blob: cb334b569f50ce78d698f34ce846a0c7de2cab20 [file] [log] [blame]
/*
* Copyright (C) 2018 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 <sstream>
#include "debug_print.h"
#include "class_linker.h"
#include "class_table.h"
#include "class_loader_utils.h"
#include "dex/utf.h"
#include "gc/heap.h"
#include "gc/space/space-inl.h"
#include "mirror/class.h"
#include "mirror/class_loader.h"
#include "runtime.h"
#include "scoped_thread_state_change-inl.h"
#include "thread-current-inl.h"
#include "well_known_classes.h"
namespace art {
std::string DescribeSpace(ObjPtr<mirror::Class> klass) {
std::ostringstream oss;
gc::Heap* heap = Runtime::Current()->GetHeap();
gc::space::ContinuousSpace* cs =
heap->FindContinuousSpaceFromObject(klass, /* fail_ok */ true);
if (cs != nullptr) {
if (cs->IsImageSpace()) {
gc::space::ImageSpace* ispace = cs->AsImageSpace();
oss << "image;" << ispace->GetName() << ";"
// If the file name is the same as the name, output "+" instead to shorten the output.
<< (ispace->GetImageFilename() == cs->GetName() ? "+" : ispace->GetImageFilename())
<< ";" << static_cast<const void*>(ispace->Begin());
} else {
oss << "continuous;" << cs->GetName();
}
} else {
gc::space::DiscontinuousSpace* ds =
heap->FindDiscontinuousSpaceFromObject(klass, /* fail_ok */ true);
if (ds != nullptr) {
oss << "discontinuous;" << ds->GetName();
} else {
oss << "invalid";
}
}
return oss.str();
}
std::string DescribeLoaders(ObjPtr<mirror::ClassLoader> loader, const char* class_descriptor) {
std::ostringstream oss;
uint32_t hash = ComputeModifiedUtf8Hash(class_descriptor);
ObjPtr<mirror::Class> path_class_loader =
WellKnownClasses::ToClass(WellKnownClasses::dalvik_system_PathClassLoader);
ObjPtr<mirror::Class> dex_class_loader =
WellKnownClasses::ToClass(WellKnownClasses::dalvik_system_DexClassLoader);
ObjPtr<mirror::Class> delegate_last_class_loader =
WellKnownClasses::ToClass(WellKnownClasses::dalvik_system_DelegateLastClassLoader);
// Print the class loader chain.
bool found_class = false;
const char* loader_separator = "";
if (loader == nullptr) {
oss << "BootClassLoader"; // This would be unexpected.
}
for (; loader != nullptr; loader = loader->GetParent()) {
ClassTable* table = Runtime::Current()->GetClassLinker()->ClassTableForClassLoader(loader);
oss << loader_separator << loader->GetClass()->PrettyDescriptor()
<< "/" << static_cast<const void*>(table);
loader_separator = ";";
// If we didn't find the class yet, try to find it in the current class loader.
if (!found_class) {
ObjPtr<mirror::Class> klass =
(table != nullptr) ? table->Lookup(class_descriptor, hash) : nullptr;
if (klass != nullptr) {
found_class = true;
oss << "[hit:" << DescribeSpace(klass) << "]";
}
}
// For PathClassLoader, DexClassLoader or DelegateLastClassLoader
// also dump the dex file locations.
if (loader->GetClass() == path_class_loader ||
loader->GetClass() == dex_class_loader ||
loader->GetClass() == delegate_last_class_loader) {
oss << "(";
ScopedObjectAccessUnchecked soa(Thread::Current());
StackHandleScope<1> hs(soa.Self());
Handle<mirror::ClassLoader> handle(hs.NewHandle(loader));
const char* path_separator = "";
const DexFile* base_dex_file = nullptr;
VisitClassLoaderDexFiles(
soa,
handle,
[&](const DexFile* dex_file) {
oss << path_separator;
path_separator = ":";
if (base_dex_file != nullptr &&
dex_file->GetLocation().length() > base_dex_file->GetLocation().length() &&
dex_file->GetLocation().compare(0u,
base_dex_file->GetLocation().length(),
base_dex_file->GetLocation()) == 0) {
// Replace the base location with "+" to shorten the output.
oss << "+" << dex_file->GetLocation().substr(base_dex_file->GetLocation().length());
} else {
oss << dex_file->GetLocation();
base_dex_file = dex_file;
}
oss << "/" << static_cast<const void*>(dex_file);
return true; // Continue with the next DexFile.
});
oss << ")";
}
}
return oss.str();
}
void DumpB77342775DebugData(ObjPtr<mirror::Class> target_class, ObjPtr<mirror::Class> src_class) {
std::string target_descriptor_storage;
const char* target_descriptor = target_class->GetDescriptor(&target_descriptor_storage);
const char kCheckedPrefix[] = "Lorg/apache/http/";
// Avoid spam for other packages. (That spam would break some ART run-tests for example.)
if (strncmp(target_descriptor, kCheckedPrefix, sizeof(kCheckedPrefix) - 1) != 0) {
return;
}
auto matcher = [target_descriptor, target_class](ObjPtr<mirror::Class> klass)
REQUIRES_SHARED(Locks::mutator_lock_) {
if (klass->DescriptorEquals(target_descriptor)) {
LOG(ERROR) << " descriptor match in "
<< DescribeLoaders(klass->GetClassLoader(), target_descriptor)
<< " match? " << std::boolalpha << (klass == target_class);
}
};
std::string source_descriptor_storage;
const char* source_descriptor = src_class->GetDescriptor(&source_descriptor_storage);
LOG(ERROR) << "Maybe bug 77342775, looking for " << target_descriptor
<< " " << target_class.Ptr() << "[" << DescribeSpace(target_class) << "]"
<< " defined in " << target_class->GetDexFile().GetLocation()
<< "/" << static_cast<const void*>(&target_class->GetDexFile())
<< "\n with loader: " << DescribeLoaders(target_class->GetClassLoader(), target_descriptor);
if (target_class->IsInterface()) {
ObjPtr<mirror::IfTable> iftable = src_class->GetIfTable();
CHECK(iftable != nullptr);
size_t ifcount = iftable->Count();
LOG(ERROR) << " in interface table for " << source_descriptor
<< " " << src_class.Ptr() << "[" << DescribeSpace(src_class) << "]"
<< " defined in " << src_class->GetDexFile().GetLocation()
<< "/" << static_cast<const void*>(&src_class->GetDexFile())
<< " ifcount=" << ifcount
<< "\n with loader " << DescribeLoaders(src_class->GetClassLoader(), source_descriptor);
for (size_t i = 0; i != ifcount; ++i) {
ObjPtr<mirror::Class> iface = iftable->GetInterface(i);
CHECK(iface != nullptr);
LOG(ERROR) << " iface #" << i << ": " << iface->PrettyDescriptor();
matcher(iface);
}
} else {
LOG(ERROR) << " in superclass chain for " << source_descriptor
<< " " << src_class.Ptr() << "[" << DescribeSpace(src_class) << "]"
<< " defined in " << src_class->GetDexFile().GetLocation()
<< "/" << static_cast<const void*>(&src_class->GetDexFile())
<< "\n with loader " << DescribeLoaders(src_class->GetClassLoader(), source_descriptor);
for (ObjPtr<mirror::Class> klass = src_class;
klass != nullptr;
klass = klass->GetSuperClass()) {
LOG(ERROR) << " - " << klass->PrettyDescriptor();
matcher(klass);
}
}
}
} // namespace art