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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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16
test/unit/hpa.c
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@@ -80,11 +80,11 @@ TEST_BEGIN(test_alloc_max) {
/* Small max */
bool deferred_work_generated;
edata = pai_alloc(tsdn, &shard->pai, ALLOC_MAX, PAGE, false,
edata = pai_alloc(tsdn, &shard->pai, ALLOC_MAX, PAGE, false, false,
&deferred_work_generated);
expect_ptr_not_null(edata, "Allocation of small max failed");
edata = pai_alloc(tsdn, &shard->pai, ALLOC_MAX + PAGE, PAGE, false,
&deferred_work_generated);
false, &deferred_work_generated);
expect_ptr_null(edata, "Allocation of larger than small max succeeded");
destroy_test_data(shard);
@@ -188,7 +188,7 @@ TEST_BEGIN(test_stress) {
size_t npages = npages_min + prng_range_zu(&prng_state,
npages_max - npages_min);
edata_t *edata = pai_alloc(tsdn, &shard->pai,
npages * PAGE, PAGE, false,
npages * PAGE, PAGE, false, false,
&deferred_work_generated);
assert_ptr_not_null(edata,
"Unexpected allocation failure");
@@ -263,7 +263,8 @@ TEST_BEGIN(test_alloc_dalloc_batch) {
*/
for (size_t i = 0; i < NALLOCS / 2; i++) {
allocs[i] = pai_alloc(tsdn, &shard->pai, PAGE, PAGE,
/* zero */ false, &deferred_work_generated);
/* zero */ false, /* guarded */ false,
&deferred_work_generated);
expect_ptr_not_null(allocs[i], "Unexpected alloc failure");
}
edata_list_active_t allocs_list;
@@ -299,7 +300,8 @@ TEST_BEGIN(test_alloc_dalloc_batch) {
/* Reallocate (individually), and ensure reuse and contiguity. */
for (size_t i = 0; i < NALLOCS; i++) {
allocs[i] = pai_alloc(tsdn, &shard->pai, PAGE, PAGE,
/* zero */ false, &deferred_work_generated);
/* zero */ false, /* guarded */ false,
&deferred_work_generated);
expect_ptr_not_null(allocs[i], "Unexpected alloc failure.");
}
void *new_base = edata_base_get(allocs[0]);
@@ -374,7 +376,7 @@ TEST_BEGIN(test_defer_time) {
edata_t *edatas[HUGEPAGE_PAGES];
for (int i = 0; i < (int)HUGEPAGE_PAGES; i++) {
edatas[i] = pai_alloc(tsdn, &shard->pai, PAGE, PAGE, false,
&deferred_work_generated);
false, &deferred_work_generated);
expect_ptr_not_null(edatas[i], "Unexpected null edata");
}
hpa_shard_do_deferred_work(tsdn, shard);
@@ -408,7 +410,7 @@ TEST_BEGIN(test_defer_time) {
*/
for (int i = 0; i < (int)HUGEPAGE_PAGES / 2; i++) {
edatas[i] = pai_alloc(tsdn, &shard->pai, PAGE, PAGE, false,
&deferred_work_generated);
false, &deferred_work_generated);
expect_ptr_not_null(edatas[i], "Unexpected null edata");
}
/*