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" |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 26 | #include "runtime.h" |
Dave Allison | f943914 | 2014-03-27 15:10:22 -0700 | [diff] [blame] | 27 | #include "thread.h" |
Elliott Hughes | bfe487b | 2011-10-26 15:48:55 -0700 | [diff] [blame] | 28 | #include "thread_list.h" |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 29 | #include "throw_location.h" |
Mathieu Chartier | 4e30541 | 2014-02-19 10:54:44 -0800 | [diff] [blame] | 30 | #include "verify_object-inl.h" |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 31 | #include "vmap_table.h" |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 32 | |
Elliott Hughes | 11d1b0c | 2012-01-23 16:57:47 -0800 | [diff] [blame] | 33 | namespace art { |
| 34 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 35 | mirror::Object* ShadowFrame::GetThisObject() const { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 36 | mirror::ArtMethod* m = GetMethod(); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 37 | if (m->IsStatic()) { |
| 38 | return NULL; |
| 39 | } else if (m->IsNative()) { |
| 40 | return GetVRegReference(0); |
| 41 | } else { |
| 42 | const DexFile::CodeItem* code_item = MethodHelper(m).GetCodeItem(); |
| 43 | CHECK(code_item != NULL) << PrettyMethod(m); |
| 44 | uint16_t reg = code_item->registers_size_ - code_item->ins_size_; |
| 45 | return GetVRegReference(reg); |
| 46 | } |
| 47 | } |
| 48 | |
Jeff Hao | e701f48 | 2013-05-24 11:50:49 -0700 | [diff] [blame] | 49 | mirror::Object* ShadowFrame::GetThisObject(uint16_t num_ins) const { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 50 | mirror::ArtMethod* m = GetMethod(); |
Jeff Hao | e701f48 | 2013-05-24 11:50:49 -0700 | [diff] [blame] | 51 | if (m->IsStatic()) { |
| 52 | return NULL; |
| 53 | } else { |
Jeff Hao | 8d44885 | 2013-06-03 17:26:19 -0700 | [diff] [blame] | 54 | return GetVRegReference(NumberOfVRegs() - num_ins); |
Jeff Hao | e701f48 | 2013-05-24 11:50:49 -0700 | [diff] [blame] | 55 | } |
| 56 | } |
| 57 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 58 | ThrowLocation ShadowFrame::GetCurrentLocationForThrow() const { |
| 59 | return ThrowLocation(GetThisObject(), GetMethod(), GetDexPC()); |
| 60 | } |
| 61 | |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 62 | size_t ManagedStack::NumJniShadowFrameReferences() const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 63 | size_t count = 0; |
| 64 | for (const ManagedStack* current_fragment = this; current_fragment != NULL; |
| 65 | current_fragment = current_fragment->GetLink()) { |
| 66 | for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_; current_frame != NULL; |
| 67 | current_frame = current_frame->GetLink()) { |
TDYa127 | ce4cc0d | 2012-11-18 16:59:53 -0800 | [diff] [blame] | 68 | if (current_frame->GetMethod()->IsNative()) { |
| 69 | // The JNI ShadowFrame only contains references. (For indirect reference.) |
| 70 | count += current_frame->NumberOfVRegs(); |
| 71 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 72 | } |
| 73 | } |
| 74 | return count; |
| 75 | } |
| 76 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 77 | bool ManagedStack::ShadowFramesContain(StackReference<mirror::Object>* shadow_frame_entry) const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 78 | for (const ManagedStack* current_fragment = this; current_fragment != NULL; |
| 79 | current_fragment = current_fragment->GetLink()) { |
| 80 | for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_; current_frame != NULL; |
| 81 | current_frame = current_frame->GetLink()) { |
| 82 | if (current_frame->Contains(shadow_frame_entry)) { |
| 83 | return true; |
| 84 | } |
| 85 | } |
| 86 | } |
| 87 | return false; |
| 88 | } |
| 89 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 90 | StackVisitor::StackVisitor(Thread* thread, Context* context) |
| 91 | : thread_(thread), cur_shadow_frame_(NULL), |
