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pmcstat_log.c (153710) pmcstat_log.c (157144)
1/*-
1/*-
2 * Copyright (c) 2005, Joseph Koshy
2 * Copyright (c) 2005-2006, Joseph Koshy
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright

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19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright

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19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/usr.sbin/pmcstat/pmcstat_log.c 153710 2005-12-25 05:11:29Z jkoshy $");
29
30/*
27/*
31 * Transform a hwpmc(4) log into human readable form and into gprof(1)
32 * compatible profiles.
33 *
34 * Each executable object encountered in the log gets one 'gmon.out'
35 * profile per PMC. We currently track:
36 * - program executables
37 * - shared libraries loaded by the runtime loader
38 * - the runtime loader itself
39 * - the kernel.
40 * We do not track shared objects mapped in by dlopen() yet (this
41 * needs additional support from hwpmc(4)).
42 *
43 * 'gmon.out' profiles generated for a given sampling PMC are
44 * aggregates of all the samples for that particular executable
45 * object.
28 * Transform a hwpmc(4) log into human readable form, and into
29 * gprof(1) compatible profiles.
46 */
47
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: head/usr.sbin/pmcstat/pmcstat_log.c 157144 2006-03-26 12:20:54Z jkoshy $");
34
48#include <sys/param.h>
49#include <sys/endian.h>
50#include <sys/gmon.h>
51#include <sys/imgact_aout.h>
52#include <sys/imgact_elf.h>
53#include <sys/mman.h>
54#include <sys/pmc.h>
55#include <sys/queue.h>

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73#include <unistd.h>
74
75#include "pmcstat.h"
76
77#define min(A,B) ((A) < (B) ? (A) : (B))
78#define max(A,B) ((A) > (B) ? (A) : (B))
79
80/*
35#include <sys/param.h>
36#include <sys/endian.h>
37#include <sys/gmon.h>
38#include <sys/imgact_aout.h>
39#include <sys/imgact_elf.h>
40#include <sys/mman.h>
41#include <sys/pmc.h>
42#include <sys/queue.h>

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60#include <unistd.h>
61
62#include "pmcstat.h"
63
64#define min(A,B) ((A) < (B) ? (A) : (B))
65#define max(A,B) ((A) > (B) ? (A) : (B))
66
67/*
81 * A simple implementation of interned strings. Each interned string
82 * is assigned a unique address, so that subsequent string compares
83 * can be done by a simple pointer comparision instead of with
84 * strcmp().
68 * PUBLIC INTERFACES
69 *
70 * pmcstat_initialize_logging() initialize this module, called first
71 * pmcstat_shutdown_logging() orderly shutdown, called last
72 * pmcstat_open_log() open an eventlog for processing
73 * pmcstat_process_log() print/convert an event log
74 * pmcstat_close_log() finish processing an event log
75 *
76 * IMPLEMENTATION OF GMON OUTPUT
77 *
78 * We correlate each 'sample' seen in the event log back to an
79 * executable object in the system. Executable objects include:
80 * - program executables,
81 * - shared libraries loaded by the runtime loader,
82 * - dlopen()'ed objects loaded by the program,
83 * - the runtime loader itself,
84 * - the kernel and kernel modules.
85 *
86 * Each such executable object gets one 'gmon.out' profile, per PMC in
87 * use. Creation of 'gmon.out' profiles is done lazily. The
88 * 'gmon.out' profiles generated for a given sampling PMC are
89 * aggregates of all the samples for that particular executable
90 * object.
91 *
92 * Each process that we know about is treated as a set of regions that
93 * map to executable objects. Processes are described by
94 * 'pmcstat_process' structures. Executable objects are tracked by
95 * 'pmcstat_image' structures. The kernel and kernel modules are
96 * common to all processes (they reside at the same virtual addresses
97 * for all processes). Individual processes can have their text
98 * segments and shared libraries loaded at process-specific locations.
99 *
100 * A given executable object can be in use by multiple processes
101 * (e.g., libc.so) and loaded at a different address in each.
102 * pmcstat_pcmap structures track per-image mappings.
103 *
104 * The sample log could have samples from multiple PMCs; we
105 * generate one 'gmon.out' profile per PMC.
85 */
106 */
86struct pmcstat_string {
87 LIST_ENTRY(pmcstat_string) ps_next; /* hash link */
88 int ps_len;
89 int ps_hash;
90 const char *ps_string;
91};
92
107
93static LIST_HEAD(,pmcstat_string) pmcstat_string_hash[PMCSTAT_NHASH];
108typedef const void *pmcstat_interned_string;
94
95/*
96 * 'pmcstat_pmcrecord' is a mapping from PMC ids to human-readable
97 * names.
98 */
99
100struct pmcstat_pmcrecord {
101 LIST_ENTRY(pmcstat_pmcrecord) pr_next;
109
110/*
111 * 'pmcstat_pmcrecord' is a mapping from PMC ids to human-readable
112 * names.
113 */
114
115struct pmcstat_pmcrecord {
116 LIST_ENTRY(pmcstat_pmcrecord) pr_next;
102 pmc_id_t pr_pmcid;
103 const char *pr_pmcname;
117 pmc_id_t pr_pmcid;
118 pmcstat_interned_string pr_pmcname;
104};
105
106static LIST_HEAD(,pmcstat_pmcrecord) pmcstat_pmcs =
107 LIST_HEAD_INITIALIZER(&pmcstat_pmcs);
108
109
110/*
111 * struct pmcstat_gmonfile tracks a given 'gmon.out' file. These
112 * files are mmap()'ed in as needed.
113 */
114
115struct pmcstat_gmonfile {
116 LIST_ENTRY(pmcstat_gmonfile) pgf_next; /* list of entries */
119};
120
121static LIST_HEAD(,pmcstat_pmcrecord) pmcstat_pmcs =
122 LIST_HEAD_INITIALIZER(&pmcstat_pmcs);
123
124
125/*
126 * struct pmcstat_gmonfile tracks a given 'gmon.out' file. These
127 * files are mmap()'ed in as needed.
128 */
129
130struct pmcstat_gmonfile {
131 LIST_ENTRY(pmcstat_gmonfile) pgf_next; /* list of entries */
132 int pgf_overflow; /* whether a count overflowed */
117 pmc_id_t pgf_pmcid; /* id of the associated pmc */
118 size_t pgf_nbuckets; /* #buckets in this gmon.out */
133 pmc_id_t pgf_pmcid; /* id of the associated pmc */
134 size_t pgf_nbuckets; /* #buckets in this gmon.out */
119 const char *pgf_name; /* pathname of gmon.out file */
135 pmcstat_interned_string pgf_name; /* pathname of gmon.out file */
120 size_t pgf_ndatabytes; /* number of bytes mapped */
121 void *pgf_gmondata; /* pointer to mmap'ed data */
122};
123
136 size_t pgf_ndatabytes; /* number of bytes mapped */
137 void *pgf_gmondata; /* pointer to mmap'ed data */
138};
139
124static TAILQ_HEAD(,pmcstat_gmonfile) pmcstat_gmonfiles =
125 TAILQ_HEAD_INITIALIZER(pmcstat_gmonfiles);
126
127/*
128 * A 'pmcstat_image' structure describes an executable program on
140/*
141 * A 'pmcstat_image' structure describes an executable program on
129 * disk. 'pi_internedpath' is a cookie representing the pathname of
142 * disk. 'pi_execpath' is a cookie representing the pathname of
130 * the executable. 'pi_start' and 'pi_end' are the least and greatest
131 * virtual addresses for the text segments in the executable.
132 * 'pi_gmonlist' contains a linked list of gmon.out files associated
133 * with this image.
134 */
135
136enum pmcstat_image_type {
143 * the executable. 'pi_start' and 'pi_end' are the least and greatest
144 * virtual addresses for the text segments in the executable.
145 * 'pi_gmonlist' contains a linked list of gmon.out files associated
146 * with this image.
147 */
148
149enum pmcstat_image_type {
137 PMCSTAT_IMAGE_UNKNOWN = 0,
138 PMCSTAT_IMAGE_ELF,
139 PMCSTAT_IMAGE_AOUT
150 PMCSTAT_IMAGE_UNKNOWN = 0, /* never looked at the image */
151 PMCSTAT_IMAGE_INDETERMINABLE, /* can't tell what the image is */
152 PMCSTAT_IMAGE_ELF32, /* ELF 32 bit object */
153 PMCSTAT_IMAGE_ELF64, /* ELF 64 bit object */
154 PMCSTAT_IMAGE_AOUT /* AOUT object */
140};
141
142struct pmcstat_image {
143 LIST_ENTRY(pmcstat_image) pi_next; /* hash link */
144 TAILQ_ENTRY(pmcstat_image) pi_lru; /* LRU list */
155};
156
157struct pmcstat_image {
158 LIST_ENTRY(pmcstat_image) pi_next; /* hash link */
159 TAILQ_ENTRY(pmcstat_image) pi_lru; /* LRU list */
145 const char *pi_internedpath; /* cookie */
146 const char *pi_samplename; /* sample path name */
160 pmcstat_interned_string pi_execpath;/* cookie */
161 pmcstat_interned_string pi_samplename; /* sample path name */
147
148 enum pmcstat_image_type pi_type; /* executable type */
162
163 enum pmcstat_image_type pi_type; /* executable type */
164
165 /*
166 * Executables have pi_start and pi_end; these are zero
167 * for shared libraries.
168 */
149 uintfptr_t pi_start; /* start address (inclusive) */
150 uintfptr_t pi_end; /* end address (exclusive) */
151 uintfptr_t pi_entry; /* entry address */
169 uintfptr_t pi_start; /* start address (inclusive) */
170 uintfptr_t pi_end; /* end address (exclusive) */
171 uintfptr_t pi_entry; /* entry address */
152 int pi_isdynamic; /* whether a dynamic object */
153 const char *pi_dynlinkerpath; /* path in .interp section */
172 uintfptr_t pi_vaddr; /* virtual address where loaded */
173 int pi_isdynamic; /* whether a dynamic
174 * object */
175 int pi_iskernelmodule;
176 pmcstat_interned_string pi_dynlinkerpath; /* path in .interp */
154
177
178 /*
179 * An image can be associated with one or more gmon.out files;
180 * one per PMC.
181 */
155 LIST_HEAD(,pmcstat_gmonfile) pi_gmlist;
156};
157
182 LIST_HEAD(,pmcstat_gmonfile) pi_gmlist;
183};
184
185/*
186 * All image descriptors are kept in a hash table.
187 */
158static LIST_HEAD(,pmcstat_image) pmcstat_image_hash[PMCSTAT_NHASH];
159static TAILQ_HEAD(,pmcstat_image) pmcstat_image_lru =
160 TAILQ_HEAD_INITIALIZER(pmcstat_image_lru);
161
188static LIST_HEAD(,pmcstat_image) pmcstat_image_hash[PMCSTAT_NHASH];
189static TAILQ_HEAD(,pmcstat_image) pmcstat_image_lru =
190 TAILQ_HEAD_INITIALIZER(pmcstat_image_lru);
191
192/*
193 * A 'pmcstat_pcmap' structure maps a virtual address range to an
194 * underlying 'pmcstat_image' descriptor.
195 */
162struct pmcstat_pcmap {
163 TAILQ_ENTRY(pmcstat_pcmap) ppm_next;
164 uintfptr_t ppm_lowpc;
165 uintfptr_t ppm_highpc;
166 struct pmcstat_image *ppm_image;
167};
168
169/*
196struct pmcstat_pcmap {
197 TAILQ_ENTRY(pmcstat_pcmap) ppm_next;
198 uintfptr_t ppm_lowpc;
199 uintfptr_t ppm_highpc;
200 struct pmcstat_image *ppm_image;
201};
202
203/*
170 * A 'pmcstat_process' structure tracks processes.
204 * A 'pmcstat_process' structure models processes. Each process is
