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 | |
Dave Allison | f943914 | 2014-03-27 15:10:22 -0700 | [diff] [blame] | 19 | #include "base/hex_dump.h" |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 20 | #include "mirror/art_method-inl.h" |
Ian Rogers | 4f6ad8a | 2013-03-18 15:27:28 -0700 | [diff] [blame] | 21 | #include "mirror/class-inl.h" |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 22 | #include "mirror/object.h" |
| 23 | #include "mirror/object-inl.h" |
| 24 | #include "mirror/object_array-inl.h" |
Ian Rogers | 6d4d9fc | 2011-11-30 16:24:48 -0800 | [diff] [blame] | 25 | #include "object_utils.h" |
Vladimir Marko | 7624d25 | 2014-05-02 14:40:15 +0100 | [diff] [blame] | 26 | #include "quick/quick_method_frame_info.h" |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 27 | #include "runtime.h" |
Dave Allison | f943914 | 2014-03-27 15:10:22 -0700 | [diff] [blame] | 28 | #include "thread.h" |
Elliott Hughes | bfe487b | 2011-10-26 15:48:55 -0700 | [diff] [blame] | 29 | #include "thread_list.h" |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 30 | #include "throw_location.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 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 59 | ThrowLocation ShadowFrame::GetCurrentLocationForThrow() const { |
| 60 | return ThrowLocation(GetThisObject(), GetMethod(), GetDexPC()); |
| 61 | } |
| 62 | |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 63 | size_t ManagedStack::NumJniShadowFrameReferences() const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 64 | size_t count = 0; |
| 65 | for (const ManagedStack* current_fragment = this; current_fragment != NULL; |
| 66 | current_fragment = current_fragment->GetLink()) { |
| 67 | for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_; current_frame != NULL; |
| 68 | current_frame = current_frame->GetLink()) { |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 69 | if (current_frame->GetMethod()->IsNative()) { |
| 70 | // The JNI ShadowFrame only contains references. (For indirect reference.) |
| 71 | count += current_frame->NumberOfVRegs(); |
| 72 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 73 | } |
| 74 | } |
| 75 | return count; |
| 76 | } |
| 77 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 78 | bool ManagedStack::ShadowFramesContain(StackReference<mirror::Object>* shadow_frame_entry) const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 79 | for (const ManagedStack* current_fragment = this; current_fragment != NULL; |
| 80 | current_fragment = current_fragment->GetLink()) { |
| 81 | for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_; current_frame != NULL; |
| 82 | current_frame = current_frame->GetLink()) { |
| 83 | if (current_frame->Contains(shadow_frame_entry)) { |
| 84 | return true; |
| 85 | } |
| 86 | } |
| 87 | } |
| 88 | return false; |
| 89 | } |
| 90 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 91 | StackVisitor::StackVisitor(Thread* thread, Context* context) |
| 92 | : thread_(thread), cur_shadow_frame_(NULL), |
| 93 | cur_quick_frame_(NULL), cur_quick_frame_pc_(0), num_frames_(0), cur_depth_(0), |
| 94 | context_(context) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 95 | DCHECK(thread == Thread::Current() || thread->IsSuspended()) << *thread; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 96 | } |
| 97 | |
Ian Rogers | 5cf9819 | 2014-05-29 21:31:50 -0700 | [diff] [blame] | 98 | StackVisitor::StackVisitor(Thread* thread, Context* context, size_t num_frames) |
| 99 | : thread_(thread), cur_shadow_frame_(NULL), |
| 100 | cur_quick_frame_(NULL), cur_quick_frame_pc_(0), num_frames_(num_frames), cur_depth_(0), |
| 101 | context_(context) { |
| 102 | DCHECK(thread == Thread::Current() || thread->IsSuspended()) << *thread; |
| 103 | } |
| 104 | |
Dave Allison | b373e09 | 2014-02-20 16:06:36 -0800 | [diff] [blame] | 105 | uint32_t StackVisitor::GetDexPc(bool abort_on_failure) const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 106 | if (cur_shadow_frame_ != NULL) { |
