--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/code/pcDesc.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 1997, 2016, 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_VM_CODE_PCDESC_HPP
+#define SHARE_VM_CODE_PCDESC_HPP
+
+#include "memory/allocation.hpp"
+
+// PcDescs map a physical PC (given as offset from start of nmethod) to
+// the corresponding source scope and byte code index.
+
+class CompiledMethod;
+
+class PcDesc VALUE_OBJ_CLASS_SPEC {
+ friend class VMStructs;
+ private:
+ int _pc_offset; // offset from start of nmethod
+ int _scope_decode_offset; // offset for scope in nmethod
+ int _obj_decode_offset;
+
+ enum {
+ PCDESC_reexecute = 1 << 0,
+ PCDESC_is_method_handle_invoke = 1 << 1,
+ PCDESC_return_oop = 1 << 2,
+ PCDESC_rethrow_exception = 1 << 3
+ };
+
+ int _flags;
+
+ void set_flag(int mask, bool z) {
+ _flags = z ? (_flags | mask) : (_flags & ~mask);
+ }
+
+ public:
+ int pc_offset() const { return _pc_offset; }
+ int scope_decode_offset() const { return _scope_decode_offset; }
+ int obj_decode_offset() const { return _obj_decode_offset; }
+
+ void set_pc_offset(int x) { _pc_offset = x; }
+ void set_scope_decode_offset(int x) { _scope_decode_offset = x; }
+ void set_obj_decode_offset(int x) { _obj_decode_offset = x; }
+
+ // Constructor (only used for static in nmethod.cpp)
+ // Also used by ScopeDesc::sender()]
+ PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset);
+
+ enum {
+ // upper and lower exclusive limits real offsets:
+ lower_offset_limit = -1,
+ upper_offset_limit = (unsigned int)-1 >> 1
+ };
+
+ // Flags
+ bool rethrow_exception() const { return (_flags & PCDESC_rethrow_exception) != 0; }
+ void set_rethrow_exception(bool z) { set_flag(PCDESC_rethrow_exception, z); }
+ bool should_reexecute() const { return (_flags & PCDESC_reexecute) != 0; }
+ void set_should_reexecute(bool z) { set_flag(PCDESC_reexecute, z); }
+
+ // Does pd refer to the same information as pd?
+ bool is_same_info(const PcDesc* pd) {
+ return _scope_decode_offset == pd->_scope_decode_offset &&
+ _obj_decode_offset == pd->_obj_decode_offset &&
+ _flags == pd->_flags;
+ }
+
+ bool is_method_handle_invoke() const { return (_flags & PCDESC_is_method_handle_invoke) != 0; }
+ void set_is_method_handle_invoke(bool z) { set_flag(PCDESC_is_method_handle_invoke, z); }
+
+ bool return_oop() const { return (_flags & PCDESC_return_oop) != 0; }
+ void set_return_oop(bool z) { set_flag(PCDESC_return_oop, z); }
+
+ // Returns the real pc
+ address real_pc(const CompiledMethod* code) const;
+
+ void print(CompiledMethod* code);
+ bool verify(CompiledMethod* code);
+};
+
+#endif // SHARE_VM_CODE_PCDESC_HPP