205 * associated with a set of pmcstat_pcmap structures that map
206 * addresses inside it to executable objects. This set is implemented
207 * as a list, kept sorted in ascending order of mapped addresses.
208 *
209 * 'pp_pid' holds the pid of the process. When a process exits, the
210 * 'pp_isactive' field is set to zero, but the process structure is
211 * not immediately reclaimed because there may still be samples in the
212 * log for this process.
171 */
172
173struct pmcstat_process {
174 LIST_ENTRY(pmcstat_process) pp_next; /* hash-next */
175 pid_t pp_pid; /* associated pid */
176 int pp_isactive; /* whether active */
177 uintfptr_t pp_entryaddr; /* entry address */
178 TAILQ_HEAD(,pmcstat_pcmap) pp_map; /* address range map */
179};
180
213 */
214
215struct pmcstat_process {
216 LIST_ENTRY(pmcstat_process) pp_next; /* hash-next */
217 pid_t pp_pid; /* associated pid */
218 int pp_isactive; /* whether active */
219 uintfptr_t pp_entryaddr; /* entry address */
220 TAILQ_HEAD(,pmcstat_pcmap) pp_map; /* address range map */
221};
222
223#define PMCSTAT_ALLOCATE 1
224
225/*
226 * All process descriptors are kept in a hash table.
227 */
181static LIST_HEAD(,pmcstat_process) pmcstat_process_hash[PMCSTAT_NHASH];
182
183static struct pmcstat_process *pmcstat_kernproc; /* kernel 'process' */
184
228static LIST_HEAD(,pmcstat_process) pmcstat_process_hash[PMCSTAT_NHASH];
229
230static struct pmcstat_process *pmcstat_kernproc; /* kernel 'process' */
231
232/* Misc. statistics */
233static struct pmcstat_stats {
234 int ps_exec_aout; /* # a.out executables seen */
235 int ps_exec_elf; /* # elf executables seen */
236 int ps_exec_errors; /* # errors processing executables */
237 int ps_exec_indeterminable; /* # unknown executables seen */
238 int ps_samples_total; /* total number of samples processed */
239 int ps_samples_unknown_offset; /* #samples not in any map */
240 int ps_samples_indeterminable; /* #samples in indeterminable images */
241} pmcstat_stats;
242
185/*
186 * Prototypes
187 */
188
189static void pmcstat_gmon_create_file(struct pmcstat_gmonfile *_pgf,
190 struct pmcstat_image *_image);
243/*
244 * Prototypes
245 */
246
247static void pmcstat_gmon_create_file(struct pmcstat_gmonfile *_pgf,
248 struct pmcstat_image *_image);
191static const char *pmcstat_gmon_create_name(const char *_sd,
249static pmcstat_interned_string pmcstat_gmon_create_name(const char *_sd,
192 struct pmcstat_image *_img, pmc_id_t _pmcid);
193static void pmcstat_gmon_map_file(struct pmcstat_gmonfile *_pgf);
194static void pmcstat_gmon_unmap_file(struct pmcstat_gmonfile *_pgf);
195
250 struct pmcstat_image *_img, pmc_id_t _pmcid);
251static void pmcstat_gmon_map_file(struct pmcstat_gmonfile *_pgf);
252static void pmcstat_gmon_unmap_file(struct pmcstat_gmonfile *_pgf);
253
196static struct pmcstat_image *pmcstat_image_from_path(const char *_path);
197static enum pmcstat_image_type pmcstat_image_get_type(const char *_p);
198static void pmcstat_image_get_elf_params(struct pmcstat_image *_image);
254static void pmcstat_image_determine_type(struct pmcstat_image *_image,
255 struct pmcstat_args *_a);
256static struct pmcstat_image *pmcstat_image_from_path(pmcstat_interned_string
257 _path, int _iskernelmodule);
258static void pmcstat_image_get_aout_params(struct pmcstat_image *_image,
259 struct pmcstat_args *_a);
260static void pmcstat_image_get_elf_params(struct pmcstat_image *_image,
261 struct pmcstat_args *_a);
199static void pmcstat_image_increment_bucket(struct pmcstat_pcmap *_pcm,
200 uintfptr_t _pc, pmc_id_t _pmcid, struct pmcstat_args *_a);
201static void pmcstat_image_link(struct pmcstat_process *_pp,
262static void pmcstat_image_increment_bucket(struct pmcstat_pcmap *_pcm,
263 uintfptr_t _pc, pmc_id_t _pmcid, struct pmcstat_args *_a);
264static void pmcstat_image_link(struct pmcstat_process *_pp,
202 struct pmcstat_image *_i, uintfptr_t _lpc, uintfptr_t _hpc);
265 struct pmcstat_image *_i, uintfptr_t _lpc);
203
266
204static void pmcstat_pmcid_add(pmc_id_t _pmcid, const char *_name,
205 struct pmcstat_args *_a);
267static void pmcstat_pmcid_add(pmc_id_t _pmcid,
268 pmcstat_interned_string _name, struct pmcstat_args *_a);
206static const char *pmcstat_pmcid_to_name(pmc_id_t _pmcid);
207
269static const char *pmcstat_pmcid_to_name(pmc_id_t _pmcid);
270
208static void pmcstat_process_add_elf_image(struct pmcstat_process *_pp,
209 const char *_path, uintfptr_t _entryaddr);
271static void pmcstat_process_aout_exec(struct pmcstat_process *_pp,
272 struct pmcstat_image *_image, uintfptr_t _entryaddr,
273 struct pmcstat_args *_a);
274static void pmcstat_process_elf_exec(struct pmcstat_process *_pp,
275 struct pmcstat_image *_image, uintfptr_t _entryaddr,
276 struct pmcstat_args *_a);
210static void pmcstat_process_exec(struct pmcstat_process *_pp,
277static void pmcstat_process_exec(struct pmcstat_process *_pp,
211 const char *_path, uintfptr_t _entryaddr);
212static struct pmcstat_process *pmcstat_process_lookup(pid_t _pid, int _allocate);
278 pmcstat_interned_string _path, uintfptr_t _entryaddr,
279 struct pmcstat_args *_ao);
280static struct pmcstat_process *pmcstat_process_lookup(pid_t _pid,
281 int _allocate);
213static struct pmcstat_pcmap *pmcstat_process_find_map(
214 struct pmcstat_process *_p, uintfptr_t _pc);
215
216static int pmcstat_string_compute_hash(const char *_string);
282static struct pmcstat_pcmap *pmcstat_process_find_map(
283 struct pmcstat_process *_p, uintfptr_t _pc);
284
285static int pmcstat_string_compute_hash(const char *_string);
217static const char *pmcstat_string_intern(const char *_s);
218static struct pmcstat_string *pmcstat_string_lookup(const char *_s);
286static void pmcstat_string_initialize(void);
287static pmcstat_interned_string pmcstat_string_intern(const char *_s);
288static pmcstat_interned_string pmcstat_string_lookup(const char *_s);
289static int pmcstat_string_lookup_hash(pmcstat_interned_string _is);
290static void pmcstat_string_shutdown(void);
291static const char *pmcstat_string_unintern(pmcstat_interned_string _is);
219
220
221/*
292
293
294/*
295 * A simple implementation of interned strings. Each interned string
296 * is assigned a unique address, so that subsequent string compares
297 * can be done by a simple pointer comparision instead of using
298 * strcmp(). This speeds up hash table lookups and saves memory if
299 * duplicate strings are the norm.
300 */
301struct pmcstat_string {
302 LIST_ENTRY(pmcstat_string) ps_next; /* hash link */
303 int ps_len;
304 int ps_hash;
305 char *ps_string;
306};
307
308static LIST_HEAD(,pmcstat_string) pmcstat_string_hash[PMCSTAT_NHASH];
309
310/*
311 * Compute a 'hash' value for a string.
312 */
313
314static int
315pmcstat_string_compute_hash(const char *s)
316{
317 int hash;
318
319 for (hash = 0; *s; s++)
320 hash ^= *s;
321
322 return (hash & PMCSTAT_HASH_MASK);
323}
324
325/*
326 * Intern a copy of string 's', and return a pointer to the
327 * interned structure.
328 */
329
330static pmcstat_interned_string
331pmcstat_string_intern(const char *s)
332{
333 struct pmcstat_string *ps;
334 const struct pmcstat_string *cps;
335 int hash, len;
336
337 if ((cps = pmcstat_string_lookup(s)) != NULL)
338 return (cps);
339
340 hash = pmcstat_string_compute_hash(s);
341 len = strlen(s);
342
343 if ((ps = malloc(sizeof(*ps))) == NULL)
344 err(EX_OSERR, "ERROR: Could not intern string");
345 ps->ps_len = len;
346 ps->ps_hash = hash;
347 ps->ps_string = strdup(s);
348 LIST_INSERT_HEAD(&pmcstat_string_hash[hash], ps, ps_next);
349 return ((pmcstat_interned_string) ps);
350}
351
352static const char *
353pmcstat_string_unintern(pmcstat_interned_string str)
354{
355 const char *s;
356
357 s = ((const struct pmcstat_string *) str)->ps_string;
358 return (s);
359}
360
361static pmcstat_interned_string
362pmcstat_string_lookup(const char *s)
363{
364 struct pmcstat_string *ps;
365 int hash, len;
366
367 hash = pmcstat_string_compute_hash(s);
368 len = strlen(s);
369
370 LIST_FOREACH(ps, &pmcstat_string_hash[hash], ps_next)
371 if (ps->ps_len == len && ps->ps_hash == hash &&
372 strcmp(ps->ps_string, s) == 0)
373 return (ps);
374 return (NULL);
375}
376
377static int
378pmcstat_string_lookup_hash(pmcstat_interned_string s)
379{
380 const struct pmcstat_string *ps;
381
382 ps = (const struct pmcstat_string *) s;
383 return (ps->ps_hash);
384}
385
386/*
387 * Initialize the string interning facility.
388 */
389
390static void
391pmcstat_string_initialize(void)
392{
393 int i;
394
395 for (i = 0; i < PMCSTAT_NHASH; i++)
396 LIST_INIT(&pmcstat_string_hash[i]);
397}
398
399/*
400 * Destroy the string table, free'ing up space.
401 */
402
403static void
404pmcstat_string_shutdown(void)
405{
406 int i;
407 struct pmcstat_string *ps, *pstmp;
408
409 for (i = 0; i < PMCSTAT_NHASH; i++)
410 LIST_FOREACH_SAFE(ps, &pmcstat_string_hash[i], ps_next,
411 pstmp) {
412 LIST_REMOVE(ps, ps_next);
413 free(ps->ps_string);
414 free(ps);
415 }
416}
417
418/*
222 * Create a gmon.out file and size it.
223 */
224
225static void
226pmcstat_gmon_create_file(struct pmcstat_gmonfile *pgf,
227 struct pmcstat_image *image)
228{
229 int fd;
230 size_t count;
231 struct gmonhdr gm;
419 * Create a gmon.out file and size it.
420 */
421
422static void
423pmcstat_gmon_create_file(struct pmcstat_gmonfile *pgf,
424 struct pmcstat_image *image)
425{
426 int fd;
427 size_t count;
428 struct gmonhdr gm;
429 const char *pathname;
232 char buffer[DEFAULT_BUFFER_SIZE];
233
430 char buffer[DEFAULT_BUFFER_SIZE];
431
234 if ((fd = open(pgf->pgf_name, O_RDWR|O_NOFOLLOW|O_CREAT,
432 pathname = pmcstat_string_unintern(pgf->pgf_name);
433 if ((fd = open(pathname, O_RDWR|O_NOFOLLOW|O_CREAT,
235 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
434 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
236 err(EX_OSERR, "ERROR: Cannot open \"%s\"", pgf->pgf_name);
435 err(EX_OSERR, "ERROR: Cannot open \"%s\"", pathname);
237
238 gm.lpc = image->pi_start;
239 gm.hpc = image->pi_end;
240 gm.ncnt = (pgf->pgf_nbuckets * sizeof(HISTCOUNTER)) +
241 sizeof(struct gmonhdr);
242 gm.version = GMONVERSION;
243 gm.profrate = 0; /* use ticks */
244 gm.histcounter_type = 0; /* compatibility with moncontrol() */

