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1617 lines
67 KiB
1617 lines
67 KiB
/*
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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 "instrumentation.h"
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#include <functional>
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#include <optional>
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#include <sstream>
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#include <android-base/logging.h>
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#include "arch/context.h"
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#include "art_field-inl.h"
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#include "art_method-inl.h"
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#include "base/atomic.h"
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#include "base/callee_save_type.h"
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#include "class_linker.h"
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#include "debugger.h"
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#include "dex/dex_file-inl.h"
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#include "dex/dex_file_types.h"
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#include "dex/dex_instruction-inl.h"
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#include "entrypoints/quick/quick_alloc_entrypoints.h"
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#include "entrypoints/quick/quick_entrypoints.h"
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#include "entrypoints/runtime_asm_entrypoints.h"
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#include "gc_root-inl.h"
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#include "interpreter/interpreter.h"
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#include "interpreter/interpreter_common.h"
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#include "jit/jit.h"
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#include "jit/jit_code_cache.h"
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#include "jvalue-inl.h"
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#include "jvalue.h"
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#include "mirror/class-inl.h"
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#include "mirror/dex_cache.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 "nth_caller_visitor.h"
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#include "oat_quick_method_header.h"
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#include "runtime-inl.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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namespace instrumentation {
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constexpr bool kVerboseInstrumentation = false;
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void InstrumentationListener::MethodExited(
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Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc,
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OptionalFrame frame,
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MutableHandle<mirror::Object>& return_value) {
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DCHECK_EQ(method->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetReturnTypePrimitive(),
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Primitive::kPrimNot);
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const void* original_ret = return_value.Get();
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JValue v;
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v.SetL(return_value.Get());
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MethodExited(thread, this_object, method, dex_pc, frame, v);
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DCHECK(original_ret == v.GetL()) << "Return value changed";
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}
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void InstrumentationListener::FieldWritten(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc,
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ArtField* field,
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Handle<mirror::Object> field_value) {
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DCHECK(!field->IsPrimitiveType());
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JValue v;
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v.SetL(field_value.Get());
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FieldWritten(thread, this_object, method, dex_pc, field, v);
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}
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// Instrumentation works on non-inlined frames by updating returned PCs
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// of compiled frames.
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static constexpr StackVisitor::StackWalkKind kInstrumentationStackWalk =
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StackVisitor::StackWalkKind::kSkipInlinedFrames;
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class InstallStubsClassVisitor : public ClassVisitor {
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public:
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explicit InstallStubsClassVisitor(Instrumentation* instrumentation)
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: instrumentation_(instrumentation) {}
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bool operator()(ObjPtr<mirror::Class> klass) override REQUIRES(Locks::mutator_lock_) {
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instrumentation_->InstallStubsForClass(klass.Ptr());
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return true; // we visit all classes.
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}
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private:
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Instrumentation* const instrumentation_;
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};
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InstrumentationStackPopper::InstrumentationStackPopper(Thread* self)
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: self_(self),
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instrumentation_(Runtime::Current()->GetInstrumentation()),
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pop_until_(0u) {}
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InstrumentationStackPopper::~InstrumentationStackPopper() {
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std::map<uintptr_t, instrumentation::InstrumentationStackFrame>* stack =
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self_->GetInstrumentationStack();
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for (auto i = stack->begin(); i != stack->end() && i->first <= pop_until_;) {
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i = stack->erase(i);
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}
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}
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bool InstrumentationStackPopper::PopFramesTo(uintptr_t stack_pointer,
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MutableHandle<mirror::Throwable>& exception) {
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std::map<uintptr_t, instrumentation::InstrumentationStackFrame>* stack =
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self_->GetInstrumentationStack();
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DCHECK(!self_->IsExceptionPending());
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if (!instrumentation_->HasMethodUnwindListeners()) {
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pop_until_ = stack_pointer;
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return true;
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}
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if (kVerboseInstrumentation) {
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LOG(INFO) << "Popping frames for exception " << exception->Dump();
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}
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// The instrumentation events expect the exception to be set.
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self_->SetException(exception.Get());
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bool new_exception_thrown = false;
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auto i = stack->upper_bound(pop_until_);
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// Now pop all frames until reaching stack_pointer, or a new exception is
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// thrown. Note that `stack_pointer` doesn't need to be a return PC address
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// (in fact the exception handling code passes the start of the frame where
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// the catch handler is).
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for (; i != stack->end() && i->first <= stack_pointer; i++) {
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const InstrumentationStackFrame& frame = i->second;
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ArtMethod* method = frame.method_;
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// Notify listeners of method unwind.
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// TODO: improve the dex_pc information here.
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uint32_t dex_pc = dex::kDexNoIndex;
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if (kVerboseInstrumentation) {
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LOG(INFO) << "Popping for unwind " << method->PrettyMethod();
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}
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if (!method->IsRuntimeMethod() && !frame.interpreter_entry_) {
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instrumentation_->MethodUnwindEvent(self_, frame.this_object_, method, dex_pc);
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new_exception_thrown = self_->GetException() != exception.Get();
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if (new_exception_thrown) {
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pop_until_ = i->first;
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break;
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}
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}
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}
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if (!new_exception_thrown) {
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pop_until_ = stack_pointer;
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}
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exception.Assign(self_->GetException());
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self_->ClearException();
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if (kVerboseInstrumentation && new_exception_thrown) {
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LOG(INFO) << "Did partial pop of frames due to new exception";
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}
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return !new_exception_thrown;
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}
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Instrumentation::Instrumentation()
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: current_force_deopt_id_(0),
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instrumentation_stubs_installed_(false),
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entry_exit_stubs_installed_(false),
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interpreter_stubs_installed_(false),
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interpret_only_(false),
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forced_interpret_only_(false),
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have_method_entry_listeners_(false),
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have_method_exit_listeners_(false),
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have_method_unwind_listeners_(false),
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have_dex_pc_listeners_(false),
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have_field_read_listeners_(false),
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have_field_write_listeners_(false),
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have_exception_thrown_listeners_(false),
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have_watched_frame_pop_listeners_(false),
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have_branch_listeners_(false),
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have_exception_handled_listeners_(false),
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deoptimized_methods_lock_(new ReaderWriterMutex("deoptimized methods lock",
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kGenericBottomLock)),
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deoptimization_enabled_(false),
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interpreter_handler_table_(kMainHandlerTable),
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quick_alloc_entry_points_instrumentation_counter_(0),
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alloc_entrypoints_instrumented_(false),
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can_use_instrumentation_trampolines_(true) {
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}
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void Instrumentation::InstallStubsForClass(ObjPtr<mirror::Class> klass) {
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if (!klass->IsResolved()) {
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// We need the class to be resolved to install/uninstall stubs. Otherwise its methods
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// could not be initialized or linked with regards to class inheritance.
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} else if (klass->IsErroneousResolved()) {
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// We can't execute code in a erroneous class: do nothing.
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} else {
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for (ArtMethod& method : klass->GetMethods(kRuntimePointerSize)) {
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InstallStubsForMethod(&method);
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}
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}
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}
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static void UpdateEntrypoints(ArtMethod* method, const void* quick_code)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (kIsDebugBuild) {
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jit::Jit* jit = Runtime::Current()->GetJit();
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if (jit != nullptr && jit->GetCodeCache()->ContainsPc(quick_code)) {
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// Ensure we always have the thumb entrypoint for JIT on arm32.
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if (kRuntimeISA == InstructionSet::kArm) {
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CHECK_EQ(reinterpret_cast<uintptr_t>(quick_code) & 1, 1u);
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}
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}
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}
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method->SetEntryPointFromQuickCompiledCode(quick_code);
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}
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bool Instrumentation::NeedDebugVersionFor(ArtMethod* method) const
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REQUIRES_SHARED(Locks::mutator_lock_) {
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art::Runtime* runtime = Runtime::Current();
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// If anything says we need the debug version or we are debuggable we will need the debug version
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// of the method.
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return (runtime->GetRuntimeCallbacks()->MethodNeedsDebugVersion(method) ||
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runtime->IsJavaDebuggable()) &&
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!method->IsNative() &&
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!method->IsProxyMethod();
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}
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void Instrumentation::InstallStubsForMethod(ArtMethod* method) {
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if (!method->IsInvokable() || method->IsProxyMethod()) {
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// Do not change stubs for these methods.
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return;
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}
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// Don't stub Proxy.<init>. Note that the Proxy class itself is not a proxy class.
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// TODO We should remove the need for this since it means we cannot always correctly detect calls
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// to Proxy.<init>
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// Annoyingly this can be called before we have actually initialized WellKnownClasses so therefore
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// we also need to check this based on the declaring-class descriptor. The check is valid because
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// Proxy only has a single constructor.
