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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "parsed_options.h"
     18 
     19 #include <sstream>
     20 
     21 #include "base/logging.h"
     22 #include "base/stringpiece.h"
     23 #include "debugger.h"
     24 #include "gc/heap.h"
     25 #include "monitor.h"
     26 #include "runtime.h"
     27 #include "ti/agent.h"
     28 #include "trace.h"
     29 #include "utils.h"
     30 
     31 #include "cmdline_parser.h"
     32 #include "runtime_options.h"
     33 
     34 namespace art {
     35 
     36 using MemoryKiB = Memory<1024>;
     37 
     38 ParsedOptions::ParsedOptions()
     39   : hook_is_sensitive_thread_(nullptr),
     40     hook_vfprintf_(vfprintf),
     41     hook_exit_(exit),
     42     hook_abort_(nullptr) {                          // We don't call abort(3) by default; see
     43                                                     // Runtime::Abort
     44 }
     45 
     46 bool ParsedOptions::Parse(const RuntimeOptions& options,
     47                           bool ignore_unrecognized,
     48                           RuntimeArgumentMap* runtime_options) {
     49   CHECK(runtime_options != nullptr);
     50 
     51   ParsedOptions parser;
     52   return parser.DoParse(options, ignore_unrecognized, runtime_options);
     53 }
     54 
     55 using RuntimeParser = CmdlineParser<RuntimeArgumentMap, RuntimeArgumentMap::Key>;
     56 
     57 // Yes, the stack frame is huge. But we get called super early on (and just once)
     58 // to pass the command line arguments, so we'll probably be ok.
     59 // Ideas to avoid suppressing this diagnostic are welcome!
     60 #pragma GCC diagnostic push
     61 #pragma GCC diagnostic ignored "-Wframe-larger-than="
     62 
     63 std::unique_ptr<RuntimeParser> ParsedOptions::MakeParser(bool ignore_unrecognized) {
     64   using M = RuntimeArgumentMap;
     65 
     66   std::unique_ptr<RuntimeParser::Builder> parser_builder =
     67       std::unique_ptr<RuntimeParser::Builder>(new RuntimeParser::Builder());
     68 
     69   parser_builder->
     70        Define("-Xzygote")
     71           .IntoKey(M::Zygote)
     72       .Define("-help")
     73           .IntoKey(M::Help)
     74       .Define("-showversion")
     75           .IntoKey(M::ShowVersion)
     76       .Define("-Xbootclasspath:_")
     77           .WithType<std::string>()
     78           .IntoKey(M::BootClassPath)
     79       .Define("-Xbootclasspath-locations:_")
     80           .WithType<ParseStringList<':'>>()  // std::vector<std::string>, split by :
     81           .IntoKey(M::BootClassPathLocations)
     82       .Define({"-classpath _", "-cp _"})
     83           .WithType<std::string>()
     84           .IntoKey(M::ClassPath)
     85       .Define("-Ximage:_")
     86           .WithType<std::string>()
     87           .IntoKey(M::Image)
     88       .Define("-Xcheck:jni")
     89           .IntoKey(M::CheckJni)
     90       .Define("-Xjniopts:forcecopy")
     91           .IntoKey(M::JniOptsForceCopy)
     92       .Define({"-Xrunjdwp:_", "-agentlib:jdwp=_"})
     93           .WithType<JDWP::JdwpOptions>()
     94           .IntoKey(M::JdwpOptions)
     95       // TODO Re-enable -agentlib: once I have a good way to transform the values.
     96       // .Define("-agentlib:_")
     97       //     .WithType<std::vector<ti::Agent>>().AppendValues()
     98       //     .IntoKey(M::AgentLib)
     99       .Define("-agentpath:_")
    100           .WithType<std::list<ti::Agent>>().AppendValues()
    101           .IntoKey(M::AgentPath)
    102       .Define("-Xms_")
    103           .WithType<MemoryKiB>()
    104           .IntoKey(M::MemoryInitialSize)
    105       .Define("-Xmx_")
    106           .WithType<MemoryKiB>()
    107           .IntoKey(M::MemoryMaximumSize)
    108       .Define("-XX:HeapGrowthLimit=_")
    109           .WithType<MemoryKiB>()
    110           .IntoKey(M::HeapGrowthLimit)
    111       .Define("-XX:HeapMinFree=_")
    112           .WithType<MemoryKiB>()
    113           .IntoKey(M::HeapMinFree)
    114       .Define("-XX:HeapMaxFree=_")
    115           .WithType<MemoryKiB>()
    116           .IntoKey(M::HeapMaxFree)
    117       .Define("-XX:NonMovingSpaceCapacity=_")
    118           .WithType<MemoryKiB>()
    119           .IntoKey(M::NonMovingSpaceCapacity)
    120       .Define("-XX:HeapTargetUtilization=_")
    121           .WithType<double>().WithRange(0.1, 0.9)
    122           .IntoKey(M::HeapTargetUtilization)
    123       .Define("-XX:ForegroundHeapGrowthMultiplier=_")
    124           .WithType<double>().WithRange(0.1, 5.0)
    125           .IntoKey(M::ForegroundHeapGrowthMultiplier)
    126       .Define("-XX:ParallelGCThreads=_")
    127           .WithType<unsigned int>()
    128           .IntoKey(M::ParallelGCThreads)
    129       .Define("-XX:ConcGCThreads=_")
    130           .WithType<unsigned int>()
    131           .IntoKey(M::ConcGCThreads)
    132       .Define("-Xss_")
    133           .WithType<Memory<1>>()
