761 lines
34 KiB
C++
761 lines
34 KiB
C++
/*
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* Copyright (C) 2012 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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#ifndef ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_
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#define ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_
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#include "entrypoint_utils.h"
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#include <sstream>
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#include "art_field-inl.h"
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#include "art_method-inl.h"
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#include "base/enums.h"
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#include "base/sdk_version.h"
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#include "class_linker-inl.h"
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#include "common_throws.h"
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#include "dex/dex_file.h"
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#include "dex/invoke_type.h"
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#include "entrypoints/quick/callee_save_frame.h"
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#include "handle_scope-inl.h"
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#include "imt_conflict_table.h"
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#include "imtable-inl.h"
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#include "indirect_reference_table.h"
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#include "jni/jni_internal.h"
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#include "mirror/array-alloc-inl.h"
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#include "mirror/class-alloc-inl.h"
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#include "mirror/class-inl.h"
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#include "mirror/object-inl.h"
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#include "mirror/throwable.h"
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#include "nth_caller_visitor.h"
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#include "oat_file.h"
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#include "reflective_handle_scope-inl.h"
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#include "runtime.h"
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#include "stack_map.h"
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#include "thread.h"
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#include "well_known_classes.h"
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namespace art {
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inline std::string GetResolvedMethodErrorString(ClassLinker* class_linker,
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ArtMethod* inlined_method,
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ArtMethod* parent_method,
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ArtMethod* outer_method,
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ObjPtr<mirror::DexCache> dex_cache,
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MethodInfo method_info)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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const uint32_t method_index = method_info.GetMethodIndex();
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std::stringstream error_ss;
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std::string separator = "";
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error_ss << "BCP vector {";
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for (const DexFile* df : class_linker->GetBootClassPath()) {
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error_ss << separator << df << "(" << df->GetLocation() << ")";
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separator = ", ";
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}
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error_ss << "}. oat_dex_files vector: {";
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separator = "";
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for (const OatDexFile* odf_value :
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parent_method->GetDexFile()->GetOatDexFile()->GetOatFile()->GetOatDexFiles()) {
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error_ss << separator << odf_value << "(" << odf_value->GetDexFileLocation() << ")";
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separator = ", ";
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}
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error_ss << "}. ";
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if (inlined_method != nullptr) {
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error_ss << "Inlined method: " << inlined_method->PrettyMethod() << " ("
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<< inlined_method->GetDexFile()->GetLocation() << "/"
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<< static_cast<const void*>(inlined_method->GetDexFile()) << "). ";
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} else if (dex_cache != nullptr) {
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error_ss << "Could not find an inlined method from an .oat file, using dex_cache to print the "
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"inlined method: "
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<< dex_cache->GetDexFile()->PrettyMethod(method_index) << " ("
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<< dex_cache->GetDexFile()->GetLocation() << "/"
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<< static_cast<const void*>(dex_cache->GetDexFile()) << "). ";
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} else {
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error_ss << "Both inlined_method and dex_cache are null. This means that we had an OOB access "
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<< "to either bcp_dex_files or oat_dex_files. ";
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}
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error_ss << "The outer method is: " << parent_method->PrettyMethod() << " ("
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<< parent_method->GetDexFile()->GetLocation() << "/"
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<< static_cast<const void*>(parent_method->GetDexFile())
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<< "). The outermost method in the chain is: " << outer_method->PrettyMethod() << " ("
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<< outer_method->GetDexFile()->GetLocation() << "/"
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<< static_cast<const void*>(outer_method->GetDexFile())
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<< "). MethodInfo: method_index=" << std::dec << method_index
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<< ", is_in_bootclasspath=" << std::boolalpha
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<< (method_info.GetDexFileIndexKind() == MethodInfo::kKindBCP) << std::noboolalpha
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<< ", dex_file_index=" << std::dec << method_info.GetDexFileIndex() << ".";
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return error_ss.str();
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}
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inline ArtMethod* GetResolvedMethod(ArtMethod* outer_method,
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const CodeInfo& code_info,
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const BitTableRange<InlineInfo>& inline_infos)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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DCHECK(!outer_method->IsObsolete());
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// This method is being used by artQuickResolutionTrampoline, before it sets up
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// the passed parameters in a GC friendly way. Therefore we must never be
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// suspended while executing it.
