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<p>Hello,</p>
<p><br>
</p>
<p>I had a look here, and can reproduce the error.</p>
<p><br>
</p>
<p>jnativescan does have handling for Multi-Release jars. By default
it uses the current JDK version, which in your case would be 24.
An exact version can be specified using --release. The issue in
this case is that the error originates from the class file <font face="monospace">reactor.core.publisher.CallSiteSupplierFactory$SharedSecretsCallSiteSupplierFactory$TracingException</font>,
which does not have a class file entry in the META-INF/versions
directory. There is one for the enclosing class <font face="monospace">reactor.core.publisher.CallSiteSupplierFactory</font>,
but not for this nested class. jnativescan doesn't try to
determine whether a class file is used, it just scans all the
class files in the jar file that belong to a particular runtime
version, so in this case, it doesn't see that the <font face="monospace">TracingException</font> class is not actually
being used.</p>
<p><br>
</p>
<p>I think your idea of emitting a warning instead of an error is
probably the right one. We won't be able to determine whether a
method being referenced is restricted or not, since you need the
class file to be able to look at the annotations, but if the class
can not be loaded on the particular runtime version, then even if
the method was restricted, it could never be called any way.</p>
<p><br>
</p>
<p>Thank you for submitting this useful piece of feedback! I've
filed: <a class="moz-txt-link-freetext" href="https://bugs.openjdk.org/browse/JDK-8353840">https://bugs.openjdk.org/browse/JDK-8353840</a><br>
</p>
<p><br>
</p>
<p>Jorn<br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 4-4-2025 18:58, Danish Nawab wrote:<br>
</div>
<blockquote type="cite" cite="mid:PH7PR12MB68845FBEEC1217AA3B436F45C3A92@PH7PR12MB6884.namprd12.prod.outlook.com">
<style type="text/css" style="display:none;">P {margin-top:0;margin-bottom:0;}</style>
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<code>jnativescan</code> terminates when ran on a JAR with a
missing class.</div>
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Example:<br>
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```</div>
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jnativescan --class-path reactor-core-3.7.4.jar</div>
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<br>
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ERROR: Error while processing method:
reactor.core.publisher.CallSiteSupplierFactory$SharedSecretsCallSiteSupplierFactory$TracingException::get()String</div>
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CAUSED BY: System class can not be found:
sun.misc.JavaLangAccess</div>
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``` </div>
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<br>
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(above jar downloaded from [1]) </div>
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<br>
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The offending class seems to refer to a now unavailable <code>sun.misc.JavaLangAccess</code> but
still handles this error scenario silently [2]</div>
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<br>
</div>
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Because <code>jnativescan</code> terminates early, I can't say
whether or not this library uses native/restricted features.
Perhaps it would be better if instead of terminating,
<code>jnativescan</code> continued the analysis after warning
about the missing class.</div>
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<br>
</div>
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Also, the above JAR seems to be a Multi-Release Jar, where the
Java 11+ version of the code does not even refer
sun.misc.JavaLangAccess [3].</div>
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Should <code>jnativescan</code> have special handling for
Multi-Release JARs by analysing the version that would be
applicable for the current JDK?</div>
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<br>
</div>
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Versions:</div>
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```</div>
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java --version</div>
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openjdk 24 2025-03-18</div>
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OpenJDK Runtime Environment (build 24+36-3646)</div>
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OpenJDK 64-Bit Server VM (build 24+36-3646, mixed mode, sharing)</div>
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<br>
</div>
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jnativescan --version</div>
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24</div>
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```</div>
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<br>
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Overall, <code>jnativescan</code> is extremely helpful in
finding the dependencies using native/restricted features. </div>
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<br>
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[1] <a href="https://repo1.maven.org/maven2/io/projectreactor/reactor-core/3.7.4/reactor-core-3.7.4.jar" target="_blank" id="OWAec8539e4-a795-1906-25ed-5e3fa4b4787b" class="x_OWAAutoLink x_elementToProof moz-txt-link-freetext" title="https://repo1.maven.org/maven2/io/projectreactor/reactor-core/3.7.4/reactor-core-3.7.4.jar" rel="noopener noreferrer" data-linkindex="0" data-auth="NotApplicable" style="margin: 0px; text-align: left;" moz-do-not-send="true">
https://repo1.maven.org/maven2/io/projectreactor/reactor-core/3.7.4/reactor-core-3.7.4.jar</a></div>
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[2] <a href="https://github.com/reactor/reactor-core/blob/7dee739/reactor-core/src/main/java/reactor/core/publisher/CallSiteSupplierFactory.java#L56-L64" target="_blank" id="OWA38d05e4a-6376-f197-cd90-9e781b3f6a08" class="x_OWAAutoLink moz-txt-link-freetext" title="https://github.com/reactor/reactor-core/blob/7dee739/reactor-core/src/main/java/reactor/core/publisher/CallSiteSupplierFactory.java#L56-L64" rel="noopener noreferrer" data-linkindex="1" data-auth="NotApplicable" style="margin: 0px;" moz-do-not-send="true">
https://github.com/reactor/reactor-core/blob/7dee739/reactor-core/src/main/java/reactor/core/publisher/CallSiteSupplierFactory.java#L56-L64</a></div>
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[3] <a href="https://github.com/reactor/reactor-core/blob/0b93178/reactor-core/src/main/java11/reactor/core/publisher/CallSiteSupplierFactory.java" target="_blank" id="OWA86a65431-511c-8e53-6eee-9e94dbd4cd7e" class="x_OWAAutoLink moz-txt-link-freetext" title="https://github.com/reactor/reactor-core/blob/0b93178/reactor-core/src/main/java11/reactor/core/publisher/CallSiteSupplierFactory.java" rel="noopener noreferrer" data-linkindex="2" data-auth="NotApplicable" style="margin: 0px;" moz-do-not-send="true">
https://github.com/reactor/reactor-core/blob/0b93178/reactor-core/src/main/java11/reactor/core/publisher/CallSiteSupplierFactory.java</a></div>
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<br>
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</blockquote>
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