Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932465AbWEMQGn (ORCPT ); Sat, 13 May 2006 12:06:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932476AbWEMQGc (ORCPT ); Sat, 13 May 2006 12:06:32 -0400 Received: from mta08-winn.ispmail.ntl.com ([81.103.221.48]:64542 "EHLO mtaout02-winn.ispmail.ntl.com") by vger.kernel.org with ESMTP id S932465AbWEMQGJ (ORCPT ); Sat, 13 May 2006 12:06:09 -0400 From: Catalin Marinas Subject: [PATCH 2.6.17-rc4 3/6] Add the memory allocation/freeing hooks for kmemleak Date: Sat, 13 May 2006 17:06:05 +0100 To: linux-kernel@vger.kernel.org Message-Id: <20060513160605.8848.57802.stgit@localhost.localdomain> In-Reply-To: <20060513155757.8848.11980.stgit@localhost.localdomain> References: <20060513155757.8848.11980.stgit@localhost.localdomain> Content-Type: text/plain; charset=utf-8; format=fixed Content-Transfer-Encoding: 8bit User-Agent: StGIT/0.9 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5762 Lines: 213 From: Catalin Marinas This patch adds the callbacks to memleak_(alloc|free) functions from kmalloc/kree, kmem_cache_(alloc|free), vmalloc/vfree etc. Signed-off-by: Catalin Marinas --- include/linux/slab.h | 4 ++++ mm/page_alloc.c | 3 +++ mm/slab.c | 30 ++++++++++++++++++++++++++---- mm/vmalloc.c | 20 ++++++++++++++++++-- 4 files changed, 51 insertions(+), 6 deletions(-) diff --git a/include/linux/slab.h b/include/linux/slab.h index 3af03b1..4a573ff 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -89,6 +89,7 @@ #endif static inline void *kmalloc(size_t size, gfp_t flags) { +#ifndef CONFIG_DEBUG_MEMLEAK if (__builtin_constant_p(size)) { int i = 0; #define CACHE(x) \ @@ -107,6 +108,7 @@ found: malloc_sizes[i].cs_dmacachep : malloc_sizes[i].cs_cachep, flags); } +#endif return __kmalloc(size, flags); } @@ -114,6 +116,7 @@ extern void *__kzalloc(size_t, gfp_t); static inline void *kzalloc(size_t size, gfp_t flags) { +#ifndef CONFIG_DEBUG_MEMLEAK if (__builtin_constant_p(size)) { int i = 0; #define CACHE(x) \ @@ -132,6 +135,7 @@ found: malloc_sizes[i].cs_dmacachep : malloc_sizes[i].cs_cachep, flags); } +#endif return __kzalloc(size, flags); } diff --git a/mm/page_alloc.c b/mm/page_alloc.c index ea77c99..d511586 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2788,6 +2788,9 @@ void *__init alloc_large_system_hash(con if (_hash_mask) *_hash_mask = (1 << log2qty) - 1; +#ifdef CONFIG_DEBUG_MEMLEAK + memleak_alloc(table, size, 1); +#endif return table; } diff --git a/mm/slab.c b/mm/slab.c index c32af7e..5f4ebf4 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -434,6 +434,8 @@ #if DEBUG * variables contain the offset to the user object and its size. */ int obj_offset; +#endif +#if DEBUG || defined(CONFIG_DEBUG_MEMLEAK) int obj_size; #endif }; @@ -672,7 +674,7 @@ static struct kmem_cache cache_cache = { .shared = 1, .buffer_size = sizeof(struct kmem_cache), .name = "kmem_cache", -#if DEBUG +#if DEBUG || defined(CONFIG_DEBUG_MEMLEAK) .obj_size = sizeof(struct kmem_cache), #endif }; @@ -2034,9 +2036,11 @@ #endif if (!cachep) goto oops; -#if DEBUG +#if DEBUG || defined(CONFIG_DEBUG_MEMLEAK) cachep->obj_size = size; +#endif +#if DEBUG if (flags & SLAB_RED_ZONE) { /* redzoning only works with word aligned caches */ align = BYTES_PER_WORD; @@ -3133,7 +3137,11 @@ #endif */ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags) { - return __cache_alloc(cachep, flags, __builtin_return_address(0)); + void *ptr = __cache_alloc(cachep, flags, __builtin_return_address(0)); +#ifdef CONFIG_DEBUG_MEMLEAK + memleak_alloc(ptr, cachep->obj_size, 1); +#endif + return ptr; } EXPORT_SYMBOL(kmem_cache_alloc); @@ -3148,6 +3156,9 @@ EXPORT_SYMBOL(kmem_cache_alloc); void *kmem_cache_zalloc(struct kmem_cache *cache, gfp_t flags) { void *ret = __cache_alloc(cache, flags, __builtin_return_address(0)); +#ifdef CONFIG_DEBUG_MEMLEAK + memleak_alloc(ret, cache->obj_size, 1); +#endif if (ret) memset(ret, 0, obj_size(cache)); return ret; @@ -3269,6 +3280,7 @@ static __always_inline void *__do_kmallo void *caller) { struct kmem_cache *cachep; + void *ptr; /* If you want to save a few bytes .text space: replace * __ with kmem_. @@ -3278,7 +3290,11 @@ static __always_inline void *__do_kmallo cachep = __find_general_cachep(size, flags); if (unlikely(cachep == NULL)) return NULL; - return __cache_alloc(cachep, flags, caller); + ptr = __cache_alloc(cachep, flags, caller); +#ifdef CONFIG_DEBUG_MEMLEAK + memleak_alloc(ptr, size, 1); +#endif + return ptr; } @@ -3362,6 +3378,9 @@ void kmem_cache_free(struct kmem_cache * unsigned long flags; local_irq_save(flags); +#ifdef CONFIG_DEBUG_MEMLEAK + memleak_free(objp); +#endif __cache_free(cachep, objp); local_irq_restore(flags); } @@ -3385,6 +3404,9 @@ void kfree(const void *objp) return; local_irq_save(flags); kfree_debugcheck(objp); +#ifdef CONFIG_DEBUG_MEMLEAK + memleak_free(objp); +#endif c = virt_to_cache(objp); mutex_debug_check_no_locks_freed(objp, obj_size(c)); __cache_free(c, (void *)objp); diff --git a/mm/vmalloc.c b/mm/vmalloc.c index c0504f1..ffd6154 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -349,6 +349,9 @@ void __vunmap(void *addr, int deallocate void vfree(void *addr) { BUG_ON(in_interrupt()); +#ifdef CONFIG_DEBUG_MEMLEAK + memleak_free(addr); +#endif __vunmap(addr, 1); } EXPORT_SYMBOL(vfree); @@ -447,7 +450,14 @@ fail: void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, pgprot_t prot) { - return __vmalloc_area_node(area, gfp_mask, prot, -1); + void *addr = __vmalloc_area_node(area, gfp_mask, prot, -1); +#ifdef CONFIG_DEBUG_MEMLEAK + /* this needs ref_count = 2 since vm_struct also contains a + pointer to this address. The guard page is also subtracted + from the size */ + memleak_alloc(addr, area->size - PAGE_SIZE, 2); +#endif + return addr; } /** @@ -481,7 +491,13 @@ EXPORT_SYMBOL(__vmalloc_node); void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot) { - return __vmalloc_node(size, gfp_mask, prot, -1); + void *addr = __vmalloc_node(size, gfp_mask, prot, -1); +#ifdef CONFIG_DEBUG_MEMLEAK + /* this needs ref_count = 2 since the vm_struct also contains + a pointer to this address */ + memleak_alloc(addr, size, 2); +#endif + return addr; } EXPORT_SYMBOL(__vmalloc); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/