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|
(in-package "DJVM")
(include-book "base")
(include-book "base-consistent-state")
(include-book "base-extra")
;-----------------------------------------------------------------
;
; ACONST_NULL
;
;
;-- Define guard first -------------------------------------------
(acl2::set-verify-guards-eagerness 2)
(defun wff-ACONST_NULL (inst)
(wff-inst inst))
(defun ACONST_NULL-guard (inst s)
(and (consistent-state-strong s)
(wff-inst inst)
(not (mem '*abstract* (method-accessflags (current-method s))))
(not (mem '*native* (method-accessflags (current-method s))))
(<= (+ (len (operand-stack (current-frame s))) 1)
(max-stack s))))
;-- Definition of ACONST_NULL -------------------------------------
(defun execute-ACONST_NULL (inst s)
(declare (xargs :guard (ACONST_NULL-guard inst s)))
(ADVANCE-PC (safe-pushStack '(REF . -1) s)))
;-- Runtime checking of the ACONST_NULL ----------------------
; Note the difference between *-guard and check-*
;
; Tue Apr 19 10:10:29 2005
(defun check-ACONST_NULL (inst s)
(declare (xargs :guard (consistent-state s)))
(and (wff-inst inst)
(not (mem '*abstract* (method-accessflags (current-method s))))
(not (mem '*native* (method-accessflags (current-method s))))
;; we could add the check for max stack!!
(<= (+ (len (operand-stack (current-frame s))) 1)
(max-stack s))))
;----------------------------------------------------------------------
;----------------------------------------------------------------------
;;; Strive to make sure that the proof of these theorems depend only on lemma
;;; in base-* !!
;;;
;-- ACONST_NULL-guard implies state consistency perserved -----------------
;; (i-am-here) ;; Sun Aug 7 22:21:15 2005
(defthm ACONST_NULL-guard-implies-execute-ACONST_NULL-perserve-consistency
(implies (ACONST_NULL-guard inst s)
(consistent-state-strong (execute-ACONST_NULL inst s))))
;-- check-ACONST_NULL implies ACONST_NULL-guard in a consistent state ----------
(defthm check-ACONST_NULL-implies-guard-succeeds
(implies (and (consistent-state-strong s)
(check-ACONST_NULL inst s))
(ACONST_NULL-guard inst s)))
;-- BCV::check-ACONST_NULL implies DJVM::check-ACONST_NULL on a corresponding state -----
(encapsulate ()
(local (include-book "base-bcv"))
(defthm bcv-check-ACONST_NULL-ensures-djvm-check-ACONST_NULL
(implies (and (bcv::check-ACONST_NULL inst (env-sig s)
(frame-sig (current-frame s)
(instance-class-table s)
(heap s)
(heap-init-map (aux s))))
(wff-inst inst)
(not (mem '*native* (method-accessflags (current-method s))))
(consistent-state s))
(djvm::check-ACONST_NULL inst s))))
;-- BCV::check-ACONST_NULL monotonic -------------------------------------
(encapsulate ()
(local (include-book "base-bcv-check-monotonic"))
(defthm sig-check-ACONST_NULL-on-more-general-implies-more-specific
(implies (and (bcv::sig-frame-more-general gframe sframe env)
(bcv::check-ACONST_NULL inst env gframe))
(bcv::check-ACONST_NULL inst env sframe))))
; avoided loading base-bcv-check-monotonic.lisp
;-- BCV::execute-ACONST_NULL monotonic ------------------------------------
(encapsulate ()
(local (include-book "base-bcv-step-monotonic"))
(defthm ACONST_NULL-monotonicity
(implies (and (bcv::sig-frame-more-general gframe sframe env)
(bcv::check-ACONST_NULL inst env gframe))
(bcv::sig-frame-more-general
(bcv::normal-frame (bcv::execute-ACONST_NULL inst env gframe))
(bcv::normal-frame (bcv::execute-ACONST_NULL inst env sframe)) env))))
;-- DJVM::step frame expansion ---------------------------
(encapsulate ()
(local (include-book "base-frame-sig-expansion"))
(defthm execute-ACONST_NULL-frame-sig-is
(mylet* ((ns (execute-ACONST_NULL inst s))
(index (topStack s))
(array-ref (topStack (popStack s))))
(implies
(and (consistent-state s)
(check-ACONST_NULL inst s))
(equal (frame-sig (current-frame ns)
(instance-class-table ns)
(heap ns)
(heap-init-map (aux ns)))
(frame-push-value-sig 'NULL
(frame-sig (current-frame s)
(instance-class-table s)
(heap s)
(heap-init-map (aux s)))))))))
;----------------------------------------------------------------------
;-- BCV::step frame expansion ---------------------------
(encapsulate ()
(local (include-book "base-bcv-frame-sig-expansion"))
(defthm bcv-execute-ACONST_NULL-is
(implies (and
(consistent-state s)
(check-ACONST_NULL inst s)
(bcv::check-ACONST_NULL inst (env-sig s)
(frame-sig (current-frame s)
(instance-class-table s)
(heap s)
(heap-init-map (aux s)))))
(equal (car (bcv::execute-ACONST_NULL inst (env-sig s)
(frame-sig (current-frame s)
(instance-class-table s)
(heap s)
(heap-init-map (aux s)))))
(frame-push-value-sig 'NULL
(frame-sig (current-frame s)
(instance-class-table s)
(heap s)
(heap-init-map (aux s))))))))
;----------------------------------------------------------------------
;;(i-am-here) ;; Mon Jul 25 16:50:01 2005. some proof break this!!
