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radix tree test suite: Introduce kmalloc_verbose 

To help track down where memory leaks may be, add the ability to turn
on/off printing allocations, frees and delayed frees.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
This commit is contained in:
Matthew Wilcox 2016-12-24 07:49:18 -05:00
parent d3e709e63e
commit 5eeb2d23df
2 changed files with 26 additions and 0 deletions
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9
tools/testing/radix-tree/linux.c
View File

@ -13,6 +13,7 @@
int nr_allocated;
int preempt_count;
int kmalloc_verbose;
struct kmem_cache {
pthread_mutex_t lock;
@ -44,6 +45,8 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, int flags)
}
uatomic_inc(&nr_allocated);
if (kmalloc_verbose)
printf("Allocating %p from slab\n", node);
return node;
}
@ -51,6 +54,8 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp)
{
assert(objp);
uatomic_dec(&nr_allocated);
if (kmalloc_verbose)
printf("Freeing %p to slab\n", objp);
pthread_mutex_lock(&cachep->lock);
if (cachep->nr_objs > 10) {
memset(objp, POISON_FREE, cachep->size);
@ -68,6 +73,8 @@ void *kmalloc(size_t size, gfp_t gfp)
{
void *ret = malloc(size);
uatomic_inc(&nr_allocated);
if (kmalloc_verbose)
printf("Allocating %p from malloc\n", ret);
return ret;
}
@ -76,6 +83,8 @@ void kfree(void *p)
if (!p)
return;
uatomic_dec(&nr_allocated);
if (kmalloc_verbose)
printf("Freeing %p to malloc\n", p);
free(p);
}

17
tools/testing/radix-tree/linux/radix-tree.h
View File

@ -1 +1,18 @@
#ifndef _TEST_RADIX_TREE_H
#define _TEST_RADIX_TREE_H
#include "../../../../include/linux/radix-tree.h"
extern int kmalloc_verbose;
static inline void trace_call_rcu(struct rcu_head *head,
void (*func)(struct rcu_head *head))
{
if (kmalloc_verbose)
printf("Delaying free of %p to slab\n", (char *)head -
offsetof(struct radix_tree_node, rcu_head));
call_rcu(head, func);
}
#undef call_rcu
#define call_rcu(x, y) trace_call_rcu(x, y)
#endif /* _TEST_RADIX_TREE_H */