1 files changed, 64 insertions, 7 deletions

diff --git a/mm/slab.c b/mm/slab.c
index 825c606..9ec66c3 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -102,6 +102,7 @@
 #include	<linux/cpu.h>
 #include	<linux/sysctl.h>
 #include	<linux/module.h>
+#include	<trace/kmemtrace.h>
 #include	<linux/rcupdate.h>
 #include	<linux/string.h>
 #include	<linux/uaccess.h>
@@ -568,6 +569,14 @@ static void **dbg_userword(struct kmem_cache *cachep, void *objp)
 
 #endif
 
+#ifdef CONFIG_KMEMTRACE
+size_t slab_buffer_size(struct kmem_cache *cachep)
+{
+	return cachep->buffer_size;
+}
+EXPORT_SYMBOL(slab_buffer_size);
+#endif
+
 /*
  * Do not go above this order unless 0 objects fit into the slab.
  */
@@ -3554,10 +3563,23 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp)
  */
 void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
 {
-	return __cache_alloc(cachep, flags, __builtin_return_address(0));
+	void *ret = __cache_alloc(cachep, flags, __builtin_return_address(0));
+
+	kmemtrace_mark_alloc(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret,
+			     obj_size(cachep), cachep->buffer_size, flags);
+
+	return ret;
 }
 EXPORT_SYMBOL(kmem_cache_alloc);
 
+#ifdef CONFIG_KMEMTRACE
+void *kmem_cache_alloc_notrace(struct kmem_cache *cachep, gfp_t flags)
+{
+	return __cache_alloc(cachep, flags, __builtin_return_address(0));
+}
+EXPORT_SYMBOL(kmem_cache_alloc_notrace);
+#endif
+
 /**
  * kmem_ptr_validate - check if an untrusted pointer might be a slab entry.
  * @cachep: the cache we're checking against
@@ -3602,23 +3624,47 @@ out:
 #ifdef CONFIG_NUMA
 void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid)
 {
-	return __cache_alloc_node(cachep, flags, nodeid,
-			__builtin_return_address(0));
+	void *ret = __cache_alloc_node(cachep, flags, nodeid,
+				       __builtin_return_address(0));
+
+	kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret,
+				  obj_size(cachep), cachep->buffer_size,
+				  flags, nodeid);
+
+	return ret;
 }
 EXPORT_SYMBOL(kmem_cache_alloc_node);
 
+#ifdef CONFIG_KMEMTRACE
+void *kmem_cache_alloc_node_notrace(struct kmem_cache *cachep,
+				    gfp_t flags,
+				    int nodeid)
+{
+	return __cache_alloc_node(cachep, flags, nodeid,
+				  __builtin_return_address(0));
+}
+EXPORT_SYMBOL(kmem_cache_alloc_node_notrace);
+#endif
+
 static __always_inline void *
 __do_kmalloc_node(size_t size, gfp_t flags, int node, void *caller)
 {
 	struct kmem_cache *cachep;
+	void *ret;
 
 	cachep = kmem_find_general_cachep(size, flags);
 	if (unlikely(ZERO_OR_NULL_PTR(cachep)))
 		return cachep;
-	return kmem_cache_alloc_node(cachep, flags, node);
+	ret = kmem_cache_alloc_node_notrace(cachep, flags, node);
+
+	kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
+				  (unsigned long) caller, ret,
+				  size, cachep->buffer_size, flags, node);
+
+	return ret;
 }
 
-#ifdef CONFIG_DEBUG_SLAB
+#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_KMEMTRACE)
 void *__kmalloc_node(size_t size, gfp_t flags, int node)
 {
 	return __do_kmalloc_node(size, flags, node,
@@ -3651,6 +3697,7 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags,
 					  void *caller)
 {
 	struct kmem_cache *cachep;
+	void *ret;
 
 	/* If you want to save a few bytes .text space: replace
 	 * __ with kmem_.
@@ -3660,11 +3707,17 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags,
 	cachep = __find_general_cachep(size, flags);
 	if (unlikely(ZERO_OR_NULL_PTR(cachep)))
 		return cachep;
-	return __cache_alloc(cachep, flags, caller);
+	ret = __cache_alloc(cachep, flags, caller);
+
+	kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC,
+			     (unsigned long) caller, ret,
+			     size, cachep->buffer_size, flags);
+
+	return ret;
 }
 
 
-#ifdef CONFIG_DEBUG_SLAB
+#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_KMEMTRACE)
 void *__kmalloc(size_t size, gfp_t flags)
 {
 	return __do_kmalloc(size, flags, __builtin_return_address(0));
@@ -3703,6 +3756,8 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp)
 		debug_check_no_obj_freed(objp, obj_size(cachep));
 	__cache_free(cachep, objp);
 	local_irq_restore(flags);
+
+	kmemtrace_mark_free(KMEMTRACE_TYPE_CACHE, _RET_IP_, objp);
 }
 EXPORT_SYMBOL(kmem_cache_free);
 
@@ -3729,6 +3784,8 @@ void kfree(const void *objp)
 	debug_check_no_obj_freed(objp, obj_size(c));
 	__cache_free(c, (void *)objp);
 	local_irq_restore(flags);
+
+	kmemtrace_mark_free(KMEMTRACE_TYPE_KMALLOC, _RET_IP_, objp);
 }
 EXPORT_SYMBOL(kfree);