blob: e420c57346c7bf33d16fe8b5bbf453de25f700e4 [file] [log] [blame]
Elliott Hughes68e76522011-10-05 13:22:16 -07001/*
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 Rogerse63db272014-07-15 15:36:11 -070019#include "arch/context.h"
Dave Allisonf9439142014-03-27 15:10:22 -070020#include "base/hex_dump.h"
Ian Rogers6f3dbba2014-10-14 17:41:57 -070021#include "entrypoints/runtime_asm_entrypoints.h"
Brian Carlstromea46f952013-07-30 01:26:50 -070022#include "mirror/art_method-inl.h"
Ian Rogers4f6ad8a2013-03-18 15:27:28 -070023#include "mirror/class-inl.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080024#include "mirror/object.h"
25#include "mirror/object-inl.h"
26#include "mirror/object_array-inl.h"
Vladimir Marko7624d252014-05-02 14:40:15 +010027#include "quick/quick_method_frame_info.h"
Mathieu Chartier590fee92013-09-13 13:46:47 -070028#include "runtime.h"
Dave Allisonf9439142014-03-27 15:10:22 -070029#include "thread.h"
Elliott Hughesbfe487b2011-10-26 15:48:55 -070030#include "thread_list.h"
Mathieu Chartier4e305412014-02-19 10:54:44 -080031#include "verify_object-inl.h"
Ian Rogers1809a722013-08-09 22:05:32 -070032#include "vmap_table.h"
Elliott Hughes68e76522011-10-05 13:22:16 -070033
Elliott Hughes11d1b0c2012-01-23 16:57:47 -080034namespace art {
35
Ian Rogers62d6c772013-02-27 08:32:07 -080036mirror::Object* ShadowFrame::GetThisObject() const {
Brian Carlstromea46f952013-07-30 01:26:50 -070037 mirror::ArtMethod* m = GetMethod();
Ian Rogers62d6c772013-02-27 08:32:07 -080038 if (m->IsStatic()) {
39 return NULL;
40 } else if (m->IsNative()) {
41 return GetVRegReference(0);
42 } else {
Mathieu Chartierbfd9a432014-05-21 17:43:44 -070043 const DexFile::CodeItem* code_item = m->GetCodeItem();
Ian Rogers62d6c772013-02-27 08:32:07 -080044 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 Haoe701f482013-05-24 11:50:49 -070050mirror::Object* ShadowFrame::GetThisObject(uint16_t num_ins) const {
Brian Carlstromea46f952013-07-30 01:26:50 -070051 mirror::ArtMethod* m = GetMethod();
Jeff Haoe701f482013-05-24 11:50:49 -070052 if (m->IsStatic()) {
53 return NULL;
54 } else {
Jeff Hao8d448852013-06-03 17:26:19 -070055 return GetVRegReference(NumberOfVRegs() - num_ins);
Jeff Haoe701f482013-05-24 11:50:49 -070056 }
57}
58
TDYa127ce4cc0d2012-11-18 16:59:53 -080059size_t ManagedStack::NumJniShadowFrameReferences() const {
Ian Rogers0399dde2012-06-06 17:09:28 -070060 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()) {
TDYa127ce4cc0d2012-11-18 16:59:53 -080065 if (current_frame->GetMethod()->IsNative()) {
66 // The JNI ShadowFrame only contains references. (For indirect reference.)
67 count += current_frame->NumberOfVRegs();
68 }
Ian Rogers0399dde2012-06-06 17:09:28 -070069 }
70 }
71 return count;
72}
73
Ian Rogersef7d42f2014-01-06 12:55:46 -080074bool ManagedStack::ShadowFramesContain(StackReference<mirror::Object>* shadow_frame_entry) const {
Ian Rogers0399dde2012-06-06 17:09:28 -070075 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 Rogers7a22fa62013-01-23 12:16:16 -080087StackVisitor::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 Rogers62d6c772013-02-27 08:32:07 -080091 DCHECK(thread == Thread::Current() || thread->IsSuspended()) << *thread;
Ian Rogers7a22fa62013-01-23 12:16:16 -080092}
93
Ian Rogers5cf98192014-05-29 21:31:50 -070094StackVisitor::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 Allisonb373e092014-02-20 16:06:36 -0800101uint32_t StackVisitor::GetDexPc(bool abort_on_failure) const {
Ian Rogers0399dde2012-06-06 17:09:28 -0700102 if (cur_shadow_frame_ != NULL) {
103 return cur_shadow_frame_->GetDexPC();
104 } else if (cur_quick_frame_ != NULL) {
Dave Allisonb373e092014-02-20 16:06:36 -0800105 return GetMethod()->ToDexPc(cur_quick_frame_pc_, abort_on_failure);
Ian Rogers0399dde2012-06-06 17:09:28 -0700106 } else {
107 return 0;
108 }
109}
110
Sebastien Hertza836bc92014-11-25 16:30:53 +0100111extern "C" mirror::Object* artQuickGetProxyThisObject(StackReference<mirror::ArtMethod>* sp)
112 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
113
Ian Rogers62d6c772013-02-27 08:32:07 -0800114mirror::Object* StackVisitor::GetThisObject() const {
Brian Carlstromea46f952013-07-30 01:26:50 -0700115 mirror::ArtMethod* m = GetMethod();
Ian Rogers62d6c772013-02-27 08:32:07 -0800116 if (m->IsStatic()) {
Nicolas Geoffray39468442014-09-02 15:17:15 +0100117 return nullptr;
Ian Rogers62d6c772013-02-27 08:32:07 -0800118 } else if (m->IsNative()) {
Nicolas Geoffray39468442014-09-02 15:17:15 +0100119 if (cur_quick_frame_ != nullptr) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700120 HandleScope* hs = reinterpret_cast<HandleScope*>(
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700121 reinterpret_cast<char*>(cur_quick_frame_) + m->GetHandleScopeOffset().SizeValue());
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700122 return hs->GetReference(0);
Ian Rogers62d6c772013-02-27 08:32:07 -0800123 } else {
124 return cur_shadow_frame_->GetVRegReference(0);
125 }
Sebastien Hertza836bc92014-11-25 16:30:53 +0100126 } 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 }
Nicolas Geoffray9729e522015-03-03 12:44:53 +0000132 } else if (m->IsOptimized(GetInstructionSetPointerSize(
133 Runtime::Current()->GetInstructionSet()))) {
Nicolas Geoffray39468442014-09-02 15:17:15 +0100134 // TODO: Implement, currently only used for exceptions when jdwp is enabled.
