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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 RUNTIME_VM_RUNTIME_ENTRY_H_
#define RUNTIME_VM_RUNTIME_ENTRY_H_
#include "vm/allocation.h"
#if !defined(DART_PRECOMPILED_RUNTIME)
#include "vm/compiler/runtime_api.h"
#endif
#include "vm/flags.h"
#include "vm/heap/safepoint.h"
#include "vm/log.h"
#include "vm/native_arguments.h"
#include "vm/runtime_entry_list.h"
namespace dart {
typedef void (*RuntimeFunction)(NativeArguments arguments);
#if !defined(DART_PRECOMPILED_RUNTIME)
using BaseRuntimeEntry = compiler::RuntimeEntry;
#else
using BaseRuntimeEntry = ValueObject;
#endif
// 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 BaseRuntimeEntry {
public:
RuntimeEntry(const char* name,
RuntimeFunction function,
intptr_t argument_count,
bool is_leaf,
bool is_float,
bool can_lazy_deopt)
:
#if !defined(DART_PRECOMPILED_RUNTIME)
compiler::RuntimeEntry(this),
#endif
name_(name),
function_(function),
argument_count_(argument_count),
is_leaf_(is_leaf),
is_float_(is_float),
can_lazy_deopt_(can_lazy_deopt) {
}
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_; }
bool can_lazy_deopt() const { return can_lazy_deopt_; }
uword GetEntryPoint() const;
private:
const char* const name_;
const RuntimeFunction function_;
const intptr_t argument_count_;
const bool is_leaf_;
const bool is_float_;
const bool can_lazy_deopt_;
DISALLOW_COPY_AND_ASSIGN(RuntimeEntry);
};
#ifdef DEBUG
#define TRACE_RUNTIME_CALL(format, name) \
if (FLAG_trace_runtime_calls) { \
THR_Print("Runtime call: " format "\n", name); \
}
#else
#define TRACE_RUNTIME_CALL(format, name) \
do { \
} while (0)
#endif
#if defined(USING_SIMULATOR)
#define CHECK_SIMULATOR_STACK_OVERFLOW() \
if (!OSThread::Current()->HasStackHeadroom()) { \
Exceptions::ThrowStackOverflow(); \
}
#else
#define CHECK_SIMULATOR_STACK_OVERFLOW()
#endif // defined(USING_SIMULATOR)
// Helper macros for declaring and defining runtime entries.
#define DEFINE_RUNTIME_ENTRY_IMPL(name, argument_count, can_lazy_deopt) \
extern void DRT_##name(NativeArguments arguments); \
extern const RuntimeEntry k##name##RuntimeEntry("DRT_" #name, &DRT_##name, \
argument_count, false, \
false, can_lazy_deopt); \
static void DRT_Helper##name(Isolate* isolate, Thread* thread, Zone* zone, \
NativeArguments arguments); \
void DRT_##name(NativeArguments arguments) { \
CHECK_STACK_ALIGNMENT; \
/* Tell MemorySanitizer 'arguments' is initialized by generated code. */ \
MSAN_UNPOISON(&arguments, sizeof(arguments)); \
ASSERT(arguments.ArgCount() == argument_count); \
TRACE_RUNTIME_CALL("%s", "" #name); \
{ \
Thread* thread = arguments.thread(); \
ASSERT(thread == Thread::Current()); \
RuntimeCallDeoptScope runtime_call_deopt_scope( \
thread, can_lazy_deopt ? RuntimeCallDeoptAbility::kCanLazyDeopt \
: RuntimeCallDeoptAbility::kCannotLazyDeopt); \
Isolate* isolate = thread->isolate(); \
TransitionGeneratedToVM transition(thread); \
StackZone zone(thread); \
CHECK_SIMULATOR_STACK_OVERFLOW(); \
if (FLAG_deoptimize_on_runtime_call_every > 0) { \
OnEveryRuntimeEntryCall(thread, "" #name, can_lazy_deopt); \
} \
DRT_Helper##name(isolate, thread, zone.GetZone(), arguments); \
} \
} \
static void DRT_Helper##name(Isolate* isolate, Thread* thread, Zone* zone, \
NativeArguments arguments)
#define DEFINE_RUNTIME_ENTRY(name, argument_count) \
DEFINE_RUNTIME_ENTRY_IMPL(name, argument_count, /*can_lazy_deopt=*/true)
#define DEFINE_RUNTIME_ENTRY_NO_LAZY_DEOPT(name, argument_count) \
DEFINE_RUNTIME_ENTRY_IMPL(name, argument_count, /*can_lazy_deopt=*/false)
#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, /*can_lazy_deopt=*/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 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, \
/*can_lazy_deopt=*/false)
#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)
// Expected to be called inside a safepoint.
extern "C" Thread* DLRT_GetThreadForNativeCallback(uword callback_id);
extern "C" Thread* DLRT_GetThreadForNativeCallbackTrampoline(uword callback_id);
// For creating scoped handles in FFI trampolines.
extern "C" ApiLocalScope* DLRT_EnterHandleScope(Thread* thread);
extern "C" void DLRT_ExitHandleScope(Thread* thread);
extern "C" LocalHandle* DLRT_AllocateHandle(ApiLocalScope* scope);
const char* DeoptReasonToCString(ICData::DeoptReasonId deopt_reason);
void OnEveryRuntimeEntryCall(Thread* thread,
const char* runtime_call_name,
bool can_lazy_deopt);
void DeoptimizeAt(Thread* mutator_thread,
const Code& optimized_code,
StackFrame* frame);
void DeoptimizeFunctionsOnStack();
double DartModulo(double a, double b);
} // namespace dart
#endif // RUNTIME_VM_RUNTIME_ENTRY_H_