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985 lines
39 KiB
985 lines
39 KiB
4 months ago
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/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "stack.h"
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#include <limits>
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#include "android-base/stringprintf.h"
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#include "arch/context.h"
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#include "art_method-inl.h"
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#include "base/callee_save_type.h"
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#include "base/enums.h"
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#include "base/hex_dump.h"
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#include "dex/dex_file_types.h"
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#include "entrypoints/entrypoint_utils-inl.h"
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#include "entrypoints/quick/callee_save_frame.h"
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#include "entrypoints/runtime_asm_entrypoints.h"
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#include "gc/space/image_space.h"
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#include "gc/space/space-inl.h"
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#include "interpreter/mterp/nterp.h"
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#include "interpreter/shadow_frame-inl.h"
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#include "jit/jit.h"
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#include "jit/jit_code_cache.h"
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#include "linear_alloc.h"
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#include "managed_stack.h"
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#include "mirror/class-inl.h"
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#include "mirror/object-inl.h"
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#include "mirror/object_array-inl.h"
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#include "nterp_helpers.h"
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#include "oat_quick_method_header.h"
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#include "obj_ptr-inl.h"
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#include "quick/quick_method_frame_info.h"
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#include "runtime.h"
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#include "thread.h"
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#include "thread_list.h"
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namespace art {
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using android::base::StringPrintf;
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static constexpr bool kDebugStackWalk = false;
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StackVisitor::StackVisitor(Thread* thread,
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Context* context,
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StackWalkKind walk_kind,
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bool check_suspended)
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: StackVisitor(thread, context, walk_kind, 0, check_suspended) {}
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StackVisitor::StackVisitor(Thread* thread,
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Context* context,
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StackWalkKind walk_kind,
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size_t num_frames,
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bool check_suspended)
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: thread_(thread),
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walk_kind_(walk_kind),
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cur_shadow_frame_(nullptr),
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cur_quick_frame_(nullptr),
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cur_quick_frame_pc_(0),
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cur_oat_quick_method_header_(nullptr),
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num_frames_(num_frames),
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cur_depth_(0),
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cur_inline_info_(nullptr, CodeInfo()),
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cur_stack_map_(0, StackMap()),
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context_(context),
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check_suspended_(check_suspended) {
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if (check_suspended_) {
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DCHECK(thread == Thread::Current() || thread->IsSuspended()) << *thread;
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}
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}
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CodeInfo* StackVisitor::GetCurrentInlineInfo() const {
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DCHECK(!(*cur_quick_frame_)->IsNative());
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const OatQuickMethodHeader* header = GetCurrentOatQuickMethodHeader();
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if (cur_inline_info_.first != header) {
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cur_inline_info_ = std::make_pair(header, CodeInfo::DecodeInlineInfoOnly(header));
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}
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return &cur_inline_info_.second;
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}
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StackMap* StackVisitor::GetCurrentStackMap() const {
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DCHECK(!(*cur_quick_frame_)->IsNative());
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const OatQuickMethodHeader* header = GetCurrentOatQuickMethodHeader();
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if (cur_stack_map_.first != cur_quick_frame_pc_) {
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uint32_t pc = header->NativeQuickPcOffset(cur_quick_frame_pc_);
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cur_stack_map_ = std::make_pair(cur_quick_frame_pc_,
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GetCurrentInlineInfo()->GetStackMapForNativePcOffset(pc));
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}
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return &cur_stack_map_.second;
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}
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ArtMethod* StackVisitor::GetMethod() const {
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if (cur_shadow_frame_ != nullptr) {
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return cur_shadow_frame_->GetMethod();
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} else if (cur_quick_frame_ != nullptr) {
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if (IsInInlinedFrame()) {
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CodeInfo* code_info = GetCurrentInlineInfo();
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DCHECK(walk_kind_ != StackWalkKind::kSkipInlinedFrames);
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return GetResolvedMethod(*GetCurrentQuickFrame(), *code_info, current_inline_frames_);
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} else {
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return *cur_quick_frame_;
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}
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}
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return nullptr;
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}
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uint32_t StackVisitor::GetDexPc(bool abort_on_failure) const {
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if (cur_shadow_frame_ != nullptr) {
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return cur_shadow_frame_->GetDexPC();
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} else if (cur_quick_frame_ != nullptr) {
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if (IsInInlinedFrame()) {
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return current_inline_frames_.back().GetDexPc();
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} else if (cur_oat_quick_method_header_ == nullptr) {
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return dex::kDexNoIndex;
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} else if ((*GetCurrentQuickFrame())->IsNative()) {
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return cur_oat_quick_method_header_->ToDexPc(
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GetCurrentQuickFrame(), cur_quick_frame_pc_, abort_on_failure);
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} else if (cur_oat_quick_method_header_->IsOptimized()) {
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StackMap* stack_map = GetCurrentStackMap();
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DCHECK(stack_map->IsValid());
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return stack_map->GetDexPc();
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} else {
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DCHECK(cur_oat_quick_method_header_->IsNterpMethodHeader());
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return NterpGetDexPC(cur_quick_frame_);
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}
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} else {
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return 0;
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}
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}
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extern "C" mirror::Object* artQuickGetProxyThisObject(ArtMethod** sp)
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REQUIRES_SHARED(Locks::mutator_lock_);
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ObjPtr<mirror::Object> StackVisitor::GetThisObject() const {
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DCHECK_EQ(Runtime::Current()->GetClassLinker()->GetImagePointerSize(), kRuntimePointerSize);
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ArtMethod* m = GetMethod();
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if (m->IsStatic()) {
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return nullptr;
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} else if (m->IsNative()) {
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if (cur_quick_frame_ != nullptr) {
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// The `this` reference is stored in the first out vreg in the caller's frame.
