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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "art_method-inl.h"
     18 #include "base/logging.h"
     19 #include "callee_save_frame.h"
     20 #include "dex_file-inl.h"
     21 #include "interpreter/interpreter.h"
     22 #include "mirror/class-inl.h"
     23 #include "mirror/object_array-inl.h"
     24 #include "mirror/object-inl.h"
     25 #include "quick_exception_handler.h"
     26 #include "stack.h"
     27 #include "thread.h"
     28 #include "verifier/method_verifier.h"
     29 
     30 namespace art {
     31 
     32 extern "C" NO_RETURN void artDeoptimize(Thread* self) SHARED_REQUIRES(Locks::mutator_lock_) {
     33   ScopedQuickEntrypointChecks sqec(self);
     34 
     35   if (VLOG_IS_ON(deopt)) {
     36     LOG(INFO) << "Deopting:";
     37     self->Dump(LOG(INFO));
     38   }
     39 
     40   self->AssertHasDeoptimizationContext();
     41   self->SetException(Thread::GetDeoptimizationException());
     42   self->QuickDeliverException();
     43 }
     44 
     45 extern "C" NO_RETURN void artDeoptimizeFromCompiledCode(Thread* self)
     46     SHARED_REQUIRES(Locks::mutator_lock_) {
     47   ScopedQuickEntrypointChecks sqec(self);
     48 
     49   // Deopt logging will be in DeoptimizeSingleFrame. It is there to take advantage of the
     50   // specialized visitor that will show whether a method is Quick or Shadow.
     51 
     52   // Before deoptimizing to interpreter, we must push the deoptimization context.
     53   JValue return_value;
     54   return_value.SetJ(0);  // we never deoptimize from compiled code with an invoke result.
     55   self->PushDeoptimizationContext(return_value, false, /* from_code */ true, self->GetException());
     56 
     57   QuickExceptionHandler exception_handler(self, true);
     58   exception_handler.DeoptimizeSingleFrame();
     59   exception_handler.UpdateInstrumentationStack();
     60   exception_handler.DeoptimizeSingleFrameArchDependentFixup();
     61   // We cannot smash the caller-saves, as we need the ArtMethod in a parameter register that would
     62   // be caller-saved. This has the downside that we cannot track incorrect register usage down the
     63   // line.
     64   exception_handler.DoLongJump(false);
     65 }
     66 
     67 }  // namespace art
     68