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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"
Ian Rogers62d6c772013-02-27 08:32:07 -080031#include "throw_location.h"
Mathieu Chartier4e305412014-02-19 10:54:44 -080032#include "verify_object-inl.h"
Ian Rogers1809a722013-08-09 22:05:32 -070033#include "vmap_table.h"
Elliott Hughes68e76522011-10-05 13:22:16 -070034
Elliott Hughes11d1b0c2012-01-23 16:57:47 -080035namespace art {
36
Ian Rogers62d6c772013-02-27 08:32:07 -080037mirror::Object* ShadowFrame::GetThisObject() const {
Brian Carlstromea46f952013-07-30 01:26:50 -070038 mirror::ArtMethod* m = GetMethod();
Ian Rogers62d6c772013-02-27 08:32:07 -080039 if (m->IsStatic()) {
40 return NULL;
41 } else if (m->IsNative()) {
42 return GetVRegReference(0);
43 } else {
Mathieu Chartierbfd9a432014-05-21 17:43:44 -070044 const DexFile::CodeItem* code_item = m->GetCodeItem();
Ian Rogers62d6c772013-02-27 08:32:07 -080045 CHECK(code_item != NULL) << PrettyMethod(m);
46 uint16_t reg = code_item->registers_size_ - code_item->ins_size_;
47 return GetVRegReference(reg);
48 }
49}
50
Jeff Haoe701f482013-05-24 11:50:49 -070051mirror::Object* ShadowFrame::GetThisObject(uint16_t num_ins) const {
Brian Carlstromea46f952013-07-30 01:26:50 -070052 mirror::ArtMethod* m = GetMethod();
Jeff Haoe701f482013-05-24 11:50:49 -070053 if (m->IsStatic()) {
54 return NULL;
55 } else {
Jeff Hao8d448852013-06-03 17:26:19 -070056 return GetVRegReference(NumberOfVRegs() - num_ins);
Jeff Haoe701f482013-05-24 11:50:49 -070057 }
58}
59
Ian Rogers62d6c772013-02-27 08:32:07 -080060ThrowLocation ShadowFrame::GetCurrentLocationForThrow() const {
61 return ThrowLocation(GetThisObject(), GetMethod(), GetDexPC());
62}
63
TDYa127ce4cc0d2012-11-18 16:59:53 -080064size_t ManagedStack::NumJniShadowFrameReferences() const {
Ian Rogers0399dde2012-06-06 17:09:28 -070065 size_t count = 0;
66 for (const ManagedStack* current_fragment = this; current_fragment != NULL;
67 current_fragment = current_fragment->GetLink()) {
68 for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_; current_frame != NULL;
69 current_frame = current_frame->GetLink()) {
TDYa127ce4cc0d2012-11-18 16:59:53 -080070 if (current_frame->GetMethod()->IsNative()) {
71 // The JNI ShadowFrame only contains references. (For indirect reference.)
72 count += current_frame->NumberOfVRegs();
73 }
Ian Rogers0399dde2012-06-06 17:09:28 -070074 }
75 }
76 return count;
77}
78
Ian Rogersef7d42f2014-01-06 12:55:46 -080079bool ManagedStack::ShadowFramesContain(StackReference<mirror::Object>* shadow_frame_entry) const {
Ian Rogers0399dde2012-06-06 17:09:28 -070080 for (const ManagedStack* current_fragment = this; current_fragment != NULL;
81 current_fragment = current_fragment->GetLink()) {
82 for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_; current_frame != NULL;
83 current_frame = current_frame->GetLink()) {
84 if (current_frame->Contains(shadow_frame_entry)) {
85 return true;
86 }
87 }
88 }
89 return false;
90}
91
Ian Rogers7a22fa62013-01-23 12:16:16 -080092StackVisitor::StackVisitor(Thread* thread, Context* context)
93 : thread_(thread), cur_shadow_frame_(NULL),
94 cur_quick_frame_(NULL), cur_quick_frame_pc_(0), num_frames_(0), cur_depth_(0),
95 context_(context) {
Ian Rogers62d6c772013-02-27 08:32:07 -080096 DCHECK(thread == Thread::Current() || thread->IsSuspended()) << *thread;
Ian Rogers7a22fa62013-01-23 12:16:16 -080097}
98
Ian Rogers5cf98192014-05-29 21:31:50 -070099StackVisitor::StackVisitor(Thread* thread, Context* context, size_t num_frames)
100 : thread_(thread), cur_shadow_frame_(NULL),
101 cur_quick_frame_(NULL), cur_quick_frame_pc_(0), num_frames_(num_frames), cur_depth_(0),
102 context_(context) {
103 DCHECK(thread == Thread::Current() || thread->IsSuspended()) << *thread;
104}
105
Dave Allisonb373e092014-02-20 16:06:36 -0800106uint32_t StackVisitor::GetDexPc(bool abort_on_failure) const {
Ian Rogers0399dde2012-06-06 17:09:28 -0700107 if (cur_shadow_frame_ != NULL) {
108 return cur_shadow_frame_->GetDexPC();
109 } else if (cur_quick_frame_ != NULL) {
