mirror of
https://github.com/wolfpld/tracy.git
synced 2024-11-27 00:04:35 +00:00
3519 lines
123 KiB
C++
3519 lines
123 KiB
C++
#ifdef TRACY_ENABLE
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/* rpmalloc.c - Memory allocator - Public Domain - 2016-2020 Mattias Jansson
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*
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* This library provides a cross-platform lock free thread caching malloc implementation in C11.
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* The latest source code is always available at
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*
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* https://github.com/mjansson/rpmalloc
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*
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* This library is put in the public domain; you can redistribute it and/or modify it without any restrictions.
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*
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*/
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#include "tracy_rpmalloc.hpp"
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#define BUILD_DYNAMIC_LINK 1
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////////////
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///
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/// Build time configurable limits
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///
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//////
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#if defined(__clang__)
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#pragma clang diagnostic ignored "-Wunused-macros"
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#pragma clang diagnostic ignored "-Wunused-function"
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#if __has_warning("-Wreserved-identifier")
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#pragma clang diagnostic ignored "-Wreserved-identifier"
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#endif
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#elif defined(__GNUC__)
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#pragma GCC diagnostic ignored "-Wunused-macros"
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#pragma GCC diagnostic ignored "-Wunused-function"
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#pragma GCC diagnostic ignored "-Warray-bounds"
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#endif
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#ifndef HEAP_ARRAY_SIZE
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//! Size of heap hashmap
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#define HEAP_ARRAY_SIZE 47
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#endif
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#ifndef ENABLE_THREAD_CACHE
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//! Enable per-thread cache
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#define ENABLE_THREAD_CACHE 1
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#endif
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#ifndef ENABLE_GLOBAL_CACHE
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//! Enable global cache shared between all threads, requires thread cache
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#define ENABLE_GLOBAL_CACHE 1
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#endif
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#ifndef ENABLE_VALIDATE_ARGS
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//! Enable validation of args to public entry points
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#define ENABLE_VALIDATE_ARGS 0
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#endif
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#ifndef ENABLE_STATISTICS
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//! Enable statistics collection
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#define ENABLE_STATISTICS 0
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#endif
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#ifndef ENABLE_ASSERTS
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//! Enable asserts
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#define ENABLE_ASSERTS 0
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#endif
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#ifndef ENABLE_OVERRIDE
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//! Override standard library malloc/free and new/delete entry points
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#define ENABLE_OVERRIDE 0
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#endif
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#ifndef ENABLE_PRELOAD
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//! Support preloading
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#define ENABLE_PRELOAD 0
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#endif
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#ifndef DISABLE_UNMAP
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//! Disable unmapping memory pages (also enables unlimited cache)
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#define DISABLE_UNMAP 0
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#endif
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#ifndef ENABLE_UNLIMITED_CACHE
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//! Enable unlimited global cache (no unmapping until finalization)
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#define ENABLE_UNLIMITED_CACHE 0
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#endif
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#ifndef ENABLE_ADAPTIVE_THREAD_CACHE
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//! Enable adaptive thread cache size based on use heuristics
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#define ENABLE_ADAPTIVE_THREAD_CACHE 0
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#endif
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#ifndef DEFAULT_SPAN_MAP_COUNT
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//! Default number of spans to map in call to map more virtual memory (default values yield 4MiB here)
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#define DEFAULT_SPAN_MAP_COUNT 64
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#endif
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#ifndef GLOBAL_CACHE_MULTIPLIER
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//! Multiplier for global cache
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#define GLOBAL_CACHE_MULTIPLIER 8
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#endif
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#if DISABLE_UNMAP && !ENABLE_GLOBAL_CACHE
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#error Must use global cache if unmap is disabled
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#endif
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#if DISABLE_UNMAP
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#undef ENABLE_UNLIMITED_CACHE
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#define ENABLE_UNLIMITED_CACHE 1
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#endif
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#if !ENABLE_GLOBAL_CACHE
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#undef ENABLE_UNLIMITED_CACHE
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#define ENABLE_UNLIMITED_CACHE 0
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#endif
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#if !ENABLE_THREAD_CACHE
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#undef ENABLE_ADAPTIVE_THREAD_CACHE
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#define ENABLE_ADAPTIVE_THREAD_CACHE 0
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#endif
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#if defined(_WIN32) || defined(__WIN32__) || defined(_WIN64)
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# define PLATFORM_WINDOWS 1
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# define PLATFORM_POSIX 0
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#else
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# define PLATFORM_WINDOWS 0
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# define PLATFORM_POSIX 1
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#endif
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/// Platform and arch specifics
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#if defined(_MSC_VER) && !defined(__clang__)
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# pragma warning (disable: 5105)
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# ifndef FORCEINLINE
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# define FORCEINLINE inline __forceinline
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# endif
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#else
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# ifndef FORCEINLINE
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# define FORCEINLINE inline __attribute__((__always_inline__))
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# endif
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#endif
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#if PLATFORM_WINDOWS
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# ifndef WIN32_LEAN_AND_MEAN
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# define WIN32_LEAN_AND_MEAN
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# endif
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# include <windows.h>
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# if ENABLE_VALIDATE_ARGS
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# include <intsafe.h>
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# endif
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#else
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# include <unistd.h>
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# include <stdio.h>
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# include <stdlib.h>
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# include <time.h>
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# if defined(__linux__) || defined(__ANDROID__)
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# include <sys/prctl.h>
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# if !defined(PR_SET_VMA)
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# define PR_SET_VMA 0x53564d41
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# define PR_SET_VMA_ANON_NAME 0
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# endif
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# endif
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# if defined(__APPLE__)
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# include <TargetConditionals.h>
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# if !TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR
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# include <mach/mach.h>
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# include <mach/vm_statistics.h>
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# endif
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# include <pthread.h>
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# endif
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# if defined(__HAIKU__) || defined(__TINYC__)
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# include <pthread.h>
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# endif
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#endif
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#if defined(_WIN32) && (!defined(BUILD_DYNAMIC_LINK) || !BUILD_DYNAMIC_LINK)
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#include <fibersapi.h>
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static DWORD fls_key;
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#endif
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#if PLATFORM_POSIX
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# include <sys/mman.h>
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# include <sched.h>
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# ifdef __FreeBSD__
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# include <sys/sysctl.h>
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# define MAP_HUGETLB MAP_ALIGNED_SUPER
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# ifndef PROT_MAX
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# define PROT_MAX(f) 0
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# endif
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# else
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# define PROT_MAX(f) 0
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# endif
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# ifdef __sun
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extern int madvise(caddr_t, size_t, int);
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# endif
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# ifndef MAP_UNINITIALIZED
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# define MAP_UNINITIALIZED 0
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# endif
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#endif
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#include <errno.h>
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#if ENABLE_ASSERTS
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# undef NDEBUG
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# if defined(_MSC_VER) && !defined(_DEBUG)
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# define _DEBUG
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# endif
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# include <assert.h>
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#define RPMALLOC_TOSTRING_M(x) #x
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#define RPMALLOC_TOSTRING(x) RPMALLOC_TOSTRING_M(x)
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#define rpmalloc_assert(truth, message) \
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do { \
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if (!(truth)) { \
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if (_memory_config.error_callback) { \
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_memory_config.error_callback( \
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message " (" RPMALLOC_TOSTRING(truth) ") at " __FILE__ ":" RPMALLOC_TOSTRING(__LINE__)); \
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} else { \
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assert((truth) && message); \
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} \
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} \
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} while (0)
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#else
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# define rpmalloc_assert(truth, message) do {} while(0)
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#endif
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#if ENABLE_STATISTICS
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# include <stdio.h>
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#endif
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//////
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///
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/// Atomic access abstraction (since MSVC does not do C11 yet)
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///
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//////
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#include <atomic>
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typedef std::atomic<int32_t> atomic32_t;
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typedef std::atomic<int64_t> atomic64_t;
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typedef std::atomic<void*> atomicptr_t;
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static FORCEINLINE int32_t atomic_load32(atomic32_t* src) { return std::atomic_load_explicit(src, std::memory_order_relaxed); }
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static FORCEINLINE void atomic_store32(atomic32_t* dst, int32_t val) { std::atomic_store_explicit(dst, val, std::memory_order_relaxed); }
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static FORCEINLINE int32_t atomic_incr32(atomic32_t* val) { return std::atomic_fetch_add_explicit(val, 1, std::memory_order_relaxed) + 1; }
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static FORCEINLINE int32_t atomic_decr32(atomic32_t* val) { return std::atomic_fetch_add_explicit(val, -1, std::memory_order_relaxed) - 1; }
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static FORCEINLINE int32_t atomic_add32(atomic32_t* val, int32_t add) { return std::atomic_fetch_add_explicit(val, add, std::memory_order_relaxed) + add; }
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static FORCEINLINE int atomic_cas32_acquire(atomic32_t* dst, int32_t val, int32_t ref) { return std::atomic_compare_exchange_weak_explicit(dst, &ref, val, std::memory_order_acquire, std::memory_order_relaxed); }
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static FORCEINLINE void atomic_store32_release(atomic32_t* dst, int32_t val) { std::atomic_store_explicit(dst, val, std::memory_order_release); }
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static FORCEINLINE int64_t atomic_load64(atomic64_t* val) { return std::atomic_load_explicit(val, std::memory_order_relaxed); }
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static FORCEINLINE int64_t atomic_add64(atomic64_t* val, int64_t add) { return std::atomic_fetch_add_explicit(val, add, std::memory_order_relaxed) + add; }
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static FORCEINLINE void* atomic_load_ptr(atomicptr_t* src) { return std::atomic_load_explicit(src, std::memory_order_relaxed); }
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static FORCEINLINE void atomic_store_ptr(atomicptr_t* dst, void* val) { std::atomic_store_explicit(dst, val, std::memory_order_relaxed); }
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static FORCEINLINE void atomic_store_ptr_release(atomicptr_t* dst, void* val) { std::atomic_store_explicit(dst, val, std::memory_order_release); }
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static FORCEINLINE void* atomic_exchange_ptr_acquire(atomicptr_t* dst, void* val) { return std::atomic_exchange_explicit(dst, val, std::memory_order_acquire); }
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static FORCEINLINE int atomic_cas_ptr(atomicptr_t* dst, void* val, void* ref) { return std::atomic_compare_exchange_weak_explicit(dst, &ref, val, std::memory_order_relaxed, std::memory_order_relaxed); }
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#if defined(_MSC_VER) && !defined(__clang__)
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#define EXPECTED(x) (x)
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#define UNEXPECTED(x) (x)
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#else
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#define EXPECTED(x) __builtin_expect((x), 1)
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#define UNEXPECTED(x) __builtin_expect((x), 0)
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#endif
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////////////
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///
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/// Statistics related functions (evaluate to nothing when statistics not enabled)
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///
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//////
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#if ENABLE_STATISTICS
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# define _rpmalloc_stat_inc(counter) atomic_incr32(counter)
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# define _rpmalloc_stat_dec(counter) atomic_decr32(counter)
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# define _rpmalloc_stat_add(counter, value) atomic_add32(counter, (int32_t)(value))
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# define _rpmalloc_stat_add64(counter, value) atomic_add64(counter, (int64_t)(value))
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# define _rpmalloc_stat_add_peak(counter, value, peak) do { int32_t _cur_count = atomic_add32(counter, (int32_t)(value)); if (_cur_count > (peak)) peak = _cur_count; } while (0)
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# define _rpmalloc_stat_sub(counter, value) atomic_add32(counter, -(int32_t)(value))
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# define _rpmalloc_stat_inc_alloc(heap, class_idx) do { \
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int32_t alloc_current = atomic_incr32(&heap->size_class_use[class_idx].alloc_current); \
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if (alloc_current > heap->size_class_use[class_idx].alloc_peak) \
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heap->size_class_use[class_idx].alloc_peak = alloc_current; \
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atomic_incr32(&heap->size_class_use[class_idx].alloc_total); \
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} while(0)
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# define _rpmalloc_stat_inc_free(heap, class_idx) do { \
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atomic_decr32(&heap->size_class_use[class_idx].alloc_current); \
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atomic_incr32(&heap->size_class_use[class_idx].free_total); \
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} while(0)
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#else
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# define _rpmalloc_stat_inc(counter) do {} while(0)
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# define _rpmalloc_stat_dec(counter) do {} while(0)
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# define _rpmalloc_stat_add(counter, value) do {} while(0)
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# define _rpmalloc_stat_add64(counter, value) do {} while(0)
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# define _rpmalloc_stat_add_peak(counter, value, peak) do {} while (0)
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# define _rpmalloc_stat_sub(counter, value) do {} while(0)
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# define _rpmalloc_stat_inc_alloc(heap, class_idx) do {} while(0)
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# define _rpmalloc_stat_inc_free(heap, class_idx) do {} while(0)
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#endif
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///
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/// Preconfigured limits and sizes
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///
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//! Granularity of a small allocation block (must be power of two)
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#define SMALL_GRANULARITY 16
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//! Small granularity shift count
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#define SMALL_GRANULARITY_SHIFT 4
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//! Number of small block size classes
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#define SMALL_CLASS_COUNT 65
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//! Maximum size of a small block
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#define SMALL_SIZE_LIMIT (SMALL_GRANULARITY * (SMALL_CLASS_COUNT - 1))
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//! Granularity of a medium allocation block
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#define MEDIUM_GRANULARITY 512
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//! Medium granularity shift count
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#define MEDIUM_GRANULARITY_SHIFT 9
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//! Number of medium block size classes
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#define MEDIUM_CLASS_COUNT 61
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//! Total number of small + medium size classes
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#define SIZE_CLASS_COUNT (SMALL_CLASS_COUNT + MEDIUM_CLASS_COUNT)
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//! Number of large block size classes
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#define LARGE_CLASS_COUNT 63
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//! Maximum size of a medium block
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#define MEDIUM_SIZE_LIMIT (SMALL_SIZE_LIMIT + (MEDIUM_GRANULARITY * MEDIUM_CLASS_COUNT))
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//! Maximum size of a large block
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#define LARGE_SIZE_LIMIT ((LARGE_CLASS_COUNT * _memory_span_size) - SPAN_HEADER_SIZE)
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//! Size of a span header (must be a multiple of SMALL_GRANULARITY and a power of two)
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#define SPAN_HEADER_SIZE 128
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//! Number of spans in thread cache
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#define MAX_THREAD_SPAN_CACHE 400
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//! Number of spans to transfer between thread and global cache
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#define THREAD_SPAN_CACHE_TRANSFER 64
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//! Number of spans in thread cache for large spans (must be greater than LARGE_CLASS_COUNT / 2)
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#define MAX_THREAD_SPAN_LARGE_CACHE 100
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//! Number of spans to transfer between thread and global cache for large spans
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#define THREAD_SPAN_LARGE_CACHE_TRANSFER 6
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static_assert((SMALL_GRANULARITY & (SMALL_GRANULARITY - 1)) == 0, "Small granularity must be power of two");
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static_assert((SPAN_HEADER_SIZE & (SPAN_HEADER_SIZE - 1)) == 0, "Span header size must be power of two");
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#if ENABLE_VALIDATE_ARGS
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//! Maximum allocation size to avoid integer overflow
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#undef MAX_ALLOC_SIZE
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#define MAX_ALLOC_SIZE (((size_t)-1) - _memory_span_size)
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#endif
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#define pointer_offset(ptr, ofs) (void*)((char*)(ptr) + (ptrdiff_t)(ofs))
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#define pointer_diff(first, second) (ptrdiff_t)((const char*)(first) - (const char*)(second))
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#define INVALID_POINTER ((void*)((uintptr_t)-1))
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#define SIZE_CLASS_LARGE SIZE_CLASS_COUNT
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#define SIZE_CLASS_HUGE ((uint32_t)-1)
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////////////
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///
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/// Data types
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///
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//////
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namespace tracy
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{
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//! A memory heap, per thread
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typedef struct heap_t heap_t;
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//! Span of memory pages
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typedef struct span_t span_t;
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//! Span list
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typedef struct span_list_t span_list_t;
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//! Span active data
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typedef struct span_active_t span_active_t;
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//! Size class definition
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typedef struct size_class_t size_class_t;
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//! Global cache
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typedef struct global_cache_t global_cache_t;
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//! Flag indicating span is the first (master) span of a split superspan
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#define SPAN_FLAG_MASTER 1U
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//! Flag indicating span is a secondary (sub) span of a split superspan
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#define SPAN_FLAG_SUBSPAN 2U
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//! Flag indicating span has blocks with increased alignment
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#define SPAN_FLAG_ALIGNED_BLOCKS 4U
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//! Flag indicating an unmapped master span
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#define SPAN_FLAG_UNMAPPED_MASTER 8U
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#if ENABLE_ADAPTIVE_THREAD_CACHE || ENABLE_STATISTICS
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struct span_use_t {
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//! Current number of spans used (actually used, not in cache)
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atomic32_t current;
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//! High water mark of spans used
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atomic32_t high;
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#if ENABLE_STATISTICS
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//! Number of spans in deferred list
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atomic32_t spans_deferred;
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//! Number of spans transitioned to global cache
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atomic32_t spans_to_global;
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//! Number of spans transitioned from global cache
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atomic32_t spans_from_global;
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//! Number of spans transitioned to thread cache
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atomic32_t spans_to_cache;
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//! Number of spans transitioned from thread cache
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atomic32_t spans_from_cache;
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//! Number of spans transitioned to reserved state
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atomic32_t spans_to_reserved;
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//! Number of spans transitioned from reserved state
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atomic32_t spans_from_reserved;
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//! Number of raw memory map calls
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atomic32_t spans_map_calls;
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#endif
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};
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typedef struct span_use_t span_use_t;
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#endif
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#if ENABLE_STATISTICS
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struct size_class_use_t {
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//! Current number of allocations
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atomic32_t alloc_current;
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//! Peak number of allocations
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int32_t alloc_peak;
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//! Total number of allocations
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atomic32_t alloc_total;
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//! Total number of frees
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atomic32_t free_total;
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//! Number of spans in use
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atomic32_t spans_current;
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//! Number of spans transitioned to cache
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int32_t spans_peak;
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//! Number of spans transitioned to cache
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atomic32_t spans_to_cache;
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//! Number of spans transitioned from cache
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atomic32_t spans_from_cache;
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//! Number of spans transitioned from reserved state
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atomic32_t spans_from_reserved;
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//! Number of spans mapped
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atomic32_t spans_map_calls;
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int32_t unused;
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};
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typedef struct size_class_use_t size_class_use_t;
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#endif
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// A span can either represent a single span of memory pages with size declared by span_map_count configuration variable,
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// or a set of spans in a continuous region, a super span. Any reference to the term "span" usually refers to both a single
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// span or a super span. A super span can further be divided into multiple spans (or this, super spans), where the first
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// (super)span is the master and subsequent (super)spans are subspans. The master span keeps track of how many subspans
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// that are still alive and mapped in virtual memory, and once all subspans and master have been unmapped the entire
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// superspan region is released and unmapped (on Windows for example, the entire superspan range has to be released
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// in the same call to release the virtual memory range, but individual subranges can be decommitted individually
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// to reduce physical memory use).
