blob: 0e5da23240f98c404f51216195ec2334a0fe8b93 [file] [log] [blame]
// Copyright 2011 Google Inc. All Rights Reserved.
#include "runtime.h"
#include <cstdio>
#include <cstdlib>
#include <limits>
#include <vector>
#include "UniquePtr.h"
#include "class_linker.h"
#include "heap.h"
#include "intern_table.h"
#include "jni_internal.h"
#include "signal_catcher.h"
#include "thread.h"
// TODO: this drags in cutil/log.h, which conflicts with our logging.h.
#include "JniConstants.h"
namespace art {
Runtime* Runtime::instance_ = NULL;
Runtime::~Runtime() {
// TODO: use smart pointers instead. (we'll need the pimpl idiom.)
delete class_linker_;
Heap::Destroy();
delete signal_catcher_;
delete thread_list_;
delete intern_table_;
delete java_vm_;
Thread::Shutdown();
// TODO: acquire a static mutex on Runtime to avoid racing.
CHECK(instance_ == NULL || instance_ == this);
instance_ = NULL;
}
void Runtime::Abort(const char* file, int line) {
// Get any pending output out of the way.
fflush(NULL);
// Many people have difficulty distinguish aborts from crashes,
// so be explicit.
LogMessage(file, line, ERROR, -1).stream() << "Runtime aborting...";
// Perform any platform-specific pre-abort actions.
PlatformAbort(file, line);
// use abort hook if we have one
if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) {
Runtime::Current()->abort_();
// notreached
}
// If we call abort(3) on a device, all threads in the process
// receive SIGABRT. debuggerd dumps the stack trace of the main
// thread, whether or not that was the thread that failed. By
// stuffing a value into a bogus address, we cause a segmentation
// fault in the current thread, and get a useful log from debuggerd.
// We can also trivially tell the difference between a VM crash and
// a deliberate abort by looking at the fault address.
*reinterpret_cast<char*>(0xdeadd00d) = 38;
abort();
// notreached
}
void Runtime::CallExitHook(jint status) {
if (exit_ != NULL) {
ScopedThreadStateChange tsc(Thread::Current(), Thread::kNative);
exit_(status);
LOG(WARNING) << "Exit hook returned instead of exiting!";
}
}
// Parse a string of the form /[0-9]+[kKmMgG]?/, which is used to specify
// memory sizes. [kK] indicates kilobytes, [mM] megabytes, and
// [gG] gigabytes.
//
// "s" should point just past the "-Xm?" part of the string.
// "div" specifies a divisor, e.g. 1024 if the value must be a multiple
// of 1024.
//
// The spec says the -Xmx and -Xms options must be multiples of 1024. It
// doesn't say anything about -Xss.
//
// Returns 0 (a useless size) if "s" is malformed or specifies a low or
// non-evenly-divisible value.
//
size_t ParseMemoryOption(const char *s, size_t div) {
// strtoul accepts a leading [+-], which we don't want,
// so make sure our string starts with a decimal digit.
if (isdigit(*s)) {
const char *s2;
size_t val = strtoul(s, (char **)&s2, 10);
if (s2 != s) {
// s2 should be pointing just after the number.
// If this is the end of the string, the user
// has specified a number of bytes. Otherwise,
// there should be exactly one more character
// that specifies a multiplier.
if (*s2 != '\0') {
// The remainder of the string is either a single multiplier
// character, or nothing to indicate that the value is in
// bytes.
char c = *s2++;
if (*s2 == '\0') {
size_t mul;
if (c == '\0') {
mul = 1;
} else if (c == 'k' || c == 'K') {
mul = KB;
} else if (c == 'm' || c == 'M') {
mul = MB;
} else if (c == 'g' || c == 'G') {
mul = GB;
} else {
// Unknown multiplier character.
return 0;
}
if (val <= std::numeric_limits<size_t>::max() / mul) {
val *= mul;
} else {
// Clamp to a multiple of 1024.
