selftests/bpf: lazy-load trigger bench BPF programs

Instead of front-loading all possible benchmarking BPF programs for
trigger benchmarks, explicitly specify which BPF programs are used by
specific benchmark and load only it.

This allows to be more flexible in supporting older kernels, where some
program types might not be possible to load (e.g., those that rely on
newly added kfunc).

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20240326162151.3981687-5-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 9 insertions, 9 deletions

diff --git a/tools/testing/selftests/bpf/progs/trigger_bench.c b/tools/testing/selftests/bpf/progs/trigger_bench.c
index 81990e45b547..07587cb3c9f5 100644
--- a/tools/testing/selftests/bpf/progs/trigger_bench.c
+++ b/tools/testing/selftests/bpf/progs/trigger_bench.c
@@ -25,7 +25,7 @@ static __always_inline void inc_counter(void)
 	__sync_add_and_fetch(&hits[cpu & CPU_MASK].value, 1);
 }
 
-SEC("uprobe")
+SEC("?uprobe")
 int bench_trigger_uprobe(void *ctx)
 {
 	inc_counter();
@@ -34,7 +34,7 @@ int bench_trigger_uprobe(void *ctx)
 
 const volatile int batch_iters = 0;
 
-SEC("raw_tp")
+SEC("?raw_tp")
 int trigger_count(void *ctx)
 {
 	int i;
@@ -45,7 +45,7 @@ int trigger_count(void *ctx)
 	return 0;
 }
 
-SEC("raw_tp")
+SEC("?raw_tp")
 int trigger_driver(void *ctx)
 {
 	int i;
@@ -56,42 +56,42 @@ int trigger_driver(void *ctx)
 	return 0;
 }
 
-SEC("kprobe/bpf_get_numa_node_id")
+SEC("?kprobe/bpf_get_numa_node_id")
 int bench_trigger_kprobe(void *ctx)
 {
 	inc_counter();
 	return 0;
 }
 
-SEC("kretprobe/bpf_get_numa_node_id")
+SEC("?kretprobe/bpf_get_numa_node_id")
 int bench_trigger_kretprobe(void *ctx)
 {
 	inc_counter();
 	return 0;
 }
 
-SEC("kprobe.multi/bpf_get_numa_node_id")
+SEC("?kprobe.multi/bpf_get_numa_node_id")
 int bench_trigger_kprobe_multi(void *ctx)
 {
 	inc_counter();
 	return 0;
 }
 
-SEC("kretprobe.multi/bpf_get_numa_node_id")
+SEC("?kretprobe.multi/bpf_get_numa_node_id")
 int bench_trigger_kretprobe_multi(void *ctx)
 {
 	inc_counter();
 	return 0;
 }
 
-SEC("fentry/bpf_get_numa_node_id")
+SEC("?fentry/bpf_get_numa_node_id")
 int bench_trigger_fentry(void *ctx)
 {
 	inc_counter();
 	return 0;
 }
 
-SEC("fexit/bpf_get_numa_node_id")
+SEC("?fexit/bpf_get_numa_node_id")
 int bench_trigger_fexit(void *ctx)
 {
 	inc_counter();