stack.cc revision 0399dde18753aa9bd2bd0d7cf60beef154d164a4
168e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes/* 268e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * Copyright (C) 2011 The Android Open Source Project 368e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * 468e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * Licensed under the Apache License, Version 2.0 (the "License"); 568e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * you may not use this file except in compliance with the License. 668e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * You may obtain a copy of the License at 768e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * 868e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * http://www.apache.org/licenses/LICENSE-2.0 968e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * 1068e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * Unless required by applicable law or agreed to in writing, software 1168e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * distributed under the License is distributed on an "AS IS" BASIS, 1268e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1368e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * See the License for the specific language governing permissions and 1468e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes * limitations under the License. 1568e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes */ 1668e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes 1768e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes#include "stack.h" 1868e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes 1968e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes#include "compiler.h" 200399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers#include "oat/runtime/context.h" 2168e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes#include "object.h" 226d4d9fcb4f01e287ee29e81cd1c941ee5d11d379Ian Rogers#include "object_utils.h" 23bfe487be25652c5456236661b9d9c3579d2296c1Elliott Hughes#include "thread_list.h" 2468e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes 2511d1b0c31ddd710d26068da8e0e4621002205b4bElliott Hughesnamespace art { 2611d1b0c31ddd710d26068da8e0e4621002205b4bElliott Hughes 270399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersclass StackGetter { 280399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers public: 290399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers StackGetter(JNIEnv* env, Thread* thread) : env_(env), thread_(thread), trace_(NULL) { 300399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 3168e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes 320399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers static void Callback(void* arg) { 330399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers reinterpret_cast<StackGetter*>(arg)->Callback(); 3468e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes } 350399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers 360399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers jobject GetTrace() { 370399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return trace_; 380399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 390399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers 400399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers private: 410399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers void Callback() { 420399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers trace_ = thread_->CreateInternalStackTrace(env_); 430399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 440399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers 450399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers JNIEnv* env_; 460399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers Thread* thread_; 470399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers jobject trace_; 480399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers}; 490399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers 500399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersjobject GetThreadStack(JNIEnv* env, Thread* thread) { 510399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers ThreadList* thread_list = Runtime::Current()->GetThreadList(); 520399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers StackGetter stack_getter(env, thread); 530399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers thread_list->RunWhileSuspended(thread, StackGetter::Callback, &stack_getter); 540399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return stack_getter.GetTrace(); 5568e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes} 5668e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes 570399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersvoid ManagedStack::PushManagedStackFragment(ManagedStack* fragment) { 580399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // Copy this top fragment into given fragment. 590399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers memcpy(fragment, this, sizeof(ManagedStack)); 600399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // Clear this fragment, which has become the top. 610399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers memset(this, 0, sizeof(ManagedStack)); 620399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // Link our top fragment onto the given fragment. 