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const size_t frame_size = GetCurrentQuickFrameInfo().FrameSizeInBytes();
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auto* stack_ref = reinterpret_cast<StackReference<mirror::Object>*>(
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reinterpret_cast<uint8_t*>(cur_quick_frame_) + frame_size + sizeof(ArtMethod*));
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return stack_ref->AsMirrorPtr();
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} else {
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return cur_shadow_frame_->GetVRegReference(0);
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}
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} else if (m->IsProxyMethod()) {
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if (cur_quick_frame_ != nullptr) {
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return artQuickGetProxyThisObject(cur_quick_frame_);
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} else {
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return cur_shadow_frame_->GetVRegReference(0);
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}
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} else {
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CodeItemDataAccessor accessor(m->DexInstructionData());
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if (!accessor.HasCodeItem()) {
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UNIMPLEMENTED(ERROR) << "Failed to determine this object of abstract or proxy method: "
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<< ArtMethod::PrettyMethod(m);
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return nullptr;
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} else {
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uint16_t reg = accessor.RegistersSize() - accessor.InsSize();
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uint32_t value = 0;
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if (!GetVReg(m, reg, kReferenceVReg, &value)) {
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return nullptr;
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}
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return reinterpret_cast<mirror::Object*>(value);
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}
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}
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}
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size_t StackVisitor::GetNativePcOffset() const {
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DCHECK(!IsShadowFrame());
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return GetCurrentOatQuickMethodHeader()->NativeQuickPcOffset(cur_quick_frame_pc_);
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}
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bool StackVisitor::GetVRegFromDebuggerShadowFrame(uint16_t vreg,
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VRegKind kind,
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uint32_t* val) const {
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size_t frame_id = const_cast<StackVisitor*>(this)->GetFrameId();
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ShadowFrame* shadow_frame = thread_->FindDebuggerShadowFrame(frame_id);
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if (shadow_frame != nullptr) {
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bool* updated_vreg_flags = thread_->GetUpdatedVRegFlags(frame_id);
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DCHECK(updated_vreg_flags != nullptr);
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if (updated_vreg_flags[vreg]) {
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// Value is set by the debugger.
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if (kind == kReferenceVReg) {
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*val = static_cast<uint32_t>(reinterpret_cast<uintptr_t>(
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shadow_frame->GetVRegReference(vreg)));
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} else {
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*val = shadow_frame->GetVReg(vreg);
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}
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return true;
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}
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}
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// No value is set by the debugger.
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return false;
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}
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bool StackVisitor::GetVReg(ArtMethod* m,
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uint16_t vreg,
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VRegKind kind,
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uint32_t* val,
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std::optional<DexRegisterLocation> location) const {
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if (cur_quick_frame_ != nullptr) {
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DCHECK(context_ != nullptr); // You can't reliably read registers without a context.
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DCHECK(m == GetMethod());
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// Check if there is value set by the debugger.
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if (GetVRegFromDebuggerShadowFrame(vreg, kind, val)) {
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return true;
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}
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bool result = false;
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if (cur_oat_quick_method_header_->IsNterpMethodHeader()) {
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result = true;
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*val = (kind == kReferenceVReg)
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? NterpGetVRegReference(cur_quick_frame_, vreg)
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: NterpGetVReg(cur_quick_frame_, vreg);
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} else {
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DCHECK(cur_oat_quick_method_header_->IsOptimized());
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if (location.has_value() && kind != kReferenceVReg) {
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uint32_t val2 = *val;
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// The caller already known the register location, so we can use the faster overload
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// which does not decode the stack maps.
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result = GetVRegFromOptimizedCode(location.value(), val);
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// Compare to the slower overload.
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DCHECK_EQ(result, GetVRegFromOptimizedCode(m, vreg, kind, &val2));
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DCHECK_EQ(*val, val2);
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} else {
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result = GetVRegFromOptimizedCode(m, vreg, kind, val);
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}
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}
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if (kind == kReferenceVReg) {
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// Perform a read barrier in case we are in a different thread and GC is ongoing.
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mirror::Object* out = reinterpret_cast<mirror::Object*>(static_cast<uintptr_t>(*val));
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uintptr_t ptr_out = reinterpret_cast<uintptr_t>(GcRoot<mirror::Object>(out).Read());
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DCHECK_LT(ptr_out, std::numeric_limits<uint32_t>::max());
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*val = static_cast<uint32_t>(ptr_out);
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}
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return result;
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} else {
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DCHECK(cur_shadow_frame_ != nullptr);
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if (kind == kReferenceVReg) {
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*val = static_cast<uint32_t>(reinterpret_cast<uintptr_t>(
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cur_shadow_frame_->GetVRegReference(vreg)));
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} else {
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*val = cur_shadow_frame_->GetVReg(vreg);
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}
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return true;
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}
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}
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bool StackVisitor::GetVRegFromOptimizedCode(ArtMethod* m,
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uint16_t vreg,