--- 11 unchanged lines hidden (view full) ---

256 if (write(fd, &buffer, sizeof(buffer)) < 0)
257 goto error;
258 count -= sizeof(buffer);
259 }
260
261 if (write(fd, &buffer, count) < 0)
262 goto error;
263
436
437 gm.lpc = image->pi_start;
438 gm.hpc = image->pi_end;
439 gm.ncnt = (pgf->pgf_nbuckets * sizeof(HISTCOUNTER)) +
440 sizeof(struct gmonhdr);
441 gm.version = GMONVERSION;
442 gm.profrate = 0; /* use ticks */
443 gm.histcounter_type = 0; /* compatibility with moncontrol() */

--- 11 unchanged lines hidden (view full) ---

455 if (write(fd, &buffer, sizeof(buffer)) < 0)
456 goto error;
457 count -= sizeof(buffer);
458 }
459
460 if (write(fd, &buffer, count) < 0)
461 goto error;
462
463 /* TODO size the arc table */
464
264 (void) close(fd);
265
266 return;
267
268 error:
465 (void) close(fd);
466
467 return;
468
469 error:
269 err(EX_OSERR, "ERROR: Cannot write \"%s\"", pgf->pgf_name);
470 err(EX_OSERR, "ERROR: Cannot write \"%s\"", pathname);
270}
271
471}
472
272const char *
473/*
474 * Determine the full pathname of a gmon.out file for a given
475 * (image,pmcid) combination. Return the interned string.
476 */
477
478pmcstat_interned_string
273pmcstat_gmon_create_name(const char *samplesdir, struct pmcstat_image *image,
274 pmc_id_t pmcid)
275{
276 const char *pmcname;
277 char fullpath[PATH_MAX];
278
279 pmcname = pmcstat_pmcid_to_name(pmcid);
280
281 (void) snprintf(fullpath, sizeof(fullpath),
479pmcstat_gmon_create_name(const char *samplesdir, struct pmcstat_image *image,
480 pmc_id_t pmcid)
481{
482 const char *pmcname;
483 char fullpath[PATH_MAX];
484
485 pmcname = pmcstat_pmcid_to_name(pmcid);
486
487 (void) snprintf(fullpath, sizeof(fullpath),
282 "%s/%s/%s", samplesdir, pmcname, image->pi_samplename);
488 "%s/%s/%s", samplesdir, pmcname,
489 pmcstat_string_unintern(image->pi_samplename));
283
490
284 return pmcstat_string_intern(fullpath);
491 return (pmcstat_string_intern(fullpath));
285}
286
287
492}
493
494
495/*
496 * Mmap in a gmon.out file for processing.
497 */
498
288static void
289pmcstat_gmon_map_file(struct pmcstat_gmonfile *pgf)
290{
291 int fd;
499static void
500pmcstat_gmon_map_file(struct pmcstat_gmonfile *pgf)
501{
502 int fd;
503 const char *pathname;
292
504
505 pathname = pmcstat_string_unintern(pgf->pgf_name);
506
293 /* the gmon.out file must already exist */
507 /* the gmon.out file must already exist */
294 if ((fd = open(pgf->pgf_name, O_RDWR | O_NOFOLLOW, 0)) < 0)
295 err(EX_OSERR, "ERROR: cannot open \"%s\"",
296 pgf->pgf_name);
508 if ((fd = open(pathname, O_RDWR | O_NOFOLLOW, 0)) < 0)
509 err(EX_OSERR, "ERROR: cannot open \"%s\"", pathname);
297
298 pgf->pgf_gmondata = mmap(NULL, pgf->pgf_ndatabytes,
299 PROT_READ|PROT_WRITE, MAP_NOSYNC|MAP_SHARED, fd, 0);
300
301 if (pgf->pgf_gmondata == MAP_FAILED)
510
511 pgf->pgf_gmondata = mmap(NULL, pgf->pgf_ndatabytes,
512 PROT_READ|PROT_WRITE, MAP_NOSYNC|MAP_SHARED, fd, 0);
513
514 if (pgf->pgf_gmondata == MAP_FAILED)
302 /* XXX unmap a few files and try again? */
303 err(EX_OSERR, "ERROR: cannot map \"%s\"", pgf->pgf_name);
515 err(EX_OSERR, "ERROR: cannot map \"%s\"", pathname);
304
305 (void) close(fd);
306}
307
308/*
516
517 (void) close(fd);
518}
519
520/*
309 * Unmap the data mapped from a gmon.out file.
521 * Unmap a gmon.out file after sync'ing its data to disk.
310 */
311
312static void
313pmcstat_gmon_unmap_file(struct pmcstat_gmonfile *pgf)
314{
315 (void) msync(pgf->pgf_gmondata, pgf->pgf_ndatabytes,
316 MS_SYNC);
317 (void) munmap(pgf->pgf_gmondata, pgf->pgf_ndatabytes);
318 pgf->pgf_gmondata = NULL;
319}
320
522 */
523
524static void
525pmcstat_gmon_unmap_file(struct pmcstat_gmonfile *pgf)
526{
527 (void) msync(pgf->pgf_gmondata, pgf->pgf_ndatabytes,
528 MS_SYNC);
529 (void) munmap(pgf->pgf_gmondata, pgf->pgf_ndatabytes);
530 pgf->pgf_gmondata = NULL;
531}
532
533/*
534 * Determine whether a given executable image is an A.OUT object, and
535 * if so, fill in its parameters from the text file.
536 * Sets image->pi_type.
537 */
538
321static void
539static void
322pmcstat_image_get_elf_params(struct pmcstat_image *image)
540pmcstat_image_get_aout_params(struct pmcstat_image *image,
541 struct pmcstat_args *a)
323{
542{
543 int fd;
544 ssize_t nbytes;
545 struct exec ex;
546 const char *path;
547 char buffer[PATH_MAX];
548
549 path = pmcstat_string_unintern(image->pi_execpath);
550 assert(path != NULL);
551
552 if (image->pi_iskernelmodule)
553 errx(EX_SOFTWARE, "ERROR: a.out kernel modules are "
554 "unsupported \"%s\"", path);
555
556 (void) snprintf(buffer, sizeof(buffer), "%s%s",
557 a->pa_fsroot, path);
558
559 if ((fd = open(buffer, O_RDONLY, 0)) < 0 ||
560 (nbytes = read(fd, &ex, sizeof(ex))) < 0) {
561 warn("WARNING: Cannot determine type of \"%s\"", path);
562 image->pi_type = PMCSTAT_IMAGE_INDETERMINABLE;
563 if (fd != -1)
564 (void) close(fd);
565 return;
566 }
567
568 (void) close(fd);
569
570 if ((unsigned) nbytes != sizeof(ex) ||
571 N_BADMAG(ex))
572 return;
573
574 image->pi_type = PMCSTAT_IMAGE_AOUT;
575
576 /* TODO: the rest of a.out processing */
577
578 return;
579}
580
581/*
582 * Examine an ELF file to determine the size of its text segment.
583 * Sets image->pi_type if anything conclusive can be determined about
584 * this image.
585 */
586
587static void
588pmcstat_image_get_elf_params(struct pmcstat_image *image,
589 struct pmcstat_args *a)
590{
324 int fd, i;
591 int fd, i;
325 struct stat st;
592 const char *path;
326 void *mapbase;
327 uintfptr_t minva, maxva;
328 const Elf_Ehdr *h;
329 const Elf_Phdr *ph;
330 const Elf_Shdr *sh;
331#if defined(__amd64__)
332 const Elf32_Ehdr *h32;
333 const Elf32_Phdr *ph32;
334 const Elf32_Shdr *sh32;
335#endif
593 void *mapbase;
594 uintfptr_t minva, maxva;
595 const Elf_Ehdr *h;
596 const Elf_Phdr *ph;
597 const Elf_Shdr *sh;
598#if defined(__amd64__)
599 const Elf32_Ehdr *h32;
600 const Elf32_Phdr *ph32;
601 const Elf32_Shdr *sh32;
602#endif
336 const char *path;
603 enum pmcstat_image_type image_type;
604 struct stat st;
605 char buffer[PATH_MAX];
337
338 assert(image->pi_type == PMCSTAT_IMAGE_UNKNOWN);
339
340 minva = ~(uintfptr_t) 0;
341 maxva = (uintfptr_t) 0;
606
607 assert(image->pi_type == PMCSTAT_IMAGE_UNKNOWN);
608
609 minva = ~(uintfptr_t) 0;
610 maxva = (uintfptr_t) 0;
342 path = image->pi_internedpath;
611 path = pmcstat_string_unintern(image->pi_execpath);
343
612
344 if ((fd = open(path, O_RDONLY, 0)) < 0)
345 err(EX_OSERR, "ERROR: Cannot open \"%s\"", path);
613 assert(path != NULL);
346
614
347 if (fstat(fd, &st) < 0)
348 err(EX_OSERR, "ERROR: Cannot stat \"%s\"", path);
615 /*
616 * Look for kernel modules under FSROOT/KERNELPATH/NAME,
617 * and user mode executable objects under FSROOT/PATHNAME.
618 */
619 if (image->pi_iskernelmodule)
620 (void) snprintf(buffer, sizeof(buffer), "%s%s/%s",
621 a->pa_fsroot, a->pa_kernel, path);
622 else
623 (void) snprintf(buffer, sizeof(buffer), "%s%s",
624 a->pa_fsroot, path);
349
625
350 if ((mapbase = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0)) ==
351 MAP_FAILED)
352 err(EX_OSERR, "ERROR: Cannot mmap \"%s\"", path);
626 if ((fd = open(buffer, O_RDONLY, 0)) < 0 ||
627 fstat(fd, &st) < 0 ||
628 (mapbase = mmap(0, st.st_size, PROT_READ, MAP_SHARED,
629 fd, 0)) == MAP_FAILED) {
630 warn("WARNING: Cannot determine type of \"%s\"", buffer);
631 image->pi_type = PMCSTAT_IMAGE_INDETERMINABLE;
632 if (fd != -1)
633 (void) close(fd);
634 return;
635 }
353
354 (void) close(fd);
355
636
637 (void) close(fd);
638
639 /* Punt on non-ELF objects */
356 h = (const Elf_Ehdr *) mapbase;
357 if (!IS_ELF(*h))
640 h = (const Elf_Ehdr *) mapbase;
641 if (!IS_ELF(*h))
358 err(EX_SOFTWARE, "ERROR: \"%s\" not an ELF file", path);
642 return;
359
643
360 /* we only handle executable objects */
361 if (h->e_type != ET_EXEC && h->e_type != ET_DYN)
362 err(EX_DATAERR, "ERROR: Unknown file type for \"%s\"",
363 image->pi_internedpath);
644 /*
645 * We only handle executable ELF objects and kernel
646 * modules.
647 */
648 if (h->e_type != ET_EXEC && h->e_type != ET_DYN &&
649 !(image->pi_iskernelmodule && h->e_type == ET_REL))
650 return;
364
651
652 image->pi_isdynamic = 0;
653 image->pi_dynlinkerpath = NULL;
654 image->pi_vaddr = 0;
655
365#define GET_VA(H, SH, MINVA, MAXVA) do { \
366 for (i = 0; i < (H)->e_shnum; i++) \
367 if ((SH)[i].sh_flags & SHF_EXECINSTR) { \
368 (MINVA) = min((MINVA),(SH)[i].sh_addr); \
369 (MAXVA) = max((MAXVA),(SH)[i].sh_addr + \
370 (SH)[i].sh_size); \
371 } \
372 } while (0)
373
374
375#define GET_PHDR_INFO(H, PH, IMAGE) do { \
376 for (i = 0; i < (H)->e_phnum; i++) { \
377 switch ((PH)[i].p_type) { \
378 case PT_DYNAMIC: \
379 image->pi_isdynamic = 1; \
380 break; \
381 case PT_INTERP: \
382 image->pi_dynlinkerpath = \
383 pmcstat_string_intern( \
656#define GET_VA(H, SH, MINVA, MAXVA) do { \
657 for (i = 0; i < (H)->e_shnum; i++) \
658 if ((SH)[i].sh_flags & SHF_EXECINSTR) { \
659 (MINVA) = min((MINVA),(SH)[i].sh_addr); \
660 (MAXVA) = max((MAXVA),(SH)[i].sh_addr + \
661 (SH)[i].sh_size); \
662 } \
663 } while (0)
664
665
666#define GET_PHDR_INFO(H, PH, IMAGE) do { \
667 for (i = 0; i < (H)->e_phnum; i++) { \
668 switch ((PH)[i].p_type) { \
669 case PT_DYNAMIC: \
670 image->pi_isdynamic = 1; \
671 break; \
672 case PT_INTERP: \
673 image->pi_dynlinkerpath = \
674 pmcstat_string_intern( \
384 (char *) mapbase + \
675 (char *) mapbase + \
385 (PH)[i].p_offset); \
386 break; \
676 (PH)[i].p_offset); \
677 break; \
678 case PT_LOAD: \
679 if ((PH)[i].p_offset == 0) \
680 image->pi_vaddr = \
681 (PH)[i].p_vaddr; \
682 break; \
387 } \
388 } \
389 } while (0)
390
683 } \
684 } \
685 } while (0)
686
391 image->pi_type = PMCSTAT_IMAGE_ELF;
392 image->pi_isdynamic = 0;
393 image->pi_dynlinkerpath = NULL;
394
395 switch (h->e_machine) {
396 case EM_386:
397 case EM_486:
398#if defined(__amd64__)
399 /* a 32 bit executable */
400 h32 = (const Elf32_Ehdr *) h;
401 sh32 = (const Elf32_Shdr *)((uintptr_t) mapbase + h32->e_shoff);
402
403 GET_VA(h32, sh32, minva, maxva);
404
405 image->pi_entry = h32->e_entry;
406
407 if (h32->e_type == ET_EXEC) {
408 ph32 = (const Elf32_Phdr *)((uintptr_t) mapbase +
409 h32->e_phoff);
410 GET_PHDR_INFO(h32, ph32, image);
411 }
687 switch (h->e_machine) {
688 case EM_386:
689 case EM_486:
690#if defined(__amd64__)
691 /* a 32 bit executable */
