en Copyright 2015 Java http://kernelsources.org:8080/source/history/linux/kernel/trace/rv/rv_monitors_test.c#55ee4b931a7ffedc886175d265dd6e6d08fd4151 Merge tag 'trace-rv-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracePull Real-time Verifier updates from Steven Rostedt: - Switch LTL and DOT parsers to Lark in code generation tool The rvgen code generation tool originally parsed DOT files and LTL specifications using custom string parsing and Ply, which is no longer maintained. The DOT parser was fragile and prone to failure on minor format variations. Both LTL and DOT parsers have been rewritten to use the Lark parsing library. - Simplify Hybrid Automata clock variables The clock variables in hybrid automata monitors now use a single representation of the elapsed time since the clock was reset, rather than converting between invariant and guard representations. This allows simpler code generation for the newly refactored parser. - Generate cleanup hook for per-obj monitor The code generation scripts now adds a cleanup function to per-obj monitors for the user to wire to the appropriate event (e.g. sched_process_exit for tasks). - Reduce read_lock scope during per-task cleanup Take the tasklist_lock only when necessary, that is when iterating over for_each_process_thread(). - Simplify task monitor slot management Only rely on the slot array for per-task slot management to avoid inconsistency with the unused counter. - Improve rvgen code robustness and templates Use pathlib in rvgen and improve kernel path discovery. Also improve consistency across templates when generating code (e.g. author placeholder and monitor struct name). - Update rtapp sleep monitor Simplify the sleep monitor by excluding kernel threads and updating the nanosleep check to focus only on CLOCK_REALTIME. Also switch to use the sched_exit tracepoint to run in the context of the offending (wakee) task. - Add wakeup monitor Add the new rtapp/wakeup monitor to detect when lower-priority tasks wake up higher-priority ones, complementing the existing sleep monitor by running in the waker context and capturing its stack trace. - Fix tools/rv exit status on failure Ensure the rv tool returns a failure exit code when a monitor fails to start because it was already running. - Add automated selftests for tools/rv and rvgen Introduced automated bash selftests to validate rv monitor listing and execution under different configurations. Added tests for the rvgen code generator, validating generated files against expected output (golden). Tests are reachable via make check. - Add KUnit test coverage for verification monitors Added comprehensive KUnit tests to validate the functionality of deterministic, hybrid, and LTL monitors by emulating event sequences and timing in a mock environment without affecting the running kernel while expecting mock reactions to fire. Ensure real RV monitors cannot run during KUnit tests to avoid state corruption. - Mock current in rv monitors Mock the call to current in rv monitors when the KUnit tests are built to allow them to run the test on dummy tasks. No overhead is expected when KUnit tests aren't running. - Introduce rvgen kunit subcommand Added a new 'kunit' subcommand to rvgen to automatically patch an already generated monitor with KUnit integration templates by parsing its event handlers and creating the required mock structures and initializations. - Refine kernel verification selftests Added new selftests for the deadline and stall monitors and rearranged the existing wwnr_printk test to resolve flakiness. Additionally, fixed an issue in the selftests framework where negative assertion failures were not correctly propagated due to shell rules. - Fix 32-bit build of nomiss KUnit test A previous commit introduced a division between an u64 and a constant value and that doesn't build on 32-bit systems. Use div_u64() instead. - Document changes in sleep monitor The sleep monitor introduced some changes in the past like allowing epoll_wait() as a valid sleep and a task going to runnable before scheduling as a valid wakeup. Document both.