81 lines
3.1 KiB
C++
81 lines
3.1 KiB
C++
/*
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* Copyright (C) 2012 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 "base/logging.h" // For VLOG_IS_ON.
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#include "base/mutex.h"
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#include "callee_save_frame.h"
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#include "interpreter/interpreter.h"
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#include "obj_ptr-inl.h" // TODO: Find the other include that isn't complete, and clean this up.
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#include "quick_exception_handler.h"
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#include "runtime.h"
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#include "thread.h"
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namespace art {
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NO_RETURN static void artDeoptimizeImpl(Thread* self, DeoptimizationKind kind, bool single_frame)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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Runtime::Current()->IncrementDeoptimizationCount(kind);
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if (VLOG_IS_ON(deopt)) {
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if (single_frame) {
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// Deopt logging will be in DeoptimizeSingleFrame. It is there to take advantage of the
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// specialized visitor that will show whether a method is Quick or Shadow.
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} else {
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LOG(INFO) << "Deopting:";
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self->Dump(LOG_STREAM(INFO));
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}
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}
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self->AssertHasDeoptimizationContext();
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QuickExceptionHandler exception_handler(self, true);
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if (single_frame) {
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exception_handler.DeoptimizeSingleFrame(kind);
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} else {
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exception_handler.DeoptimizeStack();
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}
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uintptr_t return_pc = exception_handler.UpdateInstrumentationStack();
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if (exception_handler.IsFullFragmentDone()) {
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exception_handler.DoLongJump(true);
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} else {
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exception_handler.DeoptimizePartialFragmentFixup(return_pc);
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// We cannot smash the caller-saves, as we need the ArtMethod in a parameter register that would
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// be caller-saved. This has the downside that we cannot track incorrect register usage down the
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// line.
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exception_handler.DoLongJump(false);
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}
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}
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extern "C" NO_RETURN void artDeoptimize(Thread* self) REQUIRES_SHARED(Locks::mutator_lock_) {
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ScopedQuickEntrypointChecks sqec(self);
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artDeoptimizeImpl(self, DeoptimizationKind::kFullFrame, false);
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}
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// This is called directly from compiled code by an HDeoptimize.
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extern "C" NO_RETURN void artDeoptimizeFromCompiledCode(DeoptimizationKind kind, Thread* self)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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ScopedQuickEntrypointChecks sqec(self);
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// Before deoptimizing to interpreter, we must push the deoptimization context.
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JValue return_value;
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return_value.SetJ(0); // we never deoptimize from compiled code with an invoke result.
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self->PushDeoptimizationContext(return_value,
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/* is_reference= */ false,
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self->GetException(),
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/* from_code= */ true,
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DeoptimizationMethodType::kDefault);
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artDeoptimizeImpl(self, kind, true);
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}
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} // namespace art
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