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struct span_t {
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//! Free list
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void* free_list;
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//! Total block count of size class
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uint32_t block_count;
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//! Size class
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uint32_t size_class;
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//! Index of last block initialized in free list
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uint32_t free_list_limit;
|
|
//! Number of used blocks remaining when in partial state
|
|
uint32_t used_count;
|
|
//! Deferred free list
|
|
atomicptr_t free_list_deferred;
|
|
//! Size of deferred free list, or list of spans when part of a cache list
|
|
uint32_t list_size;
|
|
//! Size of a block
|
|
uint32_t block_size;
|
|
//! Flags and counters
|
|
uint32_t flags;
|
|
//! Number of spans
|
|
uint32_t span_count;
|
|
//! Total span counter for master spans
|
|
uint32_t total_spans;
|
|
//! Offset from master span for subspans
|
|
uint32_t offset_from_master;
|
|
//! Remaining span counter, for master spans
|
|
atomic32_t remaining_spans;
|
|
//! Alignment offset
|
|
uint32_t align_offset;
|
|
//! Owning heap
|
|
heap_t* heap;
|
|
//! Next span
|
|
span_t* next;
|
|
//! Previous span
|
|
span_t* prev;
|
|
};
|
|
static_assert(sizeof(span_t) <= SPAN_HEADER_SIZE, "span size mismatch");
|
|
|
|
struct span_cache_t {
|
|
size_t count;
|
|
span_t* span[MAX_THREAD_SPAN_CACHE];
|
|
};
|
|
typedef struct span_cache_t span_cache_t;
|
|
|
|
struct span_large_cache_t {
|
|
size_t count;
|
|
span_t* span[MAX_THREAD_SPAN_LARGE_CACHE];
|
|
};
|
|
typedef struct span_large_cache_t span_large_cache_t;
|
|
|
|
struct heap_size_class_t {
|
|
//! Free list of active span
|
|
void* free_list;
|
|
//! Double linked list of partially used spans with free blocks.
|
|
// Previous span pointer in head points to tail span of list.
|
|
span_t* partial_span;
|
|
//! Early level cache of fully free spans
|
|
span_t* cache;
|
|
};
|
|
typedef struct heap_size_class_t heap_size_class_t;
|
|
|
|
// Control structure for a heap, either a thread heap or a first class heap if enabled
|
|
struct heap_t {
|
|
//! Owning thread ID
|
|
uintptr_t owner_thread;
|
|
//! Free lists for each size class
|
|
heap_size_class_t size_class[SIZE_CLASS_COUNT];
|
|
#if ENABLE_THREAD_CACHE
|
|
//! Arrays of fully freed spans, single span
|
|
span_cache_t span_cache;
|
|
#endif
|
|
//! List of deferred free spans (single linked list)
|
|
atomicptr_t span_free_deferred;
|
|
//! Number of full spans
|
|
size_t full_span_count;
|
|
//! Mapped but unused spans
|
|
span_t* span_reserve;
|
|
//! Master span for mapped but unused spans
|
|
span_t* span_reserve_master;
|
|
//! Number of mapped but unused spans
|
|
uint32_t spans_reserved;
|
|
//! Child count
|
|
atomic32_t child_count;
|
|
//! Next heap in id list
|
|
heap_t* next_heap;
|
|
//! Next heap in orphan list
|
|
heap_t* next_orphan;
|
|
//! Heap ID
|
|
int32_t id;
|
|
//! Finalization state flag
|
|
int finalize;
|
|
//! Master heap owning the memory pages
|
|
heap_t* master_heap;
|
|
#if ENABLE_THREAD_CACHE
|
|
//! Arrays of fully freed spans, large spans with > 1 span count
|
|
span_large_cache_t span_large_cache[LARGE_CLASS_COUNT - 1];
|
|
#endif
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
//! Double linked list of fully utilized spans with free blocks for each size class.
|
|
// Previous span pointer in head points to tail span of list.
|
|
span_t* full_span[SIZE_CLASS_COUNT];
|
|
//! Double linked list of large and huge spans allocated by this heap
|
|
span_t* large_huge_span;
|
|
#endif
|
|
#if ENABLE_ADAPTIVE_THREAD_CACHE || ENABLE_STATISTICS
|
|
//! Current and high water mark of spans used per span count
|
|
span_use_t span_use[LARGE_CLASS_COUNT];
|
|
#endif
|
|
#if ENABLE_STATISTICS
|
|
//! Allocation stats per size class
|
|
size_class_use_t size_class_use[SIZE_CLASS_COUNT + 1];
|
|
//! Number of bytes transitioned thread -> global
|
|
atomic64_t thread_to_global;
|
|
//! Number of bytes transitioned global -> thread
|
|
atomic64_t global_to_thread;
|
|
#endif
|
|
};
|
|
|
|
// Size class for defining a block size bucket
|
|
struct size_class_t {
|
|
//! Size of blocks in this class
|
|
uint32_t block_size;
|
|
//! Number of blocks in each chunk
|
|
uint16_t block_count;
|
|
//! Class index this class is merged with
|
|
uint16_t class_idx;
|
|
};
|
|
static_assert(sizeof(size_class_t) == 8, "Size class size mismatch");
|
|
|
|
struct global_cache_t {
|
|
//! Cache lock
|
|
atomic32_t lock;
|
|
//! Cache count
|
|
uint32_t count;
|
|
#if ENABLE_STATISTICS
|
|
//! Insert count
|
|
size_t insert_count;
|
|
//! Extract count
|
|
size_t extract_count;
|
|
#endif
|
|
//! Cached spans
|
|
span_t* span[GLOBAL_CACHE_MULTIPLIER * MAX_THREAD_SPAN_CACHE];
|
|
//! Unlimited cache overflow
|
|
span_t* overflow;
|
|
};
|
|
|
|
////////////
|
|
///
|
|
/// Global data
|
|
///
|
|
//////
|
|
|
|
//! Default span size (64KiB)
|
|
#define _memory_default_span_size (64 * 1024)
|
|
#define _memory_default_span_size_shift 16
|
|
#define _memory_default_span_mask (~((uintptr_t)(_memory_span_size - 1)))
|
|
|
|
//! Initialized flag
|
|
static int _rpmalloc_initialized;
|
|
//! Main thread ID
|
|
static uintptr_t _rpmalloc_main_thread_id;
|
|
//! Configuration
|
|
static rpmalloc_config_t _memory_config;
|
|
//! Memory page size
|
|
static size_t _memory_page_size;
|
|
//! Shift to divide by page size
|
|
static size_t _memory_page_size_shift;
|
|
//! Granularity at which memory pages are mapped by OS
|
|
static size_t _memory_map_granularity;
|
|
#if RPMALLOC_CONFIGURABLE
|
|
//! Size of a span of memory pages
|
|
static size_t _memory_span_size;
|
|
//! Shift to divide by span size
|
|
static size_t _memory_span_size_shift;
|
|
//! Mask to get to start of a memory span
|
|
static uintptr_t _memory_span_mask;
|
|
#else
|
|
//! Hardwired span size
|
|
#define _memory_span_size _memory_default_span_size
|
|
#define _memory_span_size_shift _memory_default_span_size_shift
|
|
#define _memory_span_mask _memory_default_span_mask
|
|
#endif
|
|
//! Number of spans to map in each map call
|
|
static size_t _memory_span_map_count;
|
|
//! Number of spans to keep reserved in each heap
|
|
static size_t _memory_heap_reserve_count;
|
|
//! Global size classes
|
|
static size_class_t _memory_size_class[SIZE_CLASS_COUNT];
|
|
//! Run-time size limit of medium blocks
|
|
static size_t _memory_medium_size_limit;
|
|
//! Heap ID counter
|
|
static atomic32_t _memory_heap_id;
|
|
//! Huge page support
|
|
static int _memory_huge_pages;
|
|
#if ENABLE_GLOBAL_CACHE
|
|
//! Global span cache
|
|
static global_cache_t _memory_span_cache[LARGE_CLASS_COUNT];
|
|
#endif
|
|
//! Global reserved spans
|
|
static span_t* _memory_global_reserve;
|
|
//! Global reserved count
|
|
static size_t _memory_global_reserve_count;
|
|
//! Global reserved master
|
|
static span_t* _memory_global_reserve_master;
|
|
//! All heaps
|
|
static heap_t* _memory_heaps[HEAP_ARRAY_SIZE];
|
|
//! Used to restrict access to mapping memory for huge pages
|
|
static atomic32_t _memory_global_lock;
|
|
//! Orphaned heaps
|
|
static heap_t* _memory_orphan_heaps;
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
//! Orphaned heaps (first class heaps)
|
|
static heap_t* _memory_first_class_orphan_heaps;
|
|
#endif
|
|
#if ENABLE_STATISTICS
|
|
//! Allocations counter
|
|
static atomic64_t _allocation_counter;
|
|
//! Deallocations counter
|
|
static atomic64_t _deallocation_counter;
|
|
//! Active heap count
|
|
static atomic32_t _memory_active_heaps;
|
|
//! Number of currently mapped memory pages
|
|
static atomic32_t _mapped_pages;
|
|
//! Peak number of concurrently mapped memory pages
|
|
static int32_t _mapped_pages_peak;
|
|
//! Number of mapped master spans
|
|
static atomic32_t _master_spans;
|
|
//! Number of unmapped dangling master spans
|
|
static atomic32_t _unmapped_master_spans;
|
|
//! Running counter of total number of mapped memory pages since start
|
|
static atomic32_t _mapped_total;
|
|
//! Running counter of total number of unmapped memory pages since start
|
|
static atomic32_t _unmapped_total;
|
|
//! Number of currently mapped memory pages in OS calls
|
|
static atomic32_t _mapped_pages_os;
|
|
//! Number of currently allocated pages in huge allocations
|
|
static atomic32_t _huge_pages_current;
|
|
//! Peak number of currently allocated pages in huge allocations
|
|
static int32_t _huge_pages_peak;
|
|
#endif
|
|
|
|
////////////
|
|
///
|
|
/// Thread local heap and ID
|
|
///
|
|
//////
|
|
|
|
//! Current thread heap
|
|
#if ((defined(__APPLE__) || defined(__HAIKU__)) && ENABLE_PRELOAD) || defined(__TINYC__)
|
|
static pthread_key_t _memory_thread_heap;
|
|
#else
|
|
# ifdef _MSC_VER
|
|
# define _Thread_local __declspec(thread)
|
|
# define TLS_MODEL
|
|
# else
|
|
# ifndef __HAIKU__
|
|
# define TLS_MODEL __attribute__((tls_model("initial-exec")))
|
|
# else
|
|
# define TLS_MODEL
|
|
# endif
|
|
# if !defined(__clang__) && defined(__GNUC__)
|
|
# define _Thread_local __thread
|
|
# endif
|
|
# endif
|
|
static _Thread_local heap_t* _memory_thread_heap TLS_MODEL;
|
|
#endif
|
|
|
|
static inline heap_t*
|
|
get_thread_heap_raw(void) {
|
|
#if (defined(__APPLE__) || defined(__HAIKU__)) && ENABLE_PRELOAD
|
|
return pthread_getspecific(_memory_thread_heap);
|
|
#else
|
|
return _memory_thread_heap;
|
|
#endif
|
|
}
|
|
|
|
//! Get the current thread heap
|
|
static inline heap_t*
|
|
get_thread_heap(void) {
|
|
heap_t* heap = get_thread_heap_raw();
|
|
#if ENABLE_PRELOAD
|
|
if (EXPECTED(heap != 0))
|
|
return heap;
|
|
rpmalloc_initialize();
|
|
return get_thread_heap_raw();
|
|
#else
|
|
return heap;
|
|
#endif
|
|
}
|
|
|
|
//! Fast thread ID
|
|
static inline uintptr_t
|
|
get_thread_id(void) {
|
|
#if defined(_WIN32)
|
|
return (uintptr_t)((void*)NtCurrentTeb());
|
|
#elif (defined(__GNUC__) || defined(__clang__)) && !defined(__CYGWIN__)
|
|
uintptr_t tid;
|
|
# if defined(__i386__)
|
|
__asm__("movl %%gs:0, %0" : "=r" (tid) : : );
|
|
# elif defined(__x86_64__)
|
|
# if defined(__MACH__)
|
|
__asm__("movq %%gs:0, %0" : "=r" (tid) : : );
|
|
# else
|
|
__asm__("movq %%fs:0, %0" : "=r" (tid) : : );
|
|
# endif
|
|
# elif defined(__arm__)
|
|
__asm__ volatile ("mrc p15, 0, %0, c13, c0, 3" : "=r" (tid));
|
|
# elif defined(__aarch64__)
|
|
# if defined(__MACH__)
|
|
// tpidr_el0 likely unused, always return 0 on iOS
|
|
__asm__ volatile ("mrs %0, tpidrro_el0" : "=r" (tid));
|
|
# else
|
|
__asm__ volatile ("mrs %0, tpidr_el0" : "=r" (tid));
|
|
# endif
|
|
# else
|
|
tid = (uintptr_t)((void*)get_thread_heap_raw());
|
|
# endif
|
|
return tid;
|
|
#else
|
|
return (uintptr_t)((void*)get_thread_heap_raw());
|
|
#endif
|
|
}
|
|
|
|
//! Set the current thread heap
|
|
static void
|
|
set_thread_heap(heap_t* heap) {
|
|
#if ((defined(__APPLE__) || defined(__HAIKU__)) && ENABLE_PRELOAD) || defined(__TINYC__)
|
|
pthread_setspecific(_memory_thread_heap, heap);
|
|
#else
|
|
_memory_thread_heap = heap;
|
|
#endif
|
|
if (heap)
|
|
heap->owner_thread = get_thread_id();
|
|
}
|
|
|
|
//! Set main thread ID
|
|
extern void
|
|
rpmalloc_set_main_thread(void);
|
|
|
|
void
|
|
rpmalloc_set_main_thread(void) {
|
|
_rpmalloc_main_thread_id = get_thread_id();
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_spin(void) {
|
|
#if defined(_MSC_VER)
|
|
_mm_pause();
|
|
#elif defined(__x86_64__) || defined(__i386__)
|
|
__asm__ volatile("pause" ::: "memory");
|
|
#elif defined(__aarch64__) || (defined(__arm__) && __ARM_ARCH >= 7)
|
|
__asm__ volatile("yield" ::: "memory");
|
|
#elif defined(__powerpc__) || defined(__powerpc64__)
|
|
// No idea if ever been compiled in such archs but ... as precaution
|
|
__asm__ volatile("or 27,27,27");
|
|
#elif defined(__sparc__)
|
|
__asm__ volatile("rd %ccr, %g0 \n\trd %ccr, %g0 \n\trd %ccr, %g0");
|
|
#else
|
|
struct timespec ts = {0};
|
|
nanosleep(&ts, 0);
|
|
#endif
|
|
}
|
|
|
|
#if defined(_WIN32) && (!defined(BUILD_DYNAMIC_LINK) || !BUILD_DYNAMIC_LINK)
|
|
static void NTAPI
|
|
_rpmalloc_thread_destructor(void* value) {
|
|
#if ENABLE_OVERRIDE
|
|
// If this is called on main thread it means rpmalloc_finalize
|
|
// has not been called and shutdown is forced (through _exit) or unclean
|
|
if (get_thread_id() == _rpmalloc_main_thread_id)
|
|
return;
|
|
#endif
|
|
if (value)
|
|
rpmalloc_thread_finalize(1);
|
|
}
|
|
#endif
|
|
|
|
|
|
////////////
|
|
///
|
|
/// Low level memory map/unmap
|
|
///
|
|
//////
|
|
|
|
static void
|
|
_rpmalloc_set_name(void* address, size_t size) {
|
|
#if defined(__linux__) || defined(__ANDROID__)
|
|
const char *name = _memory_huge_pages ? _memory_config.huge_page_name : _memory_config.page_name;
|
|
if (address == MAP_FAILED || !name)
|
|
return;
|
|
// If the kernel does not support CONFIG_ANON_VMA_NAME or if the call fails
|
|
// (e.g. invalid name) it is a no-op basically.
|
|
(void)prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, (uintptr_t)address, size, (uintptr_t)name);
|
|
#else
|
|
(void)sizeof(size);
|
|
(void)sizeof(address);
|
|
#endif
|
|
}
|
|
|
|
|
|
//! Map more virtual memory
|
|
// size is number of bytes to map
|
|
// offset receives the offset in bytes from start of mapped region
|
|
// returns address to start of mapped region to use
|
|
static void*
|
|
_rpmalloc_mmap(size_t size, size_t* offset) {
|
|
rpmalloc_assert(!(size % _memory_page_size), "Invalid mmap size");
|
|
rpmalloc_assert(size >= _memory_page_size, "Invalid mmap size");
|
|
void* address = _memory_config.memory_map(size, offset);
|
|
if (EXPECTED(address != 0)) {
|
|
_rpmalloc_stat_add_peak(&_mapped_pages, (size >> _memory_page_size_shift), _mapped_pages_peak);
|
|
_rpmalloc_stat_add(&_mapped_total, (size >> _memory_page_size_shift));
|
|
}
|
|
return address;
|
|
}
|
|
|
|
//! Unmap virtual memory
|
|
// address is the memory address to unmap, as returned from _memory_map
|
|
// size is the number of bytes to unmap, which might be less than full region for a partial unmap
|
|
// offset is the offset in bytes to the actual mapped region, as set by _memory_map
|
|
// release is set to 0 for partial unmap, or size of entire range for a full unmap
|
|
static void
|
|
_rpmalloc_unmap(void* address, size_t size, size_t offset, size_t release) {
|
|
rpmalloc_assert(!release || (release >= size), "Invalid unmap size");
|
|
rpmalloc_assert(!release || (release >= _memory_page_size), "Invalid unmap size");
|
|
if (release) {
|
|
rpmalloc_assert(!(release % _memory_page_size), "Invalid unmap size");
|
|
_rpmalloc_stat_sub(&_mapped_pages, (release >> _memory_page_size_shift));
|
|
_rpmalloc_stat_add(&_unmapped_total, (release >> _memory_page_size_shift));
|
|
}
|
|
_memory_config.memory_unmap(address, size, offset, release);
|
|
}
|
|
|
|
//! Default implementation to map new pages to virtual memory
|
|
static void*
|
|
_rpmalloc_mmap_os(size_t size, size_t* offset) {
|
|
//Either size is a heap (a single page) or a (multiple) span - we only need to align spans, and only if larger than map granularity
|
|
size_t padding = ((size >= _memory_span_size) && (_memory_span_size > _memory_map_granularity)) ? _memory_span_size : 0;
|
|
rpmalloc_assert(size >= _memory_page_size, "Invalid mmap size");
|
|
#if PLATFORM_WINDOWS
|
|
//Ok to MEM_COMMIT - according to MSDN, "actual physical pages are not allocated unless/until the virtual addresses are actually accessed"
|
|
void* ptr = VirtualAlloc(0, size + padding, (_memory_huge_pages ? MEM_LARGE_PAGES : 0) | MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
|
|
if (!ptr) {
|
|
if (_memory_config.map_fail_callback) {
|
|
if (_memory_config.map_fail_callback(size + padding))
|
|
return _rpmalloc_mmap_os(size, offset);
|
|
} else {
|
|
rpmalloc_assert(ptr, "Failed to map virtual memory block");
|
|
}
|
|
return 0;
|
|
}
|
|
#else
|
|
int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_UNINITIALIZED;
|
|
# if defined(__APPLE__) && !TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR
|
|
int fd = (int)VM_MAKE_TAG(240U);
|
|
if (_memory_huge_pages)
|
|
fd |= VM_FLAGS_SUPERPAGE_SIZE_2MB;
|
|
void* ptr = mmap(0, size + padding, PROT_READ | PROT_WRITE, flags, fd, 0);
|
|
# elif defined(MAP_HUGETLB)
|
|
void* ptr = mmap(0, size + padding, PROT_READ | PROT_WRITE | PROT_MAX(PROT_READ | PROT_WRITE), (_memory_huge_pages ? MAP_HUGETLB : 0) | flags, -1, 0);
|
|
# if defined(MADV_HUGEPAGE)
|
|
// In some configurations, huge pages allocations might fail thus
|
|
// we fallback to normal allocations and promote the region as transparent huge page
|
|
if ((ptr == MAP_FAILED || !ptr) && _memory_huge_pages) {
|
|
ptr = mmap(0, size + padding, PROT_READ | PROT_WRITE, flags, -1, 0);
|
|
if (ptr && ptr != MAP_FAILED) {
|
|
int prm = madvise(ptr, size + padding, MADV_HUGEPAGE);
|
|
(void)prm;
|
|
rpmalloc_assert((prm == 0), "Failed to promote the page to THP");
|
|
}
|
|
}
|
|
# endif
|
|
_rpmalloc_set_name(ptr, size + padding);
|
|
# elif defined(MAP_ALIGNED)
|
|
const size_t align = (sizeof(size_t) * 8) - (size_t)(__builtin_clzl(size - 1));
|
|
void* ptr = mmap(0, size + padding, PROT_READ | PROT_WRITE, (_memory_huge_pages ? MAP_ALIGNED(align) : 0) | flags, -1, 0);
|
|
# elif defined(MAP_ALIGN)
|
|
caddr_t base = (_memory_huge_pages ? (caddr_t)(4 << 20) : 0);
|
|
void* ptr = mmap(base, size + padding, PROT_READ | PROT_WRITE, (_memory_huge_pages ? MAP_ALIGN : 0) | flags, -1, 0);
|
|
# else
|
|
void* ptr = mmap(0, size + padding, PROT_READ | PROT_WRITE, flags, -1, 0);
|
|
# endif
|
|
if ((ptr == MAP_FAILED) || !ptr) {
|
|
if (_memory_config.map_fail_callback) {
|
|
if (_memory_config.map_fail_callback(size + padding))
|
|
return _rpmalloc_mmap_os(size, offset);
|
|
} else if (errno != ENOMEM) {
|
|
rpmalloc_assert((ptr != MAP_FAILED) && ptr, "Failed to map virtual memory block");
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
_rpmalloc_stat_add(&_mapped_pages_os, (int32_t)((size + padding) >> _memory_page_size_shift));
|
|
if (padding) {
|
|
size_t final_padding = padding - ((uintptr_t)ptr & ~_memory_span_mask);
|
|
rpmalloc_assert(final_padding <= _memory_span_size, "Internal failure in padding");
|
|
rpmalloc_assert(final_padding <= padding, "Internal failure in padding");
|
|
rpmalloc_assert(!(final_padding % 8), "Internal failure in padding");
|
|
ptr = pointer_offset(ptr, final_padding);
|
|
*offset = final_padding >> 3;
|
|
}
|
|
rpmalloc_assert((size < _memory_span_size) || !((uintptr_t)ptr & ~_memory_span_mask), "Internal failure in padding");
|
|
return ptr;
|
|
}
|
|
|
|
//! Default implementation to unmap pages from virtual memory
|
|
static void
|
|
_rpmalloc_unmap_os(void* address, size_t size, size_t offset, size_t release) {
