mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 06:06:41 +07:00
a65cb4b9f8
The perf_evlist__mmap_read used 'union perf_event' as a placeholder for event crossing the mmap boundary. This is ok for sample shorter than ~PATH_MAX. However we could grow up to the maximum sample size which is 16 bits max. I hit this overflow issue when using 'perf top -G dwarf' which produces sample with the size around 8192 bytes. We could configure any valid sample size here using: '-G dwarf,size'. Using array with sample max size instead for the event placeholder. Also adding another safe check for the dynamic size of the user stack. TODO: The 'struct perf_mmap' is quite big now, maybe we could use some lazy allocation for event_copy size. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Acked-by: David Ahern <dsahern@gmail.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1380721599-24285-1-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
192 lines
5.6 KiB
C
192 lines
5.6 KiB
C
#ifndef __PERF_EVLIST_H
|
|
#define __PERF_EVLIST_H 1
|
|
|
|
#include <linux/list.h>
|
|
#include <stdio.h>
|
|
#include "../perf.h"
|
|
#include "event.h"
|
|
#include "evsel.h"
|
|
#include "util.h"
|
|
#include <unistd.h>
|
|
|
|
struct pollfd;
|
|
struct thread_map;
|
|
struct cpu_map;
|
|
struct perf_record_opts;
|
|
|
|
#define PERF_EVLIST__HLIST_BITS 8
|
|
#define PERF_EVLIST__HLIST_SIZE (1 << PERF_EVLIST__HLIST_BITS)
|
|
|
|
struct perf_mmap {
|
|
void *base;
|
|
int mask;
|
|
unsigned int prev;
|
|
char event_copy[PERF_SAMPLE_MAX_SIZE];
|
|
};
|
|
|
|
struct perf_evlist {
|
|
struct list_head entries;
|
|
struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
|
|
int nr_entries;
|
|
int nr_groups;
|
|
int nr_fds;
|
|
int nr_mmaps;
|
|
size_t mmap_len;
|
|
int id_pos;
|
|
int is_pos;
|
|
u64 combined_sample_type;
|
|
struct {
|
|
int cork_fd;
|
|
pid_t pid;
|
|
} workload;
|
|
bool overwrite;
|
|
struct perf_mmap *mmap;
|
|
struct pollfd *pollfd;
|
|
struct thread_map *threads;
|
|
struct cpu_map *cpus;
|
|
struct perf_evsel *selected;
|
|
};
|
|
|
|
struct perf_evsel_str_handler {
|
|
const char *name;
|
|
void *handler;
|
|
};
|
|
|
|
struct perf_evlist *perf_evlist__new(void);
|
|
struct perf_evlist *perf_evlist__new_default(void);
|
|
void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
|
|
struct thread_map *threads);
|
|
void perf_evlist__exit(struct perf_evlist *evlist);
|
|
void perf_evlist__delete(struct perf_evlist *evlist);
|
|
|
|
void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry);
|
|
int perf_evlist__add_default(struct perf_evlist *evlist);
|
|
int __perf_evlist__add_default_attrs(struct perf_evlist *evlist,
|
|
struct perf_event_attr *attrs, size_t nr_attrs);
|
|
|
|
#define perf_evlist__add_default_attrs(evlist, array) \
|
|
__perf_evlist__add_default_attrs(evlist, array, ARRAY_SIZE(array))
|
|
|
|
int perf_evlist__add_newtp(struct perf_evlist *evlist,
|
|
const char *sys, const char *name, void *handler);
|
|
|
|
int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter);
|
|
|
|
struct perf_evsel *
|
|
perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id);
|
|
|
|
struct perf_evsel *
|
|
perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist,
|
|
const char *name);
|
|
|
|
void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel,
|
|
int cpu, int thread, u64 id);
|
|
|
|
void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd);
|
|
|
|
struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);
|
|
|
|
struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id);