Ian Rogers2c4257b2014-10-24 14:20:06 -0700135 UNIMPLEMENTED(WARNING)
136 << "StackVisitor::GetThisObject is unimplemented with the optimizing compiler";
Nicolas Geoffray39468442014-09-02 15:17:15 +0100137 return nullptr;
Ian Rogers62d6c772013-02-27 08:32:07 -0800138 } else {
Mathieu Chartierbfd9a432014-05-21 17:43:44 -0700139 const DexFile::CodeItem* code_item = m->GetCodeItem();
Nicolas Geoffray39468442014-09-02 15:17:15 +0100140 if (code_item == nullptr) {
Ian Rogerse0dcd462014-03-08 15:21:04 -0800141 UNIMPLEMENTED(ERROR) << "Failed to determine this object of abstract or proxy method: "
Ian Rogers62d6c772013-02-27 08:32:07 -0800142 << PrettyMethod(m);
Ian Rogerse0dcd462014-03-08 15:21:04 -0800143 return nullptr;
Ian Rogers62d6c772013-02-27 08:32:07 -0800144 } else {
145 uint16_t reg = code_item->registers_size_ - code_item->ins_size_;
146 return reinterpret_cast<mirror::Object*>(GetVReg(m, reg, kReferenceVReg));
147 }
148 }
149}
150
Ian Rogers0c7abda2012-09-19 13:33:42 -0700151size_t StackVisitor::GetNativePcOffset() const {
152 DCHECK(!IsShadowFrame());
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700153 return GetMethod()->NativeQuickPcOffset(cur_quick_frame_pc_);
Ian Rogers0c7abda2012-09-19 13:33:42 -0700154}
155
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200156bool StackVisitor::GetVReg(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind,
157 uint32_t* val) const {
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200158 if (cur_quick_frame_ != nullptr) {
159 DCHECK(context_ != nullptr); // You can't reliably read registers without a context.
Ian Rogers2bcb4a42012-11-08 10:39:18 -0800160 DCHECK(m == GetMethod());
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100161 if (m->IsOptimized(sizeof(void*))) {
162 return GetVRegFromOptimizedCode(m, vreg, kind, val);
Ian Rogers0ec569a2012-07-01 16:43:46 -0700163 } else {
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100164 return GetVRegFromQuickCode(m, vreg, kind, val);
Ian Rogers0399dde2012-06-06 17:09:28 -0700165 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700166 } else {
Sebastien Hertz96ba8dc2015-01-22 18:57:14 +0100167 DCHECK(cur_shadow_frame_ != nullptr);
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200168 *val = cur_shadow_frame_->GetVReg(vreg);
169 return true;
Ian Rogers0399dde2012-06-06 17:09:28 -0700170 }
171}
172
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100173bool StackVisitor::GetVRegFromQuickCode(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind,
174 uint32_t* val) const {
175 const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*));
176 DCHECK(code_pointer != nullptr);
177 const VmapTable vmap_table(m->GetVmapTable(code_pointer, sizeof(void*)));
178 QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer);
179 uint32_t vmap_offset;
180 // TODO: IsInContext stops before spotting floating point registers.
181 if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) {
182 bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg);
183 uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask();
184 uint32_t reg = vmap_table.ComputeRegister(spill_mask, vmap_offset, kind);
185 return GetRegisterIfAccessible(reg, kind, val);
186 } else {
187 const DexFile::CodeItem* code_item = m->GetCodeItem();
188 DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile
189 // its instructions?
190 *val = *GetVRegAddr(cur_quick_frame_, code_item, frame_info.CoreSpillMask(),
191 frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg);
192 return true;
193 }
194}
195
196bool StackVisitor::GetVRegFromOptimizedCode(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind,
197 uint32_t* val) const {
198 const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*));
199 DCHECK(code_pointer != nullptr);
200 uint32_t native_pc_offset = m->NativeQuickPcOffset(cur_quick_frame_pc_);
201 CodeInfo code_info = m->GetOptimizedCodeInfo();
202 StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset);
203 const DexFile::CodeItem* code_item = m->GetCodeItem();
204 DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile
205 // its instructions?
