--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/g1/c1/g1BarrierSetC1.hpp Thu Apr 26 20:42:43 2018 +0200
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_GC_G1_C1_G1BARRIERSETC1_HPP
+#define SHARE_GC_G1_C1_G1BARRIERSETC1_HPP
+
+#include "c1/c1_CodeStubs.hpp"
+#include "gc/shared/c1/modRefBarrierSetC1.hpp"
+
+class G1PreBarrierStub: public CodeStub {
+ friend class G1BarrierSetC1;
+ private:
+ bool _do_load;
+ LIR_Opr _addr;
+ LIR_Opr _pre_val;
+ LIR_PatchCode _patch_code;
+ CodeEmitInfo* _info;
+
+ public:
+ // Version that _does_ generate a load of the previous value from addr.
+ // addr (the address of the field to be read) must be a LIR_Address
+ // pre_val (a temporary register) must be a register;
+ G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) :
+ _addr(addr), _pre_val(pre_val), _do_load(true),
+ _patch_code(patch_code), _info(info)
+ {
+ assert(_pre_val->is_register(), "should be temporary register");
+ assert(_addr->is_address(), "should be the address of the field");
+ }
+
+ // Version that _does not_ generate load of the previous value; the
+ // previous value is assumed to have already been loaded into pre_val.
+ G1PreBarrierStub(LIR_Opr pre_val) :
+ _addr(LIR_OprFact::illegalOpr), _pre_val(pre_val), _do_load(false),
+ _patch_code(lir_patch_none), _info(NULL)
+ {
+ assert(_pre_val->is_register(), "should be a register");
+ }
+
+ LIR_Opr addr() const { return _addr; }
+ LIR_Opr pre_val() const { return _pre_val; }
+ LIR_PatchCode patch_code() const { return _patch_code; }
+ CodeEmitInfo* info() const { return _info; }
+ bool do_load() const { return _do_load; }
+
+ virtual void emit_code(LIR_Assembler* e);
+ virtual void visit(LIR_OpVisitState* visitor) {
+ if (_do_load) {
+ // don't pass in the code emit info since it's processed in the fast
+ // path
+ if (_info != NULL)
+ visitor->do_slow_case(_info);
+ else
+ visitor->do_slow_case();
+
+ visitor->do_input(_addr);
+ visitor->do_temp(_pre_val);
+ } else {
+ visitor->do_slow_case();
+ visitor->do_input(_pre_val);
+ }
+ }
+#ifndef PRODUCT
+ virtual void print_name(outputStream* out) const { out->print("G1PreBarrierStub"); }
+#endif // PRODUCT
+};
+
+class G1PostBarrierStub: public CodeStub {
+ friend class G1BarrierSetC1;
+ private:
+ LIR_Opr _addr;
+ LIR_Opr _new_val;
+
+ public:
+ // addr (the address of the object head) and new_val must be registers.
+ G1PostBarrierStub(LIR_Opr addr, LIR_Opr new_val): _addr(addr), _new_val(new_val) { }
+
+ LIR_Opr addr() const { return _addr; }
+ LIR_Opr new_val() const { return _new_val; }
+
+ virtual void emit_code(LIR_Assembler* e);
+ virtual void visit(LIR_OpVisitState* visitor) {
+ // don't pass in the code emit info since it's processed in the fast path
+ visitor->do_slow_case();
+ visitor->do_input(_addr);
+ visitor->do_input(_new_val);
+ }
+#ifndef PRODUCT
+ virtual void print_name(outputStream* out) const { out->print("G1PostBarrierStub"); }
+#endif // PRODUCT
+};
+
+class CodeBlob;
+
+class G1BarrierSetC1 : public ModRefBarrierSetC1 {
+ protected:
+ CodeBlob* _pre_barrier_c1_runtime_code_blob;
+ CodeBlob* _post_barrier_c1_runtime_code_blob;
+
+ virtual void pre_barrier(LIRAccess& access, LIR_Opr addr_opr,
+ LIR_Opr pre_val, CodeEmitInfo* info);
+ virtual void post_barrier(LIRAccess& access, LIR_OprDesc* addr, LIR_OprDesc* new_val);
+
+ virtual void load_at_resolved(LIRAccess& access, LIR_Opr result);
+
+ public:
+ G1BarrierSetC1()
+ : _pre_barrier_c1_runtime_code_blob(NULL),
+ _post_barrier_c1_runtime_code_blob(NULL) {}
+
+ CodeBlob* pre_barrier_c1_runtime_code_blob() { return _pre_barrier_c1_runtime_code_blob; }
+ CodeBlob* post_barrier_c1_runtime_code_blob() { return _post_barrier_c1_runtime_code_blob; }
+
+ virtual void generate_c1_runtime_stubs(BufferBlob* buffer_blob);
+};
+
+#endif // SHARE_GC_G1_C1_G1BARRIERSETC1_HPP