692 h32 = (const Elf32_Ehdr *) h;
693 sh32 = (const Elf32_Shdr *)((uintptr_t) mapbase + h32->e_shoff);
694
695 GET_VA(h32, sh32, minva, maxva);
696
697 image->pi_entry = h32->e_entry;
698
699 if (h32->e_type == ET_EXEC) {
700 ph32 = (const Elf32_Phdr *)((uintptr_t) mapbase +
701 h32->e_phoff);
702 GET_PHDR_INFO(h32, ph32, image);
703 }
704 image_type = PMCSTAT_IMAGE_ELF32;
412 break;
413#endif
414 default:
415 sh = (const Elf_Shdr *)((uintptr_t) mapbase + h->e_shoff);
416
417 GET_VA(h, sh, minva, maxva);
418
419 image->pi_entry = h->e_entry;
420
421 if (h->e_type == ET_EXEC) {
422 ph = (const Elf_Phdr *)((uintptr_t) mapbase +
423 h->e_phoff);
424 GET_PHDR_INFO(h, ph, image);
425 }
705 break;
706#endif
707 default:
708 sh = (const Elf_Shdr *)((uintptr_t) mapbase + h->e_shoff);
709
710 GET_VA(h, sh, minva, maxva);
711
712 image->pi_entry = h->e_entry;
713
714 if (h->e_type == ET_EXEC) {
715 ph = (const Elf_Phdr *)((uintptr_t) mapbase +
716 h->e_phoff);
717 GET_PHDR_INFO(h, ph, image);
718 }
719 image_type = PMCSTAT_IMAGE_ELF64;
426 break;
427 }
428
429#undef GET_PHDR_INFO
430#undef GET_VA
431
432 image->pi_start = minva;
720 break;
721 }
722
723#undef GET_PHDR_INFO
724#undef GET_VA
725
726 image->pi_start = minva;
433 image->pi_end = maxva;
727 image->pi_end = maxva;
728 image->pi_type = image_type;
434
435 if (munmap(mapbase, st.st_size) < 0)
436 err(EX_OSERR, "ERROR: Cannot unmap \"%s\"", path);
729
730 if (munmap(mapbase, st.st_size) < 0)
731 err(EX_OSERR, "ERROR: Cannot unmap \"%s\"", path);
732 return;
733}
437
734
735/*
736 * Given an image descriptor, determine whether it is an ELF, or AOUT.
737 * If no handler claims the image, set its type to 'INDETERMINABLE'.
738 */
739
740static void
741pmcstat_image_determine_type(struct pmcstat_image *image,
742 struct pmcstat_args *a)
743{
744 assert(image->pi_type == PMCSTAT_IMAGE_UNKNOWN);
745
746 /* Try each kind of handler in turn */
747 if (image->pi_type == PMCSTAT_IMAGE_UNKNOWN)
748 pmcstat_image_get_elf_params(image, a);
749 if (image->pi_type == PMCSTAT_IMAGE_UNKNOWN)
750 pmcstat_image_get_aout_params(image, a);
751
752 /*
753 * Otherwise, remember that we tried to determine
754 * the object's type and had failed.
755 */
756 if (image->pi_type == PMCSTAT_IMAGE_UNKNOWN)
757 image->pi_type = PMCSTAT_IMAGE_INDETERMINABLE;
438}
439
440/*
441 * Locate an image descriptor given an interned path, adding a fresh
442 * descriptor to the cache if necessary. This function also finds a
443 * suitable name for this image's sample file.
758}
759
760/*
761 * Locate an image descriptor given an interned path, adding a fresh
762 * descriptor to the cache if necessary. This function also finds a
763 * suitable name for this image's sample file.
764 *
765 * We defer filling in the file format specific parts of the image
766 * structure till the time we actually see a sample that would fall
767 * into this image.
444 */
445
446static struct pmcstat_image *
768 */
769
770static struct pmcstat_image *
447pmcstat_image_from_path(const char *internedpath)
771pmcstat_image_from_path(pmcstat_interned_string internedpath,
772 int iskernelmodule)
448{
449 int count, hash, nlen;
450 struct pmcstat_image *pi;
451 char *sn;
452 char name[NAME_MAX];
453
773{
774 int count, hash, nlen;
775 struct pmcstat_image *pi;
776 char *sn;
777 char name[NAME_MAX];
778
454 hash = pmcstat_string_compute_hash(internedpath);
779 hash = pmcstat_string_lookup_hash(internedpath);
455
780
456 /* Look for an existing entry. */
781 /* First, look for an existing entry. */
457 LIST_FOREACH(pi, &pmcstat_image_hash[hash], pi_next)
782 LIST_FOREACH(pi, &pmcstat_image_hash[hash], pi_next)
458 if (pi->pi_internedpath == internedpath) {
783 if (pi->pi_execpath == internedpath &&
784 pi->pi_iskernelmodule == iskernelmodule) {
459 /* move descriptor to the head of the lru list */
460 TAILQ_REMOVE(&pmcstat_image_lru, pi, pi_lru);
461 TAILQ_INSERT_HEAD(&pmcstat_image_lru, pi, pi_lru);
785 /* move descriptor to the head of the lru list */
786 TAILQ_REMOVE(&pmcstat_image_lru, pi, pi_lru);
787 TAILQ_INSERT_HEAD(&pmcstat_image_lru, pi, pi_lru);
462 return pi;
788 return (pi);
463 }
464
465 /*
466 * Allocate a new entry and place at the head of the hash and
467 * LRU lists.
468 */
469 pi = malloc(sizeof(*pi));
470 if (pi == NULL)
789 }
790
791 /*
792 * Allocate a new entry and place at the head of the hash and
793 * LRU lists.
794 */
795 pi = malloc(sizeof(*pi));
796 if (pi == NULL)
471 return NULL;
797 return (NULL);
472
473 pi->pi_type = PMCSTAT_IMAGE_UNKNOWN;
798
799 pi->pi_type = PMCSTAT_IMAGE_UNKNOWN;
474 pi->pi_internedpath = internedpath;
800 pi->pi_execpath = internedpath;
475 pi->pi_start = ~0;
476 pi->pi_entry = ~0;
477 pi->pi_end = 0;
801 pi->pi_start = ~0;
802 pi->pi_entry = ~0;
803 pi->pi_end = 0;
804 pi->pi_iskernelmodule = iskernelmodule;
478
479 /*
480 * Look for a suitable name for the sample files associated
481 * with this image: if `basename(path)`+".gmon" is available,
482 * we use that, otherwise we try iterating through
483 * `basename(path)`+ "~" + NNN + ".gmon" till we get a free
484 * entry.
485 */
805
806 /*
807 * Look for a suitable name for the sample files associated
808 * with this image: if `basename(path)`+".gmon" is available,
809 * we use that, otherwise we try iterating through
810 * `basename(path)`+ "~" + NNN + ".gmon" till we get a free
811 * entry.
812 */
486 if ((sn = basename(internedpath)) == NULL)
487 err(EX_OSERR, "ERROR: Cannot process \"%s\"", internedpath);
813 if ((sn = basename(pmcstat_string_unintern(internedpath))) == NULL)
814 err(EX_OSERR, "ERROR: Cannot process \"%s\"",
815 pmcstat_string_unintern(internedpath));
488
489 nlen = strlen(sn);
816
817 nlen = strlen(sn);
490 nlen = min(nlen, (int) sizeof(name) - 6); /* ".gmon\0" */
818 nlen = min(nlen, (int) (sizeof(name) - sizeof(".gmon")));
491
492 snprintf(name, sizeof(name), "%.*s.gmon", nlen, sn);
493
819
820 snprintf(name, sizeof(name), "%.*s.gmon", nlen, sn);
821
822 /* try use the unabridged name first */
494 if (pmcstat_string_lookup(name) == NULL)
495 pi->pi_samplename = pmcstat_string_intern(name);
496 else {
823 if (pmcstat_string_lookup(name) == NULL)
824 pi->pi_samplename = pmcstat_string_intern(name);
825 else {
826 /*
827 * Otherwise use a prefix from the original name and
828 * upto 3 digits.
829 */
497 nlen = strlen(sn);
830 nlen = strlen(sn);
498 nlen = min(nlen, (int) sizeof(name)-10); /* "~ddd.gmon\0" */
831 nlen = min(nlen, (int) (sizeof(name)-sizeof("~NNN.gmon")));
499 count = 0;
500 do {
832 count = 0;
833 do {
501 count++;
502 snprintf(name, sizeof(name), "%.*s~%3.3d",
834 if (++count > 999)
835 errx(EX_CANTCREAT, "ERROR: cannot create a gmon "
836 "file for \"%s\"", name);
837 snprintf(name, sizeof(name), "%.*s~%3.3d.gmon",
503 nlen, sn, count);
504 if (pmcstat_string_lookup(name) == NULL) {
505 pi->pi_samplename = pmcstat_string_intern(name);
506 count = 0;
507 }
508 } while (count > 0);
509 }
510
838 nlen, sn, count);
839 if (pmcstat_string_lookup(name) == NULL) {
840 pi->pi_samplename = pmcstat_string_intern(name);
841 count = 0;
842 }
843 } while (count > 0);
844 }
845
846
511 LIST_INIT(&pi->pi_gmlist);
512
513 LIST_INSERT_HEAD(&pmcstat_image_hash[hash], pi, pi_next);
514 TAILQ_INSERT_HEAD(&pmcstat_image_lru, pi, pi_lru);
515
847 LIST_INIT(&pi->pi_gmlist);
848
849 LIST_INSERT_HEAD(&pmcstat_image_hash[hash], pi, pi_next);
850 TAILQ_INSERT_HEAD(&pmcstat_image_lru, pi, pi_lru);
851
516 return pi;
852 return (pi);
517}
518
519/*
853}
854
855/*
520 * Given an open file, determine its file type.
521 */
522
523static enum pmcstat_image_type
524pmcstat_image_get_type(const char *path)
525{
526 int fd;
527 Elf_Ehdr eh;
528 struct exec ex;
529 ssize_t nbytes;
530 char buffer[DEFAULT_BUFFER_SIZE];
531
532 if ((fd = open(path, O_RDONLY)) < 0)
533 err(EX_OSERR, "ERROR: Cannot open \"%s\"", path);
534
535 nbytes = max(sizeof(eh), sizeof(ex));
536 if ((nbytes = pread(fd, buffer, nbytes, 0)) < 0)
537 err(EX_OSERR, "ERROR: Cannot read \"%s\"", path);
538
539 (void) close(fd);
540
541 /* check if its an ELF file */
542 if ((unsigned) nbytes >= sizeof(Elf_Ehdr)) {
543 bcopy(buffer, &eh, sizeof(eh));
544 if (IS_ELF(eh))
545 return PMCSTAT_IMAGE_ELF;
546 }
547
548 /* Look for an A.OUT header */
549 if ((unsigned) nbytes >= sizeof(struct exec)) {
550 bcopy(buffer, &ex, sizeof(ex));
551 if (!N_BADMAG(ex))
552 return PMCSTAT_IMAGE_AOUT;
553 }
554
555 return PMCSTAT_IMAGE_UNKNOWN;
556}
557
558/*
559 * Increment the bucket in the gmon.out file corresponding to 'pmcid'
560 * and 'pc'.
561 */
562
563static void
564pmcstat_image_increment_bucket(struct pmcstat_pcmap *map, uintfptr_t pc,
565 pmc_id_t pmcid, struct pmcstat_args *a)
566{
567 struct pmcstat_image *image;
568 struct pmcstat_gmonfile *pgf;
569 uintfptr_t bucket;
570 HISTCOUNTER *hc;
571
572 assert(pc >= map->ppm_lowpc && pc < map->ppm_highpc);
573
856 * Increment the bucket in the gmon.out file corresponding to 'pmcid'
857 * and 'pc'.
858 */
859
860static void
861pmcstat_image_increment_bucket(struct pmcstat_pcmap *map, uintfptr_t pc,
862 pmc_id_t pmcid, struct pmcstat_args *a)
863{
864 struct pmcstat_image *image;
865 struct pmcstat_gmonfile *pgf;
866 uintfptr_t bucket;
867 HISTCOUNTER *hc;
868
869 assert(pc >= map->ppm_lowpc && pc < map->ppm_highpc);
870
871 image = map->ppm_image;
872
574 /*
873 /*
575 * Find the gmon file corresponding to 'pmcid', creating it if
576 * needed.
874 * If this is the first time we are seeing a sample for
875 * this executable image, try determine its parameters.
577 */
876 */
877 if (image->pi_type == PMCSTAT_IMAGE_UNKNOWN)
878 pmcstat_image_determine_type(image, a);
578
879
579 image = map->ppm_image;
880 assert(image->pi_type != PMCSTAT_IMAGE_UNKNOWN);
580
881
882 /* Ignore samples in images that we know nothing about. */
883 if (image->pi_type == PMCSTAT_IMAGE_INDETERMINABLE) {
884 pmcstat_stats.ps_samples_indeterminable++;
885 return;
886 }
887
888 /*
889 * Find the gmon file corresponding to 'pmcid', creating it if
890 * needed.
891 */
581 LIST_FOREACH(pgf, &image->pi_gmlist, pgf_next)
582 if (pgf->pgf_pmcid == pmcid)
583 break;
584
585 /* If we don't have a gmon.out file for this PMCid, create one */
586 if (pgf == NULL) {
587 if ((pgf = calloc(1, sizeof(*pgf))) == NULL)
588 err(EX_OSERR, "ERROR:");

