On Mon, Jun 23, 2025 at 03:57:21PM -0700, Namhyung Kim wrote:
> And make builtin-trace.c less conditional. Dummy functions will be
> called when BUILD_BPF_SKEL=0 is used. This makes the builtin-trace.c
> slightly smaller and simpler by removing the skeleton and its helpers.
>
> The conditional guard of trace__init_syscalls_bpf_prog_array_maps() is
> changed from the HAVE_BPF_SKEL to HAVE_LIBBPF_SUPPORT as it doesn't
> have a skeleton in the code directly. And a dummy function is added so
> that it can be called unconditionally. The function will succeed only
> if the both conditions are true.
>
> Do not include trace_augment.h from the BPF code and move the definition
> of TRACE_AUG_MAX_BUF to the BPF directly.
Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
- Arnaldo
> Reviewed-by: Howard Chu <howardchu95@xxxxxxxxx>
> Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
> ---
> v2)
> * rename to bpf_trace_augment.c
> * rebase to the current perf-tools-next
> * add Howard's Reviewed-by
>
> tools/perf/builtin-trace.c | 187 +++++-------------
> tools/perf/util/Build | 1 +
> .../bpf_skel/augmented_raw_syscalls.bpf.c | 3 +-
> tools/perf/util/bpf_trace_augment.c | 143 ++++++++++++++
> tools/perf/util/trace_augment.h | 62 +++++-
> 5 files changed, 255 insertions(+), 141 deletions(-)
> create mode 100644 tools/perf/util/bpf_trace_augment.c
>
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index bf9b5d0630d3ddac..56c0dd5acf73073e 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -20,9 +20,6 @@
> #include <bpf/bpf.h>
> #include <bpf/libbpf.h>
> #include <bpf/btf.h>
> -#ifdef HAVE_BPF_SKEL
> -#include "bpf_skel/augmented_raw_syscalls.skel.h"
> -#endif
> #endif
> #include "util/bpf_map.h"
> #include "util/rlimit.h"
> @@ -155,9 +152,6 @@ struct trace {
> *bpf_output;
> } events;
> } syscalls;
> -#ifdef HAVE_BPF_SKEL
> - struct augmented_raw_syscalls_bpf *skel;
> -#endif
> #ifdef HAVE_LIBBPF_SUPPORT
> struct btf *btf;
> #endif
> @@ -3701,7 +3695,10 @@ static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
> goto out;
> }
>
> -#ifdef HAVE_BPF_SKEL
> +#ifdef HAVE_LIBBPF_SUPPORT
> +
> +static struct bpf_program *unaugmented_prog;
> +
> static int syscall_arg_fmt__cache_btf_struct(struct syscall_arg_fmt *arg_fmt, struct btf *btf, char *type)
> {
> int id;
> @@ -3719,26 +3716,8 @@ static int syscall_arg_fmt__cache_btf_struct(struct syscall_arg_fmt *arg_fmt, st
> return 0;
> }
>
> -static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
> -{
> - struct bpf_program *pos, *prog = NULL;
> - const char *sec_name;
> -
> - if (trace->skel->obj == NULL)
> - return NULL;
> -
> - bpf_object__for_each_program(pos, trace->skel->obj) {
> - sec_name = bpf_program__section_name(pos);
> - if (sec_name && !strcmp(sec_name, name)) {
> - prog = pos;
> - break;
> - }
> - }
> -
> - return prog;
> -}
> -
> -static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
> +static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace __maybe_unused,
> + struct syscall *sc,
> const char *prog_name, const char *type)
> {
> struct bpf_program *prog;
> @@ -3746,19 +3725,19 @@ static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, str
> if (prog_name == NULL) {
> char default_prog_name[256];
> scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->name);
> - prog = trace__find_bpf_program_by_title(trace, default_prog_name);
> + prog = augmented_syscalls__find_by_title(default_prog_name);
> if (prog != NULL)
> goto out_found;
> if (sc->fmt && sc->fmt->alias) {
> scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->fmt->alias);
> - prog = trace__find_bpf_program_by_title(trace, default_prog_name);
> + prog = augmented_syscalls__find_by_title(default_prog_name);
> if (prog != NULL)
> goto out_found;
> }
> goto out_unaugmented;
> }
>
> - prog = trace__find_bpf_program_by_title(trace, prog_name);
> + prog = augmented_syscalls__find_by_title(prog_name);
>
> if (prog != NULL) {
> out_found:
> @@ -3768,7 +3747,7 @@ static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, str
> pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
> prog_name, type, sc->name);
> out_unaugmented:
> - return trace->skel->progs.syscall_unaugmented;
> + return unaugmented_prog;
> }
>
> static void trace__init_syscall_bpf_progs(struct trace *trace, int e_machine, int id)
> @@ -3785,13 +3764,13 @@ static void trace__init_syscall_bpf_progs(struct trace *trace, int e_machine, in
> static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int e_machine, int id)
> {
> struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, id);
