d27f29b468
Refactor arena and extent locking protocols such that arena and
extent locks are never held when calling into the extent_*_wrapper()
API. This requires extra care during purging since the arena lock no
longer protects the inner purging logic. It also requires extra care to
protect extents from being merged with adjacent extents.
Convert extent_t's 'active' flag to an enumerated 'state', so that
retained extents are explicitly marked as such, rather than depending on
ring linkage state.
Refactor the extent collections (and their synchronization) for cached
and retained extents into extents_t. Incorporate LRU functionality to
support purging. Incorporate page count accounting, which replaces
arena->ndirty and arena->stats.retained.
Assert that no core locks are held when entering any internal
[de]allocation functions. This is in addition to existing assertions
that no locks are held when entering external [de]allocation functions.
Audit and document synchronization protocols for all arena_t fields.
This fixes a potential deadlock due to recursive allocation during
gdump, in a similar fashion to b49c649bc1
(Fix lock order reversal during gdump.), but with a necessarily much
broader code impact.
29 lines
1.3 KiB
C
29 lines
1.3 KiB
C
#ifndef JEMALLOC_INTERNAL_LARGE_EXTERNS_H
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#define JEMALLOC_INTERNAL_LARGE_EXTERNS_H
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void *large_malloc(tsdn_t *tsdn, arena_t *arena, size_t usize, bool zero);
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void *large_palloc(tsdn_t *tsdn, arena_t *arena, size_t usize,
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size_t alignment, bool zero);
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bool large_ralloc_no_move(tsdn_t *tsdn, extent_t *extent, size_t usize_min,
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size_t usize_max, bool zero);
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void *large_ralloc(tsdn_t *tsdn, arena_t *arena, extent_t *extent,
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size_t usize, size_t alignment, bool zero, tcache_t *tcache);
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#ifdef JEMALLOC_JET
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typedef void (large_dalloc_junk_t)(void *, size_t);
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extern large_dalloc_junk_t *large_dalloc_junk;
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typedef void (large_dalloc_maybe_junk_t)(void *, size_t);
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extern large_dalloc_maybe_junk_t *large_dalloc_maybe_junk;
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#else
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void large_dalloc_junk(void *ptr, size_t usize);
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void large_dalloc_maybe_junk(void *ptr, size_t usize);
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#endif
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void large_dalloc_prep_junked_locked(tsdn_t *tsdn, extent_t *extent);
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void large_dalloc_finish(tsdn_t *tsdn, extent_t *extent);
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void large_dalloc(tsdn_t *tsdn, extent_t *extent);
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size_t large_salloc(tsdn_t *tsdn, const extent_t *extent);
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prof_tctx_t *large_prof_tctx_get(tsdn_t *tsdn, const extent_t *extent);
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void large_prof_tctx_set(tsdn_t *tsdn, extent_t *extent, prof_tctx_t *tctx);
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void large_prof_tctx_reset(tsdn_t *tsdn, extent_t *extent);
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#endif /* JEMALLOC_INTERNAL_LARGE_EXTERNS_H */
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