--- 15 unchanged lines hidden (view full) ---

604
605 /*
606 * Map the gmon file in if needed. It may have been mapped
607 * out under memory pressure.
608 */
609 if (pgf->pgf_gmondata == NULL)
610 pmcstat_gmon_map_file(pgf);
611
892 LIST_FOREACH(pgf, &image->pi_gmlist, pgf_next)
893 if (pgf->pgf_pmcid == pmcid)
894 break;
895
896 /* If we don't have a gmon.out file for this PMCid, create one */
897 if (pgf == NULL) {
898 if ((pgf = calloc(1, sizeof(*pgf))) == NULL)
899 err(EX_OSERR, "ERROR:");

--- 15 unchanged lines hidden (view full) ---

915
916 /*
917 * Map the gmon file in if needed. It may have been mapped
918 * out under memory pressure.
919 */
920 if (pgf->pgf_gmondata == NULL)
921 pmcstat_gmon_map_file(pgf);
922
923 assert(pgf->pgf_gmondata != NULL);
924
925 /*
926 *
927 */
928
612 bucket = (pc - map->ppm_lowpc) / FUNCTION_ALIGNMENT;
613
614 assert(bucket < pgf->pgf_nbuckets);
615
616 hc = (HISTCOUNTER *) ((uintptr_t) pgf->pgf_gmondata +
617 sizeof(struct gmonhdr));
618
619 /* saturating add */
929 bucket = (pc - map->ppm_lowpc) / FUNCTION_ALIGNMENT;
930
931 assert(bucket < pgf->pgf_nbuckets);
932
933 hc = (HISTCOUNTER *) ((uintptr_t) pgf->pgf_gmondata +
934 sizeof(struct gmonhdr));
935
936 /* saturating add */
620 if (hc[bucket] < 0xFFFF)
937 if (hc[bucket] < 0xFFFFU) /* XXX tie this to sizeof(HISTCOUNTER) */
621 hc[bucket]++;
938 hc[bucket]++;
622
939 else /* mark that an overflow occurred */
940 pgf->pgf_overflow = 1;
623}
624
625/*
941}
942
943/*
626 * Record the fact that PC values from 'lowpc' to 'highpc' come from
944 * Record the fact that PC values from 'start' to 'end' come from
627 * image 'image'.
628 */
629
630static void
631pmcstat_image_link(struct pmcstat_process *pp, struct pmcstat_image *image,
945 * image 'image'.
946 */
947
948static void
949pmcstat_image_link(struct pmcstat_process *pp, struct pmcstat_image *image,
632 uintfptr_t lowpc, uintfptr_t highpc)
950 uintfptr_t start)
633{
634 struct pmcstat_pcmap *pcm, *pcmnew;
951{
952 struct pmcstat_pcmap *pcm, *pcmnew;
953 uintfptr_t offset;
635
954
955 assert(image->pi_type != PMCSTAT_IMAGE_UNKNOWN &&
956 image->pi_type != PMCSTAT_IMAGE_INDETERMINABLE);
957
636 if ((pcmnew = malloc(sizeof(*pcmnew))) == NULL)
958 if ((pcmnew = malloc(sizeof(*pcmnew))) == NULL)
637 err(EX_OSERR, "ERROR: ");
959 err(EX_OSERR, "ERROR: Cannot create a map entry");
638
960
639 pcmnew->ppm_lowpc = lowpc;
640 pcmnew->ppm_highpc = highpc;
961 /*
962 * Adjust the map entry to only cover the text portion
963 * of the object.
964 */
965
966 offset = start - image->pi_vaddr;
967 pcmnew->ppm_lowpc = image->pi_start + offset;
968 pcmnew->ppm_highpc = image->pi_end + offset;
641 pcmnew->ppm_image = image;
642
969 pcmnew->ppm_image = image;
970
971 assert(pcmnew->ppm_lowpc < pcmnew->ppm_highpc);
972
973 /* Overlapped mmap()'s are assumed to never occur. */
643 TAILQ_FOREACH(pcm, &pp->pp_map, ppm_next)
974 TAILQ_FOREACH(pcm, &pp->pp_map, ppm_next)
644 if (pcm->ppm_lowpc < lowpc)
975 if (pcm->ppm_lowpc >= pcmnew->ppm_highpc)
645 break;
646
647 if (pcm == NULL)
648 TAILQ_INSERT_TAIL(&pp->pp_map, pcmnew, ppm_next);
649 else
650 TAILQ_INSERT_BEFORE(pcm, pcmnew, ppm_next);
651}
652
653/*
976 break;
977
978 if (pcm == NULL)
979 TAILQ_INSERT_TAIL(&pp->pp_map, pcmnew, ppm_next);
980 else
981 TAILQ_INSERT_BEFORE(pcm, pcmnew, ppm_next);
982}
983
984/*
985 * Unmap images in the range [start..end) associated with process
986 * 'pp'.
987 */
988
989static void
990pmcstat_image_unmap(struct pmcstat_process *pp, uintfptr_t start,
991 uintfptr_t end)
992{
993 struct pmcstat_pcmap *pcm, *pcmtmp, *pcmnew;
994
995 assert(pp != NULL);
996 assert(start < end);
997
998 /*
999 * Cases:
1000 * - we could have the range completely in the middle of an
1001 * existing pcmap; in this case we have to split the pcmap
1002 * structure into two (i.e., generate a 'hole').
1003 * - we could have the range covering multiple pcmaps; these
1004 * will have to be removed.
1005 * - we could have either 'start' or 'end' falling in the
1006 * middle of a pcmap; in this case shorten the entry.
1007 */
1008
1009 TAILQ_FOREACH_SAFE(pcm, &pp->pp_map, ppm_next, pcmtmp) {
1010 assert(pcm->ppm_lowpc < pcm->ppm_highpc);
1011 if (pcm->ppm_highpc <= start)
1012 continue;
1013 if (pcm->ppm_lowpc > end)
1014 return;
1015 if (pcm->ppm_lowpc >= start && pcm->ppm_highpc <= end) {
1016 /*
1017 * The current pcmap is completely inside the
1018 * unmapped range: remove it entirely.
1019 */
1020 TAILQ_REMOVE(&pp->pp_map, pcm, ppm_next);
1021 free(pcm);
1022 } else if (pcm->ppm_lowpc < start && pcm->ppm_highpc > end) {
1023 /*
1024 * Split this pcmap into two; curtail the
1025 * current map to end at [start-1], and start
1026 * the new one at [end].
1027 */
1028 if ((pcmnew = malloc(sizeof(*pcmnew))) == NULL)
1029 err(EX_OSERR, "ERROR: Cannot split a map "
1030 "entry");
1031
1032 pcmnew->ppm_image = pcm->ppm_image;
1033
1034 pcmnew->ppm_lowpc = end;
1035 pcmnew->ppm_highpc = pcm->ppm_highpc;
1036
1037 pcm->ppm_highpc = start;
1038
1039 TAILQ_INSERT_AFTER(&pp->pp_map, pcm, pcmnew, ppm_next);
1040
1041 return;
1042 } else if (pcm->ppm_lowpc < start)
1043 pcm->ppm_lowpc = start;
1044 else if (pcm->ppm_highpc > end)
1045 pcm->ppm_highpc = end;
1046 else
1047 assert(0);
1048 }
1049}
1050
1051/*
654 * Add a {pmcid,name} mapping.
655 */
656
657static void
1052 * Add a {pmcid,name} mapping.
1053 */
1054
1055static void
658pmcstat_pmcid_add(pmc_id_t pmcid, const char *name, struct pmcstat_args *a)
1056pmcstat_pmcid_add(pmc_id_t pmcid, pmcstat_interned_string ps,
1057 struct pmcstat_args *a)
659{
660 struct pmcstat_pmcrecord *pr;
661 struct stat st;
662 char fullpath[PATH_MAX];
663
664 LIST_FOREACH(pr, &pmcstat_pmcs, pr_next)
665 if (pr->pr_pmcid == pmcid) {
1058{
1059 struct pmcstat_pmcrecord *pr;
1060 struct stat st;
1061 char fullpath[PATH_MAX];
1062
1063 LIST_FOREACH(pr, &pmcstat_pmcs, pr_next)
1064 if (pr->pr_pmcid == pmcid) {
666 pr->pr_pmcname = name;
1065 pr->pr_pmcname = ps;
667 return;
668 }
669
670 if ((pr = malloc(sizeof(*pr))) == NULL)
671 err(EX_OSERR, "ERROR: Cannot allocate pmc record");
672
673 pr->pr_pmcid = pmcid;
1066 return;
1067 }
1068
1069 if ((pr = malloc(sizeof(*pr))) == NULL)
1070 err(EX_OSERR, "ERROR: Cannot allocate pmc record");
1071
1072 pr->pr_pmcid = pmcid;
674 pr->pr_pmcname = name;
1073 pr->pr_pmcname = ps;
675 LIST_INSERT_HEAD(&pmcstat_pmcs, pr, pr_next);
676
677 (void) snprintf(fullpath, sizeof(fullpath), "%s/%s", a->pa_samplesdir,
1074 LIST_INSERT_HEAD(&pmcstat_pmcs, pr, pr_next);
1075
1076 (void) snprintf(fullpath, sizeof(fullpath), "%s/%s", a->pa_samplesdir,
678 name);
1077 pmcstat_string_unintern(ps));
679
680 /* If the path name exists, it should be a directory */
681 if (stat(fullpath, &st) == 0 && S_ISDIR(st.st_mode))
682 return;
683
684 if (mkdir(fullpath, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) < 0)
685 err(EX_OSERR, "ERROR: Cannot create directory \"%s\"",
686 fullpath);
687}
688
689/*
1078
1079 /* If the path name exists, it should be a directory */
1080 if (stat(fullpath, &st) == 0 && S_ISDIR(st.st_mode))
1081 return;
1082
1083 if (mkdir(fullpath, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) < 0)
1084 err(EX_OSERR, "ERROR: Cannot create directory \"%s\"",
1085 fullpath);
1086}
1087
1088/*
690 * Given a pmcid in use, find its human-readable name, or a
1089 * Given a pmcid in use, find its human-readable name.
691 */
692
693static const char *
694pmcstat_pmcid_to_name(pmc_id_t pmcid)
