--- a/.hgtags-top-repo Fri Nov 15 07:14:23 2013 -0800
+++ b/.hgtags-top-repo Wed Jul 05 19:22:38 2017 +0200
@@ -237,3 +237,4 @@
6ba4c7cb623ec612031e05cf8bf279d8f407bd1e jdk8-b113
4f2011496393a26dcfd7b1f7787a3673ddd32599 jdk8-b114
763ada2a1d8c5962bc8c3d297e57c562d2e95338 jdk8-b115
+cbfe5da942c63ef865cab4a7159e01eff7d7fcf5 jdk8-b116
--- a/hotspot/.hgtags Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/.hgtags Wed Jul 05 19:22:38 2017 +0200
@@ -393,3 +393,5 @@
3b32d287da89a47a45d16f6d9ba5bd3cd9bf4b3e hs25-b57
9ebaac78a8a0061fb9597e07f806498cb626cdeb jdk8-b115
e510dfdec6dd701410f3398ed86ebcdff0cca63a hs25-b58
+52b076e6ffae247c1c7d8b7aba995195be2b6fc2 jdk8-b116
+c78d517c7ea47501b456e707afd4b78e7b5b202e hs25-b59
--- a/hotspot/make/hotspot_version Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/make/hotspot_version Wed Jul 05 19:22:38 2017 +0200
@@ -35,7 +35,7 @@
HS_MAJOR_VER=25
HS_MINOR_VER=0
-HS_BUILD_NUMBER=58
+HS_BUILD_NUMBER=59
JDK_MAJOR_VER=1
JDK_MINOR_VER=8
--- a/hotspot/src/cpu/sparc/vm/sharedRuntime_sparc.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/cpu/sparc/vm/sharedRuntime_sparc.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -1002,18 +1002,6 @@
// and the vm will find there should this case occur.
Address callee_target_addr(G2_thread, JavaThread::callee_target_offset());
__ st_ptr(G5_method, callee_target_addr);
-
- if (StressNonEntrant) {
- // Open a big window for deopt failure
- __ save_frame(0);
- __ mov(G0, L0);
- Label loop;
- __ bind(loop);
- __ sub(L0, 1, L0);
- __ br_null_short(L0, Assembler::pt, loop);
- __ restore();
- }
-
__ jmpl(G3, 0, G0);
__ delayed()->nop();
}
--- a/hotspot/src/share/vm/c1/c1_GraphBuilder.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/c1/c1_GraphBuilder.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -4338,6 +4338,11 @@
#endif // PRODUCT
void GraphBuilder::profile_call(ciMethod* callee, Value recv, ciKlass* known_holder, Values* obj_args, bool inlined) {
+ // A default method's holder is an interface
+ if (known_holder != NULL && known_holder->is_interface()) {
+ assert(known_holder->is_instance_klass() && ((ciInstanceKlass*)known_holder)->has_default_methods(), "should be default method");
+ known_holder = NULL;
+ }
append(new ProfileCall(method(), bci(), callee, recv, known_holder, obj_args, inlined));
}
--- a/hotspot/src/share/vm/c1/c1_LIRGenerator.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/c1/c1_LIRGenerator.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -2574,8 +2574,25 @@
__ jump(x->default_sux());
}
-
-ciKlass* LIRGenerator::profile_arg_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k, Value arg, LIR_Opr& mdp, bool not_null, ciKlass* signature_k) {
+/**
+ * Emit profiling code if needed for arguments, parameters, return value types
+ *
+ * @param md MDO the code will update at runtime
+ * @param md_base_offset common offset in the MDO for this profile and subsequent ones
+ * @param md_offset offset in the MDO (on top of md_base_offset) for this profile
+ * @param profiled_k current profile
+ * @param obj IR node for the object to be profiled
+ * @param mdp register to hold the pointer inside the MDO (md + md_base_offset).
+ * Set once we find an update to make and use for next ones.
+ * @param not_null true if we know obj cannot be null
+ * @param signature_at_call_k signature at call for obj
+ * @param callee_signature_k signature of callee for obj
+ * at call and callee signatures differ at method handle call
+ * @return the only klass we know will ever be seen at this profile point
+ */
+ciKlass* LIRGenerator::profile_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k,
+ Value obj, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
+ ciKlass* callee_signature_k) {
ciKlass* result = NULL;
bool do_null = !not_null && !TypeEntries::was_null_seen(profiled_k);
bool do_update = !TypeEntries::is_type_unknown(profiled_k);
@@ -2590,9 +2607,9 @@
if (do_update) {
// try to find exact type, using CHA if possible, so that loading
// the klass from the object can be avoided
- ciType* type = arg->exact_type();
+ ciType* type = obj->exact_type();
if (type == NULL) {
- type = arg->declared_type();
+ type = obj->declared_type();
type = comp->cha_exact_type(type);
}
assert(type == NULL || type->is_klass(), "type should be class");
@@ -2608,23 +2625,33 @@
ciKlass* exact_signature_k = NULL;
if (do_update) {
// Is the type from the signature exact (the only one possible)?
- exact_signature_k = signature_k->exact_klass();
+ exact_signature_k = signature_at_call_k->exact_klass();
if (exact_signature_k == NULL) {
- exact_signature_k = comp->cha_exact_type(signature_k);
+ exact_signature_k = comp->cha_exact_type(signature_at_call_k);
} else {
result = exact_signature_k;
- do_update = false;
// Known statically. No need to emit any code: prevent
// LIR_Assembler::emit_profile_type() from emitting useless code
profiled_k = ciTypeEntries::with_status(result, profiled_k);
}
if (exact_signature_k != NULL && exact_klass != exact_signature_k) {
- assert(exact_klass == NULL, "arg and signature disagree?");
+ assert(exact_klass == NULL, "obj and signature disagree?");
// sometimes the type of the signature is better than the best type
// the compiler has
exact_klass = exact_signature_k;
- do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
}
+ if (callee_signature_k != NULL &&
+ callee_signature_k != signature_at_call_k) {
+ ciKlass* improved_klass = callee_signature_k->exact_klass();
+ if (improved_klass == NULL) {
+ improved_klass = comp->cha_exact_type(callee_signature_k);
+ }
+ if (improved_klass != NULL && exact_klass != improved_klass) {
+ assert(exact_klass == NULL, "obj and signature disagree?");
+ exact_klass = exact_signature_k;
+ }
+ }
+ do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
}
if (!do_null && !do_update) {
@@ -2640,7 +2667,7 @@
__ leal(LIR_OprFact::address(base_type_address), mdp);
}
}
- LIRItem value(arg, this);
+ LIRItem value(obj, this);
value.load_item();
__ profile_type(new LIR_Address(mdp, md_offset, T_METADATA),
value.result(), exact_klass, profiled_k, new_pointer_register(), not_null, exact_signature_k != NULL);
@@ -2665,9 +2692,9 @@
if (t == T_OBJECT || t == T_ARRAY) {
intptr_t profiled_k = parameters->type(j);
Local* local = x->state()->local_at(java_index)->as_Local();
- ciKlass* exact = profile_arg_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
- in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)),
- profiled_k, local, mdp, false, local->declared_type()->as_klass());
+ ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
+ in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)),
+ profiled_k, local, mdp, false, local->declared_type()->as_klass(), NULL);
// If the profile is known statically set it once for all and do not emit any code
if (exact != NULL) {
md->set_parameter_type(j, exact);
@@ -3129,19 +3156,28 @@
Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
int start = 0;
int stop = data->is_CallTypeData() ? ((ciCallTypeData*)data)->number_of_arguments() : ((ciVirtualCallTypeData*)data)->number_of_arguments();
- if (x->nb_profiled_args() < stop) {
- // if called through method handle invoke, some arguments may have been popped
- stop = x->nb_profiled_args();
+ if (x->inlined() && x->callee()->is_static() && Bytecodes::has_receiver(bc)) {
+ // first argument is not profiled at call (method handle invoke)
+ assert(x->method()->raw_code_at_bci(bci) == Bytecodes::_invokehandle, "invokehandle expected");
+ start = 1;
}
- ciSignature* sig = x->callee()->signature();
+ ciSignature* callee_signature = x->callee()->signature();
// method handle call to virtual method
bool has_receiver = x->inlined() && !x->callee()->is_static() && !Bytecodes::has_receiver(bc);
- ciSignatureStream sig_stream(sig, has_receiver ? x->callee()->holder() : NULL);
- for (int i = 0; i < stop; i++) {
+ ciSignatureStream callee_signature_stream(callee_signature, has_receiver ? x->callee()->holder() : NULL);
+
+ bool ignored_will_link;
+ ciSignature* signature_at_call = NULL;
+ x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
+ ciSignatureStream signature_at_call_stream(signature_at_call);
+
+ // if called through method handle invoke, some arguments may have been popped
+ for (int i = 0; i < stop && i+start < x->nb_profiled_args(); i++) {
int off = in_bytes(TypeEntriesAtCall::argument_type_offset(i)) - in_bytes(TypeEntriesAtCall::args_data_offset());
- ciKlass* exact = profile_arg_type(md, base_offset, off,
- args->type(i), x->profiled_arg_at(i+start), mdp,
- !x->arg_needs_null_check(i+start), sig_stream.next_klass());
+ ciKlass* exact = profile_type(md, base_offset, off,
+ args->type(i), x->profiled_arg_at(i+start), mdp,
+ !x->arg_needs_null_check(i+start),
+ signature_at_call_stream.next_klass(), callee_signature_stream.next_klass());
if (exact != NULL) {
md->set_argument_type(bci, i, exact);
}
@@ -3176,8 +3212,8 @@
int bci = x->bci_of_invoke();
Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
// The first parameter is the receiver so that's what we start
- // with if it exists. On exception if method handle call to
- // virtual method has receiver in the args list
+ // with if it exists. One exception is method handle call to
+ // virtual method: the receiver is in the args list
if (arg == NULL || !Bytecodes::has_receiver(bc)) {
i = 1;
arg = x->profiled_arg_at(0);
@@ -3186,9 +3222,9 @@
int k = 0; // to iterate on the profile data
for (;;) {
intptr_t profiled_k = parameters->type(k);
- ciKlass* exact = profile_arg_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
- in_bytes(ParametersTypeData::type_offset(k)) - in_bytes(ParametersTypeData::type_offset(0)),
- profiled_k, arg, mdp, not_null, sig_stream.next_klass());
+ ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
+ in_bytes(ParametersTypeData::type_offset(k)) - in_bytes(ParametersTypeData::type_offset(0)),
+ profiled_k, arg, mdp, not_null, sig_stream.next_klass(), NULL);
// If the profile is known statically set it once for all and do not emit any code
if (exact != NULL) {
md->set_parameter_type(k, exact);
@@ -3247,9 +3283,16 @@
assert(data->is_CallTypeData() || data->is_VirtualCallTypeData(), "wrong profile data type");
ciReturnTypeEntry* ret = data->is_CallTypeData() ? ((ciCallTypeData*)data)->ret() : ((ciVirtualCallTypeData*)data)->ret();
LIR_Opr mdp = LIR_OprFact::illegalOpr;
- ciKlass* exact = profile_arg_type(md, 0, md->byte_offset_of_slot(data, ret->type_offset()),
- ret->type(), x->ret(), mdp,
- !x->needs_null_check(), x->callee()->signature()->return_type()->as_klass());
+
+ bool ignored_will_link;
+ ciSignature* signature_at_call = NULL;
+ x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
+
+ ciKlass* exact = profile_type(md, 0, md->byte_offset_of_slot(data, ret->type_offset()),
+ ret->type(), x->ret(), mdp,
+ !x->needs_null_check(),
+ signature_at_call->return_type()->as_klass(),
+ x->callee()->signature()->return_type()->as_klass());
if (exact != NULL) {
md->set_return_type(bci, exact);
}
--- a/hotspot/src/share/vm/c1/c1_LIRGenerator.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/c1/c1_LIRGenerator.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -434,7 +434,9 @@
void do_ThreadIDIntrinsic(Intrinsic* x);
void do_ClassIDIntrinsic(Intrinsic* x);
#endif
- ciKlass* profile_arg_type(ciMethodData* md, int md_first_offset, int md_offset, intptr_t profiled_k, Value arg, LIR_Opr& mdp, bool not_null, ciKlass* signature_k);
+ ciKlass* profile_type(ciMethodData* md, int md_first_offset, int md_offset, intptr_t profiled_k,
+ Value arg, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
+ ciKlass* callee_signature_k);
void profile_arguments(ProfileCall* x);
void profile_parameters(Base* x);
void profile_parameters_at_call(ProfileCall* x);
--- a/hotspot/src/share/vm/c1/c1_globals.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/c1/c1_globals.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -341,9 +341,6 @@
diagnostic(bool, C1PatchInvokeDynamic, true, \
"Patch invokedynamic appendix not known at compile time") \
\
- develop(intx, MaxForceInlineLevel, 100, \
- "maximum number of nested @ForceInline calls that are inlined") \
- \
// Read default values for c1 globals
--- a/hotspot/src/share/vm/ci/ciEnv.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/ci/ciEnv.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -935,7 +935,9 @@
// Prevent SystemDictionary::add_to_hierarchy from running
// and invalidating our dependencies until we install this method.
+ // No safepoints are allowed. Otherwise, class redefinition can occur in between.
MutexLocker ml(Compile_lock);
+ No_Safepoint_Verifier nsv;
// Change in Jvmti state may invalidate compilation.
if (!failing() &&
@@ -1001,16 +1003,6 @@
// Free codeBlobs
code_buffer->free_blob();
- // stress test 6243940 by immediately making the method
- // non-entrant behind the system's back. This has serious
- // side effects on the code cache and is not meant for
- // general stress testing
- if (nm != NULL && StressNonEntrant) {
- MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
- NativeJump::patch_verified_entry(nm->entry_point(), nm->verified_entry_point(),
- SharedRuntime::get_handle_wrong_method_stub());
- }
-
if (nm == NULL) {
// The CodeCache is full. Print out warning and disable compilation.
record_failure("code cache is full");
@@ -1036,11 +1028,11 @@
char *method_name = method->name_and_sig_as_C_string();
tty->print_cr("Replacing method %s", method_name);
}
- if (old != NULL ) {
+ if (old != NULL) {
old->make_not_entrant();
}
}
- if (TraceNMethodInstalls ) {
+ if (TraceNMethodInstalls) {
ResourceMark rm;
char *method_name = method->name_and_sig_as_C_string();
ttyLocker ttyl;
@@ -1051,7 +1043,7 @@
// Allow the code to be executed
method->set_code(method, nm);
} else {
- if (TraceNMethodInstalls ) {
+ if (TraceNMethodInstalls) {
ResourceMark rm;
char *method_name = method->name_and_sig_as_C_string();
ttyLocker ttyl;
@@ -1061,7 +1053,6 @@
entry_bci);
}
method->method_holder()->add_osr_nmethod(nm);
-
}
}
}
--- a/hotspot/src/share/vm/ci/ciMethodData.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/ci/ciMethodData.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -77,7 +77,9 @@
static ciKlass* valid_ciklass(intptr_t k) {
if (!TypeEntries::is_type_none(k) &&
!TypeEntries::is_type_unknown(k)) {
- return (ciKlass*)TypeEntries::klass_part(k);
+ ciKlass* res = (ciKlass*)TypeEntries::klass_part(k);
+ assert(res != NULL, "invalid");
+ return res;
} else {
return NULL;
}
--- a/hotspot/src/share/vm/classfile/classFileParser.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/classfile/classFileParser.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -4080,7 +4080,7 @@
// Generate any default methods - default methods are interface methods
// that have a default implementation. This is new with Lambda project.
- if (has_default_methods && !access_flags.is_interface() ) {
+ if (has_default_methods ) {
DefaultMethods::generate_default_methods(
this_klass(), &all_mirandas, CHECK_(nullHandle));
}
--- a/hotspot/src/share/vm/classfile/defaultMethods.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/classfile/defaultMethods.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -171,8 +171,12 @@
}
bool is_cancelled() const { return _cancelled; }
+ // This code used to skip interface classes because their only
+ // superclass was j.l.Object which would be also covered by class
+ // superclass hierarchy walks. Now that the starting point can be
+ // an interface, we must ensure we catch j.l.Object as the super.
static bool has_super(InstanceKlass* cls) {
- return cls->super() != NULL && !cls->is_interface();
+ return cls->super() != NULL;
}
Node* node_at_depth(int i) const {
@@ -391,16 +395,21 @@
return;
}
+ // Qualified methods are maximally-specific methods
+ // These include public, instance concrete (=default) and abstract methods
GrowableArray<Method*> qualified_methods;
int num_defaults = 0;
int default_index = -1;
+ int qualified_index = -1;
for (int i = 0; i < _members.length(); ++i) {
Pair<Method*,QualifiedState> entry = _members.at(i);
if (entry.second == QUALIFIED) {
qualified_methods.append(entry.first);
- default_index++;
+ qualified_index++;
if (entry.first->is_default_method()) {
num_defaults++;
+ default_index = qualified_index;
+
}
}
}
@@ -408,16 +417,10 @@
if (qualified_methods.length() == 0) {
_exception_message = generate_no_defaults_message(CHECK);
_exception_name = vmSymbols::java_lang_AbstractMethodError();
- } else if (qualified_methods.length() == 1) {
- // leave abstract methods alone, they will be found via normal search path
- Method* method = qualified_methods.at(0);
- if (!method->is_abstract()) {
- _selected_target = qualified_methods.at(0);
- }
- // If only one qualified method is default, select that
+ // If only one qualified method is default, select that
} else if (num_defaults == 1) {
_selected_target = qualified_methods.at(default_index);
- } else {
+ } else if (num_defaults > 1) {
_exception_message = generate_conflicts_message(&qualified_methods,CHECK);
_exception_name = vmSymbols::java_lang_IncompatibleClassChangeError();
if (TraceDefaultMethods) {
@@ -425,6 +428,7 @@
tty->print_cr("");
}
}
+ // leave abstract methods alone, they will be found via normal search path
}
bool contains_signature(Symbol* query) {
@@ -704,8 +708,10 @@
Method* m = iklass->find_method(_method_name, _method_signature);
// private interface methods are not candidates for default methods
// invokespecial to private interface methods doesn't use default method logic
+ // The overpasses are your supertypes' errors, we do not include them
// future: take access controls into account for superclass methods
- if (m != NULL && !m->is_static() && (!iklass->is_interface() || m->is_public())) {
+ if (m != NULL && !m->is_static() && !m->is_overpass() &&
+ (!iklass->is_interface() || m->is_public())) {
if (_family == NULL) {
_family = new StatefulMethodFamily();
}
@@ -781,7 +787,8 @@
#ifndef PRODUCT
if (TraceDefaultMethods) {
ResourceMark rm; // be careful with these!
- tty->print_cr("Class %s requires default method processing",
+ tty->print_cr("%s %s requires default method processing",
+ klass->is_interface() ? "Interface" : "Class",
klass->name()->as_klass_external_name());
PrintHierarchy printer;
printer.run(klass);
@@ -806,7 +813,7 @@
}
#ifndef PRODUCT
if (TraceDefaultMethods) {
- tty->print_cr("Creating overpasses...");
+ tty->print_cr("Creating defaults and overpasses...");
}
#endif // ndef PRODUCT
@@ -1076,7 +1083,9 @@
klass->set_initial_method_idnum(new_size);
ClassLoaderData* cld = klass->class_loader_data();
- MetadataFactory::free_array(cld, original_methods);
+ if (original_methods ->length() > 0) {
+ MetadataFactory::free_array(cld, original_methods);
+ }
if (original_ordering->length() > 0) {
klass->set_method_ordering(merged_ordering);
MetadataFactory::free_array(cld, original_ordering);
--- a/hotspot/src/share/vm/code/nmethod.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/code/nmethod.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -618,21 +618,18 @@
// record this nmethod as dependent on this klass
InstanceKlass::cast(klass)->add_dependent_nmethod(nm);
}
- }
- NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm));
- if (PrintAssembly && nm != NULL) {
- Disassembler::decode(nm);
+ NOT_PRODUCT(nmethod_stats.note_nmethod(nm));
+ if (PrintAssembly) {
+ Disassembler::decode(nm);
+ }
}
}
-
- // verify nmethod
- debug_only(if (nm) nm->verify();) // might block
-
+ // Do verification and logging outside CodeCache_lock.
if (nm != NULL) {
+ // Safepoints in nmethod::verify aren't allowed because nm hasn't been installed yet.
+ DEBUG_ONLY(nm->verify();)
nm->log_new_nmethod();
}
-
- // done
return nm;
}
@@ -1262,7 +1259,7 @@
set_osr_link(NULL);
//set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods
- NMethodSweeper::notify();
+ NMethodSweeper::report_state_change(this);
}
void nmethod::invalidate_osr_method() {
@@ -1296,7 +1293,9 @@
}
}
-// Common functionality for both make_not_entrant and make_zombie
+/**
+ * Common functionality for both make_not_entrant and make_zombie
+ */
bool nmethod::make_not_entrant_or_zombie(unsigned int state) {
assert(state == zombie || state == not_entrant, "must be zombie or not_entrant");
assert(!is_zombie(), "should not already be a zombie");
@@ -1420,9 +1419,7 @@
tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie");
}
- // Make sweeper aware that there is a zombie method that needs to be removed
- NMethodSweeper::notify();
-
+ NMethodSweeper::report_state_change(this);
return true;
}
@@ -2395,20 +2392,23 @@
void nmethod::verify_interrupt_point(address call_site) {
- // This code does not work in release mode since
- // owns_lock only is available in debug mode.
- CompiledIC* ic = NULL;
- Thread *cur = Thread::current();
- if (CompiledIC_lock->owner() == cur ||
- ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) &&
- SafepointSynchronize::is_at_safepoint())) {
- ic = CompiledIC_at(this, call_site);
- CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
- } else {
- MutexLocker ml_verify (CompiledIC_lock);
- ic = CompiledIC_at(this, call_site);
+ // Verify IC only when nmethod installation is finished.
+ bool is_installed = (method()->code() == this) // nmethod is in state 'alive' and installed
+ || !this->is_in_use(); // nmethod is installed, but not in 'alive' state
+ if (is_installed) {
+ Thread *cur = Thread::current();
+ if (CompiledIC_lock->owner() == cur ||
+ ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) &&
+ SafepointSynchronize::is_at_safepoint())) {
+ CompiledIC_at(this, call_site);
+ CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
+ } else {
+ MutexLocker ml_verify (CompiledIC_lock);
+ CompiledIC_at(this, call_site);
+ }
}
- PcDesc* pd = pc_desc_at(ic->end_of_call());
+
+ PcDesc* pd = pc_desc_at(nativeCall_at(call_site)->return_address());
assert(pd != NULL, "PcDesc must exist");
for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(),
pd->obj_decode_offset(), pd->should_reexecute(),
--- a/hotspot/src/share/vm/compiler/compileBroker.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/compiler/compileBroker.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -126,6 +126,7 @@
bool CompileBroker::_initialized = false;
volatile bool CompileBroker::_should_block = false;
+volatile jint CompileBroker::_print_compilation_warning = 0;
volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
// The installed compiler(s)
@@ -2027,11 +2028,10 @@
#endif
}
-// ------------------------------------------------------------------
-// CompileBroker::handle_full_code_cache
-//
-// The CodeCache is full. Print out warning and disable compilation or
-// try code cache cleaning so compilation can continue later.
+/**
+ * The CodeCache is full. Print out warning and disable compilation
+ * or try code cache cleaning so compilation can continue later.
+ */
void CompileBroker::handle_full_code_cache() {
UseInterpreter = true;
if (UseCompiler || AlwaysCompileLoopMethods ) {
@@ -2048,12 +2048,9 @@
xtty->stamp();
xtty->end_elem();
}
- warning("CodeCache is full. Compiler has been disabled.");
- warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
CodeCache::report_codemem_full();
-
#ifndef PRODUCT
if (CompileTheWorld || ExitOnFullCodeCache) {
codecache_print(/* detailed= */ true);
@@ -2066,17 +2063,22 @@
// Since code cache is full, immediately stop new compiles
if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
NMethodSweeper::log_sweep("disable_compiler");
-
- // Switch to 'vm_state'. This ensures that possibly_sweep() can be called
- // without having to consider the state in which the current thread is.
- ThreadInVMfromUnknown in_vm;
- NMethodSweeper::possibly_sweep();
}
+ // Switch to 'vm_state'. This ensures that possibly_sweep() can be called
+ // without having to consider the state in which the current thread is.
+ ThreadInVMfromUnknown in_vm;
+ NMethodSweeper::possibly_sweep();
} else {
disable_compilation_forever();
}
+
+ // Print warning only once
+ if (should_print_compiler_warning()) {
+ warning("CodeCache is full. Compiler has been disabled.");
+ warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
+ codecache_print(/* detailed= */ true);
+ }
}
- codecache_print(/* detailed= */ true);
}
// ------------------------------------------------------------------
--- a/hotspot/src/share/vm/compiler/compileBroker.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/compiler/compileBroker.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -315,6 +315,8 @@
static int _sum_nmethod_code_size;
static long _peak_compilation_time;
+ static volatile jint _print_compilation_warning;
+
static CompilerThread* make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, AbstractCompiler* comp, TRAPS);
static void init_compiler_threads(int c1_compiler_count, int c2_compiler_count);
static bool compilation_is_complete (methodHandle method, int osr_bci, int comp_level);
@@ -418,7 +420,11 @@
return _should_compile_new_jobs == shutdown_compilaton;
}
static void handle_full_code_cache();
-
+ // Ensures that warning is only printed once.
