Merge pull request #7054 from atorralba/atorralba/promote-log-injection

Java: Promote Log Injection from experimental

java/ql/lib/semmle/code/java/dataflow/ExternalFlow.qll

@@ -95,6 +95,7 @@ private module Frameworks {
   private import semmle.code.java.frameworks.JaxWS
   private import semmle.code.java.frameworks.JoddJson
   private import semmle.code.java.frameworks.JsonJava
+  private import semmle.code.java.frameworks.Logging
   private import semmle.code.java.frameworks.Objects
   private import semmle.code.java.frameworks.Optional
   private import semmle.code.java.frameworks.Stream

java/ql/lib/semmle/code/java/frameworks/Logging.qll

@@ -0,0 +1,329 @@
+/** Provides classes and predicates to reason about logging. */
+
+import java
+import semmle.code.java.dataflow.ExternalFlow
+
+private class LoggingSummaryModels extends SummaryModelCsv {
+  override predicate row(string row) {
+    row =
+      [
+        "org.apache.logging.log4j;Logger;true;traceEntry;(Message);;Argument[0];ReturnValue;taint",
+        "org.apache.logging.log4j;Logger;true;traceEntry;(String,Object[]);;Argument[0..1];ReturnValue;taint",
+        "org.apache.logging.log4j;Logger;true;traceEntry;(String,Supplier[]);;Argument[0..1];ReturnValue;taint",
+        "org.apache.logging.log4j;Logger;true;traceEntry;(Supplier[]);;Argument[0];ReturnValue;taint",
+        "org.apache.logging.log4j;Logger;true;traceExit;(EntryMessage,Object);;Argument[1];ReturnValue;value",
+        "org.apache.logging.log4j;Logger;true;traceExit;(Message,Object);;Argument[1];ReturnValue;value",
+        "org.apache.logging.log4j;Logger;true;traceExit;(Object);;Argument[0];ReturnValue;value",
+        "org.apache.logging.log4j;Logger;true;traceExit;(String,Object);;Argument[1];ReturnValue;value",
+        "org.slf4j.spi;LoggingEventBuilder;true;addArgument;;;Argument[1];Argument[-1];taint",
+        "org.slf4j.spi;LoggingEventBuilder;true;addArgument;;;Argument[-1];ReturnValue;value",
+        "org.slf4j.spi;LoggingEventBuilder;true;addKeyValue;;;Argument[1];Argument[-1];taint",
+        "org.slf4j.spi;LoggingEventBuilder;true;addKeyValue;;;Argument[-1];ReturnValue;value",
+        "org.slf4j.spi;LoggingEventBuilder;true;addMarker;;;Argument[-1];ReturnValue;value",
+        "org.slf4j.spi;LoggingEventBuilder;true;setCause;;;Argument[-1];ReturnValue;value",
+        "java.util.logging;LogRecord;false;LogRecord;;;Argument[1];Argument[-1];taint"
+      ]
+  }
+}
+
+private string jBossLogger() { result = "org.jboss.logging;" + ["BasicLogger", "Logger"] }
+
+private class LoggingSinkModels extends SinkModelCsv {
+  override predicate row(string row) {
+    row =
+      [
+        // org.apache.log4j.Category
+        "org.apache.log4j;Category;true;assertLog;;;Argument[1];logging",
+        "org.apache.log4j;Category;true;debug;;;Argument[0];logging",
+        "org.apache.log4j;Category;true;error;;;Argument[0];logging",
+        "org.apache.log4j;Category;true;fatal;;;Argument[0];logging",
+        "org.apache.log4j;Category;true;forcedLog;;;Argument[2];logging",
+        "org.apache.log4j;Category;true;info;;;Argument[0];logging",
+        "org.apache.log4j;Category;true;l7dlog;(Priority,String,Object[],Throwable);;Argument[2];logging",
+        "org.apache.log4j;Category;true;log;(Priority,Object);;Argument[1];logging",
+        "org.apache.log4j;Category;true;log;(Priority,Object,Throwable);;Argument[1];logging",
+        "org.apache.log4j;Category;true;log;(String,Priority,Object,Throwable);;Argument[2];logging",
+        "org.apache.log4j;Category;true;warn;;;Argument[0];logging",
+        // org.apache.logging.log4j.Logger
+        "org.apache.logging.log4j;Logger;true;" +
+          ["debug", "error", "fatal", "info", "trace", "warn"] +
+          [
+            ";(CharSequence);;Argument[0];logging",
+            ";(CharSequence,Throwable);;Argument[0];logging",
+            ";(Marker,CharSequence);;Argument[1];logging",
+            ";(Marker,CharSequence,Throwable);;Argument[1];logging",
+            ";(Marker,Message);;Argument[1];logging",
+            ";(Marker,MessageSupplier);;Argument[1];logging",
+            ";(Marker,MessageSupplier);;Argument[1];logging",
+            ";(Marker,MessageSupplier,Throwable);;Argument[1];logging",
+            ";(Marker,Object);;Argument[1];logging",
+            ";(Marker,Object,Throwable);;Argument[1];logging",
+            ";(Marker,String);;Argument[1];logging",
+            ";(Marker,String,Object[]);;Argument[1..2];logging",
+            ";(Marker,String,Object);;Argument[1..2];logging",
+            ";(Marker,String,Object,Object);;Argument[1..3];logging",
+            ";(Marker,String,Object,Object,Object);;Argument[1..4];logging",
+            ";(Marker,String,Object,Object,Object,Object);;Argument[1..5];logging",
+            ";(Marker,String,Object,Object,Object,Object,Object);;Argument[1..6];logging",
+            ";(Marker,String,Object,Object,Object,Object,Object,Object);;Argument[1..7];logging",
+            ";(Marker,String,Object,Object,Object,Object,Object,Object,Object);;Argument[1..8];logging",
+            ";(Marker,String,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[1..9];logging",
+            ";(Marker,String,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[1..10];logging",
+            ";(Marker,String,Object,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[1..11];logging",
+            ";(Marker,String,Supplier);;Argument[1..2];logging",
+            ";(Marker,String,Throwable);;Argument[1];logging",
+            ";(Marker,Supplier);;Argument[1];logging",
+            ";(Marker,Supplier,Throwable);;Argument[1];logging",
+            ";(MessageSupplier);;Argument[0];logging",
+            ";(MessageSupplier,Throwable);;Argument[0];logging", ";(Message);;Argument[0];logging",
+            ";(Message,Throwable);;Argument[0];logging", ";(Object);;Argument[0];logging",
+            ";(Object,Throwable);;Argument[0];logging", ";(String);;Argument[0];logging",
+            ";(String,Object[]);;Argument[0..1];logging",
+            ";(String,Object);;Argument[0..1];logging",
+            ";(String,Object,Object);;Argument[0..2];logging",
+            ";(String,Object,Object,Object);;Argument[0..3];logging",
+            ";(String,Object,Object,Object,Object);;Argument[0..4];logging",
+            ";(String,Object,Object,Object,Object,Object);;Argument[0..5];logging",
+            ";(String,Object,Object,Object,Object,Object,Object);;Argument[0..6];logging",
+            ";(String,Object,Object,Object,Object,Object,Object,Object);;Argument[0..7];logging",
+            ";(String,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[0..8];logging",
+            ";(String,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[0..9];logging",
+            ";(String,Object,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[0..10];logging",
+            ";(String,Supplier);;Argument[0..1];logging",
+            ";(String,Throwable);;Argument[0];logging", ";(Supplier);;Argument[0];logging",
+            ";(Supplier,Throwable);;Argument[0];logging"
+          ],
+        "org.apache.logging.log4j;Logger;true;log" +
+          [
+            ";(Level,CharSequence);;Argument[1];logging",
+            ";(Level,CharSequence,Throwable);;Argument[1];logging",
+            ";(Level,Marker,CharSequence);;Argument[2];logging",
+            ";(Level,Marker,CharSequence,Throwable);;Argument[2];logging",
+            ";(Level,Marker,Message);;Argument[2];logging",
+            ";(Level,Marker,MessageSupplier);;Argument[2];logging",
+            ";(Level,Marker,MessageSupplier);;Argument[2];logging",
+            ";(Level,Marker,MessageSupplier,Throwable);;Argument[2];logging",
+            ";(Level,Marker,Object);;Argument[2];logging",
+            ";(Level,Marker,Object,Throwable);;Argument[2];logging",
+            ";(Level,Marker,String);;Argument[2];logging",
+            ";(Level,Marker,String,Object[]);;Argument[2..3];logging",
+            ";(Level,Marker,String,Object);;Argument[2..3];logging",
+            ";(Level,Marker,String,Object,Object);;Argument[2..4];logging",
+            ";(Level,Marker,String,Object,Object,Object);;Argument[2..5];logging",
+            ";(Level,Marker,String,Object,Object,Object,Object);;Argument[2..6];logging",
+            ";(Level,Marker,String,Object,Object,Object,Object,Object);;Argument[2..7];logging",
+            ";(Level,Marker,String,Object,Object,Object,Object,Object,Object);;Argument[2..8];logging",
+            ";(Level,Marker,String,Object,Object,Object,Object,Object,Object,Object);;Argument[2..9];logging",
+            ";(Level,Marker,String,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[2..10];logging",
+            ";(Level,Marker,String,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[2..11];logging",
+            ";(Level,Marker,String,Object,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[2..12];logging",
+            ";(Level,Marker,String,Supplier);;Argument[2..3];logging",
+            ";(Level,Marker,String,Throwable);;Argument[2];logging",
+            ";(Level,Marker,Supplier);;Argument[2];logging",
+            ";(Level,Marker,Supplier,Throwable);;Argument[2];logging",
+            ";(Level,Message);;Argument[1];logging",
+            ";(Level,MessageSupplier);;Argument[1];logging",
+            ";(Level,MessageSupplier,Throwable);;Argument[1];logging",
+            ";(Level,Message);;Argument[1];logging",
+            ";(Level,Message,Throwable);;Argument[1];logging",
+            ";(Level,Object);;Argument[1];logging", ";(Level,Object);;Argument[1];logging",
+            ";(Level,String);;Argument[1];logging",
+            ";(Level,Object,Throwable);;Argument[1];logging",
+            ";(Level,String);;Argument[1];logging",
+            ";(Level,String,Object[]);;Argument[1..2];logging",
+            ";(Level,String,Object);;Argument[1..2];logging",
+            ";(Level,String,Object,Object);;Argument[1..3];logging",
+            ";(Level,String,Object,Object,Object);;Argument[1..4];logging",
+            ";(Level,String,Object,Object,Object,Object);;Argument[1..5];logging",
+            ";(Level,String,Object,Object,Object,Object,Object);;Argument[1..6];logging",
+            ";(Level,String,Object,Object,Object,Object,Object,Object);;Argument[1..7];logging",
+            ";(Level,String,Object,Object,Object,Object,Object,Object,Object);;Argument[1..8];logging",
+            ";(Level,String,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[1..9];logging",
+            ";(Level,String,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[1..10];logging",
+            ";(Level,String,Object,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[1..11];logging",
+            ";(Level,String,Supplier);;Argument[1..2];logging",
+            ";(Level,String,Throwable);;Argument[1];logging",
+            ";(Level,Supplier);;Argument[1];logging",
+            ";(Level,Supplier,Throwable);;Argument[1];logging"
+          ], "org.apache.logging.log4j;Logger;true;entry;(Object[]);;Argument[0];logging",
+        "org.apache.logging.log4j;Logger;true;logMessage;(Level,Marker,String,StackTraceElement,Message,Throwable);;Argument[4];logging",
+        "org.apache.logging.log4j;Logger;true;printf;(Level,Marker,String,Object[]);;Argument[2..3];logging",
+        "org.apache.logging.log4j;Logger;true;printf;(Level,String,Object[]);;Argument[1..2];logging",
+        "org.apache.logging.log4j;Logger;true;traceEntry;(Message);;Argument[0];logging",
+        "org.apache.logging.log4j;Logger;true;traceEntry;(String,Object[]);;Argument[0..1];logging",
+        "org.apache.logging.log4j;Logger;true;traceEntry;(String,Supplier[]);;Argument[0..1];logging",
+        "org.apache.logging.log4j;Logger;true;traceEntry;(Supplier[]);;Argument[0];logging",
+        "org.apache.logging.log4j;Logger;true;traceExit;(EntryMessage);;Argument[0];logging",
+        "org.apache.logging.log4j;Logger;true;traceExit;(EntryMessage,Object);;Argument[0..1];logging",
+        "org.apache.logging.log4j;Logger;true;traceExit;(Message,Object);;Argument[0..1];logging",
+        "org.apache.logging.log4j;Logger;true;traceExit;(Object);;Argument[0];logging",
+        "org.apache.logging.log4j;Logger;true;traceExit;(String,Object);;Argument[0..1];logging",
+        // org.apache.logging.log4j.LogBuilder
+        "org.apache.logging.log4j;LogBuilder;true;log;(CharSequence);;Argument[0];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(Message);;Argument[0];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(Object);;Argument[0];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String);;Argument[0];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Object[]);;Argument[0..1];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Object);;Argument[0..1];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Object,Object);;Argument[0..2];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Object,Object,Object);;Argument[0..3];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Object,Object,Object,Object);;Argument[0..4];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Object,Object,Object,Object,Object);;Argument[0..5];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Object,Object,Object,Object,Object,Object);;Argument[0..6];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Object,Object,Object,Object,Object,Object,Object);;Argument[0..7];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[0..8];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[0..9];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Object,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[0..10];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(String,Supplier);;Argument[0..1];logging",
+        "org.apache.logging.log4j;LogBuilder;true;log;(Supplier);;Argument[0];logging",
+        // org.apache.commons.logging.Log
+        "org.apache.commons.logging;Log;true;" +
+          ["debug", "error", "fatal", "info", "trace", "warn"] + ";;;Argument[0];logging",
+        // org.jboss.logging.BasicLogger and org.jboss.logging.Logger
+        // (org.jboss.logging.Logger does not implement BasicLogger in some implementations like JBoss Application Server 4.0.4)
+        jBossLogger() + ";true;" + ["debug", "error", "fatal", "info", "trace", "warn"] +
+          [
+            ";(Object);;Argument[0];logging", ";(Object,Throwable);;Argument[0];logging",
+            ";(Object,Object[]);;Argument[0..1];logging",
+            ";(Object,Object[],Throwable);;Argument[0..1];logging",
+            ";(String,Object,Object[],Throwable);;Argument[1..2];logging",
+            ";(String,Object,Throwable);;Argument[1];logging"
+          ],
+        jBossLogger() + ";true;log" +
+          [
+            ";(Level,Object);;Argument[1];logging",
+            ";(Level,Object,Object[]);;Argument[1..2];logging",
+            ";(Level,Object,Object[],Throwable);;Argument[1..2];logging",
+            ";(Level,Object,Throwable);;Argument[1];logging",
+            ";(Level,String,Object,Throwable);;Argument[2];logging",
+            ";(String,Level,Object,Object[],Throwable);;Argument[2..3];logging"
+          ],
+        jBossLogger() + ";true;" + ["debug", "error", "fatal", "info", "trace", "warn"] + ["f", "v"]
+          +
+          [
+            ";(String,Object[]);;Argument[0..1];logging",
+            ";(String,Object);;Argument[0..1];logging",
+            ";(String,Object,Object);;Argument[0..2];logging",
+            ";(String,Object,Object,Object);;Argument[0..3];logging",
+            ";(String,Object,Object,Object,Object);;Argument[0..4];logging",
+            ";(Throwable,String,Object);;Argument[1..2];logging",
+            ";(Throwable,String,Object,Object);;Argument[1..3];logging",
+            ";(Throwable,String,Object,Object,Object);;Argument[0..4];logging"
+          ],
+        jBossLogger() + ";true;log" + ["f", "v"] +
+          [
+            ";(Level,String,Object[]);;Argument[1..2];logging",
+            ";(Level,String,Object);;Argument[1..2];logging",
+            ";(Level,String,Object,Object);;Argument[1..3];logging",
+            ";(Level,String,Object,Object,Object);;Argument[1..4];logging",
+            ";(Level,String,Object,Object,Object,Object);;Argument[1..5];logging",
+            ";(Level,Throwable,String,Object);;Argument[2..3];logging",
+            ";(Level,Throwable,String,Object,Object);;Argument[2..4];logging",
+            ";(Level,Throwable,String,Object,Object,Object);;Argument[1..5];logging",
+            ";(String,Level,Throwable,String,Object[]);;Argument[3..4];logging",
+            ";(String,Level,Throwable,String,Object);;Argument[3..4];logging",
+            ";(String,Level,Throwable,String,Object,Object);;Argument[3..5];logging",
+            ";(String,Level,Throwable,String,Object,Object,Object);;Argument[3..6];logging"
+          ],
+        // org.slf4j.spi.LoggingEventBuilder
+        "org.slf4j.spi;LoggingEventBuilder;true;log;;;Argument[0];logging",
+        "org.slf4j.spi;LoggingEventBuilder;true;log;(String,Object);;Argument[0..1];logging",
+        "org.slf4j.spi;LoggingEventBuilder;true;log;(String,Object[]);;Argument[0..1];logging",
+        "org.slf4j.spi;LoggingEventBuilder;true;log;(String,Object,Object);;Argument[0..2];logging",
+        "org.slf4j.spi;LoggingEventBuilder;true;log;(Supplier);;Argument[0];logging",
+        // org.slf4j.Logger
+        "org.slf4j;Logger;true;" + ["debug", "error", "info", "trace", "warn"] +
+          [
+            ";(String);;Argument[0];logging", ";(String,Object);;Argument[0..1];logging",
+            ";(String,Object[]);;Argument[0..1];logging",
+            ";(String,Object,Object);;Argument[0..2];logging",
+            ";(String,Throwable);;Argument[0];logging", ";(Marker,String);;Argument[1];logging",
+            ";(Marker,String,Object);;Argument[1..2];logging",
+            ";(Marker,String,Object[]);;Argument[1..2];logging",
+            ";(Marker,String,Object,Object);;Argument[1..3];logging",
+            ";(Marker,String,Object,Object,Object);;Argument[1..4];logging"
+          ],
+        // org.scijava.Logger
+        "org.scijava.log;Logger;true;alwaysLog;(int,Object,Throwable);;Argument[1];logging",
+        "org.scijava.log;Logger;true;" + ["debug", "error", "info", "trace", "warn"] +
+          [";(Object);;Argument[0];logging", ";(Object,Throwable);;Argument[0];logging"],
+        "org.scijava.log;Logger;true;log;(int,Object);;Argument[1];logging",
+        "org.scijava.log;Logger;true;log;(int,Object,Throwable);;Argument[1];logging",
+        // com.google.common.flogger.LoggingApi
+        "com.google.common.flogger;LoggingApi;true;logVarargs;;;Argument[0..1];logging",
+        "com.google.common.flogger;LoggingApi;true;log" +
+          [
+            ";;;Argument[0];logging", ";(String,Object);;Argument[1];logging",
+            ";(String,Object,Object);;Argument[1..2];logging",
+            ";(String,Object,Object,Object);;Argument[1..3];logging",
+            ";(String,Object,Object,Object,Object);;Argument[1..4];logging",
+            ";(String,Object,Object,Object,Object,Object);;Argument[1..5];logging",
+            ";(String,Object,Object,Object,Object,Object,Object);;Argument[1..6];logging",
+            ";(String,Object,Object,Object,Object,Object,Object,Object);;Argument[1..7];logging",
+            ";(String,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[1..8];logging",
+            ";(String,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[1..9];logging",
+            ";(String,Object,Object,Object,Object,Object,Object,Object,Object,Object,Object);;Argument[1..10];logging",
+            ";(String,Object,Object,Object,Object,Object,Object,Object,Object,Object,Object,Object[]);;Argument[1..11];logging",
+            ";(String,Object,boolean);;Argument[1];logging",
+            ";(String,Object,char);;Argument[1];logging",
+            ";(String,Object,byte);;Argument[1];logging",
+            ";(String,Object,short);;Argument[1];logging",
+            ";(String,Object,int);;Argument[1];logging",
+            ";(String,Object,long);;Argument[1];logging",
+            ";(String,Object,float);;Argument[1];logging",
+            ";(String,Object,double);;Argument[1];logging",
+            ";(String,boolean,Object);;Argument[2];logging",
+            ";(String,char,Object);;Argument[2];logging",
+            ";(String,byte,Object);;Argument[2];logging",
+            ";(String,short,Object);;Argument[2];logging",
+            ";(String,int,Object);;Argument[2];logging",
+            ";(String,long,Object);;Argument[2];logging",
+            ";(String,float,Object);;Argument[2];logging",
+            ";(String,double,Object);;Argument[2];logging"
+          ],
+        // java.lang.System$Logger
+        "java.lang;System$Logger;true;log;" +
+          [
+            "(Level,Object);;Argument[1]", "(Level,String);;Argument[1]",
+            "(Level,String,Object[]);;Argument[1..2]", "(Level,String,Throwable);;Argument[1]",
+            "(Level,String,Supplier);;Argument[1..2]",
+            "(Level,String,Supplier,Throwable);;Argument[1..2]",
+            "(Level,ResourceBundle,String,Object[]);;Argument[2..3]",
+            "(Level,ResourceBundle,String,Throwable);;Argument[2]"
+          ] + ";logging",
+        // java.util.logging.Logger
+        "java.util.logging;Logger;true;" +
+          ["config", "fine", "finer", "finest", "info", "severe", "warning"] +
+          ";;;Argument[0];logging",
+        "java.util.logging;Logger;true;entering;(String,String);;Argument[0..1];logging",
+        "java.util.logging;Logger;true;entering;(String,String,Object);;Argument[0..2];logging",
+        "java.util.logging;Logger;true;entering;(String,String,Object[]);;Argument[0..2];logging",
+        "java.util.logging;Logger;true;exiting;(String,String);;Argument[0..1];logging",
+        "java.util.logging;Logger;true;exiting;(String,String,Object);;Argument[0..2];logging",
+        "java.util.logging;Logger;true;log;(Level,String);;Argument[1];logging",
+        "java.util.logging;Logger;true;log;(Level,String,Object);;Argument[1..2];logging",
+        "java.util.logging;Logger;true;log;(Level,String,Object[]);;Argument[1..2];logging",
+        "java.util.logging;Logger;true;log;(Level,String,Throwable);;Argument[1];logging",
+        "java.util.logging;Logger;true;log;(Level,Supplier);;Argument[1];logging",
+        "java.util.logging;Logger;true;log;(Level,Throwable,Supplier);;Argument[2];logging",
+        "java.util.logging;Logger;true;log;(LogRecord);;Argument[0];logging",
+        "java.util.logging;Logger;true;logp;(Level,String,String,String);;Argument[1..3];logging",
+        "java.util.logging;Logger;true;logp;(Level,String,String,String,Object);;Argument[1..4];logging",
+        "java.util.logging;Logger;true;logp;(Level,String,String,String,Object[]);;Argument[1..4];logging",
+        "java.util.logging;Logger;true;logp;(Level,String,String,String,Throwable);;Argument[1..3];logging",
+        "java.util.logging;Logger;true;logp;(Level,String,String,Supplier);;Argument[1..3];logging",
+        "java.util.logging;Logger;true;logp;(Level,String,String,Throwable,Supplier);;Argument[1..2];logging",
+        "java.util.logging;Logger;true;logp;(Level,String,String,Throwable,Supplier);;Argument[4];logging",
+        "java.util.logging;Logger;true;logrb;(Level,String,String,ResourceBundle,String,Object[]);;Argument[1..2];logging",
+        "java.util.logging;Logger;true;logrb;(Level,String,String,ResourceBundle,String,Object[]);;Argument[4..5];logging",
+        "java.util.logging;Logger;true;logrb;(Level,String,String,ResourceBundle,String,Throwable);;Argument[1..2];logging",
+        "java.util.logging;Logger;true;logrb;(Level,String,String,ResourceBundle,String,Throwable);;Argument[4];logging",
+        "java.util.logging;Logger;true;logrb;(Level,String,String,String,String);;Argument[1..4];logging",
+        "java.util.logging;Logger;true;logrb;(Level,String,String,String,String,Object);;Argument[1..5];logging",
+        "java.util.logging;Logger;true;logrb;(Level,String,String,String,String,Object[]);;Argument[1..5];logging",
+        "java.util.logging;Logger;true;logrb;(Level,String,String,String,String,Throwable);;Argument[1..4];logging",
+        // android.util.Log
+        "android.util;Log;true;" + ["d", "v", "i", "w", "e", "wtf"] + ";;;Argument[1];logging"
+      ]
+  }
+}

