Develop Reference

Heap Corruption In C When Using DLL With JNA

I am using C language Native API callbacks with DLL files. When we are calling callback first time everything is working fine but on second call I am getting heap corruption error and JVM is getting crashed.
In the native code the memory allocated in first call is being released and then is being used in second call again and during memory allocation in second call JVM is being crashed. But on the same place when in second call new memory pointer is used rather than the one which was used in previous call I am not getting this heap corruption error.
As this callback is called many times I can not keep on allocating new space every time. In below logs I am getting error as INVALID_POINTER_READ.
I am not able to understand what is the reason behind it and how this can be fixed. When same DLL is used with JNA it's working fine.
Java/JNA Code:
Setting Hook:
final PropertyCallBack callback = new PropertyCallBack();
final int setHookStatus = callback.setHook();
private static CALLBACK callback;
public int setHook() {
if (callback != null) {
return 0;
}
synchronized (this) {
if (callback == null) {
callback = new CALLBACK();
return callback.setHook();
}
}
return 0;
}
Callback Method Called From Native:
#Override
public int PropertyHook(final DESTINATION dest, final BACSTAC_READ_INFO.ByReference info) {
final PROPERTY_CONTENTS.ByReference content = new PROPERTY_CONTENTS.ByReference();
final BUFFER.ByReference buffer = new BUFFER.ByReference();
// Memory assign
final int bufferSize = 1048;
buffer.pBuffer = new Memory(bufferSize);
buffer.nBufferSize = bufferSize;
content.tag = "INVALID";
content.buffer = buffer;
content.nElements = 0;
Pointer dev = NativeLibrary.INSTANCE.Call_1();
Pointer obj = null;
if (dev != null) {
obj = NativeLibrary.INSTANCE.call_2(dev, info.objectID);
}
final int readDbStatus = NativeLibrary.INSTANCE.call_3(obj, info.prop, info.index, content, null);
final int responseStatus = NativeLibrary.INSTANCE.call_4(dest, info, content);
return 0;
}
When I analyzed heap dump with windbg I am getting below details:
This dump file has an exception of interest stored in it.
The stored exception information can be accessed via .ecxr.
(6201c.5ef10): Access violation - code c0000005 (first/second chance not available)
For analysis of this file, run !analyze -v
ntdll!NtWaitForMultipleObjects+0x14:
00007ffa`46deb4f4 c3 ret
0:026> !analyze -v
*******************************************************************************
* *
* Exception Analysis *
* *
*******************************************************************************
*** WARNING: Unable to verify checksum for srv.dll
DEBUG_FLR_EXCEPTION_CODE(c0000374) and the ".exr -1" ExceptionCode(c0000005) don't match
KEY_VALUES_STRING: 1
Key : AV.Fault
Value: Read
