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https://github.com/microsoft/mimalloc.git
synced 2025-07-08 04:18:42 +03:00
merge from dev
This commit is contained in:
daan
commit
ad47cab97c
142 changed files with 3326 additions and 1819 deletions
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@ -1,5 +1,5 @@
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/* ----------------------------------------------------------------------------
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Copyright (c) 2018-2021, Microsoft Research, Daan Leijen
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Copyright (c) 2018-2022, Microsoft Research, Daan Leijen
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This is free software; you can redistribute it and/or modify it under the
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terms of the MIT license. A copy of the license can be found in the file
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"LICENSE" at the root of this distribution.
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@ -43,6 +43,11 @@ terms of the MIT license. A copy of the license can be found in the file
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#define mi_decl_externc
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#endif
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#if !defined(_WIN32) && !defined(__wasi__)
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#define MI_USE_PTHREADS
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#include <pthread.h>
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#endif
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// "options.c"
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void _mi_fputs(mi_output_fun* out, void* arg, const char* prefix, const char* message);
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void _mi_fprintf(mi_output_fun* out, void* arg, const char* fmt, ...);
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@ -156,8 +161,8 @@ bool _mi_page_is_valid(mi_page_t* page);
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// ------------------------------------------------------
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#if defined(__GNUC__) || defined(__clang__)
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#define mi_unlikely(x) __builtin_expect((x),0)
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#define mi_likely(x) __builtin_expect((x),1)
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#define mi_unlikely(x) __builtin_expect(!!(x),false)
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#define mi_likely(x) __builtin_expect(!!(x),true)
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#else
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#define mi_unlikely(x) (x)
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#define mi_likely(x) (x)
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@ -249,11 +254,6 @@ static inline size_t _mi_wsize_from_size(size_t size) {
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return (size + sizeof(uintptr_t) - 1) / sizeof(uintptr_t);
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}
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// Does malloc satisfy the alignment constraints already?
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static inline bool mi_malloc_satisfies_alignment(size_t alignment, size_t size) {
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return (alignment == sizeof(void*) || (alignment == MI_MAX_ALIGN_SIZE && size > (MI_MAX_ALIGN_SIZE/2)));
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}
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// Overflow detecting multiply
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#if __has_builtin(__builtin_umul_overflow) || (defined(__GNUC__) && (__GNUC__ >= 5))
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#include <limits.h> // UINT_MAX, ULONG_MAX
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@ -304,7 +304,7 @@ We try to circumvent this in an efficient way:
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- macOSX : we use an unused TLS slot from the OS allocated slots (MI_TLS_SLOT). On OSX, the
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loader itself calls `malloc` even before the modules are initialized.
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- OpenBSD: we use an unused slot from the pthread block (MI_TLS_PTHREAD_SLOT_OFS).
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- DragonFly: the uniqueid use is buggy but kept for reference.
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- DragonFly: defaults are working but seem slow compared to freeBSD (see PR #323)
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------------------------------------------------------------------------------------------- */
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extern const mi_heap_t _mi_heap_empty; // read-only empty heap, initial value of the thread local default heap
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@ -321,16 +321,18 @@ mi_heap_t* _mi_heap_main_get(void); // statically allocated main backing hea
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// use end bytes of a name; goes wrong if anyone uses names > 23 characters (ptrhread specifies 16)
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// see <https://github.com/openbsd/src/blob/master/lib/libc/include/thread_private.h#L371>
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#define MI_TLS_PTHREAD_SLOT_OFS (6*sizeof(int) + 4*sizeof(void*) + 24)
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#elif defined(__DragonFly__)
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#warning "mimalloc is not working correctly on DragonFly yet."
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//#define MI_TLS_PTHREAD_SLOT_OFS (4 + 1*sizeof(void*)) // offset `uniqueid` (also used by gdb?) <https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/lib/libthread_xu/thread/thr_private.h#L458>
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// #elif defined(__DragonFly__)
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// #warning "mimalloc is not working correctly on DragonFly yet."
