41e0b857be
Header files are now self-contained, which makes the relationships between the files clearer, and crucially allows LSP tools like `clangd` to function correctly in all of our header files. I have verified that the headers are self-contained (aside from the various Windows shims) by compiling them as if they were C files – in a follow-up commit I plan to add this to CI to ensure we don't regress on this front.
55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
#ifndef JEMALLOC_INTERNAL_SAN_BUMP_H
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#define JEMALLOC_INTERNAL_SAN_BUMP_H
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#include "jemalloc/internal/jemalloc_preamble.h"
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#include "jemalloc/internal/edata.h"
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#include "jemalloc/internal/exp_grow.h"
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#include "jemalloc/internal/mutex.h"
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#include "jemalloc/internal/witness.h"
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#define SBA_RETAINED_ALLOC_SIZE ((size_t)4 << 20)
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extern bool opt_retain;
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typedef struct ehooks_s ehooks_t;
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typedef struct pac_s pac_t;
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typedef struct san_bump_alloc_s san_bump_alloc_t;
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struct san_bump_alloc_s {
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malloc_mutex_t mtx;
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edata_t *curr_reg;
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};
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static inline bool
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san_bump_enabled(void) {
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/*
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* We enable san_bump allocator only when it's possible to break up a
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* mapping and unmap a part of it (maps_coalesce). This is needed to
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* ensure the arena destruction process can destroy all retained guarded
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* extents one by one and to unmap a trailing part of a retained guarded
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* region when it's too small to fit a pending allocation.
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* opt_retain is required, because this allocator retains a large
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* virtual memory mapping and returns smaller parts of it.
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*/
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return maps_coalesce && opt_retain;
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}
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static inline bool
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san_bump_alloc_init(san_bump_alloc_t* sba) {
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bool err = malloc_mutex_init(&sba->mtx, "sanitizer_bump_allocator",
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WITNESS_RANK_SAN_BUMP_ALLOC, malloc_mutex_rank_exclusive);
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if (err) {
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return true;
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}
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sba->curr_reg = NULL;
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return false;
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}
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edata_t *
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san_bump_alloc(tsdn_t *tsdn, san_bump_alloc_t* sba, pac_t *pac, ehooks_t *ehooks,
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size_t size, bool zero);
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#endif /* JEMALLOC_INTERNAL_SAN_BUMP_H */
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