    134           .IntoKey(M::StackSize)
    135       .Define("-XX:MaxSpinsBeforeThinLockInflation=_")
    136           .WithType<unsigned int>()
    137           .IntoKey(M::MaxSpinsBeforeThinLockInflation)
    138       .Define("-XX:LongPauseLogThreshold=_")  // in ms
    139           .WithType<MillisecondsToNanoseconds>()  // store as ns
    140           .IntoKey(M::LongPauseLogThreshold)
    141       .Define("-XX:LongGCLogThreshold=_")  // in ms
    142           .WithType<MillisecondsToNanoseconds>()  // store as ns
    143           .IntoKey(M::LongGCLogThreshold)
    144       .Define("-XX:DumpGCPerformanceOnShutdown")
    145           .IntoKey(M::DumpGCPerformanceOnShutdown)
    146       .Define("-XX:DumpJITInfoOnShutdown")
    147           .IntoKey(M::DumpJITInfoOnShutdown)
    148       .Define("-XX:IgnoreMaxFootprint")
    149           .IntoKey(M::IgnoreMaxFootprint)
    150       .Define("-XX:LowMemoryMode")
    151           .IntoKey(M::LowMemoryMode)
    152       .Define("-XX:UseTLAB")
    153           .WithValue(true)
    154           .IntoKey(M::UseTLAB)
    155       .Define({"-XX:EnableHSpaceCompactForOOM", "-XX:DisableHSpaceCompactForOOM"})
    156           .WithValues({true, false})
    157           .IntoKey(M::EnableHSpaceCompactForOOM)
    158       .Define("-XX:DumpNativeStackOnSigQuit:_")
    159           .WithType<bool>()
    160           .WithValueMap({{"false", false}, {"true", true}})
    161           .IntoKey(M::DumpNativeStackOnSigQuit)
    162       .Define("-XX:MadviseRandomAccess:_")
    163           .WithType<bool>()
    164           .WithValueMap({{"false", false}, {"true", true}})
    165           .IntoKey(M::MadviseRandomAccess)
    166       .Define("-Xusejit:_")
    167           .WithType<bool>()
    168           .WithValueMap({{"false", false}, {"true", true}})
    169           .IntoKey(M::UseJitCompilation)
    170       .Define("-Xjitinitialsize:_")
    171           .WithType<MemoryKiB>()
    172           .IntoKey(M::JITCodeCacheInitialCapacity)
    173       .Define("-Xjitmaxsize:_")
    174           .WithType<MemoryKiB>()
    175           .IntoKey(M::JITCodeCacheMaxCapacity)
    176       .Define("-Xjitthreshold:_")
    177           .WithType<unsigned int>()
    178           .IntoKey(M::JITCompileThreshold)
    179       .Define("-Xjitwarmupthreshold:_")
    180           .WithType<unsigned int>()
    181           .IntoKey(M::JITWarmupThreshold)
    182       .Define("-Xjitosrthreshold:_")
    183           .WithType<unsigned int>()
    184           .IntoKey(M::JITOsrThreshold)
    185       .Define("-Xjitprithreadweight:_")
    186           .WithType<unsigned int>()
    187           .IntoKey(M::JITPriorityThreadWeight)
    188       .Define("-Xjittransitionweight:_")
    189           .WithType<unsigned int>()
    190           .IntoKey(M::JITInvokeTransitionWeight)
    191       .Define("-Xjitsaveprofilinginfo")
    192           .WithType<ProfileSaverOptions>()
    193           .AppendValues()
    194           .IntoKey(M::ProfileSaverOpts)
    195       .Define("-Xps-_")  // profile saver options -Xps-<key>:<value>
    196           .WithType<ProfileSaverOptions>()
    197           .AppendValues()
    198           .IntoKey(M::ProfileSaverOpts)  // NOTE: Appends into same key as -Xjitsaveprofilinginfo
    199       .Define("-XX:HspaceCompactForOOMMinIntervalMs=_")  // in ms
    200           .WithType<MillisecondsToNanoseconds>()  // store as ns
    201           .IntoKey(M::HSpaceCompactForOOMMinIntervalsMs)
    202       .Define("-D_")
    203           .WithType<std::vector<std::string>>().AppendValues()
    204           .IntoKey(M::PropertiesList)
    205       .Define("-Xjnitrace:_")
    206           .WithType<std::string>()
    207           .IntoKey(M::JniTrace)
    208       .Define("-Xpatchoat:_")
    209           .WithType<std::string>()
    210           .IntoKey(M::PatchOat)
    211       .Define({"-Xrelocate", "-Xnorelocate"})
    212           .WithValues({true, false})
    213           .IntoKey(M::Relocate)
    214       .Define({"-Xdex2oat", "-Xnodex2oat"})
    215           .WithValues({true, false})
    216           .IntoKey(M::Dex2Oat)
    217       .Define({"-Ximage-dex2oat", "-Xnoimage-dex2oat"})
    218           .WithValues({true, false})
    219           .IntoKey(M::ImageDex2Oat)
    220       .Define("-Xint")
    221           .WithValue(true)
    222           .IntoKey(M::Interpret)
    223       .Define("-Xgc:_")
    224           .WithType<XGcOption>()
    225           .IntoKey(M::GcOption)
    226       .Define("-XX:LargeObjectSpace=_")
    227           .WithType<gc::space::LargeObjectSpaceType>()
    228           .WithValueMap({{"disabled", gc::space::LargeObjectSpaceType::kDisabled},
    229                          {"freelist", gc::space::LargeObjectSpaceType::kFreeList},
    230                          {"map",      gc::space::LargeObjectSpaceType::kMap}})
    231           .IntoKey(M::LargeObjectSpace)
    232       .Define("-XX:LargeObjectThreshold=_")
    233           .WithType<Memory<1>>()
