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 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 19 | #include "mirror/art_method-inl.h" |
Ian Rogers | 4f6ad8a | 2013-03-18 15:27:28 -0700 | [diff] [blame] | 20 | #include "mirror/class-inl.h" |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 21 | #include "mirror/object.h" |
| 22 | #include "mirror/object-inl.h" |
| 23 | #include "mirror/object_array-inl.h" |
Ian Rogers | 6d4d9fc | 2011-11-30 16:24:48 -0800 | [diff] [blame] | 24 | #include "object_utils.h" |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 25 | #include "runtime.h" |
Elliott Hughes | bfe487b | 2011-10-26 15:48:55 -0700 | [diff] [blame] | 26 | #include "thread_list.h" |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 27 | #include "throw_location.h" |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 28 | #include "vmap_table.h" |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 29 | |
Elliott Hughes | 11d1b0c | 2012-01-23 16:57:47 -0800 | [diff] [blame] | 30 | namespace art { |
| 31 | |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 32 | bool ShadowFrame::VerifyReference(const mirror::Object* val) const { |
| 33 | return !Runtime::Current()->GetHeap()->IsInTempSpace(val); |
| 34 | } |
| 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 { |
| 43 | const DexFile::CodeItem* code_item = MethodHelper(m).GetCodeItem(); |
| 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 | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 98 | uint32_t StackVisitor::GetDexPc() const { |
| 99 | if (cur_shadow_frame_ != NULL) { |
| 100 | return cur_shadow_frame_->GetDexPC(); |
| 101 | } else if (cur_quick_frame_ != NULL) { |
Ian Rogers | 0c7abda | 2012-09-19 13:33:42 -0700 | [diff] [blame] | 102 | return GetMethod()->ToDexPc(cur_quick_frame_pc_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 103 | } else { |
| 104 | return 0; |
| 105 | } |
| 106 | } |
| 107 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 108 | mirror::Object* StackVisitor::GetThisObject() const { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 109 | mirror::ArtMethod* m = GetMethod(); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 110 | if (m->IsStatic()) { |
| 111 | return NULL; |
| 112 | } else if (m->IsNative()) { |
| 113 | if (cur_quick_frame_ != NULL) { |
| 114 | StackIndirectReferenceTable* sirt = |
| 115 | reinterpret_cast<StackIndirectReferenceTable*>( |
| 116 | reinterpret_cast<char*>(cur_quick_frame_) + |
| 117 | m->GetSirtOffsetInBytes()); |
| 118 | return sirt->GetReference(0); |
| 119 | } else { |
| 120 | return cur_shadow_frame_->GetVRegReference(0); |
| 121 | } |
| 122 | } else { |
| 123 | const DexFile::CodeItem* code_item = MethodHelper(m).GetCodeItem(); |
| 124 | if (code_item == NULL) { |
| 125 | UNIMPLEMENTED(ERROR) << "Failed to determine this object of abstract or proxy method" |
| 126 | << PrettyMethod(m); |
| 127 | return NULL; |
| 128 | } else { |
| 129 | uint16_t reg = code_item->registers_size_ - code_item->ins_size_; |
| 130 | return reinterpret_cast<mirror::Object*>(GetVReg(m, reg, kReferenceVReg)); |
| 131 | } |
| 132 | } |
| 133 | } |
| 134 | |
Ian Rogers | 0c7abda | 2012-09-19 13:33:42 -0700 | [diff] [blame] | 135 | size_t StackVisitor::GetNativePcOffset() const { |
| 136 | DCHECK(!IsShadowFrame()); |
| 137 | return GetMethod()->NativePcOffset(cur_quick_frame_pc_); |
| 138 | } |
| 139 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 140 | uint32_t StackVisitor::GetVReg(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind) const { |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 141 | if (cur_quick_frame_ != NULL) { |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 142 | DCHECK(context_ != NULL); // You can't reliably read registers without a context. |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 143 | DCHECK(m == GetMethod()); |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 144 | const VmapTable vmap_table(m->GetVmapTable()); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 145 | uint32_t vmap_offset; |
| 146 | // TODO: IsInContext stops before spotting floating point registers. |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 147 | if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) { |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 148 | bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
| 149 | uint32_t spill_mask = is_float ? m->GetFpSpillMask() |
| 150 | : m->GetCoreSpillMask(); |
| 151 | return GetGPR(vmap_table.ComputeRegister(spill_mask, vmap_offset, kind)); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 152 | } else { |
| 153 | const DexFile::CodeItem* code_item = MethodHelper(m).GetCodeItem(); |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 154 | DCHECK(code_item != NULL) << PrettyMethod(m); // Can't be NULL or how would we compile its instructions? |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 155 | size_t frame_size = m->GetFrameSizeInBytes(); |
