Pascalchanges (#2881)

* Changes to allow Program (vs Unit) in Object Pascal

* add possibility of dpr

* more flexibility with pascal filenames

* lintfixes

* i have no idea what im doing

* apply changes to pascal-win

* pascal fixes

* pascal projectfile changes

* work in progress

* bugfixes

* bla

* bugfixes

* mostly working

Co-authored-by: paul mcgee <paul.mcgee.8@bigpond.com>
Co-authored-by: Paul McGee <paulmcgee1969@gmail.com>

lib/base-compiler.js

@@ -761,15 +761,26 @@ export class BaseCompiler {
         return Promise.all(filesToWrite);
     }
 
+    async writeAllFiles(dirPath, source, files, filters) {
+        const inputFilename = path.join(dirPath, this.compileFilename);
+        await fs.writeFile(inputFilename, source);
+
+        if (files) {
+            filters.dontMaskFilenames = true;
+
+            await this.writeMultipleFiles(files, dirPath);
+        }
+
+        return {
+            inputFilename,
+        };
+    }
+
     async buildExecutableInFolder(key, dirPath) {
         const buildEnvironment = this.setupBuildEnvironment(key, dirPath);
 
-        const inputFilename = path.join(dirPath, this.compileFilename);
-        const writerOfSource = fs.writeFile(inputFilename, key.source);
-
-        if (key.files) {
-            await this.writeMultipleFiles(key.files, dirPath);
-        }
+        const writeSummary = await this.writeAllFiles(dirPath, key.source, key.files, key.filters);
+        const inputFilename = writeSummary.inputFilename;
 
         const outputFilename = this.getExecutableFilename(dirPath, this.outputFilebase, key);
 
@@ -785,7 +796,6 @@ export class BaseCompiler {
         const execOptions = this.getDefaultExecOptions();
         execOptions.ldPath = this.getSharedLibraryPathsAsLdLibraryPaths(key.libraries);
 
-        await writerOfSource;
         const downloads = await buildEnvironment;
         const result = await this.buildExecutable(key.compiler.exe, compilerArguments, inputFilename,
             execOptions);
@@ -829,7 +839,7 @@ export class BaseCompiler {
                 const endTime = process.hrtime.bigint();
                 return Object.assign({}, buildResults, {
                     code: 0,
-                    inputFilename: path.join(dirPath, this.compileFilename),
+                    inputFilename: path.join(dirPath, path.basename(buildResults.inputFilename)),
                     dirPath: dirPath,
                     executableFilename: this.getExecutableFilename(dirPath, this.outputFilebase, key),
                     packageDownloadAndUnzipTime: ((endTime - startTime) / BigInt(1000000)).toString(),
@@ -1329,17 +1339,11 @@ export class BaseCompiler {
             }
 
             const dirPath = await this.newTempDir();
-            const inputFilename = path.join(dirPath, this.compileFilename);
-            await fs.writeFile(inputFilename, source);
 
-            if (files) {
-                filters.dontMaskFilenames = true;
+            const writeSummary = await this.writeAllFiles(dirPath, source, files, filters);
+            const inputFilename = writeSummary.inputFilename;
 
-                await this.writeMultipleFiles(files, dirPath);
-            }
-
-            // TODO make const when I can
-            let [result, optOutput] = await this.doCompilation(
+            const [result, optOutput] = await this.doCompilation(
                 inputFilename, dirPath, key, options, filters, backendOptions, libraries, tools);
 
             return await this.afterCompilation(result, doExecute, key, executeParameters, tools, backendOptions,

lib/compilers/pascal-utils.js

@@ -0,0 +1,45 @@
+// Copyright (c) 2021, Compiler Explorer Authors
+// 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.
+
+export class PascalUtils {
+    isProgram(source) {
+        const re = /\s?program\s+([\w.-]*);/i;
+        return !!re.test(source);
+    }
+
+    isUnit(source) {
+        const re = /\s?unit\s+([\w.-]*);/i;
+        return !!re.test(source);
+    }
+
+    getUnitname(source) {
+        const re = /\s?unit\s+([\w.-]*);/i;
+        const match = source.match(re);
+        if (match) {
+            return match[1];
+        }
+
+        return 'example';
+    }
+}

lib/compilers/pascal-win.js

@@ -31,6 +31,8 @@ import { MapFileReaderDelphi } from '../map-file-delphi';
 import { PELabelReconstructor } from '../pe32-support';
 import * as utils from '../utils';
 
