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ANDROID: vendor_hooks: Add hook in kmalloc_slab()

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Add hook in kmalloc_slab() for debug kmalloc slab memory leak.

Bug: 197614797

Signed-off-by: Liujie Xie <xieliujie@oppo.com>
Change-Id: I402a9f968f2bf1e75daa461c05a53a8fabf70028
This commit is contained in:
Liujie Xie
2021-08-25 02:26:18 +08:00
committed by Suren Baghdasaryan
parent 73839b71c8
commit 94fbab9d6c
2 changed files with 8 additions and 0 deletions
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3
include/trace/hooks/mm.h
View File

@@ -117,6 +117,9 @@ DECLARE_HOOK(android_vh_mem_cgroup_css_online,
DECLARE_HOOK(android_vh_mem_cgroup_css_offline, DECLARE_HOOK(android_vh_mem_cgroup_css_offline,
TP_PROTO(struct cgroup_subsys_state *css, struct mem_cgroup *memcg), TP_PROTO(struct cgroup_subsys_state *css, struct mem_cgroup *memcg),
TP_ARGS(css, memcg)); TP_ARGS(css, memcg));
DECLARE_HOOK(android_vh_kmalloc_slab,
TP_PROTO(unsigned int index, gfp_t flags, struct kmem_cache **s),
TP_ARGS(index, flags, s));
/* macro versions of hooks are no longer required */ /* macro versions of hooks are no longer required */
#endif /* _TRACE_HOOK_MM_H */ #endif /* _TRACE_HOOK_MM_H */

5
mm/slab_common.c
View File

@@ -641,6 +641,7 @@ static inline unsigned int size_index_elem(unsigned int bytes)
struct kmem_cache *kmalloc_slab(size_t size, gfp_t flags) struct kmem_cache *kmalloc_slab(size_t size, gfp_t flags)
{ {
unsigned int index; unsigned int index;
struct kmem_cache *s = NULL;
if (size <= 192) { if (size <= 192) {
if (!size) if (!size)
@@ -653,6 +654,10 @@ struct kmem_cache *kmalloc_slab(size_t size, gfp_t flags)
index = fls(size - 1); index = fls(size - 1);
} }
trace_android_vh_kmalloc_slab(index, flags, &s);
if (s)
return s;
return kmalloc_caches[kmalloc_type(flags)][index]; return kmalloc_caches[kmalloc_type(flags)][index];
} }