stack_trace_element.cc revision 83c8ee000d525017ead8753fce6bc1020249b96a 
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 "string.h"
24
25namespace art {
26namespace mirror {
27
28Class* StackTraceElement::java_lang_StackTraceElement_ = NULL;
29
30void StackTraceElement::SetClass(Class* java_lang_StackTraceElement) {
31  CHECK(java_lang_StackTraceElement_ == NULL);
32  CHECK(java_lang_StackTraceElement != NULL);
33  java_lang_StackTraceElement_ = java_lang_StackTraceElement;
34}
35
36void StackTraceElement::ResetClass() {
37  CHECK(java_lang_StackTraceElement_ != NULL);
38  java_lang_StackTraceElement_ = NULL;
39}
40
41StackTraceElement* StackTraceElement::Alloc(Thread* self,
42                                            SirtRef<String>& declaring_class,
43                                            SirtRef<String>& method_name,
44                                            SirtRef<String>& file_name,
45                                            int32_t line_number) {
46  StackTraceElement* trace =
47      down_cast<StackTraceElement*>(GetStackTraceElement()->AllocObject(self));
48  if (LIKELY(trace != NULL)) {
49    trace->SetFieldObject(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, declaring_class_),
50                          declaring_class.get(), false);
51    trace->SetFieldObject(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, method_name_),
52                          method_name.get(), false);
53    trace->SetFieldObject(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, file_name_),
54                          file_name.get(), false);
55    trace->SetField32(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, line_number_),
56                      line_number, false);
57  }
58  return trace;
59}
60
61void StackTraceElement::VisitRoots(RootCallback* callback, void* arg) {
62  if (java_lang_StackTraceElement_ != nullptr) {
63    java_lang_StackTraceElement_ = down_cast<Class*>(
64        callback(java_lang_StackTraceElement_, arg, 0, kRootStickyClass));
65  }
66}
67
68
69}  // namespace mirror
70}  // namespace art
71