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5cd3519571
The implementation is not doing anything just yet. This will be done in a followup bug. --HG-- extra : rebase_source : e301eac77c6bd8247c09d369074ecb8d7b5a1a2f
145 lines
5.3 KiB
C
145 lines
5.3 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Helper header to declare all the supported malloc functions.
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* MALLOC_DECL arguments are:
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* - function name
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* - return type
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* - argument types
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*/
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#ifndef malloc_decls_h
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# define malloc_decls_h
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# include "mozjemalloc_types.h"
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# define MALLOC_FUNCS_MALLOC_BASE 1
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# define MALLOC_FUNCS_MALLOC_EXTRA 2
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# define MALLOC_FUNCS_MALLOC (MALLOC_FUNCS_MALLOC_BASE | \
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MALLOC_FUNCS_MALLOC_EXTRA)
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# define MALLOC_FUNCS_JEMALLOC 4
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# define MALLOC_FUNCS_INIT 8
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# define MALLOC_FUNCS_BRIDGE 16
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# define MALLOC_FUNCS_ARENA_BASE 32
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# define MALLOC_FUNCS_ARENA_ALLOC 64
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# define MALLOC_FUNCS_ARENA (MALLOC_FUNCS_ARENA_BASE | \
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MALLOC_FUNCS_ARENA_ALLOC)
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# define MALLOC_FUNCS_ALL (MALLOC_FUNCS_INIT | MALLOC_FUNCS_BRIDGE | \
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MALLOC_FUNCS_MALLOC | MALLOC_FUNCS_JEMALLOC | \
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MALLOC_FUNCS_ARENA)
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#endif /* malloc_decls_h */
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#ifndef MALLOC_FUNCS
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# define MALLOC_FUNCS (MALLOC_FUNCS_MALLOC | MALLOC_FUNCS_JEMALLOC | \
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MALLOC_FUNCS_ARENA)
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#endif
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#ifdef MALLOC_DECL
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# if MALLOC_FUNCS & MALLOC_FUNCS_INIT
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MALLOC_DECL(init, void, const malloc_table_t *)
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# endif
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# if MALLOC_FUNCS & MALLOC_FUNCS_BRIDGE
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MALLOC_DECL(get_bridge, struct ReplaceMallocBridge*)
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# endif
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# if MALLOC_FUNCS & MALLOC_FUNCS_MALLOC_BASE
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MALLOC_DECL(malloc, void *, size_t)
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MALLOC_DECL(calloc, void *, size_t, size_t)
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MALLOC_DECL(realloc, void *, void *, size_t)
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MALLOC_DECL(free, void, void *)
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MALLOC_DECL(memalign, void *, size_t, size_t)
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# endif
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# if MALLOC_FUNCS & MALLOC_FUNCS_MALLOC_EXTRA
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MALLOC_DECL(posix_memalign, int, void **, size_t, size_t)
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MALLOC_DECL(aligned_alloc, void *, size_t, size_t)
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MALLOC_DECL(valloc, void *, size_t)
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MALLOC_DECL(malloc_usable_size, size_t, usable_ptr_t)
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MALLOC_DECL(malloc_good_size, size_t, size_t)
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# endif
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# if MALLOC_FUNCS & MALLOC_FUNCS_JEMALLOC
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MALLOC_DECL(jemalloc_stats, void, jemalloc_stats_t *)
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/*
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* On some operating systems (Mac), we use madvise(MADV_FREE) to hand pages
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* back to the operating system. On Mac, the operating system doesn't take
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* this memory back immediately; instead, the OS takes it back only when the
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* machine is running out of physical memory.
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*
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* This is great from the standpoint of efficiency, but it makes measuring our
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* actual RSS difficult, because pages which we've MADV_FREE'd shouldn't count
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* against our RSS.
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*
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* This function explicitly purges any MADV_FREE'd pages from physical memory,
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* causing our reported RSS match the amount of memory we're actually using.
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*
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* Note that this call is expensive in two ways. First, it may be slow to
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* execute, because it may make a number of slow syscalls to free memory. This
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* function holds the big jemalloc locks, so basically all threads are blocked
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* while this function runs.
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*
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* This function is also expensive in that the next time we go to access a page
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* which we've just explicitly decommitted, the operating system has to attach
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* to it a physical page! If we hadn't run this function, the OS would have
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* less work to do.
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*
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* If MALLOC_DOUBLE_PURGE is not defined, this function does nothing.
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*/
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MALLOC_DECL(jemalloc_purge_freed_pages, void)
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/*
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* Free all unused dirty pages in all arenas. Calling this function will slow
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* down subsequent allocations so it is recommended to use it only when
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* memory needs to be reclaimed at all costs (see bug 805855). This function
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* provides functionality similar to mallctl("arenas.purge") in jemalloc 3.
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*/
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MALLOC_DECL(jemalloc_free_dirty_pages, void)
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/*
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* Opt in or out of a thread local arena (bool argument is whether to opt-in
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* (true) or out (false)).
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*/
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MALLOC_DECL(jemalloc_thread_local_arena, void, bool)
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/*
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* Provide information about any allocation enclosing the given address.
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*/
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MALLOC_DECL(jemalloc_ptr_info, void, const void*, jemalloc_ptr_info_t*)
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# endif
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# if MALLOC_FUNCS & MALLOC_FUNCS_ARENA_BASE
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/*
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* Creates a separate arena, and returns its id, valid to use with moz_arena_*
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* functions.
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*/
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MALLOC_DECL(moz_create_arena, arena_id_t)
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/*
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* Dispose of the given arena. Subsequent uses of the arena will fail.
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*/
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MALLOC_DECL(moz_dispose_arena, void, arena_id_t)
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# endif
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# if MALLOC_FUNCS & MALLOC_FUNCS_ARENA_ALLOC
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/*
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* Same as the functions without the moz_arena_ prefix, but using arenas
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* created with moz_create_arena.
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* The contract, even if not enforced at runtime in some configurations,
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* is that moz_arena_realloc and moz_arena_free will crash if the wrong
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* arena id is given. All functions will crash if the arena id is invalid.
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* Although discouraged, plain realloc and free can still be used on
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* pointers allocated with these functions. Realloc will properly keep
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* new pointers in the same arena as the original.
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*/
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MALLOC_DECL(moz_arena_malloc, void*, arena_id_t, size_t)
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MALLOC_DECL(moz_arena_calloc, void*, arena_id_t, size_t, size_t)
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MALLOC_DECL(moz_arena_realloc, void*, arena_id_t, void*, size_t)
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MALLOC_DECL(moz_arena_free, void, arena_id_t, void*)
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MALLOC_DECL(moz_arena_memalign, void*, arena_id_t, size_t, size_t)
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# endif
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#endif /* MALLOC_DECL */
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#undef MALLOC_DECL
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#undef MALLOC_FUNCS
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