ident">ModuleInfo</span>, <span class="ident">ModuleInner</span>},
<span class="ident">structures</span>::<span class="ident">Map</span>,
<span class="ident">types</span>::{<span class="ident">FuncIndex</span>, <span class="ident">FuncSig</span>, <span class="ident">SigIndex</span>},
};
<span class="kw">use</span> <span class="ident">smallvec</span>::<span class="ident">SmallVec</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">any</span>::<span class="ident">Any</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashMap</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>::<span class="ident">Debug</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">marker</span>::<span class="ident">PhantomData</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::{<span class="ident">Arc</span>, <span class="ident">RwLock</span>};
<span class="kw">use</span> <span class="ident">wasmparser</span>::{<span class="self">self</span>, <span class="ident">WasmDecoder</span>};
<span class="kw">use</span> <span class="ident">wasmparser</span>::{<span class="ident">Operator</span>, <span class="ident">Type</span> <span class="kw">as</span> <span class="ident">WpType</span>};
<span class="kw">pub</span> <span class="kw">type</span> <span class="ident">BreakpointHandler</span> <span class="op">=</span>
<span class="ident">Box</span><span class="op"><</span><span class="kw">dyn</span> <span class="ident">Fn</span>(<span class="ident">BreakpointInfo</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">Box</span><span class="op"><</span><span class="kw">dyn</span> <span class="ident">Any</span><span class="op">></span><span class="op">></span> <span class="op">+</span> <span class="ident">Send</span> <span class="op">+</span> <span class="ident">Sync</span> <span class="op">+</span> <span class="lifetime">'static</span><span class="op">></span>;
<span class="kw">pub</span> <span class="kw">type</span> <span class="ident">BreakpointMap</span> <span class="op">=</span> <span class="ident">Arc</span><span class="op"><</span><span class="ident">HashMap</span><span class="op"><</span><span class="ident">usize</span>, <span class="ident">BreakpointHandler</span><span class="op">></span><span class="op">></span>;
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Event</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span> {
<span class="ident">Internal</span>(<span class="ident">InternalEvent</span>),
<span class="ident">Wasm</span>(<span class="kw-2">&</span><span class="lifetime">'b</span> <span class="ident">Operator</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>),
<span class="ident">WasmOwned</span>(<span class="ident">Operator</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>),
}
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">InternalEvent</span> {
<span class="ident">FunctionBegin</span>(<span class="ident">u32</span>),
<span class="ident">FunctionEnd</span>,
<span class="ident">Breakpoint</span>(<span class="ident">BreakpointHandler</span>),
<span class="ident">SetInternal</span>(<span class="ident">u32</span>),
<span class="ident">GetInternal</span>(<span class="ident">u32</span>),
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">InternalEvent</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-</span><span class="op">></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="ident">InternalEvent</span>::<span class="ident">FunctionBegin</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">></span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"FunctionBegin"</span>),
<span class="ident">InternalEvent</span>::<span class="ident">FunctionEnd</span> <span class="op">=</span><span class="op">></span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"FunctionEnd"</span>),
<span class="ident">InternalEvent</span>::<span class="ident">Breakpoint</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">></span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Breakpoint"</span>),
<span class="ident">InternalEvent</span>::<span class="ident">SetInternal</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">></span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"SetInternal"</span>),
<span class="ident">InternalEvent</span>::<span class="ident">GetInternal</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">></span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"GetInternal"</span>),
}
}
}
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">BreakpointInfo</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="kw">pub</span> <span class="ident">fault</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw">dyn</span> <span class="ident">Any</span><span class="op">></span>,
}
