1
2
3
4
5
6#include <stdio.h>
7#include <stdlib.h>
8#include <string.h>
9#include <stdbool.h>
10
11
12
13
14#include <linux/perf_event.h>
15#include <linux/types.h>
16
17
18enum {
19 PERF_DLFILTER_FLAG_BRANCH = 1ULL << 0,
20 PERF_DLFILTER_FLAG_CALL = 1ULL << 1,
21 PERF_DLFILTER_FLAG_RETURN = 1ULL << 2,
22 PERF_DLFILTER_FLAG_CONDITIONAL = 1ULL << 3,
23 PERF_DLFILTER_FLAG_SYSCALLRET = 1ULL << 4,
24 PERF_DLFILTER_FLAG_ASYNC = 1ULL << 5,
25 PERF_DLFILTER_FLAG_INTERRUPT = 1ULL << 6,
26 PERF_DLFILTER_FLAG_TX_ABORT = 1ULL << 7,
27 PERF_DLFILTER_FLAG_TRACE_BEGIN = 1ULL << 8,
28 PERF_DLFILTER_FLAG_TRACE_END = 1ULL << 9,
29 PERF_DLFILTER_FLAG_IN_TX = 1ULL << 10,
30 PERF_DLFILTER_FLAG_VMENTRY = 1ULL << 11,
31 PERF_DLFILTER_FLAG_VMEXIT = 1ULL << 12,
32};
33
34
35
36
37struct perf_dlfilter_sample {
38 __u32 size;
39 __u16 ins_lat;
40 __u16 p_stage_cyc;
41 __u64 ip;
42 __s32 pid;
43 __s32 tid;
44 __u64 time;
45 __u64 addr;
46 __u64 id;
47 __u64 stream_id;
48 __u64 period;
49 __u64 weight;
50 __u64 transaction;
51 __u64 insn_cnt;
52 __u64 cyc_cnt;
53 __s32 cpu;
54 __u32 flags;
55 __u64 data_src;
56 __u64 phys_addr;
57 __u64 data_page_size;
58 __u64 code_page_size;
59 __u64 cgroup;
60 __u8 cpumode;
61 __u8 addr_correlates_sym;
62 __u16 misc;
63 __u32 raw_size;
64 const void *raw_data;
65 __u64 brstack_nr;
66 const struct perf_branch_entry *brstack;
67 __u64 raw_callchain_nr;
68 const __u64 *raw_callchain;
69 const char *event;
70};
71
72
73
74
75struct perf_dlfilter_al {
76 __u32 size;
77 __u32 symoff;
78 const char *sym;
79 __u64 addr;
80 __u64 sym_start;
81 __u64 sym_end;
82 const char *dso;
83 __u8 sym_binding;
84 __u8 is_64_bit;
85 __u8 is_kernel_ip;
86 __u32 buildid_size;
87 __u8 *buildid;
88
89 __u8 filtered;
90 const char *comm;
91};
92
93struct perf_dlfilter_fns {
94
95 const struct perf_dlfilter_al *(*resolve_ip)(void *ctx);
96
97 const struct perf_dlfilter_al *(*resolve_addr)(void *ctx);
98
99 char **(*args)(void *ctx, int *dlargc);
100
101
102
103
104 __s32 (*resolve_address)(void *ctx, __u64 address, struct perf_dlfilter_al *al);
105
106 const __u8 *(*insn)(void *ctx, __u32 *length);
107
108 const char *(*srcline)(void *ctx, __u32 *line_number);
109
110 struct perf_event_attr *(*attr)(void *ctx);
111
112 __s32 (*object_code)(void *ctx, __u64 ip, void *buf, __u32 len);
113
114 void *(*reserved[120])(void *);
115};
116
117struct perf_dlfilter_fns perf_dlfilter_fns;
118
119static int verbose;
120
121#define pr_debug(fmt, ...) do { \
122 if (verbose) \
123 fprintf(stderr, fmt, ##__VA_ARGS__); \
124 } while (0)
125
126static int test_fail(const char *msg)
127{
128 pr_debug("%s\n", msg);
129 return -1;
130}
131
132#define CHECK(x) do { \
133 if (!(x)) \
134 return test_fail("Check '" #x "' failed\n"); \
135 } while (0)
136
137struct filter_data {
138 __u64 ip;
139 __u64 addr;
140 int do_early;
141 int early_filter_cnt;
142 int filter_cnt;
143};
144
145static struct filter_data *filt_dat;
146
147int start(void **data, void *ctx)
148{
149 int dlargc;
150 char **dlargv;
151 struct filter_data *d;
152 static bool called;
153
154 verbose = 1;
155
156 CHECK(!filt_dat && !called);
157 called = true;
158
159 d = calloc(1, sizeof(*d));
160 if (!d)
161 test_fail("Failed to allocate memory");
162 filt_dat = d;
163 *data = d;
164
165 dlargv = perf_dlfilter_fns.args(ctx, &dlargc);
166
167 CHECK(dlargc == 6);
168 CHECK(!strcmp(dlargv[0], "first"));
169 verbose = strtol(dlargv[1], NULL, 0);
170 d->ip = strtoull(dlargv[2], NULL, 0);
171 d->addr = strtoull(dlargv[3], NULL, 0);
172 d->do_early = strtol(dlargv[4], NULL, 0);
173 CHECK(!strcmp(dlargv[5], "last"));
174
175 pr_debug("%s API\n", __func__);
176
177 return 0;