> - return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
> + return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(unaugmented_prog);
> }
>
> static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int e_machine, int id)
> {
> struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, id);
> - return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
> + return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(unaugmented_prog);
> }
>
> static int trace__bpf_sys_enter_beauty_map(struct trace *trace, int e_machine, int key, unsigned int *beauty_array)
> @@ -3901,7 +3880,7 @@ static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace
> bool is_candidate = false;
>
> if (pair == NULL || pair->id == sc->id ||
> - pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented)
> + pair->bpf_prog.sys_enter == unaugmented_prog)
> continue;
>
> for (field = sc->args, candidate_field = pair->args;
> @@ -3967,7 +3946,7 @@ static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace
> */
> if (pair_prog == NULL) {
> pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
> - if (pair_prog == trace->skel->progs.syscall_unaugmented)
> + if (pair_prog == unaugmented_prog)
> goto next_candidate;
> }
>
> @@ -3983,12 +3962,17 @@ static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace
>
> static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_machine)
> {
> - int map_enter_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_enter);
> - int map_exit_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_exit);
> - int beauty_map_fd = bpf_map__fd(trace->skel->maps.beauty_map_enter);
> + int map_enter_fd;
> + int map_exit_fd;
> + int beauty_map_fd;
> int err = 0;
> unsigned int beauty_array[6];
>
> + if (augmented_syscalls__get_map_fds(&map_enter_fd, &map_exit_fd, &beauty_map_fd) < 0)
> + return -1;
> +
> + unaugmented_prog = augmented_syscalls__unaugmented();
> +
> for (int i = 0, num_idx = syscalltbl__num_idx(e_machine); i < num_idx; ++i) {
> int prog_fd, key = syscalltbl__id_at_idx(e_machine, i);
>
> @@ -4058,7 +4042,7 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_m
> * For now we're just reusing the sys_enter prog, and if it
> * already has an augmenter, we don't need to find one.
> */
> - if (sc->bpf_prog.sys_enter != trace->skel->progs.syscall_unaugmented)
> + if (sc->bpf_prog.sys_enter != unaugmented_prog)
> continue;
>
> /*
> @@ -4083,7 +4067,13 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_m
>
> return err;
> }
> -#endif // HAVE_BPF_SKEL
> +#else // !HAVE_LIBBPF_SUPPORT
> +static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused,
> + int e_machine __maybe_unused)
> +{
> + return -1;
> +}
> +#endif // HAVE_LIBBPF_SUPPORT
>
> static int trace__set_ev_qualifier_filter(struct trace *trace)
> {
> @@ -4092,24 +4082,6 @@ static int trace__set_ev_qualifier_filter(struct trace *trace)
> return 0;
> }
>
> -static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
> - size_t npids __maybe_unused, pid_t *pids __maybe_unused)
> -{
> - int err = 0;
> -#ifdef HAVE_LIBBPF_SUPPORT
> - bool value = true;
> - int map_fd = bpf_map__fd(map);
> - size_t i;
> -
> - for (i = 0; i < npids; ++i) {
> - err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
> - if (err)
> - break;
> - }
> -#endif
> - return err;
> -}
> -
> static int trace__set_filter_loop_pids(struct trace *trace)
> {
> unsigned int nr = 1, err;
> @@ -4138,8 +4110,8 @@ static int trace__set_filter_loop_pids(struct trace *trace)
> thread__put(thread);
>
> err = evlist__append_tp_filter_pids(trace->evlist, nr, pids);
> - if (!err && trace->filter_pids.map)
> - err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
> + if (!err)
> + err = augmented_syscalls__set_filter_pids(nr, pids);
>
> return err;
> }
> @@ -4156,8 +4128,8 @@ static int trace__set_filter_pids(struct trace *trace)
> if (trace->filter_pids.nr > 0) {
> err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
> trace->filter_pids.entries);
> - if (!err && trace->filter_pids.map) {
> - err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
> + if (!err) {
> + err = augmented_syscalls__set_filter_pids(trace->filter_pids.nr,
> trace->filter_pids.entries);
> }
> } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
> @@ -4480,41 +4452,18 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
> err = evlist__open(evlist);
> if (err < 0)
> goto out_error_open;
> -#ifdef HAVE_BPF_SKEL
> - if (trace->syscalls.events.bpf_output) {
> - struct perf_cpu cpu;
>
> - /*
> - * Set up the __augmented_syscalls__ BPF map to hold for each
> - * CPU the bpf-output event's file descriptor.
