throwable.cc revision 31e88225b2ef68e7f32f11186acf922c74ddabab
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 "base/enums.h" 21#include "class-inl.h" 22#include "dex_file-inl.h" 23#include "gc/accounting/card_table-inl.h" 24#include "object-inl.h" 25#include "object_array.h" 26#include "object_array-inl.h" 27#include "stack_trace_element.h" 28#include "utils.h" 29#include "well_known_classes.h" 30 31namespace art { 32namespace mirror { 33 34GcRoot<Class> Throwable::java_lang_Throwable_; 35 36void Throwable::SetDetailMessage(ObjPtr<String> new_detail_message) { 37 if (Runtime::Current()->IsActiveTransaction()) { 38 SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Throwable, detail_message_), new_detail_message); 39 } else { 40 SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Throwable, detail_message_), 41 new_detail_message); 42 } 43} 44 45void Throwable::SetCause(ObjPtr<Throwable> cause) { 46 CHECK(cause != nullptr); 47 CHECK(cause != this); 48 Throwable* current_cause = GetFieldObject<Throwable>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_)); 49 CHECK(current_cause == nullptr || current_cause == this); 50 if (Runtime::Current()->IsActiveTransaction()) { 51 SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_), cause); 52 } else { 53 SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_), cause); 54 } 55} 56 57void Throwable::SetStackState(ObjPtr<Object> state) REQUIRES_SHARED(Locks::mutator_lock_) { 58 CHECK(state != nullptr); 59 if (Runtime::Current()->IsActiveTransaction()) { 60 SetFieldObjectVolatile<true>(OFFSET_OF_OBJECT_MEMBER(Throwable, backtrace_), state); 61 } else { 62 SetFieldObjectVolatile<false>(OFFSET_OF_OBJECT_MEMBER(Throwable, backtrace_), state); 63 } 64} 65 66bool Throwable::IsCheckedException() { 67 if (InstanceOf(WellKnownClasses::ToClass(WellKnownClasses::java_lang_Error))) { 68 return false; 69 } 70 return !InstanceOf(WellKnownClasses::ToClass(WellKnownClasses::java_lang_RuntimeException)); 71} 72 73int32_t Throwable::GetStackDepth() { 74 ObjPtr<Object> stack_state = GetStackState(); 75 if (stack_state == nullptr || !stack_state->IsObjectArray()) { 76 return -1; 77 } 78 ObjPtr<mirror::ObjectArray<Object>> const trace = stack_state->AsObjectArray<Object>(); 79 const int32_t array_len = trace->GetLength(); 80 DCHECK_GT(array_len, 0); 81 // See method BuildInternalStackTraceVisitor::Init for the format. 82 return array_len - 1; 83} 84 85std::string Throwable::Dump() { 86 std::string result(PrettyTypeOf(this)); 87 result += ": "; 88 ObjPtr<String> msg = GetDetailMessage(); 89 if (msg != nullptr) { 90 result += msg->ToModifiedUtf8(); 91 } 92 result += "\n"; 93 ObjPtr<Object> stack_state = GetStackState(); 94 // check stack state isn't missing or corrupt 95 if (stack_state != nullptr && stack_state->IsObjectArray()) { 96 ObjPtr<ObjectArray<Object>> object_array = stack_state->AsObjectArray<Object>(); 97 // Decode the internal stack trace into the depth and method trace 98 // See method BuildInternalStackTraceVisitor::Init for the format. 99 DCHECK_GT(object_array->GetLength(), 0); 100 ObjPtr<Object> methods_and_dex_pcs = object_array->Get(0); 101 DCHECK(methods_and_dex_pcs->IsIntArray() || methods_and_dex_pcs->IsLongArray()); 102 ObjPtr<PointerArray> method_trace = ObjPtr<PointerArray>::DownCast(methods_and_dex_pcs); 103 const int32_t array_len = method_trace->GetLength(); 104 CHECK_EQ(array_len % 2, 0); 105 const auto depth = array_len / 2; 106 if (depth == 0) { 107 result += "(Throwable with empty stack trace)"; 108 } else { 109 const PointerSize ptr_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 110 for (int32_t i = 0; i < depth; ++i) { 111 ArtMethod* method = method_trace->GetElementPtrSize<ArtMethod*>(i, ptr_size); 112 uintptr_t dex_pc = method_trace->GetElementPtrSize<uintptr_t>(i + depth, ptr_size); 113 int32_t line_number = method->GetLineNumFromDexPC(dex_pc); 114 const char* source_file = method->GetDeclaringClassSourceFile(); 115 result += StringPrintf(" at %s (%s:%d)\n", PrettyMethod(method, true).c_str(), 116 source_file, line_number); 117 } 118 } 119 } else { 120 ObjPtr<Object> stack_trace = GetStackTrace(); 121 if (stack_trace != nullptr && stack_trace->IsObjectArray()) { 122 CHECK_EQ(stack_trace->GetClass()->GetComponentType(), 123 StackTraceElement::GetStackTraceElement()); 124 ObjPtr<ObjectArray<StackTraceElement>> ste_array = 125 ObjPtr<ObjectArray<StackTraceElement>>::DownCast(stack_trace); 126 if (ste_array->GetLength() == 0) { 127 result += "(Throwable with empty stack trace)"; 128 } else { 129 for (int32_t i = 0; i < ste_array->GetLength(); ++i) { 130 StackTraceElement* ste = ste_array->Get(i); 131 DCHECK(ste != nullptr); 132 auto* method_name = ste->GetMethodName(); 133 auto* file_name = ste->GetFileName(); 134 result += StringPrintf( 135 " at %s (%s:%d)\n", 136 method_name != nullptr ? method_name->ToModifiedUtf8().c_str() : "<unknown method>", 137 file_name != nullptr ? file_name->ToModifiedUtf8().c_str() : "(Unknown Source)", 138 ste->GetLineNumber()); 139 } 140 } 141 } else { 142 result += "(Throwable with no stack trace)"; 143 } 144 } 145 ObjPtr<Throwable> cause = GetFieldObject<Throwable>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_)); 146 if (cause != nullptr && cause != this) { // Constructor makes cause == this by default. 147 result += "Caused by: "; 148 result += cause->Dump(); 149 } 150 return result; 151} 152 153void Throwable::SetClass(ObjPtr<Class> java_lang_Throwable) { 154 CHECK(java_lang_Throwable_.IsNull()); 155 CHECK(java_lang_Throwable != nullptr); 156 java_lang_Throwable_ = GcRoot<Class>(java_lang_Throwable); 157} 158 159void Throwable::ResetClass() { 160 CHECK(!java_lang_Throwable_.IsNull()); 161 java_lang_Throwable_ = GcRoot<Class>(nullptr); 162} 163 164void Throwable::VisitRoots(RootVisitor* visitor) { 165 java_lang_Throwable_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass)); 166} 167 168} // namespace mirror 169} // namespace art 170