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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Deadlock on ctrl-c"
href="http://llvm.org/bugs/show_bug.cgi?id=22272">22272</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Deadlock on ctrl-c
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</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>Support Libraries
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rafael.espindola@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
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<div>
<pre>I noticed that llvm-tblgen sometimes deadlocks if it gets a SIGINT. This time I
managed to get a backtrace. The problem is that we try to allocate memory from
a signal handler:
#0 0x00007fc20c6952ac in __lll_lock_wait_private () from /lib64/libc.so.6
#1 0x00007fc20c60a8bc in malloc () from /lib64/libc.so.6
#2 0x00007fc20cec2608 in operator new(unsigned long) () from
/lib64/libstdc++.so.6
#3 0x00007fc20d37e134 in void*
llvm::object_creator<llvm::sys::SmartMutex<true> >() () from
/home/espindola/llvm/build/bin/../lib/libLLVMSupport.so
#4 0x00007fc20d378725 in llvm::ManagedStaticBase::RegisterManagedStatic(void*
(*)(), void (*)(void*)) const () from
/home/espindola/llvm/build/bin/../lib/libLLVMSupport.so
#5 0x00007fc20d37dd4a in llvm::ManagedStatic<llvm::sys::SmartMutex<true>
<span class="quote">>::operator*() () from /home/espindola/llvm/build/bin/../lib/libLLVMSupport.so</span >
#6 0x00007fc20d3ec5bc in SignalHandler(int) () from
/home/espindola/llvm/build/bin/../lib/libLLVMSupport.so
#7 <signal handler called>
#8 0x00007fc20c60b180 in free () from /lib64/libc.so.6
#9 0x00007fc20d1cdef0 in llvm::SmallVectorImpl<unsigned
int>::~SmallVectorImpl() () from
/home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#10 0x00007fc20d1cde85 in llvm::SmallVector<unsigned int, 32u>::~SmallVector()
() from /home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#11 0x00007fc20d1a7f15 in llvm::FoldingSetNodeID::~FoldingSetNodeID() () from
/home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#12 0x00007fc20d1a57bf in llvm::BitsInit::get(llvm::ArrayRef<llvm::Init*>) ()
from /home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#13 0x00007fc20d1a8668 in llvm::BitsInit::resolveReferences(llvm::Record&,
llvm::RecordVal const*) const () from
/home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#14 0x00007fc20d1b0fcf in llvm::Record::resolveReferencesTo(llvm::RecordVal
const*) () from /home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#15 0x00007fc20d1ecb60 in
llvm::TGParser::ResolveMulticlassDefArgs(llvm::MultiClass&, llvm::Record*,
llvm::SMLoc, llvm::SMLoc, std::vector<llvm::Init*, std::allocator<llvm::Init*>
<span class="quote">> const&, std::vector<llvm::Init*, std::allocator<llvm::Init*> >&, bool) ()</span >
from /home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#16 0x00007fc20d1ed4f6 in llvm::TGParser::ParseDefm(llvm::MultiClass*) () from
/home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#17 0x00007fc20d1eabe2 in llvm::TGParser::ParseObject(llvm::MultiClass*) ()
from /home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#18 0x00007fc20d1eac92 in llvm::TGParser::ParseObjectList(llvm::MultiClass*) ()
from /home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#19 0x00007fc20d1edba9 in llvm::TGParser::ParseFile() () from
/home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#20 0x00007fc20d19c9f0 in llvm::TableGenMain(char*, bool
(*)(llvm::raw_ostream&, llvm::RecordKeeper&)) () from
/home/espindola/llvm/build/bin/../lib/libLLVMTableGen.so
#21 0x00000000005ef8fe in main ()</pre>
</div>
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