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 | |
Brian Carlstrom | fc0e321 | 2013-07-17 14:40:12 -0700 | [diff] [blame] | 17 | #ifndef ART_RUNTIME_STACK_H_ |
| 18 | #define ART_RUNTIME_STACK_H_ |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 19 | |
Ian Rogers | 6d4d9fc | 2011-11-30 16:24:48 -0800 | [diff] [blame] | 20 | #include "dex_file.h" |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 21 | #include "instrumentation.h" |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 22 | #include "base/casts.h" |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 23 | #include "base/macros.h" |
Ian Rogers | 166db04 | 2013-07-26 12:05:57 -0700 | [diff] [blame] | 24 | #include "arch/context.h" |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 25 | #include "mirror/object_reference.h" |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 26 | |
| 27 | #include <stdint.h> |
Ian Rogers | 40e3bac | 2012-11-20 00:09:14 -0800 | [diff] [blame] | 28 | #include <string> |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 29 | |
| 30 | namespace art { |
| 31 | |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 32 | namespace mirror { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 33 | class ArtMethod; |
| 34 | class Object; |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 35 | } // namespace mirror |
| 36 | |
| 37 | class Context; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 38 | class ShadowFrame; |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 39 | class StackIndirectReferenceTable; |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 40 | class ScopedObjectAccess; |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 41 | class Thread; |
| 42 | |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 43 | // The kind of vreg being accessed in calls to Set/GetVReg. |
| 44 | enum VRegKind { |
| 45 | kReferenceVReg, |
| 46 | kIntVReg, |
| 47 | kFloatVReg, |
| 48 | kLongLoVReg, |
| 49 | kLongHiVReg, |
| 50 | kDoubleLoVReg, |
| 51 | kDoubleHiVReg, |
| 52 | kConstant, |
| 53 | kImpreciseConstant, |
| 54 | kUndefined, |
| 55 | }; |
| 56 | |
Razvan A Lupusoru | da7a69b | 2014-01-08 15:09:50 -0800 | [diff] [blame] | 57 | /** |
| 58 | * @brief Represents the virtual register numbers that denote special meaning. |
| 59 | * @details This is used to make some virtual register numbers to have specific |
| 60 | * semantic meaning. This is done so that the compiler can treat all virtual |
| 61 | * registers the same way and only special case when needed. For example, |
| 62 | * calculating SSA does not care whether a virtual register is a normal one or |
| 63 | * a compiler temporary, so it can deal with them in a consistent manner. But, |
| 64 | * for example if backend cares about temporaries because it has custom spill |
| 65 | * location, then it can special case them only then. |
| 66 | */ |
| 67 | enum VRegBaseRegNum : int { |
| 68 | /** |
| 69 | * @brief Virtual registers originating from dex have number >= 0. |
| 70 | */ |
| 71 | kVRegBaseReg = 0, |
| 72 | |
| 73 | /** |
| 74 | * @brief Invalid virtual register number. |
| 75 | */ |
| 76 | kVRegInvalid = -1, |
| 77 | |
| 78 | /** |
| 79 | * @brief Used to denote the base register for compiler temporaries. |
| 80 | * @details Compiler temporaries are virtual registers not originating |
| 81 | * from dex but that are created by compiler. All virtual register numbers |
| 82 | * that are <= kVRegTempBaseReg are categorized as compiler temporaries. |
| 83 | */ |
| 84 | kVRegTempBaseReg = -2, |
| 85 | |
| 86 | /** |
| 87 | * @brief Base register of temporary that holds the method pointer. |
| 88 | * @details This is a special compiler temporary because it has a specific |
| 89 | * location on stack. |
| 90 | */ |
| 91 | kVRegMethodPtrBaseReg = kVRegTempBaseReg, |
| 92 | |
| 93 | /** |
| 94 | * @brief Base register of non-special compiler temporary. |
| 95 | * @details A non-special compiler temporary is one whose spill location |
| 96 | * is flexible. |
| 97 | */ |
| 98 | kVRegNonSpecialTempBaseReg = -3, |
| 99 | }; |
| 100 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 101 | // A reference from the shadow stack to a MirrorType object within the Java heap. |
| 102 | template<class MirrorType> |
| 103 | class MANAGED StackReference : public mirror::ObjectReference<false, MirrorType> { |
| 104 | public: |
| 105 | StackReference<MirrorType>() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| 106 | : mirror::ObjectReference<false, MirrorType>(nullptr) {} |
| 107 | |
| 108 | static StackReference<MirrorType> FromMirrorPtr(MirrorType* p) |
| 109 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 110 | return StackReference<MirrorType>(p); |
| 111 | } |
| 112 | |
| 113 | private: |
| 114 | StackReference<MirrorType>(MirrorType* p) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| 115 | : mirror::ObjectReference<false, MirrorType>(p) {} |
| 116 | }; |
| 117 | |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 118 | // ShadowFrame has 3 possible layouts: |
| 119 | // - portable - a unified array of VRegs and references. Precise references need GC maps. |
| 120 | // - interpreter - separate VRegs and reference arrays. References are in the reference array. |