Key : Timeline.Process.Start.DeltaSec
Value: 46
PROCESSES_ANALYSIS: 1
SERVICE_ANALYSIS: 1
STACKHASH_ANALYSIS: 1
TIMELINE_ANALYSIS: 1
Timeline: !analyze.Start
Name: <blank>
Time: 2019-12-02T11:13:41.439Z
Diff: 3429439 mSec
Timeline: Dump.Current
Name: <blank>
Time: 2019-12-02T10:16:32.0Z
Diff: 0 mSec
Timeline: Process.Start
Name: <blank>
Time: 2019-12-02T10:15:46.0Z
Diff: 46000 mSec
DUMP_CLASS: 2
DUMP_QUALIFIER: 400
CONTEXT: (.ecxr)
rax=0000000000030000 rbx=000000002b200000 rcx=0000000000000303
rdx=0000000000000003 rsi=01fda8c00000ed00 rdi=000000002b223ef0
rip=00007ffa46d6cb7a rsp=000000002b8ff500 rbp=0000000000000008
r8=0000000000000028 r9=0000000000000030 r10=00000000014da2d0
r11=00000000014e2ef0 r12=0000000000000001 r13=0000000000000003
r14=000000002b223ee0 r15=000000000600c1ba
iopl=0 nv up ei pl zr na po nc
cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010246
ntdll!RtlpAllocateHeap+0xdaa:
00007ffa`46d6cb7a 498b07 mov rax,qword ptr [r15] ds:00000000`0600c1ba=????????????????
Resetting default scope
FAULTING_IP:
ntdll!RtlpAllocateHeap+daa
00007ffa`46d6cb7a 498b07 mov rax,qword ptr [r15]
EXCEPTION_RECORD: (.exr -1)
ExceptionAddress: 00007ffa46d6cb7a (ntdll!RtlpAllocateHeap+0x0000000000000daa)
ExceptionCode: c0000005 (Access violation)
ExceptionFlags: 00000000
NumberParameters: 2
Parameter[0]: 0000000000000000
Parameter[1]: 000000000600c1ba
Attempt to read from address 000000000600c1ba
DEFAULT_BUCKET_ID: HEAP_CORRUPTION
PROCESS_NAME: javaw.exe
FOLLOWUP_IP:
ntdll!RtlpAllocateHeap+daa
00007ffa`46d6cb7a 498b07 mov rax,qword ptr [r15]
READ_ADDRESS: 000000000600c1ba
ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%p referenced memory at 0x%p. The memory could not be %s.
EXCEPTION_CODE: (NTSTATUS) 0xc0000374 - A heap has been corrupted.
EXCEPTION_CODE_STR: c0000005
EXCEPTION_PARAMETER1: 0000000000000000
EXCEPTION_PARAMETER2: 000000000600c1ba
WATSON_BKT_PROCSTAMP: 5d1dea24
WATSON_BKT_PROCVER: 8.0.2210.11
PROCESS_VER_PRODUCT: Java(TM) Platform SE 8
WATSON_BKT_MODULE: ntdll.dll
WATSON_BKT_MODSTAMP: 7f828745
WATSON_BKT_MODOFFSET: 1cb7a
WATSON_BKT_MODVER: 10.0.17134.799
MODULE_VER_PRODUCT: Microsoft® Windows® Operating System
BUILD_VERSION_STRING: 17134.1.amd64fre.rs4_release.180410-1804
MODLIST_WITH_TSCHKSUM_HASH: f06ad8a6a7f7267c783c08e3a62df4696020d52f
MODLIST_SHA1_HASH: cdafa8057ac19b1a3608c439ebbfa992407212d6
NTGLOBALFLAG: 0
PROCESS_BAM_CURRENT_THROTTLED: 0
PROCESS_BAM_PREVIOUS_THROTTLED: 0
APPLICATION_VERIFIER_FLAGS: 0
DUMP_FLAGS: 94
DUMP_TYPE: 1
ANALYSIS_SESSION_HOST: MD2E86EC
ANALYSIS_SESSION_TIME: 12-02-2019 16:43:41.0439
ANALYSIS_VERSION: 10.0.18362.1 x86fre
THREAD_ATTRIBUTES:
ADDITIONAL_DEBUG_TEXT: Enable Pageheap/AutoVerifer ; Followup set based on attribute [Is_ChosenCrashFollowupThread] from Frame:[0] on thread:[PSEUDO_THREAD]
FAULTING_THREAD: 0005ef10
THREAD_SHA1_HASH_MOD_FUNC: 5d531e271dfb1ef7af4984c7ee0dd671c07337f5