+ static bool should_print_compiler_warning() {
+ jint old = Atomic::cmpxchg(1, &_print_compilation_warning, 0);
+ return old == 0;
+ }
// Return total compilation ticks
static jlong total_compilation_ticks() {
return _perf_total_compilation != NULL ? _perf_total_compilation->get_value() : 0;
--- a/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -47,8 +47,9 @@
// ConcurrentMarkSweepPolicy methods
//
-ConcurrentMarkSweepPolicy::ConcurrentMarkSweepPolicy() {
- initialize_all();
+void ConcurrentMarkSweepPolicy::initialize_alignments() {
+ _space_alignment = _gen_alignment = (uintx)Generation::GenGrain;
+ _heap_alignment = compute_heap_alignment();
}
void ConcurrentMarkSweepPolicy::initialize_generations() {
--- a/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -29,10 +29,11 @@
class ConcurrentMarkSweepPolicy : public TwoGenerationCollectorPolicy {
protected:
+ void initialize_alignments();
void initialize_generations();
public:
- ConcurrentMarkSweepPolicy();
+ ConcurrentMarkSweepPolicy() {}
ConcurrentMarkSweepPolicy* as_concurrent_mark_sweep_policy() { return this; }
--- a/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -594,9 +594,9 @@
_verification_mark_bm(0, Mutex::leaf + 1, "CMS_verification_mark_bm_lock"),
_completed_initialization(false),
_collector_policy(cp),
- _should_unload_classes(false),
+ _should_unload_classes(CMSClassUnloadingEnabled),
_concurrent_cycles_since_last_unload(0),
- _roots_scanning_options(0),
+ _roots_scanning_options(SharedHeap::SO_None),
_inter_sweep_estimate(CMS_SweepWeight, CMS_SweepPadding),
_intra_sweep_estimate(CMS_SweepWeight, CMS_SweepPadding),
_gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) CMSTracer()),
@@ -788,14 +788,6 @@
&& _survivor_chunk_index == 0),
"Error");
- // Choose what strong roots should be scanned depending on verification options
- if (!CMSClassUnloadingEnabled) {
- // If class unloading is disabled we want to include all classes into the root set.
- add_root_scanning_option(SharedHeap::SO_AllClasses);
- } else {
- add_root_scanning_option(SharedHeap::SO_SystemClasses);
- }
-
NOT_PRODUCT(_overflow_counter = CMSMarkStackOverflowInterval;)
_gc_counters = new CollectorCounters("CMS", 1);
_completed_initialization = true;
@@ -2532,6 +2524,9 @@
// Snapshot the soft reference policy to be used in this collection cycle.
ref_processor()->setup_policy(clear_all_soft_refs);
+ // Decide if class unloading should be done
+ update_should_unload_classes();
+
bool init_mark_was_synchronous = false; // until proven otherwise
while (_collectorState != Idling) {
if (TraceCMSState) {
@@ -3310,7 +3305,10 @@
|| VerifyBeforeExit;
const int rso = SharedHeap::SO_Strings | SharedHeap::SO_CodeCache;
+ // We set the proper root for this CMS cycle here.
if (should_unload_classes()) { // Should unload classes this cycle
+ remove_root_scanning_option(SharedHeap::SO_AllClasses);
+ add_root_scanning_option(SharedHeap::SO_SystemClasses);
remove_root_scanning_option(rso); // Shrink the root set appropriately
set_verifying(should_verify); // Set verification state for this cycle
return; // Nothing else needs to be done at this time
@@ -3318,6 +3316,9 @@
// Not unloading classes this cycle
assert(!should_unload_classes(), "Inconsitency!");
+ remove_root_scanning_option(SharedHeap::SO_SystemClasses);
+ add_root_scanning_option(SharedHeap::SO_AllClasses);
+
if ((!verifying() || unloaded_classes_last_cycle()) && should_verify) {
// Include symbols, strings and code cache elements to prevent their resurrection.
add_root_scanning_option(rso);
--- a/hotspot/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -2008,7 +2008,7 @@
size_t init_byte_size = collector_policy()->initial_heap_byte_size();
size_t max_byte_size = collector_policy()->max_heap_byte_size();
- size_t heap_alignment = collector_policy()->max_alignment();
+ size_t heap_alignment = collector_policy()->heap_alignment();
// Ensure that the sizes are properly aligned.
Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap");
@@ -6656,13 +6656,18 @@
if (!oopDesc::is_null(heap_oop)) {
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
HeapRegion* hr = _g1h->heap_region_containing(obj);
- assert(!hr->isHumongous(), "code root in humongous region?");
+ assert(!hr->continuesHumongous(),
+ err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT
+ " starting at "HR_FORMAT,
+ _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region())));
// HeapRegion::add_strong_code_root() avoids adding duplicate
// entries but having duplicates is OK since we "mark" nmethods
// as visited when we scan the strong code root lists during the GC.
hr->add_strong_code_root(_nm);
- assert(hr->rem_set()->strong_code_roots_list_contains(_nm), "add failed?");
+ assert(hr->rem_set()->strong_code_roots_list_contains(_nm),
+ err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT,
+ _nm, HR_FORMAT_PARAMS(hr)));
}
}
@@ -6683,9 +6688,15 @@
if (!oopDesc::is_null(heap_oop)) {
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
HeapRegion* hr = _g1h->heap_region_containing(obj);
- assert(!hr->isHumongous(), "code root in humongous region?");
+ assert(!hr->continuesHumongous(),
+ err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT
+ " starting at "HR_FORMAT,
+ _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region())));
+
hr->remove_strong_code_root(_nm);
- assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), "remove failed?");
+ assert(!hr->rem_set()->strong_code_roots_list_contains(_nm),
+ err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT,
+ _nm, HR_FORMAT_PARAMS(hr)));
}
}
@@ -6716,7 +6727,9 @@
class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure {
public:
bool doHeapRegion(HeapRegion *hr) {
- assert(!hr->isHumongous(), "humongous region in collection set?");
+ assert(!hr->isHumongous(),
+ err_msg("humongous region "HR_FORMAT" should not have been added to collection set",
+ HR_FORMAT_PARAMS(hr)));
hr->migrate_strong_code_roots();
return false;
}
@@ -6796,9 +6809,13 @@
bool doHeapRegion(HeapRegion *hr) {
HeapRegionRemSet* hrrs = hr->rem_set();
- if (hr->isHumongous()) {
- // Code roots should never be attached to a humongous region
- assert(hrrs->strong_code_roots_list_length() == 0, "sanity");
+ if (hr->continuesHumongous()) {
+ // Code roots should never be attached to a continuation of a humongous region
+ assert(hrrs->strong_code_roots_list_length() == 0,
+ err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT
+ " starting at "HR_FORMAT", but has "INT32_FORMAT,
+ HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()),
+ hrrs->strong_code_roots_list_length()));
return false;
}
--- a/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -313,27 +313,38 @@
// for the first time during initialization.
_reserve_regions = 0;
- initialize_all();
_collectionSetChooser = new CollectionSetChooser();
- _young_gen_sizer = new G1YoungGenSizer(); // Must be after call to initialize_flags
+}
+
+void G1CollectorPolicy::initialize_alignments() {
+ _space_alignment = HeapRegion::GrainBytes;
+ size_t card_table_alignment = GenRemSet::max_alignment_constraint(GenRemSet::CardTable);
+ size_t page_size = UseLargePages ? os::large_page_size() : os::vm_page_size();
+ _heap_alignment = MAX3(card_table_alignment, _space_alignment, page_size);
}
void G1CollectorPolicy::initialize_flags() {
- _min_alignment = HeapRegion::GrainBytes;
- size_t card_table_alignment = GenRemSet::max_alignment_constraint(rem_set_name());
- size_t page_size = UseLargePages ? os::large_page_size() : os::vm_page_size();
- _max_alignment = MAX3(card_table_alignment, _min_alignment, page_size);
+ if (G1HeapRegionSize != HeapRegion::GrainBytes) {
+ FLAG_SET_ERGO(uintx, G1HeapRegionSize, HeapRegion::GrainBytes);
+ }
+
if (SurvivorRatio < 1) {
vm_exit_during_initialization("Invalid survivor ratio specified");
}
CollectorPolicy::initialize_flags();
+ _young_gen_sizer = new G1YoungGenSizer(); // Must be after call to initialize_flags
}
-G1YoungGenSizer::G1YoungGenSizer() : _sizer_kind(SizerDefaults), _adaptive_size(true) {
- assert(G1NewSizePercent <= G1MaxNewSizePercent, "Min larger than max");
- assert(G1NewSizePercent > 0 && G1NewSizePercent < 100, "Min out of bounds");
- assert(G1MaxNewSizePercent > 0 && G1MaxNewSizePercent < 100, "Max out of bounds");
+void G1CollectorPolicy::post_heap_initialize() {
+ uintx max_regions = G1CollectedHeap::heap()->max_regions();
+ size_t max_young_size = (size_t)_young_gen_sizer->max_young_length(max_regions) * HeapRegion::GrainBytes;
+ if (max_young_size != MaxNewSize) {
+ FLAG_SET_ERGO(uintx, MaxNewSize, max_young_size);
+ }
+}
+G1YoungGenSizer::G1YoungGenSizer() : _sizer_kind(SizerDefaults), _adaptive_size(true),
+ _min_desired_young_length(0), _max_desired_young_length(0) {
if (FLAG_IS_CMDLINE(NewRatio)) {
if (FLAG_IS_CMDLINE(NewSize) || FLAG_IS_CMDLINE(MaxNewSize)) {
warning("-XX:NewSize and -XX:MaxNewSize override -XX:NewRatio");
@@ -344,8 +355,13 @@
}
}
- if (FLAG_IS_CMDLINE(NewSize) && FLAG_IS_CMDLINE(MaxNewSize) && NewSize > MaxNewSize) {
- vm_exit_during_initialization("Initial young gen size set larger than the maximum young gen size");
+ if (NewSize > MaxNewSize) {
+ if (FLAG_IS_CMDLINE(MaxNewSize)) {
+ warning("NewSize (" SIZE_FORMAT "k) is greater than the MaxNewSize (" SIZE_FORMAT "k). "
+ "A new max generation size of " SIZE_FORMAT "k will be used.",
+ NewSize/K, MaxNewSize/K, NewSize/K);
+ }
+ MaxNewSize = NewSize;
}
if (FLAG_IS_CMDLINE(NewSize)) {
@@ -378,34 +394,48 @@
return MAX2(1U, default_value);
}
-void G1YoungGenSizer::heap_size_changed(uint new_number_of_heap_regions) {
- assert(new_number_of_heap_regions > 0, "Heap must be initialized");
+void G1YoungGenSizer::recalculate_min_max_young_length(uint number_of_heap_regions, uint* min_young_length, uint* max_young_length) {
+ assert(number_of_heap_regions > 0, "Heap must be initialized");
switch (_sizer_kind) {
case SizerDefaults:
- _min_desired_young_length = calculate_default_min_length(new_number_of_heap_regions);
- _max_desired_young_length = calculate_default_max_length(new_number_of_heap_regions);
+ *min_young_length = calculate_default_min_length(number_of_heap_regions);
+ *max_young_length = calculate_default_max_length(number_of_heap_regions);
break;
case SizerNewSizeOnly:
- _max_desired_young_length = calculate_default_max_length(new_number_of_heap_regions);
- _max_desired_young_length = MAX2(_min_desired_young_length, _max_desired_young_length);
+ *max_young_length = calculate_default_max_length(number_of_heap_regions);
+ *max_young_length = MAX2(*min_young_length, *max_young_length);
break;
case SizerMaxNewSizeOnly:
- _min_desired_young_length = calculate_default_min_length(new_number_of_heap_regions);
- _min_desired_young_length = MIN2(_min_desired_young_length, _max_desired_young_length);
+ *min_young_length = calculate_default_min_length(number_of_heap_regions);
+ *min_young_length = MIN2(*min_young_length, *max_young_length);
break;
case SizerMaxAndNewSize:
// Do nothing. Values set on the command line, don't update them at runtime.
break;
case SizerNewRatio:
- _min_desired_young_length = new_number_of_heap_regions / (NewRatio + 1);
- _max_desired_young_length = _min_desired_young_length;
+ *min_young_length = number_of_heap_regions / (NewRatio + 1);
+ *max_young_length = *min_young_length;
break;
default:
ShouldNotReachHere();
}
- assert(_min_desired_young_length <= _max_desired_young_length, "Invalid min/max young gen size values");
+ assert(*min_young_length <= *max_young_length, "Invalid min/max young gen size values");
+}
+
+uint G1YoungGenSizer::max_young_length(uint number_of_heap_regions) {
+ // We need to pass the desired values because recalculation may not update these
+ // values in some cases.
+ uint temp = _min_desired_young_length;
+ uint result = _max_desired_young_length;
+ recalculate_min_max_young_length(number_of_heap_regions, &temp, &result);
+ return result;
+}
+
+void G1YoungGenSizer::heap_size_changed(uint new_number_of_heap_regions) {
+ recalculate_min_max_young_length(new_number_of_heap_regions, &_min_desired_young_length,
+ &_max_desired_young_length);
}
void G1CollectorPolicy::init() {
--- a/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -136,8 +136,16 @@
uint calculate_default_min_length(uint new_number_of_heap_regions);
uint calculate_default_max_length(uint new_number_of_heap_regions);
+ // Update the given values for minimum and maximum young gen length in regions
+ // given the number of heap regions depending on the kind of sizing algorithm.
+ void recalculate_min_max_young_length(uint number_of_heap_regions, uint* min_young_length, uint* max_young_length);
+
public:
G1YoungGenSizer();
+ // Calculate the maximum length of the young gen given the number of regions
+ // depending on the sizing algorithm.
+ uint max_young_length(uint number_of_heap_regions);
+
void heap_size_changed(uint new_number_of_heap_regions);
uint min_desired_young_length() {
return _min_desired_young_length;
@@ -165,13 +173,9 @@
G1MMUTracker* _mmu_tracker;
+ void initialize_alignments();
void initialize_flags();
- void initialize_all() {
- initialize_flags();
- initialize_size_info();
- }
-
CollectionSetChooser* _collectionSetChooser;
double _full_collection_start_sec;
@@ -217,7 +221,6 @@
return _during_marking;
}
-private:
enum PredictionConstants {
TruncatedSeqLength = 10
};
@@ -665,8 +668,6 @@
BarrierSet::Name barrier_set_name() { return BarrierSet::G1SATBCTLogging; }
- GenRemSet::Name rem_set_name() { return GenRemSet::CardTable; }
-
bool need_to_start_conc_mark(const char* source, size_t alloc_word_size = 0);
// Record the start and end of an evacuation pause.
@@ -934,6 +935,7 @@
// Calculates survivor space parameters.
void update_survivors_policy();
+ virtual void post_heap_initialize();
};
// This should move to some place more general...
--- a/hotspot/src/share/vm/gc_implementation/g1/g1RemSet.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1RemSet.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -377,11 +377,6 @@
DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
dcqs.concatenate_logs();
- if (G1CollectedHeap::use_parallel_gc_threads()) {
- // Don't set the number of workers here. It will be set
- // when the task is run
- // _seq_task->set_n_termination((int)n_workers());
- }
guarantee( _cards_scanned == NULL, "invariant" );
_cards_scanned = NEW_C_HEAP_ARRAY(size_t, n_workers(), mtGC);
for (uint i = 0; i < n_workers(); ++i) {
--- a/hotspot/src/share/vm/gc_implementation/g1/heapRegion.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/g1/heapRegion.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -174,11 +174,6 @@
region_size = MAX_REGION_SIZE;
}
- if (region_size != G1HeapRegionSize) {
- // Update the flag to make sure that PrintFlagsFinal logs the correct value
- FLAG_SET_ERGO(uintx, G1HeapRegionSize, region_size);
- }
-
// And recalculate the log.
region_size_log = log2_long((jlong) region_size);
@@ -606,7 +601,9 @@
void HeapRegion::migrate_strong_code_roots() {
assert(in_collection_set(), "only collection set regions");
- assert(!isHumongous(), "not humongous regions");
+ assert(!isHumongous(),
+ err_msg("humongous region "HR_FORMAT" should not have been added to collection set",
+ HR_FORMAT_PARAMS(this)));
HeapRegionRemSet* hrrs = rem_set();
hrrs->migrate_strong_code_roots();
@@ -727,12 +724,11 @@
return;
}
- // An H-region should have an empty strong code root list
- if (isHumongous()) {
+ if (continuesHumongous()) {
if (strong_code_roots_length > 0) {
- gclog_or_tty->print_cr("region ["PTR_FORMAT","PTR_FORMAT"] is humongous "
- "but has "INT32_FORMAT" code root entries",
- bottom(), end(), strong_code_roots_length);
+ gclog_or_tty->print_cr("region "HR_FORMAT" is a continuation of a humongous "
+ "region but has "INT32_FORMAT" code root entries",
+ HR_FORMAT_PARAMS(this), strong_code_roots_length);
*failures = true;
}
return;
--- a/hotspot/src/share/vm/gc_implementation/g1/heapRegionRemSet.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/g1/heapRegionRemSet.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -1004,7 +1004,9 @@
void HeapRegionRemSet::migrate_strong_code_roots() {
assert(hr()->in_collection_set(), "only collection set regions");
- assert(!hr()->isHumongous(), "not humongous regions");
+ assert(!hr()->isHumongous(),
+ err_msg("humongous region "HR_FORMAT" should not have been added to the collection set",
+ HR_FORMAT_PARAMS(hr())));
ResourceMark rm;
--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/adjoiningGenerations.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/adjoiningGenerations.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -25,6 +25,7 @@
#include "precompiled.hpp"
#include "gc_implementation/parallelScavenge/adjoiningGenerations.hpp"
#include "gc_implementation/parallelScavenge/adjoiningVirtualSpaces.hpp"
+#include "gc_implementation/parallelScavenge/generationSizer.hpp"
#include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
// If boundary moving is being used, create the young gen and old
@@ -32,15 +33,17 @@
// the old behavior otherwise (with PSYoungGen and PSOldGen).
AdjoiningGenerations::AdjoiningGenerations(ReservedSpace old_young_rs,
- size_t init_low_byte_size,
- size_t min_low_byte_size,
- size_t max_low_byte_size,
- size_t init_high_byte_size,
- size_t min_high_byte_size,
- size_t max_high_byte_size,
+ GenerationSizer* policy,
size_t alignment) :
- _virtual_spaces(old_young_rs, min_low_byte_size,
- min_high_byte_size, alignment) {
+ _virtual_spaces(old_young_rs, policy->min_gen1_size(),
+ policy->min_gen0_size(), alignment) {
+ size_t init_low_byte_size = policy->initial_gen1_size();
+ size_t min_low_byte_size = policy->min_gen1_size();
+ size_t max_low_byte_size = policy->max_gen1_size();
+ size_t init_high_byte_size = policy->initial_gen0_size();
+ size_t min_high_byte_size = policy->min_gen0_size();
+ size_t max_high_byte_size = policy->max_gen0_size();
+
assert(min_low_byte_size <= init_low_byte_size &&
init_low_byte_size <= max_low_byte_size, "Parameter check");
assert(min_high_byte_size <= init_high_byte_size &&
--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/adjoiningGenerations.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/adjoiningGenerations.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -28,6 +28,7 @@
#include "gc_implementation/parallelScavenge/adjoiningVirtualSpaces.hpp"
#include "gc_implementation/parallelScavenge/asPSOldGen.hpp"
#include "gc_implementation/parallelScavenge/asPSYoungGen.hpp"
+#include "gc_implementation/parallelScavenge/generationSizer.hpp"
// Contains two generations that both use an AdjoiningVirtualSpaces.
@@ -56,14 +57,7 @@
bool request_young_gen_expansion(size_t desired_change_in_bytes);
public:
- AdjoiningGenerations(ReservedSpace rs,
- size_t init_low_byte_size,
- size_t min_low_byte_size,
- size_t max_low_byte_size,
- size_t init_high_byte_size,
- size_t min_high_byte_size,
- size_t max_high_bytes_size,
- size_t alignment);
+ AdjoiningGenerations(ReservedSpace rs, GenerationSizer* policy, size_t alignment);
// Accessors
PSYoungGen* young_gen() { return _young_gen; }
--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/asPSOldGen.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/asPSOldGen.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -54,7 +54,6 @@
int level) :
PSOldGen(initial_size, min_size, size_limit, gen_name, level),
_gen_size_limit(size_limit)
-
{}
ASPSOldGen::ASPSOldGen(PSVirtualSpace* vs,
@@ -65,13 +64,11 @@
int level) :
PSOldGen(initial_size, min_size, size_limit, gen_name, level),
_gen_size_limit(size_limit)
-
{
_virtual_space = vs;
}
void ASPSOldGen::initialize_work(const char* perf_data_name, int level) {
-
PSOldGen::initialize_work(perf_data_name, level);
// The old gen can grow to gen_size_limit(). _reserve reflects only
@@ -94,7 +91,7 @@
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
size_t result = gen_size_limit() - virtual_space()->committed_size();
- size_t result_aligned = align_size_down(result, heap->old_gen_alignment());
+ size_t result_aligned = align_size_down(result, heap->generation_alignment());
return result_aligned;
}
@@ -105,7 +102,7 @@
}
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
- const size_t gen_alignment = heap->old_gen_alignment();
+ const size_t gen_alignment = heap->generation_alignment();
PSAdaptiveSizePolicy* policy = heap->size_policy();
const size_t working_size =
used_in_bytes() + (size_t) policy->avg_promoted()->padded_average();
--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/asPSYoungGen.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/asPSYoungGen.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -70,13 +70,12 @@
}
size_t ASPSYoungGen::available_for_expansion() {
-
size_t current_committed_size = virtual_space()->committed_size();
assert((gen_size_limit() >= current_committed_size),
"generation size limit is wrong");
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
size_t result = gen_size_limit() - current_committed_size;
- size_t result_aligned = align_size_down(result, heap->young_gen_alignment());
+ size_t result_aligned = align_size_down(result, heap->generation_alignment());
return result_aligned;
}
@@ -85,7 +84,6 @@
// Future implementations could check the survivors and if to_space is in the
// right place (below from_space), take a chunk from to_space.
size_t ASPSYoungGen::available_for_contraction() {
-
size_t uncommitted_bytes = virtual_space()->uncommitted_size();
if (uncommitted_bytes != 0) {
return uncommitted_bytes;
@@ -94,8 +92,8 @@
if (eden_space()->is_empty()) {
// Respect the minimum size for eden and for the young gen as a whole.
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
- const size_t eden_alignment = heap->intra_heap_alignment();
- const size_t gen_alignment = heap->young_gen_alignment();
+ const size_t eden_alignment = heap->space_alignment();
+ const size_t gen_alignment = heap->generation_alignment();
assert(eden_space()->capacity_in_bytes() >= eden_alignment,
"Alignment is wrong");
@@ -121,7 +119,6 @@
gclog_or_tty->print_cr(" gen_avail %d K", gen_avail/K);
}
return result_aligned;
-
}
return 0;
@@ -132,7 +129,7 @@
// to_space can be.
size_t ASPSYoungGen::available_to_live() {
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
- const size_t alignment = heap->intra_heap_alignment();
+ const size_t alignment = heap->space_alignment();
// Include any space that is committed but is not in eden.
size_t available = pointer_delta(eden_space()->bottom(),
@@ -296,7 +293,7 @@
assert(eden_start < from_start, "Cannot push into from_space");
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
- const size_t alignment = heap->intra_heap_alignment();
+ const size_t alignment = heap->space_alignment();
const bool maintain_minimum =
(requested_eden_size + 2 * requested_survivor_size) <= min_gen_size();
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/generationSizer.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "gc_implementation/parallelScavenge/generationSizer.hpp"
+#include "memory/collectorPolicy.hpp"
+
+void GenerationSizer::trace_gen_sizes(const char* const str) {
+ if (TracePageSizes) {
+ tty->print_cr("%s: " SIZE_FORMAT "," SIZE_FORMAT " "
+ SIZE_FORMAT "," SIZE_FORMAT " "
+ SIZE_FORMAT,
+ str,
+ _min_gen1_size / K, _max_gen1_size / K,
+ _min_gen0_size / K, _max_gen0_size / K,
+ _max_heap_byte_size / K);
+ }
+}
+
+void GenerationSizer::initialize_alignments() {
+ _space_alignment = _gen_alignment = default_gen_alignment();
+ _heap_alignment = compute_heap_alignment();
+}
+
+void GenerationSizer::initialize_flags() {
+ // Do basic sizing work
+ TwoGenerationCollectorPolicy::initialize_flags();
+
+ assert(UseSerialGC ||
+ !FLAG_IS_DEFAULT(ParallelGCThreads) ||
+ (ParallelGCThreads > 0),
+ "ParallelGCThreads should be set before flag initialization");
+
+ // The survivor ratio's are calculated "raw", unlike the
+ // default gc, which adds 2 to the ratio value. We need to
+ // make sure the values are valid before using them.
+ if (MinSurvivorRatio < 3) {
+ FLAG_SET_ERGO(uintx, MinSurvivorRatio, 3);
+ }
+
+ if (InitialSurvivorRatio < 3) {
+ FLAG_SET_ERGO(uintx, InitialSurvivorRatio, 3);
+ }
+}
+
+void GenerationSizer::initialize_size_info() {
+ trace_gen_sizes("ps heap raw");
+ const size_t page_sz = os::page_size_for_region(_min_heap_byte_size,
+ _max_heap_byte_size,
+ 8);
+
+ // Can a page size be something else than a power of two?
+ assert(is_power_of_2((intptr_t)page_sz), "must be a power of 2");
+ size_t new_alignment = round_to(page_sz, _gen_alignment);
+ if (new_alignment != _gen_alignment) {
+ _gen_alignment = new_alignment;
+ _space_alignment = new_alignment;
+ // Redo everything from the start
+ initialize_flags();
+ }
+ TwoGenerationCollectorPolicy::initialize_size_info();
+
+ trace_gen_sizes("ps heap rnd");
+}
--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -31,41 +31,17 @@
// TwoGenerationCollectorPolicy. Lets reuse it!
class GenerationSizer : public TwoGenerationCollectorPolicy {
- public:
- GenerationSizer() {
- // Partial init only!
- initialize_flags();
- initialize_size_info();
- }
+ private:
- void initialize_flags() {
- // Do basic sizing work
- TwoGenerationCollectorPolicy::initialize_flags();
+ void trace_gen_sizes(const char* const str);
- assert(UseSerialGC ||
- !FLAG_IS_DEFAULT(ParallelGCThreads) ||
- (ParallelGCThreads > 0),
- "ParallelGCThreads should be set before flag initialization");
+ // The alignment used for boundary between young gen and old gen
+ static size_t default_gen_alignment() { return 64 * K * HeapWordSize; }
- // The survivor ratio's are calculated "raw", unlike the
- // default gc, which adds 2 to the ratio value. We need to
- // make sure the values are valid before using them.