178}
179
180#define CHECK_SAMPLE(x) do { \
181 if (sample->x != expected.x) \
182 return test_fail("'" #x "' not expected value\n"); \
183 } while (0)
184
185static int check_sample(struct filter_data *d, const struct perf_dlfilter_sample *sample)
186{
187 struct perf_dlfilter_sample expected = {
188 .ip = d->ip,
189 .pid = 12345,
190 .tid = 12346,
191 .time = 1234567890,
192 .addr = d->addr,
193 .id = 99,
194 .stream_id = 101,
195 .period = 543212345,
196 .cpu = 31,
197 .cpumode = PERF_RECORD_MISC_USER,
198 .addr_correlates_sym = 1,
199 .misc = PERF_RECORD_MISC_USER,
200 };
201
202 CHECK(sample->size >= sizeof(struct perf_dlfilter_sample));
203
204 CHECK_SAMPLE(ip);
205 CHECK_SAMPLE(pid);
206 CHECK_SAMPLE(tid);
207 CHECK_SAMPLE(time);
208 CHECK_SAMPLE(addr);
209 CHECK_SAMPLE(id);
210 CHECK_SAMPLE(stream_id);
211 CHECK_SAMPLE(period);
212 CHECK_SAMPLE(cpu);
213 CHECK_SAMPLE(cpumode);
214 CHECK_SAMPLE(addr_correlates_sym);
215 CHECK_SAMPLE(misc);
216
217 CHECK(!sample->raw_data);
218 CHECK_SAMPLE(brstack_nr);
219 CHECK(!sample->brstack);
220 CHECK_SAMPLE(raw_callchain_nr);
221 CHECK(!sample->raw_callchain);
222
223#define EVENT_NAME "branches:"
224 CHECK(!strncmp(sample->event, EVENT_NAME, strlen(EVENT_NAME)));
225
226 return 0;
227}
228
229static int check_al(void *ctx)
230{
231 const struct perf_dlfilter_al *al;
232
233 al = perf_dlfilter_fns.resolve_ip(ctx);
234 if (!al)
235 return test_fail("resolve_ip() failed");
236
237 CHECK(al->sym && !strcmp("foo", al->sym));
238 CHECK(!al->symoff);
239
240 return 0;
241}
242
243static int check_addr_al(void *ctx)
244{
245 const struct perf_dlfilter_al *addr_al;
246
247 addr_al = perf_dlfilter_fns.resolve_addr(ctx);
248 if (!addr_al)
249 return test_fail("resolve_addr() failed");
250
251 CHECK(addr_al->sym && !strcmp("bar", addr_al->sym));
252 CHECK(!addr_al->symoff);
253
254 return 0;
255}
256
257static int check_attr(void *ctx)
258{
259 struct perf_event_attr *attr = perf_dlfilter_fns.attr(ctx);
260
261 CHECK(attr);
262 CHECK(attr->type == PERF_TYPE_HARDWARE);
263 CHECK(attr->config == PERF_COUNT_HW_BRANCH_INSTRUCTIONS);
264
265 return 0;
266}
267
268static int do_checks(void *data, const struct perf_dlfilter_sample *sample, void *ctx, bool early)
269{
270 struct filter_data *d = data;
271
272 CHECK(data && filt_dat == data);
273
274 if (early) {
275 CHECK(!d->early_filter_cnt);
276 d->early_filter_cnt += 1;
277 } else {
278 CHECK(!d->filter_cnt);
279 CHECK(d->early_filter_cnt);
280 CHECK(d->do_early != 2);
281 d->filter_cnt += 1;
282 }
283
284 if (check_sample(data, sample))
285 return -1;
286
287 if (check_attr(ctx))
288 return -1;
289
290 if (early && !d->do_early)
291 return 0;
292
293 if (check_al(ctx) || check_addr_al(ctx))
294 return -1;
295
296 if (early)
297 return d->do_early == 2;
298
299 return 1;
300}
301
302int filter_event_early(void *data, const struct perf_dlfilter_sample *sample, void *ctx)
303{
304 pr_debug("%s API\n", __func__);
305
306 return do_checks(data, sample, ctx, true);
307}
308
309int filter_event(void *data, const struct perf_dlfilter_sample *sample, void *ctx)
310{
311 struct filter_data *d = data;
312
313 pr_debug("%s API\n", __func__);
314
315 return do_checks(data, sample, ctx, false);
316}
317
318int stop(void *data, void *ctx)
319{
320 static bool called;
321
322 pr_debug("%s API\n", __func__);
323
324 CHECK(data && filt_dat == data && !called);
325 called = true;
326
327 free(data);
328 filt_dat = NULL;
329 return 0;
330}
331
332const char *filter_description(const char **long_description)
333{
334 *long_description = "Filter used by the 'dlfilter C API' perf test";
335 return "dlfilter to test v0 C API";
336}
337
