fix : Can now extract a stack starting at any point

Author: LeoDefossez

src/main/java/org/jdiextractor/core/AbstractExtractor.java

@@ -111,8 +111,8 @@ protected void createTracePopulator() {
 	 * @return the thread where the execution to extract takes place
 	 */
 	protected ThreadReference getThread() {
-		// WARNING: We assume the thread name matches 'entryMethod' (usually "main")
-		return this.getThreadNamed(config.getEntrypoint().getMethodName());
+		// WARNING: We assume the thread name matches "main"
+		return this.getThreadNamed("main");
 	}
 
 	/**

src/main/java/org/jdiextractor/core/CallStackSnapshotExtractor.java

@@ -18,20 +18,21 @@
  */
 public class CallStackSnapshotExtractor extends AbstractExtractor<CallStackSnapshotExtractorConfig> {
 
-
 	public CallStackSnapshotExtractor() {
 		super(false);
 	}
 
 	@Override
 	protected void executeExtraction() {
 		try {
-			// wait for the breakpoint
-			this.waitForBreakpoint();
+			this.processEventsUntil(config.getEntrypoint());
+			int startFrame = this.getThread().frameCount();
+
+			this.processEventsUntil(config.getEndpoint());
 
 			// Extract all frames
 			List<StackFrame> frames = this.getThread().frames();
-			for (int i = frames.size() - 1; i >= 0; i--) {
+			for (int i = frames.size() - startFrame - 1; i >= 0; i--) {
 				StackFrame next = frames.get(i);
 				this.createMethodWith(next);
 			}
@@ -44,12 +45,6 @@ protected void executeExtraction() {
 		}
 	}
 
-
-
-	private void waitForBreakpoint() throws IncompatibleThreadStateException {
-		this.processEventsUntil(config.getEndpoint());
-	}
-
 	@Override
 	protected void reactToStepEvent(StepEvent event) {
 		// Nothing, should not happen in this scenario
@@ -60,5 +55,4 @@ protected void reactToMethodEntryEvent(MethodEntryEvent event) {
 		// Nothing, should not happen in this scenario
 	}
 
-
 }