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ScopedAssertNoThreadSuspension sants(__FUNCTION__);
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{
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InlineInfo inline_info = inline_infos.back();
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if (inline_info.EncodesArtMethod()) {
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return inline_info.GetArtMethod();
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}
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uint32_t method_index = code_info.GetMethodIndexOf(inline_info);
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if (inline_info.GetDexPc() == static_cast<uint32_t>(-1)) {
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// "charAt" special case. It is the only non-leaf method we inline across dex files.
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ArtMethod* inlined_method = jni::DecodeArtMethod(WellKnownClasses::java_lang_String_charAt);
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DCHECK_EQ(inlined_method->GetDexMethodIndex(), method_index);
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return inlined_method;
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}
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}
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// Find which method did the call in the inlining hierarchy.
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ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
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ArtMethod* method = outer_method;
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for (InlineInfo inline_info : inline_infos) {
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DCHECK(!inline_info.EncodesArtMethod());
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DCHECK_NE(inline_info.GetDexPc(), static_cast<uint32_t>(-1));
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MethodInfo method_info = code_info.GetMethodInfoOf(inline_info);
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uint32_t method_index = method_info.GetMethodIndex();
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const uint32_t dex_file_index = method_info.GetDexFileIndex();
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ArtMethod* inlined_method = nullptr;
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ObjPtr<mirror::DexCache> dex_cache = nullptr;
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if (method_info.HasDexFileIndex()) {
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if (method_info.GetDexFileIndexKind() == MethodInfo::kKindBCP) {
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ArrayRef<const DexFile* const> bcp_dex_files(class_linker->GetBootClassPath());
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DCHECK_LT(dex_file_index, bcp_dex_files.size())
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<< "OOB access to bcp_dex_files. Dumping info: "
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<< GetResolvedMethodErrorString(
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class_linker, inlined_method, method, outer_method, dex_cache, method_info);
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const DexFile* dex_file = bcp_dex_files[dex_file_index];
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DCHECK_NE(dex_file, nullptr);
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dex_cache = class_linker->FindDexCache(Thread::Current(), *dex_file);
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} else {
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ArrayRef<const OatDexFile* const> oat_dex_files(
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outer_method->GetDexFile()->GetOatDexFile()->GetOatFile()->GetOatDexFiles());
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DCHECK_LT(dex_file_index, oat_dex_files.size())
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<< "OOB access to oat_dex_files. Dumping info: "
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<< GetResolvedMethodErrorString(
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class_linker, inlined_method, method, outer_method, dex_cache, method_info);
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const OatDexFile* odf = oat_dex_files[dex_file_index];
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DCHECK_NE(odf, nullptr);
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dex_cache = class_linker->FindDexCache(Thread::Current(), *odf);
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}
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} else {
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dex_cache = outer_method->GetDexCache();
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}
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inlined_method =
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class_linker->LookupResolvedMethod(method_index, dex_cache, dex_cache->GetClassLoader());
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if (UNLIKELY(inlined_method == nullptr)) {
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LOG(FATAL) << GetResolvedMethodErrorString(
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class_linker, inlined_method, method, outer_method, dex_cache, method_info);
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UNREACHABLE();
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}
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DCHECK(!inlined_method->IsRuntimeMethod());
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DCHECK_EQ(inlined_method->GetDexFile() == outer_method->GetDexFile(),
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dex_file_index == MethodInfo::kSameDexFile)
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<< GetResolvedMethodErrorString(
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class_linker, inlined_method, method, outer_method, dex_cache, method_info);
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method = inlined_method;
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}
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return method;
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}
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ALWAYS_INLINE
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inline ObjPtr<mirror::Class> CheckClassInitializedForObjectAlloc(ObjPtr<mirror::Class> klass,
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Thread* self,
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bool* slow_path)
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REQUIRES_SHARED(Locks::mutator_lock_)
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REQUIRES(!Roles::uninterruptible_) {
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if (UNLIKELY(!klass->IsVisiblyInitialized())) {
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StackHandleScope<1> hs(self);
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Handle<mirror::Class> h_class(hs.NewHandle(klass));
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// EnsureInitialized (the class initializer) might cause a GC.
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// may cause us to suspend meaning that another thread may try to
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// change the allocator while we are stuck in the entrypoints of
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// an old allocator. Also, the class initialization may fail. To
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// handle these cases we mark the slow path boolean as true so
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// that the caller knows to check the allocator type to see if it
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// has changed and to null-check the return value in case the
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// initialization fails.
