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This commit is contained in:
Vladimir Kozlov 2013-09-05 11:04:39 -07:00
commit 1a700c9216
1322 changed files with 52051 additions and 19966 deletions
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224
hotspot/src/share/vm/memory/universe.cpp
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@ -105,10 +105,9 @@ objArrayOop Universe::_the_empty_class_klass_array = NULL;
Array<Klass*>* Universe::_the_array_interfaces_array = NULL;
oop Universe::_the_null_string = NULL;
oop Universe::_the_min_jint_string = NULL;
LatestMethodOopCache* Universe::_finalizer_register_cache = NULL;
LatestMethodOopCache* Universe::_loader_addClass_cache = NULL;
LatestMethodOopCache* Universe::_pd_implies_cache = NULL;
ActiveMethodOopsCache* Universe::_reflect_invoke_cache = NULL;
LatestMethodCache* Universe::_finalizer_register_cache = NULL;
LatestMethodCache* Universe::_loader_addClass_cache = NULL;
LatestMethodCache* Universe::_pd_implies_cache = NULL;
oop Universe::_out_of_memory_error_java_heap = NULL;
oop Universe::_out_of_memory_error_metaspace = NULL;
oop Universe::_out_of_memory_error_class_metaspace = NULL;
@ -146,8 +145,6 @@ NarrowPtrStruct Universe::_narrow_oop = { NULL, 0, true };
NarrowPtrStruct Universe::_narrow_klass = { NULL, 0, true };
address Universe::_narrow_ptrs_base;
size_t Universe::_class_metaspace_size;
void Universe::basic_type_classes_do(void f(Klass*)) {
f(boolArrayKlassObj());
f(byteArrayKlassObj());
@ -225,7 +222,6 @@ void Universe::serialize(SerializeClosure* f, bool do_all) {
f->do_ptr((void**)&_the_empty_klass_array);
_finalizer_register_cache->serialize(f);
_loader_addClass_cache->serialize(f);
_reflect_invoke_cache->serialize(f);
_pd_implies_cache->serialize(f);
}
@ -643,16 +639,17 @@ jint universe_init() {
return status;
}
Metaspace::global_initialize();
// Create memory for metadata. Must be after initializing heap for
// DumpSharedSpaces.
ClassLoaderData::init_null_class_loader_data();
// We have a heap so create the Method* caches before
// Metaspace::initialize_shared_spaces() tries to populate them.
Universe::_finalizer_register_cache = new LatestMethodOopCache();
Universe::_loader_addClass_cache = new LatestMethodOopCache();
Universe::_pd_implies_cache = new LatestMethodOopCache();
Universe::_reflect_invoke_cache = new ActiveMethodOopsCache();
Universe::_finalizer_register_cache = new LatestMethodCache();
Universe::_loader_addClass_cache = new LatestMethodCache();
Universe::_pd_implies_cache = new LatestMethodCache();
if (UseSharedSpaces) {
// Read the data structures supporting the shared spaces (shared
@ -684,25 +681,27 @@ static const uint64_t NarrowOopHeapMax = (uint64_t(max_juint) + 1);
// 32Gb
// OopEncodingHeapMax == NarrowOopHeapMax << LogMinObjAlignmentInBytes;
char* Universe::preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode) {
char* Universe::preferred_heap_base(size_t heap_size, size_t alignment, NARROW_OOP_MODE mode) {
assert(is_size_aligned((size_t)OopEncodingHeapMax, alignment), "Must be");
assert(is_size_aligned((size_t)NarrowOopHeapMax, alignment), "Must be");
assert(is_size_aligned(heap_size, alignment), "Must be");
uintx heap_base_min_address_aligned = align_size_up(HeapBaseMinAddress, alignment);
size_t base = 0;
#ifdef _LP64
if (UseCompressedOops) {
assert(mode == UnscaledNarrowOop ||
mode == ZeroBasedNarrowOop ||
mode == HeapBasedNarrowOop, "mode is invalid");
const size_t total_size = heap_size + HeapBaseMinAddress;
const size_t total_size = heap_size + heap_base_min_address_aligned;
// Return specified base for the first request.
if (!FLAG_IS_DEFAULT(HeapBaseMinAddress) && (mode == UnscaledNarrowOop)) {
base = HeapBaseMinAddress;
base = heap_base_min_address_aligned;
// If the total size and the metaspace size are small enough to allow
// UnscaledNarrowOop then just use UnscaledNarrowOop.
