[osg-users] Android OSG crashed in libcurl of multi-thread

[夏清然 Xia Qingran]

Hi,

I am developing a new app based on OSG 3.2.1.

For better download speed, I used a multi-threaded by following code in JNI:

==================
void OsgMainApp::loadModels() {
    if (_vModelsToLoad.size() == 0)
        return;

    osg::notify(osg::ALWAYS) << "There are " << _vModelsToLoad.size()
            << " models to load" << std::endl;

    _vTileInfoList.clear();

    downloadCacheXMl();
    _vTileInfoList = loadDataFromCacheXML();

    osgViewer::Viewer::Windows windows;
    _viewer->getWindows(windows);
    for (osgViewer::Viewer::Windows::iterator itr = windows.begin();
            itr != windows.end(); ++itr) {
        (*itr)->getState()->setUseModelViewAndProjectionUniforms(true);
        (*itr)->getState()->setUseVertexAttributeAliasing(true);
    }

    _manipulator->getNode();
    _viewer->home();

    _viewer->getDatabasePager()->clear();
    _viewer->getDatabasePager()->registerPagedLODs(_root.get());
    _viewer->getDatabasePager()->setUpThreads(3, 2);
    _viewer->getDatabasePager()->setTargetMaximumNumberOfPageLOD(2);
    _viewer->getDatabasePager()->setUnrefImageDataAfterApplyPolicy(true,
true);
=====================

I set the   _viewer->getDatabasePager()->setUpThreads(3, 2); , but it often
crashed.
However if I set _viewer->getDatabasePager()->setUpThreads(3, 2);, it is
running smoothly.

Here is the crash call stack:
********** Crash dump: **********
Build fingerprint:
'Xiaomi/lcsh92_wet_jb9/lcsh92_wet_jb9:4.2.2/JDQ39/JHDCNBH37.0:user/release-keys'
pid: 22182, tid: 22479, name: Thread-9008  >>> osg.AndroidExample <<<
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000000
Stack frame I/DEBUG   (22507):     #00  pc 00000000  <unknown>: Unable to
open symbol file
D:\mobile\workspace\osgViewer\obj\local\armeabi-v7a\/<unknown>. Error (22):
Invalid argument
Stack frame I/DEBUG   (22507):     #01  pc 00481887
/data/app-lib/osg.AndroidExample-1/libosgNativeLib.so
(osg_curl::ReaderWriterCURL::readFile(osg_curl::ObjectType, std::string
const&, osgDB::Options const*) const+630): Routine
osg_curl::ReaderWriterCURL::readFile(osg_curl::ObjectType, std::string
const&, osgDB::Options const*) const at
Z:/Code/OpenSceneGraph-3.2.1/src/osgPlugins/curl/ReaderWriterCURL.cpp:604
========================

How to solve this problem ? Thanks.

Regards
夏清然
Xia Qingran
qingran....@gmail.com
http://www.qingran.net

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