|
|
rpmalloc_assert(release || (offset == 0), "Invalid unmap size");
|
|
rpmalloc_assert(!release || (release >= _memory_page_size), "Invalid unmap size");
|
|
rpmalloc_assert(size >= _memory_page_size, "Invalid unmap size");
|
|
if (release && offset) {
|
|
offset <<= 3;
|
|
address = pointer_offset(address, -(int32_t)offset);
|
|
if ((release >= _memory_span_size) && (_memory_span_size > _memory_map_granularity)) {
|
|
//Padding is always one span size
|
|
release += _memory_span_size;
|
|
}
|
|
}
|
|
#if !DISABLE_UNMAP
|
|
#if PLATFORM_WINDOWS
|
|
if (!VirtualFree(address, release ? 0 : size, release ? MEM_RELEASE : MEM_DECOMMIT)) {
|
|
rpmalloc_assert(0, "Failed to unmap virtual memory block");
|
|
}
|
|
#else
|
|
if (release) {
|
|
if (munmap(address, release)) {
|
|
rpmalloc_assert(0, "Failed to unmap virtual memory block");
|
|
}
|
|
} else {
|
|
#if defined(MADV_FREE_REUSABLE)
|
|
int ret;
|
|
while ((ret = madvise(address, size, MADV_FREE_REUSABLE)) == -1 && (errno == EAGAIN))
|
|
errno = 0;
|
|
if ((ret == -1) && (errno != 0)) {
|
|
#elif defined(MADV_DONTNEED)
|
|
if (madvise(address, size, MADV_DONTNEED)) {
|
|
#elif defined(MADV_PAGEOUT)
|
|
if (madvise(address, size, MADV_PAGEOUT)) {
|
|
#elif defined(MADV_FREE)
|
|
if (madvise(address, size, MADV_FREE)) {
|
|
#else
|
|
if (posix_madvise(address, size, POSIX_MADV_DONTNEED)) {
|
|
#endif
|
|
rpmalloc_assert(0, "Failed to madvise virtual memory block as free");
|
|
}
|
|
}
|
|
#endif
|
|
#endif
|
|
if (release)
|
|
_rpmalloc_stat_sub(&_mapped_pages_os, release >> _memory_page_size_shift);
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_span_mark_as_subspan_unless_master(span_t* master, span_t* subspan, size_t span_count);
|
|
|
|
//! Use global reserved spans to fulfill a memory map request (reserve size must be checked by caller)
|
|
static span_t*
|
|
_rpmalloc_global_get_reserved_spans(size_t span_count) {
|
|
span_t* span = _memory_global_reserve;
|
|
_rpmalloc_span_mark_as_subspan_unless_master(_memory_global_reserve_master, span, span_count);
|
|
_memory_global_reserve_count -= span_count;
|
|
if (_memory_global_reserve_count)
|
|
_memory_global_reserve = (span_t*)pointer_offset(span, span_count << _memory_span_size_shift);
|
|
else
|
|
_memory_global_reserve = 0;
|
|
return span;
|
|
}
|
|
|
|
//! Store the given spans as global reserve (must only be called from within new heap allocation, not thread safe)
|
|
static void
|
|
_rpmalloc_global_set_reserved_spans(span_t* master, span_t* reserve, size_t reserve_span_count) {
|
|
_memory_global_reserve_master = master;
|
|
_memory_global_reserve_count = reserve_span_count;
|
|
_memory_global_reserve = reserve;
|
|
}
|
|
|
|
|
|
////////////
|
|
///
|
|
/// Span linked list management
|
|
///
|
|
//////
|
|
|
|
//! Add a span to double linked list at the head
|
|
static void
|
|
_rpmalloc_span_double_link_list_add(span_t** head, span_t* span) {
|
|
if (*head)
|
|
(*head)->prev = span;
|
|
span->next = *head;
|
|
*head = span;
|
|
}
|
|
|
|
//! Pop head span from double linked list
|
|
static void
|
|
_rpmalloc_span_double_link_list_pop_head(span_t** head, span_t* span) {
|
|
rpmalloc_assert(*head == span, "Linked list corrupted");
|
|
span = *head;
|
|
*head = span->next;
|
|
}
|
|
|
|
//! Remove a span from double linked list
|
|
static void
|
|
_rpmalloc_span_double_link_list_remove(span_t** head, span_t* span) {
|
|
rpmalloc_assert(*head, "Linked list corrupted");
|
|
if (*head == span) {
|
|
*head = span->next;
|
|
} else {
|
|
span_t* next_span = span->next;
|
|
span_t* prev_span = span->prev;
|
|
prev_span->next = next_span;
|
|
if (EXPECTED(next_span != 0))
|
|
next_span->prev = prev_span;
|
|
}
|
|
}
|
|
|
|
|
|
////////////
|
|
///
|
|
/// Span control
|
|
///
|
|
//////
|
|
|
|
static void
|
|
_rpmalloc_heap_cache_insert(heap_t* heap, span_t* span);
|
|
|
|
static void
|
|
_rpmalloc_heap_finalize(heap_t* heap);
|
|
|
|
static void
|
|
_rpmalloc_heap_set_reserved_spans(heap_t* heap, span_t* master, span_t* reserve, size_t reserve_span_count);
|
|
|
|
//! Declare the span to be a subspan and store distance from master span and span count
|
|
static void
|
|
_rpmalloc_span_mark_as_subspan_unless_master(span_t* master, span_t* subspan, size_t span_count) {
|
|
rpmalloc_assert((subspan != master) || (subspan->flags & SPAN_FLAG_MASTER), "Span master pointer and/or flag mismatch");
|
|
if (subspan != master) {
|
|
subspan->flags = SPAN_FLAG_SUBSPAN;
|
|
subspan->offset_from_master = (uint32_t)((uintptr_t)pointer_diff(subspan, master) >> _memory_span_size_shift);
|
|
subspan->align_offset = 0;
|
|
}
|
|
subspan->span_count = (uint32_t)span_count;
|
|
}
|
|
|
|
//! Use reserved spans to fulfill a memory map request (reserve size must be checked by caller)
|
|
static span_t*
|
|
_rpmalloc_span_map_from_reserve(heap_t* heap, size_t span_count) {
|
|
//Update the heap span reserve
|
|
span_t* span = heap->span_reserve;
|
|
heap->span_reserve = (span_t*)pointer_offset(span, span_count * _memory_span_size);
|
|
heap->spans_reserved -= (uint32_t)span_count;
|
|
|
|
_rpmalloc_span_mark_as_subspan_unless_master(heap->span_reserve_master, span, span_count);
|
|
if (span_count <= LARGE_CLASS_COUNT)
|
|
_rpmalloc_stat_inc(&heap->span_use[span_count - 1].spans_from_reserved);
|
|
|
|
return span;
|
|
}
|
|
|
|
//! Get the aligned number of spans to map in based on wanted count, configured mapping granularity and the page size
|
|
static size_t
|
|
_rpmalloc_span_align_count(size_t span_count) {
|
|
size_t request_count = (span_count > _memory_span_map_count) ? span_count : _memory_span_map_count;
|
|
if ((_memory_page_size > _memory_span_size) && ((request_count * _memory_span_size) % _memory_page_size))
|
|
request_count += _memory_span_map_count - (request_count % _memory_span_map_count);
|
|
return request_count;
|
|
}
|
|
|
|
//! Setup a newly mapped span
|
|
static void
|
|
_rpmalloc_span_initialize(span_t* span, size_t total_span_count, size_t span_count, size_t align_offset) {
|
|
span->total_spans = (uint32_t)total_span_count;
|
|
span->span_count = (uint32_t)span_count;
|
|
span->align_offset = (uint32_t)align_offset;
|
|
span->flags = SPAN_FLAG_MASTER;
|
|
atomic_store32(&span->remaining_spans, (int32_t)total_span_count);
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_span_unmap(span_t* span);
|
|
|
|
//! Map an aligned set of spans, taking configured mapping granularity and the page size into account
|
|
static span_t*
|
|
_rpmalloc_span_map_aligned_count(heap_t* heap, size_t span_count) {
|
|
//If we already have some, but not enough, reserved spans, release those to heap cache and map a new
|
|
//full set of spans. Otherwise we would waste memory if page size > span size (huge pages)
|
|
size_t aligned_span_count = _rpmalloc_span_align_count(span_count);
|
|
size_t align_offset = 0;
|
|
span_t* span = (span_t*)_rpmalloc_mmap(aligned_span_count * _memory_span_size, &align_offset);
|
|
if (!span)
|
|
return 0;
|
|
_rpmalloc_span_initialize(span, aligned_span_count, span_count, align_offset);
|
|
_rpmalloc_stat_inc(&_master_spans);
|
|
if (span_count <= LARGE_CLASS_COUNT)
|
|
_rpmalloc_stat_inc(&heap->span_use[span_count - 1].spans_map_calls);
|
|
if (aligned_span_count > span_count) {
|
|
span_t* reserved_spans = (span_t*)pointer_offset(span, span_count * _memory_span_size);
|
|
size_t reserved_count = aligned_span_count - span_count;
|
|
if (heap->spans_reserved) {
|
|
_rpmalloc_span_mark_as_subspan_unless_master(heap->span_reserve_master, heap->span_reserve, heap->spans_reserved);
|
|
_rpmalloc_heap_cache_insert(heap, heap->span_reserve);
|
|
}
|
|
if (reserved_count > _memory_heap_reserve_count) {
|
|
// If huge pages or eager spam map count, the global reserve spin lock is held by caller, _rpmalloc_span_map
|
|
rpmalloc_assert(atomic_load32(&_memory_global_lock) == 1, "Global spin lock not held as expected");
|
|
size_t remain_count = reserved_count - _memory_heap_reserve_count;
|
|
reserved_count = _memory_heap_reserve_count;
|
|
span_t* remain_span = (span_t*)pointer_offset(reserved_spans, reserved_count * _memory_span_size);
|
|
if (_memory_global_reserve) {
|
|
_rpmalloc_span_mark_as_subspan_unless_master(_memory_global_reserve_master, _memory_global_reserve, _memory_global_reserve_count);
|
|
_rpmalloc_span_unmap(_memory_global_reserve);
|
|
}
|
|
_rpmalloc_global_set_reserved_spans(span, remain_span, remain_count);
|
|
}
|
|
_rpmalloc_heap_set_reserved_spans(heap, span, reserved_spans, reserved_count);
|
|
}
|
|
return span;
|
|
}
|
|
|
|
//! Map in memory pages for the given number of spans (or use previously reserved pages)
|
|
static span_t*
|
|
_rpmalloc_span_map(heap_t* heap, size_t span_count) {
|
|
if (span_count <= heap->spans_reserved)
|
|
return _rpmalloc_span_map_from_reserve(heap, span_count);
|
|
span_t* span = 0;
|
|
int use_global_reserve = (_memory_page_size > _memory_span_size) || (_memory_span_map_count > _memory_heap_reserve_count);
|
|
if (use_global_reserve) {
|
|
// If huge pages, make sure only one thread maps more memory to avoid bloat
|
|
while (!atomic_cas32_acquire(&_memory_global_lock, 1, 0))
|
|
_rpmalloc_spin();
|
|
if (_memory_global_reserve_count >= span_count) {
|
|
size_t reserve_count = (!heap->spans_reserved ? _memory_heap_reserve_count : span_count);
|
|
if (_memory_global_reserve_count < reserve_count)
|
|
reserve_count = _memory_global_reserve_count;
|
|
span = _rpmalloc_global_get_reserved_spans(reserve_count);
|
|
if (span) {
|
|
if (reserve_count > span_count) {
|
|
span_t* reserved_span = (span_t*)pointer_offset(span, span_count << _memory_span_size_shift);
|
|
_rpmalloc_heap_set_reserved_spans(heap, _memory_global_reserve_master, reserved_span, reserve_count - span_count);
|
|
}
|
|
// Already marked as subspan in _rpmalloc_global_get_reserved_spans
|
|
span->span_count = (uint32_t)span_count;
|
|
}
|
|
}
|
|
}
|
|
if (!span)
|
|
span = _rpmalloc_span_map_aligned_count(heap, span_count);
|
|
if (use_global_reserve)
|
|
atomic_store32_release(&_memory_global_lock, 0);
|
|
return span;
|
|
}
|
|
|
|
//! Unmap memory pages for the given number of spans (or mark as unused if no partial unmappings)
|
|
static void
|
|
_rpmalloc_span_unmap(span_t* span) {
|
|
rpmalloc_assert((span->flags & SPAN_FLAG_MASTER) || (span->flags & SPAN_FLAG_SUBSPAN), "Span flag corrupted");
|
|
rpmalloc_assert(!(span->flags & SPAN_FLAG_MASTER) || !(span->flags & SPAN_FLAG_SUBSPAN), "Span flag corrupted");
|
|
|
|
int is_master = !!(span->flags & SPAN_FLAG_MASTER);
|
|
span_t* master = is_master ? span : ((span_t*)pointer_offset(span, -(intptr_t)((uintptr_t)span->offset_from_master * _memory_span_size)));
|
|
rpmalloc_assert(is_master || (span->flags & SPAN_FLAG_SUBSPAN), "Span flag corrupted");
|
|
rpmalloc_assert(master->flags & SPAN_FLAG_MASTER, "Span flag corrupted");
|
|
|
|
size_t span_count = span->span_count;
|
|
if (!is_master) {
|
|
//Directly unmap subspans (unless huge pages, in which case we defer and unmap entire page range with master)
|
|
rpmalloc_assert(span->align_offset == 0, "Span align offset corrupted");
|
|
if (_memory_span_size >= _memory_page_size)
|
|
_rpmalloc_unmap(span, span_count * _memory_span_size, 0, 0);
|
|
} else {
|
|
//Special double flag to denote an unmapped master
|
|
//It must be kept in memory since span header must be used
|
|
span->flags |= SPAN_FLAG_MASTER | SPAN_FLAG_SUBSPAN | SPAN_FLAG_UNMAPPED_MASTER;
|
|
_rpmalloc_stat_add(&_unmapped_master_spans, 1);
|
|
}
|
|
|
|
if (atomic_add32(&master->remaining_spans, -(int32_t)span_count) <= 0) {
|
|
//Everything unmapped, unmap the master span with release flag to unmap the entire range of the super span
|
|
rpmalloc_assert(!!(master->flags & SPAN_FLAG_MASTER) && !!(master->flags & SPAN_FLAG_SUBSPAN), "Span flag corrupted");
|
|
size_t unmap_count = master->span_count;
|
|
if (_memory_span_size < _memory_page_size)
|
|
unmap_count = master->total_spans;
|
|
_rpmalloc_stat_sub(&_master_spans, 1);
|
|
_rpmalloc_stat_sub(&_unmapped_master_spans, 1);
|
|
_rpmalloc_unmap(master, unmap_count * _memory_span_size, master->align_offset, (size_t)master->total_spans * _memory_span_size);
|
|
}
|
|
}
|
|
|
|
//! Move the span (used for small or medium allocations) to the heap thread cache
|
|
static void
|
|
_rpmalloc_span_release_to_cache(heap_t* heap, span_t* span) {
|
|
rpmalloc_assert(heap == span->heap, "Span heap pointer corrupted");
|
|
rpmalloc_assert(span->size_class < SIZE_CLASS_COUNT, "Invalid span size class");
|
|
rpmalloc_assert(span->span_count == 1, "Invalid span count");
|
|
#if ENABLE_ADAPTIVE_THREAD_CACHE || ENABLE_STATISTICS
|
|
atomic_decr32(&heap->span_use[0].current);
|
|
#endif
|
|
_rpmalloc_stat_dec(&heap->size_class_use[span->size_class].spans_current);
|
|
if (!heap->finalize) {
|
|
_rpmalloc_stat_inc(&heap->span_use[0].spans_to_cache);
|
|
_rpmalloc_stat_inc(&heap->size_class_use[span->size_class].spans_to_cache);
|
|
if (heap->size_class[span->size_class].cache)
|
|
_rpmalloc_heap_cache_insert(heap, heap->size_class[span->size_class].cache);
|
|
heap->size_class[span->size_class].cache = span;
|
|
} else {
|
|
_rpmalloc_span_unmap(span);
|
|
}
|
|
}
|
|
|
|
//! Initialize a (partial) free list up to next system memory page, while reserving the first block
|
|
//! as allocated, returning number of blocks in list
|
|
static uint32_t
|
|
free_list_partial_init(void** list, void** first_block, void* page_start, void* block_start, uint32_t block_count, uint32_t block_size) {
|
|
rpmalloc_assert(block_count, "Internal failure");
|
|
*first_block = block_start;
|
|
if (block_count > 1) {
|
|
void* free_block = pointer_offset(block_start, block_size);
|
|
void* block_end = pointer_offset(block_start, (size_t)block_size * block_count);
|
|
//If block size is less than half a memory page, bound init to next memory page boundary
|
|
if (block_size < (_memory_page_size >> 1)) {
|
|
void* page_end = pointer_offset(page_start, _memory_page_size);
|
|
if (page_end < block_end)
|
|
block_end = page_end;
|
|
}
|
|
*list = free_block;
|
|
block_count = 2;
|
|
void* next_block = pointer_offset(free_block, block_size);
|
|
while (next_block < block_end) {
|
|
*((void**)free_block) = next_block;
|
|
free_block = next_block;
|
|
++block_count;
|
|
next_block = pointer_offset(next_block, block_size);
|
|
}
|
|
*((void**)free_block) = 0;
|
|
} else {
|
|
*list = 0;
|
|
}
|
|
return block_count;
|
|
}
|
|
|
|
//! Initialize an unused span (from cache or mapped) to be new active span, putting the initial free list in heap class free list
|
|
static void*
|
|
_rpmalloc_span_initialize_new(heap_t* heap, heap_size_class_t* heap_size_class, span_t* span, uint32_t class_idx) {
|
|
rpmalloc_assert(span->span_count == 1, "Internal failure");
|
|
size_class_t* size_class = _memory_size_class + class_idx;
|
|
span->size_class = class_idx;
|
|
span->heap = heap;
|
|
span->flags &= ~SPAN_FLAG_ALIGNED_BLOCKS;
|
|
span->block_size = size_class->block_size;
|
|
span->block_count = size_class->block_count;
|
|
span->free_list = 0;
|
|
span->list_size = 0;
|
|
atomic_store_ptr_release(&span->free_list_deferred, 0);
|
|
|
|
//Setup free list. Only initialize one system page worth of free blocks in list
|
|
void* block;
|
|
span->free_list_limit = free_list_partial_init(&heap_size_class->free_list, &block,
|
|
span, pointer_offset(span, SPAN_HEADER_SIZE), size_class->block_count, size_class->block_size);
|
|
//Link span as partial if there remains blocks to be initialized as free list, or full if fully initialized
|
|
if (span->free_list_limit < span->block_count) {
|
|
_rpmalloc_span_double_link_list_add(&heap_size_class->partial_span, span);
|
|
span->used_count = span->free_list_limit;
|
|
} else {
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
_rpmalloc_span_double_link_list_add(&heap->full_span[class_idx], span);
|
|
#endif
|
|
++heap->full_span_count;
|
|
span->used_count = span->block_count;
|
|
}
|
|
return block;
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_span_extract_free_list_deferred(span_t* span) {
|
|
// We need acquire semantics on the CAS operation since we are interested in the list size
|
|
// Refer to _rpmalloc_deallocate_defer_small_or_medium for further comments on this dependency
|
|
do {
|
|
span->free_list = atomic_exchange_ptr_acquire(&span->free_list_deferred, INVALID_POINTER);
|
|
} while (span->free_list == INVALID_POINTER);
|
|
span->used_count -= span->list_size;
|
|
span->list_size = 0;
|
|
atomic_store_ptr_release(&span->free_list_deferred, 0);
|
|
}
|
|
|
|
static int
|
|
_rpmalloc_span_is_fully_utilized(span_t* span) {
|
|
rpmalloc_assert(span->free_list_limit <= span->block_count, "Span free list corrupted");
|
|
return !span->free_list && (span->free_list_limit >= span->block_count);
|
|
}
|
|
|
|
static int
|
|
_rpmalloc_span_finalize(heap_t* heap, size_t iclass, span_t* span, span_t** list_head) {
|
|
void* free_list = heap->size_class[iclass].free_list;
|
|
span_t* class_span = (span_t*)((uintptr_t)free_list & _memory_span_mask);
|
|
if (span == class_span) {
|
|
// Adopt the heap class free list back into the span free list
|
|
void* block = span->free_list;
|
|
void* last_block = 0;
|
|
while (block) {
|
|
last_block = block;
|
|
block = *((void**)block);
|
|
}
|
|
uint32_t free_count = 0;
|
|
block = free_list;
|
|
while (block) {
|
|
++free_count;
|
|
block = *((void**)block);
|
|
}
|
|
if (last_block) {
|
|
*((void**)last_block) = free_list;
|
|
} else {
|
|
span->free_list = free_list;
|
|
}
|
|
heap->size_class[iclass].free_list = 0;
|
|
span->used_count -= free_count;
|
|
}
|
|
//If this assert triggers you have memory leaks
|
|
rpmalloc_assert(span->list_size == span->used_count, "Memory leak detected");
|
|
if (span->list_size == span->used_count) {
|
|
_rpmalloc_stat_dec(&heap->span_use[0].current);
|
|
_rpmalloc_stat_dec(&heap->size_class_use[iclass].spans_current);
|
|
// This function only used for spans in double linked lists
|
|
if (list_head)
|
|
_rpmalloc_span_double_link_list_remove(list_head, span);
|
|
_rpmalloc_span_unmap(span);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
////////////
|
|
///
|
|
/// Global cache
|
|
///
|
|
//////
|
|
|
|
#if ENABLE_GLOBAL_CACHE
|
|
|
|
//! Finalize a global cache
|
|
static void
|
|
_rpmalloc_global_cache_finalize(global_cache_t* cache) {
|
|
while (!atomic_cas32_acquire(&cache->lock, 1, 0))
|
|
_rpmalloc_spin();
|
|
|
|
for (size_t ispan = 0; ispan < cache->count; ++ispan)
|
|
_rpmalloc_span_unmap(cache->span[ispan]);
|
|
cache->count = 0;
|
|
|
|
while (cache->overflow) {
|
|
span_t* span = cache->overflow;
|
|
cache->overflow = span->next;
|
|
_rpmalloc_span_unmap(span);
|
|
}
|
|
|
|
atomic_store32_release(&cache->lock, 0);
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_global_cache_insert_spans(span_t** span, size_t span_count, size_t count) {
|
|
const size_t cache_limit = (span_count == 1) ?