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VRegKind kind,
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uint32_t* val) const {
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DCHECK_EQ(m, GetMethod());
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// Can't be null or how would we compile its instructions?
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DCHECK(m->GetCodeItem() != nullptr) << m->PrettyMethod();
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CodeItemDataAccessor accessor(m->DexInstructionData());
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uint16_t number_of_dex_registers = accessor.RegistersSize();
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DCHECK_LT(vreg, number_of_dex_registers);
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const OatQuickMethodHeader* method_header = GetCurrentOatQuickMethodHeader();
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CodeInfo code_info(method_header);
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|
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uint32_t native_pc_offset = method_header->NativeQuickPcOffset(cur_quick_frame_pc_);
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StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset);
|
||
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DCHECK(stack_map.IsValid());
|
||
|
|
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DexRegisterMap dex_register_map = IsInInlinedFrame()
|
||
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? code_info.GetInlineDexRegisterMapOf(stack_map, current_inline_frames_.back())
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: code_info.GetDexRegisterMapOf(stack_map);
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if (dex_register_map.empty()) {
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return false;
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}
|
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DCHECK_EQ(dex_register_map.size(), number_of_dex_registers);
|
||
|
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DexRegisterLocation::Kind location_kind = dex_register_map[vreg].GetKind();
|
||
|
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switch (location_kind) {
|
||
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case DexRegisterLocation::Kind::kInStack: {
|
||
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const int32_t offset = dex_register_map[vreg].GetStackOffsetInBytes();
|
||
|
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BitMemoryRegion stack_mask = code_info.GetStackMaskOf(stack_map);
|
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if (kind == kReferenceVReg && !stack_mask.LoadBit(offset / kFrameSlotSize)) {
|
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return false;
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||
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}
|
||
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const uint8_t* addr = reinterpret_cast<const uint8_t*>(cur_quick_frame_) + offset;
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||
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*val = *reinterpret_cast<const uint32_t*>(addr);
|
||
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return true;
|
||
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}
|
||
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case DexRegisterLocation::Kind::kInRegister: {
|
||
|
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uint32_t register_mask = code_info.GetRegisterMaskOf(stack_map);
|
||
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uint32_t reg = dex_register_map[vreg].GetMachineRegister();
|
||
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if (kind == kReferenceVReg && !(register_mask & (1 << reg))) {
|
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return false;
|
||
|
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}
|
||
|
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return GetRegisterIfAccessible(reg, location_kind, val);
|
||
|
|
}
|
||
|
|
case DexRegisterLocation::Kind::kInRegisterHigh:
|
||
|
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case DexRegisterLocation::Kind::kInFpuRegister:
|
||
|
|
case DexRegisterLocation::Kind::kInFpuRegisterHigh: {
|
||
|
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if (kind == kReferenceVReg) {
|
||
|
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return false;
|
||
|
|
}
|
||
|
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uint32_t reg = dex_register_map[vreg].GetMachineRegister();
|
||
|
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return GetRegisterIfAccessible(reg, location_kind, val);
|
||
|
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}
|
||
|
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case DexRegisterLocation::Kind::kConstant: {
|
||
|
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uint32_t result = dex_register_map[vreg].GetConstant();
|
||
|
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if (kind == kReferenceVReg && result != 0) {
|
||
|
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return false;
|
||
|
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}
|
||
|
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*val = result;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
case DexRegisterLocation::Kind::kNone:
|
||
|
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return false;
|
||
|
|
default:
|
||
|
|
LOG(FATAL) << "Unexpected location kind " << dex_register_map[vreg].GetKind();
|
||
|
|
UNREACHABLE();
|
||
|
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}
|
||
|
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}
|
||
|
|
|
||
|
|
bool StackVisitor::GetVRegFromOptimizedCode(DexRegisterLocation location, uint32_t* val) const {
|
||
|
|
switch (location.GetKind()) {
|
||
|
|
case DexRegisterLocation::Kind::kInvalid:
|
||
|
|
break;
|
||
|
|
case DexRegisterLocation::Kind::kInStack: {
|
||
|
|
const uint8_t* sp = reinterpret_cast<const uint8_t*>(cur_quick_frame_);
|
||
|
|
*val = *reinterpret_cast<const uint32_t*>(sp + location.GetStackOffsetInBytes());
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
case DexRegisterLocation::Kind::kInRegister:
|
||
|
|
case DexRegisterLocation::Kind::kInRegisterHigh:
|
||
|
|
case DexRegisterLocation::Kind::kInFpuRegister:
|
||
|
|
case DexRegisterLocation::Kind::kInFpuRegisterHigh:
|
||
|
|
return GetRegisterIfAccessible(location.GetMachineRegister(), location.GetKind(), val);
|
||
|
|
case DexRegisterLocation::Kind::kConstant:
|
||
|
|
*val = location.GetConstant();
|
||
|
|
return true;
|
||
|
|
case DexRegisterLocation::Kind::kNone:
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
LOG(FATAL) << "Unexpected location kind " << location.GetKind();
|
||
|
|
UNREACHABLE();
|
||
|
|
}
|
||
|
|
|
||
|
|
bool StackVisitor::GetRegisterIfAccessible(uint32_t reg,
|
||
|
|
DexRegisterLocation::Kind location_kind,
|
||
|
|
uint32_t* val) const {
|
||
|
|
const bool is_float = (location_kind == DexRegisterLocation::Kind::kInFpuRegister) ||
|
||
|
|
(location_kind == DexRegisterLocation::Kind::kInFpuRegisterHigh);
|
||
|
|
|
||
|
|
if (kRuntimeISA == InstructionSet::kX86 && is_float) {
|
||
|
|
// X86 float registers are 64-bit and each XMM register is provided as two separate
|
||
|
|
// 32-bit registers by the context.
|
||
|
|
reg = (location_kind == DexRegisterLocation::Kind::kInFpuRegisterHigh)
|
||
|
|
? (2 * reg + 1)
|
||
|
|
: (2 * reg);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!IsAccessibleRegister(reg, is_float)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
uintptr_t ptr_val = GetRegister(reg, is_float);
|
||
|
|
const bool target64 = Is64BitInstructionSet(kRuntimeISA);
|
||
|
|
if (target64) {
|
||
|
|
const bool is_high = (location_kind == DexRegisterLocation::Kind::kInRegisterHigh) ||
|
||
|
|
(location_kind == DexRegisterLocation::Kind::kInFpuRegisterHigh);
|
||
|
|
int64_t value_long = static_cast<int64_t>(ptr_val);
|
||
|
|
ptr_val = static_cast<uintptr_t>(is_high ? High32Bits(value_long) : Low32Bits(value_long));
|
||
|
|
}
|
||
|
|
*val = ptr_val;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool StackVisitor::GetVRegPairFromDebuggerShadowFrame(uint16_t vreg,
|
||
|
|
VRegKind kind_lo,
|
||
|
|
VRegKind kind_hi,
|
||
|
|
uint64_t* val) const {
|
||
|
|
uint32_t low_32bits;
|
||
|
|
uint32_t high_32bits;
|
||
|
|
bool success = GetVRegFromDebuggerShadowFrame(vreg, kind_lo, &low_32bits);
|
||
|
|
success &= GetVRegFromDebuggerShadowFrame(vreg + 1, kind_hi, &high_32bits);
|
||
|
|
if (success) {
|
||
|
|
*val = (static_cast<uint64_t>(high_32bits) << 32) | static_cast<uint64_t>(low_32bits);
|
||
|
|
}
|
||
|
|
return success;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool StackVisitor::GetVRegPair(ArtMethod* m, uint16_t vreg, VRegKind kind_lo,
|
||
|
|
VRegKind kind_hi, uint64_t* val) const {
|
||
|
|
if (kind_lo == kLongLoVReg) {
|
||
|
|
DCHECK_EQ(kind_hi, kLongHiVReg);
|
||
|
|
} else if (kind_lo == kDoubleLoVReg) {
|
||
|
|
DCHECK_EQ(kind_hi, kDoubleHiVReg);
|
||
|
|
} else {
|
||
|
|
LOG(FATAL) << "Expected long or double: kind_lo=" << kind_lo << ", kind_hi=" << kind_hi;
|
||
|
|
UNREACHABLE();
|
||
|
|
}
|
||
|
|
// Check if there is value set by the debugger.
