<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Aug 13, 2014 at 11:34 AM, Murali M <span dir="ltr"><<a href="mailto:murali248641@gmail.com" target="_blank">murali248641@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><span style="color:rgb(0,0,0);font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;font-size:14px;line-height:17.804800033569336px"><br>
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Any body tried qt application under jailing circumstance. </div><div><br></div><div>Need suggestions for below issue(I am using qt4.8 for TV platforms).</div></span><span style="color:rgb(0,0,0);font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;font-size:14px;line-height:17.804800033569336px"><div>
<span style="color:rgb(0,0,0);font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;font-size:14px;line-height:17.804800033569336px"><br></span></div>We are launching the qtApplication in a process. Now process is jailed(using chroot). </span><div>
<span style="color:rgb(0,0,0);font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;font-size:14px;line-height:17.804800033569336px"><br></span></div><div><span style="color:rgb(0,0,0);font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;font-size:14px;line-height:17.804800033569336px">Memory corruption occurred in the time of dlopen(platform.so) after jailing.</span><br>
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Example:</p><pre style="margin-top:0px;margin-bottom:10px;padding:5px;border:0px;font-size:14px;vertical-align:baseline;font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif;overflow:auto;width:auto;max-height:600px;word-wrap:normal;color:rgb(0,0,0);line-height:17.804800033569336px;background:rgb(238,238,238)">
<code style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif;white-space:inherit;background-image:initial;background-repeat:initial">process main()
{
mount "proc, sys, dev in /var/tt(chroot directory)"
chroot("/var/tt");
qtthread_create();
}
qtthread_create()
{
create_thread_for_qt_app using pthread apis(qtMainThread);
stack size is 256K;
}
qtMainThread()
{
Printing stack size for qtMainThread(current thread) its displayed currently(256K).
QApplication class creation(QApplication app).
Printing stack size for qtMainThread(current thread) its displayed wrongly(junk value).
app.exec();
}</code></pre><p style="margin:0px 0px 1em;padding:0px;border:0px;font-size:14px;vertical-align:baseline;clear:both;color:rgb(0,0,0);font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;line-height:17.804800033569336px;background-image:initial;background-repeat:initial">
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QApplication call trying load the platform.so using dlopen inside qt library. In that case stack size displayed wrongly.</p><p style="margin:0px 0px 1em;padding:0px;border:0px;font-size:14px;vertical-align:baseline;clear:both;color:rgb(0,0,0);font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;line-height:17.804800033569336px;background-image:initial;background-repeat:initial">
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