perf-hooks.c

Go to the documentation of this file.

// SPDX-License-Identifier: GPL-2.0
#include <signal.h>
#include <stdlib.h>

#include "tests.h"
#include "debug.h"
#include "util.h"
#include "perf-hooks.h"

static void sigsegv_handler(int sig __maybe_unused)
{
    pr_debug("SIGSEGV is observed as expected, try to recover.\n");
    perf_hooks__recover();
    signal(SIGSEGV, SIG_DFL);
    raise(SIGSEGV);
    exit(-1);
}


static void the_hook(void *_hook_flags)
{
    int *hook_flags = _hook_flags;
    int *p = NULL;

    *hook_flags = 1234;

    /* Generate a segfault, test perf_hooks__recover */
    *p = 0;
}

int test__perf_hooks(struct test *test __maybe_unused, int subtest __maybe_unused)
{
    int hook_flags = 0;

    signal(SIGSEGV, sigsegv_handler);
    perf_hooks__set_hook("test", the_hook, &hook_flags);
    perf_hooks__invoke_test();

    /* hook is triggered? */
    if (hook_flags != 1234) {
        pr_debug("Setting failed: %d (%p)\n", hook_flags, &hook_flags);
        return TEST_FAIL;
    }

    /* the buggy hook is removed? */
    if (perf_hooks__get_hook("test"))
        return TEST_FAIL;
    return TEST_OK;
}