[BACKOUT] Mixed jstack cannot find function in vDSO

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      The builds fails with the following failure after JDK-8376269:

      [2026-02-06T13:13:10,148Z] /opt/mach5/mesos/work_dir/slaves/da1065b5-7b94-4f0d-85e9-a3a252b9a32e-S86858/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/f96151a9-2907-4455-b3c2-be6fb366196e/runs/97b66561-ff66-41b6-a019-81e8349d7657/workspace/open/src/jdk.hotspot.agent/linux/native/libsaproc/ps_core.c: In function 'handle_vdso':
      [2026-02-06T13:13:10,148Z] /opt/mach5/mesos/work_dir/slaves/da1065b5-7b94-4f0d-85e9-a3a252b9a32e-S86858/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/f96151a9-2907-4455-b3c2-be6fb366196e/runs/97b66561-ff66-41b6-a019-81e8349d7657/workspace/open/src/jdk.hotspot.agent/linux/native/libsaproc/ps_core.c:625:14: error: implicit declaration of function 'memfd_create' [-Wimplicit-function-declaration]
      [2026-02-06T13:13:10,148Z] 625 | lib_fd = memfd_create("[vdso] in core", 0);
      [2026-02-06T13:13:10,148Z] | ^~~~~~~~~~~~
      [2026-02-06T13:13:10,166Z] make[3]: *** [/opt/mach5/mesos/work_dir/slaves/da1065b5-7b94-4f0d-85e9-a3a252b9a32e-S86858/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/f96151a9-2907-4455-b3c2-be6fb366196e/runs/97b66561-ff66-41b6-a019-81e8349d7657/workspace/build/linux-aarch64-open/support/native/jdk.hotspot.agent/libsaproc/static/ps_core.o] Error 1
      [2026-02-06T13:13:10,166Z] modules/jdk.hotspot.agent/Lib.gmk:58: recipe for target '/opt/mach5/mesos/work_dir/slaves/da1065b5-7b94-4f0d-85e9-a3a252b9a32e-S86858/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/f96151a9-2907-4455-b3c2-be6fb366196e/runs/97b66561-ff66-41b6-a019-81e8349d7657/workspace/build/linux-aarch64-open/support/native/jdk.hotspot.agent/libsaproc/static/ps_core.o' failed
      [2026-02-06T13:13:10,167Z] make[2]: *** [jdk.hotspot.agent-static-libs] Error 2
      [2026-02-06T13:13:10,167Z] make[2]: *** Waiting for unfinished jobs....
      [2026-02-06T13:13:10,167Z] make/Main.gmk:200: recipe for target 'jdk.hotspot.agent-static-libs' failed
      [2026-02-06T13:17:25,936Z]
      [2026-02-06T13:17:25,937Z] ERROR: Build failed for target 'default (product-bundles test-bundles static-libs-bundles)' in configuration 'linux-aarch64-open' (exit code 2)
      [2026-02-06T13:17:26,003Z]
      [2026-02-06T13:17:26,003Z] === Output from failing command(s) repeated here ===
      [2026-02-06T13:17:26,003Z] * For target support_native_jdk.hotspot.agent_libsaproc_static_ps_core.o:
      [2026-02-06T13:17:26,003Z] /opt/mach5/mesos/work_dir/slaves/da1065b5-7b94-4f0d-85e9-a3a252b9a32e-S86858/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/f96151a9-2907-4455-b3c2-be6fb366196e/runs/97b66561-ff66-41b6-a019-81e8349d7657/workspace/open/src/jdk.hotspot.agent/linux/native/libsaproc/ps_core.c: In function 'handle_vdso':
      [2026-02-06T13:17:26,003Z] /opt/mach5/mesos/work_dir/slaves/da1065b5-7b94-4f0d-85e9-a3a252b9a32e-S86858/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/f96151a9-2907-4455-b3c2-be6fb366196e/runs/97b66561-ff66-41b6-a019-81e8349d7657/workspace/open/src/jdk.hotspot.agent/linux/native/libsaproc/ps_core.c:625:14: error: implicit declaration of function 'memfd_create' [-Wimplicit-function-declaration]
      [2026-02-06T13:17:26,003Z] 625 | lib_fd = memfd_create("[vdso] in core", 0);
      [2026-02-06T13:17:26,003Z] | ^~~~~~~~~~~~
      [2026-02-06T13:17:26,003Z]
      [2026-02-06T13:17:26,003Z] * All command lines available in /opt/mach5/mesos/work_dir/slaves/da1065b5-7b94-4f0d-85e9-a3a252b9a32e-S86858/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/f96151a9-2907-4455-b3c2-be6fb366196e/runs/97b66561-ff66-41b6-a019-81e8349d7657/workspace/build/linux-aarch64-open/make-support/failure-logs.
      [2026-02-06T13:17:26,003Z] === End of repeated output ===

            Assignee:
            Christian Hagedorn
            Reporter:
            Christian Hagedorn
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            Watchers:
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              Created:
              Updated:
              Resolved: