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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/simulator-base.h"
#include "src/assembler.h"
#include "src/isolate.h"
#include "src/simulator.h"
#if defined(USE_SIMULATOR)
namespace v8 {
namespace internal {
// static
base::Mutex* SimulatorBase::redirection_mutex_ = nullptr;
// static
Redirection* SimulatorBase::redirection_ = nullptr;
// static
base::Mutex* SimulatorBase::i_cache_mutex_ = nullptr;
// static
base::CustomMatcherHashMap* SimulatorBase::i_cache_ = nullptr;
// static
void SimulatorBase::InitializeOncePerProcess() {
DCHECK_NULL(redirection_mutex_);
redirection_mutex_ = new base::Mutex();
DCHECK_NULL(i_cache_mutex_);
i_cache_mutex_ = new base::Mutex();
DCHECK_NULL(i_cache_);
i_cache_ = new base::CustomMatcherHashMap(&Simulator::ICacheMatch);
}
// static
void SimulatorBase::GlobalTearDown() {
delete redirection_mutex_;
redirection_mutex_ = nullptr;
Redirection::DeleteChain(redirection_);
redirection_ = nullptr;
delete i_cache_mutex_;
i_cache_mutex_ = nullptr;
if (i_cache_ != nullptr) {
for (base::HashMap::Entry* entry = i_cache_->Start(); entry != nullptr;
entry = i_cache_->Next(entry)) {
delete static_cast<CachePage*>(entry->value);
}
}
delete i_cache_;
i_cache_ = nullptr;
}
// static
void SimulatorBase::Initialize(Isolate* isolate) {
ExternalReference::set_redirector(isolate, &RedirectExternalReference);
}
// static
void* SimulatorBase::RedirectExternalReference(void* external_function,
ExternalReference::Type type) {
base::LockGuard<base::Mutex> lock_guard(Simulator::redirection_mutex());
Redirection* redirection = Redirection::Get(external_function, type);
return redirection->address_of_instruction();
}
Redirection::Redirection(void* external_function, ExternalReference::Type type)
: external_function_(external_function), type_(type), next_(nullptr) {
next_ = Simulator::redirection();
base::LockGuard<base::Mutex> lock_guard(Simulator::i_cache_mutex());
Simulator::SetRedirectInstruction(
reinterpret_cast<Instruction*>(address_of_instruction()));
Simulator::FlushICache(Simulator::i_cache(),
reinterpret_cast<void*>(&instruction_),
sizeof(instruction_));
Simulator::set_redirection(this);
#if ABI_USES_FUNCTION_DESCRIPTORS
function_descriptor_[0] = reinterpret_cast<intptr_t>(&instruction_);
function_descriptor_[1] = 0;
function_descriptor_[2] = 0;
#endif
}
// static
Redirection* Redirection::Get(void* external_function,
ExternalReference::Type type) {
Redirection* current = Simulator::redirection();
for (; current != nullptr; current = current->next_) {
if (current->external_function_ == external_function &&
current->type_ == type) {
return current;
}
}
return new Redirection(external_function, type);
}
} // namespace internal
} // namespace v8
#endif // defined(USE_SIMULATOR)