| 92 | cur_quick_frame_(NULL), cur_quick_frame_pc_(0), num_frames_(0), cur_depth_(0), |
| 93 | context_(context) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 94 | DCHECK(thread == Thread::Current() || thread->IsSuspended()) << *thread; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 95 | } |
| 96 | |
Dave Allison | b373e09 | 2014-02-20 16:06:36 -0800 | [diff] [blame] | 97 | uint32_t StackVisitor::GetDexPc(bool abort_on_failure) const { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 98 | if (cur_shadow_frame_ != NULL) { |
| 99 | return cur_shadow_frame_->GetDexPC(); |
| 100 | } else if (cur_quick_frame_ != NULL) { |
Dave Allison | b373e09 | 2014-02-20 16:06:36 -0800 | [diff] [blame] | 101 | return GetMethod()->ToDexPc(cur_quick_frame_pc_, abort_on_failure); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 102 | } else { |
| 103 | return 0; |
| 104 | } |
| 105 | } |
| 106 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 107 | mirror::Object* StackVisitor::GetThisObject() const { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 108 | mirror::ArtMethod* m = GetMethod(); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 109 | if (m->IsStatic()) { |
| 110 | return NULL; |
| 111 | } else if (m->IsNative()) { |
| 112 | if (cur_quick_frame_ != NULL) { |
Andreas Gampe | 36fea8d | 2014-03-10 13:37:40 -0700 | [diff] [blame] | 113 | StackIndirectReferenceTable* sirt = |
| 114 | reinterpret_cast<StackIndirectReferenceTable*>( |
| 115 | reinterpret_cast<char*>(cur_quick_frame_) + |
| 116 | m->GetSirtOffsetInBytes()); |
| 117 | return sirt->GetReference(0); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 118 | } else { |
| 119 | return cur_shadow_frame_->GetVRegReference(0); |
| 120 | } |
| 121 | } else { |
| 122 | const DexFile::CodeItem* code_item = MethodHelper(m).GetCodeItem(); |
| 123 | if (code_item == NULL) { |
Ian Rogers | e0dcd46 | 2014-03-08 15:21:04 -0800 | [diff] [blame] | 124 | UNIMPLEMENTED(ERROR) << "Failed to determine this object of abstract or proxy method: " |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 125 | << PrettyMethod(m); |
Ian Rogers | e0dcd46 | 2014-03-08 15:21:04 -0800 | [diff] [blame] | 126 | return nullptr; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 127 | } else { |
| 128 | uint16_t reg = code_item->registers_size_ - code_item->ins_size_; |
| 129 | return reinterpret_cast<mirror::Object*>(GetVReg(m, reg, kReferenceVReg)); |
| 130 | } |
| 131 | } |
| 132 | } |
| 133 | |
Ian Rogers | 0c7abda | 2012-09-19 13:33:42 -0700 | [diff] [blame] | 134 | size_t StackVisitor::GetNativePcOffset() const { |
| 135 | DCHECK(!IsShadowFrame()); |
| 136 | return GetMethod()->NativePcOffset(cur_quick_frame_pc_); |
| 137 | } |
| 138 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 139 | 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] | 140 | if (cur_quick_frame_ != NULL) { |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 141 | DCHECK(context_ != NULL); // You can't reliably read registers without a context. |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 142 | DCHECK(m == GetMethod()); |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 143 | const VmapTable vmap_table(m->GetVmapTable()); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 144 | uint32_t vmap_offset; |
| 145 | // TODO: IsInContext stops before spotting floating point registers. |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 146 | if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) { |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 147 | bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
| 148 | uint32_t spill_mask = is_float ? m->GetFpSpillMask() |
| 149 | : m->GetCoreSpillMask(); |
| 150 | return GetGPR(vmap_table.ComputeRegister(spill_mask, vmap_offset, kind)); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 151 | } else { |
| 152 | const DexFile::CodeItem* code_item = MethodHelper(m).GetCodeItem(); |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 153 | 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] | 154 | size_t frame_size = m->GetFrameSizeInBytes(); |
