--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/ci/ciMethod.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,1042 @@
+/*
+ * Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_ciMethod.cpp.incl"
+
+// ciMethod
+//
+// This class represents a methodOop in the HotSpot virtual
+// machine.
+
+
+// ------------------------------------------------------------------
+// ciMethod::ciMethod
+//
+// Loaded method.
+ciMethod::ciMethod(methodHandle h_m) : ciObject(h_m) {
+ assert(h_m() != NULL, "no null method");
+
+ // These fields are always filled in in loaded methods.
+ _flags = ciFlags(h_m()->access_flags());
+
+ // Easy to compute, so fill them in now.
+ _max_stack = h_m()->max_stack();
+ _max_locals = h_m()->max_locals();
+ _code_size = h_m()->code_size();
+ _intrinsic_id = h_m()->intrinsic_id();
+ _handler_count = h_m()->exception_table()->length() / 4;
+ _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
+ _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
+ _is_compilable = !h_m()->is_not_compilable();
+ // Lazy fields, filled in on demand. Require allocation.
+ _code = NULL;
+ _exception_handlers = NULL;
+ _liveness = NULL;
+ _bcea = NULL;
+ _method_blocks = NULL;
+#ifdef COMPILER2
+ _flow = NULL;
+#endif // COMPILER2
+
+ if (JvmtiExport::can_hotswap_or_post_breakpoint() && _is_compilable) {
+ // 6328518 check hotswap conditions under the right lock.
+ MutexLocker locker(Compile_lock);
+ if (Dependencies::check_evol_method(h_m()) != NULL) {
+ _is_compilable = false;
+ }
+ } else {
+ CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
+ }
+
+ if (instanceKlass::cast(h_m()->method_holder())->is_linked()) {
+ _can_be_statically_bound = h_m()->can_be_statically_bound();
+ } else {
+ // Have to use a conservative value in this case.
+ _can_be_statically_bound = false;
+ }
+
+ // Adjust the definition of this condition to be more useful:
+ // %%% take these conditions into account in vtable generation
+ if (!_can_be_statically_bound && h_m()->is_private())
+ _can_be_statically_bound = true;
+ if (_can_be_statically_bound && h_m()->is_abstract())
+ _can_be_statically_bound = false;
+
+ ciEnv *env = CURRENT_ENV;
+ // generating _signature may allow GC and therefore move m.
+ // These fields are always filled in.
+ _name = env->get_object(h_m()->name())->as_symbol();
+ _holder = env->get_object(h_m()->method_holder())->as_instance_klass();
+ ciSymbol* sig_symbol = env->get_object(h_m()->signature())->as_symbol();
+ _signature = new (env->arena()) ciSignature(_holder, sig_symbol);
+ _method_data = NULL;
+ // Take a snapshot of these values, so they will be commensurate with the MDO.
+ if (ProfileInterpreter) {
+ int invcnt = h_m()->interpreter_invocation_count();
+ // if the value overflowed report it as max int
+ _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
+ _interpreter_throwout_count = h_m()->interpreter_throwout_count();
+ } else {
+ _interpreter_invocation_count = 0;
+ _interpreter_throwout_count = 0;
+ }
+ if (_interpreter_invocation_count == 0)
+ _interpreter_invocation_count = 1;
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::ciMethod
+//
+// Unloaded method.
+ciMethod::ciMethod(ciInstanceKlass* holder,
+ ciSymbol* name,
+ ciSymbol* signature) : ciObject(ciMethodKlass::make()) {
+ // These fields are always filled in.
+ _name = name;
+ _holder = holder;
+ _signature = new (CURRENT_ENV->arena()) ciSignature(_holder, signature);
+ _intrinsic_id = vmIntrinsics::_none;
+ _liveness = NULL;
+ _can_be_statically_bound = false;
+ _bcea = NULL;
+ _method_blocks = NULL;
+ _method_data = NULL;
+#ifdef COMPILER2
+ _flow = NULL;
+#endif // COMPILER2
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::load_code
+//
+// Load the bytecodes and exception handler table for this method.