|
||
|
|
if (GetVRegPairFromDebuggerShadowFrame(vreg, kind_lo, kind_hi, val)) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
if (cur_quick_frame_ == nullptr) {
|
||
|
|
DCHECK(cur_shadow_frame_ != nullptr);
|
||
|
|
*val = cur_shadow_frame_->GetVRegLong(vreg);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
if (cur_oat_quick_method_header_->IsNterpMethodHeader()) {
|
||
|
|
uint64_t val_lo = NterpGetVReg(cur_quick_frame_, vreg);
|
||
|
|
uint64_t val_hi = NterpGetVReg(cur_quick_frame_, vreg + 1);
|
||
|
|
*val = (val_hi << 32) + val_lo;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
DCHECK(context_ != nullptr); // You can't reliably read registers without a context.
|
||
|
|
DCHECK(m == GetMethod());
|
||
|
|
DCHECK(cur_oat_quick_method_header_->IsOptimized());
|
||
|
|
return GetVRegPairFromOptimizedCode(m, vreg, kind_lo, kind_hi, val);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool StackVisitor::GetVRegPairFromOptimizedCode(ArtMethod* m, uint16_t vreg,
|
||
|
|
VRegKind kind_lo, VRegKind kind_hi,
|
||
|
|
uint64_t* val) const {
|
||
|
|
uint32_t low_32bits;
|
||
|
|
uint32_t high_32bits;
|
||
|
|
bool success = GetVRegFromOptimizedCode(m, vreg, kind_lo, &low_32bits);
|
||
|
|
success &= GetVRegFromOptimizedCode(m, vreg + 1, kind_hi, &high_32bits);
|
||
|
|
if (success) {
|
||
|
|
*val = (static_cast<uint64_t>(high_32bits) << 32) | static_cast<uint64_t>(low_32bits);
|
||
|
|
}
|
||
|
|
return success;
|
||
|
|
}
|
||
|
|
|
||
|
|
ShadowFrame* StackVisitor::PrepareSetVReg(ArtMethod* m, uint16_t vreg, bool wide) {
|
||
|
|
CodeItemDataAccessor accessor(m->DexInstructionData());
|
||
|
|
if (!accessor.HasCodeItem()) {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
ShadowFrame* shadow_frame = GetCurrentShadowFrame();
|
||
|
|
if (shadow_frame == nullptr) {
|
||
|
|
// This is a compiled frame: we must prepare and update a shadow frame that will
|
||
|
|
// be executed by the interpreter after deoptimization of the stack.
|
||
|
|
const size_t frame_id = GetFrameId();
|
||
|
|
const uint16_t num_regs = accessor.RegistersSize();
|
||
|
|
shadow_frame = thread_->FindOrCreateDebuggerShadowFrame(frame_id, num_regs, m, GetDexPc());
|
||
|
|
CHECK(shadow_frame != nullptr);
|
||
|
|
// Remember the vreg(s) has been set for debugging and must not be overwritten by the
|
||
|
|
// original value during deoptimization of the stack.
|
||
|
|
thread_->GetUpdatedVRegFlags(frame_id)[vreg] = true;
|
||
|
|
if (wide) {
|
||
|
|
thread_->GetUpdatedVRegFlags(frame_id)[vreg + 1] = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return shadow_frame;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool StackVisitor::SetVReg(ArtMethod* m, uint16_t vreg, uint32_t new_value, VRegKind kind) {
|
||
|
|
DCHECK(kind == kIntVReg || kind == kFloatVReg);
|
||
|
|
ShadowFrame* shadow_frame = PrepareSetVReg(m, vreg, /* wide= */ false);
|
||
|
|
if (shadow_frame == nullptr) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
shadow_frame->SetVReg(vreg, new_value);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool StackVisitor::SetVRegReference(ArtMethod* m, uint16_t vreg, ObjPtr<mirror::Object> new_value) {
|
||
|
|
ShadowFrame* shadow_frame = PrepareSetVReg(m, vreg, /* wide= */ false);
|
||
|
|
if (shadow_frame == nullptr) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
shadow_frame->SetVRegReference(vreg, new_value);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool StackVisitor::SetVRegPair(ArtMethod* m,
|
||
|
|
uint16_t vreg,
|
||
|
|
uint64_t new_value,
|
||
|
|
VRegKind kind_lo,
|
||
|
|
VRegKind kind_hi) {
|
||
|
|
if (kind_lo == kLongLoVReg) {
|
||
|
|
DCHECK_EQ(kind_hi, kLongHiVReg);
|
||
|
|
} else if (kind_lo == kDoubleLoVReg) {
|
||
|
|
DCHECK_EQ(kind_hi, kDoubleHiVReg);
|
||
|
|
} else {
|
||
|
|
LOG(FATAL) << "Expected long or double: kind_lo=" << kind_lo << ", kind_hi=" << kind_hi;
|
||
|
|
UNREACHABLE();
|
||
|
|
}
|
||
|
|
ShadowFrame* shadow_frame = PrepareSetVReg(m, vreg, /* wide= */ true);
|
||
|
|
if (shadow_frame == nullptr) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
shadow_frame->SetVRegLong(vreg, new_value);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool StackVisitor::IsAccessibleGPR(uint32_t reg) const {
|
||
|
|
DCHECK(context_ != nullptr);
|
||
|
|
return context_->IsAccessibleGPR(reg);
|
||
|
|
}
|
||
|
|
|
||
|
|
uintptr_t* StackVisitor::GetGPRAddress(uint32_t reg) const {
|
||
|
|
DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine";
|
||
|
|
DCHECK(context_ != nullptr);
|
||
|
|
return context_->GetGPRAddress(reg);
|
||
|
|
}
|
||
|
|
|
||
|
|
uintptr_t StackVisitor::GetGPR(uint32_t reg) const {
|
||
|
|
DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine";
|
||
|
|
DCHECK(context_ != nullptr);
|
||
|
|
return context_->GetGPR(reg);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool StackVisitor::IsAccessibleFPR(uint32_t reg) const {
|
||
|
|
DCHECK(context_ != nullptr);
|
||
|
|
return context_->IsAccessibleFPR(reg);
|
||
|
|
}
|
||
|
|
|
||
|
|
uintptr_t StackVisitor::GetFPR(uint32_t reg) const {
|
||
|
|
DCHECK(cur_quick_frame_ != nullptr) << "This is a quick frame routine";
|
||
|
|
DCHECK(context_ != nullptr);
|
||
|
|
return context_->GetFPR(reg);
|
||
|
|
}
|
||
|
|
|
||
|
|
uintptr_t StackVisitor::GetReturnPcAddr() const {
|
||
|
|
uintptr_t sp = reinterpret_cast<uintptr_t>(GetCurrentQuickFrame());
|
||
|
|
DCHECK_NE(sp, 0u);
|
||
|
|
return sp + GetCurrentQuickFrameInfo().GetReturnPcOffset();
|
||
|
|
}
|
||
|
|
|
||
|
|
uintptr_t StackVisitor::GetReturnPc() const {
|
||
|
|
return *reinterpret_cast<uintptr_t*>(GetReturnPcAddr());
|
||
|
|
}
|
||
|
|
|
||
|
|