    234           .IntoKey(M::LargeObjectThreshold)
    235       .Define("-XX:BackgroundGC=_")
    236           .WithType<BackgroundGcOption>()
    237           .IntoKey(M::BackgroundGc)
    238       .Define("-XX:+DisableExplicitGC")
    239           .IntoKey(M::DisableExplicitGC)
    240       .Define("-verbose:_")
    241           .WithType<LogVerbosity>()
    242           .IntoKey(M::Verbose)
    243       .Define("-Xlockprofthreshold:_")
    244           .WithType<unsigned int>()
    245           .IntoKey(M::LockProfThreshold)
    246       .Define("-Xstackdumplockprofthreshold:_")
    247           .WithType<unsigned int>()
    248           .IntoKey(M::StackDumpLockProfThreshold)
    249       .Define("-Xusetombstonedtraces")
    250           .WithValue(true)
    251           .IntoKey(M::UseTombstonedTraces)
    252       .Define("-Xstacktracefile:_")
    253           .WithType<std::string>()
    254           .IntoKey(M::StackTraceFile)
    255       .Define("-Xmethod-trace")
    256           .IntoKey(M::MethodTrace)
    257       .Define("-Xmethod-trace-file:_")
    258           .WithType<std::string>()
    259           .IntoKey(M::MethodTraceFile)
    260       .Define("-Xmethod-trace-file-size:_")
    261           .WithType<unsigned int>()
    262           .IntoKey(M::MethodTraceFileSize)
    263       .Define("-Xmethod-trace-stream")
    264           .IntoKey(M::MethodTraceStreaming)
    265       .Define("-Xprofile:_")
    266           .WithType<TraceClockSource>()
    267           .WithValueMap({{"threadcpuclock", TraceClockSource::kThreadCpu},
    268                          {"wallclock",      TraceClockSource::kWall},
    269                          {"dualclock",      TraceClockSource::kDual}})
    270           .IntoKey(M::ProfileClock)
    271       .Define("-Xcompiler:_")
    272           .WithType<std::string>()
    273           .IntoKey(M::Compiler)
    274       .Define("-Xcompiler-option _")
    275           .WithType<std::vector<std::string>>()
    276           .AppendValues()
    277           .IntoKey(M::CompilerOptions)
    278       .Define("-Ximage-compiler-option _")
    279           .WithType<std::vector<std::string>>()
    280           .AppendValues()
    281           .IntoKey(M::ImageCompilerOptions)
    282       .Define("-Xverify:_")
    283           .WithType<verifier::VerifyMode>()
    284           .WithValueMap({{"none",     verifier::VerifyMode::kNone},
    285                          {"remote",   verifier::VerifyMode::kEnable},
    286                          {"all",      verifier::VerifyMode::kEnable},
    287                          {"softfail", verifier::VerifyMode::kSoftFail}})
    288           .IntoKey(M::Verify)
    289       .Define("-XX:NativeBridge=_")
    290           .WithType<std::string>()
    291           .IntoKey(M::NativeBridge)
    292       .Define("-Xzygote-max-boot-retry=_")
    293           .WithType<unsigned int>()
    294           .IntoKey(M::ZygoteMaxFailedBoots)
    295       .Define("-Xno-dex-file-fallback")
    296           .IntoKey(M::NoDexFileFallback)
    297       .Define("-Xno-sig-chain")
    298           .IntoKey(M::NoSigChain)
    299       .Define("--cpu-abilist=_")
    300           .WithType<std::string>()
    301           .IntoKey(M::CpuAbiList)
    302       .Define("-Xfingerprint:_")
    303           .WithType<std::string>()
    304           .IntoKey(M::Fingerprint)
    305       .Define("-Xexperimental:_")
    306           .WithType<ExperimentalFlags>()
    307           .AppendValues()
    308           .IntoKey(M::Experimental)
    309       .Define("-Xforce-nb-testing")
    310           .IntoKey(M::ForceNativeBridge)
    311       .Define("-Xplugin:_")
    312           .WithType<std::vector<Plugin>>().AppendValues()
    313           .IntoKey(M::Plugins)
    314       .Define("-XX:ThreadSuspendTimeout=_")  // in ms
    315           .WithType<MillisecondsToNanoseconds>()  // store as ns
    316           .IntoKey(M::ThreadSuspendTimeout)
    317       .Define("-XX:SlowDebug=_")
    318           .WithType<bool>()
    319           .WithValueMap({{"false", false}, {"true", true}})
    320           .IntoKey(M::SlowDebug)
    321       .Ignore({
    322           "-ea", "-da", "-enableassertions", "-disableassertions", "--runtime-arg", "-esa",
    323           "-dsa", "-enablesystemassertions", "-disablesystemassertions", "-Xrs", "-Xint:_",
    324           "-Xdexopt:_", "-Xnoquithandler", "-Xjnigreflimit:_", "-Xgenregmap", "-Xnogenregmap",
    325           "-Xverifyopt:_", "-Xcheckdexsum", "-Xincludeselectedop", "-Xjitop:_",
    326           "-Xincludeselectedmethod", "-Xjitthreshold:_",
    327           "-Xjitblocking", "-Xjitmethod:_", "-Xjitclass:_", "-Xjitoffset:_",
    328           "-Xjitconfig:_", "-Xjitcheckcg", "-Xjitverbose", "-Xjitprofile",
    329           "-Xjitdisableopt", "-Xjitsuspendpoll", "-XX:mainThreadStackSize=_"})
    330       .IgnoreUnrecognized(ignore_unrecognized);
    331 
    332   // TODO: Move Usage information into this DSL.
