quick_instrumentation_entrypoints.cc revision 848871b4d8481229c32e0d048a9856e5a9a17ef9 
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 "callee_save_frame.h"
18#include "instrumentation.h"
19#include "mirror/abstract_method-inl.h"
20#include "mirror/object-inl.h"
21#include "runtime.h"
22#include "thread-inl.h"
23
24namespace art {
25
26extern "C" const void* artInstrumentationMethodEntryFromCode(mirror::AbstractMethod* method,
27                                                             mirror::Object* this_object,
28                                                             Thread* self,
29                                                             mirror::AbstractMethod** sp,
30                                                             uintptr_t lr)
31    SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
32  FinishCalleeSaveFrameSetup(self, sp, Runtime::kRefsAndArgs);
33  instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
34  const void* result = instrumentation->GetQuickCodeFor(method);
35  bool interpreter_entry = (result == GetQuickToInterpreterBridge());
36  instrumentation->PushInstrumentationStackFrame(self, method->IsStatic() ? NULL : this_object,
37                                                 method, lr, interpreter_entry);
38  CHECK(result != NULL) << PrettyMethod(method);
39  return result;
40}
41
42extern "C" uint64_t artInstrumentationMethodExitFromCode(Thread* self, mirror::AbstractMethod** sp,
43                                                         uint64_t gpr_result, uint64_t fpr_result)
44    SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
45  // TODO: use FinishCalleeSaveFrameSetup(self, sp, Runtime::kRefsOnly) not the hand inlined below.
46  //       We use the hand inline version to ensure the return_pc is assigned before verifying the
47  //       stack.
48  // Be aware the store below may well stomp on an incoming argument.
49  Locks::mutator_lock_->AssertSharedHeld(self);
50  mirror::AbstractMethod* callee_save = Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsOnly);
51  *sp = callee_save;
52  uintptr_t* return_pc = reinterpret_cast<uintptr_t*>(reinterpret_cast<byte*>(sp) +
53                                                      callee_save->GetReturnPcOffsetInBytes());
54  CHECK_EQ(*return_pc, 0U);
55  self->SetTopOfStack(sp, 0);
56  self->VerifyStack();
57  instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
58  uint64_t return_or_deoptimize_pc = instrumentation->PopInstrumentationStackFrame(self, return_pc,
59                                                                                   gpr_result,
60                                                                                   fpr_result);
61  self->VerifyStack();
62  return return_or_deoptimize_pc;
63}
64
65}  // namespace art
66