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 | #include "stack.h" |
| 18 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 19 | #include "arch/context.h" |
Dave Allison | f943914 | 2014-03-27 15:10:22 -0700 | [diff] [blame] | 20 | #include "base/hex_dump.h" |
Ian Rogers | 6f3dbba | 2014-10-14 17:41:57 -0700 | [diff] [blame] | 21 | #include "entrypoints/runtime_asm_entrypoints.h" |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 22 | #include "mirror/art_method-inl.h" |
Ian Rogers | 4f6ad8a | 2013-03-18 15:27:28 -0700 | [diff] [blame] | 23 | #include "mirror/class-inl.h" |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 24 | #include "mirror/object.h" |
| 25 | #include "mirror/object-inl.h" |
| 26 | #include "mirror/object_array-inl.h" |
Vladimir Marko | 7624d25 | 2014-05-02 14:40:15 +0100 | [diff] [blame] | 27 | #include "quick/quick_method_frame_info.h" |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 28 | #include "runtime.h" |
Dave Allison | f943914 | 2014-03-27 15:10:22 -0700 | [diff] [blame] | 29 | #include "thread.h" |
Elliott Hughes | bfe487b | 2011-10-26 15:48:55 -0700 | [diff] [blame] | 30 | #include "thread_list.h" |
Mathieu Chartier | 4e30541 | 2014-02-19 10:54:44 -0800 | [diff] [blame] | 31 | #include "verify_object-inl.h" |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 32 | #include "vmap_table.h" |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 33 | |
Elliott Hughes | 11d1b0c | 2012-01-23 16:57:47 -0800 | [diff] [blame] | 34 | namespace art { |
| 35 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 36 | mirror::Object* ShadowFrame::GetThisObject() const { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 37 | mirror::ArtMethod* m = GetMethod(); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 38 | if (m->IsStatic()) { |
| 39 | return NULL; |
| 40 | } else if (m->IsNative()) { |
| 41 | return GetVRegReference(0); |
| 42 | } else { |
Mathieu Chartier | bfd9a43 | 2014-05-21 17:43:44 -0700 | [diff] [blame] | 43 | const DexFile::CodeItem* code_item = m->GetCodeItem(); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 44 | CHECK(code_item != NULL) << PrettyMethod(m); |
| 45 | uint16_t reg = code_item->registers_size_ - code_item->ins_size_; |
| 46 | return GetVRegReference(reg); |
| 47 | } |
| 48 | } |
| 49 | |
Jeff Hao | e701f48 | 2013-05-24 11:50:49 -0700 | [diff] [blame] | 50 | mirror::Object* ShadowFrame::GetThisObject(uint16_t num_ins) const { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 51 | mirror::ArtMethod* m = GetMethod(); |
Jeff Hao | e701f48 | 2013-05-24 11:50:49 -0700 | [diff] [blame] | 52 | if (m->IsStatic()) { |
| 53 | return NULL; |
| 54 | } else { |
Jeff Hao | 8d44885 | 2013-06-03 17:26:19 -0700 | [diff] [blame] | 55 | return GetVRegReference(NumberOfVRegs() - num_ins); |
Jeff Hao | e701f48 | 2013-05-24 11:50:49 -0700 | [diff] [blame] | 56 | } |
| 57 | } |
| 58 | |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 59 | size_t ManagedStack::NumJniShadowFrameReferences() const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 60 | size_t count = 0; |
| 61 | for (const ManagedStack* current_fragment = this; current_fragment != NULL; |
| 62 | current_fragment = current_fragment->GetLink()) { |
| 63 | for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_; current_frame != NULL; |
| 64 | current_frame = current_frame->GetLink()) { |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 65 | if (current_frame->GetMethod()->IsNative()) { |
| 66 | // The JNI ShadowFrame only contains references. (For indirect reference.) |
| 67 | count += current_frame->NumberOfVRegs(); |
| 68 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 69 | } |
| 70 | } |
| 71 | return count; |
| 72 | } |
| 73 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 74 | bool ManagedStack::ShadowFramesContain(StackReference<mirror::Object>* shadow_frame_entry) const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 75 | for (const ManagedStack* current_fragment = this; current_fragment != NULL; |
| 76 | current_fragment = current_fragment->GetLink()) { |
| 77 | for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_; current_frame != NULL; |
| 78 | current_frame = current_frame->GetLink()) { |
| 79 | if (current_frame->Contains(shadow_frame_entry)) { |
| 80 | return true; |
| 81 | } |
| 82 | } |
| 83 | } |
| 84 | return false; |
| 85 | } |
| 86 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 87 | StackVisitor::StackVisitor(Thread* thread, Context* context) |
| 88 | : thread_(thread), cur_shadow_frame_(NULL), |
| 89 | cur_quick_frame_(NULL), cur_quick_frame_pc_(0), num_frames_(0), cur_depth_(0), |
| 90 | context_(context) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 91 | DCHECK(thread == Thread::Current() || thread->IsSuspended()) << *thread; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 92 | } |
| 93 | |
Ian Rogers | 5cf9819 | 2014-05-29 21:31:50 -0700 | [diff] [blame] | 94 | StackVisitor::StackVisitor(Thread* thread, Context* context, size_t num_frames) |
| 95 | : thread_(thread), cur_shadow_frame_(NULL), |
| 96 | cur_quick_frame_(NULL), cur_quick_frame_pc_(0), num_frames_(num_frames), cur_depth_(0), |
| 97 | context_(context) { |
| 98 | DCHECK(thread == Thread::Current() || thread->IsSuspended()) << *thread; |
| 99 | } |
| 100 | |
Dave Allison | b373e09 | 2014-02-20 16:06:36 -0800 | [diff] [blame] | 101 | uint32_t StackVisitor::GetDexPc(bool abort_on_failure) const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 102 | if (cur_shadow_frame_ != NULL) { |
| 103 | return cur_shadow_frame_->GetDexPC(); |
| 104 | } else if (cur_quick_frame_ != NULL) { |
Dave Allison | b373e09 | 2014-02-20 16:06:36 -0800 | [diff] [blame] | 105 | return GetMethod()->ToDexPc(cur_quick_frame_pc_, abort_on_failure); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 106 | } else { |
| 107 | return 0; |
| 108 | } |
| 109 | } |
| 110 | |
Sebastien Hertz | a836bc9 | 2014-11-25 16:30:53 +0100 | [diff] [blame] | 111 | extern "C" mirror::Object* artQuickGetProxyThisObject(StackReference<mirror::ArtMethod>* sp) |
| 112 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 113 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 114 | mirror::Object* StackVisitor::GetThisObject() const { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 115 | mirror::ArtMethod* m = GetMethod(); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 116 | if (m->IsStatic()) { |
