1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef ART_RUNTIME_DEOPTIMIZATION_KIND_H_
18 #define ART_RUNTIME_DEOPTIMIZATION_KIND_H_
19
20 #include "base/logging.h"
21
22 namespace art {
23
24 enum class DeoptimizationKind {
25 kAotInlineCache = 0,
26 kJitInlineCache,
27 kJitSameTarget,
28 kLoopBoundsBCE,
29 kLoopNullBCE,
30 kBlockBCE,
31 kCHA,
32 kDebugging,
33 kFullFrame,
34 kLast = kFullFrame
35 };
36
GetDeoptimizationKindName(DeoptimizationKind kind)37 inline const char* GetDeoptimizationKindName(DeoptimizationKind kind) {
38 switch (kind) {
39 case DeoptimizationKind::kAotInlineCache: return "AOT inline cache";
40 case DeoptimizationKind::kJitInlineCache: return "JIT inline cache";
41 case DeoptimizationKind::kJitSameTarget: return "JIT same target";
42 case DeoptimizationKind::kLoopBoundsBCE: return "loop bounds check elimination";
43 case DeoptimizationKind::kLoopNullBCE: return "loop bounds check elimination on null";
44 case DeoptimizationKind::kBlockBCE: return "block bounds check elimination";
45 case DeoptimizationKind::kCHA: return "class hierarchy analysis";
46 case DeoptimizationKind::kDebugging: return "Deopt requested for debug support";
47 case DeoptimizationKind::kFullFrame: return "full frame";
48 }
49 LOG(FATAL) << "Unexpected kind " << static_cast<size_t>(kind);
50 UNREACHABLE();
51 }
52
53 std::ostream& operator<<(std::ostream& os, const DeoptimizationKind& kind);
54
55 // We use a DeoptimizationStackSlot to record if a deoptimization is required
56 // for functions that are already on stack. The value in the slot specifies the
57 // reason we need to deoptimize.
58 enum class DeoptimizeFlagValue: uint8_t {
59 kCHA = 0b001,
60 kForceDeoptForRedefinition = 0b010,
61 kCheckCallerForDeopt = 0b100,
62 kAll = kCHA | kForceDeoptForRedefinition | kCheckCallerForDeopt
63 };
64
65 } // namespace art
66
67 #endif // ART_RUNTIME_DEOPTIMIZATION_KIND_H_
68