Dave Allisonb373e092014-02-20 16:06:36 -0800110 return GetMethod()->ToDexPc(cur_quick_frame_pc_, abort_on_failure);
Ian Rogers0399dde2012-06-06 17:09:28 -0700111 } else {
112 return 0;
113 }
114}
115
Sebastien Hertza836bc92014-11-25 16:30:53 +0100116extern "C" mirror::Object* artQuickGetProxyThisObject(StackReference<mirror::ArtMethod>* sp)
117 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
118
Ian Rogers62d6c772013-02-27 08:32:07 -0800119mirror::Object* StackVisitor::GetThisObject() const {
Brian Carlstromea46f952013-07-30 01:26:50 -0700120 mirror::ArtMethod* m = GetMethod();
Ian Rogers62d6c772013-02-27 08:32:07 -0800121 if (m->IsStatic()) {
Nicolas Geoffray39468442014-09-02 15:17:15 +0100122 return nullptr;
Ian Rogers62d6c772013-02-27 08:32:07 -0800123 } else if (m->IsNative()) {
Nicolas Geoffray39468442014-09-02 15:17:15 +0100124 if (cur_quick_frame_ != nullptr) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700125 HandleScope* hs = reinterpret_cast<HandleScope*>(
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700126 reinterpret_cast<char*>(cur_quick_frame_) + m->GetHandleScopeOffset().SizeValue());
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700127 return hs->GetReference(0);
Ian Rogers62d6c772013-02-27 08:32:07 -0800128 } else {
129 return cur_shadow_frame_->GetVRegReference(0);
130 }
Sebastien Hertza836bc92014-11-25 16:30:53 +0100131 } else if (m->IsProxyMethod()) {
132 if (cur_quick_frame_ != nullptr) {
133 return artQuickGetProxyThisObject(cur_quick_frame_);
134 } else {
135 return cur_shadow_frame_->GetVRegReference(0);
136 }
Mathieu Chartiera7dd0382014-11-20 17:08:58 -0800137 } else if (m->IsOptimized(sizeof(void*))) {
Nicolas Geoffray39468442014-09-02 15:17:15 +0100138 // TODO: Implement, currently only used for exceptions when jdwp is enabled.
Ian Rogers2c4257b2014-10-24 14:20:06 -0700139 UNIMPLEMENTED(WARNING)
140 << "StackVisitor::GetThisObject is unimplemented with the optimizing compiler";
Nicolas Geoffray39468442014-09-02 15:17:15 +0100141 return nullptr;
Ian Rogers62d6c772013-02-27 08:32:07 -0800142 } else {
Mathieu Chartierbfd9a432014-05-21 17:43:44 -0700143 const DexFile::CodeItem* code_item = m->GetCodeItem();
Nicolas Geoffray39468442014-09-02 15:17:15 +0100144 if (code_item == nullptr) {
Ian Rogerse0dcd462014-03-08 15:21:04 -0800145 UNIMPLEMENTED(ERROR) << "Failed to determine this object of abstract or proxy method: "
Ian Rogers62d6c772013-02-27 08:32:07 -0800146 << PrettyMethod(m);
Ian Rogerse0dcd462014-03-08 15:21:04 -0800147 return nullptr;
Ian Rogers62d6c772013-02-27 08:32:07 -0800148 } else {
149 uint16_t reg = code_item->registers_size_ - code_item->ins_size_;
150 return reinterpret_cast<mirror::Object*>(GetVReg(m, reg, kReferenceVReg));
151 }
152 }
153}
154
Ian Rogers0c7abda2012-09-19 13:33:42 -0700155size_t StackVisitor::GetNativePcOffset() const {
156 DCHECK(!IsShadowFrame());
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700157 return GetMethod()->NativeQuickPcOffset(cur_quick_frame_pc_);
Ian Rogers0c7abda2012-09-19 13:33:42 -0700158}
159
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200160bool StackVisitor::GetVReg(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind,
161 uint32_t* val) const {
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200162 if (cur_quick_frame_ != nullptr) {
163 DCHECK(context_ != nullptr); // You can't reliably read registers without a context.
Ian Rogers2bcb4a42012-11-08 10:39:18 -0800164 DCHECK(m == GetMethod());
Mathieu Chartiera7dd0382014-11-20 17:08:58 -0800165 const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*));
Vladimir Marko4c1c5102014-05-14 16:51:16 +0100166 DCHECK(code_pointer != nullptr);
Mathieu Chartiera7dd0382014-11-20 17:08:58 -0800167 const VmapTable vmap_table(m->GetVmapTable(code_pointer, sizeof(void*)));
Vladimir Marko4c1c5102014-05-14 16:51:16 +0100168 QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer);
Ian Rogers0ec569a2012-07-01 16:43:46 -0700169 uint32_t vmap_offset;
170 // TODO: IsInContext stops before spotting floating point registers.