java/ql/lib/semmle/code/java/security/LogInjection.qll

@@ -0,0 +1,36 @@
+/** Provides classes and predicates related to Log Injection vulnerabilities. */
+
+import java
+import semmle.code.java.dataflow.DataFlow
+import semmle.code.java.dataflow.ExternalFlow
+
+/** A data flow sink for unvalidated user input that is used to log messages. */
+abstract class LogInjectionSink extends DataFlow::Node { }
+
+/**
+ * A node that sanitizes a message before logging to avoid log injection.
+ */
+abstract class LogInjectionSanitizer extends DataFlow::Node { }
+
+/**
+ * A unit class for adding additional taint steps.
+ *
+ * Extend this class to add additional taint steps that should apply to the `LogInjectionConfiguration`.
+ */
+class LogInjectionAdditionalTaintStep extends Unit {
+  /**
+   * Holds if the step from `node1` to `node2` should be considered a taint
+   * step for the `LogInjectionConfiguration` configuration.
+   */
+  abstract predicate step(DataFlow::Node node1, DataFlow::Node node2);
+}
+
+private class DefaultLogInjectionSink extends LogInjectionSink {
+  DefaultLogInjectionSink() { sinkNode(this, "logging") }
+}
+
+private class DefaultLogInjectionSanitizer extends LogInjectionSanitizer {
+  DefaultLogInjectionSanitizer() {
+    this.getType() instanceof BoxedType or this.getType() instanceof PrimitiveType
+  }
+}

java/ql/lib/semmle/code/java/security/LogInjectionQuery.qll

@@ -0,0 +1,22 @@
+/** Provides taint tracking configurations to be used in queries related to the Log Injection vulnerability. */
+
+import java
+import semmle.code.java.dataflow.FlowSources
+import semmle.code.java.security.LogInjection
+
+/**
+ * A taint-tracking configuration for tracking untrusted user input used in log entries.
+ */
+class LogInjectionConfiguration extends TaintTracking::Configuration {
+  LogInjectionConfiguration() { this = "LogInjectionConfiguration" }
+
+  override predicate isSource(DataFlow::Node source) { source instanceof RemoteFlowSource }
+
+  override predicate isSink(DataFlow::Node sink) { sink instanceof LogInjectionSink }
+
+  override predicate isSanitizer(DataFlow::Node node) { node instanceof LogInjectionSanitizer }
+
+  override predicate isAdditionalTaintStep(DataFlow::Node node1, DataFlow::Node node2) {
+    any(LogInjectionAdditionalTaintStep c).step(node1, node2)
+  }
+}

java/ql/src/Security/CWE/CWE-117/LogInjection.qhelp

@@ -29,16 +29,15 @@ other forms of HTML injection.
 </recommendation>
 
 <example>
-  <p>In the example, a username, provided by the user, is logged using <code>logger.warn</code> (from  <code>org.slf4j.Logger</code>). 
+  <p>In the first example, a username, provided by the user, is logged using <code>logger.warn</code> (from  <code>org.slf4j.Logger</code>). 
     In the first case (<code>/bad</code> endpoint), the username is logged without any sanitization.
     If a malicious user provides <code>Guest'%0AUser:'Admin</code> as a username parameter, 
     the log entry will be split into two separate lines, where the first line will be <code>User:'Guest'</code> and the second one will be <code>User:'Admin'</code>.
 </p>
 <sample src="LogInjectionBad.java" />
 