| 121 | // - JNI - just VRegs, but where every VReg holds a reference. |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 122 | class ShadowFrame { |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 123 | public: |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 124 | // Compute size of ShadowFrame in bytes assuming it has a reference array. |
Jeff Hao | 6613519 | 2013-05-14 11:02:41 -0700 | [diff] [blame] | 125 | static size_t ComputeSize(uint32_t num_vregs) { |
| 126 | return sizeof(ShadowFrame) + (sizeof(uint32_t) * num_vregs) + |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 127 | (sizeof(StackReference<mirror::Object>) * num_vregs); |
Jeff Hao | 6613519 | 2013-05-14 11:02:41 -0700 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | // Create ShadowFrame in heap for deoptimization. |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 131 | static ShadowFrame* Create(uint32_t num_vregs, ShadowFrame* link, |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 132 | mirror::ArtMethod* method, uint32_t dex_pc) { |
Jeff Hao | 6613519 | 2013-05-14 11:02:41 -0700 | [diff] [blame] | 133 | uint8_t* memory = new uint8_t[ComputeSize(num_vregs)]; |
Sebastien Hertz | c61124b | 2013-09-10 11:44:19 +0200 | [diff] [blame] | 134 | return Create(num_vregs, link, method, dex_pc, memory); |
Jeff Hao | 6613519 | 2013-05-14 11:02:41 -0700 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | // Create ShadowFrame for interpreter using provided memory. |
| 138 | static ShadowFrame* Create(uint32_t num_vregs, ShadowFrame* link, |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 139 | mirror::ArtMethod* method, uint32_t dex_pc, void* memory) { |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 140 | ShadowFrame* sf = new (memory) ShadowFrame(num_vregs, link, method, dex_pc, true); |
| 141 | return sf; |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 142 | } |
| 143 | ~ShadowFrame() {} |
| 144 | |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 145 | bool HasReferenceArray() const { |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 146 | #if defined(ART_USE_PORTABLE_COMPILER) |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 147 | return (number_of_vregs_ & kHasReferenceArray) != 0; |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 148 | #else |
| 149 | return true; |
| 150 | #endif |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 151 | } |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 152 | |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 153 | uint32_t NumberOfVRegs() const { |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 154 | #if defined(ART_USE_PORTABLE_COMPILER) |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 155 | return number_of_vregs_ & ~kHasReferenceArray; |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 156 | #else |
| 157 | return number_of_vregs_; |
| 158 | #endif |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 159 | } |
| 160 | |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 161 | void SetNumberOfVRegs(uint32_t number_of_vregs) { |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 162 | #if defined(ART_USE_PORTABLE_COMPILER) |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 163 | number_of_vregs_ = number_of_vregs | (number_of_vregs_ & kHasReferenceArray); |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 164 | #else |
| 165 | UNUSED(number_of_vregs); |
| 166 | UNIMPLEMENTED(FATAL) << "Should only be called when portable is enabled"; |
| 167 | #endif |
Ian Rogers | 5438ad8 | 2012-10-15 17:22:44 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 170 | uint32_t GetDexPC() const { |
| 171 | return dex_pc_; |
| 172 | } |
| 173 | |
| 174 | void SetDexPC(uint32_t dex_pc) { |
| 175 | dex_pc_ = dex_pc; |
| 176 | } |
| 177 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 178 | ShadowFrame* GetLink() const { |
| 179 | return link_; |
| 180 | } |
| 181 | |
| 182 | void SetLink(ShadowFrame* frame) { |
| 183 | DCHECK_NE(this, frame); |
| 184 | link_ = frame; |
| 185 | } |
| 186 | |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 187 | int32_t GetVReg(size_t i) const { |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 188 | DCHECK_LT(i, NumberOfVRegs()); |
| 189 | const uint32_t* vreg = &vregs_[i]; |
| 190 | return *reinterpret_cast<const int32_t*>(vreg); |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | float GetVRegFloat(size_t i) const { |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 194 | DCHECK_LT(i, NumberOfVRegs()); |
| 195 | // NOTE: Strict-aliasing? |
| 196 | const uint32_t* vreg = &vregs_[i]; |
| 197 | return *reinterpret_cast<const float*>(vreg); |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | int64_t GetVRegLong(size_t i) const { |
Sebastien Hertz | 807a256 | 2013-04-15 09:33:39 +0200 | [diff] [blame] | 201 | DCHECK_LT(i, NumberOfVRegs()); |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 202 | const uint32_t* vreg = &vregs_[i]; |
Jeff Hao | e47637c | 2013-09-19 15:13:16 -0700 | [diff] [blame] | 203 | // Alignment attribute required for GCC 4.8 |
| 204 | typedef const int64_t unaligned_int64 __attribute__ ((aligned (4))); |
| 205 | return *reinterpret_cast<unaligned_int64*>(vreg); |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | double GetVRegDouble(size_t i) const { |