val = std::numeric_limits<size_t>::max() & ~(1024-1);
}
} else {
// There's more than one character after the numeric part.
return 0;
}
}
// The man page says that a -Xm value must be a multiple of 1024.
if (val % div == 0) {
return val;
}
}
}
return 0;
}
void LoadJniLibrary(JavaVMExt* vm, const char* name) {
// TODO: OS_SHARED_LIB_FORMAT_STR
std::string mapped_name(StringPrintf("lib%s.so", name));
std::string reason;
if (!vm->LoadNativeLibrary(mapped_name, NULL, reason)) {
LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": "
<< reason;
}
}
const DexFile* Open(const std::string& filename) {
if (filename.size() < 4) {
LOG(WARNING) << "Ignoring short classpath entry '" << filename << "'";
return NULL;
}
std::string suffix(filename.substr(filename.size() - 4));
if (suffix == ".zip" || suffix == ".jar" || suffix == ".apk") {
return DexFile::OpenZip(filename);
} else {
return DexFile::OpenFile(filename);
}
}
void CreateBootClassPath(const char* boot_class_path_cstr,
std::vector<const DexFile*>& boot_class_path_vector) {
CHECK(boot_class_path_cstr != NULL);
std::vector<std::string> parsed;
Split(boot_class_path_cstr, ':', parsed);
for (size_t i = 0; i < parsed.size(); ++i) {
const DexFile* dex_file = Open(parsed[i]);
if (dex_file != NULL) {
boot_class_path_vector.push_back(dex_file);
}
}
}
Runtime::ParsedOptions* Runtime::ParsedOptions::Create(const Options& options, bool ignore_unrecognized) {
UniquePtr<ParsedOptions> parsed(new ParsedOptions());
const char* boot_class_path = getenv("BOOTCLASSPATH");
parsed->boot_image_ = NULL;
#ifdef NDEBUG
// -Xcheck:jni is off by default for regular builds...
parsed->check_jni_ = false;
#else
// ...but on by default in debug builds.
parsed->check_jni_ = true;
#endif
parsed->heap_initial_size_ = Heap::kInitialSize;
parsed->heap_maximum_size_ = Heap::kMaximumSize;
parsed->stack_size_ = Thread::kDefaultStackSize;
parsed->hook_vfprintf_ = vfprintf;
parsed->hook_exit_ = exit;
parsed->hook_abort_ = abort;
for (size_t i = 0; i < options.size(); ++i) {
const StringPiece& option = options[i].first;
if (option.starts_with("-Xbootclasspath:")) {
boot_class_path = option.substr(strlen("-Xbootclasspath:")).data();
} else if (option == "bootclasspath") {
const void* dex_vector = options[i].second;
const std::vector<const DexFile*>* v
= reinterpret_cast<const std::vector<const DexFile*>*>(dex_vector);
if (v == NULL) {
if (ignore_unrecognized) {
continue;
}
// TODO: usage
LOG(FATAL) << "Could not parse " << option;
return NULL;
}
parsed->boot_class_path_ = *v;
} else if (option.starts_with("-Xbootimage:")) {
parsed->boot_image_ = option.substr(strlen("-Xbootimage:")).data();
} else if (option.starts_with("-Xcheck:jni")) {
parsed->check_jni_ = true;
} else if (option.starts_with("-Xms")) {
size_t size = ParseMemoryOption(option.substr(strlen("-Xms")).data(), 1024);
if (size == 0) {
if (ignore_unrecognized) {
continue;
}
// TODO: usage
LOG(FATAL) << "Could not parse " << option;
return NULL;
}
parsed->heap_initial_size_ = size;
} else if (option.starts_with("-Xmx")) {
size_t size = ParseMemoryOption(option.substr(strlen("-Xmx")).data(), 1024);
if (size == 0) {
if (ignore_unrecognized) {
continue;
}
// TODO: usage
LOG(FATAL) << "Could not parse " << option;
return NULL;
}
parsed->heap_maximum_size_ = size;
} else if (option.starts_with("-Xss")) {
size_t size = ParseMemoryOption(option.substr(strlen("-Xss")).data(), 1);
