Browse Source
New JDD debugging code from Vojta (disabled by default).
New JDD debugging code from Vojta (disabled by default).
git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@3639 bbc10eb1-c90d-0410-af57-cb519fbb1720master
Dave Parker
15 years ago
7 changed files with 284 additions and 2 deletions
-
23prism/include/DebugJDD.h
-
165prism/src/jdd/DebugJDD.java
-
5prism/src/jdd/JDD.cc
-
82prism/src/jdd/JDD.java
-
4prism/src/jdd/JDDNode.java
-
5prism/src/jdd/Makefile
-
2prism/src/prism/Prism.java
@ -0,0 +1,23 @@ |
|||
/* DO NOT EDIT THIS FILE - it is machine generated */ |
|||
#include <jni.h> |
|||
/* Header for class jdd_DebugJDD */ |
|||
|
|||
#ifndef _Included_jdd_DebugJDD |
|||
#define _Included_jdd_DebugJDD |
|||
#ifdef __cplusplus |
|||
extern "C" { |
|||
#endif |
|||
#undef jdd_DebugJDD_debugEnabled |
|||
#define jdd_DebugJDD_debugEnabled 1L |
|||
/* |
|||
* Class: jdd_DebugJDD |
|||
* Method: DebugJDD_GetRefCount |
|||
* Signature: (J)I |
|||
*/ |
|||
JNIEXPORT jint JNICALL Java_jdd_DebugJDD_DebugJDD_1GetRefCount |
|||
(JNIEnv *, jclass, jlong); |
|||
|
|||
#ifdef __cplusplus |
|||
} |
|||
#endif |
|||
#endif |
|||
@ -0,0 +1,165 @@ |
|||
//============================================================================== |
|||
// |
|||
// Copyright (c) 2002- |
|||
// Authors: |
|||
// * Vojtech Forejt <vojtech.forejt@cs.ox.ac.uk> (University of Oxford) |
|||
// |
|||
//------------------------------------------------------------------------------ |
|||
// |
|||
// This file is part of PRISM. |
|||
// |
|||
// PRISM is free software; you can redistribute it and/or modify |
|||
// it under the terms of the GNU General Public License as published by |
|||
// the Free Software Foundation; either version 2 of the License, or |
|||
// (at your option) any later version. |
|||
// |
|||
// PRISM is distributed in the hope that it will be useful, |
|||
// but WITHOUT ANY WARRANTY; without even the implied warranty of |
|||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|||
// GNU General Public License for more details. |
|||
// |
|||
// You should have received a copy of the GNU General Public License |
|||
// along with PRISM; if not, write to the Free Software Foundation, |
|||
// Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
|||
// |
|||
//============================================================================== |
|||
|
|||
package jdd; |
|||
|
|||
import java.util.HashMap; |
|||
import java.util.LinkedList; |
|||
import java.util.List; |
|||
|
|||
public class DebugJDD |
|||
{ |
|||
private static native int DebugJDD_GetRefCount(long dd); |
|||
|
|||
static { |
|||
try { |
|||
System.loadLibrary("jdd"); |
|||
} catch (UnsatisfiedLinkError e) { |
|||
System.out.println(e); |
|||
System.exit(1); |
|||
} |
|||
} |
|||
|
|||
/** |
|||
* determines if the debugging of JDD nodes is enabled. |
|||
*/ |
|||
public static final boolean debugEnabled = false; |
|||
|
|||
/** |
|||
* Where stack traces are kept. |
|||
* Key: hashcode of a JDDNode |
|||
* Value: stack trace from the moment the JDDNode was constructed. |
|||
*/ |
|||
protected static HashMap<Integer, StackTraceElement[]> stackTraces; |
|||
|
|||
/** |
|||
* Keeps track of refs and derefs made in Java |
|||
* Key: hashcode of a JDDNode |
|||
* Value: 1 + (number of times the node was refed) - (number of times the node was derefed) |
|||
*/ |
|||
protected static HashMap<Integer, Integer> localCounters; |
