1 /*
2 * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 class ProfileData;
26 class vframeArray;
27 class MonitorValue;
28 class ObjectValue;
29
30 class Deoptimization : AllStatic {
31 public:
32 // What condition caused the deoptimization?
33 enum DeoptReason {
34 Reason_many = -1, // indicates presence of several reasons
35 Reason_none = 0, // indicates absence of a relevant deopt.
36 // Next 7 reasons are recorded per bytecode in DataLayout::trap_bits
37 Reason_null_check, // saw unexpected null or zero divisor (@bci)
38 Reason_null_assert, // saw unexpected non-null or non-zero (@bci)
39 Reason_range_check, // saw unexpected array index (@bci)
40 Reason_class_check, // saw unexpected object class (@bci)
41 Reason_array_check, // saw unexpected array class (aastore @bci)
42 Reason_intrinsic, // saw unexpected operand to intrinsic (@bci)
43 Reason_bimorphic, // saw unexpected object class in bimorphic inlining (@bci)
44
327 static UnrollBlock* fetch_unroll_info_helper(JavaThread* thread);
328
329 static DeoptAction _unloaded_action; // == Action_reinterpret;
330 static const char* _trap_reason_name[Reason_LIMIT];
331 static const char* _trap_action_name[Action_LIMIT];
332
333 static juint _deoptimization_hist[Reason_LIMIT][1+Action_LIMIT][BC_CASE_LIMIT];
334 // Note: Histogram array size is 1-2 Kb.
335
336 public:
337 static void update_method_data_from_interpreter(methodDataHandle trap_mdo, int trap_bci, int reason);
338 };
339
340 class DeoptimizationMarker : StackObj { // for profiling
341 static bool _is_active;
342 public:
343 DeoptimizationMarker() { _is_active = true; }
344 ~DeoptimizationMarker() { _is_active = false; }
345 static bool is_active() { return _is_active; }
346 };
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1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_RUNTIME_DEOPTIMIZATION_HPP
26 #define SHARE_VM_RUNTIME_DEOPTIMIZATION_HPP
27
28 #include "memory/allocation.hpp"
29 #include "runtime/frame.inline.hpp"
30
31 class ProfileData;
32 class vframeArray;
33 class MonitorValue;
34 class ObjectValue;
35
36 class Deoptimization : AllStatic {
37 public:
38 // What condition caused the deoptimization?
39 enum DeoptReason {
40 Reason_many = -1, // indicates presence of several reasons
41 Reason_none = 0, // indicates absence of a relevant deopt.
42 // Next 7 reasons are recorded per bytecode in DataLayout::trap_bits
43 Reason_null_check, // saw unexpected null or zero divisor (@bci)
44 Reason_null_assert, // saw unexpected non-null or non-zero (@bci)
45 Reason_range_check, // saw unexpected array index (@bci)
46 Reason_class_check, // saw unexpected object class (@bci)
47 Reason_array_check, // saw unexpected array class (aastore @bci)
48 Reason_intrinsic, // saw unexpected operand to intrinsic (@bci)
49 Reason_bimorphic, // saw unexpected object class in bimorphic inlining (@bci)
50
333 static UnrollBlock* fetch_unroll_info_helper(JavaThread* thread);
334
335 static DeoptAction _unloaded_action; // == Action_reinterpret;
336 static const char* _trap_reason_name[Reason_LIMIT];
337 static const char* _trap_action_name[Action_LIMIT];
338
339 static juint _deoptimization_hist[Reason_LIMIT][1+Action_LIMIT][BC_CASE_LIMIT];
340 // Note: Histogram array size is 1-2 Kb.
341
342 public:
343 static void update_method_data_from_interpreter(methodDataHandle trap_mdo, int trap_bci, int reason);
344 };
345
346 class DeoptimizationMarker : StackObj { // for profiling
347 static bool _is_active;
348 public:
349 DeoptimizationMarker() { _is_active = true; }
350 ~DeoptimizationMarker() { _is_active = false; }
351 static bool is_active() { return _is_active; }
352 };
353
354 #endif // SHARE_VM_RUNTIME_DEOPTIMIZATION_HPP
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