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https://github.com/microsoft/mimalloc.git
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Merge branch 'dev' into dev-slice
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daan
commit
3eac4a912c
@ -786,8 +786,10 @@ 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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@ -795,81 +797,93 @@ 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(__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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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)) : ); // 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__) // arm32: defined but currently not used (see issue #495)
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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 a tls slot 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(__ANDROID__) && (defined(__arm__) || defined(__aarch64__))
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// issue #384, #495: on arm 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 portable 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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@ -254,7 +254,7 @@ typedef struct mi_heap_area_s {
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void* blocks; // start of the area containing heap blocks
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size_t reserved; // bytes reserved for this area (virtual)
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size_t committed; // current available bytes for this area
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size_t used; // bytes in use by allocated blocks
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size_t used; // number of allocated blocks
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size_t block_size; // size in bytes of each block
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} mi_heap_area_t;
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