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      -Djdk.nativeCrypto
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      -Djdk.nativeDigest
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      -Djdk.nativeGCM
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      -Xcomp
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      -Xgcpolicy
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      -Xgcthreads
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  <li class="md-nav__item">
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      -Xgcworkpackets
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      -Xiss
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    <a href="../xjit/" title="-Xjit" class="md-nav__link">
      -Xjit
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      -Xjni
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      -Xlinenumbers
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      -Xloa
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      -Xloainitial
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      -Xloamaximum
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      -Xloaminimum
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      -XlockReservation
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      -Xlockword
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      -Xlp
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      -Xlp:codecache
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  <li class="md-nav__item">
    <a href="../xlpobjectheap/" title="-Xlp:objectheap" class="md-nav__link">
      -Xlp:objectheap
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    <a href="../xmine/" title="-Xmaxe" class="md-nav__link">
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    <a href="../xminf/" title="-Xmaxf" class="md-nav__link">
      -Xmaxf
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    <a href="../xmint/" title="-Xmaxt" class="md-nav__link">
      -Xmaxt
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    <a href="../xmca/" title="-Xmca" class="md-nav__link">
      -Xmca
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    <a href="../xmca/" title="-Xmco" class="md-nav__link">
      -Xmco
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      -Xmcrs
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      -Xmine
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      -Xminf
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      -Xmint
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    <a href="../xmn/" title="-Xmn" class="md-nav__link">
      -Xmn
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    <a href="../xmn/" title="-Xmns" class="md-nav__link">
      -Xmns
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      -Xmnx
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      -Xmo
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    <a href="../xmo/" title="-Xmoi" class="md-nav__link">
      -Xmoi
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    <a href="../xmo/" title="-Xmos" class="md-nav__link">
      -Xmos
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    <a href="../xmo/" title="-Xmox" class="md-nav__link">
      -Xmox
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      -Xmr
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    <a href="../xmr/" title="-Xmrx" class="md-nav__link">
      -Xmrx
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      -Xms
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      -Xmso
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      -Xmx
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    <a href="../xaot/" title="-Xnoaot" class="md-nav__link">
      -Xnoaot
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    <a href="../xclassgc/" title="-Xnoclassgc" class="md-nav__link">
      -Xnoclassgc
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  <li class="md-nav__item">
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      -Xnocompactexplicitgc
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      -Xnocompactgc
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      -Xnocompressedrefs
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      -Xnojit
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      -Xnolinenumbers
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      -Xnoloa
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      -Xnosigcatch
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      -Xnosigchain
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      -Xnuma:none
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      -Xoptionsfile
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      -Xscminaot
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      -Xscminjitdata
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      -Xshareclasses
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      -Xsigcatch
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<h1 id="-xsignal">-Xsignal</h1>
<p><strong>(z/OS&reg; only)</strong></p>
<p>This option controls the behavior of OpenJ9 VM signal handlers.</p>
<h2 id="syntax">Syntax</h2>
<pre><code>    -Xsignal:&lt;parameter&gt;=&lt;value&gt;
</code></pre>
<h2 id="parameters">Parameters</h2>
<p><i class="fa fa-exclamation-triangle" aria-hidden="true"></i> <strong>Restriction:</strong> You cannot use these parameters together.</p>
<h3 id="posixsignalhandler"><code>posixSignalHandler</code></h3>
<pre><code>    -Xsignal:posixSignalHandler=cooperativeShutdown
</code></pre>
<dl>
<dd>
<p>When the VM signal handlers for SIGSEGV, SIGILL, SIGBUS, SIGFPE, SIGTRAP, and SIGABRT end a process, they call <code>exit()</code>, by default. In this case, the z/OS&trade; Language Environment&reg; is not aware that the VM ended abnormally.</p>
<p>With <code>-Xsignal:posixSignalHandler=cooperativeShutdown</code>, the VM no longer uses <code>exit()</code> to end the process from the signal handlers. Instead, the VM behaves in one of the following ways:</p>
<ul>
<li>In response to a z/OS hardware exception, the VM uses <code>return()</code>.</li>
<li>In response to signals raised or injected by software, the VM ends the enclave with <code>abend 3565</code>.</li>
</ul>
<p>Language Environment detects that the VM is ending abnormally and initiates Resource Recovery Services.</p>
</dd>
</dl>
<h3 id="userconditionhandler"><code>userConditionHandler</code></h3>
<dl>
<dd><strong>(31-bit z/OS only)</strong><pre><code>-Xsignal:userConditionHandler=percolate
</code></pre>
</dd>
<dd>
<p>This option results in similar behavior to the <a href="../xceehdlr/"><code>-XCEEHDLR</code></a> option: the VM registers user condition handlers to handle the z/OS exceptions that would otherwise be handled by the VM POSIX signal handlers for the SIGBUS, SIGFPE, SIGILL, SIGSEGV, and SIGTRAP signals.</p>
<p>As with the <code>-XCEEHDLR</code> option, the VM does not install POSIX signal handlers for these signals.</p>
<p>This option differs from the <code>-XCEEHDLR</code> option in that the VM percolates <em>all</em> Language Environment&reg; conditions that were not triggered and expected by the VM during normal running, including conditions that are severity 2 or greater. The VM generates its own diagnostic information before percolating severity 2 or greater conditions.</p>
<p>The VM is in an undefined state after percolating a severity 2 or greater condition. Applications cannot resume running then call back into, or return to, the VM.</p>
</dd>
</dl>
<h2 id="see-also">See also</h2>
<ul>
<li><a href="../xceehdlr/"><code>-XCEEHDLR</code></a></li>
<li><a href="https://www.ibm.com/support/knowledgecenter/SSYKE2_8.0.0/com.ibm.java.vm.80.doc/docs/j9_signals_j9_handling.html">Signals used by the VM</a>.</li>
</ul>
<!-- ==== END OF TOPIC ==== xsignal.md ==== -->

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