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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* Copyright (C) 2012 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_SRC_INVOKE_ARG_ARRAY_BUILDER_H_
#define ART_SRC_INVOKE_ARG_ARRAY_BUILDER_H_
#include "mirror/object.h"
#include "scoped_thread_state_change.h"
namespace art {
static inline size_t NumArgArrayBytes(const char* shorty, uint32_t shorty_len) {
size_t num_bytes = 0;
for (size_t i = 1; i < shorty_len; ++i) {
char ch = shorty[i];
if (ch == 'D' || ch == 'J') {
num_bytes += 8;
} else if (ch == 'L') {
// Argument is a reference or an array. The shorty descriptor
// does not distinguish between these types.
num_bytes += sizeof(mirror::Object*);
} else {
num_bytes += 4;
}
}
return num_bytes;
}
class ArgArray {
public:
explicit ArgArray(const char* shorty, uint32_t shorty_len)
: shorty_(shorty), shorty_len_(shorty_len), num_bytes_(0) {
size_t num_slots = shorty_len + 1; // +1 in case of receiver.
if (LIKELY((num_slots * 2) < kSmallArgArraySize)) {
// We can trivially use the small arg array.
arg_array_ = small_arg_array_;
} else {
// Analyze shorty to see if we need the large arg array.
for (size_t i = 1; i < shorty_len; ++i) {
char c = shorty[i];
if (c == 'J' || c == 'D') {
num_slots++;
}
}
if (num_slots <= kSmallArgArraySize) {
arg_array_ = small_arg_array_;
} else {
large_arg_array_.reset(new uint32_t[num_slots]);
arg_array_ = large_arg_array_.get();
}
}
}
uint32_t* GetArray() {
return arg_array_;
}
uint32_t GetNumBytes() {
return num_bytes_;
}
void Append(uint32_t value) {
arg_array_[num_bytes_ / 4] = value;
num_bytes_ += 4;
}
void AppendWide(uint64_t value) {
// For ARM and MIPS portable, align wide values to 8 bytes (ArgArray starts at offset of 4).
#if defined(ART_USE_PORTABLE_COMPILER) && (defined(__arm__) || defined(__mips__))
if (num_bytes_ % 8 == 0) {
num_bytes_ += 4;
}
#endif
arg_array_[num_bytes_ / 4] = value;
arg_array_[(num_bytes_ / 4) + 1] = value >> 32;
num_bytes_ += 8;
}
void BuildArgArray(const ScopedObjectAccess& soa, mirror::Object* receiver, va_list ap)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
// Set receiver if non-null (method is not static)
if (receiver != NULL) {
Append(reinterpret_cast<int32_t>(receiver));
}
for (size_t i = 1; i < shorty_len_; ++i) {
switch (shorty_[i]) {
case 'Z':
case 'B':
case 'C':
case 'S':
case 'I':
Append(va_arg(ap, jint));
break;
case 'F': {
JValue value;
value.SetF(va_arg(ap, jdouble));
Append(value.GetI());
break;
}
case 'L':
Append(reinterpret_cast<int32_t>(soa.Decode<mirror::Object*>(va_arg(ap, jobject))));
break;
case 'D': {
JValue value;
value.SetD(va_arg(ap, jdouble));
AppendWide(value.GetJ());
break;
}
case 'J': {
AppendWide(va_arg(ap, jlong));
break;
}
}
}
}
void BuildArgArray(const ScopedObjectAccess& soa, mirror::Object* receiver, jvalue* args)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
// Set receiver if non-null (method is not static)
if (receiver != NULL) {
Append(reinterpret_cast<int32_t>(receiver));
}
for (size_t i = 1, args_offset = 0; i < shorty_len_; ++i, ++args_offset) {
switch (shorty_[i]) {
case 'Z':
Append(args[args_offset].z);
break;
case 'B':
Append(args[args_offset].b);
break;
case 'C':
Append(args[args_offset].c);
break;
case 'S':
Append(args[args_offset].s);
break;
case 'I':
case 'F':
Append(args[args_offset].i);
break;
case 'L':
Append(reinterpret_cast<int32_t>(soa.Decode<mirror::Object*>(args[args_offset].l)));
break;
case 'D':
case 'J':
AppendWide(args[args_offset].j);
break;
}
}
}
void BuildArgArray(ShadowFrame* shadow_frame, uint32_t arg_offset)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
arg_array_ = shadow_frame->GetVRegArgs(arg_offset);
num_bytes_ = (shadow_frame->NumberOfVRegs() - arg_offset) * 4;
}
private:
enum { kSmallArgArraySize = 16 };
const char* const shorty_;
const uint32_t shorty_len_;
uint32_t num_bytes_;
uint32_t* arg_array_;
uint32_t small_arg_array_[kSmallArgArraySize];
UniquePtr<uint32_t[]> large_arg_array_;
};
} // namespace art
#endif // ART_SRC_INVOKE_ARG_ARRAY_BUILDER_H_
|
