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
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* Copyright (C) 2018 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.
*/
// The interpreter function takes considerable time to compile and link.
// We compile the explicit definitions separately to speed up the build.
#include "interpreter_switch_impl-inl.h"
namespace art HIDDEN {
namespace interpreter {
// Define the helper class that does not do any transaction checks.
class InactiveTransactionChecker {
public:
ALWAYS_INLINE static bool WriteConstraint([[maybe_unused]] Thread* self,
[[maybe_unused]] ObjPtr<mirror::Object> obj)
REQUIRES_SHARED(Locks::mutator_lock_) {
return false;
}
ALWAYS_INLINE static bool WriteValueConstraint([[maybe_unused]] Thread* self,
[[maybe_unused]] ObjPtr<mirror::Object> value)
REQUIRES_SHARED(Locks::mutator_lock_) {
return false;
}
ALWAYS_INLINE static bool ReadConstraint([[maybe_unused]] Thread* self,
[[maybe_unused]] ObjPtr<mirror::Object> value)
REQUIRES_SHARED(Locks::mutator_lock_) {
return false;
}
ALWAYS_INLINE static bool AllocationConstraint([[maybe_unused]] Thread* self,
[[maybe_unused]] ObjPtr<mirror::Class> klass)
REQUIRES_SHARED(Locks::mutator_lock_) {
return false;
}
ALWAYS_INLINE static bool IsTransactionAborted() {
return false;
}
static void RecordArrayElementsInTransaction([[maybe_unused]] ObjPtr<mirror::Object> array,
[[maybe_unused]] int32_t count)
REQUIRES_SHARED(Locks::mutator_lock_) {}
ALWAYS_INLINE static void RecordNewObject([[maybe_unused]] ObjPtr<mirror::Object> new_object)
REQUIRES_SHARED(Locks::mutator_lock_) {}
ALWAYS_INLINE static void RecordNewArray([[maybe_unused]] ObjPtr<mirror::Array> new_array)
REQUIRES_SHARED(Locks::mutator_lock_) {}
};
class ActiveInstrumentationHandler {
public:
ALWAYS_INLINE WARN_UNUSED
static bool HasFieldReadListeners(const instrumentation::Instrumentation* instrumentation)
REQUIRES_SHARED(Locks::mutator_lock_) {
return instrumentation->HasFieldReadListeners();
}
ALWAYS_INLINE WARN_UNUSED
static bool HasFieldWriteListeners(const instrumentation::Instrumentation* instrumentation)
REQUIRES_SHARED(Locks::mutator_lock_) {
return instrumentation->HasFieldWriteListeners();
}
ALWAYS_INLINE WARN_UNUSED
static bool HasBranchListeners(const instrumentation::Instrumentation* instrumentation)
REQUIRES_SHARED(Locks::mutator_lock_) {
return instrumentation->HasBranchListeners();
}
ALWAYS_INLINE WARN_UNUSED
static bool NeedsDexPcEvents(ShadowFrame& shadow_frame)
REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK_IMPLIES(shadow_frame.GetNotifyDexPcMoveEvents(),
Runtime::Current()->GetInstrumentation()->HasDexPcListeners());
return shadow_frame.GetNotifyDexPcMoveEvents();
}
ALWAYS_INLINE WARN_UNUSED
static bool NeedsMethodExitEvent(const instrumentation::Instrumentation* instrumentation)
REQUIRES_SHARED(Locks::mutator_lock_) {
return interpreter::NeedsMethodExitEvent(instrumentation);
}
ALWAYS_INLINE WARN_UNUSED
static bool GetForcePopFrame(ShadowFrame& shadow_frame) {
DCHECK_IMPLIES(shadow_frame.GetForcePopFrame(),
Runtime::Current()->AreNonStandardExitsEnabled());
return shadow_frame.GetForcePopFrame();
}
ALWAYS_INLINE
static void Branch(Thread* self,
ArtMethod* method,
uint32_t dex_pc,
int32_t dex_pc_offset,
const instrumentation::Instrumentation* instrumentation)
REQUIRES_SHARED(Locks::mutator_lock_) {
instrumentation->Branch(self, method, dex_pc, dex_pc_offset);
}
static bool ExceptionHandledEvent(Thread* self,
bool is_move_exception,
const instrumentation::Instrumentation* instrumentation)
REQUIRES_SHARED(Locks::mutator_lock_) {
StackHandleScope<1> hs(self);
Handle<mirror::Throwable> exception(hs.NewHandle(self->GetException()));
// Clear any exception while reporting the ExceptionHandled event. We should not run the handler
// with an exception set.
self->ClearException();
instrumentation->ExceptionHandledEvent(self, exception.Get());
// If there is an exception then that is the exception thrown by the exception handled event
// and we should just handle the new exception. The earlier exception if any is ignored.
if (self->IsExceptionPending()) {
return false; // Pending exception.
}
// Restore the original exception if the instruction we are going to execute is a move exception
// instruction.
if (is_move_exception) {
self->SetException(exception.Get());
}
return true;
}
// Unlike most other events the DexPcMovedEvent can be sent when there is a pending exception (if
// the next instruction is MOVE_EXCEPTION). This means it needs to be handled carefully to be able
// to detect exceptions thrown by the DexPcMovedEvent itself. These exceptions could be thrown by
// jvmti-agents while handling breakpoint or single step events. We had to move this into its own
// function because it was making ExecuteSwitchImpl have too large a stack.
NO_INLINE static bool DoDexPcMoveEvent(Thread* self,
const CodeItemDataAccessor& accessor,
const ShadowFrame& shadow_frame,
uint32_t dex_pc,
const instrumentation::Instrumentation* instrumentation,
JValue* save_ref)
REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(instrumentation->HasDexPcListeners());
StackHandleScope<2> hs(self);
Handle<mirror::Throwable> thr(hs.NewHandle(self->GetException()));
mirror::Object* null_obj = nullptr;
HandleWrapper<mirror::Object> h(
hs.NewHandleWrapper(LIKELY(save_ref == nullptr) ? &null_obj : save_ref->GetGCRoot()));
self->ClearException();
instrumentation->DexPcMovedEvent(self,
shadow_frame.GetThisObject(accessor.InsSize()),
shadow_frame.GetMethod(),
dex_pc);
if (UNLIKELY(self->IsExceptionPending())) {
// We got a new exception in the dex-pc-moved event.
// We just let this exception replace the old one.
// TODO It would be good to add the old exception to the
// suppressed exceptions of the new one if possible.
return false; // Pending exception.
}
if (UNLIKELY(!thr.IsNull())) {
self->SetException(thr.Get());
}
return true;
}
template <typename T>
ALWAYS_INLINE WARN_UNUSED
static bool SendMethodExitEvents(
Thread* self,
const instrumentation::Instrumentation* instrumentation,
ShadowFrame& frame,
ArtMethod* method,
T& result) REQUIRES_SHARED(Locks::mutator_lock_) {
return interpreter::SendMethodExitEvents(self, instrumentation, frame, method, result);
}
};
// Explicit definition of ExecuteSwitchImplCpp.
template HOT_ATTR
void ExecuteSwitchImplCpp<false>(SwitchImplContext* ctx);
} // namespace interpreter
} // namespace art
|