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// #define MI_TLS_PTHREAD_SLOT_OFS (4 + 1*sizeof(void*)) // offset `uniqueid` (also used by gdb?) <https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/lib/libthread_xu/thread/thr_private.h#L458>
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#elif defined(__ANDROID__)
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// See issue #381
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#define MI_TLS_PTHREAD
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#endif
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#endif
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#if defined(MI_TLS_SLOT)
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static inline void* mi_tls_slot(size_t slot) mi_attr_noexcept; // forward declaration
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#elif defined(MI_TLS_PTHREAD_SLOT_OFS)
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#include <pthread.h>
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static inline mi_heap_t** mi_tls_pthread_heap_slot(void) {
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pthread_t self = pthread_self();
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#if defined(__DragonFly__)
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@ -342,7 +344,6 @@ static inline mi_heap_t** mi_tls_pthread_heap_slot(void) {
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return (mi_heap_t**)((uint8_t*)self + MI_TLS_PTHREAD_SLOT_OFS);
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}
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#elif defined(MI_TLS_PTHREAD)
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#include <pthread.h>
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extern pthread_key_t _mi_heap_default_key;
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#endif
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@ -352,11 +353,15 @@ extern pthread_key_t _mi_heap_default_key;
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// However, on the Apple M1 we do use the address of this variable as the unique thread-id (issue #356).
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extern mi_decl_thread mi_heap_t* _mi_heap_default; // default heap to allocate from
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static inline mi_heap_t* mi_get_default_heap(void) {
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#if defined(MI_TLS_SLOT)
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mi_heap_t* heap = (mi_heap_t*)mi_tls_slot(MI_TLS_SLOT);
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if (mi_unlikely(heap == NULL)) { heap = (mi_heap_t*)&_mi_heap_empty; } //_mi_heap_empty_get(); }
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if (mi_unlikely(heap == NULL)) {
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#ifdef __GNUC__
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__asm(""); // prevent conditional load of the address of _mi_heap_empty
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#endif
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heap = (mi_heap_t*)&_mi_heap_empty;
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}
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return heap;
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#elif defined(MI_TLS_PTHREAD_SLOT_OFS)
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mi_heap_t* heap = *mi_tls_pthread_heap_slot();
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@ -705,8 +710,10 @@ static inline size_t _mi_os_numa_node_count(void) {
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// -------------------------------------------------------------------
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// Getting the thread id should be performant as it is called in the
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// fast path of `_mi_free` and we specialize for various platforms.
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// We only require _mi_threadid() to return a unique id for each thread.
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// -------------------------------------------------------------------
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#if defined(_WIN32)
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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static inline mi_threadid_t _mi_thread_id(void) mi_attr_noexcept {
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@ -714,81 +721,93 @@ static inline mi_threadid_t _mi_thread_id(void) mi_attr_noexcept {
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return (uintptr_t)NtCurrentTeb();
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}
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#elif defined(__GNUC__) && \
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(defined(__x86_64__) || defined(__i386__) || defined(__arm__) || defined(__aarch64__))
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// We use assembly for a fast thread id on the main platforms. The TLS layout depends on
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// both the OS and libc implementation so we use specific tests for each main platform.
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// If you test on another platform and it works please send a PR :-)
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// see also https://akkadia.org/drepper/tls.pdf for more info on the TLS register.
