Tobias Reinhard
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00bb9d4a17
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Verified runtime assertion that running task is either scheduled or yielding.
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2022-12-04 11:54:07 -05:00 |
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Tobias Reinhard
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fbf4ba981f
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Added lemmas to update read permissions for unscheduled tasks after new task has been started.
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2022-12-04 10:19:48 -05:00 |
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Tobias Reinhard
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6a0b2116fe
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Added lemmas to define updated state lists and reason locally about results. Local reasoning necessary to avoid auto-lemma application loops.
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2022-12-04 09:17:13 -05:00 |
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Tobias Reinhard
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e403e8bc74
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Added lemma to update the read permissions for unscheduled tasks after a task has been stopped.
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2022-12-03 18:05:15 -05:00 |
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Tobias Reinhard
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0df45b465e
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Added lemmas that allow updating the lock invariant after a state update.
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2022-12-03 14:54:26 -05:00 |
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Tobias Reinhard
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dda2dbda6f
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Added states list to lock invariant.
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2022-12-03 10:04:04 -05:00 |
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Tobias Reinhard
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e4db1f8aba
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Refined lock invariant to only give read permission to all tasks and write permission to locally scheduled task
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2022-12-03 08:58:19 -05:00 |
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Tobias Reinhard
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1919f8142f
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Deleted deprecated lemmas and predicates.
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2022-12-02 15:07:43 -05:00 |
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Tobias Reinhard
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3be9d76d82
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Made sharedSeg_TCB_p precise to allow merging of fractions without opening and closing
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2022-12-02 15:06:25 -05:00 |
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Tobias Reinhard
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b44eb855d9
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Deleted deprecated predicate and lemmas.
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2022-12-02 15:05:20 -05:00 |
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Tobias Reinhard
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df780a1823
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Introduced list of flat list of tasks in lock invariant. Simplifies access to sharedSeg_TCB_p chunks.
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2022-12-02 14:59:06 -05:00 |
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Tobias Reinhard
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eb1cfa53d3
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Exposed running state macros to VF.
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2022-12-02 11:54:12 -05:00 |
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Tobias Reinhard
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cd3fa4e577
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Added adaptation of Aalok's and Nathan's single-core proof for uxListRemove
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2022-12-01 11:47:52 -05:00 |
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Tobias Reinhard
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fe5612cf4f
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Extended lock invariants to justify safe access to ready tasks as well as scheduled task.
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2022-11-30 15:52:00 -05:00 |
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Tobias Reinhard
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78de786d89
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Expanded lock invariant to give us access to shared segments of all ready TCBs.
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2022-11-30 11:05:06 -05:00 |
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Tobias Reinhard
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e800ebd293
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Exposed node owners in all predicates related to nodes. Adapted proofs to new predicates.
Changed predicates:
- `xLIST_ITEM`
- `DLS`
- `xLIST`
- `readyLists_p`
- `List_array_p`
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2022-11-30 09:44:25 -05:00 |
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Tobias Reinhard
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70f1041778
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Added documentation.
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2022-11-29 15:55:27 -05:00 |
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Tobias Reinhard
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22dc5c1287
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Added proof idea and TODOs. Need to refactor single-core list predicates.
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2022-11-29 13:53:53 -05:00 |
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Tobias Reinhard
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e8b8234416
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Renamed predicates to comply with naming conventions
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2022-11-29 09:47:50 -05:00 |
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Tobias Reinhard
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014acb9a00
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Refactored lock predicates to improve readability.
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2022-11-29 09:37:23 -05:00 |
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Tobias Reinhard
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b310efa029
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Added ready list lemmas.
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2022-11-29 08:32:32 -05:00 |
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Tobias Reinhard
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2048fb85da
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Commented old opening and closing lemmas out and switched back from Z3 to VF standard SMT solver
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2022-11-28 12:20:30 -05:00 |
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Tobias Reinhard
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bb00bee690
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Finished proof of DLS_close_2.
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2022-11-28 09:16:08 -05:00 |
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Tobias Reinhard
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1393ae3c34
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Set up lemma DLS_close_2 in accordance to DLS_open_2. Proved cases relating to empty prefix.
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2022-11-28 08:44:58 -05:00 |
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Tobias Reinhard
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28fb658a59
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Proved last case in lemma DLS_open_2. Will need to revisit once the lemma's postcondition has been strengtened.
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2022-11-27 09:29:17 -05:00 |
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Tobias Reinhard
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53189c46d4
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Added new version of DLS opening lemma that reduces case splits in DLS proofs. Proved 3/4 of it.