Sebastien Hertz | 807a256 | 2013-04-15 09:33:39 +0200 | [diff] [blame] | 209 | DCHECK_LT(i, NumberOfVRegs()); |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 210 | const uint32_t* vreg = &vregs_[i]; |
Jeff Hao | e47637c | 2013-09-19 15:13:16 -0700 | [diff] [blame] | 211 | // Alignment attribute required for GCC 4.8 |
| 212 | typedef const double unaligned_double __attribute__ ((aligned (4))); |
| 213 | return *reinterpret_cast<unaligned_double*>(vreg); |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 214 | } |
| 215 | |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 216 | template <bool kChecked = false> |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 217 | mirror::Object* GetVRegReference(size_t i) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 218 | DCHECK_LT(i, NumberOfVRegs()); |
| 219 | if (HasReferenceArray()) { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 220 | mirror::Object* ref = References()[i].AsMirrorPtr(); |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 221 | if (kChecked) { |
| 222 | CHECK(VerifyReference(ref)) << "VReg " << i << "(" << ref |
| 223 | << ") is in protected space, reference array " << true; |
| 224 | } |
Mathieu Chartier | 423d2a3 | 2013-09-12 17:33:56 -0700 | [diff] [blame] | 225 | return ref; |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 226 | } else { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 227 | const uint32_t* vreg_ptr = &vregs_[i]; |
| 228 | mirror::Object* ref = |
| 229 | reinterpret_cast<const StackReference<mirror::Object>*>(vreg_ptr)->AsMirrorPtr(); |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 230 | if (kChecked) { |
| 231 | CHECK(VerifyReference(ref)) << "VReg " << i |
| 232 | << "(" << ref << ") is in protected space, reference array " << false; |
| 233 | } |
| 234 | return ref; |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 235 | } |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 236 | } |
| 237 | |
Jeff Hao | 1674363 | 2013-05-08 10:59:04 -0700 | [diff] [blame] | 238 | // Get view of vregs as range of consecutive arguments starting at i. |
| 239 | uint32_t* GetVRegArgs(size_t i) { |
| 240 | return &vregs_[i]; |
| 241 | } |
| 242 | |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 243 | void SetVReg(size_t i, int32_t val) { |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 244 | DCHECK_LT(i, NumberOfVRegs()); |
| 245 | uint32_t* vreg = &vregs_[i]; |
| 246 | *reinterpret_cast<int32_t*>(vreg) = val; |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 247 | // This is needed for moving collectors since these can update the vreg references if they |
| 248 | // happen to agree with references in the reference array. |
| 249 | if (kMovingCollector && HasReferenceArray()) { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 250 | References()[i].Clear(); |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 251 | } |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | void SetVRegFloat(size_t i, float val) { |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 255 | DCHECK_LT(i, NumberOfVRegs()); |
| 256 | uint32_t* vreg = &vregs_[i]; |
| 257 | *reinterpret_cast<float*>(vreg) = val; |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 258 | // This is needed for moving collectors since these can update the vreg references if they |
| 259 | // happen to agree with references in the reference array. |
| 260 | if (kMovingCollector && HasReferenceArray()) { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 261 | References()[i].Clear(); |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 262 | } |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | void SetVRegLong(size_t i, int64_t val) { |
Sebastien Hertz | 807a256 | 2013-04-15 09:33:39 +0200 | [diff] [blame] | 266 | DCHECK_LT(i, NumberOfVRegs()); |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 267 | uint32_t* vreg = &vregs_[i]; |
Jeff Hao | e47637c | 2013-09-19 15:13:16 -0700 | [diff] [blame] | 268 | // Alignment attribute required for GCC 4.8 |
| 269 | typedef int64_t unaligned_int64 __attribute__ ((aligned (4))); |
| 270 | *reinterpret_cast<unaligned_int64*>(vreg) = val; |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 271 | // This is needed for moving collectors since these can update the vreg references if they |
| 272 | // happen to agree with references in the reference array. |
| 273 | if (kMovingCollector && HasReferenceArray()) { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 274 | References()[i].Clear(); |
| 275 | References()[i + 1].Clear(); |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 276 | } |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | void SetVRegDouble(size_t i, double val) { |
Sebastien Hertz | 807a256 | 2013-04-15 09:33:39 +0200 | [diff] [blame] | 280 | DCHECK_LT(i, NumberOfVRegs()); |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 281 | uint32_t* vreg = &vregs_[i]; |
Jeff Hao | e47637c | 2013-09-19 15:13:16 -0700 | [diff] [blame] | 282 | // Alignment attribute required for GCC 4.8 |
| 283 | typedef double unaligned_double __attribute__ ((aligned (4))); |
| 284 | *reinterpret_cast<unaligned_double*>(vreg) = val; |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 285 | // This is needed for moving collectors since these can update the vreg references if they |