|
|
GLOBAL_CACHE_MULTIPLIER * MAX_THREAD_SPAN_CACHE :
|
|
GLOBAL_CACHE_MULTIPLIER * (MAX_THREAD_SPAN_LARGE_CACHE - (span_count >> 1));
|
|
|
|
global_cache_t* cache = &_memory_span_cache[span_count - 1];
|
|
|
|
size_t insert_count = count;
|
|
while (!atomic_cas32_acquire(&cache->lock, 1, 0))
|
|
_rpmalloc_spin();
|
|
|
|
#if ENABLE_STATISTICS
|
|
cache->insert_count += count;
|
|
#endif
|
|
if ((cache->count + insert_count) > cache_limit)
|
|
insert_count = cache_limit - cache->count;
|
|
|
|
memcpy(cache->span + cache->count, span, sizeof(span_t*) * insert_count);
|
|
cache->count += (uint32_t)insert_count;
|
|
|
|
#if ENABLE_UNLIMITED_CACHE
|
|
while (insert_count < count) {
|
|
#else
|
|
// Enable unlimited cache if huge pages, or we will leak since it is unlikely that an entire huge page
|
|
// will be unmapped, and we're unable to partially decommit a huge page
|
|
while ((_memory_page_size > _memory_span_size) && (insert_count < count)) {
|
|
#endif
|
|
span_t* current_span = span[insert_count++];
|
|
current_span->next = cache->overflow;
|
|
cache->overflow = current_span;
|
|
}
|
|
atomic_store32_release(&cache->lock, 0);
|
|
|
|
span_t* keep = 0;
|
|
for (size_t ispan = insert_count; ispan < count; ++ispan) {
|
|
span_t* current_span = span[ispan];
|
|
// Keep master spans that has remaining subspans to avoid dangling them
|
|
if ((current_span->flags & SPAN_FLAG_MASTER) &&
|
|
(atomic_load32(¤t_span->remaining_spans) > (int32_t)current_span->span_count)) {
|
|
current_span->next = keep;
|
|
keep = current_span;
|
|
} else {
|
|
_rpmalloc_span_unmap(current_span);
|
|
}
|
|
}
|
|
|
|
if (keep) {
|
|
while (!atomic_cas32_acquire(&cache->lock, 1, 0))
|
|
_rpmalloc_spin();
|
|
|
|
size_t islot = 0;
|
|
while (keep) {
|
|
for (; islot < cache->count; ++islot) {
|
|
span_t* current_span = cache->span[islot];
|
|
if (!(current_span->flags & SPAN_FLAG_MASTER) || ((current_span->flags & SPAN_FLAG_MASTER) &&
|
|
(atomic_load32(¤t_span->remaining_spans) <= (int32_t)current_span->span_count))) {
|
|
_rpmalloc_span_unmap(current_span);
|
|
cache->span[islot] = keep;
|
|
break;
|
|
}
|
|
}
|
|
if (islot == cache->count)
|
|
break;
|
|
keep = keep->next;
|
|
}
|
|
|
|
if (keep) {
|
|
span_t* tail = keep;
|
|
while (tail->next)
|
|
tail = tail->next;
|
|
tail->next = cache->overflow;
|
|
cache->overflow = keep;
|
|
}
|
|
|
|
atomic_store32_release(&cache->lock, 0);
|
|
}
|
|
}
|
|
|
|
static size_t
|
|
_rpmalloc_global_cache_extract_spans(span_t** span, size_t span_count, size_t count) {
|
|
global_cache_t* cache = &_memory_span_cache[span_count - 1];
|
|
|
|
size_t extract_count = 0;
|
|
while (!atomic_cas32_acquire(&cache->lock, 1, 0))
|
|
_rpmalloc_spin();
|
|
|
|
#if ENABLE_STATISTICS
|
|
cache->extract_count += count;
|
|
#endif
|
|
size_t want = count - extract_count;
|
|
if (want > cache->count)
|
|
want = cache->count;
|
|
|
|
memcpy(span + extract_count, cache->span + (cache->count - want), sizeof(span_t*) * want);
|
|
cache->count -= (uint32_t)want;
|
|
extract_count += want;
|
|
|
|
while ((extract_count < count) && cache->overflow) {
|
|
span_t* current_span = cache->overflow;
|
|
span[extract_count++] = current_span;
|
|
cache->overflow = current_span->next;
|
|
}
|
|
|
|
#if ENABLE_ASSERTS
|
|
for (size_t ispan = 0; ispan < extract_count; ++ispan) {
|
|
assert(span[ispan]->span_count == span_count);
|
|
}
|
|
#endif
|
|
|
|
atomic_store32_release(&cache->lock, 0);
|
|
|
|
return extract_count;
|
|
}
|
|
|
|
#endif
|
|
|
|
////////////
|
|
///
|
|
/// Heap control
|
|
///
|
|
//////
|
|
|
|
static void _rpmalloc_deallocate_huge(span_t*);
|
|
|
|
//! Store the given spans as reserve in the given heap
|
|
static void
|
|
_rpmalloc_heap_set_reserved_spans(heap_t* heap, span_t* master, span_t* reserve, size_t reserve_span_count) {
|
|
heap->span_reserve_master = master;
|
|
heap->span_reserve = reserve;
|
|
heap->spans_reserved = (uint32_t)reserve_span_count;
|
|
}
|
|
|
|
//! Adopt the deferred span cache list, optionally extracting the first single span for immediate re-use
|
|
static void
|
|
_rpmalloc_heap_cache_adopt_deferred(heap_t* heap, span_t** single_span) {
|
|
span_t* span = (span_t*)((void*)atomic_exchange_ptr_acquire(&heap->span_free_deferred, 0));
|
|
while (span) {
|
|
span_t* next_span = (span_t*)span->free_list;
|
|
rpmalloc_assert(span->heap == heap, "Span heap pointer corrupted");
|
|
if (EXPECTED(span->size_class < SIZE_CLASS_COUNT)) {
|
|
rpmalloc_assert(heap->full_span_count, "Heap span counter corrupted");
|
|
--heap->full_span_count;
|
|
_rpmalloc_stat_dec(&heap->span_use[0].spans_deferred);
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
_rpmalloc_span_double_link_list_remove(&heap->full_span[span->size_class], span);
|
|
#endif
|
|
_rpmalloc_stat_dec(&heap->span_use[0].current);
|
|
_rpmalloc_stat_dec(&heap->size_class_use[span->size_class].spans_current);
|
|
if (single_span && !*single_span)
|
|
*single_span = span;
|
|
else
|
|
_rpmalloc_heap_cache_insert(heap, span);
|
|
} else {
|
|
if (span->size_class == SIZE_CLASS_HUGE) {
|
|
_rpmalloc_deallocate_huge(span);
|
|
} else {
|
|
rpmalloc_assert(span->size_class == SIZE_CLASS_LARGE, "Span size class invalid");
|
|
rpmalloc_assert(heap->full_span_count, "Heap span counter corrupted");
|
|
--heap->full_span_count;
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
_rpmalloc_span_double_link_list_remove(&heap->large_huge_span, span);
|
|
#endif
|
|
uint32_t idx = span->span_count - 1;
|
|
_rpmalloc_stat_dec(&heap->span_use[idx].spans_deferred);
|
|
_rpmalloc_stat_dec(&heap->span_use[idx].current);
|
|
if (!idx && single_span && !*single_span)
|
|
*single_span = span;
|
|
else
|
|
_rpmalloc_heap_cache_insert(heap, span);
|
|
}
|
|
}
|
|
span = next_span;
|
|
}
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_heap_unmap(heap_t* heap) {
|
|
if (!heap->master_heap) {
|
|
if ((heap->finalize > 1) && !atomic_load32(&heap->child_count)) {
|
|
span_t* span = (span_t*)((uintptr_t)heap & _memory_span_mask);
|
|
_rpmalloc_span_unmap(span);
|
|
}
|
|
} else {
|
|
if (atomic_decr32(&heap->master_heap->child_count) == 0) {
|
|
_rpmalloc_heap_unmap(heap->master_heap);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_heap_global_finalize(heap_t* heap) {
|
|
if (heap->finalize++ > 1) {
|
|
--heap->finalize;
|
|
return;
|
|
}
|
|
|
|
_rpmalloc_heap_finalize(heap);
|
|
|
|
#if ENABLE_THREAD_CACHE
|
|
for (size_t iclass = 0; iclass < LARGE_CLASS_COUNT; ++iclass) {
|
|
span_cache_t* span_cache;
|
|
if (!iclass)
|
|
span_cache = &heap->span_cache;
|
|
else
|
|
span_cache = (span_cache_t*)(heap->span_large_cache + (iclass - 1));
|
|
for (size_t ispan = 0; ispan < span_cache->count; ++ispan)
|
|
_rpmalloc_span_unmap(span_cache->span[ispan]);
|
|
span_cache->count = 0;
|
|
}
|
|
#endif
|
|
|
|
if (heap->full_span_count) {
|
|
--heap->finalize;
|
|
return;
|
|
}
|
|
|
|
for (size_t iclass = 0; iclass < SIZE_CLASS_COUNT; ++iclass) {
|
|
if (heap->size_class[iclass].free_list || heap->size_class[iclass].partial_span) {
|
|
--heap->finalize;
|
|
return;
|
|
}
|
|
}
|
|
//Heap is now completely free, unmap and remove from heap list
|
|
size_t list_idx = (size_t)heap->id % HEAP_ARRAY_SIZE;
|
|
heap_t* list_heap = _memory_heaps[list_idx];
|
|
if (list_heap == heap) {
|
|
_memory_heaps[list_idx] = heap->next_heap;
|
|
} else {
|
|
while (list_heap->next_heap != heap)
|
|
list_heap = list_heap->next_heap;
|
|
list_heap->next_heap = heap->next_heap;
|
|
}
|
|
|
|
_rpmalloc_heap_unmap(heap);
|
|
}
|
|
|
|
//! Insert a single span into thread heap cache, releasing to global cache if overflow
|
|
static void
|
|
_rpmalloc_heap_cache_insert(heap_t* heap, span_t* span) {
|
|
if (UNEXPECTED(heap->finalize != 0)) {
|
|
_rpmalloc_span_unmap(span);
|
|
_rpmalloc_heap_global_finalize(heap);
|
|
return;
|
|
}
|
|
#if ENABLE_THREAD_CACHE
|
|
size_t span_count = span->span_count;
|
|
_rpmalloc_stat_inc(&heap->span_use[span_count - 1].spans_to_cache);
|
|
if (span_count == 1) {
|
|
span_cache_t* span_cache = &heap->span_cache;
|
|
span_cache->span[span_cache->count++] = span;
|
|
if (span_cache->count == MAX_THREAD_SPAN_CACHE) {
|
|
const size_t remain_count = MAX_THREAD_SPAN_CACHE - THREAD_SPAN_CACHE_TRANSFER;
|
|
#if ENABLE_GLOBAL_CACHE
|
|
_rpmalloc_stat_add64(&heap->thread_to_global, THREAD_SPAN_CACHE_TRANSFER * _memory_span_size);
|
|
_rpmalloc_stat_add(&heap->span_use[span_count - 1].spans_to_global, THREAD_SPAN_CACHE_TRANSFER);
|
|
_rpmalloc_global_cache_insert_spans(span_cache->span + remain_count, span_count, THREAD_SPAN_CACHE_TRANSFER);
|
|
#else
|
|
for (size_t ispan = 0; ispan < THREAD_SPAN_CACHE_TRANSFER; ++ispan)
|
|
_rpmalloc_span_unmap(span_cache->span[remain_count + ispan]);
|
|
#endif
|
|
span_cache->count = remain_count;
|
|
}
|
|
} else {
|
|
size_t cache_idx = span_count - 2;
|
|
span_large_cache_t* span_cache = heap->span_large_cache + cache_idx;
|
|
span_cache->span[span_cache->count++] = span;
|
|
const size_t cache_limit = (MAX_THREAD_SPAN_LARGE_CACHE - (span_count >> 1));
|
|
if (span_cache->count == cache_limit) {
|
|
const size_t transfer_limit = 2 + (cache_limit >> 2);
|
|
const size_t transfer_count = (THREAD_SPAN_LARGE_CACHE_TRANSFER <= transfer_limit ? THREAD_SPAN_LARGE_CACHE_TRANSFER : transfer_limit);
|
|
const size_t remain_count = cache_limit - transfer_count;
|
|
#if ENABLE_GLOBAL_CACHE
|
|
_rpmalloc_stat_add64(&heap->thread_to_global, transfer_count * span_count * _memory_span_size);
|
|
_rpmalloc_stat_add(&heap->span_use[span_count - 1].spans_to_global, transfer_count);
|
|
_rpmalloc_global_cache_insert_spans(span_cache->span + remain_count, span_count, transfer_count);
|
|
#else
|
|
for (size_t ispan = 0; ispan < transfer_count; ++ispan)
|
|
_rpmalloc_span_unmap(span_cache->span[remain_count + ispan]);
|
|
#endif
|
|
span_cache->count = remain_count;
|
|
}
|
|
}
|
|
#else
|
|
(void)sizeof(heap);
|
|
_rpmalloc_span_unmap(span);
|
|
#endif
|
|
}
|
|
|
|
//! Extract the given number of spans from the different cache levels
|
|
static span_t*
|
|
_rpmalloc_heap_thread_cache_extract(heap_t* heap, size_t span_count) {
|
|
span_t* span = 0;
|
|
#if ENABLE_THREAD_CACHE
|
|
span_cache_t* span_cache;
|
|
if (span_count == 1)
|
|
span_cache = &heap->span_cache;
|
|
else
|
|
span_cache = (span_cache_t*)(heap->span_large_cache + (span_count - 2));
|
|
if (span_cache->count) {
|
|
_rpmalloc_stat_inc(&heap->span_use[span_count - 1].spans_from_cache);
|
|
return span_cache->span[--span_cache->count];
|
|
}
|
|
#endif
|
|
return span;
|
|
}
|
|
|
|
static span_t*
|
|
_rpmalloc_heap_thread_cache_deferred_extract(heap_t* heap, size_t span_count) {
|
|
span_t* span = 0;
|
|
if (span_count == 1) {
|
|
_rpmalloc_heap_cache_adopt_deferred(heap, &span);
|
|
} else {
|
|
_rpmalloc_heap_cache_adopt_deferred(heap, 0);
|
|
span = _rpmalloc_heap_thread_cache_extract(heap, span_count);
|
|
}
|
|
return span;
|
|
}
|
|
|
|
static span_t*
|
|
_rpmalloc_heap_reserved_extract(heap_t* heap, size_t span_count) {
|
|
if (heap->spans_reserved >= span_count)
|
|
return _rpmalloc_span_map(heap, span_count);
|
|
return 0;
|
|
}
|
|
|
|
//! Extract a span from the global cache
|
|
static span_t*
|
|
_rpmalloc_heap_global_cache_extract(heap_t* heap, size_t span_count) {
|
|
#if ENABLE_GLOBAL_CACHE
|
|
#if ENABLE_THREAD_CACHE
|
|
span_cache_t* span_cache;
|
|
size_t wanted_count;
|
|
if (span_count == 1) {
|
|
span_cache = &heap->span_cache;
|
|
wanted_count = THREAD_SPAN_CACHE_TRANSFER;
|
|
} else {
|
|
span_cache = (span_cache_t*)(heap->span_large_cache + (span_count - 2));
|
|
wanted_count = THREAD_SPAN_LARGE_CACHE_TRANSFER;
|
|
}
|
|
span_cache->count = _rpmalloc_global_cache_extract_spans(span_cache->span, span_count, wanted_count);
|
|
if (span_cache->count) {
|
|
_rpmalloc_stat_add64(&heap->global_to_thread, span_count * span_cache->count * _memory_span_size);
|
|
_rpmalloc_stat_add(&heap->span_use[span_count - 1].spans_from_global, span_cache->count);
|
|
return span_cache->span[--span_cache->count];
|
|
}
|
|
#else
|
|
span_t* span = 0;
|
|
size_t count = _rpmalloc_global_cache_extract_spans(&span, span_count, 1);
|
|
if (count) {
|
|
_rpmalloc_stat_add64(&heap->global_to_thread, span_count * count * _memory_span_size);
|
|
_rpmalloc_stat_add(&heap->span_use[span_count - 1].spans_from_global, count);
|
|
return span;
|
|
}
|
|
#endif
|
|
#endif
|
|
(void)sizeof(heap);
|
|
(void)sizeof(span_count);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_inc_span_statistics(heap_t* heap, size_t span_count, uint32_t class_idx) {
|
|
(void)sizeof(heap);
|
|
(void)sizeof(span_count);
|
|
(void)sizeof(class_idx);
|
|
#if ENABLE_ADAPTIVE_THREAD_CACHE || ENABLE_STATISTICS
|
|
uint32_t idx = (uint32_t)span_count - 1;
|
|
uint32_t current_count = (uint32_t)atomic_incr32(&heap->span_use[idx].current);
|
|
if (current_count > (uint32_t)atomic_load32(&heap->span_use[idx].high))
|
|
atomic_store32(&heap->span_use[idx].high, (int32_t)current_count);
|
|
_rpmalloc_stat_add_peak(&heap->size_class_use[class_idx].spans_current, 1, heap->size_class_use[class_idx].spans_peak);
|
|
#endif
|
|
}
|
|
|
|
//! Get a span from one of the cache levels (thread cache, reserved, global cache) or fallback to mapping more memory
|
|
static span_t*
|
|
_rpmalloc_heap_extract_new_span(heap_t* heap, heap_size_class_t* heap_size_class, size_t span_count, uint32_t class_idx) {
|
|
span_t* span;
|
|
#if ENABLE_THREAD_CACHE
|
|
if (heap_size_class && heap_size_class->cache) {
|
|
span = heap_size_class->cache;
|
|
heap_size_class->cache = (heap->span_cache.count ? heap->span_cache.span[--heap->span_cache.count] : 0);
|
|
_rpmalloc_inc_span_statistics(heap, span_count, class_idx);
|
|
return span;
|
|
}
|
|
#endif
|
|
(void)sizeof(class_idx);
|
|
// Allow 50% overhead to increase cache hits
|
|
size_t base_span_count = span_count;
|
|
size_t limit_span_count = (span_count > 2) ? (span_count + (span_count >> 1)) : span_count;
|
|
if (limit_span_count > LARGE_CLASS_COUNT)
|
|
limit_span_count = LARGE_CLASS_COUNT;
|
|
do {
|
|
span = _rpmalloc_heap_thread_cache_extract(heap, span_count);
|
|
if (EXPECTED(span != 0)) {
|
|
_rpmalloc_stat_inc(&heap->size_class_use[class_idx].spans_from_cache);
|
|
_rpmalloc_inc_span_statistics(heap, span_count, class_idx);
|
|
return span;
|
|
}
|
|
span = _rpmalloc_heap_thread_cache_deferred_extract(heap, span_count);
|
|
if (EXPECTED(span != 0)) {
|
|
_rpmalloc_stat_inc(&heap->size_class_use[class_idx].spans_from_cache);
|
|
_rpmalloc_inc_span_statistics(heap, span_count, class_idx);
|
|
return span;
|
|
}
|
|
span = _rpmalloc_heap_reserved_extract(heap, span_count);
|
|
if (EXPECTED(span != 0)) {
|
|
_rpmalloc_stat_inc(&heap->size_class_use[class_idx].spans_from_reserved);
|
|
_rpmalloc_inc_span_statistics(heap, span_count, class_idx);
|
|
return span;
|
|
}
|
|
span = _rpmalloc_heap_global_cache_extract(heap, span_count);
|
|
if (EXPECTED(span != 0)) {
|
|
_rpmalloc_stat_inc(&heap->size_class_use[class_idx].spans_from_cache);
|
|
_rpmalloc_inc_span_statistics(heap, span_count, class_idx);
|
|
return span;
|
|
}
|
|
++span_count;
|
|
} while (span_count <= limit_span_count);
|
|
//Final fallback, map in more virtual memory
|
|
span = _rpmalloc_span_map(heap, base_span_count);
|
|
_rpmalloc_inc_span_statistics(heap, base_span_count, class_idx);
|
|
_rpmalloc_stat_inc(&heap->size_class_use[class_idx].spans_map_calls);
|
|
return span;
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_heap_initialize(heap_t* heap) {
|
|
memset((void*)heap, 0, sizeof(heap_t));
|
|
//Get a new heap ID
|
|
heap->id = 1 + atomic_incr32(&_memory_heap_id);
|
|
|
|
//Link in heap in heap ID map
|
|
size_t list_idx = (size_t)heap->id % HEAP_ARRAY_SIZE;
|
|
heap->next_heap = _memory_heaps[list_idx];
|
|
_memory_heaps[list_idx] = heap;
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_heap_orphan(heap_t* heap, int first_class) {
|
|
heap->owner_thread = (uintptr_t)-1;
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
heap_t** heap_list = (first_class ? &_memory_first_class_orphan_heaps : &_memory_orphan_heaps);
|
|
#else
|
|
(void)sizeof(first_class);
|
|
heap_t** heap_list = &_memory_orphan_heaps;
|
|
#endif
|
|
heap->next_orphan = *heap_list;
|
|
*heap_list = heap;
|
|
}
|
|
|
|
//! Allocate a new heap from newly mapped memory pages
|
|
static heap_t*
|
|
_rpmalloc_heap_allocate_new(void) {
|
|
// Map in pages for a 16 heaps. If page size is greater than required size for this, map a page and
|
|
// use first part for heaps and remaining part for spans for allocations. Adds a lot of complexity,
|
|
// but saves a lot of memory on systems where page size > 64 spans (4MiB)