    333 
    334   return std::unique_ptr<RuntimeParser>(new RuntimeParser(parser_builder->Build()));
    335 }
    336 
    337 #pragma GCC diagnostic pop
    338 
    339 // Remove all the special options that have something in the void* part of the option.
    340 // If runtime_options is not null, put the options in there.
    341 // As a side-effect, populate the hooks from options.
    342 bool ParsedOptions::ProcessSpecialOptions(const RuntimeOptions& options,
    343                                           RuntimeArgumentMap* runtime_options,
    344                                           std::vector<std::string>* out_options) {
    345   using M = RuntimeArgumentMap;
    346 
    347   // TODO: Move the below loop into JNI
    348   // Handle special options that set up hooks
    349   for (size_t i = 0; i < options.size(); ++i) {
    350     const std::string option(options[i].first);
    351       // TODO: support -Djava.class.path
    352     if (option == "bootclasspath") {
    353       auto boot_class_path = static_cast<std::vector<std::unique_ptr<const DexFile>>*>(
    354           const_cast<void*>(options[i].second));
    355 
    356       if (runtime_options != nullptr) {
    357         runtime_options->Set(M::BootClassPathDexList, boot_class_path);
    358       }
    359     } else if (option == "compilercallbacks") {
    360       CompilerCallbacks* compiler_callbacks =
    361           reinterpret_cast<CompilerCallbacks*>(const_cast<void*>(options[i].second));
    362       if (runtime_options != nullptr) {
    363         runtime_options->Set(M::CompilerCallbacksPtr, compiler_callbacks);
    364       }
    365     } else if (option == "imageinstructionset") {
    366       const char* isa_str = reinterpret_cast<const char*>(options[i].second);
    367       auto&& image_isa = GetInstructionSetFromString(isa_str);
    368       if (image_isa == kNone) {
    369         Usage("%s is not a valid instruction set.", isa_str);
    370         return false;
    371       }
    372       if (runtime_options != nullptr) {
    373         runtime_options->Set(M::ImageInstructionSet, image_isa);
    374       }
    375     } else if (option == "sensitiveThread") {
    376       const void* hook = options[i].second;
    377       bool (*hook_is_sensitive_thread)() = reinterpret_cast<bool (*)()>(const_cast<void*>(hook));
    378 
    379       if (runtime_options != nullptr) {
    380         runtime_options->Set(M::HookIsSensitiveThread, hook_is_sensitive_thread);
    381       }
    382     } else if (option == "vfprintf") {
    383       const void* hook = options[i].second;
    384       if (hook == nullptr) {
    385         Usage("vfprintf argument was nullptr");
    386         return false;
    387       }
    388       int (*hook_vfprintf)(FILE *, const char*, va_list) =
    389           reinterpret_cast<int (*)(FILE *, const char*, va_list)>(const_cast<void*>(hook));
    390 
    391       if (runtime_options != nullptr) {
    392         runtime_options->Set(M::HookVfprintf, hook_vfprintf);
    393       }
    394       hook_vfprintf_ = hook_vfprintf;
    395     } else if (option == "exit") {
    396       const void* hook = options[i].second;
    397       if (hook == nullptr) {
    398         Usage("exit argument was nullptr");
    399         return false;
    400       }
    401       void(*hook_exit)(jint) = reinterpret_cast<void(*)(jint)>(const_cast<void*>(hook));
    402       if (runtime_options != nullptr) {
    403         runtime_options->Set(M::HookExit, hook_exit);
    404       }
    405       hook_exit_ = hook_exit;
    406     } else if (option == "abort") {
    407       const void* hook = options[i].second;
    408       if (hook == nullptr) {
    409         Usage("abort was nullptr\n");
    410         return false;
    411       }
    412       void(*hook_abort)() = reinterpret_cast<void(*)()>(const_cast<void*>(hook));
    413       if (runtime_options != nullptr) {
    414         runtime_options->Set(M::HookAbort, hook_abort);
    415       }
    416       hook_abort_ = hook_abort;
    417     } else {
    418       // It is a regular option, that doesn't have a known 'second' value.
    419       // Push it on to the regular options which will be parsed by our parser.
    420       if (out_options != nullptr) {
    421         out_options->push_back(option);
    422       }
    423     }
    424   }
    425 
    426   return true;
    427 }
    428 
    429 // Intended for local changes only.
    430 static void MaybeOverrideVerbosity() {
    431   //  gLogVerbosity.class_linker = true;  // TODO: don't check this in!
    432   //  gLogVerbosity.collector = true;  // TODO: don't check this in!
    433   //  gLogVerbosity.compiler = true;  // TODO: don't check this in!
