diff options
author | Jiri Olsa <jolsa@kernel.org> | 2022-02-24 18:52:37 +0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-03-05 22:11:09 +0300 |
commit | a3bfc0d76f63dbe406bb64e5ea14e217f97b2b24 (patch) | |
tree | f42108ba2f7ca6f1551696c805c78c6baf599893 /tools/perf/util | |
parent | d57159efde1fbc35ed128f6be37d06ad88f660a7 (diff) | |
download | linux-a3bfc0d76f63dbe406bb64e5ea14e217f97b2b24.tar.xz |
perf tools: Remove bpf_program__set_priv/bpf_program__priv usage
Both bpf_program__set_priv/bpf_program__priv are deprecated
and will be eventually removed.
Using hashmap to replace that functionality.
Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220224155238.714682-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
-rw-r--r-- | tools/perf/util/bpf-loader.c | 98 |
1 files changed, 82 insertions, 16 deletions
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c index efd9c703b5cc..b9d4278895ec 100644 --- a/tools/perf/util/bpf-loader.c +++ b/tools/perf/util/bpf-loader.c @@ -26,6 +26,7 @@ #include "util.h" #include "llvm-utils.h" #include "c++/clang-c.h" +#include "hashmap.h" #include <internal/xyarray.h> @@ -55,6 +56,7 @@ struct bpf_perf_object { }; static LIST_HEAD(bpf_objects_list); +static struct hashmap *bpf_program_hash; static struct bpf_perf_object * bpf_perf_object__next(struct bpf_perf_object *prev) @@ -173,6 +175,35 @@ struct bpf_object *bpf__prepare_load(const char *filename, bool source) return obj; } +static void +clear_prog_priv(const struct bpf_program *prog __maybe_unused, + void *_priv) +{ + struct bpf_prog_priv *priv = _priv; + + cleanup_perf_probe_events(&priv->pev, 1); + zfree(&priv->insns_buf); + zfree(&priv->type_mapping); + zfree(&priv->sys_name); + zfree(&priv->evt_name); + free(priv); +} + +static void bpf_program_hash_free(void) +{ + struct hashmap_entry *cur; + size_t bkt; + + if (IS_ERR_OR_NULL(bpf_program_hash)) + return; + + hashmap__for_each_entry(bpf_program_hash, cur, bkt) + clear_prog_priv(cur->key, cur->value); + + hashmap__free(bpf_program_hash); + bpf_program_hash = NULL; +} + void bpf__clear(void) { struct bpf_perf_object *perf_obj, *tmp; @@ -181,20 +212,55 @@ void bpf__clear(void) bpf__unprobe(perf_obj->obj); bpf_perf_object__close(perf_obj); } + + bpf_program_hash_free(); } -static void -clear_prog_priv(struct bpf_program *prog __maybe_unused, - void *_priv) +static size_t ptr_hash(const void *__key, void *ctx __maybe_unused) { - struct bpf_prog_priv *priv = _priv; + return (size_t) __key; +} - cleanup_perf_probe_events(&priv->pev, 1); - zfree(&priv->insns_buf); - zfree(&priv->type_mapping); - zfree(&priv->sys_name); - zfree(&priv->evt_name); - free(priv); +static bool ptr_equal(const void *key1, const void *key2, + void *ctx __maybe_unused) +{ + return key1 == key2; +} + +static void *program_priv(const struct bpf_program *prog) +{ + void *priv; + + if (IS_ERR_OR_NULL(bpf_program_hash)) + return NULL; + if (!hashmap__find(bpf_program_hash, prog, &priv)) + return NULL; + return priv; +} + +static int program_set_priv(struct bpf_program *prog, void *priv) +{ + void *old_priv; + + /* + * Should not happen, we warn about it in the + * caller function - config_bpf_program + */ + if (IS_ERR(bpf_program_hash)) + return PTR_ERR(bpf_program_hash); + + if (!bpf_program_hash) { + bpf_program_hash = hashmap__new(ptr_hash, ptr_equal, NULL); + if (IS_ERR(bpf_program_hash)) + return PTR_ERR(bpf_program_hash); + } + + old_priv = program_priv(prog); + if (old_priv) { + clear_prog_priv(prog, old_priv); + return hashmap__set(bpf_program_hash, prog, priv, NULL, NULL); + } + return hashmap__add(bpf_program_hash, prog, priv); } static int @@ -438,7 +504,7 @@ config_bpf_program(struct bpf_program *prog) pr_debug("bpf: config '%s' is ok\n", config_str); set_priv: - err = bpf_program__set_priv(prog, priv, clear_prog_priv); + err = program_set_priv(prog, priv); if (err) { pr_debug("Failed to set priv for program '%s'\n", config_str); goto errout; @@ -479,7 +545,7 @@ preproc_gen_prologue(struct bpf_program *prog, int n, struct bpf_insn *orig_insns, int orig_insns_cnt, struct bpf_prog_prep_result *res) { - struct bpf_prog_priv *priv = bpf_program__priv(prog); + struct bpf_prog_priv *priv = program_priv(prog); struct probe_trace_event *tev; struct perf_probe_event *pev; struct bpf_insn *buf; @@ -630,7 +696,7 @@ static int map_prologue(struct perf_probe_event *pev, int *mapping, static int hook_load_preprocessor(struct bpf_program *prog) { - struct bpf_prog_priv *priv = bpf_program__priv(prog); + struct bpf_prog_priv *priv = program_priv(prog); struct perf_probe_event *pev; bool need_prologue = false; int err, i; @@ -706,7 +772,7 @@ int bpf__probe(struct bpf_object *obj) if (err) goto out; - priv = bpf_program__priv(prog); + priv = program_priv(prog); if (IS_ERR_OR_NULL(priv)) { if (!priv) err = -BPF_LOADER_ERRNO__INTERNAL; @@ -758,7 +824,7 @@ int bpf__unprobe(struct bpf_object *obj) struct bpf_program *prog; bpf_object__for_each_program(prog, obj) { - struct bpf_prog_priv *priv = bpf_program__priv(prog); + struct bpf_prog_priv *priv = program_priv(prog); int i; if (IS_ERR_OR_NULL(priv) || priv->is_tp) @@ -814,7 +880,7 @@ int bpf__foreach_event(struct bpf_object *obj, int err; bpf_object__for_each_program(prog, obj) { - struct bpf_prog_priv *priv = bpf_program__priv(prog); + struct bpf_prog_priv *priv = program_priv(prog); struct probe_trace_event *tev; struct perf_probe_event *pev; int i, fd; |