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// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include <stdbool.h>
#include "bpf_kfuncs.h"
#include "bpf_misc.h"
char _license[] SEC("license") = "GPL";
int pid = 0;
int idx_entry = 0;
int idx_return = 0;
__u64 test_uprobe_cookie_entry[6];
__u64 test_uprobe_cookie_return[3];
static int check_cookie(void)
{
__u64 *cookie = bpf_session_cookie();
if (bpf_session_is_return()) {
if (idx_return >= ARRAY_SIZE(test_uprobe_cookie_return))
return 1;
test_uprobe_cookie_return[idx_return++] = *cookie;
return 0;
}
if (idx_entry >= ARRAY_SIZE(test_uprobe_cookie_entry))
return 1;
*cookie = test_uprobe_cookie_entry[idx_entry];
return idx_entry++ % 2;
}
SEC("uprobe.session//proc/self/exe:uprobe_session_recursive")
int uprobe_recursive(struct pt_regs *ctx)
{
if (bpf_get_current_pid_tgid() >> 32 != pid)
return 1;
return check_cookie();
}
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