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// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef VM_RUNTIME_ENTRY_H_
#define VM_RUNTIME_ENTRY_H_
#include "vm/allocation.h"
#include "vm/assembler.h"
#include "vm/flags.h"
#include "vm/native_arguments.h"
namespace dart {
DECLARE_FLAG(bool, trace_runtime_calls);
typedef void (*RuntimeFunction)(NativeArguments arguments);
// Class RuntimeEntry is used to encapsulate runtime functions, it includes
// the entry point for the runtime function and the number of arguments expected
// by the function.
class RuntimeEntry : public ValueObject {
public:
RuntimeEntry(const char* name, RuntimeFunction function,
int argument_count, bool is_leaf)
: name_(name),
function_(function),
argument_count_(argument_count),
is_leaf_(is_leaf) { }
~RuntimeEntry() {}
const char* name() const { return name_; }
RuntimeFunction function() const { return function_; }
int argument_count() const { return argument_count_; }
bool is_leaf() const { return is_leaf_; }
uword GetEntryPoint() const { return reinterpret_cast<uword>(function()); }
// Generate code to call the runtime entry.
void Call(Assembler* assembler) const;
private:
const char* name_;
const RuntimeFunction function_;
const int argument_count_;
const bool is_leaf_;
DISALLOW_COPY_AND_ASSIGN(RuntimeEntry);
};
// Helper macros for declaring and defining runtime entries.
#define DEFINE_RUNTIME_ENTRY(name, argument_count) \
extern void DRT_##name(NativeArguments arguments); \
extern const RuntimeEntry k##name##RuntimeEntry( \
"DRT_"#name, &DRT_##name, argument_count, false); \
static void DRT_Helper##name(Isolate* isolate, NativeArguments arguments); \
void DRT_##name(NativeArguments arguments) { \
CHECK_STACK_ALIGNMENT; \
VERIFY_ON_TRANSITION; \
if (FLAG_trace_runtime_calls) OS::Print("Runtime call: %s\n", ""#name); \
{ \
StackZone zone(arguments.isolate()); \
HANDLESCOPE(arguments.isolate()); \
DRT_Helper##name(arguments.isolate(), arguments); \
} \
VERIFY_ON_TRANSITION; \
} \
static void DRT_Helper##name(Isolate* isolate, NativeArguments arguments)
#define DECLARE_RUNTIME_ENTRY(name) \
extern const RuntimeEntry k##name##RuntimeEntry
#define DEFINE_LEAF_RUNTIME_ENTRY(type, name, ...) \
extern "C" type DLRT_##name(__VA_ARGS__); \
extern const RuntimeEntry k##name##RuntimeEntry( \
"DLRT_"#name, reinterpret_cast<RuntimeFunction>(&DLRT_##name), 0, true); \
type DLRT_##name(__VA_ARGS__) { \
CHECK_STACK_ALIGNMENT; \
NoGCScope no_gc_scope; \
#define END_LEAF_RUNTIME_ENTRY }
#define DECLARE_LEAF_RUNTIME_ENTRY(type, name, ...) \
extern const RuntimeEntry k##name##RuntimeEntry; \
extern "C" type DLRT_##name(__VA_ARGS__)
} // namespace dart
#endif // VM_RUNTIME_ENTRY_H_