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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/native_entry.h" | 5 #include "vm/native_entry.h" |
6 | 6 |
7 #include "include/dart_api.h" | 7 #include "include/dart_api.h" |
8 | 8 |
9 #include "vm/dart_api_impl.h" | 9 #include "vm/dart_api_impl.h" |
| 10 #include "vm/dart_api_state.h" |
10 | 11 |
11 namespace dart { | 12 namespace dart { |
12 | 13 |
13 DEFINE_FLAG(bool, trace_natives, false, "Trace invocation of natives"); | 14 DEFINE_FLAG(bool, trace_natives, false, "Trace invocation of natives"); |
14 | 15 |
15 NativeFunction NativeEntry::ResolveNative(const Class& cls, | 16 |
| 17 static ExternalLabel native_call_label( |
| 18 "native_function_call", |
| 19 reinterpret_cast<uword>(&NativeEntry::NativeCallWrapper)); |
| 20 |
| 21 |
| 22 NativeFunction NativeEntry::ResolveNative(const Library& library, |
16 const String& function_name, | 23 const String& function_name, |
17 int number_of_arguments) { | 24 int number_of_arguments) { |
18 // Now resolve the native function to the corresponding native entrypoint. | 25 // Now resolve the native function to the corresponding native entrypoint. |
19 const Library& library = Library::Handle(cls.library()); | |
20 if (library.native_entry_resolver() == 0) { | 26 if (library.native_entry_resolver() == 0) { |
21 // Native methods are not allowed in the library to which this | 27 // Native methods are not allowed in the library to which this |
22 // class belongs in. | 28 // class belongs in. |
23 return NULL; | 29 return NULL; |
24 } | 30 } |
25 Dart_EnterScope(); // Enter a new Dart API scope as we invoke API entries. | 31 Dart_EnterScope(); // Enter a new Dart API scope as we invoke API entries. |
26 Dart_NativeEntryResolver resolver = library.native_entry_resolver(); | 32 Dart_NativeEntryResolver resolver = library.native_entry_resolver(); |
27 Dart_NativeFunction native_function = | 33 Dart_NativeFunction native_function = |
28 resolver(Api::NewHandle(Isolate::Current(), function_name.raw()), | 34 resolver(Api::NewHandle(Isolate::Current(), function_name.raw()), |
29 number_of_arguments); | 35 number_of_arguments); |
30 Dart_ExitScope(); // Exit the Dart API scope. | 36 Dart_ExitScope(); // Exit the Dart API scope. |
31 return reinterpret_cast<NativeFunction>(native_function); | 37 return reinterpret_cast<NativeFunction>(native_function); |
32 } | 38 } |
33 | 39 |
| 40 |
| 41 const ExternalLabel& NativeEntry::NativeCallWrapperLabel() { |
| 42 return native_call_label; |
| 43 } |
| 44 |
| 45 |
| 46 void NativeEntry::NativeCallWrapper(Dart_NativeArguments args, |
| 47 Dart_NativeFunction func) { |
| 48 CHECK_STACK_ALIGNMENT; |
| 49 VERIFY_ON_TRANSITION; |
| 50 NativeArguments* arguments = reinterpret_cast<NativeArguments*>(args); |
| 51 Isolate* isolate = arguments->isolate(); |
| 52 ApiState* state = isolate->api_state(); |
| 53 ASSERT(state != NULL); |
| 54 ApiLocalScope* current_top_scope = state->top_scope(); |
| 55 ApiLocalScope* scope = state->reusable_scope(); |
| 56 if (scope == NULL) { |
| 57 scope = new ApiLocalScope(current_top_scope, |
| 58 isolate->top_exit_frame_info()); |
| 59 ASSERT(scope != NULL); |
| 60 } else { |
| 61 scope->Reinit(isolate, |
| 62 current_top_scope, |
| 63 isolate->top_exit_frame_info()); |
| 64 state->set_reusable_scope(NULL); |
| 65 } |
| 66 state->set_top_scope(scope); // New scope is now the top scope. |
| 67 |
| 68 func(args); |
| 69 |
| 70 ASSERT(current_top_scope == scope->previous()); |
| 71 state->set_top_scope(current_top_scope); // Reset top scope to previous. |
| 72 if (state->reusable_scope() == NULL) { |
| 73 scope->Reset(isolate); // Reset the old scope which we just exited. |
| 74 state->set_reusable_scope(scope); |
| 75 } else { |
| 76 ASSERT(state->reusable_scope() != scope); |
| 77 delete scope; |
| 78 } |
| 79 DEOPTIMIZE_ALOT; |
| 80 VERIFY_ON_TRANSITION; |
| 81 } |
| 82 |
34 } // namespace dart | 83 } // namespace dart |
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