New --no-source-mapping switch to disable line directives

cli/lfc/src/main/java/org/lflang/cli/Lfc.java

@@ -19,6 +19,7 @@
 import org.lflang.target.property.CompilerProperty;
 import org.lflang.target.property.LoggingProperty;
 import org.lflang.target.property.NoCompileProperty;
+import org.lflang.target.property.NoSourceMappingProperty;
 import org.lflang.target.property.PrintStatisticsProperty;
 import org.lflang.target.property.RuntimeVersionProperty;
 import org.lflang.target.property.SchedulerProperty;
@@ -146,6 +147,12 @@ public class Lfc extends CliBase {
       description = "Specify whether to enable run-time tracing (if supported).")
   private Boolean tracing;
 
+  @Option(
+      names = {"--no-source-mapping"},
+      arity = "0",
+      description = "Do not map lines in generated code to LF sources.")
+  private Boolean noSourceMapping;
+
   /** Mutually exclusive options related to threading. */
   static class ThreadingMutuallyExclusive {
     @Option(
@@ -374,6 +381,7 @@ public GeneratorArguments getArgs() {
             new Argument<>(LoggingProperty.INSTANCE, getLogging()),
             new Argument<>(PrintStatisticsProperty.INSTANCE, printStatistics),
             new Argument<>(NoCompileProperty.INSTANCE, noCompile),
+            new Argument<>(NoSourceMappingProperty.INSTANCE, noSourceMapping),
             new Argument<>(VerifyProperty.INSTANCE, verify),
             new Argument<>(RuntimeVersionProperty.INSTANCE, runtimeVersion),
             new Argument<>(SchedulerProperty.INSTANCE, getScheduler()),

core/src/main/java/org/lflang/generator/CodeBuilder.java

@@ -99,8 +99,12 @@ public void pr(CharSequence text) {
    * Print the #line compiler directive with the line number of the specified object.
    *
    * @param eObject The node.
+   * @param suppress Do nothing if true.
    */
-  public void prSourceLineNumber(EObject eObject) {
+  public void prSourceLineNumber(EObject eObject, boolean suppress) {
+    if (suppress) {
+      return;
+    }
     var node = NodeModelUtils.getNode(eObject);
     if (node != null) {
       // For code blocks (delimited by {= ... =}, unfortunately,
@@ -127,9 +131,13 @@ public void prSourceLineNumber(EObject eObject) {
     }
   }
 
-  /** Print a tag marking the end of a block corresponding to the source LF file. */
-  public void prEndSourceLineNumber() {
-    pr(END_SOURCE_LINE_NUMBER_TAG);
+  /**
+   * Print a tag marking the end of a block corresponding to the source LF file.
+   *
+   * @param suppress Do nothing if true.
+   */
+  public void prEndSourceLineNumber(boolean suppress) {
+    if (!suppress) pr(END_SOURCE_LINE_NUMBER_TAG);
   }
 
   /**

core/src/main/java/org/lflang/generator/c/CGenerator.java

@@ -94,6 +94,7 @@
 import org.lflang.target.property.FedSetupProperty;
 import org.lflang.target.property.LoggingProperty;
 import org.lflang.target.property.NoCompileProperty;
+import org.lflang.target.property.NoSourceMappingProperty;
 import org.lflang.target.property.PlatformProperty;
 import org.lflang.target.property.PlatformProperty.PlatformOption;
 import org.lflang.target.property.ProtobufsProperty;
@@ -985,10 +986,11 @@ private void generateReactorClassBody(
     // Some of the following methods create lines of code that need to
     // go into the constructor.  Collect those lines of code here:
     var constructorCode = new CodeBuilder();
+    var suppressLineDirectives = targetConfig.get(NoSourceMappingProperty.INSTANCE);
     generateAuxiliaryStructs(header, tpr, false);
     // The following must go before the self struct so the #include watchdog.h ends up in the
     // header.
-    CWatchdogGenerator.generateWatchdogs(src, header, tpr, messageReporter);
+    CWatchdogGenerator.generateWatchdogs(src, header, tpr, suppressLineDirectives, messageReporter);
     generateSelfStruct(header, tpr, constructorCode);
     generateMethods(src, tpr);
     generateReactions(src, tpr);
@@ -997,7 +999,8 @@ private void generateReactorClassBody(
 
   /** Generate methods for {@code reactor}. */
   protected void generateMethods(CodeBuilder src, TypeParameterizedReactor tpr) {
-    CMethodGenerator.generateMethods(tpr, src, types);
+    CMethodGenerator.generateMethods(
+        tpr, src, types, this.targetConfig.get(NoSourceMappingProperty.INSTANCE));
   }
 
