In Isabelle2020, when isabelle jedit is started without a session
context, e.g. `isabelle jedit -l ASpec`, theory imports with path
references cause the isabelle process to hang.
Since sessions now declare directories, Isabelle can find those files
without path reference and we therefore remove all such path references
from import statements. With this, `jedit` and `build` should work with
and without explicit session context as before.
Signed-off-by: Gerwin Klein <gerwin.klein@data61.csiro.au>
arm ainvs: cleanup
Abbreviate Hoare triples that do not care about the return value and
whose pre and post conditions are the same.
x64 ainvs: cleanup
ainvs: cleanup
x64 ainvs: cleanup
drefine: cleanup
Added set_object_wp_strong, which infers from a given hoare triple with
command set_object that the object of same type already exists in the
heap, and hoare_set_object_weaken_pre which does the same thing, but can
be applied on top of existing lemmas about set_object.
ainvs: improve proof of set_thread_state_runnable_valid_blocked
ainvs: change return value to a more general one
in_set_object has a return value that is empty '()', but the theorem
still holds true when replaced with a generic parameter 'rv' making it
easier to use this lemma.
ainvs: trivial - updated style of proof
ainvs: strengthen set_object_idle lemma
Add conditions imposed by valid_idle into precondition.
Thank you to Matt Brecknell for the help.
ainvs: abbreviated Hoare triples and proof fix
ainvs: restated set_object_wp_strong with auxiliary lemmas
ainvs: update for new definition of set_object
ainvs: update for new definition of set_object
Move in a few set_object and set_aobject theorems from x64 theory files
as these theorems were architecture generic.
ainvs: update for new definition of set_object
ainvs: update for new definition of set_object
Session-qualified imports will be required for Isabelle2018 and help clarify
the structure of sessions in the build tree.
This commit mainly adds a new set of sessions for lib/, including a Lib
session that includes most theories in lib/ and a few separate sessions for
parts that have dependencies beyond CParser or are separate AFP sessions.
The group "lib" collects all lib/ sessions.
As a consequence, other theories should use lib/ theories by session name,
not by path, which in turns means spec and proof sessions should also refer
to each other by session name, not path, to avoid duplicate theory errors in
theory merges later.
The previous implementation of IOPortCaps has problems with revocability
and determining parency etc. This commit adds IOPortControlCaps which
behave identically to IRQControlCaps -- invoking the IOPortControlCap
allows one to create IOPortCaps with the supplied range.
There now exist invariants to show that there is only one
IOPortControlCap and that all IOPortCaps in the system do not overlap.
Furthermore there is a global record of which IO ports have been
allocated to prevent reissuing the same ports.
Colloquially known as "invert-fastpath".
Update verification efforts on ARM for the following seL4 changes:
- scheduling decisions done in possibleSwitchTo are moved to the
scheduler
- possibleSwitchTo only checks whether the candidate is valid for a
fast switch, not its priority, accepting possible candidates
immmediately as a switch-to scheduler action
- the scheduler checks the candidate against the current thread and
against the bitmaps before making a decision
- attemptSwitchTo and switchIfRequiredTo are gone
- scheduler is now more complicated, and numerous proofs related to it
are rewritten from scratch
- fast path now checks ready queues via the scheduler bitmaps
- L2 scheduler bitmap order reversed for better cache locality
Many iterations between the kernel and verification teams were needed
to get this right.
* word_eqI is no longer rule_format.
* Updated Isabelle/ML Thm.join_proofs to Thm.consolidate.
* Updated suffix_refl to suffix_order.order.refl.
* Removed some lines of proofs, thanks to improved simplifier.
now that we have valid_vspace_objs to express validiy of
vspace objects, we do not need valid_arch_objs: we have
valid_objs to state the validity of non-vspace arch objects.
* the definition of liveness is extended for tcb/vcpu reference
* proved liveness related properties for dissociate_vcpu_tcb, prepare_thread_delete, etc.
The things that usually go wrong:
- wp fall through: add +, e.g.
apply (wp select_wp) -> apply (wp select_wp)+
- precondition: you can remove most hoare_pre, but wpc still needs it, and
sometimes the wp instance relies on being able to fit a rule to the
current non-schematic precondition. In that case, use "including no_pre"
to switch off the automatic hoare_pre application.
- very rarely there is a schematic postcondition that interferes with the
new trivial cleanup rules, because the rest of the script assumes some
specific state afterwards (shouldn't happen in a reasonable proof, but
not all proofs are reasonable..). In that case, (wp_once ...)+ should
emulate the old behaviour precisely.
* Rephrasing of all the lemmas that used to refer to tcb_context as
a direct value on tcb.
* Providing arch-specific lemmas about handle_arch_fault_reply and
make_arch_fault_msg to deal with handle_fault_reply and make_fault_msg
new arch-specific cases.
* Trivial but arch-specific proofs about reserved_irq
tags: [VER-623][SELFOUR-413]
Ryan Barry
Gerwin Klein
Corey Lewis
Victor Phan
Thibaut Perami
Joel Beeren
Thomas Sewell
Miki Tanaka
Rafal Kolanski
Matthew Brecknell
Alejandro Gomez-Londono
Joel Beeren
Gerwin Klein
Xin,Gao