THREAD_SHA1_HASH_MOD_FUNC_OFFSET: d858fa5fb04738fbbbbb9e4df89e26d53dc74794
OS_LOCALE: ENU
BUGCHECK_STR: APPLICATION_FAULT_INVALID_POINTER_READ_HEAP_CORRUPTION
PRIMARY_PROBLEM_CLASS: APPLICATION_FAULT
PROBLEM_CLASSES:
ID: [0n262]
Type: [HEAP_CORRUPTION]
Class: Primary
Scope: DEFAULT_BUCKET_ID (Failure Bucket ID prefix)
BUCKET_ID
Name: Add
Data: Omit
PID: [0x6201c]
TID: [0x5ef10]
Frame: [0] : ntdll!RtlpAllocateHeap
ID: [0n262]
Type: [HEAP_CORRUPTION]
Class: Primary
Scope: BUCKET_ID
Name: Add
Data: Omit
PID: [0x6201c]
TID: [0x5ef10]
Frame: [0] : ntdll!RtlpAllocateHeap
ID: [0n313]
Type: [#ACCESS_VIOLATION]
Class: Addendum
Scope: BUCKET_ID
Name: Omit
Data: Omit
PID: [Unspecified]
TID: [0x5ef10]
Frame: [0] : ntdll!RtlpAllocateHeap
ID: [0n285]
Type: [INVALID_POINTER_READ]
Class: Primary
Scope: BUCKET_ID
Name: Add
Data: Omit
PID: [Unspecified]
TID: [0x5ef10]
Frame: [0] : ntdll!RtlpAllocateHeap
LAST_CONTROL_TRANSFER: from 00007ffa46d69725 to 00007ffa46d6cb7a
STACK_TEXT:
00000000`00000000 00000000`00000000 heap_corruption!javaw.exe+0x0
THREAD_SHA1_HASH_MOD: ca4e26064d24ef7512d2e94de5a93c38dbe82fe9
SYMBOL_STACK_INDEX: 0
SYMBOL_NAME: heap_corruption!javaw.exe
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: heap_corruption
IMAGE_NAME: heap_corruption
DEBUG_FLR_IMAGE_TIMESTAMP: 0
STACK_COMMAND: ** Pseudo Context ** ManagedPseudo ** Value: a3807e8 ** ; kb
FAILURE_BUCKET_ID: HEAP_CORRUPTION_c0000005_heap_corruption!javaw.exe
BUCKET_ID: APPLICATION_FAULT_INVALID_POINTER_READ_HEAP_CORRUPTION_heap_corruption!javaw.exe
FAILURE_EXCEPTION_CODE: c0000005
FAILURE_IMAGE_NAME: heap_corruption
BUCKET_ID_IMAGE_STR: heap_corruption
FAILURE_MODULE_NAME: heap_corruption
BUCKET_ID_MODULE_STR: heap_corruption
FAILURE_FUNCTION_NAME: javaw.exe
BUCKET_ID_FUNCTION_STR: javaw.exe
BUCKET_ID_OFFSET: 0
BUCKET_ID_MODTIMEDATESTAMP: 0
BUCKET_ID_MODCHECKSUM: 0
BUCKET_ID_MODVER_STR: 0.0.0.0
BUCKET_ID_PREFIX_STR: APPLICATION_FAULT_INVALID_POINTER_READ_
FAILURE_PROBLEM_CLASS: APPLICATION_FAULT
FAILURE_SYMBOL_NAME: heap_corruption!javaw.exe
WATSON_STAGEONE_URL: http://watson.microsoft.com/StageOne/javaw.exe/8.0.2210.11/5d1dea24/ntdll.dll/10.0.17134.799/7f828745/c0000005/0001cb7a.htm?Retriage=1
TARGET_TIME: 2019-12-02T10:16:32.000Z
OSBUILD: 17134
OSSERVICEPACK: 753
SERVICEPACK_NUMBER: 0
OS_REVISION: 0
SUITE_MASK: 256
PRODUCT_TYPE: 1
OSPLATFORM_TYPE: x64
OSNAME: Windows 10
OSEDITION: Windows 10 WinNt SingleUserTS
USER_LCID: 0
OSBUILD_TIMESTAMP: unknown_date
BUILDDATESTAMP_STR: 180410-1804
BUILDLAB_STR: rs4_release
BUILDOSVER_STR: 10.0.17134.1.amd64fre.rs4_release.180410-1804
ANALYSIS_SESSION_ELAPSED_TIME: 307a
ANALYSIS_SOURCE: UM
FAILURE_ID_HASH_STRING: um:heap_corruption_c0000005_heap_corruption!javaw.exe
FAILURE_ID_HASH: {ddc2b378-b1e1-2aec-adc8-f11b7a5773a9}
Any help in fix/debug will be highly appreciated.

