mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-27 21:14:44 +08:00
d814567942
The update to kmem_cache_free trace event added printing of the slab name in
the trace event. But it only stores the pointer of the name which will be
printed as a string when the event is read some time in the future. This is
dangerous because the name could be freed in the mean time and when reading
the trace event it would try to dereference the string name by the pointer
to the name that has been freed.
Instead, use the trace event helper macros __string(), __assign_str(), and
__get_str() that are for this very case.
Cc: Jacob Wen <jian.w.wen@oracle.com>
Fixes: 3544de8ee6 ("mm, tracing: record slab name for kmem_cache_free()")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
378 lines
8.5 KiB
C
378 lines
8.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#undef TRACE_SYSTEM
|
|
#define TRACE_SYSTEM kmem
|
|
|
|
#if !defined(_TRACE_KMEM_H) || defined(TRACE_HEADER_MULTI_READ)
|
|
#define _TRACE_KMEM_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/tracepoint.h>
|
|
#include <trace/events/mmflags.h>
|
|
|
|
DECLARE_EVENT_CLASS(kmem_alloc,
|
|
|
|
TP_PROTO(unsigned long call_site,
|
|
const void *ptr,
|
|
size_t bytes_req,
|
|
size_t bytes_alloc,
|
|
gfp_t gfp_flags),
|
|
|
|
TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( unsigned long, call_site )
|
|
__field( const void *, ptr )
|
|
__field( size_t, bytes_req )
|
|
__field( size_t, bytes_alloc )
|
|
__field( gfp_t, gfp_flags )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->call_site = call_site;
|
|
__entry->ptr = ptr;
|
|
__entry->bytes_req = bytes_req;
|
|
__entry->bytes_alloc = bytes_alloc;
|
|
__entry->gfp_flags = gfp_flags;
|
|
),
|
|
|
|
TP_printk("call_site=%pS ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s",
|
|
(void *)__entry->call_site,
|
|
__entry->ptr,
|
|
__entry->bytes_req,
|
|
__entry->bytes_alloc,
|
|
show_gfp_flags(__entry->gfp_flags))
|
|
);
|
|
|
|
DEFINE_EVENT(kmem_alloc, kmalloc,
|
|
|
|
TP_PROTO(unsigned long call_site, const void *ptr,
|
|
size_t bytes_req, size_t bytes_alloc, gfp_t gfp_flags),
|
|
|
|
TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags)
|
|
);
|
|
|
|
DEFINE_EVENT(kmem_alloc, kmem_cache_alloc,
|
|
|
|
TP_PROTO(unsigned long call_site, const void *ptr,
|
|
size_t bytes_req, size_t bytes_alloc, gfp_t gfp_flags),
|
|
|
|
TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags)
|
|
);
|
|
|
|
DECLARE_EVENT_CLASS(kmem_alloc_node,
|
|
|
|
TP_PROTO(unsigned long call_site,
|
|
const void *ptr,
|
|
size_t bytes_req,
|
|
size_t bytes_alloc,
|
|
gfp_t gfp_flags,
|
|
int node),
|
|
|
|
TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( unsigned long, call_site )
|
|
__field( const void *, ptr )
|
|
__field( size_t, bytes_req )
|
|
__field( size_t, bytes_alloc )
|
|
__field( gfp_t, gfp_flags )
|
|
__field( int, node )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->call_site = call_site;
|
|
__entry->ptr = ptr;
|
|
__entry->bytes_req = bytes_req;
|
|
__entry->bytes_alloc = bytes_alloc;
|
|
__entry->gfp_flags = gfp_flags;
|
|
__entry->node = node;
|
|
),
|
|
|
|
TP_printk("call_site=%pS ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s node=%d",
|
|
(void *)__entry->call_site,
|
|
__entry->ptr,
|
|
__entry->bytes_req,
|
|
__entry->bytes_alloc,
|
|
show_gfp_flags(__entry->gfp_flags),
|
|
__entry->node)
|
|
);
|
|
|
|
DEFINE_EVENT(kmem_alloc_node, kmalloc_node,
|
|
|
|
TP_PROTO(unsigned long call_site, const void *ptr,
|
|
size_t bytes_req, size_t bytes_alloc,