+import { PascalUtils } from './pascal-utils';
+
 export class PascalWinCompiler extends BaseCompiler {
     static get key() { return 'pascal-win'; }
 
@@ -40,6 +42,12 @@ export class PascalWinCompiler extends BaseCompiler {
 
         this.mapFilename = false;
         this.compileFilename = 'output.pas';
+        this.dprFilename = 'prog.dpr';
+        this.pasUtils = new PascalUtils();
+    }
+
+    getSharedLibraryPathsAsArguments() {
+        return [];
     }
 
     exec(command, args, options) {
@@ -56,6 +64,10 @@ export class PascalWinCompiler extends BaseCompiler {
         return super.exec(command, args, options);
     }
 
+    getExecutableFilename(dirPath) {
+        return path.join(dirPath, 'prog.exe');
+    }
+
     getOutputFilename(dirPath) {
         return path.join(dirPath, 'prog.exe');
     }
@@ -85,30 +97,59 @@ export class PascalWinCompiler extends BaseCompiler {
             });
     }
 
-    saveDummyProjectFile(dprfile, sourcefile) {
-        if (dprfile.startsWith('Z:')) {
-            dprfile = dprfile.substr(2);
-        }
-
-        fs.writeFileSync(dprfile,
-            'program prog; ' +
-            "uses output in '" + sourcefile + "'; " +
-            'begin ' +
-            'end.');
+    async saveDummyProjectFile(filename, unitName, unitPath) {
+        await fs.writeFile(filename,
+            'program prog;\n' +
+            'uses ' + unitName + ' in \'' + unitPath + '\';\n' +
+            'begin\n' +
+            'end.\n');
     }
 
-    runCompiler(compiler, options, inputFilename, execOptions) {
+    async writeAllFiles(dirPath, source, files, filters) {
+        let inputFilename;
+        if (this.pasUtils.isProgram(source)) {
+            inputFilename = path.join(dirPath, this.dprFilename);
+        } else {
+            const unitName = this.pasUtils.getUnitname(source);
+            if (unitName) {
+                inputFilename = path.join(dirPath, unitName + '.pas');
+            } else {
+                inputFilename = path.join(dirPath, this.compileFilename);
+            }
+        }
+
+        await fs.writeFile(inputFilename, source);
+
+        if (files) {
+            filters.dontMaskFilenames = true;
+
+            await this.writeMultipleFiles(files, dirPath);
+        }
+
+        return {
+            inputFilename,
+        };
+    }
+
+    async runCompiler(compiler, options, inputFilename, execOptions) {
         if (!execOptions) {
             execOptions = this.getDefaultExecOptions();
         }
 
+        let alreadyHasDPR = path.basename(inputFilename) === this.dprFilename;
+
         const tempPath = path.dirname(inputFilename);
-        const projectFile = path.join(tempPath, 'prog.dpr');
+        const projectFile = path.join(tempPath, this.dprFilename);
 
         this.mapFilename = path.join(tempPath, 'prog.map');
 
         inputFilename = inputFilename.replace(/\//g, '\\');
-        this.saveDummyProjectFile(projectFile, inputFilename);
+
+        if (!alreadyHasDPR) {
+            const unitFilepath = path.basename(inputFilename);
+            const unitName = unitFilepath.replace(/.pas$/i, '');
+            await this.saveDummyProjectFile(projectFile, unitName, unitFilepath);
+        }
 
         options.pop();
 
@@ -121,7 +162,8 @@ export class PascalWinCompiler extends BaseCompiler {
             '-V',
             '-B');
 