> - */
> - perf_cpu_map__for_each_cpu(cpu, i, trace->syscalls.events.bpf_output->core.cpus) {
> - int mycpu = cpu.cpu;
> -
> - bpf_map__update_elem(trace->skel->maps.__augmented_syscalls__,
> - &mycpu, sizeof(mycpu),
> - xyarray__entry(trace->syscalls.events.bpf_output->core.fd,
> - mycpu, 0),
> - sizeof(__u32), BPF_ANY);
> - }
> - }
> + augmented_syscalls__setup_bpf_output();
>
> - if (trace->skel)
> - trace->filter_pids.map = trace->skel->maps.pids_filtered;
> -#endif
> err = trace__set_filter_pids(trace);
> if (err < 0)
> goto out_error_mem;
>
> -#ifdef HAVE_BPF_SKEL
> - if (trace->skel && trace->skel->progs.sys_enter) {
> - /*
> - * TODO: Initialize for all host binary machine types, not just
> - * those matching the perf binary.
> - */
> - trace__init_syscalls_bpf_prog_array_maps(trace, EM_HOST);
> - }
> -#endif
> + /*
> + * TODO: Initialize for all host binary machine types, not just
> + * those matching the perf binary.
> + */
> + trace__init_syscalls_bpf_prog_array_maps(trace, EM_HOST);
>
> if (trace->ev_qualifier_ids.nr > 0) {
> err = trace__set_ev_qualifier_filter(trace);
> @@ -5375,18 +5324,6 @@ static void trace__exit(struct trace *trace)
> #endif
> }
>
> -#ifdef HAVE_BPF_SKEL
> -static int bpf__setup_bpf_output(struct evlist *evlist)
> -{
> - int err = parse_event(evlist, "bpf-output/no-inherit=1,name=__augmented_syscalls__/");
> -
> - if (err)
> - pr_debug("ERROR: failed to create the \"__augmented_syscalls__\" bpf-output event\n");
> -
> - return err;
> -}
> -#endif
> -
> int cmd_trace(int argc, const char **argv)
> {
> const char *trace_usage[] = {
> @@ -5580,7 +5517,6 @@ int cmd_trace(int argc, const char **argv)
> "cgroup monitoring only available in system-wide mode");
> }
>
> -#ifdef HAVE_BPF_SKEL
> if (!trace.trace_syscalls)
> goto skip_augmentation;
>
> @@ -5599,42 +5535,17 @@ int cmd_trace(int argc, const char **argv)
> goto skip_augmentation;
> }
>
> - trace.skel = augmented_raw_syscalls_bpf__open();
> - if (!trace.skel) {
> - pr_debug("Failed to open augmented syscalls BPF skeleton");
> - } else {
> - /*
> - * Disable attaching the BPF programs except for sys_enter and
> - * sys_exit that tail call into this as necessary.
> - */
> - struct bpf_program *prog;
> + err = augmented_syscalls__prepare();
> + if (err < 0)
> + goto skip_augmentation;
>
> - bpf_object__for_each_program(prog, trace.skel->obj) {
> - if (prog != trace.skel->progs.sys_enter && prog != trace.skel->progs.sys_exit)
> - bpf_program__set_autoattach(prog, /*autoattach=*/false);
> - }
> + trace__add_syscall_newtp(&trace);
>
> - err = augmented_raw_syscalls_bpf__load(trace.skel);
> + err = augmented_syscalls__create_bpf_output(trace.evlist);
> + if (err == 0)
> + trace.syscalls.events.bpf_output = evlist__last(trace.evlist);
>
> - if (err < 0) {
> - libbpf_strerror(err, bf, sizeof(bf));
> - pr_debug("Failed to load augmented syscalls BPF skeleton: %s\n", bf);
> - } else {
> - augmented_raw_syscalls_bpf__attach(trace.skel);
> - trace__add_syscall_newtp(&trace);
> - }
> - }
> -
> - err = bpf__setup_bpf_output(trace.evlist);
> - if (err) {
> - libbpf_strerror(err, bf, sizeof(bf));
> - pr_err("ERROR: Setup BPF output event failed: %s\n", bf);
> - goto out;
> - }
> - trace.syscalls.events.bpf_output = evlist__last(trace.evlist);
> - assert(evsel__name_is(trace.syscalls.events.bpf_output, "__augmented_syscalls__"));
> skip_augmentation:
> -#endif
> err = -1;
>
> if (trace.trace_pgfaults) {
> @@ -5831,8 +5742,6 @@ int cmd_trace(int argc, const char **argv)