+void ciMethod::load_code() {
+ VM_ENTRY_MARK;
+ assert(is_loaded(), "only loaded methods have code");
+
+ methodOop me = get_methodOop();
+ Arena* arena = CURRENT_THREAD_ENV->arena();
+
+ // Load the bytecodes.
+ _code = (address)arena->Amalloc(code_size());
+ memcpy(_code, me->code_base(), code_size());
+
+ // Revert any breakpoint bytecodes in ci's copy
+ if (_is_compilable && me->number_of_breakpoints() > 0) {
+ BreakpointInfo* bp = instanceKlass::cast(me->method_holder())->breakpoints();
+ for (; bp != NULL; bp = bp->next()) {
+ if (bp->match(me)) {
+ code_at_put(bp->bci(), bp->orig_bytecode());
+ }
+ }
+ }
+
+ // And load the exception table.
+ typeArrayOop exc_table = me->exception_table();
+
+ // Allocate one extra spot in our list of exceptions. This
+ // last entry will be used to represent the possibility that
+ // an exception escapes the method. See ciExceptionHandlerStream
+ // for details.
+ _exception_handlers =
+ (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
+ * (_handler_count + 1));
+ if (_handler_count > 0) {
+ for (int i=0; i<_handler_count; i++) {
+ int base = i*4;
+ _exception_handlers[i] = new (arena) ciExceptionHandler(
+ holder(),
+ /* start */ exc_table->int_at(base),
+ /* limit */ exc_table->int_at(base+1),
+ /* goto pc */ exc_table->int_at(base+2),
+ /* cp index */ exc_table->int_at(base+3));
+ }
+ }
+
+ // Put an entry at the end of our list to represent the possibility
+ // of exceptional exit.
+ _exception_handlers[_handler_count] =
+ new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
+
+ if (CIPrintMethodCodes) {
+ print_codes();
+ }
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::has_linenumber_table
+//
+// length unknown until decompression
+bool ciMethod::has_linenumber_table() const {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ return get_methodOop()->has_linenumber_table();
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::compressed_linenumber_table
+u_char* ciMethod::compressed_linenumber_table() const {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ return get_methodOop()->compressed_linenumber_table();
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::line_number_from_bci
+int ciMethod::line_number_from_bci(int bci) const {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ return get_methodOop()->line_number_from_bci(bci);
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::vtable_index
+//
+// Get the position of this method's entry in the vtable, if any.
+int ciMethod::vtable_index() {
+ check_is_loaded();
+ assert(holder()->is_linked(), "must be linked");
+ VM_ENTRY_MARK;
+ return get_methodOop()->vtable_index();
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::native_entry
+//
+// Get the address of this method's native code, if any.
+address ciMethod::native_entry() {
+ check_is_loaded();
+ assert(flags().is_native(), "must be native method");
+ VM_ENTRY_MARK;
+ methodOop method = get_methodOop();
+ address entry = method->native_function();
+ assert(entry != NULL, "must be valid entry point");
+ return entry;
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::interpreter_entry
+//
+// Get the entry point for running this method in the interpreter.
+address ciMethod::interpreter_entry() {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ methodHandle mh(THREAD, get_methodOop());
+ return Interpreter::entry_for_method(mh);
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::uses_balanced_monitors
+//
+// Does this method use monitors in a strict stack-disciplined manner?
+bool ciMethod::has_balanced_monitors() {
+ check_is_loaded();
+ if (_balanced_monitors) return true;
+
+ // Analyze the method to see if monitors are used properly.
+ VM_ENTRY_MARK;
+ methodHandle method(THREAD, get_methodOop());
+ assert(method->has_monitor_bytecodes(), "should have checked this");
+
+ // Check to see if a previous compilation computed the
+ // monitor-matching analysis.
