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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "throwable.h"
#include "art_method-inl.h"
#include "class-inl.h"
#include "dex_file-inl.h"
#include "gc/accounting/card_table-inl.h"
#include "object-inl.h"
#include "object_array.h"
#include "object_array-inl.h"
#include "stack_trace_element.h"
#include "utils.h"
#include "well_known_classes.h"
namespace art {
namespace mirror {
GcRoot<Class> Throwable::java_lang_Throwable_;
void Throwable::SetDetailMessage(String* new_detail_message) {
if (Runtime::Current()->IsActiveTransaction()) {
SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Throwable, detail_message_), new_detail_message);
} else {
SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Throwable, detail_message_),
new_detail_message);
}
}
void Throwable::SetCause(Throwable* cause) {
CHECK(cause != nullptr);
CHECK(cause != this);
Throwable* current_cause = GetFieldObject<Throwable>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_));
CHECK(current_cause == nullptr || current_cause == this);
if (Runtime::Current()->IsActiveTransaction()) {
SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_), cause);
} else {
SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_), cause);
}
}
void Throwable::SetStackState(Object* state) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
CHECK(state != nullptr);
if (Runtime::Current()->IsActiveTransaction()) {
SetFieldObjectVolatile<true>(OFFSET_OF_OBJECT_MEMBER(Throwable, stack_state_), state);
} else {
SetFieldObjectVolatile<false>(OFFSET_OF_OBJECT_MEMBER(Throwable, stack_state_), state);
}
}
bool Throwable::IsCheckedException() {
if (InstanceOf(WellKnownClasses::ToClass(WellKnownClasses::java_lang_Error))) {
return false;
}
return !InstanceOf(WellKnownClasses::ToClass(WellKnownClasses::java_lang_RuntimeException));
}
int32_t Throwable::GetStackDepth() {
Object* stack_state = GetStackState();
if (stack_state == nullptr || !stack_state->IsObjectArray()) return -1;
ObjectArray<Object>* method_trace = down_cast<ObjectArray<Object>*>(stack_state);
return method_trace->GetLength() - 1;
}
std::string Throwable::Dump() {
std::string result(PrettyTypeOf(this));
result += ": ";
String* msg = GetDetailMessage();
if (msg != nullptr) {
result += msg->ToModifiedUtf8();
}
result += "\n";
Object* stack_state = GetStackState();
// check stack state isn't missing or corrupt
if (stack_state != nullptr && stack_state->IsObjectArray()) {
// Decode the internal stack trace into the depth and method trace
ObjectArray<Object>* method_trace = down_cast<ObjectArray<Object>*>(stack_state);
int32_t depth = method_trace->GetLength() - 1;
IntArray* pc_trace = down_cast<IntArray*>(method_trace->Get(depth));
if (depth == 0) {
result += "(Throwable with empty stack trace)";
} else {
for (int32_t i = 0; i < depth; ++i) {
mirror::ArtMethod* method = down_cast<ArtMethod*>(method_trace->Get(i));
uint32_t dex_pc = pc_trace->Get(i);
int32_t line_number = method->GetLineNumFromDexPC(dex_pc);
const char* source_file = method->GetDeclaringClassSourceFile();
result += StringPrintf(" at %s (%s:%d)\n", PrettyMethod(method, true).c_str(),
source_file, line_number);
}
}
} else {
Object* stack_trace = GetStackTrace();
if (stack_trace != nullptr && stack_trace->IsObjectArray()) {
CHECK_EQ(stack_trace->GetClass()->GetComponentType(),
StackTraceElement::GetStackTraceElement());
ObjectArray<StackTraceElement>* ste_array =
down_cast<ObjectArray<StackTraceElement>*>(stack_trace);
if (ste_array->GetLength() == 0) {
result += "(Throwable with empty stack trace)";
} else {
for (int32_t i = 0; i < ste_array->GetLength(); ++i) {
StackTraceElement* ste = ste_array->Get(i);
result += StringPrintf(" at %s (%s:%d)\n",
ste->GetMethodName()->ToModifiedUtf8().c_str(),
ste->GetFileName()->ToModifiedUtf8().c_str(),
ste->GetLineNumber());
}
}
} else {
result += "(Throwable with no stack trace)";
}
}
Throwable* cause = GetFieldObject<Throwable>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_));
if (cause != nullptr && cause != this) { // Constructor makes cause == this by default.
result += "Caused by: ";
result += cause->Dump();
}
return result;
}
void Throwable::SetClass(Class* java_lang_Throwable) {
CHECK(java_lang_Throwable_.IsNull());
CHECK(java_lang_Throwable != nullptr);
java_lang_Throwable_ = GcRoot<Class>(java_lang_Throwable);
}
void Throwable::ResetClass() {
CHECK(!java_lang_Throwable_.IsNull());
java_lang_Throwable_ = GcRoot<Class>(nullptr);
}
void Throwable::VisitRoots(RootVisitor* visitor) {
java_lang_Throwable_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
}
} // namespace mirror
} // namespace art
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