> fclose(trace.output);
> out:
> trace__exit(&trace);
> -#ifdef HAVE_BPF_SKEL
> - augmented_raw_syscalls_bpf__destroy(trace.skel);
> -#endif
> + augmented_syscalls__cleanup();
> return err;
> }
> diff --git a/tools/perf/util/Build b/tools/perf/util/Build
> index 7910d908c814feec..17c7b71128d15970 100644
> --- a/tools/perf/util/Build
> +++ b/tools/perf/util/Build
> @@ -175,6 +175,7 @@ perf-util-$(CONFIG_PERF_BPF_SKEL) += btf.o
>
> ifeq ($(CONFIG_TRACE),y)
> perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf-trace-summary.o
> + perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_trace_augment.o
> endif
>
> ifeq ($(CONFIG_LIBTRACEEVENT),y)
> diff --git a/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c b/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c
> index e4352881e3faa602..cb86e261b4de0685 100644
> --- a/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c
> +++ b/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c
> @@ -7,7 +7,6 @@
> */
>
> #include "vmlinux.h"
> -#include "../trace_augment.h"
>
> #include <bpf/bpf_helpers.h>
> #include <linux/limits.h>
> @@ -27,6 +26,8 @@
>
> #define MAX_CPUS 4096
>
> +#define TRACE_AUG_MAX_BUF 32 /* for buffer augmentation in perf trace */
> +
> /* bpf-output associated map */
> struct __augmented_syscalls__ {
> __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
> diff --git a/tools/perf/util/bpf_trace_augment.c b/tools/perf/util/bpf_trace_augment.c
> new file mode 100644
> index 0000000000000000..56ed17534caa4f3f
> --- /dev/null
> +++ b/tools/perf/util/bpf_trace_augment.c
> @@ -0,0 +1,143 @@
> +#include <bpf/libbpf.h>
> +#include <internal/xyarray.h>
> +
> +#include "util/debug.h"
> +#include "util/evlist.h"
> +#include "util/trace_augment.h"
> +
> +#include "bpf_skel/augmented_raw_syscalls.skel.h"
> +
> +static struct augmented_raw_syscalls_bpf *skel;
> +static struct evsel *bpf_output;
> +
> +int augmented_syscalls__prepare(void)
> +{
> + struct bpf_program *prog;
> + char buf[128];
> + int err;
> +
> + skel = augmented_raw_syscalls_bpf__open();
> + if (!skel) {
> + pr_debug("Failed to open augmented syscalls BPF skeleton\n");
> + return -errno;
> + }
> +
> + /*
> + * Disable attaching the BPF programs except for sys_enter and
> + * sys_exit that tail call into this as necessary.
> + */
> + bpf_object__for_each_program(prog, skel->obj) {
> + if (prog != skel->progs.sys_enter && prog != skel->progs.sys_exit)
> + bpf_program__set_autoattach(prog, /*autoattach=*/false);
> + }
> +
> + err = augmented_raw_syscalls_bpf__load(skel);
> + if (err < 0) {
> + libbpf_strerror(err, buf, sizeof(buf));
> + pr_debug("Failed to load augmented syscalls BPF skeleton: %s\n", buf);
> + return err;
> + }
> +
> + augmented_raw_syscalls_bpf__attach(skel);
> + return 0;
> +}
> +
> +int augmented_syscalls__create_bpf_output(struct evlist *evlist)
> +{
> + int err = parse_event(evlist, "bpf-output/no-inherit=1,name=__augmented_syscalls__/");
> +
> + if (err) {
> + pr_err("ERROR: Setup BPF output event failed: %d\n", err);
> + return err;
> + }
> +
> + bpf_output = evlist__last(evlist);
> + assert(evsel__name_is(bpf_output, "__augmented_syscalls__"));
> +
> + return 0;
> +}
> +
> +void augmented_syscalls__setup_bpf_output(void)
> +{
> + struct perf_cpu cpu;
> + int i;
> +
> + if (bpf_output == NULL)
> + return;
> +
> + /*
> + * Set up the __augmented_syscalls__ BPF map to hold for each
> + * CPU the bpf-output event's file descriptor.
