lib/compile.js - compiler-explorer - Rivoreo Source Code Repositories

 // Copyright (c) 2012-2015, Matt Godbolt
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are met:
 //
 //     * Redistributions of source code must retain the above copyright notice,
 //       this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above copyright
 //       notice, this list of conditions and the following disclaimer in the
 //       documentation and/or other materials provided with the distribution.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 // POSSIBILITY OF SUCH DAMAGE.

 var props = require('./properties'),
     child_process = require('child_process'),
     temp = require('temp'),
     path = require('path'),
     httpProxy = require('http-proxy'),
     LRU = require('lru-cache'),
     fs = require('fs-extra'),
     Promise = require('promise'),
     Queue = require('promise-queue');

 Queue.configure(Promise);
 temp.track();

 function Compile(compilers) {
     this.compilersById = {};
     var self = this;
     compilers.forEach(function (compiler) {
         self.compilersById[compiler.id] = compiler;
     });
     this.okOptions = new RegExp(props.get('gcc-options', 'whitelistRe', '.*'));
     this.badOptions = new RegExp(props.get('gcc-options', 'blacklistRe'));
     this.cache = LRU({
         max: props.get('gcc-explorer', 'cacheMb') * 1024 * 1024,
         length: function (n) {
             return n.length;
         }
     });
     this.cacheHits = 0;
     this.cacheMisses = 0;
     this.compileQueue = new Queue(props.get("gcc-explorer", "maxConcurrentCompiles", 1), Infinity);
 }

 Compile.prototype.newTempDir = function () {
     return new Promise(function (resolve, reject) {
         temp.mkdir('gcc-explorer-compiler', function (err, dirPath) {
             if (err)
                 reject("Unable to open temp file: " + err);
             else
                 resolve(dirPath);
         });
     });
 };

 Compile.prototype.writeFile = Promise.denodeify(fs.writeFile);
 Compile.prototype.stat = Promise.denodeify(fs.stat);

 Compile.prototype.convert6g = function (code) {
     var re = /^[0-9]+\s*\(([^:]+):([0-9]+)\)\s*([A-Z]+)(.*)/;
     var prevLine = null;
     var file = null
     return code.split('\n').map(function (line) {
         var match = line.match(re);
         if (match) {
             var res = "";
             if (file == null) {
                 res += "\t.file 1 \"" + match[1] + "\"\n";
                 file = match[1];
             }
             if (prevLine != match[2]) {
                 res += "\t.loc 1 " + match[2] + "\n";
                 prevLine = match[2];
             }
             return res + "\t" + match[3].toLowerCase() + match[4];
         } else
             return null;
     }).filter(function (x) {
         return x;
     }).join("\n");
 };

 Compile.prototype.getRemote = function (compiler) {
     var compilerInfo = this.compilersById[compiler];
     if (!compilerInfo) return false;
     if (compilerInfo.exe === null && compilerInfo.remote)
         return compilerInfo.remote;
     return false;
 };

 Compile.prototype.runCompiler = function (compiler, options) {
     var okToCache = true;
     var child = child_process.spawn(
         compiler,
         options,
         {detached: true}
     );
     var stdout = "";
     var stderr = "";
     var timeout = setTimeout(function () {
         okToCache = false;
         child.kill();
         stderr += "\nKilled - processing time exceeded";
     }, props.get("gcc-explorer", "compileTimeoutMs", 100));
     child.stdout.on('data', function (data) {
         stdout += data;
     });
     child.stderr.on('data', function (data) {
         stderr += data;
     });
     return new Promise(function (resolve, reject) {
         child.on('error', function (e) {
             reject(e);
         });
         child.on('exit', function (code) {
             clearTimeout(timeout);
             resolve({code: code, stdout: stdout, stderr: stderr, okToCache: okToCache});
         });
         child.stdin.end();
     });
 };

 Compile.prototype.compile = function (source, compiler, options, filters) {
     var self = this;
     var optionsError = self.checkOptions(options);
     if (optionsError) return Promise.reject(optionsError);
     var sourceError = self.checkSource(source);
     if (sourceError) return Promise.reject(sourceError);

     var compilerInfo = self.compilersById[compiler];
     if (!compilerInfo) {
         return Promise.reject("Bad compiler " + compiler);
     }

     var key = compiler + " | " + source + " | " + options + " | " + filters.intel;
     var cached = self.cache.get(key);
     if (cached) {
         self.cacheHits++;
         self.cacheStats();
         return Promise.resolve(cached);
     }
     self.cacheMisses++;