Nicolas Geoffray | 3946844 | 2014-09-02 15:17:15 +0100 | [diff] [blame] | 117 | return nullptr; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 118 | } else if (m->IsNative()) { |
Nicolas Geoffray | 3946844 | 2014-09-02 15:17:15 +0100 | [diff] [blame] | 119 | if (cur_quick_frame_ != nullptr) { |
Mathieu Chartier | eb8167a | 2014-05-07 15:43:14 -0700 | [diff] [blame] | 120 | HandleScope* hs = reinterpret_cast<HandleScope*>( |
Ian Rogers | 6f3dbba | 2014-10-14 17:41:57 -0700 | [diff] [blame] | 121 | reinterpret_cast<char*>(cur_quick_frame_) + m->GetHandleScopeOffset().SizeValue()); |
Mathieu Chartier | eb8167a | 2014-05-07 15:43:14 -0700 | [diff] [blame] | 122 | return hs->GetReference(0); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 123 | } else { |
| 124 | return cur_shadow_frame_->GetVRegReference(0); |
| 125 | } |
Sebastien Hertz | a836bc9 | 2014-11-25 16:30:53 +0100 | [diff] [blame] | 126 | } else if (m->IsProxyMethod()) { |
| 127 | if (cur_quick_frame_ != nullptr) { |
| 128 | return artQuickGetProxyThisObject(cur_quick_frame_); |
| 129 | } else { |
| 130 | return cur_shadow_frame_->GetVRegReference(0); |
| 131 | } |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 132 | } else { |
Mathieu Chartier | bfd9a43 | 2014-05-21 17:43:44 -0700 | [diff] [blame] | 133 | const DexFile::CodeItem* code_item = m->GetCodeItem(); |
Nicolas Geoffray | 3946844 | 2014-09-02 15:17:15 +0100 | [diff] [blame] | 134 | if (code_item == nullptr) { |
Ian Rogers | e0dcd46 | 2014-03-08 15:21:04 -0800 | [diff] [blame] | 135 | UNIMPLEMENTED(ERROR) << "Failed to determine this object of abstract or proxy method: " |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 136 | << PrettyMethod(m); |
Ian Rogers | e0dcd46 | 2014-03-08 15:21:04 -0800 | [diff] [blame] | 137 | return nullptr; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 138 | } else { |
| 139 | uint16_t reg = code_item->registers_size_ - code_item->ins_size_; |
Nicolas Geoffray | 15b9d52 | 2015-03-12 15:05:13 +0000 | [diff] [blame^] | 140 | uint32_t value = 0; |
| 141 | bool success = GetVReg(m, reg, kReferenceVReg, &value); |
| 142 | // We currently always guarantee the `this` object is live throughout the method. |
| 143 | CHECK(success) << "Failed to read the this object in " << PrettyMethod(m); |
| 144 | return reinterpret_cast<mirror::Object*>(value); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 145 | } |
| 146 | } |
| 147 | } |
| 148 | |
Ian Rogers | 0c7abda | 2012-09-19 13:33:42 -0700 | [diff] [blame] | 149 | size_t StackVisitor::GetNativePcOffset() const { |
| 150 | DCHECK(!IsShadowFrame()); |
Ian Rogers | 6f3dbba | 2014-10-14 17:41:57 -0700 | [diff] [blame] | 151 | return GetMethod()->NativeQuickPcOffset(cur_quick_frame_pc_); |
Ian Rogers | 0c7abda | 2012-09-19 13:33:42 -0700 | [diff] [blame] | 152 | } |
| 153 | |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame] | 154 | bool StackVisitor::GetVReg(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind, |
| 155 | uint32_t* val) const { |
Sebastien Hertz | c901dd7 | 2014-07-16 11:56:07 +0200 | [diff] [blame] | 156 | if (cur_quick_frame_ != nullptr) { |
| 157 | DCHECK(context_ != nullptr); // You can't reliably read registers without a context. |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 158 | DCHECK(m == GetMethod()); |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 159 | if (m->IsOptimized(sizeof(void*))) { |
| 160 | return GetVRegFromOptimizedCode(m, vreg, kind, val); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 161 | } else { |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 162 | return GetVRegFromQuickCode(m, vreg, kind, val); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 163 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 164 | } else { |
Sebastien Hertz | 96ba8dc | 2015-01-22 18:57:14 +0100 | [diff] [blame] | 165 | DCHECK(cur_shadow_frame_ != nullptr); |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame] | 166 | *val = cur_shadow_frame_->GetVReg(vreg); |
| 167 | return true; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 168 | } |
| 169 | } |
| 170 | |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 171 | bool StackVisitor::GetVRegFromQuickCode(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind, |
| 172 | uint32_t* val) const { |
| 173 | const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*)); |
| 174 | DCHECK(code_pointer != nullptr); |
| 175 | const VmapTable vmap_table(m->GetVmapTable(code_pointer, sizeof(void*))); |
| 176 | QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer); |
| 177 | uint32_t vmap_offset; |
| 178 | // TODO: IsInContext stops before spotting floating point registers. |
| 179 | if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) { |
| 180 | bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
| 181 | uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask(); |
| 182 | uint32_t reg = vmap_table.ComputeRegister(spill_mask, vmap_offset, kind); |
| 183 | return GetRegisterIfAccessible(reg, kind, val); |
| 184 | } else { |
| 185 | const DexFile::CodeItem* code_item = m->GetCodeItem(); |
| 186 | DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile |
| 187 | // its instructions? |
Nicolas Geoffray | 15b9d52 | 2015-03-12 15:05:13 +0000 | [diff] [blame^] | 188 | *val = *GetVRegAddrFromQuickCode(cur_quick_frame_, code_item, frame_info.CoreSpillMask(), |
| 189 | frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg); |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 190 | return true; |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | bool StackVisitor::GetVRegFromOptimizedCode(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind, |
| 195 | uint32_t* val) const { |
| 196 | const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*)); |
| 197 | DCHECK(code_pointer != nullptr); |
| 198 | uint32_t native_pc_offset = m->NativeQuickPcOffset(cur_quick_frame_pc_); |
| 199 | CodeInfo code_info = m->GetOptimizedCodeInfo(); |
| 200 | StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset); |
| 201 | const DexFile::CodeItem* code_item = m->GetCodeItem(); |
| 202 | DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile |
| 203 | // its instructions? |
| 204 | DCHECK_LT(vreg, code_item->registers_size_); |
Roland Levillain | a2d8ec6 | 2015-03-12 15:25:29 +0000 | [diff] [blame] | 205 | DexRegisterMap dex_register_map = |
| 206 | code_info.GetDexRegisterMapOf(stack_map, code_item->registers_size_); |
| 207 | DexRegisterLocation::Kind location_kind = dex_register_map.GetLocationKind(vreg); |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 208 | switch (location_kind) { |
Roland Levillain | a2d8ec6 | 2015-03-12 15:25:29 +0000 | [diff] [blame] | 209 | case DexRegisterLocation::Kind::kInStack: { |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 210 | const int32_t offset = dex_register_map.GetStackOffsetInBytes(vreg); |
| 211 | const uint8_t* addr = reinterpret_cast<const uint8_t*>(cur_quick_frame_) + offset; |
| 212 | *val = *reinterpret_cast<const uint32_t*>(addr); |
| 213 | return true; |
| 214 | } |
Roland Levillain | a2d8ec6 | 2015-03-12 15:25:29 +0000 | [diff] [blame] | 215 | case DexRegisterLocation::Kind::kInRegister: |
| 216 | case DexRegisterLocation::Kind::kInFpuRegister: { |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 217 | uint32_t reg = dex_register_map.GetMachineRegister(vreg); |
| 218 | return GetRegisterIfAccessible(reg, kind, val); |
| 219 | } |
Roland Levillain | a2d8ec6 | 2015-03-12 15:25:29 +0000 | [diff] [blame] | 220 | case DexRegisterLocation::Kind::kConstant: |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 221 | *val = dex_register_map.GetConstant(vreg); |
| 222 | return true; |
Roland Levillain | a2d8ec6 | 2015-03-12 15:25:29 +0000 | [diff] [blame] | 223 | case DexRegisterLocation::Kind::kNone: |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 224 | return false; |
Roland Levillain | a2d8ec6 | 2015-03-12 15:25:29 +0000 | [diff] [blame] | 225 | default: |
| 226 | LOG(FATAL) |
| 227 | << "Unexpected location kind" |
| 228 | << DexRegisterLocation::PrettyDescriptor(dex_register_map.GetLocationInternalKind(vreg)); |
| 229 | UNREACHABLE(); |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 230 | } |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | bool StackVisitor::GetRegisterIfAccessible(uint32_t reg, VRegKind kind, uint32_t* val) const { |
| 234 | const bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
| 235 | if (!IsAccessibleRegister(reg, is_float)) { |
| 236 | return false; |
| 237 | } |
| 238 | uintptr_t ptr_val = GetRegister(reg, is_float); |
| 239 | const bool target64 = Is64BitInstructionSet(kRuntimeISA); |
| 240 | if (target64) { |
| 241 | const bool wide_lo = (kind == kLongLoVReg) || (kind == kDoubleLoVReg); |
| 242 | const bool wide_hi = (kind == kLongHiVReg) || (kind == kDoubleHiVReg); |
| 243 | int64_t value_long = static_cast<int64_t>(ptr_val); |
| 244 | if (wide_lo) { |
| 245 | ptr_val = static_cast<uintptr_t>(Low32Bits(value_long)); |
| 246 | } else if (wide_hi) { |
| 247 | ptr_val = static_cast<uintptr_t>(High32Bits(value_long)); |
| 248 | } |
| 249 | } |
| 250 | *val = ptr_val; |
| 251 | return true; |
| 252 | } |
| 253 | |
Sebastien Hertz | c901dd7 | 2014-07-16 11:56:07 +0200 | [diff] [blame] | 254 | bool StackVisitor::GetVRegPair(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind_lo, |
| 255 | VRegKind kind_hi, uint64_t* val) const { |
| 256 | if (kind_lo == kLongLoVReg) { |
| 257 | DCHECK_EQ(kind_hi, kLongHiVReg); |
| 258 | } else if (kind_lo == kDoubleLoVReg) { |
| 259 | DCHECK_EQ(kind_hi, kDoubleHiVReg); |
| 260 | } else { |
| 261 | LOG(FATAL) << "Expected long or double: kind_lo=" << kind_lo << ", kind_hi=" << kind_hi; |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 262 | UNREACHABLE(); |
Sebastien Hertz | c901dd7 | 2014-07-16 11:56:07 +0200 | [diff] [blame] | 263 | } |
| 264 | if (cur_quick_frame_ != nullptr) { |
| 265 | DCHECK(context_ != nullptr); // You can't reliably read registers without a context. |
| 266 | DCHECK(m == GetMethod()); |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 267 | if (m->IsOptimized(sizeof(void*))) { |
| 268 | return GetVRegPairFromOptimizedCode(m, vreg, kind_lo, kind_hi, val); |
Sebastien Hertz | c901dd7 | 2014-07-16 11:56:07 +0200 | [diff] [blame] | 269 | } else { |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 270 | return GetVRegPairFromQuickCode(m, vreg, kind_lo, kind_hi, val); |
Sebastien Hertz | c901dd7 | 2014-07-16 11:56:07 +0200 | [diff] [blame] | 271 | } |
| 272 | } else { |
Sebastien Hertz | 96ba8dc | 2015-01-22 18:57:14 +0100 | [diff] [blame] | 273 | DCHECK(cur_shadow_frame_ != nullptr); |
Sebastien Hertz | c901dd7 | 2014-07-16 11:56:07 +0200 | [diff] [blame] | 274 | *val = cur_shadow_frame_->GetVRegLong(vreg); |
| 275 | return true; |
| 276 | } |
| 277 | } |
| 278 | |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 279 | bool StackVisitor::GetVRegPairFromQuickCode(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind_lo, |
| 280 | VRegKind kind_hi, uint64_t* val) const { |
| 281 | const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*)); |
| 282 | DCHECK(code_pointer != nullptr); |
| 283 | const VmapTable vmap_table(m->GetVmapTable(code_pointer, sizeof(void*))); |
| 284 | QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer); |
| 285 | uint32_t vmap_offset_lo, vmap_offset_hi; |
| 286 | // TODO: IsInContext stops before spotting floating point registers. |
| 287 | if (vmap_table.IsInContext(vreg, kind_lo, &vmap_offset_lo) && |
| 288 | vmap_table.IsInContext(vreg + 1, kind_hi, &vmap_offset_hi)) { |
| 289 | bool is_float = (kind_lo == kDoubleLoVReg); |
| 290 | uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask(); |
| 291 | uint32_t reg_lo = vmap_table.ComputeRegister(spill_mask, vmap_offset_lo, kind_lo); |
| 292 | uint32_t reg_hi = vmap_table.ComputeRegister(spill_mask, vmap_offset_hi, kind_hi); |
| 293 | return GetRegisterPairIfAccessible(reg_lo, reg_hi, kind_lo, val); |
| 294 | } else { |
| 295 | const DexFile::CodeItem* code_item = m->GetCodeItem(); |
| 296 | DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile |
| 297 | // its instructions? |
Nicolas Geoffray | 15b9d52 | 2015-03-12 15:05:13 +0000 | [diff] [blame^] | 298 | uint32_t* addr = GetVRegAddrFromQuickCode( |
| 299 | cur_quick_frame_, code_item, frame_info.CoreSpillMask(), |
