128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2021 Facebook */
|
|
#include <test_progs.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include "find_vma.skel.h"
|
|
#include "find_vma_fail1.skel.h"
|
|
#include "find_vma_fail2.skel.h"
|
|
|
|
static void test_and_reset_skel(struct find_vma *skel, int expected_find_zero_ret, bool need_test)
|
|
{
|
|
if (need_test) {
|
|
ASSERT_EQ(skel->bss->found_vm_exec, 1, "found_vm_exec");
|
|
ASSERT_EQ(skel->data->find_addr_ret, 0, "find_addr_ret");
|
|
ASSERT_EQ(skel->data->find_zero_ret, expected_find_zero_ret, "find_zero_ret");
|
|
ASSERT_OK_PTR(strstr(skel->bss->d_iname, "test_progs"), "find_test_progs");
|
|
}
|
|
|
|
skel->bss->found_vm_exec = 0;
|
|
skel->data->find_addr_ret = -1;
|
|
skel->data->find_zero_ret = -1;
|
|
skel->bss->d_iname[0] = 0;
|
|
}
|
|
|
|
static int open_pe(void)
|
|
{
|
|
struct perf_event_attr attr = {0};
|
|
int pfd;
|
|
|
|
/* create perf event */
|
|
attr.size = sizeof(attr);
|
|
attr.type = PERF_TYPE_HARDWARE;
|
|
attr.config = PERF_COUNT_HW_CPU_CYCLES;
|
|
attr.freq = 1;
|
|
attr.sample_freq = 1000;
|
|
pfd = syscall(__NR_perf_event_open, &attr, 0, -1, -1, PERF_FLAG_FD_CLOEXEC);
|
|
|
|
return pfd >= 0 ? pfd : -errno;
|
|
}
|
|
|
|
static bool find_vma_pe_condition(struct find_vma *skel)
|
|
{
|
|
return skel->bss->found_vm_exec == 0 ||
|
|
skel->data->find_addr_ret != 0 ||
|
|
skel->data->find_zero_ret == -1 ||
|
|
strcmp(skel->bss->d_iname, "test_progs") != 0;
|
|
}
|
|
|
|
static void test_find_vma_pe(struct find_vma *skel)
|
|
{
|
|
struct bpf_link *link = NULL;
|
|
volatile int j = 0;
|
|
int pfd, i;
|
|
const int one_bn = 1000000000;
|
|
|
|
pfd = open_pe();
|
|
if (pfd < 0) {
|
|
if (pfd == -ENOENT || pfd == -EOPNOTSUPP) {
|
|
printf("%s:SKIP:no PERF_COUNT_HW_CPU_CYCLES\n", __func__);
|
|
test__skip();
|
|
goto cleanup;
|
|
}
|
|
if (!ASSERT_GE(pfd, 0, "perf_event_open"))
|
|
goto cleanup;
|
|
}
|
|
|
|
link = bpf_program__attach_perf_event(skel->progs.handle_pe, pfd);
|
|
if (!ASSERT_OK_PTR(link, "attach_perf_event"))
|
|
goto cleanup;
|
|
|
|
for (i = 0; i < one_bn && find_vma_pe_condition(skel); ++i)
|
|
++j;
|
|
|
|
test_and_reset_skel(skel, -EBUSY /* in nmi, irq_work is busy */, i == one_bn);
|
|
cleanup:
|
|
bpf_link__destroy(link);
|
|
close(pfd);
|
|
}
|
|
|
|
static void test_find_vma_kprobe(struct find_vma *skel)
|
|
{
|
|
int err;
|
|
|
|
err = find_vma__attach(skel);
|
|
if (!ASSERT_OK(err, "get_branch_snapshot__attach"))
|
|
return;
|
|
|
|
getpgid(skel->bss->target_pid);
|
|
test_and_reset_skel(skel, -ENOENT /* could not find vma for ptr 0 */, true);
|
|
}
|
|
|
|
static void test_illegal_write_vma(void)
|
|
{
|
|
struct find_vma_fail1 *skel;
|
|
|
|
skel = find_vma_fail1__open_and_load();
|
|
if (!ASSERT_ERR_PTR(skel, "find_vma_fail1__open_and_load"))
|
|
find_vma_fail1__destroy(skel);
|
|
}
|
|
|
|
static void test_illegal_write_task(void)
|
|
{
|
|
struct find_vma_fail2 *skel;
|
|
|
|
skel = find_vma_fail2__open_and_load();
|
|
if (!ASSERT_ERR_PTR(skel, "find_vma_fail2__open_and_load"))
|
|
find_vma_fail2__destroy(skel);
|
|
}
|
|
|
|
void serial_test_find_vma(void)
|
|
{
|
|
struct find_vma *skel;
|
|
|
|
skel = find_vma__open_and_load();
|
|
if (!ASSERT_OK_PTR(skel, "find_vma__open_and_load"))
|
|
return;
|
|
|
|
skel->bss->target_pid = getpid();
|
|
skel->bss->addr = (__u64)(uintptr_t)test_find_vma_pe;
|
|
|
|
test_find_vma_pe(skel);
|
|
test_find_vma_kprobe(skel);
|
|
|
|
find_vma__destroy(skel);
|
|
test_illegal_write_vma();
|
|
test_illegal_write_task();
|
|
}
|