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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | // SPDX-License-Identifier: GPL-2.0 /* * User Events Dyn Events Test Program * * Copyright (c) 2021 Beau Belgrave <beaub@linux.microsoft.com> */ #include <errno.h> #include <linux/user_events.h> #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/stat.h> #include <unistd.h> #include "../kselftest_harness.h" const char *dyn_file = "/sys/kernel/debug/tracing/dynamic_events"; const char *clear = "!u:__test_event"; static int Append(const char *value) { int fd = open(dyn_file, O_RDWR | O_APPEND); int ret = write(fd, value, strlen(value)); close(fd); return ret; } #define CLEAR() \ do { \ int ret = Append(clear); \ if (ret == -1) \ ASSERT_EQ(ENOENT, errno); \ } while (0) #define TEST_PARSE(x) \ do { \ ASSERT_NE(-1, Append(x)); \ CLEAR(); \ } while (0) #define TEST_NPARSE(x) ASSERT_EQ(-1, Append(x)) FIXTURE(user) { }; FIXTURE_SETUP(user) { CLEAR(); } FIXTURE_TEARDOWN(user) { CLEAR(); } TEST_F(user, basic_types) { /* All should work */ TEST_PARSE("u:__test_event u64 a"); TEST_PARSE("u:__test_event u32 a"); TEST_PARSE("u:__test_event u16 a"); TEST_PARSE("u:__test_event u8 a"); TEST_PARSE("u:__test_event char a"); TEST_PARSE("u:__test_event unsigned char a"); TEST_PARSE("u:__test_event int a"); TEST_PARSE("u:__test_event unsigned int a"); TEST_PARSE("u:__test_event short a"); TEST_PARSE("u:__test_event unsigned short a"); TEST_PARSE("u:__test_event char[20] a"); TEST_PARSE("u:__test_event unsigned char[20] a"); TEST_PARSE("u:__test_event char[0x14] a"); TEST_PARSE("u:__test_event unsigned char[0x14] a"); /* Bad size format should fail */ TEST_NPARSE("u:__test_event char[aa] a"); /* Large size should fail */ TEST_NPARSE("u:__test_event char[9999] a"); /* Long size string should fail */ TEST_NPARSE("u:__test_event char[0x0000000000001] a"); } TEST_F(user, loc_types) { /* All should work */ TEST_PARSE("u:__test_event __data_loc char[] a"); TEST_PARSE("u:__test_event __data_loc unsigned char[] a"); TEST_PARSE("u:__test_event __rel_loc char[] a"); TEST_PARSE("u:__test_event __rel_loc unsigned char[] a"); } TEST_F(user, size_types) { /* Should work */ TEST_PARSE("u:__test_event struct custom a 20"); /* Size not specified on struct should fail */ TEST_NPARSE("u:__test_event struct custom a"); /* Size specified on non-struct should fail */ TEST_NPARSE("u:__test_event char a 20"); } TEST_F(user, flags) { /* Should work */ TEST_PARSE("u:__test_event:BPF_ITER u32 a"); /* Forward compat */ TEST_PARSE("u:__test_event:BPF_ITER,FLAG_FUTURE u32 a"); } TEST_F(user, matching) { /* Register */ ASSERT_NE(-1, Append("u:__test_event struct custom a 20")); /* Should not match */ TEST_NPARSE("!u:__test_event struct custom b"); /* Should match */ TEST_PARSE("!u:__test_event struct custom a"); /* Multi field reg */ ASSERT_NE(-1, Append("u:__test_event u32 a; u32 b")); /* Non matching cases */ TEST_NPARSE("!u:__test_event u32 a"); TEST_NPARSE("!u:__test_event u32 b"); TEST_NPARSE("!u:__test_event u32 a; u32 "); TEST_NPARSE("!u:__test_event u32 a; u32 a"); /* Matching case */ TEST_PARSE("!u:__test_event u32 a; u32 b"); /* Register */ ASSERT_NE(-1, Append("u:__test_event u32 a; u32 b")); /* Ensure trailing semi-colon case */ TEST_PARSE("!u:__test_event u32 a; u32 b;"); } int main(int argc, char **argv) { return test_harness_run(argc, argv); } |