   /**
@@ -1008,9 +1011,10 @@ protected void generateMethods(CodeBuilder src, TypeParameterizedReactor tpr) {
   protected void generateUserPreamblesForReactor(Reactor reactor, CodeBuilder src) {
     for (Preamble p : ASTUtils.allPreambles(reactor)) {
       src.pr("// *********** From the preamble, verbatim:");
-      src.prSourceLineNumber(p.getCode());
+      var suppressLineDirectives = this.targetConfig.get(NoSourceMappingProperty.INSTANCE);
+      src.prSourceLineNumber(p.getCode(), suppressLineDirectives);
       src.pr(toText(p.getCode()));
-      src.prEndSourceLineNumber();
+      src.prEndSourceLineNumber(suppressLineDirectives);
       src.pr("\n// *********** End of preamble.");
     }
   }
@@ -1082,7 +1086,7 @@ private void generateSelfStruct(
       CodeBuilder builder, TypeParameterizedReactor tpr, CodeBuilder constructorCode) {
     var reactor = toDefinition(tpr.reactor());
     var selfType = CUtil.selfType(tpr);
-
+    var suppressLineDirectives = this.targetConfig.get(NoSourceMappingProperty.INSTANCE);
     // Construct the typedef for the "self" struct.
     // Create a type name for the self struct.
     var body = new CodeBuilder();
@@ -1091,10 +1095,10 @@ private void generateSelfStruct(
     generateSelfStructExtension(body, reactor, constructorCode);
 
     // Next handle parameters.
-    body.pr(CParameterGenerator.generateDeclarations(tpr, types));
+    body.pr(CParameterGenerator.generateDeclarations(tpr, types, suppressLineDirectives));
 
     // Next handle states.
-    body.pr(CStateGenerator.generateDeclarations(tpr, types));
+    body.pr(CStateGenerator.generateDeclarations(tpr, types, suppressLineDirectives));
 
     // Next handle actions.
     CActionGenerator.generateDeclarations(tpr, body, constructorCode);

core/src/main/java/org/lflang/generator/c/CMethodGenerator.java

@@ -52,12 +52,15 @@ public static void generateMacroUndefsForMethods(Reactor reactor, CodeBuilder bo
    * @param method The method.
    * @param tpr The concrete reactor class.
    * @param types The C-specific type conversion functions.
+   * @param suppressLineDirectives Whether to suppress the generation of line directives.
    */
-  public static String generateMethod(Method method, TypeParameterizedReactor tpr, CTypes types) {
+  public static String generateMethod(
+      Method method, TypeParameterizedReactor tpr, CTypes types, boolean suppressLineDirectives) {
     var code = new CodeBuilder();
     var body = ASTUtils.toText(method.getCode());
 
-    code.prSourceLineNumber(method);
+    code.prSourceLineNumber(method, suppressLineDirectives);
+
     code.prComment("Implementation of method " + method.getName() + "()");
     code.pr(generateMethodSignature(method, tpr, types) + " {");
     code.indent();
@@ -76,12 +79,11 @@ public static String generateMethod(Method method, TypeParameterizedReactor tpr,
                   + "*)instance_args;"
                   + " SUPPRESS_UNUSED_WARNING(self);"));
     }
-
-    code.prSourceLineNumber(method.getCode());
+    code.prSourceLineNumber(method.getCode(), suppressLineDirectives);
     code.pr(body);
     code.unindent();
     code.pr("}");
-    code.prEndSourceLineNumber();
+    code.prEndSourceLineNumber(suppressLineDirectives);
     return code.toString();
   }
 
@@ -92,14 +94,19 @@ public static String generateMethod(Method method, TypeParameterizedReactor tpr,
    * @param tpr The reactor.
    * @param code The place to put the code.
    * @param types The C-specific type conversion functions.
+   * @param suppressLineDirectives Whether to suppress the generation of line directives.
    */
-  public static void generateMethods(TypeParameterizedReactor tpr, CodeBuilder code, CTypes types) {
+  public static void generateMethods(
+      TypeParameterizedReactor tpr,
+      CodeBuilder code,
+      CTypes types,
+      boolean suppressLineDirectives) {
     var reactor = tpr.reactor();
     code.prComment("***** Start of method declarations.");
     signatures(tpr, code, types);
     generateMacrosForMethods(tpr, code);
     for (Method method : allMethods(reactor)) {
-      code.pr(CMethodGenerator.generateMethod(method, tpr, types));
+      code.pr(CMethodGenerator.generateMethod(method, tpr, types, suppressLineDirectives));
     }
     generateMacroUndefsForMethods(reactor, code);
     code.prComment("***** End of method declarations.");

