Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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_SRC_STACK_H_ |
| 18 | #define ART_SRC_STACK_H_ |
| 19 | |
Ian Rogers | 6d4d9fc | 2011-11-30 16:24:48 -0800 | [diff] [blame] | 20 | #include "dex_file.h" |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 21 | #include "heap.h" |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 22 | #include "instrumentation.h" |
Elliott Hughes | bfe487b | 2011-10-26 15:48:55 -0700 | [diff] [blame] | 23 | #include "jni.h" |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 24 | #include "macros.h" |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 25 | #include "oat/runtime/context.h" |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 26 | |
| 27 | #include <stdint.h> |
| 28 | |
| 29 | namespace art { |
| 30 | |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 31 | class AbstractMethod; |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame^] | 32 | class Context; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 33 | class Object; |
| 34 | class ShadowFrame; |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 35 | class StackIndirectReferenceTable; |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 36 | class ScopedObjectAccess; |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 37 | class Thread; |
| 38 | |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame^] | 39 | // The kind of vreg being accessed in calls to Set/GetVReg. |
| 40 | enum VRegKind { |
| 41 | kReferenceVReg, |
| 42 | kIntVReg, |
| 43 | kFloatVReg, |
| 44 | kLongLoVReg, |
| 45 | kLongHiVReg, |
| 46 | kDoubleLoVReg, |
| 47 | kDoubleHiVReg, |
| 48 | kConstant, |
| 49 | kImpreciseConstant, |
| 50 | kUndefined, |
| 51 | }; |
| 52 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 53 | class ShadowFrame { |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 54 | public: |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 55 | static ShadowFrame* Create(uint16_t num_refs, uint16_t num_vregs, ShadowFrame* link, |
| 56 | AbstractMethod* method, uint32_t dex_pc) { |
| 57 | size_t sz = sizeof(ShadowFrame) + (sizeof(Object*) * num_refs) + (sizeof(uint32_t) * num_vregs); |
| 58 | uint8_t* memory = new uint8_t[sz]; |
| 59 | return new (memory) ShadowFrame(num_refs, num_vregs, link, method, dex_pc); |
| 60 | } |
| 61 | ~ShadowFrame() {} |
| 62 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 63 | uint32_t NumberOfReferences() const { |
| 64 | return number_of_references_; |
| 65 | } |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 66 | |
Ian Rogers | 5438ad8 | 2012-10-15 17:22:44 -0700 | [diff] [blame] | 67 | void SetNumberOfReferences(uint16_t number_of_references) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 68 | number_of_references_ = number_of_references; |
| 69 | } |
| 70 | |
Ian Rogers | 5438ad8 | 2012-10-15 17:22:44 -0700 | [diff] [blame] | 71 | void SetNumberOfVRegs(uint16_t number_of_vregs) { |
| 72 | number_of_vregs_ = number_of_vregs; |
| 73 | } |
| 74 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 75 | uint32_t GetDexPC() const { |
| 76 | return dex_pc_; |
| 77 | } |
| 78 | |
| 79 | void SetDexPC(uint32_t dex_pc) { |
| 80 | dex_pc_ = dex_pc; |
| 81 | } |
| 82 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 83 | ShadowFrame* GetLink() const { |
| 84 | return link_; |
| 85 | } |
| 86 | |
| 87 | void SetLink(ShadowFrame* frame) { |
| 88 | DCHECK_NE(this, frame); |
| 89 | link_ = frame; |
| 90 | } |
| 91 | |
| 92 | Object* GetReference(size_t i) const { |
| 93 | DCHECK_LT(i, number_of_references_); |
| 94 | return references_[i]; |
| 95 | } |
| 96 | |
| 97 | void SetReference(size_t i, Object* object) { |
| 98 | DCHECK_LT(i, number_of_references_); |
| 99 | references_[i] = object; |
| 100 | } |
Elliott Hughes | 91bf6cd | 2012-02-14 17:27:48 -0800 | [diff] [blame] | 101 | |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 102 | int32_t GetVReg(size_t i) const { |