+ if (method->guaranteed_monitor_matching()) {
+ _balanced_monitors = true;
+ return true;
+ }
+
+ {
+ EXCEPTION_MARK;
+ ResourceMark rm(THREAD);
+ GeneratePairingInfo gpi(method);
+ gpi.compute_map(CATCH);
+ if (!gpi.monitor_safe()) {
+ return false;
+ }
+ method->set_guaranteed_monitor_matching();
+ _balanced_monitors = true;
+ }
+ return true;
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::get_flow_analysis
+ciTypeFlow* ciMethod::get_flow_analysis() {
+#ifdef COMPILER2
+ if (_flow == NULL) {
+ ciEnv* env = CURRENT_ENV;
+ _flow = new (env->arena()) ciTypeFlow(env, this);
+ _flow->do_flow();
+ }
+ return _flow;
+#else // COMPILER2
+ ShouldNotReachHere();
+ return NULL;
+#endif // COMPILER2
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::get_osr_flow_analysis
+ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
+#ifdef COMPILER2
+ // OSR entry points are always place after a call bytecode of some sort
+ assert(osr_bci >= 0, "must supply valid OSR entry point");
+ ciEnv* env = CURRENT_ENV;
+ ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
+ flow->do_flow();
+ return flow;
+#else // COMPILER2
+ ShouldNotReachHere();
+ return NULL;
+#endif // COMPILER2
+}
+
+// ------------------------------------------------------------------
+// ciMethod::liveness_at_bci
+//
+// Which local variables are live at a specific bci?
+MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
+ check_is_loaded();
+ if (_liveness == NULL) {
+ // Create the liveness analyzer.
+ Arena* arena = CURRENT_ENV->arena();
+ _liveness = new (arena) MethodLiveness(arena, this);
+ _liveness->compute_liveness();
+ }
+ MethodLivenessResult result = _liveness->get_liveness_at(bci);
+ if (JvmtiExport::can_access_local_variables() || DeoptimizeALot || CompileTheWorld) {
+ // Keep all locals live for the user's edification and amusement.
+ result.at_put_range(0, result.size(), true);
+ }
+ return result;
+}
+
+// ciMethod::live_local_oops_at_bci
+//
+// find all the live oops in the locals array for a particular bci
+// Compute what the interpreter believes by using the interpreter
+// oopmap generator. This is used as a double check during osr to
+// guard against conservative result from MethodLiveness making us
+// think a dead oop is live. MethodLiveness is conservative in the
+// sense that it may consider locals to be live which cannot be live,
+// like in the case where a local could contain an oop or a primitive
+// along different paths. In that case the local must be dead when
+// those paths merge. Since the interpreter's viewpoint is used when
+// gc'ing an interpreter frame we need to use its viewpoint during
+// OSR when loading the locals.
+
+BitMap ciMethod::live_local_oops_at_bci(int bci) {
+ VM_ENTRY_MARK;
+ InterpreterOopMap mask;
+ OopMapCache::compute_one_oop_map(get_methodOop(), bci, &mask);
+ int mask_size = max_locals();
+ BitMap result(mask_size);
+ result.clear();
+ int i;
+ for (i = 0; i < mask_size ; i++ ) {
+ if (mask.is_oop(i)) result.set_bit(i);
+ }
+ return result;
+}
+
+
+#ifdef COMPILER1
+// ------------------------------------------------------------------
+// ciMethod::bci_block_start
+//
+// Marks all bcis where a new basic block starts
+const BitMap ciMethod::bci_block_start() {
+ check_is_loaded();
+ if (_liveness == NULL) {
+ // Create the liveness analyzer.
+ Arena* arena = CURRENT_ENV->arena();
+ _liveness = new (arena) MethodLiveness(arena, this);
+ _liveness->compute_liveness();
+ }
+
+ return _liveness->get_bci_block_start();
+}
+#endif // COMPILER1
+
+
+// ------------------------------------------------------------------
+// ciMethod::call_profile_at_bci
+//
+// Get the ciCallProfile for the invocation of this method.
+// Also reports receiver types for non-call type checks (if TypeProfileCasts).
+ciCallProfile ciMethod::call_profile_at_bci(int bci) {
+ ResourceMark rm;
+ ciCallProfile result;
+ if (method_data() != NULL && method_data()->is_mature()) {
+ ciProfileData* data = method_data()->bci_to_data(bci);
+ if (data != NULL && data->is_CounterData()) {
+ // Every profiled call site has a counter.