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2022-11-26 12:15:34 -05:00 |
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Tobias Reinhard
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49af8fd30f
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Finished verification of iteration updates in prvSelectHighestPriorityTask.
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2022-11-23 15:18:11 -05:00 |
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Tobias Reinhard
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9d1b47c5e5
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Added lemmas to simplify opening and closing DLS for cases of the form pxTask->pxNext
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2022-11-23 13:53:10 -05:00 |
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Tobias Reinhard
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be9de4d570
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Added lemma DLS_nonEndItem_next_close to help closing DLS opened with DLS_nonEndItem_next_open.
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2022-11-23 11:28:27 -05:00 |
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Tobias Reinhard
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9e3ea9016e
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Added lemma DLS_end_next_close to help closing DLS opened with DLS_end_next_open
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2022-11-23 08:31:07 -05:00 |
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Tobias Reinhard
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5e2f51caa8
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Reformatted lemma proofs to improve readability.
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2022-11-22 13:26:26 -05:00 |
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Tobias Reinhard
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397cb12abb
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Added lemmas to reason about updates to pointers in the ready list of the form pxTaskItem = pxTaskItem->pxNext
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2022-11-22 13:08:22 -05:00 |
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Tobias Reinhard
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f7e537a19f
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Restructured proof.
New proof opens the DLS predicate to justify accesses to `pxTaskItem->next` and proves that `pxTaskItem->next` points to a valid list item.
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2022-11-22 10:10:41 -05:00 |
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Tobias Reinhard
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2fd6bcc2d7
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Updated predicate xLIST_ITEM to jeep up with breaking VF change.
VeriFast now ensures that no uninitialised values are read. `x |-> _` is interpreted as "uninitialised", `x |-> ?v` is interpreted as "initialised".
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2022-11-22 07:14:21 -05:00 |
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Tobias Reinhard
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3fee2ec01f
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Added more DLS lemmas.
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2022-11-21 08:16:28 -05:00 |
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Tobias Reinhard
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5cf8b4ed1c
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Added shared global variable xSchedulerRunning to task-isr lock invariant.
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2022-11-21 08:06:19 -05:00 |
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Tobias Reinhard
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81355bc42f
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Added DLS lemmas related tosplit.
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2022-11-21 08:05:32 -05:00 |
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Tobias Reinhard
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5b6a92f023
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Added TODO
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2022-11-18 16:47:47 -05:00 |
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Tobias Reinhard
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cf65065a0c
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Used single-core list predicate xLIST to express access permissions to ready lists in readyLists_p.
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2022-11-18 16:27:38 -05:00 |
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Tobias Reinhard
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b1fc658413
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Added single-core list predicates and proofs. Most proofs are commented out for the moment.
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2022-11-18 15:38:32 -05:00 |
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Tobias Reinhard
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f5c0a64f86
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Made isr lock predicate abstract.
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2022-11-18 14:31:37 -05:00 |
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Tobias Reinhard
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02e019fe45
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Highlighted that reused list proofs assume single-core setting.
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2022-11-18 13:46:43 -05:00 |
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Tobias Reinhard
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c9e61fce49
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Introduced initial formulation of predicate to capture shared ready lists.
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2022-11-18 09:22:31 -05:00 |
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Tobias Reinhard
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6dcaef48d6
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Added loop invariant to main search loop in prvSelectHighestPriorityTask.
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2022-11-17 14:24:44 -05:00 |
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Tobias Reinhard
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fb01980b63
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Verified new contract for xTaskGetCurrentTaskHandle.
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2022-11-17 12:08:38 -05:00 |
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Tobias Reinhard
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d3bda01f16
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Verified macro taskCHECK_FOR_STACK_OVERFLOW.
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2022-11-17 09:20:21 -05:00 |
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Tobias Reinhard
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c3c350f8dc
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vTaskSwitchContext now has access to the current task's stack.
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2022-11-16 15:31:49 -05:00 |
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Tobias Reinhard
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383a055872
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taskCHECK_FOR_STACK_OVERFLOW assumes minimal stack size. Updated stack predicate accordingly.
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2022-11-16 15:30:40 -05:00 |
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Tobias Reinhard
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4eb2fa573e
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Wrote contracts for lock release operations.
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2022-11-16 14:18:03 -05:00 |
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Tobias Reinhard
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54523ecdce
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Included global variables pxCurrentTCBs and pxYieldingPendings in interrupt invariant.
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2022-11-16 13:53:22 -05:00 |
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