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
196
197
198
199
200
201
202
|
/*
* Copyright (C) 2011 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.
*/
#include "runtime_support_builder.h"
#include "gc/accounting/card_table.h"
#include "ir_builder.h"
#include "monitor.h"
#include "mirror/object.h"
#include "runtime_support_llvm_func_list.h"
#include "thread.h"
#include <llvm/IR/DerivedTypes.h>
#include <llvm/IR/Function.h>
#include <llvm/IR/Module.h>
#include <llvm/IR/Type.h>
using ::llvm::BasicBlock;
using ::llvm::CallInst;
using ::llvm::Function;
using ::llvm::Value;
namespace art {
namespace llvm {
RuntimeSupportBuilder::RuntimeSupportBuilder(::llvm::LLVMContext& context,
::llvm::Module& module,
IRBuilder& irb)
: context_(context), module_(module), irb_(irb) {
memset(target_runtime_support_func_, 0, sizeof(target_runtime_support_func_));
#define GET_RUNTIME_SUPPORT_FUNC_DECL(ID, NAME) \
do { \
::llvm::Function* fn = module_.getFunction(#NAME); \
DCHECK(fn != NULL) << "Function not found: " << #NAME; \
runtime_support_func_decls_[runtime_support::ID] = fn; \
} while (0);
RUNTIME_SUPPORT_FUNC_LIST(GET_RUNTIME_SUPPORT_FUNC_DECL)
}
/* Thread */
::llvm::Value* RuntimeSupportBuilder::EmitGetCurrentThread() {
Function* func = GetRuntimeSupportFunction(runtime_support::GetCurrentThread);
CallInst* call_inst = irb_.CreateCall(func);
call_inst->setOnlyReadsMemory();
irb_.SetTBAA(call_inst, kTBAAConstJObject);
return call_inst;
}
::llvm::Value* RuntimeSupportBuilder::EmitLoadFromThreadOffset(int64_t offset, ::llvm::Type* type,
TBAASpecialType s_ty) {
Value* thread = EmitGetCurrentThread();
return irb_.LoadFromObjectOffset(thread, offset, type, s_ty);
}
void RuntimeSupportBuilder::EmitStoreToThreadOffset(int64_t offset, ::llvm::Value* value,
TBAASpecialType s_ty) {
Value* thread = EmitGetCurrentThread();
irb_.StoreToObjectOffset(thread, offset, value, s_ty);
}
::llvm::Value* RuntimeSupportBuilder::EmitSetCurrentThread(::llvm::Value* thread) {
Function* func = GetRuntimeSupportFunction(runtime_support::SetCurrentThread);
return irb_.CreateCall(func, thread);
}
/* ShadowFrame */
::llvm::Value* RuntimeSupportBuilder::EmitPushShadowFrame(::llvm::Value* new_shadow_frame,
::llvm::Value* method,
uint32_t num_vregs) {
Value* old_shadow_frame = EmitLoadFromThreadOffset(Thread::TopShadowFrameOffset().Int32Value(),
irb_.getArtFrameTy()->getPointerTo(),
kTBAARuntimeInfo);
EmitStoreToThreadOffset(Thread::TopShadowFrameOffset().Int32Value(),
new_shadow_frame,
kTBAARuntimeInfo);
// Store the method pointer
irb_.StoreToObjectOffset(new_shadow_frame,
ShadowFrame::MethodOffset(),
method,
kTBAAShadowFrame);
// Store the number of vregs
irb_.StoreToObjectOffset(new_shadow_frame,
ShadowFrame::NumberOfVRegsOffset(),
irb_.getInt32(num_vregs),
kTBAAShadowFrame);
// Store the link to previous shadow frame
irb_.StoreToObjectOffset(new_shadow_frame,
ShadowFrame::LinkOffset(),
old_shadow_frame,
kTBAAShadowFrame);
return old_shadow_frame;
}
::llvm::Value*
RuntimeSupportBuilder::EmitPushShadowFrameNoInline(::llvm::Value* new_shadow_frame,
::llvm::Value* method,
uint32_t num_vregs) {
Function* func = GetRuntimeSupportFunction(runtime_support::PushShadowFrame);
::llvm::CallInst* call_inst =
irb_.CreateCall4(func,
EmitGetCurrentThread(),
new_shadow_frame,
method,
irb_.getInt32(num_vregs));
irb_.SetTBAA(call_inst, kTBAARuntimeInfo);
return call_inst;
}
void RuntimeSupportBuilder::EmitPopShadowFrame(::llvm::Value* old_shadow_frame) {
// Store old shadow frame to TopShadowFrame
EmitStoreToThreadOffset(Thread::TopShadowFrameOffset().Int32Value(),
old_shadow_frame,
kTBAARuntimeInfo);
}
/* Exception */
::llvm::Value* RuntimeSupportBuilder::EmitGetAndClearException() {
Function* slow_func = GetRuntimeSupportFunction(runtime_support::GetAndClearException);
return irb_.CreateCall(slow_func, EmitGetCurrentThread());
}
::llvm::Value* RuntimeSupportBuilder::EmitIsExceptionPending() {
Value* exception = EmitLoadFromThreadOffset(Thread::ExceptionOffset().Int32Value(),
irb_.getJObjectTy(),
kTBAARuntimeInfo);
// If exception not null
return irb_.CreateIsNotNull(exception);
}
/* Suspend */
void RuntimeSupportBuilder::EmitTestSuspend() {
Function* slow_func = GetRuntimeSupportFunction(runtime_support::TestSuspend);
CallInst* call_inst = irb_.CreateCall(slow_func, EmitGetCurrentThread());
irb_.SetTBAA(call_inst, kTBAAJRuntime);
}
/* Monitor */
void RuntimeSupportBuilder::EmitLockObject(::llvm::Value* object) {
Function* slow_func = GetRuntimeSupportFunction(runtime_support::LockObject);
irb_.CreateCall2(slow_func, object, EmitGetCurrentThread());
}
void RuntimeSupportBuilder::EmitUnlockObject(::llvm::Value* object) {
Function* slow_func = GetRuntimeSupportFunction(runtime_support::UnlockObject);
irb_.CreateCall2(slow_func, object, EmitGetCurrentThread());
}
void RuntimeSupportBuilder::EmitMarkGCCard(::llvm::Value* value, ::llvm::Value* target_addr) {
Function* parent_func = irb_.GetInsertBlock()->getParent();
BasicBlock* bb_mark_gc_card = BasicBlock::Create(context_, "mark_gc_card", parent_func);
BasicBlock* bb_cont = BasicBlock::Create(context_, "mark_gc_card_cont", parent_func);
::llvm::Value* not_null = irb_.CreateIsNotNull(value);
irb_.CreateCondBr(not_null, bb_mark_gc_card, bb_cont);
irb_.SetInsertPoint(bb_mark_gc_card);
Value* card_table = EmitLoadFromThreadOffset(Thread::CardTableOffset().Int32Value(),
irb_.getInt8Ty()->getPointerTo(),
kTBAAConstJObject);
Value* target_addr_int = irb_.CreatePtrToInt(target_addr, irb_.getPtrEquivIntTy());
Value* card_no = irb_.CreateLShr(target_addr_int,
irb_.getPtrEquivInt(gc::accounting::CardTable::kCardShift));
Value* card_table_entry = irb_.CreateGEP(card_table, card_no);
irb_.CreateStore(irb_.getInt8(gc::accounting::CardTable::kCardDirty), card_table_entry,
kTBAARuntimeInfo);
irb_.CreateBr(bb_cont);
irb_.SetInsertPoint(bb_cont);
}
} // namespace llvm
} // namespace art
|