+ int count = data->as_CounterData()->count();
+
+ if (!data->is_ReceiverTypeData()) {
+ result._receiver_count[0] = 0; // that's a definite zero
+ } else { // ReceiverTypeData is a subclass of CounterData
+ ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
+ // In addition, virtual call sites have receiver type information
+ int receivers_count_total = 0;
+ int morphism = 0;
+ for (uint i = 0; i < call->row_limit(); i++) {
+ ciKlass* receiver = call->receiver(i);
+ if (receiver == NULL) continue;
+ morphism += 1;
+ int rcount = call->receiver_count(i);
+ if (rcount == 0) rcount = 1; // Should be valid value
+ receivers_count_total += rcount;
+ // Add the receiver to result data.
+ result.add_receiver(receiver, rcount);
+ // If we extend profiling to record methods,
+ // we will set result._method also.
+ }
+ // Determine call site's morphism.
+ // The call site count could be == (receivers_count_total + 1)
+ // not only in the case of a polymorphic call but also in the case
+ // when a method data snapshot is taken after the site count was updated
+ // but before receivers counters were updated.
+ if (morphism == result._limit) {
+ // There were no array klasses and morphism <= MorphismLimit.
+ if (morphism < ciCallProfile::MorphismLimit ||
+ morphism == ciCallProfile::MorphismLimit &&
+ (receivers_count_total+1) >= count) {
+ result._morphism = morphism;
+ }
+ }
+ // Make the count consistent if this is a call profile. If count is
+ // zero or less, presume that this is a typecheck profile and
+ // do nothing. Otherwise, increase count to be the sum of all
+ // receiver's counts.
+ if (count > 0) {
+ if (count < receivers_count_total) {
+ count = receivers_count_total;
+ }
+ }
+ }
+ result._count = count;
+ }
+ }
+ return result;
+}
+
+// ------------------------------------------------------------------
+// Add new receiver and sort data by receiver's profile count.
+void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
+ // Add new receiver and sort data by receiver's counts when we have space
+ // for it otherwise replace the less called receiver (less called receiver
+ // is placed to the last array element which is not used).
+ // First array's element contains most called receiver.
+ int i = _limit;
+ for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
+ _receiver[i] = _receiver[i-1];
+ _receiver_count[i] = _receiver_count[i-1];
+ }
+ _receiver[i] = receiver;
+ _receiver_count[i] = receiver_count;
+ if (_limit < MorphismLimit) _limit++;
+}
+
+// ------------------------------------------------------------------
+// ciMethod::find_monomorphic_target
+//
+// Given a certain calling environment, find the monomorphic target
+// for the call. Return NULL if the call is not monomorphic in
+// its calling environment, or if there are only abstract methods.
+// The returned method is never abstract.
+// Note: If caller uses a non-null result, it must inform dependencies
+// via assert_unique_concrete_method or assert_leaf_type.
+ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
+ ciInstanceKlass* callee_holder,
+ ciInstanceKlass* actual_recv) {
+ check_is_loaded();
+
+ if (actual_recv->is_interface()) {
+ // %%% We cannot trust interface types, yet. See bug 6312651.
+ return NULL;
+ }
+
+ ciMethod* root_m = resolve_invoke(caller, actual_recv);
+ if (root_m == NULL) {
+ // Something went wrong looking up the actual receiver method.
+ return NULL;
+ }
+ assert(!root_m->is_abstract(), "resolve_invoke promise");
+
+ // Make certain quick checks even if UseCHA is false.
+
+ // Is it private or final?
+ if (root_m->can_be_statically_bound()) {
+ return root_m;
+ }
+
+ if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
+ // Easy case. There is no other place to put a method, so don't bother
+ // to go through the VM_ENTRY_MARK and all the rest.
+ return root_m;
+ }
+
+ // Array methods (clone, hashCode, etc.) are always statically bound.
+ // If we were to see an array type here, we'd return root_m.
+ // However, this method processes only ciInstanceKlasses. (See 4962591.)
+ // The inline_native_clone intrinsic narrows Object to T[] properly,
+ // so there is no need to do the same job here.
