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/*
* Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
* Copyright 2008, 2009 Red Hat, Inc.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
class SharkContext;
class SharkCompiler : public AbstractCompiler {
public:
// Creation
SharkCompiler();
// Name of this compiler
const char *name() { return "shark"; }
// Missing feature tests
bool supports_native() { return true; }
bool supports_osr() { return true; }
// Customization
bool needs_adapters() { return false; }
bool needs_stubs() { return false; }
// Initialization
void initialize();
// Compile a normal (bytecode) method and install it in the VM
void compile_method(ciEnv* env, ciMethod* target, int entry_bci);
// Generate a wrapper for a native (JNI) method
nmethod* generate_native_wrapper(MacroAssembler* masm,
methodHandle target,
BasicType* arg_types,
BasicType return_type);
// Free compiled methods (and native wrappers)
void free_compiled_method(address code);
// Each thread generating IR needs its own context. The normal
// context is used for bytecode methods, and is protected from
// multiple simultaneous accesses by being restricted to the
// compiler thread. The native context is used for JNI methods,
// and is protected from multiple simultaneous accesses by the
// adapter handler library lock.
private:
SharkContext* _normal_context;
SharkContext* _native_context;
public:
SharkContext* context() const {
if (JavaThread::current()->is_Compiler_thread()) {
return _normal_context;
}
else {
assert(AdapterHandlerLibrary_lock->owned_by_self(), "should be");
return _native_context;
}
}
// The LLVM execution engine is the JIT we use to generate native
// code. It is thread safe, but we need to protect it with a lock
// of our own because otherwise LLVM's lock and HotSpot's locks
// interleave and deadlock. The SharkMemoryManager is not thread
// safe, and is protected by the same lock as the execution engine.
private:
Monitor* _execution_engine_lock;
SharkMemoryManager* _memory_manager;
llvm::ExecutionEngine* _execution_engine;
private:
Monitor* execution_engine_lock() const {
return _execution_engine_lock;
}
SharkMemoryManager* memory_manager() const {
assert(execution_engine_lock()->owned_by_self(), "should be");
return _memory_manager;
}
llvm::ExecutionEngine* execution_engine() const {
assert(execution_engine_lock()->owned_by_self(), "should be");
return _execution_engine;
}
// Global access
public:
static SharkCompiler* compiler() {
AbstractCompiler *compiler = CompileBroker::compiler(CompLevel_simple);
assert(compiler->is_shark() && compiler->is_initialized(), "should be");
return (SharkCompiler *) compiler;
}
// Helpers
private:
static const char* methodname(const char* klass, const char* method);
void generate_native_code(SharkEntry* entry,
llvm::Function* function,
const char* name);
void free_queued_methods();
};
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