Mathieu Chartier | 423d2a3 | 2013-09-12 17:33:56 -0700 | [diff] [blame] | 156 | return *GetVRegAddr(cur_quick_frame_, code_item, m->GetCoreSpillMask(), m->GetFpSpillMask(), |
| 157 | frame_size, vreg); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 158 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 159 | } else { |
TDYa127 | 8e950c1 | 2012-11-02 09:58:19 -0700 | [diff] [blame] | 160 | return cur_shadow_frame_->GetVReg(vreg); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 161 | } |
| 162 | } |
| 163 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 164 | void StackVisitor::SetVReg(mirror::ArtMethod* m, uint16_t vreg, uint32_t new_value, |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 165 | VRegKind kind) { |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 166 | if (cur_quick_frame_ != NULL) { |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 167 | DCHECK(context_ != NULL); // You can't reliably write registers without a context. |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 168 | DCHECK(m == GetMethod()); |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 169 | const VmapTable vmap_table(m->GetVmapTable()); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 170 | uint32_t vmap_offset; |
| 171 | // TODO: IsInContext stops before spotting floating point registers. |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 172 | if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) { |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 173 | bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
| 174 | uint32_t spill_mask = is_float ? m->GetFpSpillMask() : m->GetCoreSpillMask(); |
| 175 | const uint32_t reg = vmap_table.ComputeRegister(spill_mask, vmap_offset, kReferenceVReg); |
| 176 | SetGPR(reg, new_value); |
| 177 | } else { |
| 178 | const DexFile::CodeItem* code_item = MethodHelper(m).GetCodeItem(); |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 179 | DCHECK(code_item != NULL) << PrettyMethod(m); // Can't be NULL or how would we compile its instructions? |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 180 | uint32_t core_spills = m->GetCoreSpillMask(); |
| 181 | uint32_t fp_spills = m->GetFpSpillMask(); |
| 182 | size_t frame_size = m->GetFrameSizeInBytes(); |
| 183 | int offset = GetVRegOffset(code_item, core_spills, fp_spills, frame_size, vreg); |
| 184 | byte* vreg_addr = reinterpret_cast<byte*>(GetCurrentQuickFrame()) + offset; |
| 185 | *reinterpret_cast<uint32_t*>(vreg_addr) = new_value; |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 186 | } |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 187 | } else { |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 188 | return cur_shadow_frame_->SetVReg(vreg, new_value); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 189 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | uintptr_t StackVisitor::GetGPR(uint32_t reg) const { |
Brian Carlstrom | df62950 | 2013-07-17 22:39:56 -0700 | [diff] [blame] | 193 | DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine"; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 194 | return context_->GetGPR(reg); |
| 195 | } |
| 196 | |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 197 | void StackVisitor::SetGPR(uint32_t reg, uintptr_t value) { |
Brian Carlstrom | df62950 | 2013-07-17 22:39:56 -0700 | [diff] [blame] | 198 | DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine"; |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 199 | context_->SetGPR(reg, value); |
| 200 | } |
| 201 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 202 | uintptr_t StackVisitor::GetReturnPc() const { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 203 | mirror::ArtMethod** sp = GetCurrentQuickFrame(); |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 204 | DCHECK(sp != NULL); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 205 | byte* pc_addr = reinterpret_cast<byte*>(sp) + GetMethod()->GetReturnPcOffsetInBytes(); |
| 206 | return *reinterpret_cast<uintptr_t*>(pc_addr); |
| 207 | } |
| 208 | |
| 209 | void StackVisitor::SetReturnPc(uintptr_t new_ret_pc) { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 210 | mirror::ArtMethod** sp = GetCurrentQuickFrame(); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 211 | CHECK(sp != NULL); |
| 212 | byte* pc_addr = reinterpret_cast<byte*>(sp) + GetMethod()->GetReturnPcOffsetInBytes(); |
| 213 | *reinterpret_cast<uintptr_t*>(pc_addr) = new_ret_pc; |
| 214 | } |
| 215 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 216 | size_t StackVisitor::ComputeNumFrames(Thread* thread) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 217 | struct NumFramesVisitor : public StackVisitor { |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 218 | explicit NumFramesVisitor(Thread* thread) |