+
+ if (!UseCHA) return NULL;
+
+ VM_ENTRY_MARK;
+
+ methodHandle target;
+ {
+ MutexLocker locker(Compile_lock);
+ klassOop context = actual_recv->get_klassOop();
+ target = Dependencies::find_unique_concrete_method(context,
+ root_m->get_methodOop());
+ // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
+ }
+
+#ifndef PRODUCT
+ if (TraceDependencies && target() != NULL && target() != root_m->get_methodOop()) {
+ tty->print("found a non-root unique target method");
+ tty->print_cr(" context = %s", instanceKlass::cast(actual_recv->get_klassOop())->external_name());
+ tty->print(" method = ");
+ target->print_short_name(tty);
+ tty->cr();
+ }
+#endif //PRODUCT
+
+ if (target() == NULL) {
+ return NULL;
+ }
+ if (target() == root_m->get_methodOop()) {
+ return root_m;
+ }
+ if (!root_m->is_public() &&
+ !root_m->is_protected()) {
+ // If we are going to reason about inheritance, it's easiest
+ // if the method in question is public, protected, or private.
+ // If the answer is not root_m, it is conservatively correct
+ // to return NULL, even if the CHA encountered irrelevant
+ // methods in other packages.
+ // %%% TO DO: Work out logic for package-private methods
+ // with the same name but different vtable indexes.
+ return NULL;
+ }
+ return CURRENT_THREAD_ENV->get_object(target())->as_method();
+}
+
+// ------------------------------------------------------------------
+// ciMethod::resolve_invoke
+//
+// Given a known receiver klass, find the target for the call.
+// Return NULL if the call has no target or the target is abstract.
+ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+
+ KlassHandle caller_klass (THREAD, caller->get_klassOop());
+ KlassHandle h_recv (THREAD, exact_receiver->get_klassOop());
+ KlassHandle h_resolved (THREAD, holder()->get_klassOop());
+ symbolHandle h_name (THREAD, name()->get_symbolOop());
+ symbolHandle h_signature (THREAD, signature()->get_symbolOop());
+
+ methodHandle m;
+ // Only do exact lookup if receiver klass has been linked. Otherwise,
+ // the vtable has not been setup, and the LinkResolver will fail.
+ if (h_recv->oop_is_javaArray()
+ ||
+ instanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
+ if (holder()->is_interface()) {
+ m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
+ } else {
+ m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
+ }
+ }
+
+ if (m.is_null()) {
+ // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
+ return NULL;
+ }
+
+ ciMethod* result = this;
+ if (m() != get_methodOop()) {
+ result = CURRENT_THREAD_ENV->get_object(m())->as_method();
+ }
+
+ // Don't return abstract methods because they aren't
+ // optimizable or interesting.
+ if (result->is_abstract()) {
+ return NULL;
+ } else {
+ return result;
+ }
+}
+
+// ------------------------------------------------------------------
+// ciMethod::resolve_vtable_index
+//
+// Given a known receiver klass, find the vtable index for the call.
+// Return methodOopDesc::invalid_vtable_index if the vtable_index is unknown.
+int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
+ check_is_loaded();
+
+ int vtable_index = methodOopDesc::invalid_vtable_index;
+ // Only do lookup if receiver klass has been linked. Otherwise,
+ // the vtable has not been setup, and the LinkResolver will fail.
+ if (!receiver->is_interface()
+ && (!receiver->is_instance_klass() ||
+ receiver->as_instance_klass()->is_linked())) {
+ VM_ENTRY_MARK;
+
+ KlassHandle caller_klass (THREAD, caller->get_klassOop());
+ KlassHandle h_recv (THREAD, receiver->get_klassOop());
+ symbolHandle h_name (THREAD, name()->get_symbolOop());
+ symbolHandle h_signature (THREAD, signature()->get_symbolOop());
+
+ vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);
+ if (vtable_index == methodOopDesc::nonvirtual_vtable_index) {
+ // A statically bound method. Return "no such index".