if (size == 0) {
if (ignore_unrecognized) {
continue;
}
// TODO: usage
LOG(FATAL) << "Could not parse " << option;
return NULL;
}
parsed->stack_size_ = size;
} else if (option.starts_with("-D")) {
parsed->properties_.push_back(option.substr(strlen("-D")).data());
} else if (option.starts_with("-verbose:")) {
std::vector<std::string> verbose_options;
Split(option.substr(strlen("-verbose:")).data(), ',', verbose_options);
for (size_t i = 0; i < verbose_options.size(); ++i) {
parsed->verbose_.insert(verbose_options[i]);
}
} else if (option == "vfprintf") {
parsed->hook_vfprintf_ = reinterpret_cast<int (*)(FILE *, const char*, va_list)>(options[i].second);
} else if (option == "exit") {
parsed->hook_exit_ = reinterpret_cast<void(*)(jint)>(options[i].second);
} else if (option == "abort") {
parsed->hook_abort_ = reinterpret_cast<void(*)()>(options[i].second);
} else {
if (!ignore_unrecognized) {
// TODO: print usage via vfprintf
LOG(FATAL) << "Unrecognized option " << option;
return NULL;
}
}
}
if (boot_class_path == NULL) {
boot_class_path = "";
}
if (parsed->boot_class_path_.size() == 0) {
CreateBootClassPath(boot_class_path, parsed->boot_class_path_);
}
return parsed.release();
}
Runtime* Runtime::Create(const std::vector<const DexFile*>& boot_class_path) {
Runtime::Options options;
options.push_back(std::make_pair("bootclasspath", &boot_class_path));
return Runtime::Create(options, false);
}
Runtime* Runtime::Create(const Options& options, bool ignore_unrecognized) {
// TODO: acquire a static mutex on Runtime to avoid racing.
if (Runtime::instance_ != NULL) {
return NULL;
}
UniquePtr<Runtime> runtime(new Runtime());
bool success = runtime->Init(options, ignore_unrecognized);
if (!success) {
return NULL;
}
instance_ = runtime.release();
instance_->InitLibraries();
instance_->signal_catcher_ = new SignalCatcher;
return instance_;
}
bool Runtime::Init(const Options& raw_options, bool ignore_unrecognized) {
CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
UniquePtr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized));
if (options.get() == NULL) {
return false;
}
vfprintf_ = options->hook_vfprintf_;
exit_ = options->hook_exit_;
abort_ = options->hook_abort_;
stack_size_ = options->stack_size_;
thread_list_ = ThreadList::Create();
intern_table_ = new InternTable;
if (!Heap::Init(options->heap_initial_size_,
options->heap_maximum_size_,
options->boot_image_)) {
return false;
}
BlockSignals();
bool verbose_jni = options->verbose_.find("jni") != options->verbose_.end();
java_vm_ = new JavaVMExt(this, options->check_jni_, verbose_jni);
if (!Thread::Startup()) {
return false;
}
Thread* current_thread = Thread::Attach(this);
thread_list_->Register(current_thread);
class_linker_ = ClassLinker::Create(options->boot_class_path_, intern_table_, Heap::GetBootSpace());
return true;
}
void Runtime::InitLibraries() {
Thread* self = Thread::Current();
JNIEnv* env = self->GetJniEnv();
// Must be in the kNative state for JNI-based method registration.
ScopedThreadStateChange tsc(self, Thread::kNative);
// First set up the native methods provided by the runtime itself.
RegisterRuntimeNativeMethods(env);
// Now set up libcore, which is just a JNI library with a JNI_OnLoad.
// Most JNI libraries can just use System.loadLibrary, but you can't
// if you're the library that implements System.loadLibrary!