I got the solution of to prevent above heap corruption by calling NativeLibrary methods of PropertyHook in another thread. Somehow by calling NativeLibrary methods in different thread heap is not getting corrupted and sub-sequently JVM is not being crashed.

How to pass java.util.Date to Java library with help of php-java bridge

Im using javabridge to connect php to jasper reports and Im trying to pass two parameters but I get warnings and errors
Warning: Unchecked exception detected: [[o:Response$UndeclaredThrowableErrorMarker]:"FATAL: Undeclared java.lang.RuntimeException detected. java.lang.Exception: CreateInstance failed: new java.util.Date((o:String)[o:String]). Cause: java.lang.IllegalArgumentException VM: 1.7.0_79#http://java.oracle.com/" at: #-10 java.util.Date.parse(Unknown Source) #-9 java.util.Date.<init>(Unknown Source) #-8 sun.reflect.GeneratedConstructorAccessor57.newInstance(Unknown Source) #-7 sun.reflect.DelegatingConstructorAccessor[...]/java/Java.inc(361): java_Arg->getResult(false) #2 http://localhost:8080/JavaBridgeTemplate/java/Java.inc(364): java_Client->getWrappedResult(false) #3 http://localhost:8080/JavaBridgeTemplate/java/Java.inc(536): java_Client->getInternalResult() #4 http://localhost:8080/JavaBridgeTemplate/java/Java.inc(1930): java_Client->createObject('java.util.Date', Array) #5 C:\wamp\www\advanced\backend\javabridge\generate.php(49): Java->Java('java.util.Date', '12/Feb/16') #6 {main}] in http://localhost:8080/JavaBridgeTemplate/java/Java.inc on line 202
Fatal error: Uncaught [[o:Exception]:"java.lang.Exception: Invoke failed: [[c:JasperFillManager]]->fillReport((o:JasperReport)[o:JasperReport], (i:Map)[o:HashMap], (i:Connection)[o:Connection]). Cause: net.sf.jasperreports.engine.JRException: Incompatible php.java.bridge.Response$UndeclaredThrowableErrorMarker value assigned to parameter FInicio in the Reubicados dataset. VM: 1.7.0_79#http://java.oracle.com/" at: #-16 net.sf.jasperreports.engine.fill.JRFillDataset.setParameter(JRFillDataset.java:903) #-15 net.sf.jasperreports.engine.fill.JRFillDataset.setFillParameterValues(JRFillDataset.java:642) #-14 net.sf.jasperreports.engine.fill.JRFillDataset.setParameterValues(JRFillDataset.java:585) #-13 net.sf.jasperreports.engine.fill.JRBaseFiller.setParameters(JRBaseFiller.java:1280) #-12 net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:901) #-11 net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:845) #-10 net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:58) #-9 net.sf.jas in http://localhost:8080/JavaBridgeTemplate/java/Java.inc on line 195
The problem is when it tries to create java.util.Date instance. Here´s php file:
<?php
require_once("http://localhost:8080/JavaBridgeTemplate/java/Java.inc");
try {
$Param1 = date('d/M/y', strtotime($_POST['FInicio']));
$Param2 = date('d/M/y', strtotime($_POST['FFin']));
$jasperxml = new java("net.sf.jasperreports.engine.xml.JRXmlLoader");
$jasperDesign = $jasperxml->load(realpath("Reubicados.jrxml"));
$query = new java("net.sf.jasperreports.engine.design.JRDesignQuery");
$jasperDesign->setQuery($query);
$compileManager = new JavaClass("net.sf.jasperreports.engine.JasperCompileManager");
$report = $compileManager->compileReport($jasperDesign); } catch (JavaException $ex) {
echo $ex; }
$fillManager = new JavaClass("net.sf.jasperreports.engine.JasperFillManager"); //aqui se pasan los parametros (Fecha Inicio y Fecha Fin)
$params = new Java("java.util.HashMap");
$date=new Java('java.util.Date',$Param1);
$date1=new Java('java.util.Date',$Param2);
$params->put("FInicio",$date);
$params->put("FFin",$date1);
$class = new JavaClass("java.lang.Class"); $class->forName("com.mysql.jdbc.Driver"); $driverManager = new JavaClass("java.sql.DriverManager");
//db username and password
$conn = $driverManager->getConnection("jdbc:mysql://localhost/viajestrafico?zeroDateTimeBehavior=convertToNull", "root", "root"); $jasperPrint = $fillManager->fillReport($report, $params, $conn);
$exporter = new java("net.sf.jasperreports.engine.JRExporter");
And sql query in ireports:
SELECT
ayudante_situacion_laboral.`FechaInicio` AS ayudante_situacion_laboral_FechaInicio,
ayudante_situacion_laboral.`FechaFin` AS ayudante_situacion_laboral_FechaFin,
ayudante_situacion_laboral.`Cant_Horas` AS ayudante_situacion_laboral_Cant_Horas,
ayudante_situacion_laboral.`Descripcion` AS ayudante_situacion_laboral_Descripcion,
ayudante.`Registro` AS ayudante_Registro,
ayudante.`Nombre` AS ayudante_Nombre,
situacion_laboral.`Estado` AS situacion_laboral_Estado
FROM
`ayudante` ayudante INNER JOIN `ayudante_situacion_laboral` ayudante_situacion_laboral ON ayudante.`Ayudante_ID` = ayudante_situacion_laboral.`AyudanteAyudante_ID`
INNER JOIN `situacion_laboral` situacion_laboral ON ayudante_situacion_laboral.`Situacion_LaboralSitL_ID` = situacion_laboral.`SitL_ID`
WHERE
situacion_laboral.Estado = 'Reubicado' and $P{FInicio}<= ayudante_situacion_laboral.`FechaInicio` and $P{FFin}>=ayudante_situacion_laboral.`FechaFin`
UNION
SELECT
chofer_situacion_laboral.`FechaInicio` AS chofer_situacion_laboral_FechaInicio,
chofer_situacion_laboral.`FechaFin` AS chofer_situacion_laboral_FechaFin,
chofer_situacion_laboral.`Cant_Horas` AS chofer_situacion_laboral_Cant_Horas,
chofer_situacion_laboral.`Descripcion` AS chofer_situacion_laboral_Descripcion,
chofer.`Registro` AS chofer_Registro,
chofer.`Nombre` AS chofer_Nombre,
situacion_laboral.`Estado` AS situacion_laboral_Estado
FROM
`chofer` chofer INNER JOIN `chofer_situacion_laboral` chofer_situacion_laboral ON chofer.`Chofer_ID` = chofer_situacion_laboral.`ChoferChofer_ID`
INNER JOIN `situacion_laboral` situacion_laboral ON chofer_situacion_laboral.`Situacion_LaboralSitL_ID` = situacion_laboral.`SitL_ID`
WHERE
(situacion_laboral.Estado = 'Reubicado' and $P{FInicio}<= chofer_situacion_laboral.`FechaInicio` and $P{FFin}>=chofer_situacion_laboral.`FechaFin`)

