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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "base/logging.h" // For VLOG_IS_ON.
#include "base/mutex.h"
#include "callee_save_frame.h"
#include "interpreter/interpreter.h"
#include "obj_ptr-inl.h" // TODO: Find the other include that isn't complete, and clean this up.
#include "quick_exception_handler.h"
#include "runtime.h"
#include "thread.h"
namespace art {
NO_RETURN static void artDeoptimizeImpl(Thread* self,
DeoptimizationKind kind,
bool single_frame,
bool skip_method_exit_callbacks)
REQUIRES_SHARED(Locks::mutator_lock_) {
Runtime::Current()->IncrementDeoptimizationCount(kind);
if (VLOG_IS_ON(deopt)) {
if (single_frame) {
// Deopt logging will be in DeoptimizeSingleFrame. It is there to take advantage of the
// specialized visitor that will show whether a method is Quick or Shadow.
} else {
LOG(INFO) << "Deopting:";
self->Dump(LOG_STREAM(INFO));
}
}
self->AssertHasDeoptimizationContext();
QuickExceptionHandler exception_handler(self, true);
if (single_frame) {
exception_handler.DeoptimizeSingleFrame(kind);
} else {
exception_handler.DeoptimizeStack(skip_method_exit_callbacks);
}
if (exception_handler.IsFullFragmentDone()) {
exception_handler.DoLongJump(true);
} else {
exception_handler.DeoptimizePartialFragmentFixup();
// We cannot smash the caller-saves, as we need the ArtMethod in a parameter register that would
// be caller-saved. This has the downside that we cannot track incorrect register usage down the
// line.
exception_handler.DoLongJump(false);
}
}
extern "C" NO_RETURN void artDeoptimize(Thread* self, bool skip_method_exit_callbacks)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
artDeoptimizeImpl(self, DeoptimizationKind::kFullFrame, false, skip_method_exit_callbacks);
}
// This is called directly from compiled code by an HDeoptimize.
extern "C" NO_RETURN void artDeoptimizeFromCompiledCode(DeoptimizationKind kind, Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
// Before deoptimizing to interpreter, we must push the deoptimization context.
JValue return_value;
return_value.SetJ(0); // we never deoptimize from compiled code with an invoke result.
self->PushDeoptimizationContext(return_value,
/* is_reference= */ false,
self->GetException(),
/* from_code= */ true,
DeoptimizationMethodType::kDefault);
// Deopting from compiled code, so method exit haven't run yet. Don't skip method exit callbacks
// if required.
artDeoptimizeImpl(self, kind, true, /* skip_method_exit_callbacks= */ false);
}
} // namespace art
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