206 DCHECK_LT(vreg, code_item->registers_size_);
Roland Levillaina2d8ec62015-03-12 15:25:29 +0000207 DexRegisterMap dex_register_map =
208 code_info.GetDexRegisterMapOf(stack_map, code_item->registers_size_);
209 DexRegisterLocation::Kind location_kind = dex_register_map.GetLocationKind(vreg);
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100210 switch (location_kind) {
Roland Levillaina2d8ec62015-03-12 15:25:29 +0000211 case DexRegisterLocation::Kind::kInStack: {
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100212 const int32_t offset = dex_register_map.GetStackOffsetInBytes(vreg);
213 const uint8_t* addr = reinterpret_cast<const uint8_t*>(cur_quick_frame_) + offset;
214 *val = *reinterpret_cast<const uint32_t*>(addr);
215 return true;
216 }
Roland Levillaina2d8ec62015-03-12 15:25:29 +0000217 case DexRegisterLocation::Kind::kInRegister:
218 case DexRegisterLocation::Kind::kInFpuRegister: {
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100219 uint32_t reg = dex_register_map.GetMachineRegister(vreg);
220 return GetRegisterIfAccessible(reg, kind, val);
221 }
Roland Levillaina2d8ec62015-03-12 15:25:29 +0000222 case DexRegisterLocation::Kind::kConstant:
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100223 *val = dex_register_map.GetConstant(vreg);
224 return true;
Roland Levillaina2d8ec62015-03-12 15:25:29 +0000225 case DexRegisterLocation::Kind::kNone:
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100226 return false;
Roland Levillaina2d8ec62015-03-12 15:25:29 +0000227 default:
228 LOG(FATAL)
229 << "Unexpected location kind"
230 << DexRegisterLocation::PrettyDescriptor(dex_register_map.GetLocationInternalKind(vreg));
231 UNREACHABLE();
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100232 }
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100233}
234
235bool StackVisitor::GetRegisterIfAccessible(uint32_t reg, VRegKind kind, uint32_t* val) const {
236 const bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg);
237 if (!IsAccessibleRegister(reg, is_float)) {
238 return false;
239 }
240 uintptr_t ptr_val = GetRegister(reg, is_float);
241 const bool target64 = Is64BitInstructionSet(kRuntimeISA);
242 if (target64) {
243 const bool wide_lo = (kind == kLongLoVReg) || (kind == kDoubleLoVReg);
244 const bool wide_hi = (kind == kLongHiVReg) || (kind == kDoubleHiVReg);
245 int64_t value_long = static_cast<int64_t>(ptr_val);
246 if (wide_lo) {
247 ptr_val = static_cast<uintptr_t>(Low32Bits(value_long));
248 } else if (wide_hi) {
249 ptr_val = static_cast<uintptr_t>(High32Bits(value_long));
250 }
251 }
252 *val = ptr_val;
253 return true;
254}
255
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200256bool StackVisitor::GetVRegPair(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind_lo,
257 VRegKind kind_hi, uint64_t* val) const {
258 if (kind_lo == kLongLoVReg) {
259 DCHECK_EQ(kind_hi, kLongHiVReg);
260 } else if (kind_lo == kDoubleLoVReg) {
261 DCHECK_EQ(kind_hi, kDoubleHiVReg);
262 } else {
263 LOG(FATAL) << "Expected long or double: kind_lo=" << kind_lo << ", kind_hi=" << kind_hi;
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100264 UNREACHABLE();
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200265 }
266 if (cur_quick_frame_ != nullptr) {
267 DCHECK(context_ != nullptr); // You can't reliably read registers without a context.
268 DCHECK(m == GetMethod());
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100269 if (m->IsOptimized(sizeof(void*))) {
270 return GetVRegPairFromOptimizedCode(m, vreg, kind_lo, kind_hi, val);
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200271 } else {
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100272 return GetVRegPairFromQuickCode(m, vreg, kind_lo, kind_hi, val);
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200273 }
274 } else {
Sebastien Hertz96ba8dc2015-01-22 18:57:14 +0100275 DCHECK(cur_shadow_frame_ != nullptr);
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200276 *val = cur_shadow_frame_->GetVRegLong(vreg);
277 return true;
278 }
279}
280
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100281bool StackVisitor::GetVRegPairFromQuickCode(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind_lo,
282 VRegKind kind_hi, uint64_t* val) const {
283 const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*));
284 DCHECK(code_pointer != nullptr);
285 const VmapTable vmap_table(m->GetVmapTable(code_pointer, sizeof(void*)));
286 QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer);
287 uint32_t vmap_offset_lo, vmap_offset_hi;
288 // TODO: IsInContext stops before spotting floating point registers.
289 if (vmap_table.IsInContext(vreg, kind_lo, &vmap_offset_lo) &&
290 vmap_table.IsInContext(vreg + 1, kind_hi, &vmap_offset_hi)) {
291 bool is_float = (kind_lo == kDoubleLoVReg);
292 uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask();
293 uint32_t reg_lo = vmap_table.ComputeRegister(spill_mask, vmap_offset_lo, kind_lo);
294 uint32_t reg_hi = vmap_table.ComputeRegister(spill_mask, vmap_offset_hi, kind_hi);
295 return GetRegisterPairIfAccessible(reg_lo, reg_hi, kind_lo, val);
296 } else {
297 const DexFile::CodeItem* code_item = m->GetCodeItem();
298 DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile
299 // its instructions?
