blob: 35932e0b892f4df2240341d6a113452a5ab663ff [file] [log] [blame]
/*
* Copyright (C) 2008 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 "java_lang_VMClassLoader.h"
#include "class_linker.h"
#include "jni_internal.h"
#include "mirror/class_loader.h"
#include "mirror/object-inl.h"
#include "scoped_fast_native_object_access.h"
#include "ScopedUtfChars.h"
#include "zip_archive.h"
namespace art {
static jclass VMClassLoader_findLoadedClass(JNIEnv* env, jclass, jobject javaLoader,
jstring javaName) {
ScopedFastNativeObjectAccess soa(env);
mirror::ClassLoader* loader = soa.Decode<mirror::ClassLoader*>(javaLoader);
ScopedUtfChars name(env, javaName);
if (name.c_str() == nullptr) {
return nullptr;
}
ClassLinker* cl = Runtime::Current()->GetClassLinker();
std::string descriptor(DotToDescriptor(name.c_str()));
const size_t descriptor_hash = ComputeModifiedUtf8Hash(descriptor.c_str());
mirror::Class* c = cl->LookupClass(soa.Self(), descriptor.c_str(), descriptor_hash, loader);
if (c != nullptr && c->IsResolved()) {
return soa.AddLocalReference<jclass>(c);
}
if (loader != nullptr) {
// Try the common case.
StackHandleScope<1> hs(soa.Self());
c = cl->FindClassInPathClassLoader(soa, soa.Self(), descriptor.c_str(), descriptor_hash,
hs.NewHandle(loader));
if (c != nullptr) {
return soa.AddLocalReference<jclass>(c);
}
}
// Class wasn't resolved so it may be erroneous or not yet ready, force the caller to go into
// the regular loadClass code.
return nullptr;
}
static jint VMClassLoader_getBootClassPathSize(JNIEnv*, jclass) {
return Runtime::Current()->GetClassLinker()->GetBootClassPath().size();
}
/*
* Returns a string URL for a resource with the specified 'javaName' in
* entry 'index' of the boot class path.
*
* We return a newly-allocated String in the following form:
*
* jar:file://path!/name
*
* Where "path" is the bootstrap class path entry and "name" is the string
* passed into this method. "path" needs to be an absolute path (starting
* with '/'); if it's not we'd need to make it absolute as part of forming
* the URL string.
*/
static jstring VMClassLoader_getBootClassPathResource(JNIEnv* env, jclass, jstring javaName,
jint index) {
ScopedUtfChars name(env, javaName);
if (name.c_str() == nullptr) {
return nullptr;
}
const std::vector<const DexFile*>& path =
Runtime::Current()->GetClassLinker()->GetBootClassPath();
if (index < 0 || size_t(index) >= path.size()) {
return nullptr;
}
const DexFile* dex_file = path[index];
// For multidex locations, e.g., x.jar:classes2.dex, we want to look into x.jar.
const std::string& location(dex_file->GetBaseLocation());
std::string error_msg;
std::unique_ptr<ZipArchive> zip_archive(ZipArchive::Open(location.c_str(), &error_msg));
if (zip_archive.get() == nullptr) {
LOG(WARNING) << "Failed to open zip archive '" << location << "': " << error_msg;
return nullptr;
}
std::unique_ptr<ZipEntry> zip_entry(zip_archive->Find(name.c_str(), &error_msg));
if (zip_entry.get() == nullptr) {
return nullptr;
}
std::string url;
StringAppendF(&url, "jar:file://%s!/%s", location.c_str(), name.c_str());
return env->NewStringUTF(url.c_str());
}
static JNINativeMethod gMethods[] = {
NATIVE_METHOD(VMClassLoader, findLoadedClass, "!(Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/Class;"),
NATIVE_METHOD(VMClassLoader, getBootClassPathResource, "(Ljava/lang/String;I)Ljava/lang/String;"),
NATIVE_METHOD(VMClassLoader, getBootClassPathSize, "!()I"),
};
void register_java_lang_VMClassLoader(JNIEnv* env) {
REGISTER_NATIVE_METHODS("java/lang/VMClassLoader");
}
} // namespace art