|
|
size_t heap_size = sizeof(heap_t);
|
|
size_t aligned_heap_size = 16 * ((heap_size + 15) / 16);
|
|
size_t request_heap_count = 16;
|
|
size_t heap_span_count = ((aligned_heap_size * request_heap_count) + sizeof(span_t) + _memory_span_size - 1) / _memory_span_size;
|
|
size_t block_size = _memory_span_size * heap_span_count;
|
|
size_t span_count = heap_span_count;
|
|
span_t* span = 0;
|
|
// If there are global reserved spans, use these first
|
|
if (_memory_global_reserve_count >= heap_span_count) {
|
|
span = _rpmalloc_global_get_reserved_spans(heap_span_count);
|
|
}
|
|
if (!span) {
|
|
if (_memory_page_size > block_size) {
|
|
span_count = _memory_page_size / _memory_span_size;
|
|
block_size = _memory_page_size;
|
|
// If using huge pages, make sure to grab enough heaps to avoid reallocating a huge page just to serve new heaps
|
|
size_t possible_heap_count = (block_size - sizeof(span_t)) / aligned_heap_size;
|
|
if (possible_heap_count >= (request_heap_count * 16))
|
|
request_heap_count *= 16;
|
|
else if (possible_heap_count < request_heap_count)
|
|
request_heap_count = possible_heap_count;
|
|
heap_span_count = ((aligned_heap_size * request_heap_count) + sizeof(span_t) + _memory_span_size - 1) / _memory_span_size;
|
|
}
|
|
|
|
size_t align_offset = 0;
|
|
span = (span_t*)_rpmalloc_mmap(block_size, &align_offset);
|
|
if (!span)
|
|
return 0;
|
|
|
|
// Master span will contain the heaps
|
|
_rpmalloc_stat_inc(&_master_spans);
|
|
_rpmalloc_span_initialize(span, span_count, heap_span_count, align_offset);
|
|
}
|
|
|
|
size_t remain_size = _memory_span_size - sizeof(span_t);
|
|
heap_t* heap = (heap_t*)pointer_offset(span, sizeof(span_t));
|
|
_rpmalloc_heap_initialize(heap);
|
|
|
|
// Put extra heaps as orphans
|
|
size_t num_heaps = remain_size / aligned_heap_size;
|
|
if (num_heaps < request_heap_count)
|
|
num_heaps = request_heap_count;
|
|
atomic_store32(&heap->child_count, (int32_t)num_heaps - 1);
|
|
heap_t* extra_heap = (heap_t*)pointer_offset(heap, aligned_heap_size);
|
|
while (num_heaps > 1) {
|
|
_rpmalloc_heap_initialize(extra_heap);
|
|
extra_heap->master_heap = heap;
|
|
_rpmalloc_heap_orphan(extra_heap, 1);
|
|
extra_heap = (heap_t*)pointer_offset(extra_heap, aligned_heap_size);
|
|
--num_heaps;
|
|
}
|
|
|
|
if (span_count > heap_span_count) {
|
|
// Cap reserved spans
|
|
size_t remain_count = span_count - heap_span_count;
|
|
size_t reserve_count = (remain_count > _memory_heap_reserve_count ? _memory_heap_reserve_count : remain_count);
|
|
span_t* remain_span = (span_t*)pointer_offset(span, heap_span_count * _memory_span_size);
|
|
_rpmalloc_heap_set_reserved_spans(heap, span, remain_span, reserve_count);
|
|
|
|
if (remain_count > reserve_count) {
|
|
// Set to global reserved spans
|
|
remain_span = (span_t*)pointer_offset(remain_span, reserve_count * _memory_span_size);
|
|
reserve_count = remain_count - reserve_count;
|
|
_rpmalloc_global_set_reserved_spans(span, remain_span, reserve_count);
|
|
}
|
|
}
|
|
|
|
return heap;
|
|
}
|
|
|
|
static heap_t*
|
|
_rpmalloc_heap_extract_orphan(heap_t** heap_list) {
|
|
heap_t* heap = *heap_list;
|
|
*heap_list = (heap ? heap->next_orphan : 0);
|
|
return heap;
|
|
}
|
|
|
|
//! Allocate a new heap, potentially reusing a previously orphaned heap
|
|
static heap_t*
|
|
_rpmalloc_heap_allocate(int first_class) {
|
|
heap_t* heap = 0;
|
|
while (!atomic_cas32_acquire(&_memory_global_lock, 1, 0))
|
|
_rpmalloc_spin();
|
|
if (first_class == 0)
|
|
heap = _rpmalloc_heap_extract_orphan(&_memory_orphan_heaps);
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
if (!heap)
|
|
heap = _rpmalloc_heap_extract_orphan(&_memory_first_class_orphan_heaps);
|
|
#endif
|
|
if (!heap)
|
|
heap = _rpmalloc_heap_allocate_new();
|
|
atomic_store32_release(&_memory_global_lock, 0);
|
|
_rpmalloc_heap_cache_adopt_deferred(heap, 0);
|
|
return heap;
|
|
}
|
|
|
|
extern thread_local bool RpThreadShutdown;
|
|
|
|
static void
|
|
_rpmalloc_heap_release(void* heapptr, int first_class, int release_cache) {
|
|
heap_t* heap = (heap_t*)heapptr;
|
|
if (!heap)
|
|
return;
|
|
RpThreadShutdown = true;
|
|
//Release thread cache spans back to global cache
|
|
_rpmalloc_heap_cache_adopt_deferred(heap, 0);
|
|
if (release_cache || heap->finalize) {
|
|
#if ENABLE_THREAD_CACHE
|
|
for (size_t iclass = 0; iclass < LARGE_CLASS_COUNT; ++iclass) {
|
|
span_cache_t* span_cache;
|
|
if (!iclass)
|
|
span_cache = &heap->span_cache;
|
|
else
|
|
span_cache = (span_cache_t*)(heap->span_large_cache + (iclass - 1));
|
|
if (!span_cache->count)
|
|
continue;
|
|
#if ENABLE_GLOBAL_CACHE
|
|
if (heap->finalize) {
|
|
for (size_t ispan = 0; ispan < span_cache->count; ++ispan)
|
|
_rpmalloc_span_unmap(span_cache->span[ispan]);
|
|
} else {
|
|
_rpmalloc_stat_add64(&heap->thread_to_global, span_cache->count * (iclass + 1) * _memory_span_size);
|
|
_rpmalloc_stat_add(&heap->span_use[iclass].spans_to_global, span_cache->count);
|
|
_rpmalloc_global_cache_insert_spans(span_cache->span, iclass + 1, span_cache->count);
|
|
}
|
|
#else
|
|
for (size_t ispan = 0; ispan < span_cache->count; ++ispan)
|
|
_rpmalloc_span_unmap(span_cache->span[ispan]);
|
|
#endif
|
|
span_cache->count = 0;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (get_thread_heap_raw() == heap)
|
|
set_thread_heap(0);
|
|
|
|
#if ENABLE_STATISTICS
|
|
atomic_decr32(&_memory_active_heaps);
|
|
rpmalloc_assert(atomic_load32(&_memory_active_heaps) >= 0, "Still active heaps during finalization");
|
|
#endif
|
|
|
|
// If we are forcibly terminating with _exit the state of the
|
|
// lock atomic is unknown and it's best to just go ahead and exit
|
|
if (get_thread_id() != _rpmalloc_main_thread_id) {
|
|
while (!atomic_cas32_acquire(&_memory_global_lock, 1, 0))
|
|
_rpmalloc_spin();
|
|
}
|
|
_rpmalloc_heap_orphan(heap, first_class);
|
|
atomic_store32_release(&_memory_global_lock, 0);
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_heap_release_raw(void* heapptr, int release_cache) {
|
|
_rpmalloc_heap_release(heapptr, 0, release_cache);
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_heap_release_raw_fc(void* heapptr) {
|
|
_rpmalloc_heap_release_raw(heapptr, 1);
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_heap_finalize(heap_t* heap) {
|
|
if (heap->spans_reserved) {
|
|
span_t* span = _rpmalloc_span_map(heap, heap->spans_reserved);
|
|
_rpmalloc_span_unmap(span);
|
|
heap->spans_reserved = 0;
|
|
}
|
|
|
|
_rpmalloc_heap_cache_adopt_deferred(heap, 0);
|
|
|
|
for (size_t iclass = 0; iclass < SIZE_CLASS_COUNT; ++iclass) {
|
|
if (heap->size_class[iclass].cache)
|
|
_rpmalloc_span_unmap(heap->size_class[iclass].cache);
|
|
heap->size_class[iclass].cache = 0;
|
|
span_t* span = heap->size_class[iclass].partial_span;
|
|
while (span) {
|
|
span_t* next = span->next;
|
|
_rpmalloc_span_finalize(heap, iclass, span, &heap->size_class[iclass].partial_span);
|
|
span = next;
|
|
}
|
|
// If class still has a free list it must be a full span
|
|
if (heap->size_class[iclass].free_list) {
|
|
span_t* class_span = (span_t*)((uintptr_t)heap->size_class[iclass].free_list & _memory_span_mask);
|
|
span_t** list = 0;
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
list = &heap->full_span[iclass];
|
|
#endif
|
|
--heap->full_span_count;
|
|
if (!_rpmalloc_span_finalize(heap, iclass, class_span, list)) {
|
|
if (list)
|
|
_rpmalloc_span_double_link_list_remove(list, class_span);
|
|
_rpmalloc_span_double_link_list_add(&heap->size_class[iclass].partial_span, class_span);
|
|
}
|
|
}
|
|
}
|
|
|
|
#if ENABLE_THREAD_CACHE
|
|
for (size_t iclass = 0; iclass < LARGE_CLASS_COUNT; ++iclass) {
|
|
span_cache_t* span_cache;
|
|
if (!iclass)
|
|
span_cache = &heap->span_cache;
|
|
else
|
|
span_cache = (span_cache_t*)(heap->span_large_cache + (iclass - 1));
|
|
for (size_t ispan = 0; ispan < span_cache->count; ++ispan)
|
|
_rpmalloc_span_unmap(span_cache->span[ispan]);
|
|
span_cache->count = 0;
|
|
}
|
|
#endif
|
|
rpmalloc_assert(!atomic_load_ptr(&heap->span_free_deferred), "Heaps still active during finalization");
|
|
}
|
|
|
|
|
|
////////////
|
|
///
|
|
/// Allocation entry points
|
|
///
|
|
//////
|
|
|
|
//! Pop first block from a free list
|
|
static void*
|
|
free_list_pop(void** list) {
|
|
void* block = *list;
|
|
*list = *((void**)block);
|
|
return block;
|
|
}
|
|
|
|
//! Allocate a small/medium sized memory block from the given heap
|
|
static void*
|
|
_rpmalloc_allocate_from_heap_fallback(heap_t* heap, heap_size_class_t* heap_size_class, uint32_t class_idx) {
|
|
span_t* span = heap_size_class->partial_span;
|
|
if (EXPECTED(span != 0)) {
|
|
rpmalloc_assert(span->block_count == _memory_size_class[span->size_class].block_count, "Span block count corrupted");
|
|
rpmalloc_assert(!_rpmalloc_span_is_fully_utilized(span), "Internal failure");
|
|
void* block;
|
|
if (span->free_list) {
|
|
//Span local free list is not empty, swap to size class free list
|
|
block = free_list_pop(&span->free_list);
|
|
heap_size_class->free_list = span->free_list;
|
|
span->free_list = 0;
|
|
} else {
|
|
//If the span did not fully initialize free list, link up another page worth of blocks
|
|
void* block_start = pointer_offset(span, SPAN_HEADER_SIZE + ((size_t)span->free_list_limit * span->block_size));
|
|
span->free_list_limit += free_list_partial_init(&heap_size_class->free_list, &block,
|
|
(void*)((uintptr_t)block_start & ~(_memory_page_size - 1)), block_start,
|
|
span->block_count - span->free_list_limit, span->block_size);
|
|
}
|
|
rpmalloc_assert(span->free_list_limit <= span->block_count, "Span block count corrupted");
|
|
span->used_count = span->free_list_limit;
|
|
|
|
//Swap in deferred free list if present
|
|
if (atomic_load_ptr(&span->free_list_deferred))
|
|
_rpmalloc_span_extract_free_list_deferred(span);
|
|
|
|
//If span is still not fully utilized keep it in partial list and early return block
|
|
if (!_rpmalloc_span_is_fully_utilized(span))
|
|
return block;
|
|
|
|
//The span is fully utilized, unlink from partial list and add to fully utilized list
|
|
_rpmalloc_span_double_link_list_pop_head(&heap_size_class->partial_span, span);
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
_rpmalloc_span_double_link_list_add(&heap->full_span[class_idx], span);
|
|
#endif
|
|
++heap->full_span_count;
|
|
return block;
|
|
}
|
|
|
|
//Find a span in one of the cache levels
|
|
span = _rpmalloc_heap_extract_new_span(heap, heap_size_class, 1, class_idx);
|
|
if (EXPECTED(span != 0)) {
|
|
//Mark span as owned by this heap and set base data, return first block
|
|
return _rpmalloc_span_initialize_new(heap, heap_size_class, span, class_idx);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
//! Allocate a small sized memory block from the given heap
|
|
static void*
|
|
_rpmalloc_allocate_small(heap_t* heap, size_t size) {
|
|
rpmalloc_assert(heap, "No thread heap");
|
|
//Small sizes have unique size classes
|
|
const uint32_t class_idx = (uint32_t)((size + (SMALL_GRANULARITY - 1)) >> SMALL_GRANULARITY_SHIFT);
|
|
heap_size_class_t* heap_size_class = heap->size_class + class_idx;
|
|
_rpmalloc_stat_inc_alloc(heap, class_idx);
|
|
if (EXPECTED(heap_size_class->free_list != 0))
|
|
return free_list_pop(&heap_size_class->free_list);
|
|
return _rpmalloc_allocate_from_heap_fallback(heap, heap_size_class, class_idx);
|
|
}
|
|
|
|
//! Allocate a medium sized memory block from the given heap
|
|
static void*
|
|
_rpmalloc_allocate_medium(heap_t* heap, size_t size) {
|
|
rpmalloc_assert(heap, "No thread heap");
|
|
//Calculate the size class index and do a dependent lookup of the final class index (in case of merged classes)
|
|
const uint32_t base_idx = (uint32_t)(SMALL_CLASS_COUNT + ((size - (SMALL_SIZE_LIMIT + 1)) >> MEDIUM_GRANULARITY_SHIFT));
|
|
const uint32_t class_idx = _memory_size_class[base_idx].class_idx;
|
|
heap_size_class_t* heap_size_class = heap->size_class + class_idx;
|
|
_rpmalloc_stat_inc_alloc(heap, class_idx);
|
|
if (EXPECTED(heap_size_class->free_list != 0))
|
|
return free_list_pop(&heap_size_class->free_list);
|
|
return _rpmalloc_allocate_from_heap_fallback(heap, heap_size_class, class_idx);
|
|
}
|
|
|
|
//! Allocate a large sized memory block from the given heap
|
|
static void*
|
|
_rpmalloc_allocate_large(heap_t* heap, size_t size) {
|
|
rpmalloc_assert(heap, "No thread heap");
|
|
//Calculate number of needed max sized spans (including header)
|
|
//Since this function is never called if size > LARGE_SIZE_LIMIT
|
|
//the span_count is guaranteed to be <= LARGE_CLASS_COUNT
|
|
size += SPAN_HEADER_SIZE;
|
|
size_t span_count = size >> _memory_span_size_shift;
|
|
if (size & (_memory_span_size - 1))
|
|
++span_count;
|
|
|
|
//Find a span in one of the cache levels
|
|
span_t* span = _rpmalloc_heap_extract_new_span(heap, 0, span_count, SIZE_CLASS_LARGE);
|
|
if (!span)
|
|
return span;
|
|
|
|
//Mark span as owned by this heap and set base data
|
|
rpmalloc_assert(span->span_count >= span_count, "Internal failure");
|
|
span->size_class = SIZE_CLASS_LARGE;
|
|
span->heap = heap;
|
|
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
_rpmalloc_span_double_link_list_add(&heap->large_huge_span, span);
|
|
#endif
|
|
++heap->full_span_count;
|
|
|
|
return pointer_offset(span, SPAN_HEADER_SIZE);
|
|
}
|
|
|
|
//! Allocate a huge block by mapping memory pages directly
|
|
static void*
|
|
_rpmalloc_allocate_huge(heap_t* heap, size_t size) {
|
|
rpmalloc_assert(heap, "No thread heap");
|
|
_rpmalloc_heap_cache_adopt_deferred(heap, 0);
|
|
size += SPAN_HEADER_SIZE;
|
|
size_t num_pages = size >> _memory_page_size_shift;
|
|
if (size & (_memory_page_size - 1))
|
|
++num_pages;
|
|
size_t align_offset = 0;
|
|
span_t* span = (span_t*)_rpmalloc_mmap(num_pages * _memory_page_size, &align_offset);
|
|
if (!span)
|
|
return span;
|
|
|
|
//Store page count in span_count
|
|
span->size_class = SIZE_CLASS_HUGE;
|
|
span->span_count = (uint32_t)num_pages;
|
|
span->align_offset = (uint32_t)align_offset;
|
|
span->heap = heap;
|
|
_rpmalloc_stat_add_peak(&_huge_pages_current, num_pages, _huge_pages_peak);
|
|
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
_rpmalloc_span_double_link_list_add(&heap->large_huge_span, span);
|
|
#endif
|
|
++heap->full_span_count;
|
|
|
|
return pointer_offset(span, SPAN_HEADER_SIZE);
|
|
}
|
|
|
|
//! Allocate a block of the given size
|
|
static void*
|
|
_rpmalloc_allocate(heap_t* heap, size_t size) {
|
|
_rpmalloc_stat_add64(&_allocation_counter, 1);
|
|
if (EXPECTED(size <= SMALL_SIZE_LIMIT))
|
|
return _rpmalloc_allocate_small(heap, size);
|
|
else if (size <= _memory_medium_size_limit)
|
|
return _rpmalloc_allocate_medium(heap, size);
|
|
else if (size <= LARGE_SIZE_LIMIT)
|
|
return _rpmalloc_allocate_large(heap, size);
|
|
return _rpmalloc_allocate_huge(heap, size);
|
|
}
|
|
|
|
static void*
|
|
_rpmalloc_aligned_allocate(heap_t* heap, size_t alignment, size_t size) {
|
|
if (alignment <= SMALL_GRANULARITY)
|
|
return _rpmalloc_allocate(heap, size);
|
|
|
|
#if ENABLE_VALIDATE_ARGS
|
|
if ((size + alignment) < size) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
if (alignment & (alignment - 1)) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
if ((alignment <= SPAN_HEADER_SIZE) && (size < _memory_medium_size_limit)) {
|
|
// If alignment is less or equal to span header size (which is power of two),
|
|
// and size aligned to span header size multiples is less than size + alignment,
|
|
// then use natural alignment of blocks to provide alignment
|
|
size_t multiple_size = size ? (size + (SPAN_HEADER_SIZE - 1)) & ~(uintptr_t)(SPAN_HEADER_SIZE - 1) : SPAN_HEADER_SIZE;
|
|
rpmalloc_assert(!(multiple_size % SPAN_HEADER_SIZE), "Failed alignment calculation");
|
|
if (multiple_size <= (size + alignment))
|
|
return _rpmalloc_allocate(heap, multiple_size);
|
|
}
|
|
|
|
void* ptr = 0;
|
|
size_t align_mask = alignment - 1;
|
|
if (alignment <= _memory_page_size) {
|
|
ptr = _rpmalloc_allocate(heap, size + alignment);
|
|
if ((uintptr_t)ptr & align_mask) {
|
|
ptr = (void*)(((uintptr_t)ptr & ~(uintptr_t)align_mask) + alignment);
|
|
//Mark as having aligned blocks
|
|
span_t* span = (span_t*)((uintptr_t)ptr & _memory_span_mask);
|
|
span->flags |= SPAN_FLAG_ALIGNED_BLOCKS;
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
// Fallback to mapping new pages for this request. Since pointers passed
|
|
// to rpfree must be able to reach the start of the span by bitmasking of
|
|
// the address with the span size, the returned aligned pointer from this
|
|
// function must be with a span size of the start of the mapped area.
