(* Title: HOL/MicroJava/Comp/CorrComp.thy
Author: Martin Strecker
*)
(* Compiler correctness statement and proof *)
theory CorrComp
imports "../J/JTypeSafe" LemmasComp
begin
declare wf_prog_ws_prog [simp add]
(* If no exception is present after evaluation/execution,
none can have been present before *)
lemma eval_evals_exec_xcpt:
"(G \ xs -ex\val-> xs' \ gx xs' = None \ gx xs = None) \
(G \<turnstile> xs -exs[\<succ>]vals-> xs' \<longrightarrow> gx xs' = None \<longrightarrow> gx xs = None) \<and>
(G \<turnstile> xs -st-> xs' \<longrightarrow> gx xs' = None \<longrightarrow> gx xs = None)"
by (induct rule: eval_evals_exec.induct) auto
(* instance of eval_evals_exec_xcpt for eval *)
lemma eval_xcpt: "G \ xs -ex\val-> xs' \ gx xs' = None \ gx xs = None"
(is "?H1 \ ?H2 \ ?T")
proof-
assume h1: ?H1
assume h2: ?H2
from h1 h2 eval_evals_exec_xcpt show "?T" by simp
qed
(* instance of eval_evals_exec_xcpt for evals *)
lemma evals_xcpt: "G \ xs -exs[\]vals-> xs' \ gx xs' = None \ gx xs = None"
(is "?H1 \ ?H2 \ ?T")
proof-
assume h1: ?H1
assume h2: ?H2
from h1 h2 eval_evals_exec_xcpt show "?T" by simp
qed
(* instance of eval_evals_exec_xcpt for exec *)
lemma exec_xcpt: "G \ xs -st-> xs' \ gx xs' = None \ gx xs = None"
(is "?H1 \ ?H2 \ ?T")
proof-
assume h1: ?H1
assume h2: ?H2
from h1 h2 eval_evals_exec_xcpt show "?T" by simp
qed
(**********************************************************************)
theorem exec_all_trans: "\(exec_all G s0 s1); (exec_all G s1 s2)\ \ (exec_all G s0 s2)"
by (auto simp: exec_all_def elim: Transitive_Closure.rtrancl_trans)
theorem exec_all_refl: "exec_all G s s"
by (simp only: exec_all_def)
theorem exec_instr_in_exec_all:
"\ exec_instr i G hp stk lvars C S pc frs = (None, hp', frs');
gis (gmb G C S) ! pc = i\<rbrakk> \<Longrightarrow>
G \<turnstile> (None, hp, (stk, lvars, C, S, pc) # frs) \<midarrow>jvm\<rightarrow> (None, hp', frs')"
apply (simp only: exec_all_def)
apply (rule rtrancl_refl [THEN rtrancl_into_rtrancl])
apply (simp add: gis_def gmb_def)
apply (case_tac frs', simp+)
done
theorem exec_all_one_step: "
\<lbrakk> gis (gmb G C S) = pre @ (i # post); pc0 = length pre;
(exec_instr i G hp0 stk0 lvars0 C S pc0 frs) =
(None, hp1, (stk1,lvars1,C,S, Suc pc0)#frs) \<rbrakk>
\<Longrightarrow>
G \<turnstile> (None, hp0, (stk0,lvars0,C,S, pc0)#frs) \<midarrow>jvm\<rightarrow>
(None, hp1, (stk1,lvars1,C,S, Suc pc0)#frs)"
apply (unfold exec_all_def)
apply (rule r_into_rtrancl)
apply (simp add: gis_def gmb_def split_beta)
done
(***********************************************************************)
definition progression :: "jvm_prog \ cname \ sig \
aheap \<Rightarrow> opstack \<Rightarrow> locvars \<Rightarrow>
bytecode \<Rightarrow>
aheap \<Rightarrow> opstack \<Rightarrow> locvars \<Rightarrow>
bool"
("{_,_,_} \ {_, _, _} >- _ \ {_, _, _}" [61,61,61,61,61,61,90,61,61,61]60) where
"{G,C,S} \ {hp0, os0, lvars0} >- instrs \ {hp1, os1, lvars1} ==
\<forall>pre post frs.
(gis (gmb G C S) = pre @ instrs @ post) \<longrightarrow>
G \<turnstile> (None,hp0,(os0,lvars0,C,S,length pre)#frs) \<midarrow>jvm\<rightarrow>
(None,hp1,(os1,lvars1,C,S,(length pre) + (length instrs))#frs)"
lemma progression_call:
"\ \pc frs.
exec_instr instr G hp0 os0 lvars0 C S pc frs =
(None, hp', (os', lvars', C', S', 0) # (fr pc) # frs) \
gis (gmb G C' S') = instrs' @ [Return] \
{G, C', S'} \<turnstile> {hp', os', lvars'} >- instrs' \<rightarrow> {hp'', os'', lvars''} \<and>
exec_instr Return G hp'' os'' lvars'' C' S' (length instrs')
((fr pc) # frs) =
(None, hp2, (os2, lvars2, C, S, Suc pc) # frs) \<rbrakk> \<Longrightarrow>
{G, C, S} \<turnstile> {hp0, os0, lvars0} >-[instr]\<rightarrow> {hp2,os2,lvars2}"
apply (simp only: progression_def)
apply (intro strip)
apply (drule_tac x="length pre" in spec)
apply (drule_tac x="frs" in spec)
apply clarify
apply (rule exec_all_trans)
apply (rule exec_instr_in_exec_all)
apply simp
apply simp
apply (rule exec_all_trans)
apply (simp only: append_Nil)
apply (drule_tac x="[]" in spec)
apply (simp only: list.simps list.size)
apply blast
apply (rule exec_instr_in_exec_all)
apply auto
done
lemma progression_transitive:
"\ instrs_comb = instrs0 @ instrs1;
{G, C, S} \<turnstile> {hp0, os0, lvars0} >- instrs0 \<rightarrow> {hp1, os1, lvars1};
{G, C, S} \<turnstile> {hp1, os1, lvars1} >- instrs1 \<rightarrow> {hp2, os2, lvars2} \<rbrakk>
\<Longrightarrow>
{G, C, S} \<turnstile> {hp0, os0, lvars0} >- instrs_comb \<rightarrow> {hp2, os2, lvars2}"
apply (simp only: progression_def)
apply (intro strip)
apply (rule_tac ?s1.0 = "Norm (hp1, (os1, lvars1, C, S,
length pre + length instrs0) # frs)"
in exec_all_trans)
apply (simp only: append_assoc)
apply (erule thin_rl, erule thin_rl)
apply (drule_tac x="pre @ instrs0" in spec)
apply (simp add: add.assoc)
done
lemma progression_refl:
"{G, C, S} \ {hp0, os0, lvars0} >- [] \ {hp0, os0, lvars0}"
apply (simp add: progression_def)
apply (intro strip)
apply (rule exec_all_refl)
done
lemma progression_one_step: "
\<forall>pc frs.