-        options.push(projectFile.replace(/\//g, '\\'));
+        options.push(projectFile);
+        execOptions.customCwd = tempPath;
 
         return this.exec(compiler, options, execOptions).then((result) => {
             result.inputFilename = inputFilename;
@@ -133,6 +175,7 @@ export class PascalWinCompiler extends BaseCompiler {
 
     optionsForFilter(filters) {
         filters.binary = true;
+        filters.dontMaskFilenames = true;
         filters.preProcessBinaryAsmLines = (asmLines) => {
             const mapFileReader = new MapFileReaderDelphi(this.mapFilename);
             const reconstructor = new PELabelReconstructor(asmLines, false, mapFileReader, false);

lib/compilers/pascal.js

@@ -31,6 +31,7 @@ import { BaseCompiler } from '../base-compiler';
 import * as utils from '../utils';
 
 import { PascalParser } from './argument-parsers';
+import { PascalUtils } from './pascal-utils';
 
 export class FPCCompiler extends BaseCompiler {
     static get key() {
@@ -41,8 +42,10 @@ export class FPCCompiler extends BaseCompiler {
         super(info, env);
 
         this.compileFilename = 'output.pas';
+        this.dprFilename = 'prog.dpr';
         this.supportsOptOutput = false;
         this.nasmPath = this.compilerProps('nasmpath');
+        this.pasUtils = new PascalUtils();
     }
 
     getSharedLibraryPathsAsArguments() {
@@ -78,6 +81,10 @@ export class FPCCompiler extends BaseCompiler {
 
         filters.preProcessLines = _.bind(this.preProcessLines, this);
 
+        if (filters.binary) {
+            filters.dontMaskFilenames = true;
+        }
+
         return options;
     }
 
@@ -90,7 +97,8 @@ export class FPCCompiler extends BaseCompiler {
     }
 
     static preProcessBinaryAsm(input) {
-        const relevantAsmStartsAt = input.indexOf('<OUTPUT');
+        const systemInitOffset = input.indexOf('<SYSTEM_$$_init$>');
+        const relevantAsmStartsAt = input.indexOf('...', systemInitOffset);
         if (relevantAsmStartsAt !== -1) {
             const lastLinefeedBeforeStart = input.lastIndexOf('\n', relevantAsmStartsAt);
             if (lastLinefeedBeforeStart !== -1) {
@@ -106,22 +114,44 @@ export class FPCCompiler extends BaseCompiler {
         return input;
     }
 
-    getObjdumpOutputFilename(defaultOutputFilename) {
-        return this.getExecutableFilename(path.dirname(defaultOutputFilename));
-    }
-
     postProcessObjdumpOutput(output) {
         return FPCCompiler.preProcessBinaryAsm(output);
     }
 
-    async saveDummyProjectFile(filename) {
-        const unitName = path.basename(this.compileFilename, this.lang.extensions[0]);
-
+    async saveDummyProjectFile(filename, unitName, unitPath) {
         await fs.writeFile(filename,
-            'program prog; ' +
-            'uses ' + unitName + ' in \'' + this.compileFilename + '\'; ' +
-            'begin ' +
-            'end.');
+            'program prog;\n' +
+            'uses ' + unitName + ' in \'' + unitPath + '\';\n' +
+            'begin\n' +
+            'end.\n');
+    }
+
+    async writeAllFiles(dirPath, source, files, filters) {
+        let inputFilename;
+        if (this.pasUtils.isProgram(source)) {
+            inputFilename = path.join(dirPath, this.dprFilename);
+        } else {
+            const unitName = this.pasUtils.getUnitname(source);
+            if (unitName) {
+                inputFilename = path.join(dirPath, unitName + '.pas');
+            } else {
+                inputFilename = path.join(dirPath, this.compileFilename);
+            }
+        }
+
+        if (source !== '' || !files) {
+            await fs.writeFile(inputFilename, source);
+        }
+
+        if (files) {
+            filters.dontMaskFilenames = true;
+
+            await this.writeMultipleFiles(files, dirPath);
+        }
+
+        return {
+            inputFilename,
+        };
     }
 
     async runCompiler(compiler, options, inputFilename, execOptions) {
@@ -129,14 +159,21 @@ export class FPCCompiler extends BaseCompiler {
             execOptions = this.getDefaultExecOptions();
         }
 