| 286 | // happen to agree with references in the reference array. |
| 287 | if (kMovingCollector && HasReferenceArray()) { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 288 | References()[i].Clear(); |
| 289 | References()[i + 1].Clear(); |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 290 | } |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 291 | } |
| 292 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 293 | void SetVRegReference(size_t i, mirror::Object* val) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 294 | DCHECK_LT(i, NumberOfVRegs()); |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 295 | DCHECK(!kMovingCollector || VerifyReference(val)) |
| 296 | << "VReg " << i << "(" << val << ") is in protected space"; |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 297 | uint32_t* vreg = &vregs_[i]; |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 298 | reinterpret_cast<StackReference<mirror::Object>*>(vreg)->Assign(val); |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 299 | if (HasReferenceArray()) { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 300 | References()[i].Assign(val); |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 301 | } |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 302 | } |
| 303 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 304 | mirror::ArtMethod* GetMethod() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 305 | DCHECK(method_ != nullptr); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 306 | return method_; |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 307 | } |
| 308 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 309 | mirror::Object* GetThisObject() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 310 | |
Jeff Hao | e701f48 | 2013-05-24 11:50:49 -0700 | [diff] [blame] | 311 | mirror::Object* GetThisObject(uint16_t num_ins) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 312 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 313 | ThrowLocation GetCurrentLocationForThrow() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 314 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 315 | void SetMethod(mirror::ArtMethod* method) { |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 316 | #if defined(ART_USE_PORTABLE_COMPILER) |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 317 | DCHECK(method != nullptr); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 318 | method_ = method; |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 319 | #else |
| 320 | UNUSED(method); |
| 321 | UNIMPLEMENTED(FATAL) << "Should only be called when portable is enabled"; |
| 322 | #endif |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 323 | } |
| 324 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 325 | bool Contains(StackReference<mirror::Object>* shadow_frame_entry_obj) const { |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 326 | if (HasReferenceArray()) { |
| 327 | return ((&References()[0] <= shadow_frame_entry_obj) && |
| 328 | (shadow_frame_entry_obj <= (&References()[NumberOfVRegs() - 1]))); |
| 329 | } else { |
| 330 | uint32_t* shadow_frame_entry = reinterpret_cast<uint32_t*>(shadow_frame_entry_obj); |
| 331 | return ((&vregs_[0] <= shadow_frame_entry) && |
| 332 | (shadow_frame_entry <= (&vregs_[NumberOfVRegs() - 1]))); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 333 | } |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 334 | } |
| 335 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 336 | static size_t LinkOffset() { |
| 337 | return OFFSETOF_MEMBER(ShadowFrame, link_); |
| 338 | } |
| 339 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 340 | static size_t MethodOffset() { |
| 341 | return OFFSETOF_MEMBER(ShadowFrame, method_); |
| 342 | } |
| 343 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 344 | static size_t DexPCOffset() { |
| 345 | return OFFSETOF_MEMBER(ShadowFrame, dex_pc_); |
| 346 | } |
| 347 | |
Ian Rogers | 5438ad8 | 2012-10-15 17:22:44 -0700 | [diff] [blame] | 348 | static size_t NumberOfVRegsOffset() { |
| 349 | return OFFSETOF_MEMBER(ShadowFrame, number_of_vregs_); |
| 350 | } |
| 351 | |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 352 | static size_t VRegsOffset() { |
| 353 | return OFFSETOF_MEMBER(ShadowFrame, vregs_); |
Ian Rogers | 5438ad8 | 2012-10-15 17:22:44 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 356 | private: |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 357 | ShadowFrame(uint32_t num_vregs, ShadowFrame* link, mirror::ArtMethod* method, |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 358 | uint32_t dex_pc, bool has_reference_array) |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 359 | : number_of_vregs_(num_vregs), link_(link), method_(method), dex_pc_(dex_pc) { |
| 360 | if (has_reference_array) { |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 361 | #if defined(ART_USE_PORTABLE_COMPILER) |
| 362 | CHECK_LT(num_vregs, static_cast<uint32_t>(kHasReferenceArray)); |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 363 | number_of_vregs_ |= kHasReferenceArray; |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 364 | #endif |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 365 | memset(vregs_, 0, num_vregs * (sizeof(uint32_t) + sizeof(StackReference<mirror::Object>))); |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 366 | } else { |