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*slow_path = true;
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if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, h_class, true, true)) {
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DCHECK(self->IsExceptionPending());
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return nullptr; // Failure
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} else {
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DCHECK(!self->IsExceptionPending());
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}
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return h_class.Get();
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}
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return klass;
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}
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ALWAYS_INLINE inline ObjPtr<mirror::Class> CheckObjectAlloc(ObjPtr<mirror::Class> klass,
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Thread* self,
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bool* slow_path)
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REQUIRES_SHARED(Locks::mutator_lock_)
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REQUIRES(!Roles::uninterruptible_) {
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if (UNLIKELY(!klass->IsInstantiable())) {
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self->ThrowNewException("Ljava/lang/InstantiationError;", klass->PrettyDescriptor().c_str());
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*slow_path = true;
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return nullptr; // Failure
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}
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if (UNLIKELY(klass->IsClassClass())) {
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ThrowIllegalAccessError(nullptr, "Class %s is inaccessible",
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klass->PrettyDescriptor().c_str());
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*slow_path = true;
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return nullptr; // Failure
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}
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return CheckClassInitializedForObjectAlloc(klass, self, slow_path);
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}
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// Allocate an instance of klass. Throws InstantationError if klass is not instantiable,
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// or IllegalAccessError if klass is j.l.Class. Performs a clinit check too.
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template <bool kInstrumented>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Object> AllocObjectFromCode(ObjPtr<mirror::Class> klass,
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Thread* self,
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gc::AllocatorType allocator_type) {
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bool slow_path = false;
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klass = CheckObjectAlloc(klass, self, &slow_path);
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if (UNLIKELY(slow_path)) {
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if (klass == nullptr) {
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return nullptr;
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}
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// CheckObjectAlloc can cause thread suspension which means we may now be instrumented.
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return klass->Alloc</*kInstrumented=*/true>(
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self,
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Runtime::Current()->GetHeap()->GetCurrentAllocator());
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}
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DCHECK(klass != nullptr);
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return klass->Alloc<kInstrumented>(self, allocator_type);
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}
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// Given the context of a calling Method and a resolved class, create an instance.
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template <bool kInstrumented>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Object> AllocObjectFromCodeResolved(ObjPtr<mirror::Class> klass,
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Thread* self,
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gc::AllocatorType allocator_type) {
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DCHECK(klass != nullptr);
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bool slow_path = false;
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klass = CheckClassInitializedForObjectAlloc(klass, self, &slow_path);
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if (UNLIKELY(slow_path)) {
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if (klass == nullptr) {
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return nullptr;
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}
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gc::Heap* heap = Runtime::Current()->GetHeap();
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// Pass in kNoAddFinalizer since the object cannot be finalizable.
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// CheckClassInitializedForObjectAlloc can cause thread suspension which means we may now be
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// instrumented.
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return klass->Alloc</*kInstrumented=*/true, mirror::Class::AddFinalizer::kNoAddFinalizer>(
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self, heap->GetCurrentAllocator());
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}
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// Pass in kNoAddFinalizer since the object cannot be finalizable.
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return klass->Alloc<kInstrumented,
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mirror::Class::AddFinalizer::kNoAddFinalizer>(self, allocator_type);
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}
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// Given the context of a calling Method and an initialized class, create an instance.
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template <bool kInstrumented>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Object> AllocObjectFromCodeInitialized(ObjPtr<mirror::Class> klass,
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Thread* self,
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gc::AllocatorType allocator_type) {
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DCHECK(klass != nullptr);
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// Pass in kNoAddFinalizer since the object cannot be finalizable.
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return klass->Alloc<kInstrumented,
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mirror::Class::AddFinalizer::kNoAddFinalizer>(self, allocator_type);
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}
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template <bool kAccessCheck>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Class> CheckArrayAlloc(dex::TypeIndex type_idx,
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int32_t component_count,
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ArtMethod* method,
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bool* slow_path) {
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if (UNLIKELY(component_count < 0)) {
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ThrowNegativeArraySizeException(component_count);
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*slow_path = true;
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return nullptr; // Failure
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}
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ObjPtr<mirror::Class> klass = method->GetDexCache()->GetResolvedType(type_idx);
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if (UNLIKELY(klass == nullptr)) { // Not in dex cache so try to resolve
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ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
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klass = class_linker->ResolveType(type_idx, method);
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*slow_path = true;
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if (klass == nullptr) { // Error
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DCHECK(Thread::Current()->IsExceptionPending());
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return nullptr; // Failure
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}
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CHECK(klass->IsArrayClass()) << klass->PrettyClass();
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}
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if (kAccessCheck) {
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ObjPtr<mirror::Class> referrer = method->GetDeclaringClass();
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if (UNLIKELY(!referrer->CanAccess(klass))) {
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ThrowIllegalAccessErrorClass(referrer, klass);
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*slow_path = true;
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return nullptr; // Failure
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}
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}
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return klass;
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}
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// Given the context of a calling Method, use its DexCache to resolve a type to an array Class. If
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// it cannot be resolved, throw an error. If it can, use it to create an array.