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ArtMethod* well_known_proxy_init = jni::DecodeArtMethod(
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WellKnownClasses::java_lang_reflect_Proxy_init);
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if ((LIKELY(well_known_proxy_init != nullptr) && UNLIKELY(method == well_known_proxy_init)) ||
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UNLIKELY(method->IsConstructor() &&
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method->GetDeclaringClass()->DescriptorEquals("Ljava/lang/reflect/Proxy;"))) {
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return;
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}
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const void* new_quick_code;
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bool uninstall = !entry_exit_stubs_installed_ && !interpreter_stubs_installed_;
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Runtime* const runtime = Runtime::Current();
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ClassLinker* const class_linker = runtime->GetClassLinker();
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bool is_class_initialized = method->GetDeclaringClass()->IsInitialized();
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if (uninstall) {
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if ((forced_interpret_only_ || IsDeoptimized(method)) && !method->IsNative()) {
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new_quick_code = GetQuickToInterpreterBridge();
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} else if (is_class_initialized || !method->IsStatic() || method->IsConstructor()) {
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new_quick_code = GetCodeForInvoke(method);
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} else {
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new_quick_code = GetQuickResolutionStub();
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}
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} else { // !uninstall
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if ((interpreter_stubs_installed_ || forced_interpret_only_ || IsDeoptimized(method)) &&
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!method->IsNative()) {
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new_quick_code = GetQuickToInterpreterBridge();
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} else {
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// Do not overwrite resolution trampoline. When the trampoline initializes the method's
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// class, all its static methods code will be set to the instrumentation entry point.
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// For more details, see ClassLinker::FixupStaticTrampolines.
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if (is_class_initialized || !method->IsStatic() || method->IsConstructor()) {
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if (entry_exit_stubs_installed_) {
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// This needs to be checked first since the instrumentation entrypoint will be able to
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// find the actual JIT compiled code that corresponds to this method.
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new_quick_code = GetQuickInstrumentationEntryPoint();
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} else if (NeedDebugVersionFor(method)) {
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// It would be great to search the JIT for its implementation here but we cannot due to
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// the locks we hold. Instead just set to the interpreter bridge and that code will search
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// the JIT when it gets called and replace the entrypoint then.
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new_quick_code = GetQuickToInterpreterBridge();
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} else {
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new_quick_code = class_linker->GetQuickOatCodeFor(method);
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}
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} else {
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new_quick_code = GetQuickResolutionStub();
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}
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}
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}
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UpdateEntrypoints(method, new_quick_code);
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}
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// Places the instrumentation exit pc as the return PC for every quick frame. This also allows
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// deoptimization of quick frames to interpreter frames.
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// Since we may already have done this previously, we need to push new instrumentation frame before
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// existing instrumentation frames.
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void InstrumentationInstallStack(Thread* thread, void* arg)
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REQUIRES(Locks::mutator_lock_) {
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Locks::mutator_lock_->AssertExclusiveHeld(Thread::Current());
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struct InstallStackVisitor final : public StackVisitor {
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InstallStackVisitor(Thread* thread_in,
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Context* context,
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uintptr_t instrumentation_exit_pc,
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uint64_t force_deopt_id)
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: StackVisitor(thread_in, context, kInstrumentationStackWalk),
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instrumentation_stack_(thread_in->GetInstrumentationStack()),
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instrumentation_exit_pc_(instrumentation_exit_pc),
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reached_existing_instrumentation_frames_(false),
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last_return_pc_(0),
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force_deopt_id_(force_deopt_id) {}
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bool VisitFrame() override REQUIRES_SHARED(Locks::mutator_lock_) {
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ArtMethod* m = GetMethod();
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if (m == nullptr) {
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if (kVerboseInstrumentation) {
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LOG(INFO) << " Skipping upcall. Frame " << GetFrameId();
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}
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last_return_pc_ = 0;
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return true; // Ignore upcalls.
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}
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if (GetCurrentQuickFrame() == nullptr) {
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bool interpreter_frame = true;
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InstrumentationStackFrame instrumentation_frame(GetThisObject().Ptr(),
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m,
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/*return_pc=*/ 0,
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GetFrameId(),
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interpreter_frame,
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force_deopt_id_);
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if (kVerboseInstrumentation) {
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LOG(INFO) << "Pushing shadow frame " << instrumentation_frame.Dump();
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}
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shadow_stack_.push_back(instrumentation_frame);
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return true; // Continue.
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}
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uintptr_t return_pc = GetReturnPc();
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if (kVerboseInstrumentation) {
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LOG(INFO) << " Installing exit stub in " << DescribeLocation();
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}
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if (return_pc == instrumentation_exit_pc_) {
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auto it = instrumentation_stack_->find(GetReturnPcAddr());
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CHECK(it != instrumentation_stack_->end());
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const InstrumentationStackFrame& frame = it->second;
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if (m->IsRuntimeMethod()) {
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if (frame.interpreter_entry_) {
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// This instrumentation frame is for an interpreter bridge and is
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// pushed when executing the instrumented interpreter bridge. So method
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// enter event must have been reported. However we need to push a DEX pc
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// into the dex_pcs_ list to match size of instrumentation stack.
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uint32_t dex_pc = dex::kDexNoIndex;
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dex_pcs_.push_back(dex_pc);
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last_return_pc_ = frame.return_pc_;
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return true;
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}
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}
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// We've reached a frame which has already been installed with instrumentation exit stub.
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// We should have already installed instrumentation or be interpreter on previous frames.
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reached_existing_instrumentation_frames_ = true;
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CHECK_EQ(m->GetNonObsoleteMethod(), frame.method_->GetNonObsoleteMethod())
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<< "Expected " << ArtMethod::PrettyMethod(m)
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<< ", Found " << ArtMethod::PrettyMethod(frame.method_);
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return_pc = frame.return_pc_;
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if (kVerboseInstrumentation) {
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LOG(INFO) << "Ignoring already instrumented " << frame.Dump();
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}
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} else {
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CHECK_NE(return_pc, 0U);
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if (UNLIKELY(reached_existing_instrumentation_frames_ && !m->IsRuntimeMethod())) {
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// We already saw an existing instrumentation frame so this should be a runtime-method
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// inserted by the interpreter or runtime.
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std::string thread_name;
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GetThread()->GetThreadName(thread_name);
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uint32_t dex_pc = dex::kDexNoIndex;
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if (last_return_pc_ != 0 && GetCurrentOatQuickMethodHeader() != nullptr) {
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dex_pc = GetCurrentOatQuickMethodHeader()->ToDexPc(
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GetCurrentQuickFrame(), last_return_pc_);
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}
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LOG(FATAL) << "While walking " << thread_name << " found unexpected non-runtime method"
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<< " without instrumentation exit return or interpreter frame."
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<< " method is " << GetMethod()->PrettyMethod()
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<< " return_pc is " << std::hex << return_pc
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<< " dex pc: " << dex_pc;
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UNREACHABLE();
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}
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InstrumentationStackFrame instrumentation_frame(
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m->IsRuntimeMethod() ? nullptr : GetThisObject().Ptr(),
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m,
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return_pc,
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GetFrameId(), // A runtime method still gets a frame id.
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false,
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force_deopt_id_);
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if (kVerboseInstrumentation) {
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LOG(INFO) << "Pushing frame " << instrumentation_frame.Dump();
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}
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instrumentation_stack_->insert({GetReturnPcAddr(), instrumentation_frame});
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SetReturnPc(instrumentation_exit_pc_);
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}
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uint32_t dex_pc = dex::kDexNoIndex;
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if (last_return_pc_ != 0 && GetCurrentOatQuickMethodHeader() != nullptr) {
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dex_pc = GetCurrentOatQuickMethodHeader()->ToDexPc(GetCurrentQuickFrame(), last_return_pc_);
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}
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dex_pcs_.push_back(dex_pc);
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last_return_pc_ = return_pc;
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return true; // Continue.
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}
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std::map<uintptr_t, InstrumentationStackFrame>* const instrumentation_stack_;
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std::vector<InstrumentationStackFrame> shadow_stack_;
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std::vector<uint32_t> dex_pcs_;
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const uintptr_t instrumentation_exit_pc_;
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bool reached_existing_instrumentation_frames_;
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uintptr_t last_return_pc_;
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uint64_t force_deopt_id_;
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};
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if (kVerboseInstrumentation) {
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std::string thread_name;
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thread->GetThreadName(thread_name);
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LOG(INFO) << "Installing exit stubs in " << thread_name;
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}
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Instrumentation* instrumentation = reinterpret_cast<Instrumentation*>(arg);
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std::unique_ptr<Context> context(Context::Create());
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uintptr_t instrumentation_exit_pc = reinterpret_cast<uintptr_t>(GetQuickInstrumentationExitPc());
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InstallStackVisitor visitor(
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thread, context.get(), instrumentation_exit_pc, instrumentation->current_force_deopt_id_);
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visitor.WalkStack(true);
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CHECK_EQ(visitor.dex_pcs_.size(), thread->GetInstrumentationStack()->size());
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if (instrumentation->ShouldNotifyMethodEnterExitEvents()) {
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// Create method enter events for all methods currently on the thread's stack. We only do this
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// if no debugger is attached to prevent from posting events twice.
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// TODO: This is the only place we make use of frame_id_. We should create a
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// std::vector instead and populate it as we walk the stack.