Jeff Hao | e701f48 | 2013-05-24 11:50:49 -0700 | [diff] [blame] | 367 | memset(vregs_, 0, num_vregs * sizeof(uint32_t)); |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 368 | } |
| 369 | } |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 370 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 371 | const StackReference<mirror::Object>* References() const { |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 372 | DCHECK(HasReferenceArray()); |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 373 | const uint32_t* vreg_end = &vregs_[NumberOfVRegs()]; |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 374 | return reinterpret_cast<const StackReference<mirror::Object>*>(vreg_end); |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 375 | } |
| 376 | |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 377 | bool VerifyReference(const mirror::Object* val) const; |
| 378 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 379 | StackReference<mirror::Object>* References() { |
| 380 | return const_cast<StackReference<mirror::Object>*>(const_cast<const ShadowFrame*>(this)->References()); |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 381 | } |
| 382 | |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 383 | #if defined(ART_USE_PORTABLE_COMPILER) |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 384 | enum ShadowFrameFlag { |
| 385 | kHasReferenceArray = 1ul << 31 |
| 386 | }; |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 387 | // TODO: make const in the portable case. |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 388 | uint32_t number_of_vregs_; |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 389 | #else |
| 390 | const uint32_t number_of_vregs_; |
| 391 | #endif |
Ian Rogers | 5438ad8 | 2012-10-15 17:22:44 -0700 | [diff] [blame] | 392 | // Link to previous shadow frame or NULL. |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 393 | ShadowFrame* link_; |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 394 | #if defined(ART_USE_PORTABLE_COMPILER) |
| 395 | // TODO: make const in the portable case. |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 396 | mirror::ArtMethod* method_; |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 397 | #else |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 398 | mirror::ArtMethod* const method_; |
Ian Rogers | 8a01a3a | 2013-05-06 13:25:44 -0700 | [diff] [blame] | 399 | #endif |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 400 | uint32_t dex_pc_; |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 401 | uint32_t vregs_[0]; |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 402 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 403 | DISALLOW_IMPLICIT_CONSTRUCTORS(ShadowFrame); |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 404 | }; |
| 405 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 406 | // The managed stack is used to record fragments of managed code stacks. Managed code stacks |
| 407 | // may either be shadow frames or lists of frames using fixed frame sizes. Transition records are |
| 408 | // necessary for transitions between code using different frame layouts and transitions into native |
| 409 | // code. |
Ian Rogers | df1ce91 | 2012-11-27 17:07:11 -0800 | [diff] [blame] | 410 | class PACKED(4) ManagedStack { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 411 | public: |
Ian Rogers | ca19066 | 2012-06-26 15:45:57 -0700 | [diff] [blame] | 412 | ManagedStack() |
| 413 | : 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] | 414 | |
| 415 | void PushManagedStackFragment(ManagedStack* fragment) { |
| 416 | // Copy this top fragment into given fragment. |
| 417 | memcpy(fragment, this, sizeof(ManagedStack)); |
| 418 | // Clear this fragment, which has become the top. |
| 419 | memset(this, 0, sizeof(ManagedStack)); |
| 420 | // Link our top fragment onto the given fragment. |
| 421 | link_ = fragment; |
| 422 | } |
| 423 | |
| 424 | void PopManagedStackFragment(const ManagedStack& fragment) { |
| 425 | DCHECK(&fragment == link_); |
| 426 | // Copy this given fragment back to the top. |
| 427 | memcpy(this, &fragment, sizeof(ManagedStack)); |
| 428 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 429 | |
| 430 | ManagedStack* GetLink() const { |
| 431 | return link_; |
| 432 | } |
| 433 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 434 | mirror::ArtMethod** GetTopQuickFrame() const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 435 | return top_quick_frame_; |
| 436 | } |
| 437 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 438 | void SetTopQuickFrame(mirror::ArtMethod** top) { |
Sebastien Hertz | a7b0c42 | 2013-04-05 16:19:39 +0200 | [diff] [blame] | 439 | DCHECK(top_shadow_frame_ == NULL); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 440 | top_quick_frame_ = top; |
| 441 | } |
| 442 | |
| 443 | uintptr_t GetTopQuickFramePc() const { |
| 444 | return top_quick_frame_pc_; |
| 445 | } |
| 446 | |
| 447 | void SetTopQuickFramePc(uintptr_t pc) { |