Mathieu Chartier | 423d2a3 | 2013-09-12 17:33:56 -0700 | [diff] [blame] | 155 | return *GetVRegAddr(cur_quick_frame_, code_item, m->GetCoreSpillMask(), m->GetFpSpillMask(), |
| 156 | frame_size, vreg); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 157 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 158 | } else { |
TDYa127 | 8e950c1 | 2012-11-02 09:58:19 -0700 | [diff] [blame] | 159 | return cur_shadow_frame_->GetVReg(vreg); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 160 | } |
| 161 | } |
| 162 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 163 | 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] | 164 | VRegKind kind) { |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 165 | if (cur_quick_frame_ != NULL) { |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 166 | DCHECK(context_ != NULL); // You can't reliably write registers without a context. |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 167 | DCHECK(m == GetMethod()); |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 168 | const VmapTable vmap_table(m->GetVmapTable()); |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 169 | uint32_t vmap_offset; |
| 170 | // TODO: IsInContext stops before spotting floating point registers. |
Ian Rogers | 1809a72 | 2013-08-09 22:05:32 -0700 | [diff] [blame] | 171 | if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) { |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 172 | bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg); |
| 173 | uint32_t spill_mask = is_float ? m->GetFpSpillMask() : m->GetCoreSpillMask(); |
| 174 | const uint32_t reg = vmap_table.ComputeRegister(spill_mask, vmap_offset, kReferenceVReg); |
| 175 | SetGPR(reg, new_value); |
| 176 | } else { |
| 177 | const DexFile::CodeItem* code_item = MethodHelper(m).GetCodeItem(); |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 178 | 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] | 179 | uint32_t core_spills = m->GetCoreSpillMask(); |
| 180 | uint32_t fp_spills = m->GetFpSpillMask(); |
| 181 | size_t frame_size = m->GetFrameSizeInBytes(); |
Nicolas Geoffray | 42fcd98 | 2014-04-22 11:03:52 +0000 | [diff] [blame] | 182 | int offset = GetVRegOffset(code_item, core_spills, fp_spills, frame_size, vreg, kRuntimeISA); |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 183 | byte* vreg_addr = reinterpret_cast<byte*>(GetCurrentQuickFrame()) + offset; |
| 184 | *reinterpret_cast<uint32_t*>(vreg_addr) = new_value; |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 185 | } |
Ian Rogers | 0ec569a | 2012-07-01 16:43:46 -0700 | [diff] [blame] | 186 | } else { |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 187 | return cur_shadow_frame_->SetVReg(vreg, new_value); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 188 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 189 | } |
| 190 | |
Mathieu Chartier | 815873e | 2014-02-13 18:02:13 -0800 | [diff] [blame] | 191 | uintptr_t* StackVisitor::GetGPRAddress(uint32_t reg) const { |
| 192 | DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine"; |
| 193 | return context_->GetGPRAddress(reg); |
| 194 | } |
| 195 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 196 | uintptr_t StackVisitor::GetGPR(uint32_t reg) const { |
Brian Carlstrom | df62950 | 2013-07-17 22:39:56 -0700 | [diff] [blame] | 197 | DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine"; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 198 | return context_->GetGPR(reg); |
| 199 | } |
| 200 | |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 201 | void StackVisitor::SetGPR(uint32_t reg, uintptr_t value) { |
Brian Carlstrom | df62950 | 2013-07-17 22:39:56 -0700 | [diff] [blame] | 202 | DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine"; |
Mathieu Chartier | 6702243 | 2012-11-29 18:04:50 -0800 | [diff] [blame] | 203 | context_->SetGPR(reg, value); |