300 uint32_t* addr = GetVRegAddr(cur_quick_frame_, code_item, frame_info.CoreSpillMask(),
301 frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg);
302 *val = *reinterpret_cast<uint64_t*>(addr);
303 return true;
304 }
305}
306
307bool StackVisitor::GetVRegPairFromOptimizedCode(mirror::ArtMethod* m, uint16_t vreg,
308 VRegKind kind_lo, VRegKind kind_hi,
309 uint64_t* val) const {
310 uint32_t low_32bits;
311 uint32_t high_32bits;
312 bool success = GetVRegFromOptimizedCode(m, vreg, kind_lo, &low_32bits);
313 success &= GetVRegFromOptimizedCode(m, vreg + 1, kind_hi, &high_32bits);
314 if (success) {
315 *val = (static_cast<uint64_t>(high_32bits) << 32) | static_cast<uint64_t>(low_32bits);
316 }
317 return success;
318}
319
320bool StackVisitor::GetRegisterPairIfAccessible(uint32_t reg_lo, uint32_t reg_hi,
321 VRegKind kind_lo, uint64_t* val) const {
322 const bool is_float = (kind_lo == kDoubleLoVReg);
323 if (!IsAccessibleRegister(reg_lo, is_float) || !IsAccessibleRegister(reg_hi, is_float)) {
324 return false;
325 }
326 uintptr_t ptr_val_lo = GetRegister(reg_lo, is_float);
327 uintptr_t ptr_val_hi = GetRegister(reg_hi, is_float);
328 bool target64 = Is64BitInstructionSet(kRuntimeISA);
329 if (target64) {
330 int64_t value_long_lo = static_cast<int64_t>(ptr_val_lo);
331 int64_t value_long_hi = static_cast<int64_t>(ptr_val_hi);
332 ptr_val_lo = static_cast<uintptr_t>(Low32Bits(value_long_lo));
333 ptr_val_hi = static_cast<uintptr_t>(High32Bits(value_long_hi));
334 }
335 *val = (static_cast<uint64_t>(ptr_val_hi) << 32) | static_cast<uint32_t>(ptr_val_lo);
336 return true;
337}
338
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200339bool StackVisitor::SetVReg(mirror::ArtMethod* m, uint16_t vreg, uint32_t new_value,
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800340 VRegKind kind) {
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200341 if (cur_quick_frame_ != nullptr) {
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100342 DCHECK(context_ != nullptr); // You can't reliably write registers without a context.
343 DCHECK(m == GetMethod());
344 if (m->IsOptimized(sizeof(void*))) {
345 return SetVRegFromOptimizedCode(m, vreg, new_value, kind);
346 } else {
347 return SetVRegFromQuickCode(m, vreg, new_value, kind);
Sebastien Hertz96ba8dc2015-01-22 18:57:14 +0100348 }
Mathieu Chartier67022432012-11-29 18:04:50 -0800349 } else {
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100350 cur_shadow_frame_->SetVReg(vreg, new_value);
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200351 return true;
Ian Rogers0ec569a2012-07-01 16:43:46 -0700352 }
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100353}
354
355bool StackVisitor::SetVRegFromQuickCode(mirror::ArtMethod* m, uint16_t vreg, uint32_t new_value,
356 VRegKind kind) {
357 DCHECK(context_ != nullptr); // You can't reliably write registers without a context.
358 DCHECK(m == GetMethod());
359 const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*));
360 DCHECK(code_pointer != nullptr);
361 const VmapTable vmap_table(m->GetVmapTable(code_pointer, sizeof(void*)));
362 QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer);
363 uint32_t vmap_offset;
364 // TODO: IsInContext stops before spotting floating point registers.
365 if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) {
366 bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg);
367 uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask();
368 uint32_t reg = vmap_table.ComputeRegister(spill_mask, vmap_offset, kind);
369 return SetRegisterIfAccessible(reg, new_value, kind);
Ian Rogers0ec569a2012-07-01 16:43:46 -0700370 } else {
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100371 const DexFile::CodeItem* code_item = m->GetCodeItem();
372 DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile
373 // its instructions?
