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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/flags.h"
#include "vm/native_arguments.h"
#include "vm/runtime_entry_list.h"
#include "vm/tags.h"
namespace dart {
class Assembler;
DECLARE_FLAG(bool, trace_runtime_calls);
typedef void (*RuntimeFunction)(NativeArguments arguments);
enum RuntimeFunctionId {
kNoRuntimeFunctionId = -1,
#define DECLARE_ENUM_VALUE(name) \
k##name##Id,
RUNTIME_ENTRY_LIST(DECLARE_ENUM_VALUE)
#undef DECLARE_ENUM_VALUE
#define DECLARE_LEAF_ENUM_VALUE(type, name, ...) \
k##name##Id,
LEAF_RUNTIME_ENTRY_LIST(DECLARE_LEAF_ENUM_VALUE)
#undef DECLARE_LEAF_ENUM_VALUE
};
// 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,
intptr_t argument_count, bool is_leaf, bool is_float)
: name_(name),
function_(function),
argument_count_(argument_count),
is_leaf_(is_leaf),
is_float_(is_float),
next_(NULL) {
// Strip off const for registration.
VMTag::RegisterRuntimeEntry(const_cast<RuntimeEntry*>(this));
}
~RuntimeEntry() {}
const char* name() const { return name_; }
RuntimeFunction function() const { return function_; }
intptr_t argument_count() const { return argument_count_; }
bool is_leaf() const { return is_leaf_; }
bool is_float() const { return is_float_; }
uword GetEntryPoint() const;
// Generate code to call the runtime entry.
void Call(Assembler* assembler, intptr_t argument_count) const;
void set_next(const RuntimeEntry* next) { next_ = next; }
const RuntimeEntry* next() const { return next_; }
static inline uword AddressFromId(RuntimeFunctionId id);
static inline RuntimeFunctionId RuntimeFunctionIdFromAddress(uword address);
private:
const char* name_;
const RuntimeFunction function_;
const intptr_t argument_count_;
const bool is_leaf_;
const bool is_float_;
const RuntimeEntry* next_;
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, false); \
static void DRT_Helper##name(Isolate* isolate, \
Thread* thread, \
Zone* zone, \
NativeArguments arguments); \
void DRT_##name(NativeArguments arguments) { \
CHECK_STACK_ALIGNMENT; \
VERIFY_ON_TRANSITION; \
ASSERT(arguments.ArgCount() == argument_count); \
if (FLAG_trace_runtime_calls) OS::Print("Runtime call: %s\n", ""#name); \
{ \
Thread* thread = arguments.thread(); \
ASSERT(thread == Thread::Current()); \
Isolate* isolate = thread->isolate(); \
StackZone zone(thread); \
HANDLESCOPE(thread); \
DRT_Helper##name(isolate, thread, zone.GetZone(), arguments); \
} \
VERIFY_ON_TRANSITION; \
} \
static void DRT_Helper##name(Isolate* isolate, \
Thread* thread, \
Zone* zone, \
NativeArguments arguments)
#define DECLARE_RUNTIME_ENTRY(name) \
extern const RuntimeEntry k##name##RuntimeEntry; \
extern void DRT_##name(NativeArguments arguments); \
#define DEFINE_LEAF_RUNTIME_ENTRY(type, name, argument_count, ...) \
extern "C" type DLRT_##name(__VA_ARGS__); \
extern const RuntimeEntry k##name##RuntimeEntry( \
"DLRT_"#name, reinterpret_cast<RuntimeFunction>(&DLRT_##name), \
argument_count, true, false); \
type DLRT_##name(__VA_ARGS__) { \
CHECK_STACK_ALIGNMENT; \
NoSafepointScope no_safepoint_scope; \
#define END_LEAF_RUNTIME_ENTRY }
// TODO(rmacnak): Fix alignment issue on simarm and simmips and use
// DEFINE_LEAF_RUNTIME_ENTRY instead.
#define DEFINE_RAW_LEAF_RUNTIME_ENTRY(name, argument_count, is_float, func) \
extern const RuntimeEntry k##name##RuntimeEntry( \
"DFLRT_"#name, func, argument_count, true, is_float) \
#define DECLARE_LEAF_RUNTIME_ENTRY(type, name, ...) \
extern const RuntimeEntry k##name##RuntimeEntry; \
extern "C" type DLRT_##name(__VA_ARGS__); \
// Declare all runtime functions here.
RUNTIME_ENTRY_LIST(DECLARE_RUNTIME_ENTRY)
LEAF_RUNTIME_ENTRY_LIST(DECLARE_LEAF_RUNTIME_ENTRY)
// Declare all runtime functions here.
RUNTIME_ENTRY_LIST(DECLARE_RUNTIME_ENTRY)
LEAF_RUNTIME_ENTRY_LIST(DECLARE_LEAF_RUNTIME_ENTRY)
uword RuntimeEntry::AddressFromId(RuntimeFunctionId id) {
switch (id) {
#define DEFINE_RUNTIME_CASE(name) \
case k##name##Id: return k##name##RuntimeEntry.GetEntryPoint();
RUNTIME_ENTRY_LIST(DEFINE_RUNTIME_CASE)
#undef DEFINE_RUNTIME_CASE
#define DEFINE_LEAF_RUNTIME_CASE(type, name, ...) \
case k##name##Id: return k##name##RuntimeEntry.GetEntryPoint();
LEAF_RUNTIME_ENTRY_LIST(DEFINE_LEAF_RUNTIME_CASE)
#undef DEFINE_LEAF_RUNTIME_CASE
default:
break;
}
return 0;
}
RuntimeFunctionId RuntimeEntry::RuntimeFunctionIdFromAddress(uword address) {
#define CHECK_RUNTIME_ADDRESS(name) \
if (address == k##name##RuntimeEntry.GetEntryPoint()) return k##name##Id;
RUNTIME_ENTRY_LIST(CHECK_RUNTIME_ADDRESS)
#undef CHECK_RUNTIME_ADDRESS
#define CHECK_LEAF_RUNTIME_ADDRESS(type, name, ...) \
if (address == k##name##RuntimeEntry.GetEntryPoint()) return k##name##Id;
LEAF_RUNTIME_ENTRY_LIST(CHECK_LEAF_RUNTIME_ADDRESS)
#undef CHECK_LEAF_RUNTIME_ADDRESS
return kNoRuntimeFunctionId;
}
} // namespace dart
#endif // VM_RUNTIME_ENTRY_H_