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">ModuleCodeGenerator</span><span class="op"><</span><span class="ident">FCG</span>: <span class="ident">FunctionCodeGenerator</span><span class="op"><</span><span class="ident">E</span><span class="op">></span>, <span class="ident">RM</span>: <span class="ident">RunnableModule</span>, <span class="ident">E</span>: <span class="ident">Debug</span><span class="op">></span> {
<span class="doccomment">/// Creates a new module code generator.</span>
<span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-</span><span class="op">></span> <span class="self">Self</span>;
<span class="doccomment">/// Returns the backend id associated with this MCG.</span>
<span class="kw">fn</span> <span class="ident">backend_id</span>() <span class="op">-</span><span class="op">></span> <span class="ident">Backend</span>;
<span class="doccomment">/// Feeds the compiler config.</span>
<span class="kw">fn</span> <span class="ident">feed_compiler_config</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_config</span>: <span class="kw-2">&</span><span class="ident">CompilerConfig</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">E</span><span class="op">></span> {
<span class="prelude-val">Ok</span>(())
}
<span class="doccomment">/// Adds an import function.</span>
<span class="kw">fn</span> <span class="ident">feed_import_function</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">E</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">feed_signatures</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">signatures</span>: <span class="ident">Map</span><span class="op"><</span><span class="ident">SigIndex</span>, <span class="ident">FuncSig</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">E</span><span class="op">></span>;
<span class="doccomment">/// Sets function signatures.</span>
<span class="kw">fn</span> <span class="ident">feed_function_signatures</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">assoc</span>: <span class="ident">Map</span><span class="op"><</span><span class="ident">FuncIndex</span>, <span class="ident">SigIndex</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">E</span><span class="op">></span>;
<span class="doccomment">/// Checks the precondition for a module.</span>
<span class="kw">fn</span> <span class="ident">check_precondition</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">module_info</span>: <span class="kw-2">&</span><span class="ident">ModuleInfo</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">E</span><span class="op">></span>;
<span class="doccomment">/// Creates a new function and returns the function-scope code generator for it.</span>
<span class="kw">fn</span> <span class="ident">next_function</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">module_info</span>: <span class="ident">Arc</span><span class="op"><</span><span class="ident">RwLock</span><span class="op"><</span><span class="ident">ModuleInfo</span><span class="op">></span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">FCG</span>, <span class="ident">E</span><span class="op">></span>;
<span class="doccomment">/// Finalizes this module.</span>
<span class="kw">fn</span> <span class="ident">finalize</span>(<span class="self">self</span>, <span class="ident">module_info</span>: <span class="kw-2">&</span><span class="ident">ModuleInfo</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(<span class="ident">RM</span>, <span class="ident">Box</span><span class="op"><</span><span class="kw">dyn</span> <span class="ident">CacheGen</span><span class="op">></span>), <span class="ident">E</span><span class="op">></span>;
<span class="doccomment">/// Creates a module from cache.</span>
<span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">from_cache</span>(<span class="ident">cache</span>: <span class="ident">Artifact</span>, <span class="kw">_</span>: <span class="ident">Token</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">ModuleInner</span>, <span class="ident">CacheError</span><span class="op">></span>;
}
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">StreamingCompiler</span><span class="op"><</span>
<span class="ident">MCG</span>: <span class="ident">ModuleCodeGenerator</span><span class="op"><</span><span class="ident">FCG</span>, <span class="ident">RM</span>, <span class="ident">E</span><span class="op">></span>,
<span class="ident">FCG</span>: <span class="ident">FunctionCodeGenerator</span><span class="op"><</span><span class="ident">E</span><span class="op">></span>,
<span class="ident">RM</span>: <span class="ident">RunnableModule</span> <span class="op">+</span> <span class="lifetime">'static</span>,
<span class="ident">E</span>: <span class="ident">Debug</span>,