(exec_instr i G hp0 os0 lvars0 C S pc frs) =
(None, hp1, (os1,lvars1,C,S, Suc pc)#frs)
\<Longrightarrow> {G, C, S} \<turnstile> {hp0, os0, lvars0} >- [i] \<rightarrow> {hp1, os1, lvars1}"
apply (unfold progression_def)
apply (intro strip)
apply simp
apply (rule exec_all_one_step)
apply auto
done
(*****)
definition jump_fwd :: "jvm_prog \ cname \ sig \
aheap \<Rightarrow> locvars \<Rightarrow> opstack \<Rightarrow> opstack \<Rightarrow>
instr \<Rightarrow> bytecode \<Rightarrow> bool" where
"jump_fwd G C S hp lvars os0 os1 instr instrs ==
\<forall>pre post frs.
(gis (gmb G C S) = pre @ instr # instrs @ post) \<longrightarrow>
exec_all G (None,hp,(os0,lvars,C,S, length pre)#frs)
(None,hp,(os1,lvars,C,S,(length pre) + (length instrs) + 1)#frs)"
lemma jump_fwd_one_step:
"\pc frs.
exec_instr instr G hp os0 lvars C S pc frs =
(None, hp, (os1, lvars, C, S, pc + (length instrs) + 1)#frs)
\<Longrightarrow> jump_fwd G C S hp lvars os0 os1 instr instrs"
apply (unfold jump_fwd_def)
apply (intro strip)
apply (rule exec_instr_in_exec_all)
apply auto
done
lemma jump_fwd_progression_aux:
"\ instrs_comb = instr # instrs0 @ instrs1;
jump_fwd G C S hp lvars os0 os1 instr instrs0;
{G, C, S} \<turnstile> {hp, os1, lvars} >- instrs1 \<rightarrow> {hp2, os2, lvars2} \<rbrakk>
\<Longrightarrow> {G, C, S} \<turnstile> {hp, os0, lvars} >- instrs_comb \<rightarrow> {hp2, os2, lvars2}"
apply (simp only: progression_def jump_fwd_def)
apply (intro strip)
apply (rule_tac ?s1.0 = "Norm(hp, (os1, lvars, C, S, length pre + length instrs0 + 1) # frs)" in exec_all_trans)
apply (simp only: append_assoc)
apply (subgoal_tac "pre @ (instr # instrs0 @ instrs1) @ post = pre @ instr # instrs0 @ (instrs1 @ post)")
apply blast
apply simp
apply (erule thin_rl, erule thin_rl)
apply (drule_tac x="pre @ instr # instrs0" in spec)
apply (simp add: add.assoc)
done
lemma jump_fwd_progression:
"\ instrs_comb = instr # instrs0 @ instrs1;
\<forall> pc frs.
exec_instr instr G hp os0 lvars C S pc frs =
(None, hp, (os1, lvars, C, S, pc + (length instrs0) + 1)#frs);
{G, C, S} \<turnstile> {hp, os1, lvars} >- instrs1 \<rightarrow> {hp2, os2, lvars2} \<rbrakk>
\<Longrightarrow> {G, C, S} \<turnstile> {hp, os0, lvars} >- instrs_comb \<rightarrow> {hp2, os2, lvars2}"
apply (rule jump_fwd_progression_aux)
apply assumption
apply (rule jump_fwd_one_step, assumption+)
done
(* note: instrs and instr reversed wrt. jump_fwd *)
definition jump_bwd :: "jvm_prog \ cname \ sig \
aheap \<Rightarrow> locvars \<Rightarrow> opstack \<Rightarrow> opstack \<Rightarrow>
bytecode \<Rightarrow> instr \<Rightarrow> bool" where
"jump_bwd G C S hp lvars os0 os1 instrs instr ==
\<forall> pre post frs.
(gis (gmb G C S) = pre @ instrs @ instr # post) \<longrightarrow>
exec_all G (None,hp,(os0,lvars,C,S, (length pre) + (length instrs))#frs)
(None,hp,(os1,lvars,C,S, (length pre))#frs)"
lemma jump_bwd_one_step:
"\ pc frs.
exec_instr instr G hp os0 lvars C S (pc + (length instrs)) frs =
(None, hp, (os1, lvars, C, S, pc)#frs)
\<Longrightarrow>
jump_bwd G C S hp lvars os0 os1 instrs instr"
apply (unfold jump_bwd_def)
apply (intro strip)
apply (rule exec_instr_in_exec_all)
apply auto
done
lemma jump_bwd_progression:
"\ instrs_comb = instrs @ [instr];
{G, C, S} \<turnstile> {hp0, os0, lvars0} >- instrs \<rightarrow> {hp1, os1, lvars1};
jump_bwd G C S hp1 lvars1 os1 os2 instrs instr;
{G, C, S} \<turnstile> {hp1, os2, lvars1} >- instrs_comb \<rightarrow> {hp3, os3, lvars3} \<rbrakk>
\<Longrightarrow> {G, C, S} \<turnstile> {hp0, os0, lvars0} >- instrs_comb \<rightarrow> {hp3, os3, lvars3}"
apply (simp only: progression_def jump_bwd_def)
apply (intro strip)
apply (rule exec_all_trans, force)
apply (rule exec_all_trans, force)
apply (rule exec_all_trans, force)
apply simp
apply (rule exec_all_refl)
done
(**********************************************************************)
(* class C with signature S is defined in program G *)
definition class_sig_defined :: "'c prog \ cname \ sig \ bool" where
"class_sig_defined G C S ==
is_class G C \<and> (\<exists> D rT mb. (method (G, C) S = Some (D, rT, mb)))"
(* The environment of a java method body
(characterized by class and signature) *)
definition env_of_jmb :: "java_mb prog \ cname \ sig \ java_mb env" where
"env_of_jmb G C S ==
(let (mn,pTs) = S;
(D,rT,(pns,lvars,blk,res)) = the(method (G, C) S) in
(G,map_of lvars(pns[\<mapsto>]pTs)(This\<mapsto>Class C)))"
lemma env_of_jmb_fst [simp]: "fst (env_of_jmb G C S) = G"
by (simp add: env_of_jmb_def split_beta)
(**********************************************************************)
lemma method_preserves [rule_format (no_asm)]:
"\ wf_prog wf_mb G; is_class G C;
\<forall> S rT mb. \<forall> cn \<in> fst ` set G. wf_mdecl wf_mb G cn (S,rT,mb) \<longrightarrow> (P cn S (rT,mb))\<rbrakk>
\<Longrightarrow> \<forall> D.
