tball@google.com
76d7c9b105
BUG= Review URL: https://codereview.chromium.org//11040062 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@13314 260f80e4-7a28-3924-810f-c04153c831b5
92 lines
3.9 KiB
C++
92 lines
3.9 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_RUNTIME_ENTRY_H_
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#define VM_RUNTIME_ENTRY_H_
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#include "vm/allocation.h"
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#include "vm/assembler.h"
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#include "vm/flags.h"
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#include "vm/native_arguments.h"
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namespace dart {
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DECLARE_FLAG(bool, trace_runtime_calls);
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typedef void (*RuntimeFunction)(NativeArguments arguments);
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// Class RuntimeEntry is used to encapsulate runtime functions, it includes
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// the entry point for the runtime function and the number of arguments expected
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// by the function.
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class RuntimeEntry : public ValueObject {
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public:
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RuntimeEntry(const char* name, RuntimeFunction function,
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int argument_count, bool is_leaf)
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: name_(name),
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function_(function),
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argument_count_(argument_count),
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is_leaf_(is_leaf) { }
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~RuntimeEntry() {}
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const char* name() const { return name_; }
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RuntimeFunction function() const { return function_; }
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int argument_count() const { return argument_count_; }
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bool is_leaf() const { return is_leaf_; }
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uword GetEntryPoint() const { return reinterpret_cast<uword>(function()); }
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// Generate code to call the runtime entry.
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void Call(Assembler* assembler) const;
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private:
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const char* name_;
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const RuntimeFunction function_;
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const int argument_count_;
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const bool is_leaf_;
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DISALLOW_COPY_AND_ASSIGN(RuntimeEntry);
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};
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// Helper macros for declaring and defining runtime entries.
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#define DEFINE_RUNTIME_ENTRY(name, argument_count) \
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extern void DRT_##name(NativeArguments arguments); \
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extern const RuntimeEntry k##name##RuntimeEntry( \
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"DRT_"#name, &DRT_##name, argument_count, false); \
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static void DRT_Helper##name(Isolate* isolate, NativeArguments arguments); \
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void DRT_##name(NativeArguments arguments) { \
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CHECK_STACK_ALIGNMENT; \
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VERIFY_ON_TRANSITION; \
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if (FLAG_trace_runtime_calls) OS::Print("Runtime call: %s\n", ""#name); \
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{ \
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StackZone zone(arguments.isolate()); \
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HANDLESCOPE(arguments.isolate()); \
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DRT_Helper##name(arguments.isolate(), arguments); \
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} \
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VERIFY_ON_TRANSITION; \
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} \
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static void DRT_Helper##name(Isolate* isolate, NativeArguments arguments)
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#define DECLARE_RUNTIME_ENTRY(name) \
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extern const RuntimeEntry k##name##RuntimeEntry
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#define DEFINE_LEAF_RUNTIME_ENTRY(type, name, ...) \
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extern "C" type DLRT_##name(__VA_ARGS__); \
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extern const RuntimeEntry k##name##RuntimeEntry( \
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"DLRT_"#name, reinterpret_cast<RuntimeFunction>(&DLRT_##name), 0, true); \
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type DLRT_##name(__VA_ARGS__) { \
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CHECK_STACK_ALIGNMENT; \
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NoGCScope no_gc_scope; \
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#define END_LEAF_RUNTIME_ENTRY }
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#define DECLARE_LEAF_RUNTIME_ENTRY(type, name, ...) \
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extern const RuntimeEntry k##name##RuntimeEntry; \
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extern "C" type DLRT_##name(__VA_ARGS__)
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} // namespace dart
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#endif // VM_RUNTIME_ENTRY_H_
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