![Stephane Eranian](/assets/img/avatar_default.png)
This patch adds support for the new PERF_RECORD_MMAP2 record type
exposed by the kernel. This is an extended PERF_RECORD_MMAP record.
It adds for each file-backed mapping the device major, minor number and
the inode number and generation.
This triplet uniquely identifies the source of a file-backed mapping. It
can be used to detect identical virtual mappings between processes, for
instance.
The patch will prefer MMAP2 over MMAP.
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1377079825-19057-3-git-send-email-eranian@google.com
[ Cope with 314add6
"Change machine__findnew_thread() to set thread pid",
fix 'perf test' regression test entry affected,
use perf_missing_features.mmap2 to fallback to not using .mmap2 in older kernels,
so that new tools can work with kernels where this feature is not present ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
187 lines
5 KiB
C
187 lines
5 KiB
C
#ifndef __PERF_MAP_H
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#define __PERF_MAP_H
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#include <linux/compiler.h>
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#include <linux/list.h>
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#include <linux/rbtree.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include "types.h"
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enum map_type {
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MAP__FUNCTION = 0,
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MAP__VARIABLE,
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};
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#define MAP__NR_TYPES (MAP__VARIABLE + 1)
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extern const char *map_type__name[MAP__NR_TYPES];
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struct dso;
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struct ip_callchain;
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struct ref_reloc_sym;
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struct map_groups;
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struct machine;
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struct perf_evsel;
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struct map {
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union {
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struct rb_node rb_node;
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struct list_head node;
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};
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u64 start;
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u64 end;
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u8 /* enum map_type */ type;
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bool referenced;
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bool erange_warned;
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u32 priv;
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u64 pgoff;
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u32 maj, min; /* only valid for MMAP2 record */
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u64 ino; /* only valid for MMAP2 record */
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u64 ino_generation;/* only valid for MMAP2 record */
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/* ip -> dso rip */
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u64 (*map_ip)(struct map *, u64);
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/* dso rip -> ip */
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u64 (*unmap_ip)(struct map *, u64);
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struct dso *dso;
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struct map_groups *groups;
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};
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struct kmap {
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struct ref_reloc_sym *ref_reloc_sym;
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struct map_groups *kmaps;
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};
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struct map_groups {
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struct rb_root maps[MAP__NR_TYPES];
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struct list_head removed_maps[MAP__NR_TYPES];
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struct machine *machine;
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};
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static inline struct kmap *map__kmap(struct map *map)
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{
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return (struct kmap *)(map + 1);
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}
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static inline u64 map__map_ip(struct map *map, u64 ip)
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{
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return ip - map->start + map->pgoff;
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}
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static inline u64 map__unmap_ip(struct map *map, u64 ip)
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{
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return ip + map->start - map->pgoff;
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}
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static inline u64 identity__map_ip(struct map *map __maybe_unused, u64 ip)
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{
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return ip;
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}
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/* rip/ip <-> addr suitable for passing to `objdump --start-address=` */
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u64 map__rip_2objdump(struct map *map, u64 rip);
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struct symbol;
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typedef int (*symbol_filter_t)(struct map *map, struct symbol *sym);
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void map__init(struct map *map, enum map_type type,
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u64 start, u64 end, u64 pgoff, struct dso *dso);
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struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
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u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,
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u64 ino_gen,
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char *filename, enum map_type type);
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struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
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void map__delete(struct map *map);
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struct map *map__clone(struct map *map);
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int map__overlap(struct map *l, struct map *r);
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size_t map__fprintf(struct map *map, FILE *fp);
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size_t map__fprintf_dsoname(struct map *map, FILE *fp);
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int map__load(struct map *map, symbol_filter_t filter);
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struct symbol *map__find_symbol(struct map *map,
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u64 addr, symbol_filter_t filter);
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struct symbol *map__find_symbol_by_name(struct map *map, const char *name,
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symbol_filter_t filter);
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void map__fixup_start(struct map *map);
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void map__fixup_end(struct map *map);
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void map__reloc_vmlinux(struct map *map);
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size_t __map_groups__fprintf_maps(struct map_groups *mg,
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enum map_type type, int verbose, FILE *fp);
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void maps__insert(struct rb_root *maps, struct map *map);
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void maps__remove(struct rb_root *maps, struct map *map);
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struct map *maps__find(struct rb_root *maps, u64 addr);
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struct map *maps__first(struct rb_root *maps);
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struct map *maps__next(struct map *map);
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void map_groups__init(struct map_groups *mg);
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void map_groups__exit(struct map_groups *mg);
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int map_groups__clone(struct map_groups *mg,
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struct map_groups *parent, enum map_type type);
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size_t map_groups__fprintf(struct map_groups *mg, int verbose, FILE *fp);
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size_t map_groups__fprintf_maps(struct map_groups *mg, int verbose, FILE *fp);
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int maps__set_kallsyms_ref_reloc_sym(struct map **maps, const char *symbol_name,
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u64 addr);
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static inline void map_groups__insert(struct map_groups *mg, struct map *map)
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{
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maps__insert(&mg->maps[map->type], map);
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map->groups = mg;
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}
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static inline void map_groups__remove(struct map_groups *mg, struct map *map)
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{
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maps__remove(&mg->maps[map->type], map);
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}
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static inline struct map *map_groups__find(struct map_groups *mg,
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enum map_type type, u64 addr)
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{
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return maps__find(&mg->maps[type], addr);
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}
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static inline struct map *map_groups__first(struct map_groups *mg,
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enum map_type type)
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{
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return maps__first(&mg->maps[type]);
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}
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static inline struct map *map_groups__next(struct map *map)
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{
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return maps__next(map);
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}
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struct symbol *map_groups__find_symbol(struct map_groups *mg,
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enum map_type type, u64 addr,
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struct map **mapp,
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symbol_filter_t filter);
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struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
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enum map_type type,
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const char *name,
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struct map **mapp,
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symbol_filter_t filter);
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static inline
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struct symbol *map_groups__find_function_by_name(struct map_groups *mg,
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const char *name, struct map **mapp,
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symbol_filter_t filter)
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{
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return map_groups__find_symbol_by_name(mg, MAP__FUNCTION, name, mapp, filter);
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}
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int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
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int verbose, FILE *fp);
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struct map *map_groups__find_by_name(struct map_groups *mg,
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enum map_type type, const char *name);
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void map_groups__flush(struct map_groups *mg);
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#endif /* __PERF_MAP_H */
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