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#elif defined(__GNUC__) && ( \
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(defined(__GLIBC__) && (defined(__x86_64__) || defined(__i386__) || defined(__arm__) || defined(__aarch64__))) \
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|| (defined(__APPLE__) && (defined(__x86_64__) || defined(__aarch64__))) \
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|| (defined(__BIONIC__) && (defined(__x86_64__) || defined(__i386__) || defined(__arm__) || defined(__aarch64__))) \
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|| (defined(__FreeBSD__) && (defined(__x86_64__) || defined(__i386__) || defined(__aarch64__))) \
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)
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// TLS register on x86 is in the FS or GS register, see: https://akkadia.org/drepper/tls.pdf
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static inline void* mi_tls_slot(size_t slot) mi_attr_noexcept {
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void* res;
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const size_t ofs = (slot*sizeof(void*));
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#if defined(__i386__)
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__asm__("movl %%gs:%1, %0" : "=r" (res) : "m" (*((void**)ofs)) : ); // 32-bit always uses GS
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#elif defined(__APPLE__) && defined(__x86_64__)
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__asm__("movq %%gs:%1, %0" : "=r" (res) : "m" (*((void**)ofs)) : ); // x86_64 macOSX uses GS
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#elif defined(__x86_64__) && (MI_INTPTR_SIZE==4)
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__asm__("movl %%fs:%1, %0" : "=r" (res) : "m" (*((void**)ofs)) : ); // x32 ABI
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#elif defined(__x86_64__)
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__asm__("movq %%fs:%1, %0" : "=r" (res) : "m" (*((void**)ofs)) : ); // x86_64 Linux, BSD uses FS
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#elif defined(__arm__)
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void** tcb; MI_UNUSED(ofs);
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__asm__ volatile ("mrc p15, 0, %0, c13, c0, 3\nbic %0, %0, #3" : "=r" (tcb));
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res = tcb[slot];
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#elif defined(__aarch64__)
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void** tcb; MI_UNUSED(ofs);
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#if defined(__APPLE__) // M1, issue #343
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__asm__ volatile ("mrs %0, tpidrro_el0" : "=r" (tcb));
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tcb = (void**)((uintptr_t)tcb & ~0x07UL); // clear lower 3 bits
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#else
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__asm__ volatile ("mrs %0, tpidr_el0" : "=r" (tcb));
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#if defined(__i386__)
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__asm__("movl %%gs:%1, %0" : "=r" (res) : "m" (*((void**)ofs)) : ); // x86 32-bit always uses GS
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#elif defined(__APPLE__) && defined(__x86_64__)
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__asm__("movq %%gs:%1, %0" : "=r" (res) : "m" (*((void**)ofs)) : ); // x86_64 macOSX uses GS
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#elif defined(__x86_64__) && (MI_INTPTR_SIZE==4)
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__asm__("movl %%fs:%1, %0" : "=r" (res) : "m" (*((void**)ofs)) : ); // x32 ABI
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#elif defined(__x86_64__)
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__asm__("movq %%fs:%1, %0" : "=r" (res) : "m" (*((void**)ofs)) : ); // x86_64 Linux, BSD uses FS
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#elif defined(__arm__)
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void** tcb; MI_UNUSED(ofs);
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__asm__ volatile ("mrc p15, 0, %0, c13, c0, 3\nbic %0, %0, #3" : "=r" (tcb));
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res = tcb[slot];
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#elif defined(__aarch64__)
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void** tcb; MI_UNUSED(ofs);
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#if defined(__APPLE__) // M1, issue #343
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__asm__ volatile ("mrs %0, tpidrro_el0\nbic %0, %0, #7" : "=r" (tcb));
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#else
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__asm__ volatile ("mrs %0, tpidr_el0" : "=r" (tcb));
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#endif
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res = tcb[slot];
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#endif
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res = tcb[slot];
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#endif
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return res;
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}
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// setting is only used on macOSX for now
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// setting a tls slot is only used on macOS for now
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static inline void mi_tls_slot_set(size_t slot, void* value) mi_attr_noexcept {
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const size_t ofs = (slot*sizeof(void*));
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#if defined(__i386__)
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__asm__("movl %1,%%gs:%0" : "=m" (*((void**)ofs)) : "rn" (value) : ); // 32-bit always uses GS
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#elif defined(__APPLE__) && defined(__x86_64__)
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__asm__("movq %1,%%gs:%0" : "=m" (*((void**)ofs)) : "rn" (value) : ); // x86_64 macOSX uses GS
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#elif defined(__x86_64__) && (MI_INTPTR_SIZE==4)
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__asm__("movl %1,%%fs:%0" : "=m" (*((void**)ofs)) : "rn" (value) : ); // x32 ABI