    434   //  gLogVerbosity.deopt = true;  // TODO: don't check this in!
    435   //  gLogVerbosity.gc = true;  // TODO: don't check this in!
    436   //  gLogVerbosity.heap = true;  // TODO: don't check this in!
    437   //  gLogVerbosity.jdwp = true;  // TODO: don't check this in!
    438   //  gLogVerbosity.jit = true;  // TODO: don't check this in!
    439   //  gLogVerbosity.jni = true;  // TODO: don't check this in!
    440   //  gLogVerbosity.monitor = true;  // TODO: don't check this in!
    441   //  gLogVerbosity.oat = true;  // TODO: don't check this in!
    442   //  gLogVerbosity.profiler = true;  // TODO: don't check this in!
    443   //  gLogVerbosity.signals = true;  // TODO: don't check this in!
    444   //  gLogVerbosity.simulator = true; // TODO: don't check this in!
    445   //  gLogVerbosity.startup = true;  // TODO: don't check this in!
    446   //  gLogVerbosity.third_party_jni = true;  // TODO: don't check this in!
    447   //  gLogVerbosity.threads = true;  // TODO: don't check this in!
    448   //  gLogVerbosity.verifier = true;  // TODO: don't check this in!
    449 }
    450 
    451 bool ParsedOptions::DoParse(const RuntimeOptions& options,
    452                             bool ignore_unrecognized,
    453                             RuntimeArgumentMap* runtime_options) {
    454   for (size_t i = 0; i < options.size(); ++i) {
    455     if (true && options[0].first == "-Xzygote") {
    456       LOG(INFO) << "option[" << i << "]=" << options[i].first;
    457     }
    458   }
    459 
    460   auto parser = MakeParser(ignore_unrecognized);
    461 
    462   // Convert to a simple string list (without the magic pointer options)
    463   std::vector<std::string> argv_list;
    464   if (!ProcessSpecialOptions(options, nullptr, &argv_list)) {
    465     return false;
    466   }
    467 
    468   CmdlineResult parse_result = parser->Parse(argv_list);
    469 
    470   // Handle parse errors by displaying the usage and potentially exiting.
    471   if (parse_result.IsError()) {
    472     if (parse_result.GetStatus() == CmdlineResult::kUsage) {
    473       UsageMessage(stdout, "%s\n", parse_result.GetMessage().c_str());
    474       Exit(0);
    475     } else if (parse_result.GetStatus() == CmdlineResult::kUnknown && !ignore_unrecognized) {
    476       Usage("%s\n", parse_result.GetMessage().c_str());
    477       return false;
    478     } else {
    479       Usage("%s\n", parse_result.GetMessage().c_str());
    480       Exit(0);
    481     }
    482 
    483     UNREACHABLE();
    484   }
    485 
    486   using M = RuntimeArgumentMap;
    487   RuntimeArgumentMap args = parser->ReleaseArgumentsMap();
    488 
    489   // -help, -showversion, etc.
    490   if (args.Exists(M::Help)) {
    491     Usage(nullptr);
    492     return false;
    493   } else if (args.Exists(M::ShowVersion)) {
    494     UsageMessage(stdout,
    495                  "ART version %s %s\n",
    496                  Runtime::GetVersion(),
    497                  GetInstructionSetString(kRuntimeISA));
    498     Exit(0);
    499   } else if (args.Exists(M::BootClassPath)) {
    500     LOG(INFO) << "setting boot class path to " << *args.Get(M::BootClassPath);
    501   }
    502 
    503   if (args.GetOrDefault(M::UseJitCompilation) && args.GetOrDefault(M::Interpret)) {
    504     Usage("-Xusejit:true and -Xint cannot be specified together");
    505     Exit(0);
    506   }
    507 
    508   // Set a default boot class path if we didn't get an explicit one via command line.
    509   if (getenv("BOOTCLASSPATH") != nullptr) {
    510     args.SetIfMissing(M::BootClassPath, std::string(getenv("BOOTCLASSPATH")));
    511   }
    512 
    513   // Set a default class path if we didn't get an explicit one via command line.
    514   if (getenv("CLASSPATH") != nullptr) {
    515     args.SetIfMissing(M::ClassPath, std::string(getenv("CLASSPATH")));
    516   }
    517 
    518   // Default to number of processors minus one since the main GC thread also does work.
    519   args.SetIfMissing(M::ParallelGCThreads, gc::Heap::kDefaultEnableParallelGC ?
    520       static_cast<unsigned int>(sysconf(_SC_NPROCESSORS_CONF) - 1u) : 0u);
    521 
    522   // -verbose:
    523   {
    524     LogVerbosity *log_verbosity = args.Get(M::Verbose);
    525     if (log_verbosity != nullptr) {
    526       gLogVerbosity = *log_verbosity;
    527     }
    528   }
    529 
    530   MaybeOverrideVerbosity();
    531 
    532   SetRuntimeDebugFlagsEnabled(args.Get(M::SlowDebug));
    533 
    534   // -Xprofile:
    535   Trace::SetDefaultClockSource(args.GetOrDefault(M::ProfileClock));
    536 
    537   if (!ProcessSpecialOptions(options, &args, nullptr)) {
    538       return false;
    539   }
    540 
    541   {
    542     // If not set, background collector type defaults to homogeneous compaction.
    543     // If foreground is GSS, use GSS as background collector.