- if (MinSurvivorRatio < 3) {
- MinSurvivorRatio = 3;
- }
+ protected:
- if (InitialSurvivorRatio < 3) {
- InitialSurvivorRatio = 3;
- }
- }
-
- size_t min_young_gen_size() { return _min_gen0_size; }
- size_t young_gen_size() { return _initial_gen0_size; }
- size_t max_young_gen_size() { return _max_gen0_size; }
-
- size_t min_old_gen_size() { return _min_gen1_size; }
- size_t old_gen_size() { return _initial_gen1_size; }
- size_t max_old_gen_size() { return _max_gen1_size; }
+ void initialize_alignments();
+ void initialize_flags();
+ void initialize_size_info();
};
-
#endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP
--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -52,76 +52,20 @@
ParallelScavengeHeap* ParallelScavengeHeap::_psh = NULL;
GCTaskManager* ParallelScavengeHeap::_gc_task_manager = NULL;
-static void trace_gen_sizes(const char* const str,
- size_t og_min, size_t og_max,
- size_t yg_min, size_t yg_max)
-{
- if (TracePageSizes) {
- tty->print_cr("%s: " SIZE_FORMAT "," SIZE_FORMAT " "
- SIZE_FORMAT "," SIZE_FORMAT " "
- SIZE_FORMAT,
- str,
- og_min / K, og_max / K,
- yg_min / K, yg_max / K,
- (og_max + yg_max) / K);
- }
-}
-
jint ParallelScavengeHeap::initialize() {
CollectedHeap::pre_initialize();
- // Cannot be initialized until after the flags are parsed
- // GenerationSizer flag_parser;
+ // Initialize collector policy
_collector_policy = new GenerationSizer();
-
- size_t yg_min_size = _collector_policy->min_young_gen_size();
- size_t yg_max_size = _collector_policy->max_young_gen_size();
- size_t og_min_size = _collector_policy->min_old_gen_size();
- size_t og_max_size = _collector_policy->max_old_gen_size();
-
- trace_gen_sizes("ps heap raw",
- og_min_size, og_max_size,
- yg_min_size, yg_max_size);
-
- const size_t og_page_sz = os::page_size_for_region(yg_min_size + og_min_size,
- yg_max_size + og_max_size,
- 8);
-
- const size_t og_align = set_alignment(_old_gen_alignment, og_page_sz);
- const size_t yg_align = set_alignment(_young_gen_alignment, og_page_sz);
+ _collector_policy->initialize_all();
- // Update sizes to reflect the selected page size(s).
- //
- // NEEDS_CLEANUP. The default TwoGenerationCollectorPolicy uses NewRatio; it
- // should check UseAdaptiveSizePolicy. Changes from generationSizer could
- // move to the common code.
- yg_min_size = align_size_up(yg_min_size, yg_align);
- yg_max_size = align_size_up(yg_max_size, yg_align);
- size_t yg_cur_size =
- align_size_up(_collector_policy->young_gen_size(), yg_align);
- yg_cur_size = MAX2(yg_cur_size, yg_min_size);
+ const size_t heap_size = _collector_policy->max_heap_byte_size();
- og_min_size = align_size_up(og_min_size, og_align);
- // Align old gen size down to preserve specified heap size.
- assert(og_align == yg_align, "sanity");
- og_max_size = align_size_down(og_max_size, og_align);
- og_max_size = MAX2(og_max_size, og_min_size);
- size_t og_cur_size =
- align_size_down(_collector_policy->old_gen_size(), og_align);
- og_cur_size = MAX2(og_cur_size, og_min_size);
-
- trace_gen_sizes("ps heap rnd",
- og_min_size, og_max_size,
- yg_min_size, yg_max_size);
-
- const size_t heap_size = og_max_size + yg_max_size;
-
- ReservedSpace heap_rs = Universe::reserve_heap(heap_size, og_align);
-
+ ReservedSpace heap_rs = Universe::reserve_heap(heap_size, _collector_policy->heap_alignment());
MemTracker::record_virtual_memory_type((address)heap_rs.base(), mtJavaHeap);
- os::trace_page_sizes("ps main", og_min_size + yg_min_size,
- og_max_size + yg_max_size, og_page_sz,
+ os::trace_page_sizes("ps main", _collector_policy->min_heap_byte_size(),
+ heap_size, generation_alignment(),
heap_rs.base(),
heap_rs.size());
if (!heap_rs.is_reserved()) {
@@ -142,12 +86,6 @@
return JNI_ENOMEM;
}
- // Initial young gen size is 4 Mb
- //
- // XXX - what about flag_parser.young_gen_size()?
- const size_t init_young_size = align_size_up(4 * M, yg_align);
- yg_cur_size = MAX2(MIN2(init_young_size, yg_max_size), yg_cur_size);
-
// Make up the generations
// Calculate the maximum size that a generation can grow. This
// includes growth into the other generation. Note that the
@@ -157,14 +95,7 @@
double max_gc_pause_sec = ((double) MaxGCPauseMillis)/1000.0;
double max_gc_minor_pause_sec = ((double) MaxGCMinorPauseMillis)/1000.0;
- _gens = new AdjoiningGenerations(heap_rs,
- og_cur_size,
- og_min_size,
- og_max_size,
- yg_cur_size,
- yg_min_size,
- yg_max_size,
- yg_align);
+ _gens = new AdjoiningGenerations(heap_rs, _collector_policy, generation_alignment());
_old_gen = _gens->old_gen();
_young_gen = _gens->young_gen();
@@ -176,7 +107,7 @@
new PSAdaptiveSizePolicy(eden_capacity,
initial_promo_size,
young_gen()->to_space()->capacity_in_bytes(),
- intra_heap_alignment(),
+ _collector_policy->gen_alignment(),
max_gc_pause_sec,
max_gc_minor_pause_sec,
GCTimeRatio
--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -25,6 +25,7 @@
#ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PARALLELSCAVENGEHEAP_HPP
#define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PARALLELSCAVENGEHEAP_HPP
+#include "gc_implementation/parallelScavenge/generationSizer.hpp"
#include "gc_implementation/parallelScavenge/objectStartArray.hpp"
#include "gc_implementation/parallelScavenge/psGCAdaptivePolicyCounters.hpp"
#include "gc_implementation/parallelScavenge/psOldGen.hpp"
@@ -32,14 +33,12 @@
#include "gc_implementation/shared/gcPolicyCounters.hpp"
#include "gc_implementation/shared/gcWhen.hpp"
#include "gc_interface/collectedHeap.inline.hpp"
+#include "memory/collectorPolicy.hpp"
#include "utilities/ostream.hpp"
class AdjoiningGenerations;
-class CollectorPolicy;
class GCHeapSummary;
class GCTaskManager;
-class GenerationSizer;
-class CollectorPolicy;
class PSAdaptiveSizePolicy;
class PSHeapSummary;
@@ -50,24 +49,20 @@
static PSOldGen* _old_gen;
// Sizing policy for entire heap
- static PSAdaptiveSizePolicy* _size_policy;
- static PSGCAdaptivePolicyCounters* _gc_policy_counters;
+ static PSAdaptiveSizePolicy* _size_policy;
+ static PSGCAdaptivePolicyCounters* _gc_policy_counters;
static ParallelScavengeHeap* _psh;
- size_t _young_gen_alignment;
- size_t _old_gen_alignment;
-
GenerationSizer* _collector_policy;
- inline size_t set_alignment(size_t& var, size_t val);
-
// Collection of generations that are adjacent in the
// space reserved for the heap.
AdjoiningGenerations* _gens;
unsigned int _death_march_count;
- static GCTaskManager* _gc_task_manager; // The task manager.
+ // The task manager
+ static GCTaskManager* _gc_task_manager;
void trace_heap(GCWhen::Type when, GCTracer* tracer);
@@ -80,16 +75,7 @@
HeapWord* mem_allocate_old_gen(size_t size);
public:
- ParallelScavengeHeap() : CollectedHeap() {
- _death_march_count = 0;
- set_alignment(_young_gen_alignment, intra_heap_alignment());
- set_alignment(_old_gen_alignment, intra_heap_alignment());
- }
-
- // Return the (conservative) maximum heap alignment
- static size_t conservative_max_heap_alignment() {
- return intra_heap_alignment();
- }
+ ParallelScavengeHeap() : CollectedHeap(), _death_march_count(0) { }
// For use by VM operations
enum CollectionType {
@@ -103,8 +89,8 @@
virtual CollectorPolicy* collector_policy() const { return (CollectorPolicy*) _collector_policy; }
- static PSYoungGen* young_gen() { return _young_gen; }
- static PSOldGen* old_gen() { return _old_gen; }
+ static PSYoungGen* young_gen() { return _young_gen; }
+ static PSOldGen* old_gen() { return _old_gen; }
virtual PSAdaptiveSizePolicy* size_policy() { return _size_policy; }
@@ -121,13 +107,15 @@
void post_initialize();
void update_counters();
- // The alignment used for the various generations.
- size_t young_gen_alignment() const { return _young_gen_alignment; }
- size_t old_gen_alignment() const { return _old_gen_alignment; }
+
+ // The alignment used for the various areas
+ size_t space_alignment() { return _collector_policy->space_alignment(); }
+ size_t generation_alignment() { return _collector_policy->gen_alignment(); }
- // The alignment used for eden and survivors within the young gen
- // and for boundary between young gen and old gen.
- static size_t intra_heap_alignment() { return 64 * K * HeapWordSize; }
+ // Return the (conservative) maximum heap alignment
+ static size_t conservative_max_heap_alignment() {
+ return CollectorPolicy::compute_heap_alignment();
+ }
size_t capacity() const;
size_t used() const;
@@ -157,16 +145,15 @@
virtual bool is_in_partial_collection(const void *p);
#endif
- bool is_in_young(oop p); // reserved part
- bool is_in_old(oop p); // reserved part
+ bool is_in_young(oop p); // reserved part
+ bool is_in_old(oop p); // reserved part
// Memory allocation. "gc_time_limit_was_exceeded" will
// be set to true if the adaptive size policy determine that
// an excessive amount of time is being spent doing collections
// and caused a NULL to be returned. If a NULL is not returned,
// "gc_time_limit_was_exceeded" has an undefined meaning.
- HeapWord* mem_allocate(size_t size,
- bool* gc_overhead_limit_was_exceeded);
+ HeapWord* mem_allocate(size_t size, bool* gc_overhead_limit_was_exceeded);
// Allocation attempt(s) during a safepoint. It should never be called
// to allocate a new TLAB as this allocation might be satisfied out
@@ -257,17 +244,10 @@
// Call these in sequential code around the processing of strong roots.
class ParStrongRootsScope : public MarkingCodeBlobClosure::MarkScope {
- public:
+ public:
ParStrongRootsScope();
~ParStrongRootsScope();
};
};
-inline size_t ParallelScavengeHeap::set_alignment(size_t& var, size_t val)
-{
- assert(is_power_of_2((intptr_t)val), "must be a power of 2");
- var = round_to(val, intra_heap_alignment());
- return var;
-}
-
#endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PARALLELSCAVENGEHEAP_HPP
--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/psAdaptiveSizePolicy.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/psAdaptiveSizePolicy.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -37,7 +37,7 @@
PSAdaptiveSizePolicy::PSAdaptiveSizePolicy(size_t init_eden_size,
size_t init_promo_size,
size_t init_survivor_size,
- size_t intra_generation_alignment,
+ size_t space_alignment,
double gc_pause_goal_sec,
double gc_minor_pause_goal_sec,
uint gc_cost_ratio) :
@@ -46,9 +46,8 @@
init_survivor_size,
gc_pause_goal_sec,
gc_cost_ratio),
- _collection_cost_margin_fraction(AdaptiveSizePolicyCollectionCostMargin/
- 100.0),
- _intra_generation_alignment(intra_generation_alignment),
+ _collection_cost_margin_fraction(AdaptiveSizePolicyCollectionCostMargin / 100.0),
+ _space_alignment(space_alignment),
_live_at_last_full_gc(init_promo_size),
_gc_minor_pause_goal_sec(gc_minor_pause_goal_sec),
_latest_major_mutator_interval_seconds(0),
@@ -353,11 +352,10 @@
}
// Align everything and make a final limit check
- const size_t alignment = _intra_generation_alignment;
- desired_eden_size = align_size_up(desired_eden_size, alignment);
- desired_eden_size = MAX2(desired_eden_size, alignment);
+ desired_eden_size = align_size_up(desired_eden_size, _space_alignment);
+ desired_eden_size = MAX2(desired_eden_size, _space_alignment);
- eden_limit = align_size_down(eden_limit, alignment);
+ eden_limit = align_size_down(eden_limit, _space_alignment);
// And one last limit check, now that we've aligned things.
if (desired_eden_size > eden_limit) {
@@ -561,11 +559,10 @@
}
// Align everything and make a final limit check
- const size_t alignment = _intra_generation_alignment;
- desired_promo_size = align_size_up(desired_promo_size, alignment);
- desired_promo_size = MAX2(desired_promo_size, alignment);
+ desired_promo_size = align_size_up(desired_promo_size, _space_alignment);
+ desired_promo_size = MAX2(desired_promo_size, _space_alignment);
- promo_limit = align_size_down(promo_limit, alignment);
+ promo_limit = align_size_down(promo_limit, _space_alignment);
// And one last limit check, now that we've aligned things.
desired_promo_size = MIN2(desired_promo_size, promo_limit);
@@ -650,7 +647,7 @@
}
// If the desired eden size is as small as it will get,
// try to adjust the old gen size.
- if (*desired_eden_size_ptr <= _intra_generation_alignment) {
+ if (*desired_eden_size_ptr <= _space_alignment) {
// Vary the old gen size to reduce the young gen pause. This
// may not be a good idea. This is just a test.
if (minor_pause_old_estimator()->decrement_will_decrease()) {
@@ -755,7 +752,7 @@
// If the promo size is at the minimum (i.e., the old gen
// size will not actually decrease), consider changing the
// young gen size.
- if (*desired_promo_size_ptr < _intra_generation_alignment) {
+ if (*desired_promo_size_ptr < _space_alignment) {
// If increasing the young generation will decrease the old gen
// pause, do it.
// During startup there is noise in the statistics for deciding
@@ -1066,24 +1063,24 @@
size_t PSAdaptiveSizePolicy::eden_increment_aligned_up(size_t cur_eden) {
size_t result = eden_increment(cur_eden, YoungGenerationSizeIncrement);
- return align_size_up(result, _intra_generation_alignment);
+ return align_size_up(result, _space_alignment);
}
size_t PSAdaptiveSizePolicy::eden_increment_aligned_down(size_t cur_eden) {
size_t result = eden_increment(cur_eden);
- return align_size_down(result, _intra_generation_alignment);
+ return align_size_down(result, _space_alignment);
}
size_t PSAdaptiveSizePolicy::eden_increment_with_supplement_aligned_up(
size_t cur_eden) {
size_t result = eden_increment(cur_eden,
YoungGenerationSizeIncrement + _young_gen_size_increment_supplement);
- return align_size_up(result, _intra_generation_alignment);
+ return align_size_up(result, _space_alignment);
}
size_t PSAdaptiveSizePolicy::eden_decrement_aligned_down(size_t cur_eden) {
size_t eden_heap_delta = eden_decrement(cur_eden);
- return align_size_down(eden_heap_delta, _intra_generation_alignment);
+ return align_size_down(eden_heap_delta, _space_alignment);
}
size_t PSAdaptiveSizePolicy::eden_decrement(size_t cur_eden) {
@@ -1105,24 +1102,24 @@
size_t PSAdaptiveSizePolicy::promo_increment_aligned_up(size_t cur_promo) {
size_t result = promo_increment(cur_promo, TenuredGenerationSizeIncrement);
- return align_size_up(result, _intra_generation_alignment);
+ return align_size_up(result, _space_alignment);
}
size_t PSAdaptiveSizePolicy::promo_increment_aligned_down(size_t cur_promo) {
size_t result = promo_increment(cur_promo, TenuredGenerationSizeIncrement);
- return align_size_down(result, _intra_generation_alignment);
+ return align_size_down(result, _space_alignment);
}
size_t PSAdaptiveSizePolicy::promo_increment_with_supplement_aligned_up(
size_t cur_promo) {
size_t result = promo_increment(cur_promo,
TenuredGenerationSizeIncrement + _old_gen_size_increment_supplement);
- return align_size_up(result, _intra_generation_alignment);
+ return align_size_up(result, _space_alignment);
}
size_t PSAdaptiveSizePolicy::promo_decrement_aligned_down(size_t cur_promo) {
size_t promo_heap_delta = promo_decrement(cur_promo);
- return align_size_down(promo_heap_delta, _intra_generation_alignment);
+ return align_size_down(promo_heap_delta, _space_alignment);
}
size_t PSAdaptiveSizePolicy::promo_decrement(size_t cur_promo) {
@@ -1135,9 +1132,9 @@
bool is_survivor_overflow,
uint tenuring_threshold,
size_t survivor_limit) {
- assert(survivor_limit >= _intra_generation_alignment,
+ assert(survivor_limit >= _space_alignment,
"survivor_limit too small");
- assert((size_t)align_size_down(survivor_limit, _intra_generation_alignment)
+ assert((size_t)align_size_down(survivor_limit, _space_alignment)
== survivor_limit, "survivor_limit not aligned");
// This method is called even if the tenuring threshold and survivor
@@ -1201,8 +1198,8 @@
// We're trying to pad the survivor size as little as possible without
// overflowing the survivor spaces.
size_t target_size = align_size_up((size_t)_avg_survived->padded_average(),
- _intra_generation_alignment);
- target_size = MAX2(target_size, _intra_generation_alignment);
+ _space_alignment);
+ target_size = MAX2(target_size, _space_alignment);
if (target_size > survivor_limit) {
// Target size is bigger than we can handle. Let's also reduce
--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/psAdaptiveSizePolicy.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/psAdaptiveSizePolicy.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -91,7 +91,7 @@
// for making ergonomic decisions.
double _latest_major_mutator_interval_seconds;
- const size_t _intra_generation_alignment; // alignment for eden, survivors
+ const size_t _space_alignment; // alignment for eden, survivors
const double _gc_minor_pause_goal_sec; // goal for maximum minor gc pause
@@ -229,7 +229,7 @@
PSAdaptiveSizePolicy(size_t init_eden_size,
size_t init_promo_size,
size_t init_survivor_size,
- size_t intra_generation_alignment,
+ size_t space_alignment,
double gc_pause_goal_sec,
double gc_minor_pause_goal_sec,
uint gc_time_ratio);
@@ -378,7 +378,7 @@
// remain almost full anyway (top() will be near end(), but there will be a
// large filler object at the bottom).
const size_t sz = gen_size / MinSurvivorRatio;
- const size_t alignment = _intra_generation_alignment;
+ const size_t alignment = _space_alignment;
return sz > alignment ? align_size_down(sz, alignment) : alignment;
}
--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/psYoungGen.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/psYoungGen.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -103,7 +103,7 @@
// Compute maximum space sizes for performance counters
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
- size_t alignment = heap->intra_heap_alignment();
+ size_t alignment = heap->space_alignment();
size_t size = virtual_space()->reserved_size();
size_t max_survivor_size;
@@ -156,8 +156,9 @@
assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
// Compute sizes
- size_t alignment = heap->intra_heap_alignment();
+ size_t alignment = heap->space_alignment();
size_t size = virtual_space()->committed_size();
+ assert(size >= 3 * alignment, "Young space is not large enough for eden + 2 survivors");
size_t survivor_size = size / InitialSurvivorRatio;
survivor_size = align_size_down(survivor_size, alignment);
@@ -207,7 +208,7 @@
#ifndef PRODUCT
void PSYoungGen::space_invariants() {
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
- const size_t alignment = heap->intra_heap_alignment();
+ const size_t alignment = heap->space_alignment();
// Currently, our eden size cannot shrink to zero
guarantee(eden_space()->capacity_in_bytes() >= alignment, "eden too small");
@@ -491,7 +492,7 @@
char* to_end = (char*)to_space()->end();
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
- const size_t alignment = heap->intra_heap_alignment();
+ const size_t alignment = heap->space_alignment();
const bool maintain_minimum =
(requested_eden_size + 2 * requested_survivor_size) <= min_gen_size();
@@ -840,8 +841,8 @@
size_t PSYoungGen::available_to_live() {
size_t delta_in_survivor = 0;
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
- const size_t space_alignment = heap->intra_heap_alignment();
- const size_t gen_alignment = heap->young_gen_alignment();
+ const size_t space_alignment = heap->space_alignment();
+ const size_t gen_alignment = heap->generation_alignment();
MutableSpace* space_shrinking = NULL;
if (from_space()->end() > to_space()->end()) {
--- a/hotspot/src/share/vm/gc_interface/collectedHeap.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/gc_interface/collectedHeap.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -469,6 +469,10 @@
fill_with_object_impl(start, words, zap);
}
+void CollectedHeap::post_initialize() {
+ collector_policy()->post_heap_initialize();
+}
+
HeapWord* CollectedHeap::allocate_new_tlab(size_t size) {
guarantee(false, "thread-local allocation buffers not supported");
return NULL;
--- a/hotspot/src/share/vm/interpreter/linkResolver.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/interpreter/linkResolver.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -152,11 +152,13 @@
// Could be an Object method inherited into an interface, but still a vtable call.
kind = CallInfo::vtable_call;
} else if (!resolved_klass->is_interface()) {
- // A miranda method. Compute the vtable index.
+ // A default or miranda method. Compute the vtable index.
ResourceMark rm;
klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable();
- index = vt->index_of_miranda(resolved_method->name(),
- resolved_method->signature());
+ index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
+ resolved_method);
+ assert(index >= 0 , "we should have valid vtable index at this point");
+
kind = CallInfo::vtable_call;
} else if (resolved_method->has_vtable_index()) {
// Can occur if an interface redeclares a method of Object.
@@ -279,7 +281,7 @@
}
int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
- methodHandle resolved_method, TRAPS) {
+ methodHandle resolved_method) {
int vtable_index = Method::invalid_vtable_index;
Symbol* name = resolved_method->name();
@@ -295,7 +297,7 @@
}
if (vtable_index == Method::invalid_vtable_index) {
// get vtable_index for miranda methods
- ResourceMark rm(THREAD);
+ ResourceMark rm;
klassVtable *vt = InstanceKlass::cast(klass())->vtable();
vtable_index = vt->index_of_miranda(name, signature);
}
@@ -691,7 +693,7 @@
);
resolved_method->access_flags().print_on(tty);
if (resolved_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
if (resolved_method->is_overpass()) {
tty->print("overpass");
@@ -937,7 +939,7 @@
);
resolved_method->access_flags().print_on(tty);
if (resolved_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
if (resolved_method->is_overpass()) {
tty->print("overpass");
@@ -1017,7 +1019,7 @@
);
sel_method->access_flags().print_on(tty);
if (sel_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
if (sel_method->is_overpass()) {
tty->print("overpass");
@@ -1081,7 +1083,7 @@
);
resolved_method->access_flags().print_on(tty);
if (resolved_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
if (resolved_method->is_overpass()) {
tty->print("overpass");
@@ -1118,7 +1120,7 @@
// do lookup based on receiver klass using the vtable index
if (resolved_method->method_holder()->is_interface()) { // miranda method
vtable_index = vtable_index_of_interface_method(resolved_klass,
- resolved_method, CHECK);
+ resolved_method);
assert(vtable_index >= 0 , "we should have valid vtable index at this point");
InstanceKlass* inst = InstanceKlass::cast(recv_klass());
@@ -1175,7 +1177,7 @@
);
selected_method->access_flags().print_on(tty);
if (selected_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
if (selected_method->is_overpass()) {
tty->print("overpass");
@@ -1268,14 +1270,6 @@
sel_method->name(),
sel_method->signature()));
}
- // setup result
- if (!resolved_method->has_itable_index()) {
- int vtable_index = resolved_method->vtable_index();
- assert(vtable_index == sel_method->vtable_index(), "sanity check");
- result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
- return;
- }
- int itable_index = resolved_method()->itable_index();
if (TraceItables && Verbose) {
ResourceMark rm(THREAD);
@@ -1289,14 +1283,22 @@
);
sel_method->access_flags().print_on(tty);
if (sel_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
if (sel_method->is_overpass()) {
tty->print("overpass");
}
tty->cr();
}
- result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
+ // setup result
+ if (!resolved_method->has_itable_index()) {
+ int vtable_index = resolved_method->vtable_index();
+ assert(vtable_index == sel_method->vtable_index(), "sanity check");
+ result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
+ } else {
+ int itable_index = resolved_method()->itable_index();
+ result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
+ }
}
--- a/hotspot/src/share/vm/interpreter/linkResolver.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/interpreter/linkResolver.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -130,7 +130,6 @@
static void lookup_polymorphic_method (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature,
KlassHandle current_klass, Handle *appendix_result_or_null, Handle *method_type_result, TRAPS);
- static int vtable_index_of_interface_method(KlassHandle klass, methodHandle resolved_method, TRAPS);
static void resolve_klass (KlassHandle& result, constantPoolHandle pool, int index, TRAPS);
static void resolve_pool (KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS);
@@ -186,6 +185,7 @@
static methodHandle resolve_interface_call_or_null(KlassHandle receiver_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass);
static methodHandle resolve_static_call_or_null (KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass);
static methodHandle resolve_special_call_or_null (KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass);
+ static int vtable_index_of_interface_method(KlassHandle klass, methodHandle resolved_method);
// same as above for compile-time resolution; returns vtable_index if current_klass if linked
static int resolve_virtual_vtable_index (KlassHandle receiver_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass);
--- a/hotspot/src/share/vm/interpreter/rewriter.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/interpreter/rewriter.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -70,21 +70,21 @@
}
// Unrewrite the bytecodes if an error occurs.
-void Rewriter::restore_bytecodes() {
+void Rewriter::restore_bytecodes(TRAPS) {
int len = _methods->length();
for (int i = len-1; i >= 0; i--) {
Method* method = _methods->at(i);
- scan_method(method, true);
+ scan_method(method, true, CHECK);
}
}
// Creates a constant pool cache given a CPC map
void Rewriter::make_constant_pool_cache(TRAPS) {
- const int length = _cp_cache_map.length();
ClassLoaderData* loader_data = _pool->pool_holder()->class_loader_data();
ConstantPoolCache* cache =
- ConstantPoolCache::allocate(loader_data, length, _cp_cache_map,
+ ConstantPoolCache::allocate(loader_data, _cp_cache_map,
+ _invokedynamic_cp_cache_map,
_invokedynamic_references_map, CHECK);
// initialize object cache in constant pool
@@ -154,6 +154,31 @@
}
}
+// If the constant pool entry for invokespecial is InterfaceMethodref,
+// we need to add a separate cpCache entry for its resolution, because it is
+// different than the resolution for invokeinterface with InterfaceMethodref.
+// These cannot share cpCache entries. It's unclear if all invokespecial to
+// InterfaceMethodrefs would resolve to the same thing so a new cpCache entry
+// is created for each one. This was added with lambda.