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auto ssi = visitor.shadow_stack_.rbegin();
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for (auto isi = thread->GetInstrumentationStack()->rbegin(),
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end = thread->GetInstrumentationStack()->rend(); isi != end; ++isi) {
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while (ssi != visitor.shadow_stack_.rend() && (*ssi).frame_id_ < isi->second.frame_id_) {
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instrumentation->MethodEnterEvent(thread, (*ssi).this_object_, (*ssi).method_, 0);
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++ssi;
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}
|
|
uint32_t dex_pc = visitor.dex_pcs_.back();
|
|
visitor.dex_pcs_.pop_back();
|
|
if (!isi->second.interpreter_entry_ && !isi->second.method_->IsRuntimeMethod()) {
|
|
instrumentation->MethodEnterEvent(
|
|
thread, isi->second.this_object_, isi->second.method_, dex_pc);
|
|
}
|
|
}
|
|
}
|
|
thread->VerifyStack();
|
|
}
|
|
|
|
void Instrumentation::InstrumentThreadStack(Thread* thread) {
|
|
instrumentation_stubs_installed_ = true;
|
|
InstrumentationInstallStack(thread, this);
|
|
}
|
|
|
|
// Removes the instrumentation exit pc as the return PC for every quick frame.
|
|
static void InstrumentationRestoreStack(Thread* thread, void* arg)
|
|
REQUIRES(Locks::mutator_lock_) {
|
|
Locks::mutator_lock_->AssertExclusiveHeld(Thread::Current());
|
|
|
|
struct RestoreStackVisitor final : public StackVisitor {
|
|
RestoreStackVisitor(Thread* thread_in, uintptr_t instrumentation_exit_pc,
|
|
Instrumentation* instrumentation)
|
|
: StackVisitor(thread_in, nullptr, kInstrumentationStackWalk),
|
|
thread_(thread_in),
|
|
instrumentation_exit_pc_(instrumentation_exit_pc),
|
|
instrumentation_(instrumentation),
|
|
instrumentation_stack_(thread_in->GetInstrumentationStack()),
|
|
frames_removed_(0) {}
|
|
|
|
bool VisitFrame() override REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
if (instrumentation_stack_->size() == 0) {
|
|
return false; // Stop.
|
|
}
|
|
ArtMethod* m = GetMethod();
|
|
if (GetCurrentQuickFrame() == nullptr) {
|
|
if (kVerboseInstrumentation) {
|
|
LOG(INFO) << " Ignoring a shadow frame. Frame " << GetFrameId()
|
|
<< " Method=" << ArtMethod::PrettyMethod(m);
|
|
}
|
|
return true; // Ignore shadow frames.
|
|
}
|
|
if (m == nullptr) {
|
|
if (kVerboseInstrumentation) {
|
|
LOG(INFO) << " Skipping upcall. Frame " << GetFrameId();
|
|
}
|
|
return true; // Ignore upcalls.
|
|
}
|
|
auto it = instrumentation_stack_->find(GetReturnPcAddr());
|
|
if (it != instrumentation_stack_->end()) {
|
|
const InstrumentationStackFrame& instrumentation_frame = it->second;
|
|
if (kVerboseInstrumentation) {
|
|
LOG(INFO) << " Removing exit stub in " << DescribeLocation();
|
|
}
|
|
if (instrumentation_frame.interpreter_entry_) {
|
|
CHECK(m == Runtime::Current()->GetCalleeSaveMethod(CalleeSaveType::kSaveRefsAndArgs));
|
|
} else {
|
|
CHECK_EQ(m->GetNonObsoleteMethod(),
|
|
instrumentation_frame.method_->GetNonObsoleteMethod())
|
|
<< ArtMethod::PrettyMethod(m)
|
|
<< " and " << instrumentation_frame.method_->GetNonObsoleteMethod()->PrettyMethod();
|
|
}
|
|
SetReturnPc(instrumentation_frame.return_pc_);
|
|
if (instrumentation_->ShouldNotifyMethodEnterExitEvents() &&
|
|
!m->IsRuntimeMethod()) {
|
|
// Create the method exit events. As the methods didn't really exit the result is 0.
|
|
// We only do this if no debugger is attached to prevent from posting events twice.
|
|
JValue val;
|
|
instrumentation_->MethodExitEvent(thread_, instrumentation_frame.this_object_, m,
|
|
GetDexPc(), OptionalFrame{}, val);
|
|
}
|
|
frames_removed_++;
|
|
} else {
|
|
if (kVerboseInstrumentation) {
|
|
LOG(INFO) << " No exit stub in " << DescribeLocation();
|
|
}
|
|
}
|
|
return true; // Continue.
|
|
}
|
|
Thread* const thread_;
|
|
const uintptr_t instrumentation_exit_pc_;
|
|
Instrumentation* const instrumentation_;
|
|
std::map<uintptr_t, instrumentation::InstrumentationStackFrame>* const instrumentation_stack_;
|
|
size_t frames_removed_;
|
|
};
|
|
if (kVerboseInstrumentation) {
|
|
std::string thread_name;
|
|
thread->GetThreadName(thread_name);
|
|
LOG(INFO) << "Removing exit stubs in " << thread_name;
|
|
}
|
|
std::map<uintptr_t, instrumentation::InstrumentationStackFrame>* stack =
|
|
thread->GetInstrumentationStack();
|
|
if (stack->size() > 0) {
|
|
Instrumentation* instrumentation = reinterpret_cast<Instrumentation*>(arg);
|
|
uintptr_t instrumentation_exit_pc =
|
|
reinterpret_cast<uintptr_t>(GetQuickInstrumentationExitPc());
|
|
RestoreStackVisitor visitor(thread, instrumentation_exit_pc, instrumentation);
|
|
visitor.WalkStack(true);
|
|
CHECK_EQ(visitor.frames_removed_, stack->size());
|
|
stack->clear();
|
|
}
|
|
}
|
|
|
|
void Instrumentation::DeoptimizeAllThreadFrames() {
|
|
Thread* self = Thread::Current();
|
|
MutexLock mu(self, *Locks::thread_list_lock_);
|
|
ThreadList* tl = Runtime::Current()->GetThreadList();
|
|
tl->ForEach([&](Thread* t) {
|
|
Locks::mutator_lock_->AssertExclusiveHeld(self);
|
|
InstrumentThreadStack(t);
|
|
});
|
|
current_force_deopt_id_++;
|
|
}
|
|
|
|
static bool HasEvent(Instrumentation::InstrumentationEvent expected, uint32_t events) {
|
|
return (events & expected) != 0;
|
|
}
|
|
|
|
static void PotentiallyAddListenerTo(Instrumentation::InstrumentationEvent event,
|
|
uint32_t events,
|
|
std::list<InstrumentationListener*>& list,
|
|
InstrumentationListener* listener,
|
|
bool* has_listener)
|
|
REQUIRES(Locks::mutator_lock_, !Locks::thread_list_lock_, !Locks::classlinker_classes_lock_) {
|
|
Locks::mutator_lock_->AssertExclusiveHeld(Thread::Current());
|
|
if (!HasEvent(event, events)) {
|
|
return;
|
|
}
|
|
// If there is a free slot in the list, we insert the listener in that slot.
|
|
// Otherwise we add it to the end of the list.
|
|
auto it = std::find(list.begin(), list.end(), nullptr);
|
|
if (it != list.end()) {
|
|
*it = listener;
|
|
} else {
|
|
list.push_back(listener);
|
|
}
|
|
Runtime::DoAndMaybeSwitchInterpreter([=](){ *has_listener = true; });
|
|
}
|
|
|
|
void Instrumentation::AddListener(InstrumentationListener* listener, uint32_t events) {
|
|
Locks::mutator_lock_->AssertExclusiveHeld(Thread::Current());
|
|
PotentiallyAddListenerTo(kMethodEntered,
|
|
events,
|
|
method_entry_listeners_,
|
|
listener,
|
|
&have_method_entry_listeners_);
|
|
PotentiallyAddListenerTo(kMethodExited,
|
|
events,
|
|
method_exit_listeners_,
|
|
listener,
|
|
&have_method_exit_listeners_);
|
|
PotentiallyAddListenerTo(kMethodUnwind,
|
|
events,
|
|
method_unwind_listeners_,
|
|
listener,
|
|
&have_method_unwind_listeners_);
|
|
PotentiallyAddListenerTo(kBranch,
|
|
events,
|
|
branch_listeners_,
|
|
listener,
|
|
&have_branch_listeners_);
|
|
PotentiallyAddListenerTo(kDexPcMoved,
|
|
events,
|
|
dex_pc_listeners_,
|
|
listener,
|
|
&have_dex_pc_listeners_);
|
|
PotentiallyAddListenerTo(kFieldRead,
|
|
events,
|
|
field_read_listeners_,
|
|
listener,
|
|
&have_field_read_listeners_);
|
|
PotentiallyAddListenerTo(kFieldWritten,
|
|
events,
|
|
field_write_listeners_,
|
|
listener,
|
|
&have_field_write_listeners_);
|
|
PotentiallyAddListenerTo(kExceptionThrown,
|
|
events,
|
|
exception_thrown_listeners_,
|
|
listener,
|
|
&have_exception_thrown_listeners_);
|
|
PotentiallyAddListenerTo(kWatchedFramePop,
|
|
events,
|
|
watched_frame_pop_listeners_,
|
|
listener,
|
|
&have_watched_frame_pop_listeners_);
|
|
PotentiallyAddListenerTo(kExceptionHandled,
|
|
events,
|
|
exception_handled_listeners_,
|
|
listener,
|
|
&have_exception_handled_listeners_);
|
|
UpdateInterpreterHandlerTable();
|
|
}
|
|
|
|
static void PotentiallyRemoveListenerFrom(Instrumentation::InstrumentationEvent event,
|
|
uint32_t events,
|
|
std::list<InstrumentationListener*>& list,
|
|
InstrumentationListener* listener,
|
|
bool* has_listener)
|
|
REQUIRES(Locks::mutator_lock_, !Locks::thread_list_lock_, !Locks::classlinker_classes_lock_) {
|
|
Locks::mutator_lock_->AssertExclusiveHeld(Thread::Current());
|
|
if (!HasEvent(event, events)) {
|
|
return;
|
|
}
|
|
auto it = std::find(list.begin(), list.end(), listener);
|
|
if (it != list.end()) {
|
|
// Just update the entry, do not remove from the list. Removing entries in the list
|
|
// is unsafe when mutators are iterating over it.