     var tempFileAndDirPromise = Promise.resolve().then(function () {
         return self.newTempDir().then(function (dirPath) {
             var inputFilename = path.join(dirPath, props.get("gcc-explorer", "compileFilename"));
             return self.writeFile(inputFilename, source).then(function () {
                 return {inputFilename: inputFilename, dirPath: dirPath};
             });
         });
     });
     var compileToAsmPromise = tempFileAndDirPromise.then(function (info) {
         var inputFilename = info.inputFilename;
         var dirPath = info.dirPath;
         var postProcess = props.get("gcc-explorer", "postProcess");
         var outputFilename = path.join(dirPath, 'output.S');
         if (compilerInfo.supportedOpts['-masm']) {
             var syntax = '-masm=att'; // default at&t
             if (filters.intel) syntax = '-masm=intel';
             options = options.concat([syntax]);
         }
         var compileToAsm = props.get("gcc-explorer", "compileToAsm", "-S").split(" ");
         options = options.concat(['-g', '-o', outputFilename]).concat(compileToAsm).concat([inputFilename]);

         var compilerExe = compilerInfo.exe;
         var compilerWrapper = props.get("gcc-explorer", "compiler-wrapper");
         if (compilerWrapper) {
             options = [compilerExe].concat(options);
             compilerExe = compilerWrapper;
         }
         var maxSize = props.get("gcc-explorer", "max-asm-size", 8 * 1024 * 1024);
         return self.runCompiler(compilerExe, options).then(function (result) {
             result.dirPath = dirPath;
             if (result.code !== 0) {
                 result.asm = "<Compilation failed>";
                 return result;
             }
             if (compilerInfo.is6g) {
                 result.asm = self.convert6g(result.stdout);
                 result.stdout = "";
                 return Promise.resolve(result);
             }
             return self.stat(outputFilename).then(function (stat) {
                 if (stat.size >= maxSize) {
                     result.asm = "<No output: generated assembly was too large (" + stat.size + " > " + maxSize + " bytes)>";
                     return result;
                 }
                 return new Promise(function (resolve) {
                     child_process.exec('cat "' + outputFilename + '" | ' + postProcess,
                         {maxBuffer: maxSize},
                         function (err, data) {
                             if (err)
                                 data = '<No output: ' + err + '>';
                             result.asm = data;
                             resolve(result);
                         });
                 });
             }, function () {
                 result.asm = "<No output file>";
                 return result;
             });
         });
     });

     return self.compileQueue.add(function () {
         return compileToAsmPromise.then(function (result) {
             if (result.dirPath) {
                 fs.remove(result.dirPath);
                 result.dirPath = undefined;
             }
             if (result.okToCache) {
                 self.cache.set(key, result);
                 self.cacheStats();
             }
             return result;
         });
     });
 };

 Compile.prototype.checkOptions = function (options) {
     var error = [];
     var self = this;
     options.forEach(function (option) {
         if (!option.match(self.okOptions) || option.match(self.badOptions)) {
             error.push(option);
         }
     });
     if (error.length > 0) return "Bad options: " + error.join(", ");
     return null;
 };

 Compile.prototype.checkSource = function (source) {
     var re = /^\s*#include(_next)?\s+["<"](\/|.*\.\.)/;
     var failed = [];
     source.split('\n').forEach(function (line, index) {
         if (line.match(re)) {
             failed.push("<stdin>:" + (index + 1) + ":1: no absolute or relative includes please");
         }
     });
     if (failed.length > 0) return failed.join("\n");
     return null;
 };

 Compile.prototype.cacheStats = function () {
     console.log("Cache stats: " + this.cacheHits + " hits, " + this.cacheMisses + " misses");
 };

 function compileHandler(compilers) {
     var compileObj = new Compile(compilers);
     var proxy = httpProxy.createProxyServer({});

     return function compile(req, res, next) {
         var compiler = req.body.compiler;
         var remote = compileObj.getRemote(compiler);
         if (remote) {
             proxy.web(req, res, {target: remote}, function (e) {
                 console.log("Proxy error: ", e);
                 next(e);
             });
             return;
         }
         var source = req.body.source;
         if (!source || typeof(req.body.options) !== "string") {
             return next(new Error("Bad request"));
         }
         var options = req.body.options.split(' ').filter(function (x) {
             return x !== "";
         });
         var filters = req.body.filters;
         compileObj.compile(source, compiler, options, filters).then(
             function (result) {
                 res.set('Content-Type', 'application/json');
                 res.end(JSON.stringify(result));
             },
             function (error) {
                 console.log("Error: " + error.stack);
                 if (typeof(error) !== "string") {
                     error = "Internal GCC explorer error: " + error.toString();
                 }
                 res.end(JSON.stringify({code: -1, stderr: error}));
             }
         );
     };
 }

 module.exports = {
     compileHandler: compileHandler
 };
	// Copyright (c) 2012-2015, Matt Godbolt
	// All rights reserved.
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are met:
	//
	// * Redistributions of source code must retain the above copyright notice,
	// this list of conditions and the following disclaimer.
	// * Redistributions in binary form must reproduce the above copyright
	// notice, this list of conditions and the following disclaimer in the
	// documentation and/or other materials provided with the distribution.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
	// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	// POSSIBILITY OF SUCH DAMAGE.

