/*
* 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 "android-base/stringprintf.h"
#include "art_method-inl.h"
#include "base/pointer_size.h"
#include "base/utils.h"
#include "class-inl.h"
#include "class_root-inl.h"
#include "dex/dex_file-inl.h"
#include "gc/accounting/card_table-inl.h"
#include "obj_ptr-inl.h"
#include "object-inl.h"
#include "object_array-inl.h"
#include "object_array.h"
#include "stack_trace_element-inl.h"
#include "string.h"
#include "well_known_classes-inl.h"
namespace art HIDDEN {
namespace mirror {
using android::base::StringPrintf;
void Throwable::SetDetailMessage(ObjPtr<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(ObjPtr<Throwable> cause) {
CHECK(cause != nullptr);
CHECK(cause != this );
ObjPtr<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(ObjPtr<Object> state) REQUIRES_SHARED(Locks::mutator_lock_) {
CHECK(state != nullptr);
if (Runtime::Current()->IsActiveTransaction()) {
SetFieldObjectVolatile<true >(OFFSET_OF_OBJECT_MEMBER(Throwable, backtrace_), state);
} else {
SetFieldObjectVolatile<false >(OFFSET_OF_OBJECT_MEMBER(Throwable, backtrace_), state);
}
}
bool Throwable::IsCheckedException() {
if (IsError()) {
return false ;
}
return !InstanceOf(WellKnownClasses::java_lang_RuntimeException.Get());
}
bool Throwable::IsError() {
return InstanceOf(WellKnownClasses::java_lang_Error.Get());
}
int32_t Throwable::GetStackDepth() {
const ObjPtr<Object> stack_state = GetStackState();
if (stack_state == nullptr || !stack_state->IsObjectArray()) {
return -1 ;
}
const ObjPtr<mirror::ObjectArray<Object>> trace = stack_state->AsObjectArray<Object>();
const int32_t array_len = trace->GetLength();
DCHECK_GT(array_len, 0 );
// See method BuildInternalStackTraceVisitor::Init for the format.
return array_len - 1 ;
}
std::string Throwable::Dump() {
std::string result(PrettyTypeOf());
result += ": " ;
ObjPtr<String> msg = GetDetailMessage();
if (msg != nullptr) {
result += msg->ToModifiedUtf8();
}
result += "\n" ;
ObjPtr<Object> stack_state = GetStackState();
// check stack state isn't missing or corrupt
if (stack_state != nullptr && stack_state->IsObjectArray()) {
ObjPtr<ObjectArray<Object>> object_array = stack_state->AsObjectArray<Object>();
// Decode the internal stack trace into the depth and method trace
// See method BuildInternalStackTraceVisitor::Init for the format.
DCHECK_GT(object_array->GetLength(), 0 );
ObjPtr<Object> methods_and_dex_pcs = object_array->Get(0 );
DCHECK(methods_and_dex_pcs->IsIntArray() || methods_and_dex_pcs->IsLongArray());
ObjPtr<PointerArray> method_trace = ObjPtr<PointerArray>::DownCast(methods_and_dex_pcs);
const int32_t array_len = method_trace->GetLength();
CHECK_EQ(array_len % 2 , 0 );
const auto depth = array_len / 2 ;
if (depth == 0 ) {
result += "(Throwable with empty stack trace)\n" ;
} else {
const PointerSize ptr_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize();
for (int32_t i = 0 ; i < depth; ++i) {
ArtMethod* method = method_trace->GetElementPtrSize<ArtMethod*>(i, ptr_size);
uintptr_t dex_pc = method_trace->GetElementPtrSize<uintptr_t>(i + depth, ptr_size);
int32_t line_number = method->GetLineNumFromDexPC(dex_pc);
const char * source_file = method->GetDeclaringClassSourceFile();
result += StringPrintf(" at %s (%s:%d)\n" , method->PrettyMethod(true ).c_str(),
source_file, line_number);
}
}
} else {
ObjPtr<Object> stack_trace = GetStackTrace();
if (stack_trace != nullptr && stack_trace->IsObjectArray()) {
CHECK_EQ(stack_trace->GetClass()->GetComponentType(), GetClassRoot<StackTraceElement>());
ObjPtr<ObjectArray<StackTraceElement>> ste_array =
ObjPtr<ObjectArray<StackTraceElement>>::DownCast(stack_trace);
if (ste_array->GetLength() == 0 ) {
result += "(Throwable with empty stack trace)\n" ;
} else {
for (int32_t i = 0 ; i < ste_array->GetLength(); ++i) {
ObjPtr<StackTraceElement> ste = ste_array->Get(i);
DCHECK(ste != nullptr);
ObjPtr<String> method_name = ste->GetMethodName();
ObjPtr<String> file_name = ste->GetFileName();
result += StringPrintf(
" at %s (%s:%d)\n" ,
method_name != nullptr ? method_name->ToModifiedUtf8().c_str() : "<unknown method>" ,
file_name != nullptr ? file_name->ToModifiedUtf8().c_str() : "(Unknown Source)" ,
ste->GetLineNumber());
}
}
} else {
result += "(Throwable with no stack trace)\n" ;
}
}
ObjPtr<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;
}
ObjPtr<Object> Throwable::GetStackState() {
return GetFieldObjectVolatile<Object>(OFFSET_OF_OBJECT_MEMBER(Throwable, backtrace_));
}
ObjPtr<Object> Throwable::GetStackTrace() {
return GetFieldObjectVolatile<Object>(OFFSET_OF_OBJECT_MEMBER(Throwable, backtrace_));
}
ObjPtr<String> Throwable::GetDetailMessage() {
return GetFieldObject<String>(OFFSET_OF_OBJECT_MEMBER(Throwable, detail_message_));
}
ObjPtr<Throwable> Throwable::GetCause() {
return GetFieldObject<Throwable>(OFFSET_OF_OBJECT_MEMBER(Throwable, cause_));
}
} // namespace mirror
} // namespace art
Messung V0.5 in Prozent C=90 H=86 G=87
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-06-29)
¤
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