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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - lldb crashes when reading a core file"
href="https://llvm.org/bugs/show_bug.cgi?id=25106">25106</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>lldb crashes when reading a core file
</td>
</tr>
<tr>
<th>Product</th>
<td>lldb
</td>
</tr>
<tr>
<th>Version</th>
<td>3.7
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>lldb-dev@lists.llvm.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>vrba@mixedrealities.no
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=15031" name="attach_15031" title="Minimal test case needed to reproduce the bug; 7z archive">attachment 15031</a> <a href="attachment.cgi?id=15031&action=edit" title="Minimal test case needed to reproduce the bug; 7z archive">[details]</a></span>
Minimal test case needed to reproduce the bug; 7z archive
I compile the attached C++ program with clang++ z.cc, run it and receive
segmentation fault as expected. lldb crashes when trying to load the produced
core file:
vrba@zax:/tmp$ lldb
(lldb) target create -c core a.out
Segmentation fault
gdb has no problems with loading the core file and showing the source.
vrba@zax:/tmp$ clang++ --version
Debian clang version 3.7.0-svn247539-1~exp1 (branches/release_37) (based on
LLVM 3.7.0)
Target: x86_64-pc-linux-gnu
Thread model: posix
[I have installed Debian packages provided by the LLVM project.]
The attached archive contains the source code, the executable and the produced
core file.
This is the stack trace when lldb crashed:
#0 0x00007ffff6579120 in lldb_private::ArchSpec::GetMachine() const ()
from /usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#1 0x00007ffff691674f in
RegisterContextPOSIX_x86::RegisterContextPOSIX_x86(lldb_private::Thread&,
unsigned int, lldb_private::RegisterInfoInterface*) () from
/usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#2 0x00007ffff75be764 in
RegisterContextCorePOSIX_x86_64::RegisterContextCorePOSIX_x86_64(lldb_private::Thread&,
lldb_private::RegisterInfoInterface*, lldb_private::DataExtractor const&,
lldb_private::DataExtractor const&) ()
from /usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#3 0x00007ffff75bf212 in
ThreadElfCore::CreateRegisterContextForFrame(lldb_private::StackFrame*) ()
from /usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#4 0x00007ffff75becdb in ThreadElfCore::GetRegisterContext() () from
/usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#5 0x00007ffff69b97cc in lldb_private::StackFrameList::GetFramesUpTo(unsigned
int) ()
from /usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#6 0x00007ffff69ba22b in
lldb_private::StackFrameList::ResetCurrentInlinedDepth() ()
from /usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#7 0x00007ffff69e0242 in
lldb_private::Thread::ShouldStop(lldb_private::Event*) ()
from /usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#8 0x00007ffff69e68f6 in
lldb_private::ThreadList::ShouldStop(lldb_private::Event*) ()
from /usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#9 0x00007ffff69a3ad3 in
lldb_private::Process::ShouldBroadcastEvent(lldb_private::Event*) ()
from /usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#10 0x00007ffff69a3bb1 in
lldb_private::Process::HandlePrivateEvent(std::shared_ptr<lldb_private::Event>&)
()
from /usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#11 0x00007ffff69a6a1c in lldb_private::Process::RunPrivateStateThread(bool) ()
from /usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#12 0x00007ffff66d1eb2 in
lldb_private::HostNativeThreadBase::ThreadCreateTrampoline(void*) ()
from /usr/lib/x86_64-linux-gnu/liblldb-3.7.so
#13 0x00007ffff5a3a0a4 in start_thread (arg=0x7fffeedd8700) at
pthread_create.c:309
#14 0x00007ffff491704d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111</pre>
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