+ vtable_index = methodOopDesc::invalid_vtable_index;
+ }
+ }
+
+ return vtable_index;
+}
+
+// ------------------------------------------------------------------
+// ciMethod::interpreter_call_site_count
+int ciMethod::interpreter_call_site_count(int bci) {
+ if (method_data() != NULL) {
+ ResourceMark rm;
+ ciProfileData* data = method_data()->bci_to_data(bci);
+ if (data != NULL && data->is_CounterData()) {
+ return scale_count(data->as_CounterData()->count());
+ }
+ }
+ return -1; // unknown
+}
+
+// ------------------------------------------------------------------
+// Adjust a CounterData count to be commensurate with
+// interpreter_invocation_count. If the MDO exists for
+// only 25% of the time the method exists, then the
+// counts in the MDO should be scaled by 4X, so that
+// they can be usefully and stably compared against the
+// invocation counts in methods.
+int ciMethod::scale_count(int count, float prof_factor) {
+ if (count > 0 && method_data() != NULL) {
+ int current_mileage = method_data()->current_mileage();
+ int creation_mileage = method_data()->creation_mileage();
+ int counter_life = current_mileage - creation_mileage;
+ int method_life = interpreter_invocation_count();
+ // counter_life due to backedge_counter could be > method_life
+ if (counter_life > method_life)
+ counter_life = method_life;
+ if (0 < counter_life && counter_life <= method_life) {
+ count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
+ count = (count > 0) ? count : 1;
+ }
+ }
+ return count;
+}
+
+// ------------------------------------------------------------------
+// ciMethod::build_method_data
+//
+// Generate new methodDataOop objects at compile time.
+void ciMethod::build_method_data(methodHandle h_m) {
+ EXCEPTION_CONTEXT;
+ if (is_native() || is_abstract() || h_m()->is_accessor()) return;
+ if (h_m()->method_data() == NULL) {
+ methodOopDesc::build_interpreter_method_data(h_m, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION;
+ }
+ }
+ if (h_m()->method_data() != NULL) {
+ _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data();
+ _method_data->load_data();
+ } else {
+ _method_data = CURRENT_ENV->get_empty_methodData();
+ }
+}
+
+// public, retroactive version
+void ciMethod::build_method_data() {
+ if (_method_data == NULL || _method_data->is_empty()) {
+ GUARDED_VM_ENTRY({
+ build_method_data(get_methodOop());
+ });
+ }
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::method_data
+//
+ciMethodData* ciMethod::method_data() {
+ if (_method_data != NULL) {
+ return _method_data;
+ }
+ VM_ENTRY_MARK;
+ ciEnv* env = CURRENT_ENV;
+ Thread* my_thread = JavaThread::current();
+ methodHandle h_m(my_thread, get_methodOop());
+
+ if (Tier1UpdateMethodData && is_tier1_compile(env->comp_level())) {
+ build_method_data(h_m);
+ }
+
+ if (h_m()->method_data() != NULL) {
+ _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data();
+ _method_data->load_data();
+ } else {
+ _method_data = CURRENT_ENV->get_empty_methodData();
+ }
+ return _method_data;
+
+}
+
+
+// ------------------------------------------------------------------
+// ciMethod::will_link
+//
+// Will this method link in a specific calling context?
+bool ciMethod::will_link(ciKlass* accessing_klass,
+ ciKlass* declared_method_holder,
+ Bytecodes::Code bc) {
+ if (!is_loaded()) {
+ // Method lookup failed.
+ return false;
+ }
+
+ // The link checks have been front-loaded into the get_method
+ // call. This method (ciMethod::will_link()) will be removed
+ // in the future.
+
+ return true;
+}
+
+// ------------------------------------------------------------------
+// ciMethod::should_exclude
+//
+// Should this method be excluded from compilation?
+bool ciMethod::should_exclude() {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ methodHandle mh(THREAD, get_methodOop());
+ bool ignore;
+ return CompilerOracle::should_exclude(mh, ignore);
+}
+
+// ------------------------------------------------------------------
+// ciMethod::should_inline
+//
+// Should this method be inlined during compilation?