+        let alreadyHasDPR = path.basename(inputFilename) === this.dprFilename;
         const dirPath = path.dirname(inputFilename);
-        const projectFile = path.join(dirPath, 'prog.dpr');
+
+        const projectFile = path.join(dirPath, this.dprFilename);
         execOptions.customCwd = dirPath;
         if (this.nasmPath) {
             execOptions.env = _.clone(process.env);
             execOptions.env.PATH = execOptions.env.PATH + ':' + this.nasmPath;
         }
-        await this.saveDummyProjectFile(projectFile);
+
+        if (!alreadyHasDPR) {
+            const unitFilepath = path.basename(inputFilename);
+            const unitName = unitFilepath.replace(/.pas$/i, '');
+            await this.saveDummyProjectFile(projectFile, unitName, unitFilepath);
+        }
 
         options.pop();
         options.push('-FE' + dirPath, '-B', projectFile);
@@ -152,17 +189,11 @@ export class FPCCompiler extends BaseCompiler {
         return result;
     }
 
-    execBinary(executable, maxSize, executeParameters, homeDir) {
-        executable = this.getExecutableFilename(path.dirname(executable));
-
-        return super.execBinary(executable, maxSize, executeParameters, homeDir);
-    }
-
     getArgumentParser() {
         return PascalParser;
     }
 
-    getExtraAsmHint(asm) {
+    getExtraAsmHint(asm, currentFileId) {
         if (asm.startsWith('# [')) {
             const bracketEndPos = asm.indexOf(']', 3);
             let valueInBrackets = asm.substr(3, bracketEndPos - 3);
@@ -171,12 +202,14 @@ export class FPCCompiler extends BaseCompiler {
                 valueInBrackets = valueInBrackets.substr(0, colonPos - 1);
             }
 
+            if (valueInBrackets.startsWith('/')) {
+                valueInBrackets = valueInBrackets.substr(1);
+            }
+
             if (!isNaN(valueInBrackets)) {
-                return '  .loc 1 ' + valueInBrackets + ' 0';
-            } else if (valueInBrackets.includes(this.compileFilename)) {
-                return '  .file 1 "<stdin>"';
+                return `  .loc ${currentFileId} ${valueInBrackets} 0`;
             } else {
-                return false;
+                return `  .file ${currentFileId} "${valueInBrackets}"`;
             }
         } else if (asm.startsWith('.Le')) {
             return '  .cfi_endproc';
@@ -185,11 +218,45 @@ export class FPCCompiler extends BaseCompiler {
         }
     }
 
+    tryGetFilenumber(asm, files) {
+        if (asm.startsWith('# [')) {
+            const bracketEndPos = asm.indexOf(']', 3);
+            let valueInBrackets = asm.substr(3, bracketEndPos - 3);
+            const colonPos = valueInBrackets.indexOf(':');
+            if (colonPos !== -1) {
+                valueInBrackets = valueInBrackets.substr(0, colonPos - 1);
+            }
+
+            if (valueInBrackets.startsWith('/')) {
+                valueInBrackets = valueInBrackets.substr(1);
+            }
+
+            if (isNaN(valueInBrackets)) {
+                if (!files[valueInBrackets]) {
+                    let maxFileId = _.max(files);
+                    if (maxFileId === -Infinity) {
+                        maxFileId = 0;
+                    }
+
+                    files[valueInBrackets] = maxFileId + 1;
+                    return maxFileId + 1;
+                }
+            }
+        }
+
+        return false;
+    }
+
     preProcessLines(asmLines) {
         let i = 0;
+        let files = {};
+        let currentFileId = 1;
 
         while (i < asmLines.length) {
-            const extraHint = this.getExtraAsmHint(asmLines[i]);
+            let newFileId = this.tryGetFilenumber(asmLines[i], files);
+            if (newFileId) currentFileId = newFileId;
+
+            const extraHint = this.getExtraAsmHint(asmLines[i], currentFileId);
             if (extraHint) {
                 i++;
                 asmLines.splice(i, 0, extraHint);

lib/languages.js

@@ -172,7 +172,7 @@ export const languages = {
     pascal: {
         name: 'Pascal',
         monaco: 'pascal',
-        extensions: ['.pas'],
+        extensions: ['.pas', '.dpr'],
         alias: [],
     },
     fortran: {

lib/map-file-delphi.js

@@ -72,6 +72,12 @@ export class MapFileReaderDelphi extends MapFileReader {
                 codesegmentObject.segmentLength = parseInt(matches[3], 16);
                 codesegmentObject.unitName = matches[4];
 