|
|
gfp_t gfp_flags, int node),
|
|
|
|
TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node)
|
|
);
|
|
|
|
DEFINE_EVENT(kmem_alloc_node, kmem_cache_alloc_node,
|
|
|
|
TP_PROTO(unsigned long call_site, const void *ptr,
|
|
size_t bytes_req, size_t bytes_alloc,
|
|
gfp_t gfp_flags, int node),
|
|
|
|
TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node)
|
|
);
|
|
|
|
TRACE_EVENT(kfree,
|
|
|
|
TP_PROTO(unsigned long call_site, const void *ptr),
|
|
|
|
TP_ARGS(call_site, ptr),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( unsigned long, call_site )
|
|
__field( const void *, ptr )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->call_site = call_site;
|
|
__entry->ptr = ptr;
|
|
),
|
|
|
|
TP_printk("call_site=%pS ptr=%p",
|
|
(void *)__entry->call_site, __entry->ptr)
|
|
);
|
|
|
|
TRACE_EVENT(kmem_cache_free,
|
|
|
|
TP_PROTO(unsigned long call_site, const void *ptr, const char *name),
|
|
|
|
TP_ARGS(call_site, ptr, name),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( unsigned long, call_site )
|
|
__field( const void *, ptr )
|
|
__string( name, name )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->call_site = call_site;
|
|
__entry->ptr = ptr;
|
|
__assign_str(name, name);
|
|
),
|
|
|
|
TP_printk("call_site=%pS ptr=%p name=%s",
|
|
(void *)__entry->call_site, __entry->ptr, __get_str(name))
|
|
);
|
|
|
|
TRACE_EVENT(mm_page_free,
|
|
|
|
TP_PROTO(struct page *page, unsigned int order),
|
|
|
|
TP_ARGS(page, order),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( unsigned long, pfn )
|
|
__field( unsigned int, order )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pfn = page_to_pfn(page);
|
|
__entry->order = order;
|
|
),
|
|
|
|
TP_printk("page=%p pfn=%lu order=%d",
|
|
pfn_to_page(__entry->pfn),
|
|
__entry->pfn,
|
|
__entry->order)
|
|
);
|
|
|
|
TRACE_EVENT(mm_page_free_batched,
|
|
|
|
TP_PROTO(struct page *page),
|
|
|
|
TP_ARGS(page),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( unsigned long, pfn )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pfn = page_to_pfn(page);
|
|
),
|
|
|
|
TP_printk("page=%p pfn=%lu order=0",
|
|
pfn_to_page(__entry->pfn),
|
|
__entry->pfn)
|
|
);
|
|
|
|
TRACE_EVENT(mm_page_alloc,
|
|
|
|
TP_PROTO(struct page *page, unsigned int order,
|
|
gfp_t gfp_flags, int migratetype),
|
|
|
|
TP_ARGS(page, order, gfp_flags, migratetype),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( unsigned long, pfn )
|
|
__field( unsigned int, order )
|
|
__field( gfp_t, gfp_flags )
|
|
__field( int, migratetype )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pfn = page ? page_to_pfn(page) : -1UL;
|
|
__entry->order = order;
|
|
__entry->gfp_flags = gfp_flags;
|
|
__entry->migratetype = migratetype;
|
|
),
|
|
|
|
TP_printk("page=%p pfn=%lu order=%d migratetype=%d gfp_flags=%s",
|
|
__entry->pfn != -1UL ? pfn_to_page(__entry->pfn) : NULL,
|
|
__entry->pfn != -1UL ? __entry->pfn : 0,
|
|
__entry->order,
|
|
__entry->migratetype,
|
|
show_gfp_flags(__entry->gfp_flags))
|
|
);
|
|
|
|
DECLARE_EVENT_CLASS(mm_page,
|
|
|
|
TP_PROTO(struct page *page, unsigned int order, int migratetype),
|
|
|
|
TP_ARGS(page, order, migratetype),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( unsigned long, pfn )
|
|
__field( unsigned int, order )
|
|
__field( int, migratetype )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pfn = page ? page_to_pfn(page) : -1UL;
|
|
__entry->order = order;
|
|
__entry->migratetype = migratetype;
|
|
),
|
|
|
|
