/*
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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 <string>
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#include <vector>
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#include "android-base/logging.h"
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#include "base/logging.h"
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#include "base/os.h"
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#include "class_linker-inl.h"
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#include "dex/art_dex_file_loader.h"
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#include "dex/class_accessor-inl.h"
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#include "dex/dex_file-inl.h"
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#include "interpreter/unstarted_runtime.h"
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#include "mirror/class-inl.h"
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#include "mirror/dex_cache-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 "verifier/class_verifier.h"
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#include "well_known_classes.h"
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#include <sys/stat.h>
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#include "cmdline.h"
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namespace art {
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namespace {
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bool LoadDexFile(const std::string& dex_filename,
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std::vector<std::unique_ptr<const DexFile>>* dex_files) {
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const ArtDexFileLoader dex_file_loader;
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std::string error_msg;
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if (!dex_file_loader.Open(dex_filename.c_str(),
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dex_filename.c_str(),
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/* verify= */ true,
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/* verify_checksum= */ true,
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&error_msg,
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dex_files)) {
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LOG(ERROR) << error_msg;
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return false;
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}
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return true;
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}
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jobject Install(Runtime* runtime,
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std::vector<std::unique_ptr<const DexFile>>& in,
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std::vector<const DexFile*>* out)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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Thread* self = Thread::Current();
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CHECK(self != nullptr);
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// Need well-known-classes.
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WellKnownClasses::Init(self->GetJniEnv());
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// Need a class loader. Fake that we're a compiler.
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// Note: this will run initializers through the unstarted runtime, so make sure it's
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// initialized.
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interpreter::UnstartedRuntime::Initialize();
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for (std::unique_ptr<const DexFile>& dex_file : in) {
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out->push_back(dex_file.release());
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}
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ClassLinker* class_linker = runtime->GetClassLinker();
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jobject class_loader = class_linker->CreatePathClassLoader(self, *out);
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// Need to register dex files to get a working dex cache.
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for (const DexFile* dex_file : *out) {
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ObjPtr<mirror::DexCache> dex_cache = class_linker->RegisterDexFile(
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*dex_file, self->DecodeJObject(class_loader)->AsClassLoader());
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CHECK(dex_cache != nullptr);
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}
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return class_loader;
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}
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struct MethodVerifierArgs : public CmdlineArgs {
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protected:
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using Base = CmdlineArgs;
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ParseStatus ParseCustom(const char* raw_option,
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size_t raw_option_length,
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std::string* error_msg) override {
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DCHECK_EQ(strlen(raw_option), raw_option_length);
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{
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ParseStatus base_parse = Base::ParseCustom(raw_option, raw_option_length, error_msg);
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if (base_parse != kParseUnknownArgument) {
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return base_parse;
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}
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}
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std::string_view option(raw_option, raw_option_length);
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if (StartsWith(option, "--dex-file=")) {
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dex_filename_ = raw_option + strlen("--dex-file=");
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} else if (option == "--dex-file-verifier") {
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dex_file_verifier_ = true;
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} else if (option == "--verbose") {
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method_verifier_verbose_ = true;
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} else if (option == "--verbose-debug") {
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method_verifier_verbose_debug_ = true;
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} else if (StartsWith(option, "--repetitions=")) {
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char* end;
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repetitions_ = strtoul(raw_option + strlen("--repetitions="), &end, 10);
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} else if (StartsWith(option, "--api-level=")) {
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char* end;
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api_level_ = strtoul(raw_option + strlen("--api-level="), &end, 10);
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} else {
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return kParseUnknownArgument;
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}
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return kParseOk;
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}
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ParseStatus ParseChecks(std::string* error_msg) override {
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// Perform the parent checks.
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ParseStatus parent_checks = Base::ParseChecks(error_msg);
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if (parent_checks != kParseOk) {
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return parent_checks;
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}
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// Perform our own checks.
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if (dex_filename_ == nullptr) {
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*error_msg = "--dex-filename not set";
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return kParseError;
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}
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return kParseOk;
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}
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std::string GetUsage() const override {
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std::string usage;
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usage +=
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"Usage: method_verifier_cmd [options] ...\n"
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// Dex file is required.