630399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers link_ = fragment; 6468e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes} 6568e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes 660399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersvoid ManagedStack::PopManagedStackFragment(const ManagedStack& fragment) { 670399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers DCHECK(&fragment == link_); 680399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // Copy this given fragment back to the top. 690399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers memcpy(this, &fragment, sizeof(ManagedStack)); 70e343b76af81a005ef64f5e75a555389fd9147dabjeffhao} 71e343b76af81a005ef64f5e75a555389fd9147dabjeffhao 720399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogerssize_t ManagedStack::NumShadowFrameReferences() const { 730399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers size_t count = 0; 740399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers for (const ManagedStack* current_fragment = this; current_fragment != NULL; 750399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers current_fragment = current_fragment->GetLink()) { 760399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_; current_frame != NULL; 770399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers current_frame = current_frame->GetLink()) { 780399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers count += current_frame->NumberOfReferences(); 790399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 80efccc565091b3409ed1372615b4ea4e2f6c39323buzbee } 810399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return count; 82b3bd5f07884f5a1f2b84224363b1372d7c28d447Elliott Hughes} 83b3bd5f07884f5a1f2b84224363b1372d7c28d447Elliott Hughes 840399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersbool ManagedStack::ShadowFramesContain(Object** shadow_frame_entry) const { 850399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers for (const ManagedStack* current_fragment = this; current_fragment != NULL; 860399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers current_fragment = current_fragment->GetLink()) { 870399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_; current_frame != NULL; 880399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers current_frame = current_frame->GetLink()) { 890399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (current_frame->Contains(shadow_frame_entry)) { 900399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return true; 910399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 920399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 930399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 940399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return false; 9568e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes} 9668e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes 970399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersuint32_t StackVisitor::GetDexPc() const { 980399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (cur_shadow_frame_ != NULL) { 990399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return cur_shadow_frame_->GetDexPC(); 1000399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } else if (cur_quick_frame_ != NULL) { 1010399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return GetMethod()->ToDexPC(AdjustQuickFramePcForDexPcComputation(cur_quick_frame_pc_)); 1020399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } else { 1030399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return 0; 1040399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 1050399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers} 1060399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers 1070399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersuint32_t StackVisitor::GetVReg(Method* m, int vreg) const { 1086d4d9fcb4f01e287ee29e81cd1c941ee5d11d379Ian Rogers DCHECK(m == GetMethod()); 1096d4d9fcb4f01e287ee29e81cd1c941ee5d11d379Ian Rogers uint32_t core_spills = m->GetCoreSpillMask(); 1100399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers const VmapTable vmap_table(m->GetVmapTableRaw()); 1110399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers uint32_t vmap_offset; 1120399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // TODO: IsInContext stops before spotting floating point registers. 1130399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (vmap_table.IsInContext(vreg, vmap_offset)) { 1140399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // Compute the register we need to load from the context. 1150399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers uint32_t spill_mask = core_spills; 1160399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers CHECK_LT(vmap_offset, static_cast<uint32_t>(__builtin_popcount(spill_mask))); 1170399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers uint32_t matches = 0; 1180399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers uint32_t spill_shifts = 0; 1190399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers while (matches != (vmap_offset + 1)) { 1200399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers DCHECK_NE(spill_mask, 0u); 1210399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers matches += spill_mask & 1; // Add 1 if the low bit is set. 1220399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers spill_mask >>= 1; 1230399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers spill_shifts++; 1240399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 1250399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers spill_shifts--; // Wind back one as we want the last match. 1260399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return GetGPR(spill_shifts); 1270399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } else { 1280399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers const DexFile::CodeItem* code_item = MethodHelper(m).GetCodeItem(); 1290399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers DCHECK(code_item != NULL); // can't be NULL or how would we compile its instructions? 1300399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers uint32_t fp_spills = m->GetFpSpillMask(); 1310399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers size_t frame_size = m->GetFrameSizeInBytes(); 1320399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return GetVReg(code_item, core_spills, fp_spills, frame_size, vreg); 1330399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 1346d4d9fcb4f01e287ee29e81cd1c941ee5d11d379Ian Rogers} 1356d4d9fcb4f01e287ee29e81cd1c941ee5d11d379Ian Rogers 1360399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersvoid StackVisitor::SetVReg(Method* m, int vreg, uint32_t new_value) { 1376d4d9fcb4f01e287ee29e81cd1c941ee5d11d379Ian Rogers DCHECK(m == GetMethod()); 1380399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers const VmapTable vmap_table(m->GetVmapTableRaw()); 1390399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers uint32_t vmap_offset; 1400399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // TODO: IsInContext stops before spotting floating point registers. 