Sebastien Hertz | a7b0c42 | 2013-04-05 16:19:39 +0200 | [diff] [blame] | 448 | DCHECK(top_shadow_frame_ == NULL); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 449 | top_quick_frame_pc_ = pc; |
| 450 | } |
| 451 | |
| 452 | static size_t TopQuickFrameOffset() { |
| 453 | return OFFSETOF_MEMBER(ManagedStack, top_quick_frame_); |
| 454 | } |
| 455 | |
| 456 | static size_t TopQuickFramePcOffset() { |
| 457 | return OFFSETOF_MEMBER(ManagedStack, top_quick_frame_pc_); |
| 458 | } |
| 459 | |
| 460 | ShadowFrame* PushShadowFrame(ShadowFrame* new_top_frame) { |
Sebastien Hertz | a7b0c42 | 2013-04-05 16:19:39 +0200 | [diff] [blame] | 461 | DCHECK(top_quick_frame_ == NULL); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 462 | ShadowFrame* old_frame = top_shadow_frame_; |
| 463 | top_shadow_frame_ = new_top_frame; |
| 464 | new_top_frame->SetLink(old_frame); |
| 465 | return old_frame; |
| 466 | } |
| 467 | |
| 468 | ShadowFrame* PopShadowFrame() { |
Sebastien Hertz | a7b0c42 | 2013-04-05 16:19:39 +0200 | [diff] [blame] | 469 | DCHECK(top_quick_frame_ == NULL); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 470 | CHECK(top_shadow_frame_ != NULL); |
| 471 | ShadowFrame* frame = top_shadow_frame_; |
| 472 | top_shadow_frame_ = frame->GetLink(); |
| 473 | return frame; |
| 474 | } |
| 475 | |
| 476 | ShadowFrame* GetTopShadowFrame() const { |
| 477 | return top_shadow_frame_; |
| 478 | } |
| 479 | |
Jeff Hao | 11ffc2d | 2013-02-01 11:52:17 -0800 | [diff] [blame] | 480 | void SetTopShadowFrame(ShadowFrame* top) { |
Sebastien Hertz | a7b0c42 | 2013-04-05 16:19:39 +0200 | [diff] [blame] | 481 | DCHECK(top_quick_frame_ == NULL); |
Jeff Hao | 11ffc2d | 2013-02-01 11:52:17 -0800 | [diff] [blame] | 482 | top_shadow_frame_ = top; |
| 483 | } |
| 484 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 485 | static size_t TopShadowFrameOffset() { |
| 486 | return OFFSETOF_MEMBER(ManagedStack, top_shadow_frame_); |
| 487 | } |
| 488 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 489 | size_t NumJniShadowFrameReferences() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 490 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 491 | bool ShadowFramesContain(StackReference<mirror::Object>* shadow_frame_entry) const; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 492 | |
| 493 | private: |
| 494 | ManagedStack* link_; |
| 495 | ShadowFrame* top_shadow_frame_; |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 496 | mirror::ArtMethod** top_quick_frame_; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 497 | uintptr_t top_quick_frame_pc_; |
| 498 | }; |
| 499 | |
| 500 | class StackVisitor { |
| 501 | protected: |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 502 | StackVisitor(Thread* thread, Context* context) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 503 | |
| 504 | public: |
| 505 | virtual ~StackVisitor() {} |
| 506 | |
| 507 | // 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] | 508 | virtual bool VisitFrame() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) = 0; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 509 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 510 | void WalkStack(bool include_transitions = false) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 511 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 512 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 513 | mirror::ArtMethod* GetMethod() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 514 | if (cur_shadow_frame_ != nullptr) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 515 | return cur_shadow_frame_->GetMethod(); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 516 | } else if (cur_quick_frame_ != nullptr) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 517 | return *cur_quick_frame_; |
| 518 | } else { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 519 | return nullptr; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 520 | } |
| 521 | } |
| 522 | |
| 523 | bool IsShadowFrame() const { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 524 | return cur_shadow_frame_ != nullptr; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 525 | } |
| 526 | |
Ian Rogers | 0c7abda | 2012-09-19 13:33:42 -0700 | [diff] [blame] | 527 | uint32_t GetDexPc() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 528 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 529 | mirror::Object* GetThisObject() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 530 | |
Ian Rogers | 0c7abda | 2012-09-19 13:33:42 -0700 | [diff] [blame] | 531 | size_t GetNativePcOffset() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 532 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 533 | uintptr_t* CalleeSaveAddress(int num, size_t frame_size) const |
| 534 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 535 | // Callee saves are held at the top of the frame |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 536 | DCHECK(GetMethod() != nullptr); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 537 | byte* save_addr = |
| 538 | reinterpret_cast<byte*>(cur_quick_frame_) + frame_size - ((num + 1) * kPointerSize); |
| 539 | #if defined(__i386__) |
| 540 | save_addr -= kPointerSize; // account for return address |