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// When verification/compiler hasn't been able to verify access, optionally perform an access
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// check.
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template <bool kAccessCheck, bool kInstrumented>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Array> AllocArrayFromCode(dex::TypeIndex type_idx,
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int32_t component_count,
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ArtMethod* method,
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Thread* self,
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gc::AllocatorType allocator_type) {
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bool slow_path = false;
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ObjPtr<mirror::Class> klass =
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CheckArrayAlloc<kAccessCheck>(type_idx, component_count, method, &slow_path);
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if (UNLIKELY(slow_path)) {
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if (klass == nullptr) {
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return nullptr;
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}
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gc::Heap* heap = Runtime::Current()->GetHeap();
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// CheckArrayAlloc can cause thread suspension which means we may now be instrumented.
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return mirror::Array::Alloc</*kInstrumented=*/true>(self,
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klass,
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component_count,
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klass->GetComponentSizeShift(),
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heap->GetCurrentAllocator());
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}
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return mirror::Array::Alloc<kInstrumented>(self,
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klass,
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component_count,
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klass->GetComponentSizeShift(),
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allocator_type);
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}
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template <bool kInstrumented>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Array> AllocArrayFromCodeResolved(ObjPtr<mirror::Class> klass,
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int32_t component_count,
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Thread* self,
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gc::AllocatorType allocator_type) {
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DCHECK(klass != nullptr);
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if (UNLIKELY(component_count < 0)) {
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ThrowNegativeArraySizeException(component_count);
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return nullptr; // Failure
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}
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// No need to retry a slow-path allocation as the above code won't cause a GC or thread
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// suspension.
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return mirror::Array::Alloc<kInstrumented>(self,
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klass,
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component_count,
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klass->GetComponentSizeShift(),
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allocator_type);
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}
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template<FindFieldType type, bool access_check>
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inline ArtField* FindFieldFromCode(uint32_t field_idx,
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ArtMethod* referrer,
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Thread* self,
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size_t expected_size) {
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constexpr bool is_primitive = (type & FindFieldFlags::PrimitiveBit) != 0;
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constexpr bool is_set = (type & FindFieldFlags::WriteBit) != 0;
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constexpr bool is_static = (type & FindFieldFlags::StaticBit) != 0;
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ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
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ArtField* resolved_field;
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if (access_check) {
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// Slow path: According to JLS 13.4.8, a linkage error may occur if a compile-time
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// qualifying type of a field and the resolved run-time qualifying type of a field differed
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// in their static-ness.
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//
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// In particular, don't assume the dex instruction already correctly knows if the
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// real field is static or not. The resolution must not be aware of this.
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ArtMethod* method = referrer->GetInterfaceMethodIfProxy(kRuntimePointerSize);
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StackHandleScope<2> hs(self);
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Handle<mirror::DexCache> h_dex_cache(hs.NewHandle(method->GetDexCache()));
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Handle<mirror::ClassLoader> h_class_loader(hs.NewHandle(method->GetClassLoader()));
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resolved_field = class_linker->ResolveFieldJLS(field_idx,
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h_dex_cache,
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h_class_loader);
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} else {
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// Fast path: Verifier already would've called ResolveFieldJLS and we wouldn't
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// be executing here if there was a static/non-static mismatch.
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resolved_field = class_linker->ResolveField(field_idx, referrer, is_static);
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}
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if (UNLIKELY(resolved_field == nullptr)) {
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DCHECK(self->IsExceptionPending()); // Throw exception and unwind.
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return nullptr; // Failure.
