/* * Copyright (c) 2020, 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. *
*/
// Make up a stack range. No need to allocate anything. Size has to be large enough // to fit sum of all zones into them.
address base = (address) 0x40000000; const size_t size = os::vm_page_size() * 100;
address end = base - size;
so.initialize(base, end);
// Walking down the "stack" check for consistency of the three "in_stack_xxx" functions enum { normal_stack, reserved_or_yellow_zone, red_zone } where = normal_stack; for (address p = base - 1; p >= end; p -= os::vm_page_size()) { // tty->print_cr(PTR_FORMAT " %d %d %d", p2i(p), // (int)so.in_stack_reserved_zone(p), // (int)so.in_stack_yellow_reserved_zone(p), // (int)so.in_stack_red_zone(p)); switch (where) { case normal_stack:
ASSERT_FALSE(so.in_stack_red_zone(p)); if (so.in_stack_yellow_reserved_zone(p)) { if (StackReservedPages > 0) {
ASSERT_TRUE(so.in_stack_reserved_zone(p));
} else {
ASSERT_FALSE(so.in_stack_reserved_zone(p));
}
where = reserved_or_yellow_zone;
} else {
ASSERT_FALSE(so.in_stack_reserved_zone((p)));
} break; case reserved_or_yellow_zone: if (so.in_stack_red_zone(p)) {
ASSERT_FALSE(so.in_stack_yellow_reserved_zone(p));
where = red_zone;
} else {
ASSERT_TRUE(so.in_stack_yellow_reserved_zone(p));
} break; case red_zone:
ASSERT_TRUE(so.in_stack_red_zone(p));
ASSERT_FALSE(so.in_stack_yellow_reserved_zone(p));
ASSERT_FALSE(so.in_stack_reserved_zone((p))); break;
}
}
ASSERT_EQ(where, red_zone);
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