Ian Rogers1809a722013-08-09 22:05:32 -0700171 if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) {
Ian Rogers2bcb4a42012-11-08 10:39:18 -0800172 bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg);
Vladimir Marko7624d252014-05-02 14:40:15 +0100173 uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask();
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200174 uint32_t reg = vmap_table.ComputeRegister(spill_mask, vmap_offset, kind);
175 uintptr_t ptr_val;
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200176 bool success = is_float ? GetFPR(reg, &ptr_val) : GetGPR(reg, &ptr_val);
177 if (!success) {
178 return false;
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200179 }
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200180 bool target64 = Is64BitInstructionSet(kRuntimeISA);
181 if (target64) {
buzbeeb5860fb2014-06-21 15:31:01 -0700182 bool wide_lo = (kind == kLongLoVReg) || (kind == kDoubleLoVReg);
183 bool wide_hi = (kind == kLongHiVReg) || (kind == kDoubleHiVReg);
184 int64_t value_long = static_cast<int64_t>(ptr_val);
185 if (wide_lo) {
186 ptr_val = static_cast<uintptr_t>(value_long & 0xFFFFFFFF);
187 } else if (wide_hi) {
188 ptr_val = static_cast<uintptr_t>(value_long >> 32);
189 }
190 }
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200191 *val = ptr_val;
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200192 return true;
Ian Rogers0ec569a2012-07-01 16:43:46 -0700193 } else {
Mathieu Chartierbfd9a432014-05-21 17:43:44 -0700194 const DexFile::CodeItem* code_item = m->GetCodeItem();
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200195 DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile
196 // its instructions?
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200197 *val = *GetVRegAddr(cur_quick_frame_, code_item, frame_info.CoreSpillMask(),
Vladimir Marko7624d252014-05-02 14:40:15 +0100198 frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg);
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200199 return true;
Ian Rogers0399dde2012-06-06 17:09:28 -0700200 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700201 } else {
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200202 *val = cur_shadow_frame_->GetVReg(vreg);
203 return true;
Ian Rogers0399dde2012-06-06 17:09:28 -0700204 }
205}
206
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200207bool StackVisitor::GetVRegPair(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind_lo,
208 VRegKind kind_hi, uint64_t* val) const {
209 if (kind_lo == kLongLoVReg) {
210 DCHECK_EQ(kind_hi, kLongHiVReg);
211 } else if (kind_lo == kDoubleLoVReg) {
212 DCHECK_EQ(kind_hi, kDoubleHiVReg);
213 } else {
214 LOG(FATAL) << "Expected long or double: kind_lo=" << kind_lo << ", kind_hi=" << kind_hi;
215 }
216 if (cur_quick_frame_ != nullptr) {
217 DCHECK(context_ != nullptr); // You can't reliably read registers without a context.
218 DCHECK(m == GetMethod());
Mathieu Chartiera7dd0382014-11-20 17:08:58 -0800219 const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*));
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200220 DCHECK(code_pointer != nullptr);
Mathieu Chartiera7dd0382014-11-20 17:08:58 -0800221 const VmapTable vmap_table(m->GetVmapTable(code_pointer, sizeof(void*)));
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200222 QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer);
223 uint32_t vmap_offset_lo, vmap_offset_hi;
224 // TODO: IsInContext stops before spotting floating point registers.
225 if (vmap_table.IsInContext(vreg, kind_lo, &vmap_offset_lo) &&
226 vmap_table.IsInContext(vreg + 1, kind_hi, &vmap_offset_hi)) {
227 bool is_float = (kind_lo == kDoubleLoVReg);
228 uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask();
229 uint32_t reg_lo = vmap_table.ComputeRegister(spill_mask, vmap_offset_lo, kind_lo);
230 uint32_t reg_hi = vmap_table.ComputeRegister(spill_mask, vmap_offset_hi, kind_hi);
231 uintptr_t ptr_val_lo, ptr_val_hi;
232 bool success = is_float ? GetFPR(reg_lo, &ptr_val_lo) : GetGPR(reg_lo, &ptr_val_lo);
233 success &= is_float ? GetFPR(reg_hi, &ptr_val_hi) : GetGPR(reg_hi, &ptr_val_hi);
234 if (!success) {
235 return false;
236 }
237 bool target64 = Is64BitInstructionSet(kRuntimeISA);
238 if (target64) {
239 int64_t value_long_lo = static_cast<int64_t>(ptr_val_lo);
240 int64_t value_long_hi = static_cast<int64_t>(ptr_val_hi);
241 ptr_val_lo = static_cast<uintptr_t>(value_long_lo & 0xFFFFFFFF);
242 ptr_val_hi = static_cast<uintptr_t>(value_long_hi >> 32);
243 }
244 *val = (static_cast<uint64_t>(ptr_val_hi) << 32) | static_cast<uint32_t>(ptr_val_lo);
245 return true;
246 } else {
247 const DexFile::CodeItem* code_item = m->GetCodeItem();
248 DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile
249 // its instructions?