method (G, C) S = Some (D, rT, mb) \<longrightarrow> (P D S (rT,mb))"
apply (frule wf_prog_ws_prog [THEN wf_subcls1])
apply (rule subcls1_induct, assumption, assumption)
apply (intro strip)
apply ((drule spec)+, drule_tac x="Object" in bspec)
apply (simp add: wf_prog_def ws_prog_def wf_syscls_def)
apply (subgoal_tac "D=Object") apply simp
apply (drule mp)
apply (frule_tac C=Object in method_wf_mdecl)
apply simp
apply assumption
apply simp
apply assumption
apply simp
apply (simplesubst method_rec)
apply simp
apply force
apply simp
apply (simp only: map_add_def)
apply (split option.split)
apply (rule conjI)
apply force
apply (intro strip)
apply (frule_tac ?P1.0 = "wf_mdecl wf_mb G Ca" and
?P2.0 = "%(S, (Da, rT, mb)). P Da S (rT, mb)" in map_of_map_prop)
apply (force simp: wf_cdecl_def)
apply clarify
apply (simp only: class_def)
apply (drule map_of_SomeD)+
apply (frule_tac A="set G" and f=fst in imageI, simp)
apply blast
apply simp
done
lemma method_preserves_length:
"\ wf_java_prog G; is_class G C;
method (G, C) (mn,pTs) = Some (D, rT, pns, lvars, blk, res)\<rbrakk>
\<Longrightarrow> length pns = length pTs"
apply (frule_tac P="%D (mn,pTs) (rT, pns, lvars, blk, res). length pns = length pTs"
in method_preserves)
apply (auto simp: wf_mdecl_def wf_java_mdecl_def)
done
(**********************************************************************)
definition wtpd_expr :: "java_mb env \ expr \ bool" where
"wtpd_expr E e == (\ T. E\e :: T)"
definition wtpd_exprs :: "java_mb env \ (expr list) \ bool" where
"wtpd_exprs E e == (\ T. E\e [::] T)"
definition wtpd_stmt :: "java_mb env \ stmt \ bool" where
"wtpd_stmt E c == (E\c \)"
lemma wtpd_expr_newc: "wtpd_expr E (NewC C) \ is_class (prg E) C"
by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
lemma wtpd_expr_cast: "wtpd_expr E (Cast cn e) \ (wtpd_expr E e)"
by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
lemma wtpd_expr_lacc:
"\ wtpd_expr (env_of_jmb G C S) (LAcc vn); class_sig_defined G C S \
\<Longrightarrow> vn \<in> set (gjmb_plns (gmb G C S)) \<or> vn = This"
apply (clarsimp simp: wtpd_expr_def env_of_jmb_def class_sig_defined_def galldefs)
apply (case_tac S)
apply (erule ty_expr.cases; fastforce dest: map_upds_SomeD map_of_SomeD fst_in_set_lemma)
done
lemma wtpd_expr_lass: "wtpd_expr E (vn::=e)
\<Longrightarrow> (vn \<noteq> This) & (wtpd_expr E (LAcc vn)) & (wtpd_expr E e)"
by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
lemma wtpd_expr_facc: "wtpd_expr E ({fd}a..fn)
\<Longrightarrow> (wtpd_expr E a)"
by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
lemma wtpd_expr_fass: "wtpd_expr E ({fd}a..fn:=v)
\<Longrightarrow> (wtpd_expr E ({fd}a..fn)) & (wtpd_expr E v)"
by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
lemma wtpd_expr_binop: "wtpd_expr E (BinOp bop e1 e2)
\<Longrightarrow> (wtpd_expr E e1) & (wtpd_expr E e2)"
by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
lemma wtpd_exprs_cons: "wtpd_exprs E (e # es)
\<Longrightarrow> (wtpd_expr E e) & (wtpd_exprs E es)"
by (simp only: wtpd_exprs_def wtpd_expr_def, erule exE, erule ty_exprs.cases, auto)
lemma wtpd_stmt_expr: "wtpd_stmt E (Expr e) \ (wtpd_expr E e)"
by (simp only: wtpd_stmt_def wtpd_expr_def, erule wt_stmt.cases, auto)
lemma wtpd_stmt_comp: "wtpd_stmt E (s1;; s2) \
(wtpd_stmt E s1) & (wtpd_stmt E s2)"
by (simp only: wtpd_stmt_def wtpd_expr_def, erule wt_stmt.cases, auto)
lemma wtpd_stmt_cond: "wtpd_stmt E (If(e) s1 Else s2) \
(wtpd_expr E e) & (wtpd_stmt E s1) & (wtpd_stmt E s2)
& (E\<turnstile>e::PrimT Boolean)"
by (simp only: wtpd_stmt_def wtpd_expr_def, erule wt_stmt.cases, auto)
lemma wtpd_stmt_loop: "wtpd_stmt E (While(e) s) \
(wtpd_expr E e) & (wtpd_stmt E s) & (E\<turnstile>e::PrimT Boolean)"
by (simp only: wtpd_stmt_def wtpd_expr_def, erule wt_stmt.cases, auto)
lemma wtpd_expr_call: "wtpd_expr E ({C}a..mn({pTs'}ps))
\<Longrightarrow> (wtpd_expr E a) & (wtpd_exprs E ps)
& (length ps = length pTs') & (E\a::Class C)
& (\<exists> pTs md rT.
E\<turnstile>ps[::]pTs & max_spec (prg E) C (mn, pTs) = {((md,rT),pTs')})"
apply (simp only: wtpd_expr_def wtpd_exprs_def)
apply (erule exE)
apply (ind_cases "E \ {C}a..mn( {pTs'}ps) :: T" for T)
apply (auto simp: max_spec_preserves_length)
done
lemma wtpd_blk:
"\ method (G, D) (md, pTs) = Some (D, rT, (pns, lvars, blk, res));
wf_prog wf_java_mdecl G; is_class G D \<rbrakk>
\<Longrightarrow> wtpd_stmt (env_of_jmb G D (md, pTs)) blk"
apply (simp add: wtpd_stmt_def env_of_jmb_def)
apply (frule_tac P="%D (md, pTs) (rT, (pns, lvars, blk, res)). (G, map_of lvars(pns[\]pTs)(This\Class D)) \ blk \ " in method_preserves)
apply (auto simp: wf_mdecl_def wf_java_mdecl_def)
done
lemma wtpd_res:
"\ method (G, D) (md, pTs) = Some (D, rT, (pns, lvars, blk, res));
wf_prog wf_java_mdecl G; is_class G D \<rbrakk>
\<Longrightarrow> wtpd_expr (env_of_jmb G D (md, pTs)) res"
apply (simp add: wtpd_expr_def env_of_jmb_def)
apply (frule_tac P="%D (md, pTs) (rT, (pns, lvars, blk, res)). \T. (G, map_of lvars(pns[\]pTs)(This\Class D)) \ res :: T " in method_preserves)
apply (auto simp: wf_mdecl_def wf_java_mdecl_def)
done
(**********************************************************************)
(* Is there a more elegant proof? *)
lemma evals_preserves_length:
"G\ xs -es[\]vs-> (None, s) \ length es = length vs"
apply (subgoal_tac
"\ xs'. (G \ xk -xj\xi-> xh \ True) &
(G\<turnstile> xs -es[\<succ>]vs-> xs' \<longrightarrow> (\<exists> s. (xs' = (None, s))) \<longrightarrow>
length es = length vs) &
(G \<turnstile> xc -xb-> xa \<longrightarrow> True)")
apply blast
apply (rule allI)
apply (rule Eval.eval_evals_exec.induct; simp)
done
(***********************************************************************)
(* required for translation of BinOp *)
lemma progression_Eq : "{G, C, S} \
{hp, (v2 # v1 # os), lvars}
>- [Ifcmpeq 3, LitPush (Bool False), Goto 2, LitPush (Bool True)] \<rightarrow>
{hp, (Bool (v1 = v2) # os), lvars}"
apply (case_tac "v1 = v2")
(* case v1 = v2 *)
apply (rule_tac ?instrs1.0 = "[LitPush (Bool True)]" in jump_fwd_progression)
apply (auto simp: nat_add_distrib)
apply (rule progression_one_step)
apply simp
(* case v1 \<noteq> v2 *)
apply (rule progression_one_step [THEN HOL.refl [THEN progression_transitive], simplified])
apply auto
apply (rule progression_one_step [THEN HOL.refl [THEN progression_transitive], simplified])
apply auto
apply (rule_tac ?instrs1.0 = "[]" in jump_fwd_progression)
apply (auto simp: nat_add_distrib intro: progression_refl)
done
(**********************************************************************)
(* to avoid automatic pair splits *)
declare split_paired_All [simp del] split_paired_Ex [simp del]
lemma distinct_method:
"\ wf_java_prog G; is_class G C; method (G, C) S = Some (D, rT, pns, lvars, blk, res) \ \
distinct (gjmb_plns (gmb G C S))"
apply (frule method_wf_mdecl [THEN conjunct2], assumption, assumption)
apply (case_tac S)
apply (simp add: wf_mdecl_def wf_java_mdecl_def galldefs)
apply (simp add: unique_def map_of_in_set)
apply blast
done
lemma distinct_method_if_class_sig_defined :
"\ wf_java_prog G; class_sig_defined G C S \ \ distinct (gjmb_plns (gmb G C S))"
by (auto intro: distinct_method simp: class_sig_defined_def)
lemma method_yields_wf_java_mdecl: "\ wf_java_prog G; is_class G C;
method (G, C) S = Some (D, rT, pns, lvars, blk, res) \<rbrakk> \<Longrightarrow>
wf_java_mdecl G D (S,rT,(pns,lvars,blk,res))"
apply (frule method_wf_mdecl)
apply (auto simp: wf_mdecl_def)
done
(**********************************************************************)
lemma progression_lvar_init_aux [rule_format (no_asm)]: "
\<forall> zs prfx lvals lvars0.