|
|
// In worst case this requires us to loop and map pages until we get a
|
|
// suitable memory address. It also means we can never align to span size
|
|
// or greater, since the span header will push alignment more than one
|
|
// span size away from span start (thus causing pointer mask to give us
|
|
// an invalid span start on free)
|
|
if (alignment & align_mask) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
if (alignment >= _memory_span_size) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
size_t extra_pages = alignment / _memory_page_size;
|
|
|
|
// Since each span has a header, we will at least need one extra memory page
|
|
size_t num_pages = 1 + (size / _memory_page_size);
|
|
if (size & (_memory_page_size - 1))
|
|
++num_pages;
|
|
|
|
if (extra_pages > num_pages)
|
|
num_pages = 1 + extra_pages;
|
|
|
|
size_t original_pages = num_pages;
|
|
size_t limit_pages = (_memory_span_size / _memory_page_size) * 2;
|
|
if (limit_pages < (original_pages * 2))
|
|
limit_pages = original_pages * 2;
|
|
|
|
size_t mapped_size, align_offset;
|
|
span_t* span;
|
|
|
|
retry:
|
|
align_offset = 0;
|
|
mapped_size = num_pages * _memory_page_size;
|
|
|
|
span = (span_t*)_rpmalloc_mmap(mapped_size, &align_offset);
|
|
if (!span) {
|
|
errno = ENOMEM;
|
|
return 0;
|
|
}
|
|
ptr = pointer_offset(span, SPAN_HEADER_SIZE);
|
|
|
|
if ((uintptr_t)ptr & align_mask)
|
|
ptr = (void*)(((uintptr_t)ptr & ~(uintptr_t)align_mask) + alignment);
|
|
|
|
if (((size_t)pointer_diff(ptr, span) >= _memory_span_size) ||
|
|
(pointer_offset(ptr, size) > pointer_offset(span, mapped_size)) ||
|
|
(((uintptr_t)ptr & _memory_span_mask) != (uintptr_t)span)) {
|
|
_rpmalloc_unmap(span, mapped_size, align_offset, mapped_size);
|
|
++num_pages;
|
|
if (num_pages > limit_pages) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
goto retry;
|
|
}
|
|
|
|
//Store page count in span_count
|
|
span->size_class = SIZE_CLASS_HUGE;
|
|
span->span_count = (uint32_t)num_pages;
|
|
span->align_offset = (uint32_t)align_offset;
|
|
span->heap = heap;
|
|
_rpmalloc_stat_add_peak(&_huge_pages_current, num_pages, _huge_pages_peak);
|
|
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
_rpmalloc_span_double_link_list_add(&heap->large_huge_span, span);
|
|
#endif
|
|
++heap->full_span_count;
|
|
|
|
_rpmalloc_stat_add64(&_allocation_counter, 1);
|
|
|
|
return ptr;
|
|
}
|
|
|
|
|
|
////////////
|
|
///
|
|
/// Deallocation entry points
|
|
///
|
|
//////
|
|
|
|
//! Deallocate the given small/medium memory block in the current thread local heap
|
|
static void
|
|
_rpmalloc_deallocate_direct_small_or_medium(span_t* span, void* block) {
|
|
heap_t* heap = span->heap;
|
|
rpmalloc_assert(heap->owner_thread == get_thread_id() || !heap->owner_thread || heap->finalize, "Internal failure");
|
|
//Add block to free list
|
|
if (UNEXPECTED(_rpmalloc_span_is_fully_utilized(span))) {
|
|
span->used_count = span->block_count;
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
_rpmalloc_span_double_link_list_remove(&heap->full_span[span->size_class], span);
|
|
#endif
|
|
_rpmalloc_span_double_link_list_add(&heap->size_class[span->size_class].partial_span, span);
|
|
--heap->full_span_count;
|
|
}
|
|
*((void**)block) = span->free_list;
|
|
--span->used_count;
|
|
span->free_list = block;
|
|
if (UNEXPECTED(span->used_count == span->list_size)) {
|
|
// If there are no used blocks it is guaranteed that no other external thread is accessing the span
|
|
if (span->used_count) {
|
|
// Make sure we have synchronized the deferred list and list size by using acquire semantics
|
|
// and guarantee that no external thread is accessing span concurrently
|
|
void* free_list;
|
|
do {
|
|
free_list = atomic_exchange_ptr_acquire(&span->free_list_deferred, INVALID_POINTER);
|
|
} while (free_list == INVALID_POINTER);
|
|
atomic_store_ptr_release(&span->free_list_deferred, free_list);
|
|
}
|
|
_rpmalloc_span_double_link_list_remove(&heap->size_class[span->size_class].partial_span, span);
|
|
_rpmalloc_span_release_to_cache(heap, span);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_deallocate_defer_free_span(heap_t* heap, span_t* span) {
|
|
if (span->size_class != SIZE_CLASS_HUGE)
|
|
_rpmalloc_stat_inc(&heap->span_use[span->span_count - 1].spans_deferred);
|
|
//This list does not need ABA protection, no mutable side state
|
|
do {
|
|
span->free_list = (void*)atomic_load_ptr(&heap->span_free_deferred);
|
|
} while (!atomic_cas_ptr(&heap->span_free_deferred, span, span->free_list));
|
|
}
|
|
|
|
//! Put the block in the deferred free list of the owning span
|
|
static void
|
|
_rpmalloc_deallocate_defer_small_or_medium(span_t* span, void* block) {
|
|
// The memory ordering here is a bit tricky, to avoid having to ABA protect
|
|
// the deferred free list to avoid desynchronization of list and list size
|
|
// we need to have acquire semantics on successful CAS of the pointer to
|
|
// guarantee the list_size variable validity + release semantics on pointer store
|
|
void* free_list;
|
|
do {
|
|
free_list = atomic_exchange_ptr_acquire(&span->free_list_deferred, INVALID_POINTER);
|
|
} while (free_list == INVALID_POINTER);
|
|
*((void**)block) = free_list;
|
|
uint32_t free_count = ++span->list_size;
|
|
int all_deferred_free = (free_count == span->block_count);
|
|
atomic_store_ptr_release(&span->free_list_deferred, block);
|
|
if (all_deferred_free) {
|
|
// Span was completely freed by this block. Due to the INVALID_POINTER spin lock
|
|
// no other thread can reach this state simultaneously on this span.
|
|
// Safe to move to owner heap deferred cache
|
|
_rpmalloc_deallocate_defer_free_span(span->heap, span);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_rpmalloc_deallocate_small_or_medium(span_t* span, void* p) {
|
|
_rpmalloc_stat_inc_free(span->heap, span->size_class);
|
|
if (span->flags & SPAN_FLAG_ALIGNED_BLOCKS) {
|
|
//Realign pointer to block start
|
|
void* blocks_start = pointer_offset(span, SPAN_HEADER_SIZE);
|
|
uint32_t block_offset = (uint32_t)pointer_diff(p, blocks_start);
|
|
p = pointer_offset(p, -(int32_t)(block_offset % span->block_size));
|
|
}
|
|
//Check if block belongs to this heap or if deallocation should be deferred
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
int defer = (span->heap->owner_thread && (span->heap->owner_thread != get_thread_id()) && !span->heap->finalize);
|
|
#else
|
|
int defer = ((span->heap->owner_thread != get_thread_id()) && !span->heap->finalize);
|
|
#endif
|
|
if (!defer)
|
|
_rpmalloc_deallocate_direct_small_or_medium(span, p);
|
|
else
|
|
_rpmalloc_deallocate_defer_small_or_medium(span, p);
|
|
}
|
|
|
|
//! Deallocate the given large memory block to the current heap
|
|
static void
|
|
_rpmalloc_deallocate_large(span_t* span) {
|
|
rpmalloc_assert(span->size_class == SIZE_CLASS_LARGE, "Bad span size class");
|
|
rpmalloc_assert(!(span->flags & SPAN_FLAG_MASTER) || !(span->flags & SPAN_FLAG_SUBSPAN), "Span flag corrupted");
|
|
rpmalloc_assert((span->flags & SPAN_FLAG_MASTER) || (span->flags & SPAN_FLAG_SUBSPAN), "Span flag corrupted");
|
|
//We must always defer (unless finalizing) if from another heap since we cannot touch the list or counters of another heap
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
int defer = (span->heap->owner_thread && (span->heap->owner_thread != get_thread_id()) && !span->heap->finalize);
|
|
#else
|
|
int defer = ((span->heap->owner_thread != get_thread_id()) && !span->heap->finalize);
|
|
#endif
|
|
if (defer) {
|
|
_rpmalloc_deallocate_defer_free_span(span->heap, span);
|
|
return;
|
|
}
|
|
rpmalloc_assert(span->heap->full_span_count, "Heap span counter corrupted");
|
|
--span->heap->full_span_count;
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
_rpmalloc_span_double_link_list_remove(&span->heap->large_huge_span, span);
|
|
#endif
|
|
#if ENABLE_ADAPTIVE_THREAD_CACHE || ENABLE_STATISTICS
|
|
//Decrease counter
|
|
size_t idx = span->span_count - 1;
|
|
atomic_decr32(&span->heap->span_use[idx].current);
|
|
#endif
|
|
heap_t* heap = span->heap;
|
|
rpmalloc_assert(heap, "No thread heap");
|
|
#if ENABLE_THREAD_CACHE
|
|
const int set_as_reserved = ((span->span_count > 1) && (heap->span_cache.count == 0) && !heap->finalize && !heap->spans_reserved);
|
|
#else
|
|
const int set_as_reserved = ((span->span_count > 1) && !heap->finalize && !heap->spans_reserved);
|
|
#endif
|
|
if (set_as_reserved) {
|
|
heap->span_reserve = span;
|
|
heap->spans_reserved = span->span_count;
|
|
if (span->flags & SPAN_FLAG_MASTER) {
|
|
heap->span_reserve_master = span;
|
|
} else { //SPAN_FLAG_SUBSPAN
|
|
span_t* master = (span_t*)pointer_offset(span, -(intptr_t)((size_t)span->offset_from_master * _memory_span_size));
|
|
heap->span_reserve_master = master;
|
|
rpmalloc_assert(master->flags & SPAN_FLAG_MASTER, "Span flag corrupted");
|
|
rpmalloc_assert(atomic_load32(&master->remaining_spans) >= (int32_t)span->span_count, "Master span count corrupted");
|
|
}
|
|
_rpmalloc_stat_inc(&heap->span_use[idx].spans_to_reserved);
|
|
} else {
|
|
//Insert into cache list
|
|
_rpmalloc_heap_cache_insert(heap, span);
|
|
}
|
|
}
|
|
|
|
//! Deallocate the given huge span
|
|
static void
|
|
_rpmalloc_deallocate_huge(span_t* span) {
|
|
rpmalloc_assert(span->heap, "No span heap");
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
int defer = (span->heap->owner_thread && (span->heap->owner_thread != get_thread_id()) && !span->heap->finalize);
|
|
#else
|
|
int defer = ((span->heap->owner_thread != get_thread_id()) && !span->heap->finalize);
|
|
#endif
|
|
if (defer) {
|
|
_rpmalloc_deallocate_defer_free_span(span->heap, span);
|
|
return;
|
|
}
|
|
rpmalloc_assert(span->heap->full_span_count, "Heap span counter corrupted");
|
|
--span->heap->full_span_count;
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
_rpmalloc_span_double_link_list_remove(&span->heap->large_huge_span, span);
|
|
#endif
|
|
|
|
//Oversized allocation, page count is stored in span_count
|
|
size_t num_pages = span->span_count;
|
|
_rpmalloc_unmap(span, num_pages * _memory_page_size, span->align_offset, num_pages * _memory_page_size);
|
|
_rpmalloc_stat_sub(&_huge_pages_current, num_pages);
|
|
}
|
|
|
|
//! Deallocate the given block
|
|
static void
|
|
_rpmalloc_deallocate(void* p) {
|
|
_rpmalloc_stat_add64(&_deallocation_counter, 1);
|
|
//Grab the span (always at start of span, using span alignment)
|
|
span_t* span = (span_t*)((uintptr_t)p & _memory_span_mask);
|
|
if (UNEXPECTED(!span))
|
|
return;
|
|
if (EXPECTED(span->size_class < SIZE_CLASS_COUNT))
|
|
_rpmalloc_deallocate_small_or_medium(span, p);
|
|
else if (span->size_class == SIZE_CLASS_LARGE)
|
|
_rpmalloc_deallocate_large(span);
|
|
else
|
|
_rpmalloc_deallocate_huge(span);
|
|
}
|
|
|
|
////////////
|
|
///
|
|
/// Reallocation entry points
|
|
///
|
|
//////
|
|
|
|
static size_t
|
|
_rpmalloc_usable_size(void* p);
|
|
|
|
//! Reallocate the given block to the given size
|
|
static void*
|
|
_rpmalloc_reallocate(heap_t* heap, void* p, size_t size, size_t oldsize, unsigned int flags) {
|
|
if (p) {
|
|
//Grab the span using guaranteed span alignment
|
|
span_t* span = (span_t*)((uintptr_t)p & _memory_span_mask);
|
|
if (EXPECTED(span->size_class < SIZE_CLASS_COUNT)) {
|
|
//Small/medium sized block
|
|
rpmalloc_assert(span->span_count == 1, "Span counter corrupted");
|
|
void* blocks_start = pointer_offset(span, SPAN_HEADER_SIZE);
|
|
uint32_t block_offset = (uint32_t)pointer_diff(p, blocks_start);
|
|
uint32_t block_idx = block_offset / span->block_size;
|
|
void* block = pointer_offset(blocks_start, (size_t)block_idx * span->block_size);
|
|
if (!oldsize)
|
|
oldsize = (size_t)((ptrdiff_t)span->block_size - pointer_diff(p, block));
|
|
if ((size_t)span->block_size >= size) {
|
|
//Still fits in block, never mind trying to save memory, but preserve data if alignment changed
|
|
if ((p != block) && !(flags & RPMALLOC_NO_PRESERVE))
|
|
memmove(block, p, oldsize);
|
|
return block;
|
|
}
|
|
} else if (span->size_class == SIZE_CLASS_LARGE) {
|
|
//Large block
|
|
size_t total_size = size + SPAN_HEADER_SIZE;
|
|
size_t num_spans = total_size >> _memory_span_size_shift;
|
|
if (total_size & (_memory_span_mask - 1))
|
|
++num_spans;
|
|
size_t current_spans = span->span_count;
|
|
void* block = pointer_offset(span, SPAN_HEADER_SIZE);
|
|
if (!oldsize)
|
|
oldsize = (current_spans * _memory_span_size) - (size_t)pointer_diff(p, block) - SPAN_HEADER_SIZE;
|
|
if ((current_spans >= num_spans) && (total_size >= (oldsize / 2))) {
|
|
//Still fits in block, never mind trying to save memory, but preserve data if alignment changed
|
|
if ((p != block) && !(flags & RPMALLOC_NO_PRESERVE))
|
|
memmove(block, p, oldsize);
|
|
return block;
|
|
}
|
|
} else {
|
|
//Oversized block
|
|
size_t total_size = size + SPAN_HEADER_SIZE;
|
|
size_t num_pages = total_size >> _memory_page_size_shift;
|
|
if (total_size & (_memory_page_size - 1))
|
|
++num_pages;
|
|
//Page count is stored in span_count
|
|
size_t current_pages = span->span_count;
|
|
void* block = pointer_offset(span, SPAN_HEADER_SIZE);
|
|
if (!oldsize)
|
|
oldsize = (current_pages * _memory_page_size) - (size_t)pointer_diff(p, block) - SPAN_HEADER_SIZE;
|
|
if ((current_pages >= num_pages) && (num_pages >= (current_pages / 2))) {
|
|
//Still fits in block, never mind trying to save memory, but preserve data if alignment changed
|
|
if ((p != block) && !(flags & RPMALLOC_NO_PRESERVE))
|
|
memmove(block, p, oldsize);
|
|
return block;
|
|
}
|
|
}
|
|
} else {
|
|
oldsize = 0;
|
|
}
|
|
|
|
if (!!(flags & RPMALLOC_GROW_OR_FAIL))
|
|
return 0;
|
|
|
|
//Size is greater than block size, need to allocate a new block and deallocate the old
|
|
//Avoid hysteresis by overallocating if increase is small (below 37%)
|
|
size_t lower_bound = oldsize + (oldsize >> 2) + (oldsize >> 3);
|
|
size_t new_size = (size > lower_bound) ? size : ((size > oldsize) ? lower_bound : size);
|
|
void* block = _rpmalloc_allocate(heap, new_size);
|
|
if (p && block) {
|
|
if (!(flags & RPMALLOC_NO_PRESERVE))
|
|
memcpy(block, p, oldsize < new_size ? oldsize : new_size);
|
|
_rpmalloc_deallocate(p);
|
|
}
|
|
|
|
return block;
|
|
}
|
|
|
|
static void*
|
|
_rpmalloc_aligned_reallocate(heap_t* heap, void* ptr, size_t alignment, size_t size, size_t oldsize,
|
|
unsigned int flags) {
|
|
if (alignment <= SMALL_GRANULARITY)
|
|
return _rpmalloc_reallocate(heap, ptr, size, oldsize, flags);
|
|
|
|
int no_alloc = !!(flags & RPMALLOC_GROW_OR_FAIL);
|
|
size_t usablesize = (ptr ? _rpmalloc_usable_size(ptr) : 0);
|
|
if ((usablesize >= size) && !((uintptr_t)ptr & (alignment - 1))) {
|
|
if (no_alloc || (size >= (usablesize / 2)))
|
|
return ptr;
|
|
}
|
|
// Aligned alloc marks span as having aligned blocks
|
|
void* block = (!no_alloc ? _rpmalloc_aligned_allocate(heap, alignment, size) : 0);
|
|
if (EXPECTED(block != 0)) {
|
|
if (!(flags & RPMALLOC_NO_PRESERVE) && ptr) {
|
|
if (!oldsize)
|
|
oldsize = usablesize;
|
|
memcpy(block, ptr, oldsize < size ? oldsize : size);
|
|
}
|
|
_rpmalloc_deallocate(ptr);
|
|
}
|
|
return block;
|
|
}
|
|
|
|
|
|
////////////
|
|
///
|
|
/// Initialization, finalization and utility
|
|
///
|
|
//////
|
|
|
|
//! Get the usable size of the given block
|
|
static size_t
|
|
_rpmalloc_usable_size(void* p) {
|
|
//Grab the span using guaranteed span alignment
|
|
span_t* span = (span_t*)((uintptr_t)p & _memory_span_mask);
|
|
if (span->size_class < SIZE_CLASS_COUNT) {
|
|
//Small/medium block
|
|
void* blocks_start = pointer_offset(span, SPAN_HEADER_SIZE);
|
|
return span->block_size - ((size_t)pointer_diff(p, blocks_start) % span->block_size);
|
|
}
|
|
if (span->size_class == SIZE_CLASS_LARGE) {
|
|
//Large block
|
|
size_t current_spans = span->span_count;
|
|
return (current_spans * _memory_span_size) - (size_t)pointer_diff(p, span);
|
|
}
|
|
//Oversized block, page count is stored in span_count