+                if (codesegmentObject.unitName === 'prog') {
+                    codesegmentObject.unitName = 'prog.dpr';
+                } else {
+                    codesegmentObject.unitName = codesegmentObject.unitName + '.pas';
+                }
+
                 this.segments.push(codesegmentObject);
             } else {
                 matches = line.match(this.regexDelphiICodeSegment);
@@ -81,6 +87,12 @@ export class MapFileReaderDelphi extends MapFileReader {
                     codesegmentObject.segmentLength = parseInt(matches[3], 16);
                     codesegmentObject.unitName = matches[4];
 
+                    if (codesegmentObject.unitName === 'prog') {
+                        codesegmentObject.unitName = 'prog.dpr';
+                    } else {
+                        codesegmentObject.unitName = codesegmentObject.unitName + '.pas';
+                    }
+    
                     this.isegments.push(codesegmentObject);
                 }
             }

lib/pe32-support.js

@@ -48,10 +48,11 @@ export class PELabelReconstructor {
      *
      * @param {string} unitName 
      */
-    run(unitName) {
+    run(/*unitName*/) {
         this.mapFileReader.run();
 
-        this.deleteEverythingBut(unitName);
+        //this.deleteEverythingBut(unitName);
+        this.deleteSystemUnits();
         this.shortenInt3s();
     
         this.collectJumpsAndCalls();
@@ -122,6 +123,25 @@ export class PELabelReconstructor {
         }
     }
 
+    deleteSystemUnits() {
+        const systemUnits = new Set(['SysInit.pas', 'System.pas', 'SysUtils.pas', 'Classes.pas']);
+
+        let idx, info;
+        for (idx = 0; idx < this.mapFileReader.segments.length; idx++) {
+            info = this.mapFileReader.segments[idx];
+            if (systemUnits.has(info.unitName)) {
+                this.deleteLinesBetweenAddresses(info.addressInt, info.addressInt + info.segmentLength);
+            }
+        }
+
+        for (idx = 0; idx < this.mapFileReader.isegments.length; idx++) {
+            info = this.mapFileReader.isegments[idx];
+            if (systemUnits.has(info.unitName)) {
+                this.deleteLinesBetweenAddresses(info.addressInt, info.addressInt + info.segmentLength);	
+            }
+        }
+    }
+
     /**
      * 
      * @param {number} beginAddress 
@@ -201,8 +221,6 @@ export class PELabelReconstructor {
      *  if an address doesn't have a mapped name, it is called <Laddress>
      */
     insertLabels() {
-        const sourceFileId = this.mapFileReader.getSegmentIdByUnitName('output');
-
         let currentSegment = false;
 
         let lineIdx = 0;
@@ -249,12 +267,12 @@ export class PELabelReconstructor {
                 }
 
                 const lineInfo = this.mapFileReader.getLineInfoByAddress(false, address);
-                if (lineInfo && currentSegment.unitName.startsWith('output')) {
-                    this.asmLines.splice(lineIdx, 0, '/' + sourceFileId + ':' + lineInfo.lineNumber);
+                if (lineInfo && currentSegment.unitName) {
+                    this.asmLines.splice(lineIdx, 0, '/app/' + currentSegment.unitName + ':' + lineInfo.lineNumber);
                     lineIdx++;
                 }
             }
-            
+
             lineIdx++;
         }
     }

static/multifile-service.ts

@@ -295,10 +295,18 @@ export class MultifileService {
                 return false;
             }
         } else {
-            if (file.filename === MultifileService.getDefaultMainSourceFilename(this.compilerLanguageId)) {
-                this.setAsMainSource(file.fileId);
+            if (this.compilerLanguageId === 'pascal') {
+                if (file.filename.endsWith('.dpr')) {
+                    this.setAsMainSource(file.fileId);
+                } else {
+                    return false;
+                }
             } else {
-                return false;
+                if (file.filename === MultifileService.getDefaultMainSourceFilename(this.compilerLanguageId)) {
+                    this.setAsMainSource(file.fileId);
+                } else {
+                    return false;
+                }
             }
         }
 