| 300 | frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg); |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 301 | *val = *reinterpret_cast<uint64_t*>(addr); |
| 302 | return true; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | bool StackVisitor::GetVRegPairFromOptimizedCode(mirror::ArtMethod* m, uint16_t vreg, |
| 307 | VRegKind kind_lo, VRegKind kind_hi, |
| 308 | uint64_t* val) const { |
| 309 | uint32_t low_32bits; |
| 310 | uint32_t high_32bits; |
| 311 | bool success = GetVRegFromOptimizedCode(m, vreg, kind_lo, &low_32bits); |
| 312 | success &= GetVRegFromOptimizedCode(m, vreg + 1, kind_hi, &high_32bits); |
| 313 | if (success) { |
| 314 | *val = (static_cast<uint64_t>(high_32bits) << 32) | static_cast<uint64_t>(low_32bits); |
| 315 | } |
| 316 | return success; |
| 317 | } |
| 318 | |
| 319 | bool StackVisitor::GetRegisterPairIfAccessible(uint32_t reg_lo, uint32_t reg_hi, |
| 320 | VRegKind kind_lo, uint64_t* val) const { |
| 321 | const bool is_float = (kind_lo == kDoubleLoVReg); |
| 322 | if (!IsAccessibleRegister(reg_lo, is_float) || !IsAccessibleRegister(reg_hi, is_float)) { |
| 323 | return false; |
| 324 | } |
| 325 | uintptr_t ptr_val_lo = GetRegister(reg_lo, is_float); |
| 326 | uintptr_t ptr_val_hi = GetRegister(reg_hi, is_float); |
| 327 | bool target64 = Is64BitInstructionSet(kRuntimeISA); |
| 328 | if (target64) { |
| 329 | int64_t value_long_lo = static_cast<int64_t>(ptr_val_lo); |
| 330 | int64_t value_long_hi = static_cast<int64_t>(ptr_val_hi); |
| 331 | ptr_val_lo = static_cast<uintptr_t>(Low32Bits(value_long_lo)); |
| 332 | ptr_val_hi = static_cast<uintptr_t>(High32Bits(value_long_hi)); |
| 333 | } |
| 334 | *val = (static_cast<uint64_t>(ptr_val_hi) << 32) | static_cast<uint32_t>(ptr_val_lo); |
| 335 | return true; |
| 336 | } |
| 337 | |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame] | 338 | bool StackVisitor::SetVReg(mirror::ArtMethod* m, uint16_t vreg, uint32_t new_value, |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 339 | VRegKind kind) { |
Sebastien Hertz | c901dd7 | 2014-07-16 11:56:07 +0200 | [diff] [blame] | 340 | if (cur_quick_frame_ != nullptr) { |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 341 | DCHECK(context_ != nullptr); // You can't reliably write registers without a context. |
| 342 | DCHECK(m == GetMethod()); |
| 343 | if (m->IsOptimized(sizeof(void*))) { |
| 344 | return SetVRegFromOptimizedCode(m, vreg, new_value, kind); |
| 345 | } else { |
| 346 | return SetVRegFromQuickCode(m, vreg, new_value, kind); |
Sebastien Hertz | 96ba8dc | 2015-01-22 18:57:14 +0100 | [diff] [blame] | 347 | } |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 348 | } else { |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 349 | cur_shadow_frame_->SetVReg(vreg, new_value); |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame] | 350 | return true; |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 351 | } |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 352 | } |
| 353 | |
| 354 | bool StackVisitor::SetVRegFromQuickCode(mirror::ArtMethod* m, uint16_t vreg, uint32_t new_value, |
| 355 | VRegKind kind) { |
| 356 | DCHECK(context_ != nullptr); // You can't reliably write registers without a context. |
| 357 | DCHECK(m == GetMethod()); |
| 358 | const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*)); |
| 359 | DCHECK(code_pointer != nullptr); |
| 360 | const VmapTable vmap_table(m->GetVmapTable(code_pointer, sizeof(void*))); |
| 361 | QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer); |
| 362 | uint32_t vmap_offset; |
| 363 | // TODO: IsInContext stops before spotting floating point registers. |
| 364 | if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) { |
| 365 | bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
| 366 | uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask(); |
| 367 | uint32_t reg = vmap_table.ComputeRegister(spill_mask, vmap_offset, kind); |
| 368 | return SetRegisterIfAccessible(reg, new_value, kind); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 369 | } else { |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 370 | const DexFile::CodeItem* code_item = m->GetCodeItem(); |
| 371 | DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile |
| 372 | // its instructions? |
Nicolas Geoffray | 15b9d52 | 2015-03-12 15:05:13 +0000 | [diff] [blame^] | 373 | uint32_t* addr = GetVRegAddrFromQuickCode( |
| 374 | cur_quick_frame_, code_item, frame_info.CoreSpillMask(), |
| 375 | frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg); |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 376 | *addr = new_value; |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame] | 377 | return true; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 378 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 379 | } |
| 380 | |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 381 | bool StackVisitor::SetVRegFromOptimizedCode(mirror::ArtMethod* m, uint16_t vreg, uint32_t new_value, |
| 382 | VRegKind kind) { |
| 383 | const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*)); |
| 384 | DCHECK(code_pointer != nullptr); |
| 385 | uint32_t native_pc_offset = m->NativeQuickPcOffset(cur_quick_frame_pc_); |
| 386 | CodeInfo code_info = m->GetOptimizedCodeInfo(); |
| 387 | StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset); |
| 388 | const DexFile::CodeItem* code_item = m->GetCodeItem(); |
| 389 | DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile |
| 390 | // its instructions? |
| 391 | DCHECK_LT(vreg, code_item->registers_size_); |
Roland Levillain | a2d8ec6 | 2015-03-12 15:25:29 +0000 | [diff] [blame] | 392 | DexRegisterMap dex_register_map = |
| 393 | code_info.GetDexRegisterMapOf(stack_map, code_item->registers_size_); |
| 394 | DexRegisterLocation::Kind location_kind = dex_register_map.GetLocationKind(vreg); |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 395 | uint32_t dex_pc = m->ToDexPc(cur_quick_frame_pc_, false); |
| 396 | switch (location_kind) { |
Roland Levillain | a2d8ec6 | 2015-03-12 15:25:29 +0000 | [diff] [blame] | 397 | case DexRegisterLocation::Kind::kInStack: { |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 398 | const int32_t offset = dex_register_map.GetStackOffsetInBytes(vreg); |
| 399 | uint8_t* addr = reinterpret_cast<uint8_t*>(cur_quick_frame_) + offset; |
