f57b05ed53
If we bring the recorded perf data together with kernel binary from another
machine using:
on server A:
perf archive
on server B:
tar xjvf perf.data.tar.bz2 -C ~/.debug
the build_id kernel dso is not properly recognized during the "perf report"
command on server B.
The reason is, that build_id dsos are added during the session initialization,
while the kernel maps are created during the sample event processing.
The machine__create_kernel_maps functions ends up creating new dso object for
kernel, but it does not check if we already have one added by build_id
processing.
Also the build_id reading ABI quirk added in commit:
- commit b25114817a
perf build-id: Add quirk to deal with perf.data file format breakage
populates the "struct build_id_event::pid" with 0, which
is later interpreted as DEFAULT_GUEST_KERNEL_ID.
This is not always correct, so it's better to guess the pid
value based on the "struct build_id_event::header::misc" value.
- Tested with data generated on x86 kernel version v2.6.34
and reported back on x86_64 current kernel.
- Not tested for guest kernel case.
Note the problem stays for PERF_RECORD_MMAP events recorded by perf that
does not use proper pid (HOST_KERNEL_ID/DEFAULT_GUEST_KERNEL_ID). They are
misinterpreted within the current perf code. Probably there's not much we
can do about that.
Cc: Avi Kivity <avi@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Yanmin Zhang <yanmin_zhang@linux.intel.com>
Link: http://lkml.kernel.org/r/20110601194346.GB1934@jolsa.brq.redhat.com
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
244 lines
6.4 KiB
C
244 lines
6.4 KiB
C
#ifndef __PERF_SYMBOL
|
|
#define __PERF_SYMBOL 1
|
|
|
|
#include <linux/types.h>
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include "map.h"
|
|
#include <linux/list.h>
|
|
#include <linux/rbtree.h>
|
|
#include <stdio.h>
|
|
|
|
#ifdef HAVE_CPLUS_DEMANGLE
|
|
extern char *cplus_demangle(const char *, int);
|
|
|
|
static inline char *bfd_demangle(void __used *v, const char *c, int i)
|
|
{
|
|
return cplus_demangle(c, i);
|
|
}
|
|
#else
|
|
#ifdef NO_DEMANGLE
|
|
static inline char *bfd_demangle(void __used *v, const char __used *c,
|
|
int __used i)
|
|
{
|
|
return NULL;
|
|
}
|
|
#else
|
|
#include <bfd.h>
|
|
#endif
|
|
#endif
|
|
|
|
int hex2u64(const char *ptr, u64 *val);
|
|
char *strxfrchar(char *s, char from, char to);
|
|
|
|
/*
|
|
* libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
|
|
* for newer versions we can use mmap to reduce memory usage:
|
|
*/
|
|
#ifdef LIBELF_NO_MMAP
|
|
# define PERF_ELF_C_READ_MMAP ELF_C_READ
|
|
#else
|
|
# define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
|
|
#endif
|
|
|
|
#ifndef DMGL_PARAMS
|
|
#define DMGL_PARAMS (1 << 0) /* Include function args */
|
|
#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
|
|
#endif
|
|
|
|
#define BUILD_ID_SIZE 20
|
|
|
|
/** struct symbol - symtab entry
|
|
*
|
|
* @ignore - resolvable but tools ignore it (e.g. idle routines)
|
|
*/
|
|
struct symbol {
|
|
struct rb_node rb_node;
|
|
u64 start;
|
|
u64 end;
|
|
u16 namelen;
|
|
u8 binding;
|
|
bool ignore;
|
|
char name[0];
|
|
};
|
|
|
|
void symbol__delete(struct symbol *sym);
|
|
|
|
struct strlist;
|
|
|
|
struct symbol_conf {
|
|
unsigned short priv_size;
|
|
bool try_vmlinux_path,
|
|
use_modules,
|
|
sort_by_name,
|
|
show_nr_samples,
|
|
use_callchain,
|
|
exclude_other,
|
|
show_cpu_utilization,
|
|
initialized,
|
|
kptr_restrict;
|
|
const char *vmlinux_name,
|
|
*kallsyms_name,
|
|
*source_prefix,
|
|
*field_sep;
|
|
const char *default_guest_vmlinux_name,
|
|
*default_guest_kallsyms,
|
|
*default_guest_modules;
|
|
const char *guestmount;
|
|
const char *dso_list_str,
|
|
*comm_list_str,
|
|
*sym_list_str,
|
|
*col_width_list_str;
|
|
struct strlist *dso_list,
|
|
*comm_list,
|
|
*sym_list;
|
|
const char *symfs;
|
|
};
|
|
|
|
extern struct symbol_conf symbol_conf;
|
|
|
|
static inline void *symbol__priv(struct symbol *sym)
|
|
{
|
|
return ((void *)sym) - symbol_conf.priv_size;
|
|
}
|
|
|
|
struct ref_reloc_sym {
|
|
const char *name;
|
|
u64 addr;
|
|
u64 unrelocated_addr;
|
|
};
|
|
|
|
struct map_symbol {
|
|
struct map *map;
|
|
struct symbol *sym;
|
|
bool unfolded;
|
|
bool has_children;
|
|
};
|
|
|
|
struct addr_location {
|
|
struct thread *thread;
|
