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<base href="https://bugs.llvm.org/">
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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 - SEGV in llvm-readobj -unwind on X86-64 COFF binary"
href="https://bugs.llvm.org/show_bug.cgi?id=36742">36742</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>SEGV in llvm-readobj -unwind on X86-64 COFF binary
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>w.parker.thompson@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20064" name="attach_20064" title="Reproduction binary">attachment 20064</a> <a href="attachment.cgi?id=20064&action=edit" title="Reproduction binary">[details]</a></span>
Reproduction binary
When parsing the unwinding information in a x86-64 COFF binary (attached)
llvm-readobj segfaults.
Reproduction:
llvm-readobj -unwind ./msvs_whatever_64_O1_psftp_stripped
bt:
Format: COFF-x86-64
Arch: x86_64
AddressSize: 64bit
UnwindInformation [
RuntimeFunction {
StartAddress: (0x0)
EndAddress: (0x4)
UnwindInfoAddress: (0x8)
#0 0x000055992cc2f6b9 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(./bin/llvm-readobj+0x1d46b9)
#1 0x000055992cc2da06 llvm::sys::RunSignalHandlers()
(./bin/llvm-readobj+0x1d2a06)
#2 0x000055992cc2db5c SignalHandler(int) (./bin/llvm-readobj+0x1d2b5c)
#3 0x00007fc4bb7f9da0 __restore_rt (/usr/lib/libpthread.so.0+0x11da0)
#4 0x000055992cbace25
llvm::object::COFFObjectFile::getSectionContents(llvm::object::coff_section
const*, llvm::ArrayRef<unsigned char>&) const (./bin/llvm-readobj+0x151e25)
#5 0x000055992cb5dbbb
llvm::Win64EH::Dumper::printRuntimeFunction(llvm::Win64EH::Dumper::Context
const&, llvm::object::coff_section const*, unsigned long,
llvm::Win64EH::RuntimeFunction const&) (./bin/llvm-readobj+0x102bbb)
#6 0x000055992cb5e1d9
llvm::Win64EH::Dumper::printData(llvm::Win64EH::Dumper::Context const&)
(./bin/llvm-readobj+0x1031d9)
#7 0x000055992cad0201 (anonymous namespace)::COFFDumper::printUnwindInfo()
(./bin/llvm-readobj+0x75201)
#8 0x000055992cb48f7e dumpObject(llvm::object::ObjectFile const*,
llvm::ScopedPrinter&) (./bin/llvm-readobj+0xedf7e)
#9 0x000055992caaa5d8 main (./bin/llvm-readobj+0x4f5d8)
#10 0x00007fc4ba317f4a __libc_start_main (/usr/lib/libc.so.6+0x20f4a)
#11 0x000055992cac157a _start (./bin/llvm-readobj+0x6657a)
Stack dump:
0. Program arguments: ./bin/llvm-readobj -unwind
msvs_whatever_64_O1_psftp_stripped
[1] 26476 segmentation fault (core dumped) ./bin/llvm-readobj -unwind</pre>
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