stack_trace_element.cc revision 94f7b49578b6aaa80de8ffed230648d601393905 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "stack_trace_element.h"
18
19#include "class.h"
20#include "class-inl.h"
21#include "gc/accounting/card_table-inl.h"
22#include "object-inl.h"
23#include "handle_scope-inl.h"
24#include "string.h"
25
26namespace art {
27namespace mirror {
28
29GcRoot<Class> StackTraceElement::java_lang_StackTraceElement_;
30
31void StackTraceElement::SetClass(Class* java_lang_StackTraceElement) {
32  CHECK(java_lang_StackTraceElement_.IsNull());
33  CHECK(java_lang_StackTraceElement != NULL);
34  java_lang_StackTraceElement_ = GcRoot<Class>(java_lang_StackTraceElement);
35}
36
37void StackTraceElement::ResetClass() {
38  CHECK(!java_lang_StackTraceElement_.IsNull());
39  java_lang_StackTraceElement_ = GcRoot<Class>(nullptr);
40}
41
42StackTraceElement* StackTraceElement::Alloc(Thread* self, Handle<String> declaring_class,
43                                            Handle<String> method_name, Handle<String> file_name,
44                                            int32_t line_number) {
45  StackTraceElement* trace =
46      down_cast<StackTraceElement*>(GetStackTraceElement()->AllocObject(self));
47  if (LIKELY(trace != NULL)) {
48    if (Runtime::Current()->IsActiveTransaction()) {
49      trace->Init<true>(declaring_class, method_name, file_name, line_number);
50    } else {
51      trace->Init<false>(declaring_class, method_name, file_name, line_number);
52    }
53  }
54  return trace;
55}
56
57template<bool kTransactionActive>
58void StackTraceElement::Init(Handle<String> declaring_class, Handle<String> method_name,
59                             Handle<String> file_name, int32_t line_number) {
60  SetFieldObject<kTransactionActive>(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, declaring_class_),
61                                     declaring_class.Get());
62  SetFieldObject<kTransactionActive>(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, method_name_),
63                                     method_name.Get());
64  SetFieldObject<kTransactionActive>(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, file_name_),
65                                     file_name.Get());
66  SetField32<kTransactionActive>(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, line_number_),
67                                 line_number);
68}
69
70void StackTraceElement::VisitRoots(RootCallback* callback, void* arg) {
71  if (!java_lang_StackTraceElement_.IsNull()) {
72    java_lang_StackTraceElement_.VisitRoot(callback, arg, 0, kRootStickyClass);
73  }
74}
75
76
77}  // namespace mirror
78}  // namespace art
79