-<p> In the second case (<code>/good</code> endpoint), <code>matches()</code> is used to ensure the user input only has alphanumeric characters.
+<p> In the second example (<code>/good</code> endpoint), <code>matches()</code> is used to ensure the user input only has alphanumeric characters.
-  If a malicious user provides `Guest'%0AUser:'Admin` as a username parameter, 
+  If a malicious user provides `Guest'%0AUser:'Admin` as a username parameter, the log entry will not be logged at all, preventing the injection.</p>
-  the log entry will not be split into two separate lines, resulting in a single line <code>User:'Guest'User:'Admin'</code>.</p>
 
 <sample src="LogInjectionGood.java" />
 </example>

java/ql/src/Security/CWE/CWE-117/LogInjection.ql

@@ -0,0 +1,21 @@
+/**
+ * @name Log Injection
+ * @description Building log entries from user-controlled data may allow
+ *              insertion of forged log entries by malicious users.
+ * @kind path-problem
+ * @problem.severity error
+ * @security-severity 7.8
+ * @precision medium
+ * @id java/log-injection
+ * @tags security
+ *       external/cwe/cwe-117
+ */
+
+import java
+import semmle.code.java.security.LogInjectionQuery
+import DataFlow::PathGraph
+
+from LogInjectionConfiguration cfg, DataFlow::PathNode source, DataFlow::PathNode sink
+where cfg.hasFlowPath(source, sink)
+select sink.getNode(), source, sink, "This $@ flows to a log entry.", source.getNode(),
+  "user-provided value"

java/ql/src/Security/CWE/CWE-117/LogInjectionGood.java

@@ -16,7 +16,7 @@ public class LogInjection {
     public String good(@RequestParam(value = "username", defaultValue = "name") String username) {
         // The regex check here, allows only alphanumeric characters to pass.
         // Hence, does not result in log injection
-        if (username.matches("\w*")) {
+        if (username.matches("\\w*")) {
             log.warn("User:'{}'", username);
 
             return username;

java/ql/src/change-notes/2021-11-04-log-injection-query.md

@@ -0,0 +1,4 @@
+---
+category: newQuery
+---
+* The query "Log Injection" (`java/log-injection`) has been promoted from experimental to the main query pack. Its results will now appear by default. The query was originally [submitted as an experimental query by @porcupineyhairs and @dellalibera](https://github.com/github/codeql/pull/5099).

java/ql/src/experimental/Security/CWE/CWE-117/LogInjection.ql

@@ -1,38 +0,0 @@
-/**
- * @name Log Injection
- * @description Building log entries from user-controlled data is vulnerable to
- *              insertion of forged log entries by a malicious user.
- * @kind path-problem
- * @problem.severity error
- * @precision high
- * @id java/log-injection
- * @tags security
- *       external/cwe/cwe-117
- */
-
-import java
-import DataFlow::PathGraph
-import experimental.semmle.code.java.Logging
-import semmle.code.java.dataflow.FlowSources
-
-/**
- * A taint-tracking configuration for tracking untrusted user input used in log entries.
- */
-private class LogInjectionConfiguration extends TaintTracking::Configuration {
-  LogInjectionConfiguration() { this = "Log Injection" }
-
-  override predicate isSource(DataFlow::Node source) { source instanceof RemoteFlowSource }
-
-  override predicate isSink(DataFlow::Node sink) {
-    sink.asExpr() = any(LoggingCall c).getALogArgument()
-  }
-
-  override predicate isSanitizer(DataFlow::Node node) {
-    node.getType() instanceof BoxedType or node.getType() instanceof PrimitiveType
-  }
-}
-
-from LogInjectionConfiguration cfg, DataFlow::PathNode source, DataFlow::PathNode sink
-where cfg.hasFlowPath(source, sink)
-select sink.getNode(), source, sink, "$@ flows to log entry.", source.getNode(),
-  "User-provided value"

java/ql/src/experimental/Security/CWE/CWE-348/ClientSuppliedIpUsedInSecurityCheckLib.qll

@@ -2,7 +2,6 @@ import java
 import DataFlow
 import semmle.code.java.frameworks.Networking
 import semmle.code.java.security.QueryInjection
-import experimental.semmle.code.java.Logging
 
 /**
  * A data flow source of the client ip obtained according to the remote endpoint identifier specified

java/ql/src/experimental/Security/CWE/CWE-532/SensitiveInfoLog.ql

@@ -11,9 +11,9 @@
  */
 
 import java
+import semmle.code.java.dataflow.ExternalFlow
 import semmle.code.java.dataflow.TaintTracking
 import semmle.code.java.security.SensitiveActions
-import experimental.semmle.code.java.Logging
 import DataFlow
 import PathGraph
 
@@ -36,9 +36,7 @@ class LoggerConfiguration extends DataFlow::Configuration {
 
   override predicate isSource(DataFlow::Node source) { source.asExpr() instanceof CredentialExpr }
 
-  override predicate isSink(DataFlow::Node sink) {
+  override predicate isSink(DataFlow::Node sink) { sinkNode(sink, "logging") }
-    exists(LoggingCall c | sink.asExpr() = c.getALogArgument())
-  }
 
   override predicate isAdditionalFlowStep(DataFlow::Node node1, DataFlow::Node node2) {
     TaintTracking::localTaintStep(node1, node2)

java/ql/src/experimental/semmle/code/java/Logging.qll

@@ -1,40 +0,0 @@
-/**
- * Provides classes and predicates for working with loggers.
- */
-
-import java
-
-/** Models a call to a logging method. */
-class LoggingCall extends MethodAccess {
-  LoggingCall() {
-    exists(RefType t, Method m |
-      t.hasQualifiedName("org.apache.log4j", "Category") or // Log4j 1
-      t.hasQualifiedName("org.apache.logging.log4j", ["Logger", "LogBuilder"]) or // Log4j 2
-      t.hasQualifiedName("org.apache.commons.logging", "Log") or
-      // JBoss Logging (`org.jboss.logging.Logger` in some implementations like JBoss Application Server 4.0.4 did not implement `BasicLogger`)
-      t.hasQualifiedName("org.jboss.logging", ["BasicLogger", "Logger"]) or
-      t.hasQualifiedName("org.slf4j.spi", "LoggingEventBuilder") or
-      t.hasQualifiedName("org.slf4j", "Logger") or
-      t.hasQualifiedName("org.scijava.log", "Logger") or
-      t.hasQualifiedName("com.google.common.flogger", "LoggingApi") or
-      t.hasQualifiedName("java.lang", "System$Logger") or
-      t.hasQualifiedName("java.util.logging", "Logger")
-    |
-      (
-        m.getDeclaringType().getASourceSupertype*() = t or
-        m.getDeclaringType().extendsOrImplements*(t)
-      ) and
-      m.getReturnType() instanceof VoidType and
-      this = m.getAReference()
-    )
-    or
-    exists(RefType t, Method m | t.hasQualifiedName("android.util", "Log") |
-      m.hasName(["d", "e", "i", "v", "w", "wtf"]) and
-      m.getDeclaringType() = t and
-      this = m.getAReference()
-    )
-  }
-
-  /** Returns an argument which would be logged by this call. */
-  Argument getALogArgument() { result = this.getArgument(_) }
-}

java/ql/test/library-tests/logging/Test.java

@@ -0,0 +1,168 @@
+package generatedtest;
+
+import java.util.logging.LogRecord;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.message.EntryMessage;
+import org.apache.logging.log4j.message.Message;
+import org.slf4j.spi.LoggingEventBuilder;
+
+// Test case generated by GenerateFlowTestCase.ql
+public class Test {
+
+	Object source() {
+		return null;
+	}
+
+	void sink(Object o) {}
+
+	public void test() throws Exception {
+
+		{
+			// "java.util.logging;LogRecord;false;LogRecord;;;Argument[1];Argument[-1];taint"
+			LogRecord out = null;
+			String in = (String) source();
+			out = new LogRecord(null, in);
+			sink(out); // $ hasTaintFlow
+		}
+		{
+			// "org.apache.logging.log4j;Logger;true;traceEntry;(Message);;Argument[0];ReturnValue;taint"
+			EntryMessage out = null;
+			Message in = (Message) source();
+			Logger instance = null;
+			out = instance.traceEntry(in);
+			sink(out); // $ hasTaintFlow
+		}
+		{
+			// "org.apache.logging.log4j;Logger;true;traceEntry;(String,Object[]);;Argument[0..1];ReturnValue;taint"
+			EntryMessage out = null;
+			Object[] in = (Object[]) source();
+			Logger instance = null;
+			out = instance.traceEntry((String) null, in);
+			sink(out); // $ hasTaintFlow
+		}
+		{
+			// "org.apache.logging.log4j;Logger;true;traceEntry;(String,Object[]);;Argument[0..1];ReturnValue;taint"
+			EntryMessage out = null;
+			String in = (String) source();
+			Logger instance = null;
+			out = instance.traceEntry(in, (Object[]) null);
+			sink(out); // $ hasTaintFlow
+		}
+		{
+			// "org.apache.logging.log4j;Logger;true;traceEntry;(String,Supplier[]);;Argument[0..1];ReturnValue;taint"
+			EntryMessage out = null;
+			String in = (String) source();
+			Logger instance = null;
+			out = instance.traceEntry(in, (org.apache.logging.log4j.util.Supplier[]) null);
+			sink(out); // $ hasTaintFlow
+		}
+		{
+			// "org.apache.logging.log4j;Logger;true;traceEntry;(String,Supplier[]);;Argument[0..1];ReturnValue;taint"
+			EntryMessage out = null;
+			org.apache.logging.log4j.util.Supplier[] in =
+					(org.apache.logging.log4j.util.Supplier[]) source();
+			Logger instance = null;
+			out = instance.traceEntry((String) null, in);
+			sink(out); // $ hasTaintFlow
+		}
+		{
+			// "org.apache.logging.log4j;Logger;true;traceEntry;(Supplier[]);;Argument[0];ReturnValue;taint"
+			EntryMessage out = null;
+			org.apache.logging.log4j.util.Supplier[] in =
+					(org.apache.logging.log4j.util.Supplier[]) source();
+			Logger instance = null;
+			out = instance.traceEntry(in);
+			sink(out); // $ hasTaintFlow
+		}
+		{
+			// "org.apache.logging.log4j;Logger;true;traceExit;(EntryMessage,Object);;Argument[1];ReturnValue;value"
+			Object out = null;
+			Object in = (Object) source();
+			Logger instance = null;
+			out = instance.traceExit((EntryMessage) null, in);
+			sink(out); // $ hasValueFlow
+		}
+		{
+			// "org.apache.logging.log4j;Logger;true;traceExit;(Message,Object);;Argument[1];ReturnValue;value"
+			Object out = null;
+			Object in = (Object) source();
+			Logger instance = null;
+			out = instance.traceExit((Message) null, in);
+			sink(out); // $ hasValueFlow
+		}
+		{
+			// "org.apache.logging.log4j;Logger;true;traceExit;(Object);;Argument[0];ReturnValue;value"
+			Object out = null;
+			Object in = (Object) source();
+			Logger instance = null;
+			out = instance.traceExit(in);
+			sink(out); // $ hasValueFlow
+		}
+		{
+			// "org.apache.logging.log4j;Logger;true;traceExit;(String,Object);;Argument[1];ReturnValue;value"
+			Object out = null;
+			Object in = (Object) source();
+			Logger instance = null;
+			out = instance.traceExit((String) null, in);
+			sink(out); // $ hasValueFlow
+		}
+		{
+			// "org.slf4j.spi;LoggingEventBuilder;true;addArgument;;;Argument[-1];ReturnValue;value"
+			LoggingEventBuilder out = null;
+			LoggingEventBuilder in = (LoggingEventBuilder) source();
+			out = in.addArgument((Object) null);
+			sink(out); // $ hasValueFlow
+		}
+		{
+			// "org.slf4j.spi;LoggingEventBuilder;true;addArgument;;;Argument[-1];ReturnValue;value"
+			LoggingEventBuilder out = null;
+			LoggingEventBuilder in = (LoggingEventBuilder) source();
+			out = in.addArgument((java.util.function.Supplier) null);
+			sink(out); // $ hasValueFlow
+		}
+		{
+			// "org.slf4j.spi;LoggingEventBuilder;true;addKeyValue;;;Argument[-1];ReturnValue;value"
+			LoggingEventBuilder out = null;
+			LoggingEventBuilder in = (LoggingEventBuilder) source();
+			out = in.addKeyValue((String) null, (Object) null);
+			sink(out); // $ hasValueFlow
+		}
+		{
+			// "org.slf4j.spi;LoggingEventBuilder;true;addKeyValue;;;Argument[-1];ReturnValue;value"
+			LoggingEventBuilder out = null;
+			LoggingEventBuilder in = (LoggingEventBuilder) source();
+			out = in.addKeyValue((String) null, (java.util.function.Supplier) null);
+			sink(out); // $ hasValueFlow
+		}
+		{
+			// "org.slf4j.spi;LoggingEventBuilder;true;addKeyValue;;;Argument[1];Argument[-1];taint"
+			LoggingEventBuilder out = null;
+			Object in = (Object) source();
+			out.addKeyValue((String) null, in);
+			sink(out); // $ hasTaintFlow
+		}
+		{
+			// "org.slf4j.spi;LoggingEventBuilder;true;addKeyValue;;;Argument[1];Argument[-1];taint"
+			LoggingEventBuilder out = null;
+			java.util.function.Supplier in = (java.util.function.Supplier) source();
+			out.addKeyValue((String) null, in);
+			sink(out); // $ hasTaintFlow
+		}
+		{
+			// "org.slf4j.spi;LoggingEventBuilder;true;addMarker;;;Argument[-1];ReturnValue;value"
+			LoggingEventBuilder out = null;
+			LoggingEventBuilder in = (LoggingEventBuilder) source();
+			out = in.addMarker(null);
+			sink(out); // $ hasValueFlow
+		}
+		{
+			// "org.slf4j.spi;LoggingEventBuilder;true;setCause;;;Argument[-1];ReturnValue;value"
+			LoggingEventBuilder out = null;
+			LoggingEventBuilder in = (LoggingEventBuilder) source();
+			out = in.setCause(null);
+			sink(out); // $ hasValueFlow
+		}
+
+	}
+
+}

