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 "base/logging.h" // For VLOG_IS_ON.
18 #include "base/mutex.h"
19 #include "callee_save_frame.h"
20 #include "interpreter/interpreter.h"
21 #include "obj_ptr-inl.h" // TODO: Find the other include that isn't complete, and clean this up.
22 #include "quick_exception_handler.h"
23 #include "runtime.h"
24 #include "thread.h"
25
26 namespace art HIDDEN {
27
artDeoptimizeImpl(Thread * self,DeoptimizationKind kind,bool single_frame,bool skip_method_exit_callbacks)28 NO_RETURN static void artDeoptimizeImpl(Thread* self,
29 DeoptimizationKind kind,
30 bool single_frame,
31 bool skip_method_exit_callbacks)
32 REQUIRES_SHARED(Locks::mutator_lock_) {
33 Runtime::Current()->IncrementDeoptimizationCount(kind);
34 if (VLOG_IS_ON(deopt)) {
35 if (single_frame) {
36 // Deopt logging will be in DeoptimizeSingleFrame. It is there to take advantage of the
37 // specialized visitor that will show whether a method is Quick or Shadow.
38 } else {
39 LOG(INFO) << "Deopting:";
40 self->Dump(LOG_STREAM(INFO));
41 }
42 }
43
44 self->AssertHasDeoptimizationContext();
45 QuickExceptionHandler exception_handler(self, true);
46 if (single_frame) {
47 exception_handler.DeoptimizeSingleFrame(kind);
48 } else {
49 exception_handler.DeoptimizeStack(skip_method_exit_callbacks);
50 }
51 if (exception_handler.IsFullFragmentDone()) {
52 exception_handler.DoLongJump(true);
53 } else {
54 exception_handler.DeoptimizePartialFragmentFixup();
55 // We cannot smash the caller-saves, as we need the ArtMethod in a parameter register that would
56 // be caller-saved. This has the downside that we cannot track incorrect register usage down the
57 // line.
58 exception_handler.DoLongJump(false);
59 }
60 }
61
artDeoptimize(Thread * self,bool skip_method_exit_callbacks)62 extern "C" NO_RETURN void artDeoptimize(Thread* self, bool skip_method_exit_callbacks)
63 REQUIRES_SHARED(Locks::mutator_lock_) {
64 ScopedQuickEntrypointChecks sqec(self);
65 artDeoptimizeImpl(self, DeoptimizationKind::kFullFrame, false, skip_method_exit_callbacks);
66 }
67
68 // This is called directly from compiled code by an HDeoptimize.
artDeoptimizeFromCompiledCode(DeoptimizationKind kind,Thread * self)69 extern "C" NO_RETURN void artDeoptimizeFromCompiledCode(DeoptimizationKind kind, Thread* self)
70 REQUIRES_SHARED(Locks::mutator_lock_) {
71 ScopedQuickEntrypointChecks sqec(self);
72 // Before deoptimizing to interpreter, we must push the deoptimization context.
73 JValue return_value;
74 return_value.SetJ(0); // we never deoptimize from compiled code with an invoke result.
75 self->PushDeoptimizationContext(return_value,
76 /* is_reference= */ false,
77 self->GetException(),
78 /* from_code= */ true,
79 DeoptimizationMethodType::kDefault);
80 // Deopting from compiled code, so method exit haven't run yet. Don't skip method exit callbacks
81 // if required.
82 artDeoptimizeImpl(self, kind, true, /* skip_method_exit_callbacks= */ false);
83 }
84
85 } // namespace art
86