| 103 | DCHECK_LT(i, number_of_vregs_); |
| 104 | const int8_t* vregs = reinterpret_cast<const int8_t*>(this) + VRegsOffset(); |
| 105 | return reinterpret_cast<const int32_t*>(vregs)[i]; |
| 106 | } |
| 107 | |
| 108 | float GetVRegFloat(size_t i) const { |
| 109 | DCHECK_LT(i, number_of_vregs_); |
| 110 | const int8_t* vregs = reinterpret_cast<const int8_t*>(this) + VRegsOffset(); |
| 111 | return reinterpret_cast<const float*>(vregs)[i]; |
| 112 | } |
| 113 | |
| 114 | int64_t GetVRegLong(size_t i) const { |
| 115 | const int8_t* vregs = reinterpret_cast<const int8_t*>(this) + VRegsOffset(); |
| 116 | const int32_t* low_half = &reinterpret_cast<const int32_t*>(vregs)[i]; |
| 117 | return *reinterpret_cast<const int64_t*>(low_half); |
| 118 | } |
| 119 | |
| 120 | double GetVRegDouble(size_t i) const { |
| 121 | const int8_t* vregs = reinterpret_cast<const int8_t*>(this) + VRegsOffset(); |
| 122 | const int32_t* low_half = &reinterpret_cast<const int32_t*>(vregs)[i]; |
| 123 | return *reinterpret_cast<const double*>(low_half); |
| 124 | } |
| 125 | |
| 126 | void SetVReg(size_t i, int32_t val) { |
| 127 | DCHECK_LT(i, number_of_vregs_); |
| 128 | int8_t* vregs = reinterpret_cast<int8_t*>(this) + VRegsOffset(); |
| 129 | reinterpret_cast<int32_t*>(vregs)[i] = val; |
| 130 | } |
| 131 | |
| 132 | void SetVRegFloat(size_t i, float val) { |
| 133 | DCHECK_LT(i, number_of_vregs_); |
| 134 | int8_t* vregs = reinterpret_cast<int8_t*>(this) + VRegsOffset(); |
| 135 | reinterpret_cast<float*>(vregs)[i] = val; |
| 136 | } |
| 137 | |
| 138 | void SetVRegLong(size_t i, int64_t val) { |
| 139 | int8_t* vregs = reinterpret_cast<int8_t*>(this) + VRegsOffset(); |
| 140 | int32_t* low_half = &reinterpret_cast<int32_t*>(vregs)[i]; |
| 141 | *reinterpret_cast<int64_t*>(low_half) = val; |
| 142 | } |
| 143 | |
| 144 | void SetVRegDouble(size_t i, double val) { |
| 145 | int8_t* vregs = reinterpret_cast<int8_t*>(this) + VRegsOffset(); |
| 146 | int32_t* low_half = &reinterpret_cast<int32_t*>(vregs)[i]; |
| 147 | *reinterpret_cast<double*>(low_half) = val; |
| 148 | } |
| 149 | |
| 150 | void SetReferenceAndVReg(size_t i, Object* val) { |
| 151 | SetReference(i, val); |
| 152 | SetVReg(i, reinterpret_cast<int32_t>(val)); |
| 153 | } |
| 154 | |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 155 | AbstractMethod* GetMethod() const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 156 | DCHECK_NE(method_, static_cast<void*>(NULL)); |
| 157 | return method_; |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 158 | } |
| 159 | |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 160 | void SetMethod(AbstractMethod* method) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 161 | DCHECK_NE(method, static_cast<void*>(NULL)); |
| 162 | method_ = method; |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 163 | } |
| 164 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 165 | bool Contains(Object** shadow_frame_entry) const { |
| 166 | return ((&references_[0] <= shadow_frame_entry) && |
| 167 | (shadow_frame_entry <= (&references_[number_of_references_ - 1]))); |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Mathieu Chartier | 6f1c949 | 2012-10-15 12:08:41 -0700 | [diff] [blame] | 170 | template <typename Visitor> |
| 171 | void VisitRoots(const Visitor& visitor) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 172 | size_t num_refs = NumberOfReferences(); |
| 173 | for (size_t j = 0; j < num_refs; j++) { |
| 174 | Object* object = GetReference(j); |
| 175 | if (object != NULL) { |
Mathieu Chartier | 6f1c949 | 2012-10-15 12:08:41 -0700 | [diff] [blame] | 176 | visitor(object, j); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 177 | } |
| 178 | } |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 179 | } |
| 180 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 181 | static size_t LinkOffset() { |
| 182 | return OFFSETOF_MEMBER(ShadowFrame, link_); |
