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189 lines
7.7 KiB
189 lines
7.7 KiB
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <sstream>
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#include "debug_print.h"
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#include "class_linker.h"
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#include "class_table.h"
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#include "class_loader_utils.h"
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#include "dex/utf.h"
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#include "gc/heap.h"
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#include "gc/space/space-inl.h"
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#include "mirror/class.h"
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#include "mirror/class_loader-inl.h"
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#include "runtime.h"
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#include "scoped_thread_state_change-inl.h"
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#include "thread-current-inl.h"
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#include "well_known_classes.h"
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namespace art {
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std::string DescribeSpace(ObjPtr<mirror::Class> klass) {
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std::ostringstream oss;
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gc::Heap* heap = Runtime::Current()->GetHeap();
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gc::space::ContinuousSpace* cs =
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heap->FindContinuousSpaceFromObject(klass, /* fail_ok= */ true);
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if (cs != nullptr) {
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if (cs->IsImageSpace()) {
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gc::space::ImageSpace* ispace = cs->AsImageSpace();
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oss << "image;" << ispace->GetName() << ";"
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// If the file name is the same as the name, output "+" instead to shorten the output.
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<< (ispace->GetImageFilename() == cs->GetName() ? "+" : ispace->GetImageFilename())
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<< ";" << static_cast<const void*>(ispace->Begin());
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} else {
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oss << "continuous;" << cs->GetName();
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}
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} else {
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gc::space::DiscontinuousSpace* ds =
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heap->FindDiscontinuousSpaceFromObject(klass, /* fail_ok= */ true);
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if (ds != nullptr) {
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oss << "discontinuous;" << ds->GetName();
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} else {
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oss << "invalid";
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}
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}
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return oss.str();
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}
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std::string DescribeLoaders(ObjPtr<mirror::ClassLoader> loader, const char* class_descriptor) {
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std::ostringstream oss;
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uint32_t hash = ComputeModifiedUtf8Hash(class_descriptor);
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ObjPtr<mirror::Class> path_class_loader =
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WellKnownClasses::ToClass(WellKnownClasses::dalvik_system_PathClassLoader);
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ObjPtr<mirror::Class> dex_class_loader =
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WellKnownClasses::ToClass(WellKnownClasses::dalvik_system_DexClassLoader);
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ObjPtr<mirror::Class> delegate_last_class_loader =
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WellKnownClasses::ToClass(WellKnownClasses::dalvik_system_DelegateLastClassLoader);
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// Print the class loader chain.
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bool found_class = false;
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const char* loader_separator = "";
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if (loader == nullptr) {
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oss << "BootClassLoader"; // This would be unexpected.
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}
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for (; loader != nullptr; loader = loader->GetParent()) {
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ClassTable* table = Runtime::Current()->GetClassLinker()->ClassTableForClassLoader(loader);
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oss << loader_separator << loader->GetClass()->PrettyDescriptor()
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<< "/" << static_cast<const void*>(table);
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loader_separator = ";";
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// If we didn't find the class yet, try to find it in the current class loader.
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if (!found_class) {
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ObjPtr<mirror::Class> klass =
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(table != nullptr) ? table->Lookup(class_descriptor, hash) : nullptr;
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if (klass != nullptr) {
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found_class = true;
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oss << "[hit:" << DescribeSpace(klass) << "]";
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}
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}
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// For PathClassLoader, DexClassLoader or DelegateLastClassLoader
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// also dump the dex file locations.
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if (loader->GetClass() == path_class_loader ||
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loader->GetClass() == dex_class_loader ||
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loader->GetClass() == delegate_last_class_loader) {
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oss << "(";
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ScopedObjectAccessUnchecked soa(Thread::Current());
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StackHandleScope<1> hs(soa.Self());
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Handle<mirror::ClassLoader> handle(hs.NewHandle(loader));
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const char* path_separator = "";
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const DexFile* base_dex_file = nullptr;
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VisitClassLoaderDexFiles(
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soa,
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handle,
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[&](const DexFile* dex_file) {
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oss << path_separator;
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path_separator = ":";
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if (base_dex_file != nullptr &&
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dex_file->GetLocation().length() > base_dex_file->GetLocation().length() &&
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dex_file->GetLocation().compare(0u,
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base_dex_file->GetLocation().length(),
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base_dex_file->GetLocation()) == 0) {
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// Replace the base location with "+" to shorten the output.
