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<head>
<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 --- - deadlock when calling SBThread::GetSelectedFrame"
href="https://llvm.org/bugs/show_bug.cgi?id=30526">30526</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>deadlock when calling SBThread::GetSelectedFrame
</td>
</tr>
<tr>
<th>Product</th>
<td>lldb
</td>
</tr>
<tr>
<th>Version</th>
<td>3.9
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</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>cc.tapa@gmail.com
</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>I have thread working with lldb events.
void LLDBRunner::eventsThread()
{
while (1)
{
lldb::SBEvent ev;
m_debugData->listener.WaitForEvent(UINT32_MAX, ev);
lldb::SBThread thread = m_debugData->currentProcess.GetSelectedThread();
lldb::SBFrame frame = thread.GetSelectedFrame();
}
}
Sometimes(but not always) this thread hangs up when calling
thread.GetSelectedFrame();
Call stack:
liblldb.dll!llvm::sys::MutexImpl::acquire() Line 41 C++
liblldb.dll!llvm::sys::SmartMutex<0>::lock() Line 101 C++
liblldb.dll!llvm::sys::SmartScopedLock<0>::SmartScopedLock<0>(llvm::sys::SmartMutex<0>
& m) Line 147 C++
liblldb.dll!lldb_private::ProcessWindowsLive::DoReadMemory(unsigned
__int64 vm_addr, void * buf, unsigned int size, lldb_private::Error & error)
Line 704 C++
liblldb.dll!lldb_private::Process::ReadMemoryFromInferior(unsigned __int64
addr, void * buf, unsigned int size, lldb_private::Error & error) Line 2506
C++
liblldb.dll!lldb_private::MemoryCache::Read(unsigned __int64 addr, void *
dst, unsigned int dst_len, lldb_private::Error & error) Line 268 C++
liblldb.dll!lldb_private::Process::ReadMemory(unsigned __int64 addr, void
* buf, unsigned int size, lldb_private::Error & error) Line 2355 C++
liblldb.dll!lldb_private::RegisterContext::ReadRegisterValueFromMemory(const
lldb_private::RegisterInfo * reg_info, unsigned __int64 src_addr, unsigned int
src_len, lldb_private::RegisterValue & reg_value) Line 409 C++
liblldb.dll!lldb_private::RegisterContextLLDB::ReadRegisterValueFromRegisterLocation(lldb_private::UnwindLLDB::RegisterLocation
regloc, const lldb_private::RegisterInfo * reg_info,
lldb_private::RegisterValue & value) Line 1083 C++
liblldb.dll!lldb_private::RegisterContextLLDB::ReadGPRValue(lldb::RegisterKind
register_kind, unsigned int regnum, unsigned __int64 & value) Line 1919 C++
liblldb.dll!lldb_private::RegisterContextLLDB::ReadPC(unsigned __int64 &
pc) Line 2066 C++
liblldb.dll!lldb_private::UnwindLLDB::GetOneMoreFrame(lldb_private::ABI *
abi) Line 265 C++
liblldb.dll!lldb_private::UnwindLLDB::AddOneMoreFrame(lldb_private::ABI *
abi) Line 357 C++
liblldb.dll!lldb_private::UnwindLLDB::UpdateUnwindPlanForFirstFrameIfInvalid(lldb_private::ABI
* abi) Line 332 C++
liblldb.dll!lldb_private::UnwindLLDB::AddFirstFrame() Line 118 C++
liblldb.dll!lldb_private::UnwindLLDB::DoGetFrameInfoAtIndex(unsigned int
idx, unsigned __int64 & cfa, unsigned __int64 & pc) Line 422 C++
liblldb.dll!lldb_private::Unwind::GetFrameInfoAtIndex(unsigned int
frame_idx, unsigned __int64 & cfa, unsigned __int64 & pc) Line 72 C++
liblldb.dll!lldb_private::StackFrameList::GetFramesUpTo(unsigned int
end_idx) Line 299 C++
liblldb.dll!lldb_private::StackFrameList::GetFrameAtIndex(unsigned int
idx) Line 541 C++
liblldb.dll!lldb_private::Thread::GetSelectedFrame() Line 364 C++
liblldb.dll!lldb::SBThread::GetSelectedFrame() Line 1471 C++
ssl-rt.dll!Debugger::LLDBRunner::checkCurrentFunctionIsOkey() Line 143
C++
ssl-rt.dll!Debugger::LLDBRunner::eventsThread() Line 263 C++</pre>
</div>
</p>
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