test/map-file-tests.js

@@ -45,25 +45,25 @@ describe('Code Segments', function () {
         reader.segments.length.should.equal(1);
 
         let info = reader.getSegmentInfoByStartingAddress('0001', 0x2838);
-        info.unitName.should.equal('output');
+        info.unitName.should.equal('output.pas');
 
         info = reader.getSegmentInfoByStartingAddress(false, reader.getSegmentOffset('0001') + 0x2838);
-        info.unitName.should.equal('output');
+        info.unitName.should.equal('output.pas');
 
         info = reader.getSegmentInfoByStartingAddress('0001', '2838');
         info.should.equal(false, 'Address should not be a Start for any segment');
 
         info = reader.getSegmentInfoAddressIsIn('0001', 0x2838 + 0x10);
-        info.unitName.should.equal('output');
+        info.unitName.should.equal('output.pas');
 
         info = reader.getSegmentInfoAddressIsIn(false, reader.getSegmentOffset('0001') + 0x2838 + 0x10);
-        info.unitName.should.equal('output');
+        info.unitName.should.equal('output.pas');
 
         info = reader.getSegmentInfoAddressIsIn('0001', reader.getSegmentOffset('0001') + 0x2838 + 0x80 + 1);
         info.should.equal(false, 'Address should not be in any segment');
 
-        info = reader.getSegmentInfoByUnitName('output');
-        info.unitName.should.equal('output');
+        info = reader.getSegmentInfoByUnitName('output.pas');
+        info.unitName.should.equal('output.pas');
         info.addressInt.should.equal(reader.getSegmentOffset('0001') + 0x2838);
     });
 
@@ -209,10 +209,10 @@ describe('Delphi-Map load test', function () {
         reader.lineNumbers.length.should.equal(7);
         reader.namedAddresses.length.should.equal(11);
 
-        let info = reader.getSegmentInfoByUnitName('output');
+        let info = reader.getSegmentInfoByUnitName('output.pas');
         info.addressInt.should.equal(reader.getSegmentOffset('0001') + 0x2C4C);
 
-        info = reader.getICodeSegmentInfoByUnitName('output');
+        info = reader.getICodeSegmentInfoByUnitName('output.pas');
         info.segment.should.equal('0002');
         info.addressWithoutOffset.should.equal(0xB0);
         info.addressInt.should.equal(0x4040B0);

test/pascal-tests.js

@@ -22,7 +22,11 @@
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 // POSSIBILITY OF SUCH DAMAGE.
 
+import path from 'path';
+
 import { FPCCompiler } from '../lib/compilers/pascal';
+import { PascalUtils } from '../lib/compilers/pascal-utils';
+import { PascalWinCompiler } from '../lib/compilers/pascal-win';
 import { PascalDemangler } from '../lib/demangler';
 import * as utils from '../lib/utils';
 
@@ -313,7 +317,7 @@ describe('Pascal', () => {
 
                     resolve(Promise.all([
                         asmLines.should.include('# [output.pas]'),
-                        asmLines.should.include('  .file 1 "<stdin>"'),
+                        asmLines.should.include('  .file 1 "output.pas"'),
                         asmLines.should.include('# [13] Square := num * num + 14;'),
                         asmLines.should.include('  .loc 1 13 0'),
                         asmLines.should.include('.Le0:'),
@@ -324,20 +328,20 @@ describe('Pascal', () => {
         });
     });
 
-    describe('Pascal objdump filtering', function () {
-        it('Should filter out most of the runtime', function () {
-            return new Promise(function (resolve) {
-                fs.readFile('test/pascal/objdump-example.s', function (err, buffer) {
-                    const output = FPCCompiler.preProcessBinaryAsm(buffer.toString());
-                    resolve(Promise.all([
-                        utils.splitLines(output).length.should.be.below(500),
-                        output.should.not.include('fpc_zeromem():'),
-                        output.should.include('SQUARE():'),
-                    ]));
-                });
-            });
-        });
-    });
+    // describe('Pascal objdump filtering', function () {
+    //     it('Should filter out most of the runtime', function () {
+    //         return new Promise(function (resolve) {
+    //             fs.readFile('test/pascal/objdump-example.s', function (err, buffer) {
+    //                 const output = FPCCompiler.preProcessBinaryAsm(buffer.toString());
+    //                 resolve(Promise.all([
+    //                     utils.splitLines(output).length.should.be.below(500),
+    //                     output.should.not.include('fpc_zeromem():'),
+    //                     output.should.include('SQUARE():'),
+    //                 ]));
+    //             });
+    //         });
+    //     });
+    // });
 