void StackVisitor::SetReturnPc(uintptr_t new_ret_pc) {
|
||
|
|
*reinterpret_cast<uintptr_t*>(GetReturnPcAddr()) = new_ret_pc;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t StackVisitor::ComputeNumFrames(Thread* thread, StackWalkKind walk_kind) {
|
||
|
|
struct NumFramesVisitor : public StackVisitor {
|
||
|
|
NumFramesVisitor(Thread* thread_in, StackWalkKind walk_kind_in)
|
||
|
|
: StackVisitor(thread_in, nullptr, walk_kind_in), frames(0) {}
|
||
|
|
|
||
|
|
bool VisitFrame() override {
|
||
|
|
frames++;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t frames;
|
||
|
|
};
|
||
|
|
NumFramesVisitor visitor(thread, walk_kind);
|
||
|
|
visitor.WalkStack(true);
|
||
|
|
return visitor.frames;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool StackVisitor::GetNextMethodAndDexPc(ArtMethod** next_method, uint32_t* next_dex_pc) {
|
||
|
|
struct HasMoreFramesVisitor : public StackVisitor {
|
||
|
|
HasMoreFramesVisitor(Thread* thread,
|
||
|
|
StackWalkKind walk_kind,
|
||
|
|
size_t num_frames,
|
||
|
|
size_t frame_height)
|
||
|
|
: StackVisitor(thread, nullptr, walk_kind, num_frames),
|
||
|
|
frame_height_(frame_height),
|
||
|
|
found_frame_(false),
|
||
|
|
has_more_frames_(false),
|
||
|
|
next_method_(nullptr),
|
||
|
|
next_dex_pc_(0) {
|
||
|
|
}
|
||
|
|
|
||
|
|
bool VisitFrame() override REQUIRES_SHARED(Locks::mutator_lock_) {
|
||
|
|
if (found_frame_) {
|
||
|
|
ArtMethod* method = GetMethod();
|
||
|
|
if (method != nullptr && !method->IsRuntimeMethod()) {
|
||
|
|
has_more_frames_ = true;
|
||
|
|
next_method_ = method;
|
||
|
|
next_dex_pc_ = GetDexPc();
|
||
|
|
return false; // End stack walk once next method is found.
|
||
|
|
}
|
||
|
|
} else if (GetFrameHeight() == frame_height_) {
|
||
|
|
found_frame_ = true;
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t frame_height_;
|
||
|
|
bool found_frame_;
|
||
|
|
bool has_more_frames_;
|
||
|
|
ArtMethod* next_method_;
|
||
|
|
uint32_t next_dex_pc_;
|
||
|
|
};
|
||
|
|
HasMoreFramesVisitor visitor(thread_, walk_kind_, GetNumFrames(), GetFrameHeight());
|
||
|
|
visitor.WalkStack(true);
|
||
|
|
*next_method = visitor.next_method_;
|
||
|
|
*next_dex_pc = visitor.next_dex_pc_;
|
||
|
|
return visitor.has_more_frames_;
|
||
|
|
}
|
||
|
|
|
||
|
|
void StackVisitor::DescribeStack(Thread* thread) {
|
||
|
|
struct DescribeStackVisitor : public StackVisitor {
|
||
|
|
explicit DescribeStackVisitor(Thread* thread_in)
|
||
|
|
: StackVisitor(thread_in, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames) {}
|
||
|
|
|
||
|
|
bool VisitFrame() override REQUIRES_SHARED(Locks::mutator_lock_) {
|
||
|
|
LOG(INFO) << "Frame Id=" << GetFrameId() << " " << DescribeLocation();
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
DescribeStackVisitor visitor(thread);
|
||
|
|
visitor.WalkStack(true);
|
||
|
|
}
|
||
|
|
|
||
|
|
std::string StackVisitor::DescribeLocation() const {
|
||
|
|
std::string result("Visiting method '");
|
||
|
|
ArtMethod* m = GetMethod();
|
||
|
|
if (m == nullptr) {
|
||
|
|
return "upcall";
|
||
|
|
}
|
||
|
|
result += m->PrettyMethod();
|
||
|
|
result += StringPrintf("' at dex PC 0x%04x", GetDexPc());
|
||
|
|
if (!IsShadowFrame()) {
|
||
|
|
result += StringPrintf(" (native PC %p)", reinterpret_cast<void*>(GetCurrentQuickFramePc()));
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
void StackVisitor::SetMethod(ArtMethod* method) {
|
||
|
|
DCHECK(GetMethod() != nullptr);
|
||
|
|
if (cur_shadow_frame_ != nullptr) {
|
||
|
|
cur_shadow_frame_->SetMethod(method);
|
||
|
|
} else {
|
||
|
|
DCHECK(cur_quick_frame_ != nullptr);
|
||
|
|
CHECK(!IsInInlinedFrame()) << "We do not support setting inlined method's ArtMethod: "
|
||
|
|
<< GetMethod()->PrettyMethod() << " is inlined into "
|
||
|
|
<< GetOuterMethod()->PrettyMethod();
|
||
|
|
*cur_quick_frame_ = method;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void AssertPcIsWithinQuickCode(ArtMethod* method, uintptr_t pc)
|
||
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
||
|
|
if (method->IsNative() || method->IsRuntimeMethod() || method->IsProxyMethod()) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pc == reinterpret_cast<uintptr_t>(GetQuickInstrumentationExitPc())) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
Runtime* runtime = Runtime::Current();
|
||
|
|
if (runtime->UseJitCompilation() &&
|
||
|
|
runtime->GetJit()->GetCodeCache()->ContainsPc(reinterpret_cast<const void*>(pc))) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
const void* code = method->GetEntryPointFromQuickCompiledCode();
|
||
|
|
if (code == GetQuickInstrumentationEntryPoint() || code == GetInvokeObsoleteMethodStub()) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
|
||
|
|
if (class_linker->IsQuickToInterpreterBridge(code) ||
|
||
|
|
class_linker->IsQuickResolutionStub(code)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (runtime->UseJitCompilation() && runtime->GetJit()->GetCodeCache()->ContainsPc(code)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint32_t code_size = OatQuickMethodHeader::FromEntryPoint(code)->GetCodeSize();
|
||
|
|
uintptr_t code_start = reinterpret_cast<uintptr_t>(code);
|
||
|
|
CHECK(code_start <= pc && pc <= (code_start + code_size))
|
||
|
|
<< method->PrettyMethod()
|
||
|
|
<< " pc=" << std::hex << pc
|
||
|
|
<< " code_start=" << code_start
|
||
|
|
<< " code_size=" << code_size;
|
||
|
|
}
|
||
|
|
|
||
|
|
void StackVisitor::ValidateFrame() const {
|
||
|
|
if (kIsDebugBuild) {
|
||
|
|
ArtMethod* method = GetMethod();
|
||
|
|
ObjPtr<mirror::Class> declaring_class = method->GetDeclaringClass();
|
||
|
|
// Runtime methods have null declaring class.