TP_printk("page=%p pfn=%lu order=%u migratetype=%d percpu_refill=%d",
|
|
__entry->pfn != -1UL ? pfn_to_page(__entry->pfn) : NULL,
|
|
__entry->pfn != -1UL ? __entry->pfn : 0,
|
|
__entry->order,
|
|
__entry->migratetype,
|
|
__entry->order == 0)
|
|
);
|
|
|
|
DEFINE_EVENT(mm_page, mm_page_alloc_zone_locked,
|
|
|
|
TP_PROTO(struct page *page, unsigned int order, int migratetype),
|
|
|
|
TP_ARGS(page, order, migratetype)
|
|
);
|
|
|
|
TRACE_EVENT(mm_page_pcpu_drain,
|
|
|
|
TP_PROTO(struct page *page, unsigned int order, int migratetype),
|
|
|
|
TP_ARGS(page, order, migratetype),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( unsigned long, pfn )
|
|
__field( unsigned int, order )
|
|
__field( int, migratetype )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pfn = page ? page_to_pfn(page) : -1UL;
|
|
__entry->order = order;
|
|
__entry->migratetype = migratetype;
|
|
),
|
|
|
|
TP_printk("page=%p pfn=%lu order=%d migratetype=%d",
|
|
pfn_to_page(__entry->pfn), __entry->pfn,
|
|
__entry->order, __entry->migratetype)
|
|
);
|
|
|
|
TRACE_EVENT(mm_page_alloc_extfrag,
|
|
|
|
TP_PROTO(struct page *page,
|
|
int alloc_order, int fallback_order,
|
|
int alloc_migratetype, int fallback_migratetype),
|
|
|
|
TP_ARGS(page,
|
|
alloc_order, fallback_order,
|
|
alloc_migratetype, fallback_migratetype),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( unsigned long, pfn )
|
|
__field( int, alloc_order )
|
|
__field( int, fallback_order )
|
|
__field( int, alloc_migratetype )
|
|
__field( int, fallback_migratetype )
|
|
__field( int, change_ownership )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pfn = page_to_pfn(page);
|
|
__entry->alloc_order = alloc_order;
|
|
__entry->fallback_order = fallback_order;
|
|
__entry->alloc_migratetype = alloc_migratetype;
|
|
__entry->fallback_migratetype = fallback_migratetype;
|
|
__entry->change_ownership = (alloc_migratetype ==
|
|
get_pageblock_migratetype(page));
|
|
),
|
|
|
|
TP_printk("page=%p pfn=%lu alloc_order=%d fallback_order=%d pageblock_order=%d alloc_migratetype=%d fallback_migratetype=%d fragmenting=%d change_ownership=%d",
|
|
pfn_to_page(__entry->pfn),
|
|
__entry->pfn,
|
|
__entry->alloc_order,
|
|
__entry->fallback_order,
|
|
pageblock_order,
|
|
__entry->alloc_migratetype,
|
|
__entry->fallback_migratetype,
|
|
__entry->fallback_order < pageblock_order,
|
|
__entry->change_ownership)
|
|
);
|
|
|
|
/*
|
|
* Required for uniquely and securely identifying mm in rss_stat tracepoint.
|
|
*/
|
|
#ifndef __PTR_TO_HASHVAL
|
|
static unsigned int __maybe_unused mm_ptr_to_hash(const void *ptr)
|
|
{
|
|
int ret;
|
|
unsigned long hashval;
|
|
|
|
ret = ptr_to_hashval(ptr, &hashval);
|
|
if (ret)
|
|
return 0;
|
|
|
|
/* The hashed value is only 32-bit */
|
|
return (unsigned int)hashval;
|
|
}
|
|
#define __PTR_TO_HASHVAL
|
|
#endif
|
|
|
|
TRACE_EVENT(rss_stat,
|
|
|
|
TP_PROTO(struct mm_struct *mm,
|
|
int member,
|
|
long count),
|
|
|
|
TP_ARGS(mm, member, count),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(unsigned int, mm_id)
|
|
__field(unsigned int, curr)
|
|
__field(int, member)
|
|
__field(long, size)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->mm_id = mm_ptr_to_hash(mm);
|
|
__entry->curr = !!(current->mm == mm);
|
|
__entry->member = member;
|
|
__entry->size = (count << PAGE_SHIFT);
|
|
),
|
|
|
|
TP_printk("mm_id=%u curr=%d member=%d size=%ldB",
|
|
__entry->mm_id,
|
|
__entry->curr,
|
|
__entry->member,
|
|
__entry->size)
|
|
);
|
|
#endif /* _TRACE_KMEM_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|