| 541 | #endif |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 542 | return reinterpret_cast<uintptr_t*>(save_addr); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 543 | } |
| 544 | |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 545 | // 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] | 546 | size_t GetFrameHeight() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 547 | return GetNumFrames() - cur_depth_ - 1; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 548 | } |
| 549 | |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 550 | // Returns a frame ID for JDWP use, starting from 1. |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 551 | size_t GetFrameId() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 552 | return GetFrameHeight() + 1; |
| 553 | } |
| 554 | |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 555 | size_t GetNumFrames() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 556 | if (num_frames_ == 0) { |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 557 | num_frames_ = ComputeNumFrames(thread_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 558 | } |
| 559 | return num_frames_; |
| 560 | } |
| 561 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 562 | uint32_t GetVReg(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind) const |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 563 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 564 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 565 | void SetVReg(mirror::ArtMethod* m, uint16_t vreg, uint32_t new_value, VRegKind kind) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 566 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 567 | |
| 568 | uintptr_t GetGPR(uint32_t reg) const; |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 569 | void SetGPR(uint32_t reg, uintptr_t value); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 570 | |
Mathieu Chartier | 423d2a3 | 2013-09-12 17:33:56 -0700 | [diff] [blame] | 571 | // This is a fast-path for getting/setting values in a quick frame. |
| 572 | uint32_t* GetVRegAddr(mirror::ArtMethod** cur_quick_frame, const DexFile::CodeItem* code_item, |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 573 | uint32_t core_spills, uint32_t fp_spills, size_t frame_size, |
| 574 | uint16_t vreg) const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 575 | int offset = GetVRegOffset(code_item, core_spills, fp_spills, frame_size, vreg); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 576 | DCHECK_EQ(cur_quick_frame, GetCurrentQuickFrame()); |
| 577 | byte* vreg_addr = reinterpret_cast<byte*>(cur_quick_frame) + offset; |
Mathieu Chartier | 423d2a3 | 2013-09-12 17:33:56 -0700 | [diff] [blame] | 578 | return reinterpret_cast<uint32_t*>(vreg_addr); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 579 | } |
| 580 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 581 | uintptr_t GetReturnPc() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 582 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 583 | void SetReturnPc(uintptr_t new_ret_pc) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 584 | |
| 585 | /* |
| 586 | * Return sp-relative offset for a Dalvik virtual register, compiler |
| 587 | * spill or Method* in bytes using Method*. |
Razvan A Lupusoru | da7a69b | 2014-01-08 15:09:50 -0800 | [diff] [blame] | 588 | * Note that (reg >= 0) refers to a Dalvik register, (reg == -1) |
| 589 | * denotes an invalid Dalvik register, (reg == -2) denotes Method* |
| 590 | * and (reg <= -3) denotes a compiler temporary. A compiler temporary |
| 591 | * can be thought of as a virtual register that does not exist in the |
| 592 | * dex but holds intermediate values to help optimizations and code |
| 593 | * generation. A special compiler temporary is one whose location |
| 594 | * in frame is well known while non-special ones do not have a requirement |
| 595 | * on location in frame as long as code generator itself knows how |
| 596 | * to access them. |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 597 | * |
| 598 | * +------------------------+ |
| 599 | * | IN[ins-1] | {Note: resides in caller's frame} |
| 600 | * | . | |
| 601 | * | IN[0] | |
| 602 | * | caller's Method* | |
| 603 | * +========================+ {Note: start of callee's frame} |
| 604 | * | core callee-save spill | {variable sized} |
| 605 | * +------------------------+ |
| 606 | * | fp callee-save spill | |
| 607 | * +------------------------+ |
| 608 | * | filler word | {For compatibility, if V[locals-1] used as wide |
| 609 | * +------------------------+ |
| 610 | * | V[locals-1] | |
| 611 | * | V[locals-2] | |
| 612 | * | . | |
| 613 | * | . | ... (reg == 2) |
| 614 | * | V[1] | ... (reg == 1) |
| 615 | * | V[0] | ... (reg == 0) <---- "locals_start" |
| 616 | * +------------------------+ |
Razvan A Lupusoru | da7a69b | 2014-01-08 15:09:50 -0800 | [diff] [blame] | 617 | * | Compiler temp region | ... (reg <= -3) |
| 618 | * | | |
| 619 | * | | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 620 | * +------------------------+ |
| 621 | * | stack alignment padding| {0 to (kStackAlignWords-1) of padding} |
| 622 | * +------------------------+ |
| 623 | * | OUT[outs-1] | |
| 624 | * | OUT[outs-2] | |
| 625 | * | . | |
| 626 | * | OUT[0] | |