|
||
|
|
if (!method->IsRuntimeMethod()) {
|
||
|
|
CHECK(declaring_class != nullptr);
|
||
|
|
CHECK_EQ(declaring_class->GetClass(), declaring_class->GetClass()->GetClass())
|
||
|
|
<< declaring_class;
|
||
|
|
} else {
|
||
|
|
CHECK(declaring_class == nullptr);
|
||
|
|
}
|
||
|
|
Runtime* const runtime = Runtime::Current();
|
||
|
|
LinearAlloc* const linear_alloc = runtime->GetLinearAlloc();
|
||
|
|
if (!linear_alloc->Contains(method)) {
|
||
|
|
// Check class linker linear allocs.
|
||
|
|
// We get the canonical method as copied methods may have been allocated
|
||
|
|
// by a different class loader.
|
||
|
|
const PointerSize ptrSize = runtime->GetClassLinker()->GetImagePointerSize();
|
||
|
|
ArtMethod* canonical = method->GetCanonicalMethod(ptrSize);
|
||
|
|
ObjPtr<mirror::Class> klass = canonical->GetDeclaringClass();
|
||
|
|
LinearAlloc* const class_linear_alloc = (klass != nullptr)
|
||
|
|
? runtime->GetClassLinker()->GetAllocatorForClassLoader(klass->GetClassLoader())
|
||
|
|
: linear_alloc;
|
||
|
|
if (!class_linear_alloc->Contains(canonical)) {
|
||
|
|
// Check image space.
|
||
|
|
bool in_image = false;
|
||
|
|
for (auto& space : runtime->GetHeap()->GetContinuousSpaces()) {
|
||
|
|
if (space->IsImageSpace()) {
|
||
|
|
auto* image_space = space->AsImageSpace();
|
||
|
|
const auto& header = image_space->GetImageHeader();
|
||
|
|
const ImageSection& methods = header.GetMethodsSection();
|
||
|
|
const ImageSection& runtime_methods = header.GetRuntimeMethodsSection();
|
||
|
|
const size_t offset = reinterpret_cast<const uint8_t*>(canonical) - image_space->Begin();
|
||
|
|
if (methods.Contains(offset) || runtime_methods.Contains(offset)) {
|
||
|
|
in_image = true;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
CHECK(in_image) << canonical->PrettyMethod() << " not in linear alloc or image";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (cur_quick_frame_ != nullptr) {
|
||
|
|
AssertPcIsWithinQuickCode(method, cur_quick_frame_pc_);
|
||
|
|
// Frame consistency checks.
|
||
|
|
size_t frame_size = GetCurrentQuickFrameInfo().FrameSizeInBytes();
|
||
|
|
CHECK_NE(frame_size, 0u);
|
||
|
|
// For compiled code, we could try to have a rough guess at an upper size we expect
|
||
|
|
// to see for a frame:
|
||
|
|
// 256 registers
|
||
|
|
// 2 words HandleScope overhead
|
||
|
|
// 3+3 register spills
|
||
|
|
// const size_t kMaxExpectedFrameSize = (256 + 2 + 3 + 3) * sizeof(word);
|
||
|
|
const size_t kMaxExpectedFrameSize = interpreter::kNterpMaxFrame;
|
||
|
|
CHECK_LE(frame_size, kMaxExpectedFrameSize) << method->PrettyMethod();
|
||
|
|
size_t return_pc_offset = GetCurrentQuickFrameInfo().GetReturnPcOffset();
|
||
|
|
CHECK_LT(return_pc_offset, frame_size);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
QuickMethodFrameInfo StackVisitor::GetCurrentQuickFrameInfo() const {
|
||
|
|
if (cur_oat_quick_method_header_ != nullptr) {
|
||
|
|
if (cur_oat_quick_method_header_->IsOptimized()) {
|
||
|
|
return cur_oat_quick_method_header_->GetFrameInfo();
|
||
|
|
} else {
|
||
|
|
DCHECK(cur_oat_quick_method_header_->IsNterpMethodHeader());
|
||
|
|
return NterpFrameInfo(cur_quick_frame_);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ArtMethod* method = GetMethod();
|
||
|
|
Runtime* runtime = Runtime::Current();
|
||
|
|
|
||
|
|
if (method->IsAbstract()) {
|
||
|
|
return RuntimeCalleeSaveFrame::GetMethodFrameInfo(CalleeSaveType::kSaveRefsAndArgs);
|
||
|
|
}
|
||
|
|
|
||
|
|
// This goes before IsProxyMethod since runtime methods have a null declaring class.
|
||
|
|
if (method->IsRuntimeMethod()) {
|
||
|
|
return runtime->GetRuntimeMethodFrameInfo(method);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (method->IsProxyMethod()) {
|
||
|
|
// There is only one direct method of a proxy class: the constructor. A direct method is
|
||
|
|
// cloned from the original java.lang.reflect.Proxy and is executed as usual quick
|
||
|
|
// compiled method without any stubs. Therefore the method must have a OatQuickMethodHeader.
|
||
|
|
DCHECK(!method->IsDirect() && !method->IsConstructor())
|
||
|
|
<< "Constructors of proxy classes must have a OatQuickMethodHeader";
|
||
|
|
return RuntimeCalleeSaveFrame::GetMethodFrameInfo(CalleeSaveType::kSaveRefsAndArgs);
|
||
|
|
}
|
||
|
|
|
||
|
|
// The only remaining cases are for native methods that either
|
||
|
|
// - use the Generic JNI stub, called either directly or through some
|
||
|
|
// (resolution, instrumentation) trampoline; or
|
||
|
|
// - fake a Generic JNI frame in art_jni_dlsym_lookup_critical_stub.
