Give the standalone c-parser the facility to dump out its internal AST. Only
half finished, I got bored writing serialisers for the many syntax datatypes.
There has been some discussion about how to check whether an seL4 change
impacts verification. My thought was that the obvious thing to check is the
C-parser's AST. If this is unchanged, then further analyses must be unchanged.
The “statistics” output has been disabled for some time, and the
print_stats option has never been part of the publicly documented
interface, so hopefully this removal will go unnoticed.
Some of the terms measured by the stats code are available through
the recently-added trace_* options (but not all).
This is the “last” step of the Jira VER-517/VER-522 refactoring
(still does not support pausing between phases, but the relevant
infrastructure is there now).
Ought to pass AutoCorresTest suite now.
Brain fart: the corres proofs still have recursive assumptions,
even if the final function does not use them. This means that
attempting to split groups prior to definitions is doomed to fail.
The topology of recursive function groups can change due to dead code
elimination. This used to be handled (buggily, after define stages) by
the old code. This commit attempts to handle it properly (between convert
and define stages), using a new variant of the Seq data structure.
(Still not done for TS, though.)
Also (literally) fixes many free variables that used to be unhygienic.
Also makes the L2,HL,WA dataflow more uniform (but not yet refactored).
Heap lifting is annoying because we need to join all intermediate L2 results
before defining the lifted heap and proving heap lemmas.
This has been refactored into a new prepare_heap_lift stage that runs between
L2 conversion and HL proper.
With this we move away from a global mutable fn_info; instead we will
use a table of persistent (lazy) entries for each phase.
Function call metadata is also now either stored locally or recomputed
on-demand for each stage (with a few TODOs).
Matthew Brecknell
Alejandro Gomez-Londono
Miki Tanaka
Thomas Sewell
Japheth Lim
Gerwin Klein