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}
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ObjPtr<mirror::Class> fields_class = resolved_field->GetDeclaringClass();
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if (access_check) {
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if (UNLIKELY(resolved_field->IsStatic() != is_static)) {
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ThrowIncompatibleClassChangeErrorField(resolved_field, is_static, referrer);
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return nullptr;
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}
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ObjPtr<mirror::Class> referring_class = referrer->GetDeclaringClass();
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if (UNLIKELY(!referring_class->CheckResolvedFieldAccess(fields_class,
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resolved_field,
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referrer->GetDexCache(),
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field_idx))) {
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DCHECK(self->IsExceptionPending()); // Throw exception and unwind.
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return nullptr; // Failure.
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}
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if (UNLIKELY(is_set && !resolved_field->CanBeChangedBy(referrer))) {
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ThrowIllegalAccessErrorFinalField(referrer, resolved_field);
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return nullptr; // Failure.
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} else {
|
|
if (UNLIKELY(resolved_field->IsPrimitiveType() != is_primitive ||
|
|
resolved_field->FieldSize() != expected_size)) {
|
|
self->ThrowNewExceptionF("Ljava/lang/NoSuchFieldError;",
|
|
"Attempted read of %zd-bit %s on field '%s'",
|
|
expected_size * (32 / sizeof(int32_t)),
|
|
is_primitive ? "primitive" : "non-primitive",
|
|
resolved_field->PrettyField(true).c_str());
|
|
return nullptr; // Failure.
|
|
}
|
|
}
|
|
}
|
|
if (!is_static) {
|
|
// instance fields must be being accessed on an initialized class
|
|
return resolved_field;
|
|
} else {
|
|
// If the class is initialized we're done.
|
|
if (LIKELY(fields_class->IsVisiblyInitialized())) {
|
|
return resolved_field;
|
|
} else {
|
|
StackHandleScope<1> hs(self);
|
|
StackArtFieldHandleScope<1> rhs(self);
|
|
ReflectiveHandle<ArtField> resolved_field_handle(rhs.NewHandle(resolved_field));
|
|
if (LIKELY(class_linker->EnsureInitialized(self, hs.NewHandle(fields_class), true, true))) {
|
|
// Otherwise let's ensure the class is initialized before resolving the field.
|
|
return resolved_field_handle.Get();
|
|
}
|
|
DCHECK(self->IsExceptionPending()); // Throw exception and unwind
|
|
return nullptr; // Failure.
|
|
}
|
|
}
|
|
}
|
|
|
|
// Explicit template declarations of FindFieldFromCode for all field access types.
|
|
#define EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, _access_check) \
|
|
template REQUIRES_SHARED(Locks::mutator_lock_) ALWAYS_INLINE \
|
|
ArtField* FindFieldFromCode<_type, _access_check>(uint32_t field_idx, \
|
|
ArtMethod* referrer, \
|
|
Thread* self, size_t expected_size) \
|
|
|
|
#define EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(_type) \
|
|
EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, false); \
|
|
EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, true)
|
|
|
|
EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstanceObjectRead);
|
|
EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstanceObjectWrite);
|
|
EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstancePrimitiveRead);
|
|
EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstancePrimitiveWrite);
|
|
EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticObjectRead);
|
|
EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticObjectWrite);
|
|
EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticPrimitiveRead);
|
|
EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticPrimitiveWrite);
|
|
|
|
#undef EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL
|
|
#undef EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL
|
|
|
|
template<bool access_check>
|
|
ALWAYS_INLINE ArtMethod* FindSuperMethodToCall(uint32_t method_idx,
|
|
ArtMethod* resolved_method,
|
|
ArtMethod* referrer,
|
|
Thread* self)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
// TODO This lookup is quite slow.
|
|
// NB This is actually quite tricky to do any other way. We cannot use GetDeclaringClass since
|
|
// that will actually not be what we want in some cases where there are miranda methods or
|
|
// defaults. What we actually need is a GetContainingClass that says which classes virtuals
|
|
// this method is coming from.
|
|
ClassLinker* linker = Runtime::Current()->GetClassLinker();
|
|
dex::TypeIndex type_idx = referrer->GetDexFile()->GetMethodId(method_idx).class_idx_;
|
|
ObjPtr<mirror::Class> referenced_class = linker->ResolveType(type_idx, referrer);
|
|
if (UNLIKELY(referenced_class == nullptr)) {
|
|
DCHECK(self->IsExceptionPending());
|
|
return nullptr;
|
|
}
|
|
|
|
if (access_check) {
|
|
if (!referenced_class->IsAssignableFrom(referrer->GetDeclaringClass())) {
|
|
ThrowNoSuchMethodError(kSuper,
|
|
resolved_method->GetDeclaringClass(),
|
|
resolved_method->GetName(),
|
|
resolved_method->GetSignature());
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
if (referenced_class->IsInterface()) {
|
|
// TODO We can do better than this for a (compiled) fastpath.