| 183 | } |
| 184 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 185 | static size_t MethodOffset() { |
| 186 | return OFFSETOF_MEMBER(ShadowFrame, method_); |
| 187 | } |
| 188 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 189 | static size_t DexPCOffset() { |
| 190 | return OFFSETOF_MEMBER(ShadowFrame, dex_pc_); |
| 191 | } |
| 192 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 193 | static size_t NumberOfReferencesOffset() { |
| 194 | return OFFSETOF_MEMBER(ShadowFrame, number_of_references_); |
| 195 | } |
| 196 | |
Ian Rogers | 5438ad8 | 2012-10-15 17:22:44 -0700 | [diff] [blame] | 197 | static size_t NumberOfVRegsOffset() { |
| 198 | return OFFSETOF_MEMBER(ShadowFrame, number_of_vregs_); |
| 199 | } |
| 200 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 201 | static size_t ReferencesOffset() { |
| 202 | return OFFSETOF_MEMBER(ShadowFrame, references_); |
| 203 | } |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 204 | |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 205 | size_t VRegsOffset() const { |
Ian Rogers | 5438ad8 | 2012-10-15 17:22:44 -0700 | [diff] [blame] | 206 | return ReferencesOffset() + (sizeof(Object*) * NumberOfReferences()); |
| 207 | } |
| 208 | |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 209 | private: |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 210 | ShadowFrame(uint16_t num_refs, uint16_t num_vregs, ShadowFrame* link, AbstractMethod* method, |
| 211 | uint32_t dex_pc) |
| 212 | : number_of_references_ (num_refs), number_of_vregs_(num_vregs), link_(link), |
| 213 | method_(method), dex_pc_(dex_pc) { |
| 214 | for (size_t i = 0; i < num_refs; ++i) { |
| 215 | SetReference(i, NULL); |
| 216 | } |
| 217 | for (size_t i = 0; i < num_vregs; ++i) { |
| 218 | SetVReg(i, 0); |
| 219 | } |
| 220 | } |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 221 | |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 222 | // TODO: make the majority of these fields const. |
Ian Rogers | 5438ad8 | 2012-10-15 17:22:44 -0700 | [diff] [blame] | 223 | uint16_t number_of_references_; |
| 224 | uint16_t number_of_vregs_; |
| 225 | // Link to previous shadow frame or NULL. |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 226 | ShadowFrame* link_; |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 227 | AbstractMethod* method_; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 228 | uint32_t dex_pc_; |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 229 | Object* references_[0]; |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 230 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 231 | DISALLOW_IMPLICIT_CONSTRUCTORS(ShadowFrame); |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 232 | }; |
| 233 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 234 | // The managed stack is used to record fragments of managed code stacks. Managed code stacks |
| 235 | // may either be shadow frames or lists of frames using fixed frame sizes. Transition records are |
| 236 | // necessary for transitions between code using different frame layouts and transitions into native |
| 237 | // code. |
| 238 | class PACKED ManagedStack { |
| 239 | public: |
Ian Rogers | ca19066 | 2012-06-26 15:45:57 -0700 | [diff] [blame] | 240 | ManagedStack() |
| 241 | : link_(NULL), top_shadow_frame_(NULL), top_quick_frame_(NULL), top_quick_frame_pc_(0) {} |
Ian Rogers | 81d425b | 2012-09-27 16:03:43 -0700 | [diff] [blame] | 242 | |
| 243 | void PushManagedStackFragment(ManagedStack* fragment) { |
| 244 | // Copy this top fragment into given fragment. |
| 245 | memcpy(fragment, this, sizeof(ManagedStack)); |
| 246 | // Clear this fragment, which has become the top. |
| 247 | memset(this, 0, sizeof(ManagedStack)); |
| 248 | // Link our top fragment onto the given fragment. |
| 249 | link_ = fragment; |
| 250 | } |
| 251 | |
| 252 | void PopManagedStackFragment(const ManagedStack& fragment) { |
