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135 lines
5.4 KiB
C
135 lines
5.4 KiB
C
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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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#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 \
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(MALLOC_FUNCS_MALLOC_BASE | 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 | MALLOC_FUNCS_ARENA_ALLOC)
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#define MALLOC_FUNCS_ALL \
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(MALLOC_FUNCS_INIT | MALLOC_FUNCS_BRIDGE | MALLOC_FUNCS_MALLOC | \
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MALLOC_FUNCS_JEMALLOC | 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 \
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(MALLOC_FUNCS_MALLOC | MALLOC_FUNCS_JEMALLOC | 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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// 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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MALLOC_DECL(jemalloc_purge_freed_pages, void)
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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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MALLOC_DECL(jemalloc_free_dirty_pages, void)
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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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MALLOC_DECL(jemalloc_thread_local_arena, void, bool)
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// Provide information about any allocation enclosing the given address.
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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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// Creates a separate arena, and returns its id, valid to use with moz_arena_*
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// functions.
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MALLOC_DECL(moz_create_arena, arena_id_t)
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// Dispose of the given arena. Subsequent uses of the arena will crash.
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// Passing an invalid id (inexistent or already disposed) to this function
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// will crash.
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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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// 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 given
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// arena doesn't own the given pointer. All functions will crash if the
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// 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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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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