| 107 | return cur_shadow_frame_->GetDexPC(); |
| 108 | } else if (cur_quick_frame_ != NULL) { |
Dave Allison | b373e09 | 2014-02-20 16:06:36 -0800 | [diff] [blame] | 109 | return GetMethod()->ToDexPc(cur_quick_frame_pc_, abort_on_failure); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 110 | } else { |
| 111 | return 0; |
| 112 | } |
| 113 | } |
| 114 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 115 | mirror::Object* StackVisitor::GetThisObject() const { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 116 | mirror::ArtMethod* m = GetMethod(); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 117 | if (m->IsStatic()) { |
| 118 | return NULL; |
| 119 | } else if (m->IsNative()) { |
| 120 | if (cur_quick_frame_ != NULL) { |
Mathieu Chartier | eb8167a | 2014-05-07 15:43:14 -0700 | [diff] [blame] | 121 | HandleScope* hs = reinterpret_cast<HandleScope*>( |
| 122 | reinterpret_cast<char*>(cur_quick_frame_) + m->GetHandleScopeOffsetInBytes()); |
| 123 | return hs->GetReference(0); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 124 | } else { |
| 125 | return cur_shadow_frame_->GetVRegReference(0); |
| 126 | } |
| 127 | } else { |
Mathieu Chartier | bfd9a43 | 2014-05-21 17:43:44 -0700 | [diff] [blame] | 128 | const DexFile::CodeItem* code_item = m->GetCodeItem(); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 129 | if (code_item == NULL) { |
Ian Rogers | e0dcd46 | 2014-03-08 15:21:04 -0800 | [diff] [blame] | 130 | UNIMPLEMENTED(ERROR) << "Failed to determine this object of abstract or proxy method: " |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 131 | << PrettyMethod(m); |
Ian Rogers | e0dcd46 | 2014-03-08 15:21:04 -0800 | [diff] [blame] | 132 | return nullptr; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 133 | } else { |
| 134 | uint16_t reg = code_item->registers_size_ - code_item->ins_size_; |
| 135 | return reinterpret_cast<mirror::Object*>(GetVReg(m, reg, kReferenceVReg)); |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | |
Ian Rogers | 0c7abda | 2012-09-19 13:33:42 -0700 | [diff] [blame] | 140 | size_t StackVisitor::GetNativePcOffset() const { |
| 141 | DCHECK(!IsShadowFrame()); |
| 142 | return GetMethod()->NativePcOffset(cur_quick_frame_pc_); |
| 143 | } |
| 144 | |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 145 | bool StackVisitor::GetVReg(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind, |
| 146 | uint32_t* val) const { |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 147 | if (cur_quick_frame_ != NULL) { |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 148 | DCHECK(context_ != NULL); // You can't reliably read registers without a context. |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 149 | DCHECK(m == GetMethod()); |
Vladimir Marko | 4c1c510 | 2014-05-14 16:51:16 +0100 | [diff] [blame] | 150 | const void* code_pointer = m->GetQuickOatCodePointer(); |
| 151 | DCHECK(code_pointer != nullptr); |
| 152 | const VmapTable vmap_table(m->GetVmapTable(code_pointer)); |
| 153 | QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 154 | uint32_t vmap_offset; |
| 155 | // TODO: IsInContext stops before spotting floating point registers. |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 156 | if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) { |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 157 | bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
Vladimir Marko | 7624d25 | 2014-05-02 14:40:15 +0100 | [diff] [blame] | 158 | uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask(); |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 159 | uint32_t reg = vmap_table.ComputeRegister(spill_mask, vmap_offset, kind); |
| 160 | uintptr_t ptr_val; |
| 161 | bool success = false; |
| 162 | if (is_float) { |
| 163 | success = GetFPR(reg, &ptr_val); |
| 164 | } else { |
| 165 | success = GetGPR(reg, &ptr_val); |
| 166 | } |
| 167 | *val = ptr_val; |