|
||
|
|
DCHECK(method->IsNative());
|
||
|
|
if (kIsDebugBuild && !method->IsCriticalNative()) {
|
||
|
|
ClassLinker* class_linker = runtime->GetClassLinker();
|
||
|
|
const void* entry_point = runtime->GetInstrumentation()->GetQuickCodeFor(method,
|
||
|
|
kRuntimePointerSize);
|
||
|
|
CHECK(class_linker->IsQuickGenericJniStub(entry_point) ||
|
||
|
|
// The current entrypoint (after filtering out trampolines) may have changed
|
||
|
|
// from GenericJNI to JIT-compiled stub since we have entered this frame.
|
||
|
|
(runtime->GetJit() != nullptr &&
|
||
|
|
runtime->GetJit()->GetCodeCache()->ContainsPc(entry_point))) << method->PrettyMethod();
|
||
|
|
}
|
||
|
|
// Generic JNI frame is just like the SaveRefsAndArgs frame.
|
||
|
|
// Note that HandleScope, if any, is below the frame.
|
||
|
|
return RuntimeCalleeSaveFrame::GetMethodFrameInfo(CalleeSaveType::kSaveRefsAndArgs);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <StackVisitor::CountTransitions kCount>
|
||
|
|
void StackVisitor::WalkStack(bool include_transitions) {
|
||
|
|
if (check_suspended_) {
|
||
|
|
DCHECK(thread_ == Thread::Current() || thread_->IsSuspended());
|
||
|
|
}
|
||
|
|
CHECK_EQ(cur_depth_, 0U);
|
||
|
|
size_t inlined_frames_count = 0;
|
||
|
|
|
||
|
|
for (const ManagedStack* current_fragment = thread_->GetManagedStack();
|
||
|
|
current_fragment != nullptr; current_fragment = current_fragment->GetLink()) {
|
||
|
|
cur_shadow_frame_ = current_fragment->GetTopShadowFrame();
|
||
|
|
cur_quick_frame_ = current_fragment->GetTopQuickFrame();
|
||
|
|
cur_quick_frame_pc_ = 0;
|
||
|
|
DCHECK(cur_oat_quick_method_header_ == nullptr);
|
||
|
|
if (cur_quick_frame_ != nullptr) { // Handle quick stack frames.
|
||
|
|
// Can't be both a shadow and a quick fragment.
|
||
|
|
DCHECK(current_fragment->GetTopShadowFrame() == nullptr);
|
||
|
|
ArtMethod* method = *cur_quick_frame_;
|
||
|
|
DCHECK(method != nullptr);
|
||
|
|
bool header_retrieved = false;
|
||
|
|
if (method->IsNative()) {
|
||
|
|
// We do not have a PC for the first frame, so we cannot simply use
|
||
|
|
// ArtMethod::GetOatQuickMethodHeader() as we're unable to distinguish there
|
||
|
|
// between GenericJNI frame and JIT-compiled JNI stub; the entrypoint may have
|
||
|
|
// changed since the frame was entered. The top quick frame tag indicates
|
||
|
|
// GenericJNI here, otherwise it's either AOT-compiled or JNI-compiled JNI stub.
|
||
|
|
if (UNLIKELY(current_fragment->GetTopQuickFrameTag())) {
|
||
|
|
// The generic JNI does not have any method header.
|
||
|
|
cur_oat_quick_method_header_ = nullptr;
|
||
|
|
} else {
|
||
|
|
const void* existing_entry_point = method->GetEntryPointFromQuickCompiledCode();
|
||
|
|
CHECK(existing_entry_point != nullptr);
|
||
|
|
Runtime* runtime = Runtime::Current();
|
||
|
|
ClassLinker* class_linker = runtime->GetClassLinker();
|
||
|
|
// Check whether we can quickly get the header from the current entrypoint.
|
||
|
|
if (!class_linker->IsQuickGenericJniStub(existing_entry_point) &&
|
||
|
|
!class_linker->IsQuickResolutionStub(existing_entry_point) &&
|
||
|
|
existing_entry_point != GetQuickInstrumentationEntryPoint()) {
|
||
|
|
cur_oat_quick_method_header_ =
|
||
|
|
OatQuickMethodHeader::FromEntryPoint(existing_entry_point);
|
||
|
|
} else {
|
||
|
|
const void* code = method->GetOatMethodQuickCode(class_linker->GetImagePointerSize());
|
||
|
|
if (code != nullptr) {
|
||
|
|
cur_oat_quick_method_header_ = OatQuickMethodHeader::FromEntryPoint(code);
|
||
|
|
} else {
|
||
|
|
// This must be a JITted JNI stub frame.
|
||
|
|
CHECK(runtime->GetJit() != nullptr);
|
||
|
|
code = runtime->GetJit()->GetCodeCache()->GetJniStubCode(method);
|
||
|
|
CHECK(code != nullptr) << method->PrettyMethod();
|
||
|
|
cur_oat_quick_method_header_ = OatQuickMethodHeader::FromCodePointer(code);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
header_retrieved = true;
|
||
|
|
}
|
||
|
|
while (method != nullptr) {
|
||
|
|
if (!header_retrieved) {
|
||
|
|
cur_oat_quick_method_header_ = method->GetOatQuickMethodHeader(cur_quick_frame_pc_);
|
||
|
|
}
|
||
|
|
header_retrieved = false; // Force header retrieval in next iteration.
|
||
|
|
ValidateFrame();
|
||
|
|
|
||
|
|
if ((walk_kind_ == StackWalkKind::kIncludeInlinedFrames)
|
||
|
|
&& (cur_oat_quick_method_header_ != nullptr)
|
||
|
|
&& cur_oat_quick_method_header_->IsOptimized()
|
||
|
|
&& !method->IsNative() // JNI methods cannot have any inlined frames.