} else if ((total_size <= OopEncodingHeapMax) && (mode != HeapBasedNarrowOop) &&
(!UseCompressedKlassPointers ||
(((OopEncodingHeapMax - heap_size) + Universe::class_metaspace_size()) <= KlassEncodingMetaspaceMax))) {
// We don't need to check the metaspace size here because it is always smaller
// than total_size.
// If the total size is small enough to allow UnscaledNarrowOop then
// just use UnscaledNarrowOop.
} else if ((total_size <= OopEncodingHeapMax) && (mode != HeapBasedNarrowOop)) {
if ((total_size <= NarrowOopHeapMax) && (mode == UnscaledNarrowOop) &&
(Universe::narrow_oop_shift() == 0)) {
// Use 32-bits oops without encoding and
@ -719,13 +718,6 @@ char* Universe::preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode) {
base = (OopEncodingHeapMax - heap_size);
}
}
// See if ZeroBaseNarrowOop encoding will work for a heap based at
// (KlassEncodingMetaspaceMax - class_metaspace_size()).
} else if (UseCompressedKlassPointers && (mode != HeapBasedNarrowOop) &&
(Universe::class_metaspace_size() + HeapBaseMinAddress <= KlassEncodingMetaspaceMax) &&
(KlassEncodingMetaspaceMax + heap_size - Universe::class_metaspace_size() <= OopEncodingHeapMax)) {
base = (KlassEncodingMetaspaceMax - Universe::class_metaspace_size());
} else {
// UnscaledNarrowOop encoding didn't work, and no base was found for ZeroBasedOops or
// HeapBasedNarrowOop encoding was requested. So, can't reserve below 32Gb.
@ -735,8 +727,7 @@ char* Universe::preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode) {
// Set narrow_oop_base and narrow_oop_use_implicit_null_checks
// used in ReservedHeapSpace() constructors.
// The final values will be set in initialize_heap() below.
if ((base != 0) && ((base + heap_size) <= OopEncodingHeapMax) &&
(!UseCompressedKlassPointers || (base + Universe::class_metaspace_size()) <= KlassEncodingMetaspaceMax)) {
if ((base != 0) && ((base + heap_size) <= OopEncodingHeapMax)) {
// Use zero based compressed oops
Universe::set_narrow_oop_base(NULL);
// Don't need guard page for implicit checks in indexed
@ -757,6 +748,8 @@ char* Universe::preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode) {
}
}
#endif
assert(is_ptr_aligned((char*)base, alignment), "Must be");
return (char*)base; // also return NULL (don't care) for 32-bit VM
}
@ -819,9 +812,7 @@ jint Universe::initialize_heap() {
tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB",
Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M);
}
if (((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax) ||
(UseCompressedKlassPointers &&
((uint64_t)Universe::heap()->base() + Universe::class_metaspace_size() > KlassEncodingMetaspaceMax))) {
if (((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax)) {
// Can't reserve heap below 32Gb.
// keep the Universe::narrow_oop_base() set in Universe::reserve_heap()
Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
@ -857,20 +848,16 @@ jint Universe::initialize_heap() {
}
}
}
if (verbose) {
tty->cr();
tty->cr();
}
if (UseCompressedKlassPointers) {
Universe::set_narrow_klass_base(Universe::narrow_oop_base());
Universe::set_narrow_klass_shift(MIN2(Universe::narrow_oop_shift(), LogKlassAlignmentInBytes));
}
Universe::set_narrow_ptrs_base(Universe::narrow_oop_base());
}
// Universe::narrow_oop_base() is one page below the metaspace
// base. The actual metaspace base depends on alignment constraints
// so we don't know its exact location here.
assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() - os::vm_page_size() - ClassMetaspaceSize) ||
// Universe::narrow_oop_base() is one page below the heap.
assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() -
os::vm_page_size()) ||
Universe::narrow_oop_base() == NULL, "invalid value");
assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes ||
Universe::narrow_oop_shift() == 0, "invalid value");
@ -890,35 +877,36 @@ jint Universe::initialize_heap() {
// Reserve the Java heap, which is now the same for all GCs.
ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) {
// Add in the class metaspace area so the classes in the headers can
// be compressed the same as instances.