* tag 'trace-rv-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (40 commits) Documentation/rv: Explain epoll and aborted sleeps rv: Fix 32-bit build of nomiss KUnit test selftests/verification: Add selftests for deadline and stall monitors selftests/verification: Rearrange the wwnr_printk test selftests/verification: Fix wrong errexit assumption rv: Add KUnit tests for some LTL monitors rv: Add KUnit mock for current rv: Add KUnit tests for some DA/HA monitors rv: Export task monitor slot and react symbols verification/rvgen: Add selftests for rvgen kunit verification/rvgen: Add the rvgen kunit subcommand verification/rvgen: Add selftests verification/rvgen: Add golden and spec folders for tests tools/rv: Add selftests verification/rvgen: Improve consistency in template files verification/rvgen: Use pathlib instead of os.path verification/rvgen: Improve rv_dir discovery in RVGenerator tools/rv: Fix exit status when monitor execution fails rv: Use generic rv_this for the rv_monitor variable in LTL rv/rtapp: Add wakeup monitor ... List of files: /linux/kernel/trace/rv/rv_monitors_test.c Wed, 19 Aug 2026 22:29:22 +0200 Linus Torvalds <torvalds@linux-foundation.org> http://kernelsources.org:8080/source/history/linux/kernel/trace/rv/rv_monitors_test.c#51f3fe704a880c7061057d9b22ada8964bc4c9de rv: Add KUnit tests for some LTL monitorsValidate the functionality of LTL monitors by injecting events in acontrolled environment (KUnit) and expecting reactions, just like it isdone in DA monitors.Reviewed-by: Nam Cao <namcao@linutronix.de>Link: https://lore.kernel.org/r/20260723074534.43521-15-gmonaco@redhat.comSigned-off-by: Gabriele Monaco <gmonaco@redhat.com> List of files: /linux/kernel/trace/rv/rv_monitors_test.c Thu, 23 Jul 2026 09:45:31 +0200 Gabriele Monaco <gmonaco@redhat.com> http://kernelsources.org:8080/source/history/linux/kernel/trace/rv/rv_monitors_test.c#cf8f191c06546dff223df12010d4a21f7b631ae3 rv: Add KUnit mock for currentSome monitors do not only rely on tracepoint arguments but also on thecurrently executing task.This makes it more challenging to mock events in KUnit.Define wrapper functions around current, the functionality is mockedonly during KUnit, an additional function call is avoided using a staticbranch unless any (even unrelated) KUnit test is running.Rely on a global mock_current variable that is set only by the RV KUnittests and cleared on teardown. Unrelated KUnit tests that happen totrigger RV handlers would see it null and use current.Reviewed-by: Nam Cao <namcao@linutronix.de>Reviewed-by: Wen Yang <wen.yang@linux.dev>Link: https://lore.kernel.org/r/20260723074534.43521-14-gmonaco@redhat.comSigned-off-by: Gabriele Monaco <gmonaco@redhat.com> List of files: /linux/kernel/trace/rv/rv_monitors_test.c Thu, 23 Jul 2026 09:45:30 +0200 Gabriele Monaco <gmonaco@redhat.com> http://kernelsources.org:8080/source/history/linux/kernel/trace/rv/rv_monitors_test.c#8da2a88383658dac97769ed8f807ef6100a69480 rv: Add KUnit tests for some DA/HA monitorsValidate the functionality of DA monitors by injecting events in acontrolled environment (KUnit) and expecting reactions.Events handlers are exported directly from the monitor source fileswithout using system events and with dummy arguments (e.g. no realtasks). If the provided sequence of events incurs a violation, the testexpects the stub version of rv_react() to be called.This testing method can validate the entire monitor implementation sinceit sits between the monitor and the system (in place of thetracepoints). All sorts of system and timing events can be emulatedwithout affecting the running kernel.Handlers and monitor functions are exported as part of a struct tosimplify the process of running KUnit tests from kernel modules.Reviewed-by: Nam Cao <namcao@linutronix.de>Link: https://lore.kernel.org/r/20260723074534.43521-13-gmonaco@redhat.comSigned-off-by: Gabriele Monaco <gmonaco@redhat.com> List of files: /linux/kernel/trace/rv/rv_monitors_test.c Thu, 23 Jul 2026 09:45:29 +0200 Gabriele Monaco <gmonaco@redhat.com>