| 253 | DCHECK(&fragment == link_); |
| 254 | // Copy this given fragment back to the top. |
| 255 | memcpy(this, &fragment, sizeof(ManagedStack)); |
| 256 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 257 | |
| 258 | ManagedStack* GetLink() const { |
| 259 | return link_; |
| 260 | } |
| 261 | |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 262 | AbstractMethod** GetTopQuickFrame() const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 263 | return top_quick_frame_; |
| 264 | } |
| 265 | |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 266 | void SetTopQuickFrame(AbstractMethod** top) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 267 | top_quick_frame_ = top; |
| 268 | } |
| 269 | |
| 270 | uintptr_t GetTopQuickFramePc() const { |
| 271 | return top_quick_frame_pc_; |
| 272 | } |
| 273 | |
| 274 | void SetTopQuickFramePc(uintptr_t pc) { |
| 275 | top_quick_frame_pc_ = pc; |
| 276 | } |
| 277 | |
| 278 | static size_t TopQuickFrameOffset() { |
| 279 | return OFFSETOF_MEMBER(ManagedStack, top_quick_frame_); |
| 280 | } |
| 281 | |
| 282 | static size_t TopQuickFramePcOffset() { |
| 283 | return OFFSETOF_MEMBER(ManagedStack, top_quick_frame_pc_); |
| 284 | } |
| 285 | |
| 286 | ShadowFrame* PushShadowFrame(ShadowFrame* new_top_frame) { |
| 287 | ShadowFrame* old_frame = top_shadow_frame_; |
| 288 | top_shadow_frame_ = new_top_frame; |
| 289 | new_top_frame->SetLink(old_frame); |
| 290 | return old_frame; |
| 291 | } |
| 292 | |
| 293 | ShadowFrame* PopShadowFrame() { |
| 294 | CHECK(top_shadow_frame_ != NULL); |
| 295 | ShadowFrame* frame = top_shadow_frame_; |
| 296 | top_shadow_frame_ = frame->GetLink(); |
| 297 | return frame; |
| 298 | } |
| 299 | |
| 300 | ShadowFrame* GetTopShadowFrame() const { |
| 301 | return top_shadow_frame_; |
| 302 | } |
| 303 | |
| 304 | static size_t TopShadowFrameOffset() { |
| 305 | return OFFSETOF_MEMBER(ManagedStack, top_shadow_frame_); |
| 306 | } |
| 307 | |
| 308 | size_t NumShadowFrameReferences() const; |
| 309 | |
| 310 | bool ShadowFramesContain(Object** shadow_frame_entry) const; |
| 311 | |
| 312 | private: |
| 313 | ManagedStack* link_; |
| 314 | ShadowFrame* top_shadow_frame_; |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 315 | AbstractMethod** top_quick_frame_; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 316 | uintptr_t top_quick_frame_pc_; |
| 317 | }; |
| 318 | |
| 319 | class StackVisitor { |
| 320 | protected: |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 321 | StackVisitor(const ManagedStack* stack, const std::vector<InstrumentationStackFrame>* instrumentation_stack, |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 322 | Context* context) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 323 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 324 | : stack_start_(stack), instrumentation_stack_(instrumentation_stack), cur_shadow_frame_(NULL), |
Ian Rogers | ca19066 | 2012-06-26 15:45:57 -0700 | [diff] [blame] | 325 | cur_quick_frame_(NULL), cur_quick_frame_pc_(0), num_frames_(0), cur_depth_(0), |
| 326 | context_(context) {} |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 327 | |
| 328 | public: |
| 329 | virtual ~StackVisitor() {} |
| 330 | |
| 331 | // Return 'true' if we should continue to visit more frames, 'false' to stop. |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 332 | virtual bool VisitFrame() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) = 0; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 333 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 334 | void WalkStack(bool include_transitions = false) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 335 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 336 | |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 337 | AbstractMethod* GetMethod() const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 338 | if (cur_shadow_frame_ != NULL) { |
| 339 | return cur_shadow_frame_->GetMethod(); |