|
|
ArtMethod* found_method = referenced_class->FindVirtualMethodForInterfaceSuper(
|
|
resolved_method, linker->GetImagePointerSize());
|
|
DCHECK(found_method != nullptr);
|
|
return found_method;
|
|
}
|
|
|
|
DCHECK(resolved_method->IsCopied() ||
|
|
!resolved_method->GetDeclaringClass()->IsInterface());
|
|
|
|
uint16_t vtable_index = resolved_method->GetMethodIndex();
|
|
ObjPtr<mirror::Class> super_class = referrer->GetDeclaringClass()->GetSuperClass();
|
|
if (access_check) {
|
|
DCHECK(super_class == nullptr || super_class->HasVTable());
|
|
// Check existence of super class.
|
|
if (super_class == nullptr ||
|
|
vtable_index >= static_cast<uint32_t>(super_class->GetVTableLength())) {
|
|
// Behavior to agree with that of the verifier.
|
|
ThrowNoSuchMethodError(kSuper,
|
|
resolved_method->GetDeclaringClass(),
|
|
resolved_method->GetName(),
|
|
resolved_method->GetSignature());
|
|
return nullptr; // Failure.
|
|
}
|
|
}
|
|
DCHECK(super_class != nullptr);
|
|
DCHECK(super_class->HasVTable());
|
|
return super_class->GetVTableEntry(vtable_index, linker->GetImagePointerSize());
|
|
}
|
|
|
|
// Follow virtual/interface indirections if applicable.
|
|
// Will throw null-pointer exception the if the object is null.
|
|
template<InvokeType type, bool access_check>
|
|
ALWAYS_INLINE ArtMethod* FindMethodToCall(uint32_t method_idx,
|
|
ArtMethod* resolved_method,
|
|
ObjPtr<mirror::Object>* this_object,
|
|
ArtMethod* referrer,
|
|
Thread* self)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
ClassLinker* const class_linker = Runtime::Current()->GetClassLinker();
|
|
// Null pointer check.
|
|
if (UNLIKELY(*this_object == nullptr && type != kStatic)) {
|
|
if (UNLIKELY(resolved_method->GetDeclaringClass()->IsStringClass() &&
|
|
resolved_method->IsConstructor())) {
|
|
// Hack for String init:
|
|
//
|
|
// We assume that the input of String.<init> in verified code is always
|
|
// an unitialized reference. If it is a null constant, it must have been
|
|
// optimized out by the compiler. Do not throw NullPointerException.
|
|
} else {
|
|
// Maintain interpreter-like semantics where NullPointerException is thrown
|
|
// after potential NoSuchMethodError from class linker.
|
|
ThrowNullPointerExceptionForMethodAccess(method_idx, type);
|
|
return nullptr; // Failure.
|
|
}
|
|
}
|
|
switch (type) {
|
|
case kStatic:
|
|
case kDirect:
|
|
return resolved_method;
|
|
case kVirtual: {
|
|
ObjPtr<mirror::Class> klass = (*this_object)->GetClass();
|
|
uint16_t vtable_index = resolved_method->GetMethodIndex();
|
|
if (access_check &&
|
|
(!klass->HasVTable() ||
|
|
vtable_index >= static_cast<uint32_t>(klass->GetVTableLength()))) {
|
|
// Behavior to agree with that of the verifier.
|
|
ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(),
|
|
resolved_method->GetName(), resolved_method->GetSignature());
|
|
return nullptr; // Failure.
