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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f44473b47c
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Applied closing lemmas.
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2022-11-23 11:34:47 -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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538f29caeb
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Closed some predicates to simplify proof state.
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2022-11-22 10:17:37 -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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49643b6f5e
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Partial proof justifying that updates of pxTaskItem in inner search loop in prvSelectHighestPriorityTask are safe.
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2022-11-22 07:18:45 -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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35aef80072
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Proved that pxTaskItem points to valid list item before inner search loop.
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2022-11-21 14:02:23 -05:00 |
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Tobias Reinhard
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de3657239f
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Added minimal loop invariant to inner search loop in prvSelectHighestPriorityTask.
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2022-11-21 11:32:25 -05:00 |
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Tobias Reinhard
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92a925bb59
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Verified selection of initial task item in search loop in prvSelectHighestPriorityTask.
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2022-11-21 09:45:22 -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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8f463be9d8
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VF rewrite: Changed type of List_t.xListEnd to match expectations of single-core list proofs.
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2022-11-18 15:39:41 -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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1888670656
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Removed unneeded precondition
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2022-11-18 13:35:06 -05:00 |
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Tobias Reinhard
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e629319b9f
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Relaxed contract of xTaskGetCurrentTaskHandle.
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2022-11-18 09:32:24 -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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9b2871bc92
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Formulated first version of contract for prvSelectHighestPriorityTask and adapted proof of vTaskSwitchContext accordingly.
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2022-11-17 12:55:01 -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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63a8d73ecc
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Apdated proof for vTaskSwitchContext to rely on the proof of taskCHECK_FOR_STACK_OVERFLOW
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2022-11-17 10:23:39 -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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2f0b8bc82f
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Added proof steps outlining the verification of stack inspection. Also added TODOs concerning rewrites necessary for the verification of the macro.
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2022-11-16 16:08:15 -05:00 |
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Tobias Reinhard
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a7d1ca343a
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VF rewrite: Fixed an evaluation order in taskCHECK_FOR_STACK_OVERFLOW.
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2022-11-16 15:50:09 -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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7675b3bbe4
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Rewrote macro taskCHECK_FOR_STACK_OVERFLOW such that VF can handle it.
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2022-11-16 15:28:33 -05:00 |
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Tobias Reinhard
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b330847935
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Added preliminary post condition for vTaskSwitchContext
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2022-11-16 14:26:37 -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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Tobias Reinhard
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d63a8f83cd
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Renamed predicate encapsulating access permissions to core local variables to coreLocalInterruptInv_p.
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2022-11-16 11:31:12 -05:00 |
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Tobias Reinhard
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327423ef67
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TCB of currently scheduled task on core C is interrupt protected on core C. Updated invariants to reflect that.
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2022-11-16 11:25:37 -05:00 |
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Tobias Reinhard
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dbf03a0ab2
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Introduced predicates to differentiate between public and private parts of a TCB.
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2022-11-16 10:55:25 -05:00 |
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Tobias Reinhard
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360afe4374
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Cleaned up lock predicate header.
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2022-11-16 10:37:12 -05:00 |
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Tobias Reinhard
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d95976ebe5
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Added info about available tasks to lock predicate.
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2022-11-16 10:28:31 -05:00 |
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Tobias Reinhard
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7a5119e324
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Nightly build of Nov 14, 2022 broke old proof for vTaskCreate. Ignoring these proofs for now.
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2022-11-15 09:31:56 -05:00 |
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Tobias Reinhard
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d2f10a6b25
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vTaskSwitchContexxt assumes that that interrupts have been deactivated.
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2022-11-15 08:28:21 -05:00 |
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Tobias Reinhard
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a7fdaca373
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Reverted manual rewrites involving const pointers. Automatic rewrites are in place.
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2022-11-13 14:52:14 -05:00 |
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