| 219 | : StackVisitor(thread, NULL), frames(0) {} |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 220 | |
| 221 | virtual bool VisitFrame() { |
| 222 | frames++; |
| 223 | return true; |
| 224 | } |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 225 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 226 | size_t frames; |
| 227 | }; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 228 | NumFramesVisitor visitor(thread); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 229 | visitor.WalkStack(true); |
| 230 | return visitor.frames; |
| 231 | } |
| 232 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 233 | void StackVisitor::DescribeStack(Thread* thread) { |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 234 | struct DescribeStackVisitor : public StackVisitor { |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 235 | explicit DescribeStackVisitor(Thread* thread) |
| 236 | : StackVisitor(thread, NULL) {} |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 237 | |
| 238 | virtual bool VisitFrame() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 239 | LOG(INFO) << "Frame Id=" << GetFrameId() << " " << DescribeLocation(); |
| 240 | return true; |
| 241 | } |
| 242 | }; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 243 | DescribeStackVisitor visitor(thread); |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 244 | visitor.WalkStack(true); |
| 245 | } |
| 246 | |
Ian Rogers | 40e3bac | 2012-11-20 00:09:14 -0800 | [diff] [blame] | 247 | std::string StackVisitor::DescribeLocation() const { |
| 248 | std::string result("Visiting method '"); |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 249 | mirror::ArtMethod* m = GetMethod(); |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 250 | if (m == NULL) { |
| 251 | return "upcall"; |
| 252 | } |
| 253 | result += PrettyMethod(m); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 254 | result += StringPrintf("' at dex PC 0x%04x", GetDexPc()); |
Ian Rogers | 40e3bac | 2012-11-20 00:09:14 -0800 | [diff] [blame] | 255 | if (!IsShadowFrame()) { |
| 256 | result += StringPrintf(" (native PC %p)", reinterpret_cast<void*>(GetCurrentQuickFramePc())); |
| 257 | } |
| 258 | return result; |
| 259 | } |
| 260 | |
Sebastien Hertz | 74e256b | 2013-10-04 10:40:37 +0200 | [diff] [blame] | 261 | instrumentation::InstrumentationStackFrame& StackVisitor::GetInstrumentationStackFrame(uint32_t depth) const { |
Sebastien Hertz | 123756a | 2013-11-27 15:49:42 +0100 | [diff] [blame] | 262 | CHECK_LT(depth, thread_->GetInstrumentationStack()->size()); |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 263 | return thread_->GetInstrumentationStack()->at(depth); |
| 264 | } |
| 265 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 266 | void StackVisitor::SanityCheckFrame() const { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame^] | 267 | if (kIsDebugBuild) { |
| 268 | mirror::ArtMethod* method = GetMethod(); |
| 269 | CHECK(method->GetClass() == mirror::ArtMethod::GetJavaLangReflectArtMethod()); |
| 270 | if (cur_quick_frame_ != nullptr) { |
| 271 | method->AssertPcIsWithinQuickCode(cur_quick_frame_pc_); |
| 272 | // Frame sanity. |
| 273 | size_t frame_size = method->GetFrameSizeInBytes(); |
| 274 | CHECK_NE(frame_size, 0u); |
| 275 | // A rough guess at an upper size we expect to see for a frame. The 256 is |
| 276 | // a dex register limit. The 16 incorporates callee save spills and |
| 277 | // outgoing argument set up. |
| 278 | const size_t kMaxExpectedFrameSize = 256 * sizeof(word) + 16; |
| 279 | CHECK_LE(frame_size, kMaxExpectedFrameSize); |
| 280 | size_t return_pc_offset = method->GetReturnPcOffsetInBytes(); |
| 281 | CHECK_LT(return_pc_offset, frame_size); |
| 282 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 283 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | void StackVisitor::WalkStack(bool include_transitions) { |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 287 | DCHECK(thread_ == Thread::Current() || thread_->IsSuspended()); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 288 | CHECK_EQ(cur_depth_, 0U); |
| 289 | bool exit_stubs_installed = Runtime::Current()->GetInstrumentation()->AreExitStubsInstalled(); |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 290 | uint32_t instrumentation_stack_depth = 0; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 291 | for (const ManagedStack* current_fragment = thread_->GetManagedStack(); current_fragment != NULL; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 292 | current_fragment = current_fragment->GetLink()) { |
| 293 | cur_shadow_frame_ = current_fragment->GetTopShadowFrame(); |
| 294 | cur_quick_frame_ = current_fragment->GetTopQuickFrame(); |
| 295 | cur_quick_frame_pc_ = current_fragment->GetTopQuickFramePc(); |
| 296 | if (cur_quick_frame_ != NULL) { // Handle quick stack frames. |