| 168 | return success; |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 169 | } else { |
Mathieu Chartier | bfd9a43 | 2014-05-21 17:43:44 -0700 | [diff] [blame] | 170 | const DexFile::CodeItem* code_item = m->GetCodeItem(); |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 171 | DCHECK(code_item != NULL) << PrettyMethod(m); // Can't be NULL or how would we compile its instructions? |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 172 | *val = *GetVRegAddr(cur_quick_frame_, code_item, frame_info.CoreSpillMask(), |
Vladimir Marko | 7624d25 | 2014-05-02 14:40:15 +0100 | [diff] [blame] | 173 | frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg); |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 174 | return true; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 175 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 176 | } else { |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 177 | *val = cur_shadow_frame_->GetVReg(vreg); |
| 178 | return true; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 179 | } |
| 180 | } |
| 181 | |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 182 | 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] | 183 | VRegKind kind) { |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 184 | if (cur_quick_frame_ != NULL) { |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 185 | DCHECK(context_ != NULL); // You can't reliably write registers without a context. |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 186 | DCHECK(m == GetMethod()); |
Vladimir Marko | 4c1c510 | 2014-05-14 16:51:16 +0100 | [diff] [blame] | 187 | const void* code_pointer = m->GetQuickOatCodePointer(); |
| 188 | DCHECK(code_pointer != nullptr); |
| 189 | const VmapTable vmap_table(m->GetVmapTable(code_pointer)); |
| 190 | QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 191 | uint32_t vmap_offset; |
| 192 | // TODO: IsInContext stops before spotting floating point registers. |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 193 | if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) { |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 194 | bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
Vladimir Marko | 7624d25 | 2014-05-02 14:40:15 +0100 | [diff] [blame] | 195 | uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask(); |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 196 | const uint32_t reg = vmap_table.ComputeRegister(spill_mask, vmap_offset, kind); |
| 197 | if (is_float) { |
| 198 | return SetFPR(reg, new_value); |
| 199 | } else { |
| 200 | return SetGPR(reg, new_value); |
| 201 | } |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 202 | } else { |
Mathieu Chartier | bfd9a43 | 2014-05-21 17:43:44 -0700 | [diff] [blame] | 203 | const DexFile::CodeItem* code_item = m->GetCodeItem(); |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 204 | DCHECK(code_item != NULL) << PrettyMethod(m); // Can't be NULL or how would we compile its instructions? |
Vladimir Marko | 7624d25 | 2014-05-02 14:40:15 +0100 | [diff] [blame] | 205 | int offset = GetVRegOffset(code_item, frame_info.CoreSpillMask(), frame_info.FpSpillMask(), |
| 206 | frame_info.FrameSizeInBytes(), vreg, kRuntimeISA); |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 207 | byte* vreg_addr = reinterpret_cast<byte*>(GetCurrentQuickFrame()) + offset; |
| 208 | *reinterpret_cast<uint32_t*>(vreg_addr) = new_value; |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 209 | return true; |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 210 | } |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 211 | } else { |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 212 | cur_shadow_frame_->SetVReg(vreg, new_value); |
| 213 | return true; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 214 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 215 | } |
| 216 | |
Mathieu Chartier | 815873e | 2014-02-13 18:02:13 -0800 | [diff] [blame] | 217 | uintptr_t* StackVisitor::GetGPRAddress(uint32_t reg) const { |
