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/*
* Copyright (C) 2013 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 "verification_results.h"
#include "base/stl_util.h"
#include "base/mutex.h"
#include "base/mutex-inl.h"
#include "thread.h"
#include "thread-inl.h"
#include "verified_method.h"
#include "verifier/method_verifier.h"
#include "verifier/method_verifier-inl.h"
namespace art {
VerificationResults::VerificationResults()
: verified_methods_lock_("compiler verified methods lock"),
verified_methods_(),
rejected_classes_lock_("compiler rejected classes lock"),
rejected_classes_() {
}
VerificationResults::~VerificationResults() {
Thread* self = Thread::Current();
{
WriterMutexLock mu(self, verified_methods_lock_);
STLDeleteValues(&verified_methods_);
}
}
bool VerificationResults::ProcessVerifiedMethod(verifier::MethodVerifier* method_verifier) {
MethodReference ref = method_verifier->GetMethodReference();
bool compile = IsCandidateForCompilation(ref, method_verifier->GetAccessFlags());
// TODO: Check also for virtual/interface invokes when DEX-to-DEX supports devirtualization.
if (!compile && !method_verifier->HasCheckCasts()) {
return true;
}
const VerifiedMethod* verified_method = VerifiedMethod::Create(method_verifier, compile);
if (verified_method == nullptr) {
DCHECK(method_verifier->HasFailures());
return false;
}
WriterMutexLock mu(Thread::Current(), verified_methods_lock_);
auto it = verified_methods_.find(ref);
if (it != verified_methods_.end()) {
// TODO: Investigate why are we doing the work again for this method and try to avoid it.
LOG(WARNING) << "Method processed more than once: "
<< PrettyMethod(ref.dex_method_index, *ref.dex_file);
DCHECK_EQ(it->second->GetDevirtMap().size(), verified_method->GetDevirtMap().size());
DCHECK_EQ(it->second->GetSafeCastSet().size(), verified_method->GetSafeCastSet().size());
DCHECK_EQ(it->second->GetDexGcMap().size(), verified_method->GetDexGcMap().size());
delete it->second;
verified_methods_.erase(it);
}
verified_methods_.Put(ref, verified_method);
DCHECK(verified_methods_.find(ref) != verified_methods_.end());
return true;
}
const VerifiedMethod* VerificationResults::GetVerifiedMethod(MethodReference ref) {
ReaderMutexLock mu(Thread::Current(), verified_methods_lock_);
auto it = verified_methods_.find(ref);
return (it != verified_methods_.end()) ? it->second : nullptr;
}
const std::vector<uint8_t>* VerificationResults::GetDexGcMap(MethodReference ref) {
const VerifiedMethod* verified_method = GetVerifiedMethod(ref);
CHECK(verified_method != nullptr)
<< "Didn't find GC map for: " << PrettyMethod(ref.dex_method_index, *ref.dex_file);
return &verified_method->GetDexGcMap();
}
const MethodReference* VerificationResults::GetDevirtMap(const MethodReference& ref,
uint32_t dex_pc) {
const VerifiedMethod* verified_method = GetVerifiedMethod(ref);
return (verified_method != nullptr) ? verified_method->GetDevirtTarget(dex_pc) : nullptr;
}
bool VerificationResults::IsSafeCast(MethodReference ref, uint32_t pc) {
const VerifiedMethod* verified_method = GetVerifiedMethod(ref);
return (verified_method != nullptr) && (verified_method->IsSafeCast(pc));
}
void VerificationResults::AddRejectedClass(ClassReference ref) {
{
WriterMutexLock mu(Thread::Current(), rejected_classes_lock_);
rejected_classes_.insert(ref);
}
DCHECK(IsClassRejected(ref));
}
bool VerificationResults::IsClassRejected(ClassReference ref) {
ReaderMutexLock mu(Thread::Current(), rejected_classes_lock_);
return (rejected_classes_.find(ref) != rejected_classes_.end());
}
bool VerificationResults::IsCandidateForCompilation(MethodReference& method_ref,
const uint32_t access_flags) {
#ifdef ART_SEA_IR_MODE
bool use_sea = Runtime::Current()->IsSeaIRMode();
use_sea = use_sea && (std::string::npos != PrettyMethod(
method_ref.dex_method_index, *(method_ref.dex_file)).find("fibonacci"));
if (use_sea) return true;
#endif
// Don't compile class initializers, ever.
if (((access_flags & kAccConstructor) != 0) && ((access_flags & kAccStatic) != 0)) {
return false;
}
return (Runtime::Current()->GetCompilerFilter() != Runtime::kInterpretOnly);
}
} // namespace art
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