> + */
> + perf_cpu_map__for_each_cpu(cpu, i, bpf_output->core.cpus) {
> + int mycpu = cpu.cpu;
> +
> + bpf_map__update_elem(skel->maps.__augmented_syscalls__,
> + &mycpu, sizeof(mycpu),
> + xyarray__entry(bpf_output->core.fd,
> + mycpu, 0),
> + sizeof(__u32), BPF_ANY);
> + }
> +}
> +
> +int augmented_syscalls__set_filter_pids(unsigned int nr, pid_t *pids)
> +{
> + bool value = true;
> + int err = 0;
> +
> + if (skel == NULL)
> + return 0;
> +
> + for (size_t i = 0; i < nr; ++i) {
> + err = bpf_map__update_elem(skel->maps.pids_filtered, &pids[i],
> + sizeof(*pids), &value, sizeof(value),
> + BPF_ANY);
> + if (err)
> + break;
> + }
> + return err;
> +}
> +
> +int augmented_syscalls__get_map_fds(int *enter_fd, int *exit_fd, int *beauty_fd)
> +{
> + if (skel == NULL)
> + return -1;
> +
> + *enter_fd = bpf_map__fd(skel->maps.syscalls_sys_enter);
> + *exit_fd = bpf_map__fd(skel->maps.syscalls_sys_exit);
> + *beauty_fd = bpf_map__fd(skel->maps.beauty_map_enter);
> +
> + if (*enter_fd < 0 || *exit_fd < 0 || *beauty_fd < 0) {
> + pr_err("Error: failed to get syscall or beauty map fd\n");
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +struct bpf_program *augmented_syscalls__unaugmented(void)
> +{
> + return skel->progs.syscall_unaugmented;
> +}
> +
> +struct bpf_program *augmented_syscalls__find_by_title(const char *name)
> +{
> + struct bpf_program *pos;
> + const char *sec_name;
> +
> + if (skel->obj == NULL)
> + return NULL;
> +
> + bpf_object__for_each_program(pos, skel->obj) {
> + sec_name = bpf_program__section_name(pos);
> + if (sec_name && !strcmp(sec_name, name))
> + return pos;
> + }
> +
> + return NULL;
> +}
> +
> +void augmented_syscalls__cleanup(void)
> +{
> + augmented_raw_syscalls_bpf__destroy(skel);
> +}
> diff --git a/tools/perf/util/trace_augment.h b/tools/perf/util/trace_augment.h
> index 57a3e50459377983..4f729bc6775304b4 100644
> --- a/tools/perf/util/trace_augment.h
> +++ b/tools/perf/util/trace_augment.h
> @@ -1,6 +1,66 @@
> #ifndef TRACE_AUGMENT_H
> #define TRACE_AUGMENT_H
>
> -#define TRACE_AUG_MAX_BUF 32 /* for buffer augmentation in perf trace */
> +#include <linux/compiler.h>
> +
> +struct bpf_program;
> +struct evlist;
> +
> +#ifdef HAVE_BPF_SKEL
> +
> +int augmented_syscalls__prepare(void);
> +int augmented_syscalls__create_bpf_output(struct evlist *evlist);
> +void augmented_syscalls__setup_bpf_output(void);
> +int augmented_syscalls__set_filter_pids(unsigned int nr, pid_t *pids);
> +int augmented_syscalls__get_map_fds(int *enter_fd, int *exit_fd, int *beauty_fd);
> +struct bpf_program *augmented_syscalls__find_by_title(const char *name);
> +struct bpf_program *augmented_syscalls__unaugmented(void);
> +void augmented_syscalls__cleanup(void);
> +
> +#else /* !HAVE_BPF_SKEL */
> +
> +static inline int augmented_syscalls__prepare(void)
> +{
> + return -1;
> +}
> +
> +static inline int augmented_syscalls__create_bpf_output(struct evlist *evlist __maybe_unused)
> +{
> + return -1;
> +}
> +
> +static inline void augmented_syscalls__setup_bpf_output(void)
> +{
> +}
> +
> +static inline int augmented_syscalls__set_filter_pids(unsigned int nr __maybe_unused,
> + pid_t *pids __maybe_unused)
> +{
> + return 0;
> +}
> +
> +static inline int augmented_syscalls__get_map_fds(int *enter_fd __maybe_unused,
> + int *exit_fd __maybe_unused,
> + int *beauty_fd __maybe_unused)
> +{
> + return -1;
> +}
> +
> +static inline struct bpf_program *
> +augmented_syscalls__find_by_title(const char *name __maybe_unused)
> +{
> + return NULL;
> +}
> +
> +static inline struct bpf_program *augmented_syscalls__unaugmented(void)
> +{
> + return NULL;
> +}
> +
> +static inline void augmented_syscalls__cleanup(void)
> +{
> +}
> +
> +#endif /* HAVE_BPF_SKEL */
>
> #endif
> --
> 2.49.0