| 218 | DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine"; |
| 219 | return context_->GetGPRAddress(reg); |
| 220 | } |
| 221 | |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 222 | bool StackVisitor::GetGPR(uint32_t reg, uintptr_t* val) const { |
Brian Carlstrom | df62950 | 2013-07-17 22:39:56 -0700 | [diff] [blame] | 223 | DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine"; |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 224 | return context_->GetGPR(reg, val); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 225 | } |
| 226 | |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 227 | bool StackVisitor::SetGPR(uint32_t reg, uintptr_t value) { |
Brian Carlstrom | df62950 | 2013-07-17 22:39:56 -0700 | [diff] [blame] | 228 | DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine"; |
Sebastien Hertz | 0bcb290 | 2014-06-17 15:52:45 +0200 | [diff] [blame^] | 229 | return context_->SetGPR(reg, value); |
| 230 | } |
| 231 | |
| 232 | bool StackVisitor::GetFPR(uint32_t reg, uintptr_t* val) const { |
| 233 | DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine"; |
| 234 | return context_->GetFPR(reg, val); |
| 235 | } |
| 236 | |
| 237 | bool StackVisitor::SetFPR(uint32_t reg, uintptr_t value) { |
| 238 | DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine"; |
| 239 | return context_->SetFPR(reg, value); |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 240 | } |
| 241 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 242 | uintptr_t StackVisitor::GetReturnPc() const { |
Andreas Gampe | cf4035a | 2014-05-28 22:43:01 -0700 | [diff] [blame] | 243 | byte* sp = reinterpret_cast<byte*>(GetCurrentQuickFrame()); |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 244 | DCHECK(sp != NULL); |
Andreas Gampe | cf4035a | 2014-05-28 22:43:01 -0700 | [diff] [blame] | 245 | byte* pc_addr = sp + GetMethod()->GetReturnPcOffsetInBytes(); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 246 | return *reinterpret_cast<uintptr_t*>(pc_addr); |
| 247 | } |
| 248 | |
| 249 | void StackVisitor::SetReturnPc(uintptr_t new_ret_pc) { |
Andreas Gampe | cf4035a | 2014-05-28 22:43:01 -0700 | [diff] [blame] | 250 | byte* sp = reinterpret_cast<byte*>(GetCurrentQuickFrame()); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 251 | CHECK(sp != NULL); |
Andreas Gampe | cf4035a | 2014-05-28 22:43:01 -0700 | [diff] [blame] | 252 | byte* pc_addr = sp + GetMethod()->GetReturnPcOffsetInBytes(); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 253 | *reinterpret_cast<uintptr_t*>(pc_addr) = new_ret_pc; |
| 254 | } |
| 255 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 256 | size_t StackVisitor::ComputeNumFrames(Thread* thread) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 257 | struct NumFramesVisitor : public StackVisitor { |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 258 | explicit NumFramesVisitor(Thread* thread) |
| 259 | : StackVisitor(thread, NULL), frames(0) {} |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 260 | |
Ian Rogers | 5cf9819 | 2014-05-29 21:31:50 -0700 | [diff] [blame] | 261 | bool VisitFrame() OVERRIDE { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 262 | frames++; |
| 263 | return true; |
| 264 | } |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 265 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 266 | size_t frames; |
| 267 | }; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 268 | NumFramesVisitor visitor(thread); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 269 | visitor.WalkStack(true); |
| 270 | return visitor.frames; |
| 271 | } |
| 272 | |
Ian Rogers | 5cf9819 | 2014-05-29 21:31:50 -0700 | [diff] [blame] | 273 | bool StackVisitor::GetNextMethodAndDexPc(mirror::ArtMethod** next_method, uint32_t* next_dex_pc) { |
| 274 | struct HasMoreFramesVisitor : public StackVisitor { |
| 275 | explicit HasMoreFramesVisitor(Thread* thread, size_t num_frames, size_t frame_height) |
