1 /*
2 * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
455
456 assert(_bottom != NULL, "Must never be empty");
457 _bottom->inc_refcount();
458 return _bottom->get_for(comp);
459 }
460
461 void DirectivesStack::push(CompilerDirectives* directive) {
462 MutexLockerEx locker(DirectivesStack_lock, Mutex::_no_safepoint_check_flag);
463
464 directive->inc_refcount();
465 if (_top == NULL) {
466 assert(_bottom == NULL, "There can only be one default directive");
467 _bottom = directive; // default directive, can never be removed.
468 }
469
470 directive->set_next(_top);
471 _top = directive;
472 _depth++;
473 }
474
475 void DirectivesStack::pop() {
476 MutexLockerEx locker(DirectivesStack_lock, Mutex::_no_safepoint_check_flag);
477 pop_inner();
478 }
479
480 void DirectivesStack::pop_inner() {
481 assert(DirectivesStack_lock->owned_by_self(), "");
482
483 if (_top->next() == NULL) {
484 return; // Do nothing - don't allow an empty stack
485 }
486 CompilerDirectives* tmp = _top;
487 _top = _top->next();
488 _depth--;
489
490 DirectivesStack::release(tmp);
491 }
492
493 bool DirectivesStack::check_capacity(int request_size, outputStream* st) {
494 if ((request_size + _depth) > CompilerDirectivesLimit) {
495 st->print_cr("Could not add %i more directives. Currently %i/%i directives.", request_size, _depth, CompilerDirectivesLimit);
496 return false;
497 }
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1 /*
2 * Copyright (c) 1998, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
455
456 assert(_bottom != NULL, "Must never be empty");
457 _bottom->inc_refcount();
458 return _bottom->get_for(comp);
459 }
460
461 void DirectivesStack::push(CompilerDirectives* directive) {
462 MutexLockerEx locker(DirectivesStack_lock, Mutex::_no_safepoint_check_flag);
463
464 directive->inc_refcount();
465 if (_top == NULL) {
466 assert(_bottom == NULL, "There can only be one default directive");
467 _bottom = directive; // default directive, can never be removed.
468 }
469
470 directive->set_next(_top);
471 _top = directive;
472 _depth++;
473 }
474
475 void DirectivesStack::pop(int count) {
476 MutexLockerEx locker(DirectivesStack_lock, Mutex::_no_safepoint_check_flag);
477 assert(count > -1, "No negative values");
478 for (int i = 0; i < count; i++) {
479 pop_inner();
480 }
481 }
482
483 void DirectivesStack::pop_inner() {
484 assert(DirectivesStack_lock->owned_by_self(), "");
485
486 if (_top->next() == NULL) {
487 return; // Do nothing - don't allow an empty stack
488 }
489 CompilerDirectives* tmp = _top;
490 _top = _top->next();
491 _depth--;
492
493 DirectivesStack::release(tmp);
494 }
495
496 bool DirectivesStack::check_capacity(int request_size, outputStream* st) {
497 if ((request_size + _depth) > CompilerDirectivesLimit) {
498 st->print_cr("Could not add %i more directives. Currently %i/%i directives.", request_size, _depth, CompilerDirectivesLimit);
499 return false;
500 }
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