| 340 | } else if (cur_quick_frame_ != NULL) { |
| 341 | return *cur_quick_frame_; |
| 342 | } else { |
| 343 | return NULL; |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | bool IsShadowFrame() const { |
| 348 | return cur_shadow_frame_ != NULL; |
| 349 | } |
| 350 | |
Ian Rogers | 0c7abda | 2012-09-19 13:33:42 -0700 | [diff] [blame] | 351 | uint32_t GetDexPc() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 352 | |
| 353 | size_t GetNativePcOffset() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 354 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 355 | uintptr_t LoadCalleeSave(int num, size_t frame_size) const { |
| 356 | // Callee saves are held at the top of the frame |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 357 | AbstractMethod* method = GetMethod(); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 358 | DCHECK(method != NULL); |
| 359 | byte* save_addr = |
| 360 | reinterpret_cast<byte*>(cur_quick_frame_) + frame_size - ((num + 1) * kPointerSize); |
| 361 | #if defined(__i386__) |
| 362 | save_addr -= kPointerSize; // account for return address |
| 363 | #endif |
| 364 | return *reinterpret_cast<uintptr_t*>(save_addr); |
| 365 | } |
| 366 | |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 367 | // Returns the height of the stack in the managed stack frames, including transitions. |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 368 | size_t GetFrameHeight() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 369 | return GetNumFrames() - cur_depth_; |
| 370 | } |
| 371 | |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 372 | // Returns a frame ID for JDWP use, starting from 1. |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 373 | size_t GetFrameId() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 374 | return GetFrameHeight() + 1; |
| 375 | } |
| 376 | |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 377 | size_t GetNumFrames() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 378 | if (num_frames_ == 0) { |
| 379 | num_frames_ = ComputeNumFrames(); |
| 380 | } |
| 381 | return num_frames_; |
| 382 | } |
| 383 | |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame^] | 384 | uint32_t GetVReg(AbstractMethod* m, uint16_t vreg, VRegKind kind) const |
| 385 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 386 | |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame^] | 387 | void SetVReg(AbstractMethod* m, uint16_t vreg, uint32_t new_value, VRegKind kind) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 388 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 389 | |
| 390 | uintptr_t GetGPR(uint32_t reg) const; |
| 391 | |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 392 | uint32_t GetVReg(AbstractMethod** cur_quick_frame, const DexFile::CodeItem* code_item, |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame^] | 393 | uint32_t core_spills, uint32_t fp_spills, size_t frame_size, |
| 394 | uint16_t vreg) const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 395 | int offset = GetVRegOffset(code_item, core_spills, fp_spills, frame_size, vreg); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 396 | DCHECK_EQ(cur_quick_frame, GetCurrentQuickFrame()); |
| 397 | byte* vreg_addr = reinterpret_cast<byte*>(cur_quick_frame) + offset; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 398 | return *reinterpret_cast<uint32_t*>(vreg_addr); |
| 399 | } |
| 400 | |
| 401 | uintptr_t GetReturnPc() const; |
| 402 | |
| 403 | void SetReturnPc(uintptr_t new_ret_pc); |
| 404 | |
| 405 | /* |
| 406 | * Return sp-relative offset for a Dalvik virtual register, compiler |
| 407 | * spill or Method* in bytes using Method*. |
| 408 | * Note that (reg >= 0) refers to a Dalvik register, (reg == -2) |
| 409 | * denotes Method* and (reg <= -3) denotes a compiler temp. |
| 410 | * |
| 411 | * +------------------------+ |
| 412 | * | IN[ins-1] | {Note: resides in caller's frame} |