1410399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (vmap_table.IsInContext(vreg, vmap_offset)) { 1420399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers UNIMPLEMENTED(FATAL); 1430399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 14411d1b0c31ddd710d26068da8e0e4621002205b4bElliott Hughes const DexFile::CodeItem* code_item = MethodHelper(m).GetCodeItem(); 1456d4d9fcb4f01e287ee29e81cd1c941ee5d11d379Ian Rogers DCHECK(code_item != NULL); // can't be NULL or how would we compile its instructions? 1466d4d9fcb4f01e287ee29e81cd1c941ee5d11d379Ian Rogers uint32_t core_spills = m->GetCoreSpillMask(); 1476d4d9fcb4f01e287ee29e81cd1c941ee5d11d379Ian Rogers uint32_t fp_spills = m->GetFpSpillMask(); 1486d4d9fcb4f01e287ee29e81cd1c941ee5d11d379Ian Rogers size_t frame_size = m->GetFrameSizeInBytes(); 149b3bd5f07884f5a1f2b84224363b1372d7c28d447Elliott Hughes int offset = GetVRegOffset(code_item, core_spills, fp_spills, frame_size, vreg); 1500399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers byte* vreg_addr = reinterpret_cast<byte*>(GetCurrentQuickFrame()) + offset; 151cccd84f1f972f1a260c3be418c8388a5d30cf59eElliott Hughes *reinterpret_cast<uint32_t*>(vreg_addr) = new_value; 152cccd84f1f972f1a260c3be418c8388a5d30cf59eElliott Hughes} 153cccd84f1f972f1a260c3be418c8388a5d30cf59eElliott Hughes 1540399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersuintptr_t StackVisitor::GetGPR(uint32_t reg) const { 1550399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return context_->GetGPR(reg); 15668e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes} 15768e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes 1580399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersuintptr_t StackVisitor::GetReturnPc() const { 1590399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers Method** sp = GetCurrentQuickFrame(); 1600399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers CHECK(sp != NULL); 1610399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers byte* pc_addr = reinterpret_cast<byte*>(sp) + GetMethod()->GetReturnPcOffsetInBytes(); 1620399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return *reinterpret_cast<uintptr_t*>(pc_addr); 16368e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes} 16468e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes 1650399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersvoid StackVisitor::SetReturnPc(uintptr_t new_ret_pc) { 1660399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers Method** sp = GetCurrentQuickFrame(); 1670399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers CHECK(sp != NULL); 1680399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers byte* pc_addr = reinterpret_cast<byte*>(sp) + GetMethod()->GetReturnPcOffsetInBytes(); 1690399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers *reinterpret_cast<uintptr_t*>(pc_addr) = new_ret_pc; 1700399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers} 171bfe487be25652c5456236661b9d9c3579d2296c1Elliott Hughes 1720399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogerssize_t StackVisitor::ComputeNumFrames() const { 1730399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers struct NumFramesVisitor : public StackVisitor { 1740399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers explicit NumFramesVisitor(const ManagedStack* stack, 1750399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers const std::vector<TraceStackFrame>* trace_stack) : 1760399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers StackVisitor(stack, trace_stack), frames(0) {} 177bfe487be25652c5456236661b9d9c3579d2296c1Elliott Hughes 1780399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers virtual bool VisitFrame() { 1790399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers frames++; 1800399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return true; 1810399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 1820399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers size_t frames; 1830399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers }; 184bfe487be25652c5456236661b9d9c3579d2296c1Elliott Hughes 1850399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers NumFramesVisitor visitor(stack_start_, trace_stack_); 1860399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers visitor.WalkStack(true); 1870399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return visitor.frames; 1880399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers} 189bfe487be25652c5456236661b9d9c3579d2296c1Elliott Hughes 1900399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersvoid StackVisitor::SanityCheckFrame() { 1910399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers#ifndef NDEBUG 1920399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers Method* method = GetMethod(); 1930399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers CHECK(method->GetClass() == Method::GetMethodClass() || 1940399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers method->GetClass() == Method::GetConstructorClass()); 1950399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (cur_quick_frame_ != NULL) { 1960399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers method->AssertPcIsWithinCode(AdjustQuickFramePcForDexPcComputation(cur_quick_frame_pc_)); 1970399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // Frame sanity. 1980399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers size_t frame_size = method->GetFrameSizeInBytes(); 1990399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers CHECK_NE(frame_size, 0u); 2000399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers CHECK_LT(frame_size, 1024u); 2010399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers size_t return_pc_offset = method->GetReturnPcOffsetInBytes(); 2020399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers CHECK_LT(return_pc_offset, frame_size); 2030399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 2040399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers#endif 2050399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers} 206bfe487be25652c5456236661b9d9c3579d2296c1Elliott Hughes 2070399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersvoid StackVisitor::WalkStack(bool include_transitions) { 2080399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers bool method_tracing_active = Runtime::Current()->IsMethodTracingActive(); 2090399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers uint32_t trace_stack_depth = 0; 2100399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers for (const ManagedStack* current_fragment = stack_start_; current_fragment != NULL; 2110399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers current_fragment = current_fragment->GetLink()) { 2120399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers cur_shadow_frame_ = current_fragment->GetTopShadowFrame(); 2130399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers cur_quick_frame_ = current_fragment->GetTopQuickFrame(); 2140399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers cur_quick_frame_pc_ = current_fragment->GetTopQuickFramePc(); 2150399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (cur_quick_frame_ != NULL) { // Handle quick stack frames. 