|
||
|
|
&& CodeInfo::HasInlineInfo(cur_oat_quick_method_header_->GetOptimizedCodeInfoPtr())) {
|
||
|
|
DCHECK_NE(cur_quick_frame_pc_, 0u);
|
||
|
|
CodeInfo* code_info = GetCurrentInlineInfo();
|
||
|
|
StackMap* stack_map = GetCurrentStackMap();
|
||
|
|
if (stack_map->IsValid() && stack_map->HasInlineInfo()) {
|
||
|
|
DCHECK_EQ(current_inline_frames_.size(), 0u);
|
||
|
|
for (current_inline_frames_ = code_info->GetInlineInfosOf(*stack_map);
|
||
|
|
!current_inline_frames_.empty();
|
||
|
|
current_inline_frames_.pop_back()) {
|
||
|
|
bool should_continue = VisitFrame();
|
||
|
|
if (UNLIKELY(!should_continue)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
cur_depth_++;
|
||
|
|
inlined_frames_count++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
bool should_continue = VisitFrame();
|
||
|
|
if (UNLIKELY(!should_continue)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
QuickMethodFrameInfo frame_info = GetCurrentQuickFrameInfo();
|
||
|
|
if (context_ != nullptr) {
|
||
|
|
context_->FillCalleeSaves(reinterpret_cast<uint8_t*>(cur_quick_frame_), frame_info);
|
||
|
|
}
|
||
|
|
// Compute PC for next stack frame from return PC.
|
||
|
|
size_t frame_size = frame_info.FrameSizeInBytes();
|
||
|
|
uintptr_t return_pc_addr = GetReturnPcAddr();
|
||
|
|
uintptr_t return_pc = *reinterpret_cast<uintptr_t*>(return_pc_addr);
|
||
|
|
|
||
|
|
if (UNLIKELY(reinterpret_cast<uintptr_t>(GetQuickInstrumentationExitPc()) == return_pc)) {
|
||
|
|
// While profiling, the return pc is restored from the side stack, except when walking
|
||
|
|
// the stack for an exception where the side stack will be unwound in VisitFrame.
|
||
|
|
const std::map<uintptr_t, instrumentation::InstrumentationStackFrame>&
|
||
|
|
instrumentation_stack = *thread_->GetInstrumentationStack();
|
||
|
|
auto it = instrumentation_stack.find(return_pc_addr);
|
||
|
|
CHECK(it != instrumentation_stack.end());
|
||
|
|
const instrumentation::InstrumentationStackFrame& instrumentation_frame = it->second;
|
||
|
|
if (GetMethod() ==
|
||
|
|
Runtime::Current()->GetCalleeSaveMethod(CalleeSaveType::kSaveAllCalleeSaves)) {
|
||
|
|
// Skip runtime save all callee frames which are used to deliver exceptions.
|
||
|
|
} else if (instrumentation_frame.interpreter_entry_) {
|
||
|
|
ArtMethod* callee =
|
||
|
|
Runtime::Current()->GetCalleeSaveMethod(CalleeSaveType::kSaveRefsAndArgs);
|
||
|
|
CHECK_EQ(GetMethod(), callee) << "Expected: " << ArtMethod::PrettyMethod(callee)
|
||
|
|
<< " Found: " << ArtMethod::PrettyMethod(GetMethod());
|
||
|
|
} else if (!instrumentation_frame.method_->IsRuntimeMethod()) {
|
||
|
|
// Trampolines get replaced with their actual method in the stack,
|
||
|
|
// so don't do the check below for runtime methods.
|
||
|
|
// Instrumentation generally doesn't distinguish between a method's obsolete and
|
||
|
|
// non-obsolete version.
|
||
|
|
CHECK_EQ(instrumentation_frame.method_->GetNonObsoleteMethod(),
|
||
|
|
GetMethod()->GetNonObsoleteMethod())
|
||
|
|
<< "Expected: "
|
||
|
|
<< ArtMethod::PrettyMethod(instrumentation_frame.method_->GetNonObsoleteMethod())
|
||
|
|
<< " Found: " << ArtMethod::PrettyMethod(GetMethod()->GetNonObsoleteMethod());
|
||
|
|
}
|
||
|
|
return_pc = instrumentation_frame.return_pc_;
|
||
|
|
}
|
||
|
|
|
||
|
|
cur_quick_frame_pc_ = return_pc;
|
||
|
|
uint8_t* next_frame = reinterpret_cast<uint8_t*>(cur_quick_frame_) + frame_size;
|
||
|
|
cur_quick_frame_ = reinterpret_cast<ArtMethod**>(next_frame);
|
||
|
|
|
||
|
|
if (kDebugStackWalk) {
|
||
|
|
LOG(INFO) << ArtMethod::PrettyMethod(method) << "@" << method << " size=" << frame_size
|
||
|
|
<< std::boolalpha
|
||
|
|
<< " optimized=" << (cur_oat_quick_method_header_ != nullptr &&
|
||
|
|
cur_oat_quick_method_header_->IsOptimized())
|
||
|
|
<< " native=" << method->IsNative()
|
||
|
|
<< std::noboolalpha
|
||
|
|
<< " entrypoints=" << method->GetEntryPointFromQuickCompiledCode()
|
||
|
|
<< "," << (method->IsNative() ? method->GetEntryPointFromJni() : nullptr)
|
||
|
|
<< " next=" << *cur_quick_frame_;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (kCount == CountTransitions::kYes || !method->IsRuntimeMethod()) {
|
||
|
|
cur_depth_++;
|
||
|
|
}
|
||
|
|
method = *cur_quick_frame_;
|
||
|
|
}
|
||
|
|
// We reached a transition frame, it doesn't have a method header.
|
||
|
|
cur_oat_quick_method_header_ = nullptr;
|
||
|
|
} else if (cur_shadow_frame_ != nullptr) {
|
||
|
|
do {
|
||
|
|
ValidateFrame();
|
||
|
|
bool should_continue = VisitFrame();
|
||
|
|
if (UNLIKELY(!should_continue)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
cur_depth_++;
|
||
|
|
cur_shadow_frame_ = cur_shadow_frame_->GetLink();
|
||
|
|
} while (cur_shadow_frame_ != nullptr);
|
||
|
|
}
|
||
|
|
if (include_transitions) {
|
||
|
|
bool should_continue = VisitFrame();
|
||
|
|
if (!should_continue) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (kCount == CountTransitions::kYes) {
|
||
|
|
cur_depth_++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (num_frames_ != 0) {
|
||
|
|
CHECK_EQ(cur_depth_, num_frames_);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template void StackVisitor::WalkStack<StackVisitor::CountTransitions::kYes>(bool);
|
||
|
|
template void StackVisitor::WalkStack<StackVisitor::CountTransitions::kNo>(bool);
|
||
|
|
|
||
|
|
} // namespace art
|