|
|
}
|
|
DCHECK(klass->HasVTable()) << klass->PrettyClass();
|
|
return klass->GetVTableEntry(vtable_index, class_linker->GetImagePointerSize());
|
|
}
|
|
case kSuper: {
|
|
return FindSuperMethodToCall<access_check>(method_idx, resolved_method, referrer, self);
|
|
}
|
|
case kInterface: {
|
|
size_t imt_index = resolved_method->GetImtIndex();
|
|
PointerSize pointer_size = class_linker->GetImagePointerSize();
|
|
ObjPtr<mirror::Class> klass = (*this_object)->GetClass();
|
|
ArtMethod* imt_method = klass->GetImt(pointer_size)->Get(imt_index, pointer_size);
|
|
if (!imt_method->IsRuntimeMethod()) {
|
|
if (kIsDebugBuild) {
|
|
ArtMethod* method = klass->FindVirtualMethodForInterface(
|
|
resolved_method, class_linker->GetImagePointerSize());
|
|
CHECK_EQ(imt_method, method) << ArtMethod::PrettyMethod(resolved_method) << " / "
|
|
<< imt_method->PrettyMethod() << " / "
|
|
<< ArtMethod::PrettyMethod(method) << " / "
|
|
<< klass->PrettyClass();
|
|
}
|
|
return imt_method;
|
|
} else {
|
|
ArtMethod* interface_method = klass->FindVirtualMethodForInterface(
|
|
resolved_method, class_linker->GetImagePointerSize());
|
|
if (UNLIKELY(interface_method == nullptr)) {
|
|
ThrowIncompatibleClassChangeErrorClassForInterfaceDispatch(resolved_method,
|
|
*this_object, referrer);
|
|
return nullptr; // Failure.
|
|
}
|
|
return interface_method;
|
|
}
|
|
}
|
|
default:
|
|
LOG(FATAL) << "Unknown invoke type " << type;
|
|
return nullptr; // Failure.
|
|
}
|
|
}
|
|
|
|
template<InvokeType type, bool access_check>
|
|
inline ArtMethod* FindMethodFromCode(uint32_t method_idx,
|
|
ObjPtr<mirror::Object>* this_object,
|
|
ArtMethod* referrer,
|
|
Thread* self) {
|
|
ClassLinker* const class_linker = Runtime::Current()->GetClassLinker();
|
|
constexpr ClassLinker::ResolveMode resolve_mode =
|
|
access_check ? ClassLinker::ResolveMode::kCheckICCEAndIAE
|
|
: ClassLinker::ResolveMode::kNoChecks;
|
|
ArtMethod* resolved_method;
|
|
if (type == kStatic) {
|
|
resolved_method = class_linker->ResolveMethod<resolve_mode>(self, method_idx, referrer, type);
|
|
} else {
|
|
StackHandleScope<1> hs(self);
|
|
HandleWrapperObjPtr<mirror::Object> h_this(hs.NewHandleWrapper(this_object));
|
|
resolved_method = class_linker->ResolveMethod<resolve_mode>(self, method_idx, referrer, type);
|
|
}
|
|
if (UNLIKELY(resolved_method == nullptr)) {
|
|
DCHECK(self->IsExceptionPending()); // Throw exception and unwind.
|
|
return nullptr; // Failure.
|
|
}
|
|
return FindMethodToCall<type, access_check>(
|
|
method_idx, resolved_method, this_object, referrer, self);
|
|
}
|
|
|
|
// Explicit template declarations of FindMethodFromCode for all invoke types.
|
|
#define EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL(_type, _access_check) \
|
|
template REQUIRES_SHARED(Locks::mutator_lock_) ALWAYS_INLINE \
|
|
ArtMethod* FindMethodFromCode<_type, _access_check>(uint32_t method_idx, \
|
|
ObjPtr<mirror::Object>* this_object, \
|
|
ArtMethod* referrer, \
|
|
Thread* self)
|
|
#define EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(_type) \
|
|
EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL(_type, false); \
|
|
EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL(_type, true)
|
|
|
|
EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kStatic);
|
|
EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kDirect);
|
|
EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kVirtual);
|
|
EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kSuper);
|
|
EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kInterface);
|
|
|
|
#undef EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL
|
|
#undef EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL
|
|
|
|
inline ObjPtr<mirror::Class> ResolveVerifyAndClinit(dex::TypeIndex type_idx,
|
|
ArtMethod* referrer,
|
|
Thread* self,
|
|
bool can_run_clinit,
|
|
bool verify_access) {
|
|
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
|
|
ObjPtr<mirror::Class> klass = class_linker->ResolveType(type_idx, referrer);
|
|
if (UNLIKELY(klass == nullptr)) {
|
|
CHECK(self->IsExceptionPending());
|
|
return nullptr; // Failure - Indicate to caller to deliver exception
|
|
}
|
|
// Perform access check if necessary.
