| 1 | #include <stdio.h> |
| 2 | #include <unistd.h> |
| 3 | #include <sys/mman.h> |
| 4 | |
| 5 | #include "../libmarkers/marker.h" |
| 6 | #include "usterr.h" |
| 7 | #include "tracer.h" |
| 8 | |
| 9 | void probe(const struct marker *mdata, |
| 10 | void *probe_private, void *call_private, |
| 11 | const char *fmt, va_list *args) |
| 12 | { |
| 13 | printf("In probe\n"); |
| 14 | } |
| 15 | |
| 16 | //ust// void try_map() |
| 17 | //ust// { |
| 18 | //ust// char *m; |
| 19 | //ust// |
| 20 | //ust// /* maybe add MAP_LOCKED */ |
| 21 | //ust// m = mmap(NULL, 4096, PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE , -1, 0); |
| 22 | //ust// if(m == (char*)-1) { |
| 23 | //ust// perror("mmap"); |
| 24 | //ust// return; |
| 25 | //ust// } |
| 26 | //ust// |
| 27 | //ust// printf("The mapping is at %p.\n", m); |
| 28 | //ust// strcpy(m, "Hello, Mapping!"); |
| 29 | //ust// } |
| 30 | |
| 31 | //sig_atomic_t must_quit; |
| 32 | |
| 33 | void inthandler(int sig) |
| 34 | { |
| 35 | printf("in handler\n"); |
| 36 | exit(0); |
| 37 | } |
| 38 | |
| 39 | int init_int_handler(void) |
| 40 | { |
| 41 | int result; |
| 42 | struct sigaction act; |
| 43 | |
| 44 | result = sigemptyset(&act.sa_mask); |
| 45 | if(result == -1) { |
| 46 | PERROR("sigemptyset"); |
| 47 | return -1; |
| 48 | } |
| 49 | |
| 50 | act.sa_handler = inthandler; |
| 51 | act.sa_flags = SA_RESTART; |
| 52 | |
| 53 | /* Only defer ourselves. Also, try to restart interrupted |
| 54 | * syscalls to disturb the traced program as little as possible. |
| 55 | */ |
| 56 | result = sigaction(SIGINT, &act, NULL); |
| 57 | if(result == -1) { |
| 58 | PERROR("sigaction"); |
| 59 | return -1; |
| 60 | } |
| 61 | |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | DEFINE_MUTEX(probes_mutex); |
| 66 | |
| 67 | static LIST_HEAD(probes_registered_list); |
| 68 | |
| 69 | int ltt_marker_connect(const char *channel, const char *mname, |
| 70 | const char *pname) |
| 71 | |
| 72 | { |
| 73 | int ret; |
| 74 | struct ltt_active_marker *pdata; |
| 75 | struct ltt_available_probe *probe; |
| 76 | |
| 77 | ltt_lock_traces(); |
| 78 | mutex_lock(&probes_mutex); |
| 79 | probe = get_probe_from_name(pname); |
| 80 | if (!probe) { |
| 81 | ret = -ENOENT; |
| 82 | goto end; |
| 83 | } |
| 84 | pdata = marker_get_private_data(channel, mname, probe->probe_func, 0); |
| 85 | if (pdata && !IS_ERR(pdata)) { |
| 86 | ret = -EEXIST; |
| 87 | goto end; |
| 88 | } |
| 89 | pdata = kmem_cache_zalloc(markers_loaded_cachep, GFP_KERNEL); |
| 90 | if (!pdata) { |
| 91 | ret = -ENOMEM; |
| 92 | goto end; |
| 93 | } |
| 94 | pdata->probe = probe; |
| 95 | /* |
| 96 | * ID has priority over channel in case of conflict. |
| 97 | */ |
| 98 | ret = marker_probe_register(channel, mname, NULL, |
| 99 | probe->probe_func, pdata); |
| 100 | if (ret) |
| 101 | kmem_cache_free(markers_loaded_cachep, pdata); |
| 102 | else |
| 103 | list_add(&pdata->node, &markers_loaded_list); |
| 104 | end: |