<span class="ident">CGEN</span>: <span class="ident">Fn</span>() <span class="op">-</span><span class="op">></span> <span class="ident">MiddlewareChain</span>,
<span class="op">></span> {
<span class="ident">middleware_chain_generator</span>: <span class="ident">CGEN</span>,
<span class="ident">_phantom_mcg</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">MCG</span><span class="op">></span>,
<span class="ident">_phantom_fcg</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">FCG</span><span class="op">></span>,
<span class="ident">_phantom_rm</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">RM</span><span class="op">></span>,
<span class="ident">_phantom_e</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">E</span><span class="op">></span>,
}
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SimpleStreamingCompilerGen</span><span class="op"><</span>
<span class="ident">MCG</span>: <span class="ident">ModuleCodeGenerator</span><span class="op"><</span><span class="ident">FCG</span>, <span class="ident">RM</span>, <span class="ident">E</span><span class="op">></span>,
<span class="ident">FCG</span>: <span class="ident">FunctionCodeGenerator</span><span class="op"><</span><span class="ident">E</span><span class="op">></span>,
<span class="ident">RM</span>: <span class="ident">RunnableModule</span> <span class="op">+</span> <span class="lifetime">'static</span>,
<span class="ident">E</span>: <span class="ident">Debug</span>,
<span class="op">></span> {
<span class="ident">_phantom_mcg</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">MCG</span><span class="op">></span>,
<span class="ident">_phantom_fcg</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">FCG</span><span class="op">></span>,
<span class="ident">_phantom_rm</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">RM</span><span class="op">></span>,
<span class="ident">_phantom_e</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">E</span><span class="op">></span>,
}
<span class="kw">impl</span><span class="op"><</span>
<span class="ident">MCG</span>: <span class="ident">ModuleCodeGenerator</span><span class="op"><</span><span class="ident">FCG</span>, <span class="ident">RM</span>, <span class="ident">E</span><span class="op">></span>,
<span class="ident">FCG</span>: <span class="ident">FunctionCodeGenerator</span><span class="op"><</span><span class="ident">E</span><span class="op">></span>,
<span class="ident">RM</span>: <span class="ident">RunnableModule</span> <span class="op">+</span> <span class="lifetime">'static</span>,
<span class="ident">E</span>: <span class="ident">Debug</span>,
<span class="op">></span> <span class="ident">SimpleStreamingCompilerGen</span><span class="op"><</span><span class="ident">MCG</span>, <span class="ident">FCG</span>, <span class="ident">RM</span>, <span class="ident">E</span><span class="op">></span>
{
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-</span><span class="op">></span> <span class="ident">StreamingCompiler</span><span class="op"><</span><span class="ident">MCG</span>, <span class="ident">FCG</span>, <span class="ident">RM</span>, <span class="ident">E</span>, <span class="kw">impl</span> <span class="ident">Fn</span>() <span class="op">-</span><span class="op">></span> <span class="ident">MiddlewareChain</span><span class="op">></span> {
<span class="ident">StreamingCompiler</span>::<span class="ident">new</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">MiddlewareChain</span>::<span class="ident">new</span>())
}
}
<span class="kw">impl</span><span class="op"><</span>
<span class="ident">MCG</span>: <span class="ident">ModuleCodeGenerator</span><span class="op"><</span><span class="ident">FCG</span>, <span class="ident">RM</span>, <span class="ident">E</span><span class="op">></span>,
<span class="ident">FCG</span>: <span class="ident">FunctionCodeGenerator</span><span class="op"><</span><span class="ident">E</span><span class="op">></span>,
<span class="ident">RM</span>: <span class="ident">RunnableModule</span> <span class="op">+</span> <span class="lifetime">'static</span>,
<span class="ident">E</span>: <span class="ident">Debug</span>,
<span class="ident">CGEN</span>: <span class="ident">Fn</span>() <span class="op">-</span><span class="op">></span> <span class="ident">MiddlewareChain</span>,
<span class="op">></span> <span class="ident">StreamingCompiler</span><span class="op"><</span><span class="ident">MCG</span>, <span class="ident">FCG</span>, <span class="ident">RM</span>, <span class="ident">E</span>, <span class="ident">CGEN</span><span class="op">></span>
{
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">chain_gen</span>: <span class="ident">CGEN</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="self">Self</span> {