| 297 | // Can't be both a shadow and a quick fragment. |
| 298 | DCHECK(current_fragment->GetTopShadowFrame() == NULL); |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 299 | mirror::ArtMethod* method = *cur_quick_frame_; |
jeffhao | 6641ea1 | 2013-01-02 18:13:42 -0800 | [diff] [blame] | 300 | while (method != NULL) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 301 | SanityCheckFrame(); |
| 302 | bool should_continue = VisitFrame(); |
| 303 | if (UNLIKELY(!should_continue)) { |
| 304 | return; |
| 305 | } |
| 306 | if (context_ != NULL) { |
| 307 | context_->FillCalleeSaves(*this); |
| 308 | } |
| 309 | size_t frame_size = method->GetFrameSizeInBytes(); |
| 310 | // Compute PC for next stack frame from return PC. |
| 311 | size_t return_pc_offset = method->GetReturnPcOffsetInBytes(); |
| 312 | byte* return_pc_addr = reinterpret_cast<byte*>(cur_quick_frame_) + return_pc_offset; |
| 313 | uintptr_t return_pc = *reinterpret_cast<uintptr_t*>(return_pc_addr); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 314 | if (UNLIKELY(exit_stubs_installed)) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 315 | // While profiling, the return pc is restored from the side stack, except when walking |
| 316 | // 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] | 317 | if (GetQuickInstrumentationExitPc() == return_pc) { |
Sebastien Hertz | 74e256b | 2013-10-04 10:40:37 +0200 | [diff] [blame] | 318 | const instrumentation::InstrumentationStackFrame& instrumentation_frame = |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 319 | GetInstrumentationStackFrame(instrumentation_stack_depth); |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 320 | instrumentation_stack_depth++; |
Jeff Hao | fb2802d | 2013-07-24 13:53:05 -0700 | [diff] [blame] | 321 | if (GetMethod() == Runtime::Current()->GetCalleeSaveMethod(Runtime::kSaveAll)) { |
| 322 | // Skip runtime save all callee frames which are used to deliver exceptions. |
| 323 | } else if (instrumentation_frame.interpreter_entry_) { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 324 | mirror::ArtMethod* callee = Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs); |
Jeff Hao | fb2802d | 2013-07-24 13:53:05 -0700 | [diff] [blame] | 325 | CHECK_EQ(GetMethod(), callee) << "Expected: " << PrettyMethod(callee) << " Found: " |
Sebastien Hertz | 138dbfc | 2013-12-04 18:15:25 +0100 | [diff] [blame] | 326 | << PrettyMethod(GetMethod()); |
Jeff Hao | 9a916d3 | 2013-06-27 18:45:37 -0700 | [diff] [blame] | 327 | } else if (instrumentation_frame.method_ != GetMethod()) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 328 | LOG(FATAL) << "Expected: " << PrettyMethod(instrumentation_frame.method_) |
Sebastien Hertz | 138dbfc | 2013-12-04 18:15:25 +0100 | [diff] [blame] | 329 | << " Found: " << PrettyMethod(GetMethod()); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 330 | } |
| 331 | if (num_frames_ != 0) { |
| 332 | // Check agreement of frame Ids only if num_frames_ is computed to avoid infinite |
| 333 | // recursion. |
| 334 | CHECK(instrumentation_frame.frame_id_ == GetFrameId()) |
| 335 | << "Expected: " << instrumentation_frame.frame_id_ |
| 336 | << " Found: " << GetFrameId(); |
| 337 | } |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 338 | return_pc = instrumentation_frame.return_pc_; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 339 | } |
| 340 | } |
| 341 | cur_quick_frame_pc_ = return_pc; |
| 342 | byte* next_frame = reinterpret_cast<byte*>(cur_quick_frame_) + frame_size; |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 343 | cur_quick_frame_ = reinterpret_cast<mirror::ArtMethod**>(next_frame); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 344 | cur_depth_++; |
| 345 | method = *cur_quick_frame_; |
jeffhao | 6641ea1 | 2013-01-02 18:13:42 -0800 | [diff] [blame] | 346 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 347 | } else if (cur_shadow_frame_ != NULL) { |
| 348 | do { |
| 349 | SanityCheckFrame(); |
| 350 | bool should_continue = VisitFrame(); |
| 351 | if (UNLIKELY(!should_continue)) { |
| 352 | return; |
| 353 | } |
| 354 | cur_depth_++; |
| 355 | cur_shadow_frame_ = cur_shadow_frame_->GetLink(); |
Brian Carlstrom | df62950 | 2013-07-17 22:39:56 -0700 | [diff] [blame] | 356 | } while (cur_shadow_frame_ != NULL); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 357 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 358 | if (include_transitions) { |
| 359 | bool should_continue = VisitFrame(); |
| 360 | if (!should_continue) { |
| 361 | return; |
| 362 | } |
| 363 | } |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 364 | cur_depth_++; |
| 365 | } |
| 366 | if (num_frames_ != 0) { |
| 367 | CHECK_EQ(cur_depth_, num_frames_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 368 | } |
| 369 | } |
| 370 | |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 371 | } // namespace art |