| 105 | mutex_unlock(&probes_mutex); |
| 106 | ltt_unlock_traces(); |
| 107 | return ret; |
| 108 | } |
| 109 | |
| 110 | |
| 111 | int ltt_probe_register(struct ltt_available_probe *pdata) |
| 112 | { |
| 113 | int ret = 0; |
| 114 | int comparison; |
| 115 | struct ltt_available_probe *iter; |
| 116 | |
| 117 | mutex_lock(&probes_mutex); |
| 118 | list_for_each_entry_reverse(iter, &probes_registered_list, node) { |
| 119 | comparison = strcmp(pdata->name, iter->name); |
| 120 | if (!comparison) { |
| 121 | ret = -EBUSY; |
| 122 | goto end; |
| 123 | } else if (comparison > 0) { |
| 124 | /* We belong to the location right after iter. */ |
| 125 | list_add(&pdata->node, &iter->node); |
| 126 | goto end; |
| 127 | } |
| 128 | } |
| 129 | /* Should be added at the head of the list */ |
| 130 | list_add(&pdata->node, &probes_registered_list); |
| 131 | end: |
| 132 | mutex_unlock(&probes_mutex); |
| 133 | return ret; |
| 134 | } |
| 135 | |
| 136 | |
| 137 | struct ltt_available_probe default_probe = { |
| 138 | .name = "default", |
| 139 | .format = NULL, |
| 140 | .probe_func = ltt_vtrace, |
| 141 | .callbacks[0] = ltt_serialize_data, |
| 142 | }; |
| 143 | |
| 144 | int main() |
| 145 | { |
| 146 | int result; |
| 147 | |
| 148 | init_int_handler(); |
| 149 | |
| 150 | init_ustrelay_transport(); |
| 151 | |
| 152 | printf("page size is %d\n", sysconf(_SC_PAGE_SIZE)); |
| 153 | |
| 154 | char trace_name[] = "theusttrace"; |
| 155 | char trace_type[] = "ustrelay"; |
| 156 | |
| 157 | marker_probe_register("abc", "testmark", "", probe, NULL); |
| 158 | marker_probe_register("metadata", "core_marker_id", "channel %s name %s event_id %hu int #1u%zu long #1u%zu pointer #1u%zu size_t #1u%zu alignment #1u%u", probe, NULL); |
| 159 | result = ltt_probe_register(&default_probe); |
| 160 | if(result) |
| 161 | ERR("ltt_probe_register"); |
| 162 | |
| 163 | result = ltt_marker_connect("abc", "testmark2", "default"); |
| 164 | if(result) |
| 165 | ERR("ltt_marker_connect"); |
| 166 | |
| 167 | |
| 168 | result = ltt_trace_setup(trace_name); |
| 169 | if(result < 0) { |
| 170 | ERR("ltt_trace_setup failed"); |
| 171 | return 1; |
| 172 | } |
| 173 | |
| 174 | result = ltt_trace_set_type(trace_name, trace_type); |
| 175 | if(result < 0) { |
| 176 | ERR("ltt_trace_set_type failed"); |
| 177 | return 1; |
| 178 | } |
| 179 | |
| 180 | result = ltt_trace_alloc(trace_name); |
| 181 | if(result < 0) { |
| 182 | ERR("ltt_trace_alloc failed"); |
| 183 | return 1; |
| 184 | } |
| 185 | |
| 186 | result = ltt_trace_start(trace_name); |
| 187 | if(result < 0) { |
| 188 | ERR("ltt_trace_start failed"); |
| 189 | return 1; |
| 190 | } |
| 191 | |
| 192 | |
| 193 | printf("Hello, World!\n"); |
| 194 | |
| 195 | for(;;) { |
| 196 | trace_mark(abc, testmark, "", MARK_NOARGS); |
| 197 | trace_mark(abc, testmark2, "", MARK_NOARGS); |
| 198 | sleep(1); |
| 199 | } |
| 200 | |
| 201 | scanf("%*s"); |
| 202 | |
| 203 | return 0; |
| 204 | } |