|||
|
|||
/** |
|||
* Keeps track of instances of JDDNode pointing to (native) DdNode |
|||
* Key: pointer to a DdNode |
|||
* Value: list of hashcodes of JDDNodes pointing to the DdNode |
|||
*/ |
|||
protected static HashMap<Long, List<Integer>> instances; |
|||
|
|||
protected static void addToSet(JDDNode node) |
|||
{ |
|||
//not thread safe |
|||
if (instances == null) { |
|||
instances = new HashMap<Long, List<Integer>>(); |
|||
localCounters = new HashMap<Integer, Integer>(); |
|||
stackTraces = new HashMap<Integer, StackTraceElement[]>(); |
|||
} |
|||
|
|||
int hc = System.identityHashCode(node); |
|||
if (instances.containsKey(node.ptr())) { |
|||
long ptr = node.ptr(); |
|||
instances.get(ptr).add(hc); |
|||
} else { |
|||
long ptr = node.ptr(); |
|||
List<Integer> al = new LinkedList<Integer>(); |
|||
al.add(hc); |
|||
instances.put(ptr, al); |
|||
} |
|||
localCounters.put(hc, 1); |
|||
|
|||
StackTraceElement[] st = Thread.currentThread().getStackTrace(); |
|||
//ignore first two elements which are Thread and this constructor |
|||
int num = st.length - 2; |
|||
StackTraceElement[] creator = new StackTraceElement[num]; |
|||
for (int i = 0; i < num; i++) { |
|||
creator[i] = st[i + 2]; |
|||
} |
|||
stackTraces.put(hc, creator); |
|||
} |
|||
|
|||
protected static void decrement(JDDNode node) |
|||
{ |
|||
int hc = System.identityHashCode(node); |
|||
int newValue = localCounters.get(hc) - 1; |
|||
localCounters.put(hc, newValue); |
|||
} |
|||
|
|||
protected static void increment(JDDNode node) |
|||
{ |
|||
int hc = System.identityHashCode(node); |
|||
int newValue = localCounters.get(hc) - 1; |
|||
localCounters.put(hc, newValue); |
|||
} |
|||
|
|||
public static void endLifeCycle() |
|||
{ |
|||
for (Long ptr : instances.keySet()) { |
|||
//check if cudd has nonzero number of references |
|||
int cuddRefCount = DebugJDD_GetRefCount(ptr); |
|||
if (cuddRefCount != 0) { |
|||
//check if there is a JDD object with nonzero refcount |
|||
boolean hasSuspicious = false; |
|||
for (Integer hc : instances.get(ptr)) { |
|||
int localRefCount = localCounters.get(hc); |
|||
if (localRefCount > 0) { |
|||
hasSuspicious = true; |
|||
break; |
|||
} |
|||
} |
|||
|
|||
//if !hasSuspicious, there is no useful output we could give. |
|||
//Either it's false alarm, or the problem is in c++ |
|||
if (!hasSuspicious) |
|||
continue; |
|||
System.out.println("WARNING: there are nodes with nonzero references, printing debug info. " |
|||
+ "Note that the stack traces below are from moments JDDNodes were " |
|||
+ "created. The actual problem can be elsewhere where the node is used"); |
|||
//print warning together with suspicious nodes |
|||
System.out.println("Node has " + cuddRefCount + " reference(s), printing out stack traces of suspicious node instances:"); |
|||
boolean first = true; |
|||
for (Integer hc : instances.get(ptr)) { |
|||
int localRefCount = localCounters.get(hc); |
|||
if (localRefCount != 0) { |
|||
if (!first) { |
|||
System.out.println(" &"); |
|||
//first=false; |
|||
} else { |
|||
first = false; |
|||
} |
|||
//print only top 5 methods from stack |
|||
int i = 0; |
|||
for (StackTraceElement st : stackTraces.get(hc)) { |
|||
if (i++ > 5) { |
|||
break; |
|||
} |
|||
System.out.println(" " + st.toString()); |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
Write
Preview
Loading…
Cancel
Save
Reference in new issue