java/ql/test/library-tests/logging/options

@@ -0,0 +1 @@
+//semmle-extractor-options: --javac-args -cp ${testdir}/../../stubs/apache-log4j-2.14.1:${testdir}/../../stubs/slf4j-2.0.0

java/ql/test/library-tests/logging/test.ql

@@ -0,0 +1,2 @@
+import java
+import TestUtilities.InlineFlowTest

java/ql/test/query-tests/security/CWE-117/LogInjectionTest.ql

@@ -0,0 +1,17 @@
+import java
+import semmle.code.java.security.LogInjectionQuery
+import TestUtilities.InlineFlowTest
+
+private class TestSource extends RemoteFlowSource {
+  TestSource() { this.asExpr().(MethodAccess).getMethod().hasName("source") }
+
+  override string getSourceType() { result = "test source" }
+}
+
+private class LogInjectionTest extends InlineFlowTest {
+  override DataFlow::Configuration getValueFlowConfig() { none() }
+
+  override TaintTracking::Configuration getTaintFlowConfig() {
+    result instanceof LogInjectionConfiguration
+  }
+}

java/ql/test/query-tests/security/CWE-117/options

@@ -0,0 +1 @@
+//semmle-extractor-options: --javac-args -cp ${testdir}/../../../stubs/apache-log4j-1.2.17:${testdir}/../../../stubs/apache-log4j-2.14.1:${testdir}/../../../stubs/apache-commons-logging-1.2:${testdir}/../../../stubs/jboss-logging-3.4.2:${testdir}/../../../stubs/slf4j-2.0.0:${testdir}/../../../stubs/scijava-common-2.87.1:${testdir}/../../../stubs/flogger-0.7.1:${testdir}/../../../stubs/google-android-9.0.0

java/ql/test/stubs/apache-commons-logging-1.2/org/apache/commons/logging/Log.java

@@ -1,5 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.apache.commons.logging;
 
 public interface Log {
+    void debug(Object message);
+
+    void debug(Object message, Throwable t);
+
+    void error(Object message);
+
+    void error(Object message, Throwable t);
+
+    void fatal(Object message);
+
+    void fatal(Object message, Throwable t);
+
+    void info(Object message);
+
+    void info(Object message, Throwable t);
+
+    boolean isDebugEnabled();
+
+    boolean isErrorEnabled();
+
+    boolean isFatalEnabled();
+
+    boolean isInfoEnabled();
+
+    boolean isTraceEnabled();
+
+    boolean isWarnEnabled();
+
+    void trace(Object message);
+
+    void trace(Object message, Throwable t);
+
+    void warn(Object message);
+
+    void warn(Object message, Throwable t);
 
 }

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/Appender.java

@@ -0,0 +1,47 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.apache.log4j;
+
+import org.apache.log4j.spi.Filter;
+import org.apache.log4j.spi.ErrorHandler;
+import org.apache.log4j.spi.LoggingEvent;
+
+public interface Appender {
+  void addFilter(Filter newFilter);
+
+  Filter getFilter();
+
+  void clearFilters();
+
+  void close();
+
+  void doAppend(LoggingEvent event);
+
+  String getName();
+
+  void setErrorHandler(ErrorHandler errorHandler);
+
+  ErrorHandler getErrorHandler();
+
+  void setLayout(Layout layout);
+
+  Layout getLayout();
+
+  void setName(String name);
+
+  boolean requiresLayout();
+
+}

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/Category.java

@@ -0,0 +1,181 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+// Contibutors: Alex Blewitt <Alex.Blewitt@ioshq.com>
+// Markus Oestreicher <oes@zurich.ibm.com>
+// Frank Hoering <fhr@zurich.ibm.com>
+// Nelson Minar <nelson@media.mit.edu>
+// Jim Cakalic <jim_cakalic@na.biomerieux.com>
+// Avy Sharell <asharell@club-internet.fr>
+// Ciaran Treanor <ciaran@xelector.com>
+// Jeff Turner <jeff@socialchange.net.au>
+// Michael Horwitz <MHorwitz@siemens.co.za>
+// Calvin Chan <calvin.chan@hic.gov.au>
+// Aaron Greenhouse <aarong@cs.cmu.edu>
+// Beat Meier <bmeier@infovia.com.ar>
+// Colin Sampaleanu <colinml1@exis.com>
+
+package org.apache.log4j;
+
+import org.apache.log4j.spi.AppenderAttachable;
+import org.apache.log4j.spi.LoggingEvent;
+import org.apache.log4j.spi.LoggerRepository;
+import java.util.Enumeration;
+import java.util.ResourceBundle;
+
+public class Category implements AppenderAttachable {
+    synchronized public void addAppender(Appender newAppender) {}
+
+    public void assertLog(boolean assertion, String msg) {}
+
+    public void callAppenders(LoggingEvent event) {}
+
+    public void debug(Object message) {}
+
+    public void debug(Object message, Throwable t) {}
+
+    public void error(Object message) {}
+
+    public void error(Object message, Throwable t) {}
+
+    public static Logger exists(String name) {
+        return null;
+    }
+
+    public void fatal(Object message) {}
+
+    public void fatal(Object message, Throwable t) {}
+
+    public boolean getAdditivity() {
+        return false;
+    }
+
+    synchronized public Enumeration getAllAppenders() {
+        return null;
+    }
+
+    synchronized public Appender getAppender(String name) {
+        return null;
+    }
+
+    public Level getEffectiveLevel() {
+        return null;
+    }
+
+    public Priority getChainedPriority() {
+        return null;
+    }
+
+    public static Enumeration getCurrentCategories() {
+        return null;
+    }
+
+    public static LoggerRepository getDefaultHierarchy() {
+        return null;
+    }
+
+    public LoggerRepository getHierarchy() {
+        return null;
+    }
+
+    public LoggerRepository getLoggerRepository() {
+        return null;
+    }
+
+    public static Category getInstance(String name) {
+        return null;
+    }
+
+    public static Category getInstance(Class clazz) {
+        return null;
+    }
+
+    public final String getName() {
+        return null;
+    }
+
+    final public Category getParent() {
+        return null;
+    }
+
+    final public Level getLevel() {
+        return null;
+    }
+
+    final public Level getPriority() {
+        return null;
+    }
+
+    final public static Category getRoot() {
+        return null;
+    }
+
+    public ResourceBundle getResourceBundle() {
+        return null;
+    }
+
+    public void info(Object message) {}
+
+    public void info(Object message, Throwable t) {}
+
+    public boolean isAttached(Appender appender) {
+        return false;
+    }
+
+    public boolean isDebugEnabled() {
+        return false;
+    }
+
+    public boolean isEnabledFor(Priority level) {
+        return false;
+    }
+
+    public boolean isInfoEnabled() {
+        return false;
+    }
+
+    public void l7dlog(Priority priority, String key, Throwable t) {}
+
+    public void l7dlog(Priority priority, String key, Object[] params, Throwable t) {}
+
+    public void log(Priority priority, Object message, Throwable t) {}
+
+    public void log(Priority priority, Object message) {}
+
+    public void log(String callerFQCN, Priority level, Object message, Throwable t) {}
+
+    synchronized public void removeAllAppenders() {}
+
+    synchronized public void removeAppender(Appender appender) {}
+
+    synchronized public void removeAppender(String name) {}
+
+    public void setAdditivity(boolean additive) {}
+
+    public void setLevel(Level level) {}
+
+    public void setPriority(Priority priority) {}
+
+    public void setResourceBundle(ResourceBundle bundle) {}
+
+    public static void shutdown() {}
+
+    public void warn(Object message) {}
+
+    public void warn(Object message, Throwable t) {}
+
+    public void forcedLog(String fqcn, Priority level, Object message, Throwable t) {}
+
+}

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/Layout.java

@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.apache.log4j;
+
+import org.apache.log4j.spi.OptionHandler;
+
+public abstract class Layout implements OptionHandler {
+  public final static String LINE_SEP = System.getProperty("line.separator");
+
+  public final static int LINE_SEP_LEN = LINE_SEP.length();
+
+}

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/Level.java

@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+// Contributors: Kitching Simon <Simon.Kitching@orange.ch>
+// Nicholas Wolff
+
+package org.apache.log4j;
+
+import java.io.Serializable;
+
+public class Level extends Priority implements Serializable {
+
+
+}

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/Logger.java

@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.log4j;
+
+public class Logger extends Category {
+    public void trace(Object message) {
+    }
+
+    public void trace(Object message, Throwable t) {
+    }
+
+    public boolean isTraceEnabled() {
+      return false;
+    }
+
+}

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/Priority.java

@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+// Contributors: Kitching Simon <Simon.Kitching@orange.ch>
+
+package org.apache.log4j;
+
+public class Priority {
+
+}

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/spi/AppenderAttachable.java

@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.apache.log4j.spi;
+
+import org.apache.log4j.Appender;
+import java.util.Enumeration;
+
+public interface AppenderAttachable {
+  void addAppender(Appender newAppender);
+
+  Enumeration getAllAppenders();
+
+  Appender getAppender(String name);
+
+  boolean isAttached(Appender appender);
+
+  void removeAllAppenders();
+
+  void removeAppender(Appender appender);
+
+  void removeAppender(String name);
+
+}

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/spi/ErrorHandler.java

@@ -0,0 +1,34 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.apache.log4j.spi;
+
+import org.apache.log4j.Appender;
+import org.apache.log4j.Logger;
+
+public interface ErrorHandler extends OptionHandler {
+  void setLogger(Logger logger);
+
+  void error(String message, Exception e, int errorCode);
+
+  void error(String message);
+
+  void error(String message, Exception e, int errorCode, LoggingEvent event);
+
+  void setAppender(Appender appender);
+
+  void setBackupAppender(Appender appender);
+
+}

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/spi/Filter.java

@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.apache.log4j.spi;
+
+public abstract class Filter implements OptionHandler {
+  public void setNext(Filter next) {}
+
+  public Filter getNext() {
+    return null;
+  }
+
+}

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/spi/LoggerRepository.java

@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.apache.log4j.spi;
+
+import java.util.Enumeration;
+import org.apache.log4j.Appender;
+import org.apache.log4j.Category;
+import org.apache.log4j.Level;
+import org.apache.log4j.Logger;
+
+public interface LoggerRepository {
+
+  boolean isDisabled(int level);
+
+  void setThreshold(Level level);
+
+  void setThreshold(String val);
+
+  void emitNoAppenderWarning(Category cat);
+
+  Level getThreshold();
+
+  Logger getLogger(String name);
+
+  Logger getRootLogger();
+
+  Logger exists(String name);
+
+  void shutdown();
+
+  Enumeration getCurrentLoggers();
+
+  Enumeration getCurrentCategories();
+
+  void fireAddAppenderEvent(Category logger, Appender appender);
+
+  void resetConfiguration();
+
+}