|
|
*it = nullptr;
|
|
}
|
|
|
|
// Check if the list contains any non-null listener, and update 'has_listener'.
|
|
for (InstrumentationListener* l : list) {
|
|
if (l != nullptr) {
|
|
Runtime::DoAndMaybeSwitchInterpreter([=](){ *has_listener = true; });
|
|
return;
|
|
}
|
|
}
|
|
Runtime::DoAndMaybeSwitchInterpreter([=](){ *has_listener = false; });
|
|
}
|
|
|
|
void Instrumentation::RemoveListener(InstrumentationListener* listener, uint32_t events) {
|
|
Locks::mutator_lock_->AssertExclusiveHeld(Thread::Current());
|
|
PotentiallyRemoveListenerFrom(kMethodEntered,
|
|
events,
|
|
method_entry_listeners_,
|
|
listener,
|
|
&have_method_entry_listeners_);
|
|
PotentiallyRemoveListenerFrom(kMethodExited,
|
|
events,
|
|
method_exit_listeners_,
|
|
listener,
|
|
&have_method_exit_listeners_);
|
|
PotentiallyRemoveListenerFrom(kMethodUnwind,
|
|
events,
|
|
method_unwind_listeners_,
|
|
listener,
|
|
&have_method_unwind_listeners_);
|
|
PotentiallyRemoveListenerFrom(kBranch,
|
|
events,
|
|
branch_listeners_,
|
|
listener,
|
|
&have_branch_listeners_);
|
|
PotentiallyRemoveListenerFrom(kDexPcMoved,
|
|
events,
|
|
dex_pc_listeners_,
|
|
listener,
|
|
&have_dex_pc_listeners_);
|
|
PotentiallyRemoveListenerFrom(kFieldRead,
|
|
events,
|
|
field_read_listeners_,
|
|
listener,
|
|
&have_field_read_listeners_);
|
|
PotentiallyRemoveListenerFrom(kFieldWritten,
|
|
events,
|
|
field_write_listeners_,
|
|
listener,
|
|
&have_field_write_listeners_);
|
|
PotentiallyRemoveListenerFrom(kExceptionThrown,
|
|
events,
|
|
exception_thrown_listeners_,
|
|
listener,
|
|
&have_exception_thrown_listeners_);
|
|
PotentiallyRemoveListenerFrom(kWatchedFramePop,
|
|
events,
|
|
watched_frame_pop_listeners_,
|
|
listener,
|
|
&have_watched_frame_pop_listeners_);
|
|
PotentiallyRemoveListenerFrom(kExceptionHandled,
|
|
events,
|
|
exception_handled_listeners_,
|
|
listener,
|
|
&have_exception_handled_listeners_);
|
|
UpdateInterpreterHandlerTable();
|
|
}
|
|
|
|
Instrumentation::InstrumentationLevel Instrumentation::GetCurrentInstrumentationLevel() const {
|
|
if (interpreter_stubs_installed_) {
|
|
return InstrumentationLevel::kInstrumentWithInterpreter;
|
|
} else if (entry_exit_stubs_installed_) {
|
|
return InstrumentationLevel::kInstrumentWithInstrumentationStubs;
|
|
} else {
|
|
return InstrumentationLevel::kInstrumentNothing;
|
|
}
|
|
}
|
|
|
|
bool Instrumentation::RequiresInstrumentationInstallation(InstrumentationLevel new_level) const {
|
|
// We need to reinstall instrumentation if we go to a different level.
|
|
return GetCurrentInstrumentationLevel() != new_level;
|
|
}
|
|
|
|
void Instrumentation::UpdateInstrumentationLevels(InstrumentationLevel level) {
|
|
if (level == InstrumentationLevel::kInstrumentWithInterpreter) {
|
|
can_use_instrumentation_trampolines_ = false;
|
|
}
|
|
if (UNLIKELY(!can_use_instrumentation_trampolines_)) {
|
|
for (auto& p : requested_instrumentation_levels_) {
|
|
if (p.second == InstrumentationLevel::kInstrumentWithInstrumentationStubs) {
|
|
p.second = InstrumentationLevel::kInstrumentWithInterpreter;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void Instrumentation::ConfigureStubs(const char* key, InstrumentationLevel desired_level) {
|
|
// Store the instrumentation level for this key or remove it.
|
|
if (desired_level == InstrumentationLevel::kInstrumentNothing) {
|
|
// The client no longer needs instrumentation.
|
|
requested_instrumentation_levels_.erase(key);
|
|
} else {
|
|
// The client needs instrumentation.
|
|
requested_instrumentation_levels_.Overwrite(key, desired_level);
|
|
}
|
|
|
|
UpdateInstrumentationLevels(desired_level);
|
|
UpdateStubs();
|
|
}
|
|
|
|
void Instrumentation::EnableSingleThreadDeopt() {
|
|
// Single-thread deopt only uses interpreter.
|
|
can_use_instrumentation_trampolines_ = false;
|
|
UpdateInstrumentationLevels(InstrumentationLevel::kInstrumentWithInterpreter);
|
|
UpdateStubs();
|
|
}
|
|
|
|
void Instrumentation::UpdateStubs() {
|
|
// Look for the highest required instrumentation level.
|
|
InstrumentationLevel requested_level = InstrumentationLevel::kInstrumentNothing;
|
|
for (const auto& v : requested_instrumentation_levels_) {
|
|
requested_level = std::max(requested_level, v.second);
|
|
}
|
|
|
|
DCHECK(can_use_instrumentation_trampolines_ ||
|
|
requested_level != InstrumentationLevel::kInstrumentWithInstrumentationStubs)
|
|
<< "Use trampolines: " << can_use_instrumentation_trampolines_ << " level "
|
|
<< requested_level;
|
|
|
|
interpret_only_ = (requested_level == InstrumentationLevel::kInstrumentWithInterpreter) ||
|
|
forced_interpret_only_;
|
|
|
|
if (!RequiresInstrumentationInstallation(requested_level)) {
|
|
// We're already set.
|
|
return;
|
|
}
|
|
Thread* const self = Thread::Current();
|
|
Runtime* runtime = Runtime::Current();
|
|
Locks::mutator_lock_->AssertExclusiveHeld(self);
|
|
Locks::thread_list_lock_->AssertNotHeld(self);
|
|
if (requested_level > InstrumentationLevel::kInstrumentNothing) {
|
|
if (requested_level == InstrumentationLevel::kInstrumentWithInterpreter) {
|
|
interpreter_stubs_installed_ = true;
|
|
entry_exit_stubs_installed_ = true;
|
|
} else {
|
|
CHECK_EQ(requested_level, InstrumentationLevel::kInstrumentWithInstrumentationStubs);
|
|
entry_exit_stubs_installed_ = true;
|
|
interpreter_stubs_installed_ = false;
|
|
}
|
|
InstallStubsClassVisitor visitor(this);
|
|
runtime->GetClassLinker()->VisitClasses(&visitor);
|
|
instrumentation_stubs_installed_ = true;
|
|
MutexLock mu(self, *Locks::thread_list_lock_);
|
|
runtime->GetThreadList()->ForEach(InstrumentationInstallStack, this);
|
|
} else {
|
|
interpreter_stubs_installed_ = false;
|
|
entry_exit_stubs_installed_ = false;
|
|
InstallStubsClassVisitor visitor(this);
|
|
runtime->GetClassLinker()->VisitClasses(&visitor);
|
|
// Restore stack only if there is no method currently deoptimized.
|
|
bool empty;
|
|
{
|
|
ReaderMutexLock mu(self, *GetDeoptimizedMethodsLock());
|
|
empty = IsDeoptimizedMethodsEmpty(); // Avoid lock violation.
|
|
}
|
|
if (empty) {
|
|
MutexLock mu(self, *Locks::thread_list_lock_);
|
|
bool no_remaining_deopts = true;
|
|
// Check that there are no other forced deoptimizations. Do it here so we only need to lock
|
|
// thread_list_lock once.
|
|
// The compiler gets confused on the thread annotations, so use
|
|
// NO_THREAD_SAFETY_ANALYSIS. Note that we hold the mutator lock
|
|
// exclusively at this point.