// Need to round class space size up because it's below the heap and
// the actual alignment depends on its size.
Universe::set_class_metaspace_size(align_size_up(ClassMetaspaceSize, alignment));
size_t total_reserved = align_size_up(heap_size + Universe::class_metaspace_size(), alignment);
size_t total_reserved = align_size_up(heap_size, alignment);
assert(!UseCompressedOops || (total_reserved <= (OopEncodingHeapMax - os::vm_page_size())),
"heap size is too big for compressed oops");
char* addr = Universe::preferred_heap_base(total_reserved, Universe::UnscaledNarrowOop);
ReservedHeapSpace total_rs(total_reserved, alignment, UseLargePages, addr);
bool use_large_pages = UseLargePages && is_size_aligned(alignment, os::large_page_size());
assert(!UseLargePages
|| UseParallelOldGC
|| use_large_pages, "Wrong alignment to use large pages");
char* addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::UnscaledNarrowOop);
ReservedHeapSpace total_rs(total_reserved, alignment, use_large_pages, addr);
if (UseCompressedOops) {
if (addr != NULL && !total_rs.is_reserved()) {
// Failed to reserve at specified address - the requested memory
// region is taken already, for example, by 'java' launcher.
// Try again to reserver heap higher.
addr = Universe::preferred_heap_base(total_reserved, Universe::ZeroBasedNarrowOop);
addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::ZeroBasedNarrowOop);
ReservedHeapSpace total_rs0(total_reserved, alignment,
UseLargePages, addr);
use_large_pages, addr);
if (addr != NULL && !total_rs0.is_reserved()) {
// Failed to reserve at specified address again - give up.
addr = Universe::preferred_heap_base(total_reserved, Universe::HeapBasedNarrowOop);
addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::HeapBasedNarrowOop);
assert(addr == NULL, "");
ReservedHeapSpace total_rs1(total_reserved, alignment,
UseLargePages, addr);
use_large_pages, addr);
total_rs = total_rs1;
} else {
total_rs = total_rs0;
@ -931,28 +919,17 @@ ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) {
return total_rs;
}
// Split the reserved space into main Java heap and a space for
// classes so that they can be compressed using the same algorithm
// as compressed oops. If compress oops and compress klass ptrs are
// used we need the meta space first: if the alignment used for
// compressed oops is greater than the one used for compressed klass
// ptrs, a metadata space on top of the heap could become
// unreachable.
ReservedSpace class_rs = total_rs.first_part(Universe::class_metaspace_size());
ReservedSpace heap_rs = total_rs.last_part(Universe::class_metaspace_size(), alignment);
Metaspace::initialize_class_space(class_rs);
if (UseCompressedOops) {
// Universe::initialize_heap() will reset this to NULL if unscaled
// or zero-based narrow oops are actually used.
address base = (address)(total_rs.base() - os::vm_page_size());
Universe::set_narrow_oop_base(base);
}
return heap_rs;
return total_rs;
}
// It's the caller's repsonsibility to ensure glitch-freedom
// It's the caller's responsibility to ensure glitch-freedom
// (if required).
void Universe::update_heap_info_at_gc() {
_heap_capacity_at_last_gc = heap()->capacity();
@ -1093,35 +1070,21 @@ bool universe_post_init() {
vmSymbols::register_method_name(),
vmSymbols::register_method_signature());
if (m == NULL || !m->is_static()) {
THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(),
"java.lang.ref.Finalizer.register", false);
tty->print_cr("Unable to link/verify Finalizer.register method");
return false; // initialization failed (cannot throw exception yet)
}
Universe::_finalizer_register_cache->init(
SystemDictionary::Finalizer_klass(), m, CHECK_false);
// Resolve on first use and initialize class.