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/spi/LoggingEvent.java

@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.apache.log4j.spi;
+
+import java.util.Map;
+import java.util.Set;
+import org.apache.log4j.Category;
+import org.apache.log4j.Level;
+import org.apache.log4j.Priority;
+
+public class LoggingEvent implements java.io.Serializable {
+  public LoggingEvent(String fqnOfCategoryClass, Category logger, Priority level, Object message,
+      Throwable throwable) {}
+
+  public LoggingEvent(String fqnOfCategoryClass, Category logger, long timeStamp, Priority level,
+      Object message, Throwable throwable) {}
+
+  public Level getLevel() {
+    return null;
+  }
+
+  public String getLoggerName() {
+    return null;
+  }
+
+  public Category getLogger() {
+    return null;
+  }
+
+  public static long getStartTime() {
+    return 0;
+  }
+
+  public final void setProperty(final String propName, final String propValue) {}
+
+  public final String getProperty(final String key) {
+    return null;
+  }
+
+  public final boolean locationInformationExists() {
+    return false;
+  }
+
+  public final long getTimeStamp() {
+    return 0;
+  }
+
+  public Set getPropertyKeySet() {
+    return null;
+  }
+
+  public Map getProperties() {
+    return null;
+  }
+
+  public String getFQNOfLoggerClass() {
+    return null;
+  }
+
+  public Object removeProperty(String propName) {
+    return null;
+  }
+
+}

java/ql/test/stubs/apache-log4j-1.2.17/org/apache/log4j/spi/OptionHandler.java

@@ -0,0 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.log4j.spi;
+
+public interface OptionHandler {
+  void activateOptions();
+
+}

java/ql/test/stubs/flogger-0.7.1/com/google/common/flogger/LoggingApi.java

@@ -0,0 +1,573 @@
+/*
+ * Copyright (C) 2012 The Flogger Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.google.common.flogger;
+
+import java.util.concurrent.TimeUnit;
+
+// NOTE: new methods to this interface should be coordinated with google-java-format
+public interface LoggingApi<API extends LoggingApi<API>> {
+  API withCause(Throwable cause);
+
+  API every(int n);
+
+  API atMostEvery(int n, TimeUnit unit);
+
+  API per(Enum<?> key);
+
+  API withInjectedLogSite(String internalClassName, String methodName, int encodedLineNumber,
+      String sourceFileName);
+
+  boolean isEnabled();
+
+  void logVarargs(String message, Object[] varargs);
+
+  void log();
+
+  void log(String msg);
+
+  void log(String msg, Object p1);
+
+  void log(String msg, Object p1, Object p2);
+
+  void log(String msg, Object p1, Object p2, Object p3);
+
+  void log(String msg, Object p1, Object p2, Object p3, Object p4);
+
+  void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5);
+
+  void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5, Object p6);
+
+  void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5, Object p6, Object p7);
+
+  void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5, Object p6, Object p7,
+      Object p8);
+
+  void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5, Object p6, Object p7,
+      Object p8, Object p9);
+
+  void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5, Object p6, Object p7,
+      Object p8, Object p9, Object p10);
+
+  void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5, Object p6, Object p7,
+      Object p8, Object p9, Object p10, Object... rest);
+
+  void log(String msg, char p1);
+
+  void log(String msg, byte p1);
+
+  void log(String msg, short p1);
+
+  void log(String msg, int p1);
+
+  void log(String msg, long p1);
+
+  void log(String msg, Object p1, boolean p2);
+
+  void log(String msg, Object p1, char p2);
+
+  void log(String msg, Object p1, byte p2);
+
+  void log(String msg, Object p1, short p2);
+
+  void log(String msg, Object p1, int p2);
+
+  void log(String msg, Object p1, long p2);
+
+  void log(String msg, Object p1, float p2);
+
+  void log(String msg, Object p1, double p2);
+
+  void log(String msg, boolean p1, Object p2);
+
+  void log(String msg, char p1, Object p2);
+
+  void log(String msg, byte p1, Object p2);
+
+  void log(String msg, short p1, Object p2);
+
+  void log(String msg, int p1, Object p2);
+
+  void log(String msg, long p1, Object p2);
+
+  void log(String msg, float p1, Object p2);
+
+  void log(String msg, double p1, Object p2);
+
+  void log(String msg, boolean p1, boolean p2);
+
+  void log(String msg, char p1, boolean p2);
+
+  void log(String msg, byte p1, boolean p2);
+
+  void log(String msg, short p1, boolean p2);
+
+  void log(String msg, int p1, boolean p2);
+
+  void log(String msg, long p1, boolean p2);
+
+  void log(String msg, float p1, boolean p2);
+
+  void log(String msg, double p1, boolean p2);
+
+  void log(String msg, boolean p1, char p2);
+
+  void log(String msg, char p1, char p2);
+
+  void log(String msg, byte p1, char p2);
+
+  void log(String msg, short p1, char p2);
+
+  void log(String msg, int p1, char p2);
+
+  void log(String msg, long p1, char p2);
+
+  void log(String msg, float p1, char p2);
+
+  void log(String msg, double p1, char p2);
+
+  void log(String msg, boolean p1, byte p2);
+
+  void log(String msg, char p1, byte p2);
+
+  void log(String msg, byte p1, byte p2);
+
+  void log(String msg, short p1, byte p2);
+
+  void log(String msg, int p1, byte p2);
+
+  void log(String msg, long p1, byte p2);
+
+  void log(String msg, float p1, byte p2);
+
+  void log(String msg, double p1, byte p2);
+
+  void log(String msg, boolean p1, short p2);
+
+  void log(String msg, char p1, short p2);
+
+  void log(String msg, byte p1, short p2);
+
+  void log(String msg, short p1, short p2);
+
+  void log(String msg, int p1, short p2);
+
+  void log(String msg, long p1, short p2);
+
+  void log(String msg, float p1, short p2);
+
+  void log(String msg, double p1, short p2);
+
+  void log(String msg, boolean p1, int p2);
+
+  void log(String msg, char p1, int p2);
+
+  void log(String msg, byte p1, int p2);
+
+  void log(String msg, short p1, int p2);
+
+  void log(String msg, int p1, int p2);
+
+  void log(String msg, long p1, int p2);
+
+  void log(String msg, float p1, int p2);
+
+  void log(String msg, double p1, int p2);
+
+  void log(String msg, boolean p1, long p2);
+
+  void log(String msg, char p1, long p2);
+
+  void log(String msg, byte p1, long p2);
+
+  void log(String msg, short p1, long p2);
+
+  void log(String msg, int p1, long p2);
+
+  void log(String msg, long p1, long p2);
+
+  void log(String msg, float p1, long p2);
+
+  void log(String msg, double p1, long p2);
+
+  void log(String msg, boolean p1, float p2);
+
+  void log(String msg, char p1, float p2);
+
+  void log(String msg, byte p1, float p2);
+
+  void log(String msg, short p1, float p2);
+
+  void log(String msg, int p1, float p2);
+
+  void log(String msg, long p1, float p2);
+
+  void log(String msg, float p1, float p2);
+
+  void log(String msg, double p1, float p2);
+
+  void log(String msg, boolean p1, double p2);
+
+  void log(String msg, char p1, double p2);
+
+  void log(String msg, byte p1, double p2);
+
+  void log(String msg, short p1, double p2);
+
+  void log(String msg, int p1, double p2);
+
+  void log(String msg, long p1, double p2);
+
+  void log(String msg, float p1, double p2);
+
+  void log(String msg, double p1, double p2);
+
+  public static class NoOp<API extends LoggingApi<API>> implements LoggingApi<API> {
+
+    @Override
+    public API withInjectedLogSite(String internalClassName, String methodName,
+        int encodedLineNumber, String sourceFileName) {
+      return null;
+    }
+
+    @Override
+    public final boolean isEnabled() {
+      return false;
+    }
+
+    @Override
+    public API per(Enum<?> key) {
+      return null;
+    }
+
+    @Override
+    public final API withCause(Throwable cause) {
+      return null;
+    }
+
+    @Override
+    public final API every(int n) {
+      return null;
+    }
+
+    @Override
+    public final API atMostEvery(int n, TimeUnit unit) {
+      return null;
+    }
+
+    @Override
+    public final void logVarargs(String msg, Object[] params) {}
+
+    @Override
+    public final void log() {}
+
+    @Override
+    public final void log(String msg) {}
+
+    @Override
+    public final void log(String msg, Object p1) {}
+
+    @Override
+    public final void log(String msg, Object p1, Object p2) {}
+
+    @Override
+    public final void log(String msg, Object p1, Object p2, Object p3) {}
+
+    @Override
+    public final void log(String msg, Object p1, Object p2, Object p3, Object p4) {}
+
+    @Override
+    public final void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5) {}
+
+    @Override
+    public final void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5,
+        Object p6) {}
+
+    @Override
+    public final void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5,
+        Object p6, Object p7) {}
+
+    @Override
+    public final void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5,
+        Object p6, Object p7, Object p8) {}
+
+    @Override
+    public final void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5,
+        Object p6, Object p7, Object p8, Object p9) {}
+
+    @Override
+    public final void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5,
+        Object p6, Object p7, Object p8, Object p9, Object p10) {}
+
+    @Override
+    public final void log(String msg, Object p1, Object p2, Object p3, Object p4, Object p5,
+        Object p6, Object p7, Object p8, Object p9, Object p10, Object... rest) {}
+
+    @Override
+    public final void log(String msg, char p1) {}
+
+    @Override
+    public final void log(String msg, byte p1) {}
+
+    @Override
+    public final void log(String msg, short p1) {}
+
+    @Override
+    public final void log(String msg, int p1) {}
+
+    @Override
+    public final void log(String msg, long p1) {}
+
+    @Override
+    public final void log(String msg, Object p1, boolean p2) {}
+
+    @Override
+    public final void log(String msg, Object p1, char p2) {}
+
+    @Override
+    public final void log(String msg, Object p1, byte p2) {}
+
+    @Override
+    public final void log(String msg, Object p1, short p2) {}
+
+    @Override
+    public final void log(String msg, Object p1, int p2) {}
+
+    @Override
+    public final void log(String msg, Object p1, long p2) {}
+
+    @Override
+    public final void log(String msg, Object p1, float p2) {}
+
+    @Override
+    public final void log(String msg, Object p1, double p2) {}
+
+    @Override
+    public final void log(String msg, boolean p1, Object p2) {}
+
+    @Override
+    public final void log(String msg, char p1, Object p2) {}
+
+    @Override
+    public final void log(String msg, byte p1, Object p2) {}
+
+    @Override
+    public final void log(String msg, short p1, Object p2) {}
+
+    @Override
+    public final void log(String msg, int p1, Object p2) {}
+
+    @Override
+    public final void log(String msg, long p1, Object p2) {}
+
+    @Override
+    public final void log(String msg, float p1, Object p2) {}
+
+    @Override
+    public final void log(String msg, double p1, Object p2) {}
+
+    @Override
+    public final void log(String msg, boolean p1, boolean p2) {}
+
+    @Override
+    public final void log(String msg, char p1, boolean p2) {}
+
+    @Override
+    public final void log(String msg, byte p1, boolean p2) {}
+
+    @Override
+    public final void log(String msg, short p1, boolean p2) {}
+
+    @Override
+    public final void log(String msg, int p1, boolean p2) {}
+
+    @Override
+    public final void log(String msg, long p1, boolean p2) {}
+
+    @Override
+    public final void log(String msg, float p1, boolean p2) {}
+
+    @Override
+    public final void log(String msg, double p1, boolean p2) {}
+
+    @Override
+    public final void log(String msg, boolean p1, char p2) {}
+
+    @Override
+    public final void log(String msg, char p1, char p2) {}
+
+    @Override
+    public final void log(String msg, byte p1, char p2) {}
+
+    @Override
+    public final void log(String msg, short p1, char p2) {}
+
+    @Override
+    public final void log(String msg, int p1, char p2) {}
+
+    @Override
+    public final void log(String msg, long p1, char p2) {}
+
+    @Override
+    public final void log(String msg, float p1, char p2) {}
+
+    @Override
+    public final void log(String msg, double p1, char p2) {}
+
+    @Override
+    public final void log(String msg, boolean p1, byte p2) {}
+
+    @Override
+    public final void log(String msg, char p1, byte p2) {}
+
+    @Override
+    public final void log(String msg, byte p1, byte p2) {}
+
+    @Override
+    public final void log(String msg, short p1, byte p2) {}
+
+    @Override
+    public final void log(String msg, int p1, byte p2) {}
+
+    @Override
+    public final void log(String msg, long p1, byte p2) {}
+
+    @Override
+    public final void log(String msg, float p1, byte p2) {}
+
+    @Override
+    public final void log(String msg, double p1, byte p2) {}
+
+    @Override
+    public final void log(String msg, boolean p1, short p2) {}
+
+    @Override
+    public final void log(String msg, char p1, short p2) {}
+
+    @Override
+    public final void log(String msg, byte p1, short p2) {}
+
+    @Override
+    public final void log(String msg, short p1, short p2) {}
+
+    @Override
+    public final void log(String msg, int p1, short p2) {}
+
+    @Override
+    public final void log(String msg, long p1, short p2) {}
+
+    @Override
+    public final void log(String msg, float p1, short p2) {}
+
+    @Override
+    public final void log(String msg, double p1, short p2) {}
+
+    @Override
+    public final void log(String msg, boolean p1, int p2) {}
+
+    @Override
+    public final void log(String msg, char p1, int p2) {}
+
+    @Override
+    public final void log(String msg, byte p1, int p2) {}
+
+    @Override
+    public final void log(String msg, short p1, int p2) {}
+
+    @Override
+    public final void log(String msg, int p1, int p2) {}
+
+    @Override
+    public final void log(String msg, long p1, int p2) {}
+
+    @Override
+    public final void log(String msg, float p1, int p2) {}
+
+    @Override
+    public final void log(String msg, double p1, int p2) {}
+
+    @Override
+    public final void log(String msg, boolean p1, long p2) {}
+
+    @Override
+    public final void log(String msg, char p1, long p2) {}
+
+    @Override
+    public final void log(String msg, byte p1, long p2) {}
+
+    @Override
+    public final void log(String msg, short p1, long p2) {}
+
+    @Override
+    public final void log(String msg, int p1, long p2) {}
+
+    @Override
+    public final void log(String msg, long p1, long p2) {}
+
+    @Override
+    public final void log(String msg, float p1, long p2) {}
+
+    @Override
+    public final void log(String msg, double p1, long p2) {}
+
+    @Override
+    public final void log(String msg, boolean p1, float p2) {}
+
+    @Override
+    public final void log(String msg, char p1, float p2) {}
+
+    @Override
+    public final void log(String msg, byte p1, float p2) {}
+
+    @Override
+    public final void log(String msg, short p1, float p2) {}
+
+    @Override
+    public final void log(String msg, int p1, float p2) {}
+
+    @Override
+    public final void log(String msg, long p1, float p2) {}
+
+    @Override
+    public final void log(String msg, float p1, float p2) {}
+
+    @Override
+    public final void log(String msg, double p1, float p2) {}
+
+    @Override
+    public final void log(String msg, boolean p1, double p2) {}
+
+    @Override
+    public final void log(String msg, char p1, double p2) {}
+
+    @Override
+    public final void log(String msg, byte p1, double p2) {}
+
+    @Override
+    public final void log(String msg, short p1, double p2) {}
+
+    @Override
+    public final void log(String msg, int p1, double p2) {}
+
+    @Override
+    public final void log(String msg, long p1, double p2) {}
+
+    @Override
+    public final void log(String msg, float p1, double p2) {}
+
+    @Override
+    public final void log(String msg, double p1, double p2) {}
+
+  }
+}