|
|
size_t current_pages = span->span_count;
|
|
return (current_pages * _memory_page_size) - (size_t)pointer_diff(p, span);
|
|
}
|
|
|
|
//! Adjust and optimize the size class properties for the given class
|
|
static void
|
|
_rpmalloc_adjust_size_class(size_t iclass) {
|
|
size_t block_size = _memory_size_class[iclass].block_size;
|
|
size_t block_count = (_memory_span_size - SPAN_HEADER_SIZE) / block_size;
|
|
|
|
_memory_size_class[iclass].block_count = (uint16_t)block_count;
|
|
_memory_size_class[iclass].class_idx = (uint16_t)iclass;
|
|
|
|
//Check if previous size classes can be merged
|
|
if (iclass >= SMALL_CLASS_COUNT) {
|
|
size_t prevclass = iclass;
|
|
while (prevclass > 0) {
|
|
--prevclass;
|
|
//A class can be merged if number of pages and number of blocks are equal
|
|
if (_memory_size_class[prevclass].block_count == _memory_size_class[iclass].block_count)
|
|
memcpy(_memory_size_class + prevclass, _memory_size_class + iclass, sizeof(_memory_size_class[iclass]));
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
//! Initialize the allocator and setup global data
|
|
TRACY_API int
|
|
rpmalloc_initialize(void) {
|
|
if (_rpmalloc_initialized) {
|
|
rpmalloc_thread_initialize();
|
|
return 0;
|
|
}
|
|
return rpmalloc_initialize_config(0);
|
|
}
|
|
|
|
int
|
|
rpmalloc_initialize_config(const rpmalloc_config_t* config) {
|
|
if (_rpmalloc_initialized) {
|
|
rpmalloc_thread_initialize();
|
|
return 0;
|
|
}
|
|
_rpmalloc_initialized = 1;
|
|
|
|
if (config)
|
|
memcpy(&_memory_config, config, sizeof(rpmalloc_config_t));
|
|
else
|
|
memset(&_memory_config, 0, sizeof(rpmalloc_config_t));
|
|
|
|
if (!_memory_config.memory_map || !_memory_config.memory_unmap) {
|
|
_memory_config.memory_map = _rpmalloc_mmap_os;
|
|
_memory_config.memory_unmap = _rpmalloc_unmap_os;
|
|
}
|
|
|
|
#if PLATFORM_WINDOWS
|
|
SYSTEM_INFO system_info;
|
|
memset(&system_info, 0, sizeof(system_info));
|
|
GetSystemInfo(&system_info);
|
|
_memory_map_granularity = system_info.dwAllocationGranularity;
|
|
#else
|
|
_memory_map_granularity = (size_t)sysconf(_SC_PAGESIZE);
|
|
#endif
|
|
|
|
#if RPMALLOC_CONFIGURABLE
|
|
_memory_page_size = _memory_config.page_size;
|
|
#else
|
|
_memory_page_size = 0;
|
|
#endif
|
|
_memory_huge_pages = 0;
|
|
if (!_memory_page_size) {
|
|
#if PLATFORM_WINDOWS
|
|
_memory_page_size = system_info.dwPageSize;
|
|
#else
|
|
_memory_page_size = _memory_map_granularity;
|
|
if (_memory_config.enable_huge_pages) {
|
|
#if defined(__linux__)
|
|
size_t huge_page_size = 0;
|
|
FILE* meminfo = fopen("/proc/meminfo", "r");
|
|
if (meminfo) {
|
|
char line[128];
|
|
while (!huge_page_size && fgets(line, sizeof(line) - 1, meminfo)) {
|
|
line[sizeof(line) - 1] = 0;
|
|
if (strstr(line, "Hugepagesize:"))
|
|
huge_page_size = (size_t)strtol(line + 13, 0, 10) * 1024;
|
|
}
|
|
fclose(meminfo);
|
|
}
|
|
if (huge_page_size) {
|
|
_memory_huge_pages = 1;
|
|
_memory_page_size = huge_page_size;
|
|
_memory_map_granularity = huge_page_size;
|
|
}
|
|
#elif defined(__FreeBSD__)
|
|
int rc;
|
|
size_t sz = sizeof(rc);
|
|
|
|
if (sysctlbyname("vm.pmap.pg_ps_enabled", &rc, &sz, NULL, 0) == 0 && rc == 1) {
|
|
_memory_huge_pages = 1;
|
|
_memory_page_size = 2 * 1024 * 1024;
|
|
_memory_map_granularity = _memory_page_size;
|
|
}
|
|
#elif defined(__APPLE__) || defined(__NetBSD__)
|
|
_memory_huge_pages = 1;
|
|
_memory_page_size = 2 * 1024 * 1024;
|
|
_memory_map_granularity = _memory_page_size;
|
|
#endif
|
|
}
|
|
#endif
|
|
} else {
|
|
if (_memory_config.enable_huge_pages)
|
|
_memory_huge_pages = 1;
|
|
}
|
|
|
|
#if PLATFORM_WINDOWS
|
|
if (_memory_config.enable_huge_pages) {
|
|
HANDLE token = 0;
|
|
size_t large_page_minimum = GetLargePageMinimum();
|
|
if (large_page_minimum)
|
|
OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &token);
|
|
if (token) {
|
|
LUID luid;
|
|
if (LookupPrivilegeValue(0, SE_LOCK_MEMORY_NAME, &luid)) {
|
|
TOKEN_PRIVILEGES token_privileges;
|
|
memset(&token_privileges, 0, sizeof(token_privileges));
|
|
token_privileges.PrivilegeCount = 1;
|
|
token_privileges.Privileges[0].Luid = luid;
|
|
token_privileges.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
|
|
if (AdjustTokenPrivileges(token, FALSE, &token_privileges, 0, 0, 0)) {
|
|
if (GetLastError() == ERROR_SUCCESS)
|
|
_memory_huge_pages = 1;
|
|
}
|
|
}
|
|
CloseHandle(token);
|
|
}
|
|
if (_memory_huge_pages) {
|
|
if (large_page_minimum > _memory_page_size)
|
|
_memory_page_size = large_page_minimum;
|
|
if (large_page_minimum > _memory_map_granularity)
|
|
_memory_map_granularity = large_page_minimum;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
size_t min_span_size = 256;
|
|
size_t max_page_size;
|
|
#if UINTPTR_MAX > 0xFFFFFFFF
|
|
max_page_size = 4096ULL * 1024ULL * 1024ULL;
|
|
#else
|
|
max_page_size = 4 * 1024 * 1024;
|
|
#endif
|
|
if (_memory_page_size < min_span_size)
|
|
_memory_page_size = min_span_size;
|
|
if (_memory_page_size > max_page_size)
|
|
_memory_page_size = max_page_size;
|
|
_memory_page_size_shift = 0;
|
|
size_t page_size_bit = _memory_page_size;
|
|
while (page_size_bit != 1) {
|
|
++_memory_page_size_shift;
|
|
page_size_bit >>= 1;
|
|
}
|
|
_memory_page_size = ((size_t)1 << _memory_page_size_shift);
|
|
|
|
#if RPMALLOC_CONFIGURABLE
|
|
if (!_memory_config.span_size) {
|
|
_memory_span_size = _memory_default_span_size;
|
|
_memory_span_size_shift = _memory_default_span_size_shift;
|
|
_memory_span_mask = _memory_default_span_mask;
|
|
} else {
|
|
size_t span_size = _memory_config.span_size;
|
|
if (span_size > (256 * 1024))
|
|
span_size = (256 * 1024);
|
|
_memory_span_size = 4096;
|
|
_memory_span_size_shift = 12;
|
|
while (_memory_span_size < span_size) {
|
|
_memory_span_size <<= 1;
|
|
++_memory_span_size_shift;
|
|
}
|
|
_memory_span_mask = ~(uintptr_t)(_memory_span_size - 1);
|
|
}
|
|
#endif
|
|
|
|
_memory_span_map_count = ( _memory_config.span_map_count ? _memory_config.span_map_count : DEFAULT_SPAN_MAP_COUNT);
|
|
if ((_memory_span_size * _memory_span_map_count) < _memory_page_size)
|
|
_memory_span_map_count = (_memory_page_size / _memory_span_size);
|
|
if ((_memory_page_size >= _memory_span_size) && ((_memory_span_map_count * _memory_span_size) % _memory_page_size))
|
|
_memory_span_map_count = (_memory_page_size / _memory_span_size);
|
|
_memory_heap_reserve_count = (_memory_span_map_count > DEFAULT_SPAN_MAP_COUNT) ? DEFAULT_SPAN_MAP_COUNT : _memory_span_map_count;
|
|
|
|
_memory_config.page_size = _memory_page_size;
|
|
_memory_config.span_size = _memory_span_size;
|
|
_memory_config.span_map_count = _memory_span_map_count;
|
|
_memory_config.enable_huge_pages = _memory_huge_pages;
|
|
|
|
#if ((defined(__APPLE__) || defined(__HAIKU__)) && ENABLE_PRELOAD) || defined(__TINYC__)
|
|
if (pthread_key_create(&_memory_thread_heap, _rpmalloc_heap_release_raw_fc))
|
|
return -1;
|
|
#endif
|
|
#if defined(_WIN32) && (!defined(BUILD_DYNAMIC_LINK) || !BUILD_DYNAMIC_LINK)
|
|
fls_key = FlsAlloc(&_rpmalloc_thread_destructor);
|
|
#endif
|
|
|
|
//Setup all small and medium size classes
|
|
size_t iclass = 0;
|
|
_memory_size_class[iclass].block_size = SMALL_GRANULARITY;
|
|
_rpmalloc_adjust_size_class(iclass);
|
|
for (iclass = 1; iclass < SMALL_CLASS_COUNT; ++iclass) {
|
|
size_t size = iclass * SMALL_GRANULARITY;
|
|
_memory_size_class[iclass].block_size = (uint32_t)size;
|
|
_rpmalloc_adjust_size_class(iclass);
|
|
}
|
|
//At least two blocks per span, then fall back to large allocations
|
|
_memory_medium_size_limit = (_memory_span_size - SPAN_HEADER_SIZE) >> 1;
|
|
if (_memory_medium_size_limit > MEDIUM_SIZE_LIMIT)
|
|
_memory_medium_size_limit = MEDIUM_SIZE_LIMIT;
|
|
for (iclass = 0; iclass < MEDIUM_CLASS_COUNT; ++iclass) {
|
|
size_t size = SMALL_SIZE_LIMIT + ((iclass + 1) * MEDIUM_GRANULARITY);
|
|
if (size > _memory_medium_size_limit)
|
|
break;
|
|
_memory_size_class[SMALL_CLASS_COUNT + iclass].block_size = (uint32_t)size;
|
|
_rpmalloc_adjust_size_class(SMALL_CLASS_COUNT + iclass);
|
|
}
|
|
|
|
_memory_orphan_heaps = 0;
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
_memory_first_class_orphan_heaps = 0;
|
|
#endif
|
|
#if ENABLE_STATISTICS
|
|
atomic_store32(&_memory_active_heaps, 0);
|
|
atomic_store32(&_mapped_pages, 0);
|
|
_mapped_pages_peak = 0;
|
|
atomic_store32(&_master_spans, 0);
|
|
atomic_store32(&_mapped_total, 0);
|
|
atomic_store32(&_unmapped_total, 0);
|
|
atomic_store32(&_mapped_pages_os, 0);
|
|
atomic_store32(&_huge_pages_current, 0);
|
|
_huge_pages_peak = 0;
|
|
#endif
|
|
memset(_memory_heaps, 0, sizeof(_memory_heaps));
|
|
atomic_store32_release(&_memory_global_lock, 0);
|
|
|
|
//Initialize this thread
|
|
rpmalloc_thread_initialize();
|
|
return 0;
|
|
}
|
|
|
|
//! Finalize the allocator
|
|
TRACY_API void
|
|
rpmalloc_finalize(void) {
|
|
rpmalloc_thread_finalize(1);
|
|
//rpmalloc_dump_statistics(stdout);
|
|
|
|
if (_memory_global_reserve) {
|
|
atomic_add32(&_memory_global_reserve_master->remaining_spans, -(int32_t)_memory_global_reserve_count);
|
|
_memory_global_reserve_master = 0;
|
|
_memory_global_reserve_count = 0;
|
|
_memory_global_reserve = 0;
|
|
}
|
|
atomic_store32_release(&_memory_global_lock, 0);
|
|
|
|
//Free all thread caches and fully free spans
|
|
for (size_t list_idx = 0; list_idx < HEAP_ARRAY_SIZE; ++list_idx) {
|
|
heap_t* heap = _memory_heaps[list_idx];
|
|
while (heap) {
|
|
heap_t* next_heap = heap->next_heap;
|
|
heap->finalize = 1;
|
|
_rpmalloc_heap_global_finalize(heap);
|
|
heap = next_heap;
|
|
}
|
|
}
|
|
|
|
#if ENABLE_GLOBAL_CACHE
|
|
//Free global caches
|
|
for (size_t iclass = 0; iclass < LARGE_CLASS_COUNT; ++iclass)
|
|
_rpmalloc_global_cache_finalize(&_memory_span_cache[iclass]);
|
|
#endif
|
|
|
|
#if (defined(__APPLE__) || defined(__HAIKU__)) && ENABLE_PRELOAD
|
|
pthread_key_delete(_memory_thread_heap);
|
|
#endif
|
|
#if defined(_WIN32) && (!defined(BUILD_DYNAMIC_LINK) || !BUILD_DYNAMIC_LINK)
|
|
FlsFree(fls_key);
|
|
fls_key = 0;
|
|
#endif
|
|
#if ENABLE_STATISTICS
|
|
//If you hit these asserts you probably have memory leaks (perhaps global scope data doing dynamic allocations) or double frees in your code
|
|
rpmalloc_assert(atomic_load32(&_mapped_pages) == 0, "Memory leak detected");
|
|
rpmalloc_assert(atomic_load32(&_mapped_pages_os) == 0, "Memory leak detected");
|
|
#endif
|
|
|
|
_rpmalloc_initialized = 0;
|
|
}
|
|
|
|
//! Initialize thread, assign heap
|
|
TRACY_API void
|
|
rpmalloc_thread_initialize(void) {
|
|
if (!get_thread_heap_raw()) {
|
|
heap_t* heap = _rpmalloc_heap_allocate(0);
|
|
if (heap) {
|
|
_rpmalloc_stat_inc(&_memory_active_heaps);
|
|
set_thread_heap(heap);
|
|
#if defined(_WIN32) && (!defined(BUILD_DYNAMIC_LINK) || !BUILD_DYNAMIC_LINK)
|
|
FlsSetValue(fls_key, heap);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
//! Finalize thread, orphan heap
|
|
TRACY_API void
|
|
rpmalloc_thread_finalize(int release_caches) {
|
|
heap_t* heap = get_thread_heap_raw();
|
|
if (heap)
|
|
_rpmalloc_heap_release_raw(heap, release_caches);
|
|
set_thread_heap(0);
|
|
#if defined(_WIN32) && (!defined(BUILD_DYNAMIC_LINK) || !BUILD_DYNAMIC_LINK)
|
|
FlsSetValue(fls_key, 0);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
rpmalloc_is_thread_initialized(void) {
|
|
return (get_thread_heap_raw() != 0) ? 1 : 0;
|
|
}
|
|
|
|
const rpmalloc_config_t*
|
|
rpmalloc_config(void) {
|
|
return &_memory_config;
|
|
}
|
|
|
|
// Extern interface
|
|
|
|
TRACY_API RPMALLOC_ALLOCATOR void*
|
|
rpmalloc(size_t size) {
|
|
#if ENABLE_VALIDATE_ARGS
|
|
if (size >= MAX_ALLOC_SIZE) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#endif
|
|
heap_t* heap = get_thread_heap();
|
|
return _rpmalloc_allocate(heap, size);
|
|
}
|
|
|
|
TRACY_API void
|
|
rpfree(void* ptr) {
|
|
_rpmalloc_deallocate(ptr);
|
|
}
|
|
|
|
extern inline RPMALLOC_ALLOCATOR void*
|
|
rpcalloc(size_t num, size_t size) {
|
|
size_t total;
|
|
#if ENABLE_VALIDATE_ARGS
|
|
#if PLATFORM_WINDOWS
|
|
int err = SizeTMult(num, size, &total);
|
|
if ((err != S_OK) || (total >= MAX_ALLOC_SIZE)) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#else
|
|
int err = __builtin_umull_overflow(num, size, &total);
|
|
if (err || (total >= MAX_ALLOC_SIZE)) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#endif
|
|
#else
|
|
total = num * size;
|
|
#endif
|
|
heap_t* heap = get_thread_heap();
|
|
void* block = _rpmalloc_allocate(heap, total);
|
|
if (block)
|
|
memset(block, 0, total);
|
|
return block;
|
|
}
|
|
|
|
TRACY_API RPMALLOC_ALLOCATOR void*
|
|
rprealloc(void* ptr, size_t size) {
|
|
#if ENABLE_VALIDATE_ARGS
|
|
if (size >= MAX_ALLOC_SIZE) {
|
|
errno = EINVAL;
|
|
return ptr;
|
|
}
|
|
#endif
|
|
heap_t* heap = get_thread_heap();
|
|
return _rpmalloc_reallocate(heap, ptr, size, 0, 0);
|
|
}
|
|
|
|
extern RPMALLOC_ALLOCATOR void*
|
|
rpaligned_realloc(void* ptr, size_t alignment, size_t size, size_t oldsize,
|
|
unsigned int flags) {
|
|
#if ENABLE_VALIDATE_ARGS
|
|
if ((size + alignment < size) || (alignment > _memory_page_size)) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#endif
|
|
heap_t* heap = get_thread_heap();
|
|
return _rpmalloc_aligned_reallocate(heap, ptr, alignment, size, oldsize, flags);
|
|
}
|
|
|
|
extern RPMALLOC_ALLOCATOR void*
|
|
rpaligned_alloc(size_t alignment, size_t size) {
|
|
heap_t* heap = get_thread_heap();
|
|
return _rpmalloc_aligned_allocate(heap, alignment, size);
|
|
}
|
|
|
|
extern inline RPMALLOC_ALLOCATOR void*
|
|
rpaligned_calloc(size_t alignment, size_t num, size_t size) {
|
|
size_t total;
|
|
#if ENABLE_VALIDATE_ARGS
|
|
#if PLATFORM_WINDOWS
|
|
int err = SizeTMult(num, size, &total);
|
|
if ((err != S_OK) || (total >= MAX_ALLOC_SIZE)) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#else
|
|
int err = __builtin_umull_overflow(num, size, &total);
|
|
if (err || (total >= MAX_ALLOC_SIZE)) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#endif
|
|
#else
|
|
total = num * size;
|
|
#endif
|
|
void* block = rpaligned_alloc(alignment, total);
|
|
if (block)
|
|
memset(block, 0, total);
|
|
return block;
|
|
}
|
|
|
|
extern inline RPMALLOC_ALLOCATOR void*
|
|
rpmemalign(size_t alignment, size_t size) {
|
|
return rpaligned_alloc(alignment, size);
|
|
}
|
|
|
|
extern inline int
|
|
rpposix_memalign(void **memptr, size_t alignment, size_t size) {
|
|
if (memptr)
|
|
*memptr = rpaligned_alloc(alignment, size);
|
|
else
|
|
return EINVAL;
|
|
return *memptr ? 0 : ENOMEM;
|
|
}
|
|
|
|
extern inline size_t
|
|
rpmalloc_usable_size(void* ptr) {
|
|
return (ptr ? _rpmalloc_usable_size(ptr) : 0);
|
|
}
|
|
|
|
extern inline void
|
|
rpmalloc_thread_collect(void) {
|
|
}
|
|
|
|
void
|
|
rpmalloc_thread_statistics(rpmalloc_thread_statistics_t* stats) {
|
|
memset(stats, 0, sizeof(rpmalloc_thread_statistics_t));
|
|
heap_t* heap = get_thread_heap_raw();
|
|
if (!heap)
|
|
return;
|
|
|
|
for (size_t iclass = 0; iclass < SIZE_CLASS_COUNT; ++iclass) {
|
|
size_class_t* size_class = _memory_size_class + iclass;
|
|
span_t* span = heap->size_class[iclass].partial_span;
|
|
while (span) {
|
|
size_t free_count = span->list_size;
|
|
size_t block_count = size_class->block_count;
|
|
if (span->free_list_limit < block_count)
|
|
block_count = span->free_list_limit;
|
|
free_count += (block_count - span->used_count);
|
|
stats->sizecache = free_count * size_class->block_size;
|
|
span = span->next;
|
|
}
|
|
}
|
|
|
|
#if ENABLE_THREAD_CACHE
|
|
for (size_t iclass = 0; iclass < LARGE_CLASS_COUNT; ++iclass) {
|
|
span_cache_t* span_cache;
|
|
if (!iclass)
|
|
span_cache = &heap->span_cache;
|
|
else
|
|
span_cache = (span_cache_t*)(heap->span_large_cache + (iclass - 1));
|
|
stats->spancache = span_cache->count * (iclass + 1) * _memory_span_size;
|
|
}
|
|
#endif
|
|
|
|
span_t* deferred = (span_t*)atomic_load_ptr(&heap->span_free_deferred);
|
|
while (deferred) {
|
|
if (deferred->size_class != SIZE_CLASS_HUGE)
|
|
stats->spancache = (size_t)deferred->span_count * _memory_span_size;