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oss << "+" << dex_file->GetLocation().substr(base_dex_file->GetLocation().length());
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} else {
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oss << dex_file->GetLocation();
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base_dex_file = dex_file;
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}
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oss << "/" << static_cast<const void*>(dex_file);
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return true; // Continue with the next DexFile.
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});
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oss << ")";
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}
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}
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return oss.str();
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}
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void DumpB77342775DebugData(ObjPtr<mirror::Class> target_class, ObjPtr<mirror::Class> src_class) {
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std::string target_descriptor_storage;
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const char* target_descriptor = target_class->GetDescriptor(&target_descriptor_storage);
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const char kCheckedPrefix[] = "Lorg/apache/http/";
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// Avoid spam for other packages. (That spam would break some ART run-tests for example.)
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if (strncmp(target_descriptor, kCheckedPrefix, sizeof(kCheckedPrefix) - 1) != 0) {
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return;
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}
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auto matcher = [target_descriptor, target_class](ObjPtr<mirror::Class> klass)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (klass->DescriptorEquals(target_descriptor)) {
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LOG(ERROR) << " descriptor match in "
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<< DescribeLoaders(klass->GetClassLoader(), target_descriptor)
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<< " match? " << std::boolalpha << (klass == target_class);
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}
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};
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std::string source_descriptor_storage;
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const char* source_descriptor = src_class->GetDescriptor(&source_descriptor_storage);
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LOG(ERROR) << "Maybe bug 77342775, looking for " << target_descriptor
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<< " " << target_class.Ptr() << "[" << DescribeSpace(target_class) << "]"
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<< " defined in " << target_class->GetDexFile().GetLocation()
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<< "/" << static_cast<const void*>(&target_class->GetDexFile())
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<< "\n with loader: " << DescribeLoaders(target_class->GetClassLoader(), target_descriptor);
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if (target_class->IsInterface()) {
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ObjPtr<mirror::IfTable> iftable = src_class->GetIfTable();
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CHECK(iftable != nullptr);
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size_t ifcount = iftable->Count();
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LOG(ERROR) << " in interface table for " << source_descriptor
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<< " " << src_class.Ptr() << "[" << DescribeSpace(src_class) << "]"
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<< " defined in " << src_class->GetDexFile().GetLocation()
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<< "/" << static_cast<const void*>(&src_class->GetDexFile())
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<< " ifcount=" << ifcount
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<< "\n with loader " << DescribeLoaders(src_class->GetClassLoader(), source_descriptor);
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for (size_t i = 0; i != ifcount; ++i) {
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ObjPtr<mirror::Class> iface = iftable->GetInterface(i);
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CHECK(iface != nullptr);
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LOG(ERROR) << " iface #" << i << ": " << iface->PrettyDescriptor();
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matcher(iface);
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}
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} else {
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LOG(ERROR) << " in superclass chain for " << source_descriptor
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<< " " << src_class.Ptr() << "[" << DescribeSpace(src_class) << "]"
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<< " defined in " << src_class->GetDexFile().GetLocation()
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<< "/" << static_cast<const void*>(&src_class->GetDexFile())
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<< "\n with loader " << DescribeLoaders(src_class->GetClassLoader(), source_descriptor);
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for (ObjPtr<mirror::Class> klass = src_class;
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klass != nullptr;
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klass = klass->GetSuperClass()) {
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LOG(ERROR) << " - " << klass->PrettyDescriptor();
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matcher(klass);
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}
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}
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}
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} // namespace art
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