+void Rewriter::rewrite_invokespecial(address bcp, int offset, bool reverse, TRAPS) {
+ static int count = 0;
+ address p = bcp + offset;
+ if (!reverse) {
+ int cp_index = Bytes::get_Java_u2(p);
+ int cache_index = add_invokespecial_cp_cache_entry(cp_index);
+ if (cache_index != (int)(jushort) cache_index) {
+ THROW_MSG(vmSymbols::java_lang_InternalError(),
+ "This classfile overflows invokespecial for interfaces "
+ "and cannot be loaded");
+ }
+ Bytes::put_native_u2(p, cache_index);
+ } else {
+ int cache_index = Bytes::get_native_u2(p);
+ int cp_index = cp_cache_entry_pool_index(cache_index);
+ Bytes::put_Java_u2(p, cp_index);
+ }
+}
+
// Adjust the invocation bytecode for a signature-polymorphic method (MethodHandle.invoke, etc.)
void Rewriter::maybe_rewrite_invokehandle(address opc, int cp_index, int cache_index, bool reverse) {
@@ -203,7 +228,7 @@
if (!reverse) {
int cp_index = Bytes::get_Java_u2(p);
int cache_index = add_invokedynamic_cp_cache_entry(cp_index);
- add_invokedynamic_resolved_references_entries(cp_index, cache_index);
+ int resolved_index = add_invokedynamic_resolved_references_entries(cp_index, cache_index);
// Replace the trailing four bytes with a CPC index for the dynamic
// call site. Unlike other CPC entries, there is one per bytecode,
// not just one per distinct CP entry. In other words, the
@@ -212,13 +237,20 @@
// all these entries. That is the main reason invokedynamic
// must have a five-byte instruction format. (Of course, other JVM
// implementations can use the bytes for other purposes.)
+ // Note: We use native_u4 format exclusively for 4-byte indexes.
Bytes::put_native_u4(p, ConstantPool::encode_invokedynamic_index(cache_index));
- // Note: We use native_u4 format exclusively for 4-byte indexes.
+ // add the bcp in case we need to patch this bytecode if we also find a
+ // invokespecial/InterfaceMethodref in the bytecode stream
+ _patch_invokedynamic_bcps->push(p);
+ _patch_invokedynamic_refs->push(resolved_index);
} else {
- // callsite index
int cache_index = ConstantPool::decode_invokedynamic_index(
Bytes::get_native_u4(p));
- int cp_index = cp_cache_entry_pool_index(cache_index);
+ // We will reverse the bytecode rewriting _after_ adjusting them.
+ // Adjust the cache index by offset to the invokedynamic entries in the
+ // cpCache plus the delta if the invokedynamic bytecodes were adjusted.
+ cache_index = cp_cache_delta() + _first_iteration_cp_cache_limit;
+ int cp_index = invokedynamic_cp_cache_entry_pool_index(cache_index);
assert(_pool->tag_at(cp_index).is_invoke_dynamic(), "wrong index");
// zero out 4 bytes
Bytes::put_Java_u4(p, 0);
@@ -226,6 +258,34 @@
}
}
+void Rewriter::patch_invokedynamic_bytecodes() {
+ // If the end of the cp_cache is the same as after initializing with the
+ // cpool, nothing needs to be done. Invokedynamic bytecodes are at the
+ // correct offsets. ie. no invokespecials added
+ int delta = cp_cache_delta();
+ if (delta > 0) {
+ int length = _patch_invokedynamic_bcps->length();
+ assert(length == _patch_invokedynamic_refs->length(),
+ "lengths should match");
+ for (int i = 0; i < length; i++) {
+ address p = _patch_invokedynamic_bcps->at(i);
+ int cache_index = ConstantPool::decode_invokedynamic_index(
+ Bytes::get_native_u4(p));
+ Bytes::put_native_u4(p, ConstantPool::encode_invokedynamic_index(cache_index + delta));
+
+ // invokedynamic resolved references map also points to cp cache and must
+ // add delta to each.
+ int resolved_index = _patch_invokedynamic_refs->at(i);
+ for (int entry = 0; entry < ConstantPoolCacheEntry::_indy_resolved_references_entries; entry++) {
+ assert(_invokedynamic_references_map[resolved_index+entry] == cache_index,
+ "should be the same index");
+ _invokedynamic_references_map.at_put(resolved_index+entry,
+ cache_index + delta);
+ }
+ }
+ }
+}
+
// Rewrite some ldc bytecodes to _fast_aldc
void Rewriter::maybe_rewrite_ldc(address bcp, int offset, bool is_wide,
@@ -269,7 +329,7 @@
// Rewrites a method given the index_map information
-void Rewriter::scan_method(Method* method, bool reverse) {
+void Rewriter::scan_method(Method* method, bool reverse, TRAPS) {
int nof_jsrs = 0;
bool has_monitor_bytecodes = false;
@@ -329,12 +389,25 @@
#endif
break;
}
+
+ case Bytecodes::_invokespecial : {
+ int offset = prefix_length + 1;
+ address p = bcp + offset;
+ int cp_index = Bytes::get_Java_u2(p);
+ // InterfaceMethodref
+ if (_pool->tag_at(cp_index).is_interface_method()) {
+ rewrite_invokespecial(bcp, offset, reverse, CHECK);
+ } else {
+ rewrite_member_reference(bcp, offset, reverse);
+ }
+ break;
+ }
+
case Bytecodes::_getstatic : // fall through
case Bytecodes::_putstatic : // fall through
case Bytecodes::_getfield : // fall through
case Bytecodes::_putfield : // fall through
case Bytecodes::_invokevirtual : // fall through
- case Bytecodes::_invokespecial : // fall through
case Bytecodes::_invokestatic :
case Bytecodes::_invokeinterface:
case Bytecodes::_invokehandle : // if reverse=true
@@ -426,16 +499,21 @@
for (int i = len-1; i >= 0; i--) {
Method* method = _methods->at(i);
- scan_method(method);
+ scan_method(method, false, CHECK); // If you get an error here,
+ // there is no reversing bytecodes
}
+ // May have to fix invokedynamic bytecodes if invokestatic/InterfaceMethodref
+ // entries had to be added.
+ patch_invokedynamic_bytecodes();
+
// allocate constant pool cache, now that we've seen all the bytecodes
make_constant_pool_cache(THREAD);
// Restore bytecodes to their unrewritten state if there are exceptions
// rewriting bytecodes or allocating the cpCache
if (HAS_PENDING_EXCEPTION) {
- restore_bytecodes();
+ restore_bytecodes(CATCH);
return;
}
@@ -452,7 +530,7 @@
// relocating bytecodes. If some are relocated, that is ok because that
// doesn't affect constant pool to cpCache rewriting.
if (HAS_PENDING_EXCEPTION) {
- restore_bytecodes();
+ restore_bytecodes(CATCH);
return;
}
// Method might have gotten rewritten.
--- a/hotspot/src/share/vm/interpreter/rewriter.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/interpreter/rewriter.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -46,55 +46,102 @@
intArray _method_handle_invokers;
int _resolved_reference_limit;
+ // For mapping invokedynamic bytecodes, which are discovered during method
+ // scanning. The invokedynamic entries are added at the end of the cpCache.
+ // If there are any invokespecial/InterfaceMethodref special case bytecodes,
+ // these entries are added before invokedynamic entries so that the
+ // invokespecial bytecode 16 bit index doesn't overflow.
+ intStack _invokedynamic_cp_cache_map;
+
+ // For patching.
+ GrowableArray<address>* _patch_invokedynamic_bcps;
+ GrowableArray<int>* _patch_invokedynamic_refs;
+
void init_maps(int length) {
_cp_map.initialize(length, -1);
// Choose an initial value large enough that we don't get frequent
// calls to grow().
- _cp_cache_map.initialize(length / 2);
+ _cp_cache_map.initialize(length/2);
// Also cache resolved objects, in another different cache.
_reference_map.initialize(length, -1);
- _resolved_references_map.initialize(length / 2);
- _invokedynamic_references_map.initialize(length / 2);
+ _resolved_references_map.initialize(length/2);
+ _invokedynamic_references_map.initialize(length/2);
_resolved_reference_limit = -1;
- DEBUG_ONLY(_cp_cache_index_limit = -1);
+ _first_iteration_cp_cache_limit = -1;
+
+ // invokedynamic specific fields
+ _invokedynamic_cp_cache_map.initialize(length/4);
+ _patch_invokedynamic_bcps = new GrowableArray<address>(length/4);
+ _patch_invokedynamic_refs = new GrowableArray<int>(length/4);
}
- int _cp_cache_index_limit;
+ int _first_iteration_cp_cache_limit;
void record_map_limits() {
-#ifdef ASSERT
- // Record initial size of the two arrays generated for the CP cache:
- _cp_cache_index_limit = _cp_cache_map.length();
-#endif //ASSERT
+ // Record initial size of the two arrays generated for the CP cache
+ // relative to walking the constant pool.
+ _first_iteration_cp_cache_limit = _cp_cache_map.length();
_resolved_reference_limit = _resolved_references_map.length();
}
+ int cp_cache_delta() {
+ // How many cp cache entries were added since recording map limits after
+ // cp cache initialization?
+ assert(_first_iteration_cp_cache_limit != -1, "only valid after first iteration");
+ return _cp_cache_map.length() - _first_iteration_cp_cache_limit;
+ }
+
int cp_entry_to_cp_cache(int i) { assert(has_cp_cache(i), "oob"); return _cp_map[i]; }
bool has_cp_cache(int i) { return (uint)i < (uint)_cp_map.length() && _cp_map[i] >= 0; }
+ int add_map_entry(int cp_index, intArray* cp_map, intStack* cp_cache_map) {
+ assert(cp_map->at(cp_index) == -1, "not twice on same cp_index");
+ int cache_index = cp_cache_map->append(cp_index);
+ cp_map->at_put(cp_index, cache_index);
+ return cache_index;
+ }
+
int add_cp_cache_entry(int cp_index) {
assert(_pool->tag_at(cp_index).value() != JVM_CONSTANT_InvokeDynamic, "use indy version");
- assert(_cp_map[cp_index] == -1, "not twice on same cp_index");
- assert(_cp_cache_index_limit == -1, "do not add cache entries after first iteration");
- int cache_index = _cp_cache_map.append(cp_index);
- _cp_map.at_put(cp_index, cache_index);
+ assert(_first_iteration_cp_cache_limit == -1, "do not add cache entries after first iteration");
+ int cache_index = add_map_entry(cp_index, &_cp_map, &_cp_cache_map);
assert(cp_entry_to_cp_cache(cp_index) == cache_index, "");
assert(cp_cache_entry_pool_index(cache_index) == cp_index, "");
return cache_index;
}
- // add a new CP cache entry beyond the normal cache (for invokedynamic only)
int add_invokedynamic_cp_cache_entry(int cp_index) {
assert(_pool->tag_at(cp_index).value() == JVM_CONSTANT_InvokeDynamic, "use non-indy version");
- assert(_cp_map[cp_index] == -1, "do not map from cp_index");
- assert(_cp_cache_index_limit >= 0, "add indy cache entries after first iteration");
+ assert(_first_iteration_cp_cache_limit >= 0, "add indy cache entries after first iteration");
+ // add to the invokedynamic index map.
+ int cache_index = _invokedynamic_cp_cache_map.append(cp_index);
+ // do not update _cp_map, since the mapping is one-to-many
+ assert(invokedynamic_cp_cache_entry_pool_index(cache_index) == cp_index, "");
+ // this index starts at one but in the bytecode it's appended to the end.
+ return cache_index + _first_iteration_cp_cache_limit;
+ }
+
+ int invokedynamic_cp_cache_entry_pool_index(int cache_index) {
+ int cp_index = _invokedynamic_cp_cache_map[cache_index];
+ return cp_index;
+ }
+
+ // add a new CP cache entry beyond the normal cache for the special case of
+ // invokespecial with InterfaceMethodref as cpool operand.
+ int add_invokespecial_cp_cache_entry(int cp_index) {
+ assert(_first_iteration_cp_cache_limit >= 0, "add these special cache entries after first iteration");
+ // Don't add InterfaceMethodref if it already exists at the end.
+ for (int i = _first_iteration_cp_cache_limit; i < _cp_cache_map.length(); i++) {
+ if (cp_cache_entry_pool_index(i) == cp_index) {
+ return i;
+ }
+ }
int cache_index = _cp_cache_map.append(cp_index);
- assert(cache_index >= _cp_cache_index_limit, "");
+ assert(cache_index >= _first_iteration_cp_cache_limit, "");
// do not update _cp_map, since the mapping is one-to-many
assert(cp_cache_entry_pool_index(cache_index) == cp_index, "");
return cache_index;
}
- // fix duplicated code later
int cp_entry_to_resolved_references(int cp_index) const {
assert(has_entry_in_resolved_references(cp_index), "oob");
return _reference_map[cp_index];
@@ -105,10 +152,7 @@
// add a new entry to the resolved_references map
int add_resolved_references_entry(int cp_index) {
- assert(_reference_map[cp_index] == -1, "not twice on same cp_index");
- assert(_resolved_reference_limit == -1, "do not add CP refs after first iteration");
- int ref_index = _resolved_references_map.append(cp_index);
- _reference_map.at_put(cp_index, ref_index);
+ int ref_index = add_map_entry(cp_index, &_reference_map, &_resolved_references_map);
assert(cp_entry_to_resolved_references(cp_index) == ref_index, "");
return ref_index;
}
@@ -137,7 +181,7 @@
// Access the contents of _cp_cache_map to determine CP cache layout.
int cp_cache_entry_pool_index(int cache_index) {
int cp_index = _cp_cache_map[cache_index];
- return cp_index;
+ return cp_index;
}
// All the work goes in here:
@@ -145,14 +189,18 @@
void compute_index_maps();
void make_constant_pool_cache(TRAPS);
- void scan_method(Method* m, bool reverse = false);
+ void scan_method(Method* m, bool reverse, TRAPS);
void rewrite_Object_init(methodHandle m, TRAPS);
- void rewrite_member_reference(address bcp, int offset, bool reverse = false);
- void maybe_rewrite_invokehandle(address opc, int cp_index, int cache_index, bool reverse = false);
- void rewrite_invokedynamic(address bcp, int offset, bool reverse = false);
- void maybe_rewrite_ldc(address bcp, int offset, bool is_wide, bool reverse = false);
+ void rewrite_member_reference(address bcp, int offset, bool reverse);
+ void maybe_rewrite_invokehandle(address opc, int cp_index, int cache_index, bool reverse);
+ void rewrite_invokedynamic(address bcp, int offset, bool reverse);
+ void maybe_rewrite_ldc(address bcp, int offset, bool is_wide, bool reverse);
+ void rewrite_invokespecial(address bcp, int offset, bool reverse, TRAPS);
+
+ void patch_invokedynamic_bytecodes();
+
// Revert bytecodes in case of an exception.
- void restore_bytecodes();
+ void restore_bytecodes(TRAPS);
static methodHandle rewrite_jsrs(methodHandle m, TRAPS);
public:
--- a/hotspot/src/share/vm/memory/collectorPolicy.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/memory/collectorPolicy.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -47,54 +47,107 @@
// CollectorPolicy methods.
+CollectorPolicy::CollectorPolicy() :
+ _space_alignment(0),
+ _heap_alignment(0),
+ _initial_heap_byte_size(InitialHeapSize),
+ _max_heap_byte_size(MaxHeapSize),
+ _min_heap_byte_size(Arguments::min_heap_size()),
+ _max_heap_size_cmdline(false),
+ _size_policy(NULL),
+ _should_clear_all_soft_refs(false),
+ _all_soft_refs_clear(false)
+{}
+
+#ifdef ASSERT
+void CollectorPolicy::assert_flags() {
+ assert(InitialHeapSize <= MaxHeapSize, "Ergonomics decided on incompatible initial and maximum heap sizes");
+ assert(InitialHeapSize % _heap_alignment == 0, "InitialHeapSize alignment");
+ assert(MaxHeapSize % _heap_alignment == 0, "MaxHeapSize alignment");
+}
+
+void CollectorPolicy::assert_size_info() {
+ assert(InitialHeapSize == _initial_heap_byte_size, "Discrepancy between InitialHeapSize flag and local storage");
+ assert(MaxHeapSize == _max_heap_byte_size, "Discrepancy between MaxHeapSize flag and local storage");
+ assert(_max_heap_byte_size >= _min_heap_byte_size, "Ergonomics decided on incompatible minimum and maximum heap sizes");
+ assert(_initial_heap_byte_size >= _min_heap_byte_size, "Ergonomics decided on incompatible initial and minimum heap sizes");
+ assert(_max_heap_byte_size >= _initial_heap_byte_size, "Ergonomics decided on incompatible initial and maximum heap sizes");
+ assert(_min_heap_byte_size % _heap_alignment == 0, "min_heap_byte_size alignment");
+ assert(_initial_heap_byte_size % _heap_alignment == 0, "initial_heap_byte_size alignment");
+ assert(_max_heap_byte_size % _heap_alignment == 0, "max_heap_byte_size alignment");
+}
+#endif // ASSERT
+
void CollectorPolicy::initialize_flags() {
- assert(_max_alignment >= _min_alignment,
- err_msg("max_alignment: " SIZE_FORMAT " less than min_alignment: " SIZE_FORMAT,
- _max_alignment, _min_alignment));
- assert(_max_alignment % _min_alignment == 0,
- err_msg("max_alignment: " SIZE_FORMAT " not aligned by min_alignment: " SIZE_FORMAT,
- _max_alignment, _min_alignment));
+ assert(_space_alignment != 0, "Space alignment not set up properly");
+ assert(_heap_alignment != 0, "Heap alignment not set up properly");
+ assert(_heap_alignment >= _space_alignment,
+ err_msg("heap_alignment: " SIZE_FORMAT " less than space_alignment: " SIZE_FORMAT,
+ _heap_alignment, _space_alignment));
+ assert(_heap_alignment % _space_alignment == 0,
+ err_msg("heap_alignment: " SIZE_FORMAT " not aligned by space_alignment: " SIZE_FORMAT,
+ _heap_alignment, _space_alignment));
- if (MaxHeapSize < InitialHeapSize) {
- vm_exit_during_initialization("Incompatible initial and maximum heap sizes specified");
+ if (FLAG_IS_CMDLINE(MaxHeapSize)) {
+ if (FLAG_IS_CMDLINE(InitialHeapSize) && InitialHeapSize > MaxHeapSize) {
+ vm_exit_during_initialization("Initial heap size set to a larger value than the maximum heap size");
+ }
+ if (_min_heap_byte_size != 0 && MaxHeapSize < _min_heap_byte_size) {
+ vm_exit_during_initialization("Incompatible minimum and maximum heap sizes specified");
+ }
+ _max_heap_size_cmdline = true;
}
- MinHeapDeltaBytes = align_size_up(MinHeapDeltaBytes, _min_alignment);
+ // Check heap parameter properties
+ if (InitialHeapSize < M) {
+ vm_exit_during_initialization("Too small initial heap");
+ }
+ if (_min_heap_byte_size < M) {
+ vm_exit_during_initialization("Too small minimum heap");
+ }
+
+ // User inputs from -Xmx and -Xms must be aligned
+ _min_heap_byte_size = align_size_up(_min_heap_byte_size, _heap_alignment);
+ uintx aligned_initial_heap_size = align_size_up(InitialHeapSize, _heap_alignment);
+ uintx aligned_max_heap_size = align_size_up(MaxHeapSize, _heap_alignment);
+
+ // Write back to flags if the values changed
+ if (aligned_initial_heap_size != InitialHeapSize) {
+ FLAG_SET_ERGO(uintx, InitialHeapSize, aligned_initial_heap_size);
+ }
+ if (aligned_max_heap_size != MaxHeapSize) {
+ FLAG_SET_ERGO(uintx, MaxHeapSize, aligned_max_heap_size);
+ }
+
+ if (FLAG_IS_CMDLINE(InitialHeapSize) && _min_heap_byte_size != 0 &&
+ InitialHeapSize < _min_heap_byte_size) {
+ vm_exit_during_initialization("Incompatible minimum and initial heap sizes specified");
+ }
+ if (!FLAG_IS_DEFAULT(InitialHeapSize) && InitialHeapSize > MaxHeapSize) {
+ FLAG_SET_ERGO(uintx, MaxHeapSize, InitialHeapSize);
+ } else if (!FLAG_IS_DEFAULT(MaxHeapSize) && InitialHeapSize > MaxHeapSize) {
+ FLAG_SET_ERGO(uintx, InitialHeapSize, MaxHeapSize);
+ if (InitialHeapSize < _min_heap_byte_size) {
+ _min_heap_byte_size = InitialHeapSize;
+ }
+ }
+
+ _initial_heap_byte_size = InitialHeapSize;
+ _max_heap_byte_size = MaxHeapSize;
+
+ FLAG_SET_ERGO(uintx, MinHeapDeltaBytes, align_size_up(MinHeapDeltaBytes, _space_alignment));
+
+ DEBUG_ONLY(CollectorPolicy::assert_flags();)
}
void CollectorPolicy::initialize_size_info() {
- // User inputs from -mx and ms must be aligned
- _min_heap_byte_size = align_size_up(Arguments::min_heap_size(), _min_alignment);
- _initial_heap_byte_size = align_size_up(InitialHeapSize, _min_alignment);
- _max_heap_byte_size = align_size_up(MaxHeapSize, _max_alignment);
-
- // Check heap parameter properties
- if (_initial_heap_byte_size < M) {
- vm_exit_during_initialization("Too small initial heap");
- }
- // Check heap parameter properties
- if (_min_heap_byte_size < M) {
- vm_exit_during_initialization("Too small minimum heap");
- }
- if (_initial_heap_byte_size <= NewSize) {
- // make sure there is at least some room in old space
- vm_exit_during_initialization("Too small initial heap for new size specified");
- }
- if (_max_heap_byte_size < _min_heap_byte_size) {
- vm_exit_during_initialization("Incompatible minimum and maximum heap sizes specified");
- }
- if (_initial_heap_byte_size < _min_heap_byte_size) {
- vm_exit_during_initialization("Incompatible minimum and initial heap sizes specified");
- }
- if (_max_heap_byte_size < _initial_heap_byte_size) {
- vm_exit_during_initialization("Incompatible initial and maximum heap sizes specified");
- }
-
if (PrintGCDetails && Verbose) {
gclog_or_tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
SIZE_FORMAT " Maximum heap " SIZE_FORMAT,
_min_heap_byte_size, _initial_heap_byte_size, _max_heap_byte_size);
}
+
+ DEBUG_ONLY(CollectorPolicy::assert_size_info();)
}
bool CollectorPolicy::use_should_clear_all_soft_refs(bool v) {
@@ -105,7 +158,6 @@
GenRemSet* CollectorPolicy::create_rem_set(MemRegion whole_heap,
int max_covered_regions) {
- assert(rem_set_name() == GenRemSet::CardTable, "unrecognized GenRemSet::Name");
return new CardTableRS(whole_heap, max_covered_regions);
}
@@ -119,7 +171,7 @@
_all_soft_refs_clear = true;
}
-size_t CollectorPolicy::compute_max_alignment() {
+size_t CollectorPolicy::compute_heap_alignment() {
// The card marking array and the offset arrays for old generations are
// committed in os pages as well. Make sure they are entirely full (to
// avoid partial page problems), e.g. if 512 bytes heap corresponds to 1
@@ -146,18 +198,21 @@
// GenCollectorPolicy methods.
+GenCollectorPolicy::GenCollectorPolicy() :
+ _min_gen0_size(0),
+ _initial_gen0_size(0),
+ _max_gen0_size(0),
+ _gen_alignment(0),
+ _generations(NULL)
+{}
+
size_t GenCollectorPolicy::scale_by_NewRatio_aligned(size_t base_size) {
- size_t x = base_size / (NewRatio+1);
- size_t new_gen_size = x > _min_alignment ?
- align_size_down(x, _min_alignment) :
- _min_alignment;
- return new_gen_size;
+ return align_size_down_bounded(base_size / (NewRatio + 1), _gen_alignment);
}
size_t GenCollectorPolicy::bound_minus_alignment(size_t desired_size,
size_t maximum_size) {
- size_t alignment = _min_alignment;
- size_t max_minus = maximum_size - alignment;
+ size_t max_minus = maximum_size - _gen_alignment;
return desired_size < max_minus ? desired_size : max_minus;
}
@@ -165,7 +220,7 @@
void GenCollectorPolicy::initialize_size_policy(size_t init_eden_size,
size_t init_promo_size,
size_t init_survivor_size) {
- const double max_gc_pause_sec = ((double) MaxGCPauseMillis)/1000.0;
+ const double max_gc_pause_sec = ((double) MaxGCPauseMillis) / 1000.0;
_size_policy = new AdaptiveSizePolicy(init_eden_size,
init_promo_size,
init_survivor_size,
@@ -173,100 +228,181 @@
GCTimeRatio);
}
+size_t GenCollectorPolicy::young_gen_size_lower_bound() {
+ // The young generation must be aligned and have room for eden + two survivors
+ return align_size_up(3 * _space_alignment, _gen_alignment);
+}
+
+#ifdef ASSERT
+void GenCollectorPolicy::assert_flags() {
+ CollectorPolicy::assert_flags();
+ assert(NewSize >= _min_gen0_size, "Ergonomics decided on a too small young gen size");
+ assert(NewSize <= MaxNewSize, "Ergonomics decided on incompatible initial and maximum young gen sizes");
+ assert(FLAG_IS_DEFAULT(MaxNewSize) || MaxNewSize < MaxHeapSize, "Ergonomics decided on incompatible maximum young gen and heap sizes");
+ assert(NewSize % _gen_alignment == 0, "NewSize alignment");
+ assert(FLAG_IS_DEFAULT(MaxNewSize) || MaxNewSize % _gen_alignment == 0, "MaxNewSize alignment");
+}
+
+void TwoGenerationCollectorPolicy::assert_flags() {
+ GenCollectorPolicy::assert_flags();
+ assert(OldSize + NewSize <= MaxHeapSize, "Ergonomics decided on incompatible generation and heap sizes");
+ assert(OldSize % _gen_alignment == 0, "OldSize alignment");
+}
+
+void GenCollectorPolicy::assert_size_info() {
+ CollectorPolicy::assert_size_info();
+ // GenCollectorPolicy::initialize_size_info may update the MaxNewSize
+ assert(MaxNewSize < MaxHeapSize, "Ergonomics decided on incompatible maximum young and heap sizes");
+ assert(NewSize == _initial_gen0_size, "Discrepancy between NewSize flag and local storage");
+ assert(MaxNewSize == _max_gen0_size, "Discrepancy between MaxNewSize flag and local storage");
+ assert(_min_gen0_size <= _initial_gen0_size, "Ergonomics decided on incompatible minimum and initial young gen sizes");
+ assert(_initial_gen0_size <= _max_gen0_size, "Ergonomics decided on incompatible initial and maximum young gen sizes");
+ assert(_min_gen0_size % _gen_alignment == 0, "_min_gen0_size alignment");
+ assert(_initial_gen0_size % _gen_alignment == 0, "_initial_gen0_size alignment");
+ assert(_max_gen0_size % _gen_alignment == 0, "_max_gen0_size alignment");
+}
+
+void TwoGenerationCollectorPolicy::assert_size_info() {
+ GenCollectorPolicy::assert_size_info();
+ assert(OldSize == _initial_gen1_size, "Discrepancy between OldSize flag and local storage");
+ assert(_min_gen1_size <= _initial_gen1_size, "Ergonomics decided on incompatible minimum and initial old gen sizes");
+ assert(_initial_gen1_size <= _max_gen1_size, "Ergonomics decided on incompatible initial and maximum old gen sizes");
+ assert(_max_gen1_size % _gen_alignment == 0, "_max_gen1_size alignment");
+ assert(_initial_gen1_size % _gen_alignment == 0, "_initial_gen1_size alignment");
+ assert(_max_heap_byte_size <= (_max_gen0_size + _max_gen1_size), "Total maximum heap sizes must be sum of generation maximum sizes");
+}
+#endif // ASSERT
+
void GenCollectorPolicy::initialize_flags() {
- // All sizes must be multiples of the generation granularity.