250 uint32_t* addr = GetVRegAddr(cur_quick_frame_, code_item, frame_info.CoreSpillMask(),
251 frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg);
252 *val = *reinterpret_cast<uint64_t*>(addr);
253 return true;
254 }
255 } else {
256 *val = cur_shadow_frame_->GetVRegLong(vreg);
257 return true;
258 }
259}
260
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200261bool StackVisitor::SetVReg(mirror::ArtMethod* m, uint16_t vreg, uint32_t new_value,
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800262 VRegKind kind) {
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200263 if (cur_quick_frame_ != nullptr) {
264 DCHECK(context_ != nullptr); // You can't reliably write registers without a context.
Ian Rogers0ec569a2012-07-01 16:43:46 -0700265 DCHECK(m == GetMethod());
Mathieu Chartiera7dd0382014-11-20 17:08:58 -0800266 const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*));
Vladimir Marko4c1c5102014-05-14 16:51:16 +0100267 DCHECK(code_pointer != nullptr);
Mathieu Chartiera7dd0382014-11-20 17:08:58 -0800268 const VmapTable vmap_table(m->GetVmapTable(code_pointer, sizeof(void*)));
Vladimir Marko4c1c5102014-05-14 16:51:16 +0100269 QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer);
Ian Rogers0ec569a2012-07-01 16:43:46 -0700270 uint32_t vmap_offset;
271 // TODO: IsInContext stops before spotting floating point registers.
Ian Rogers1809a722013-08-09 22:05:32 -0700272 if (vmap_table.IsInContext(vreg, kind, &vmap_offset)) {
Mathieu Chartier67022432012-11-29 18:04:50 -0800273 bool is_float = (kind == kFloatVReg) || (kind == kDoubleLoVReg) || (kind == kDoubleHiVReg);
Vladimir Marko7624d252014-05-02 14:40:15 +0100274 uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask();
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200275 const uint32_t reg = vmap_table.ComputeRegister(spill_mask, vmap_offset, kind);
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200276 bool target64 = Is64BitInstructionSet(kRuntimeISA);
buzbeeb5860fb2014-06-21 15:31:01 -0700277 // Deal with 32 or 64-bit wide registers in a way that builds on all targets.
278 if (target64) {
279 bool wide_lo = (kind == kLongLoVReg) || (kind == kDoubleLoVReg);
280 bool wide_hi = (kind == kLongHiVReg) || (kind == kDoubleHiVReg);
281 if (wide_lo || wide_hi) {
282 uintptr_t old_reg_val;
283 bool success = is_float ? GetFPR(reg, &old_reg_val) : GetGPR(reg, &old_reg_val);
284 if (!success) {
285 return false;
286 }
287 uint64_t new_vreg_portion = static_cast<uint64_t>(new_value);
288 uint64_t old_reg_val_as_wide = static_cast<uint64_t>(old_reg_val);
289 uint64_t mask = 0xffffffff;
290 if (wide_lo) {
291 mask = mask << 32;
292 } else {
293 new_vreg_portion = new_vreg_portion << 32;
294 }
295 new_value = static_cast<uintptr_t>((old_reg_val_as_wide & mask) | new_vreg_portion);
296 }
297 }
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200298 if (is_float) {
299 return SetFPR(reg, new_value);
300 } else {
301 return SetGPR(reg, new_value);
302 }
Mathieu Chartier67022432012-11-29 18:04:50 -0800303 } else {
Mathieu Chartierbfd9a432014-05-21 17:43:44 -0700304 const DexFile::CodeItem* code_item = m->GetCodeItem();
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200305 DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile
306 // its instructions?
307 uint32_t* addr = GetVRegAddr(cur_quick_frame_, code_item, frame_info.CoreSpillMask(),
308 frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg);
309 *addr = new_value;
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200310 return true;
Ian Rogers0ec569a2012-07-01 16:43:46 -0700311 }
Ian Rogers0ec569a2012-07-01 16:43:46 -0700312 } else {
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200313 cur_shadow_frame_->SetVReg(vreg, new_value);
314 return true;
Ian Rogers0399dde2012-06-06 17:09:28 -0700315 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700316}
317
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200318bool StackVisitor::SetVRegPair(mirror::ArtMethod* m, uint16_t vreg, uint64_t new_value,
319 VRegKind kind_lo, VRegKind kind_hi) {
320 if (kind_lo == kLongLoVReg) {
321 DCHECK_EQ(kind_hi, kLongHiVReg);
322 } else if (kind_lo == kDoubleLoVReg) {
323 DCHECK_EQ(kind_hi, kDoubleHiVReg);
324 } else {
325 LOG(FATAL) << "Expected long or double: kind_lo=" << kind_lo << ", kind_hi=" << kind_hi;
326 }
327 if (cur_quick_frame_ != nullptr) {
328 DCHECK(context_ != nullptr); // You can't reliably write registers without a context.
329 DCHECK(m == GetMethod());
Mathieu Chartiera7dd0382014-11-20 17:08:58 -0800330 const void* code_pointer = m->GetQuickOatCodePointer(sizeof(void*));
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200331 DCHECK(code_pointer != nullptr);
Mathieu Chartiera7dd0382014-11-20 17:08:58 -0800332 const VmapTable vmap_table(m->GetVmapTable(code_pointer, sizeof(void*)));
Sebastien Hertzc901dd72014-07-16 11:56:07 +0200333 QuickMethodFrameInfo frame_info = m->GetQuickFrameInfo(code_pointer);
334 uint32_t vmap_offset_lo, vmap_offset_hi;
335 // TODO: IsInContext stops before spotting floating point registers.
