1 /*
2 * Copyright (c) 2008, 2017, 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 *
483 return false;
484 }
485 if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) {
486 return false;
487 }
488 if (fp() + interpreter_frame_initial_sp_offset < sp()) {
489 return false;
490 }
491 // These are hacks to keep us out of trouble.
492 // The problem with these is that they mask other problems
493 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above
494 return false;
495 }
496 // do some validation of frame elements
497
498 // first the method
499
500 Method* m = *interpreter_frame_method_addr();
501
502 // validate the method we'd find in this potential sender
503 if (!m->is_valid_method()) return false;
504
505 // stack frames shouldn't be much larger than max_stack elements
506
507 if (fp() - sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) {
508 return false;
509 }
510
511 // validate bci/bcp
512
513 address bcp = interpreter_frame_bcp();
514 if (m->validate_bci_from_bcp(bcp) < 0) {
515 return false;
516 }
517
518 // validate ConstantPoolCache*
519 ConstantPoolCache* cp = *interpreter_frame_cache_addr();
520 if (cp == NULL || !cp->is_metaspace_object()) return false;
521
522 // validate locals
523
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1 /*
2 * Copyright (c) 2008, 2018, 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 *
483 return false;
484 }
485 if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) {
486 return false;
487 }
488 if (fp() + interpreter_frame_initial_sp_offset < sp()) {
489 return false;
490 }
491 // These are hacks to keep us out of trouble.
492 // The problem with these is that they mask other problems
493 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above
494 return false;
495 }
496 // do some validation of frame elements
497
498 // first the method
499
500 Method* m = *interpreter_frame_method_addr();
501
502 // validate the method we'd find in this potential sender
503 if (!Method::is_valid_method(m)) return false;
504
505 // stack frames shouldn't be much larger than max_stack elements
506
507 if (fp() - sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) {
508 return false;
509 }
510
511 // validate bci/bcp
512
513 address bcp = interpreter_frame_bcp();
514 if (m->validate_bci_from_bcp(bcp) < 0) {
515 return false;
516 }
517
518 // validate ConstantPoolCache*
519 ConstantPoolCache* cp = *interpreter_frame_cache_addr();
520 if (cp == NULL || !cp->is_metaspace_object()) return false;
521
522 // validate locals
523
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