From 43a97878ce14b72f0981164f87f2e35e14151312 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 11:22:09 +0200 Subject: Adding upstream version 110.0.1. Signed-off-by: Daniel Baumann --- memory/build/malloc_decls.h | 147 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 147 insertions(+) create mode 100644 memory/build/malloc_decls.h (limited to 'memory/build/malloc_decls.h') diff --git a/memory/build/malloc_decls.h b/memory/build/malloc_decls.h new file mode 100644 index 0000000000..49a7437afc --- /dev/null +++ b/memory/build/malloc_decls.h @@ -0,0 +1,147 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// Helper header to declare all the supported malloc functions. +// MALLOC_DECL arguments are: +// - function name +// - return type +// - argument types + +#ifndef malloc_decls_h +# define malloc_decls_h + +# include "mozjemalloc_types.h" + +# define MALLOC_FUNCS_MALLOC_BASE 1 +# define MALLOC_FUNCS_MALLOC_EXTRA 2 +# define MALLOC_FUNCS_MALLOC \ + (MALLOC_FUNCS_MALLOC_BASE | MALLOC_FUNCS_MALLOC_EXTRA) +# define MALLOC_FUNCS_JEMALLOC 4 +# define MALLOC_FUNCS_ARENA_BASE 8 +# define MALLOC_FUNCS_ARENA_ALLOC 16 +# define MALLOC_FUNCS_ARENA \ + (MALLOC_FUNCS_ARENA_BASE | MALLOC_FUNCS_ARENA_ALLOC) +# define MALLOC_FUNCS_ALL \ + (MALLOC_FUNCS_MALLOC | MALLOC_FUNCS_JEMALLOC | MALLOC_FUNCS_ARENA) + +#endif // malloc_decls_h + +#ifndef MALLOC_FUNCS +# define MALLOC_FUNCS MALLOC_FUNCS_ALL +#endif + +#ifdef MALLOC_DECL +// NOTHROW_MALLOC_DECL is intended for functions where the standard library +// declares the functions in question as `throw()`. Not all platforms +// consistent declare certain functions as `throw()`, though. + +// Bionic and OS X don't seem to care about `throw()`ness. +# if defined(ANDROID) || defined(XP_DARWIN) +# undef NOTHROW_MALLOC_DECL +# define NOTHROW_MALLOC_DECL MALLOC_DECL +// Some places don't care about the distinction. +# elif !defined(NOTHROW_MALLOC_DECL) +# define NOTHROW_MALLOC_DECL MALLOC_DECL +# endif + +# if MALLOC_FUNCS & MALLOC_FUNCS_MALLOC_BASE +MALLOC_DECL(malloc, void*, size_t) +MALLOC_DECL(calloc, void*, size_t, size_t) +MALLOC_DECL(realloc, void*, void*, size_t) +NOTHROW_MALLOC_DECL(free, void, void*) +NOTHROW_MALLOC_DECL(memalign, void*, size_t, size_t) +# endif +# if MALLOC_FUNCS & MALLOC_FUNCS_MALLOC_EXTRA +NOTHROW_MALLOC_DECL(posix_memalign, int, void**, size_t, size_t) +NOTHROW_MALLOC_DECL(aligned_alloc, void*, size_t, size_t) +NOTHROW_MALLOC_DECL(valloc, void*, size_t) +NOTHROW_MALLOC_DECL(malloc_usable_size, size_t, usable_ptr_t) +MALLOC_DECL(malloc_good_size, size_t, size_t) +# endif + +# if MALLOC_FUNCS & MALLOC_FUNCS_JEMALLOC +// The 2nd argument points to an optional array exactly +// jemalloc_stats_num_bins() long to be filled in (if non-null). +MALLOC_DECL(jemalloc_stats_internal, void, jemalloc_stats_t*, + jemalloc_bin_stats_t*) + +// Return the size of the jemalloc_bin_stats_t array. +MALLOC_DECL(jemalloc_stats_num_bins, size_t) + +// On some operating systems (Mac), we use madvise(MADV_FREE) to hand pages +// back to the operating system. On Mac, the operating system doesn't take +// this memory back immediately; instead, the OS takes it back only when the +// machine is running out of physical memory. +// +// This is great from the standpoint of efficiency, but it makes measuring our +// actual RSS difficult, because pages which we've MADV_FREE'd shouldn't count +// against our RSS. +// +// This function explicitly purges any MADV_FREE'd pages from physical memory, +// causing our reported RSS match the amount of memory we're actually using. +// +// Note that this call is expensive in two ways. First, it may be slow to +// execute, because it may make a number of slow syscalls to free memory. This +// function holds the big jemalloc locks, so basically all threads are blocked +// while this function runs. +// +// This function is also expensive in that the next time we go to access a page +// which we've just explicitly decommitted, the operating system has to attach +// to it a physical page! If we hadn't run this function, the OS would have +// less work to do. +// +// If MALLOC_DOUBLE_PURGE is not defined, this function does nothing. +MALLOC_DECL(jemalloc_purge_freed_pages, void) + +// Free all unused dirty pages in all arenas. Calling this function will slow +// down subsequent allocations so it is recommended to use it only when +// memory needs to be reclaimed at all costs (see bug 805855). This function +// provides functionality similar to mallctl("arenas.purge") in jemalloc 3. +MALLOC_DECL(jemalloc_free_dirty_pages, void) + +// Opt in or out of a thread local arena (bool argument is whether to opt-in +// (true) or out (false)). +MALLOC_DECL(jemalloc_thread_local_arena, void, bool) + +// Provide information about any allocation enclosing the given address. +MALLOC_DECL(jemalloc_ptr_info, void, const void*, jemalloc_ptr_info_t*) +# endif + +# if MALLOC_FUNCS & MALLOC_FUNCS_ARENA_BASE + +// Creates a separate arena, and returns its id, valid to use with moz_arena_* +// functions. A helper is provided in mozmemory.h that doesn't take any +// arena_params_t: moz_create_arena. +MALLOC_DECL(moz_create_arena_with_params, arena_id_t, arena_params_t*) + +// Dispose of the given arena. Subsequent uses of the arena will crash. +// Passing an invalid id (inexistent or already disposed) to this function +// will crash. The arena must be empty prior to calling this function. +MALLOC_DECL(moz_dispose_arena, void, arena_id_t) +# endif + +# if MALLOC_FUNCS & MALLOC_FUNCS_ARENA_ALLOC +// Same as the functions without the moz_arena_ prefix, but using arenas +// created with moz_create_arena. +// The contract, even if not enforced at runtime in some configurations, +// is that moz_arena_realloc and moz_arena_free will crash if the given +// arena doesn't own the given pointer. All functions will crash if the +// arena id is invalid. +// Although discouraged, plain realloc and free can still be used on +// pointers allocated with these functions. Realloc will properly keep +// new pointers in the same arena as the original. +MALLOC_DECL(moz_arena_malloc, void*, arena_id_t, size_t) +MALLOC_DECL(moz_arena_calloc, void*, arena_id_t, size_t, size_t) +MALLOC_DECL(moz_arena_realloc, void*, arena_id_t, void*, size_t) +MALLOC_DECL(moz_arena_free, void, arena_id_t, void*) +MALLOC_DECL(moz_arena_memalign, void*, arena_id_t, size_t, size_t) +# endif + +#endif // MALLOC_DECL + +#undef NOTHROW_MALLOC_DECL +#undef MALLOC_DECL +#undef MALLOC_FUNCS -- cgit v1.2.3