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comparison src/share/vm/gc_implementation/parallelScavenge/psMarkSweepDecorator.cpp @ 10287:12f651e29f6b

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6843347: Boundary values in some public GC options cause crashes Summary: Setting some public integer options to specific values causes crashes or undefined GC behavior. This patchset adds the necessary argument checking for these options. Reviewed-by: jmasa, brutisso
author tschatzl
date Wed, 15 May 2013 11:05:09 +0200
parents b735136e0d82
children de6a9e811145
comparison
equal deleted inserted replaced
10286:0a2986f36965 10287:12f651e29f6b
86 * we don't start compacting before there is a significant gain to be made. 86 * we don't start compacting before there is a significant gain to be made.
87 * Occasionally, we want to ensure a full compaction, which is determined 87 * Occasionally, we want to ensure a full compaction, which is determined
88 * by the MarkSweepAlwaysCompactCount parameter. This is a significant 88 * by the MarkSweepAlwaysCompactCount parameter. This is a significant
89 * performance improvement! 89 * performance improvement!
90 */ 90 */
91 bool skip_dead = (MarkSweepAlwaysCompactCount < 1) 91 bool skip_dead = ((PSMarkSweep::total_invocations() % MarkSweepAlwaysCompactCount) != 0);
92 || ((PSMarkSweep::total_invocations() % MarkSweepAlwaysCompactCount) != 0);
93 92
94 size_t allowed_deadspace = 0; 93 size_t allowed_deadspace = 0;
95 if (skip_dead) { 94 if (skip_dead) {
96 const size_t ratio = allowed_dead_ratio(); 95 const size_t ratio = allowed_dead_ratio();
97 allowed_deadspace = space()->capacity_in_words() * ratio / 100; 96 allowed_deadspace = space()->capacity_in_words() * ratio / 100;