<div dir="ltr"><div>Yes, of course. On Java 25 the post processing is using the Class File API and not ASM, but the method should be passed "as is" as it is not transformed. Yet, the code seems to break.</div><div><br></div><div>I will have a look why this is the case and if this is a result of my integration or the API in itself.</div><div><br></div><div>Thanks for the pointer. Best regards, Rafael</div><div><br></div><div><br></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">Am Fr., 21. März 2025 um 12:40 Uhr schrieb Jan Lahoda <<a href="mailto:jan.lahoda@oracle.com">jan.lahoda@oracle.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><u></u>
<div>
<p>Hello Rafael,</p>
<p><br>
</p>
<p>I peeked at this, and it seems to me that when javac writes the
file, the table switch offsets seem sensible:</p>
<p> 100: 322<br>
101: 374<br>
102: 374<br>
103: 374<br>
104: 374<br>
105: 374<br>
106: 374<br>
107: 374<br>
108: 374<br>
109: 296<br>
110: 374<br>
111: 374<br>
112: 361<br>
113: 374<br>
114: 335<br>
115: 348<br>
116: 309<br>
default: 374</p>
<p>(I tweaked javac to make a copy of the generated classfile right
after it is done with writing it to the disk.)<br>
</p>
<p>But when the build ends, the classfile does not look sensible
anymore. Is there some classfile postprocessing going on? Could
you please check if that's working correctly?</p>
<p><br>
</p>
<p>Thanks,</p>
<p> Jan</p>
<p><br>
</p>
<div>On 21. 03. 25 11:15, Rafael
Winterhalter wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">(And of course, this is the right list, I
originally thought to post this to the HotSpot list, but this
happens in interpreted mode, so I excluded that.)</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Am Fr., 21. März 2025 um
11:14 Uhr schrieb Rafael Winterhalter <<a href="mailto:rafael.wth@gmail.com" target="_blank">rafael.wth@gmail.com</a>>:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div>The error is stable and can be reproduced by simply
building the project. But it seems to be an issue with
javac indeed. The tableswitch statement is compiled as
follows.</div>
<div><br>
</div>
<div> 213: tableswitch { // 100 to 116<br>
100: 322<br>
101: 296<br>
102: 361<br>
103: 335<br>
104: 348<br>
105: 309<br>
106: 374<br>
107: 374<br>
108: 374<br>
109: 374<br>
110: 374<br>
111: 374<br>
112: 374<br>
113: 374<br>
114: 374<br>
115: 374<br>
116: 374<br>
default: 374</div>
<div><br>
</div>
<div>The right branch for 'p' is included at offset 361, but
'p' is an integer value of 109. The character 102 (f) is
not included in the Java source.</div>
<div><br>
</div>
<div>I guess this is the wrong mailing list in this case. I
will post this to the javac list.</div>
<div><br>
</div>
<div>Thanks, Rafael</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Am Fr., 21. März 2025 um
10:54 Uhr schrieb Remi Forax <<a href="mailto:forax@univ-mlv.fr" target="_blank">forax@univ-mlv.fr</a>>:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<div style="font-family:arial,helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<div>Hello Raphael,</div>
<div>It may be hard to reproduce,</div>
<div>can you do a javap -c on the class/method so it
will be easier to see if the generated bytecode is
wrong of if it's a VM issue.</div>
<div><br>
</div>
<div>regards,</div>
<div>Rémi</div>
<div><br>
</div>
<hr id="m_2358031405540712851m_6833689223670212611m_3686300147316054987m_649006921082298200zwchr">
<div>
<blockquote style="border-left:2px solid rgb(16,16,255);margin-left:5px;padding-left:5px;color:rgb(0,0,0);font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt"><b>From:
</b>"Rafael Winterhalter" <<a href="mailto:rafael.wth@gmail.com" target="_blank">rafael.wth@gmail.com</a>><br>
<b>To: </b>"compiler-dev" <<a href="mailto:compiler-dev@openjdk.org" target="_blank">compiler-dev@openjdk.org</a>><br>
<b>Sent: </b>Friday, March 21, 2025 10:20:48 AM<br>
<b>Subject: </b>Bug in JDK25 with switch
statements<br>
</blockquote>
</div>
<div>
<blockquote style="border-left:2px solid rgb(16,16,255);margin-left:5px;padding-left:5px;color:rgb(0,0,0);font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt">
<div dir="ltr">
<div>Hello,</div>
<div>my project Byte Buddy fails to build with
recent JDK 25s. I am not sure if this is a
known bug, but I wanted to mention it: <a href="https://github.com/raphw/byte-buddy/actions/runs/13975513319/job/39131008617" target="_blank">https://github.com/raphw/byte-buddy/actions/runs/13975513319/job/39131008617</a><br>
</div>
<br>
<div>The reason for the build failure is that
this switch statement ends up in the default
branch: <a href="https://github.com/raphw/byte-buddy/blob/master/byte-buddy-dep/src/main/java/net/bytebuddy/asm/Advice.java#L3239" target="_blank">https://github.com/raphw/byte-buddy/blob/master/byte-buddy-dep/src/main/java/net/bytebuddy/asm/Advice.java#L3239</a><br>
</div>
<br>
<div>This is happening for the char 'p' which is
the last legal branch of the switch. This does
not yield an error on JDKs 5 to 24, so this
must be introduced recently.</div>
<br>
<div>Thanks, Rafael</div>
</div>
<br>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</blockquote>
</div>
</blockquote>
</div>
</blockquote></div>