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<p>Hello Leonid,</p>
<p>Thank you for doing this. I was checking with hotspot and
valhalla devs yesterday whether they would be interested in this
asmtools upgrade and there is indeed interest in this newer
version. I'll check with Christian this week and we'll do a few
runs of jtreg with the upgraded asmtools 9.1 version and see how
it goes, before integrating that upgrade. I'll keep you updated.<br>
</p>
<p>Thank you for your help so far.<br>
</p>
<p>-Jaikiran<br>
</p>
<div class="moz-cite-prefix">On 16/12/25 3:23 am, Leonid Kuskov
wrote:<br>
</div>
<blockquote type="cite" cite="mid:BN0PR10MB4886CEB5EB2E85193632DDD397ADA@BN0PR10MB4886.namprd10.prod.outlook.com">
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Hello Jaikiran, Chrisitan,</div>
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<br>
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Asmtools 9.1 has been switched to JDK 17 (LTS):
<a class="moz-txt-link-freetext" href="https://bugs.openjdk.org/browse/CODETOOLS-7904123">https://bugs.openjdk.org/browse/CODETOOLS-7904123</a><br>
Therefore, it is now possible to upgrade the jtreg asmtools
version from 8.1 to 9.1, which supports Valhalla and is used for
writing VM tests in JCK 26.</div>
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<br>
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Thanks,</div>
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Leonid </div>
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</div>
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<br>
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<div id="mail-editor-reference-message-container">
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<b><br>
<p style="font-family:Calibri;font-size:10pt;color:#000000;margin:5pt;font-style:normal;font-weight:normal;text-decoration:none;" align="Left">
Confidential- Oracle Internal<br>
</p>
From: </b>asmtools-dev
<a class="moz-txt-link-rfc2396E" href="mailto:asmtools-dev-retn@openjdk.org"><asmtools-dev-retn@openjdk.org></a> on behalf of Leonid
Kuskov <a class="moz-txt-link-rfc2396E" href="mailto:leonid.kuskov@oracle.com"><leonid.kuskov@oracle.com></a><br>
<b>Date: </b>Friday, December 12, 2025 at 11:53 AM<br>
<b>To: </b>Jaikiran Pai <a class="moz-txt-link-rfc2396E" href="mailto:jaikiran.pai@oracle.com"><jaikiran.pai@oracle.com></a>,
<a class="moz-txt-link-abbreviated" href="mailto:asmtools-dev@openjdk.org">asmtools-dev@openjdk.org</a> <a class="moz-txt-link-rfc2396E" href="mailto:asmtools-dev@openjdk.org"><asmtools-dev@openjdk.org></a><br>
<b>Subject: </b>Re: Does "-cv" option to jasm tool override
the class file version in jasm file?<br>
<br>
</div>
<div dir="ltr" class="ms-outlook-mobile-reference-message skipProofing" style="font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Currently, asmtools is built using JDK 21 (LTS). If you prefer
to continue using JDK 17, I can downgrade the build version to
align with jtreg. A few changes can be integrated over the
next few days.</div>
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Leonid</div>
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<b><br>
</b></div>
<p class="ms-outlook-mobile-reference-message skipProofing" style="margin: 5pt; font-family: Calibri; font-size: 10pt; color: rgb(0, 0, 0);">
Confidential- Oracle Internal</p>
<div class="ms-outlook-mobile-reference-message skipProofing" style="text-align: left; font-family: Aptos; font-size: 12pt; color: black;">
<b>From: </b>Jaikiran Pai <a class="moz-txt-link-rfc2396E" href="mailto:jaikiran.pai@oracle.com"><jaikiran.pai@oracle.com></a><br>
<b>Date: </b>Thursday, December 11, 2025 at 5:54 PM<br>
<b>To: </b>Leonid Kuskov
<a class="moz-txt-link-rfc2396E" href="mailto:leonid.kuskov@oracle.com"><leonid.kuskov@oracle.com></a>, <a class="moz-txt-link-abbreviated" href="mailto:asmtools-dev@openjdk.org">asmtools-dev@openjdk.org</a>
<a class="moz-txt-link-rfc2396E" href="mailto:asmtools-dev@openjdk.org"><asmtools-dev@openjdk.org></a><br>
<b>Subject: </b>Re: Does "-cv" option to jasm tool
override the class file version in jasm file?<br>
<br>
</div>
</div>
<div class="moz-cite-prefix">On 12/12/25 3:19 am, Leonid
Kuskov wrote:</div>
<blockquote>
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<span style="font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">In
typical usage, a
<code>.jasm</code> file explicitly specifies the
class-file version in its header, for example:</span></p>
<pre><div dir="ltr" class="overflow-y-auto p-4" style="text-align: left; text-indent: 0px; font-size: 12pt; color: rgb(0, 0, 0);"><code>test.jasm
public super class test version 55:0 {}
</code></div></pre>
<p class="ms-outlook-mobile-reference-message skipProofing" style="text-align: left; text-indent: 0px;">
<span style="font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">If
the version isn't specified in the file,
<code>jasm</code> defaults to 45.3.</span></p>
<p class="ms-outlook-mobile-reference-message skipProofing" style="text-align: left; text-indent: 0px;">
<span style="font-size: 16px;">When a version is present
in the </span><span style="font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><code style="font-family: Aptos, Arial, Helvetica, sans-serif;">.jasm</code></span><span style="font-size: 16px;"> file, the </span><span style="font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><code style="font-family: Aptos, Arial, Helvetica, sans-serif;">-cv</code></span><span style="font-size: 16px;"> option
</span>doesn’t override<span style="font-size: 16px;"> it.
For example, given a header such as:</span></p>
<pre><div dir="ltr" class="overflow-y-auto p-4" style="text-align: left; text-indent: 0px; font-size: 12pt; color: rgb(0, 0, 0);"><code>public super class test version 55:0 {}
</code></div></pre>
<p class="ms-outlook-mobile-reference-message skipProofing" style="text-align: left; text-indent: 0px;">
<span style="font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">and
the command:</span></p>
<pre><div dir="ltr" class="overflow-y-auto p-4" style="text-align: left; text-indent: 0px; font-size: 12pt; color: rgb(0, 0, 0);"><code>jasm -cv 66.0 -w . test.jasm
</code></div></pre>
<p class="ms-outlook-mobile-reference-message skipProofing" style="text-align: left; text-indent: 0px;">
<span style="font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">the
generated class file will still use version 55.0,
because the version defined in the source takes
precedence.</span></p>
</blockquote>
<p class="ms-outlook-mobile-reference-message skipProofing">Thank
you Leonid, this is what I had hoped -cv would be, but got
confused by the comment in that Main.java code. Thank you
for confirming.</p>
<blockquote>
<div dir="ltr" class="ms-outlook-mobile-reference-message skipProofing" style="font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Leonid</div>
<div dir="ltr" class="ms-outlook-mobile-reference-message skipProofing" style="font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
BTW: The latest asmtools release is 9.1, which is
preferable to version 8.1 for new or updated workflows.</div>
</blockquote>
<p class="ms-outlook-mobile-reference-message skipProofing">I
will take this up with the jtreg dev team and see if we
should upgrade to it. One thing that's important for jtreg
is the ability to use this library on older Java versions.
asmtools 8.1 requires Java 17 runtime and when we upgraded
jtreg to use 8.1 of asmtools, we had to enforce Java 17 as
the minimum to build and launch the jtreg tool.</p>
<p class="ms-outlook-mobile-reference-message skipProofing">-Jaikiran</p>
</div>
</div>
</blockquote>
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