The Sampling tool fails on Qt-port. The problem is in the implementation of 'waitForThreadCompletion' function (wtf/ThreadingQt.cpp). I am going to attach a patch which could fix this problem on Qt-port.
Created attachment 25739 [details] fix waitForThreadCompletion for sampling tool This patch fixes the threading for sampling tool on Qt-port. I've did the same for Gtk, but I didn't test it.
Comment on attachment 25739 [details] fix waitForThreadCompletion for sampling tool > + if (result) > + *result = g_thread_join(thread); I believe this is wrong. Even if we don't want to store the result, we do want to call g_thread_join so we wait for the thread to complete.
Created attachment 25767 [details] fix waitForThreadCompletion for sampling tool (v2) You are right. I missed that one. Here is the proposed patch.
Comment on attachment 25767 [details] fix waitForThreadCompletion for sampling tool (v2) r=me
Landed in r39204.