Razvan A Lupusoru | da7a69b | 2014-01-08 15:09:50 -0800 | [diff] [blame] | 627 | * | curMethod* | ... (reg == -2) <<== sp, 16-byte aligned |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 628 | * +========================+ |
| 629 | */ |
| 630 | static int GetVRegOffset(const DexFile::CodeItem* code_item, |
Ian Rogers | b23a772 | 2012-10-09 16:54:26 -0700 | [diff] [blame] | 631 | uint32_t core_spills, uint32_t fp_spills, |
| 632 | size_t frame_size, int reg) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 633 | DCHECK_EQ(frame_size & (kStackAlignment - 1), 0U); |
Razvan A Lupusoru | da7a69b | 2014-01-08 15:09:50 -0800 | [diff] [blame] | 634 | DCHECK_NE(reg, static_cast<int>(kVRegInvalid)); |
| 635 | |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 636 | int num_spills = __builtin_popcount(core_spills) + __builtin_popcount(fp_spills) + 1; // Filler. |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 637 | int num_ins = code_item->ins_size_; |
| 638 | int num_regs = code_item->registers_size_ - num_ins; |
| 639 | int locals_start = frame_size - ((num_spills + num_regs) * sizeof(uint32_t)); |
Razvan A Lupusoru | da7a69b | 2014-01-08 15:09:50 -0800 | [diff] [blame] | 640 | if (reg == static_cast<int>(kVRegMethodPtrBaseReg)) { |
| 641 | // The current method pointer corresponds to special location on stack. |
| 642 | return 0; |
| 643 | } else if (reg <= static_cast<int>(kVRegNonSpecialTempBaseReg)) { |
| 644 | /* |
| 645 | * Special temporaries may have custom locations and the logic above deals with that. |
| 646 | * However, non-special temporaries are placed relative to the locals. Since the |
| 647 | * virtual register numbers for temporaries "grow" in negative direction, reg number |
| 648 | * will always be <= to the temp base reg. Thus, the logic ensures that the first |
| 649 | * temp is at offset -4 bytes from locals, the second is at -8 bytes from locals, |
| 650 | * and so on. |
| 651 | */ |
| 652 | int relative_offset = (reg + std::abs(static_cast<int>(kVRegNonSpecialTempBaseReg)) - 1) * sizeof(uint32_t); |
| 653 | return locals_start + relative_offset; |
| 654 | } else if (reg < num_regs) { |
| 655 | return locals_start + (reg * sizeof(uint32_t)); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 656 | } else { |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 657 | return frame_size + ((reg - num_regs) * sizeof(uint32_t)) + sizeof(uint32_t); // Dalvik in. |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 658 | } |
| 659 | } |
| 660 | |
| 661 | uintptr_t GetCurrentQuickFramePc() const { |
| 662 | return cur_quick_frame_pc_; |
| 663 | } |
| 664 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 665 | mirror::ArtMethod** GetCurrentQuickFrame() const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 666 | return cur_quick_frame_; |
| 667 | } |
| 668 | |
| 669 | ShadowFrame* GetCurrentShadowFrame() const { |
| 670 | return cur_shadow_frame_; |
| 671 | } |
| 672 | |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 673 | StackIndirectReferenceTable* GetCurrentSirt() const { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 674 | mirror::ArtMethod** sp = GetCurrentQuickFrame(); |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 675 | ++sp; // Skip Method*; SIRT comes next; |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 676 | return reinterpret_cast<StackIndirectReferenceTable*>(sp); |
| 677 | } |
| 678 | |
Ian Rogers | 40e3bac | 2012-11-20 00:09:14 -0800 | [diff] [blame] | 679 | std::string DescribeLocation() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 680 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 681 | static size_t ComputeNumFrames(Thread* thread) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 682 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 683 | static void DescribeStack(Thread* thread) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 684 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 685 | private: |
Sebastien Hertz | 74e256b | 2013-10-04 10:40:37 +0200 | [diff] [blame] | 686 | instrumentation::InstrumentationStackFrame& GetInstrumentationStackFrame(uint32_t depth) const; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 687 | |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 688 | void SanityCheckFrame() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 689 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 690 | Thread* const thread_; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 691 | ShadowFrame* cur_shadow_frame_; |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 692 | mirror::ArtMethod** cur_quick_frame_; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 693 | uintptr_t cur_quick_frame_pc_; |
| 694 | // Lazily computed, number of frames in the stack. |
| 695 | size_t num_frames_; |
| 696 | // Depth of the frame we're currently at. |
| 697 | size_t cur_depth_; |
Brian Carlstrom | 0cd7ec2 | 2013-07-17 23:40:20 -0700 | [diff] [blame] | 698 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 699 | protected: |
| 700 | Context* const context_; |
| 701 | }; |
| 702 | |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 703 | } // namespace art |
| 704 | |
Brian Carlstrom | fc0e321 | 2013-07-17 14:40:12 -0700 | [diff] [blame] | 705 | #endif // ART_RUNTIME_STACK_H_ |