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" --dex-file=<file.dex>: specifies an input dex file.\n"
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" Example: --dex-file=app.apk\n"
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" --dex-file-verifier: only run dex file verifier.\n"
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" --verbose: use verbose verifier mode.\n"
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" --verbose-debug: use verbose verifier debug mode.\n"
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" --repetitions=<count>: repeat the verification count times.\n"
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" --api-level=<level>: use API level for verification.\n"
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"\n";
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usage += Base::GetUsage();
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return usage;
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}
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public:
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const char* dex_filename_ = nullptr;
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bool dex_file_verifier_ = false;
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bool method_verifier_verbose_ = false;
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bool method_verifier_verbose_debug_ = false;
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size_t repetitions_ = 0u;
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uint32_t api_level_ = 0u;
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};
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struct MethodVerifierMain : public CmdlineMain<MethodVerifierArgs> {
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bool NeedsRuntime() override {
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return true;
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}
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bool ExecuteWithoutRuntime() override {
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LOG(FATAL) << "Unreachable";
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UNREACHABLE();
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}
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bool ExecuteWithRuntime(Runtime* runtime) override {
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CHECK(args_ != nullptr);
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const size_t dex_reps = args_->dex_file_verifier_
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// If we're focused on the dex file verifier, use the
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// repetitions parameter.
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? std::max(static_cast<size_t>(1u), args_->repetitions_)
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// Otherwise just load the dex files once.
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: 1;
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std::vector<std::unique_ptr<const DexFile>> unique_dex_files;
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for (size_t i = 0; i != dex_reps; ++i) {
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if (args_->dex_file_verifier_ && args_->repetitions_ != 0) {
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LOG(INFO) << "Repetition " << (i + 1);
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}
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unique_dex_files.clear();
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if (!LoadDexFile(args_->dex_filename_, &unique_dex_files)) {
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return false;
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}
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}
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if (args_->dex_file_verifier_) {
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// We're done here.
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return true;
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}
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ScopedObjectAccess soa(Thread::Current());
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std::vector<const DexFile*> dex_files;
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jobject class_loader = Install(runtime, unique_dex_files, &dex_files);
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CHECK(class_loader != nullptr);
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StackHandleScope<2> scope(soa.Self());
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Handle<mirror::ClassLoader> h_loader = scope.NewHandle(
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soa.Decode<mirror::ClassLoader>(class_loader));
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MutableHandle<mirror::Class> h_klass(scope.NewHandle<mirror::Class>(nullptr));
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if (args_->method_verifier_verbose_) {
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gLogVerbosity.verifier = true;
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}
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if (args_->method_verifier_verbose_debug_) {
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gLogVerbosity.verifier_debug = true;
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}
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const size_t verifier_reps = std::max(static_cast<size_t>(1u), args_->repetitions_);
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ClassLinker* class_linker = runtime->GetClassLinker();
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for (size_t i = 0; i != verifier_reps; ++i) {
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if (args_->repetitions_ != 0) {
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LOG(INFO) << "Repetition " << (i + 1);
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}
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for (const DexFile* dex_file : dex_files) {
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for (ClassAccessor accessor : dex_file->GetClasses()) {
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const char* descriptor = accessor.GetDescriptor();
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h_klass.Assign(class_linker->FindClass(soa.Self(), descriptor, h_loader));
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if (h_klass == nullptr || h_klass->IsErroneous()) {
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if (args_->repetitions_ == 0) {
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LOG(ERROR) << "Warning: could not load " << descriptor;
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}
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soa.Self()->ClearException();
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continue;
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}
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std::string error_msg;
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verifier::FailureKind res =
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verifier::ClassVerifier::VerifyClass(soa.Self(),
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h_klass.Get(),
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runtime->GetCompilerCallbacks(),
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true,
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verifier::HardFailLogMode::kLogWarning,
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args_->api_level_,
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&error_msg);
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if (args_->repetitions_ == 0) {
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LOG(INFO) << descriptor << ": " << res << " " << error_msg;
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}
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}
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}
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}
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return true;
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}
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};
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} // namespace
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} // namespace art
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int main(int argc, char** argv) {
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// Output all logging to stderr.
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android::base::SetLogger(android::base::StderrLogger);
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art::MethodVerifierMain main;
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return main.Main(argc, argv);
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}
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