|
|
Locks::mutator_lock_->AssertExclusiveHeld(self);
|
|
runtime->GetThreadList()->ForEach([&](Thread* t) NO_THREAD_SAFETY_ANALYSIS {
|
|
no_remaining_deopts =
|
|
no_remaining_deopts && !t->IsForceInterpreter() &&
|
|
std::all_of(t->GetInstrumentationStack()->cbegin(),
|
|
t->GetInstrumentationStack()->cend(),
|
|
[&](const auto& frame) REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
return frame.second.force_deopt_id_ == current_force_deopt_id_;
|
|
});
|
|
});
|
|
if (no_remaining_deopts) {
|
|
Runtime::Current()->GetThreadList()->ForEach(InstrumentationRestoreStack, this);
|
|
// Only do this after restoring, as walking the stack when restoring will see
|
|
// the instrumentation exit pc.
|
|
instrumentation_stubs_installed_ = false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ResetQuickAllocEntryPointsForThread(Thread* thread, void* arg ATTRIBUTE_UNUSED) {
|
|
thread->ResetQuickAllocEntryPointsForThread();
|
|
}
|
|
|
|
void Instrumentation::SetEntrypointsInstrumented(bool instrumented) {
|
|
Thread* self = Thread::Current();
|
|
Runtime* runtime = Runtime::Current();
|
|
Locks::mutator_lock_->AssertNotHeld(self);
|
|
Locks::instrument_entrypoints_lock_->AssertHeld(self);
|
|
if (runtime->IsStarted()) {
|
|
ScopedSuspendAll ssa(__FUNCTION__);
|
|
MutexLock mu(self, *Locks::runtime_shutdown_lock_);
|
|
SetQuickAllocEntryPointsInstrumented(instrumented);
|
|
ResetQuickAllocEntryPoints();
|
|
alloc_entrypoints_instrumented_ = instrumented;
|
|
} else {
|
|
MutexLock mu(self, *Locks::runtime_shutdown_lock_);
|
|
SetQuickAllocEntryPointsInstrumented(instrumented);
|
|
|
|
// Note: ResetQuickAllocEntryPoints only works when the runtime is started. Manually run the
|
|
// update for just this thread.
|
|
// Note: self may be null. One of those paths is setting instrumentation in the Heap
|
|
// constructor for gcstress mode.
|
|
if (self != nullptr) {
|
|
ResetQuickAllocEntryPointsForThread(self, nullptr);
|
|
}
|
|
|
|
alloc_entrypoints_instrumented_ = instrumented;
|
|
}
|
|
}
|
|
|
|
void Instrumentation::InstrumentQuickAllocEntryPoints() {
|
|
MutexLock mu(Thread::Current(), *Locks::instrument_entrypoints_lock_);
|
|
InstrumentQuickAllocEntryPointsLocked();
|
|
}
|
|
|
|
void Instrumentation::UninstrumentQuickAllocEntryPoints() {
|
|
MutexLock mu(Thread::Current(), *Locks::instrument_entrypoints_lock_);
|
|
UninstrumentQuickAllocEntryPointsLocked();
|
|
}
|
|
|
|
void Instrumentation::InstrumentQuickAllocEntryPointsLocked() {
|
|
Locks::instrument_entrypoints_lock_->AssertHeld(Thread::Current());
|
|
if (quick_alloc_entry_points_instrumentation_counter_ == 0) {
|
|
SetEntrypointsInstrumented(true);
|
|
}
|
|
++quick_alloc_entry_points_instrumentation_counter_;
|
|
}
|
|
|
|
void Instrumentation::UninstrumentQuickAllocEntryPointsLocked() {
|
|
Locks::instrument_entrypoints_lock_->AssertHeld(Thread::Current());
|
|
CHECK_GT(quick_alloc_entry_points_instrumentation_counter_, 0U);
|
|
--quick_alloc_entry_points_instrumentation_counter_;
|
|
if (quick_alloc_entry_points_instrumentation_counter_ == 0) {
|
|
SetEntrypointsInstrumented(false);
|
|
}
|
|
}
|
|
|
|
void Instrumentation::ResetQuickAllocEntryPoints() {
|
|
Runtime* runtime = Runtime::Current();
|
|
if (runtime->IsStarted()) {
|
|
MutexLock mu(Thread::Current(), *Locks::thread_list_lock_);
|
|
runtime->GetThreadList()->ForEach(ResetQuickAllocEntryPointsForThread, nullptr);
|
|
}
|
|
}
|
|
|
|
void Instrumentation::UpdateMethodsCodeImpl(ArtMethod* method, const void* quick_code) {
|
|
const void* new_quick_code;
|
|
if (LIKELY(!instrumentation_stubs_installed_)) {
|
|
new_quick_code = quick_code;
|
|
} else {
|
|
if ((interpreter_stubs_installed_ || IsDeoptimized(method)) && !method->IsNative()) {
|
|
new_quick_code = GetQuickToInterpreterBridge();
|
|
} else {
|
|
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
|
|
if (class_linker->IsQuickResolutionStub(quick_code) ||
|
|
class_linker->IsQuickToInterpreterBridge(quick_code)) {
|
|
new_quick_code = quick_code;
|
|
} else if (entry_exit_stubs_installed_ &&
|
|
// We need to make sure not to replace anything that InstallStubsForMethod
|
|
// wouldn't. Specifically we cannot stub out Proxy.<init> since subtypes copy the
|
|
// implementation directly and this will confuse the instrumentation trampolines.
|
|
// TODO We should remove the need for this since it makes it impossible to profile
|
|
// Proxy.<init> correctly in all cases.
|
|
method != jni::DecodeArtMethod(WellKnownClasses::java_lang_reflect_Proxy_init)) {
|
|
new_quick_code = GetQuickInstrumentationEntryPoint();
|
|
} else {
|
|
new_quick_code = quick_code;
|
|
}
|
|
}
|
|
}
|
|
UpdateEntrypoints(method, new_quick_code);
|
|
}
|
|
|
|
void Instrumentation::UpdateNativeMethodsCodeToJitCode(ArtMethod* method, const void* quick_code) {
|
|
// We don't do any read barrier on `method`'s declaring class in this code, as the JIT might
|
|
// enter here on a soon-to-be deleted ArtMethod. Updating the entrypoint is OK though, as
|
|
// the ArtMethod is still in memory.
|
|
const void* new_quick_code = quick_code;
|
|
if (UNLIKELY(instrumentation_stubs_installed_) && entry_exit_stubs_installed_) {
|
|
new_quick_code = GetQuickInstrumentationEntryPoint();
|
|
}
|
|
UpdateEntrypoints(method, new_quick_code);
|
|
}
|
|
|
|
void Instrumentation::UpdateMethodsCode(ArtMethod* method, const void* quick_code) {
|
|
DCHECK(method->GetDeclaringClass()->IsResolved());
|
|
UpdateMethodsCodeImpl(method, quick_code);
|
|
}
|
|
|
|
void Instrumentation::UpdateMethodsCodeToInterpreterEntryPoint(ArtMethod* method) {
|
|
UpdateMethodsCodeImpl(method, GetQuickToInterpreterBridge());
|
|
}
|
|
|
|
void Instrumentation::UpdateMethodsCodeForJavaDebuggable(ArtMethod* method,
|
|
const void* quick_code) {
|
|
// When the runtime is set to Java debuggable, we may update the entry points of
|
|
// all methods of a class to the interpreter bridge. A method's declaring class
|
|
// might not be in resolved state yet in that case, so we bypass the DCHECK in
|
|
// UpdateMethodsCode.
|
|
UpdateMethodsCodeImpl(method, quick_code);
|
|
}
|
|
|
|
bool Instrumentation::AddDeoptimizedMethod(ArtMethod* method) {
|
|
if (IsDeoptimizedMethod(method)) {
|
|
// Already in the map. Return.
|
|
return false;
|
|
}
|
|
// Not found. Add it.
|
|
deoptimized_methods_.insert(method);
|
|
return true;
|
|
}
|
|
|
|
bool Instrumentation::IsDeoptimizedMethod(ArtMethod* method) {
|
|
return deoptimized_methods_.find(method) != deoptimized_methods_.end();
|
|
}
|
|
|
|
ArtMethod* Instrumentation::BeginDeoptimizedMethod() {
|
|
if (deoptimized_methods_.empty()) {
|
|
// Empty.
|
|
return nullptr;
|
|
}
|
|
return *deoptimized_methods_.begin();
|
|
}
|
|
|
|
bool Instrumentation::RemoveDeoptimizedMethod(ArtMethod* method) {
|
|
auto it = deoptimized_methods_.find(method);
|
|
if (it == deoptimized_methods_.end()) {
|
|
return false;
|
|
}
|
|
deoptimized_methods_.erase(it);
|
|
return true;
|
|
}
|
|
|
|
bool Instrumentation::IsDeoptimizedMethodsEmpty() const {
|
|
return deoptimized_methods_.empty();
|
|
}
|
|
|
|
void Instrumentation::Deoptimize(ArtMethod* method) {
|
|
CHECK(!method->IsNative());
|
|
CHECK(!method->IsProxyMethod());
|
|
CHECK(method->IsInvokable());
|
|
|
|
Thread* self = Thread::Current();
|
|
{
|
|
WriterMutexLock mu(self, *GetDeoptimizedMethodsLock());
|
|
bool has_not_been_deoptimized = AddDeoptimizedMethod(method);
|
|
CHECK(has_not_been_deoptimized) << "Method " << ArtMethod::PrettyMethod(method)
|
|
<< " is already deoptimized";
|
|
}
|
|
if (!interpreter_stubs_installed_) {
|
|
UpdateEntrypoints(method, GetQuickInstrumentationEntryPoint());
|
|
|
|
// Install instrumentation exit stub and instrumentation frames. We may already have installed
|
|
// these previously so it will only cover the newly created frames.
