Add method signature when report method not found (#8185)

Author: jpbempel

dd-java-agent/agent-debugger/src/main/java/com/datadog/debugger/agent/DebuggerTransformer.java

@@ -73,7 +73,7 @@
  */
 public class DebuggerTransformer implements ClassFileTransformer {
   private static final Logger log = LoggerFactory.getLogger(DebuggerTransformer.class);
-  private static final String CANNOT_FIND_METHOD = "Cannot find method %s::%s";
+  private static final String CANNOT_FIND_METHOD = "Cannot find method %s::%s%s";
   private static final String INSTRUMENTATION_FAILS = "Instrumentation fails for %s";
   private static final String CANNOT_FIND_LINE = "No executable code was found at %s:L%s";
   private static final Pattern COMMA_PATTERN = Pattern.compile(",");
@@ -536,20 +536,22 @@ private void handleInstrumentationResult(
   private void reportLocationNotFound(
       ProbeDefinition definition, String className, String methodName) {
     if (methodName != null) {
-      reportErrorForAllProbes(singletonList(definition), CANNOT_FIND_METHOD, className, methodName);
+      String signature = definition.getWhere().getSignature();
+      signature = signature == null ? "" : signature;
+      String msg = String.format(CANNOT_FIND_METHOD, className, methodName, signature);
+      reportErrorForAllProbes(singletonList(definition), msg);
       return;
     }
     // This is a line probe, so we don't report line not found because the line may be found later
     // on a separate class files because probe was set on an inner/top-level class
   }
 
   private void reportInstrumentationFails(List<ProbeDefinition> definitions, String className) {
-    reportErrorForAllProbes(definitions, INSTRUMENTATION_FAILS, className, null);
+    String msg = String.format(INSTRUMENTATION_FAILS, className);
+    reportErrorForAllProbes(definitions, msg);
   }
 
-  private void reportErrorForAllProbes(
-      List<ProbeDefinition> definitions, String format, String className, String location) {
-    String msg = String.format(format, className, location);
+  private void reportErrorForAllProbes(List<ProbeDefinition> definitions, String msg) {
     DiagnosticMessage diagnosticMessage = new DiagnosticMessage(DiagnosticMessage.Kind.ERROR, msg);
     for (ProbeDefinition definition : definitions) {
       addDiagnostics(definition, singletonList(diagnosticMessage));