374 uint32_t* addr = GetVRegAddr(cur_quick_frame_, code_item, frame_info.CoreSpillMask(),
375 frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg);
376 *addr = new_value;
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200377 return true;
Ian Rogers0399dde2012-06-06 17:09:28 -0700378 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700379}
380
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100381bool 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 Levillaina2d8ec62015-03-12 15:25:29 +0000392 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 Hertz7cde48c2015-01-20 16:06:43 +0100395 uint32_t dex_pc = m->ToDexPc(cur_quick_frame_pc_, false);
396 switch (location_kind) {
Roland Levillaina2d8ec62015-03-12 15:25:29 +0000397 case DexRegisterLocation::Kind::kInStack: {
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100398 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 Levillaina2d8ec62015-03-12 15:25:29 +0000403 case DexRegisterLocation::Kind::kInRegister:
404 case DexRegisterLocation::Kind::kInFpuRegister: {
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100405 uint32_t reg = dex_register_map.GetMachineRegister(vreg);
406 return SetRegisterIfAccessible(reg, new_value, kind);
407 }
Roland Levillaina2d8ec62015-03-12 15:25:29 +0000408 case DexRegisterLocation::Kind::kConstant:
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100409 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 Levillaina2d8ec62015-03-12 15:25:29 +0000414 case DexRegisterLocation::Kind::kNone:
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100415 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
429bool 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 Hertzc901dd72014-07-16 11:56:07 +0200460bool 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 Hertz7cde48c2015-01-20 16:06:43 +0100472 if (m->IsOptimized(sizeof(void*))) {
473 return SetVRegPairFromOptimizedCode(m, vreg, new_value, kind_lo, kind_hi);
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200474 } else {
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100475 return SetVRegPairFromQuickCode(m, vreg, new_value, kind_lo, kind_hi);
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200476 }
477 } else {
Sebastien Hertz96ba8dc2015-01-22 18:57:14 +0100478 DCHECK(cur_shadow_frame_ != nullptr);
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200479 cur_shadow_frame_->SetVRegLong(vreg, new_value);
480 return true;
481 }
482}
483
Sebastien Hertz7cde48c2015-01-20 16:06:43 +0100484bool 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?
503 uint32_t* addr = GetVRegAddr(cur_quick_frame_, code_item, frame_info.CoreSpillMask(),
504 frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg);
505 *reinterpret_cast<uint64_t*>(addr) = new_value;
506 return true;
507 }
508}
509
510bool StackVisitor::SetVRegPairFromOptimizedCode(mirror::ArtMethod* m, uint16_t vreg, uint64_t new_value,
511 VRegKind kind_lo, VRegKind kind_hi) {
512 uint32_t low_32bits = Low32Bits(new_value);
513 uint32_t high_32bits = High32Bits(new_value);
514 bool success = SetVRegFromOptimizedCode(m, vreg, low_32bits, kind_lo);
515 success &= SetVRegFromOptimizedCode(m, vreg + 1, high_32bits, kind_hi);
516 return success;
517}
518
519bool StackVisitor::SetRegisterPairIfAccessible(uint32_t reg_lo, uint32_t reg_hi,
520 uint64_t new_value, bool is_float) {
521 if (!IsAccessibleRegister(reg_lo, is_float) || !IsAccessibleRegister(reg_hi, is_float)) {
522 return false;
523 }
524 uintptr_t new_value_lo = static_cast<uintptr_t>(new_value & 0xFFFFFFFF);
525 uintptr_t new_value_hi = static_cast<uintptr_t>(new_value >> 32);
526 bool target64 = Is64BitInstructionSet(kRuntimeISA);
527 // Deal with 32 or 64-bit wide registers in a way that builds on all targets.
528 if (target64) {
529 DCHECK_EQ(reg_lo, reg_hi);
530 SetRegister(reg_lo, new_value, is_float);
531 } else {
532 SetRegister(reg_lo, new_value_lo, is_float);
533 SetRegister(reg_hi, new_value_hi, is_float);
534 }
535 return true;
536}
537
Sebastien Hertz96ba8dc2015-01-22 18:57:14 +0100538bool StackVisitor::IsAccessibleGPR(uint32_t reg) const {
539 DCHECK(context_ != nullptr);
540 return context_->IsAccessibleGPR(reg);
541}
542
Mathieu Chartier815873e2014-02-13 18:02:13 -0800543uintptr_t* StackVisitor::GetGPRAddress(uint32_t reg) const {
Sebastien Hertz96ba8dc2015-01-22 18:57:14 +0100544 DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine";
545 DCHECK(context_ != nullptr);
Mathieu Chartier815873e2014-02-13 18:02:13 -0800546 return context_->GetGPRAddress(reg);
547}
548
Sebastien Hertz96ba8dc2015-01-22 18:57:14 +0100549uintptr_t StackVisitor::GetGPR(uint32_t reg) const {
550 DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine";
551 DCHECK(context_ != nullptr);