Looking to your error message, the java.util.Date cannot be created with '12/Feb/16':
java_Client->createObject('java.util.Date', Array)
#5 C:\wamp\www\advanced\backend\javabridge\generate.php(49):
Java->Java('java.util.Date', '12/Feb/16') #6 {main}] in
If you want to instanciate a java date object, use the java.util.Date(long date) constructor which accepts a timestamp expressed in milliseconds :
<?php
$startDate = $_POST['FInicio']; // better to filter this :)
$Param1 = strtotime($startDate) * 1000; // to get milliseconds
if ($Param1 == 0) {
throw new Exception("FInicio date parameter could not be parsed");
}
// ...
$javaDate = new Java('java.util.Date',$Param1); // This is a java date
Your $date parameter should now be a valid java.util.Date object.
You can test it :
$simpleDateFormat = new Java("java.text.SimpleDateFormat", 'yyyy-MM-dd');
echo $simpleDateFormat->format($javaDate);
// should print your date in Y-m-d format
Alternatively, you can parse the date in Java through the java.text.SimpleDateFormatter object:
$date = '2016-12-21';
$simpleDateFormat = new Java("java.text.SimpleDateFormat", 'yyyy-MM-dd');
$javaDate = $simpleDateFormat->parse($date); // This is a Java date
Both approaches works...
JasperReport issue with date
Not exactly linked to your question, but if you want to use your Date as a query parameter you should use the java.sql.Date(long date) object instead of java.util.Date... Here's a little dirty snippet to summarize changes:
// php
$sqlDate = new Java('java.sql.Date', strtotime($_POST['FInicio']) * 1000));
$params->put('FInicio', $sqlDate);
// in your report header (.jrxml):
<parameter name="FInicio" class="java.sql.Date">
// in your report query (.jrxml):
$P{FInicio} <= chofer_situacion_laboral.`FechaInicio`
You can also have a look to the soluble-japha javabridge client (refactored Java.inc client), the syntax differs a bit but there's a documentation about dates that might reveal useful.

It was simple, just a problem I had from the beginning in php code.
$query = new java("net.sf.jasperreports.engine.design.JRDesignQuery");
$jasperDesign->setQuery($query);
This code was preventing xrml query from executing, because it was creating a query object empty.