core/src/main/java/org/lflang/generator/c/CParameterGenerator.java

@@ -36,18 +36,20 @@ public static String getInitializer(ParameterInstance p) {
    *
    * @param reactor {@link TypeParameterizedReactor}
    * @param types A helper class for types
+   * @param suppressLineDirectives Whether to suppress the generation of line directives.
    */
-  public static String generateDeclarations(TypeParameterizedReactor reactor, CTypes types) {
+  public static String generateDeclarations(
+      TypeParameterizedReactor reactor, CTypes types, boolean suppressLineDirectives) {
     CodeBuilder code = new CodeBuilder();
     for (Parameter parameter : ASTUtils.allParameters(reactor.reactor())) {
-      code.prSourceLineNumber(parameter);
+      code.prSourceLineNumber(parameter, suppressLineDirectives);
       code.pr(
           types.getTargetType(reactor.resolveType(ASTUtils.getInferredType(parameter)))
               + " "
               + parameter.getName()
               + ";");
     }
-    code.prEndSourceLineNumber();
+    code.prEndSourceLineNumber(suppressLineDirectives);
     return code.toString();
   }
 }

core/src/main/java/org/lflang/generator/c/CReactionGenerator.java

@@ -33,6 +33,7 @@
 import org.lflang.lf.Variable;
 import org.lflang.lf.Watchdog;
 import org.lflang.target.TargetConfig;
+import org.lflang.target.property.NoSourceMappingProperty;
 import org.lflang.util.StringUtil;
 
 public class CReactionGenerator {
@@ -1121,6 +1122,7 @@ public static String generateReaction(
       boolean requiresType) {
     var code = new CodeBuilder();
     var body = ASTUtils.toText(getCode(types, reaction, tpr));
+    var suppressLineDirectives = targetConfig.get(NoSourceMappingProperty.INSTANCE);
     String init =
         generateInitializationForReaction(
             body, reaction, tpr, reactionIndex, types, messageReporter, mainDef, requiresType);
@@ -1132,14 +1134,18 @@ public static String generateReaction(
         generateFunction(
             generateReactionFunctionHeader(tpr, reactionIndex),
             init,
-            getCode(types, reaction, tpr)));
+            getCode(types, reaction, tpr),
+            suppressLineDirectives));
     // Now generate code for the late function, if there is one
     // Note that this function can only be defined on reactions
     // in federates that have inputs from a logical connection.
     if (reaction.getStp() != null) {
       code.pr(
           generateFunction(
-              generateStpFunctionHeader(tpr, reactionIndex), init, reaction.getStp().getCode()));
+              generateStpFunctionHeader(tpr, reactionIndex),
+              init,
+              reaction.getStp().getCode(),
+              suppressLineDirectives));
     }
 
     // Now generate code for the deadline violation function, if there is one.
@@ -1148,7 +1154,8 @@ public static String generateReaction(
           generateFunction(
               generateDeadlineFunctionHeader(tpr, reactionIndex),
               init,
-              reaction.getDeadline().getCode()));
+              reaction.getDeadline().getCode(),
+              suppressLineDirectives));
     }
     CMethodGenerator.generateMacroUndefsForMethods(tpr.reactor(), code);
     code.pr("#include " + StringUtil.addDoubleQuotes(CCoreFilesUtils.getCTargetSetUndefHeader()));
@@ -1168,14 +1175,15 @@ private static Code getCode(CTypes types, Reaction r, TypeParameterizedReactor t
     return ret;
   }
 
-  public static String generateFunction(String header, String init, Code code) {
+  public static String generateFunction(
+      String header, String init, Code code, boolean suppressLineDirectives) {
     var function = new CodeBuilder();
     function.pr(header + " {");
     function.indent();
     function.pr(init);
-    function.prSourceLineNumber(code);
+    function.prSourceLineNumber(code, suppressLineDirectives);
     function.pr(ASTUtils.toText(code));
-    function.prEndSourceLineNumber();
+    function.prEndSourceLineNumber(suppressLineDirectives);
     function.unindent();
     function.pr("}");
     return function.toString();

core/src/main/java/org/lflang/generator/c/CStateGenerator.java

@@ -12,18 +12,20 @@ public class CStateGenerator {
    *
    * @param reactor {@link TypeParameterizedReactor}
    * @param types A helper object for types
+   * @param suppressLineDirectives Whether to suppress the generation of line directives.
    */
-  public static String generateDeclarations(TypeParameterizedReactor reactor, CTypes types) {
+  public static String generateDeclarations(
+      TypeParameterizedReactor reactor, CTypes types, boolean suppressLineDirectives) {
     CodeBuilder code = new CodeBuilder();
     for (StateVar stateVar : ASTUtils.allStateVars(reactor.reactor())) {
-      code.prSourceLineNumber(stateVar);
+      code.prSourceLineNumber(stateVar, suppressLineDirectives);
       code.pr(
           types.getTargetType(reactor.resolveType(ASTUtils.getInferredType(stateVar)))
               + " "
               + stateVar.getName()
               + ";");
     }
-    code.prEndSourceLineNumber();
+    code.prEndSourceLineNumber(suppressLineDirectives);
     return code.toString();
   }
 