552 return context_->GetGPR(reg);
Ian Rogers0399dde2012-06-06 17:09:28 -0700553}
554
Sebastien Hertz96ba8dc2015-01-22 18:57:14 +0100555void StackVisitor::SetGPR(uint32_t reg, uintptr_t value) {
556 DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine";
557 DCHECK(context_ != nullptr);
558 context_->SetGPR(reg, value);
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200559}
560
Sebastien Hertz96ba8dc2015-01-22 18:57:14 +0100561bool StackVisitor::IsAccessibleFPR(uint32_t reg) const {
562 DCHECK(context_ != nullptr);
563 return context_->IsAccessibleFPR(reg);
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200564}
565
Sebastien Hertz96ba8dc2015-01-22 18:57:14 +0100566uintptr_t StackVisitor::GetFPR(uint32_t reg) const {
567 DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine";
568 DCHECK(context_ != nullptr);
569 return context_->GetFPR(reg);
570}
571
572void StackVisitor::SetFPR(uint32_t reg, uintptr_t value) {
573 DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine";
574 DCHECK(context_ != nullptr);
575 context_->SetFPR(reg, value);
Mathieu Chartier67022432012-11-29 18:04:50 -0800576}
577
Ian Rogers0399dde2012-06-06 17:09:28 -0700578uintptr_t StackVisitor::GetReturnPc() const {
Ian Rogers13735952014-10-08 12:43:28 -0700579 uint8_t* sp = reinterpret_cast<uint8_t*>(GetCurrentQuickFrame());
Ian Rogers2bcb4a42012-11-08 10:39:18 -0800580 DCHECK(sp != NULL);
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700581 uint8_t* pc_addr = sp + GetMethod()->GetReturnPcOffset().SizeValue();
Ian Rogers0399dde2012-06-06 17:09:28 -0700582 return *reinterpret_cast<uintptr_t*>(pc_addr);
583}
584
585void StackVisitor::SetReturnPc(uintptr_t new_ret_pc) {
Ian Rogers13735952014-10-08 12:43:28 -0700586 uint8_t* sp = reinterpret_cast<uint8_t*>(GetCurrentQuickFrame());
Ian Rogers0399dde2012-06-06 17:09:28 -0700587 CHECK(sp != NULL);
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700588 uint8_t* pc_addr = sp + GetMethod()->GetReturnPcOffset().SizeValue();
Ian Rogers0399dde2012-06-06 17:09:28 -0700589 *reinterpret_cast<uintptr_t*>(pc_addr) = new_ret_pc;
590}
591
Ian Rogers7a22fa62013-01-23 12:16:16 -0800592size_t StackVisitor::ComputeNumFrames(Thread* thread) {
Ian Rogers0399dde2012-06-06 17:09:28 -0700593 struct NumFramesVisitor : public StackVisitor {
Andreas Gampe277ccbd2014-11-03 21:36:10 -0800594 explicit NumFramesVisitor(Thread* thread_in)
595 : StackVisitor(thread_in, NULL), frames(0) {}
Ian Rogers0399dde2012-06-06 17:09:28 -0700596
Ian Rogers5cf98192014-05-29 21:31:50 -0700597 bool VisitFrame() OVERRIDE {
Ian Rogers0399dde2012-06-06 17:09:28 -0700598 frames++;
599 return true;
600 }
Elliott Hughes08fc03a2012-06-26 17:34:00 -0700601
Ian Rogers0399dde2012-06-06 17:09:28 -0700602 size_t frames;
603 };
Ian Rogers7a22fa62013-01-23 12:16:16 -0800604 NumFramesVisitor visitor(thread);
Ian Rogers0399dde2012-06-06 17:09:28 -0700605 visitor.WalkStack(true);
606 return visitor.frames;
607}
608
Ian Rogers5cf98192014-05-29 21:31:50 -0700609bool StackVisitor::GetNextMethodAndDexPc(mirror::ArtMethod** next_method, uint32_t* next_dex_pc) {
610 struct HasMoreFramesVisitor : public StackVisitor {
611 explicit HasMoreFramesVisitor(Thread* thread, size_t num_frames, size_t frame_height)
612 : StackVisitor(thread, nullptr, num_frames), frame_height_(frame_height),
613 found_frame_(false), has_more_frames_(false), next_method_(nullptr), next_dex_pc_(0) {
614 }
615
616 bool VisitFrame() OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
617 if (found_frame_) {
618 mirror::ArtMethod* method = GetMethod();
619 if (method != nullptr && !method->IsRuntimeMethod()) {
620 has_more_frames_ = true;
621 next_method_ = method;
622 next_dex_pc_ = GetDexPc();
623 return false; // End stack walk once next method is found.
624 }
625 } else if (GetFrameHeight() == frame_height_) {
626 found_frame_ = true;
627 }
628 return true;
629 }
630
631 size_t frame_height_;
632 bool found_frame_;
633 bool has_more_frames_;
634 mirror::ArtMethod* next_method_;
635 uint32_t next_dex_pc_;
636 };
637 HasMoreFramesVisitor visitor(thread_, GetNumFrames(), GetFrameHeight());
638 visitor.WalkStack(true);
639 *next_method = visitor.next_method_;
640 *next_dex_pc = visitor.next_dex_pc_;
641 return visitor.has_more_frames_;
642}
643
Ian Rogers7a22fa62013-01-23 12:16:16 -0800644void StackVisitor::DescribeStack(Thread* thread) {
Ian Rogers306057f2012-11-26 12:45:53 -0800645 struct DescribeStackVisitor : public StackVisitor {
Andreas Gampe277ccbd2014-11-03 21:36:10 -0800646 explicit DescribeStackVisitor(Thread* thread_in)
647 : StackVisitor(thread_in, NULL) {}
Ian Rogers306057f2012-11-26 12:45:53 -0800648
Ian Rogers5cf98192014-05-29 21:31:50 -0700649 bool VisitFrame() OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Ian Rogers306057f2012-11-26 12:45:53 -0800650 LOG(INFO) << "Frame Id=" << GetFrameId() << " " << DescribeLocation();