lvars0 = (zs @ lvars) \<longrightarrow>
(disjoint_varnames pns lvars0 \<longrightarrow>
(length lvars = length lvals) \<longrightarrow>
(Suc(length pns + length zs) = length prfx) \<longrightarrow>
({cG, D, S} \<turnstile>
{h, os, (prfx @ lvals)}
>- (concat (map (compInit (pns, lvars0, blk, res)) lvars)) \<rightarrow>
{h, os, (prfx @ (map (\<lambda>p. (default_val (snd p))) lvars))}))"
apply simp
apply (induct lvars)
apply (clarsimp, rule progression_refl)
apply (intro strip)
apply (case_tac lvals)
apply simp
apply (simp (no_asm_simp) )
apply (rule_tac ?lvars1.0 = "(prfx @ [default_val (snd a)]) @ list" in progression_transitive, rule HOL.refl)
apply (case_tac a)
apply (simp (no_asm_simp) add: compInit_def)
apply (rule_tac ?instrs0.0 = "[load_default_val b]" in progression_transitive, simp)
apply (rule progression_one_step)
apply (simp (no_asm_simp) add: load_default_val_def)
apply (rule progression_one_step)
apply (simp (no_asm_simp))
apply (rule conjI, simp)+
apply (simp add: index_of_var2)
apply (drule_tac x="zs @ [a]" in spec) (* instantiate zs *)
apply (drule mp, simp)
apply (drule_tac x="(prfx @ [default_val (snd a)])" in spec) (* instantiate prfx *)
apply auto
done
lemma progression_lvar_init [rule_format (no_asm)]:
"\ wf_java_prog G; is_class G C;
method (G, C) S = Some (D, rT, pns, lvars, blk, res) \<rbrakk> \<Longrightarrow>
length pns = length pvs \<longrightarrow>
(\<forall> lvals.
length lvars = length lvals \<longrightarrow>
{cG, D, S} \<turnstile>
{h, os, (a' # pvs @ lvals)}
>- (compInitLvars (pns, lvars, blk, res) lvars) \<rightarrow>
{h, os, (locvars_xstate G C S (Norm (h, init_vars lvars(pns[\<mapsto>]pvs)(This\<mapsto>a'))))})"
apply (simp only: compInitLvars_def)
apply (frule method_yields_wf_java_mdecl, assumption, assumption)
apply (simp only: wf_java_mdecl_def)
apply (subgoal_tac "(\y\set pns. y \ set (map fst lvars))")
apply (simp add: init_vars_def locvars_xstate_def locvars_locals_def galldefs unique_def split_def map_of_map_as_map_upd del: map_map)
apply (intro strip)
apply (simp (no_asm_simp) only: append_Cons [symmetric])
apply (rule progression_lvar_init_aux)
apply (auto simp: unique_def map_of_in_set disjoint_varnames_def)
done
(**********************************************************************)
lemma state_ok_eval:
"\xs::\E; wf_java_prog (prg E); wtpd_expr E e; (prg E)\xs -e\v -> xs'\ \ xs'::\E"
apply (simp only: wtpd_expr_def)
apply (erule exE)
apply (case_tac xs', case_tac xs)
apply (auto intro: eval_type_sound [THEN conjunct1])
done
lemma state_ok_evals:
"\xs::\E; wf_java_prog (prg E); wtpd_exprs E es; prg E \ xs -es[\]vs-> xs'\ \ xs'::\E"
apply (simp only: wtpd_exprs_def)
apply (erule exE)
apply (case_tac xs)
apply (case_tac xs')
apply (auto intro: evals_type_sound [THEN conjunct1])
done
lemma state_ok_exec:
"\xs::\E; wf_java_prog (prg E); wtpd_stmt E st; prg E \ xs -st-> xs'\ \ xs'::\E"
apply (simp only: wtpd_stmt_def)
apply (case_tac xs', case_tac xs)
apply (auto dest: exec_type_sound)
done
lemma state_ok_init:
"\ wf_java_prog G; (x, h, l)::\(env_of_jmb G C S);
is_class G dynT;
method (G, dynT) (mn, pTs) = Some (md, rT, pns, lvars, blk, res);
list_all2 (conf G h) pvs pTs; G,h \<turnstile> a' ::\<preceq> Class md\<rbrakk>
\<Longrightarrow>
(np a' x, h, init_vars lvars(pns[\]pvs)(This\a'))::\(env_of_jmb G md (mn, pTs))"
apply (frule wf_prog_ws_prog)
apply (frule method_in_md [THEN conjunct2], assumption+)
apply (frule method_yields_wf_java_mdecl, assumption, assumption)
apply (simp add: env_of_jmb_def gs_def conforms_def split_beta)
apply (simp add: wf_java_mdecl_def)
apply (rule conjI)
apply (rule lconf_ext)
apply (rule lconf_ext_list)
apply (rule lconf_init_vars)
apply (auto dest: Ball_set_table)
apply (simp add: np_def xconf_raise_if)
done
lemma ty_exprs_list_all2 [rule_format (no_asm)]:
"(\ Ts. (E \ es [::] Ts) = list_all2 (\e T. E \ e :: T) es Ts)"
apply (rule list.induct)
apply simp
apply (rule allI)
apply (rule iffI)
apply (ind_cases "E \ [] [::] Ts" for Ts, assumption)
apply simp apply (rule WellType.Nil)