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#elif defined(__x86_64__)
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__asm__("movq %1,%%fs:%0" : "=m" (*((void**)ofs)) : "rn" (value) : ); // x86_64 Linux, BSD uses FS
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#elif defined(__arm__)
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void** tcb; MI_UNUSED(ofs);
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__asm__ volatile ("mrc p15, 0, %0, c13, c0, 3\nbic %0, %0, #3" : "=r" (tcb));
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tcb[slot] = value;
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#elif defined(__aarch64__)
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void** tcb; MI_UNUSED(ofs);
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#if defined(__APPLE__) // M1, issue #343
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__asm__ volatile ("mrs %0, tpidrro_el0" : "=r" (tcb));
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tcb = (void**)((uintptr_t)tcb & ~0x07UL); // clear lower 3 bits
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#else
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__asm__ volatile ("mrs %0, tpidr_el0" : "=r" (tcb));
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#if defined(__i386__)
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__asm__("movl %1,%%gs:%0" : "=m" (*((void**)ofs)) : "rn" (value) : ); // 32-bit always uses GS
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#elif defined(__APPLE__) && defined(__x86_64__)
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__asm__("movq %1,%%gs:%0" : "=m" (*((void**)ofs)) : "rn" (value) : ); // x86_64 macOS uses GS
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#elif defined(__x86_64__) && (MI_INTPTR_SIZE==4)
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__asm__("movl %1,%%fs:%0" : "=m" (*((void**)ofs)) : "rn" (value) : ); // x32 ABI
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#elif defined(__x86_64__)
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__asm__("movq %1,%%fs:%0" : "=m" (*((void**)ofs)) : "rn" (value) : ); // x86_64 Linux, BSD uses FS
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#elif defined(__arm__)
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void** tcb; MI_UNUSED(ofs);
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__asm__ volatile ("mrc p15, 0, %0, c13, c0, 3\nbic %0, %0, #3" : "=r" (tcb));
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tcb[slot] = value;
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#elif defined(__aarch64__)
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void** tcb; MI_UNUSED(ofs);
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#if defined(__APPLE__) // M1, issue #343
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__asm__ volatile ("mrs %0, tpidrro_el0\nbic %0, %0, #7" : "=r" (tcb));
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#else
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__asm__ volatile ("mrs %0, tpidr_el0" : "=r" (tcb));
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#endif
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tcb[slot] = value;
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#endif
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tcb[slot] = value;
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#endif
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}
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static inline mi_threadid_t _mi_thread_id(void) mi_attr_noexcept {
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#if defined(__BIONIC__) && (defined(__arm__) || defined(__aarch64__))
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// on Android, slot 1 is the thread ID (pointer to pthread internal struct)
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return (uintptr_t)mi_tls_slot(1);
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#else
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// in all our other targets, slot 0 is the pointer to the thread control block
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return (uintptr_t)mi_tls_slot(0);
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#endif
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#if defined(__BIONIC__)
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// issue #384, #495: on the Bionic libc (Android), slot 1 is the thread id
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// see: https://github.com/aosp-mirror/platform_bionic/blob/c44b1d0676ded732df4b3b21c5f798eacae93228/libc/platform/bionic/tls_defines.h#L86
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return (uintptr_t)mi_tls_slot(1);
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#else
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// in all our other targets, slot 0 is the thread id
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// glibc: https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=sysdeps/x86_64/nptl/tls.h
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// apple: https://github.com/apple/darwin-xnu/blob/main/libsyscall/os/tsd.h#L36
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return (uintptr_t)mi_tls_slot(0);
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#endif
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}
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#else
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// otherwise use standard C
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// otherwise use portable C, taking the address of a thread local variable (this is still very fast on most platforms).
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static inline mi_threadid_t _mi_thread_id(void) mi_attr_noexcept {
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return (uintptr_t)&_mi_heap_default;
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}
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#endif
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// -----------------------------------------------------------------------
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// Count bits: trailing or leading zeros (with MI_INTPTR_BITS on all zero)
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// -----------------------------------------------------------------------
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