| 400 | *reinterpret_cast<uint32_t*>(addr) = new_value; |
| 401 | return true; |
| 402 | } |
Roland Levillain | a2d8ec6 | 2015-03-12 15:25:29 +0000 | [diff] [blame] | 403 | case DexRegisterLocation::Kind::kInRegister: |
| 404 | case DexRegisterLocation::Kind::kInFpuRegister: { |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 405 | uint32_t reg = dex_register_map.GetMachineRegister(vreg); |
| 406 | return SetRegisterIfAccessible(reg, new_value, kind); |
| 407 | } |
Roland Levillain | a2d8ec6 | 2015-03-12 15:25:29 +0000 | [diff] [blame] | 408 | case DexRegisterLocation::Kind::kConstant: |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 409 | LOG(ERROR) << StringPrintf("Cannot change value of DEX register v%u used as a constant at " |
| 410 | "DEX pc 0x%x (native pc 0x%x) of method %s", |
| 411 | vreg, dex_pc, native_pc_offset, |
| 412 | PrettyMethod(cur_quick_frame_->AsMirrorPtr()).c_str()); |
| 413 | return false; |
Roland Levillain | a2d8ec6 | 2015-03-12 15:25:29 +0000 | [diff] [blame] | 414 | case DexRegisterLocation::Kind::kNone: |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 415 | LOG(ERROR) << StringPrintf("No location for DEX register v%u at DEX pc 0x%x " |
| 416 | "(native pc 0x%x) of method %s", |
| 417 | vreg, dex_pc, native_pc_offset, |
| 418 | PrettyMethod(cur_quick_frame_->AsMirrorPtr()).c_str()); |
| 419 | return false; |
| 420 | default: |
| 421 | LOG(FATAL) << StringPrintf("Unknown location for DEX register v%u at DEX pc 0x%x " |
| 422 | "(native pc 0x%x) of method %s", |
| 423 | vreg, dex_pc, native_pc_offset, |
| 424 | PrettyMethod(cur_quick_frame_->AsMirrorPtr()).c_str()); |
| 425 | UNREACHABLE(); |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | bool StackVisitor::SetRegisterIfAccessible(uint32_t reg, uint32_t new_value, VRegKind kind) { |
| 430 | const bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
| 431 | if (!IsAccessibleRegister(reg, is_float)) { |
| 432 | return false; |
| 433 | } |
| 434 | const bool target64 = Is64BitInstructionSet(kRuntimeISA); |
| 435 | |
| 436 | // Create a new value that can hold both low 32 and high 32 bits, in |
| 437 | // case we are running 64 bits. |
| 438 | uintptr_t full_new_value = new_value; |
| 439 | // Deal with 32 or 64-bit wide registers in a way that builds on all targets. |
| 440 | if (target64) { |
| 441 | bool wide_lo = (kind == kLongLoVReg) || (kind == kDoubleLoVReg); |
| 442 | bool wide_hi = (kind == kLongHiVReg) || (kind == kDoubleHiVReg); |
| 443 | if (wide_lo || wide_hi) { |
| 444 | uintptr_t old_reg_val = GetRegister(reg, is_float); |
| 445 | uint64_t new_vreg_portion = static_cast<uint64_t>(new_value); |
| 446 | uint64_t old_reg_val_as_wide = static_cast<uint64_t>(old_reg_val); |
| 447 | uint64_t mask = 0xffffffff; |
| 448 | if (wide_lo) { |
| 449 | mask = mask << 32; |
| 450 | } else { |
| 451 | new_vreg_portion = new_vreg_portion << 32; |
| 452 | } |
| 453 | full_new_value = static_cast<uintptr_t>((old_reg_val_as_wide & mask) | new_vreg_portion); |
| 454 | } |
| 455 | } |
| 456 | SetRegister(reg, full_new_value, is_float); |
| 457 | return true; |
| 458 | } |
| 459 | |
Sebastien Hertz | c901dd7 | 2014-07-16 11:56:07 +0200 | [diff] [blame] | 460 | bool StackVisitor::SetVRegPair(mirror::ArtMethod* m, uint16_t vreg, uint64_t new_value, |
| 461 | VRegKind kind_lo, VRegKind kind_hi) { |
| 462 | if (kind_lo == kLongLoVReg) { |
| 463 | DCHECK_EQ(kind_hi, kLongHiVReg); |
| 464 | } else if (kind_lo == kDoubleLoVReg) { |
| 465 | DCHECK_EQ(kind_hi, kDoubleHiVReg); |
| 466 | } else { |
| 467 | LOG(FATAL) << "Expected long or double: kind_lo=" << kind_lo << ", kind_hi=" << kind_hi; |
| 468 | } |
| 469 | if (cur_quick_frame_ != nullptr) { |
| 470 | DCHECK(context_ != nullptr); // You can't reliably write registers without a context. |
| 471 | DCHECK(m == GetMethod()); |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 472 | if (m->IsOptimized(sizeof(void*))) { |
| 473 | return SetVRegPairFromOptimizedCode(m, vreg, new_value, kind_lo, kind_hi); |
Sebastien Hertz | c901dd7 | 2014-07-16 11:56:07 +0200 | [diff] [blame] | 474 | } else { |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 475 | return SetVRegPairFromQuickCode(m, vreg, new_value, kind_lo, kind_hi); |
Sebastien Hertz | c901dd7 | 2014-07-16 11:56:07 +0200 | [diff] [blame] | 476 | } |
| 477 | } else { |
Sebastien Hertz | 96ba8dc | 2015-01-22 18:57:14 +0100 | [diff] [blame] | 478 | DCHECK(cur_shadow_frame_ != nullptr); |
Sebastien Hertz | c901dd7 | 2014-07-16 11:56:07 +0200 | [diff] [blame] | 479 | cur_shadow_frame_->SetVRegLong(vreg, new_value); |
| 480 | return true; |
| 481 | } |
| 482 | } |
| 483 | |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 484 | bool StackVisitor::SetVRegPairFromQuickCode(mirror::ArtMethod* m, uint16_t vreg, uint64_t new_value, |
| 485 | VRegKind kind_lo, VRegKind kind_hi) { |
| 486 | const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*)); |
| 487 | DCHECK(code_pointer != nullptr); |
| 488 | const VmapTable vmap_table(m->GetVmapTable(code_pointer, sizeof(void*))); |
| 489 | QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer); |
| 490 | uint32_t vmap_offset_lo, vmap_offset_hi; |
| 491 | // TODO: IsInContext stops before spotting floating point registers. |
| 492 | if (vmap_table.IsInContext(vreg, kind_lo, &vmap_offset_lo) && |
| 493 | vmap_table.IsInContext(vreg + 1, kind_hi, &vmap_offset_hi)) { |
| 494 | bool is_float = (kind_lo == kDoubleLoVReg); |
| 495 | uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask(); |
| 496 | uint32_t reg_lo = vmap_table.ComputeRegister(spill_mask, vmap_offset_lo, kind_lo); |
| 497 | uint32_t reg_hi = vmap_table.ComputeRegister(spill_mask, vmap_offset_hi, kind_hi); |
| 498 | return SetRegisterPairIfAccessible(reg_lo, reg_hi, new_value, is_float); |
| 499 | } else { |
| 500 | const DexFile::CodeItem* code_item = m->GetCodeItem(); |
| 501 | DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile |
| 502 | // its instructions? |
Nicolas Geoffray | 15b9d52 | 2015-03-12 15:05:13 +0000 | [diff] [blame^] | 503 | uint32_t* addr = GetVRegAddrFromQuickCode( |
| 504 | cur_quick_frame_, code_item, frame_info.CoreSpillMask(), |
| 505 | frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg); |
Sebastien Hertz | 7cde48c | 2015-01-20 16:06:43 +0100 | [diff] [blame] | 506 | *reinterpret_cast<uint64_t*>(addr) = new_value; |