Json as parameter to Grails controller

I am trying to pass a Json array to a Grails controller and then to a Java class. I can't figure out how to properly pass my params to the Java class though. Here is the relavent code.
AJAX POST:
$('#matrixForm').submit(function(e) {
e.preventDefault();
var matrixArray = $(this).serializeArray();
$.ajax({
type: "POST",
data: matrixArray,
url: "/turingpages/factorize/create",
success: function(data) {
//USE DATA
}
});
});
Grails Controller:
...
def create() {
MatrixFactorization m = new MatrixFactorization(params)
Gson gson = new Gson()
def jsonMatrix = gson.toJson(m.answer)
render jsonMatrix
}
...
MatrixFactorization Constructor:
public MatrixFactorization(JsonElement jsonarray) {
BlockRealMatrix R = GsonMatrix.toMatrix(jsonarray);
this.run(R);
}
My console shows my Json array as:
[{name:"00", value:"1"}, {name:"01", value:"2"}, {name:"02", value:"3"}, {name:"10", value:"4"}, {name:"11", value:"0"}, {name:"12", value:"4"}, {name:"20", value:"0"}, {name:"21", value:"4"}, {name:"22", value:"2"}]
My stack trace is:
| Error 2013-01-18 00:30:23,792 [http-bio-8080-exec-4] ERROR errors.GrailsExceptionResolver - GroovyRuntimeException occurred when processing request: [POST] /turingpages/factorize/create - parameters:
21: 4
20: 0
10: 4
22: 2
00: 1
01: 2
11: 0
02: 3
12: 4
failed to invoke constructor: public matrices.MatrixFactorization(com.google.gson.JsonElement) with arguments: [] reason: java.lang.IllegalArgumentException: wrong number of arguments. Stacktrace follows:
Message: failed to invoke constructor: public matrices.MatrixFactorization(com.google.gson.JsonElement) with arguments: [] reason: java.lang.IllegalArgumentException: wrong number of arguments
Line | Method
->> 15 | create in turingpages.rest.MFController$$ENuqtska
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 195 | doFilter in grails.plugin.cache.web.filter.PageFragmentCachingFilter
| 63 | doFilter in grails.plugin.cache.web.filter.AbstractFilter
| 1110 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 603 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 722 | run in java.lang.Thread
I am very new to using JSON. Any help is appreciated. Thanks.

1.
jQuery will pass this data as request parameters, not JSON, by default. So you should build a JSON string to pass to jQuery. I can recommend you JSON 3 library. At this case it going to be:
$.ajax({
type: "POST",
data: JSON.stringify(matrixArray),
url: "/turingpages/factorize/create",
success: function(data) {
//USE DATA
}
});
2.
On server side you could also use standard Grails JSON converter (but you could use Gson, if you prefer), see http://grails.org/Converters+Reference.
At this case you can use
def create() {
MatrixFactorization m = new MatrixFactorization(request.JSON)
render m.answer as JSON
}

How to create a local variable with ASM?

I'm trying to patch a class with ASM. I need to add some logic in a function. This logic needs a new local variable. Here is what I've done:
class CreateHashTableMethodAdapter extends MethodAdapter {
#Override
public void visitMethodInsn(int opcode, String owner,String name, String desc){
System.out.println(opcode + "/" + owner + "/" + name + "/" + desc);
if(opcode == Opcodes.INVOKESPECIAL &&
"javax/naming/InitialContext".equals(owner) &&
"<init>".equals(name) &&
"()V".equals(desc)){
System.out.println("In mod");
// 83: new #436; //class javax/naming/InitialContext
// 86: dup
mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "javax/naming/InitialContext", "<init>", "()V");
mv.visitVarInsn(Opcodes.ASTORE, 1);
Label start_patch = new Label();
Label end_patch = new Label();
mv.visitLabel(start_patch);
mv.visitTypeInsn(Opcodes.NEW,"java/util/Hashtable");
mv.visitInsn(Opcodes.DUP);
mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/util/Hashtable", "<init>", "()V");
mv.visitVarInsn(Opcodes.ASTORE,9);
// ........ sNip ..........
mv.visitLabel(end_patch);
mv.visitLocalVariable("env","Ljava/util/Hashtable;",null,start_patch,end_patch,9);
// 127: astore_1
}
else {
mv.visitMethodInsn(opcode, owner, name, desc);
}
}
}
When I run this method adapter against CheckClassAdapter it states:
org.objectweb.asm.tree.analysis.AnalyzerException: Error at instruction 51: Trying to access an inexistant local variable 9
.... sNiP ....
00050 R R . . . : R R : INVOKESPECIAL java/util/Hashtable.<init> ()V
00051 R R . . . : R : ASTORE 9
I think I misuse the visitLocalVariable, but I can not find out where I'm supposed to call it.
When I javap generated bytecode (without checking), I get the following local variables table:
LocalVariableTable:
Start Length Slot Name Signature
91 40 9 env Ljava/util/Hashtable;
0 343 0 this Lpmu/jms/ServerJMS;
132 146 1 initialContext Ljavax/naming/InitialContext;
153 125 2 topicConnectionFactory Ljavax/jms/TopicConnectionFactory;
223 55 3 topic Ljavax/jms/Topic;
249 29 4 topicSubscriber Ljavax/jms/TopicSubscriber;
279 55 1 ex Ljava/lang/Exception;
281 53 2 codeMessage I
289 45 3 params Lpmu/data/Parameters;
325 9 4 messageError Ljava/lang/String;
As you may notice, my variable is here but topmost ?!
Any idea ?