<span class="ident">middleware_chain_generator</span>: <span class="ident">chain_gen</span>,
<span class="ident">_phantom_mcg</span>: <span class="ident">PhantomData</span>,
<span class="ident">_phantom_fcg</span>: <span class="ident">PhantomData</span>,
<span class="ident">_phantom_rm</span>: <span class="ident">PhantomData</span>,
<span class="ident">_phantom_e</span>: <span class="ident">PhantomData</span>,
}
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">validating_parser_config</span>(<span class="ident">features</span>: <span class="kw-2">&</span><span class="ident">Features</span>) <span class="op">-</span><span class="op">></span> <span class="ident">wasmparser</span>::<span class="ident">ValidatingParserConfig</span> {
<span class="ident">wasmparser</span>::<span class="ident">ValidatingParserConfig</span> {
<span class="ident">operator_config</span>: <span class="ident">wasmparser</span>::<span class="ident">OperatorValidatorConfig</span> {
<span class="ident">enable_threads</span>: <span class="ident">features</span>.<span class="ident">threads</span>,
<span class="ident">enable_reference_types</span>: <span class="bool-val">false</span>,
<span class="ident">enable_simd</span>: <span class="ident">features</span>.<span class="ident">simd</span>,
<span class="ident">enable_bulk_memory</span>: <span class="bool-val">false</span>,
<span class="ident">enable_multi_value</span>: <span class="bool-val">false</span>,
},
<span class="ident">mutable_global_imports</span>: <span class="bool-val">true</span>,
}
}
<span class="kw">fn</span> <span class="ident">validate_with_features</span>(<span class="ident">bytes</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>], <span class="ident">features</span>: <span class="kw-2">&</span><span class="ident">Features</span>) <span class="op">-</span><span class="op">></span> <span class="ident">CompileResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">parser</span> <span class="op">=</span>
<span class="ident">wasmparser</span>::<span class="ident">ValidatingParser</span>::<span class="ident">new</span>(<span class="ident">bytes</span>, <span class="prelude-val">Some</span>(<span class="ident">validating_parser_config</span>(<span class="ident">features</span>)));
<span class="kw">loop</span> {
<span class="kw">let</span> <span class="ident">state</span> <span class="op">=</span> <span class="ident">parser</span>.<span class="ident">read</span>();
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">state</span> {
<span class="ident">wasmparser</span>::<span class="ident">ParserState</span>::<span class="ident">EndWasm</span> <span class="op">=</span><span class="op">></span> <span class="kw">break</span> <span class="prelude-val">Ok</span>(()),
<span class="ident">wasmparser</span>::<span class="ident">ParserState</span>::<span class="ident">Error</span>(<span class="ident">err</span>) <span class="op">=</span><span class="op">></span> <span class="prelude-val">Err</span>(<span class="ident">CompileError</span>::<span class="ident">ValidationError</span> {
<span class="ident">msg</span>: <span class="ident">err</span>.<span class="ident">message</span>.<span class="ident">to_string</span>(),
})<span class="question-mark">?</span>,
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> {}
}
}
}
<span class="kw">impl</span><span class="op"><</span>
<span class="ident">MCG</span>: <span class="ident">ModuleCodeGenerator</span><span class="op"><</span><span class="ident">FCG</span>, <span class="ident">RM</span>, <span class="ident">E</span><span class="op">></span>,
<span class="ident">FCG</span>: <span class="ident">FunctionCodeGenerator</span><span class="op"><</span><span class="ident">E</span><span class="op">></span>,
<span class="ident">RM</span>: <span class="ident">RunnableModule</span> <span class="op">+</span> <span class="lifetime">'static</span>,
<span class="ident">E</span>: <span class="ident">Debug</span>,
<span class="ident">CGEN</span>: <span class="ident">Fn</span>() <span class="op">-</span><span class="op">></span> <span class="ident">MiddlewareChain</span>,
<span class="op">></span> <span class="ident">Compiler</span> <span class="kw">for</span> <span class="ident">StreamingCompiler</span><span class="op"><</span><span class="ident">MCG</span>, <span class="ident">FCG</span>, <span class="ident">RM</span>, <span class="ident">E</span>, <span class="ident">CGEN</span><span class="op">></span>
{
<span class="kw">fn</span> <span class="ident">compile</span>(
<span class="kw-2">&</span><span class="self">self</span>,
<span class="ident">wasm</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>],
<span class="ident">compiler_config</span>: <span class="ident">CompilerConfig</span>,
<span class="kw">_</span>: <span class="ident">Token</span>,