336 if (vmap_table.IsInContext(vreg, kind_lo, &vmap_offset_lo) &&
337 vmap_table.IsInContext(vreg + 1, kind_hi, &vmap_offset_hi)) {
338 bool is_float = (kind_lo == kDoubleLoVReg);
339 uint32_t spill_mask = is_float ? frame_info.FpSpillMask() : frame_info.CoreSpillMask();
340 uint32_t reg_lo = vmap_table.ComputeRegister(spill_mask, vmap_offset_lo, kind_lo);
341 uint32_t reg_hi = vmap_table.ComputeRegister(spill_mask, vmap_offset_hi, kind_hi);
342 uintptr_t new_value_lo = static_cast<uintptr_t>(new_value & 0xFFFFFFFF);
343 uintptr_t new_value_hi = static_cast<uintptr_t>(new_value >> 32);
344 bool target64 = Is64BitInstructionSet(kRuntimeISA);
345 // Deal with 32 or 64-bit wide registers in a way that builds on all targets.
346 if (target64) {
347 uintptr_t old_reg_val_lo, old_reg_val_hi;
348 bool success = is_float ? GetFPR(reg_lo, &old_reg_val_lo) : GetGPR(reg_lo, &old_reg_val_lo);
349 success &= is_float ? GetFPR(reg_hi, &old_reg_val_hi) : GetGPR(reg_hi, &old_reg_val_hi);
350 if (!success) {
351 return false;
352 }
353 uint64_t new_vreg_portion_lo = static_cast<uint64_t>(new_value_lo);
354 uint64_t new_vreg_portion_hi = static_cast<uint64_t>(new_value_hi) << 32;
355 uint64_t old_reg_val_lo_as_wide = static_cast<uint64_t>(old_reg_val_lo);
356 uint64_t old_reg_val_hi_as_wide = static_cast<uint64_t>(old_reg_val_hi);
357 uint64_t mask_lo = static_cast<uint64_t>(0xffffffff) << 32;
358 uint64_t mask_hi = 0xffffffff;
359 new_value_lo = static_cast<uintptr_t>((old_reg_val_lo_as_wide & mask_lo) | new_vreg_portion_lo);
360 new_value_hi = static_cast<uintptr_t>((old_reg_val_hi_as_wide & mask_hi) | new_vreg_portion_hi);
361 }
362 bool success = is_float ? SetFPR(reg_lo, new_value_lo) : SetGPR(reg_lo, new_value_lo);
363 success &= is_float ? SetFPR(reg_hi, new_value_hi) : SetGPR(reg_hi, new_value_hi);
364 return success;
365 } else {
366 const DexFile::CodeItem* code_item = m->GetCodeItem();
367 DCHECK(code_item != nullptr) << PrettyMethod(m); // Can't be NULL or how would we compile
368 // its instructions?
369 uint32_t* addr = GetVRegAddr(cur_quick_frame_, code_item, frame_info.CoreSpillMask(),
370 frame_info.FpSpillMask(), frame_info.FrameSizeInBytes(), vreg);
371 *reinterpret_cast<uint64_t*>(addr) = new_value;
372 return true;
373 }
374 } else {
375 cur_shadow_frame_->SetVRegLong(vreg, new_value);
376 return true;
377 }
378}
379
Mathieu Chartier815873e2014-02-13 18:02:13 -0800380uintptr_t* StackVisitor::GetGPRAddress(uint32_t reg) const {
381 DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine";
382 return context_->GetGPRAddress(reg);
383}
384
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200385bool StackVisitor::GetGPR(uint32_t reg, uintptr_t* val) const {
Brian Carlstromdf629502013-07-17 22:39:56 -0700386 DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine";
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200387 return context_->GetGPR(reg, val);
Ian Rogers0399dde2012-06-06 17:09:28 -0700388}
389
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200390bool StackVisitor::SetGPR(uint32_t reg, uintptr_t value) {
Brian Carlstromdf629502013-07-17 22:39:56 -0700391 DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine";
Sebastien Hertz0bcb2902014-06-17 15:52:45 +0200392 return context_->SetGPR(reg, value);
393}
394
395bool StackVisitor::GetFPR(uint32_t reg, uintptr_t* val) const {
396 DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine";
397 return context_->GetFPR(reg, val);
398}
399
400bool StackVisitor::SetFPR(uint32_t reg, uintptr_t value) {
401 DCHECK(cur_quick_frame_ != NULL) << "This is a quick frame routine";
402 return context_->SetFPR(reg, value);
Mathieu Chartier67022432012-11-29 18:04:50 -0800403}
404
Ian Rogers0399dde2012-06-06 17:09:28 -0700405uintptr_t StackVisitor::GetReturnPc() const {
Ian Rogers13735952014-10-08 12:43:28 -0700406 uint8_t* sp = reinterpret_cast<uint8_t*>(GetCurrentQuickFrame());
Ian Rogers2bcb4a42012-11-08 10:39:18 -0800407 DCHECK(sp != NULL);
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700408 uint8_t* pc_addr = sp + GetMethod()->GetReturnPcOffset().SizeValue();
Ian Rogers0399dde2012-06-06 17:09:28 -0700409 return *reinterpret_cast<uintptr_t*>(pc_addr);
410}
411
412void StackVisitor::SetReturnPc(uintptr_t new_ret_pc) {
Ian Rogers13735952014-10-08 12:43:28 -0700413 uint8_t* sp = reinterpret_cast<uint8_t*>(GetCurrentQuickFrame());
Ian Rogers0399dde2012-06-06 17:09:28 -0700414 CHECK(sp != NULL);
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700415 uint8_t* pc_addr = sp + GetMethod()->GetReturnPcOffset().SizeValue();