| 413 | * | . | |
| 414 | * | IN[0] | |
| 415 | * | caller's Method* | |
| 416 | * +========================+ {Note: start of callee's frame} |
| 417 | * | core callee-save spill | {variable sized} |
| 418 | * +------------------------+ |
| 419 | * | fp callee-save spill | |
| 420 | * +------------------------+ |
| 421 | * | filler word | {For compatibility, if V[locals-1] used as wide |
| 422 | * +------------------------+ |
| 423 | * | V[locals-1] | |
| 424 | * | V[locals-2] | |
| 425 | * | . | |
| 426 | * | . | ... (reg == 2) |
| 427 | * | V[1] | ... (reg == 1) |
| 428 | * | V[0] | ... (reg == 0) <---- "locals_start" |
| 429 | * +------------------------+ |
| 430 | * | Compiler temps | ... (reg == -2) |
| 431 | * | | ... (reg == -3) |
| 432 | * | | ... (reg == -4) |
| 433 | * +------------------------+ |
| 434 | * | stack alignment padding| {0 to (kStackAlignWords-1) of padding} |
| 435 | * +------------------------+ |
| 436 | * | OUT[outs-1] | |
| 437 | * | OUT[outs-2] | |
| 438 | * | . | |
| 439 | * | OUT[0] | |
| 440 | * | curMethod* | ... (reg == -1) <<== sp, 16-byte aligned |
| 441 | * +========================+ |
| 442 | */ |
| 443 | static int GetVRegOffset(const DexFile::CodeItem* code_item, |
Ian Rogers | b23a772 | 2012-10-09 16:54:26 -0700 | [diff] [blame] | 444 | uint32_t core_spills, uint32_t fp_spills, |
| 445 | size_t frame_size, int reg) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 446 | DCHECK_EQ(frame_size & (kStackAlignment - 1), 0U); |
| 447 | int num_spills = __builtin_popcount(core_spills) + __builtin_popcount(fp_spills) + 1; // Filler. |
| 448 | int num_ins = code_item->ins_size_; |
| 449 | int num_regs = code_item->registers_size_ - num_ins; |
| 450 | int locals_start = frame_size - ((num_spills + num_regs) * sizeof(uint32_t)); |
| 451 | if (reg == -2) { |
| 452 | return 0; // Method* |
| 453 | } else if (reg <= -3) { |
| 454 | return locals_start - ((reg + 1) * sizeof(uint32_t)); // Compiler temp. |
| 455 | } else if (reg < num_regs) { |
| 456 | return locals_start + (reg * sizeof(uint32_t)); // Dalvik local reg. |
| 457 | } else { |
| 458 | return frame_size + ((reg - num_regs) * sizeof(uint32_t)) + sizeof(uint32_t); // Dalvik in. |
| 459 | } |
| 460 | } |
| 461 | |
| 462 | uintptr_t GetCurrentQuickFramePc() const { |
| 463 | return cur_quick_frame_pc_; |
| 464 | } |
| 465 | |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 466 | AbstractMethod** GetCurrentQuickFrame() const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 467 | return cur_quick_frame_; |
| 468 | } |
| 469 | |
| 470 | ShadowFrame* GetCurrentShadowFrame() const { |
| 471 | return cur_shadow_frame_; |
| 472 | } |
| 473 | |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 474 | StackIndirectReferenceTable* GetCurrentSirt() const { |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 475 | AbstractMethod** sp = GetCurrentQuickFrame(); |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 476 | ++sp; // Skip Method*; SIRT comes next; |
| 477 | return reinterpret_cast<StackIndirectReferenceTable*>(sp); |
| 478 | } |
| 479 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 480 | private: |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 481 | size_t ComputeNumFrames() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 482 | |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 483 | InstrumentationStackFrame GetInstrumentationStackFrame(uint32_t depth) const { |
| 484 | return instrumentation_stack_->at(instrumentation_stack_->size() - depth - 1); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 485 | } |
| 486 | |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 487 | void SanityCheckFrame() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 488 | |
| 489 | const ManagedStack* const stack_start_; |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 490 | const std::vector<InstrumentationStackFrame>* const instrumentation_stack_; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 491 | ShadowFrame* cur_shadow_frame_; |