) <span class="op">-</span><span class="op">></span> <span class="ident">CompileResult</span><span class="op"><</span><span class="ident">ModuleInner</span><span class="op">></span> {
<span class="kw">if</span> <span class="ident">requires_pre_validation</span>(<span class="ident">MCG</span>::<span class="ident">backend_id</span>()) {
<span class="ident">validate_with_features</span>(<span class="ident">wasm</span>, <span class="kw-2">&</span><span class="ident">compiler_config</span>.<span class="ident">features</span>)<span class="question-mark">?</span>;
}
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">mcg</span> <span class="op">=</span> <span class="ident">MCG</span>::<span class="ident">new</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">chain</span> <span class="op">=</span> (<span class="self">self</span>.<span class="ident">middleware_chain_generator</span>)();
<span class="kw">let</span> <span class="ident">info</span> <span class="op">=</span> <span class="kw">crate</span>::<span class="ident">parse</span>::<span class="ident">read_module</span>(
<span class="ident">wasm</span>,
<span class="ident">MCG</span>::<span class="ident">backend_id</span>(),
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">mcg</span>,
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">chain</span>,
<span class="kw-2">&</span><span class="ident">compiler_config</span>,
)<span class="question-mark">?</span>;
<span class="kw">let</span> (<span class="ident">exec_context</span>, <span class="ident">cache_gen</span>) <span class="op">=</span>
<span class="ident">mcg</span>.<span class="ident">finalize</span>(<span class="kw-2">&</span><span class="ident">info</span>.<span class="ident">read</span>().<span class="ident">unwrap</span>())
.<span class="ident">map_err</span>(<span class="op">|</span><span class="ident">x</span><span class="op">|</span> <span class="ident">CompileError</span>::<span class="ident">InternalError</span> {
<span class="ident">msg</span>: <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">x</span>),
})<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(<span class="ident">ModuleInner</span> {
<span class="ident">cache_gen</span>,
<span class="ident">runnable_module</span>: <span class="ident">Box</span>::<span class="ident">new</span>(<span class="ident">exec_context</span>),
<span class="ident">info</span>: <span class="ident">Arc</span>::<span class="ident">try_unwrap</span>(<span class="ident">info</span>).<span class="ident">unwrap</span>().<span class="ident">into_inner</span>().<span class="ident">unwrap</span>(),
})
}
<span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">from_cache</span>(
<span class="kw-2">&</span><span class="self">self</span>,
<span class="ident">artifact</span>: <span class="ident">Artifact</span>,
<span class="ident">token</span>: <span class="ident">Token</span>,
) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">ModuleInner</span>, <span class="ident">CacheError</span><span class="op">></span> {
<span class="ident">MCG</span>::<span class="ident">from_cache</span>(<span class="ident">artifact</span>, <span class="ident">token</span>)
}
}
<span class="kw">fn</span> <span class="ident">requires_pre_validation</span>(<span class="ident">backend</span>: <span class="ident">Backend</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> {
<span class="kw">match</span> <span class="ident">backend</span> {
<span class="ident">Backend</span>::<span class="ident">Cranelift</span> <span class="op">=</span><span class="op">></span> <span class="bool-val">true</span>,
<span class="ident">Backend</span>::<span class="ident">LLVM</span> <span class="op">=</span><span class="op">></span> <span class="bool-val">false</span>,
<span class="ident">Backend</span>::<span class="ident">Singlepass</span> <span class="op">=</span><span class="op">></span> <span class="bool-val">false</span>,
}
}
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">EventSink</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span> {
<span class="ident">buffer</span>: <span class="ident">SmallVec</span><span class="op"><</span>[<span class="ident">Event</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span>; <span class="number">2</span>]<span class="op">></span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span> <span class="ident">EventSink</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span> {
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">push</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ev</span>: <span class="ident">Event</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span>) {
<span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">push</span>(<span class="ident">ev</span>);
