1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_COMPILER_DEX_VERIFIED_METHODS_DATA_H_
#define ART_COMPILER_DEX_VERIFIED_METHODS_DATA_H_
#include <stdint.h>
#include <set>
#include <vector>
#include "base/macros.h"
#include "base/mutex.h"
#include "class_reference.h"
#include "method_reference.h"
#include "safe_map.h"
namespace art {
namespace verifier {
class MethodVerifier;
} // namespace verifier
class VerifiedMethodsData {
public:
VerifiedMethodsData();
~VerifiedMethodsData();
bool ProcessVerifiedMethod(verifier::MethodVerifier* method_verifier)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
LOCKS_EXCLUDED(dex_gc_maps_lock_, devirt_maps_lock_, safecast_map_lock_);
const std::vector<uint8_t>* GetDexGcMap(MethodReference ref)
LOCKS_EXCLUDED(dex_gc_maps_lock_);
const MethodReference* GetDevirtMap(const MethodReference& ref, uint32_t dex_pc)
LOCKS_EXCLUDED(devirt_maps_lock_);
// Returns true if the cast can statically be verified to be redundant
// by using the check-cast elision peephole optimization in the verifier
bool IsSafeCast(MethodReference ref, uint32_t pc) LOCKS_EXCLUDED(safecast_map_lock_);
void AddRejectedClass(ClassReference ref) LOCKS_EXCLUDED(rejected_classes_lock_);
bool IsClassRejected(ClassReference ref) LOCKS_EXCLUDED(rejected_classes_lock_);
static bool IsCandidateForCompilation(MethodReference& method_ref,
const uint32_t access_flags);
private:
/*
* Generate the GC map for a method that has just been verified (i.e. we're doing this as part of
* verification). For type-precise determination we have all the data we need, so we just need to
* encode it in some clever fashion.
* Returns a pointer to a newly-allocated RegisterMap, or NULL on failure.
*/
const std::vector<uint8_t>* GenerateGcMap(verifier::MethodVerifier* method_verifier);
// Verify that the GC map associated with method_ is well formed
void VerifyGcMap(verifier::MethodVerifier* method_verifier, const std::vector<uint8_t>& data);
// Compute sizes for GC map data
void ComputeGcMapSizes(verifier::MethodVerifier* method_verifier,
size_t* gc_points, size_t* ref_bitmap_bits, size_t* log2_max_gc_pc);
// All the GC maps that the verifier has created
typedef SafeMap<const MethodReference, const std::vector<uint8_t>*,
MethodReferenceComparator> DexGcMapTable;
ReaderWriterMutex dex_gc_maps_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
DexGcMapTable dex_gc_maps_ GUARDED_BY(dex_gc_maps_lock_);
void SetDexGcMap(MethodReference ref, const std::vector<uint8_t>* dex_gc_map)
LOCKS_EXCLUDED(dex_gc_maps_lock_);
// Cast elision types.
// Since we're adding the dex PCs to the set in increasing order, a sorted vector
// is better for performance (not just memory usage), especially for large sets.
typedef std::vector<uint32_t> MethodSafeCastSet;
typedef SafeMap<MethodReference, const MethodSafeCastSet*,
MethodReferenceComparator> SafeCastMap;
MethodSafeCastSet* GenerateSafeCastSet(verifier::MethodVerifier* method_verifier)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void SetSafeCastMap(MethodReference ref, const MethodSafeCastSet* mscs)
LOCKS_EXCLUDED(safecast_map_lock_);
ReaderWriterMutex safecast_map_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
SafeCastMap safecast_map_ GUARDED_BY(safecast_map_lock_);
// Devirtualization map.
typedef SafeMap<uint32_t, MethodReference> PcToConcreteMethodMap;
typedef SafeMap<MethodReference, const PcToConcreteMethodMap*,
MethodReferenceComparator> DevirtualizationMapTable;
PcToConcreteMethodMap* GenerateDevirtMap(verifier::MethodVerifier* method_verifier)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
ReaderWriterMutex devirt_maps_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
DevirtualizationMapTable devirt_maps_ GUARDED_BY(devirt_maps_lock_);
void SetDevirtMap(MethodReference ref, const PcToConcreteMethodMap* pc_method_map)
LOCKS_EXCLUDED(devirt_maps_lock_);
// Rejected classes
typedef std::set<ClassReference> RejectedClassesTable;
ReaderWriterMutex rejected_classes_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
RejectedClassesTable rejected_classes_ GUARDED_BY(rejected_classes_lock_);
};
} // namespace art
#endif // ART_COMPILER_DEX_VERIFIED_METHODS_DATA_H_
|