core/src/main/java/org/lflang/generator/c/CWatchdogGenerator.java

@@ -94,17 +94,19 @@ protected static int generateInitializeWatchdogs(CodeBuilder code, ReactorInstan
    *
    * @param src The place to put the code
    * @param header The place to put header code
+   * @param suppressLineDirectives Whether to suppress the generation of line directives.
    * @param tpr The reactor declaration
    */
   protected static void generateWatchdogs(
       CodeBuilder src,
       CodeBuilder header,
       TypeParameterizedReactor tpr,
+      boolean suppressLineDirectives,
       MessageReporter messageReporter) {
     if (hasWatchdogs(tpr.reactor())) {
       header.pr("#include \"core/threaded/watchdog.h\"");
       for (Watchdog watchdog : ASTUtils.allWatchdogs(tpr.reactor())) {
-        src.pr(generateWatchdogFunction(watchdog, tpr, messageReporter));
+        src.pr(generateWatchdogFunction(watchdog, tpr, messageReporter, suppressLineDirectives));
       }
     }
   }
@@ -253,29 +255,35 @@ private static String generateInitializationForWatchdog(
    * @param header function name and declaration.
    * @param init initialize variable.
    * @param watchdog The watchdog.
+   * @param suppressLineDirectives Whether to suppress the generation of line directives.
    */
-  private static String generateFunction(String header, String init, Watchdog watchdog) {
+  private static String generateFunction(
+      String header, String init, Watchdog watchdog, boolean suppressLineDirectives) {
     var function = new CodeBuilder();
     function.pr(header + " {");
     function.indent();
     function.pr(init);
     function.pr(
         "_lf_schedule(self->base.environment, (*" + watchdog.getName() + ").trigger, 0, NULL);");
-    function.prSourceLineNumber(watchdog.getCode());
+    function.prSourceLineNumber(watchdog.getCode(), suppressLineDirectives);
     function.pr(ASTUtils.toText(watchdog.getCode()));
-    function.prEndSourceLineNumber();
+    function.prEndSourceLineNumber(suppressLineDirectives);
     function.unindent();
     function.pr("}");
     return function.toString();
   }
 
   /** Generate the watchdog handler function. */
   private static String generateWatchdogFunction(
-      Watchdog watchdog, TypeParameterizedReactor tpr, MessageReporter messageReporter) {
+      Watchdog watchdog,
+      TypeParameterizedReactor tpr,
+      MessageReporter messageReporter,
+      boolean suppressLineDirectives) {
     return generateFunction(
         generateWatchdogFunctionHeader(watchdog, tpr),
         generateInitializationForWatchdog(watchdog, tpr, messageReporter),
-        watchdog);
+        watchdog,
+        suppressLineDirectives);
   }
 
   /**

core/src/main/java/org/lflang/target/Target.java

@@ -46,6 +46,7 @@
 import org.lflang.target.property.FilesProperty;
 import org.lflang.target.property.KeepaliveProperty;
 import org.lflang.target.property.NoRuntimeValidationProperty;
+import org.lflang.target.property.NoSourceMappingProperty;
 import org.lflang.target.property.PlatformProperty;
 import org.lflang.target.property.PrintStatisticsProperty;
 import org.lflang.target.property.ProtobufsProperty;
@@ -598,6 +599,7 @@ public void initialize(TargetConfig config) {
           DockerProperty.INSTANCE,
           FilesProperty.INSTANCE,
           KeepaliveProperty.INSTANCE,
+          NoSourceMappingProperty.INSTANCE,
           PlatformProperty.INSTANCE,
           ProtobufsProperty.INSTANCE,
           SchedulerProperty.INSTANCE,
@@ -631,6 +633,7 @@ public void initialize(TargetConfig config) {
           DockerProperty.INSTANCE,
           FilesProperty.INSTANCE,
           KeepaliveProperty.INSTANCE,
+          NoSourceMappingProperty.INSTANCE,
           ProtobufsProperty.INSTANCE,
           SchedulerProperty.INSTANCE,
           SingleThreadedProperty.INSTANCE,

core/src/main/java/org/lflang/target/property/NoSourceMappingProperty.java

@@ -0,0 +1,17 @@
+package org.lflang.target.property;
+
+/** Directive to instruct the code generator to not produce line directives. */
+public final class NoSourceMappingProperty extends BooleanProperty {
+
+  /** Singleton target property instance. */
+  public static final NoSourceMappingProperty INSTANCE = new NoSourceMappingProperty();
+
+  private NoSourceMappingProperty() {
+    super();
+  }
+
+  @Override
+  public String name() {
+    return "no-source-mapping";
+  }
+}