apply (simp add: list_all2_Cons1)
apply (rule allI)
apply (rule iffI)
apply (rename_tac a exs Ts)
apply (ind_cases "E \ a # exs [::] Ts" for a exs Ts) apply blast
apply (auto intro: WellType.Cons)
done
lemma conf_bool: "G,h \ v::\PrimT Boolean \ \ b. v = Bool b"
apply (simp add: conf_def)
apply (erule exE)
apply (case_tac v)
apply (auto elim: widen.cases)
done
lemma max_spec_widen: "max_spec G C (mn, pTs) = {((md,rT),pTs')} \
list_all2 (\<lambda> T T'. G \<turnstile> T \<preceq> T') pTs pTs'"
by (blast dest: singleton_in_set max_spec2appl_meths appl_methsD)
lemma eval_conf: "\G \ s -e\v-> s'; wf_java_prog G; s::\E;
E\<turnstile>e::T; gx s' = None; prg E = G \<rbrakk>
\<Longrightarrow> G,gh s'\<turnstile>v::\<preceq>T"
apply (simp add: gh_def)
apply (rule_tac x3="fst s" and s3="snd s"and x'3="fst s'"
in eval_type_sound [THEN conjunct2 [THEN conjunct1 [THEN mp]], simplified])
apply assumption+
apply (simp (no_asm_use))
apply (simp only: surjective_pairing [symmetric])
apply (auto simp add: gs_def gx_def)
done
lemma evals_preserves_conf:
"\ G\ s -es[\]vs-> s'; G,gh s \ t ::\ T; E \es[::]Ts;
wf_java_prog G; s::\<preceq>E;
prg E = G \<rbrakk> \<Longrightarrow> G,gh s' \<turnstile> t ::\<preceq> T"
apply (subgoal_tac "gh s\| gh s'")
apply (frule conf_hext, assumption, assumption)
apply (frule eval_evals_exec_type_sound [THEN conjunct2 [THEN conjunct1 [THEN mp]]])
apply (subgoal_tac "G \ (gx s, (gh s, gl s)) -es[\]vs-> (gx s', (gh s', gl s'))")
apply assumption
apply (simp add: gx_def gh_def gl_def)
apply (case_tac E)
apply (simp add: gx_def gs_def gh_def gl_def)
done
lemma eval_of_class:
"\ G \ s -e\a'-> s'; E \ e :: Class C; wf_java_prog G; s::\E; gx s'=None; a' \ Null; G=prg E\
\<Longrightarrow> (\<exists> lc. a' = Addr lc)"
apply (case_tac s, case_tac s', simp)
apply (frule eval_type_sound, (simp add: gs_def)+)
apply (case_tac a')
apply (auto simp: conf_def)
done
lemma dynT_subcls:
"\ a' \ Null; G,h\a'::\ Class C; dynT = fst (the (h (the_Addr a')));
is_class G dynT; ws_prog G \<rbrakk> \<Longrightarrow> G\<turnstile>dynT \<preceq>C C"
apply (case_tac "C = Object")
apply (simp, rule subcls_C_Object, assumption+)
apply simp
apply (frule non_np_objD, auto)
done
lemma method_defined: "\
m = the (method (G, dynT) (mn, pTs));
dynT = fst (the (h a)); is_class G dynT; wf_java_prog G;
a' \ Null; G,h\a'::\ Class C; a = the_Addr a';
\<exists>pTsa md rT. max_spec G C (mn, pTsa) = {((md, rT), pTs)} \<rbrakk>
\<Longrightarrow> (method (G, dynT) (mn, pTs)) = Some m"
apply (erule exE)+
apply (drule singleton_in_set, drule max_spec2appl_meths)
apply (simp add: appl_methds_def)
apply (elim exE conjE)
apply (drule widen_methd)
apply (auto intro!: dynT_subcls)
done
(**********************************************************************)
(* 1. any difference between locvars_xstate \<dots> and L ??? *)
(* 2. possibly skip env_of_jmb ??? *)
theorem compiler_correctness:
"wf_java_prog G \
(G \<turnstile> xs -ex\<succ>val-> xs' \<longrightarrow>
gx xs = None \<longrightarrow> gx xs' = None \<longrightarrow>
(\<forall> os CL S.
(class_sig_defined G CL S) \<longrightarrow>
(wtpd_expr (env_of_jmb G CL S) ex) \<longrightarrow>
(xs ::\<preceq> (env_of_jmb G CL S)) \<longrightarrow>
( {TranslComp.comp G, CL, S} \<turnstile>
{gh xs, os, (locvars_xstate G CL S xs)}
>- (compExpr (gmb G CL S) ex) \<rightarrow>
{gh xs', val#os, locvars_xstate G CL S xs'}))) \<and>
(G \<turnstile> xs -exs[\<succ>]vals-> xs' \<longrightarrow>
gx xs = None \<longrightarrow> gx xs' = None \<longrightarrow>
(\<forall> os CL S.
(class_sig_defined G CL S) \<longrightarrow>
(wtpd_exprs (env_of_jmb G CL S) exs) \<longrightarrow>
(xs::\<preceq>(env_of_jmb G CL S)) \<longrightarrow>
( {TranslComp.comp G, CL, S} \<turnstile>
{gh xs, os, (locvars_xstate G CL S xs)}
>- (compExprs (gmb G CL S) exs) \<rightarrow>
{gh xs', (rev vals)@os, (locvars_xstate G CL S xs')}))) \<and>
(G \<turnstile> xs -st-> xs' \<longrightarrow>
gx xs = None \<longrightarrow> gx xs' = None \<longrightarrow>
(\<forall> os CL S.