| 276 | : StackVisitor(thread, nullptr, num_frames), frame_height_(frame_height), |
| 277 | found_frame_(false), has_more_frames_(false), next_method_(nullptr), next_dex_pc_(0) { |
| 278 | } |
| 279 | |
| 280 | bool VisitFrame() OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 281 | if (found_frame_) { |
| 282 | mirror::ArtMethod* method = GetMethod(); |
| 283 | if (method != nullptr && !method->IsRuntimeMethod()) { |
| 284 | has_more_frames_ = true; |
| 285 | next_method_ = method; |
| 286 | next_dex_pc_ = GetDexPc(); |
| 287 | return false; // End stack walk once next method is found. |
| 288 | } |
| 289 | } else if (GetFrameHeight() == frame_height_) { |
| 290 | found_frame_ = true; |
| 291 | } |
| 292 | return true; |
| 293 | } |
| 294 | |
| 295 | size_t frame_height_; |
| 296 | bool found_frame_; |
| 297 | bool has_more_frames_; |
| 298 | mirror::ArtMethod* next_method_; |
| 299 | uint32_t next_dex_pc_; |
| 300 | }; |
| 301 | HasMoreFramesVisitor visitor(thread_, GetNumFrames(), GetFrameHeight()); |
| 302 | visitor.WalkStack(true); |
| 303 | *next_method = visitor.next_method_; |
| 304 | *next_dex_pc = visitor.next_dex_pc_; |
| 305 | return visitor.has_more_frames_; |
| 306 | } |
| 307 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 308 | void StackVisitor::DescribeStack(Thread* thread) { |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 309 | struct DescribeStackVisitor : public StackVisitor { |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 310 | explicit DescribeStackVisitor(Thread* thread) |
| 311 | : StackVisitor(thread, NULL) {} |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 312 | |
Ian Rogers | 5cf9819 | 2014-05-29 21:31:50 -0700 | [diff] [blame] | 313 | bool VisitFrame() OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 314 | LOG(INFO) << "Frame Id=" << GetFrameId() << " " << DescribeLocation(); |
| 315 | return true; |
| 316 | } |
| 317 | }; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 318 | DescribeStackVisitor visitor(thread); |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 319 | visitor.WalkStack(true); |
| 320 | } |
| 321 | |
Ian Rogers | 40e3bac | 2012-11-20 00:09:14 -0800 | [diff] [blame] | 322 | std::string StackVisitor::DescribeLocation() const { |
| 323 | std::string result("Visiting method '"); |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 324 | mirror::ArtMethod* m = GetMethod(); |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 325 | if (m == NULL) { |
| 326 | return "upcall"; |
| 327 | } |
| 328 | result += PrettyMethod(m); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 329 | result += StringPrintf("' at dex PC 0x%04x", GetDexPc()); |
Ian Rogers | 40e3bac | 2012-11-20 00:09:14 -0800 | [diff] [blame] | 330 | if (!IsShadowFrame()) { |
| 331 | result += StringPrintf(" (native PC %p)", reinterpret_cast<void*>(GetCurrentQuickFramePc())); |
| 332 | } |
| 333 | return result; |
| 334 | } |
| 335 | |
Sebastien Hertz | 74e256b | 2013-10-04 10:40:37 +0200 | [diff] [blame] | 336 | instrumentation::InstrumentationStackFrame& StackVisitor::GetInstrumentationStackFrame(uint32_t depth) const { |
Sebastien Hertz | 123756a | 2013-11-27 15:49:42 +0100 | [diff] [blame] | 337 | CHECK_LT(depth, thread_->GetInstrumentationStack()->size()); |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 338 | return thread_->GetInstrumentationStack()->at(depth); |
| 339 | } |
| 340 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 341 | void StackVisitor::SanityCheckFrame() const { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 342 | if (kIsDebugBuild) { |
| 343 | mirror::ArtMethod* method = GetMethod(); |
Mathieu Chartier | 119c6bd | 2014-05-09 14:11:47 -0700 | [diff] [blame] | 344 | CHECK_EQ(method->GetClass(), mirror::ArtMethod::GetJavaLangReflectArtMethod()); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 345 | if (cur_quick_frame_ != nullptr) { |
| 346 | method->AssertPcIsWithinQuickCode(cur_quick_frame_pc_); |