|
|
|
|
union perf_event *perf_evlist__mmap_read(struct perf_evlist *self, int idx);
|
|
|
|
int perf_evlist__open(struct perf_evlist *evlist);
|
|
void perf_evlist__close(struct perf_evlist *evlist);
|
|
|
|
void perf_evlist__set_id_pos(struct perf_evlist *evlist);
|
|
bool perf_can_sample_identifier(void);
|
|
void perf_evlist__config(struct perf_evlist *evlist,
|
|
struct perf_record_opts *opts);
|
|
|
|
int perf_evlist__prepare_workload(struct perf_evlist *evlist,
|
|
struct perf_target *target,
|
|
const char *argv[], bool pipe_output,
|
|
bool want_signal);
|
|
int perf_evlist__start_workload(struct perf_evlist *evlist);
|
|
|
|
int perf_evlist__parse_mmap_pages(const struct option *opt,
|
|
const char *str,
|
|
int unset);
|
|
|
|
int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
|
|
bool overwrite);
|
|
void perf_evlist__munmap(struct perf_evlist *evlist);
|
|
|
|
void perf_evlist__disable(struct perf_evlist *evlist);
|
|
void perf_evlist__enable(struct perf_evlist *evlist);
|
|
|
|
int perf_evlist__disable_event(struct perf_evlist *evlist,
|
|
struct perf_evsel *evsel);
|
|
int perf_evlist__enable_event(struct perf_evlist *evlist,
|
|
struct perf_evsel *evsel);
|
|
|
|
void perf_evlist__set_selected(struct perf_evlist *evlist,
|
|
struct perf_evsel *evsel);
|
|
|
|
static inline void perf_evlist__set_maps(struct perf_evlist *evlist,
|
|
struct cpu_map *cpus,
|
|
struct thread_map *threads)
|
|
{
|
|
evlist->cpus = cpus;
|
|
evlist->threads = threads;
|
|
}
|
|
|
|
int perf_evlist__create_maps(struct perf_evlist *evlist,
|
|
struct perf_target *target);
|
|
void perf_evlist__delete_maps(struct perf_evlist *evlist);
|
|
int perf_evlist__apply_filters(struct perf_evlist *evlist);
|
|
|
|
void __perf_evlist__set_leader(struct list_head *list);
|
|
void perf_evlist__set_leader(struct perf_evlist *evlist);
|
|
|
|
u64 perf_evlist__read_format(struct perf_evlist *evlist);
|
|
u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist);
|
|
u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist);
|
|
bool perf_evlist__sample_id_all(struct perf_evlist *evlist);
|
|
u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist);
|
|
|
|
int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,
|
|
struct perf_sample *sample);
|
|
|
|
bool perf_evlist__valid_sample_type(struct perf_evlist *evlist);
|
|
bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist);
|
|
bool perf_evlist__valid_read_format(struct perf_evlist *evlist);
|
|
|
|
void perf_evlist__splice_list_tail(struct perf_evlist *evlist,
|
|
struct list_head *list,
|
|
int nr_entries);
|
|
|
|
static inline struct perf_evsel *perf_evlist__first(struct perf_evlist *evlist)
|
|
{
|
|
return list_entry(evlist->entries.next, struct perf_evsel, node);
|
|
}
|
|
|
|
static inline struct perf_evsel *perf_evlist__last(struct perf_evlist *evlist)
|
|
{
|
|
return list_entry(evlist->entries.prev, struct perf_evsel, node);
|
|
}
|
|
|
|
size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp);
|
|
|
|
static inline unsigned int perf_mmap__read_head(struct perf_mmap *mm)
|
|
{
|
|
struct perf_event_mmap_page *pc = mm->base;
|
|
int head = pc->data_head;
|
|
rmb();
|
|
return head;
|
|
}
|
|
|
|
static inline void perf_mmap__write_tail(struct perf_mmap *md,
|
|
unsigned long tail)
|
|
{
|
|
struct perf_event_mmap_page *pc = md->base;
|
|
|
|
/*
|
|
* ensure all reads are done before we write the tail out.
|
|
*/
|
|
/* mb(); */
|
|
pc->data_tail = tail;
|
|
}
|
|
|
|
#endif /* __PERF_EVLIST_H */
|