| 204 | } |
| 205 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 206 | uintptr_t StackVisitor::GetReturnPc() const { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 207 | mirror::ArtMethod** sp = GetCurrentQuickFrame(); |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 208 | DCHECK(sp != NULL); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 209 | byte* pc_addr = reinterpret_cast<byte*>(sp) + GetMethod()->GetReturnPcOffsetInBytes(); |
| 210 | return *reinterpret_cast<uintptr_t*>(pc_addr); |
| 211 | } |
| 212 | |
| 213 | void StackVisitor::SetReturnPc(uintptr_t new_ret_pc) { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 214 | mirror::ArtMethod** sp = GetCurrentQuickFrame(); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 215 | CHECK(sp != NULL); |
| 216 | byte* pc_addr = reinterpret_cast<byte*>(sp) + GetMethod()->GetReturnPcOffsetInBytes(); |
| 217 | *reinterpret_cast<uintptr_t*>(pc_addr) = new_ret_pc; |
| 218 | } |
| 219 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 220 | size_t StackVisitor::ComputeNumFrames(Thread* thread) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 221 | struct NumFramesVisitor : public StackVisitor { |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 222 | explicit NumFramesVisitor(Thread* thread) |
| 223 | : StackVisitor(thread, NULL), frames(0) {} |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 224 | |
| 225 | virtual bool VisitFrame() { |
| 226 | frames++; |
| 227 | return true; |
| 228 | } |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 229 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 230 | size_t frames; |
| 231 | }; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 232 | NumFramesVisitor visitor(thread); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 233 | visitor.WalkStack(true); |
| 234 | return visitor.frames; |
| 235 | } |
| 236 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 237 | void StackVisitor::DescribeStack(Thread* thread) { |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 238 | struct DescribeStackVisitor : public StackVisitor { |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 239 | explicit DescribeStackVisitor(Thread* thread) |
| 240 | : StackVisitor(thread, NULL) {} |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 241 | |
| 242 | virtual bool VisitFrame() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 243 | LOG(INFO) << "Frame Id=" << GetFrameId() << " " << DescribeLocation(); |
| 244 | return true; |
| 245 | } |
| 246 | }; |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 247 | DescribeStackVisitor visitor(thread); |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 248 | visitor.WalkStack(true); |
| 249 | } |
| 250 | |
Ian Rogers | 40e3bac | 2012-11-20 00:09:14 -0800 | [diff] [blame] | 251 | std::string StackVisitor::DescribeLocation() const { |
| 252 | std::string result("Visiting method '"); |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 253 | mirror::ArtMethod* m = GetMethod(); |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 254 | if (m == NULL) { |
| 255 | return "upcall"; |
| 256 | } |
| 257 | result += PrettyMethod(m); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 258 | result += StringPrintf("' at dex PC 0x%04x", GetDexPc()); |
Ian Rogers | 40e3bac | 2012-11-20 00:09:14 -0800 | [diff] [blame] | 259 | if (!IsShadowFrame()) { |
| 260 | result += StringPrintf(" (native PC %p)", reinterpret_cast<void*>(GetCurrentQuickFramePc())); |
| 261 | } |
| 262 | return result; |
| 263 | } |
| 264 | |
Sebastien Hertz | 74e256b | 2013-10-04 10:40:37 +0200 | [diff] [blame] | 265 | instrumentation::InstrumentationStackFrame& StackVisitor::GetInstrumentationStackFrame(uint32_t depth) const { |
Sebastien Hertz | 123756a | 2013-11-27 15:49:42 +0100 | [diff] [blame] | 266 | CHECK_LT(depth, thread_->GetInstrumentationStack()->size()); |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 267 | return thread_->GetInstrumentationStack()->at(depth); |