JniConstants::init(env);
LoadJniLibrary(instance_->GetJavaVM(), "javacore");
}
void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) {
#define REGISTER(FN) extern void FN(JNIEnv*); FN(env)
//REGISTER(register_dalvik_bytecode_OpcodeInfo);
//REGISTER(register_dalvik_system_DexFile);
//REGISTER(register_dalvik_system_VMDebug);
//REGISTER(register_dalvik_system_VMRuntime);
//REGISTER(register_dalvik_system_VMStack);
//REGISTER(register_dalvik_system_Zygote);
//REGISTER(register_java_lang_Class);
REGISTER(register_java_lang_Object);
REGISTER(register_java_lang_Runtime);
REGISTER(register_java_lang_String);
REGISTER(register_java_lang_System);
//REGISTER(register_java_lang_Thread);
//REGISTER(register_java_lang_Throwable);
//REGISTER(register_java_lang_VMClassLoader);
//REGISTER(register_java_lang_reflect_AccessibleObject);
//REGISTER(register_java_lang_reflect_Array);
//REGISTER(register_java_lang_reflect_Constructor);
//REGISTER(register_java_lang_reflect_Field);
//REGISTER(register_java_lang_reflect_Method);
//REGISTER(register_java_lang_reflect_Proxy);
REGISTER(register_java_util_concurrent_atomic_AtomicLong);
//REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer);
//REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal);
//REGISTER(register_sun_misc_Unsafe);
#undef REGISTER
}
void Runtime::DumpStatistics(std::ostream& os) {
// TODO: dump other runtime statistics?
os << "Loaded classes: " << class_linker_->NumLoadedClasses() << "\n";
os << "Intern table size: " << GetInternTable()->Size() << "\n";
// LOGV("VM stats: meth=%d ifld=%d sfld=%d linear=%d",
// gDvm.numDeclaredMethods,
// gDvm.numDeclaredInstFields,
// gDvm.numDeclaredStaticFields,
// gDvm.pBootLoaderAlloc->curOffset);
// LOGI("GC precise methods: %d", dvmPointerSetGetCount(gDvm.preciseMethods));
}
void Runtime::BlockSignals() {
sigset_t sigset;
if (sigemptyset(&sigset) == -1) {
PLOG(FATAL) << "sigemptyset failed";
}
if (sigaddset(&sigset, SIGPIPE) == -1) {
PLOG(ERROR) << "sigaddset SIGPIPE failed";
}
// SIGQUIT is used to dump the runtime's state (including stack traces).
if (sigaddset(&sigset, SIGQUIT) == -1) {
PLOG(ERROR) << "sigaddset SIGQUIT failed";
}
// SIGUSR1 is used to initiate a heap dump.
if (sigaddset(&sigset, SIGUSR1) == -1) {
PLOG(ERROR) << "sigaddset SIGUSR1 failed";
}
CHECK_EQ(sigprocmask(SIG_BLOCK, &sigset, NULL), 0);
}
bool Runtime::AttachCurrentThread(const char* name, JNIEnv** penv, bool as_daemon) {
if (as_daemon) {
UNIMPLEMENTED(WARNING) << "TODO: do something different for daemon threads";
}
return Thread::Attach(instance_) != NULL;
}
bool Runtime::DetachCurrentThread() {
Thread* self = Thread::Current();
thread_list_->Unregister(self);
delete self;
return true;
}
void Runtime::VisitRoots(Heap::RootVisitor* visitor, void* arg) const {
class_linker_->VisitRoots(visitor, arg);
intern_table_->VisitRoots(visitor, arg);
java_vm_->VisitRoots(visitor, arg);
thread_list_->VisitRoots(visitor, arg);
//(*visitor)(&gDvm.outOfMemoryObj, 0, ROOT_VM_INTERNAL, arg);
//(*visitor)(&gDvm.internalErrorObj, 0, ROOT_VM_INTERNAL, arg);
//(*visitor)(&gDvm.noClassDefFoundErrorObj, 0, ROOT_VM_INTERNAL, arg);
UNIMPLEMENTED(WARNING) << "some roots not marked";
}
} // namespace art