- _min_alignment = (uintx) Generation::GenGrain;
- _max_alignment = compute_max_alignment();
-
CollectorPolicy::initialize_flags();
- // All generational heaps have a youngest gen; handle those flags here.
+ assert(_gen_alignment != 0, "Generation alignment not set up properly");
+ assert(_heap_alignment >= _gen_alignment,
+ err_msg("heap_alignment: " SIZE_FORMAT " less than gen_alignment: " SIZE_FORMAT,
+ _heap_alignment, _gen_alignment));
+ assert(_gen_alignment % _space_alignment == 0,
+ err_msg("gen_alignment: " SIZE_FORMAT " not aligned by space_alignment: " SIZE_FORMAT,
+ _gen_alignment, _space_alignment));
+ assert(_heap_alignment % _gen_alignment == 0,
+ err_msg("heap_alignment: " SIZE_FORMAT " not aligned by gen_alignment: " SIZE_FORMAT,
+ _heap_alignment, _gen_alignment));
+
+ // All generational heaps have a youngest gen; handle those flags here
- // Adjust max size parameters
- if (NewSize > MaxNewSize) {
- MaxNewSize = NewSize;
+ // Make sure the heap is large enough for two generations
+ uintx smallest_new_size = young_gen_size_lower_bound();
+ uintx smallest_heap_size = align_size_up(smallest_new_size + align_size_up(_space_alignment, _gen_alignment),
+ _heap_alignment);
+ if (MaxHeapSize < smallest_heap_size) {
+ FLAG_SET_ERGO(uintx, MaxHeapSize, smallest_heap_size);
+ _max_heap_byte_size = MaxHeapSize;
}
- NewSize = align_size_down(NewSize, _min_alignment);
- MaxNewSize = align_size_down(MaxNewSize, _min_alignment);
+ // If needed, synchronize _min_heap_byte size and _initial_heap_byte_size
+ if (_min_heap_byte_size < smallest_heap_size) {
+ _min_heap_byte_size = smallest_heap_size;
+ if (InitialHeapSize < _min_heap_byte_size) {
+ FLAG_SET_ERGO(uintx, InitialHeapSize, smallest_heap_size);
+ _initial_heap_byte_size = smallest_heap_size;
+ }
+ }
- // Check validity of heap flags
- assert(NewSize % _min_alignment == 0, "eden space alignment");
- assert(MaxNewSize % _min_alignment == 0, "survivor space alignment");
+ // Now take the actual NewSize into account. We will silently increase NewSize
+ // if the user specified a smaller value.
+ smallest_new_size = MAX2(smallest_new_size, (uintx)align_size_down(NewSize, _gen_alignment));
+ if (smallest_new_size != NewSize) {
+ FLAG_SET_ERGO(uintx, NewSize, smallest_new_size);
+ }
+ _initial_gen0_size = NewSize;
+
+ if (!FLAG_IS_DEFAULT(MaxNewSize)) {
+ uintx min_new_size = MAX2(_gen_alignment, _min_gen0_size);
- if (NewSize < 3 * _min_alignment) {
- // make sure there room for eden and two survivor spaces
- vm_exit_during_initialization("Too small new size specified");
+ if (MaxNewSize >= MaxHeapSize) {
+ // Make sure there is room for an old generation
+ uintx smaller_max_new_size = MaxHeapSize - _gen_alignment;
+ if (FLAG_IS_CMDLINE(MaxNewSize)) {
+ warning("MaxNewSize (" SIZE_FORMAT "k) is equal to or greater than the entire "
+ "heap (" SIZE_FORMAT "k). A new max generation size of " SIZE_FORMAT "k will be used.",
+ MaxNewSize/K, MaxHeapSize/K, smaller_max_new_size/K);
+ }
+ FLAG_SET_ERGO(uintx, MaxNewSize, smaller_max_new_size);
+ if (NewSize > MaxNewSize) {
+ FLAG_SET_ERGO(uintx, NewSize, MaxNewSize);
+ _initial_gen0_size = NewSize;
+ }
+ } else if (MaxNewSize < min_new_size) {
+ FLAG_SET_ERGO(uintx, MaxNewSize, min_new_size);
+ } else if (!is_size_aligned(MaxNewSize, _gen_alignment)) {
+ FLAG_SET_ERGO(uintx, MaxNewSize, align_size_down(MaxNewSize, _gen_alignment));
+ }
+ _max_gen0_size = MaxNewSize;
}
+
+ if (NewSize > MaxNewSize) {
+ // At this point this should only happen if the user specifies a large NewSize and/or
+ // a small (but not too small) MaxNewSize.
+ if (FLAG_IS_CMDLINE(MaxNewSize)) {
+ warning("NewSize (" SIZE_FORMAT "k) is greater than the MaxNewSize (" SIZE_FORMAT "k). "
+ "A new max generation size of " SIZE_FORMAT "k will be used.",
+ NewSize/K, MaxNewSize/K, NewSize/K);
+ }
+ FLAG_SET_ERGO(uintx, MaxNewSize, NewSize);
+ _max_gen0_size = MaxNewSize;
+ }
+
if (SurvivorRatio < 1 || NewRatio < 1) {
vm_exit_during_initialization("Invalid young gen ratio specified");
}
+
+ DEBUG_ONLY(GenCollectorPolicy::assert_flags();)
}
void TwoGenerationCollectorPolicy::initialize_flags() {
GenCollectorPolicy::initialize_flags();
- OldSize = align_size_down(OldSize, _min_alignment);
+ if (!is_size_aligned(OldSize, _gen_alignment)) {
+ FLAG_SET_ERGO(uintx, OldSize, align_size_down(OldSize, _gen_alignment));
+ }
- if (FLAG_IS_CMDLINE(OldSize) && FLAG_IS_DEFAULT(NewSize)) {
+ if (FLAG_IS_CMDLINE(OldSize) && FLAG_IS_DEFAULT(MaxHeapSize)) {
// NewRatio will be used later to set the young generation size so we use
// it to calculate how big the heap should be based on the requested OldSize
// and NewRatio.
assert(NewRatio > 0, "NewRatio should have been set up earlier");
size_t calculated_heapsize = (OldSize / NewRatio) * (NewRatio + 1);
- calculated_heapsize = align_size_up(calculated_heapsize, _max_alignment);
- MaxHeapSize = calculated_heapsize;
- InitialHeapSize = calculated_heapsize;
+ calculated_heapsize = align_size_up(calculated_heapsize, _heap_alignment);
+ FLAG_SET_ERGO(uintx, MaxHeapSize, calculated_heapsize);
+ _max_heap_byte_size = MaxHeapSize;
+ FLAG_SET_ERGO(uintx, InitialHeapSize, calculated_heapsize);
+ _initial_heap_byte_size = InitialHeapSize;
}
- MaxHeapSize = align_size_up(MaxHeapSize, _max_alignment);
// adjust max heap size if necessary
if (NewSize + OldSize > MaxHeapSize) {
- if (FLAG_IS_CMDLINE(MaxHeapSize)) {
+ if (_max_heap_size_cmdline) {
// somebody set a maximum heap size with the intention that we should not
// exceed it. Adjust New/OldSize as necessary.
uintx calculated_size = NewSize + OldSize;
double shrink_factor = (double) MaxHeapSize / calculated_size;
- // align
- NewSize = align_size_down((uintx) (NewSize * shrink_factor), _min_alignment);
+ uintx smaller_new_size = align_size_down((uintx)(NewSize * shrink_factor), _gen_alignment);
+ FLAG_SET_ERGO(uintx, NewSize, MAX2(young_gen_size_lower_bound(), smaller_new_size));
+ _initial_gen0_size = NewSize;
+
// OldSize is already aligned because above we aligned MaxHeapSize to
- // _max_alignment, and we just made sure that NewSize is aligned to
- // _min_alignment. In initialize_flags() we verified that _max_alignment
- // is a multiple of _min_alignment.
- OldSize = MaxHeapSize - NewSize;
+ // _heap_alignment, and we just made sure that NewSize is aligned to
+ // _gen_alignment. In initialize_flags() we verified that _heap_alignment
+ // is a multiple of _gen_alignment.
+ FLAG_SET_ERGO(uintx, OldSize, MaxHeapSize - NewSize);
} else {
- MaxHeapSize = NewSize + OldSize;
+ FLAG_SET_ERGO(uintx, MaxHeapSize, align_size_up(NewSize + OldSize, _heap_alignment));
+ _max_heap_byte_size = MaxHeapSize;
}
}
- // need to do this again
- MaxHeapSize = align_size_up(MaxHeapSize, _max_alignment);
-
- // adjust max heap size if necessary
- if (NewSize + OldSize > MaxHeapSize) {
- if (FLAG_IS_CMDLINE(MaxHeapSize)) {
- // somebody set a maximum heap size with the intention that we should not
- // exceed it. Adjust New/OldSize as necessary.
- uintx calculated_size = NewSize + OldSize;
- double shrink_factor = (double) MaxHeapSize / calculated_size;
- // align
- NewSize = align_size_down((uintx) (NewSize * shrink_factor), _min_alignment);
- // OldSize is already aligned because above we aligned MaxHeapSize to
- // _max_alignment, and we just made sure that NewSize is aligned to
- // _min_alignment. In initialize_flags() we verified that _max_alignment
- // is a multiple of _min_alignment.
- OldSize = MaxHeapSize - NewSize;
- } else {
- MaxHeapSize = NewSize + OldSize;
- }
- }
- // need to do this again
- MaxHeapSize = align_size_up(MaxHeapSize, _max_alignment);
always_do_update_barrier = UseConcMarkSweepGC;
- // Check validity of heap flags
- assert(OldSize % _min_alignment == 0, "old space alignment");
- assert(MaxHeapSize % _max_alignment == 0, "maximum heap alignment");
+ DEBUG_ONLY(TwoGenerationCollectorPolicy::assert_flags();)
}
// Values set on the command line win over any ergonomically
@@ -281,7 +417,7 @@
void GenCollectorPolicy::initialize_size_info() {
CollectorPolicy::initialize_size_info();
- // _min_alignment is used for alignment within a generation.
+ // _space_alignment is used for alignment within a generation.
// There is additional alignment done down stream for some
// collectors that sometimes causes unwanted rounding up of
// generations sizes.
@@ -289,35 +425,8 @@
// Determine maximum size of gen0
size_t max_new_size = 0;
- if (FLAG_IS_CMDLINE(MaxNewSize) || FLAG_IS_ERGO(MaxNewSize)) {
- if (MaxNewSize < _min_alignment) {
- max_new_size = _min_alignment;
- }
- if (MaxNewSize >= _max_heap_byte_size) {
- max_new_size = align_size_down(_max_heap_byte_size - _min_alignment,
- _min_alignment);
- warning("MaxNewSize (" SIZE_FORMAT "k) is equal to or "
- "greater than the entire heap (" SIZE_FORMAT "k). A "
- "new generation size of " SIZE_FORMAT "k will be used.",
- MaxNewSize/K, _max_heap_byte_size/K, max_new_size/K);
- } else {
- max_new_size = align_size_down(MaxNewSize, _min_alignment);
- }
-
- // The case for FLAG_IS_ERGO(MaxNewSize) could be treated
- // specially at this point to just use an ergonomically set
- // MaxNewSize to set max_new_size. For cases with small
- // heaps such a policy often did not work because the MaxNewSize
- // was larger than the entire heap. The interpretation given
- // to ergonomically set flags is that the flags are set
- // by different collectors for their own special needs but
- // are not allowed to badly shape the heap. This allows the
- // different collectors to decide what's best for themselves
- // without having to factor in the overall heap shape. It
- // can be the case in the future that the collectors would
- // only make "wise" ergonomics choices and this policy could
- // just accept those choices. The choices currently made are
- // not always "wise".
+ if (!FLAG_IS_DEFAULT(MaxNewSize)) {
+ max_new_size = MaxNewSize;
} else {
max_new_size = scale_by_NewRatio_aligned(_max_heap_byte_size);
// Bound the maximum size by NewSize below (since it historically
@@ -386,11 +495,22 @@
_min_gen0_size = MIN2(_min_gen0_size, _initial_gen0_size);
}
+ // Write back to flags if necessary
+ if (NewSize != _initial_gen0_size) {
+ FLAG_SET_ERGO(uintx, NewSize, _initial_gen0_size);
+ }
+
+ if (MaxNewSize != _max_gen0_size) {
+ FLAG_SET_ERGO(uintx, MaxNewSize, _max_gen0_size);
+ }
+
if (PrintGCDetails && Verbose) {
gclog_or_tty->print_cr("1: Minimum gen0 " SIZE_FORMAT " Initial gen0 "
SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT,
_min_gen0_size, _initial_gen0_size, _max_gen0_size);
}
+
+ DEBUG_ONLY(GenCollectorPolicy::assert_size_info();)
}
// Call this method during the sizing of the gen1 to make
@@ -403,23 +523,18 @@
// keeping it simple also seems a worthwhile goal.
bool TwoGenerationCollectorPolicy::adjust_gen0_sizes(size_t* gen0_size_ptr,
size_t* gen1_size_ptr,
- const size_t heap_size,
- const size_t min_gen1_size) {
+ const size_t heap_size) {
bool result = false;
- if ((*gen1_size_ptr + *gen0_size_ptr) > heap_size) {
- if ((heap_size < (*gen0_size_ptr + min_gen1_size)) &&
- (heap_size >= min_gen1_size + _min_alignment)) {
- // Adjust gen0 down to accommodate min_gen1_size
- *gen0_size_ptr = heap_size - min_gen1_size;
- *gen0_size_ptr =
- MAX2((uintx)align_size_down(*gen0_size_ptr, _min_alignment), _min_alignment);
- assert(*gen0_size_ptr > 0, "Min gen0 is too large");
+ if ((*gen0_size_ptr + *gen1_size_ptr) > heap_size) {
+ uintx smallest_new_size = young_gen_size_lower_bound();
+ if ((heap_size < (*gen0_size_ptr + _min_gen1_size)) &&
+ (heap_size >= _min_gen1_size + smallest_new_size)) {
+ // Adjust gen0 down to accommodate _min_gen1_size
+ *gen0_size_ptr = align_size_down_bounded(heap_size - _min_gen1_size, _gen_alignment);
result = true;
} else {
- *gen1_size_ptr = heap_size - *gen0_size_ptr;
- *gen1_size_ptr =
- MAX2((uintx)align_size_down(*gen1_size_ptr, _min_alignment), _min_alignment);
+ *gen1_size_ptr = align_size_down_bounded(heap_size - *gen0_size_ptr, _gen_alignment);
}
}
return result;
@@ -440,41 +555,36 @@
// The maximum gen1 size can be determined from the maximum gen0
// and maximum heap size since no explicit flags exits
// for setting the gen1 maximum.
- _max_gen1_size = _max_heap_byte_size - _max_gen0_size;
- _max_gen1_size =
- MAX2((uintx)align_size_down(_max_gen1_size, _min_alignment), _min_alignment);
+ _max_gen1_size = MAX2(_max_heap_byte_size - _max_gen0_size, _gen_alignment);
+
// If no explicit command line flag has been set for the
// gen1 size, use what is left for gen1.
- if (FLAG_IS_DEFAULT(OldSize) || FLAG_IS_ERGO(OldSize)) {
- // The user has not specified any value or ergonomics
- // has chosen a value (which may or may not be consistent
+ if (!FLAG_IS_CMDLINE(OldSize)) {
+ // The user has not specified any value but the ergonomics
+ // may have chosen a value (which may or may not be consistent
// with the overall heap size). In either case make
// the minimum, maximum and initial sizes consistent
// with the gen0 sizes and the overall heap sizes.
- assert(_min_heap_byte_size > _min_gen0_size,
- "gen0 has an unexpected minimum size");
- _min_gen1_size = _min_heap_byte_size - _min_gen0_size;
- _min_gen1_size =
- MAX2((uintx)align_size_down(_min_gen1_size, _min_alignment), _min_alignment);
- _initial_gen1_size = _initial_heap_byte_size - _initial_gen0_size;
- _initial_gen1_size =
- MAX2((uintx)align_size_down(_initial_gen1_size, _min_alignment), _min_alignment);
+ _min_gen1_size = MAX2(_min_heap_byte_size - _min_gen0_size, _gen_alignment);
+ _initial_gen1_size = MAX2(_initial_heap_byte_size - _initial_gen0_size, _gen_alignment);
+ // _max_gen1_size has already been made consistent above
+ FLAG_SET_ERGO(uintx, OldSize, _initial_gen1_size);
} else {
// It's been explicitly set on the command line. Use the
// OldSize and then determine the consequences.
- _min_gen1_size = OldSize;
+ _min_gen1_size = MIN2(OldSize, _min_heap_byte_size - _min_gen0_size);
_initial_gen1_size = OldSize;
// If the user has explicitly set an OldSize that is inconsistent
// with other command line flags, issue a warning.
// The generation minimums and the overall heap mimimum should
- // be within one heap alignment.
- if ((_min_gen1_size + _min_gen0_size + _min_alignment) < _min_heap_byte_size) {
+ // be within one generation alignment.
+ if ((_min_gen1_size + _min_gen0_size + _gen_alignment) < _min_heap_byte_size) {
warning("Inconsistency between minimum heap size and minimum "
"generation sizes: using minimum heap = " SIZE_FORMAT,
_min_heap_byte_size);
}
- if ((OldSize > _max_gen1_size)) {
+ if (OldSize > _max_gen1_size) {
warning("Inconsistency between maximum heap size and maximum "
"generation sizes: using maximum heap = " SIZE_FORMAT
" -XX:OldSize flag is being ignored",
@@ -482,8 +592,7 @@
}
// If there is an inconsistency between the OldSize and the minimum and/or
// initial size of gen0, since OldSize was explicitly set, OldSize wins.
- if (adjust_gen0_sizes(&_min_gen0_size, &_min_gen1_size,
- _min_heap_byte_size, OldSize)) {
+ if (adjust_gen0_sizes(&_min_gen0_size, &_min_gen1_size, _min_heap_byte_size)) {
if (PrintGCDetails && Verbose) {
gclog_or_tty->print_cr("2: Minimum gen0 " SIZE_FORMAT " Initial gen0 "
SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT,
@@ -492,7 +601,7 @@
}
// Initial size
if (adjust_gen0_sizes(&_initial_gen0_size, &_initial_gen1_size,
- _initial_heap_byte_size, OldSize)) {
+ _initial_heap_byte_size)) {
if (PrintGCDetails && Verbose) {
gclog_or_tty->print_cr("3: Minimum gen0 " SIZE_FORMAT " Initial gen0 "
SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT,
@@ -507,11 +616,26 @@
_initial_gen1_size = MAX2(_initial_gen1_size, _min_gen1_size);
_initial_gen1_size = MIN2(_initial_gen1_size, _max_gen1_size);
+ // Write back to flags if necessary
+ if (NewSize != _initial_gen0_size) {
+ FLAG_SET_ERGO(uintx, NewSize, _initial_gen0_size);
+ }
+
+ if (MaxNewSize != _max_gen0_size) {
+ FLAG_SET_ERGO(uintx, MaxNewSize, _max_gen0_size);
+ }
+
+ if (OldSize != _initial_gen1_size) {
+ FLAG_SET_ERGO(uintx, OldSize, _initial_gen1_size);
+ }
+
if (PrintGCDetails && Verbose) {
gclog_or_tty->print_cr("Minimum gen1 " SIZE_FORMAT " Initial gen1 "
SIZE_FORMAT " Maximum gen1 " SIZE_FORMAT,
_min_gen1_size, _initial_gen1_size, _max_gen1_size);
}
+
+ DEBUG_ONLY(TwoGenerationCollectorPolicy::assert_size_info();)
}
HeapWord* GenCollectorPolicy::mem_allocate_work(size_t size,
@@ -605,9 +729,7 @@
gc_count_before = Universe::heap()->total_collections();
}
- VM_GenCollectForAllocation op(size,
- is_tlab,
- gc_count_before);
+ VM_GenCollectForAllocation op(size, is_tlab, gc_count_before);
VMThread::execute(&op);
if (op.prologue_succeeded()) {
result = op.result();
@@ -836,14 +958,16 @@
// MarkSweepPolicy methods
//
-MarkSweepPolicy::MarkSweepPolicy() {
- initialize_all();
+void MarkSweepPolicy::initialize_alignments() {
+ _space_alignment = _gen_alignment = (uintx)Generation::GenGrain;
+ _heap_alignment = compute_heap_alignment();
}
void MarkSweepPolicy::initialize_generations() {
_generations = NEW_C_HEAP_ARRAY3(GenerationSpecPtr, number_of_generations(), mtGC, 0, AllocFailStrategy::RETURN_NULL);
- if (_generations == NULL)
+ if (_generations == NULL) {
vm_exit_during_initialization("Unable to allocate gen spec");
+ }
if (UseParNewGC) {
_generations[0] = new GenerationSpec(Generation::ParNew, _initial_gen0_size, _max_gen0_size);
@@ -852,8 +976,9 @@
}
_generations[1] = new GenerationSpec(Generation::MarkSweepCompact, _initial_gen1_size, _max_gen1_size);
- if (_generations[0] == NULL || _generations[1] == NULL)
+ if (_generations[0] == NULL || _generations[1] == NULL) {
vm_exit_during_initialization("Unable to allocate gen spec");
+ }
}
void MarkSweepPolicy::initialize_gc_policy_counters() {
--- a/hotspot/src/share/vm/memory/collectorPolicy.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/memory/collectorPolicy.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -61,17 +61,23 @@
protected:
GCPolicyCounters* _gc_policy_counters;
- // Requires that the concrete subclass sets the alignment constraints
- // before calling.
+ virtual void initialize_alignments() = 0;
virtual void initialize_flags();
virtual void initialize_size_info();
+ DEBUG_ONLY(virtual void assert_flags();)
+ DEBUG_ONLY(virtual void assert_size_info();)
+
size_t _initial_heap_byte_size;
size_t _max_heap_byte_size;
size_t _min_heap_byte_size;
- size_t _min_alignment;
- size_t _max_alignment;
+ size_t _space_alignment;
+ size_t _heap_alignment;
+
+ // Needed to keep information if MaxHeapSize was set on the command line
+ // when the flag value is aligned etc by ergonomics
+ bool _max_heap_size_cmdline;
// The sizing of the heap are controlled by a sizing policy.
AdaptiveSizePolicy* _size_policy;
@@ -79,6 +85,7 @@
// Set to true when policy wants soft refs cleared.
// Reset to false by gc after it clears all soft refs.
bool _should_clear_all_soft_refs;
+
// Set to true by the GC if the just-completed gc cleared all
// softrefs. This is set to true whenever a gc clears all softrefs, and
// set to false each time gc returns to the mutator. For example, in the
@@ -86,23 +93,20 @@
// mem_allocate() where it returns op.result()
bool _all_soft_refs_clear;
- CollectorPolicy() :
- _min_alignment(1),
- _max_alignment(1),
- _initial_heap_byte_size(0),
- _max_heap_byte_size(0),
- _min_heap_byte_size(0),
- _size_policy(NULL),
- _should_clear_all_soft_refs(false),
- _all_soft_refs_clear(false)
- {}
+ CollectorPolicy();
public:
- // Return maximum heap alignment that may be imposed by the policy
- static size_t compute_max_alignment();
+ virtual void initialize_all() {
+ initialize_alignments();
+ initialize_flags();
+ initialize_size_info();
+ }
- size_t min_alignment() { return _min_alignment; }
- size_t max_alignment() { return _max_alignment; }
+ // Return maximum heap alignment that may be imposed by the policy
+ static size_t compute_heap_alignment();
+
+ size_t space_alignment() { return _space_alignment; }
+ size_t heap_alignment() { return _heap_alignment; }
size_t initial_heap_byte_size() { return _initial_heap_byte_size; }
size_t max_heap_byte_size() { return _max_heap_byte_size; }
@@ -151,7 +155,6 @@
virtual BarrierSet::Name barrier_set_name() = 0;
- virtual GenRemSet::Name rem_set_name() = 0;
// Create the remembered set (to cover the given reserved region,
// allowing breaking up into at most "max_covered_regions").
@@ -195,6 +198,9 @@
return false;
}
+ // Do any updates required to global flags that are due to heap initialization
+ // changes
+ virtual void post_heap_initialize() = 0;
};
class ClearedAllSoftRefs : public StackObj {
@@ -219,6 +225,10 @@
size_t _initial_gen0_size;
size_t _max_gen0_size;
+ // _gen_alignment and _space_alignment will have the same value most of the
+ // time. When using large pages they can differ.
