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https://github.com/torvalds/linux
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9c51f8788b
Add variants of perf_env__insert_bpf_prog_info(), perf_env__insert_btf()
and perf_env__find_btf prefixed with __ to indicate the
env->bpf_progs.lock is assumed held.
Call these variants when the lock is held to avoid recursively taking it
and potentially having a thread deadlock with itself.
Fixes: f8dfeae009 ("perf bpf: Show more BPF program info in print_bpf_prog_info()")
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <song@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Link: https://lore.kernel.org/r/20231207014655.1252484-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_BPF_EVENT_H
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#define __PERF_BPF_EVENT_H
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#include <linux/compiler.h>
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#include <linux/rbtree.h>
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#include <api/fd/array.h>
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#include <stdio.h>
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struct bpf_prog_info;
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struct machine;
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union perf_event;
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struct perf_env;
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struct perf_sample;
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struct perf_session;
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struct record_opts;
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struct evlist;
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struct target;
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struct bpf_prog_info_node {
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struct perf_bpil *info_linear;
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struct rb_node rb_node;
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};
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struct btf_node {
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struct rb_node rb_node;
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u32 id;
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u32 data_size;
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char data[];
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};
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#ifdef HAVE_LIBBPF_SUPPORT
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int machine__process_bpf(struct machine *machine, union perf_event *event,
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struct perf_sample *sample);
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int evlist__add_bpf_sb_event(struct evlist *evlist, struct perf_env *env);
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void __bpf_event__print_bpf_prog_info(struct bpf_prog_info *info,
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struct perf_env *env,
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FILE *fp);
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#else
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static inline int machine__process_bpf(struct machine *machine __maybe_unused,
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union perf_event *event __maybe_unused,
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struct perf_sample *sample __maybe_unused)
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{
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return 0;
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}
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static inline int evlist__add_bpf_sb_event(struct evlist *evlist __maybe_unused,
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struct perf_env *env __maybe_unused)
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{
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return 0;
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}
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static inline void __bpf_event__print_bpf_prog_info(struct bpf_prog_info *info __maybe_unused,
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struct perf_env *env __maybe_unused,
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FILE *fp __maybe_unused)
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{
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}
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#endif // HAVE_LIBBPF_SUPPORT
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#endif
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