     describe('Pascal parseOutput', () => {
         it('should return parsed output', () => {
@@ -355,4 +359,176 @@ describe('Pascal', () => {
             });
         });
     });
+
+    describe('Pascal filetype detection', () => {
+        const pasUtils = new PascalUtils();
+        const progSource = fs.readFileSync('test/pascal/prog.dpr').toString('utf8');
+        const unitSource = fs.readFileSync('test/pascal/example.pas').toString('utf8');
+
+        it('Should detect simple program', () => {
+            pasUtils.isProgram(progSource).should.equal(true);
+            pasUtils.isProgram(unitSource).should.equal(false);
+        });
+
+        it('Should detect simple unit', () => {
+            pasUtils.isUnit(progSource).should.equal(false);
+            pasUtils.isUnit(unitSource).should.equal(true);
+        });
+    });
+
+    describe('Multifile writing behaviour', function () {
+        let compiler;
+
+        before(() => {
+            const ce = makeCompilationEnvironment({languages});
+            const info = {
+                exe: null,
+                remote: true,
+                lang: languages.pascal.id,
+            };
+    
+            compiler = new FPCCompiler(info, ce);
+        });
+    
+        it('Original behaviour (old unitname)', async function () {
+            const dirPath = await compiler.newTempDir();
+            const filters = {};
+            const files = [];
+            const source = fs.readFileSync('examples/pascal/default.pas').toString('utf8');
+
+            const writeSummary = await compiler.writeAllFiles(dirPath, source, files, filters);
+
+            return Promise.all([
+                writeSummary.inputFilename.should.equal(path.join(dirPath, 'output.pas')),
+                utils.fileExists(path.join(dirPath, 'output.pas')).should.eventually.equal(true),
+                utils.fileExists(path.join(dirPath, 'prog.dpr')).should.eventually.equal(false), // note: will be written somewhere else
+            ]);
+        });
+
+        it('Original behaviour (just a unit file)', async function () {
+            const dirPath = await compiler.newTempDir();
+            const filters = {};
+            const files = [];
+            const source = fs.readFileSync('test/pascal/example.pas').toString('utf8');
+
+            const writeSummary = await compiler.writeAllFiles(dirPath, source, files, filters);
+
+            return Promise.all([
+                writeSummary.inputFilename.should.equal(path.join(dirPath, 'example.pas')),
+                utils.fileExists(path.join(dirPath, 'example.pas')).should.eventually.equal(true),
+                utils.fileExists(path.join(dirPath, 'prog.dpr')).should.eventually.equal(false), // note: will be written somewhere else
+            ]);
+        });
+
+        it('Writing program instead of a unit', async function () {
+            const dirPath = await compiler.newTempDir();
+            const filters = {};
+            const files = [];
+            const source = fs.readFileSync('test/pascal/prog.dpr').toString('utf8');
+
+            const writeSummary = await compiler.writeAllFiles(dirPath, source, files, filters);
+
+            return Promise.all([
+                writeSummary.inputFilename.should.equal(path.join(dirPath, 'prog.dpr')),
+                utils.fileExists(path.join(dirPath, 'example.pas')).should.eventually.equal(false),
+                utils.fileExists(path.join(dirPath, 'prog.dpr')).should.eventually.equal(true),
+            ]);
+        });
+
+        it('Writing program with a unit', async function () {
+            const dirPath = await compiler.newTempDir();
+            const filters = {};
+            const files = [{
+                filename: 'example.pas',
+                contents: '{ hello\n   world }',
+            }];
+            const source = fs.readFileSync('test/pascal/prog.dpr').toString('utf8');
+
+            const writeSummary = await compiler.writeAllFiles(dirPath, source, files, filters);
+
+            return Promise.all([
+                writeSummary.inputFilename.should.equal(path.join(dirPath, 'prog.dpr')),
