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And take it into account when looking up DSOs when we have the dso_id
fields obtained from somewhere, like from PERF_RECORD_MMAP2 records.
Instances of struct map pointing to the same DSO pathname but with
anything in dso_id different are in fact different DSOs, so better have
different 'struct dso' instances to reflect that. At some point we may
want to get copies of the contents of the different objects if we want
to do correct annotation or other analysis.
With this we get 'struct map' 24 bytes leaner:
$ pahole -C map ~/bin/perf
struct map {
union {
struct rb_node rb_node __attribute__((__aligned__(8))); /* 0 24 */
struct list_head node; /* 0 16 */
} __attribute__((__aligned__(8))); /* 0 24 */
u64 start; /* 24 8 */
u64 end; /* 32 8 */
_Bool erange_warned:1; /* 40: 0 1 */
_Bool priv:1; /* 40: 1 1 */
/* XXX 6 bits hole, try to pack */
/* XXX 3 bytes hole, try to pack */
u32 prot; /* 44 4 */
u64 pgoff; /* 48 8 */
u64 reloc; /* 56 8 */
/* --- cacheline 1 boundary (64 bytes) --- */
u64 (*map_ip)(struct map *, u64); /* 64 8 */
u64 (*unmap_ip)(struct map *, u64); /* 72 8 */
struct dso * dso; /* 80 8 */
refcount_t refcnt; /* 88 4 */
u32 flags; /* 92 4 */
/* size: 96, cachelines: 2, members: 13 */
/* sum members: 92, holes: 1, sum holes: 3 */
/* sum bitfield members: 2 bits, bit holes: 1, sum bit holes: 6 bits */
/* forced alignments: 1 */
/* last cacheline: 32 bytes */
} __attribute__((__aligned__(8)));
$
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-g4hxxmraplo7wfjmk384mfsb@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_DSOS
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#define __PERF_DSOS
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#include <stdbool.h>
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#include <stdio.h>
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#include <linux/list.h>
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#include <linux/rbtree.h>
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#include "rwsem.h"
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struct dso;
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struct dso_id;
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/*
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* DSOs are put into both a list for fast iteration and rbtree for fast
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* long name lookup.
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*/
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struct dsos {
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struct list_head head;
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struct rb_root root; /* rbtree root sorted by long name */
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struct rw_semaphore lock;
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};
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void __dsos__add(struct dsos *dsos, struct dso *dso);
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void dsos__add(struct dsos *dsos, struct dso *dso);
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struct dso *__dsos__addnew(struct dsos *dsos, const char *name);
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struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short);
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struct dso *dsos__findnew_id(struct dsos *dsos, const char *name, struct dso_id *id);
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struct dso *__dsos__findnew_link_by_longname_id(struct rb_root *root, struct dso *dso,
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const char *name, struct dso_id *id);
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bool __dsos__read_build_ids(struct list_head *head, bool with_hits);
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size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
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bool (skip)(struct dso *dso, int parm), int parm);
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size_t __dsos__fprintf(struct list_head *head, FILE *fp);
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#endif /* __PERF_DSOS */
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