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lldb doesn't show full stacktrace #20158

Open llvmbot opened 10 years ago

llvmbot commented 10 years ago
Bugzilla Link 19784
Version unspecified
OS Linux
Reporter LLVM Bugzilla Contributor

Extended Description

Ubuntu 14.04 64-bit. lldb-3.5 rev.201651 (packaged in Ubuntu).

lldb doesn't show full stacktrace for some functions. E.g.

(gdb) bt

​0 0x00007ff38991ffbd in poll () at ../sysdeps/unix/syscall-template.S:81

​1 0x00007ff38846afe4 in g_main_context_poll (priority=2147483647, n_fds=5, fds=0x11cbf60, timeout=550, context=0x7ff3800011f0)

at /build/buildd/glib2.0-2.40.0/./glib/gmain.c:4028

​2 g_main_context_iterate (context=context@entry=0x7ff3800011f0, block=block@entry=1, dispatch=dispatch@entry=1, self=)

at /build/buildd/glib2.0-2.40.0/./glib/gmain.c:3729

​3 0x00007ff38846b0ec in g_main_context_iteration (context=0x7ff3800011f0, may_block=1) at /build/buildd/glib2.0-2.40.0/./glib/gmain.c:3795

​4 0x00007ff38a5c27a1 in QEventDispatcherGlib::processEvents (this=0x10ecca0, flags=...) at kernel/qeventdispatcher_glib.cpp:434

​5 0x00007ff38aeb0bb6 in QGuiEventDispatcherGlib::processEvents (this=, flags=...) at kernel/qguieventdispatcher_glib.cpp:204

​6 0x00007ff38a5940af in QEventLoop::processEvents (this=this@entry=0x7fff20b93920, flags=...) at kernel/qeventloop.cpp:149

​7 0x00007ff38a5943a5 in QEventLoop::exec (this=this@entry=0x7fff20b93920, flags=...) at kernel/qeventloop.cpp:204

​8 0x00007ff38a599b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225

​9 0x0000000000626dac in main (argc=1, argv=0x7fff20b940c8) at main.cpp:387

(lldb) bt

The same issue applies to many other functions in libc.

llvmbot commented 10 years ago

Can I get you to tell me the exe you are using and the way to produce it so I can replicate your setup? I'd like to look into the libc poll backtrace failure with an identical setup to yours.

In my case it was qbittorrent compiled from branch https://github.com/sorokin/qBittorrent/tree/alerts. But I think you can reproduce this problem on any Qt program (qbittorrent doesn't do anything special).

Ok - thanks, Ivan! I'll use that when I look into this.

llvmbot commented 10 years ago

Can I get you to tell me the exe you are using and the way to produce it so I can replicate your setup? I'd like to look into the libc poll backtrace failure with an identical setup to yours.

In my case it was qbittorrent compiled from branch https://github.com/sorokin/qBittorrent/tree/alerts. But I think you can reproduce this problem on any Qt program (qbittorrent doesn't do anything special).

llvmbot commented 10 years ago

Hi Ivan,

Can I get you to tell me the exe you are using and the way to produce it so I can replicate your setup? I'd like to look into the libc poll backtrace failure with an identical setup to yours.

Thanks!

Sincerely, Todd Fiala