695{
696 struct pmcstat_pmcrecord *pr;
697 char fullpath[PATH_MAX];
698
699 LIST_FOREACH(pr, &pmcstat_pmcs, pr_next)
700 if (pr->pr_pmcid == pmcid)
1090 */
1091
1092static const char *
1093pmcstat_pmcid_to_name(pmc_id_t pmcid)
1094{
1095 struct pmcstat_pmcrecord *pr;
1096 char fullpath[PATH_MAX];
1097
1098 LIST_FOREACH(pr, &pmcstat_pmcs, pr_next)
1099 if (pr->pr_pmcid == pmcid)
701 return pr->pr_pmcname;
1100 return (pmcstat_string_unintern(pr->pr_pmcname));
702
703 /* create a default name and add this entry */
704 if ((pr = malloc(sizeof(*pr))) == NULL)
705 err(EX_OSERR, "ERROR: ");
706 pr->pr_pmcid = pmcid;
707
708 (void) snprintf(fullpath, sizeof(fullpath), "%X", (unsigned int) pmcid);
709 pr->pr_pmcname = pmcstat_string_intern(fullpath);
710
711 LIST_INSERT_HEAD(&pmcstat_pmcs, pr, pr_next);
712
1101
1102 /* create a default name and add this entry */
1103 if ((pr = malloc(sizeof(*pr))) == NULL)
1104 err(EX_OSERR, "ERROR: ");
1105 pr->pr_pmcid = pmcid;
1106
1107 (void) snprintf(fullpath, sizeof(fullpath), "%X", (unsigned int) pmcid);
1108 pr->pr_pmcname = pmcstat_string_intern(fullpath);
1109
1110 LIST_INSERT_HEAD(&pmcstat_pmcs, pr, pr_next);
1111
713 return pr->pr_pmcname;
1112 return (pmcstat_string_unintern(pr->pr_pmcname));
714}
715
716/*
1113}
1114
1115/*
717 * Associate an ELF image with a process. Argument 'path' names the
718 * executable while 'fd' is an already open descriptor to it.
1116 * Associate an AOUT image with a process.
719 */
720
721static void
1117 */
1118
1119static void
722pmcstat_process_add_elf_image(struct pmcstat_process *pp, const char *path,
723 uintfptr_t entryaddr)
1120pmcstat_process_aout_exec(struct pmcstat_process *pp,
1121 struct pmcstat_image *image, uintfptr_t entryaddr,
1122 struct pmcstat_args *a)
724{
1123{
725 size_t linelen;
726 FILE *rf;
727 char *line;
728 uintmax_t libstart;
729 struct pmcstat_image *image, *rtldimage;
730 char libname[PATH_MAX], libpath[PATH_MAX];
731 char command[PATH_MAX + sizeof(PMCSTAT_LDD_COMMAND) + 1];
1124 (void) pp;
1125 (void) image;
1126 (void) entryaddr;
1127 (void) a;
1128 /* TODO Implement a.out handling */
1129}
732
1130
733 /* Look up path in the cache. */
734 if ((image = pmcstat_image_from_path(path)) == NULL)
735 return;
1131/*
1132 * Associate an ELF image with a process.
1133 */
736
1134
737 if (image->pi_type == PMCSTAT_IMAGE_UNKNOWN)
738 pmcstat_image_get_elf_params(image);
1135static void
1136pmcstat_process_elf_exec(struct pmcstat_process *pp,
1137 struct pmcstat_image *image, uintfptr_t entryaddr,
1138 struct pmcstat_args *a)
1139{
1140 uintmax_t libstart;
1141 struct pmcstat_image *rtldimage;
739
1142
1143 assert(image->pi_type == PMCSTAT_IMAGE_ELF32 ||
1144 image->pi_type == PMCSTAT_IMAGE_ELF64);
1145
740 /* Create a map entry for the base executable. */
1146 /* Create a map entry for the base executable. */
741 pmcstat_image_link(pp, image, image->pi_start, image->pi_end);
1147 pmcstat_image_link(pp, image, image->pi_vaddr);
742
743 /*
744 * For dynamically linked executables we need to:
745 * (a) find where the dynamic linker was mapped to for this
746 * process,
747 * (b) find all the executable objects that the dynamic linker
748 * brought in.
749 */
1148
1149 /*
1150 * For dynamically linked executables we need to:
1151 * (a) find where the dynamic linker was mapped to for this
1152 * process,
1153 * (b) find all the executable objects that the dynamic linker
1154 * brought in.
1155 */
1156
750 if (image->pi_isdynamic) {
751
752 /*
753 * The runtime loader gets loaded just after the maximum
754 * possible heap address. Like so:
755 *
756 * [ TEXT DATA BSS HEAP -->*RTLD SHLIBS <--STACK]
757 * ^ ^
758 * 0 VM_MAXUSER_ADDRESS
1157 if (image->pi_isdynamic) {
1158
1159 /*
1160 * The runtime loader gets loaded just after the maximum
1161 * possible heap address. Like so:
1162 *
1163 * [ TEXT DATA BSS HEAP -->*RTLD SHLIBS <--STACK]
1164 * ^ ^
1165 * 0 VM_MAXUSER_ADDRESS
1166
759 *
760 * The exact address where the loader gets mapped in
761 * will vary according to the size of the executable
762 * and the limits on the size of the process'es data
763 * segment at the time of exec(). The entry address
764 * recorded at process exec time corresponds to the
765 * 'start' address inside the dynamic linker. From
766 * this we can figure out the address where the
767 * runtime loader's file object had been mapped to.
768 */
1167 *
1168 * The exact address where the loader gets mapped in
1169 * will vary according to the size of the executable
1170 * and the limits on the size of the process'es data
1171 * segment at the time of exec(). The entry address
1172 * recorded at process exec time corresponds to the
1173 * 'start' address inside the dynamic linker. From
1174 * this we can figure out the address where the
1175 * runtime loader's file object had been mapped to.
1176 */
769 rtldimage = pmcstat_image_from_path(image->pi_dynlinkerpath);
770 if (rtldimage == NULL)
771 err(EX_OSERR, "ERROR: Cannot find image for "
772 "\"%s\"", image->pi_dynlinkerpath);
1177 rtldimage = pmcstat_image_from_path(image->pi_dynlinkerpath,
1178 0);
1179 if (rtldimage == NULL) {
1180 warnx("WARNING: Cannot find image for \"%s\".",
1181 pmcstat_string_unintern(image->pi_dynlinkerpath));
1182 pmcstat_stats.ps_exec_errors++;
1183 return;
1184 }
1185
773 if (rtldimage->pi_type == PMCSTAT_IMAGE_UNKNOWN)
1186 if (rtldimage->pi_type == PMCSTAT_IMAGE_UNKNOWN)
774 pmcstat_image_get_elf_params(rtldimage);
1187 pmcstat_image_get_elf_params(rtldimage, a);
775
1188
776 libstart = entryaddr - rtldimage->pi_entry;
777 pmcstat_image_link(pp, rtldimage, libstart,
778 libstart + rtldimage->pi_end - rtldimage->pi_start);
779
780 /* Process all other objects loaded by this executable. */
781 (void) snprintf(command, sizeof(command), "%s %s",
782 PMCSTAT_LDD_COMMAND, path);
783
784 if ((rf = popen(command, "r")) == NULL)
785 err(EX_OSERR, "ERROR: Cannot create pipe");
786
787 (void) fgetln(rf, &linelen);
788
789 while (!feof(rf) && !ferror(rf)) {
790
791 if ((line = fgetln(rf, &linelen)) == NULL)
792 continue;
793 line[linelen-1] = '\0';
794
795 libstart = 0;
796 libpath[0] = libname[0] = '\0';
797 if (sscanf(line, "%s \"%[^\"]\" %jx",
798 libname, libpath, &libstart) != 3)
799 continue;
800
801 if (libstart == 0) {
802 warnx("WARNING: object \"%s\" was not found "
803 "for program \"%s\".", libname, path);
804 continue;
805 }
806
807 image = pmcstat_image_from_path(
808 pmcstat_string_intern(libpath));
809 if (image == NULL)
810 err(EX_OSERR, "ERROR: Cannot process "
811 "\"%s\"", libpath);
812
813 if (image->pi_type == PMCSTAT_IMAGE_UNKNOWN)
814 pmcstat_image_get_elf_params(image);
815
816 pmcstat_image_link(pp, image, libstart + image->pi_start,
817 libstart + image->pi_end);
1189 if (rtldimage->pi_type != PMCSTAT_IMAGE_ELF32 &&
1190 rtldimage->pi_type != PMCSTAT_IMAGE_ELF64) {
1191 warnx("WARNING: rtld not an ELF object \"%s\".",
1192 pmcstat_string_unintern(image->pi_dynlinkerpath));
1193 return;
818 }
819
1194 }
1195
820 (void) pclose(rf);
821
1196 libstart = entryaddr - rtldimage->pi_entry;
1197 pmcstat_image_link(pp, rtldimage, libstart);
822 }
823}
824
825/*
826 * Find the process descriptor corresponding to a PID. If 'allocate'
827 * is zero, we return a NULL if a pid descriptor could not be found or
828 * a process descriptor process. If 'allocate' is non-zero, then we
829 * will attempt to allocate a fresh process descriptor. Zombie

--- 8 unchanged lines hidden (view full) ---

838 struct pmcstat_pcmap *ppm, *ppmtmp;
839 struct pmcstat_process *pp, *pptmp;
840
841 hash = (uint32_t) pid & PMCSTAT_HASH_MASK; /* simplicity wins */
842
843 LIST_FOREACH_SAFE(pp, &pmcstat_process_hash[hash], pp_next, pptmp)
844 if (pp->pp_pid == pid) {
845 /* Found a descriptor, check and process zombies */
1198 }
1199}
1200
1201/*
1202 * Find the process descriptor corresponding to a PID. If 'allocate'
1203 * is zero, we return a NULL if a pid descriptor could not be found or
1204 * a process descriptor process. If 'allocate' is non-zero, then we
1205 * will attempt to allocate a fresh process descriptor. Zombie

--- 8 unchanged lines hidden (view full) ---

1214 struct pmcstat_pcmap *ppm, *ppmtmp;
1215 struct pmcstat_process *pp, *pptmp;
1216
1217 hash = (uint32_t) pid & PMCSTAT_HASH_MASK; /* simplicity wins */
1218
1219 LIST_FOREACH_SAFE(pp, &pmcstat_process_hash[hash], pp_next, pptmp)
1220 if (pp->pp_pid == pid) {
1221 /* Found a descriptor, check and process zombies */
846 if (allocate && !pp->pp_isactive) {
1222 if (allocate && pp->pp_isactive == 0) {
847 /* remove maps */
848 TAILQ_FOREACH_SAFE(ppm, &pp->pp_map, ppm_next,
849 ppmtmp) {
850 TAILQ_REMOVE(&pp->pp_map, ppm, ppm_next);
851 free(ppm);
852 }
853 /* remove process entry */
854 LIST_REMOVE(pp, pp_next);
855 free(pp);
856 break;
857 }
1223 /* remove maps */
1224 TAILQ_FOREACH_SAFE(ppm, &pp->pp_map, ppm_next,
1225 ppmtmp) {
1226 TAILQ_REMOVE(&pp->pp_map, ppm, ppm_next);
1227 free(ppm);
1228 }
1229 /* remove process entry */
1230 LIST_REMOVE(pp, pp_next);
1231 free(pp);
1232 break;
1233 }
858 return pp;
1234 return (pp);
859 }
860
861 if (!allocate)
1235 }
1236
1237 if (!allocate)
862 return NULL;
1238 return (NULL);
863
864 if ((pp = malloc(sizeof(*pp))) == NULL)
865 err(EX_OSERR, "ERROR: Cannot allocate pid descriptor");
866
867 pp->pp_pid = pid;
868 pp->pp_isactive = 1;
869
870 TAILQ_INIT(&pp->pp_map);
871
872 LIST_INSERT_HEAD(&pmcstat_process_hash[hash], pp, pp_next);
1239
1240 if ((pp = malloc(sizeof(*pp))) == NULL)
1241 err(EX_OSERR, "ERROR: Cannot allocate pid descriptor");
1242
1243 pp->pp_pid = pid;
1244 pp->pp_isactive = 1;
1245
1246 TAILQ_INIT(&pp->pp_map);
1247
1248 LIST_INSERT_HEAD(&pmcstat_process_hash[hash], pp, pp_next);
873 return pp;
1249 return (pp);
874}
875
876/*
877 * Associate an image and a process.
878 */
879
880static void
1250}
1251
1252/*
1253 * Associate an image and a process.
1254 */
1255
1256static void
881pmcstat_process_exec(struct pmcstat_process *pp, const char *path,
882 uintfptr_t entryaddr)
1257pmcstat_process_exec(struct pmcstat_process *pp,
1258 pmcstat_interned_string path, uintfptr_t entryaddr,
1259 struct pmcstat_args *a)
883{
1260{
884 enum pmcstat_image_type filetype;
885 struct pmcstat_image *image;
886
1261 struct pmcstat_image *image;
1262
887 if ((image = pmcstat_image_from_path(path)) == NULL)
1263 if ((image = pmcstat_image_from_path(path, 0)) == NULL) {
1264 pmcstat_stats.ps_exec_errors++;
888 return;
1265 return;
1266 }
889
890 if (image->pi_type == PMCSTAT_IMAGE_UNKNOWN)
1267
1268 if (image->pi_type == PMCSTAT_IMAGE_UNKNOWN)
891 filetype = pmcstat_image_get_type(path);
892 else
893 filetype = image->pi_type;
1269 pmcstat_image_determine_type(image, a);
894
1270
895 switch (filetype) {
896 case PMCSTAT_IMAGE_ELF:
897 pmcstat_process_add_elf_image(pp, path, entryaddr);
1271 assert(image->pi_type != PMCSTAT_IMAGE_UNKNOWN);
1272
1273 switch (image->pi_type) {
1274 case PMCSTAT_IMAGE_ELF32:
1275 case PMCSTAT_IMAGE_ELF64:
1276 pmcstat_stats.ps_exec_elf++;
1277 pmcstat_process_elf_exec(pp, image, entryaddr, a);
898 break;
899
900 case PMCSTAT_IMAGE_AOUT:
1278 break;
1279
1280 case PMCSTAT_IMAGE_AOUT:
1281 pmcstat_stats.ps_exec_aout++;
1282 pmcstat_process_aout_exec(pp, image, entryaddr, a);
901 break;
902
1283 break;
1284
1285 case PMCSTAT_IMAGE_INDETERMINABLE:
1286 pmcstat_stats.ps_exec_indeterminable++;
1287 break;
1288
903 default:
904 err(EX_SOFTWARE, "ERROR: Unsupported executable type for "
1289 default:
1290 err(EX_SOFTWARE, "ERROR: Unsupported executable type for "
905 "\"%s\"", path);
1291 "\"%s\"", pmcstat_string_unintern(path));
906 }
907}
908
909
910/*
911 * Find the map entry associated with process 'p' at PC value 'pc'.
912 */
913
914static struct pmcstat_pcmap *
915pmcstat_process_find_map(struct pmcstat_process *p, uintfptr_t pc)
916{
917 struct pmcstat_pcmap *ppm;
918
1292 }
1293}
1294
1295
1296/*
1297 * Find the map entry associated with process 'p' at PC value 'pc'.
1298 */
1299
1300static struct pmcstat_pcmap *
1301pmcstat_process_find_map(struct pmcstat_process *p, uintfptr_t pc)
1302{
1303 struct pmcstat_pcmap *ppm;
1304
919 TAILQ_FOREACH(ppm, &p->pp_map, ppm_next)
920 if (pc >= ppm->ppm_lowpc && pc < ppm->ppm_highpc)
921 return ppm;
1305 TAILQ_FOREACH(ppm, &p->pp_map, ppm_next) {
1306 if (pc >= ppm->ppm_lowpc && pc < ppm->ppm_highpc)
1307 return (ppm);
1308 if (pc < ppm->ppm_lowpc)
1309 return (NULL);
1310 }
922
1311
923 return NULL;
1312 return (NULL);
924}
925
926
1313}
1314
1315
927/*
928 * Compute a 'hash' value for a string.
929 */
930
931static int
1316
1317static int
932pmcstat_string_compute_hash(const char *s)
933{
934 int hash;
935
936 for (hash = 0; *s; s++)
937 hash ^= *s;
938
939 return hash & PMCSTAT_HASH_MASK;
940}
941
942/*
943 * Intern a copy of string 's', and return a pointer to it.
944 */
945
946static const char *
947pmcstat_string_intern(const char *s)
948{
949 struct pmcstat_string *ps;
950 int hash, len;
951
952 hash = pmcstat_string_compute_hash(s);
953 len = strlen(s);
954
955 if ((ps = pmcstat_string_lookup(s)) != NULL)
956 return ps->ps_string;
957
958 if ((ps = malloc(sizeof(*ps))) == NULL)
959 err(EX_OSERR, "ERROR: Could not intern string");
960 ps->ps_len = len;
961 ps->ps_hash = hash;
962 ps->ps_string = strdup(s);
963 LIST_INSERT_HEAD(&pmcstat_string_hash[hash], ps, ps_next);
964 return ps->ps_string;
965}
966
967static struct pmcstat_string *
968pmcstat_string_lookup(const char *s)
969{
970 struct pmcstat_string *ps;
971 int hash, len;
972
973 hash = pmcstat_string_compute_hash(s);
974 len = strlen(s);
975
976 LIST_FOREACH(ps, &pmcstat_string_hash[hash], ps_next)
977 if (ps->ps_len == len && ps->ps_hash == hash &&
978 strcmp(ps->ps_string, s) == 0)
979 return ps;
980 return NULL;
981}
982
983/*
984 * Public Interfaces.
985 */
986
987/*
988 * Close a logfile, after first flushing all in-module queued data.
989 */
990
991int
992pmcstat_close_log(struct pmcstat_args *a)
993{
994 if (pmc_flush_logfile() < 0 ||
995 pmc_configure_logfile(-1) < 0)
996 err(EX_OSERR, "ERROR: logging failed");
997 a->pa_flags &= ~(FLAG_HAS_OUTPUT_LOGFILE | FLAG_HAS_PIPE);
998 return a->pa_flags & FLAG_HAS_PIPE ? PMCSTAT_EXITING :
999 PMCSTAT_FINISHED;
1000}
1001
1002
1003int
1004pmcstat_convert_log(struct pmcstat_args *a)
1005{
1006 uintfptr_t pc;
1318pmcstat_convert_log(struct pmcstat_args *a)
1319{
1320 uintfptr_t pc;
1321 pid_t pid;
1322 struct pmcstat_image *image;
1007 struct pmcstat_process *pp, *ppnew;
1008 struct pmcstat_pcmap *ppm, *ppmtmp;
1009 struct pmclog_ev ev;
1323 struct pmcstat_process *pp, *ppnew;
1324 struct pmcstat_pcmap *ppm, *ppmtmp;
1325 struct pmclog_ev ev;
1010 const char *image_path;
1326 pmcstat_interned_string image_path;
1011
1012 while (pmclog_read(a->pa_logparser, &ev) == 0) {
1013 assert(ev.pl_state == PMCLOG_OK);
1014
1015 switch (ev.pl_type) {
1327
1328 while (pmclog_read(a->pa_logparser, &ev) == 0) {
1329 assert(ev.pl_state == PMCLOG_OK);
1330
1331 switch (ev.pl_type) {
1016 case PMCLOG_TYPE_MAPPINGCHANGE:
1332 case PMCLOG_TYPE_INITIALIZE:
1333 if ((ev.pl_u.pl_i.pl_version & 0xFF000000) !=
1334 PMC_VERSION_MAJOR << 24 && a->pa_verbosity > 0)
1335 warnx("WARNING: Log version 0x%x does not "
1336 "match compiled version 0x%x.",
1337 ev.pl_u.pl_i.pl_version,
1338 PMC_VERSION_MAJOR);
1339 break;
1340 case PMCLOG_TYPE_MAP_IN:
1017 /*
1018 * Introduce an address range mapping for a
1341 /*
1342 * Introduce an address range mapping for a
1019 * process.
1343 * userland process or the kernel (pid == -1).
1344 *
1345 * We always allocate a process descriptor so
1346 * that subsequent samples seen for this
1347 * address range are mapped to the current
1348 * object being mapped in.
1020 */
1349 */
1350 pid = ev.pl_u.pl_mi.pl_pid;
1351 if (pid == -1)
1352 pp = pmcstat_kernproc;
1353 else
1354 pp = pmcstat_process_lookup(pid,
1355 PMCSTAT_ALLOCATE);
1356
1357 assert(pp != NULL);
1358
1359 image_path = pmcstat_string_intern(ev.pl_u.pl_mi.
1360 pl_pathname);
1361 image = pmcstat_image_from_path(image_path, pid == -1);
1362 if (image->pi_type == PMCSTAT_IMAGE_UNKNOWN)
1363 pmcstat_image_determine_type(image, a);
1364 if (image->pi_type != PMCSTAT_IMAGE_INDETERMINABLE)
1365 pmcstat_image_link(pp, image,
1366 ev.pl_u.pl_mi.pl_start);
1021 break;
1022
1367 break;
1368
1369 case PMCLOG_TYPE_MAP_OUT:
1370 /*
1371 * Remove an address map.
1372 */
1373 pid = ev.pl_u.pl_mo.pl_pid;
1374 if (pid == -1)
1375 pp = pmcstat_kernproc;
1376 else
1377 pp = pmcstat_process_lookup(pid, 0);
1378
1379 if (pp == NULL) /* unknown process */
1380 break;
1381
1382 pmcstat_image_unmap(pp, ev.pl_u.pl_mo.pl_start,
1383 ev.pl_u.pl_mo.pl_end);
1384 break;
1385
1023 case PMCLOG_TYPE_PCSAMPLE:
1024
1025 /*
1026 * We bring in the gmon file for the image
1027 * currently associated with the PMC & pid
1028 * pair and increment the appropriate entry
1029 * bin inside this.
1030 */
1386 case PMCLOG_TYPE_PCSAMPLE:
1387
1388 /*
1389 * We bring in the gmon file for the image
1390 * currently associated with the PMC & pid
1391 * pair and increment the appropriate entry
1392 * bin inside this.
1393 */
1394 pmcstat_stats.ps_samples_total++;
1395
1031 pc = ev.pl_u.pl_s.pl_pc;
1396 pc = ev.pl_u.pl_s.pl_pc;
1032 pp = pmcstat_process_lookup(ev.pl_u.pl_s.pl_pid, 1);
1397 pp = pmcstat_process_lookup(ev.pl_u.pl_s.pl_pid,
1398 PMCSTAT_ALLOCATE);
1033 if ((ppm = pmcstat_process_find_map(pp, pc)) == NULL &&
1034 (ppm = pmcstat_process_find_map(pmcstat_kernproc,
1399 if ((ppm = pmcstat_process_find_map(pp, pc)) == NULL &&
1400 (ppm = pmcstat_process_find_map(pmcstat_kernproc,
1035 pc)) == NULL)
1036 break; /* unknown process,offset pair */
1401 pc)) == NULL) { /* unknown process,offset pair */
1402 pmcstat_stats.ps_samples_unknown_offset++;
1403 break;
1404 }
1037
1038 pmcstat_image_increment_bucket(ppm, pc,
1039 ev.pl_u.pl_s.pl_pmcid, a);
1040
1041 break;
1042
1043 case PMCLOG_TYPE_PMCALLOCATE:
1044 /*

--- 5 unchanged lines hidden (view full) ---

1050 break;
1051
1052 case PMCLOG_TYPE_PROCEXEC:
1053
1054 /*
1055 * Change the executable image associated with
1056 * a process.
1057 */
1405
1406 pmcstat_image_increment_bucket(ppm, pc,
1407 ev.pl_u.pl_s.pl_pmcid, a);
1408
1409 break;
1410
1411 case PMCLOG_TYPE_PMCALLOCATE:
1412 /*

