119 lines
3.3 KiB
C
119 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
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#include <test_progs.h>
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#include "test_build_id.skel.h"
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static char build_id[BPF_BUILD_ID_SIZE];
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static int build_id_sz;
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static void print_stack(struct bpf_stack_build_id *stack, int frame_cnt)
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{
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int i, j;
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for (i = 0; i < frame_cnt; i++) {
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printf("FRAME #%02d: ", i);
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switch (stack[i].status) {
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case BPF_STACK_BUILD_ID_EMPTY:
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printf("<EMPTY>\n");
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break;
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case BPF_STACK_BUILD_ID_VALID:
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printf("BUILD ID = ");
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for (j = 0; j < BPF_BUILD_ID_SIZE; j++)
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printf("%02hhx", (unsigned)stack[i].build_id[j]);
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printf(" OFFSET = %llx", (unsigned long long)stack[i].offset);
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break;
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case BPF_STACK_BUILD_ID_IP:
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printf("IP = %llx", (unsigned long long)stack[i].ip);
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break;
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default:
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printf("UNEXPECTED STATUS %d ", stack[i].status);
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break;
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}
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printf("\n");
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}
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}
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static void subtest_nofault(bool build_id_resident)
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{
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struct test_build_id *skel;
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struct bpf_stack_build_id *stack;
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int frame_cnt;
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skel = test_build_id__open_and_load();
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if (!ASSERT_OK_PTR(skel, "skel_open"))
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return;
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skel->links.uprobe_nofault = bpf_program__attach(skel->progs.uprobe_nofault);
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if (!ASSERT_OK_PTR(skel->links.uprobe_nofault, "link"))
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goto cleanup;
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if (build_id_resident)
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ASSERT_OK(system("./uprobe_multi uprobe-paged-in"), "trigger_uprobe");
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else
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ASSERT_OK(system("./uprobe_multi uprobe-paged-out"), "trigger_uprobe");
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if (!ASSERT_GT(skel->bss->res_nofault, 0, "res"))
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goto cleanup;
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stack = skel->bss->stack_nofault;
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frame_cnt = skel->bss->res_nofault / sizeof(struct bpf_stack_build_id);
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if (env.verbosity >= VERBOSE_NORMAL)
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print_stack(stack, frame_cnt);
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if (build_id_resident) {
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ASSERT_EQ(stack[0].status, BPF_STACK_BUILD_ID_VALID, "build_id_status");
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ASSERT_EQ(memcmp(stack[0].build_id, build_id, build_id_sz), 0, "build_id_match");
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} else {
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ASSERT_EQ(stack[0].status, BPF_STACK_BUILD_ID_IP, "build_id_status");
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}
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cleanup:
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test_build_id__destroy(skel);
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}
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static void subtest_sleepable(void)
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{
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struct test_build_id *skel;
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struct bpf_stack_build_id *stack;
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int frame_cnt;
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skel = test_build_id__open_and_load();
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if (!ASSERT_OK_PTR(skel, "skel_open"))
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return;
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skel->links.uprobe_sleepable = bpf_program__attach(skel->progs.uprobe_sleepable);
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if (!ASSERT_OK_PTR(skel->links.uprobe_sleepable, "link"))
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goto cleanup;
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/* force build ID to not be paged in */
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ASSERT_OK(system("./uprobe_multi uprobe-paged-out"), "trigger_uprobe");
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if (!ASSERT_GT(skel->bss->res_sleepable, 0, "res"))
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goto cleanup;
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stack = skel->bss->stack_sleepable;
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frame_cnt = skel->bss->res_sleepable / sizeof(struct bpf_stack_build_id);
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if (env.verbosity >= VERBOSE_NORMAL)
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print_stack(stack, frame_cnt);
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ASSERT_EQ(stack[0].status, BPF_STACK_BUILD_ID_VALID, "build_id_status");
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ASSERT_EQ(memcmp(stack[0].build_id, build_id, build_id_sz), 0, "build_id_match");
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cleanup:
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test_build_id__destroy(skel);
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}
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void serial_test_build_id(void)
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{
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build_id_sz = read_build_id("uprobe_multi", build_id, sizeof(build_id));
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ASSERT_EQ(build_id_sz, BPF_BUILD_ID_SIZE, "parse_build_id");
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if (test__start_subtest("nofault-paged-out"))
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subtest_nofault(false /* not resident */);
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if (test__start_subtest("nofault-paged-in"))
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subtest_nofault(true /* resident */);
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if (test__start_subtest("sleepable"))
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subtest_sleepable();
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}
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