    544     // If not low memory mode, semispace otherwise.
    545 
    546     gc::CollectorType background_collector_type_;
    547     gc::CollectorType collector_type_ = (XGcOption{}).collector_type_;  // NOLINT [whitespace/braces] [5]
    548     bool low_memory_mode_ = args.Exists(M::LowMemoryMode);
    549 
    550     background_collector_type_ = args.GetOrDefault(M::BackgroundGc);
    551     {
    552       XGcOption* xgc = args.Get(M::GcOption);
    553       if (xgc != nullptr && xgc->collector_type_ != gc::kCollectorTypeNone) {
    554         collector_type_ = xgc->collector_type_;
    555       }
    556     }
    557 
    558     if (background_collector_type_ == gc::kCollectorTypeNone) {
    559       if (collector_type_ != gc::kCollectorTypeGSS) {
    560         background_collector_type_ = low_memory_mode_ ?
    561             gc::kCollectorTypeSS : gc::kCollectorTypeHomogeneousSpaceCompact;
    562       } else {
    563         background_collector_type_ = collector_type_;
    564       }
    565     }
    566 
    567     args.Set(M::BackgroundGc, BackgroundGcOption { background_collector_type_ });
    568   }
    569 
    570   // If a reference to the dalvik core.jar snuck in, replace it with
    571   // the art specific version. This can happen with on device
    572   // boot.art/boot.oat generation by GenerateImage which relies on the
    573   // value of BOOTCLASSPATH.
    574 #if defined(ART_TARGET)
    575   std::string core_jar("/core.jar");
    576   std::string core_libart_jar("/core-libart.jar");
    577 #else
    578   // The host uses hostdex files.
    579   std::string core_jar("/core-hostdex.jar");
    580   std::string core_libart_jar("/core-libart-hostdex.jar");
    581 #endif
    582   auto boot_class_path_string = args.GetOrDefault(M::BootClassPath);
    583 
    584   size_t core_jar_pos = boot_class_path_string.find(core_jar);
    585   if (core_jar_pos != std::string::npos) {
    586     boot_class_path_string.replace(core_jar_pos, core_jar.size(), core_libart_jar);
    587     args.Set(M::BootClassPath, boot_class_path_string);
    588   }
    589 
    590   {
    591     auto&& boot_class_path = args.GetOrDefault(M::BootClassPath);
    592     auto&& boot_class_path_locations = args.GetOrDefault(M::BootClassPathLocations);
    593     if (args.Exists(M::BootClassPathLocations)) {
    594       size_t boot_class_path_count = ParseStringList<':'>::Split(boot_class_path).Size();
    595 
    596       if (boot_class_path_count != boot_class_path_locations.Size()) {
    597         Usage("The number of boot class path files does not match"
    598             " the number of boot class path locations given\n"
    599             "  boot class path files     (%zu): %s\n"
    600             "  boot class path locations (%zu): %s\n",
    601             boot_class_path.size(), boot_class_path_string.c_str(),
    602             boot_class_path_locations.Size(), boot_class_path_locations.Join().c_str());
    603         return false;
    604       }
    605     }
    606   }
    607 
    608   if (!args.Exists(M::CompilerCallbacksPtr) && !args.Exists(M::Image)) {
    609     std::string image = GetAndroidRoot();
    610     image += "/framework/boot.art";
    611     args.Set(M::Image, image);
    612   }
    613 
    614   // 0 means no growth limit, and growth limit should be always <= heap size
    615   if (args.GetOrDefault(M::HeapGrowthLimit) <= 0u ||
    616       args.GetOrDefault(M::HeapGrowthLimit) > args.GetOrDefault(M::MemoryMaximumSize)) {
    617     args.Set(M::HeapGrowthLimit, args.GetOrDefault(M::MemoryMaximumSize));
    618   }
    619 
    620   *runtime_options = std::move(args);
    621   return true;
    622 }
    623 
    624 void ParsedOptions::Exit(int status) {
    625   hook_exit_(status);
    626 }
    627 
    628 void ParsedOptions::Abort() {
    629   hook_abort_();
    630 }
    631 
    632 void ParsedOptions::UsageMessageV(FILE* stream, const char* fmt, va_list ap) {
    633   hook_vfprintf_(stream, fmt, ap);
    634 }
    635 
    636 void ParsedOptions::UsageMessage(FILE* stream, const char* fmt, ...) {
    637   va_list ap;
    638   va_start(ap, fmt);
    639   UsageMessageV(stream, fmt, ap);
    640   va_end(ap);
    641 }
    642 
    643 void ParsedOptions::Usage(const char* fmt, ...) {
    644   bool error = (fmt != nullptr);
    645   FILE* stream = error ? stderr : stdout;
    646 
    647   if (fmt != nullptr) {
    648     va_list ap;
    649     va_start(ap, fmt);
    650     UsageMessageV(stream, fmt, ap);
    651     va_end(ap);
    652   }
    653 
    654   const char* program = "dalvikvm";
    655   UsageMessage(stream, "%s: [options] class [argument ...]\n", program);
    656   UsageMessage(stream, "\n");
    657   UsageMessage(stream, "The following standard options are supported:\n");
    658   UsageMessage(stream, "  -classpath classpath (-cp classpath)\n");
    659   UsageMessage(stream, "  -Dproperty=value\n");
    660   UsageMessage(stream, "  -verbose:tag ('gc', 'jit', 'jni', or 'class')\n");
    661   UsageMessage(stream, "  -showversion\n");
    662   UsageMessage(stream, "  -help\n");
    663   UsageMessage(stream, "  -agentlib:jdwp=options\n");
    664   // TODO add back in once -agentlib actually does something.