| 268 | } |
| 269 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 270 | void StackVisitor::SanityCheckFrame() const { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 271 | if (kIsDebugBuild) { |
| 272 | mirror::ArtMethod* method = GetMethod(); |
| 273 | CHECK(method->GetClass() == mirror::ArtMethod::GetJavaLangReflectArtMethod()); |
| 274 | if (cur_quick_frame_ != nullptr) { |
| 275 | method->AssertPcIsWithinQuickCode(cur_quick_frame_pc_); |
| 276 | // Frame sanity. |
| 277 | size_t frame_size = method->GetFrameSizeInBytes(); |
| 278 | CHECK_NE(frame_size, 0u); |
Andreas Gampe | 5b417b9 | 2014-03-10 14:18:35 -0700 | [diff] [blame] | 279 | // A rough guess at an upper size we expect to see for a frame. |
| 280 | // 256 registers |
| 281 | // 2 words Sirt overhead |
| 282 | // 3+3 register spills |
| 283 | // TODO: this seems architecture specific for the case of JNI frames. |
Brian Carlstrom | ed08bd4 | 2014-03-19 18:34:17 -0700 | [diff] [blame] | 284 | // TODO: 083-compiler-regressions ManyFloatArgs shows this estimate is wrong. |
| 285 | // const size_t kMaxExpectedFrameSize = (256 + 2 + 3 + 3) * sizeof(word); |
| 286 | const size_t kMaxExpectedFrameSize = 2 * KB; |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 287 | CHECK_LE(frame_size, kMaxExpectedFrameSize); |
| 288 | size_t return_pc_offset = method->GetReturnPcOffsetInBytes(); |
| 289 | CHECK_LT(return_pc_offset, frame_size); |
| 290 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 291 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | void StackVisitor::WalkStack(bool include_transitions) { |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 295 | DCHECK(thread_ == Thread::Current() || thread_->IsSuspended()); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 296 | CHECK_EQ(cur_depth_, 0U); |
| 297 | bool exit_stubs_installed = Runtime::Current()->GetInstrumentation()->AreExitStubsInstalled(); |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 298 | uint32_t instrumentation_stack_depth = 0; |
Dave Allison | f943914 | 2014-03-27 15:10:22 -0700 | [diff] [blame] | 299 | |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 300 | for (const ManagedStack* current_fragment = thread_->GetManagedStack(); current_fragment != NULL; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 301 | current_fragment = current_fragment->GetLink()) { |
| 302 | cur_shadow_frame_ = current_fragment->GetTopShadowFrame(); |
| 303 | cur_quick_frame_ = current_fragment->GetTopQuickFrame(); |
| 304 | cur_quick_frame_pc_ = current_fragment->GetTopQuickFramePc(); |
Dave Allison | f943914 | 2014-03-27 15:10:22 -0700 | [diff] [blame] | 305 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 306 | if (cur_quick_frame_ != NULL) { // Handle quick stack frames. |
| 307 | // Can't be both a shadow and a quick fragment. |
| 308 | DCHECK(current_fragment->GetTopShadowFrame() == NULL); |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 309 | mirror::ArtMethod* method = *cur_quick_frame_; |
jeffhao | 6641ea1 | 2013-01-02 18:13:42 -0800 | [diff] [blame] | 310 | while (method != NULL) { |
Dave Allison | 5cd3375 | 2014-04-15 15:57:58 -0700 | [diff] [blame^] | 311 | SanityCheckFrame(); |
| 312 | bool should_continue = VisitFrame(); |
| 313 | if (UNLIKELY(!should_continue)) { |
| 314 | return; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 315 | } |
Dave Allison | 5cd3375 | 2014-04-15 15:57:58 -0700 | [diff] [blame^] | 316 | |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 317 | if (context_ != NULL) { |
| 318 | context_->FillCalleeSaves(*this); |
| 319 | } |
| 320 | size_t frame_size = method->GetFrameSizeInBytes(); |
| 321 | // Compute PC for next stack frame from return PC. |
| 322 | size_t return_pc_offset = method->GetReturnPcOffsetInBytes(); |
| 323 | byte* return_pc_addr = reinterpret_cast<byte*>(cur_quick_frame_) + return_pc_offset; |
