/* * 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. *
*/
staticvoid generate_random_map(G1CommittedRegionMap* map) { for (uint i = 0; i < G1CommittedRegionMapSerial::TestRegions; i++) { if (mutate()) {
map->activate(i, i+1);
}
}
if (map->num_active() == 0) { // If we randomly activated 0 regions, activate the first half // to have some regions to test.
map->activate(0, G1CommittedRegionMapSerial::TestRegions / 2);
}
}
staticvoid random_deactivate(G1CommittedRegionMap* map) {
uint current_offset = 0; do {
HeapRegionRange current = map->next_active_range(current_offset); if (mutate()) { if (current.length() < 5) { // For short ranges, deactivate whole.
map->deactivate(current.start(), current.end());
} else { // For larger ranges, deactivate half.
map->deactivate(current.start(), current.end() - (current.length() / 2));
}
}
current_offset = current.end();
} while (current_offset != G1CommittedRegionMapSerial::TestRegions);
}
staticvoid random_uncommit_or_reactive(G1CommittedRegionMap* map) {
uint current_offset = 0; do {
HeapRegionRange current = map->next_inactive_range(current_offset); // Randomly either reactivate or uncommit if (mutate()) {
map->reactivate(current.start(), current.end());
} else {
map->uncommit(current.start(), current.end());
}
current_offset = current.end();
} while (current_offset != G1CommittedRegionMapSerial::TestRegions);
}
staticvoid random_activate_free(G1CommittedRegionMap* map) {
uint current_offset = 0; do {
HeapRegionRange current = map->next_committable_range(current_offset); // Randomly either reactivate or uncommit if (mutate()) { if (current.length() < 5) { // For short ranges, deactivate whole.
map->activate(current.start(), current.end());
} else { // For larger ranges, deactivate half.
map->activate(current.start(), current.end() - (current.length() / 2));
}
}
current_offset = current.end();
} while (current_offset != G1CommittedRegionMapSerial::TestRegions);
}
// Activate some regions
generate_random_map(&serial_map);
// Work through the map and mutate it for (int i = 0; i < 500; i++) {
random_deactivate(&serial_map);
serial_map.verify_counts();
random_uncommit_or_reactive(&serial_map);
serial_map.verify_counts();
random_activate_free(&serial_map);
serial_map.verify_counts();
ASSERT_EQ(serial_map.num_inactive(), 0u);
}
}
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