One convenient way to create new local variables is to extend LocalVariablesSorter instead of MethodAdapter. Then you can allocate local variables as needed using newLocal() without interfering with existing variables. See section 3.3.3 of the ASM 4.0 A Java bytecode engineering library on the ASM homepage for details.

Dphibernate. Proxy initialized false

I need advice. My server application send objects with not
inialized proxies. Primitive types ok, but onetomany and etc. not
initialized proxies. As result my client application gets nothing when
retreive received object properties.
here is sample with src and conf files without libs
project on github
here is server log, where you can see that objects were retreive from
database and send with proxyinitialized = false
{operation})****************getEnhancements
00:53:36,906 DEBUG http-8080-1 FacadeService:getEnhancements:31 -
collect enhancements
Hibernate:
select
this_.id as id1_0_,
this_.description as descript2_1_0_,
this_.name as name1_0_,
this_.priceValue as priceValue1_0_,
this_.requestedDataFile_id as requeste5_1_0_,
this_.resultedDataFile_id as resulted6_1_0_
from
Enhancement this_
00:53:37,031 DEBUG http-8080-1 FacadeService:getEnhancements:34 -
return enhancements:
[com.garageteam.photoenhancer.model.misc.Enhancement#22,
com.garageteam.photoenhancer.model.misc.Enhancement#25,
com.garageteam.photoenhancer.model.misc.Enhancement#28]
{invoke} 125
{serialize} 15
[BlazeDS]02/14/2012 00:53:37.062 [DEBUG] [Service.Remoting] Adapter
'dpHibernateRemotingAdapter' called
'null.getEnhancements(java.util.Arrays$ArrayList (Collection size:0)
)'
[BlazeDS]02/14/2012 00:53:37.062 [DEBUG] [Service.Remoting] Result:
'java.util.ArrayList (Collection size:3)
[0] = ASObject(22809745){id=3, uid=206a60dd-2fa6-4a20-bcf4-
bf39684948b5, description=, name=cool, proxyKey=3,
requestedDataFile=ASObject(4002470)
{uid=12283196-3a44-4558-914c-95b3c5443f95, proxyKey=1,
proxyInitialized=false}, resultedDataFile=ASObject(26432381)
{uid=69f842b5-e9b7-4279-be51-3e6c72558aac, proxyKey=2,
proxyInitialized=false}, priceValue=1.0, proxyInitialized=true}
[1] = ASObject(21904789){id=6, uid=9dc2c08c-
da0b-4047-95ab-0e1a06cf03b7, description=, name=woov, proxyKey=6,
requestedDataFile=ASObject(28121199){uid=1968dfa7-f3d1-41ed-
b55b-47efbe09dfcc, proxyKey=4, proxyInitialized=false},
resultedDataFile=ASObject(18831011){uid=9c3e3c3b-7698-4b01-bcd4-
d58e4e6635a0, proxyKey=5, proxyInitialized=false}, priceValue=2.0,
proxyInitialized=true}
[2] = ASObject(7405703){id=9, uid=325fe743-4e2c-4d9b-9c01-
ebdb03ad1fea, description=, name=supercool, proxyKey=9,
requestedDataFile=ASObject(14262090){uid=89ee7148-78a0-450a-afe1-
b638a2b40256, proxyKey=7, proxyInitialized=false},
resultedDataFile=ASObject(23654984)
{uid=888141a6-20df-40ed-861d-4968bd5d8042, proxyKey=8,
proxyInitialized=false}, priceValue=3.0, proxyInitialized=true}
'
[BlazeDS]02/14/2012 00:53:37.062 [DEBUG] [Endpoint.AMF] Serializing
