selftests/bpf: Refactor stacktrace_map case with skeleton

The loading method of the stacktrace_map test case looks too outdated,
refactor it with skeleton, and we can use global variable feature in
the next patch.

Signed-off-by: Tao Chen <chen.dylane@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250925175030.1615837-2-chen.dylane@linux.dev

1 files changed, 0 insertions, 76 deletions

diff --git a/tools/testing/selftests/bpf/progs/test_stacktrace_map.c b/tools/testing/selftests/bpf/progs/test_stacktrace_map.c
deleted file mode 100644
index 47568007b668..000000000000
--- a/tools/testing/selftests/bpf/progs/test_stacktrace_map.c
+++ /dev/null
@@ -1,76 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (c) 2018 Facebook
-
-#include <vmlinux.h>
-#include <bpf/bpf_helpers.h>
-
-#ifndef PERF_MAX_STACK_DEPTH
-#define PERF_MAX_STACK_DEPTH         127
-#endif
-
-struct {
-	__uint(type, BPF_MAP_TYPE_ARRAY);
-	__uint(max_entries, 1);
-	__type(key, __u32);
-	__type(value, __u32);
-} control_map SEC(".maps");
-
-struct {
-	__uint(type, BPF_MAP_TYPE_HASH);
-	__uint(max_entries, 16384);
-	__type(key, __u32);
-	__type(value, __u32);
-} stackid_hmap SEC(".maps");
-
-typedef __u64 stack_trace_t[PERF_MAX_STACK_DEPTH];
-
-struct {
-	__uint(type, BPF_MAP_TYPE_STACK_TRACE);
-	__uint(max_entries, 16384);
-	__type(key, __u32);
-	__type(value, stack_trace_t);
-} stackmap SEC(".maps");
-
-struct {
-	__uint(type, BPF_MAP_TYPE_ARRAY);
-	__uint(max_entries, 16384);
-	__type(key, __u32);
-	__type(value, stack_trace_t);
-} stack_amap SEC(".maps");
-
-/* taken from /sys/kernel/tracing/events/sched/sched_switch/format */
-struct sched_switch_args {
-	unsigned long long pad;
-	char prev_comm[TASK_COMM_LEN];
-	int prev_pid;
-	int prev_prio;
-	long long prev_state;
-	char next_comm[TASK_COMM_LEN];
-	int next_pid;
-	int next_prio;
-};
-
-SEC("tracepoint/sched/sched_switch")
-int oncpu(struct sched_switch_args *ctx)
-{
-	__u32 max_len = PERF_MAX_STACK_DEPTH * sizeof(__u64);
-	__u32 key = 0, val = 0, *value_p;
-	void *stack_p;
-
-	value_p = bpf_map_lookup_elem(&control_map, &key);
-	if (value_p && *value_p)
-		return 0; /* skip if non-zero *value_p */
-
-	/* The size of stackmap and stackid_hmap should be the same */
-	key = bpf_get_stackid(ctx, &stackmap, 0);
-	if ((int)key >= 0) {
-		bpf_map_update_elem(&stackid_hmap, &key, &val, 0);
-		stack_p = bpf_map_lookup_elem(&stack_amap, &key);
-		if (stack_p)
-			bpf_get_stack(ctx, stack_p, max_len, 0);
-	}
-
-	return 0;
-}
-
-char _license[] SEC("license") = "GPL";