Ian Rogers0399dde2012-06-06 17:09:28 -0700416 *reinterpret_cast<uintptr_t*>(pc_addr) = new_ret_pc;
417}
418
Ian Rogers7a22fa62013-01-23 12:16:16 -0800419size_t StackVisitor::ComputeNumFrames(Thread* thread) {
Ian Rogers0399dde2012-06-06 17:09:28 -0700420 struct NumFramesVisitor : public StackVisitor {
Andreas Gampe277ccbd2014-11-03 21:36:10 -0800421 explicit NumFramesVisitor(Thread* thread_in)
422 : StackVisitor(thread_in, NULL), frames(0) {}
Ian Rogers0399dde2012-06-06 17:09:28 -0700423
Ian Rogers5cf98192014-05-29 21:31:50 -0700424 bool VisitFrame() OVERRIDE {
Ian Rogers0399dde2012-06-06 17:09:28 -0700425 frames++;
426 return true;
427 }
Elliott Hughes08fc03a2012-06-26 17:34:00 -0700428
Ian Rogers0399dde2012-06-06 17:09:28 -0700429 size_t frames;
430 };
Ian Rogers7a22fa62013-01-23 12:16:16 -0800431 NumFramesVisitor visitor(thread);
Ian Rogers0399dde2012-06-06 17:09:28 -0700432 visitor.WalkStack(true);
433 return visitor.frames;
434}
435
Ian Rogers5cf98192014-05-29 21:31:50 -0700436bool StackVisitor::GetNextMethodAndDexPc(mirror::ArtMethod** next_method, uint32_t* next_dex_pc) {
437 struct HasMoreFramesVisitor : public StackVisitor {
438 explicit HasMoreFramesVisitor(Thread* thread, size_t num_frames, size_t frame_height)
439 : StackVisitor(thread, nullptr, num_frames), frame_height_(frame_height),
440 found_frame_(false), has_more_frames_(false), next_method_(nullptr), next_dex_pc_(0) {
441 }
442
443 bool VisitFrame() OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
444 if (found_frame_) {
445 mirror::ArtMethod* method = GetMethod();
446 if (method != nullptr && !method->IsRuntimeMethod()) {
447 has_more_frames_ = true;
448 next_method_ = method;
449 next_dex_pc_ = GetDexPc();
450 return false; // End stack walk once next method is found.
451 }
452 } else if (GetFrameHeight() == frame_height_) {
453 found_frame_ = true;
454 }
455 return true;
456 }
457
458 size_t frame_height_;
459 bool found_frame_;
460 bool has_more_frames_;
461 mirror::ArtMethod* next_method_;
462 uint32_t next_dex_pc_;
463 };
464 HasMoreFramesVisitor visitor(thread_, GetNumFrames(), GetFrameHeight());
465 visitor.WalkStack(true);
466 *next_method = visitor.next_method_;
467 *next_dex_pc = visitor.next_dex_pc_;
468 return visitor.has_more_frames_;
469}
470
Ian Rogers7a22fa62013-01-23 12:16:16 -0800471void StackVisitor::DescribeStack(Thread* thread) {
Ian Rogers306057f2012-11-26 12:45:53 -0800472 struct DescribeStackVisitor : public StackVisitor {
Andreas Gampe277ccbd2014-11-03 21:36:10 -0800473 explicit DescribeStackVisitor(Thread* thread_in)
474 : StackVisitor(thread_in, NULL) {}
Ian Rogers306057f2012-11-26 12:45:53 -0800475
Ian Rogers5cf98192014-05-29 21:31:50 -0700476 bool VisitFrame() OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Ian Rogers306057f2012-11-26 12:45:53 -0800477 LOG(INFO) << "Frame Id=" << GetFrameId() << " " << DescribeLocation();
478 return true;
479 }
480 };
Ian Rogers7a22fa62013-01-23 12:16:16 -0800481 DescribeStackVisitor visitor(thread);
Ian Rogers306057f2012-11-26 12:45:53 -0800482 visitor.WalkStack(true);
483}
484
Ian Rogers40e3bac2012-11-20 00:09:14 -0800485std::string StackVisitor::DescribeLocation() const {
486 std::string result("Visiting method '");
Brian Carlstromea46f952013-07-30 01:26:50 -0700487 mirror::ArtMethod* m = GetMethod();
Ian Rogers306057f2012-11-26 12:45:53 -0800488 if (m == NULL) {
489 return "upcall";
490 }
491 result += PrettyMethod(m);
Ian Rogersef7d42f2014-01-06 12:55:46 -0800492 result += StringPrintf("' at dex PC 0x%04x", GetDexPc());
Ian Rogers40e3bac2012-11-20 00:09:14 -0800493 if (!IsShadowFrame()) {
494 result += StringPrintf(" (native PC %p)", reinterpret_cast<void*>(GetCurrentQuickFramePc()));
495 }
496 return result;
497}
498
Ian Rogerse63db272014-07-15 15:36:11 -0700499static instrumentation::InstrumentationStackFrame& GetInstrumentationStackFrame(Thread* thread,
500 uint32_t depth) {
501 CHECK_LT(depth, thread->GetInstrumentationStack()->size());
502 return thread->GetInstrumentationStack()->at(depth);
Ian Rogers7a22fa62013-01-23 12:16:16 -0800503}
504
Ian Rogers00f7d0e2012-07-19 15:28:27 -0700505void StackVisitor::SanityCheckFrame() const {
Ian Rogersef7d42f2014-01-06 12:55:46 -0800506 if (kIsDebugBuild) {
507 mirror::ArtMethod* method = GetMethod();
Mathieu Chartier119c6bd2014-05-09 14:11:47 -0700508 CHECK_EQ(method->GetClass(), mirror::ArtMethod::GetJavaLangReflectArtMethod());
Ian Rogersef7d42f2014-01-06 12:55:46 -0800509 if (cur_quick_frame_ != nullptr) {
510 method->AssertPcIsWithinQuickCode(cur_quick_frame_pc_);
511 // Frame sanity.