}
}
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">MiddlewareChain</span> {
<span class="ident">chain</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Box</span><span class="op"><</span><span class="kw">dyn</span> <span class="ident">GenericFunctionMiddleware</span><span class="op">></span><span class="op">></span>,
}
<span class="kw">impl</span> <span class="ident">MiddlewareChain</span> {
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-</span><span class="op">></span> <span class="ident">MiddlewareChain</span> {
<span class="ident">MiddlewareChain</span> { <span class="ident">chain</span>: <span class="macro">vec</span><span class="macro">!</span>[] }
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">push</span><span class="op"><</span><span class="ident">M</span>: <span class="ident">FunctionMiddleware</span> <span class="op">+</span> <span class="lifetime">'static</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">m</span>: <span class="ident">M</span>) {
<span class="self">self</span>.<span class="ident">chain</span>.<span class="ident">push</span>(<span class="ident">Box</span>::<span class="ident">new</span>(<span class="ident">m</span>));
}
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">run</span><span class="op"><</span><span class="ident">E</span>: <span class="ident">Debug</span>, <span class="ident">FCG</span>: <span class="ident">FunctionCodeGenerator</span><span class="op"><</span><span class="ident">E</span><span class="op">></span><span class="op">></span>(
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>,
<span class="ident">fcg</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">FCG</span><span class="op">></span>,
<span class="ident">ev</span>: <span class="ident">Event</span>,
<span class="ident">module_info</span>: <span class="kw-2">&</span><span class="ident">ModuleInfo</span>,
) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">String</span><span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">sink</span> <span class="op">=</span> <span class="ident">EventSink</span> {
<span class="ident">buffer</span>: <span class="ident">SmallVec</span>::<span class="ident">new</span>(),
};
<span class="ident">sink</span>.<span class="ident">push</span>(<span class="ident">ev</span>);
<span class="kw">for</span> <span class="ident">m</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">chain</span> {
<span class="kw">let</span> <span class="ident">prev</span>: <span class="ident">SmallVec</span><span class="op"><</span>[<span class="ident">Event</span>; <span class="number">2</span>]<span class="op">></span> <span class="op">=</span> <span class="ident">sink</span>.<span class="ident">buffer</span>.<span class="ident">drain</span>().<span class="ident">collect</span>();
<span class="kw">for</span> <span class="ident">ev</span> <span class="kw">in</span> <span class="ident">prev</span> {
<span class="ident">m</span>.<span class="ident">feed_event</span>(<span class="ident">ev</span>, <span class="ident">module_info</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">sink</span>)<span class="question-mark">?</span>;
}
}
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">fcg</span>) <span class="op">=</span> <span class="ident">fcg</span> {
<span class="kw">for</span> <span class="ident">ev</span> <span class="kw">in</span> <span class="ident">sink</span>.<span class="ident">buffer</span> {
<span class="ident">fcg</span>.<span class="ident">feed_event</span>(<span class="ident">ev</span>, <span class="ident">module_info</span>)
.<span class="ident">map_err</span>(<span class="op">|</span><span class="ident">x</span><span class="op">|</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">x</span>))<span class="question-mark">?</span>;
}
}
<span class="prelude-val">Ok</span>(())
}
}
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">FunctionMiddleware</span> {
<span class="kw">type</span> <span class="ident">Error</span>: <span class="ident">Debug</span>;
<span class="kw">fn</span> <span class="ident">feed_event</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span>: <span class="lifetime">'a</span><span class="op">></span>(
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>,
<span class="ident">op</span>: <span class="ident">Event</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span>,
<span class="ident">module_info</span>: <span class="kw-2">&</span><span class="ident">ModuleInfo</span>,
<span class="ident">sink</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">EventSink</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span>,
) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="self">Self</span>::<span class="ident">Error</span><span class="op">></span>;
