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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Oops, I missed the other thread about keeping the original order of handlers, so I’m taking the idea of synchronous streaming of ExceptionCatch back.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Adam<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">classfile-api-dev <classfile-api-dev-retn@openjdk.org> on behalf of Adam Sotona <adam.sotona@oracle.com><br>
<b>Date: </b>Thursday, 25 August 2022 8:18<br>
<b>To: </b>Paul Sandoz <paul.sandoz@oracle.com><br>
<b>Cc: </b>classfile-api-dev@openjdk.org <classfile-api-dev@openjdk.org><br>
<b>Subject: </b>Re: Classfile API Synchronous Stack Tracking in CodeBuilder<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Yes, it should be documented.<o:p></o:p></span></p>
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<p class="MsoNormal"><s><span style="font-size:11.0pt">Or maybe we can consider removal of handler label from ExceptionCatch and stream and collect it synchronously at the handler start position. Practically it defines handler block start, where try start and
try end labels are just additional information.<o:p></o:p></span></s></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">StackTracker is actually not verifying content nor merging stack at branch targets, however it indicates lost track by returning empty Optional. Handler block start usually follows "no-flow" instruction
(goto, return, athrow...) - and it represents a (temporary) dead code (as the handler has not been yet declared), so the stack tracking is lost and stack method indicates failure by returning empty Optional.<br>
<br>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Roboto">Thanks,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Roboto">Adam<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;color:black">From:</span></b><span style="font-size:11.0pt;color:black"> Paul Sandoz <paul.sandoz@oracle.com></span><span style="font-size:11.0pt;font-family:Roboto"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:11.0pt">Requiring ExceptionCatch (and ExceptionCatchAll, not suppported) be reported before the target label is bound is awkward, but it's clear why. I think that would require documentation,
and perhaps it should fail since it will otherwise report incorrect stack data?<br>
<br>
<br>
<o:p></o:p></span></p>
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