(class_sig_defined G CL S) \<longrightarrow>
(wtpd_stmt (env_of_jmb G CL S) st) \<longrightarrow>
(xs::\<preceq>(env_of_jmb G CL S)) \<longrightarrow>
( {TranslComp.comp G, CL, S} \<turnstile>
{gh xs, os, (locvars_xstate G CL S xs)}
>- (compStmt (gmb G CL S) st) \<rightarrow>
{gh xs', os, (locvars_xstate G CL S xs')})))"
apply (rule Eval.eval_evals_exec.induct)
(* case XcptE *)
apply simp
(* case NewC *)
apply clarify
apply (frule wf_prog_ws_prog [THEN wf_subcls1]) (* establish wf ((subcls1 G)\<inverse>) *)
apply (simp add: c_hupd_hp_invariant)
apply (rule progression_one_step)
apply (rotate_tac 1, drule sym) (* reverse equation (a, None) = new_Addr (fst s) *)
apply (simp add: locvars_xstate_def locvars_locals_def comp_fields)
(* case Cast *)
apply (intro allI impI)
apply simp
apply (frule raise_if_NoneD)
apply (frule wtpd_expr_cast)
apply simp
apply (rule_tac ?instrs0.0 = "(compExpr (gmb G CL S) e)" in progression_transitive, simp)
apply blast
apply (rule progression_one_step)
apply (simp add: raise_system_xcpt_def gh_def comp_cast_ok)
(* case Lit *)
apply simp
apply (intro strip)
apply (rule progression_one_step)
apply simp
(* case BinOp *)
apply (intro allI impI)
apply (frule_tac xs=s1 in eval_xcpt, assumption) (* establish (gx s1 = None) *)
apply (frule wtpd_expr_binop)
(* establish (s1::\<preceq> \<dots>) *)
apply (frule_tac e=e1 in state_ok_eval) apply (simp (no_asm_simp))
apply simp
apply (simp (no_asm_use) only: env_of_jmb_fst)
apply (simp (no_asm_use) only: compExpr.simps compExprs.simps)
apply (rule_tac ?instrs0.0 = "compExpr (gmb G CL S) e1" in progression_transitive, simp) apply blast
apply (rule_tac ?instrs0.0 = "compExpr (gmb G CL S) e2" in progression_transitive, simp) apply blast
apply (case_tac bop)
(*subcase bop = Eq *)
apply simp
apply (rule progression_Eq)
(*subcase bop = Add *)
apply simp
apply (rule progression_one_step)
apply simp
(* case LAcc *)
apply simp
apply (intro strip)
apply (rule progression_one_step)
apply (simp add: locvars_xstate_def locvars_locals_def)
apply (frule wtpd_expr_lacc)
apply assumption
apply (simp add: gl_def)
apply (erule select_at_index)
(* case LAss *)
apply (intro allI impI)
apply (frule wtpd_expr_lass, erule conjE, erule conjE)
apply simp
apply (rule_tac ?instrs0.0 = "(compExpr (gmb G CL S) e)" in progression_transitive, rule HOL.refl)
apply blast
apply (rule_tac ?instrs0.0 = "[Dup]" in progression_transitive, simp)
apply (rule progression_one_step)
apply (simp add: gh_def)
apply simp
apply (rule progression_one_step)
apply (simp add: gh_def)
(* the following falls out of the general scheme *)
apply (frule wtpd_expr_lacc) apply assumption
apply (rule update_at_index)
apply (rule distinct_method_if_class_sig_defined)
apply assumption
apply assumption
apply simp
apply assumption
(* case FAcc *)
apply (intro allI impI)
(* establish x1 = None \<and> a' \<noteq> Null *)
apply (simp (no_asm_use) only: gx_conv, frule np_NoneD)
apply (frule wtpd_expr_facc)
apply (simp (no_asm_use) only: compExpr.simps compExprs.simps)
apply (rule_tac ?instrs0.0 = "(compExpr (gmb G CL S) e)" in progression_transitive, rule HOL.refl)
apply blast
apply (rule progression_one_step)
apply (simp add: gh_def)
apply (case_tac "(the (fst s1 (the_Addr a')))")
apply (simp add: raise_system_xcpt_def)
(* case FAss *)
apply (intro allI impI)
apply (frule wtpd_expr_fass) apply (erule conjE) apply (frule wtpd_expr_facc)
apply (simp only: c_hupd_xcpt_invariant) (* establish x2 = None *)
(* establish x1 = None and a' \<noteq> Null *)
apply (frule_tac xs="(np a' x1, s1)" in eval_xcpt)
apply (simp only: gx_conv, simp only: gx_conv, frule np_NoneD, erule conjE)
(* establish ((Norm s1)::\<preceq> \<dots>) *)
apply (frule_tac e=e1 in state_ok_eval)
apply (simp (no_asm_simp) only: env_of_jmb_fst)
apply assumption
apply (simp (no_asm_use) only: env_of_jmb_fst)
apply (simp only: compExpr.simps compExprs.simps)
apply (rule_tac ?instrs0.0 = "(compExpr (gmb G CL S) e1)" in progression_transitive, rule HOL.refl)
apply fast (* blast does not seem to work - why? *)
apply (rule_tac ?instrs0.0 = "(compExpr (gmb G CL S) e2)" in progression_transitive, rule HOL.refl)
apply fast
apply (rule_tac ?instrs0.0 = "[Dup_x1]" and ?instrs1.0 = "[Putfield fn T]" in progression_transitive, simp)
(* Dup_x1 *)
apply (rule progression_one_step)
apply (simp add: gh_def)
(* Putfield \<longrightarrow> still looks nasty*)
apply (rule progression_one_step)
apply simp
apply (case_tac "(the (fst s2 (the_Addr a')))")
apply (simp add: c_hupd_hp_invariant)
apply (case_tac s2)
apply (simp add: c_hupd_conv raise_system_xcpt_def)
apply (rule locvars_xstate_par_dep, rule HOL.refl)
defer (* method call *)
(* case XcptEs *)
apply simp
(* case Nil *)
apply simp
apply (intro strip)
apply (rule progression_refl)
(* case Cons *)
apply (intro allI impI)
apply (frule_tac xs=s1 in evals_xcpt, simp only: gx_conv) (* establish gx s1 = None *)
apply (frule wtpd_exprs_cons)
(* establish ((Norm s0)::\<preceq> \<dots>) *)
apply (frule_tac e=e in state_ok_eval)
apply (simp (no_asm_simp) only: env_of_jmb_fst)
apply simp
apply (simp (no_asm_use) only: env_of_jmb_fst)
apply simp
apply (rule_tac ?instrs0.0 = "(compExpr (gmb G CL S) e)" in progression_transitive, rule HOL.refl)
apply fast
apply fast
(* case Statement: exception *)
apply simp
(* case Skip *)
apply (intro allI impI)
apply simp
apply (rule progression_refl)
(* case Expr *)
apply (intro allI impI)
apply (frule wtpd_stmt_expr)
apply simp
apply (rule_tac ?instrs0.0 = "(compExpr (gmb G CL S) e)" in progression_transitive, rule HOL.refl)
apply fast
apply (rule progression_one_step)
apply simp
(* case Comp *)
apply (intro allI impI)
apply (frule_tac xs=s1 in exec_xcpt, assumption) (* establish (gx s1 = None) *)
apply (frule wtpd_stmt_comp)
(* establish (s1::\<preceq> \<dots>) *)
apply (frule_tac st=c1 in state_ok_exec)
apply (simp (no_asm_simp) only: env_of_jmb_fst)
apply simp apply (simp (no_asm_use) only: env_of_jmb_fst)
apply simp
apply (rule_tac ?instrs0.0 = "(compStmt (gmb G CL S) c1)" in progression_transitive, rule HOL.refl)
apply fast
apply fast
(* case Cond *)