512 size_t frame_size = method->GetFrameSizeInBytes();
513 CHECK_NE(frame_size, 0u);
Andreas Gampe5b417b92014-03-10 14:18:35 -0700514 // A rough guess at an upper size we expect to see for a frame.
515 // 256 registers
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700516 // 2 words HandleScope overhead
Andreas Gampe5b417b92014-03-10 14:18:35 -0700517 // 3+3 register spills
518 // TODO: this seems architecture specific for the case of JNI frames.
Brian Carlstromed08bd42014-03-19 18:34:17 -0700519 // TODO: 083-compiler-regressions ManyFloatArgs shows this estimate is wrong.
520 // const size_t kMaxExpectedFrameSize = (256 + 2 + 3 + 3) * sizeof(word);
521 const size_t kMaxExpectedFrameSize = 2 * KB;
Ian Rogersef7d42f2014-01-06 12:55:46 -0800522 CHECK_LE(frame_size, kMaxExpectedFrameSize);
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700523 size_t return_pc_offset = method->GetReturnPcOffset().SizeValue();
Ian Rogersef7d42f2014-01-06 12:55:46 -0800524 CHECK_LT(return_pc_offset, frame_size);
525 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700526 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700527}
528
529void StackVisitor::WalkStack(bool include_transitions) {
Ian Rogers7a22fa62013-01-23 12:16:16 -0800530 DCHECK(thread_ == Thread::Current() || thread_->IsSuspended());
Ian Rogers62d6c772013-02-27 08:32:07 -0800531 CHECK_EQ(cur_depth_, 0U);
532 bool exit_stubs_installed = Runtime::Current()->GetInstrumentation()->AreExitStubsInstalled();
jeffhao725a9572012-11-13 18:20:12 -0800533 uint32_t instrumentation_stack_depth = 0;
Dave Allisonf9439142014-03-27 15:10:22 -0700534
Ian Rogers7a22fa62013-01-23 12:16:16 -0800535 for (const ManagedStack* current_fragment = thread_->GetManagedStack(); current_fragment != NULL;
Ian Rogers0399dde2012-06-06 17:09:28 -0700536 current_fragment = current_fragment->GetLink()) {
537 cur_shadow_frame_ = current_fragment->GetTopShadowFrame();
538 cur_quick_frame_ = current_fragment->GetTopQuickFrame();
Ian Rogers1d8cdbc2014-09-22 22:51:09 -0700539 cur_quick_frame_pc_ = 0;
Dave Allisonf9439142014-03-27 15:10:22 -0700540
Ian Rogers0399dde2012-06-06 17:09:28 -0700541 if (cur_quick_frame_ != NULL) { // Handle quick stack frames.
542 // Can't be both a shadow and a quick fragment.
543 DCHECK(current_fragment->GetTopShadowFrame() == NULL);
Andreas Gampecf4035a2014-05-28 22:43:01 -0700544 mirror::ArtMethod* method = cur_quick_frame_->AsMirrorPtr();
jeffhao6641ea12013-01-02 18:13:42 -0800545 while (method != NULL) {
Dave Allison5cd33752014-04-15 15:57:58 -0700546 SanityCheckFrame();
547 bool should_continue = VisitFrame();
548 if (UNLIKELY(!should_continue)) {
549 return;
Ian Rogers0399dde2012-06-06 17:09:28 -0700550 }
Dave Allison5cd33752014-04-15 15:57:58 -0700551
Ian Rogers0399dde2012-06-06 17:09:28 -0700552 if (context_ != NULL) {
553 context_->FillCalleeSaves(*this);
554 }
555 size_t frame_size = method->GetFrameSizeInBytes();
556 // Compute PC for next stack frame from return PC.
