diff options
Diffstat (limited to 'libc/stdlib')
| -rw-r--r-- | libc/stdlib/malloc/free.c | 29 | ||||
| -rw-r--r-- | libc/stdlib/malloc/heap.h | 5 | ||||
| -rw-r--r-- | libc/stdlib/malloc/heap_debug.c | 12 | ||||
| -rw-r--r-- | libc/stdlib/malloc/malloc.c | 26 | ||||
| -rw-r--r-- | libc/stdlib/malloc/malloc.h | 2 | ||||
| -rw-r--r-- | libc/stdlib/malloc/realloc.c | 8 |
6 files changed, 59 insertions, 23 deletions
diff --git a/libc/stdlib/malloc/free.c b/libc/stdlib/malloc/free.c index fd29690ad..4713b0624 100644 --- a/libc/stdlib/malloc/free.c +++ b/libc/stdlib/malloc/free.c @@ -22,7 +22,11 @@ libc_hidden_proto(sbrk) #include "heap.h" static void +#ifdef HEAP_USE_LOCKING free_to_heap (void *mem, struct heap_free_area *heap, malloc_mutex_t *heap_lock) +#else +free_to_heap (void *mem, struct heap_free_area *heap) +#endif { size_t size; struct heap_free_area *fa; @@ -39,7 +43,7 @@ free_to_heap (void *mem, struct heap_free_area *heap, malloc_mutex_t *heap_lock) size = MALLOC_SIZE (mem); mem = MALLOC_BASE (mem); - __pthread_mutex_lock (heap_lock); + __heap_do_lock (heap_lock); /* Put MEM back in the heap, and get the free-area it was placed in. */ fa = __heap_free (heap, mem, size); @@ -48,7 +52,7 @@ free_to_heap (void *mem, struct heap_free_area *heap, malloc_mutex_t *heap_lock) unmapped. */ if (HEAP_FREE_AREA_SIZE (fa) < MALLOC_UNMAP_THRESHOLD) /* Nope, nothing left to do, just release the lock. */ - __pthread_mutex_unlock (heap_lock); + __heap_do_unlock (heap_lock); else /* Yup, try to unmap FA. */ { @@ -81,7 +85,7 @@ free_to_heap (void *mem, struct heap_free_area *heap, malloc_mutex_t *heap_lock) MALLOC_DEBUG (-1, "not unmapping: 0x%lx - 0x%lx (%ld bytes)", start, end, end - start); __malloc_unlock_sbrk (); - __pthread_mutex_unlock (heap_lock); + __heap_do_unlock (heap_lock); return; } #endif @@ -108,7 +112,7 @@ free_to_heap (void *mem, struct heap_free_area *heap, malloc_mutex_t *heap_lock) #ifdef MALLOC_USE_SBRK /* Release the heap lock; we're still holding the sbrk lock. */ - __pthread_mutex_unlock (heap_lock); + __heap_do_unlock (heap_lock); /* Lower the brk. */ sbrk (start - end); /* Release the sbrk lock too; now we hold no locks. */ @@ -172,15 +176,20 @@ free_to_heap (void *mem, struct heap_free_area *heap, malloc_mutex_t *heap_lock) /* We have to unlock the heap before we recurse to free the mmb descriptor, because we might be unmapping from the mmb heap. */ - __pthread_mutex_unlock (heap_lock); + __heap_do_unlock (heap_lock); +#ifdef HEAP_USE_LOCKING /* Release the descriptor block we used. */ free_to_heap (mmb, &__malloc_mmb_heap, &__malloc_mmb_heap_lock); +#else + /* Release the descriptor block we used. */ + free_to_heap (mmb, &__malloc_mmb_heap); +#endif /* Do the actual munmap. */ munmap ((void *)mmb_start, mmb_end - mmb_start); - __pthread_mutex_lock (heap_lock); + __heap_do_lock (heap_lock); # ifdef __UCLIBC_HAS_THREADS__ /* In a multi-threaded program, it's possible that PREV_MMB has @@ -213,7 +222,7 @@ free_to_heap (void *mem, struct heap_free_area *heap, malloc_mutex_t *heap_lock) } /* Finally release the lock for good. */ - __pthread_mutex_unlock (heap_lock); + __heap_do_unlock (heap_lock); MALLOC_MMB_DEBUG_INDENT (-1); @@ -243,7 +252,7 @@ free_to_heap (void *mem, struct heap_free_area *heap, malloc_mutex_t *heap_lock) } /* Release the heap lock before we do the system call. */ - __pthread_mutex_unlock (heap_lock); + __heap_do_unlock (heap_lock); if (unmap_end > unmap_start) /* Finally, actually unmap the memory. */ @@ -260,5 +269,9 @@ free_to_heap (void *mem, struct heap_free_area *heap, malloc_mutex_t *heap_lock) void free (void *mem) { +#ifdef HEAP_USE_LOCKING free_to_heap (mem, __malloc_heap, &__malloc_heap_lock); +#else + free_to_heap (mem, __malloc_heap); +#endif } diff --git a/libc/stdlib/malloc/heap.h b/libc/stdlib/malloc/heap.h index 8b05cded1..2a686b601 100644 --- a/libc/stdlib/malloc/heap.h +++ b/libc/stdlib/malloc/heap.h @@ -19,6 +19,11 @@ # include <pthread.h> # include <bits/uClibc_pthread.h> # define HEAP_USE_LOCKING +# define __heap_do_lock(heap_lock) __pthread_mutex_lock (heap_lock) +# define __heap_do_unlock(heap_lock) __pthread_mutex_unlock (heap_lock) +#else +# define __heap_do_lock(heap_lock) +# define __heap_do_unlock(heap_lock) #endif diff --git a/libc/stdlib/malloc/heap_debug.c b/libc/stdlib/malloc/heap_debug.c index a2a9f4ec1..59a1780cd 100644 --- a/libc/stdlib/malloc/heap_debug.c +++ b/libc/stdlib/malloc/heap_debug.c @@ -31,10 +31,10 @@ int __heap_debug = 0; static void -__heap_dump_freelist (struct heap *heap) +__heap_dump_freelist (struct heap_free_area *heap) { struct heap_free_area *fa; - for (fa = heap->free_areas; fa; fa = fa->next) + for (fa = heap; fa; fa = fa->next) __malloc_debug_printf (0, "0x%lx: 0x%lx - 0x%lx (%d)\tP=0x%lx, N=0x%lx", (long)fa, @@ -47,7 +47,7 @@ __heap_dump_freelist (struct heap *heap) /* Output a text representation of HEAP to stderr, labelling it with STR. */ void -__heap_dump (struct heap *heap, const char *str) +__heap_dump (struct heap_free_area *heap, const char *str) { static smallint recursed; @@ -69,7 +69,7 @@ __heap_dump (struct heap *heap, const char *str) /* Output an error message to stderr, and exit. STR is printed with the failure message. */ static void attribute_noreturn -__heap_check_failure (struct heap *heap, struct heap_free_area *fa, +__heap_check_failure (struct heap_free_area *heap, struct heap_free_area *fa, const char *str, char *fmt, ...) { va_list val; @@ -95,11 +95,11 @@ __heap_check_failure (struct heap *heap, struct heap_free_area *fa, /* Do some consistency checks on HEAP. If they fail, output an error message to stderr, and exit. STR is printed with the failure message. */ void -__heap_check (struct heap *heap, const char *str) +__heap_check (struct heap_free_area *heap, const char *str) { typedef unsigned long ul_t; struct heap_free_area *fa, *prev; - struct heap_free_area *first_fa = heap->free_areas; + struct heap_free_area *first_fa = heap; if (first_fa && first_fa->prev) __heap_check_failure (heap, first_fa, str, diff --git a/libc/stdlib/malloc/malloc.c b/libc/stdlib/malloc/malloc.c index 0caf012a2..d58d62d2d 100644 --- a/libc/stdlib/malloc/malloc.c +++ b/libc/stdlib/malloc/malloc.c @@ -27,7 +27,9 @@ libc_hidden_proto(sbrk) programs can do a little mallocing without mmaping in more space. */ HEAP_DECLARE_STATIC_FREE_AREA (initial_fa, 256); struct heap_free_area *__malloc_heap = HEAP_INIT_WITH_FA (initial_fa); +#ifdef HEAP_USE_LOCKING malloc_mutex_t __malloc_heap_lock = PTHREAD_MUTEX_INITIALIZER; +#endif #if defined(MALLOC_USE_LOCKING) && defined(MALLOC_USE_SBRK) /* A lock protecting our use of sbrk. */ @@ -45,12 +47,18 @@ struct malloc_mmb *__malloc_mmapped_blocks = 0; annoying ways. */ HEAP_DECLARE_STATIC_FREE_AREA (initial_mmb_fa, 48); /* enough for 3 mmbs */ struct heap_free_area *__malloc_mmb_heap = HEAP_INIT_WITH_FA (initial_mmb_fa); +#ifdef HEAP_USE_LOCKING malloc_mutex_t __malloc_mmb_heap_lock = PTHREAD_MUTEX_INITIALIZER; +#endif #endif /* __UCLIBC_UCLINUX_BROKEN_MUNMAP__ */ static void * +#ifdef HEAP_USE_LOCKING malloc_from_heap (size_t size, struct heap_free_area *heap, malloc_mutex_t *heap_lock) +#else +malloc_from_heap (size_t size, struct heap_free_area *heap) +#endif { void *mem; @@ -59,12 +67,12 @@ malloc_from_heap (size_t size, struct heap_free_area *heap, malloc_mutex_t *heap /* Include extra space to record the size of the allocated block. */ size += MALLOC_HEADER_SIZE; - __pthread_mutex_lock (heap_lock); + __heap_do_lock (heap_lock); /* First try to get memory that's already in our heap. */ mem = __heap_alloc (heap, &size); - __pthread_mutex_unlock (heap_lock); + __heap_do_unlock (heap_lock); if (unlikely (! mem)) /* We couldn't allocate from the heap, so grab some more @@ -128,7 +136,7 @@ malloc_from_heap (size_t size, struct heap_free_area *heap, malloc_mutex_t *heap (long)block, (long)block + block_size, block_size); /* Get back the heap lock. */ - __pthread_mutex_lock (heap_lock); + __heap_do_lock (heap_lock); /* Put BLOCK into the heap. */ __heap_free (heap, block, block_size); @@ -138,7 +146,7 @@ malloc_from_heap (size_t size, struct heap_free_area *heap, malloc_mutex_t *heap /* Try again to allocate. */ mem = __heap_alloc (heap, &size); - __pthread_mutex_unlock (heap_lock); + __heap_do_unlock (heap_lock); #if !defined(MALLOC_USE_SBRK) && defined(__UCLIBC_UCLINUX_BROKEN_MUNMAP__) /* Insert a record of BLOCK in sorted order into the @@ -150,7 +158,11 @@ malloc_from_heap (size_t size, struct heap_free_area *heap, malloc_mutex_t *heap if (block < mmb->mem) break; +#ifdef HEAP_USE_LOCKING new_mmb = malloc_from_heap (sizeof *new_mmb, __malloc_mmb_heap, &__malloc_mmb_heap_lock); +#else + new_mmb = malloc_from_heap (sizeof *new_mmb, __malloc_mmb_heap); +#endif new_mmb->next = mmb; new_mmb->mem = block; new_mmb->size = block_size; @@ -193,7 +205,7 @@ malloc (size_t size) __malloc_debug_init (); } if (__malloc_check) - __heap_check (&__malloc_heap, "malloc"); + __heap_check (__malloc_heap, "malloc"); #endif #ifdef __MALLOC_GLIBC_COMPAT__ @@ -209,7 +221,11 @@ malloc (size_t size) if (unlikely(((unsigned long)size > (unsigned long)(MALLOC_HEADER_SIZE*-2)))) goto oom; +#ifdef HEAP_USE_LOCKING mem = malloc_from_heap (size, __malloc_heap, &__malloc_heap_lock); +#else + mem = malloc_from_heap (size, __malloc_heap); +#endif if (unlikely (!mem)) { oom: diff --git a/libc/stdlib/malloc/malloc.h b/libc/stdlib/malloc/malloc.h index f49ed34e3..4bad93276 100644 --- a/libc/stdlib/malloc/malloc.h +++ b/libc/stdlib/malloc/malloc.h @@ -222,7 +222,9 @@ extern void __malloc_debug_printf (int indent, const char *fmt, ...); /* The malloc heap. */ extern struct heap_free_area *__malloc_heap; +#ifdef __UCLIBC_HAS_THREADS__ extern malloc_mutex_t __malloc_heap_lock; #ifdef __UCLIBC_UCLINUX_BROKEN_MUNMAP__ extern malloc_mutex_t __malloc_mmb_heap_lock; #endif +#endif diff --git a/libc/stdlib/malloc/realloc.c b/libc/stdlib/malloc/realloc.c index b3b5bae14..f12123aa9 100644 --- a/libc/stdlib/malloc/realloc.c +++ b/libc/stdlib/malloc/realloc.c @@ -59,9 +59,9 @@ realloc (void *mem, size_t new_size) { size_t extra = new_size - size; - __pthread_mutex_lock (&__malloc_heap_lock); + __heap_do_lock (&__malloc_heap_lock); extra = __heap_alloc_at (__malloc_heap, base_mem + size, extra); - __pthread_mutex_unlock (&__malloc_heap_lock); + __heap_do_unlock (&__malloc_heap_lock); if (extra) /* Record the changed size. */ @@ -82,9 +82,9 @@ realloc (void *mem, size_t new_size) else if (new_size + MALLOC_REALLOC_MIN_FREE_SIZE <= size) /* Shrink the block. */ { - __pthread_mutex_lock (&__malloc_heap_lock); + __heap_do_lock (&__malloc_heap_lock); __heap_free (__malloc_heap, base_mem + new_size, size - new_size); - __pthread_mutex_unlock (&__malloc_heap_lock); + __heap_do_unlock (&__malloc_heap_lock); MALLOC_SET_SIZE (base_mem, new_size); } |