+ size_t _gen_alignment;
+
GenerationSpec **_generations;
// Return true if an allocation should be attempted in the older
@@ -229,41 +239,50 @@
void initialize_flags();
void initialize_size_info();
+ DEBUG_ONLY(void assert_flags();)
+ DEBUG_ONLY(void assert_size_info();)
+
// Try to allocate space by expanding the heap.
virtual HeapWord* expand_heap_and_allocate(size_t size, bool is_tlab);
- // Scale the base_size by NewRation according to
+ // Compute max heap alignment
+ size_t compute_max_alignment();
+
+ // Scale the base_size by NewRatio according to
// result = base_size / (NewRatio + 1)
// and align by min_alignment()
size_t scale_by_NewRatio_aligned(size_t base_size);
- // Bound the value by the given maximum minus the
- // min_alignment.
+ // Bound the value by the given maximum minus the min_alignment
size_t bound_minus_alignment(size_t desired_size, size_t maximum_size);
public:
+ GenCollectorPolicy();
+
// Accessors
size_t min_gen0_size() { return _min_gen0_size; }
size_t initial_gen0_size() { return _initial_gen0_size; }
size_t max_gen0_size() { return _max_gen0_size; }
+ size_t gen_alignment() { return _gen_alignment; }
virtual int number_of_generations() = 0;
- virtual GenerationSpec **generations() {
+ virtual GenerationSpec **generations() {
assert(_generations != NULL, "Sanity check");
return _generations;
}
virtual GenCollectorPolicy* as_generation_policy() { return this; }
- virtual void initialize_generations() = 0;
+ virtual void initialize_generations() { };
virtual void initialize_all() {
- initialize_flags();
- initialize_size_info();
+ CollectorPolicy::initialize_all();
initialize_generations();
}
+ size_t young_gen_size_lower_bound();
+
HeapWord* mem_allocate_work(size_t size,
bool is_tlab,
bool* gc_overhead_limit_was_exceeded);
@@ -274,6 +293,10 @@
virtual void initialize_size_policy(size_t init_eden_size,
size_t init_promo_size,
size_t init_survivor_size);
+
+ virtual void post_heap_initialize() {
+ assert(_max_gen0_size == MaxNewSize, "Should be taken care of by initialize_size_info");
+ }
};
// All of hotspot's current collectors are subtypes of this
@@ -290,9 +313,14 @@
void initialize_flags();
void initialize_size_info();
- void initialize_generations() { ShouldNotReachHere(); }
+
+ DEBUG_ONLY(void assert_flags();)
+ DEBUG_ONLY(void assert_size_info();)
public:
+ TwoGenerationCollectorPolicy() : GenCollectorPolicy(), _min_gen1_size(0),
+ _initial_gen1_size(0), _max_gen1_size(0) {}
+
// Accessors
size_t min_gen1_size() { return _min_gen1_size; }
size_t initial_gen1_size() { return _initial_gen1_size; }
@@ -301,25 +329,25 @@
// Inherited methods
TwoGenerationCollectorPolicy* as_two_generation_policy() { return this; }
- int number_of_generations() { return 2; }
- BarrierSet::Name barrier_set_name() { return BarrierSet::CardTableModRef; }
- GenRemSet::Name rem_set_name() { return GenRemSet::CardTable; }
+ int number_of_generations() { return 2; }
+ BarrierSet::Name barrier_set_name() { return BarrierSet::CardTableModRef; }
virtual CollectorPolicy::Name kind() {
return CollectorPolicy::TwoGenerationCollectorPolicyKind;
}
- // Returns true is gen0 sizes were adjusted
+ // Returns true if gen0 sizes were adjusted
bool adjust_gen0_sizes(size_t* gen0_size_ptr, size_t* gen1_size_ptr,
- const size_t heap_size, const size_t min_gen1_size);
+ const size_t heap_size);
};
class MarkSweepPolicy : public TwoGenerationCollectorPolicy {
protected:
+ void initialize_alignments();
void initialize_generations();
public:
- MarkSweepPolicy();
+ MarkSweepPolicy() {}
MarkSweepPolicy* as_mark_sweep_policy() { return this; }
--- a/hotspot/src/share/vm/memory/defNewGeneration.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/memory/defNewGeneration.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -204,7 +204,7 @@
// Compute the maximum eden and survivor space sizes. These sizes
// are computed assuming the entire reserved space is committed.
// These values are exported as performance counters.
- uintx alignment = GenCollectedHeap::heap()->collector_policy()->min_alignment();
+ uintx alignment = GenCollectedHeap::heap()->collector_policy()->space_alignment();
uintx size = _virtual_space.reserved_size();
_max_survivor_size = compute_survivor_size(size, alignment);
_max_eden_size = size - (2*_max_survivor_size);
@@ -235,7 +235,7 @@
bool clear_space,
bool mangle_space) {
uintx alignment =
- GenCollectedHeap::heap()->collector_policy()->min_alignment();
+ GenCollectedHeap::heap()->collector_policy()->space_alignment();
// If the spaces are being cleared (only done at heap initialization
// currently), the survivor spaces need not be empty.
@@ -473,7 +473,7 @@
}
size_t DefNewGeneration::max_capacity() const {
- const size_t alignment = GenCollectedHeap::heap()->collector_policy()->min_alignment();
+ const size_t alignment = GenCollectedHeap::heap()->collector_policy()->space_alignment();
const size_t reserved_bytes = reserved().byte_size();
return reserved_bytes - compute_survivor_size(reserved_bytes, alignment);
}
--- a/hotspot/src/share/vm/memory/genCollectedHeap.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/memory/genCollectedHeap.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -111,7 +111,7 @@
int n_covered_regions = 0;
ReservedSpace heap_rs;
- size_t heap_alignment = collector_policy()->max_alignment();
+ size_t heap_alignment = collector_policy()->heap_alignment();
heap_address = allocate(heap_alignment, &total_reserved,
&n_covered_regions, &heap_rs);
@@ -1053,12 +1053,6 @@
}
}
-void GenCollectedHeap::compute_new_generation_sizes(int collectedGen) {
- for (int i = 0; i <= collectedGen; i++) {
- _gens[i]->compute_new_size();
- }
-}
-
GenCollectedHeap* GenCollectedHeap::heap() {
assert(_gch != NULL, "Uninitialized access to GenCollectedHeap::heap()");
assert(_gch->kind() == CollectedHeap::GenCollectedHeap, "not a generational heap");
--- a/hotspot/src/share/vm/memory/genCollectedHeap.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/memory/genCollectedHeap.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -86,10 +86,6 @@
NOT_PRODUCT(static size_t _skip_header_HeapWords;)
protected:
- // Directs each generation up to and including "collectedGen" to recompute
- // its desired size.
- void compute_new_generation_sizes(int collectedGen);
-
// Helper functions for allocation
HeapWord* attempt_allocation(size_t size,
bool is_tlab,
--- a/hotspot/src/share/vm/memory/metaspace.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/memory/metaspace.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -2975,11 +2975,6 @@
#endif
-// Align down. If the aligning result in 0, return 'alignment'.
-static size_t restricted_align_down(size_t size, size_t alignment) {
- return MAX2(alignment, align_size_down_(size, alignment));
-}
-
void Metaspace::ergo_initialize() {
if (DumpSharedSpaces) {
// Using large pages when dumping the shared archive is currently not implemented.
@@ -3002,13 +2997,13 @@
// Ideally, we would be able to set the default value of MaxMetaspaceSize in
// globals.hpp to the aligned value, but this is not possible, since the
// alignment depends on other flags being parsed.
- MaxMetaspaceSize = restricted_align_down(MaxMetaspaceSize, _reserve_alignment);
+ MaxMetaspaceSize = align_size_down_bounded(MaxMetaspaceSize, _reserve_alignment);
if (MetaspaceSize > MaxMetaspaceSize) {
MetaspaceSize = MaxMetaspaceSize;
}
- MetaspaceSize = restricted_align_down(MetaspaceSize, _commit_alignment);
+ MetaspaceSize = align_size_down_bounded(MetaspaceSize, _commit_alignment);
assert(MetaspaceSize <= MaxMetaspaceSize, "MetaspaceSize should be limited by MaxMetaspaceSize");
@@ -3016,10 +3011,10 @@
vm_exit_during_initialization("Too small initial Metaspace size");
}
- MinMetaspaceExpansion = restricted_align_down(MinMetaspaceExpansion, _commit_alignment);
- MaxMetaspaceExpansion = restricted_align_down(MaxMetaspaceExpansion, _commit_alignment);
-
- CompressedClassSpaceSize = restricted_align_down(CompressedClassSpaceSize, _reserve_alignment);
+ MinMetaspaceExpansion = align_size_down_bounded(MinMetaspaceExpansion, _commit_alignment);
+ MaxMetaspaceExpansion = align_size_down_bounded(MaxMetaspaceExpansion, _commit_alignment);
+
+ CompressedClassSpaceSize = align_size_down_bounded(CompressedClassSpaceSize, _reserve_alignment);
set_compressed_class_space_size(CompressedClassSpaceSize);
}
--- a/hotspot/src/share/vm/memory/sharedHeap.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/memory/sharedHeap.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -247,6 +247,7 @@
}
void SharedHeap::post_initialize() {
+ CollectedHeap::post_initialize();
ref_processing_init();
}
--- a/hotspot/src/share/vm/memory/universe.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/memory/universe.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -785,6 +785,7 @@
} else if (UseG1GC) {
#if INCLUDE_ALL_GCS
G1CollectorPolicy* g1p = new G1CollectorPolicy();
+ g1p->initialize_all();
G1CollectedHeap* g1h = new G1CollectedHeap(g1p);
Universe::_collectedHeap = g1h;
#else // INCLUDE_ALL_GCS
@@ -809,6 +810,7 @@
} else { // default old generation
gc_policy = new MarkSweepPolicy();
}
+ gc_policy->initialize_all();
Universe::_collectedHeap = new GenCollectedHeap(gc_policy);
}
@@ -1041,7 +1043,7 @@
Universe::_virtual_machine_error_instance =
InstanceKlass::cast(k)->allocate_instance(CHECK_false);
- Universe::_vm_exception = InstanceKlass::cast(k)->allocate_instance(CHECK_false);
+ Universe::_vm_exception = InstanceKlass::cast(k)->allocate_instance(CHECK_false);
if (!DumpSharedSpaces) {
// These are the only Java fields that are currently set during shared space dumping.
--- a/hotspot/src/share/vm/oops/cpCache.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/oops/cpCache.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -554,24 +554,37 @@
// Implementation of ConstantPoolCache
ConstantPoolCache* ConstantPoolCache::allocate(ClassLoaderData* loader_data,
- int length,
const intStack& index_map,
+ const intStack& invokedynamic_index_map,
const intStack& invokedynamic_map, TRAPS) {
+
+ const int length = index_map.length() + invokedynamic_index_map.length();
int size = ConstantPoolCache::size(length);
return new (loader_data, size, false, MetaspaceObj::ConstantPoolCacheType, THREAD)
- ConstantPoolCache(length, index_map, invokedynamic_map);
+ ConstantPoolCache(length, index_map, invokedynamic_index_map, invokedynamic_map);
}
void ConstantPoolCache::initialize(const intArray& inverse_index_map,
+ const intArray& invokedynamic_inverse_index_map,
const intArray& invokedynamic_references_map) {
- assert(inverse_index_map.length() == length(), "inverse index map must have same length as cache");
- for (int i = 0; i < length(); i++) {
+ for (int i = 0; i < inverse_index_map.length(); i++) {
ConstantPoolCacheEntry* e = entry_at(i);
int original_index = inverse_index_map[i];
e->initialize_entry(original_index);
assert(entry_at(i) == e, "sanity");
}
+
+ // Append invokedynamic entries at the end
+ int invokedynamic_offset = inverse_index_map.length();
+ for (int i = 0; i < invokedynamic_inverse_index_map.length(); i++) {
+ int offset = i + invokedynamic_offset;
+ ConstantPoolCacheEntry* e = entry_at(offset);
+ int original_index = invokedynamic_inverse_index_map[i];
+ e->initialize_entry(original_index);
+ assert(entry_at(offset) == e, "sanity");
+ }
+
for (int ref = 0; ref < invokedynamic_references_map.length(); ref++) {
const int cpci = invokedynamic_references_map[ref];
if (cpci >= 0) {
--- a/hotspot/src/share/vm/oops/cpCache.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/oops/cpCache.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -31,6 +31,10 @@
class PSPromotionManager;
+// The ConstantPoolCache is not a cache! It is the resolution table that the
+// interpreter uses to avoid going into the runtime and a way to access resolved
+// values.
+
// A ConstantPoolCacheEntry describes an individual entry of the constant
// pool cache. There's 2 principal kinds of entries: field entries for in-
// stance & static field access, and method entries for invokes. Some of
@@ -392,26 +396,33 @@
friend class MetadataFactory;
private:
int _length;
- ConstantPool* _constant_pool; // the corresponding constant pool
+ ConstantPool* _constant_pool; // the corresponding constant pool
// Sizing
debug_only(friend class ClassVerifier;)
// Constructor
- ConstantPoolCache(int length, const intStack& inverse_index_map,
+ ConstantPoolCache(int length,
+ const intStack& inverse_index_map,
+ const intStack& invokedynamic_inverse_index_map,
const intStack& invokedynamic_references_map) :
- _length(length), _constant_pool(NULL) {
- initialize(inverse_index_map, invokedynamic_references_map);
+ _length(length),
+ _constant_pool(NULL) {
+ initialize(inverse_index_map, invokedynamic_inverse_index_map,
+ invokedynamic_references_map);
for (int i = 0; i < length; i++) {
assert(entry_at(i)->is_f1_null(), "Failed to clear?");
}
}
// Initialization
- void initialize(const intArray& inverse_index_map, const intArray& invokedynamic_references_map);
+ void initialize(const intArray& inverse_index_map,
+ const intArray& invokedynamic_inverse_index_map,
+ const intArray& invokedynamic_references_map);
public:
- static ConstantPoolCache* allocate(ClassLoaderData* loader_data, int length,
- const intStack& inverse_index_map,
+ static ConstantPoolCache* allocate(ClassLoaderData* loader_data,
+ const intStack& cp_cache_map,
+ const intStack& invokedynamic_cp_cache_map,
const intStack& invokedynamic_references_map, TRAPS);
bool is_constantPoolCache() const { return true; }
--- a/hotspot/src/share/vm/oops/instanceKlass.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/oops/instanceKlass.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -2211,6 +2211,10 @@
data = mdo->next_data(data)) {
data->clean_weak_klass_links(is_alive);
}
+ ParametersTypeData* parameters = mdo->parameters_type_data();
+ if (parameters != NULL) {
+ parameters->clean_weak_klass_links(is_alive);
+ }
}
}
}
--- a/hotspot/src/share/vm/oops/klassVtable.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/oops/klassVtable.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -86,7 +86,11 @@
get_mirandas(&new_mirandas, all_mirandas, super, methods, NULL, local_interfaces);
*num_new_mirandas = new_mirandas.length();
- vtable_length += *num_new_mirandas * vtableEntry::size();
+ // Interfaces do not need interface methods in their vtables
+ // This includes miranda methods and during later processing, default methods
+ if (!class_flags.is_interface()) {
+ vtable_length += *num_new_mirandas * vtableEntry::size();
+ }
if (Universe::is_bootstrapping() && vtable_length == 0) {
// array classes don't have their superclass set correctly during
@@ -224,7 +228,11 @@
}
// add miranda methods; it will also return the updated initialized
- initialized = fill_in_mirandas(initialized);
+ // Interfaces do not need interface methods in their vtables
+ // This includes miranda methods and during later processing, default methods
+ if (!ik()->is_interface()) {
+ initialized = fill_in_mirandas(initialized);
+ }
// In class hierarchies where the accessibility is not increasing (i.e., going from private ->
// package_private -> public/protected), the vtable might actually be smaller than our initial
@@ -264,12 +272,12 @@
_klass->internal_name(), sig, vtable_index);
super_method->access_flags().print_on(tty);
if (super_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
tty->print("overriders flags: ");
target_method->access_flags().print_on(tty);
if (target_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
}
#endif /*PRODUCT*/
@@ -332,9 +340,15 @@
// An interface never allocates new vtable slots, only inherits old ones.
// This method will either be assigned its own itable index later,
// or be assigned an inherited vtable index in the loop below.
- // default methods store their vtable indices in the inheritors default_vtable_indices
- assert (default_index == -1, "interfaces don't store resolved default methods");
- target_method()->set_vtable_index(Method::pending_itable_index);
+ // default methods inherited by classes store their vtable indices
+ // in the inheritor's default_vtable_indices
+ // default methods inherited by interfaces may already have a
+ // valid itable index, if so, don't change it
+ // overpass methods in an interface will be assigned an itable index later
+ // by an inheriting class
+ if (!is_default || !target_method()->has_itable_index()) {
+ target_method()->set_vtable_index(Method::pending_itable_index);
+ }
}
// we need a new entry if there is no superclass
@@ -441,7 +455,7 @@
target_klass->internal_name(), sig, i);
super_method->access_flags().print_on(tty);
if (super_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
if (super_method->is_overpass()) {
tty->print("overpass");
@@ -449,7 +463,7 @@
tty->print("overriders flags: ");
target_method->access_flags().print_on(tty);
if (target_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
if (target_method->is_overpass()) {
tty->print("overpass");
@@ -468,7 +482,7 @@
target_klass->internal_name(), sig,i);
super_method->access_flags().print_on(tty);
if (super_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
if (super_method->is_overpass()) {
tty->print("overpass");
@@ -476,7 +490,7 @@
tty->print("overriders flags: ");
target_method->access_flags().print_on(tty);
if (target_method->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
if (target_method->is_overpass()) {
tty->print("overpass");
@@ -494,8 +508,18 @@
#ifndef PRODUCT
if (PrintVtables && Verbose) {
ResourceMark rm;
- tty->print_cr("adding %s::%s at index %d", _klass->internal_name(),
- (m != NULL) ? m->name()->as_C_string() : "<NULL>", index);
+ const char* sig = (m != NULL) ? m->name_and_sig_as_C_string() : "<NULL>";
+ tty->print("adding %s at index %d, flags: ", sig, index);
+ if (m != NULL) {
+ m->access_flags().print_on(tty);
+ if (m->is_default_method()) {
+ tty->print("default ");
+ }
+ if (m->is_overpass()) {
+ tty->print("overpass");
+ }
+ }
+ tty->cr();
}
#endif
table()[index].set(m);
@@ -631,8 +655,10 @@
if (mhk->is_interface()) {
assert(m->is_public(), "should be public");
assert(ik()->implements_interface(method_holder) , "this class should implement the interface");
- assert(is_miranda(m, ik()->methods(), ik()->default_methods(), ik()->super()), "should be a miranda_method");
- return true;
+ // the search could find a miranda or a default method
+ if (is_miranda(m, ik()->methods(), ik()->default_methods(), ik()->super())) {
+ return true;
+ }
}
return false;
}
@@ -644,9 +670,10 @@
// the caller must make sure that the method belongs to an interface implemented by the class
// Miranda methods only include public interface instance methods
// Not private methods, not static methods, not default == concrete abstract
+// Miranda methods also do not include overpass methods in interfaces
bool klassVtable::is_miranda(Method* m, Array<Method*>* class_methods,
Array<Method*>* default_methods, Klass* super) {
- if (m->is_static() || m->is_private()) {
+ if (m->is_static() || m->is_private() || m->is_overpass()) {
return false;
}
Symbol* name = m->name();
@@ -744,6 +771,8 @@
// Discover miranda methods ("miranda" = "interface abstract, no binding"),
// and append them into the vtable starting at index initialized,
// return the new value of initialized.
+// Miranda methods use vtable entries, but do not get assigned a vtable_index
+// The vtable_index is discovered by searching from the end of the vtable
int klassVtable::fill_in_mirandas(int initialized) {
GrowableArray<Method*> mirandas(20);
get_mirandas(&mirandas, NULL, ik()->super(), ik()->methods(),
@@ -758,7 +787,7 @@
sig, initialized);
meth->access_flags().print_on(tty);
if (meth->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
tty->cr();
}
@@ -858,7 +887,7 @@
tty->print(" (%5d) ", i);
m->access_flags().print_on(tty);
if (m->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
if (m->is_overpass()) {
tty->print("overpass");
@@ -977,6 +1006,25 @@
if (interface_method_needs_itable_index(m)) {
assert(!m->is_final_method(), "no final interface methods");
// If m is already assigned a vtable index, do not disturb it.
+ if (TraceItables && Verbose) {
+ ResourceMark rm;
+ const char* sig = (m != NULL) ? m->name_and_sig_as_C_string() : "<NULL>";
+ if (m->has_vtable_index()) {
+ tty->print("itable index %d for method: %s, flags: ", m->vtable_index(), sig);
+ } else {
+ tty->print("itable index %d for method: %s, flags: ", ime_num, sig);
+ }
+ if (m != NULL) {
+ m->access_flags().print_on(tty);
+ if (m->is_default_method()) {
+ tty->print("default ");
+ }
+ if (m->is_overpass()) {
+ tty->print("overpass");
+ }
+ }
+ tty->cr();
+ }
if (!m->has_vtable_index()) {
assert(m->vtable_index() == Method::pending_itable_index, "set by initialize_vtable");
m->set_itable_index(ime_num);
@@ -1079,7 +1127,7 @@
tty->print("target_method flags: ");
target()->access_flags().print_on(tty);
if (target()->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
tty->cr();
}
@@ -1158,7 +1206,7 @@
tty->print(" (%5d) ", i);
m->access_flags().print_on(tty);
if (m->is_default_method()) {
- tty->print("default");
+ tty->print("default ");
}
tty->print(" -- ");
m->print_name(tty);
--- a/hotspot/src/share/vm/oops/methodData.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/oops/methodData.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -275,23 +275,23 @@
}
bool TypeEntries::is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p) {
- return !is_type_none(p) &&
- !((Klass*)klass_part(p))->is_loader_alive(is_alive_cl);
+ Klass* k = (Klass*)klass_part(p);
+ return k != NULL && k->is_loader_alive(is_alive_cl);
}
void TypeStackSlotEntries::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) {
for (int i = 0; i < _number_of_entries; i++) {
intptr_t p = type(i);
- if (is_loader_alive(is_alive_cl, p)) {
- set_type(i, type_none());
+ if (!is_loader_alive(is_alive_cl, p)) {
+ set_type(i, with_status((Klass*)NULL, p));
}
}
}
void ReturnTypeEntry::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) {
intptr_t p = type();
- if (is_loader_alive(is_alive_cl, p)) {
- set_type(type_none());
+ if (!is_loader_alive(is_alive_cl, p)) {
+ set_type(with_status((Klass*)NULL, p));
}
}
--- a/hotspot/src/share/vm/oops/methodData.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/oops/methodData.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -690,7 +690,6 @@
// recorded type: cell without bit 0 and 1
static intptr_t klass_part(intptr_t v) {
intptr_t r = v & type_klass_mask;
- assert (r != 0, "invalid");
return r;
}
@@ -698,7 +697,9 @@
static Klass* valid_klass(intptr_t k) {
if (!is_type_none(k) &&
!is_type_unknown(k)) {
- return (Klass*)klass_part(k);
+ Klass* res = (Klass*)klass_part(k);
+ assert(res != NULL, "invalid");
+ return res;
} else {
return NULL;
}
--- a/hotspot/src/share/vm/opto/bytecodeInfo.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/opto/bytecodeInfo.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -389,6 +389,10 @@
return false;
}
if (inline_level() > _max_inline_level) {
+ if (callee_method->force_inline() && inline_level() > MaxForceInlineLevel) {
+ set_msg("MaxForceInlineLevel");
+ return false;
+ }
if (!callee_method->force_inline() || !IncrementalInline) {
set_msg("inlining too deep");
return false;
--- a/hotspot/src/share/vm/opto/callGenerator.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/opto/callGenerator.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -776,7 +776,7 @@
guarantee(!target->is_method_handle_intrinsic(), "should not happen"); // XXX remove
const int vtable_index = Method::invalid_vtable_index;
CallGenerator* cg = C->call_generator(target, vtable_index, false, jvms, true, PROB_ALWAYS, NULL, true, true);
- assert(!cg->is_late_inline() || cg->is_mh_late_inline(), "no late inline here");
+ assert(cg == NULL || !cg->is_late_inline() || cg->is_mh_late_inline(), "no late inline here");
if (cg != NULL && cg->is_inline())
return cg;
}
@@ -846,7 +846,7 @@
}
CallGenerator* cg = C->call_generator(target, vtable_index, call_does_dispatch, jvms, true, PROB_ALWAYS, speculative_receiver_type, true, true);
- assert(!cg->is_late_inline() || cg->is_mh_late_inline(), "no late inline here");
+ assert(cg == NULL || !cg->is_late_inline() || cg->is_mh_late_inline(), "no late inline here");
if (cg != NULL && cg->is_inline())
return cg;
}
--- a/hotspot/src/share/vm/opto/loopopts.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/opto/loopopts.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -42,6 +42,13 @@
// so disable this for now
return NULL;
}
+
+ if (n->is_MathExact()) {
+ // MathExact has projections that are not correctly handled in the code
+ // below.
+ return NULL;
+ }
+
int wins = 0;
assert(!n->is_CFG(), "");
assert(region->is_Region(), "");
--- a/hotspot/src/share/vm/opto/matcher.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/opto/matcher.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -464,17 +464,17 @@
C->FIRST_STACK_mask().Clear();
// Add in the incoming argument area
- OptoReg::Name init = OptoReg::add(_old_SP, C->out_preserve_stack_slots());
- for (i = init; i < _in_arg_limit; i = OptoReg::add(i,1))
+ OptoReg::Name init_in = OptoReg::add(_old_SP, C->out_preserve_stack_slots());
+ for (i = init_in; i < _in_arg_limit; i = OptoReg::add(i,1)) {
C->FIRST_STACK_mask().Insert(i);
-
+ }
// Add in all bits past the outgoing argument area
guarantee(RegMask::can_represent_arg(OptoReg::add(_out_arg_limit,-1)),
"must be able to represent all call arguments in reg mask");
- init = _out_arg_limit;
- for (i = init; RegMask::can_represent(i); i = OptoReg::add(i,1))
+ OptoReg::Name init = _out_arg_limit;
+ for (i = init; RegMask::can_represent(i); i = OptoReg::add(i,1)) {
C->FIRST_STACK_mask().Insert(i);
-
+ }
// Finally, set the "infinite stack" bit.
C->FIRST_STACK_mask().set_AllStack();
@@ -506,16 +506,36 @@
idealreg2spillmask[Op_VecS]->OR(C->FIRST_STACK_mask());
}
if (Matcher::vector_size_supported(T_FLOAT,2)) {
+ // For VecD we need dual alignment and 8 bytes (2 slots) for spills.