java/ql/test/stubs/google-android-9.0.0/android/util/Log.java

@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2006 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package android.util;
+
+import android.annotation.Nullable;
+
+public final class Log {
+  public @interface Level {
+  }
+
+  public static class TerribleFailure extends Exception {
+  }
+  public interface TerribleFailureHandler {
+    void onTerribleFailure(String tag, TerribleFailure what, boolean system);
+
+  }
+
+  public static int v(@Nullable String tag, String msg) {
+    return 0;
+  }
+
+  public static int v(@Nullable String tag, @Nullable String msg, @Nullable Throwable tr) {
+    return 0;
+  }
+
+  public static int d(@Nullable String tag, String msg) {
+    return 0;
+  }
+
+  public static int d(@Nullable String tag, @Nullable String msg, @Nullable Throwable tr) {
+    return 0;
+  }
+
+  public static int i(@Nullable String tag, String msg) {
+    return 0;
+  }
+
+  public static int i(@Nullable String tag, @Nullable String msg, @Nullable Throwable tr) {
+    return 0;
+  }
+
+  public static int w(@Nullable String tag, String msg) {
+    return 0;
+  }
+
+  public static int w(@Nullable String tag, @Nullable String msg, @Nullable Throwable tr) {
+    return 0;
+  }
+
+  public static native boolean isLoggable(@Nullable String tag, @Level int level);
+
+  public static int w(@Nullable String tag, @Nullable Throwable tr) {
+    return 0;
+  }
+
+  public static int e(@Nullable String tag, String msg) {
+    return 0;
+  }
+
+  public static int e(@Nullable String tag, @Nullable String msg, @Nullable Throwable tr) {
+    return 0;
+  }
+
+  public static int wtf(@Nullable String tag, @Nullable String msg) {
+    return 0;
+  }
+
+  public static int wtfStack(@Nullable String tag, @Nullable String msg) {
+    return 0;
+  }
+
+  public static int wtf(@Nullable String tag, Throwable tr) {
+    return 0;
+  }
+
+  public static int wtf(@Nullable String tag, @Nullable String msg, @Nullable Throwable tr) {
+    return 0;
+  }
+
+  public static TerribleFailureHandler setWtfHandler(TerribleFailureHandler handler) {
+    return null;
+  }
+
+  public static String getStackTraceString(@Nullable Throwable tr) {
+    return null;
+  }
+
+  public static int println(@Level int priority, @Nullable String tag, String msg) {
+    return 0;
+  }
+
+  public static native int println_native(int bufID, int priority, String tag, String msg);
+
+  public static int logToRadioBuffer(@Level int priority, @Nullable String tag,
+      @Nullable String message) {
+    return 0;
+  }
+
+  public static int printlns(int bufID, int priority, @Nullable String tag, String msg,
+      @Nullable Throwable tr) {
+    return 0;
+  }
+
+}

java/ql/test/stubs/jboss-logging-3.4.2/org/jboss/logging/BasicLogger.java

@@ -0,0 +1,426 @@
+/*
+ * JBoss, Home of Professional Open Source.
+ *
+ * Copyright 2010 Red Hat, Inc., and individual contributors as indicated by the @author tags.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.jboss.logging;
+
+public interface BasicLogger {
+    boolean isEnabled(Logger.Level level);
+
+    boolean isTraceEnabled();
+
+    void trace(Object message);
+
+    void trace(Object message, Throwable t);
+
+    void trace(String loggerFqcn, Object message, Throwable t);
+
+    void trace(String loggerFqcn, Object message, Object[] params, Throwable t);
+
+    void tracev(String format, Object... params);
+
+    void tracev(String format, Object param1);
+
+    void tracev(String format, Object param1, Object param2);
+
+    void tracev(String format, Object param1, Object param2, Object param3);
+
+    void tracev(Throwable t, String format, Object... params);
+
+    void tracev(Throwable t, String format, Object param1);
+
+    void tracev(Throwable t, String format, Object param1, Object param2);
+
+    void tracev(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void tracef(String format, Object... params);
+
+    void tracef(String format, Object param1);
+
+    void tracef(String format, Object param1, Object param2);
+
+    void tracef(String format, Object param1, Object param2, Object param3);
+
+    void tracef(Throwable t, String format, Object... params);
+
+    void tracef(Throwable t, String format, Object param1);
+
+    void tracef(Throwable t, String format, Object param1, Object param2);
+
+    void tracef(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void tracef(String format, int arg);
+
+    void tracef(String format, int arg1, int arg2);
+
+    void tracef(String format, int arg1, Object arg2);
+
+    void tracef(String format, int arg1, int arg2, int arg3);
+
+    void tracef(String format, int arg1, int arg2, Object arg3);
+
+    void tracef(String format, int arg1, Object arg2, Object arg3);
+
+    void tracef(Throwable t, String format, int arg);
+
+    void tracef(Throwable t, String format, int arg1, int arg2);
+
+    void tracef(Throwable t, String format, int arg1, Object arg2);
+
+    void tracef(Throwable t, String format, int arg1, int arg2, int arg3);
+
+    void tracef(Throwable t, String format, int arg1, int arg2, Object arg3);
+
+    void tracef(Throwable t, String format, int arg1, Object arg2, Object arg3);
+
+    void tracef(String format, long arg);
+
+    void tracef(String format, long arg1, long arg2);
+
+    void tracef(String format, long arg1, Object arg2);
+
+    void tracef(String format, long arg1, long arg2, long arg3);
+
+    void tracef(String format, long arg1, long arg2, Object arg3);
+
+    void tracef(String format, long arg1, Object arg2, Object arg3);
+
+    void tracef(Throwable t, String format, long arg);
+
+    void tracef(Throwable t, String format, long arg1, long arg2);
+
+    void tracef(Throwable t, String format, long arg1, Object arg2);
+
+    void tracef(Throwable t, String format, long arg1, long arg2, long arg3);
+
+    void tracef(Throwable t, String format, long arg1, long arg2, Object arg3);
+
+    void tracef(Throwable t, String format, long arg1, Object arg2, Object arg3);
+
+    boolean isDebugEnabled();
+
+    void debug(Object message);
+
+    void debug(Object message, Throwable t);
+
+    void debug(String loggerFqcn, Object message, Throwable t);
+
+    void debug(String loggerFqcn, Object message, Object[] params, Throwable t);
+
+    void debugv(String format, Object... params);
+
+    void debugv(String format, Object param1);
+
+    void debugv(String format, Object param1, Object param2);
+
+    void debugv(String format, Object param1, Object param2, Object param3);
+
+    void debugv(Throwable t, String format, Object... params);
+
+    void debugv(Throwable t, String format, Object param1);
+
+    void debugv(Throwable t, String format, Object param1, Object param2);
+
+    void debugv(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void debugf(String format, Object... params);
+
+    void debugf(String format, Object param1);
+
+    void debugf(String format, Object param1, Object param2);
+
+    void debugf(String format, Object param1, Object param2, Object param3);
+
+    void debugf(Throwable t, String format, Object... params);
+
+    void debugf(Throwable t, String format, Object param1);
+
+    void debugf(Throwable t, String format, Object param1, Object param2);
+
+    void debugf(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void debugf(String format, int arg);
+
+    void debugf(String format, int arg1, int arg2);
+
+    void debugf(String format, int arg1, Object arg2);
+
+    void debugf(String format, int arg1, int arg2, int arg3);
+
+    void debugf(String format, int arg1, int arg2, Object arg3);
+
+    void debugf(String format, int arg1, Object arg2, Object arg3);
+
+    void debugf(Throwable t, String format, int arg);
+
+    void debugf(Throwable t, String format, int arg1, int arg2);
+
+    void debugf(Throwable t, String format, int arg1, Object arg2);
+
+    void debugf(Throwable t, String format, int arg1, int arg2, int arg3);
+
+    void debugf(Throwable t, String format, int arg1, int arg2, Object arg3);
+
+    void debugf(Throwable t, String format, int arg1, Object arg2, Object arg3);
+
+    void debugf(String format, long arg);
+
+    void debugf(String format, long arg1, long arg2);
+
+    void debugf(String format, long arg1, Object arg2);
+
+    void debugf(String format, long arg1, long arg2, long arg3);
+
+    void debugf(String format, long arg1, long arg2, Object arg3);
+
+    void debugf(String format, long arg1, Object arg2, Object arg3);
+
+    void debugf(Throwable t, String format, long arg);
+
+    void debugf(Throwable t, String format, long arg1, long arg2);
+
+    void debugf(Throwable t, String format, long arg1, Object arg2);
+
+    void debugf(Throwable t, String format, long arg1, long arg2, long arg3);
+
+    void debugf(Throwable t, String format, long arg1, long arg2, Object arg3);
+
+    void debugf(Throwable t, String format, long arg1, Object arg2, Object arg3);
+
+    boolean isInfoEnabled();
+
+    void info(Object message);
+
+    void info(Object message, Throwable t);
+
+    void info(String loggerFqcn, Object message, Throwable t);
+
+    void info(String loggerFqcn, Object message, Object[] params, Throwable t);
+
+    void infov(String format, Object... params);
+
+    void infov(String format, Object param1);
+
+    void infov(String format, Object param1, Object param2);
+
+    void infov(String format, Object param1, Object param2, Object param3);
+
+    void infov(Throwable t, String format, Object... params);
+
+    void infov(Throwable t, String format, Object param1);
+
+    void infov(Throwable t, String format, Object param1, Object param2);
+
+    void infov(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void infof(String format, Object... params);
+
+    void infof(String format, Object param1);
+
+    void infof(String format, Object param1, Object param2);
+
+    void infof(String format, Object param1, Object param2, Object param3);
+
+    void infof(Throwable t, String format, Object... params);
+
+    void infof(Throwable t, String format, Object param1);
+
+    void infof(Throwable t, String format, Object param1, Object param2);
+
+    void infof(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void warn(Object message);
+
+    void warn(Object message, Throwable t);
+
+    void warn(String loggerFqcn, Object message, Throwable t);
+
+    void warn(String loggerFqcn, Object message, Object[] params, Throwable t);
+
+    void warnv(String format, Object... params);
+
+    void warnv(String format, Object param1);
+
+    void warnv(String format, Object param1, Object param2);
+
+    void warnv(String format, Object param1, Object param2, Object param3);
+
+    void warnv(Throwable t, String format, Object... params);
+
+    void warnv(Throwable t, String format, Object param1);
+
+    void warnv(Throwable t, String format, Object param1, Object param2);
+
+    void warnv(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void warnf(String format, Object... params);
+
+    void warnf(String format, Object param1);
+
+    void warnf(String format, Object param1, Object param2);
+
+    void warnf(String format, Object param1, Object param2, Object param3);
+
+    void warnf(Throwable t, String format, Object... params);
+
+    void warnf(Throwable t, String format, Object param1);
+
+    void warnf(Throwable t, String format, Object param1, Object param2);
+
+    void warnf(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void error(Object message);
+
+    void error(Object message, Throwable t);
+
+    void error(String loggerFqcn, Object message, Throwable t);
+
+    void error(String loggerFqcn, Object message, Object[] params, Throwable t);
+
+    void errorv(String format, Object... params);
+
+    void errorv(String format, Object param1);
+
+    void errorv(String format, Object param1, Object param2);
+
+    void errorv(String format, Object param1, Object param2, Object param3);
+
+    void errorv(Throwable t, String format, Object... params);
+
+    void errorv(Throwable t, String format, Object param1);
+
+    void errorv(Throwable t, String format, Object param1, Object param2);
+
+    void errorv(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void errorf(String format, Object... params);
+
+    void errorf(String format, Object param1);
+
+    void errorf(String format, Object param1, Object param2);
+
+    void errorf(String format, Object param1, Object param2, Object param3);
+
+    void errorf(Throwable t, String format, Object... params);
+
+    void errorf(Throwable t, String format, Object param1);
+
+    void errorf(Throwable t, String format, Object param1, Object param2);
+
+    void errorf(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void fatal(Object message);
+
+    void fatal(Object message, Throwable t);
+
+    void fatal(String loggerFqcn, Object message, Throwable t);
+
+    void fatal(String loggerFqcn, Object message, Object[] params, Throwable t);
+
+    void fatalv(String format, Object... params);
+
+    void fatalv(String format, Object param1);
+
+    void fatalv(String format, Object param1, Object param2);
+
+    void fatalv(String format, Object param1, Object param2, Object param3);
+
+    void fatalv(Throwable t, String format, Object... params);
+
+    void fatalv(Throwable t, String format, Object param1);
+
+    void fatalv(Throwable t, String format, Object param1, Object param2);
+
+    void fatalv(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void fatalf(String format, Object... params);
+
+    void fatalf(String format, Object param1);
+
+    void fatalf(String format, Object param1, Object param2);
+
+    void fatalf(String format, Object param1, Object param2, Object param3);
+
+    void fatalf(Throwable t, String format, Object... params);
+
+    void fatalf(Throwable t, String format, Object param1);
+
+    void fatalf(Throwable t, String format, Object param1, Object param2);
+
+    void fatalf(Throwable t, String format, Object param1, Object param2, Object param3);
+
+    void log(Logger.Level level, Object message);
+
+    void log(Logger.Level level, Object message, Throwable t);
+
+    void log(Logger.Level level, String loggerFqcn, Object message, Throwable t);
+
+    void log(String loggerFqcn, Logger.Level level, Object message, Object[] params, Throwable t);
+
+    void logv(Logger.Level level, String format, Object... params);
+
+    void logv(Logger.Level level, String format, Object param1);
+
+    void logv(Logger.Level level, String format, Object param1, Object param2);
+
+    void logv(Logger.Level level, String format, Object param1, Object param2, Object param3);
+
+    void logv(Logger.Level level, Throwable t, String format, Object... params);
+
+    void logv(Logger.Level level, Throwable t, String format, Object param1);
+
+    void logv(Logger.Level level, Throwable t, String format, Object param1, Object param2);
+
+    void logv(Logger.Level level, Throwable t, String format, Object param1, Object param2,
+            Object param3);
+
+    void logv(String loggerFqcn, Logger.Level level, Throwable t, String format, Object... params);
+
+    void logv(String loggerFqcn, Logger.Level level, Throwable t, String format, Object param1);
+
+    void logv(String loggerFqcn, Logger.Level level, Throwable t, String format, Object param1,
+            Object param2);
+
+    void logv(String loggerFqcn, Logger.Level level, Throwable t, String format, Object param1,
+            Object param2, Object param3);
+
+    void logf(Logger.Level level, String format, Object... params);
+
+    void logf(Logger.Level level, String format, Object param1);
+
+    void logf(Logger.Level level, String format, Object param1, Object param2);
+
+    void logf(Logger.Level level, String format, Object param1, Object param2, Object param3);
+
+    void logf(Logger.Level level, Throwable t, String format, Object... params);
+
+    void logf(Logger.Level level, Throwable t, String format, Object param1);
+
+    void logf(Logger.Level level, Throwable t, String format, Object param1, Object param2);
+
+    void logf(Logger.Level level, Throwable t, String format, Object param1, Object param2,
+            Object param3);
+
+    void logf(String loggerFqcn, Logger.Level level, Throwable t, String format, Object param1);
+
+    void logf(String loggerFqcn, Logger.Level level, Throwable t, String format, Object param1,
+            Object param2);
+
+    void logf(String loggerFqcn, Logger.Level level, Throwable t, String format, Object param1,
+            Object param2, Object param3);
+
+    void logf(String loggerFqcn, Logger.Level level, Throwable t, String format, Object... params);
+
+}

