Revert "Revert "Introduce support for hardware simulators, starting with ARM64""

This reverts commit 4cd27d64b0bbdde61fa3f6674ceb24221853ac2c.

This depends on VIXL 1.11.

Change-Id: I402c1fd6bbb218ba80ef8e59af203c9276151059

1 files changed, 55 insertions, 0 deletions

diff --git a/runtime/code_simulator_container.cc b/runtime/code_simulator_container.cc
new file mode 100644
index 0000000000..d884c58782
--- /dev/null
+++ b/runtime/code_simulator_container.cc
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2015 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 <dlfcn.h>
+
+#include "code_simulator_container.h"
+#include "globals.h"
+
+namespace art {
+
+CodeSimulatorContainer::CodeSimulatorContainer(InstructionSet target_isa)
+    : libart_simulator_handle_(nullptr),
+      simulator_(nullptr) {
+  const char* libart_simulator_so_name =
+      kIsDebugBuild ? "libartd-simulator.so" : "libart-simulator.so";
+  libart_simulator_handle_ = dlopen(libart_simulator_so_name, RTLD_NOW);
+  // It is not a real error when libart-simulator does not exist, e.g., on target.
+  if (libart_simulator_handle_ == nullptr) {
+    VLOG(simulator) << "Could not load " << libart_simulator_so_name << ": " << dlerror();
+  } else {
+    typedef CodeSimulator* (*create_code_simulator_ptr_)(InstructionSet target_isa);
+    create_code_simulator_ptr_ create_code_simulator_ =
+        reinterpret_cast<create_code_simulator_ptr_>(
+            dlsym(libart_simulator_handle_, "CreateCodeSimulator"));
+    DCHECK(create_code_simulator_ != nullptr) << "Fail to find symbol of CreateCodeSimulator: "
+        << dlerror();
+    simulator_ = create_code_simulator_(target_isa);
+  }
+}
+
+CodeSimulatorContainer::~CodeSimulatorContainer() {
+  // Free simulator object before closing libart-simulator because destructor of
+  // CodeSimulator lives in it.
+  if (simulator_ != nullptr) {
+    delete simulator_;
+  }
+  if (libart_simulator_handle_ != nullptr) {
+    dlclose(libart_simulator_handle_);
+  }
+}
+
+}  // namespace art