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Implement guard pages.

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Adding guarded extents, which are regular extents surrounded by guard pages
(mprotected).  To reduce syscalls, small guarded extents are cached as a
separate eset in ecache, and decay through the dirty / muzzy / retained pipeline
as usual.
This commit is contained in:
Qi Wang 2021-04-26 14:22:25 -07:00 • committed by Qi Wang
parent 7bb05e04be
commit deb8e62a83
41 changed files with 920 additions and 251 deletions
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4
test/unit/hpa_background_thread.c
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@ -128,6 +128,8 @@ TEST_BEGIN(test_hpa_background_thread_purges) {
test_skip_if(!config_stats);
test_skip_if(!hpa_supported());
test_skip_if(!have_background_thread);
/* Skip since guarded pages cannot be allocated from hpa. */
test_skip_if(san_enabled());
unsigned arena_ind = create_arena();
/*
@ -142,6 +144,8 @@ TEST_BEGIN(test_hpa_background_thread_enable_disable) {
test_skip_if(!config_stats);
test_skip_if(!hpa_supported());
test_skip_if(!have_background_thread);
/* Skip since guarded pages cannot be allocated from hpa. */
test_skip_if(san_enabled());
unsigned arena_ind = create_arena();