|
|
instrumentation_stubs_installed_ = true;
|
|
MutexLock mu(self, *Locks::thread_list_lock_);
|
|
Runtime::Current()->GetThreadList()->ForEach(InstrumentationInstallStack, this);
|
|
}
|
|
}
|
|
|
|
void Instrumentation::Undeoptimize(ArtMethod* method) {
|
|
CHECK(!method->IsNative());
|
|
CHECK(!method->IsProxyMethod());
|
|
CHECK(method->IsInvokable());
|
|
|
|
Thread* self = Thread::Current();
|
|
bool empty;
|
|
{
|
|
WriterMutexLock mu(self, *GetDeoptimizedMethodsLock());
|
|
bool found_and_erased = RemoveDeoptimizedMethod(method);
|
|
CHECK(found_and_erased) << "Method " << ArtMethod::PrettyMethod(method)
|
|
<< " is not deoptimized";
|
|
empty = IsDeoptimizedMethodsEmpty();
|
|
}
|
|
|
|
// Restore code and possibly stack only if we did not deoptimize everything.
|
|
if (!interpreter_stubs_installed_) {
|
|
// Restore its code or resolution trampoline.
|
|
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
|
|
if (method->IsStatic() && !method->IsConstructor() &&
|
|
!method->GetDeclaringClass()->IsInitialized()) {
|
|
UpdateEntrypoints(method, GetQuickResolutionStub());
|
|
} else {
|
|
const void* quick_code = NeedDebugVersionFor(method)
|
|
? GetQuickToInterpreterBridge()
|
|
: class_linker->GetQuickOatCodeFor(method);
|
|
UpdateEntrypoints(method, quick_code);
|
|
}
|
|
|
|
// If there is no deoptimized method left, we can restore the stack of each thread.
|
|
if (empty && !entry_exit_stubs_installed_) {
|
|
MutexLock mu(self, *Locks::thread_list_lock_);
|
|
Runtime::Current()->GetThreadList()->ForEach(InstrumentationRestoreStack, this);
|
|
instrumentation_stubs_installed_ = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool Instrumentation::IsDeoptimized(ArtMethod* method) {
|
|
DCHECK(method != nullptr);
|
|
ReaderMutexLock mu(Thread::Current(), *GetDeoptimizedMethodsLock());
|
|
return IsDeoptimizedMethod(method);
|
|
}
|
|
|
|
void Instrumentation::EnableDeoptimization() {
|
|
ReaderMutexLock mu(Thread::Current(), *GetDeoptimizedMethodsLock());
|
|
CHECK(IsDeoptimizedMethodsEmpty());
|
|
CHECK_EQ(deoptimization_enabled_, false);
|
|
deoptimization_enabled_ = true;
|
|
}
|
|
|
|
void Instrumentation::DisableDeoptimization(const char* key) {
|
|
CHECK_EQ(deoptimization_enabled_, true);
|
|
// If we deoptimized everything, undo it.
|
|
InstrumentationLevel level = GetCurrentInstrumentationLevel();
|
|
if (level == InstrumentationLevel::kInstrumentWithInterpreter) {
|
|
UndeoptimizeEverything(key);
|
|
}
|
|
// Undeoptimized selected methods.
|
|
while (true) {
|
|
ArtMethod* method;
|
|
{
|
|
ReaderMutexLock mu(Thread::Current(), *GetDeoptimizedMethodsLock());
|
|
if (IsDeoptimizedMethodsEmpty()) {
|
|
break;
|
|
}
|
|
method = BeginDeoptimizedMethod();
|
|
CHECK(method != nullptr);
|
|
}
|
|
Undeoptimize(method);
|
|
}
|
|
deoptimization_enabled_ = false;
|
|
}
|
|
|
|
// Indicates if instrumentation should notify method enter/exit events to the listeners.
|
|
bool Instrumentation::ShouldNotifyMethodEnterExitEvents() const {
|
|
if (!HasMethodEntryListeners() && !HasMethodExitListeners()) {
|
|
return false;
|
|
}
|
|
return !deoptimization_enabled_ && !interpreter_stubs_installed_;
|
|
}
|
|
|
|
void Instrumentation::DeoptimizeEverything(const char* key) {
|
|
CHECK(deoptimization_enabled_);
|
|
ConfigureStubs(key, InstrumentationLevel::kInstrumentWithInterpreter);
|
|
}
|
|
|
|
void Instrumentation::UndeoptimizeEverything(const char* key) {
|
|
CHECK(interpreter_stubs_installed_);
|
|
CHECK(deoptimization_enabled_);
|
|
ConfigureStubs(key, InstrumentationLevel::kInstrumentNothing);
|
|
}
|
|
|
|
void Instrumentation::EnableMethodTracing(const char* key, bool needs_interpreter) {
|
|
InstrumentationLevel level;
|
|
if (needs_interpreter) {
|
|
level = InstrumentationLevel::kInstrumentWithInterpreter;
|
|
} else {
|
|
level = InstrumentationLevel::kInstrumentWithInstrumentationStubs;
|
|
}
|
|
ConfigureStubs(key, level);
|
|
}
|
|
|
|
void Instrumentation::DisableMethodTracing(const char* key) {
|
|
ConfigureStubs(key, InstrumentationLevel::kInstrumentNothing);
|
|
}
|
|
|
|
const void* Instrumentation::GetCodeForInvoke(ArtMethod* method) const {
|
|
// This is called by instrumentation entry only and that should never be getting proxy methods.
|
|
DCHECK(!method->IsProxyMethod()) << method->PrettyMethod();
|
|
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
|
|
if (LIKELY(!instrumentation_stubs_installed_ && !interpreter_stubs_installed_)) {
|
|
// In general we just return whatever the method thinks its entrypoint is here. The only
|
|
// exception is if it still has the instrumentation entrypoint. That means we are racing another
|
|
// thread getting rid of instrumentation which is unexpected but possible. In that case we want
|
|
// to wait and try to get it from the oat file or jit.
|
|
const void* code = method->GetEntryPointFromQuickCompiledCodePtrSize(kRuntimePointerSize);
|
|
DCHECK(code != nullptr);
|
|
if (code != GetQuickInstrumentationEntryPoint()) {
|
|
return code;
|
|
} else if (method->IsNative()) {
|
|
return class_linker->GetQuickOatCodeFor(method);
|
|
}
|
|
// We don't know what it is. Fallthough to try to find the code from the JIT or Oat file.
|
|
} else if (method->IsNative()) {
|
|
// TODO We could have JIT compiled native entrypoints. It might be worth it to find these.
|
|
return class_linker->GetQuickOatCodeFor(method);
|
|
} else if (UNLIKELY(interpreter_stubs_installed_)) {
|
|
return GetQuickToInterpreterBridge();
|
|
}
|
|
// Since the method cannot be native due to ifs above we can always fall back to interpreter
|
|
// bridge.
|
|
const void* result = GetQuickToInterpreterBridge();
|
|
if (!NeedDebugVersionFor(method)) {
|
|
// If we don't need a debug version we should see what the oat file/class linker has to say.
