throwable.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 "throwable.h"
18
19#include "art_method-inl.h"
20#include "class-inl.h"
21#include "dex_file-inl.h"
22#include "gc/accounting/card_table-inl.h"
23#include "object-inl.h"
24#include "object_array.h"
25#include "object_array-inl.h"
26#include "stack_trace_element.h"
27#include "utils.h"
28#include "well_known_classes.h"
29
30namespace art {
31namespace mirror {
32
33GcRoot<Class> Throwable::java_lang_Throwable_;
34
35void Throwable::SetDetailMessage(String* new_detail_message) {
36  if (Runtime::Current()->IsActiveTransaction()) {
37    SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Throwable, detail_message_), new_detail_message);
38  } else {
39    SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Throwable, detail_message_),
40                          new_detail_message);
41  }
42}
43
44void Throwable::SetCause(Throwable* cause) {
45  CHECK(cause != nullptr);
46  CHECK(cause != this);
47  Throwable* current_cause = GetFieldObject<Throwable>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_));
48  CHECK(current_cause == NULL || current_cause == this);
49  if (Runtime::Current()->IsActiveTransaction()) {
50    SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_), cause);
51  } else {
52    SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_), cause);
53  }
54}
55
56void Throwable::SetStackState(Object* state) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
57  CHECK(state != nullptr);
58  if (Runtime::Current()->IsActiveTransaction()) {
59    SetFieldObjectVolatile<true>(OFFSET_OF_OBJECT_MEMBER(Throwable, stack_state_), state);
60  } else {
61    SetFieldObjectVolatile<false>(OFFSET_OF_OBJECT_MEMBER(Throwable, stack_state_), state);
62  }
63}
64
65bool Throwable::IsCheckedException() {
66  if (InstanceOf(WellKnownClasses::ToClass(WellKnownClasses::java_lang_Error))) {
67    return false;
68  }
69  return !InstanceOf(WellKnownClasses::ToClass(WellKnownClasses::java_lang_RuntimeException));
70}
71
72std::string Throwable::Dump() {
73  std::string result(PrettyTypeOf(this));
74  result += ": ";
75  String* msg = GetDetailMessage();
76  if (msg != NULL) {
77    result += msg->ToModifiedUtf8();
78  }
79  result += "\n";
80  Object* stack_state = GetStackState();
81  // check stack state isn't missing or corrupt
82  if (stack_state != nullptr && stack_state->IsObjectArray()) {
83    // Decode the internal stack trace into the depth and method trace
84    ObjectArray<Object>* method_trace = down_cast<ObjectArray<Object>*>(stack_state);
85    int32_t depth = method_trace->GetLength() - 1;
86    IntArray* pc_trace = down_cast<IntArray*>(method_trace->Get(depth));
87    if (depth == 0) {
88      result += "(Throwable with empty stack trace)";
89    } else {
90      for (int32_t i = 0; i < depth; ++i) {
91        mirror::ArtMethod* method = down_cast<ArtMethod*>(method_trace->Get(i));
92        uint32_t dex_pc = pc_trace->Get(i);
93        int32_t line_number = method->GetLineNumFromDexPC(dex_pc);
94        const char* source_file = method->GetDeclaringClassSourceFile();
95        result += StringPrintf("  at %s (%s:%d)\n", PrettyMethod(method, true).c_str(),
96                               source_file, line_number);
97      }
98    }
99  } else {
100    Object* stack_trace = GetStackTrace();
101    if (stack_trace != nullptr && stack_trace->IsObjectArray()) {
102      CHECK_EQ(stack_trace->GetClass()->GetComponentType(),
103               StackTraceElement::GetStackTraceElement());
104      ObjectArray<StackTraceElement>* ste_array =
105          down_cast<ObjectArray<StackTraceElement>*>(stack_trace);
106      if (ste_array->GetLength() == 0) {
107        result += "(Throwable with empty stack trace)";
108      } else {
109        for (int32_t i = 0; i < ste_array->GetLength(); ++i) {
110          StackTraceElement* ste = ste_array->Get(i);
111          result += StringPrintf("  at %s (%s:%d)\n",
112                                 ste->GetMethodName()->ToModifiedUtf8().c_str(),
113                                 ste->GetFileName()->ToModifiedUtf8().c_str(),
114                                 ste->GetLineNumber());
115        }
116      }
117    } else {
118      result += "(Throwable with no stack trace)";
119    }
120  }
121  Throwable* cause = GetFieldObject<Throwable>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_));
122  if (cause != nullptr && cause != this) {  // Constructor makes cause == this by default.
123    result += "Caused by: ";
124    result += cause->Dump();
125  }
126  return result;
127}
128
129void Throwable::SetClass(Class* java_lang_Throwable) {
130  CHECK(java_lang_Throwable_.IsNull());
131  CHECK(java_lang_Throwable != NULL);
132  java_lang_Throwable_ = GcRoot<Class>(java_lang_Throwable);
133}
134
135void Throwable::ResetClass() {
136  CHECK(!java_lang_Throwable_.IsNull());
137  java_lang_Throwable_ = GcRoot<Class>(nullptr);
138}
139
140void Throwable::VisitRoots(RootCallback* callback, void* arg) {
141  if (!java_lang_Throwable_.IsNull()) {
142    java_lang_Throwable_.VisitRoot(callback, arg, 0, kRootStickyClass);
143  }
144}
145
146}  // namespace mirror
147}  // namespace art
148