	var props = require('./properties'),
	child_process = require('child_process'),
	temp = require('temp'),
	path = require('path'),
	httpProxy = require('http-proxy'),
	LRU = require('lru-cache'),
	fs = require('fs-extra'),
	Promise = require('promise'),
	Queue = require('promise-queue');

	Queue.configure(Promise);
	temp.track();

	function Compile(compilers) {
	this.compilersById = {};
	var self = this;
	compilers.forEach(function (compiler) {
	self.compilersById[compiler.id] = compiler;
	});
	this.okOptions = new RegExp(props.get('gcc-options', 'whitelistRe', '.*'));
	this.badOptions = new RegExp(props.get('gcc-options', 'blacklistRe'));
	this.cache = LRU({
	max: props.get('gcc-explorer', 'cacheMb') * 1024 * 1024,
	length: function (n) {
	return n.length;
	}
	});
	this.cacheHits = 0;
	this.cacheMisses = 0;
	this.compileQueue = new Queue(props.get("gcc-explorer", "maxConcurrentCompiles", 1), Infinity);
	}

	Compile.prototype.newTempDir = function () {
	return new Promise(function (resolve, reject) {
	temp.mkdir('gcc-explorer-compiler', function (err, dirPath) {
	if (err)
	reject("Unable to open temp file: " + err);
	else
	resolve(dirPath);
	});
	});
	};

	Compile.prototype.writeFile = Promise.denodeify(fs.writeFile);
	Compile.prototype.stat = Promise.denodeify(fs.stat);

	Compile.prototype.convert6g = function (code) {
	var re = /^[0-9]+\s\(([^:]+):([0-9]+)\)\s([A-Z]+)(.*)/;
	var prevLine = null;
	var file = null
	return code.split('\n').map(function (line) {
	var match = line.match(re);
	if (match) {
	var res = "";
	if (file == null) {
	res += "\t.file 1 \"" + match[1] + "\"\n";
	file = match[1];
	}
	if (prevLine != match[2]) {
	res += "\t.loc 1 " + match[2] + "\n";
	prevLine = match[2];
	}
	return res + "\t" + match[3].toLowerCase() + match[4];
	} else
	return null;
	}).filter(function (x) {
	return x;
	}).join("\n");
	};

	Compile.prototype.getRemote = function (compiler) {
	var compilerInfo = this.compilersById[compiler];
	if (!compilerInfo) return false;
	if (compilerInfo.exe === null && compilerInfo.remote)
	return compilerInfo.remote;
	return false;
	};

	Compile.prototype.runCompiler = function (compiler, options) {
	var okToCache = true;
	var child = child_process.spawn(
	compiler,
	options,
	{detached: true}
	);
	var stdout = "";
	var stderr = "";
	var timeout = setTimeout(function () {
	okToCache = false;
	child.kill();
	stderr += "\nKilled - processing time exceeded";
	}, props.get("gcc-explorer", "compileTimeoutMs", 100));
	child.stdout.on('data', function (data) {
	stdout += data;
	});
	child.stderr.on('data', function (data) {
	stderr += data;
	});
	return new Promise(function (resolve, reject) {
	child.on('error', function (e) {
	reject(e);
	});
	child.on('exit', function (code) {
	clearTimeout(timeout);
	resolve({code: code, stdout: stdout, stderr: stderr, okToCache: okToCache});
	});
	child.stdin.end();
	});
	};

	Compile.prototype.compile = function (source, compiler, options, filters) {
	var self = this;
	var optionsError = self.checkOptions(options);
	if (optionsError) return Promise.reject(optionsError);
	var sourceError = self.checkSource(source);
	if (sourceError) return Promise.reject(sourceError);

	var compilerInfo = self.compilersById[compiler];
	if (!compilerInfo) {
	return Promise.reject("Bad compiler " + compiler);
	}

	var key = compiler + " \| " + source + " \| " + options + " \| " + filters.intel;
	var cached = self.cache.get(key);
	if (cached) {
	self.cacheHits++;
	self.cacheStats();
	return Promise.resolve(cached);
	}
	self.cacheMisses++;