651 return true;
652 }
653 };
Ian Rogers7a22fa62013-01-23 12:16:16 -0800654 DescribeStackVisitor visitor(thread);
Ian Rogers306057f2012-11-26 12:45:53 -0800655 visitor.WalkStack(true);
656}
657
Ian Rogers40e3bac2012-11-20 00:09:14 -0800658std::string StackVisitor::DescribeLocation() const {
659 std::string result("Visiting method '");
Brian Carlstromea46f952013-07-30 01:26:50 -0700660 mirror::ArtMethod* m = GetMethod();
Ian Rogers306057f2012-11-26 12:45:53 -0800661 if (m == NULL) {
662 return "upcall";
663 }
664 result += PrettyMethod(m);
Ian Rogersef7d42f2014-01-06 12:55:46 -0800665 result += StringPrintf("' at dex PC 0x%04x", GetDexPc());
Ian Rogers40e3bac2012-11-20 00:09:14 -0800666 if (!IsShadowFrame()) {
667 result += StringPrintf(" (native PC %p)", reinterpret_cast<void*>(GetCurrentQuickFramePc()));
668 }
669 return result;
670}
671
Ian Rogerse63db272014-07-15 15:36:11 -0700672static instrumentation::InstrumentationStackFrame& GetInstrumentationStackFrame(Thread* thread,
673 uint32_t depth) {
674 CHECK_LT(depth, thread->GetInstrumentationStack()->size());
675 return thread->GetInstrumentationStack()->at(depth);
Ian Rogers7a22fa62013-01-23 12:16:16 -0800676}
677
Ian Rogers00f7d0e2012-07-19 15:28:27 -0700678void StackVisitor::SanityCheckFrame() const {
Ian Rogersef7d42f2014-01-06 12:55:46 -0800679 if (kIsDebugBuild) {
680 mirror::ArtMethod* method = GetMethod();
Mathieu Chartier119c6bd2014-05-09 14:11:47 -0700681 CHECK_EQ(method->GetClass(), mirror::ArtMethod::GetJavaLangReflectArtMethod());
Ian Rogersef7d42f2014-01-06 12:55:46 -0800682 if (cur_quick_frame_ != nullptr) {
683 method->AssertPcIsWithinQuickCode(cur_quick_frame_pc_);
684 // Frame sanity.
685 size_t frame_size = method->GetFrameSizeInBytes();
686 CHECK_NE(frame_size, 0u);
Andreas Gampe5b417b92014-03-10 14:18:35 -0700687 // A rough guess at an upper size we expect to see for a frame.
688 // 256 registers
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700689 // 2 words HandleScope overhead
Andreas Gampe5b417b92014-03-10 14:18:35 -0700690 // 3+3 register spills
691 // TODO: this seems architecture specific for the case of JNI frames.
Brian Carlstromed08bd42014-03-19 18:34:17 -0700692 // TODO: 083-compiler-regressions ManyFloatArgs shows this estimate is wrong.
693 // const size_t kMaxExpectedFrameSize = (256 + 2 + 3 + 3) * sizeof(word);
694 const size_t kMaxExpectedFrameSize = 2 * KB;
Ian Rogersef7d42f2014-01-06 12:55:46 -0800695 CHECK_LE(frame_size, kMaxExpectedFrameSize);
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700696 size_t return_pc_offset = method->GetReturnPcOffset().SizeValue();
Ian Rogersef7d42f2014-01-06 12:55:46 -0800697 CHECK_LT(return_pc_offset, frame_size);
698 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700699 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700700}
701
702void StackVisitor::WalkStack(bool include_transitions) {
Ian Rogers7a22fa62013-01-23 12:16:16 -0800703 DCHECK(thread_ == Thread::Current() || thread_->IsSuspended());
Ian Rogers62d6c772013-02-27 08:32:07 -0800704 CHECK_EQ(cur_depth_, 0U);
705 bool exit_stubs_installed = Runtime::Current()->GetInstrumentation()->AreExitStubsInstalled();
jeffhao725a9572012-11-13 18:20:12 -0800706 uint32_t instrumentation_stack_depth = 0;
Dave Allisonf9439142014-03-27 15:10:22 -0700707
Ian Rogers7a22fa62013-01-23 12:16:16 -0800708 for (const ManagedStack* current_fragment = thread_->GetManagedStack(); current_fragment != NULL;
Ian Rogers0399dde2012-06-06 17:09:28 -0700709 current_fragment = current_fragment->GetLink()) {
710 cur_shadow_frame_ = current_fragment->GetTopShadowFrame();
711 cur_quick_frame_ = current_fragment->GetTopQuickFrame();
Ian Rogers1d8cdbc2014-09-22 22:51:09 -0700712 cur_quick_frame_pc_ = 0;
Dave Allisonf9439142014-03-27 15:10:22 -0700713
Ian Rogers0399dde2012-06-06 17:09:28 -0700714 if (cur_quick_frame_ != NULL) { // Handle quick stack frames.
715 // Can't be both a shadow and a quick fragment.
716 DCHECK(current_fragment->GetTopShadowFrame() == NULL);
Andreas Gampecf4035a2014-05-28 22:43:01 -0700717 mirror::ArtMethod* method = cur_quick_frame_->AsMirrorPtr();
jeffhao6641ea12013-01-02 18:13:42 -0800718 while (method != NULL) {
Dave Allison5cd33752014-04-15 15:57:58 -0700719 SanityCheckFrame();
720 bool should_continue = VisitFrame();
721 if (UNLIKELY(!should_continue)) {
722 return;
Ian Rogers0399dde2012-06-06 17:09:28 -0700723 }
Dave Allison5cd33752014-04-15 15:57:58 -0700724
Ian Rogers0399dde2012-06-06 17:09:28 -0700725 if (context_ != NULL) {
726 context_->FillCalleeSaves(*this);
727 }
728 size_t frame_size = method->GetFrameSizeInBytes();
729 // Compute PC for next stack frame from return PC.