|
|
deferred = (span_t*)deferred->free_list;
|
|
}
|
|
|
|
#if ENABLE_STATISTICS
|
|
stats->thread_to_global = (size_t)atomic_load64(&heap->thread_to_global);
|
|
stats->global_to_thread = (size_t)atomic_load64(&heap->global_to_thread);
|
|
|
|
for (size_t iclass = 0; iclass < LARGE_CLASS_COUNT; ++iclass) {
|
|
stats->span_use[iclass].current = (size_t)atomic_load32(&heap->span_use[iclass].current);
|
|
stats->span_use[iclass].peak = (size_t)atomic_load32(&heap->span_use[iclass].high);
|
|
stats->span_use[iclass].to_global = (size_t)atomic_load32(&heap->span_use[iclass].spans_to_global);
|
|
stats->span_use[iclass].from_global = (size_t)atomic_load32(&heap->span_use[iclass].spans_from_global);
|
|
stats->span_use[iclass].to_cache = (size_t)atomic_load32(&heap->span_use[iclass].spans_to_cache);
|
|
stats->span_use[iclass].from_cache = (size_t)atomic_load32(&heap->span_use[iclass].spans_from_cache);
|
|
stats->span_use[iclass].to_reserved = (size_t)atomic_load32(&heap->span_use[iclass].spans_to_reserved);
|
|
stats->span_use[iclass].from_reserved = (size_t)atomic_load32(&heap->span_use[iclass].spans_from_reserved);
|
|
stats->span_use[iclass].map_calls = (size_t)atomic_load32(&heap->span_use[iclass].spans_map_calls);
|
|
}
|
|
for (size_t iclass = 0; iclass < SIZE_CLASS_COUNT; ++iclass) {
|
|
stats->size_use[iclass].alloc_current = (size_t)atomic_load32(&heap->size_class_use[iclass].alloc_current);
|
|
stats->size_use[iclass].alloc_peak = (size_t)heap->size_class_use[iclass].alloc_peak;
|
|
stats->size_use[iclass].alloc_total = (size_t)atomic_load32(&heap->size_class_use[iclass].alloc_total);
|
|
stats->size_use[iclass].free_total = (size_t)atomic_load32(&heap->size_class_use[iclass].free_total);
|
|
stats->size_use[iclass].spans_to_cache = (size_t)atomic_load32(&heap->size_class_use[iclass].spans_to_cache);
|
|
stats->size_use[iclass].spans_from_cache = (size_t)atomic_load32(&heap->size_class_use[iclass].spans_from_cache);
|
|
stats->size_use[iclass].spans_from_reserved = (size_t)atomic_load32(&heap->size_class_use[iclass].spans_from_reserved);
|
|
stats->size_use[iclass].map_calls = (size_t)atomic_load32(&heap->size_class_use[iclass].spans_map_calls);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
rpmalloc_global_statistics(rpmalloc_global_statistics_t* stats) {
|
|
memset(stats, 0, sizeof(rpmalloc_global_statistics_t));
|
|
#if ENABLE_STATISTICS
|
|
stats->mapped = (size_t)atomic_load32(&_mapped_pages) * _memory_page_size;
|
|
stats->mapped_peak = (size_t)_mapped_pages_peak * _memory_page_size;
|
|
stats->mapped_total = (size_t)atomic_load32(&_mapped_total) * _memory_page_size;
|
|
stats->unmapped_total = (size_t)atomic_load32(&_unmapped_total) * _memory_page_size;
|
|
stats->huge_alloc = (size_t)atomic_load32(&_huge_pages_current) * _memory_page_size;
|
|
stats->huge_alloc_peak = (size_t)_huge_pages_peak * _memory_page_size;
|
|
#endif
|
|
#if ENABLE_GLOBAL_CACHE
|
|
for (size_t iclass = 0; iclass < LARGE_CLASS_COUNT; ++iclass)
|
|
stats->cached += _memory_span_cache[iclass].count * (iclass + 1) * _memory_span_size;
|
|
#endif
|
|
}
|
|
|
|
#if ENABLE_STATISTICS
|
|
|
|
static void
|
|
_memory_heap_dump_statistics(heap_t* heap, void* file) {
|
|
fprintf(file, "Heap %d stats:\n", heap->id);
|
|
fprintf(file, "Class CurAlloc PeakAlloc TotAlloc TotFree BlkSize BlkCount SpansCur SpansPeak PeakAllocMiB ToCacheMiB FromCacheMiB FromReserveMiB MmapCalls\n");
|
|
for (size_t iclass = 0; iclass < SIZE_CLASS_COUNT; ++iclass) {
|
|
if (!atomic_load32(&heap->size_class_use[iclass].alloc_total))
|
|
continue;
|
|
fprintf(file, "%3u: %10u %10u %10u %10u %8u %8u %8d %9d %13zu %11zu %12zu %14zu %9u\n", (uint32_t)iclass,
|
|
atomic_load32(&heap->size_class_use[iclass].alloc_current),
|
|
heap->size_class_use[iclass].alloc_peak,
|
|
atomic_load32(&heap->size_class_use[iclass].alloc_total),
|
|
atomic_load32(&heap->size_class_use[iclass].free_total),
|
|
_memory_size_class[iclass].block_size,
|
|
_memory_size_class[iclass].block_count,
|
|
atomic_load32(&heap->size_class_use[iclass].spans_current),
|
|
heap->size_class_use[iclass].spans_peak,
|
|
((size_t)heap->size_class_use[iclass].alloc_peak * (size_t)_memory_size_class[iclass].block_size) / (size_t)(1024 * 1024),
|
|
((size_t)atomic_load32(&heap->size_class_use[iclass].spans_to_cache) * _memory_span_size) / (size_t)(1024 * 1024),
|
|
((size_t)atomic_load32(&heap->size_class_use[iclass].spans_from_cache) * _memory_span_size) / (size_t)(1024 * 1024),
|
|
((size_t)atomic_load32(&heap->size_class_use[iclass].spans_from_reserved) * _memory_span_size) / (size_t)(1024 * 1024),
|
|
atomic_load32(&heap->size_class_use[iclass].spans_map_calls));
|
|
}
|
|
fprintf(file, "Spans Current Peak Deferred PeakMiB Cached ToCacheMiB FromCacheMiB ToReserveMiB FromReserveMiB ToGlobalMiB FromGlobalMiB MmapCalls\n");
|
|
for (size_t iclass = 0; iclass < LARGE_CLASS_COUNT; ++iclass) {
|
|
if (!atomic_load32(&heap->span_use[iclass].high) && !atomic_load32(&heap->span_use[iclass].spans_map_calls))
|
|
continue;
|
|
fprintf(file, "%4u: %8d %8u %8u %8zu %7u %11zu %12zu %12zu %14zu %11zu %13zu %10u\n", (uint32_t)(iclass + 1),
|
|
atomic_load32(&heap->span_use[iclass].current),
|
|
atomic_load32(&heap->span_use[iclass].high),
|
|
atomic_load32(&heap->span_use[iclass].spans_deferred),
|
|
((size_t)atomic_load32(&heap->span_use[iclass].high) * (size_t)_memory_span_size * (iclass + 1)) / (size_t)(1024 * 1024),
|
|
#if ENABLE_THREAD_CACHE
|
|
(unsigned int)(!iclass ? heap->span_cache.count : heap->span_large_cache[iclass - 1].count),
|
|
((size_t)atomic_load32(&heap->span_use[iclass].spans_to_cache) * (iclass + 1) * _memory_span_size) / (size_t)(1024 * 1024),
|
|
((size_t)atomic_load32(&heap->span_use[iclass].spans_from_cache) * (iclass + 1) * _memory_span_size) / (size_t)(1024 * 1024),
|
|
#else
|
|
0, (size_t)0, (size_t)0,
|
|
#endif
|
|
((size_t)atomic_load32(&heap->span_use[iclass].spans_to_reserved) * (iclass + 1) * _memory_span_size) / (size_t)(1024 * 1024),
|
|
((size_t)atomic_load32(&heap->span_use[iclass].spans_from_reserved) * (iclass + 1) * _memory_span_size) / (size_t)(1024 * 1024),
|
|
((size_t)atomic_load32(&heap->span_use[iclass].spans_to_global) * (size_t)_memory_span_size * (iclass + 1)) / (size_t)(1024 * 1024),
|
|
((size_t)atomic_load32(&heap->span_use[iclass].spans_from_global) * (size_t)_memory_span_size * (iclass + 1)) / (size_t)(1024 * 1024),
|
|
atomic_load32(&heap->span_use[iclass].spans_map_calls));
|
|
}
|
|
fprintf(file, "Full spans: %zu\n", heap->full_span_count);
|
|
fprintf(file, "ThreadToGlobalMiB GlobalToThreadMiB\n");
|
|
fprintf(file, "%17zu %17zu\n", (size_t)atomic_load64(&heap->thread_to_global) / (size_t)(1024 * 1024), (size_t)atomic_load64(&heap->global_to_thread) / (size_t)(1024 * 1024));
|
|
}
|
|
|
|
#endif
|
|
|
|
void
|
|
rpmalloc_dump_statistics(void* file) {
|
|
#if ENABLE_STATISTICS
|
|
for (size_t list_idx = 0; list_idx < HEAP_ARRAY_SIZE; ++list_idx) {
|
|
heap_t* heap = _memory_heaps[list_idx];
|
|
while (heap) {
|
|
int need_dump = 0;
|
|
for (size_t iclass = 0; !need_dump && (iclass < SIZE_CLASS_COUNT); ++iclass) {
|
|
if (!atomic_load32(&heap->size_class_use[iclass].alloc_total)) {
|
|
rpmalloc_assert(!atomic_load32(&heap->size_class_use[iclass].free_total), "Heap statistics counter mismatch");
|
|
rpmalloc_assert(!atomic_load32(&heap->size_class_use[iclass].spans_map_calls), "Heap statistics counter mismatch");
|
|
continue;
|
|
}
|
|
need_dump = 1;
|
|
}
|
|
for (size_t iclass = 0; !need_dump && (iclass < LARGE_CLASS_COUNT); ++iclass) {
|
|
if (!atomic_load32(&heap->span_use[iclass].high) && !atomic_load32(&heap->span_use[iclass].spans_map_calls))
|
|
continue;
|
|
need_dump = 1;
|
|
}
|
|
if (need_dump)
|
|
_memory_heap_dump_statistics(heap, file);
|
|
heap = heap->next_heap;
|
|
}
|
|
}
|
|
fprintf(file, "Global stats:\n");
|
|
size_t huge_current = (size_t)atomic_load32(&_huge_pages_current) * _memory_page_size;
|
|
size_t huge_peak = (size_t)_huge_pages_peak * _memory_page_size;
|
|
fprintf(file, "HugeCurrentMiB HugePeakMiB\n");
|
|
fprintf(file, "%14zu %11zu\n", huge_current / (size_t)(1024 * 1024), huge_peak / (size_t)(1024 * 1024));
|
|
|
|
fprintf(file, "GlobalCacheMiB\n");
|
|
for (size_t iclass = 0; iclass < LARGE_CLASS_COUNT; ++iclass) {
|
|
global_cache_t* cache = _memory_span_cache + iclass;
|
|
size_t global_cache = (size_t)cache->count * iclass * _memory_span_size;
|
|
|
|
size_t global_overflow_cache = 0;
|
|
span_t* span = cache->overflow;
|
|
while (span) {
|
|
global_overflow_cache += iclass * _memory_span_size;
|
|
span = span->next;
|
|
}
|
|
if (global_cache || global_overflow_cache || cache->insert_count || cache->extract_count)
|
|
fprintf(file, "%4zu: %8zuMiB (%8zuMiB overflow) %14zu insert %14zu extract\n", iclass + 1, global_cache / (size_t)(1024 * 1024), global_overflow_cache / (size_t)(1024 * 1024), cache->insert_count, cache->extract_count);
|
|
}
|
|
|
|
size_t mapped = (size_t)atomic_load32(&_mapped_pages) * _memory_page_size;
|
|
size_t mapped_os = (size_t)atomic_load32(&_mapped_pages_os) * _memory_page_size;
|
|
size_t mapped_peak = (size_t)_mapped_pages_peak * _memory_page_size;
|
|
size_t mapped_total = (size_t)atomic_load32(&_mapped_total) * _memory_page_size;
|
|
size_t unmapped_total = (size_t)atomic_load32(&_unmapped_total) * _memory_page_size;
|
|
fprintf(file, "MappedMiB MappedOSMiB MappedPeakMiB MappedTotalMiB UnmappedTotalMiB\n");
|
|
fprintf(file, "%9zu %11zu %13zu %14zu %16zu\n",
|
|
mapped / (size_t)(1024 * 1024),
|
|
mapped_os / (size_t)(1024 * 1024),
|
|
mapped_peak / (size_t)(1024 * 1024),
|
|
mapped_total / (size_t)(1024 * 1024),
|
|
unmapped_total / (size_t)(1024 * 1024));
|
|
|
|
fprintf(file, "\n");
|
|
#if 0
|
|
int64_t allocated = atomic_load64(&_allocation_counter);
|
|
int64_t deallocated = atomic_load64(&_deallocation_counter);
|
|
fprintf(file, "Allocation count: %lli\n", allocated);
|
|
fprintf(file, "Deallocation count: %lli\n", deallocated);
|
|
fprintf(file, "Current allocations: %lli\n", (allocated - deallocated));
|
|
fprintf(file, "Master spans: %d\n", atomic_load32(&_master_spans));
|
|
fprintf(file, "Dangling master spans: %d\n", atomic_load32(&_unmapped_master_spans));
|
|
#endif
|
|
#endif
|
|
(void)sizeof(file);
|
|
}
|
|
|
|
#if RPMALLOC_FIRST_CLASS_HEAPS
|
|
|
|
extern inline rpmalloc_heap_t*
|
|
rpmalloc_heap_acquire(void) {
|
|
// Must be a pristine heap from newly mapped memory pages, or else memory blocks
|
|
// could already be allocated from the heap which would (wrongly) be released when
|
|
// heap is cleared with rpmalloc_heap_free_all(). Also heaps guaranteed to be
|
|
// pristine from the dedicated orphan list can be used.
|
|
heap_t* heap = _rpmalloc_heap_allocate(1);
|
|
heap->owner_thread = 0;
|
|
_rpmalloc_stat_inc(&_memory_active_heaps);
|
|
return heap;
|
|
}
|
|
|
|
extern inline void
|
|
rpmalloc_heap_release(rpmalloc_heap_t* heap) {
|
|
if (heap)
|
|
_rpmalloc_heap_release(heap, 1, 1);
|
|
}
|
|
|
|
extern inline RPMALLOC_ALLOCATOR void*
|
|
rpmalloc_heap_alloc(rpmalloc_heap_t* heap, size_t size) {
|
|
#if ENABLE_VALIDATE_ARGS
|
|
if (size >= MAX_ALLOC_SIZE) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#endif
|
|
return _rpmalloc_allocate(heap, size);
|
|
}
|
|
|
|
extern inline RPMALLOC_ALLOCATOR void*
|
|
rpmalloc_heap_aligned_alloc(rpmalloc_heap_t* heap, size_t alignment, size_t size) {
|
|
#if ENABLE_VALIDATE_ARGS
|
|
if (size >= MAX_ALLOC_SIZE) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#endif
|
|
return _rpmalloc_aligned_allocate(heap, alignment, size);
|
|
}
|
|
|
|
extern inline RPMALLOC_ALLOCATOR void*
|
|
rpmalloc_heap_calloc(rpmalloc_heap_t* heap, size_t num, size_t size) {
|
|
return rpmalloc_heap_aligned_calloc(heap, 0, num, size);
|
|
}
|
|
|
|
extern inline RPMALLOC_ALLOCATOR void*
|
|
rpmalloc_heap_aligned_calloc(rpmalloc_heap_t* heap, size_t alignment, size_t num, size_t size) {
|
|
size_t total;
|
|
#if ENABLE_VALIDATE_ARGS
|
|
#if PLATFORM_WINDOWS
|
|
int err = SizeTMult(num, size, &total);
|
|
if ((err != S_OK) || (total >= MAX_ALLOC_SIZE)) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#else
|
|
int err = __builtin_umull_overflow(num, size, &total);
|
|
if (err || (total >= MAX_ALLOC_SIZE)) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#endif
|
|
#else
|
|
total = num * size;
|
|
#endif
|
|
void* block = _rpmalloc_aligned_allocate(heap, alignment, total);
|
|
if (block)
|
|
memset(block, 0, total);
|
|
return block;
|
|
}
|
|
|
|
extern inline RPMALLOC_ALLOCATOR void*
|
|
rpmalloc_heap_realloc(rpmalloc_heap_t* heap, void* ptr, size_t size, unsigned int flags) {
|
|
#if ENABLE_VALIDATE_ARGS
|
|
if (size >= MAX_ALLOC_SIZE) {
|
|
errno = EINVAL;
|
|
return ptr;
|
|
}
|
|
#endif
|
|
return _rpmalloc_reallocate(heap, ptr, size, 0, flags);
|
|
}
|
|
|
|
extern inline RPMALLOC_ALLOCATOR void*
|
|
rpmalloc_heap_aligned_realloc(rpmalloc_heap_t* heap, void* ptr, size_t alignment, size_t size, unsigned int flags) {
|
|
#if ENABLE_VALIDATE_ARGS
|
|
if ((size + alignment < size) || (alignment > _memory_page_size)) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
#endif
|
|
return _rpmalloc_aligned_reallocate(heap, ptr, alignment, size, 0, flags);
|
|
}
|
|
|
|
extern inline void
|
|
rpmalloc_heap_free(rpmalloc_heap_t* heap, void* ptr) {
|
|
(void)sizeof(heap);
|
|
_rpmalloc_deallocate(ptr);
|
|
}
|
|
|
|
extern inline void
|
|
rpmalloc_heap_free_all(rpmalloc_heap_t* heap) {
|
|
span_t* span;
|
|
span_t* next_span;
|
|
|
|
_rpmalloc_heap_cache_adopt_deferred(heap, 0);
|
|
|
|
for (size_t iclass = 0; iclass < SIZE_CLASS_COUNT; ++iclass) {
|
|
span = heap->size_class[iclass].partial_span;
|
|
while (span) {
|
|
next_span = span->next;
|
|
_rpmalloc_heap_cache_insert(heap, span);
|
|
span = next_span;
|
|
}
|
|
heap->size_class[iclass].partial_span = 0;
|
|
span = heap->full_span[iclass];
|
|
while (span) {
|
|
next_span = span->next;
|
|
_rpmalloc_heap_cache_insert(heap, span);
|
|
span = next_span;
|
|
}
|
|
}
|
|
memset(heap->size_class, 0, sizeof(heap->size_class));
|
|
memset(heap->full_span, 0, sizeof(heap->full_span));
|
|
|
|
span = heap->large_huge_span;
|
|
while (span) {
|
|
next_span = span->next;
|
|
if (UNEXPECTED(span->size_class == SIZE_CLASS_HUGE))
|
|
_rpmalloc_deallocate_huge(span);
|
|
else
|
|
_rpmalloc_heap_cache_insert(heap, span);
|
|
span = next_span;
|
|
}
|
|
heap->large_huge_span = 0;
|
|
heap->full_span_count = 0;
|
|
|
|
#if ENABLE_THREAD_CACHE
|
|
for (size_t iclass = 0; iclass < LARGE_CLASS_COUNT; ++iclass) {
|
|
span_cache_t* span_cache;
|
|
if (!iclass)
|
|
span_cache = &heap->span_cache;
|
|
else
|
|
span_cache = (span_cache_t*)(heap->span_large_cache + (iclass - 1));
|
|
if (!span_cache->count)
|
|
continue;
|
|
#if ENABLE_GLOBAL_CACHE
|
|
_rpmalloc_stat_add64(&heap->thread_to_global, span_cache->count * (iclass + 1) * _memory_span_size);
|
|
_rpmalloc_stat_add(&heap->span_use[iclass].spans_to_global, span_cache->count);
|
|
_rpmalloc_global_cache_insert_spans(span_cache->span, iclass + 1, span_cache->count);
|
|
#else
|
|
for (size_t ispan = 0; ispan < span_cache->count; ++ispan)
|
|
_rpmalloc_span_unmap(span_cache->span[ispan]);
|
|
#endif
|
|
span_cache->count = 0;
|
|
}
|
|
#endif
|
|
|
|
#if ENABLE_STATISTICS
|
|
for (size_t iclass = 0; iclass < SIZE_CLASS_COUNT; ++iclass) {
|
|
atomic_store32(&heap->size_class_use[iclass].alloc_current, 0);
|
|
atomic_store32(&heap->size_class_use[iclass].spans_current, 0);
|
|
}
|
|
for (size_t iclass = 0; iclass < LARGE_CLASS_COUNT; ++iclass) {
|
|
atomic_store32(&heap->span_use[iclass].current, 0);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
extern inline void
|
|
rpmalloc_heap_thread_set_current(rpmalloc_heap_t* heap) {
|
|
heap_t* prev_heap = get_thread_heap_raw();
|
|
if (prev_heap != heap) {
|
|
set_thread_heap(heap);
|
|
if (prev_heap)
|
|
rpmalloc_heap_release(prev_heap);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
#endif
|