[SOLVED] Crash of application.

[rahul.ranjan]

I am loading the world through unigine as following,

 

char cWorldPath[] = "world_load XYZ/XYZ";
Unigine::Engine *engine = Unigine::Engine::get();
Unigine::Console * console = Unigine::Console::get();
console->setActivity(1);
console->run(cWorldPath);
console->flush();
console->setActivity(0);


int iNumPlugin = engine->findPlugin("MyPlugin");
MyPlugin *pPlugin = (MyPlugin*) engine->getPluginData(iNumPlugin);
pPlugin->isWorldLoad();  // this function checks world is loaded or not and if loaded it loads tracks. 

 

everything is fine so far, but when I load the second world through the same process and try to call the plugin functions for rendering I get an Assertion as follows,

 

---------------------------

Microsoft Visual C++ Runtime Library

---------------------------

Assertion failed!

 

Program: ...

File: U:\source\engine\EngineInterpreter.h

Line: 86

 

Expression: depth < NUM_INSTANCES && "EngineInterpreterInstance::begin(): stack overflow"

 

For information on how your program can cause an assertion

failure, see the Visual C++ documentation on asserts

 

(Press Retry to debug the application - JIT must be enabled)

---------------------------

Abort   Retry   Ignore   

---------------------------

 

I tried debugging throught the code and figured out that the problem seems to be in,

 

void Machine::run(int begin,Interpreter::Context *context)

 

which throws an access violation 

 

First-chance exception at 0x000007fed3f91e56 (.dll) in XYZ .exe: 0xC0000005: Access violation reading location 0x0000000000000208.

 

on evey call to it, the trace to which is as follows,

TRACE:

Machine::run(int begin, Interpreter::Context * context)  Line 57 C++

Interpreter::runFunction(int function, int num_args, const Variable * args)  Line 6545 C++

Interpreter::runFunction(const char * name, int num_args, const Variable * args)  Line 6475 C++

Interpreter::runFunction(const Variable & name, int num_args, const Variable * args)  Line 6470 C++

Unigine::run_system_function(const Unigine::Variable & name)  Line 1144 + 0x19 bytes C++

MyPlugin.dll!MyPlugin::cut()  Line 41 + 0x40 bytes C++

MyPlugin.dll!MyPlugin::setIndex(SWITCHER_LAYER _layer)  Line 78 C++

 

the execution is lost from the SWITCH case not sure where exactly but mostly in the CASE(CALLECFR).

So what am I missing here, is there any closing steps needed to be undertaken before loading a new world or any reinitialization required before calling plugin functions?

 

[silent]

Hi Rahul,

 

Could you please provide a small test sample (with plugin C++ code as well) so we can check it?

 

Thanks!

[rahul.ranjan]

Hi Andrey,
Thanks for reply,
I will provide you an exact scenario of our application and same plugin code.

codes in the first thread is

//These code are continously executed
Unigine::Engine *engine = Unigine::Engine::get();
int iNumPlugin = engine->findPlugin("MyPlugin");
MyPlugin *pPlugin = (MyPlugin*) engine->getPluginData(iNumPlugin);
while(1)
{
   pPlugin->cut();
}

In other thread

//Executed for loading world
char cWorldPath[] = "world_load XYZ/XYZ";
Unigine::Engine *engine = Unigine::Engine::get();
Unigine::Console * console = Unigine::Console::get();
console->setActivity(1);
console->run(cWorldPath);
console->flush();

Plugin

void MyPlugin::cut()
{
  Unigine::Engine *engine = Unigine::Engine::get();
  engine->runSystemFunction("cut");
}
int MyPlugin::init()
{
   MyPlugin  m_MyPluginObj;
   Unigine::Interpreter::addExternLibrary("m_MyPluginObj");
   Unigine::Interpreter::addExternFunction("m_MyPluginObj.cut",MakeExternObjectFunction(m_MyPluginObj,&MyPlugin::cut));
return 1;
}

System Script

 

using Unigine::Tracker;
Unigine::Tracker::TrackerTrack track;
Tracker tracker = new Tracker();
void cut() { track = tracker.loadTrack(trackPath[selection]); //different tracks are being loaded
track.set(1.0f);
}

It works fine until the first time the world is loaded while loading the second time it crashes.

if I comment the code:-

track.set(1.0f);

in script side then the application do not crash but I need to set time for track.

 

Thanks.

[rahul.ranjan]

hi

Finally, it's resolved, as it needs to delete track variable each time world gets unload in world shutdown and should be recreated each time a new world is loaded to avoid memory leakage.