| 347 | // Frame sanity. |
| 348 | size_t frame_size = method->GetFrameSizeInBytes(); |
| 349 | CHECK_NE(frame_size, 0u); |
Andreas Gampe | 5b417b9 | 2014-03-10 14:18:35 -0700 | [diff] [blame] | 350 | // A rough guess at an upper size we expect to see for a frame. |
| 351 | // 256 registers |
Mathieu Chartier | eb8167a | 2014-05-07 15:43:14 -0700 | [diff] [blame] | 352 | // 2 words HandleScope overhead |
Andreas Gampe | 5b417b9 | 2014-03-10 14:18:35 -0700 | [diff] [blame] | 353 | // 3+3 register spills |
| 354 | // TODO: this seems architecture specific for the case of JNI frames. |
Brian Carlstrom | ed08bd4 | 2014-03-19 18:34:17 -0700 | [diff] [blame] | 355 | // TODO: 083-compiler-regressions ManyFloatArgs shows this estimate is wrong. |
| 356 | // const size_t kMaxExpectedFrameSize = (256 + 2 + 3 + 3) * sizeof(word); |
| 357 | const size_t kMaxExpectedFrameSize = 2 * KB; |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 358 | CHECK_LE(frame_size, kMaxExpectedFrameSize); |
| 359 | size_t return_pc_offset = method->GetReturnPcOffsetInBytes(); |
| 360 | CHECK_LT(return_pc_offset, frame_size); |
| 361 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 362 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 363 | } |
| 364 | |
| 365 | void StackVisitor::WalkStack(bool include_transitions) { |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 366 | DCHECK(thread_ == Thread::Current() || thread_->IsSuspended()); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 367 | CHECK_EQ(cur_depth_, 0U); |
| 368 | bool exit_stubs_installed = Runtime::Current()->GetInstrumentation()->AreExitStubsInstalled(); |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 369 | uint32_t instrumentation_stack_depth = 0; |
Dave Allison | f943914 | 2014-03-27 15:10:22 -0700 | [diff] [blame] | 370 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 371 | for (const ManagedStack* current_fragment = thread_->GetManagedStack(); current_fragment != NULL; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 372 | current_fragment = current_fragment->GetLink()) { |
| 373 | cur_shadow_frame_ = current_fragment->GetTopShadowFrame(); |
| 374 | cur_quick_frame_ = current_fragment->GetTopQuickFrame(); |
| 375 | cur_quick_frame_pc_ = current_fragment->GetTopQuickFramePc(); |
Dave Allison | f943914 | 2014-03-27 15:10:22 -0700 | [diff] [blame] | 376 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 377 | if (cur_quick_frame_ != NULL) { // Handle quick stack frames. |
| 378 | // Can't be both a shadow and a quick fragment. |
| 379 | DCHECK(current_fragment->GetTopShadowFrame() == NULL); |
Andreas Gampe | cf4035a | 2014-05-28 22:43:01 -0700 | [diff] [blame] | 380 | mirror::ArtMethod* method = cur_quick_frame_->AsMirrorPtr(); |
jeffhao | 6641ea1 | 2013-01-02 18:13:42 -0800 | [diff] [blame] | 381 | while (method != NULL) { |
Dave Allison | 5cd3375 | 2014-04-15 15:57:58 -0700 | [diff] [blame] | 382 | SanityCheckFrame(); |
| 383 | bool should_continue = VisitFrame(); |
| 384 | if (UNLIKELY(!should_continue)) { |
| 385 | return; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 386 | } |
Dave Allison | 5cd3375 | 2014-04-15 15:57:58 -0700 | [diff] [blame] | 387 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 388 | if (context_ != NULL) { |
| 389 | context_->FillCalleeSaves(*this); |
| 390 | } |
| 391 | size_t frame_size = method->GetFrameSizeInBytes(); |
| 392 | // Compute PC for next stack frame from return PC. |
Vladimir Marko | 4c1c510 | 2014-05-14 16:51:16 +0100 | [diff] [blame] | 393 | size_t return_pc_offset = method->GetReturnPcOffsetInBytes(frame_size); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 394 | byte* return_pc_addr = reinterpret_cast<byte*>(cur_quick_frame_) + return_pc_offset; |
| 395 | uintptr_t return_pc = *reinterpret_cast<uintptr_t*>(return_pc_addr); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 396 | if (UNLIKELY(exit_stubs_installed)) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 397 | // While profiling, the return pc is restored from the side stack, except when walking |