(encapsulate ()
(local (include-book "base-next-state-more-specific"))
(defthm next-state-no-more-general-ACONST_NULL
(mylet* ((oframe (frame-sig (current-frame s)
(instance-class-table s)
(heap s)
(heap-init-map (aux s))))
(ns (djvm::execute-ACONST_NULL inst s))
(nframe (frame-sig (current-frame ns)
(instance-class-table ns)
(heap ns)
(heap-init-map (aux ns)))))
(implies (and (consistent-state s)
(bcv::check-ACONST_NULL inst (env-sig s) oframe)
(djvm::check-ACONST_NULL inst s)
(not (check-null (topStack (popStack s)))))
(bcv::sig-frame-more-general
(mv-nth 0 (bcv::execute-ACONST_NULL inst
(env-sig s)
oframe))
nframe
(env-sig s))))))
;-- M6-DJVM-equal-when-check-succeeds.lisp ------------------------------
;; Tue Aug 2 16:10:50 2005
;; (i-am-here) ;; Tue Aug 2 16:10:56 2005
(include-book "../../M6/m6-bytecode")
(include-book "../../DJVM/consistent-state-to-untag-state")
;; (encapsulate ()
;; (local (include-book "base-untag-state"))
;; (defthm equal-ACONST_NULL-when-guard-succeeds
;; (implies (ACONST_NULL-guard inst s)
;; (equal (untag-state (djvm::execute-ACONST_NULL inst s))
;; (m6::execute-ACONST_NULL inst (untag-state s))))))
(encapsulate ()
(local (include-book "base-state-equiv"))
(defthm equal-ACONST_NULL-when-guard-succeeds
(implies (and (state-equiv M6::m6-s DJVM::djvm-s)
(ACONST_NULL-guard inst DJVM::djvm-s))
(state-equiv (m6::execute-ACONST_NULL inst M6::m6-s)
(djvm::execute-ACONST_NULL inst DJVM::djvm-s)))
:hints (("Goal" :do-not '(generalize fertilize)))))
;;; Tue Aug 2 16:12:55 2005
;;; take only two minutes. compare with the time it takes to replay ALOAD.lisp
;;; proof!
;----------------------------------------------------------------------
(encapsulate ()
(local (include-book "base-method-ptr-no-change"))
(defthm execute-ACONST_NULL-change-no-method-ptr
(equal (method-ptr (current-frame (djvm::execute-ACONST_NULL inst s)))
(method-ptr (current-frame s)))))
;;; next need to prove loaded class method-does-not-change!
(encapsulate ()
(local (include-book "base-method-no-change"))
(defthm deref-method-no-change-if-already-loaded-ACONST_NULL
(implies (consistent-state s)
(equal (deref-method (method-ptr (current-frame s))
(instance-class-table
(djvm::execute-ACONST_NULL inst s)))
(deref-method (method-ptr (current-frame s))
(instance-class-table s))))))
(in-theory (disable check-ACONST_NULL ACONST_NULL-guard execute-ACONST_NULL wff-ACONST_NULL))
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