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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 "callee_save_frame.h"
#include "entrypoints/runtime_asm_entrypoints.h"
#include "instrumentation.h"
#include "mirror/art_method-inl.h"
#include "mirror/object-inl.h"
#include "runtime.h"
#include "thread-inl.h"
namespace art {
extern "C" const void* artInstrumentationMethodEntryFromCode(mirror::ArtMethod* method,
mirror::Object* this_object,
Thread* self,
uintptr_t lr)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
const void* result;
if (instrumentation->IsDeoptimized(method)) {
result = GetQuickToInterpreterBridge();
} else {
result = instrumentation->GetQuickCodeFor(method, sizeof(void*));
DCHECK(!Runtime::Current()->GetClassLinker()->IsQuickToInterpreterBridge(result));
}
bool interpreter_entry = (result == GetQuickToInterpreterBridge());
instrumentation->PushInstrumentationStackFrame(self, method->IsStatic() ? nullptr : this_object,
method, lr, interpreter_entry);
CHECK(result != nullptr) << PrettyMethod(method);
return result;
}
extern "C" TwoWordReturn artInstrumentationMethodExitFromCode(Thread* self,
StackReference<mirror::ArtMethod>* sp,
uint64_t gpr_result,
uint64_t fpr_result)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
// Compute address of return PC and sanity check that it currently holds 0.
size_t return_pc_offset = GetCalleeSaveReturnPcOffset(kRuntimeISA, Runtime::kRefsOnly);
uintptr_t* return_pc = reinterpret_cast<uintptr_t*>(reinterpret_cast<uint8_t*>(sp) +
return_pc_offset);
CHECK_EQ(*return_pc, 0U);
// Pop the frame filling in the return pc. The low half of the return value is 0 when
// deoptimization shouldn't be performed with the high-half having the return address. When
// deoptimization should be performed the low half is zero and the high-half the address of the
// deoptimization entry point.
instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
TwoWordReturn return_or_deoptimize_pc = instrumentation->PopInstrumentationStackFrame(
self, return_pc, gpr_result, fpr_result);
return return_or_deoptimize_pc;
}
} // namespace art
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