| 507 | return true; |
| 508 | } |
| 509 | } |
| 510 | |
| 511 | bool StackVisitor::SetVRegPairFromOptimizedCode(mirror::ArtMethod* m, uint16_t vreg, uint64_t new_value, |
| 512 | VRegKind kind_lo, VRegKind kind_hi) { |
| 513 | uint32_t low_32bits = Low32Bits(new_value); |
| 514 | uint32_t high_32bits = High32Bits(new_value); |
| 515 | bool success = SetVRegFromOptimizedCode(m, vreg, low_32bits, kind_lo); |
| 516 | success &= SetVRegFromOptimizedCode(m, vreg + 1, high_32bits, kind_hi); |
| 517 | return success; |
| 518 | } |
| 519 | |
| 520 | bool StackVisitor::SetRegisterPairIfAccessible(uint32_t reg_lo, uint32_t reg_hi, |
| 521 | uint64_t new_value, bool is_float) { |
| 522 | if (!IsAccessibleRegister(reg_lo, is_float) || !IsAccessibleRegister(reg_hi, is_float)) { |
| 523 | return false; |
| 524 | } |
| 525 | uintptr_t new_value_lo = static_cast<uintptr_t>(new_value & 0xFFFFFFFF); |
| 526 | uintptr_t new_value_hi = static_cast<uintptr_t>(new_value >> 32); |
| 527 | bool target64 = Is64BitInstructionSet(kRuntimeISA); |
| 528 | // Deal with 32 or 64-bit wide registers in a way that builds on all targets. |
| 529 | if (target64) { |
| 530 | DCHECK_EQ(reg_lo, reg_hi); |
| 531 | SetRegister(reg_lo, new_value, is_float); |
| 532 | } else { |
| 533 | SetRegister(reg_lo, new_value_lo, is_float); |
| 534 | SetRegister(reg_hi, new_value_hi, is_float); |
| 535 | } |
| 536 | return true; |
| 537 | } |
| 538 | |
Sebastien Hertz | 96ba8dc | 2015-01-22 18:57:14 +0100 | [diff] [blame] | 539 | bool StackVisitor::IsAccessibleGPR(uint32_t reg) const { |
| 540 | DCHECK(context_ != nullptr); |
| 541 | return context_->IsAccessibleGPR(reg); |
| 542 | } |
| 543 | |
Mathieu Chartier | 815873e | 2014-02-13 18:02:13 -0800 | [diff] [blame] | 544 | uintptr_t* StackVisitor::GetGPRAddress(uint32_t reg) const { |
Sebastien Hertz | 96ba8dc | 2015-01-22 18:57:14 +0100 | [diff] [blame] | 545 | DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine"; |
| 546 | DCHECK(context_ != nullptr); |
Mathieu Chartier | 815873e | 2014-02-13 18:02:13 -0800 | [diff] [blame] | 547 | return context_->GetGPRAddress(reg); |
| 548 | } |
| 549 | |
Sebastien Hertz | 96ba8dc | 2015-01-22 18:57:14 +0100 | [diff] [blame] | 550 | uintptr_t StackVisitor::GetGPR(uint32_t reg) const { |
| 551 | DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine"; |
| 552 | DCHECK(context_ != nullptr); |
| 553 | return context_->GetGPR(reg); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 554 | } |
| 555 | |
Sebastien Hertz | 96ba8dc | 2015-01-22 18:57:14 +0100 | [diff] [blame] | 556 | void StackVisitor::SetGPR(uint32_t reg, uintptr_t value) { |
| 557 | DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine"; |
| 558 | DCHECK(context_ != nullptr); |
| 559 | context_->SetGPR(reg, value); |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame] | 560 | } |
| 561 | |
Sebastien Hertz | 96ba8dc | 2015-01-22 18:57:14 +0100 | [diff] [blame] | 562 | bool StackVisitor::IsAccessibleFPR(uint32_t reg) const { |
| 563 | DCHECK(context_ != nullptr); |
| 564 | return context_->IsAccessibleFPR(reg); |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame] | 565 | } |
| 566 | |
Sebastien Hertz | 96ba8dc | 2015-01-22 18:57:14 +0100 | [diff] [blame] | 567 | uintptr_t StackVisitor::GetFPR(uint32_t reg) const { |
| 568 | DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine"; |
| 569 | DCHECK(context_ != nullptr); |
| 570 | return context_->GetFPR(reg); |
| 571 | } |
| 572 | |
| 573 | void StackVisitor::SetFPR(uint32_t reg, uintptr_t value) { |
| 574 | DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine"; |
| 575 | DCHECK(context_ != nullptr); |
| 576 | context_->SetFPR(reg, value); |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 577 | } |
| 578 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 579 | uintptr_t StackVisitor::GetReturnPc() const { |
Ian Rogers | 1373595 | 2014-10-08 12:43:28 -0700 | [diff] [blame] | 580 | uint8_t* sp = reinterpret_cast<uint8_t*>(GetCurrentQuickFrame()); |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 581 | DCHECK(sp != NULL); |
Ian Rogers | 6f3dbba | 2014-10-14 17:41:57 -0700 | [diff] [blame] | 582 | uint8_t* pc_addr = sp + GetMethod()->GetReturnPcOffset().SizeValue(); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 583 | return *reinterpret_cast<uintptr_t*>(pc_addr); |
| 584 | } |
| 585 | |
| 586 | void StackVisitor::SetReturnPc(uintptr_t new_ret_pc) { |
Ian Rogers | 1373595 | 2014-10-08 12:43:28 -0700 | [diff] [blame] | 587 | uint8_t* sp = reinterpret_cast<uint8_t*>(GetCurrentQuickFrame()); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 588 | CHECK(sp != NULL); |
Ian Rogers | 6f3dbba | 2014-10-14 17:41:57 -0700 | [diff] [blame] | 589 | uint8_t* pc_addr = sp + GetMethod()->GetReturnPcOffset().SizeValue(); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 590 | *reinterpret_cast<uintptr_t*>(pc_addr) = new_ret_pc; |
| 591 | } |
| 592 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 593 | size_t StackVisitor::ComputeNumFrames(Thread* thread) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 594 | struct NumFramesVisitor : public StackVisitor { |
Andreas Gampe | 277ccbd | 2014-11-03 21:36:10 -0800 | [diff] [blame] | 595 | explicit NumFramesVisitor(Thread* thread_in) |
| 596 | : StackVisitor(thread_in, NULL), frames(0) {} |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 597 | |
Ian Rogers | 5cf9819 | 2014-05-29 21:31:50 -0700 | [diff] [blame] | 598 | bool VisitFrame() OVERRIDE { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 599 | frames++; |
| 600 | return true; |
| 601 | } |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 602 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 603 | size_t frames; |
| 604 | }; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 605 | NumFramesVisitor visitor(thread); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 606 | visitor.WalkStack(true); |
| 607 | return visitor.frames; |
| 608 | } |
| 609 | |
Ian Rogers | 5cf9819 | 2014-05-29 21:31:50 -0700 | [diff] [blame] | 610 | bool StackVisitor::GetNextMethodAndDexPc(mirror::ArtMethod** next_method, uint32_t* next_dex_pc) { |
| 611 | struct HasMoreFramesVisitor : public StackVisitor { |
| 612 | explicit HasMoreFramesVisitor(Thread* thread, size_t num_frames, size_t frame_height) |
