The previous lemma name collided with List.sorted_filter, which
became shadowed; thus we broke AInvs.
Thanks to Victor Phan for bringing this breakage to my attention.
This alternative formulation determines the set of used_irqs in
a way that is less roundabout and closer to the C implementation:
instead of "every irq such that some object has an irqhandler cap
for it", it's "every irq such that there is an irq node for it".
For the proofs, we prove that the two formulations agree on well-formed
specs. Beyond using this fact, the old proofs need not change at all.
Incorporates some proof improvements suggested by @jalim and
shamelessly stolen.
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 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.
IRQ Nodes are now their own object type in capDL. This makes it much easier
to distinguish between "real" CNodes and IRQ Nodes.
Updated:
* the capDL refinement,
* the access proofs, and
* the system initialiser.
* The definitions of the separation "arrows" is slightly nicer and more consistent.
- We have a nicer correspondence between sep_map_c and sep_map_s.
- sep_map_irq now specifies exactly what the IRQ table contains
(that it *only* has one entry, not that it contains at least that entry).
- Nicer LaTeX output for the arrows.
* A number of minor renaming of constants and types.
- cdl_component => cdl_component_id
- sep_entity => cdl_component
- state_sep_projection => sep_state_projection
- obj_to_sep_state => object_to_sep_state
* Removed a few unused lemmas.
Gerwin Klein
Gerwin Klein
IlmariReissumies
Thomas Sewell
Gerwin Klein
Matthew Brecknell
Xin,Gao
David Greenaway
Andrew Boyton