apply (intro allI impI)
apply (frule_tac xs=s1 in exec_xcpt, assumption) (* establish (gx s1 = None) *)
apply (frule wtpd_stmt_cond, (erule conjE)+)
(* establish (s1::\<preceq> \<dots>) *)
apply (frule_tac e=e in state_ok_eval)
apply (simp (no_asm_simp) only: env_of_jmb_fst)
apply assumption
apply (simp (no_asm_use) only: env_of_jmb_fst)
(* establish G,gh s1\<turnstile>v::\<preceq>PrimT Boolean *)
apply (frule eval_conf, assumption+, rule env_of_jmb_fst)
apply (frule conf_bool) (* establish \<exists>b. v = Bool b *)
apply (erule exE)
apply simp
apply (rule_tac ?instrs0.0 = "[LitPush (Bool False)]" in progression_transitive, simp (no_asm_simp))
apply (rule progression_one_step, simp)
apply (rule_tac ?instrs0.0 = "compExpr (gmb G CL S) e" in progression_transitive, rule HOL.refl)
apply fast
apply (case_tac b)
(* case b= True *)
apply simp
apply (rule_tac ?instrs0.0 = "[Ifcmpeq (2 + int (length (compStmt (gmb G CL S) c1)))]" in progression_transitive, simp)
apply (rule progression_one_step)
apply simp
apply (rule_tac ?instrs0.0 = "(compStmt (gmb G CL S) c1)" in progression_transitive, simp)
apply fast
apply (rule_tac ?instrs1.0 = "[]" in jump_fwd_progression)
apply (simp)
apply simp
apply (rule conjI, simp)
apply (simp add: nat_add_distrib)
apply (rule progression_refl)
(* case b= False *)
apply simp
apply (rule_tac ?instrs1.0 = "compStmt (gmb G CL S) c2" in jump_fwd_progression)
apply (simp)
apply (simp, rule conjI, rule HOL.refl, simp add: nat_add_distrib)
apply fast
(* case exit Loop *)
apply (intro allI impI)
apply (frule wtpd_stmt_loop, (erule conjE)+)
(* establish G,gh s1\<turnstile>v::\<preceq>PrimT Boolean *)
apply (frule eval_conf, assumption+, rule env_of_jmb_fst)
apply (frule conf_bool) (* establish \<exists>b. v = Bool b *)
apply (erule exE)
apply (case_tac b)
(* case b= True \<longrightarrow> contradiction *)
apply simp
(* case b= False *)
apply simp
apply (rule_tac ?instrs0.0 = "[LitPush (Bool False)]" in progression_transitive, simp (no_asm_simp))
apply (rule progression_one_step)
apply simp
apply (rule_tac ?instrs0.0 = "compExpr (gmb G CL S) e" in progression_transitive, rule HOL.refl)
apply fast
apply (rule_tac ?instrs1.0 = "[]" in jump_fwd_progression)
apply (simp)
apply (simp, rule conjI, rule HOL.refl, simp add: nat_add_distrib)
apply (rule progression_refl)
(* case continue Loop *)
apply (intro allI impI)
apply (frule_tac xs=s2 in exec_xcpt, assumption) (* establish (gx s2 = None) *)
apply (frule_tac xs=s1 in exec_xcpt, assumption) (* establish (gx s1 = None) *)
apply (frule wtpd_stmt_loop, (erule conjE)+)
(* establish (s1::\<preceq> \<dots>) *)
apply (frule_tac e=e in state_ok_eval)
apply (simp (no_asm_simp) only: env_of_jmb_fst)
apply simp
apply (simp (no_asm_use) only: env_of_jmb_fst)
(* establish (s2::\<preceq> \<dots>) *)
apply (frule_tac xs=s1 and st=c in state_ok_exec)
apply (simp (no_asm_simp) only: env_of_jmb_fst)
apply assumption
apply (simp (no_asm_use) only: env_of_jmb_fst)
(* establish G,gh s1\<turnstile>v::\<preceq>PrimT Boolean *)
apply (frule eval_conf, assumption+, rule env_of_jmb_fst)
apply (frule conf_bool) (* establish \<exists>b. v = Bool b *)
apply (erule exE)
apply simp
apply (rule jump_bwd_progression)
apply simp
apply (rule_tac ?instrs0.0 = "[LitPush (Bool False)]" in progression_transitive, simp (no_asm_simp))
apply (rule progression_one_step)
apply simp
apply (rule_tac ?instrs0.0 = "compExpr (gmb G CL S) e" in progression_transitive, rule HOL.refl)
apply fast
apply (case_tac b)
(* case b= True *)
apply simp
apply (rule_tac ?instrs0.0 = "[Ifcmpeq (2 + int (length (compStmt (gmb G CL S) c)))]" in progression_transitive, simp)
apply (rule progression_one_step)
apply simp
apply fast
(* case b= False \<longrightarrow> contradiction*)
apply simp
apply (rule jump_bwd_one_step)
apply simp
apply blast
(*****)
(* case method call *)
apply (intro allI impI)
apply (frule_tac xs=s3 in eval_xcpt, simp only: gx_conv) (* establish gx s3 = None *)
apply (frule exec_xcpt, assumption, simp (no_asm_use) only: gx_conv, frule np_NoneD) (* establish x = None \<and> a' \<noteq> Null *)
apply (frule evals_xcpt, simp only: gx_conv) (* establish gx s1 = None *)
apply (frule wtpd_expr_call, (erule conjE)+)
(* assumptions about state_ok and is_class *)
(* establish s1::\<preceq> (env_of_jmb G CL S) *)
apply (frule_tac xs="Norm s0" and e=e in state_ok_eval)
apply (simp (no_asm_simp) only: env_of_jmb_fst, assumption, simp (no_asm_use) only: env_of_jmb_fst)
(* establish (x, h, l)::\<preceq>(env_of_jmb G CL S) *)
apply (frule_tac xs=s1 and xs'="(x, h, l)" in state_ok_evals)
apply (simp (no_asm_simp) only: env_of_jmb_fst, assumption, simp only: env_of_jmb_fst)
(* establish \<exists> lc. a' = Addr lc *)
apply (frule (5) eval_of_class, rule env_of_jmb_fst [symmetric])
apply (subgoal_tac "G,h \ a' ::\ Class C")
apply (subgoal_tac "is_class G dynT")
(* establish method (G, dynT) (mn, pTs) = Some(md, rT, pns, lvars, blk, res) *)
apply (drule method_defined, assumption+)
apply (simp only: env_of_jmb_fst)
apply ((erule exE)+, erule conjE, (rule exI)+, assumption)
apply (subgoal_tac "is_class G md")
apply (subgoal_tac "G\Class dynT \ Class md")
apply (subgoal_tac " method (G, md) (mn, pTs) = Some (md, rT, pns, lvars, blk, res)")
apply (subgoal_tac "list_all2 (conf G h) pvs pTs")
(* establish (np a' x, h, init_vars lvars(pns[\<mapsto>]pvs)(This\<mapsto>a'))::\<preceq>(env_of_jmb G md (mn, pTs)) *)
apply (subgoal_tac "G,h \ a' ::\ Class dynT")
apply (frule (2) conf_widen)
apply (frule state_ok_init, assumption+)
apply (subgoal_tac "class_sig_defined G md (mn, pTs)")
apply (frule wtpd_blk, assumption, assumption)
apply (frule wtpd_res, assumption, assumption)
apply (subgoal_tac "s3::\(env_of_jmb G md (mn, pTs))")
apply (subgoal_tac "method (TranslComp.comp G, md) (mn, pTs) =
Some (md, rT, snd (snd (compMethod G md ((mn, pTs), rT, pns, lvars, blk, res))))")
prefer 2
apply (simp add: wf_prog_ws_prog [THEN comp_method])
apply (subgoal_tac "method (TranslComp.comp G, dynT) (mn, pTs) =
Some (md, rT, snd (snd (compMethod G md ((mn, pTs), rT, pns, lvars, blk, res))))")