| 613 | : StackVisitor(thread, nullptr, num_frames), frame_height_(frame_height), |
| 614 | found_frame_(false), has_more_frames_(false), next_method_(nullptr), next_dex_pc_(0) { |
| 615 | } |
| 616 | |
| 617 | bool VisitFrame() OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 618 | if (found_frame_) { |
| 619 | mirror::ArtMethod* method = GetMethod(); |
| 620 | if (method != nullptr && !method->IsRuntimeMethod()) { |
| 621 | has_more_frames_ = true; |
| 622 | next_method_ = method; |
| 623 | next_dex_pc_ = GetDexPc(); |
| 624 | return false; // End stack walk once next method is found. |
| 625 | } |
| 626 | } else if (GetFrameHeight() == frame_height_) { |
| 627 | found_frame_ = true; |
| 628 | } |
| 629 | return true; |
| 630 | } |
| 631 | |
| 632 | size_t frame_height_; |
| 633 | bool found_frame_; |
| 634 | bool has_more_frames_; |
| 635 | mirror::ArtMethod* next_method_; |
| 636 | uint32_t next_dex_pc_; |
| 637 | }; |
| 638 | HasMoreFramesVisitor visitor(thread_, GetNumFrames(), GetFrameHeight()); |
| 639 | visitor.WalkStack(true); |
| 640 | *next_method = visitor.next_method_; |
| 641 | *next_dex_pc = visitor.next_dex_pc_; |
| 642 | return visitor.has_more_frames_; |
| 643 | } |
| 644 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 645 | void StackVisitor::DescribeStack(Thread* thread) { |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 646 | struct DescribeStackVisitor : public StackVisitor { |
Andreas Gampe | 277ccbd | 2014-11-03 21:36:10 -0800 | [diff] [blame] | 647 | explicit DescribeStackVisitor(Thread* thread_in) |
| 648 | : StackVisitor(thread_in, NULL) {} |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 649 | |
Ian Rogers | 5cf9819 | 2014-05-29 21:31:50 -0700 | [diff] [blame] | 650 | bool VisitFrame() OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 651 | LOG(INFO) << "Frame Id=" << GetFrameId() << " " << DescribeLocation(); |
| 652 | return true; |
| 653 | } |
| 654 | }; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 655 | DescribeStackVisitor visitor(thread); |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 656 | visitor.WalkStack(true); |
| 657 | } |
| 658 | |
Ian Rogers | 40e3bac | 2012-11-20 00:09:14 -0800 | [diff] [blame] | 659 | std::string StackVisitor::DescribeLocation() const { |
| 660 | std::string result("Visiting method '"); |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 661 | mirror::ArtMethod* m = GetMethod(); |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 662 | if (m == NULL) { |
| 663 | return "upcall"; |
| 664 | } |
| 665 | result += PrettyMethod(m); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 666 | result += StringPrintf("' at dex PC 0x%04x", GetDexPc()); |
Ian Rogers | 40e3bac | 2012-11-20 00:09:14 -0800 | [diff] [blame] | 667 | if (!IsShadowFrame()) { |
| 668 | result += StringPrintf(" (native PC %p)", reinterpret_cast<void*>(GetCurrentQuickFramePc())); |
| 669 | } |
| 670 | return result; |
| 671 | } |
| 672 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 673 | static instrumentation::InstrumentationStackFrame& GetInstrumentationStackFrame(Thread* thread, |
| 674 | uint32_t depth) { |
| 675 | CHECK_LT(depth, thread->GetInstrumentationStack()->size()); |
| 676 | return thread->GetInstrumentationStack()->at(depth); |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 677 | } |
| 678 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 679 | void StackVisitor::SanityCheckFrame() const { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 680 | if (kIsDebugBuild) { |
| 681 | mirror::ArtMethod* method = GetMethod(); |
Mathieu Chartier | 119c6bd | 2014-05-09 14:11:47 -0700 | [diff] [blame] | 682 | CHECK_EQ(method->GetClass(), mirror::ArtMethod::GetJavaLangReflectArtMethod()); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 683 | if (cur_quick_frame_ != nullptr) { |
| 684 | method->AssertPcIsWithinQuickCode(cur_quick_frame_pc_); |
| 685 | // Frame sanity. |
| 686 | size_t frame_size = method->GetFrameSizeInBytes(); |
| 687 | CHECK_NE(frame_size, 0u); |
Andreas Gampe | 5b417b9 | 2014-03-10 14:18:35 -0700 | [diff] [blame] | 688 | // A rough guess at an upper size we expect to see for a frame. |
| 689 | // 256 registers |
Mathieu Chartier | eb8167a | 2014-05-07 15:43:14 -0700 | [diff] [blame] | 690 | // 2 words HandleScope overhead |
Andreas Gampe | 5b417b9 | 2014-03-10 14:18:35 -0700 | [diff] [blame] | 691 | // 3+3 register spills |
| 692 | // TODO: this seems architecture specific for the case of JNI frames. |
Brian Carlstrom | ed08bd4 | 2014-03-19 18:34:17 -0700 | [diff] [blame] | 693 | // TODO: 083-compiler-regressions ManyFloatArgs shows this estimate is wrong. |
| 694 | // const size_t kMaxExpectedFrameSize = (256 + 2 + 3 + 3) * sizeof(word); |
| 695 | const size_t kMaxExpectedFrameSize = 2 * KB; |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 696 | CHECK_LE(frame_size, kMaxExpectedFrameSize); |
Ian Rogers | 6f3dbba | 2014-10-14 17:41:57 -0700 | [diff] [blame] | 697 | size_t return_pc_offset = method->GetReturnPcOffset().SizeValue(); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 698 | CHECK_LT(return_pc_offset, frame_size); |
| 699 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 700 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | void StackVisitor::WalkStack(bool include_transitions) { |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 704 | DCHECK(thread_ == Thread::Current() || thread_->IsSuspended()); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 705 | CHECK_EQ(cur_depth_, 0U); |
| 706 | bool exit_stubs_installed = Runtime::Current()->GetInstrumentation()->AreExitStubsInstalled(); |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 707 | uint32_t instrumentation_stack_depth = 0; |
Dave Allison | f943914 | 2014-03-27 15:10:22 -0700 | [diff] [blame] | 708 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 709 | for (const ManagedStack* current_fragment = thread_->GetManagedStack(); current_fragment != NULL; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 710 | current_fragment = current_fragment->GetLink()) { |
| 711 | cur_shadow_frame_ = current_fragment->GetTopShadowFrame(); |
| 712 | cur_quick_frame_ = current_fragment->GetTopQuickFrame(); |
