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![Song Liu](/assets/img/avatar_default.png)
As reported by Jiri Olsa in:
"[BUG] perf: intel_pt won't display kernel function"
https://lore.kernel.org/lkml/20190403143738.GB32001@krava
Recent changes to support PERF_RECORD_KSYMBOL and PERF_RECORD_BPF_EVENT
broke --kallsyms option. This is because it broke test __map__is_kmodule.
This patch fixes this by adding check for bpf program, so that these maps
are not mistaken as kernel modules.
Signed-off-by: Song Liu <songliubraving@fb.com>
Reported-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yonghong Song <yhs@fb.com>
Link: http://lkml.kernel.org/r/20190416160127.30203-8-jolsa@kernel.org
Fixes: 76193a9452
("perf, bpf: Introduce PERF_RECORD_KSYMBOL")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
179 lines
4.7 KiB
C
179 lines
4.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_MAP_H
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#define __PERF_MAP_H
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#include <linux/refcount.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 <string.h>
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#include <stdbool.h>
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#include <linux/types.h>
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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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struct rb_node rb_node_name;
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u64 start;
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u64 end;
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bool erange_warned;
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u32 priv;
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u32 prot;
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u32 flags;
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u64 pgoff;
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u64 reloc;
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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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refcount_t refcnt;
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};
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struct kmap;
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struct kmap *__map__kmap(struct map *map);
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struct kmap *map__kmap(struct map *map);
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struct map_groups *map__kmaps(struct map *map);
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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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static inline size_t map__size(const struct map *map)
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{
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return map->end - map->start;
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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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/* objdump address -> memory address */
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u64 map__objdump_2mem(struct map *map, u64 ip);
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struct symbol;
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struct thread;
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/* map__for_each_symbol - iterate over the symbols in the given map
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*
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* @map: the 'struct map *' in which symbols itereated
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* @pos: the 'struct symbol *' to use as a loop cursor
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* @n: the 'struct rb_node *' to use as a temporary storage
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* Note: caller must ensure map->dso is not NULL (map is loaded).
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*/
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#define map__for_each_symbol(map, pos, n) \
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dso__for_each_symbol(map->dso, pos, n)
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/* map__for_each_symbol_with_name - iterate over the symbols in the given map
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* that have the given name
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*
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* @map: the 'struct map *' in which symbols itereated
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* @sym_name: the symbol name
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* @pos: the 'struct symbol *' to use as a loop cursor
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*/
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#define __map__for_each_symbol_by_name(map, sym_name, pos) \
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for (pos = map__find_symbol_by_name(map, sym_name); \
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pos && \
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!symbol__match_symbol_name(pos->name, sym_name, \
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SYMBOL_TAG_INCLUDE__DEFAULT_ONLY); \
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pos = symbol__next_by_name(pos))
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#define map__for_each_symbol_by_name(map, sym_name, pos) \
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__map__for_each_symbol_by_name(map, sym_name, (pos))
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void map__init(struct map *map,
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u64 start, u64 end, u64 pgoff, struct dso *dso);
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struct map *map__new(struct machine *machine, u64 start, u64 len,
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u64 pgoff, u32 d_maj, u32 d_min, u64 ino,
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u64 ino_gen, u32 prot, u32 flags,
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char *filename, struct thread *thread);
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struct map *map__new2(u64 start, struct dso *dso);
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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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static inline struct map *map__get(struct map *map)
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{
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if (map)
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refcount_inc(&map->refcnt);
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return map;
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}
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void map__put(struct map *map);
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static inline void __map__zput(struct map **map)
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{
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map__put(*map);
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*map = NULL;
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}
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#define map__zput(map) __map__zput(&map)
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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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char *map__srcline(struct map *map, u64 addr, struct symbol *sym);
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int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
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FILE *fp);
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struct srccode_state;
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int map__fprintf_srccode(struct map *map, u64 addr,
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FILE *fp, struct srccode_state *state);
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int map__load(struct map *map);
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struct symbol *map__find_symbol(struct map *map, u64 addr);
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struct symbol *map__find_symbol_by_name(struct map *map, const char *name);
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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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int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name,
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u64 addr);
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bool __map__is_kernel(const struct map *map);
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bool __map__is_extra_kernel_map(const struct map *map);
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bool __map__is_bpf_prog(const struct map *map);
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static inline bool __map__is_kmodule(const struct map *map)
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{
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return !__map__is_kernel(map) && !__map__is_extra_kernel_map(map) &&
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!__map__is_bpf_prog(map);
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}
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bool map__has_symbols(const struct map *map);
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#define ENTRY_TRAMPOLINE_NAME "__entry_SYSCALL_64_trampoline"
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static inline bool is_entry_trampoline(const char *name)
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{
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return !strcmp(name, ENTRY_TRAMPOLINE_NAME);
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}
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#endif /* __PERF_MAP_H */
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