| 324 | uintptr_t return_pc = *reinterpret_cast<uintptr_t*>(return_pc_addr); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 325 | if (UNLIKELY(exit_stubs_installed)) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 326 | // While profiling, the return pc is restored from the side stack, except when walking |
| 327 | // 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] | 328 | if (GetQuickInstrumentationExitPc() == return_pc) { |
Sebastien Hertz | 74e256b | 2013-10-04 10:40:37 +0200 | [diff] [blame] | 329 | const instrumentation::InstrumentationStackFrame& instrumentation_frame = |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 330 | GetInstrumentationStackFrame(instrumentation_stack_depth); |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 331 | instrumentation_stack_depth++; |
Jeff Hao | fb2802d | 2013-07-24 13:53:05 -0700 | [diff] [blame] | 332 | if (GetMethod() == Runtime::Current()->GetCalleeSaveMethod(Runtime::kSaveAll)) { |
| 333 | // Skip runtime save all callee frames which are used to deliver exceptions. |
| 334 | } else if (instrumentation_frame.interpreter_entry_) { |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 335 | mirror::ArtMethod* callee = Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs); |
Jeff Hao | fb2802d | 2013-07-24 13:53:05 -0700 | [diff] [blame] | 336 | CHECK_EQ(GetMethod(), callee) << "Expected: " << PrettyMethod(callee) << " Found: " |
Sebastien Hertz | 138dbfc | 2013-12-04 18:15:25 +0100 | [diff] [blame] | 337 | << PrettyMethod(GetMethod()); |
Jeff Hao | 9a916d3 | 2013-06-27 18:45:37 -0700 | [diff] [blame] | 338 | } else if (instrumentation_frame.method_ != GetMethod()) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 339 | LOG(FATAL) << "Expected: " << PrettyMethod(instrumentation_frame.method_) |
Sebastien Hertz | 138dbfc | 2013-12-04 18:15:25 +0100 | [diff] [blame] | 340 | << " Found: " << PrettyMethod(GetMethod()); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 341 | } |
| 342 | if (num_frames_ != 0) { |
| 343 | // Check agreement of frame Ids only if num_frames_ is computed to avoid infinite |
| 344 | // recursion. |
| 345 | CHECK(instrumentation_frame.frame_id_ == GetFrameId()) |
| 346 | << "Expected: " << instrumentation_frame.frame_id_ |
| 347 | << " Found: " << GetFrameId(); |
| 348 | } |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 349 | return_pc = instrumentation_frame.return_pc_; |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 350 | } |
| 351 | } |
| 352 | cur_quick_frame_pc_ = return_pc; |
| 353 | byte* next_frame = reinterpret_cast<byte*>(cur_quick_frame_) + frame_size; |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 354 | cur_quick_frame_ = reinterpret_cast<mirror::ArtMethod**>(next_frame); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 355 | cur_depth_++; |
| 356 | method = *cur_quick_frame_; |
jeffhao | 6641ea1 | 2013-01-02 18:13:42 -0800 | [diff] [blame] | 357 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 358 | } else if (cur_shadow_frame_ != NULL) { |
| 359 | do { |
| 360 | SanityCheckFrame(); |
| 361 | bool should_continue = VisitFrame(); |
| 362 | if (UNLIKELY(!should_continue)) { |
| 363 | return; |
| 364 | } |
| 365 | cur_depth_++; |
| 366 | cur_shadow_frame_ = cur_shadow_frame_->GetLink(); |
Brian Carlstrom | df62950 | 2013-07-17 22:39:56 -0700 | [diff] [blame] | 367 | } while (cur_shadow_frame_ != NULL); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 368 | } |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 369 | if (include_transitions) { |
| 370 | bool should_continue = VisitFrame(); |
| 371 | if (!should_continue) { |
| 372 | return; |
| 373 | } |
| 374 | } |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 375 | cur_depth_++; |
| 376 | } |
| 377 | if (num_frames_ != 0) { |
| 378 | CHECK_EQ(cur_depth_, num_frames_); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 379 | } |
| 380 | } |
| 381 | |
Elliott Hughes | 68e7652 | 2011-10-05 13:22:16 -0700 | [diff] [blame] | 382 | } // namespace art |