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700557 size_t return_pc_offset = method->GetReturnPcOffset(frame_size).SizeValue();
Ian Rogers13735952014-10-08 12:43:28 -0700558 uint8_t* return_pc_addr = reinterpret_cast<uint8_t*>(cur_quick_frame_) + return_pc_offset;
Ian Rogers0399dde2012-06-06 17:09:28 -0700559 uintptr_t return_pc = *reinterpret_cast<uintptr_t*>(return_pc_addr);
Ian Rogers62d6c772013-02-27 08:32:07 -0800560 if (UNLIKELY(exit_stubs_installed)) {
Ian Rogers0399dde2012-06-06 17:09:28 -0700561 // While profiling, the return pc is restored from the side stack, except when walking
562 // the stack for an exception where the side stack will be unwound in VisitFrame.
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700563 if (reinterpret_cast<uintptr_t>(GetQuickInstrumentationExitPc()) == return_pc) {
Sebastien Hertz74e256b2013-10-04 10:40:37 +0200564 const instrumentation::InstrumentationStackFrame& instrumentation_frame =
Ian Rogerse63db272014-07-15 15:36:11 -0700565 GetInstrumentationStackFrame(thread_, instrumentation_stack_depth);
jeffhao725a9572012-11-13 18:20:12 -0800566 instrumentation_stack_depth++;
Jeff Haofb2802d2013-07-24 13:53:05 -0700567 if (GetMethod() == Runtime::Current()->GetCalleeSaveMethod(Runtime::kSaveAll)) {
568 // Skip runtime save all callee frames which are used to deliver exceptions.
569 } else if (instrumentation_frame.interpreter_entry_) {
Brian Carlstromea46f952013-07-30 01:26:50 -0700570 mirror::ArtMethod* callee = Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs);
Jeff Haofb2802d2013-07-24 13:53:05 -0700571 CHECK_EQ(GetMethod(), callee) << "Expected: " << PrettyMethod(callee) << " Found: "
Sebastien Hertz138dbfc2013-12-04 18:15:25 +0100572 << PrettyMethod(GetMethod());
Jeff Hao9a916d32013-06-27 18:45:37 -0700573 } else if (instrumentation_frame.method_ != GetMethod()) {
Ian Rogers62d6c772013-02-27 08:32:07 -0800574 LOG(FATAL) << "Expected: " << PrettyMethod(instrumentation_frame.method_)
Sebastien Hertz138dbfc2013-12-04 18:15:25 +0100575 << " Found: " << PrettyMethod(GetMethod());
Ian Rogers62d6c772013-02-27 08:32:07 -0800576 }
577 if (num_frames_ != 0) {
578 // Check agreement of frame Ids only if num_frames_ is computed to avoid infinite
579 // recursion.
580 CHECK(instrumentation_frame.frame_id_ == GetFrameId())
581 << "Expected: " << instrumentation_frame.frame_id_
582 << " Found: " << GetFrameId();
583 }
jeffhao725a9572012-11-13 18:20:12 -0800584 return_pc = instrumentation_frame.return_pc_;
Ian Rogers0399dde2012-06-06 17:09:28 -0700585 }
586 }
587 cur_quick_frame_pc_ = return_pc;
Ian Rogers13735952014-10-08 12:43:28 -0700588 uint8_t* next_frame = reinterpret_cast<uint8_t*>(cur_quick_frame_) + frame_size;
Andreas Gampecf4035a2014-05-28 22:43:01 -0700589 cur_quick_frame_ = reinterpret_cast<StackReference<mirror::ArtMethod>*>(next_frame);
Ian Rogers0399dde2012-06-06 17:09:28 -0700590 cur_depth_++;
Andreas Gampecf4035a2014-05-28 22:43:01 -0700591 method = cur_quick_frame_->AsMirrorPtr();
jeffhao6641ea12013-01-02 18:13:42 -0800592 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700593 } else if (cur_shadow_frame_ != NULL) {
594 do {
595 SanityCheckFrame();
596 bool should_continue = VisitFrame();
597 if (UNLIKELY(!should_continue)) {
598 return;
599 }
600 cur_depth_++;
601 cur_shadow_frame_ = cur_shadow_frame_->GetLink();
Brian Carlstromdf629502013-07-17 22:39:56 -0700602 } while (cur_shadow_frame_ != NULL);
Ian Rogers0399dde2012-06-06 17:09:28 -0700603 }
Ian Rogers0399dde2012-06-06 17:09:28 -0700604 if (include_transitions) {
605 bool should_continue = VisitFrame();
606 if (!should_continue) {
607 return;
608 }
609 }
Ian Rogers62d6c772013-02-27 08:32:07 -0800610 cur_depth_++;
611 }
612 if (num_frames_ != 0) {
613 CHECK_EQ(cur_depth_, num_frames_);
Ian Rogers0399dde2012-06-06 17:09:28 -0700614 }
615}
616
Mathieu Chartiere34fa1d2015-01-14 14:55:47 -0800617void JavaFrameRootInfo::Describe(std::ostream& os) const {
618 const StackVisitor* visitor = stack_visitor_;
619 CHECK(visitor != nullptr);
620 os << "Type=" << GetType() << " thread_id=" << GetThreadId() << " location=" <<
621 visitor->DescribeLocation() << " vreg=" << vreg_;
622}
623
Elliott Hughes68e76522011-10-05 13:22:16 -0700624} // namespace art