    665   // UsageMessage(stream, "  -agentlib:library=options (Experimental feature, "
    666   //                      "requires -Xexperimental:agent, some features might not be supported)\n");
    667   UsageMessage(stream, "  -agentpath:library_path=options (Experimental feature, "
    668                        "requires -Xexperimental:agent, some features might not be supported)\n");
    669   UsageMessage(stream, "\n");
    670 
    671   UsageMessage(stream, "The following extended options are supported:\n");
    672   UsageMessage(stream, "  -Xrunjdwp:<options>\n");
    673   UsageMessage(stream, "  -Xbootclasspath:bootclasspath\n");
    674   UsageMessage(stream, "  -Xcheck:tag  (e.g. 'jni')\n");
    675   UsageMessage(stream, "  -XmsN (min heap, must be multiple of 1K, >= 1MB)\n");
    676   UsageMessage(stream, "  -XmxN (max heap, must be multiple of 1K, >= 2MB)\n");
    677   UsageMessage(stream, "  -XssN (stack size)\n");
    678   UsageMessage(stream, "  -Xint\n");
    679   UsageMessage(stream, "\n");
    680 
    681   UsageMessage(stream, "The following Dalvik options are supported:\n");
    682   UsageMessage(stream, "  -Xzygote\n");
    683   UsageMessage(stream, "  -Xjnitrace:substring (eg NativeClass or nativeMethod)\n");
    684   UsageMessage(stream, "  -Xstacktracefile:<filename>\n");
    685   UsageMessage(stream, "  -Xgc:[no]preverify\n");
    686   UsageMessage(stream, "  -Xgc:[no]postverify\n");
    687   UsageMessage(stream, "  -XX:HeapGrowthLimit=N\n");
    688   UsageMessage(stream, "  -XX:HeapMinFree=N\n");
    689   UsageMessage(stream, "  -XX:HeapMaxFree=N\n");
    690   UsageMessage(stream, "  -XX:NonMovingSpaceCapacity=N\n");
    691   UsageMessage(stream, "  -XX:HeapTargetUtilization=doublevalue\n");
    692   UsageMessage(stream, "  -XX:ForegroundHeapGrowthMultiplier=doublevalue\n");
    693   UsageMessage(stream, "  -XX:LowMemoryMode\n");
    694   UsageMessage(stream, "  -Xprofile:{threadcpuclock,wallclock,dualclock}\n");
    695   UsageMessage(stream, "  -Xjitthreshold:integervalue\n");
    696   UsageMessage(stream, "\n");
    697 
    698   UsageMessage(stream, "The following unique to ART options are supported:\n");
    699   UsageMessage(stream, "  -Xgc:[no]preverify_rosalloc\n");
    700   UsageMessage(stream, "  -Xgc:[no]postsweepingverify_rosalloc\n");
    701   UsageMessage(stream, "  -Xgc:[no]postverify_rosalloc\n");
    702   UsageMessage(stream, "  -Xgc:[no]presweepingverify\n");
    703   UsageMessage(stream, "  -Ximage:filename\n");
    704   UsageMessage(stream, "  -Xbootclasspath-locations:bootclasspath\n"
    705                        "     (override the dex locations of the -Xbootclasspath files)\n");
    706   UsageMessage(stream, "  -XX:+DisableExplicitGC\n");
    707   UsageMessage(stream, "  -XX:ParallelGCThreads=integervalue\n");
    708   UsageMessage(stream, "  -XX:ConcGCThreads=integervalue\n");
    709   UsageMessage(stream, "  -XX:MaxSpinsBeforeThinLockInflation=integervalue\n");
    710   UsageMessage(stream, "  -XX:LongPauseLogThreshold=integervalue\n");
    711   UsageMessage(stream, "  -XX:LongGCLogThreshold=integervalue\n");
    712   UsageMessage(stream, "  -XX:ThreadSuspendTimeout=integervalue\n");
    713   UsageMessage(stream, "  -XX:DumpGCPerformanceOnShutdown\n");
    714   UsageMessage(stream, "  -XX:DumpJITInfoOnShutdown\n");
    715   UsageMessage(stream, "  -XX:IgnoreMaxFootprint\n");
    716   UsageMessage(stream, "  -XX:UseTLAB\n");
    717   UsageMessage(stream, "  -XX:BackgroundGC=none\n");
    718   UsageMessage(stream, "  -XX:LargeObjectSpace={disabled,map,freelist}\n");
    719   UsageMessage(stream, "  -XX:LargeObjectThreshold=N\n");
    720   UsageMessage(stream, "  -XX:DumpNativeStackOnSigQuit=booleanvalue\n");
    721   UsageMessage(stream, "  -XX:MadviseRandomAccess:booleanvalue\n");
    722   UsageMessage(stream, "  -XX:SlowDebug={false,true}\n");
    723   UsageMessage(stream, "  -Xmethod-trace\n");
    724   UsageMessage(stream, "  -Xmethod-trace-file:filename");
    725   UsageMessage(stream, "  -Xmethod-trace-file-size:integervalue\n");
    726   UsageMessage(stream, "  -Xps-min-save-period-ms:integervalue\n");
    727   UsageMessage(stream, "  -Xps-save-resolved-classes-delay-ms:integervalue\n");
    728   UsageMessage(stream, "  -Xps-hot-startup-method-samples:integervalue\n");