+ // RA guarantees such alignment since it is needed for Double and Long values.
*idealreg2spillmask[Op_VecD] = *idealreg2regmask[Op_VecD];
idealreg2spillmask[Op_VecD]->OR(aligned_stack_mask);
}
if (Matcher::vector_size_supported(T_FLOAT,4)) {
+ // For VecX we need quadro alignment and 16 bytes (4 slots) for spills.
+ //
+ // RA can use input arguments stack slots for spills but until RA
+ // we don't know frame size and offset of input arg stack slots.
+ //
+ // Exclude last input arg stack slots to avoid spilling vectors there
+ // otherwise vector spills could stomp over stack slots in caller frame.
+ OptoReg::Name in = OptoReg::add(_in_arg_limit, -1);
+ for (int k = 1; (in >= init_in) && (k < RegMask::SlotsPerVecX); k++) {
+ aligned_stack_mask.Remove(in);
+ in = OptoReg::add(in, -1);
+ }
aligned_stack_mask.clear_to_sets(RegMask::SlotsPerVecX);
assert(aligned_stack_mask.is_AllStack(), "should be infinite stack");
*idealreg2spillmask[Op_VecX] = *idealreg2regmask[Op_VecX];
idealreg2spillmask[Op_VecX]->OR(aligned_stack_mask);
}
if (Matcher::vector_size_supported(T_FLOAT,8)) {
+ // For VecY we need octo alignment and 32 bytes (8 slots) for spills.
+ OptoReg::Name in = OptoReg::add(_in_arg_limit, -1);
+ for (int k = 1; (in >= init_in) && (k < RegMask::SlotsPerVecY); k++) {
+ aligned_stack_mask.Remove(in);
+ in = OptoReg::add(in, -1);
+ }
aligned_stack_mask.clear_to_sets(RegMask::SlotsPerVecY);
assert(aligned_stack_mask.is_AllStack(), "should be infinite stack");
*idealreg2spillmask[Op_VecY] = *idealreg2regmask[Op_VecY];
--- a/hotspot/src/share/vm/opto/mathexactnode.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/opto/mathexactnode.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -49,7 +49,7 @@
virtual Node* Identity(PhaseTransform* phase) { return this; }
virtual Node* Ideal(PhaseGVN* phase, bool can_reshape) { return NULL; }
virtual const Type* Value(PhaseTransform* phase) const { return bottom_type(); }
- virtual uint hash() const { return Node::hash(); }
+ virtual uint hash() const { return NO_HASH; }
virtual bool is_CFG() const { return false; }
virtual uint ideal_reg() const { return NotAMachineReg; }
--- a/hotspot/src/share/vm/prims/whitebox.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/prims/whitebox.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -53,6 +53,8 @@
#include "compiler/compileBroker.hpp"
#include "runtime/compilationPolicy.hpp"
+#define SIZE_T_MAX_VALUE ((size_t) -1)
+
bool WhiteBox::_used = false;
WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
@@ -105,10 +107,116 @@
gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Min alignment "SIZE_FORMAT" Max alignment "SIZE_FORMAT,
p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
- p->min_alignment(), p->max_alignment());
+ p->space_alignment(), p->heap_alignment());
}
WB_END
+#ifndef PRODUCT
+// Forward declaration
+void TestReservedSpace_test();
+void TestReserveMemorySpecial_test();
+void TestVirtualSpace_test();
+void TestMetaspaceAux_test();
+#endif
+
+WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
+#ifndef PRODUCT
+ TestReservedSpace_test();
+ TestReserveMemorySpecial_test();
+ TestVirtualSpace_test();
+ TestMetaspaceAux_test();
+#endif
+WB_END
+
+WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
+ size_t granularity = os::vm_allocation_granularity();
+ ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
+ VirtualSpace vs;
+ vs.initialize(rhs, 50 * granularity);
+
+ //Check if constraints are complied
+ if (!( UseCompressedOops && rhs.base() != NULL &&
+ Universe::narrow_oop_base() != NULL &&
+ Universe::narrow_oop_use_implicit_null_checks() )) {
+ tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
+ "\tUseCompressedOops is %d\n"
+ "\trhs.base() is "PTR_FORMAT"\n"
+ "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
+ "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
+ UseCompressedOops,
+ rhs.base(),
+ Universe::narrow_oop_base(),
+ Universe::narrow_oop_use_implicit_null_checks());
+ return;
+ }
+ tty->print_cr("Reading from no access area... ");
+ tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
+ *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
+WB_END
+
+static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
+ size_t magnitude, size_t iterations) {
+ size_t granularity = os::vm_allocation_granularity();
+ ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
+ VirtualSpace vs;
+ if (!vs.initialize(rhs, 0)) {
+ tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
+ return 3;
+ }
+
+ long seed = os::random();
+ tty->print_cr("Random seed is %ld", seed);
+ os::init_random(seed);
+
+ for (size_t i = 0; i < iterations; i++) {
+
+ // Whether we will shrink or grow
+ bool shrink = os::random() % 2L == 0;
+
+ // Get random delta to resize virtual space
+ size_t delta = (size_t)os::random() % magnitude;
+
+ // If we are about to shrink virtual space below zero, then expand instead
+ if (shrink && vs.committed_size() < delta) {
+ shrink = false;
+ }
+
+ // Resizing by delta
+ if (shrink) {
+ vs.shrink_by(delta);
+ } else {
+ // If expanding fails expand_by will silently return false
+ vs.expand_by(delta, true);
+ }
+ }
+ return 0;
+}
+
+WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
+ jlong reserved_space_size, jlong magnitude, jlong iterations))
+ tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
+ "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
+ iterations);
+ if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
+ tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
+ return 1;
+ }
+
+ // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
+ // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
+ if (sizeof(size_t) < sizeof(jlong)) {
+ jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
+ if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
+ || iterations > size_t_max_value) {
+ tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
+ return 2;
+ }
+ }
+
+ return wb_stress_virtual_space_resize((size_t) reserved_space_size,
+ (size_t) magnitude, (size_t) iterations);
+WB_END
+
#if INCLUDE_ALL_GCS
WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
G1CollectedHeap* g1 = G1CollectedHeap::heap();
@@ -445,6 +553,9 @@
{CC"getCompressedOopsMaxHeapSize", CC"()J",
(void*)&WB_GetCompressedOopsMaxHeapSize},
{CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
+ {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
+ {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
+ {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
#if INCLUDE_ALL_GCS
{CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
{CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
--- a/hotspot/src/share/vm/runtime/arguments.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/runtime/arguments.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -1132,9 +1132,6 @@
Tier3InvokeNotifyFreqLog = 0;
Tier4InvocationThreshold = 0;
}
- if (FLAG_IS_DEFAULT(NmethodSweepFraction)) {
- FLAG_SET_DEFAULT(NmethodSweepFraction, 1 + ReservedCodeCacheSize / (16 * M));
- }
}
#if INCLUDE_ALL_GCS
@@ -1408,7 +1405,7 @@
// NULL page is located before the heap, we pad the NULL page to the conservative
// maximum alignment that the GC may ever impose upon the heap.
size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(),
- Arguments::conservative_max_heap_alignment());
+ _conservative_max_heap_alignment);
LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
NOT_LP64(ShouldNotReachHere(); return 0);
@@ -1505,7 +1502,7 @@
}
#endif // INCLUDE_ALL_GCS
_conservative_max_heap_alignment = MAX3(heap_alignment, os::max_page_size(),
- CollectorPolicy::compute_max_alignment());
+ CollectorPolicy::compute_heap_alignment());
}
void Arguments::set_ergonomics_flags() {
@@ -2165,6 +2162,10 @@
#if INCLUDE_ALL_GCS
if (UseG1GC) {
+ status = status && verify_percentage(G1NewSizePercent, "G1NewSizePercent");
+ status = status && verify_percentage(G1MaxNewSizePercent, "G1MaxNewSizePercent");
+ status = status && verify_interval(G1NewSizePercent, 0, G1MaxNewSizePercent, "G1NewSizePercent");
+
status = status && verify_percentage(InitiatingHeapOccupancyPercent,
"InitiatingHeapOccupancyPercent");
status = status && verify_min_value(G1RefProcDrainInterval, 1,
@@ -2681,9 +2682,10 @@
describe_range_error(errcode);
return JNI_EINVAL;
}
- FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size);
+ set_min_heap_size((uintx)long_initial_heap_size);
// Currently the minimum size and the initial heap sizes are the same.
- set_min_heap_size(InitialHeapSize);
+ // Can be overridden with -XX:InitialHeapSize.
+ FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size);
// -Xmx
} else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
julong long_max_heap_size = 0;
@@ -3643,6 +3645,11 @@
"Incompatible compilation policy selected", NULL);
}
}
+ // Set NmethodSweepFraction after the size of the code cache is adapted (in case of tiered)
+ if (FLAG_IS_DEFAULT(NmethodSweepFraction)) {
+ FLAG_SET_DEFAULT(NmethodSweepFraction, 1 + ReservedCodeCacheSize / (16 * M));
+ }
+
// Set heap size based on available physical memory
set_heap_size();
--- a/hotspot/src/share/vm/runtime/globals.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/runtime/globals.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -2954,6 +2954,9 @@
product(intx, MaxRecursiveInlineLevel, 1, \
"maximum number of nested recursive calls that are inlined") \
\
+ develop(intx, MaxForceInlineLevel, 100, \
+ "maximum number of nested @ForceInline calls that are inlined") \
+ \
product_pd(intx, InlineSmallCode, \
"Only inline already compiled methods if their code size is " \
"less than this") \
@@ -3019,9 +3022,6 @@
notproduct(intx, ZombieALotInterval, 5, \
"Number of exits until ZombieALot kicks in") \
\
- develop(bool, StressNonEntrant, false, \
- "Mark nmethods non-entrant at registration") \
- \
diagnostic(intx, MallocVerifyInterval, 0, \
"If non-zero, verify C heap after every N calls to " \
"malloc/realloc/free") \
@@ -3289,7 +3289,7 @@
"Exit the VM if we fill the code cache") \
\
product(bool, UseCodeCacheFlushing, true, \
- "Attempt to clean the code cache before shutting off compiler") \
+ "Remove cold/old nmethods from the code cache") \
\
/* interpreter debugging */ \
develop(intx, BinarySwitchThreshold, 5, \
--- a/hotspot/src/share/vm/runtime/sweeper.cpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/runtime/sweeper.cpp Wed Jul 05 19:22:38 2017 +0200
@@ -112,14 +112,13 @@
if (_records != NULL) {
_records[_sweep_index].traversal = _traversals;
_records[_sweep_index].traversal_mark = nm->_stack_traversal_mark;
- _records[_sweep_index].invocation = _invocations;
+ _records[_sweep_index].invocation = _sweep_fractions_left;
_records[_sweep_index].compile_id = nm->compile_id();
_records[_sweep_index].kind = nm->compile_kind();
_records[_sweep_index].state = nm->_state;
_records[_sweep_index].vep = nm->verified_entry_point();
_records[_sweep_index].uep = nm->entry_point();
_records[_sweep_index].line = line;
-
_sweep_index = (_sweep_index + 1) % SweeperLogEntries;
}
}
@@ -127,26 +126,29 @@
#define SWEEP(nm)
#endif
-nmethod* NMethodSweeper::_current = NULL; // Current nmethod
-long NMethodSweeper::_traversals = 0; // Nof. stack traversals performed
-int NMethodSweeper::_seen = 0; // Nof. nmethods we have currently processed in current pass of CodeCache
-int NMethodSweeper::_flushed_count = 0; // Nof. nmethods flushed in current sweep
-int NMethodSweeper::_zombified_count = 0; // Nof. nmethods made zombie in current sweep
-int NMethodSweeper::_marked_count = 0; // Nof. nmethods marked for reclaim in current sweep
-
-volatile int NMethodSweeper::_invocations = 0; // Nof. invocations left until we are completed with this pass
-volatile int NMethodSweeper::_sweep_started = 0; // Whether a sweep is in progress.
+nmethod* NMethodSweeper::_current = NULL; // Current nmethod
+long NMethodSweeper::_traversals = 0; // Stack scan count, also sweep ID.
+long NMethodSweeper::_time_counter = 0; // Virtual time used to periodically invoke sweeper
+long NMethodSweeper::_last_sweep = 0; // Value of _time_counter when the last sweep happened
+int NMethodSweeper::_seen = 0; // Nof. nmethod we have currently processed in current pass of CodeCache
+int NMethodSweeper::_flushed_count = 0; // Nof. nmethods flushed in current sweep
+int NMethodSweeper::_zombified_count = 0; // Nof. nmethods made zombie in current sweep
+int NMethodSweeper::_marked_for_reclamation_count = 0; // Nof. nmethods marked for reclaim in current sweep
-jint NMethodSweeper::_locked_seen = 0;
-jint NMethodSweeper::_not_entrant_seen_on_stack = 0;
-bool NMethodSweeper::_request_mark_phase = false;
+volatile bool NMethodSweeper::_should_sweep = true; // Indicates if we should invoke the sweeper
+volatile int NMethodSweeper::_sweep_fractions_left = 0; // Nof. invocations left until we are completed with this pass
+volatile int NMethodSweeper::_sweep_started = 0; // Flag to control conc sweeper
+volatile int NMethodSweeper::_bytes_changed = 0; // Counts the total nmethod size if the nmethod changed from:
+ // 1) alive -> not_entrant
+ // 2) not_entrant -> zombie
+ // 3) zombie -> marked_for_reclamation
-int NMethodSweeper::_total_nof_methods_reclaimed = 0;
-jlong NMethodSweeper::_total_time_sweeping = 0;
-jlong NMethodSweeper::_total_time_this_sweep = 0;
-jlong NMethodSweeper::_peak_sweep_time = 0;
-jlong NMethodSweeper::_peak_sweep_fraction_time = 0;
-int NMethodSweeper::_hotness_counter_reset_val = 0;
+int NMethodSweeper::_total_nof_methods_reclaimed = 0; // Accumulated nof methods flushed
+jlong NMethodSweeper::_total_time_sweeping = 0; // Accumulated time sweeping
+jlong NMethodSweeper::_total_time_this_sweep = 0; // Total time this sweep
+jlong NMethodSweeper::_peak_sweep_time = 0; // Peak time for a full sweep
+jlong NMethodSweeper::_peak_sweep_fraction_time = 0; // Peak time sweeping one fraction
+int NMethodSweeper::_hotness_counter_reset_val = 0;
class MarkActivationClosure: public CodeBlobClosure {
@@ -197,13 +199,16 @@
return;
}
+ // Increase time so that we can estimate when to invoke the sweeper again.
+ _time_counter++;
+
// Check for restart
assert(CodeCache::find_blob_unsafe(_current) == _current, "Sweeper nmethod cached state invalid");
- if (!sweep_in_progress() && need_marking_phase()) {
- _seen = 0;
- _invocations = NmethodSweepFraction;
- _current = CodeCache::first_nmethod();
- _traversals += 1;
+ if (!sweep_in_progress()) {
+ _seen = 0;
+ _sweep_fractions_left = NmethodSweepFraction;
+ _current = CodeCache::first_nmethod();
+ _traversals += 1;
_total_time_this_sweep = 0;
if (PrintMethodFlushing) {
@@ -211,10 +216,6 @@
}
Threads::nmethods_do(&mark_activation_closure);
- // reset the flags since we started a scan from the beginning.
- reset_nmethod_marking();
- _locked_seen = 0;
- _not_entrant_seen_on_stack = 0;
} else {
// Only set hotness counter
Threads::nmethods_do(&set_hotness_closure);
@@ -222,14 +223,48 @@
OrderAccess::storestore();
}
-
+/**
+ * This function invokes the sweeper if at least one of the three conditions is met:
+ * (1) The code cache is getting full
+ * (2) There are sufficient state changes in/since the last sweep.
+ * (3) We have not been sweeping for 'some time'
+ */
void NMethodSweeper::possibly_sweep() {
assert(JavaThread::current()->thread_state() == _thread_in_vm, "must run in vm mode");
if (!MethodFlushing || !sweep_in_progress()) {
return;
}
- if (_invocations > 0) {
+ // If there was no state change while nmethod sweeping, 'should_sweep' will be false.
+ // This is one of the two places where should_sweep can be set to true. The general
+ // idea is as follows: If there is enough free space in the code cache, there is no
+ // need to invoke the sweeper. The following formula (which determines whether to invoke
+ // the sweeper or not) depends on the assumption that for larger ReservedCodeCacheSizes
+ // we need less frequent sweeps than for smaller ReservedCodecCacheSizes. Furthermore,
+ // the formula considers how much space in the code cache is currently used. Here are
+ // some examples that will (hopefully) help in understanding.
+ //
+ // Small ReservedCodeCacheSizes: (e.g., < 16M) We invoke the sweeper every time, since
+ // the result of the division is 0. This
+ // keeps the used code cache size small
+ // (important for embedded Java)
+ // Large ReservedCodeCacheSize : (e.g., 256M + code cache is 10% full). The formula
+ // computes: (256 / 16) - 1 = 15
+ // As a result, we invoke the sweeper after
+ // 15 invocations of 'mark_active_nmethods.
+ // Large ReservedCodeCacheSize: (e.g., 256M + code Cache is 90% full). The formula
+ // computes: (256 / 16) - 10 = 6.
+ if (!_should_sweep) {
+ int time_since_last_sweep = _time_counter - _last_sweep;
+ double wait_until_next_sweep = (ReservedCodeCacheSize / (16 * M)) - time_since_last_sweep -
+ CodeCache::reverse_free_ratio();
+
+ if ((wait_until_next_sweep <= 0.0) || !CompileBroker::should_compile_new_jobs()) {
+ _should_sweep = true;
+ }
+ }
+
+ if (_should_sweep && _sweep_fractions_left > 0) {
// Only one thread at a time will sweep
jint old = Atomic::cmpxchg( 1, &_sweep_started, 0 );
if (old != 0) {
@@ -242,31 +277,46 @@
memset(_records, 0, sizeof(SweeperRecord) * SweeperLogEntries);
}
#endif
- if (_invocations > 0) {
+
+ if (_sweep_fractions_left > 0) {
sweep_code_cache();
- _invocations--;
+ _sweep_fractions_left--;
+ }
+
+ // We are done with sweeping the code cache once.
+ if (_sweep_fractions_left == 0) {
+ _last_sweep = _time_counter;
+ // Reset flag; temporarily disables sweeper
+ _should_sweep = false;
+ // If there was enough state change, 'possibly_enable_sweeper()'
+ // sets '_should_sweep' to true
+ possibly_enable_sweeper();
+ // Reset _bytes_changed only if there was enough state change. _bytes_changed
+ // can further increase by calls to 'report_state_change'.
+ if (_should_sweep) {
+ _bytes_changed = 0;
+ }
}
_sweep_started = 0;
}
}
void NMethodSweeper::sweep_code_cache() {
-
jlong sweep_start_counter = os::elapsed_counter();
- _flushed_count = 0;
- _zombified_count = 0;
- _marked_count = 0;
+ _flushed_count = 0;
+ _zombified_count = 0;
+ _marked_for_reclamation_count = 0;
if (PrintMethodFlushing && Verbose) {
- tty->print_cr("### Sweep at %d out of %d. Invocations left: %d", _seen, CodeCache::nof_nmethods(), _invocations);
+ tty->print_cr("### Sweep at %d out of %d. Invocations left: %d", _seen, CodeCache::nof_nmethods(), _sweep_fractions_left);
}
if (!CompileBroker::should_compile_new_jobs()) {
// If we have turned off compilations we might as well do full sweeps
// in order to reach the clean state faster. Otherwise the sleeping compiler
// threads will slow down sweeping.
- _invocations = 1;
+ _sweep_fractions_left = 1;
}
// We want to visit all nmethods after NmethodSweepFraction
@@ -274,7 +324,7 @@
// remaining number of invocations. This is only an estimate since
// the number of nmethods changes during the sweep so the final
// stage must iterate until it there are no more nmethods.
- int todo = (CodeCache::nof_nmethods() - _seen) / _invocations;
+ int todo = (CodeCache::nof_nmethods() - _seen) / _sweep_fractions_left;
int swept_count = 0;
@@ -286,11 +336,11 @@
MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
// The last invocation iterates until there are no more nmethods
- for (int i = 0; (i < todo || _invocations == 1) && _current != NULL; i++) {
+ for (int i = 0; (i < todo || _sweep_fractions_left == 1) && _current != NULL; i++) {
swept_count++;
if (SafepointSynchronize::is_synchronizing()) { // Safepoint request
if (PrintMethodFlushing && Verbose) {
- tty->print_cr("### Sweep at %d out of %d, invocation: %d, yielding to safepoint", _seen, CodeCache::nof_nmethods(), _invocations);
+ tty->print_cr("### Sweep at %d out of %d, invocation: %d, yielding to safepoint", _seen, CodeCache::nof_nmethods(), _sweep_fractions_left);
}
MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
@@ -314,19 +364,7 @@
}
}
- assert(_invocations > 1 || _current == NULL, "must have scanned the whole cache");
-
- if (!sweep_in_progress() && !need_marking_phase() && (_locked_seen || _not_entrant_seen_on_stack)) {
- // we've completed a scan without making progress but there were
- // nmethods we were unable to process either because they were
- // locked or were still on stack. We don't have to aggressively
- // clean them up so just stop scanning. We could scan once more
- // but that complicates the control logic and it's unlikely to
- // matter much.
- if (PrintMethodFlushing) {
- tty->print_cr("### Couldn't make progress on some nmethods so stopping sweep");
- }
- }
+ assert(_sweep_fractions_left > 1 || _current == NULL, "must have scanned the whole cache");
jlong sweep_end_counter = os::elapsed_counter();
jlong sweep_time = sweep_end_counter - sweep_start_counter;
@@ -340,21 +378,21 @@
event.set_starttime(sweep_start_counter);
event.set_endtime(sweep_end_counter);
event.set_sweepIndex(_traversals);
- event.set_sweepFractionIndex(NmethodSweepFraction - _invocations + 1);
+ event.set_sweepFractionIndex(NmethodSweepFraction - _sweep_fractions_left + 1);
event.set_sweptCount(swept_count);
event.set_flushedCount(_flushed_count);
- event.set_markedCount(_marked_count);
+ event.set_markedCount(_marked_for_reclamation_count);
event.set_zombifiedCount(_zombified_count);
event.commit();
}
#ifdef ASSERT
if(PrintMethodFlushing) {
- tty->print_cr("### sweeper: sweep time(%d): " INT64_FORMAT, _invocations, (jlong)sweep_time);
+ tty->print_cr("### sweeper: sweep time(%d): " INT64_FORMAT, _sweep_fractions_left, (jlong)sweep_time);
}
#endif
- if (_invocations == 1) {
+ if (_sweep_fractions_left == 1) {
_peak_sweep_time = MAX2(_peak_sweep_time, _total_time_this_sweep);
log_sweep("finished");
}
@@ -368,12 +406,37 @@
// it only makes sense to re-enable compilation if we have actually freed memory.
// Note that typically several kB are released for sweeping 16MB of the code
// cache. As a result, 'freed_memory' > 0 to restart the compiler.
- if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() && (freed_memory > 0))) {
+ if (!CompileBroker::should_compile_new_jobs() && (freed_memory > 0)) {
CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation);
log_sweep("restart_compiler");
}
}
+/**
+ * This function updates the sweeper statistics that keep track of nmethods
+ * state changes. If there is 'enough' state change, the sweeper is invoked
+ * as soon as possible. There can be data races on _bytes_changed. The data
+ * races are benign, since it does not matter if we loose a couple of bytes.
+ * In the worst case we call the sweeper a little later. Also, we are guaranteed
+ * to invoke the sweeper if the code cache gets full.
+ */
+void NMethodSweeper::report_state_change(nmethod* nm) {
+ _bytes_changed += nm->total_size();
+ possibly_enable_sweeper();
+}
+
+/**
+ * Function determines if there was 'enough' state change in the code cache to invoke
+ * the sweeper again. Currently, we determine 'enough' as more than 1% state change in
+ * the code cache since the last sweep.
+ */
+void NMethodSweeper::possibly_enable_sweeper() {
+ double percent_changed = ((double)_bytes_changed / (double)ReservedCodeCacheSize) * 100;
+ if (percent_changed > 1.0) {
+ _should_sweep = true;
+ }
+}
+
class NMethodMarker: public StackObj {
private:
CompilerThread* _thread;
@@ -424,9 +487,6 @@
MutexLocker cl(CompiledIC_lock);
nm->cleanup_inline_caches();
SWEEP(nm);
- } else {
- _locked_seen++;
- SWEEP(nm);
}
return freed_memory;
}
@@ -448,8 +508,9 @@
tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (zombie) being marked for reclamation", nm->compile_id(), nm);
}
nm->mark_for_reclamation();
- request_nmethod_marking();
- _marked_count++;
+ // Keep track of code cache state change
+ _bytes_changed += nm->total_size();
+ _marked_for_reclamation_count++;
SWEEP(nm);
}
} else if (nm->is_not_entrant()) {
@@ -459,18 +520,14 @@
if (PrintMethodFlushing && Verbose) {
tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (not entrant) being made zombie", nm->compile_id(), nm);
}
+ // Code cache state change is tracked in make_zombie()
nm->make_zombie();
- request_nmethod_marking();
_zombified_count++;
SWEEP(nm);
} else {
// Still alive, clean up its inline caches
MutexLocker cl(CompiledIC_lock);
nm->cleanup_inline_caches();
- // we coudn't transition this nmethod so don't immediately
- // request a rescan. If this method stays on the stack for a
- // long time we don't want to keep rescanning the code cache.
- _not_entrant_seen_on_stack++;
SWEEP(nm);
}
} else if (nm->is_unloaded()) {
@@ -485,8 +542,8 @@
release_nmethod(nm);
_flushed_count++;
} else {
+ // Code cache state change is tracked in make_zombie()
nm->make_zombie();
- request_nmethod_marking();
_zombified_count++;
SWEEP(nm);
}
@@ -514,7 +571,11 @@
// The second condition ensures that methods are not immediately made not-entrant
// after compilation.
nm->make_not_entrant();
- request_nmethod_marking();
+ // Code cache state change is tracked in make_not_entrant()
+ if (PrintMethodFlushing && Verbose) {
+ tty->print_cr("### Nmethod %d/" PTR_FORMAT "made not-entrant: hotness counter %d/%d threshold %f",
+ nm->compile_id(), nm, nm->hotness_counter(), reset_val, threshold);
+ }
}
}
}
--- a/hotspot/src/share/vm/runtime/sweeper.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/runtime/sweeper.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -53,22 +53,22 @@
// is full.
class NMethodSweeper : public AllStatic {
- static long _traversals; // Stack scan count, also sweep ID.
