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(* Title: HOL/MicroJava/JVM/JVMState.thy
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ID: $Id$
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Author: Cornelia Pusch
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Copyright 1999 Technische Universitaet Muenchen
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State of the JVM
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*)
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JVMState = Store +
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(** frame stack **)
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types
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opstack = "val list"
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locvars = "val list"
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p_count = nat
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frame = "opstack \\<times>
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locvars \\<times>
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cname \\<times>
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sig \\<times>
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p_count"
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(* operand stack *)
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(* local variables *)
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(* name of def. class defined *)
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(* meth name+param_desc *)
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(* program counter within frame *)
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(** exceptions **)
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constdefs
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raise_xcpt :: "bool \\<Rightarrow> xcpt \\<Rightarrow> xcpt option"
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"raise_xcpt c x \\<equiv> (if c then Some x else None)"
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heap_update :: "[xcpt option,aheap,aheap] \\<Rightarrow> aheap"
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"heap_update xp hp' hp \\<equiv> if xp=None then hp' else hp"
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stk_update :: "[xcpt option,opstack,opstack] \\<Rightarrow> opstack"
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"stk_update xp stk' stk \\<equiv> if xp=None then stk' else stk"
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xcpt_update :: "[xcpt option,'a,'a] \\<Rightarrow> 'a"
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"xcpt_update xp y' y \\<equiv> if xp=None then y' else y"
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(** runtime state **)
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types
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jvm_state = "xcpt option \\<times>
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aheap \\<times>
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frame list"
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(** dynamic method lookup **)
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constdefs
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dyn_class :: "'code prog \\<times> sig \\<times> cname \\<Rightarrow> cname"
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"dyn_class \\<equiv> \\<lambda>(G,sig,C). fst(the(cmethd(G,C) sig))"
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end
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