| 398 | // the stack for an exception where the side stack will be unwound in VisitFrame. |
Ian Rogers | 848871b | 2013-08-05 10:56:33 -0700 | [diff] [blame] | 399 | if (GetQuickInstrumentationExitPc() == return_pc) { |
Sebastien Hertz | 74e256b | 2013-10-04 10:40:37 +0200 | [diff] [blame] | 400 | const instrumentation::InstrumentationStackFrame& instrumentation_frame = |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 401 | GetInstrumentationStackFrame(instrumentation_stack_depth); |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 402 | instrumentation_stack_depth++; |
Jeff Hao | fb2802d | 2013-07-24 13:53:05 -0700 | [diff] [blame] | 403 | if (GetMethod() == Runtime::Current()->GetCalleeSaveMethod(Runtime::kSaveAll)) { |
| 404 | // Skip runtime save all callee frames which are used to deliver exceptions. |
| 405 | } else if (instrumentation_frame.interpreter_entry_) { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 406 | mirror::ArtMethod* callee = Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs); |
Jeff Hao | fb2802d | 2013-07-24 13:53:05 -0700 | [diff] [blame] | 407 | CHECK_EQ(GetMethod(), callee) << "Expected: " << PrettyMethod(callee) << " Found: " |
Sebastien Hertz | 138dbfc | 2013-12-04 18:15:25 +0100 | [diff] [blame] | 408 | << PrettyMethod(GetMethod()); |
Jeff Hao | 9a916d3 | 2013-06-27 18:45:37 -0700 | [diff] [blame] | 409 | } else if (instrumentation_frame.method_ != GetMethod()) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 410 | LOG(FATAL) << "Expected: " << PrettyMethod(instrumentation_frame.method_) |
Sebastien Hertz | 138dbfc | 2013-12-04 18:15:25 +0100 | [diff] [blame] | 411 | << " Found: " << PrettyMethod(GetMethod()); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 412 | } |
| 413 | if (num_frames_ != 0) { |
| 414 | // Check agreement of frame Ids only if num_frames_ is computed to avoid infinite |
| 415 | // recursion. |
| 416 | CHECK(instrumentation_frame.frame_id_ == GetFrameId()) |
| 417 | << "Expected: " << instrumentation_frame.frame_id_ |
| 418 | << " Found: " << GetFrameId(); |
| 419 | } |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 420 | return_pc = instrumentation_frame.return_pc_; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 421 | } |
| 422 | } |
| 423 | cur_quick_frame_pc_ = return_pc; |
| 424 | byte* next_frame = reinterpret_cast<byte*>(cur_quick_frame_) + frame_size; |
Andreas Gampe | cf4035a | 2014-05-28 22:43:01 -0700 | [diff] [blame] | 425 | cur_quick_frame_ = reinterpret_cast<StackReference<mirror::ArtMethod>*>(next_frame); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 426 | cur_depth_++; |
Andreas Gampe | cf4035a | 2014-05-28 22:43:01 -0700 | [diff] [blame] | 427 | method = cur_quick_frame_->AsMirrorPtr(); |
jeffhao | 6641ea1 | 2013-01-02 18:13:42 -0800 | [diff] [blame] | 428 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 429 | } else if (cur_shadow_frame_ != NULL) { |
| 430 | do { |
| 431 | SanityCheckFrame(); |
| 432 | bool should_continue = VisitFrame(); |
| 433 | if (UNLIKELY(!should_continue)) { |
| 434 | return; |
| 435 | } |
| 436 | cur_depth_++; |
| 437 | cur_shadow_frame_ = cur_shadow_frame_->GetLink(); |
Brian Carlstrom | df62950 | 2013-07-17 22:39:56 -0700 | [diff] [blame] | 438 | } while (cur_shadow_frame_ != NULL); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 439 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 440 | if (include_transitions) { |
| 441 | bool should_continue = VisitFrame(); |
| 442 | if (!should_continue) { |
| 443 | return; |
| 444 | } |
| 445 | } |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 446 | cur_depth_++; |
| 447 | } |
| 448 | if (num_frames_ != 0) { |
| 449 | CHECK_EQ(cur_depth_, num_frames_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 450 | } |
| 451 | } |
| 452 | |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 453 | } // namespace art |