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perf env: Remove global perf_env 

The global perf_env was used for the host, but if a perf_env wasn't
easy to come by it was used in a lot of places where potentially
recorded and host data could be confused. Remove the global variable
as now the majority of accesses retrieve the perf_env for the host
from the session.

Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250724163302.596743-20-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Ian Rogers 2025-07-24 09:32:59 -07:00 committed by Namhyung Kim
parent 003a86bce0
commit 525a599bad
6 changed files with 4 additions and 10 deletions
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3
tools/perf/perf.c
View File

@ -346,12 +346,9 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
use_pager = 1;
commit_pager_choice();
perf_env__init(&perf_env);
perf_env__set_cmdline(&perf_env, argc, argv);
status = p->fn(argc, argv);
perf_config__exit();
exit_browser(status);
perf_env__exit(&perf_env);
if (status)
return status & 0xff;

2
tools/perf/util/bpf-event.c
View File

@ -549,7 +549,7 @@ static int perf_event__synthesize_one_bpf_prog(struct perf_session *session,
* for perf-record and perf-report use header.env;
* otherwise, use global perf_env.
*/
env = session->data ? perf_session__env(session) : &perf_env;
env = perf_session__env(session);
arrays = 1UL << PERF_BPIL_JITED_KSYMS;
arrays |= 1UL << PERF_BPIL_JITED_FUNC_LENS;

2
tools/perf/util/env.c
View File

@ -19,8 +19,6 @@
#include "strbuf.h"
#include "trace/beauty/beauty.h"
struct perf_env perf_env;
#ifdef HAVE_LIBBPF_SUPPORT
#include "bpf-event.h"
#include "bpf-utils.h"

2
tools/perf/util/env.h
View File

@ -150,8 +150,6 @@ enum perf_compress_type {
struct bpf_prog_info_node;
struct btf_node;
extern struct perf_env perf_env;
int perf_env__read_core_pmu_caps(struct perf_env *env);
void perf_env__exit(struct perf_env *env);

2
tools/perf/util/evsel.c
View File

@ -3882,7 +3882,7 @@ struct perf_env *evsel__env(struct evsel *evsel)
{
struct perf_session *session = evsel__session(evsel);
return session ? perf_session__env(session) : &perf_env;
return session ? perf_session__env(session) : NULL;
}
static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)

3
tools/perf/util/session.c
View File

@ -192,7 +192,8 @@ struct perf_session *__perf_session__new(struct perf_data *data,
symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
}
} else {
session->machines.host.env = host_env ?: &perf_env;
assert(host_env != NULL);
session->machines.host.env = host_env;
}
if (session->evlist)
session->evlist->session = session;