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Issue 9316071: Dart_PropagateError, take 2. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 8 years, 10 months ago
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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/longjump.h" 5 #include "vm/longjump.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/isolate.h" 10 #include "vm/isolate.h"
11 #include "vm/object.h" 11 #include "vm/object.h"
12 #include "vm/object_store.h" 12 #include "vm/object_store.h"
13 #include "vm/os.h" 13 #include "vm/os.h"
14 14
15 namespace dart { 15 namespace dart {
16 16
17 jmp_buf* LongJump::Set() { 17 jmp_buf* LongJump::Set() {
18 top_ = Isolate::Current()->top_resource(); 18 top_ = Isolate::Current()->top_resource();
19 return &environment_; 19 return &environment_;
20 } 20 }
21 21
22 22
23 bool LongJump::IsSafeToJump() {
24 // We do not want to jump past Dart frames. Note that this code
25 // assumes the stack grows from high to low.
26 Isolate* isolate = Isolate::Current();
27 uword jumpbuf_addr = reinterpret_cast<uword>(this);
28 return (isolate->top_exit_frame_info() == 0 ||
29 jumpbuf_addr < isolate->top_exit_frame_info());
30 }
31
32
23 void LongJump::Jump(int value, const Error& error) { 33 void LongJump::Jump(int value, const Error& error) {
24 // A zero is the default return value from setting up a LongJump using Set. 34 // A zero is the default return value from setting up a LongJump using Set.
25 ASSERT(value != 0); 35 ASSERT(value != 0);
36 ASSERT(IsSafeToJump());
26 37
27 Isolate* isolate = Isolate::Current(); 38 Isolate* isolate = Isolate::Current();
28 39
29 // Remember the error in the sticky error of this isolate. 40 // Remember the error in the sticky error of this isolate.
30 isolate->object_store()->set_sticky_error(error); 41 isolate->object_store()->set_sticky_error(error);
31 42
32 // Destruct all the active StackResource objects. 43 // Destruct all the active StackResource objects.
33 StackResource* current_resource = isolate->top_resource(); 44 StackResource* current_resource = isolate->top_resource();
34 while (current_resource != top_) { 45 while (current_resource != top_) {
35 current_resource->~StackResource(); 46 current_resource->~StackResource();
36 current_resource = isolate->top_resource(); 47 current_resource = isolate->top_resource();
37 } 48 }
38 longjmp(environment_, value); 49 longjmp(environment_, value);
39 UNREACHABLE(); 50 UNREACHABLE();
40 } 51 }
41 52
42 } // namespace dart 53 } // namespace dart
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