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700730 size_t return_pc_offset = method->GetReturnPcOffset(frame_size).SizeValue();
Ian Rogers13735952014-10-08 12:43:28 -0700731 uint8_t* return_pc_addr = reinterpret_cast<uint8_t*>(cur_quick_frame_) + return_pc_offset;
Ian Rogers0399dde2012-06-06 17:09:28 -0700732 uintptr_t return_pc = *reinterpret_cast<uintptr_t*>(return_pc_addr);
Ian Rogers62d6c772013-02-27 08:32:07 -0800733 if (UNLIKELY(exit_stubs_installed)) {
Ian Rogers0399dde2012-06-06 17:09:28 -0700734 // While profiling, the return pc is restored from the side stack, except when walking
735 // the stack for an exception where the side stack will be unwound in VisitFrame.
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700736 if (reinterpret_cast<uintptr_t>(GetQuickInstrumentationExitPc()) == return_pc) {
Sebastien Hertz74e256b2013-10-04 10:40:37 +0200737 const instrumentation::InstrumentationStackFrame& instrumentation_frame =
Ian Rogerse63db272014-07-15 15:36:11 -0700738 GetInstrumentationStackFrame(thread_, instrumentation_stack_depth);
jeffhao725a9572012-11-13 18:20:12 -0800739 instrumentation_stack_depth++;
Jeff Haofb2802d2013-07-24 13:53:05 -0700740 if (GetMethod() == Runtime::Current()->GetCalleeSaveMethod(Runtime::kSaveAll)) {
741 // Skip runtime save all callee frames which are used to deliver exceptions.
742 } else if (instrumentation_frame.interpreter_entry_) {
Brian Carlstromea46f952013-07-30 01:26:50 -0700743 mirror::ArtMethod* callee = Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs);
Jeff Haofb2802d2013-07-24 13:53:05 -0700744 CHECK_EQ(GetMethod(), callee) << "Expected: " << PrettyMethod(callee) << " Found: "
Sebastien Hertz138dbfc2013-12-04 18:15:25 +0100745 << PrettyMethod(GetMethod());
Jeff Hao9a916d32013-06-27 18:45:37 -0700746 } else if (instrumentation_frame.method_ != GetMethod()) {
Ian Rogers62d6c772013-02-27 08:32:07 -0800747 LOG(FATAL) << "Expected: " << PrettyMethod(instrumentation_frame.method_)
Sebastien Hertz138dbfc2013-12-04 18:15:25 +0100748 << " Found: " << PrettyMethod(GetMethod());
Ian Rogers62d6c772013-02-27 08:32:07 -0800749 }
750 if (num_frames_ != 0) {
751 // Check agreement of frame Ids only if num_frames_ is computed to avoid infinite
752 // recursion.
753 CHECK(instrumentation_frame.frame_id_ == GetFrameId())
754 << "Expected: " << instrumentation_frame.frame_id_
755 << " Found: " << GetFrameId();
756 }
jeffhao725a9572012-11-13 18:20:12 -0800757 return_pc = instrumentation_frame.return_pc_;
Ian Rogers0399dde2012-06-06 17:09:28 -0700758 }
759 }
760 cur_quick_frame_pc_ = return_pc;
Ian Rogers13735952014-10-08 12:43:28 -0700761 uint8_t* next_frame = reinterpret_cast<uint8_t*>(cur_quick_frame_) + frame_size;
Andreas Gampecf4035a2014-05-28 22:43:01 -0700762 cur_quick_frame_ = reinterpret_cast<StackReference<mirror::ArtMethod>*>(next_frame);
Ian Rogers0399dde2012-06-06 17:09:28 -0700763 cur_depth_++;
Andreas Gampecf4035a2014-05-28 22:43:01 -0700764 method = cur_quick_frame_->AsMirrorPtr();
jeffhao6641ea12013-01-02 18:13:42 -0800765 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700766 } else if (cur_shadow_frame_ != NULL) {
767 do {
768 SanityCheckFrame();
769 bool should_continue = VisitFrame();
770 if (UNLIKELY(!should_continue)) {
771 return;
772 }
773 cur_depth_++;
774 cur_shadow_frame_ = cur_shadow_frame_->GetLink();
Brian Carlstromdf629502013-07-17 22:39:56 -0700775 } while (cur_shadow_frame_ != NULL);
Ian Rogers0399dde2012-06-06 17:09:28 -0700776 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700777 if (include_transitions) {
778 bool should_continue = VisitFrame();
779 if (!should_continue) {
780 return;
781 }
782 }
Ian Rogers62d6c772013-02-27 08:32:07 -0800783 cur_depth_++;
784 }
785 if (num_frames_ != 0) {
786 CHECK_EQ(cur_depth_, num_frames_);
Ian Rogers0399dde2012-06-06 17:09:28 -0700787 }
788}
789
Mathieu Chartiere34fa1d2015-01-14 14:55:47 -0800790void JavaFrameRootInfo::Describe(std::ostream& os) const {
791 const StackVisitor* visitor = stack_visitor_;
792 CHECK(visitor != nullptr);
793 os << "Type=" << GetType() << " thread_id=" << GetThreadId() << " location=" <<
794 visitor->DescribeLocation() << " vreg=" << vreg_;
795}
796
Elliott Hughes68e76522011-10-05 13:22:16 -0700797} // namespace art