java/ql/test/stubs/jboss-logging-3.4.2/org/jboss/logging/Logger.java

@@ -0,0 +1,696 @@
+/*
+ * JBoss, Home of Professional Open Source.
+ *
+ * Copyright 2011 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jboss.logging;
+import java.io.Serializable;
+import java.util.Locale;
+
+public abstract class Logger implements Serializable, BasicLogger {
+    public enum Level {
+    }
+    public String getName() {
+      return null;
+    }
+
+    public boolean isTraceEnabled() {
+      return false;
+    }
+
+    public void trace(Object message) {
+    }
+
+    public void trace(Object message, Throwable t) {
+    }
+
+    public void trace(String loggerFqcn, Object message, Throwable t) {
+    }
+
+    public void trace(Object message, Object[] params) {
+    }
+
+    public void trace(Object message, Object[] params, Throwable t) {
+    }
+
+    public void trace(String loggerFqcn, Object message, Object[] params, Throwable t) {
+    }
+
+    public void tracev(String format, Object... params) {
+    }
+
+    public void tracev(String format, Object param1) {
+    }
+
+    public void tracev(String format, Object param1, Object param2) {
+    }
+
+    public void tracev(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void tracev(Throwable t, String format, Object... params) {
+    }
+
+    public void tracev(Throwable t, String format, Object param1) {
+    }
+
+    public void tracev(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void tracev(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void tracef(String format, Object... params) {
+    }
+
+    public void tracef(String format, Object param1) {
+    }
+
+    public void tracef(String format, Object param1, Object param2) {
+    }
+
+    public void tracef(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void tracef(Throwable t, String format, Object... params) {
+    }
+
+    public void tracef(Throwable t, String format, Object param1) {
+    }
+
+    public void tracef(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void tracef(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void tracef(final String format, final int arg) {
+    }
+
+    public void tracef(final String format, final int arg1, final int arg2) {
+    }
+
+    public void tracef(final String format, final int arg1, final Object arg2) {
+    }
+
+    public void tracef(final String format, final int arg1, final int arg2, final int arg3) {
+    }
+
+    public void tracef(final String format, final int arg1, final int arg2, final Object arg3) {
+    }
+
+    public void tracef(final String format, final int arg1, final Object arg2, final Object arg3) {
+    }
+
+    public void tracef(final Throwable t, final String format, final int arg) {
+    }
+
+    public void tracef(final Throwable t, final String format, final int arg1, final int arg2) {
+    }
+
+    public void tracef(final Throwable t, final String format, final int arg1, final Object arg2) {
+    }
+
+    public void tracef(final Throwable t, final String format, final int arg1, final int arg2, final int arg3) {
+    }
+
+    public void tracef(final Throwable t, final String format, final int arg1, final int arg2, final Object arg3) {
+    }
+
+    public void tracef(final Throwable t, final String format, final int arg1, final Object arg2, final Object arg3) {
+    }
+
+    public void tracef(final String format, final long arg) {
+    }
+
+    public void tracef(final String format, final long arg1, final long arg2) {
+    }
+
+    public void tracef(final String format, final long arg1, final Object arg2) {
+    }
+
+    public void tracef(final String format, final long arg1, final long arg2, final long arg3) {
+    }
+
+    public void tracef(final String format, final long arg1, final long arg2, final Object arg3) {
+    }
+
+    public void tracef(final String format, final long arg1, final Object arg2, final Object arg3) {
+    }
+
+    public void tracef(final Throwable t, final String format, final long arg) {
+    }
+
+    public void tracef(final Throwable t, final String format, final long arg1, final long arg2) {
+    }
+
+    public void tracef(final Throwable t, final String format, final long arg1, final Object arg2) {
+    }
+
+    public void tracef(final Throwable t, final String format, final long arg1, final long arg2, final long arg3) {
+    }
+
+    public void tracef(final Throwable t, final String format, final long arg1, final long arg2, final Object arg3) {
+    }
+
+    public void tracef(final Throwable t, final String format, final long arg1, final Object arg2, final Object arg3) {
+    }
+
+    public boolean isDebugEnabled() {
+      return false;
+    }
+
+    public void debug(Object message) {
+    }
+
+    public void debug(Object message, Throwable t) {
+    }
+
+    public void debug(String loggerFqcn, Object message, Throwable t) {
+    }
+
+    public void debug(Object message, Object[] params) {
+    }
+
+    public void debug(Object message, Object[] params, Throwable t) {
+    }
+
+    public void debug(String loggerFqcn, Object message, Object[] params, Throwable t) {
+    }
+
+    public void debugv(String format, Object... params) {
+    }
+
+    public void debugv(String format, Object param1) {
+    }
+
+    public void debugv(String format, Object param1, Object param2) {
+    }
+
+    public void debugv(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void debugv(Throwable t, String format, Object... params) {
+    }
+
+    public void debugv(Throwable t, String format, Object param1) {
+    }
+
+    public void debugv(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void debugv(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void debugf(String format, Object... params) {
+    }
+
+    public void debugf(String format, Object param1) {
+    }
+
+    public void debugf(String format, Object param1, Object param2) {
+    }
+
+    public void debugf(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void debugf(Throwable t, String format, Object... params) {
+    }
+
+    public void debugf(Throwable t, String format, Object param1) {
+    }
+
+    public void debugf(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void debugf(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void debugf(final String format, final int arg) {
+    }
+
+    public void debugf(final String format, final int arg1, final int arg2) {
+    }
+
+    public void debugf(final String format, final int arg1, final Object arg2) {
+    }
+
+    public void debugf(final String format, final int arg1, final int arg2, final int arg3) {
+    }
+
+    public void debugf(final String format, final int arg1, final int arg2, final Object arg3) {
+    }
+
+    public void debugf(final String format, final int arg1, final Object arg2, final Object arg3) {
+    }
+
+    public void debugf(final Throwable t, final String format, final int arg) {
+    }
+
+    public void debugf(final Throwable t, final String format, final int arg1, final int arg2) {
+    }
+
+    public void debugf(final Throwable t, final String format, final int arg1, final Object arg2) {
+    }
+
+    public void debugf(final Throwable t, final String format, final int arg1, final int arg2, final int arg3) {
+    }
+
+    public void debugf(final Throwable t, final String format, final int arg1, final int arg2, final Object arg3) {
+    }
+
+    public void debugf(final Throwable t, final String format, final int arg1, final Object arg2, final Object arg3) {
+    }
+
+    public void debugf(final String format, final long arg) {
+    }
+
+    public void debugf(final String format, final long arg1, final long arg2) {
+    }
+
+    public void debugf(final String format, final long arg1, final Object arg2) {
+    }
+
+    public void debugf(final String format, final long arg1, final long arg2, final long arg3) {
+    }
+
+    public void debugf(final String format, final long arg1, final long arg2, final Object arg3) {
+    }
+
+    public void debugf(final String format, final long arg1, final Object arg2, final Object arg3) {
+    }
+
+    public void debugf(final Throwable t, final String format, final long arg) {
+    }
+
+    public void debugf(final Throwable t, final String format, final long arg1, final long arg2) {
+    }
+
+    public void debugf(final Throwable t, final String format, final long arg1, final Object arg2) {
+    }
+
+    public void debugf(final Throwable t, final String format, final long arg1, final long arg2, final long arg3) {
+    }
+
+    public void debugf(final Throwable t, final String format, final long arg1, final long arg2, final Object arg3) {
+    }
+
+    public void debugf(final Throwable t, final String format, final long arg1, final Object arg2, final Object arg3) {
+    }
+
+    public boolean isInfoEnabled() {
+      return false;
+    }
+
+    public void info(Object message) {
+    }
+
+    public void info(Object message, Throwable t) {
+    }
+
+    public void info(String loggerFqcn, Object message, Throwable t) {
+    }
+
+    public void info(Object message, Object[] params) {
+    }
+
+    public void info(Object message, Object[] params, Throwable t) {
+    }
+
+    public void info(String loggerFqcn, Object message, Object[] params, Throwable t) {
+    }
+
+    public void infov(String format, Object... params) {
+    }
+
+    public void infov(String format, Object param1) {
+    }
+
+    public void infov(String format, Object param1, Object param2) {
+    }
+
+    public void infov(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void infov(Throwable t, String format, Object... params) {
+    }
+
+    public void infov(Throwable t, String format, Object param1) {
+    }
+
+    public void infov(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void infov(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void infof(String format, Object... params) {
+    }
+
+    public void infof(String format, Object param1) {
+    }
+
+    public void infof(String format, Object param1, Object param2) {
+    }
+
+    public void infof(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void infof(Throwable t, String format, Object... params) {
+    }
+
+    public void infof(Throwable t, String format, Object param1) {
+    }
+
+    public void infof(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void infof(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void warn(Object message) {
+    }
+
+    public void warn(Object message, Throwable t) {
+    }
+
+    public void warn(String loggerFqcn, Object message, Throwable t) {
+    }
+
+    public void warn(Object message, Object[] params) {
+    }
+
+    public void warn(Object message, Object[] params, Throwable t) {
+    }
+
+    public void warn(String loggerFqcn, Object message, Object[] params, Throwable t) {
+    }
+
+    public void warnv(String format, Object... params) {
+    }
+
+    public void warnv(String format, Object param1) {
+    }
+
+    public void warnv(String format, Object param1, Object param2) {
+    }
+
+    public void warnv(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void warnv(Throwable t, String format, Object... params) {
+    }
+
+    public void warnv(Throwable t, String format, Object param1) {
+    }
+
+    public void warnv(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void warnv(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void warnf(String format, Object... params) {
+    }
+
+    public void warnf(String format, Object param1) {
+    }
+
+    public void warnf(String format, Object param1, Object param2) {
+    }
+
+    public void warnf(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void warnf(Throwable t, String format, Object... params) {
+    }
+
+    public void warnf(Throwable t, String format, Object param1) {
+    }
+
+    public void warnf(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void warnf(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void error(Object message) {
+    }
+
+    public void error(Object message, Throwable t) {
+    }
+
+    public void error(String loggerFqcn, Object message, Throwable t) {
+    }
+
+    public void error(Object message, Object[] params) {
+    }
+
+    public void error(Object message, Object[] params, Throwable t) {
+    }
+
+    public void error(String loggerFqcn, Object message, Object[] params, Throwable t) {
+    }
+
+    public void errorv(String format, Object... params) {
+    }
+
+    public void errorv(String format, Object param1) {
+    }
+
+    public void errorv(String format, Object param1, Object param2) {
+    }
+
+    public void errorv(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void errorv(Throwable t, String format, Object... params) {
+    }
+
+    public void errorv(Throwable t, String format, Object param1) {
+    }
+
+    public void errorv(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void errorv(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void errorf(String format, Object... params) {
+    }
+
+    public void errorf(String format, Object param1) {
+    }
+
+    public void errorf(String format, Object param1, Object param2) {
+    }
+
+    public void errorf(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void errorf(Throwable t, String format, Object... params) {
+    }
+
+    public void errorf(Throwable t, String format, Object param1) {
+    }
+
+    public void errorf(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void errorf(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void fatal(Object message) {
+    }
+
+    public void fatal(Object message, Throwable t) {
+    }
+
+    public void fatal(String loggerFqcn, Object message, Throwable t) {
+    }
+
+    public void fatal(Object message, Object[] params) {
+    }
+
+    public void fatal(Object message, Object[] params, Throwable t) {
+    }
+
+    public void fatal(String loggerFqcn, Object message, Object[] params, Throwable t) {
+    }
+
+    public void fatalv(String format, Object... params) {
+    }
+
+    public void fatalv(String format, Object param1) {
+    }
+
+    public void fatalv(String format, Object param1, Object param2) {
+    }
+
+    public void fatalv(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void fatalv(Throwable t, String format, Object... params) {
+    }
+
+    public void fatalv(Throwable t, String format, Object param1) {
+    }
+
+    public void fatalv(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void fatalv(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void fatalf(String format, Object... params) {
+    }
+
+    public void fatalf(String format, Object param1) {
+    }
+
+    public void fatalf(String format, Object param1, Object param2) {
+    }
+
+    public void fatalf(String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void fatalf(Throwable t, String format, Object... params) {
+    }
+
+    public void fatalf(Throwable t, String format, Object param1) {
+    }
+
+    public void fatalf(Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void fatalf(Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void log(Level level, Object message) {
+    }
+
+    public void log(Level level, Object message, Throwable t) {
+    }
+
+    public void log(Level level, String loggerFqcn, Object message, Throwable t) {
+    }
+
+    public void log(Level level, Object message, Object[] params) {
+    }
+
+    public void log(Level level, Object message, Object[] params, Throwable t) {
+    }
+
+    public void log(String loggerFqcn, Level level, Object message, Object[] params, Throwable t) {
+    }
+
+    public void logv(Level level, String format, Object... params) {
+    }
+
+    public void logv(Level level, String format, Object param1) {
+    }
+
+    public void logv(Level level, String format, Object param1, Object param2) {
+    }
+
+    public void logv(Level level, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void logv(Level level, Throwable t, String format, Object... params) {
+    }
+
+    public void logv(Level level, Throwable t, String format, Object param1) {
+    }
+
+    public void logv(Level level, Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void logv(Level level, Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void logv(String loggerFqcn, Level level, Throwable t, String format, Object... params) {
+    }
+
+    public void logv(String loggerFqcn, Level level, Throwable t, String format, Object param1) {
+    }
+
+    public void logv(String loggerFqcn, Level level, Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void logv(String loggerFqcn, Level level, Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void logf(Level level, String format, Object... params) {
+    }
+
+    public void logf(Level level, String format, Object param1) {
+    }
+
+    public void logf(Level level, String format, Object param1, Object param2) {
+    }
+
+    public void logf(Level level, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void logf(Level level, Throwable t, String format, Object... params) {
+    }
+
+    public void logf(Level level, Throwable t, String format, Object param1) {
+    }
+
+    public void logf(Level level, Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void logf(Level level, Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void logf(String loggerFqcn, Level level, Throwable t, String format, Object param1) {
+    }
+
+    public void logf(String loggerFqcn, Level level, Throwable t, String format, Object param1, Object param2) {
+    }
+
+    public void logf(String loggerFqcn, Level level, Throwable t, String format, Object param1, Object param2, Object param3) {
+    }
+
+    public void logf(String loggerFqcn, Level level, Throwable t, String format, Object... params) {
+    }
+
+    public static Logger getLogger(String name) {
+      return null;
+    }
+
+    public static Logger getLogger(String name, String suffix) {
+      return null;
+    }
+
+    public static Logger getLogger(Class<?> clazz) {
+      return null;
+    }
+
+    public static Logger getLogger(Class<?> clazz, String suffix) {
+      return null;
+    }
+
+    public static <T> T getMessageLogger(Class<T> type, String category) {
+      return null;
+    }
+
+    public static <T> T getMessageLogger(final Class<T> type, final String category, final Locale locale) {
+      return null;
+    }
+
+}

