ba83af0591
Remove unneeded spleep and increase length of dummy CPU intensive computation to guarantee test process execution. Also, complete aforemention computation as soon as test success criteria is met Signed-off-by: Mykola Lysenko <mykolal@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220308200449.1757478-4-mykolal@fb.com
128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2021 Facebook */
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#include <test_progs.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "find_vma.skel.h"
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#include "find_vma_fail1.skel.h"
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#include "find_vma_fail2.skel.h"
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static void test_and_reset_skel(struct find_vma *skel, int expected_find_zero_ret, bool need_test)
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{
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if (need_test) {
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ASSERT_EQ(skel->bss->found_vm_exec, 1, "found_vm_exec");
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ASSERT_EQ(skel->data->find_addr_ret, 0, "find_addr_ret");
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ASSERT_EQ(skel->data->find_zero_ret, expected_find_zero_ret, "find_zero_ret");
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ASSERT_OK_PTR(strstr(skel->bss->d_iname, "test_progs"), "find_test_progs");
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}
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skel->bss->found_vm_exec = 0;
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skel->data->find_addr_ret = -1;
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skel->data->find_zero_ret = -1;
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skel->bss->d_iname[0] = 0;
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}
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static int open_pe(void)
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{
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struct perf_event_attr attr = {0};
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int pfd;
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/* create perf event */
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attr.size = sizeof(attr);
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attr.type = PERF_TYPE_HARDWARE;
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attr.config = PERF_COUNT_HW_CPU_CYCLES;
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attr.freq = 1;
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attr.sample_freq = 1000;
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pfd = syscall(__NR_perf_event_open, &attr, 0, -1, -1, PERF_FLAG_FD_CLOEXEC);
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return pfd >= 0 ? pfd : -errno;
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}
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static bool find_vma_pe_condition(struct find_vma *skel)
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{
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return skel->bss->found_vm_exec == 0 ||
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skel->data->find_addr_ret != 0 ||
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skel->data->find_zero_ret == -1 ||
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strcmp(skel->bss->d_iname, "test_progs") != 0;
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}
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static void test_find_vma_pe(struct find_vma *skel)
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{
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struct bpf_link *link = NULL;
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volatile int j = 0;
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int pfd, i;
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const int one_bn = 1000000000;
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pfd = open_pe();
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if (pfd < 0) {
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if (pfd == -ENOENT || pfd == -EOPNOTSUPP) {
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printf("%s:SKIP:no PERF_COUNT_HW_CPU_CYCLES\n", __func__);
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test__skip();
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goto cleanup;
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}
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if (!ASSERT_GE(pfd, 0, "perf_event_open"))
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goto cleanup;
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}
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link = bpf_program__attach_perf_event(skel->progs.handle_pe, pfd);
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if (!ASSERT_OK_PTR(link, "attach_perf_event"))
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goto cleanup;
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for (i = 0; i < one_bn && find_vma_pe_condition(skel); ++i)
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++j;
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test_and_reset_skel(skel, -EBUSY /* in nmi, irq_work is busy */, i == one_bn);
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cleanup:
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bpf_link__destroy(link);
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close(pfd);
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}
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static void test_find_vma_kprobe(struct find_vma *skel)
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{
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int err;
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err = find_vma__attach(skel);
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if (!ASSERT_OK(err, "get_branch_snapshot__attach"))
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return;
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getpgid(skel->bss->target_pid);
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test_and_reset_skel(skel, -ENOENT /* could not find vma for ptr 0 */, true);
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}
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static void test_illegal_write_vma(void)
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{
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struct find_vma_fail1 *skel;
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skel = find_vma_fail1__open_and_load();
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if (!ASSERT_ERR_PTR(skel, "find_vma_fail1__open_and_load"))
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find_vma_fail1__destroy(skel);
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}
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static void test_illegal_write_task(void)
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{
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struct find_vma_fail2 *skel;
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skel = find_vma_fail2__open_and_load();
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if (!ASSERT_ERR_PTR(skel, "find_vma_fail2__open_and_load"))
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find_vma_fail2__destroy(skel);
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}
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void serial_test_find_vma(void)
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{
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struct find_vma *skel;
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skel = find_vma__open_and_load();
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if (!ASSERT_OK_PTR(skel, "find_vma__open_and_load"))
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return;
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skel->bss->target_pid = getpid();
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skel->bss->addr = (__u64)(uintptr_t)test_find_vma_pe;
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test_find_vma_pe(skel);
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test_find_vma_kprobe(skel);
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find_vma__destroy(skel);
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test_illegal_write_vma();
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test_illegal_write_task();
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}
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