|
|
result = class_linker->GetQuickOatCodeFor(method);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
const void* Instrumentation::GetQuickCodeFor(ArtMethod* method, PointerSize pointer_size) const {
|
|
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
|
|
if (LIKELY(!instrumentation_stubs_installed_)) {
|
|
const void* code = method->GetEntryPointFromQuickCompiledCodePtrSize(pointer_size);
|
|
DCHECK(code != nullptr);
|
|
if (LIKELY(!class_linker->IsQuickResolutionStub(code) &&
|
|
!class_linker->IsQuickToInterpreterBridge(code)) &&
|
|
!class_linker->IsQuickResolutionStub(code) &&
|
|
!class_linker->IsQuickToInterpreterBridge(code)) {
|
|
return code;
|
|
}
|
|
}
|
|
return class_linker->GetQuickOatCodeFor(method);
|
|
}
|
|
|
|
void Instrumentation::MethodEnterEventImpl(Thread* thread,
|
|
ObjPtr<mirror::Object> this_object,
|
|
ArtMethod* method,
|
|
uint32_t dex_pc) const {
|
|
DCHECK(!method->IsRuntimeMethod());
|
|
if (HasMethodEntryListeners()) {
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<1> hs(self);
|
|
Handle<mirror::Object> thiz(hs.NewHandle(this_object));
|
|
for (InstrumentationListener* listener : method_entry_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->MethodEntered(thread, thiz, method, dex_pc);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template <>
|
|
void Instrumentation::MethodExitEventImpl(Thread* thread,
|
|
ObjPtr<mirror::Object> this_object,
|
|
ArtMethod* method,
|
|
uint32_t dex_pc,
|
|
OptionalFrame frame,
|
|
MutableHandle<mirror::Object>& return_value) const {
|
|
if (HasMethodExitListeners()) {
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<1> hs(self);
|
|
Handle<mirror::Object> thiz(hs.NewHandle(this_object));
|
|
for (InstrumentationListener* listener : method_exit_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->MethodExited(thread, thiz, method, dex_pc, frame, return_value);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template<> void Instrumentation::MethodExitEventImpl(Thread* thread,
|
|
ObjPtr<mirror::Object> this_object,
|
|
ArtMethod* method,
|
|
uint32_t dex_pc,
|
|
OptionalFrame frame,
|
|
JValue& return_value) const {
|
|
if (HasMethodExitListeners()) {
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<2> hs(self);
|
|
Handle<mirror::Object> thiz(hs.NewHandle(this_object));
|
|
if (method->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetReturnTypePrimitive() !=
|
|
Primitive::kPrimNot) {
|
|
for (InstrumentationListener* listener : method_exit_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->MethodExited(thread, thiz, method, dex_pc, frame, return_value);
|
|
}
|
|
}
|
|
} else {
|
|
MutableHandle<mirror::Object> ret(hs.NewHandle(return_value.GetL()));
|
|
MethodExitEventImpl(thread, thiz.Get(), method, dex_pc, frame, ret);
|
|
return_value.SetL(ret.Get());
|
|
}
|
|
}
|
|
}
|
|
|
|
void Instrumentation::MethodUnwindEvent(Thread* thread,
|
|
ObjPtr<mirror::Object> this_object,
|
|
ArtMethod* method,
|
|
uint32_t dex_pc) const {
|
|
if (HasMethodUnwindListeners()) {
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<1> hs(self);
|
|
Handle<mirror::Object> thiz(hs.NewHandle(this_object));
|
|
for (InstrumentationListener* listener : method_unwind_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->MethodUnwind(thread, thiz, method, dex_pc);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void Instrumentation::DexPcMovedEventImpl(Thread* thread,
|
|
ObjPtr<mirror::Object> this_object,
|
|
ArtMethod* method,
|
|
uint32_t dex_pc) const {
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<1> hs(self);
|
|
Handle<mirror::Object> thiz(hs.NewHandle(this_object));
|
|
for (InstrumentationListener* listener : dex_pc_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->DexPcMoved(thread, thiz, method, dex_pc);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Instrumentation::BranchImpl(Thread* thread,
|
|
ArtMethod* method,
|
|
uint32_t dex_pc,
|
|
int32_t offset) const {
|
|
for (InstrumentationListener* listener : branch_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->Branch(thread, method, dex_pc, offset);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Instrumentation::WatchedFramePopImpl(Thread* thread, const ShadowFrame& frame) const {
|
|
for (InstrumentationListener* listener : watched_frame_pop_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->WatchedFramePop(thread, frame);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Instrumentation::FieldReadEventImpl(Thread* thread,
|
|
ObjPtr<mirror::Object> this_object,
|
|
ArtMethod* method,
|
|
uint32_t dex_pc,
|
|
ArtField* field) const {
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<1> hs(self);
|
|
Handle<mirror::Object> thiz(hs.NewHandle(this_object));
|
|
for (InstrumentationListener* listener : field_read_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->FieldRead(thread, thiz, method, dex_pc, field);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Instrumentation::FieldWriteEventImpl(Thread* thread,
|
|
ObjPtr<mirror::Object> this_object,
|
|
ArtMethod* method,
|
|
uint32_t dex_pc,
|
|
ArtField* field,
|
|
const JValue& field_value) const {
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<2> hs(self);
|
|
Handle<mirror::Object> thiz(hs.NewHandle(this_object));
|
|
if (field->IsPrimitiveType()) {
|
|
for (InstrumentationListener* listener : field_write_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->FieldWritten(thread, thiz, method, dex_pc, field, field_value);
|
|
}
|
|
}
|
|
} else {
|
|
Handle<mirror::Object> val(hs.NewHandle(field_value.GetL()));
|
|
for (InstrumentationListener* listener : field_write_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->FieldWritten(thread, thiz, method, dex_pc, field, val);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void Instrumentation::ExceptionThrownEvent(Thread* thread,
|
|
ObjPtr<mirror::Throwable> exception_object) const {
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<1> hs(self);
|
|
Handle<mirror::Throwable> h_exception(hs.NewHandle(exception_object));
|
|
if (HasExceptionThrownListeners()) {
|
|
DCHECK_EQ(thread->GetException(), h_exception.Get());
|
|
thread->ClearException();
|
|
for (InstrumentationListener* listener : exception_thrown_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->ExceptionThrown(thread, h_exception);
|
|
}
|
|
}
|
|
// See b/65049545 for discussion about this behavior.
|
|
thread->AssertNoPendingException();
|
|
thread->SetException(h_exception.Get());
|
|
}
|
|
}
|
|
|
|
void Instrumentation::ExceptionHandledEvent(Thread* thread,
|
|
ObjPtr<mirror::Throwable> exception_object) const {
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<1> hs(self);
|
|
Handle<mirror::Throwable> h_exception(hs.NewHandle(exception_object));
|
|
if (HasExceptionHandledListeners()) {
|
|
// We should have cleared the exception so that callers can detect a new one.
|
|
DCHECK(thread->GetException() == nullptr);
|
|
for (InstrumentationListener* listener : exception_handled_listeners_) {
|
|
if (listener != nullptr) {
|
|
listener->ExceptionHandled(thread, h_exception);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void Instrumentation::PushInstrumentationStackFrame(Thread* self,
|
|
ObjPtr<mirror::Object> this_object,
|
|
ArtMethod* method,
|
|
uintptr_t stack_ptr,
|
|
uintptr_t lr,
|
|
bool interpreter_entry) {
|
|
DCHECK(!self->IsExceptionPending());
|
|
std::map<uintptr_t, instrumentation::InstrumentationStackFrame>* stack =
|
|
self->GetInstrumentationStack();
|
|
if (kVerboseInstrumentation) {
|
|
LOG(INFO) << "Entering " << ArtMethod::PrettyMethod(method) << " from PC "
|
|
<< reinterpret_cast<void*>(lr);
|
|
}
|
|
|
|
// We send the enter event before pushing the instrumentation frame to make cleanup easier. If the
|
|
// event causes an exception we can simply send the unwind event and return.
|
|
StackHandleScope<1> hs(self);
|
|
Handle<mirror::Object> h_this(hs.NewHandle(this_object));
|
|
if (!interpreter_entry) {
|
|
MethodEnterEvent(self, h_this.Get(), method, 0);
|
|
if (self->IsExceptionPending()) {
|
|
MethodUnwindEvent(self, h_this.Get(), method, 0);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// We have a callee-save frame meaning this value is guaranteed to never be 0.
|
|
DCHECK(!self->IsExceptionPending());
|
|
size_t frame_id = StackVisitor::ComputeNumFrames(self, kInstrumentationStackWalk);
|
|
|
|
instrumentation::InstrumentationStackFrame instrumentation_frame(
|
|
h_this.Get(), method, lr, frame_id, interpreter_entry, current_force_deopt_id_);
|
|
stack->insert({stack_ptr, instrumentation_frame});
|
|
}
|
|
|
|
DeoptimizationMethodType Instrumentation::GetDeoptimizationMethodType(ArtMethod* method) {
|
|
if (method->IsRuntimeMethod()) {
|
|
// Certain methods have strict requirement on whether the dex instruction
|
|
// should be re-executed upon deoptimization.
|
|
if (method == Runtime::Current()->GetCalleeSaveMethod(
|
|
CalleeSaveType::kSaveEverythingForClinit)) {
|
|
return DeoptimizationMethodType::kKeepDexPc;
|
|
}
|
|
if (method == Runtime::Current()->GetCalleeSaveMethod(
|
|
CalleeSaveType::kSaveEverythingForSuspendCheck)) {
|
|
return DeoptimizationMethodType::kKeepDexPc;
|
|
}
|
|
}
|
|
return DeoptimizationMethodType::kDefault;
|
|
}
|
|
|
|
// Try to get the shorty of a runtime method if it's an invocation stub.
|
|
static char GetRuntimeMethodShorty(Thread* thread) REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
char shorty = 'V';
|
|
StackVisitor::WalkStack(
|
|
[&shorty](const art::StackVisitor* stack_visitor) REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
ArtMethod* m = stack_visitor->GetMethod();
|
|
if (m == nullptr || m->IsRuntimeMethod()) {
|
|
return true;
|
|
}
|
|
// The first Java method.
|
|
if (m->IsNative()) {
|
|
// Use JNI method's shorty for the jni stub.
|
|
shorty = m->GetShorty()[0];
|
|
} else if (m->IsProxyMethod()) {
|
|
// Proxy method just invokes its proxied method via
|
|
// art_quick_proxy_invoke_handler.
|
|
shorty = m->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetShorty()[0];
|
|
} else {
|
|
const Instruction& instr = m->DexInstructions().InstructionAt(stack_visitor->GetDexPc());
|
|
if (instr.IsInvoke()) {
|
|
uint16_t method_index = static_cast<uint16_t>(instr.VRegB());
|
|
const DexFile* dex_file = m->GetDexFile();
|
|
if (interpreter::IsStringInit(dex_file, method_index)) {
|
|
// Invoking string init constructor is turned into invoking
|
|
// StringFactory.newStringFromChars() which returns a string.