// Note: No race-condition here, since a resolve will always return the same result
// Setup method for security checks
k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_reflect_Method(), true, CHECK_false);
k_h = instanceKlassHandle(THREAD, k);
k_h->link_class(CHECK_false);
m = k_h->find_method(vmSymbols::invoke_name(), vmSymbols::object_object_array_object_signature());
if (m == NULL || m->is_static()) {
THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(),
"java.lang.reflect.Method.invoke", false);
}
Universe::_reflect_invoke_cache->init(k_h(), m, CHECK_false);
SystemDictionary::Finalizer_klass(), m);
// Setup method for registering loaded classes in class loader vector
InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false);
m = InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->find_method(vmSymbols::addClass_name(), vmSymbols::class_void_signature());
if (m == NULL || m->is_static()) {
THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(),
"java.lang.ClassLoader.addClass", false);
tty->print_cr("Unable to link/verify ClassLoader.addClass method");
return false; // initialization failed (cannot throw exception yet)
}
Universe::_loader_addClass_cache->init(
SystemDictionary::ClassLoader_klass(), m, CHECK_false);
SystemDictionary::ClassLoader_klass(), m);
// Setup method for checking protection domain
InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())->link_class(CHECK_false);
@ -1137,7 +1100,7 @@ bool universe_post_init() {
return false; // initialization failed
}
Universe::_pd_implies_cache->init(
SystemDictionary::ProtectionDomain_klass(), m, CHECK_false);;
SystemDictionary::ProtectionDomain_klass(), m);;
}
// The folowing is initializing converter functions for serialization in
@ -1157,6 +1120,8 @@ bool universe_post_init() {
// Initialize performance counters for metaspaces
MetaspaceCounters::initialize_performance_counters();
CompressedClassSpaceCounters::initialize_performance_counters();
MemoryService::add_metaspace_memory_pools();
GC_locker::unlock(); // allow gc after bootstrapping
@ -1460,7 +1425,7 @@ void Universe::compute_verify_oop_data() {
}
void CommonMethodOopCache::init(Klass* k, Method* m, TRAPS) {
void LatestMethodCache::init(Klass* k, Method* m) {
if (!UseSharedSpaces) {
_klass = k;
}
@ -1476,88 +1441,7 @@ void CommonMethodOopCache::init(Klass* k, Method* m, TRAPS) {
}
ActiveMethodOopsCache::~ActiveMethodOopsCache() {
if (_prev_methods != NULL) {
delete _prev_methods;
_prev_methods = NULL;
}
}
void ActiveMethodOopsCache::add_previous_version(Method* method) {
assert(Thread::current()->is_VM_thread(),
"only VMThread can add previous versions");
// Only append the previous method if it is executing on the stack.
if (method->on_stack()) {
if (_prev_methods == NULL) {
// This is the first previous version so make some space.
// Start with 2 elements under the assumption that the class
// won't be redefined much.
_prev_methods = new (ResourceObj::C_HEAP, mtClass) GrowableArray<Method*>(2, true);
}
// RC_TRACE macro has an embedded ResourceMark
RC_TRACE(0x00000100,
("add: %s(%s): adding prev version ref for cached method @%d",
method->name()->as_C_string(), method->signature()->as_C_string(),
_prev_methods->length()));
_prev_methods->append(method);
}
// Since the caller is the VMThread and we are at a safepoint, this is a good
// time to clear out unused method references.
if (_prev_methods == NULL) return;
for (int i = _prev_methods->length() - 1; i >= 0; i--) {
Method* method = _prev_methods->at(i);
assert(method != NULL, "weak method ref was unexpectedly cleared");
if (!method->on_stack()) {
// This method isn't running anymore so remove it
_prev_methods->remove_at(i);
MetadataFactory::free_metadata(method->method_holder()->class_loader_data(), method);
} else {
// RC_TRACE macro has an embedded ResourceMark
RC_TRACE(0x00000400,
("add: %s(%s): previous cached method @%d is alive",
method->name()->as_C_string(), method->signature()->as_C_string(), i));
}
}
} // end add_previous_version()
bool ActiveMethodOopsCache::is_same_method(const Method* method) const {
InstanceKlass* ik = InstanceKlass::cast(klass());
const Method* check_method = ik->method_with_idnum(method_idnum());
assert(check_method != NULL, "sanity check");
if (check_method == method) {
// done with the easy case
return true;
}
if (_prev_methods != NULL) {
// The cached method has been redefined at least once so search
// the previous versions for a match.
for (int i = 0; i < _prev_methods->length(); i++) {
check_method = _prev_methods->at(i);
if (check_method == method) {
// a previous version matches
return true;
}
}
}
// either no previous versions or no previous version matched
return false;
}
Method* LatestMethodOopCache::get_Method() {
Method* LatestMethodCache::get_method() {
if (klass() == NULL) return NULL;
InstanceKlass* ik = InstanceKlass::cast(klass());
Method* m = ik->method_with_idnum(method_idnum());