+bool ciMethod::should_inline() {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ methodHandle mh(THREAD, get_methodOop());
+ return CompilerOracle::should_inline(mh);
+}
+
+// ------------------------------------------------------------------
+// ciMethod::should_not_inline
+//
+// Should this method be disallowed from inlining during compilation?
+bool ciMethod::should_not_inline() {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ methodHandle mh(THREAD, get_methodOop());
+ return CompilerOracle::should_not_inline(mh);
+}
+
+// ------------------------------------------------------------------
+// ciMethod::should_print_assembly
+//
+// Should the compiler print the generated code for this method?
+bool ciMethod::should_print_assembly() {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ methodHandle mh(THREAD, get_methodOop());
+ return CompilerOracle::should_print(mh);
+}
+
+// ------------------------------------------------------------------
+// ciMethod::break_at_execute
+//
+// Should the compiler insert a breakpoint into the generated code
+// method?
+bool ciMethod::break_at_execute() {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ methodHandle mh(THREAD, get_methodOop());
+ return CompilerOracle::should_break_at(mh);
+}
+
+// ------------------------------------------------------------------
+// ciMethod::has_option
+//
+bool ciMethod::has_option(const char* option) {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ methodHandle mh(THREAD, get_methodOop());
+ return CompilerOracle::has_option_string(mh, option);
+}
+
+// ------------------------------------------------------------------
+// ciMethod::can_be_compiled
+//
+// Have previous compilations of this method succeeded?
+bool ciMethod::can_be_compiled() {
+ check_is_loaded();
+ return _is_compilable;
+}
+
+// ------------------------------------------------------------------
+// ciMethod::set_not_compilable
+//
+// Tell the VM that this method cannot be compiled at all.
+void ciMethod::set_not_compilable() {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ _is_compilable = false;
+ get_methodOop()->set_not_compilable();
+}
+
+// ------------------------------------------------------------------
+// ciMethod::can_be_osr_compiled
+//
+// Have previous compilations of this method succeeded?
+//
+// Implementation note: the VM does not currently keep track
+// of failed OSR compilations per bci. The entry_bci parameter
+// is currently unused.
+bool ciMethod::can_be_osr_compiled(int entry_bci) {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ return !get_methodOop()->access_flags().is_not_osr_compilable();
+}
+
+// ------------------------------------------------------------------
+// ciMethod::has_compiled_code
+bool ciMethod::has_compiled_code() {
+ VM_ENTRY_MARK;
+ return get_methodOop()->code() != NULL;
+}
+
+// ------------------------------------------------------------------
+// ciMethod::instructions_size
+// This is a rough metric for "fat" methods, compared
+// before inlining with InlineSmallCode.
+// The CodeBlob::instructions_size accessor includes
+// junk like exception handler, stubs, and constant table,
+// which are not highly relevant to an inlined method.
+// So we use the more specific accessor nmethod::code_size.
+int ciMethod::instructions_size() {
+ GUARDED_VM_ENTRY(
+ nmethod* code = get_methodOop()->code();
+ // if there's no compiled code or the code was produced by the
+ // tier1 profiler return 0 for the code size. This should
+ // probably be based on the compilation level of the nmethod but
+ // that currently isn't properly recorded.
