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https://github.com/jemalloc/jemalloc.git
synced 2026-10-28 16:55:15 +08:00
Tony Printezis
e36a0fa5bc
Due to an incorrect condition, a prof-promoted small allocation was incorrectly wrapped in large-extent guard pages. This consumed the large-guard budget, so the next genuinely large allocation that should have been guarded got skipped.
30 lines
883 B
C
30 lines
883 B
C
#include "test/jemalloc_test.h"
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#include "test/san.h"
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#include "jemalloc/internal/prof_inlines.h"
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TEST_BEGIN(test_prof_sampled_small_is_not_guarded_as_large) {
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test_skip_if(!config_prof);
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tsd_t *tsd = tsd_fetch();
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void *small = malloc(PAGE / 2);
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expect_ptr_not_null(small, "Unexpected small allocation failure");
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expect_true(prof_sampled(tsd, small),
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"Expected every allocation to be prof sampled");
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expect_false(extent_is_guarded(tsd_tsdn(tsd), small),
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"A prof-promoted small allocation is not a large extent");
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free(small);
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void *large = malloc(SC_LARGE_MINCLASS);
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expect_ptr_not_null(large, "Unexpected large allocation failure");
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expect_true(extent_is_guarded(tsd_tsdn(tsd), large),
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"The next eligible large extent should still be guarded");
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free(large);
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}
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TEST_END
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int
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main(void) {
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return test(test_prof_sampled_small_is_not_guarded_as_large);
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}
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