java/ql/test/stubs/scijava-common-2.87.1/org/scijava/log/Logger.java

@@ -0,0 +1,96 @@
+/*
+ * #%L SciJava Common shared library for SciJava software. %% Copyright (C) 2009 - 2021 SciJava
+ * developers. %% Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this list of conditions
+ * and the following disclaimer. 2. 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 HOLDERS 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. #L%
+ */
+
+package org.scijava.log;
+
+public interface Logger {
+	default void debug(final Object msg) {}
+
+	default void debug(final Throwable t) {}
+
+	default void debug(final Object msg, final Throwable t) {}
+
+	default void error(final Object msg) {}
+
+	default void error(final Throwable t) {}
+
+	default void error(final Object msg, final Throwable t) {}
+
+	default void info(final Object msg) {}
+
+	default void info(final Throwable t) {}
+
+	default void info(final Object msg, final Throwable t) {}
+
+	default void trace(final Object msg) {}
+
+	default void trace(final Throwable t) {}
+
+	default void trace(final Object msg, final Throwable t) {}
+
+	default void warn(final Object msg) {}
+
+	default void warn(final Throwable t) {}
+
+	default void warn(final Object msg, final Throwable t) {}
+
+	default boolean isDebug() {
+		return false;
+	}
+
+	default boolean isError() {
+		return false;
+	}
+
+	default boolean isInfo() {
+		return false;
+	}
+
+	default boolean isTrace() {
+		return false;
+	}
+
+	default boolean isWarn() {
+		return false;
+	}
+
+	default boolean isLevel(final int level) {
+		return false;
+	}
+
+	default void log(final int level, final Object msg) {}
+
+	default void log(final int level, final Throwable t) {}
+
+	default void log(final int level, final Object msg, final Throwable t) {}
+
+	void alwaysLog(int level, Object msg, Throwable t);
+
+	default String getName() {
+		return null;
+	}
+
+	int getLevel();
+
+	default Logger subLogger(String name) {
+		return null;
+	}
+
+}

java/ql/test/stubs/slf4j-2.0.0/org/slf4j/Logger.java

@@ -0,0 +1,177 @@
+/**
+ * Copyright (c) 2004-2021 QOS.ch All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+ * associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+ * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+package org.slf4j;
+
+import org.slf4j.event.Level;
+import org.slf4j.spi.LoggingEventBuilder;
+
+public interface Logger {
+  public String getName();
+
+  default public LoggingEventBuilder makeLoggingEventBuilder(Level level) {
+    return null;
+  }
+
+  default public boolean isEnabledForLevel(Level level) {
+    return false;
+  }
+
+  public boolean isTraceEnabled();
+
+  public void trace(String msg);
+
+  public void trace(String format, Object arg);
+
+  public void trace(String format, Object arg1, Object arg2);
+
+  public void trace(String format, Object... arguments);
+
+  public void trace(String msg, Throwable t);
+
+  public boolean isTraceEnabled(Marker marker);
+
+  default public LoggingEventBuilder atTrace() {
+    return null;
+  }
+
+  public void trace(Marker marker, String msg);
+
+  public void trace(Marker marker, String format, Object arg);
+
+  public void trace(Marker marker, String format, Object arg1, Object arg2);
+
+  public void trace(Marker marker, String format, Object... argArray);
+
+  public void trace(Marker marker, String msg, Throwable t);
+
+  public boolean isDebugEnabled();
+
+  public void debug(String msg);
+
+  public void debug(String format, Object arg);
+
+  public void debug(String format, Object arg1, Object arg2);
+
+  public void debug(String format, Object... arguments);
+
+  public void debug(String msg, Throwable t);
+
+  public boolean isDebugEnabled(Marker marker);
+
+  public void debug(Marker marker, String msg);
+
+  public void debug(Marker marker, String format, Object arg);
+
+  public void debug(Marker marker, String format, Object arg1, Object arg2);
+
+  public void debug(Marker marker, String format, Object... arguments);
+
+  public void debug(Marker marker, String msg, Throwable t);
+
+  default public LoggingEventBuilder atDebug() {
+    return null;
+  }
+
+  public boolean isInfoEnabled();
+
+  public void info(String msg);
+
+  public void info(String format, Object arg);
+
+  public void info(String format, Object arg1, Object arg2);
+
+  public void info(String format, Object... arguments);
+
+  public void info(String msg, Throwable t);
+
+  public boolean isInfoEnabled(Marker marker);
+
+  public void info(Marker marker, String msg);
+
+  public void info(Marker marker, String format, Object arg);
+
+  public void info(Marker marker, String format, Object arg1, Object arg2);
+
+  public void info(Marker marker, String format, Object... arguments);
+
+  public void info(Marker marker, String msg, Throwable t);
+
+  default public LoggingEventBuilder atInfo() {
+    return null;
+  }
+
+  public boolean isWarnEnabled();
+
+  public void warn(String msg);
+
+  public void warn(String format, Object arg);
+
+  public void warn(String format, Object... arguments);
+
+  public void warn(String format, Object arg1, Object arg2);
+
+  public void warn(String msg, Throwable t);
+
+  public boolean isWarnEnabled(Marker marker);
+
+  public void warn(Marker marker, String msg);
+
+  public void warn(Marker marker, String format, Object arg);
+
+  public void warn(Marker marker, String format, Object arg1, Object arg2);
+
+  public void warn(Marker marker, String format, Object... arguments);
+
+  public void warn(Marker marker, String msg, Throwable t);
+
+  default public LoggingEventBuilder atWarn() {
+    return null;
+  }
+
+  public boolean isErrorEnabled();
+
+  public void error(String msg);
+
+  public void error(String format, Object arg);
+
+  public void error(String format, Object arg1, Object arg2);
+
+  public void error(String format, Object... arguments);
+
+  public void error(String msg, Throwable t);
+
+  public boolean isErrorEnabled(Marker marker);
+
+  public void error(Marker marker, String msg);
+
+  public void error(Marker marker, String format, Object arg);
+
+  public void error(Marker marker, String format, Object arg1, Object arg2);
+
+  public void error(Marker marker, String format, Object... arguments);
+
+  public void error(Marker marker, String msg, Throwable t);
+
+  default public LoggingEventBuilder atError() {
+    return null;
+  }
+
+}

java/ql/test/stubs/slf4j-2.0.0/org/slf4j/Marker.java

@@ -0,0 +1,46 @@
+/**
+ * Copyright (c) 2004-2011 QOS.ch All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+ * associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+ * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+package org.slf4j;
+
+import java.io.Serializable;
+import java.util.Iterator;
+
+public interface Marker extends Serializable {
+    public String getName();
+
+    public void add(Marker reference);
+
+    public boolean remove(Marker reference);
+
+    public boolean hasChildren();
+
+    public boolean hasReferences();
+
+    public Iterator<Marker> iterator();
+
+    public boolean contains(Marker other);
+
+    public boolean contains(String name);
+
+    public boolean equals(Object o);
+
+    public int hashCode();
+
+}

java/ql/test/stubs/slf4j-2.0.0/org/slf4j/event/Level.java

@@ -0,0 +1,17 @@
+package org.slf4j.event;
+
+public enum Level {
+  ;
+  public int toInt() {
+    return 0;
+  }
+
+  public static Level intToLevel(int levelInt) {
+    return null;
+  }
+
+  public String toString() {
+    return null;
+  }
+
+}

java/ql/test/stubs/slf4j-2.0.0/org/slf4j/spi/LoggingEventBuilder.java

@@ -0,0 +1,48 @@
+/**
+ * Copyright (c) 2004-2021 QOS.ch All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+ * associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+ * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+package org.slf4j.spi;
+
+import java.util.function.Supplier;
+import org.slf4j.Marker;
+
+public interface LoggingEventBuilder {
+    LoggingEventBuilder setCause(Throwable cause);
+
+    LoggingEventBuilder addMarker(Marker marker);
+
+    LoggingEventBuilder addArgument(Object p);
+
+    LoggingEventBuilder addArgument(Supplier<?> objectSupplier);
+
+    LoggingEventBuilder addKeyValue(String key, Object value);
+
+    LoggingEventBuilder addKeyValue(String key, Supplier<Object> value);
+
+    void log(String message);
+
+    void log(String message, Object arg);
+
+    void log(String message, Object arg0, Object arg1);
+
+    void log(String message, Object... args);
+
+    void log(Supplier<String> messageSupplier);
+
+}