// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <test_progs.h>
#include "test_task_pt_regs.skel.h"

/* uprobe attach point */
static noinline void trigger_func(void)
{
        asm volatile ("");
}

void test_task_pt_regs(void)
{
        struct test_task_pt_regs *skel;
        struct bpf_link *uprobe_link;
        ssize_t uprobe_offset;
        bool match;

        uprobe_offset = get_uprobe_offset(&trigger_func);
        if (!ASSERT_GE(uprobe_offset, 0, "uprobe_offset"))
                return;

        skel = test_task_pt_regs__open_and_load();
        if (!ASSERT_OK_PTR(skel, "skel_open"))
                return;
        if (!ASSERT_OK_PTR(skel->bss, "check_bss"))
                goto cleanup;

        uprobe_link = bpf_program__attach_uprobe(skel->progs.handle_uprobe,
                                                 false /* retprobe */,
                                                 0 /* self pid */,
                                                 "/proc/self/exe",
                                                 uprobe_offset);
        if (!ASSERT_OK_PTR(uprobe_link, "attach_uprobe"))
                goto cleanup;
        skel->links.handle_uprobe = uprobe_link;

        /* trigger & validate uprobe */
        trigger_func();

        if (!ASSERT_EQ(skel->bss->uprobe_res, 1, "check_uprobe_res"))
                goto cleanup;

        match = !memcmp(&skel->bss->current_regs, &skel->bss->ctx_regs,
                        sizeof(skel->bss->current_regs));
        ASSERT_TRUE(match, "check_regs_match");

cleanup:
        test_task_pt_regs__destroy(skel);
}