}
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">trait</span> <span class="ident">GenericFunctionMiddleware</span> {
<span class="kw">fn</span> <span class="ident">feed_event</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span>: <span class="lifetime">'a</span><span class="op">></span>(
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>,
<span class="ident">op</span>: <span class="ident">Event</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span>,
<span class="ident">module_info</span>: <span class="kw-2">&</span><span class="ident">ModuleInfo</span>,
<span class="ident">sink</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">EventSink</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span>,
) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">String</span><span class="op">></span>;
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">E</span>: <span class="ident">Debug</span>, <span class="ident">T</span>: <span class="ident">FunctionMiddleware</span><span class="op"><</span><span class="ident">Error</span> <span class="op">=</span> <span class="ident">E</span><span class="op">></span><span class="op">></span> <span class="ident">GenericFunctionMiddleware</span> <span class="kw">for</span> <span class="ident">T</span> {
<span class="kw">fn</span> <span class="ident">feed_event</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span>: <span class="lifetime">'a</span><span class="op">></span>(
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>,
<span class="ident">op</span>: <span class="ident">Event</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span>,
<span class="ident">module_info</span>: <span class="kw-2">&</span><span class="ident">ModuleInfo</span>,
<span class="ident">sink</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">EventSink</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span>,
) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">String</span><span class="op">></span> {
<span class="op"><</span><span class="self">Self</span> <span class="kw">as</span> <span class="ident">FunctionMiddleware</span><span class="op">></span>::<span class="ident">feed_event</span>(<span class="self">self</span>, <span class="ident">op</span>, <span class="ident">module_info</span>, <span class="ident">sink</span>)
.<span class="ident">map_err</span>(<span class="op">|</span><span class="ident">x</span><span class="op">|</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">x</span>))
}
}
<span class="doccomment">/// The function-scope code generator trait.</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">FunctionCodeGenerator</span><span class="op"><</span><span class="ident">E</span>: <span class="ident">Debug</span><span class="op">></span> {
<span class="doccomment">/// Sets the return type.</span>
<span class="kw">fn</span> <span class="ident">feed_return</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ty</span>: <span class="ident">WpType</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">E</span><span class="op">></span>;
<span class="doccomment">/// Adds a parameter to the function.</span>
<span class="kw">fn</span> <span class="ident">feed_param</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ty</span>: <span class="ident">WpType</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">E</span><span class="op">></span>;
<span class="doccomment">/// Adds `n` locals to the function.</span>
<span class="kw">fn</span> <span class="ident">feed_local</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ty</span>: <span class="ident">WpType</span>, <span class="ident">n</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">E</span><span class="op">></span>;
<span class="doccomment">/// Called before the first call to `feed_opcode`.</span>
<span class="kw">fn</span> <span class="ident">begin_body</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">module_info</span>: <span class="kw-2">&</span><span class="ident">ModuleInfo</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">E</span><span class="op">></span>;
<span class="doccomment">/// Called for each operator.</span>
<span class="kw">fn</span> <span class="ident">feed_event</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">op</span>: <span class="ident">Event</span>, <span class="ident">module_info</span>: <span class="kw-2">&</span><span class="ident">ModuleInfo</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">E</span><span class="op">></span>;
<span class="doccomment">/// Finalizes the function.</span>
<span class="kw">fn</span> <span class="ident">finalize</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">E</span><span class="op">></span>;
}
</pre></div>
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