|
|
shorty = 'L';
|
|
} else {
|
|
shorty = dex_file->GetMethodShorty(method_index)[0];
|
|
}
|
|
|
|
} else {
|
|
// It could be that a non-invoke opcode invokes a stub, which in turn
|
|
// invokes Java code. In such cases, we should never expect a return
|
|
// value from the stub.
|
|
}
|
|
}
|
|
// Stop stack walking since we've seen a Java frame.
|
|
return false;
|
|
},
|
|
thread,
|
|
/* context= */ nullptr,
|
|
art::StackVisitor::StackWalkKind::kIncludeInlinedFrames);
|
|
return shorty;
|
|
}
|
|
|
|
TwoWordReturn Instrumentation::PopInstrumentationStackFrame(Thread* self,
|
|
uintptr_t* return_pc_addr,
|
|
uint64_t* gpr_result,
|
|
uint64_t* fpr_result) {
|
|
DCHECK(gpr_result != nullptr);
|
|
DCHECK(fpr_result != nullptr);
|
|
// Do the pop.
|
|
std::map<uintptr_t, instrumentation::InstrumentationStackFrame>* stack =
|
|
self->GetInstrumentationStack();
|
|
CHECK_GT(stack->size(), 0U);
|
|
auto it = stack->find(reinterpret_cast<uintptr_t>(return_pc_addr));
|
|
CHECK(it != stack->end());
|
|
InstrumentationStackFrame instrumentation_frame = it->second;
|
|
stack->erase(it);
|
|
|
|
// Set return PC and check the consistency of the stack.
|
|
// We don't cache the return pc value in a local as it may change after
|
|
// sending a method exit event.
|
|
*return_pc_addr = instrumentation_frame.return_pc_;
|
|
self->VerifyStack();
|
|
|
|
ArtMethod* method = instrumentation_frame.method_;
|
|
uint32_t length;
|
|
const PointerSize pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize();
|
|
char return_shorty;
|
|
|
|
// Runtime method does not call into MethodExitEvent() so there should not be
|
|
// suspension point below.
|
|
ScopedAssertNoThreadSuspension ants(__FUNCTION__, method->IsRuntimeMethod());
|
|
if (method->IsRuntimeMethod()) {
|
|
if (method != Runtime::Current()->GetCalleeSaveMethod(
|
|
CalleeSaveType::kSaveEverythingForClinit)) {
|
|
// If the caller is at an invocation point and the runtime method is not
|
|
// for clinit, we need to pass return results to the caller.
|
|
// We need the correct shorty to decide whether we need to pass the return
|
|
// result for deoptimization below.
|
|
return_shorty = GetRuntimeMethodShorty(self);
|
|
} else {
|
|
// Some runtime methods such as allocations, unresolved field getters, etc.
|
|
// have return value. We don't need to set return_value since MethodExitEvent()
|
|
// below isn't called for runtime methods. Deoptimization doesn't need the
|
|
// value either since the dex instruction will be re-executed by the
|
|
// interpreter, except these two cases:
|
|
// (1) For an invoke, which is handled above to get the correct shorty.
|
|
// (2) For MONITOR_ENTER/EXIT, which cannot be re-executed since it's not
|
|
// idempotent. However there is no return value for it anyway.
|
|
return_shorty = 'V';
|
|
}
|
|
} else {
|
|
return_shorty = method->GetInterfaceMethodIfProxy(pointer_size)->GetShorty(&length)[0];
|
|
}
|
|
|
|
bool is_ref = return_shorty == '[' || return_shorty == 'L';
|
|
StackHandleScope<1> hs(self);
|
|
MutableHandle<mirror::Object> res(hs.NewHandle<mirror::Object>(nullptr));
|
|
JValue return_value;
|
|
if (return_shorty == 'V') {
|
|
return_value.SetJ(0);
|
|
} else if (return_shorty == 'F' || return_shorty == 'D') {
|
|
return_value.SetJ(*fpr_result);
|
|
} else {
|
|
return_value.SetJ(*gpr_result);
|
|
}
|
|
if (is_ref) {
|
|
// Take a handle to the return value so we won't lose it if we suspend.
|
|
res.Assign(return_value.GetL());
|
|
}
|
|
// TODO: improve the dex pc information here, requires knowledge of current PC as opposed to
|
|
// return_pc.
|
|
uint32_t dex_pc = dex::kDexNoIndex;
|
|
if (!method->IsRuntimeMethod() && !instrumentation_frame.interpreter_entry_) {
|
|
ObjPtr<mirror::Object> this_object = instrumentation_frame.this_object_;
|
|
// Note that sending the event may change the contents of *return_pc_addr.
|
|
MethodExitEvent(
|
|
self, this_object, instrumentation_frame.method_, dex_pc, OptionalFrame{}, return_value);
|
|
}
|
|
|
|
// Deoptimize if the caller needs to continue execution in the interpreter. Do nothing if we get
|
|
// back to an upcall.
|
|
NthCallerVisitor visitor(self, 1, true);
|
|
visitor.WalkStack(true);
|
|
bool deoptimize = (visitor.caller != nullptr) &&
|
|
(interpreter_stubs_installed_ || IsDeoptimized(visitor.caller) ||
|
|
self->IsForceInterpreter() ||
|
|
// NB Since structurally obsolete compiled methods might have the offsets of
|
|
// methods/fields compiled in we need to go back to interpreter whenever we hit
|
|
// them.
|
|
visitor.caller->GetDeclaringClass()->IsObsoleteObject() ||
|
|
// Check if we forced all threads to deoptimize in the time between this frame
|
|
// being created and now.
|
|
instrumentation_frame.force_deopt_id_ != current_force_deopt_id_ ||
|
|
Dbg::IsForcedInterpreterNeededForUpcall(self, visitor.caller));
|
|
if (is_ref) {
|
|
// Restore the return value if it's a reference since it might have moved.
|
|
*reinterpret_cast<mirror::Object**>(gpr_result) = res.Get();
|
|
}
|
|
if (deoptimize && Runtime::Current()->IsAsyncDeoptimizeable(*return_pc_addr)) {
|
|
if (kVerboseInstrumentation) {
|
|
LOG(INFO) << "Deoptimizing "
|
|
<< visitor.caller->PrettyMethod()
|
|
<< " by returning from "
|
|
<< method->PrettyMethod()
|
|
<< " with result "
|
|
<< std::hex << return_value.GetJ() << std::dec
|
|
<< " in "
|
|
<< *self;
|
|
}
|
|
DeoptimizationMethodType deopt_method_type = GetDeoptimizationMethodType(method);
|
|
self->PushDeoptimizationContext(return_value,
|
|
return_shorty == 'L' || return_shorty == '[',
|
|
/* exception= */ nullptr ,
|
|
/* from_code= */ false,
|
|
deopt_method_type);
|
|
return GetTwoWordSuccessValue(*return_pc_addr,
|
|
reinterpret_cast<uintptr_t>(GetQuickDeoptimizationEntryPoint()));
|
|
} else {
|
|
if (deoptimize && !Runtime::Current()->IsAsyncDeoptimizeable(*return_pc_addr)) {
|
|
VLOG(deopt) << "Got a deoptimization request on un-deoptimizable " << method->PrettyMethod()
|
|
<< " at PC " << reinterpret_cast<void*>(*return_pc_addr);
|
|
}
|
|
if (kVerboseInstrumentation) {
|
|
LOG(INFO) << "Returning from " << method->PrettyMethod()
|
|
<< " to PC " << reinterpret_cast<void*>(*return_pc_addr);
|
|
}
|
|
return GetTwoWordSuccessValue(0, *return_pc_addr);
|
|
}
|
|
}
|
|
|
|
uintptr_t Instrumentation::PopFramesForDeoptimization(Thread* self, uintptr_t pop_until) const {
|
|
std::map<uintptr_t, instrumentation::InstrumentationStackFrame>* stack =
|
|
self->GetInstrumentationStack();
|
|
// Pop all instrumentation frames below `pop_until`.
|
|
uintptr_t return_pc = 0u;
|
|
for (auto i = stack->begin(); i != stack->end() && i->first <= pop_until;) {
|
|
auto e = i;
|
|
++i;
|
|
if (kVerboseInstrumentation) {
|
|
LOG(INFO) << "Popping for deoptimization " << e->second.method_->PrettyMethod();
|
|
}
|
|
return_pc = e->second.return_pc_;
|
|
stack->erase(e);
|
|
}
|
|
return return_pc;
|
|
}
|
|
|
|
std::string InstrumentationStackFrame::Dump() const {
|
|
std::ostringstream os;
|
|
os << "Frame " << frame_id_ << " " << ArtMethod::PrettyMethod(method_) << ":"
|
|
<< reinterpret_cast<void*>(return_pc_) << " this=" << reinterpret_cast<void*>(this_object_)
|
|
<< " force_deopt_id=" << force_deopt_id_;
|
|
return os.str();
|
|
}
|
|
|
|
} // namespace instrumentation
|
|
} // namespace art
|