Ian Rogers | 1d8cdbc | 2014-09-22 22:51:09 -0700 | [diff] [blame] | 713 | cur_quick_frame_pc_ = 0; |
Dave Allison | f943914 | 2014-03-27 15:10:22 -0700 | [diff] [blame] | 714 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 715 | if (cur_quick_frame_ != NULL) { // Handle quick stack frames. |
| 716 | // Can't be both a shadow and a quick fragment. |
| 717 | DCHECK(current_fragment->GetTopShadowFrame() == NULL); |
Andreas Gampe | cf4035a | 2014-05-28 22:43:01 -0700 | [diff] [blame] | 718 | mirror::ArtMethod* method = cur_quick_frame_->AsMirrorPtr(); |
jeffhao | 6641ea1 | 2013-01-02 18:13:42 -0800 | [diff] [blame] | 719 | while (method != NULL) { |
Dave Allison | 5cd3375 | 2014-04-15 15:57:58 -0700 | [diff] [blame] | 720 | SanityCheckFrame(); |
| 721 | bool should_continue = VisitFrame(); |
| 722 | if (UNLIKELY(!should_continue)) { |
| 723 | return; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 724 | } |
Dave Allison | 5cd3375 | 2014-04-15 15:57:58 -0700 | [diff] [blame] | 725 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 726 | if (context_ != NULL) { |
| 727 | context_->FillCalleeSaves(*this); |
| 728 | } |
| 729 | size_t frame_size = method->GetFrameSizeInBytes(); |
| 730 | // Compute PC for next stack frame from return PC. |
Ian Rogers | 6f3dbba | 2014-10-14 17:41:57 -0700 | [diff] [blame] | 731 | size_t return_pc_offset = method->GetReturnPcOffset(frame_size).SizeValue(); |
Ian Rogers | 1373595 | 2014-10-08 12:43:28 -0700 | [diff] [blame] | 732 | uint8_t* return_pc_addr = reinterpret_cast<uint8_t*>(cur_quick_frame_) + return_pc_offset; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 733 | uintptr_t return_pc = *reinterpret_cast<uintptr_t*>(return_pc_addr); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 734 | if (UNLIKELY(exit_stubs_installed)) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 735 | // While profiling, the return pc is restored from the side stack, except when walking |
| 736 | // the stack for an exception where the side stack will be unwound in VisitFrame. |
Ian Rogers | 6f3dbba | 2014-10-14 17:41:57 -0700 | [diff] [blame] | 737 | if (reinterpret_cast<uintptr_t>(GetQuickInstrumentationExitPc()) == return_pc) { |
Sebastien Hertz | 74e256b | 2013-10-04 10:40:37 +0200 | [diff] [blame] | 738 | const instrumentation::InstrumentationStackFrame& instrumentation_frame = |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 739 | GetInstrumentationStackFrame(thread_, instrumentation_stack_depth); |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 740 | instrumentation_stack_depth++; |
Jeff Hao | fb2802d | 2013-07-24 13:53:05 -0700 | [diff] [blame] | 741 | if (GetMethod() == Runtime::Current()->GetCalleeSaveMethod(Runtime::kSaveAll)) { |
| 742 | // Skip runtime save all callee frames which are used to deliver exceptions. |
| 743 | } else if (instrumentation_frame.interpreter_entry_) { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 744 | mirror::ArtMethod* callee = Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs); |
Jeff Hao | fb2802d | 2013-07-24 13:53:05 -0700 | [diff] [blame] | 745 | CHECK_EQ(GetMethod(), callee) << "Expected: " << PrettyMethod(callee) << " Found: " |
Sebastien Hertz | 138dbfc | 2013-12-04 18:15:25 +0100 | [diff] [blame] | 746 | << PrettyMethod(GetMethod()); |
Jeff Hao | 9a916d3 | 2013-06-27 18:45:37 -0700 | [diff] [blame] | 747 | } else if (instrumentation_frame.method_ != GetMethod()) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 748 | LOG(FATAL) << "Expected: " << PrettyMethod(instrumentation_frame.method_) |
Sebastien Hertz | 138dbfc | 2013-12-04 18:15:25 +0100 | [diff] [blame] | 749 | << " Found: " << PrettyMethod(GetMethod()); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 750 | } |
| 751 | if (num_frames_ != 0) { |
| 752 | // Check agreement of frame Ids only if num_frames_ is computed to avoid infinite |
| 753 | // recursion. |
| 754 | CHECK(instrumentation_frame.frame_id_ == GetFrameId()) |
| 755 | << "Expected: " << instrumentation_frame.frame_id_ |
| 756 | << " Found: " << GetFrameId(); |
| 757 | } |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 758 | return_pc = instrumentation_frame.return_pc_; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 759 | } |
| 760 | } |
| 761 | cur_quick_frame_pc_ = return_pc; |
Ian Rogers | 1373595 | 2014-10-08 12:43:28 -0700 | [diff] [blame] | 762 | uint8_t* next_frame = reinterpret_cast<uint8_t*>(cur_quick_frame_) + frame_size; |
Andreas Gampe | cf4035a | 2014-05-28 22:43:01 -0700 | [diff] [blame] | 763 | cur_quick_frame_ = reinterpret_cast<StackReference<mirror::ArtMethod>*>(next_frame); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 764 | cur_depth_++; |
Andreas Gampe | cf4035a | 2014-05-28 22:43:01 -0700 | [diff] [blame] | 765 | method = cur_quick_frame_->AsMirrorPtr(); |
jeffhao | 6641ea1 | 2013-01-02 18:13:42 -0800 | [diff] [blame] | 766 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 767 | } else if (cur_shadow_frame_ != NULL) { |
| 768 | do { |
| 769 | SanityCheckFrame(); |
| 770 | bool should_continue = VisitFrame(); |
| 771 | if (UNLIKELY(!should_continue)) { |
| 772 | return; |
| 773 | } |
| 774 | cur_depth_++; |
| 775 | cur_shadow_frame_ = cur_shadow_frame_->GetLink(); |
Brian Carlstrom | df62950 | 2013-07-17 22:39:56 -0700 | [diff] [blame] | 776 | } while (cur_shadow_frame_ != NULL); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 777 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 778 | if (include_transitions) { |
| 779 | bool should_continue = VisitFrame(); |
| 780 | if (!should_continue) { |
| 781 | return; |
| 782 | } |
| 783 | } |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 784 | cur_depth_++; |
| 785 | } |
| 786 | if (num_frames_ != 0) { |
| 787 | CHECK_EQ(cur_depth_, num_frames_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 788 | } |
| 789 | } |
| 790 | |
Mathieu Chartier | e34fa1d | 2015-01-14 14:55:47 -0800 | [diff] [blame] | 791 | void JavaFrameRootInfo::Describe(std::ostream& os) const { |
| 792 | const StackVisitor* visitor = stack_visitor_; |
| 793 | CHECK(visitor != nullptr); |
| 794 | os << "Type=" << GetType() << " thread_id=" << GetThreadId() << " location=" << |
| 795 | visitor->DescribeLocation() << " vreg=" << vreg_; |
| 796 | } |
| 797 | |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 798 | } // namespace art |