- static nmethod* _current; // Current nmethod
- static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache
- static int _flushed_count; // Nof. nmethods flushed in current sweep
- static int _zombified_count; // Nof. nmethods made zombie in current sweep
- static int _marked_count; // Nof. nmethods marked for reclaim in current sweep
+ static long _traversals; // Stack scan count, also sweep ID.
+ static long _time_counter; // Virtual time used to periodically invoke sweeper
+ static long _last_sweep; // Value of _time_counter when the last sweep happened
+ static nmethod* _current; // Current nmethod
+ static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache
+ static int _flushed_count; // Nof. nmethods flushed in current sweep
+ static int _zombified_count; // Nof. nmethods made zombie in current sweep
+ static int _marked_for_reclamation_count; // Nof. nmethods marked for reclaim in current sweep
- static volatile int _invocations; // No. of invocations left until we are completed with this pass
- static volatile int _sweep_started; // Flag to control conc sweeper
-
- //The following are reset in mark_active_nmethods and synchronized by the safepoint
- static bool _request_mark_phase; // Indicates that a change has happend and we need another mark pahse,
- // always checked and reset at a safepoint so memory will be in sync.
- static int _locked_seen; // Number of locked nmethods encountered during the scan
- static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack
-
+ static volatile int _sweep_fractions_left; // Nof. invocations left until we are completed with this pass
+ static volatile int _sweep_started; // Flag to control conc sweeper
+ static volatile bool _should_sweep; // Indicates if we should invoke the sweeper
+ static volatile int _bytes_changed; // Counts the total nmethod size if the nmethod changed from:
+ // 1) alive -> not_entrant
+ // 2) not_entrant -> zombie
+ // 3) zombie -> marked_for_reclamation
// Stat counters
static int _total_nof_methods_reclaimed; // Accumulated nof methods flushed
static jlong _total_time_sweeping; // Accumulated time sweeping
@@ -81,9 +81,6 @@
static bool sweep_in_progress();
static void sweep_code_cache();
- static void request_nmethod_marking() { _request_mark_phase = true; }
- static void reset_nmethod_marking() { _request_mark_phase = false; }
- static bool need_marking_phase() { return _request_mark_phase; }
static int _hotness_counter_reset_val;
@@ -109,13 +106,8 @@
static int sort_nmethods_by_hotness(nmethod** nm1, nmethod** nm2);
static int hotness_counter_reset_val();
-
- static void notify() {
- // Request a new sweep of the code cache from the beginning. No
- // need to synchronize the setting of this flag since it only
- // changes to false at safepoint so we can never overwrite it with false.
- request_nmethod_marking();
- }
+ static void report_state_change(nmethod* nm);
+ static void possibly_enable_sweeper();
};
#endif // SHARE_VM_RUNTIME_SWEEPER_HPP
--- a/hotspot/src/share/vm/utilities/globalDefinitions.hpp Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/src/share/vm/utilities/globalDefinitions.hpp Wed Jul 05 19:22:38 2017 +0200
@@ -456,6 +456,13 @@
return (void*) align_size_up_((uintptr_t)addr, size);
}
+// Align down with a lower bound. If the aligning results in 0, return 'alignment'.
+
+inline size_t align_size_down_bounded(size_t size, size_t alignment) {
+ size_t aligned_size = align_size_down_(size, alignment);
+ return aligned_size > 0 ? aligned_size : alignment;
+}
+
// Clamp an address to be within a specific page
// 1. If addr is on the page it is returned as is
// 2. If addr is above the page_address the start of the *next* page will be returned
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/intrinsics/mathexact/GVNTest.java Wed Jul 05 19:22:38 2017 +0200
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8028207
+ * @summary Verify that GVN doesn't mess up the two addExacts
+ * @compile GVNTest.java
+ * @run main GVNTest
+ *
+ */
+
+public class GVNTest {
+ public static int result = 0;
+ public static int value = 93;
+ public static void main(String[] args) {
+ for (int i = 0; i < 50000; ++i) {
+ result = runTest(value + i);
+ result = runTest(value + i);
+ result = runTest(value + i);
+ result = runTest(value + i);
+ result = runTest(value + i);
+ }
+ }
+
+ public static int runTest(int value) {
+ int v = value + value;
+ int sum = 0;
+ if (v < 4032) {
+ for (int i = 0; i < 1023; ++i) {
+ sum += Math.addExact(value, value);
+ }
+ } else {
+ for (int i = 0; i < 321; ++i) {
+ sum += Math.addExact(value, value);
+ }
+ }
+ return sum + v;
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/intrinsics/mathexact/SplitThruPhiTest.java Wed Jul 05 19:22:38 2017 +0200
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8028198
+ * @summary Verify that split through phi does the right thing
+ * @compile SplitThruPhiTest.java
+ * @run main SplitThruPhiTest
+ *
+ */
+
+public class SplitThruPhiTest {
+ public static volatile int value = 19;
+ public static int store = 0;
+ public static void main(String[] args) {
+ for (int i = 0; i < 150000; ++i) {
+ store = runTest(value);
+ }
+ }
+
+ public static int runTest(int val) {
+ int result = Math.addExact(val, 1);
+ int total = 0;
+ for (int i = val; i < 200; i = Math.addExact(i, 1)) {
+ total += i;
+ }
+ return total;
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/profiling/TestUnexpectedProfilingMismatch.java Wed Jul 05 19:22:38 2017 +0200
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8027631
+ * @summary profiling of arguments at calls cannot rely on signature of callee for types
+ * @run main/othervm -XX:-BackgroundCompilation -XX:TieredStopAtLevel=3 -XX:TypeProfileLevel=111 -XX:Tier3InvocationThreshold=200 -XX:Tier0InvokeNotifyFreqLog=7 TestUnexpectedProfilingMismatch
+ *
+ */
+
+import java.lang.invoke.*;
+
+public class TestUnexpectedProfilingMismatch {
+
+ static class A {
+ }
+
+ static class B {
+ }
+
+ static void mA(A a) {
+ }
+
+ static void mB(B b) {
+ }
+
+ static final MethodHandle mhA;
+ static final MethodHandle mhB;
+ static {
+ MethodHandles.Lookup lookup = MethodHandles.lookup();
+ MethodType mt = MethodType.methodType(void.class, A.class);
+ MethodHandle res = null;
+ try {
+ res = lookup.findStatic(TestUnexpectedProfilingMismatch.class, "mA", mt);
+ } catch(NoSuchMethodException ex) {
+ } catch(IllegalAccessException ex) {
+ }
+ mhA = res;
+ mt = MethodType.methodType(void.class, B.class);
+ try {
+ res = lookup.findStatic(TestUnexpectedProfilingMismatch.class, "mB", mt);
+ } catch(NoSuchMethodException ex) {
+ } catch(IllegalAccessException ex) {
+ }
+ mhB = res;
+ }
+
+ void m1(A a, boolean doit) throws Throwable {
+ if (doit) {
+ mhA.invoke(a);
+ }
+ }
+
+ void m2(B b) throws Throwable {
+ mhB.invoke(b);
+ }
+
+ static public void main(String[] args) {
+ TestUnexpectedProfilingMismatch tih = new TestUnexpectedProfilingMismatch();
+ A a = new A();
+ B b = new B();
+ try {
+ for (int i = 0; i < 256 - 1; i++) {
+ tih.m1(a, true);
+ }
+ // Will trigger the compilation but will also run once
+ // more interpreted with a non null MDO which it will
+ // update. Make it skip the body of the method.
+ tih.m1(a, false);
+ // Compile this one as well and do the profiling
+ for (int i = 0; i < 256; i++) {
+ tih.m2(b);
+ }
+ // Will run and see a conflict
+ tih.m1(a, true);
+ } catch(Throwable ex) {
+ ex.printStackTrace();
+ }
+ System.out.println("TEST PASSED");
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/profiling/unloadingconflict/B.java Wed Jul 05 19:22:38 2017 +0200
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+public class B {
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/profiling/unloadingconflict/TestProfileConflictClassUnloading.java Wed Jul 05 19:22:38 2017 +0200
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8027572
+ * @summary class unloading resets profile, method compiled after the profile is first set and before class loading sets unknown bit with not recorded class
+ * @build B
+ * @run main/othervm -XX:TypeProfileLevel=222 -XX:-BackgroundCompilation TestProfileConflictClassUnloading
+ *
+ */
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.nio.file.Paths;
+
+public class TestProfileConflictClassUnloading {
+ static class A {
+ }
+
+
+ static void m1(Object o) {
+ }
+
+ static void m2(Object o) {
+ m1(o);
+ }
+
+ static void m3(A a, boolean do_call) {
+ if (!do_call) {
+ return;
+ }
+ m2(a);
+ }
+
+ public static ClassLoader newClassLoader() {
+ try {
+ return new URLClassLoader(new URL[] {
+ Paths.get(System.getProperty("test.classes",".")).toUri().toURL(),
+ }, null);
+ } catch (MalformedURLException e){
+ throw new RuntimeException("Unexpected URL conversion failure", e);
+ }
+ }
+
+ public static void main(String[] args) throws Exception {
+ ClassLoader loader = newClassLoader();
+ Object o = loader.loadClass("B").newInstance();
+ // collect conflicting profiles
+ for (int i = 0; i < 5000; i++) {
+ m2(o);
+ }
+ // prepare for conflict
+ A a = new A();
+ for (int i = 0; i < 5000; i++) {
+ m3(a, false);
+ }
+ // unload class in profile
+ o = null;
+ loader = null;
+ System.gc();
+ // record the conflict
+ m3(a, true);
+ // trigger another GC
+ System.gc();
+ }
+}
--- a/hotspot/test/gc/arguments/TestMaxHeapSizeTools.java Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/test/gc/arguments/TestMaxHeapSizeTools.java Wed Jul 05 19:22:38 2017 +0200
@@ -64,32 +64,29 @@
long newPlusOldSize = values[0] + values[1];
long smallValue = newPlusOldSize / 2;
long largeValue = newPlusOldSize * 2;
+ long maxHeapSize = largeValue + (2 * 1024 * 1024);
// -Xms is not set
- checkErgonomics(new String[] { gcflag, "-Xmx16M" }, values, -1, -1);
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue);
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=0" }, values, -1, -1);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize }, values, -1, -1);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-XX:InitialHeapSize=" + smallValue }, values, -1, smallValue);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-XX:InitialHeapSize=0" }, values, -1, -1);
// -Xms is set to zero
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0" }, values, -1, -1);
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue);
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=0" }, values, -1, -1);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-Xms0" }, values, -1, -1);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-Xms0", "-XX:InitialHeapSize=" + smallValue }, values, -1, smallValue);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-Xms0", "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-Xms0", "-XX:InitialHeapSize=0" }, values, -1, -1);
// -Xms is set to small value
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue }, values, -1, -1);
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=" + largeValue }, values, smallValue, largeValue);
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=0" }, values, smallValue, -1);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-Xms" + smallValue }, values, -1, -1);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-Xms" + smallValue, "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-Xms" + smallValue, "-XX:InitialHeapSize=" + largeValue }, values, smallValue, largeValue);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-Xms" + smallValue, "-XX:InitialHeapSize=0" }, values, smallValue, -1);
// -Xms is set to large value
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue }, values, largeValue, largeValue);
- // the next case has already been checked elsewhere and gives an error
- // checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
- // the next case has already been checked elsewhere too
- // checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=" + largeValue }, values, values[0], largeValue);
- checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=0" }, values, largeValue, -1);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-Xms" + largeValue }, values, largeValue, largeValue);
+ checkErgonomics(new String[] { gcflag, "-Xmx" + maxHeapSize, "-Xms" + largeValue, "-XX:InitialHeapSize=0" }, values, largeValue, -1);
}
private static long align_up(long value, long alignment) {
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/arguments/TestMaxNewSize.java Wed Jul 05 19:22:38 2017 +0200
@@ -0,0 +1,122 @@
+/*
+* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+*
+* This code is free software; you can redistribute it and/or modify it
+* under the terms of the GNU General Public License version 2 only, as
+* published by the Free Software Foundation.
+*
+* This code is distributed in the hope that it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+* version 2 for more details (a copy is included in the LICENSE file that
+* accompanied this code).
+*
+* You should have received a copy of the GNU General Public License version
+* 2 along with this work; if not, write to the Free Software Foundation,
+* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+*
+* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+* or visit www.oracle.com if you need additional information or have any
+* questions.
+*/
+
+/*
+ * @test TestMaxNewSize
+ * @key gc
+ * @bug 7057939
+ * @summary Make sure that MaxNewSize always has a useful value after argument
+ * processing.
+ * @library /testlibrary
+ * @build TestMaxNewSize
+ * @run main TestMaxNewSize -XX:+UseSerialGC
+ * @run main TestMaxNewSize -XX:+UseParallelGC
+ * @run main TestMaxNewSize -XX:+UseConcMarkSweepGC
+ * @run main TestMaxNewSize -XX:+UseG1GC
+ * @author thomas.schatzl@oracle.com, jesper.wilhelmsson@oracle.com
+ */
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import java.math.BigInteger;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import com.oracle.java.testlibrary.*;
+
+public class TestMaxNewSize {
+
+ private static void checkMaxNewSize(String[] flags, int heapsize) throws Exception {
+ BigInteger actual = new BigInteger(getMaxNewSize(flags));
+ System.out.println(actual);
+ if (actual.compareTo(new BigInteger((new Long(heapsize)).toString())) == 1) {
+ throw new RuntimeException("MaxNewSize value set to \"" + actual +
+ "\", expected otherwise when running with the following flags: " + Arrays.asList(flags).toString());
+ }
+ }
+
+ private static void checkIncompatibleNewSize(String[] flags) throws Exception {
+ ArrayList<String> finalargs = new ArrayList<String>();
+ finalargs.addAll(Arrays.asList(flags));
+ finalargs.add("-version");
+
+ ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
+ OutputAnalyzer output = new OutputAnalyzer(pb.start());
+ output.shouldContain("Initial young gen size set larger than the maximum young gen size");
+ }
+
+ private static boolean isRunningG1(String[] args) {
+ for (int i = 0; i < args.length; i++) {
+ if (args[i].contains("+UseG1GC")) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ private static String getMaxNewSize(String[] flags) throws Exception {
+ ArrayList<String> finalargs = new ArrayList<String>();
+ finalargs.addAll(Arrays.asList(flags));
+ if (isRunningG1(flags)) {
+ finalargs.add("-XX:G1HeapRegionSize=1M");
+ }
+ finalargs.add("-XX:+PrintFlagsFinal");
+ finalargs.add("-version");
+
+ ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
+ OutputAnalyzer output = new OutputAnalyzer(pb.start());
+ output.shouldHaveExitValue(0);
+ String stdout = output.getStdout();
+ //System.out.println(stdout);
+ return getFlagValue("MaxNewSize", stdout);
+ }
+
+ private static String getFlagValue(String flag, String where) {
+ Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where);
+ if (!m.find()) {
+ throw new RuntimeException("Could not find value for flag " + flag + " in output string");
+ }
+ String match = m.group();
+ return match.substring(match.lastIndexOf(" ") + 1, match.length());
+ }
+
+ public static void main(String args[]) throws Exception {
+ String gcName = args[0];
+ final int M32 = 32 * 1024 * 1024;
+ final int M64 = 64 * 1024 * 1024;
+ final int M96 = 96 * 1024 * 1024;
+ final int M128 = 128 * 1024 * 1024;
+ checkMaxNewSize(new String[] { gcName, "-Xmx128M" }, M128);
+ checkMaxNewSize(new String[] { gcName, "-Xmx128M", "-XX:NewRatio=5" }, M128);
+ checkMaxNewSize(new String[] { gcName, "-Xmx128M", "-XX:NewSize=32M" }, M128);
+ checkMaxNewSize(new String[] { gcName, "-Xmx128M", "-XX:OldSize=96M" }, M128);
+ checkMaxNewSize(new String[] { gcName, "-Xmx128M", "-XX:MaxNewSize=32M" }, M32);
+ checkMaxNewSize(new String[] { gcName, "-Xmx128M", "-XX:NewSize=32M", "-XX:MaxNewSize=32M" }, M32);
+ checkMaxNewSize(new String[] { gcName, "-Xmx128M", "-XX:NewRatio=6", "-XX:MaxNewSize=32M" }, M32);
+ checkMaxNewSize(new String[] { gcName, "-Xmx128M", "-Xms96M" }, M128);
+ checkMaxNewSize(new String[] { gcName, "-Xmx96M", "-Xms96M" }, M96);
+ checkMaxNewSize(new String[] { gcName, "-XX:NewSize=128M", "-XX:MaxNewSize=50M"}, M128);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/g1/TestHumongousCodeCacheRoots.java Wed Jul 05 19:22:38 2017 +0200
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @key regression
+ * @key gc
+ * @bug 8027756
+ * @library /testlibrary /testlibrary/whitebox
+ * @build TestHumongousCodeCacheRoots
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @summary Humongous objects may have references from the code cache
+ * @run main TestHumongousCodeCacheRoots
+*/
+
+import com.oracle.java.testlibrary.*;
+import sun.hotspot.WhiteBox;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
+class TestHumongousCodeCacheRootsHelper {
+
+ static final int n = 1000000;
+ static final int[] AA = new int[n];
+ static final int[] BB = new int[n];
+
+ public static void main(String args[]) throws Exception {
+ // do some work so that the compiler compiles this method, inlining the
+ // reference to the integer array (which is a humonguous object) into
+ // the code cache.
+ for(int i = 0; i < n; i++) {
+ AA[i] = 0;
+ BB[i] = 0;
+ }
+ // trigger a GC that checks that the verification code allows humongous
+ // objects with code cache roots; objects should be all live here.
+ System.gc();
+
+ // deoptimize everyhing: this should make all compiled code zombies.
+ WhiteBox wb = WhiteBox.getWhiteBox();
+ wb.deoptimizeAll();
+
+ // trigger a GC that checks that the verification code allows humongous
+ // objects with code cache roots; objects should be all live here.
+ System.gc();
+
+ // wait a little for the code cache sweeper to try to clean up zombie nmethods
+ // and unregister the code roots.
+ try { Thread.sleep(5000); } catch (InterruptedException ex) { }
+
+ // do some work on the arrays to make sure that they need to be live after the GCs
+ for(int i = 0; i < n; i++) {
+ AA[i] = 1;
+ BB[i] = 10;
+ }
+
+ System.out.println();
+ }
+}
+
+public class TestHumongousCodeCacheRoots {
+
+ /**
+ * Executes a class in a new VM process with the given parameters.
+ * @param vmargs Arguments to the VM to run
+ * @param classname Name of the class to run
+ * @param arguments Arguments to the class
+ * @param useTestDotJavaDotOpts Use test.java.opts as part of the VM argument string
+ * @return The OutputAnalyzer with the results for the invocation.
+ */
+ public static OutputAnalyzer runWhiteBoxTest(String[] vmargs, String classname, String[] arguments, boolean useTestDotJavaDotOpts) throws Exception {
+ ArrayList<String> finalargs = new ArrayList<String>();
+
+ String[] whiteboxOpts = new String[] {
+ "-Xbootclasspath/a:.",
+ "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
+ "-cp", System.getProperty("java.class.path"),
+ };
+
+ if (useTestDotJavaDotOpts) {
+ // System.getProperty("test.java.opts") is '' if no options is set,
+ // we need to skip such a result
+ String[] externalVMOpts = new String[0];
+ if (System.getProperty("test.java.opts") != null && System.getProperty("test.java.opts").length() != 0) {
+ externalVMOpts = System.getProperty("test.java.opts").split(" ");
+ }
+ finalargs.addAll(Arrays.asList(externalVMOpts));
+ }
+
+ finalargs.addAll(Arrays.asList(vmargs));
+ finalargs.addAll(Arrays.asList(whiteboxOpts));
+ finalargs.add(classname);
+ finalargs.addAll(Arrays.asList(arguments));
+
+ ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
+ OutputAnalyzer output = new OutputAnalyzer(pb.start());
+ output.shouldHaveExitValue(0);
+
+ return output;
+ }
+
+ public static void runTest(String compiler, String[] other) throws Exception {
+ ArrayList<String> joined = new ArrayList<String>();
+ joined.add(compiler);
+ joined.addAll(Arrays.asList(other));
+ runWhiteBoxTest(joined.toArray(new String[0]), TestHumongousCodeCacheRootsHelper.class.getName(),
+ new String[] {}, false);
+ }
+
+ public static void main(String[] args) throws Exception {
+ final String[] baseArguments = new String[] {
+ "-XX:+UseG1GC", "-XX:G1HeapRegionSize=1M", "-Xmx100M", // make sure we get a humongous region
+ "-XX:+UnlockDiagnosticVMOptions",
+ "-XX:InitiatingHeapOccupancyPercent=1", // strong code root marking
+ "-XX:+G1VerifyHeapRegionCodeRoots", "-XX:+VerifyAfterGC", // make sure that verification is run
+ "-XX:NmethodSweepFraction=1", "-XX:NmethodSweepCheckInterval=1", // make the code cache sweep more predictable
+ };
+ runTest("-client", baseArguments);
+ runTest("-server", baseArguments);
+ }
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/memory/ReadFromNoaccessArea.java Wed Jul 05 19:22:38 2017 +0200
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @summary Test that touching noaccess area in class ReservedHeapSpace results in SIGSEGV/ACCESS_VIOLATION
+ * @library /testlibrary /testlibrary/whitebox
+ * @build ReadFromNoaccessArea
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main ReadFromNoaccessArea
+ */
+
+import com.oracle.java.testlibrary.*;
+import sun.hotspot.WhiteBox;
+
+public class ReadFromNoaccessArea {
+
+ public static void main(String args[]) throws Exception {
+ if (!Platform.is64bit()) {
+ System.out.println("ReadFromNoaccessArea tests is useful only on 64bit architecture. Passing silently.");
+ return;
+ }
+
+ ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+ "-Xbootclasspath/a:.",
+ "-XX:+UnlockDiagnosticVMOptions",
+ "-XX:+WhiteBoxAPI",
+ "-XX:+UseCompressedOops",
+ "-XX:HeapBaseMinAddress=33G",
+ DummyClassWithMainTryingToReadFromNoaccessArea.class.getName());
+
+ OutputAnalyzer output = new OutputAnalyzer(pb.start());
+ System.out.println("******* Printing stdout for analysis in case of failure *******");
+ System.out.println(output.getStdout());
+ System.out.println("******* Printing stderr for analysis in case of failure *******");
+ System.out.println(output.getStderr());
+ System.out.println("***************************************************************");
+ if (output.getStdout() != null && output.getStdout().contains("WB_ReadFromNoaccessArea method is useless")) {
+ // Test conditions broken. There is no protected page in ReservedHeapSpace in these circumstances. Silently passing test.
+ return;
+ }
+ if (Platform.isWindows()) {
+ output.shouldContain("EXCEPTION_ACCESS_VIOLATION");
+ } else if (Platform.isOSX()) {
+ output.shouldContain("SIGBUS");
+ } else {
+ output.shouldContain("SIGSEGV");
+ }
+ }
+
+ public static class DummyClassWithMainTryingToReadFromNoaccessArea {
+
+ // This method calls whitebox method reading from noaccess area
+ public static void main(String args[]) throws Exception {
+ WhiteBox.getWhiteBox().readFromNoaccessArea();
+ throw new Exception("Call of readFromNoaccessArea succeeded! This is wrong. Crash expected. Test failed.");
+ }
+ }
+
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/memory/RunUnitTestsConcurrently.java Wed Jul 05 19:22:38 2017 +0200
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @summary Test launches unit tests inside vm concurrently
+ * @library /testlibrary /testlibrary/whitebox
+ * @build RunUnitTestsConcurrently
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI RunUnitTestsConcurrently 30 15000
+ */
+
+import com.oracle.java.testlibrary.*;
+import sun.hotspot.WhiteBox;
+
+public class RunUnitTestsConcurrently {
+
+ private static WhiteBox wb;
+ private static long timeout;
+ private static long timeStamp;
+
+ public static class Worker implements Runnable {
+ @Override
+ public void run() {
+ while (System.currentTimeMillis() - timeStamp < timeout) {
+ WhiteBox.getWhiteBox().runMemoryUnitTests();
+ }
+ }
+ }
+
+ public static void main(String[] args) throws InterruptedException {
+ if (!Platform.isDebugBuild() || !Platform.is64bit()) {
+ return;
+ }
+ wb = WhiteBox.getWhiteBox();
+ System.out.println("Starting threads");
+
+ int threads = Integer.valueOf(args[0]);
+ timeout = Long.valueOf(args[1]);
+
+ timeStamp = System.currentTimeMillis();
+
+ Thread[] threadsArray = new Thread[threads];
+ for (int i = 0; i < threads; i++) {
+ threadsArray[i] = new Thread(new Worker());
+ threadsArray[i].start();
+ }
+ for (int i = 0; i < threads; i++) {
+ threadsArray[i].join();
+ }
+
+ System.out.println("Quitting test.");
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/memory/StressVirtualSpaceResize.java Wed Jul 05 19:22:38 2017 +0200
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @summary Stress test that expands/shrinks VirtualSpace
+ * @library /testlibrary /testlibrary/whitebox
+ * @build StressVirtualSpaceResize
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI StressVirtualSpaceResize
+ */
+
+import sun.hotspot.WhiteBox;
+
+public class StressVirtualSpaceResize {
+
+ public static void main(String args[]) throws Exception {
+ if (WhiteBox.getWhiteBox().stressVirtualSpaceResize(1000, 0xffffL, 0xffffL) != 0)
+ throw new RuntimeException("Whitebox method stressVirtualSpaceResize returned non zero exit code");
+ }
+}
--- a/hotspot/test/testlibrary/whitebox/sun/hotspot/WhiteBox.java Fri Nov 15 07:14:23 2013 -0800
+++ b/hotspot/test/testlibrary/whitebox/sun/hotspot/WhiteBox.java Wed Jul 05 19:22:38 2017 +0200
@@ -144,4 +144,10 @@
// force Full GC
public native void fullGC();
+
+ // Tests on ReservedSpace/VirtualSpace classes
+ public native int stressVirtualSpaceResize(long reservedSpaceSize, long magnitude, long iterations);
+ public native void runMemoryUnitTests();
+ public native void readFromNoaccessArea();
+
}