	var tempFileAndDirPromise = Promise.resolve().then(function () {
	return self.newTempDir().then(function (dirPath) {
	var inputFilename = path.join(dirPath, props.get("gcc-explorer", "compileFilename"));
	return self.writeFile(inputFilename, source).then(function () {
	return {inputFilename: inputFilename, dirPath: dirPath};
	});
	});
	});
	var compileToAsmPromise = tempFileAndDirPromise.then(function (info) {
	var inputFilename = info.inputFilename;
	var dirPath = info.dirPath;
	var postProcess = props.get("gcc-explorer", "postProcess");
	var outputFilename = path.join(dirPath, 'output.S');
	if (compilerInfo.supportedOpts['-masm']) {
	var syntax = '-masm=att'; // default at&t
	if (filters.intel) syntax = '-masm=intel';
	options = options.concat([syntax]);
	}
	var compileToAsm = props.get("gcc-explorer", "compileToAsm", "-S").split(" ");
	options = options.concat(['-g', '-o', outputFilename]).concat(compileToAsm).concat([inputFilename]);

	var compilerExe = compilerInfo.exe;
	var compilerWrapper = props.get("gcc-explorer", "compiler-wrapper");
	if (compilerWrapper) {
	options = [compilerExe].concat(options);
	compilerExe = compilerWrapper;
	}
	var maxSize = props.get("gcc-explorer", "max-asm-size", 8 * 1024 * 1024);
	return self.runCompiler(compilerExe, options).then(function (result) {
	result.dirPath = dirPath;
	if (result.code !== 0) {
	result.asm = "<Compilation failed>";
	return result;
	}
	if (compilerInfo.is6g) {
	result.asm = self.convert6g(result.stdout);
	result.stdout = "";
	return Promise.resolve(result);
	}
	return self.stat(outputFilename).then(function (stat) {
	if (stat.size >= maxSize) {
	result.asm = "<No output: generated assembly was too large (" + stat.size + " > " + maxSize + " bytes)>";
	return result;
	}
	return new Promise(function (resolve) {
	child_process.exec('cat "' + outputFilename + '" \| ' + postProcess,
	{maxBuffer: maxSize},
	function (err, data) {
	if (err)
	data = '<No output: ' + err + '>';
	result.asm = data;
	resolve(result);
	});
	});
	}, function () {
	result.asm = "<No output file>";
	return result;
	});
	});
	});

	return self.compileQueue.add(function () {
	return compileToAsmPromise.then(function (result) {
	if (result.dirPath) {
	fs.remove(result.dirPath);
	result.dirPath = undefined;
	}
	if (result.okToCache) {
	self.cache.set(key, result);
	self.cacheStats();
	}
	return result;
	});
	});
	};

	Compile.prototype.checkOptions = function (options) {
	var error = [];
	var self = this;
	options.forEach(function (option) {
	if (!option.match(self.okOptions) \|\| option.match(self.badOptions)) {
	error.push(option);
	}
	});
	if (error.length > 0) return "Bad options: " + error.join(", ");
	return null;
	};

	Compile.prototype.checkSource = function (source) {
	var re = /^\s#include(_next)?\s+["<"](\/\|.\.\.)/;
	var failed = [];
	source.split('\n').forEach(function (line, index) {
	if (line.match(re)) {
	failed.push("<stdin>:" + (index + 1) + ":1: no absolute or relative includes please");
	}
	});
	if (failed.length > 0) return failed.join("\n");
	return null;
	};

	Compile.prototype.cacheStats = function () {
	console.log("Cache stats: " + this.cacheHits + " hits, " + this.cacheMisses + " misses");
	};

	function compileHandler(compilers) {
	var compileObj = new Compile(compilers);
	var proxy = httpProxy.createProxyServer({});

	return function compile(req, res, next) {
	var compiler = req.body.compiler;
	var remote = compileObj.getRemote(compiler);
	if (remote) {
	proxy.web(req, res, {target: remote}, function (e) {
	console.log("Proxy error: ", e);
	next(e);
	});
	return;
	}
	var source = req.body.source;
	if (!source \|\| typeof(req.body.options) !== "string") {
	return next(new Error("Bad request"));
	}
	var options = req.body.options.split(' ').filter(function (x) {
	return x !== "";
	});
	var filters = req.body.filters;
	compileObj.compile(source, compiler, options, filters).then(
	function (result) {
	res.set('Content-Type', 'application/json');
	res.end(JSON.stringify(result));
	},
	function (error) {
	console.log("Error: " + error.stack);
	if (typeof(error) !== "string") {
	error = "Internal GCC explorer error: " + error.toString();
	}
	res.end(JSON.stringify({code: -1, stderr: error}));
	}
	);
	};
	}

	module.exports = {
	compileHandler: compileHandler
	};