+ if (code == NULL ||
+ (TieredCompilation && code->compiler() != NULL && code->compiler()->is_c1())) {
+ return 0;
+ }
+ return code->code_size();
+ )
+}
+
+// ------------------------------------------------------------------
+// ciMethod::log_nmethod_identity
+void ciMethod::log_nmethod_identity(xmlStream* log) {
+ GUARDED_VM_ENTRY(
+ nmethod* code = get_methodOop()->code();
+ if (code != NULL) {
+ code->log_identity(log);
+ }
+ )
+}
+
+// ------------------------------------------------------------------
+// ciMethod::is_not_reached
+bool ciMethod::is_not_reached(int bci) {
+ check_is_loaded();
+ VM_ENTRY_MARK;
+ return Interpreter::is_not_reached(
+ methodHandle(THREAD, get_methodOop()), bci);
+}
+
+// ------------------------------------------------------------------
+// ciMethod::was_never_executed
+bool ciMethod::was_executed_more_than(int times) {
+ VM_ENTRY_MARK;
+ return get_methodOop()->was_executed_more_than(times);
+}
+
+// ------------------------------------------------------------------
+// ciMethod::has_unloaded_classes_in_signature
+bool ciMethod::has_unloaded_classes_in_signature() {
+ VM_ENTRY_MARK;
+ {
+ EXCEPTION_MARK;
+ methodHandle m(THREAD, get_methodOop());
+ bool has_unloaded = methodOopDesc::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
+ if( HAS_PENDING_EXCEPTION ) {
+ CLEAR_PENDING_EXCEPTION;
+ return true; // Declare that we may have unloaded classes
+ }
+ return has_unloaded;
+ }
+}
+
+// ------------------------------------------------------------------
+// ciMethod::is_klass_loaded
+bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
+ VM_ENTRY_MARK;
+ return get_methodOop()->is_klass_loaded(refinfo_index, must_be_resolved);
+}
+
+// ------------------------------------------------------------------
+// ciMethod::check_call
+bool ciMethod::check_call(int refinfo_index, bool is_static) const {
+ VM_ENTRY_MARK;
+ {
+ EXCEPTION_MARK;
+ HandleMark hm(THREAD);
+ constantPoolHandle pool (THREAD, get_methodOop()->constants());
+ methodHandle spec_method;
+ KlassHandle spec_klass;
+ LinkResolver::resolve_method(spec_method, spec_klass, pool, refinfo_index, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION;
+ return false;
+ } else {
+ return (spec_method->is_static() == is_static);
+ }
+ }
+ return false;
+}
+
+// ------------------------------------------------------------------
+// ciMethod::print_codes
+//
+// Print the bytecodes for this method.
+void ciMethod::print_codes_on(outputStream* st) {
+ check_is_loaded();
+ GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(st);)
+}
+
+
+#define FETCH_FLAG_FROM_VM(flag_accessor) { \
+ check_is_loaded(); \
+ VM_ENTRY_MARK; \
+ return get_methodOop()->flag_accessor(); \
+}
+
+bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
+bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
+bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
+bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
+bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
+bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
+
+BCEscapeAnalyzer *ciMethod::get_bcea() {
+ if (_bcea == NULL) {
+ _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
+ }
+ return _bcea;
+}
+
+ciMethodBlocks *ciMethod::get_method_blocks() {
+ Arena *arena = CURRENT_ENV->arena();
+ if (_method_blocks == NULL) {
+ _method_blocks = new (arena) ciMethodBlocks(arena, this);
+ }
+ return _method_blocks;
+}
+
+#undef FETCH_FLAG_FROM_VM
+
+
+// ------------------------------------------------------------------
+// ciMethod::print_codes
+//
+// Print a range of the bytecodes for this method.
+void ciMethod::print_codes_on(int from, int to, outputStream* st) {
+ check_is_loaded();
+ GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(from, to, st);)
+}
+
+// ------------------------------------------------------------------
+// ciMethod::print_name
+//
+// Print the name of this method, including signature and some flags.
+void ciMethod::print_name(outputStream* st) {
+ check_is_loaded();
+ GUARDED_VM_ENTRY(get_methodOop()->print_name(st);)
+}
+
+// ------------------------------------------------------------------
+// ciMethod::print_short_name
+//
+// Print the name of this method, without signature.
+void ciMethod::print_short_name(outputStream* st) {
+ check_is_loaded();
+ GUARDED_VM_ENTRY(get_methodOop()->print_short_name(st);)
+}
+
+// ------------------------------------------------------------------
+// ciMethod::print_impl
+//
+// Implementation of the print method.
+void ciMethod::print_impl(outputStream* st) {
+ ciObject::print_impl(st);
+ st->print(" name=");
+ name()->print_symbol_on(st);
+ st->print(" holder=");
+ holder()->print_name_on(st);
+ st->print(" signature=");
+ signature()->as_symbol()->print_symbol_on(st);
+ if (is_loaded()) {
+ st->print(" loaded=true flags=");
+ flags().print_member_flags(st);
+ } else {
+ st->print(" loaded=false");
+ }
+}