2160399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // Can't be both a shadow and a quick fragment. 2170399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers DCHECK(current_fragment->GetTopShadowFrame() == NULL); 2180399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers Method* method = *cur_quick_frame_; 2190399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers do { 2200399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers SanityCheckFrame(); 2210399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers bool should_continue = VisitFrame(); 2220399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (UNLIKELY(!should_continue)) { 2230399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return; 2240399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 2250399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (context_ != NULL) { 2260399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers context_->FillCalleeSaves(*this); 2270399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 2280399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers size_t frame_size = method->GetFrameSizeInBytes(); 2290399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // Compute PC for next stack frame from return PC. 2300399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers size_t return_pc_offset = method->GetReturnPcOffsetInBytes(); 2310399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers byte* return_pc_addr = reinterpret_cast<byte*>(cur_quick_frame_) + return_pc_offset; 2320399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers uintptr_t return_pc = *reinterpret_cast<uintptr_t*>(return_pc_addr); 2330399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (UNLIKELY(method_tracing_active)) { 2340399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // While profiling, the return pc is restored from the side stack, except when walking 2350399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // the stack for an exception where the side stack will be unwound in VisitFrame. 2360399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // TODO: stop using include_transitions as a proxy for is this the catch block visitor. 2370399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (IsTraceExitPc(return_pc) && !include_transitions) { 2380399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers // TODO: unify trace and managed stack. 2390399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers TraceStackFrame trace_frame = GetTraceStackFrame(trace_stack_depth); 2400399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers trace_stack_depth++; 2410399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers CHECK(trace_frame.method_ == GetMethod()) << "Excepted: " << PrettyMethod(method) 2420399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers << " Found: " << PrettyMethod(GetMethod()); 2430399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return_pc = trace_frame.return_pc_; 2440399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 2450399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 2460399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers cur_quick_frame_pc_ = return_pc; 2470399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers byte* next_frame = reinterpret_cast<byte*>(cur_quick_frame_) + frame_size; 2480399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers cur_quick_frame_ = reinterpret_cast<Method**>(next_frame); 2490399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers cur_depth_++; 2500399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers method = *cur_quick_frame_; 2510399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } while (method != NULL); 2520399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } else if (cur_shadow_frame_ != NULL) { 2530399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers do { 2540399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers SanityCheckFrame(); 2550399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers bool should_continue = VisitFrame(); 2560399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (UNLIKELY(!should_continue)) { 2570399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return; 2580399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 2590399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers cur_depth_++; 2600399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers cur_shadow_frame_ = cur_shadow_frame_->GetLink(); 2610399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } while(cur_shadow_frame_ != NULL); 2620399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 2630399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers cur_depth_++; 2640399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (include_transitions) { 2650399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers bool should_continue = VisitFrame(); 2660399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers if (!should_continue) { 2670399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers return; 2680399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 2690399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 2700399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers } 271bfe487be25652c5456236661b9d9c3579d2296c1Elliott Hughes} 272bfe487be25652c5456236661b9d9c3579d2296c1Elliott Hughes 27368e76526e98432625464022cb26f66b9ef6f5af4Elliott Hughes} // namespace art 274