84 
 85 // We move non-hot code of the nmethod entry barrier to an out-of-line stub
 86 class C2EntryBarrierStub: public C2CodeStub {
 87 private:
 88   Label _guard; // Used on AArch64 and RISCV
 89 
 90 public:
 91   C2EntryBarrierStub() : C2CodeStub(),
 92     _guard() {}
 93 
 94   Label& guard() { return _guard; }
 95 
 96   int max_size() const;
 97   void emit(C2_MacroAssembler& masm);
 98 };
 99 
100 class C2FastUnlockLightweightStub : public C2CodeStub {
101 private:
102   Register _obj;
103   Register _mark;
104   Register _t;

105   Register _thread;
106   Label _push_and_slow_path;
107   Label _check_successor;
108   Label _unlocked_continuation;
109 public:
110   C2FastUnlockLightweightStub(Register obj, Register mark, Register t, Register thread) : C2CodeStub(),
111     _obj(obj), _mark(mark), _t(t), _thread(thread) {}
112   int max_size() const;
113   void emit(C2_MacroAssembler& masm);
114   Label& push_and_slow_path() { return _push_and_slow_path; }
115   Label& check_successor() { return _check_successor; }
116   Label& unlocked_continuation() { return _unlocked_continuation; }
117   Label& slow_path_continuation() { return continuation(); }
118 };
119 
120 #ifdef _LP64
121 class C2HandleAnonOMOwnerStub : public C2CodeStub {
122 private:
123   Register _monitor;
124   Register _tmp;
125 public:
126   C2HandleAnonOMOwnerStub(Register monitor, Register tmp = noreg) : C2CodeStub(),
127     _monitor(monitor), _tmp(tmp) {}
128   Register monitor() { return _monitor; }
129   Register tmp() { return _tmp; }
130   int max_size() const;
131   void emit(C2_MacroAssembler& masm);

 84 
 85 // We move non-hot code of the nmethod entry barrier to an out-of-line stub
 86 class C2EntryBarrierStub: public C2CodeStub {
 87 private:
 88   Label _guard; // Used on AArch64 and RISCV
 89 
 90 public:
 91   C2EntryBarrierStub() : C2CodeStub(),
 92     _guard() {}
 93 
 94   Label& guard() { return _guard; }
 95 
 96   int max_size() const;
 97   void emit(C2_MacroAssembler& masm);
 98 };
 99 
100 class C2FastUnlockLightweightStub : public C2CodeStub {
101 private:
102   Register _obj;
103   Register _mark;
104   Register _t1;
105   Register _t2;
106   Register _thread;
107   Label _push_and_slow_path;
108   Label _check_successor;
109   Label _unlocked_continuation;
110 public:
111   C2FastUnlockLightweightStub(Register obj, Register mark, Register t1, Register t2, Register thread) : C2CodeStub(),
112     _obj(obj), _mark(mark), _t1(t1), _t2(t2), _thread(thread) {}
113   int max_size() const;
114   void emit(C2_MacroAssembler& masm);
115   Label& push_and_slow_path() { return _push_and_slow_path; }
116   Label& check_successor() { return _check_successor; }
117   Label& unlocked_continuation() { return _unlocked_continuation; }
118   Label& slow_path_continuation() { return continuation(); }
119 };
120 
121 #ifdef _LP64
122 class C2HandleAnonOMOwnerStub : public C2CodeStub {
123 private:
124   Register _monitor;
125   Register _tmp;
126 public:
127   C2HandleAnonOMOwnerStub(Register monitor, Register tmp = noreg) : C2CodeStub(),
128     _monitor(monitor), _tmp(tmp) {}
129   Register monitor() { return _monitor; }
130   Register tmp() { return _tmp; }
131   int max_size() const;
132   void emit(C2_MacroAssembler& masm);