|
|
ObjPtr<mirror::Class> referring_class = referrer->GetDeclaringClass();
|
|
if (verify_access && UNLIKELY(!referring_class->CanAccess(klass))) {
|
|
ThrowIllegalAccessErrorClass(referring_class, klass);
|
|
return nullptr; // Failure - Indicate to caller to deliver exception
|
|
}
|
|
// If we're just implementing const-class, we shouldn't call <clinit>.
|
|
if (!can_run_clinit) {
|
|
return klass;
|
|
}
|
|
// If we are the <clinit> of this class, just return our storage.
|
|
//
|
|
// Do not set the DexCache InitializedStaticStorage, since that implies <clinit> has finished
|
|
// running.
|
|
if (klass == referring_class && referrer->IsConstructor() && referrer->IsStatic()) {
|
|
return klass;
|
|
}
|
|
StackHandleScope<1> hs(self);
|
|
Handle<mirror::Class> h_class(hs.NewHandle(klass));
|
|
if (!class_linker->EnsureInitialized(self, h_class, true, true)) {
|
|
CHECK(self->IsExceptionPending());
|
|
return nullptr; // Failure - Indicate to caller to deliver exception
|
|
}
|
|
return h_class.Get();
|
|
}
|
|
|
|
template <typename INT_TYPE, typename FLOAT_TYPE>
|
|
inline INT_TYPE art_float_to_integral(FLOAT_TYPE f) {
|
|
const INT_TYPE kMaxInt = static_cast<INT_TYPE>(std::numeric_limits<INT_TYPE>::max());
|
|
const INT_TYPE kMinInt = static_cast<INT_TYPE>(std::numeric_limits<INT_TYPE>::min());
|
|
const FLOAT_TYPE kMaxIntAsFloat = static_cast<FLOAT_TYPE>(kMaxInt);
|
|
const FLOAT_TYPE kMinIntAsFloat = static_cast<FLOAT_TYPE>(kMinInt);
|
|
if (LIKELY(f > kMinIntAsFloat)) {
|
|
if (LIKELY(f < kMaxIntAsFloat)) {
|
|
return static_cast<INT_TYPE>(f);
|
|
} else {
|
|
return kMaxInt;
|
|
}
|
|
} else {
|
|
return (f != f) ? 0 : kMinInt; // f != f implies NaN
|
|
}
|
|
}
|
|
|
|
inline bool NeedsClinitCheckBeforeCall(ArtMethod* method) {
|
|
// The class needs to be visibly initialized before we can use entrypoints to
|
|
// compiled code for static methods. See b/18161648 . The class initializer is
|
|
// special as it is invoked during initialization and does not need the check.
|
|
return method->IsStatic() && !method->IsConstructor();
|
|
}
|
|
|
|
inline ObjPtr<mirror::Object> GetGenericJniSynchronizationObject(Thread* self, ArtMethod* called)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
DCHECK(!called->IsCriticalNative());
|
|
DCHECK(!called->IsFastNative());
|
|
DCHECK(self->GetManagedStack()->GetTopQuickFrame() != nullptr);
|
|
DCHECK_EQ(*self->GetManagedStack()->GetTopQuickFrame(), called);
|
|
// We do not need read barriers here.
|
|
// On method entry, all reference arguments are to-space references and we mark the
|
|
// declaring class of a static native method if needed. When visiting thread roots at
|
|
// the start of a GC, we visit all these references to ensure they point to the to-space.
|
|
if (called->IsStatic()) {
|
|
// Static methods synchronize on the declaring class object.
|
|
return called->GetDeclaringClass<kWithoutReadBarrier>();
|
|
} else {
|
|
// Instance methods synchronize on the `this` object.
|
|
// The `this` reference is stored in the first out vreg in the caller's frame.
|
|
uint8_t* sp = reinterpret_cast<uint8_t*>(self->GetManagedStack()->GetTopQuickFrame());
|
|
size_t frame_size = RuntimeCalleeSaveFrame::GetFrameSize(CalleeSaveType::kSaveRefsAndArgs);
|
|
StackReference<mirror::Object>* this_ref = reinterpret_cast<StackReference<mirror::Object>*>(
|
|
sp + frame_size + static_cast<size_t>(kRuntimePointerSize));
|
|
return this_ref->AsMirrorPtr();
|
|
}
|
|
}
|
|
|
|
} // namespace art
|
|
|
|
#endif // ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_
|