    729   UsageMessage(stream, "  -Xps-min-methods-to-save:integervalue\n");
    730   UsageMessage(stream, "  -Xps-min-classes-to-save:integervalue\n");
    731   UsageMessage(stream, "  -Xps-min-notification-before-wake:integervalue\n");
    732   UsageMessage(stream, "  -Xps-max-notification-before-wake:integervalue\n");
    733   UsageMessage(stream, "  -Xps-profile-path:file-path\n");
    734   UsageMessage(stream, "  -Xcompiler:filename\n");
    735   UsageMessage(stream, "  -Xcompiler-option dex2oat-option\n");
    736   UsageMessage(stream, "  -Ximage-compiler-option dex2oat-option\n");
    737   UsageMessage(stream, "  -Xpatchoat:filename\n");
    738   UsageMessage(stream, "  -Xusejit:booleanvalue\n");
    739   UsageMessage(stream, "  -Xjitinitialsize:N\n");
    740   UsageMessage(stream, "  -Xjitmaxsize:N\n");
    741   UsageMessage(stream, "  -Xjitwarmupthreshold:integervalue\n");
    742   UsageMessage(stream, "  -Xjitosrthreshold:integervalue\n");
    743   UsageMessage(stream, "  -Xjitprithreadweight:integervalue\n");
    744   UsageMessage(stream, "  -X[no]relocate\n");
    745   UsageMessage(stream, "  -X[no]dex2oat (Whether to invoke dex2oat on the application)\n");
    746   UsageMessage(stream, "  -X[no]image-dex2oat (Whether to create and use a boot image)\n");
    747   UsageMessage(stream, "  -Xno-dex-file-fallback "
    748                        "(Don't fall back to dex files without oat files)\n");
    749   UsageMessage(stream, "  -Xplugin:<library.so> "
    750                        "(Load a runtime plugin, requires -Xexperimental:runtime-plugins)\n");
    751   UsageMessage(stream, "  -Xexperimental:runtime-plugins"
    752                        "(Enable new and experimental agent support)\n");
    753   UsageMessage(stream, "  -Xexperimental:agents"
    754                        "(Enable new and experimental agent support)\n");
    755   UsageMessage(stream, "\n");
    756 
    757   UsageMessage(stream, "The following previously supported Dalvik options are ignored:\n");
    758   UsageMessage(stream, "  -ea[:<package name>... |:<class name>]\n");
    759   UsageMessage(stream, "  -da[:<package name>... |:<class name>]\n");
    760   UsageMessage(stream, "   (-enableassertions, -disableassertions)\n");
    761   UsageMessage(stream, "  -esa\n");
    762   UsageMessage(stream, "  -dsa\n");
    763   UsageMessage(stream, "   (-enablesystemassertions, -disablesystemassertions)\n");
    764   UsageMessage(stream, "  -Xverify:{none,remote,all,softfail}\n");
    765   UsageMessage(stream, "  -Xrs\n");
    766   UsageMessage(stream, "  -Xint:portable, -Xint:fast, -Xint:jit\n");
    767   UsageMessage(stream, "  -Xdexopt:{none,verified,all,full}\n");
    768   UsageMessage(stream, "  -Xnoquithandler\n");
    769   UsageMessage(stream, "  -Xjniopts:{warnonly,forcecopy}\n");
    770   UsageMessage(stream, "  -Xjnigreflimit:integervalue\n");
    771   UsageMessage(stream, "  -Xgc:[no]precise\n");
    772   UsageMessage(stream, "  -Xgc:[no]verifycardtable\n");
    773   UsageMessage(stream, "  -X[no]genregmap\n");
    774   UsageMessage(stream, "  -Xverifyopt:[no]checkmon\n");
    775   UsageMessage(stream, "  -Xcheckdexsum\n");
    776   UsageMessage(stream, "  -Xincludeselectedop\n");
    777   UsageMessage(stream, "  -Xjitop:hexopvalue[-endvalue][,hexopvalue[-endvalue]]*\n");
    778   UsageMessage(stream, "  -Xincludeselectedmethod\n");
    779   UsageMessage(stream, "  -Xjitblocking\n");
    780   UsageMessage(stream, "  -Xjitmethod:signature[,signature]* (eg Ljava/lang/String\\;replace)\n");
    781   UsageMessage(stream, "  -Xjitclass:classname[,classname]*\n");
    782   UsageMessage(stream, "  -Xjitcodecachesize:N\n");
    783   UsageMessage(stream, "  -Xjitoffset:offset[,offset]\n");
    784   UsageMessage(stream, "  -Xjitconfig:filename\n");
    785   UsageMessage(stream, "  -Xjitcheckcg\n");
    786   UsageMessage(stream, "  -Xjitverbose\n");
    787   UsageMessage(stream, "  -Xjitprofile\n");
    788   UsageMessage(stream, "  -Xjitdisableopt\n");
    789   UsageMessage(stream, "  -Xjitsuspendpoll\n");
    790   UsageMessage(stream, "  -XX:mainThreadStackSize=N\n");
    791   UsageMessage(stream, "\n");
    792 
    793   Exit((error) ? 1 : 0);
    794 }
    795 
    796 }  // namespace art
    797