AMF/HTTP response
Version: 3
(Message #0 targetURI=/3/onResult, responseURI=)
(Typed Object #0 'flex.messaging.messages.AcknowledgeMessage')
timestamp = 1.329170017062E12
headers = (Object #1)
body = (Externalizable Object #2
'flex.messaging.io.ArrayCollection')
(Array #3)
[0] = (Typed Object #4
'com.garageteam.photoenhancer.model.misc.Enhancement')
id = 3
uid = "206a60dd-2fa6-4a20-bcf4-bf39684948b5"
description = ""
name = "cool"
proxyKey = 3
requestedDataFile = (Typed Object #5
'com.garageteam.photoenhancer.model.misc.DataFile')
uid = "12283196-3a44-4558-914c-95b3c5443f95"
proxyKey = 1
proxyInitialized = false
resultedDataFile = (Typed Object #6
'com.garageteam.photoenhancer.model.misc.DataFile')
uid = "69f842b5-e9b7-4279-be51-3e6c72558aac"
proxyKey = 2
proxyInitialized = false
priceValue = 1.0
proxyInitialized = true
[1] = (Typed Object #7
'com.garageteam.photoenhancer.model.misc.Enhancement')
id = 6
uid = "9dc2c08c-da0b-4047-95ab-0e1a06cf03b7"
description = ""
name = "woov"
proxyKey = 6
requestedDataFile = (Typed Object #8
'com.garageteam.photoenhancer.model.misc.DataFile')
uid = "1968dfa7-f3d1-41ed-b55b-47efbe09dfcc"
proxyKey = 4
proxyInitialized = false
resultedDataFile = (Typed Object #9
'com.garageteam.photoenhancer.model.misc.DataFile')
uid = "9c3e3c3b-7698-4b01-bcd4-d58e4e6635a0"
proxyKey = 5
proxyInitialized = false
priceValue = 2.0
proxyInitialized = true
[2] = (Typed Object #10
'com.garageteam.photoenhancer.model.misc.Enhancement')
id = 9
uid = "325fe743-4e2c-4d9b-9c01-ebdb03ad1fea"
description = ""
name = "supercool"
proxyKey = 9
requestedDataFile = (Typed Object #11
'com.garageteam.photoenhancer.model.misc.DataFile')
uid = "89ee7148-78a0-450a-afe1-b638a2b40256"
proxyKey = 7
proxyInitialized = false
resultedDataFile = (Typed Object #12
'com.garageteam.photoenhancer.model.misc.DataFile')
uid = "888141a6-20df-40ed-861d-4968bd5d8042"
proxyKey = 8
proxyInitialized = false
priceValue = 3.0
proxyInitialized = true
correlationId = "A01CE051-DFDD-6914-4308-78B4E961321B"
messageId = "8BB1B217-C60E-32D4-9FD3-7A9BB427085E"
timeToLive = 0.0
clientId = "8AE5EEA5-0008-798D-0980-4DC9F378C296"
destination = null
00:53:37,093 DEBUG http-8080-1 DispatcherServlet:doDispatch:822 - Null
ModelAndView returned to DispatcherServlet with name
'springMessageBroker': assuming HandlerAdapter completed request
handling
00:53:37,093 DEBUG http-8080-1 DispatcherServlet:processRequest:674 -
Successfully completed request

Are you using the dpHibernate RemoteObject object or the standard flex/blazeds RemoteObject tag. It looks like the server is returning the right proxy objects, so the problem should be client side. And if you are not using the dpHibernate RemoteObject tag to make the request, dpHibernate can't proxy load the lazy items for you. Also use a tool like service capture to see if the calls backs to the server are happening and that there isn't a server error being returned from your load method.