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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 "android-base/stringprintf.h"
#include "art_method-inl.h"
#include "base/enums.h"
#include "base/utils.h"
#include "class-inl.h"
#include "class_root.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.h"
namespace art {
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 (InstanceOf(WellKnownClasses::ToClass(WellKnownClasses::java_lang_Error))) {
return false;
}
return !InstanceOf(WellKnownClasses::ToClass(WellKnownClasses::java_lang_RuntimeException));
}
bool Throwable::IsError() {
return InstanceOf(WellKnownClasses::ToClass(WellKnownClasses::java_lang_Error));
}
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_));
}
} // namespace mirror
} // namespace art
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