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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - GDBJITRegistrar not thread-safe (makes MCJIT not thread-safe)"
href="http://llvm.org/bugs/show_bug.cgi?id=15750">15750</a>
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<th>Summary</th>
<td>GDBJITRegistrar not thread-safe (makes MCJIT not thread-safe)
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Generic Execution Engine Support
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>jim.kearney@oracle.com
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>GDBJITRegistrar::(de)registerObject() accesses a member variable
ObjectBufferMap without any synchronization. The class is used as a singleton
and so multiple instances of MCJIT try to modify that map simultaneously.
The code is written to be thread-safe with its access to gdb variables but not
with its own state, which is strange given its singleton nature.
Also, JITRegistrar::getGDBRegistrar should use ManagedStatic. The
initialization pattern it uses is not guaranteed thread-safe.</pre>
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