prefer 2
apply (simp add: wf_prog_ws_prog [THEN comp_method])
apply (simp only: fst_conv snd_conv)
(* establish length pns = length pTs *)
apply (frule method_preserves_length, assumption, assumption)
(* establish length pvs = length ps *)
apply (frule evals_preserves_length [symmetric])
(** start evaluating subexpressions **)
apply (simp (no_asm_use) only: compExpr.simps compExprs.simps)
(* evaluate e *)
apply (rule_tac ?instrs0.0 = "(compExpr (gmb G CL S) e)" in progression_transitive, rule HOL.refl)
apply fast
(* evaluate parameters *)
apply (rule_tac ?instrs0.0 = "compExprs (gmb G CL S) ps" in progression_transitive, rule HOL.refl)
apply fast
(* invokation *)
apply (rule progression_call)
apply (intro allI impI conjI)
(* execute Invoke statement *)
apply (simp (no_asm_use) only: exec_instr.simps)
apply (erule thin_rl, erule thin_rl, erule thin_rl)
apply (simp add: compMethod_def raise_system_xcpt_def)
(* get instructions of invoked method *)
apply (simp (no_asm_simp) add: gis_def gmb_def compMethod_def)
(* var. initialization *)
apply (rule_tac ?instrs0.0 = "(compInitLvars (pns, lvars, blk, res) lvars)" in progression_transitive, rule HOL.refl)
apply (rule_tac C=md in progression_lvar_init, assumption, assumption, assumption)
apply (simp (no_asm_simp)) (* length pns = length pvs *)
apply (simp (no_asm_simp)) (* length lvars = length (replicate (length lvars) undefined) *)
(* body statement *)
apply (rule_tac ?instrs0.0 = "compStmt (pns, lvars, blk, res) blk" in progression_transitive, rule HOL.refl)
apply (subgoal_tac "(pns, lvars, blk, res) = gmb G md (mn, pTs)")
apply (simp (no_asm_simp))
apply (simp only: gh_conv)
apply (drule mp [OF _ TrueI])+
apply (erule allE, erule allE, erule allE, erule impE, assumption)+
apply ((erule impE, assumption)+, assumption)
apply (simp (no_asm_use))
apply (simp (no_asm_simp) add: gmb_def)
(* return expression *)
apply (subgoal_tac "(pns, lvars, blk, res) = gmb G md (mn, pTs)")
apply (simp (no_asm_simp))
apply (simp only: gh_conv)
apply ((drule mp, rule TrueI)+, (drule spec)+, (drule mp, assumption)+, assumption)
apply (simp (no_asm_use))
apply (simp (no_asm_simp) add: gmb_def)
(* execute return statement *)
apply (simp (no_asm_use) add: gh_def locvars_xstate_def gl_def del: drop_append)
apply (subgoal_tac "rev pvs @ a' # os = (rev (a' # pvs)) @ os")
apply (simp only: drop_append)
apply (simp (no_asm_simp))
apply (simp (no_asm_simp))
(* show s3::\<preceq>\<dots> *)
apply (rule_tac xs = "(np a' x, h, init_vars lvars(pns[\]pvs)(This\a'))" and st=blk in state_ok_exec)
apply assumption
apply (simp (no_asm_simp) only: env_of_jmb_fst)
apply assumption
apply (simp (no_asm_use) only: env_of_jmb_fst)
(* show class_sig_defined G md (mn, pTs) *)
apply (simp (no_asm_simp) add: class_sig_defined_def)
(* show G,h \<turnstile> a' ::\<preceq> Class dynT *)
apply (frule non_npD)
apply assumption
apply (erule exE)+
apply simp
apply (rule conf_obj_AddrI)
apply simp
apply (rule widen_Class_Class [THEN iffD1], rule widen.refl)
(* show list_all2 (conf G h) pvs pTs *)
apply (erule exE)+ apply (erule conjE)+
apply (rule_tac Ts="pTsa" in conf_list_gext_widen)
apply assumption
apply (subgoal_tac "G \ (gx s1, gs s1) -ps[\]pvs-> (x, h, l)")
apply (frule_tac E="env_of_jmb G CL S" in evals_type_sound)
apply assumption+
apply (simp only: env_of_jmb_fst)
apply (simp add: conforms_def xconf_def gs_def)
apply simp
apply (simp (no_asm_use) only: gx_def gs_def surjective_pairing [symmetric])
apply (simp (no_asm_use) only: ty_exprs_list_all2)
apply simp
apply simp
apply (simp (no_asm_use) only: gx_def gs_def surjective_pairing [symmetric])
(* list_all2 (\<lambda>T T'. G \<turnstile> T \<preceq> T') pTsa pTs *)
apply (rule max_spec_widen, simp only: env_of_jmb_fst)
(* show method (G, md) (mn, pTs) = Some (md, rT, pns, lvars, blk, res) *)
apply (frule wf_prog_ws_prog [THEN method_in_md [THEN conjunct2]], assumption+)
(* show G\<turnstile>Class dynT \<preceq> Class md *)
apply (simp (no_asm_use) only: widen_Class_Class)
apply (rule method_wf_mdecl [THEN conjunct1], assumption+)
(* is_class G md *)
apply (rule wf_prog_ws_prog [THEN method_in_md [THEN conjunct1]], assumption+)
(* show is_class G dynT *)
apply (frule non_npD)
apply assumption
apply (erule exE)+
apply (erule conjE)+
apply simp
apply (rule subcls_is_class2)
apply assumption
apply (frule expr_class_is_class [rotated])
apply (simp only: env_of_jmb_fst)
apply (rule wf_prog_ws_prog, assumption)
apply (simp only: env_of_jmb_fst)
(* show G,h \<turnstile> a' ::\<preceq> Class C *)
apply (simp only: wtpd_exprs_def, erule exE)
apply (frule evals_preserves_conf)
apply (rule eval_conf, assumption+)
apply (rule env_of_jmb_fst, assumption+)
apply (rule env_of_jmb_fst)
apply (simp only: gh_conv)
done
theorem compiler_correctness_eval: "
\<lbrakk> G \<turnstile> (None,hp,loc) -ex \<succ> val-> (None,hp',loc');
wf_java_prog G;
class_sig_defined G C S;
wtpd_expr (env_of_jmb G C S) ex;
(None,hp,loc) ::\<preceq> (env_of_jmb G C S) \<rbrakk> \<Longrightarrow>
{(TranslComp.comp G), C, S} \<turnstile>
{hp, os, (locvars_locals G C S loc)}
>- (compExpr (gmb G C S) ex) \<rightarrow>
{hp', val#os, (locvars_locals G C S loc')}"
apply (frule compiler_correctness [THEN conjunct1])
apply (auto simp: gh_def gx_def gs_def gl_def locvars_xstate_def)
done
theorem compiler_correctness_exec: "
\<lbrakk> G \<turnstile> Norm (hp, loc) -st-> Norm (hp', loc');
wf_java_prog G;
class_sig_defined G C S;
wtpd_stmt (env_of_jmb G C S) st;
(None,hp,loc) ::\<preceq> (env_of_jmb G C S) \<rbrakk> \<Longrightarrow>
{(TranslComp.comp G), C, S} \<turnstile>
{hp, os, (locvars_locals G C S loc)}
>- (compStmt (gmb G C S) st) \<rightarrow>
{hp', os, (locvars_locals G C S loc')}"
apply (frule compiler_correctness [THEN conjunct2 [THEN conjunct2]])
apply (auto simp: gh_def gx_def gs_def gl_def locvars_xstate_def)
done
(**********************************************************************)
(* reinstall pair splits *)
declare split_paired_All [simp] split_paired_Ex [simp]
declare wf_prog_ws_prog [simp del]
end
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