|
struct map *map;
|
|
struct symbol *sym;
|
|
u64 addr;
|
|
char level;
|
|
bool filtered;
|
|
u8 cpumode;
|
|
s32 cpu;
|
|
};
|
|
|
|
enum dso_kernel_type {
|
|
DSO_TYPE_USER = 0,
|
|
DSO_TYPE_KERNEL,
|
|
DSO_TYPE_GUEST_KERNEL
|
|
};
|
|
|
|
struct dso {
|
|
struct list_head node;
|
|
struct rb_root symbols[MAP__NR_TYPES];
|
|
struct rb_root symbol_names[MAP__NR_TYPES];
|
|
enum dso_kernel_type kernel;
|
|
u8 adjust_symbols:1;
|
|
u8 has_build_id:1;
|
|
u8 hit:1;
|
|
u8 annotate_warned:1;
|
|
u8 sname_alloc:1;
|
|
u8 lname_alloc:1;
|
|
unsigned char symtab_type;
|
|
u8 sorted_by_name;
|
|
u8 loaded;
|
|
u8 build_id[BUILD_ID_SIZE];
|
|
const char *short_name;
|
|
char *long_name;
|
|
u16 long_name_len;
|
|
u16 short_name_len;
|
|
char name[0];
|
|
};
|
|
|
|
struct dso *dso__new(const char *name);
|
|
void dso__delete(struct dso *dso);
|
|
|
|
int dso__name_len(const struct dso *dso);
|
|
|
|
bool dso__loaded(const struct dso *dso, enum map_type type);
|
|
bool dso__sorted_by_name(const struct dso *dso, enum map_type type);
|
|
|
|
static inline void dso__set_loaded(struct dso *dso, enum map_type type)
|
|
{
|
|
dso->loaded |= (1 << type);
|
|
}
|
|
|
|
void dso__sort_by_name(struct dso *dso, enum map_type type);
|
|
|
|
struct dso *__dsos__findnew(struct list_head *head, const char *name);
|
|
|
|
int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter);
|
|
int dso__load_vmlinux(struct dso *dso, struct map *map,
|
|
const char *vmlinux, symbol_filter_t filter);
|
|
int dso__load_vmlinux_path(struct dso *dso, struct map *map,
|
|
symbol_filter_t filter);
|
|
int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
|
|
symbol_filter_t filter);
|
|
int machine__load_kallsyms(struct machine *machine, const char *filename,
|
|
enum map_type type, symbol_filter_t filter);
|
|
int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
|
|
symbol_filter_t filter);
|
|
|
|
size_t __dsos__fprintf(struct list_head *head, FILE *fp);
|
|
|
|
size_t machine__fprintf_dsos_buildid(struct machine *machine,
|
|
FILE *fp, bool with_hits);
|
|
size_t machines__fprintf_dsos(struct rb_root *machines, FILE *fp);
|
|
size_t machines__fprintf_dsos_buildid(struct rb_root *machines,
|
|
FILE *fp, bool with_hits);
|
|
size_t dso__fprintf_buildid(struct dso *dso, FILE *fp);
|
|
size_t dso__fprintf_symbols_by_name(struct dso *dso,
|
|
enum map_type type, FILE *fp);
|
|
size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp);
|
|
|
|
enum symtab_type {
|
|
SYMTAB__KALLSYMS = 0,
|
|
SYMTAB__GUEST_KALLSYMS,
|
|
SYMTAB__JAVA_JIT,
|
|
SYMTAB__BUILD_ID_CACHE,
|
|
SYMTAB__FEDORA_DEBUGINFO,
|
|
SYMTAB__UBUNTU_DEBUGINFO,
|
|
SYMTAB__BUILDID_DEBUGINFO,
|
|
SYMTAB__SYSTEM_PATH_DSO,
|
|
SYMTAB__GUEST_KMODULE,
|
|
SYMTAB__SYSTEM_PATH_KMODULE,
|
|
SYMTAB__NOT_FOUND,
|
|
};
|
|
|
|
char dso__symtab_origin(const struct dso *dso);
|
|
void dso__set_long_name(struct dso *dso, char *name);
|
|
void dso__set_build_id(struct dso *dso, void *build_id);
|
|
void dso__read_running_kernel_build_id(struct dso *dso,
|
|
struct machine *machine);
|
|
struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
|
|
u64 addr);
|
|
struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
|
|
const char *name);
|
|
|
|
int filename__read_build_id(const char *filename, void *bf, size_t size);
|
|
int sysfs__read_build_id(const char *filename, void *bf, size_t size);
|
|
bool __dsos__read_build_ids(struct list_head *head, bool with_hits);
|
|
int build_id__sprintf(const u8 *build_id, int len, char *bf);
|
|
int kallsyms__parse(const char *filename, void *arg,
|
|
int (*process_symbol)(void *arg, const char *name,
|
|
char type, u64 start, u64 end));
|
|
|
|
void machine__destroy_kernel_maps(struct machine *machine);
|
|
int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel);
|
|
int machine__create_kernel_maps(struct machine *machine);
|
|
|
|
int machines__create_kernel_maps(struct rb_root *machines, pid_t pid);
|
|
int machines__create_guest_kernel_maps(struct rb_root *machines);
|
|
void machines__destroy_guest_kernel_maps(struct rb_root *machines);
|
|
|
|
int symbol__init(void);
|
|
void symbol__exit(void);
|
|
bool symbol_type__is_a(char symbol_type, enum map_type map_type);
|
|
|
|
size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp);
|
|
|
|
#endif /* __PERF_SYMBOL */
|