Mathieu Chartier | 66f1925 | 2012-09-18 08:57:04 -0700 | [diff] [blame] | 492 | AbstractMethod** cur_quick_frame_; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 493 | uintptr_t cur_quick_frame_pc_; |
| 494 | // Lazily computed, number of frames in the stack. |
| 495 | size_t num_frames_; |
| 496 | // Depth of the frame we're currently at. |
| 497 | size_t cur_depth_; |
| 498 | protected: |
| 499 | Context* const context_; |
| 500 | }; |
| 501 | |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame^] | 502 | class VmapTable { |
| 503 | public: |
| 504 | explicit VmapTable(const uint16_t* table) : table_(table) { |
| 505 | } |
| 506 | |
| 507 | uint16_t operator[](size_t i) const { |
| 508 | return table_[i + 1]; |
| 509 | } |
| 510 | |
| 511 | size_t size() const { |
| 512 | return table_[0]; |
| 513 | } |
| 514 | |
| 515 | // Is the dex register 'vreg' in the context or on the stack? Should not be called when the |
| 516 | // 'kind' is unknown or constant. |
| 517 | bool IsInContext(size_t vreg, uint32_t& vmap_offset, VRegKind kind) const { |
| 518 | DCHECK(kind == kReferenceVReg || kind == kIntVReg || kind == kFloatVReg || |
| 519 | kind == kLongLoVReg || kind == kLongHiVReg || kind == kDoubleLoVReg || |
| 520 | kind == kDoubleHiVReg || kind == kImpreciseConstant); |
| 521 | vmap_offset = 0xEBAD0FF5; |
| 522 | // TODO: take advantage of the registers being ordered |
| 523 | // TODO: we treat kImpreciseConstant as an integer below, need to ensure that such values |
| 524 | // are never promoted to floating point registers. |
| 525 | bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
| 526 | bool in_floats = false; |
| 527 | for (size_t i = 0; i < size(); ++i) { |
| 528 | // Stop if we find what we are are looking for. |
| 529 | if ((table_[i + 1] == vreg) && (in_floats == is_float)) { |
| 530 | vmap_offset = i; |
| 531 | return true; |
| 532 | } |
| 533 | // 0xffff is the marker for LR (return PC on x86), following it are spilled float registers. |
| 534 | if (table_[i + 1] == 0xffff) { |
| 535 | in_floats = true; |
| 536 | } |
| 537 | } |
| 538 | return false; |
| 539 | } |
| 540 | |
| 541 | // Compute the register number that corresponds to the entry in the vmap (vmap_offset, computed |
| 542 | // by IsInContext above). If the kind is floating point then the result will be a floating point |
| 543 | // register number, otherwise it will be an integer register number. |
| 544 | uint32_t ComputeRegister(uint32_t spill_mask, uint32_t vmap_offset, VRegKind kind) const { |
| 545 | // Compute the register we need to load from the context. |
| 546 | DCHECK(kind == kReferenceVReg || kind == kIntVReg || kind == kFloatVReg || |
| 547 | kind == kLongLoVReg || kind == kLongHiVReg || kind == kDoubleLoVReg || |
| 548 | kind == kDoubleHiVReg || kind == kImpreciseConstant); |
| 549 | // TODO: we treat kImpreciseConstant as an integer below, need to ensure that such values |
| 550 | // are never promoted to floating point registers. |
| 551 | bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
| 552 | uint32_t matches = 0; |
| 553 | if (is_float) { |
| 554 | while (table_[matches] != 0xffff) { |
| 555 | matches++; |
| 556 | } |
| 557 | } |
| 558 | CHECK_LT(vmap_offset - matches, static_cast<uint32_t>(__builtin_popcount(spill_mask))); |
| 559 | uint32_t spill_shifts = 0; |
| 560 | while (matches != (vmap_offset + 1)) { |
| 561 | DCHECK_NE(spill_mask, 0u); |
| 562 | matches += spill_mask & 1; // Add 1 if the low bit is set |
| 563 | spill_mask >>= 1; |
| 564 | spill_shifts++; |
| 565 | } |
| 566 | spill_shifts--; // wind back one as we want the last match |
| 567 | return spill_shifts; |
| 568 | } |
| 569 | private: |
| 570 | const uint16_t* table_; |
| 571 | }; |
| 572 | |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 573 | } // namespace art |
| 574 | |
| 575 | #endif // ART_SRC_STACK_H_ |