+                utils.fileExists(path.join(dirPath, 'example.pas')).should.eventually.equal(true),
+                utils.fileExists(path.join(dirPath, 'prog.dpr')).should.eventually.equal(true),
+            ]);
+        });
+    });
+
+    describe('Multifile writing behaviour Pascal-WIN', function () {
+        let compiler;
+
+        before(() => {
+            const ce = makeCompilationEnvironment({languages});
+            const info = {
+                exe: null,
+                remote: true,
+                lang: languages.pascal.id,
+            };
+    
+            compiler = new PascalWinCompiler(info, ce);
+        });
+    
+        it('Original behaviour (old unitname)', async function () {
+            const dirPath = await compiler.newTempDir();
+            const filters = {};
+            const files = [];
+            const source = fs.readFileSync('examples/pascal/default.pas').toString('utf8');
+
+            const writeSummary = await compiler.writeAllFiles(dirPath, source, files, filters);
+
+            return Promise.all([
+                writeSummary.inputFilename.should.equal(path.join(dirPath, 'output.pas')),
+                utils.fileExists(path.join(dirPath, 'output.pas')).should.eventually.equal(true),
+                utils.fileExists(path.join(dirPath, 'prog.dpr')).should.eventually.equal(false), // note: will be written somewhere else
+            ]);
+        });
+
+        it('Original behaviour (just a unit file)', async function () {
+            const dirPath = await compiler.newTempDir();
+            const filters = {};
+            const files = [];
+            const source = fs.readFileSync('test/pascal/example.pas').toString('utf8');
+
+            const writeSummary = await compiler.writeAllFiles(dirPath, source, files, filters);
+
+            return Promise.all([
+                writeSummary.inputFilename.should.equal(path.join(dirPath, 'example.pas')),
+                utils.fileExists(path.join(dirPath, 'example.pas')).should.eventually.equal(true),
+                utils.fileExists(path.join(dirPath, 'prog.dpr')).should.eventually.equal(false), // note: will be written somewhere else
+            ]);
+        });
+
+        it('Writing program instead of a unit', async function () {
+            const dirPath = await compiler.newTempDir();
+            const filters = {};
+            const files = [];
+            const source = fs.readFileSync('test/pascal/prog.dpr').toString('utf8');
+
+            const writeSummary = await compiler.writeAllFiles(dirPath, source, files, filters);
+
+            return Promise.all([
+                writeSummary.inputFilename.should.equal(path.join(dirPath, 'prog.dpr')),
+                utils.fileExists(path.join(dirPath, 'example.pas')).should.eventually.equal(false),
+                utils.fileExists(path.join(dirPath, 'prog.dpr')).should.eventually.equal(true),
+            ]);
+        });
+
+        it('Writing program with a unit', async function () {
+            const dirPath = await compiler.newTempDir();
+            const filters = {};
+            const files = [{
+                filename: 'example.pas',
+                contents: '{ hello\n   world }',
+            }];
+            const source = fs.readFileSync('test/pascal/prog.dpr').toString('utf8');
+
+            const writeSummary = await compiler.writeAllFiles(dirPath, source, files, filters);
+
+            return Promise.all([
+                writeSummary.inputFilename.should.equal(path.join(dirPath, 'prog.dpr')),
+                utils.fileExists(path.join(dirPath, 'example.pas')).should.eventually.equal(true),
+                utils.fileExists(path.join(dirPath, 'prog.dpr')).should.eventually.equal(true),
+            ]);
+        });
+    });
 });

test/pascal/example.pas

@@ -0,0 +1,18 @@
+unit example;
+
+interface
+
+type
+  TMyClass = class
+  public
+    procedure SomeProc;
+  end;
+
+implementation
+
+procedure TMyClass.SomeProc;
+begin
+  // hello
+end;
+
+end.

test/pascal/prog.dpr

@@ -0,0 +1,7 @@
+program prog;
+
+uses
+  example in 'example.pas';
+
+begin
+end.