8220343: Move scavenge_root_nmethods from shared code
Reviewed-by: kvn, eosterlund
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#ifndef SHARE_GC_SHARED_SCAVENGABLENMETHODS_HPP
#define SHARE_GC_SHARED_SCAVENGABLENMETHODS_HPP
#include "memory/allocation.hpp"
#include "utilities/macros.hpp"
class BoolObjectClosure;
class CodeBlobClosure;
class CodeBlobToOopClosure;
class nmethod;
class ScavengableNMethods : public AllStatic {
friend class VMStructs;
static nmethod* _head;
static BoolObjectClosure* _is_scavengable;
public:
static void initialize(BoolObjectClosure* is_scavengable);
static void register_nmethod(nmethod* nm);
static void unregister_nmethod(nmethod* nm);
static void verify_nmethod(nmethod* nm);
static void flush_nmethod(nmethod* nm);
static void prune_nmethods();
// Apply f to every live code blob in scavengable nmethods. Prune nmethods
// from the list of scavengable nmethods if f->fix_relocations() and a nmethod
// no longer has scavengable oops. If f->fix_relocations(), then f must copy
// objects to their new location immediately to avoid fixing nmethods on the
// basis of the old object locations.
static void scavengable_nmethods_do(CodeBlobToOopClosure* f);
static void asserted_non_scavengable_nmethods_do(CodeBlobClosure* f = NULL) PRODUCT_RETURN;
private:
static void unlist_nmethod(nmethod* nm, nmethod* prev);
static bool has_scavengable_oops(nmethod* nm);
static void mark_on_list_nmethods() PRODUCT_RETURN;
static void verify_unlisted_nmethods(CodeBlobClosure* f_or_null) PRODUCT_RETURN;
};
#endif // SHARE_GC_SHARED_SCAVENGABLENMETHODS_HPP