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<a href="https://gitlab.rtems.org/mithileshm">MITHILESH MATTAPALLI</a> created a merge request: <a href="https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1097">!1097</a>
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Project:Branches: mithileshm/rtems:fix-can-stack-memory to rtems/rtos/rtems:main
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Author: MITHILESH MATTAPALLI
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Reviewers:
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<h2 id="user-content-summary" dir="auto" style="margin-top: 0; margin-bottom: 10px;" align="initial">Summary<a href="#summary" aria-label="Link to heading 'Summary'" data-heading-content="Summary" class="anchor" style="margin-top: 0;"></a>
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<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">cpukit/confdefs: Add CAN stack resource calculation</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">The CAN/CAN FD stack requires a worker task per configured queue. Empirical profiling confirms the CAN worker task utilizes <span data-escaped-char style="margin-top: 0;">~</span>404 bytes of stack space on 32-bit architectures.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">This patch introduces CONFIGURE_MAXIMUM_CAN_QUEUES to dynamically inject the required CAN worker tasks into the master _CONFIGURE_TASKS pool. Because the 404-byte usage falls below RTEMS_MINIMUM_STACK_SIZE, provisioning them as standard system tasks automatically guarantees sufficient stack space overhead.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Closes <a href="https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5193" title="CAN/CAN FD stack needs confdefs resource calculation support added" class="gfm gfm-issue" data-original="#5193" data-link="false" data-link-reference="false" data-issue="28858" data-project="26" data-iid="5193" data-namespace-path="rtems/rtos/rtems" data-project-path="rtems/rtos/rtems" data-issue-type="issue" data-container="body" data-placement="top" data-reference-type="issue" style="margin-top: 0;">#5193</a></p>
<h2 id="user-content-generative-ai" dir="auto" style="margin-top: 20px; margin-bottom: 10px;" align="initial">Generative AI<a href="#generative-ai" aria-label="Link to heading 'Generative AI'" data-heading-content="Generative AI" class="anchor" style="margin-top: 0;"></a>
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<strong style="font-weight: 600; margin-top: 0;">Prompt used:</strong> Various diagnostic queries regarding QEMU memory starvation errors and RTEMS <code style="font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 0.125rem 0.25rem;">confdefs</code> macro behavior.</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">
<strong style="font-weight: 600; margin-top: 0;">Which AI model was used:</strong> Gemini 3.1 pro</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">
<strong style="font-weight: 600; margin-top: 0;">How AI was used for the contribution:</strong> Diagnostic assistance and conceptual understanding. I used the AI as a search/learning tool to help analyze QEMU terminal output during testing and to clarify the architectural flow of RTEMS task provisioning within the <code style="font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 0.125rem 0.25rem;">confdefs</code> system. The actual macro logic, code implementation, and validation were written and executed entirely on my own.</li>
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<strong style="font-weight: 600; margin-top: 0;">Copyright Statement:</strong> I have not used a product that claims copyright over its output, and I have legitimate access to this tool.</li>
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