--- 5 unchanged lines hidden (view full) ---

1418 break;
1419
1420 case PMCLOG_TYPE_PROCEXEC:
1421
1422 /*
1423 * Change the executable image associated with
1424 * a process.
1425 */
1058 pp = pmcstat_process_lookup(ev.pl_u.pl_x.pl_pid, 1);
1426 pp = pmcstat_process_lookup(ev.pl_u.pl_x.pl_pid,
1427 PMCSTAT_ALLOCATE);
1059
1060 /* delete the current process map */
1061 TAILQ_FOREACH_SAFE(ppm, &pp->pp_map, ppm_next, ppmtmp) {
1062 TAILQ_REMOVE(&pp->pp_map, ppm, ppm_next);
1063 free(ppm);
1064 }
1065
1428
1429 /* delete the current process map */
1430 TAILQ_FOREACH_SAFE(ppm, &pp->pp_map, ppm_next, ppmtmp) {
1431 TAILQ_REMOVE(&pp->pp_map, ppm, ppm_next);
1432 free(ppm);
1433 }
1434
1066 /* locate the descriptor for the new 'base' image */
1435 /* associate this process image */
1067 image_path = pmcstat_string_intern(
1068 ev.pl_u.pl_x.pl_pathname);
1436 image_path = pmcstat_string_intern(
1437 ev.pl_u.pl_x.pl_pathname);
1069
1070 /* link to the new image */
1438 assert(image_path != NULL);
1071 pmcstat_process_exec(pp, image_path,
1439 pmcstat_process_exec(pp, image_path,
1072 ev.pl_u.pl_x.pl_entryaddr);
1440 ev.pl_u.pl_x.pl_entryaddr, a);
1073 break;
1074
1075 case PMCLOG_TYPE_PROCEXIT:
1076
1077 /*
1078 * Due to the way the log is generated, the
1079 * last few samples corresponding to a process
1080 * may appear in the log after the process
1081 * exit event is recorded. Thus we keep the
1082 * process' descriptor and associated data
1083 * structures around, but mark the process as
1084 * having exited.
1085 */
1086 pp = pmcstat_process_lookup(ev.pl_u.pl_e.pl_pid, 0);
1087 if (pp == NULL)
1088 break;
1441 break;
1442
1443 case PMCLOG_TYPE_PROCEXIT:
1444
1445 /*
1446 * Due to the way the log is generated, the
1447 * last few samples corresponding to a process
1448 * may appear in the log after the process
1449 * exit event is recorded. Thus we keep the
1450 * process' descriptor and associated data
1451 * structures around, but mark the process as
1452 * having exited.
1453 */
1454 pp = pmcstat_process_lookup(ev.pl_u.pl_e.pl_pid, 0);
1455 if (pp == NULL)
1456 break;
1089 pp->pp_isactive = 0; /* make a zombie */
1457 pp->pp_isactive = 0; /* mark as a zombie */
1090 break;
1091
1092 case PMCLOG_TYPE_SYSEXIT:
1093 pp = pmcstat_process_lookup(ev.pl_u.pl_se.pl_pid, 0);
1094 if (pp == NULL)
1095 break;
1096 pp->pp_isactive = 0; /* make a zombie */
1097 break;
1098
1099 case PMCLOG_TYPE_PROCFORK:
1100
1101 /*
1458 break;
1459
1460 case PMCLOG_TYPE_SYSEXIT:
1461 pp = pmcstat_process_lookup(ev.pl_u.pl_se.pl_pid, 0);
1462 if (pp == NULL)
1463 break;
1464 pp->pp_isactive = 0; /* make a zombie */
1465 break;
1466
1467 case PMCLOG_TYPE_PROCFORK:
1468
1469 /*
1102 * If we had been tracking 'oldpid', then clone
1103 * its pid descriptor.
1470 * Allocate a process descriptor for the new
1471 * (child) process.
1104 */
1472 */
1473 ppnew =
1474 pmcstat_process_lookup(ev.pl_u.pl_f.pl_newpid,
1475 PMCSTAT_ALLOCATE);
1476
1477 /*
1478 * If we had been tracking the parent, clone
1479 * its address maps.
1480 */
1105 pp = pmcstat_process_lookup(ev.pl_u.pl_f.pl_oldpid, 0);
1106 if (pp == NULL)
1107 break;
1481 pp = pmcstat_process_lookup(ev.pl_u.pl_f.pl_oldpid, 0);
1482 if (pp == NULL)
1483 break;
1108
1109 ppnew =
1110 pmcstat_process_lookup(ev.pl_u.pl_f.pl_newpid, 1);
1111
1112 /* copy the old process' address maps */
1113 TAILQ_FOREACH(ppm, &pp->pp_map, ppm_next)
1114 pmcstat_image_link(ppnew, ppm->ppm_image,
1484 TAILQ_FOREACH(ppm, &pp->pp_map, ppm_next)
1485 pmcstat_image_link(ppnew, ppm->ppm_image,
1115 ppm->ppm_lowpc, ppm->ppm_highpc);
1486 ppm->ppm_lowpc);
1116 break;
1117
1118 default: /* other types of entries are not relevant */
1119 break;
1120 }
1121 }
1122
1123 if (ev.pl_state == PMCLOG_EOF)
1487 break;
1488
1489 default: /* other types of entries are not relevant */
1490 break;
1491 }
1492 }
1493
1494 if (ev.pl_state == PMCLOG_EOF)
1124 return PMCSTAT_FINISHED;
1495 return (PMCSTAT_FINISHED);
1125 else if (ev.pl_state == PMCLOG_REQUIRE_DATA)
1496 else if (ev.pl_state == PMCLOG_REQUIRE_DATA)
1126 return PMCSTAT_RUNNING;
1497 return (PMCSTAT_RUNNING);
1127
1128 err(EX_DATAERR, "ERROR: event parsing failed (record %jd, "
1129 "offset 0x%jx)", (uintmax_t) ev.pl_count + 1, ev.pl_offset);
1130}
1131
1498
1499 err(EX_DATAERR, "ERROR: event parsing failed (record %jd, "
1500 "offset 0x%jx)", (uintmax_t) ev.pl_count + 1, ev.pl_offset);
1501}
1502
1132
1133/*
1503/*
1134 * Open a log file, for reading or writing.
1135 *
1136 * The function returns the fd of a successfully opened log or -1 in
1137 * case of failure.
1138 */
1139
1140int
1141pmcstat_open(const char *path, int mode)
1142{
1143 int fd;
1144
1145 /*
1146 * If 'path' is "-" then open one of stdin or stdout depending
1147 * on the value of 'mode'. Otherwise, treat 'path' as a file
1148 * name and open that.
1149 */
1150 if (path[0] == '-' && path[1] == '\0')
1151 fd = (mode == PMCSTAT_OPEN_FOR_READ) ? 0 : 1;
1152 else
1153 fd = open(path, mode == PMCSTAT_OPEN_FOR_READ ?
1154 O_RDONLY : (O_WRONLY|O_CREAT|O_TRUNC),
1155 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
1156
1157 return fd;
1158}
1159
1160/*
1161 * Print log entries as text.
1162 */
1163
1504 * Print log entries as text.
1505 */
1506
1164int
1507static int
1165pmcstat_print_log(struct pmcstat_args *a)
1166{
1167 struct pmclog_ev ev;
1168
1169 while (pmclog_read(a->pa_logparser, &ev) == 0) {
1170 assert(ev.pl_state == PMCLOG_OK);
1171 switch (ev.pl_type) {
1172 case PMCLOG_TYPE_CLOSELOG:
1173 PMCSTAT_PRINT_ENTRY(a,"closelog",);
1174 break;
1175 case PMCLOG_TYPE_DROPNOTIFY:
1176 PMCSTAT_PRINT_ENTRY(a,"drop",);
1177 break;
1178 case PMCLOG_TYPE_INITIALIZE:
1179 PMCSTAT_PRINT_ENTRY(a,"initlog","0x%x \"%s\"",
1180 ev.pl_u.pl_i.pl_version,
1181 pmc_name_of_cputype(ev.pl_u.pl_i.pl_arch));
1182 break;
1508pmcstat_print_log(struct pmcstat_args *a)
1509{
1510 struct pmclog_ev ev;
1511
1512 while (pmclog_read(a->pa_logparser, &ev) == 0) {
1513 assert(ev.pl_state == PMCLOG_OK);
1514 switch (ev.pl_type) {
1515 case PMCLOG_TYPE_CLOSELOG:
1516 PMCSTAT_PRINT_ENTRY(a,"closelog",);
1517 break;
1518 case PMCLOG_TYPE_DROPNOTIFY:
1519 PMCSTAT_PRINT_ENTRY(a,"drop",);
1520 break;
1521 case PMCLOG_TYPE_INITIALIZE:
1522 PMCSTAT_PRINT_ENTRY(a,"initlog","0x%x \"%s\"",
1523 ev.pl_u.pl_i.pl_version,
1524 pmc_name_of_cputype(ev.pl_u.pl_i.pl_arch));
1525 break;
1183 case PMCLOG_TYPE_MAPPINGCHANGE:
1184 PMCSTAT_PRINT_ENTRY(a,"mapping","%s %d %p %p \"%s\"",
1185 ev.pl_u.pl_m.pl_type == PMCLOG_MAPPING_INSERT ?
1186 "insert" : "delete",
1187 ev.pl_u.pl_m.pl_pid,
1188 (void *) ev.pl_u.pl_m.pl_start,
1189 (void *) ev.pl_u.pl_m.pl_end,
1190 ev.pl_u.pl_m.pl_pathname);
1526 case PMCLOG_TYPE_MAP_IN:
1527 PMCSTAT_PRINT_ENTRY(a,"map-in","%d %p \"%s\"",
1528 ev.pl_u.pl_mi.pl_pid,
1529 (void *) ev.pl_u.pl_mi.pl_start,
1530 ev.pl_u.pl_mi.pl_pathname);
1191 break;
1531 break;
1532 case PMCLOG_TYPE_MAP_OUT:
1533 PMCSTAT_PRINT_ENTRY(a,"map-out","%d %p %p",
1534 ev.pl_u.pl_mo.pl_pid,
1535 (void *) ev.pl_u.pl_mo.pl_start,
1536 (void *) ev.pl_u.pl_mo.pl_end);
1537 break;
1192 case PMCLOG_TYPE_PCSAMPLE:
1193 PMCSTAT_PRINT_ENTRY(a,"sample","0x%x %d %p %c",
1194 ev.pl_u.pl_s.pl_pmcid,
1195 ev.pl_u.pl_s.pl_pid,
1196 (void *) ev.pl_u.pl_s.pl_pc,
1197 ev.pl_u.pl_s.pl_usermode ? 'u' : 's');
1198 break;
1199 case PMCLOG_TYPE_PMCALLOCATE:

--- 47 unchanged lines hidden (view full) ---

1247 break;
1248 default:
1249 fprintf(a->pa_printfile, "unknown %d",
1250 ev.pl_type);
1251 }
1252 }
1253
1254 if (ev.pl_state == PMCLOG_EOF)
1538 case PMCLOG_TYPE_PCSAMPLE:
1539 PMCSTAT_PRINT_ENTRY(a,"sample","0x%x %d %p %c",
1540 ev.pl_u.pl_s.pl_pmcid,
1541 ev.pl_u.pl_s.pl_pid,
1542 (void *) ev.pl_u.pl_s.pl_pc,
1543 ev.pl_u.pl_s.pl_usermode ? 'u' : 's');
1544 break;
1545 case PMCLOG_TYPE_PMCALLOCATE:

--- 47 unchanged lines hidden (view full) ---

1593 break;
1594 default:
1595 fprintf(a->pa_printfile, "unknown %d",
1596 ev.pl_type);
1597 }
1598 }
1599
1600 if (ev.pl_state == PMCLOG_EOF)
1255 return PMCSTAT_FINISHED;
1601 return (PMCSTAT_FINISHED);
1256 else if (ev.pl_state == PMCLOG_REQUIRE_DATA)
1602 else if (ev.pl_state == PMCLOG_REQUIRE_DATA)
1257 return PMCSTAT_RUNNING;
1603 return (PMCSTAT_RUNNING);
1258
1259 err(EX_DATAERR, "ERROR: event parsing failed "
1260 "(record %jd, offset 0x%jx)",
1261 (uintmax_t) ev.pl_count + 1, ev.pl_offset);
1262 /*NOTREACHED*/
1263}
1264
1265/*
1604
1605 err(EX_DATAERR, "ERROR: event parsing failed "
1606 "(record %jd, offset 0x%jx)",
1607 (uintmax_t) ev.pl_count + 1, ev.pl_offset);
1608 /*NOTREACHED*/
1609}
1610
1611/*
1612 * Public Interfaces.
1613 */
1614
1615/*
1616 * Close a logfile, after first flushing all in-module queued data.
1617 */
1618
1619int
1620pmcstat_close_log(struct pmcstat_args *a)
1621{
1622 if (pmc_flush_logfile() < 0 ||
1623 pmc_configure_logfile(-1) < 0)
1624 err(EX_OSERR, "ERROR: logging failed");
1625 a->pa_flags &= ~(FLAG_HAS_OUTPUT_LOGFILE | FLAG_HAS_PIPE);
1626 return (a->pa_flags & FLAG_HAS_PIPE ? PMCSTAT_EXITING :
1627 PMCSTAT_FINISHED);
1628}
1629
1630
1631
1632/*
1633 * Open a log file, for reading or writing.
1634 *
1635 * The function returns the fd of a successfully opened log or -1 in
1636 * case of failure.
1637 */
1638
1639int
1640pmcstat_open_log(const char *path, int mode)
1641{
1642 int fd;
1643
1644 /*
1645 * If 'path' is "-" then open one of stdin or stdout depending
1646 * on the value of 'mode'. Otherwise, treat 'path' as a file
1647 * name and open that.
1648 */
1649 if (path[0] == '-' && path[1] == '\0')
1650 fd = (mode == PMCSTAT_OPEN_FOR_READ) ? 0 : 1;
1651 else
1652 fd = open(path, mode == PMCSTAT_OPEN_FOR_READ ?
1653 O_RDONLY : (O_WRONLY|O_CREAT|O_TRUNC),
1654 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
1655
1656 return (fd);
1657}
1658
1659/*
1266 * Process a log file in offline analysis mode.
1267 */
1268
1269int
1270pmcstat_process_log(struct pmcstat_args *a)
1271{
1272
1273 /*
1274 * If gprof style profiles haven't been asked for, just print the
1275 * log to the current output file.
1276 */
1277 if (a->pa_flags & FLAG_DO_PRINT)
1660 * Process a log file in offline analysis mode.
1661 */
1662
1663int
1664pmcstat_process_log(struct pmcstat_args *a)
1665{
1666
1667 /*
1668 * If gprof style profiles haven't been asked for, just print the
1669 * log to the current output file.
1670 */
1671 if (a->pa_flags & FLAG_DO_PRINT)
1278 return pmcstat_print_log(a);
1672 return (pmcstat_print_log(a));
1279 else
1280 /* convert the log to gprof compatible profiles */
1673 else
1674 /* convert the log to gprof compatible profiles */
1281 return pmcstat_convert_log(a);
1675 return (pmcstat_convert_log(a));
1282}
1283
1676}
1677
1678/*
1679 * Initialize module.
1680 */
1681
1284void
1285pmcstat_initialize_logging(struct pmcstat_args *a)
1286{
1287 int i;
1682void
1683pmcstat_initialize_logging(struct pmcstat_args *a)
1684{
1685 int i;
1288 const char *kernpath;
1289 struct pmcstat_image *img;
1290
1686
1687 (void) a;
1688
1291 /* use a convenient format for 'ldd' output */
1292 if (setenv("LD_TRACE_LOADED_OBJECTS_FMT1","%o \"%p\" %x\n",1) != 0)
1689 /* use a convenient format for 'ldd' output */
1690 if (setenv("LD_TRACE_LOADED_OBJECTS_FMT1","%o \"%p\" %x\n",1) != 0)
1293 goto error;
1691 err(EX_OSERR, "ERROR: Cannot setenv");
1294
1295 /* Initialize hash tables */
1692
1693 /* Initialize hash tables */
1694 pmcstat_string_initialize();
1296 for (i = 0; i < PMCSTAT_NHASH; i++) {
1297 LIST_INIT(&pmcstat_image_hash[i]);
1298 LIST_INIT(&pmcstat_process_hash[i]);
1695 for (i = 0; i < PMCSTAT_NHASH; i++) {
1696 LIST_INIT(&pmcstat_image_hash[i]);
1697 LIST_INIT(&pmcstat_process_hash[i]);
1299 LIST_INIT(&pmcstat_string_hash[i]);
1300 }
1301
1698 }
1699
1302 /* create a fake 'process' entry for the kernel with pid == -1 */
1303 if ((pmcstat_kernproc = pmcstat_process_lookup((pid_t) -1, 1)) == NULL)
1304 goto error;
1305
1306 if ((kernpath = pmcstat_string_intern(a->pa_kernel)) == NULL)
1307 goto error;
1308
1309 img = pmcstat_image_from_path(kernpath);
1310
1311 pmcstat_image_get_elf_params(img);
1312 pmcstat_image_link(pmcstat_kernproc, img, img->pi_start, img->pi_end);
1313
1314 return;
1315
1316 error:
1317 err(EX_OSERR, "ERROR: Cannot initialize logging");
1700 /*
1701 * Create a fake 'process' entry for the kernel with pid -1.
1702 * hwpmc(4) will subsequently inform us about where the kernel
1703 * and any loaded kernel modules are mapped.
1704 */
1705 if ((pmcstat_kernproc = pmcstat_process_lookup((pid_t) -1,
1706 PMCSTAT_ALLOCATE)) == NULL)
1707 err(EX_OSERR, "ERROR: Cannot initialize logging");
1318}
1319
1708}
1709
1710/*
1711 * Shutdown module.
1712 */
1713
1320void
1714void
1321pmcstat_shutdown_logging(void)
1715pmcstat_shutdown_logging(struct pmcstat_args *a)
1322{
1323 int i;
1716{
1717 int i;
1718 FILE *mf;
1324 struct pmcstat_gmonfile *pgf, *pgftmp;
1325 struct pmcstat_image *pi, *pitmp;
1326 struct pmcstat_process *pp, *pptmp;
1719 struct pmcstat_gmonfile *pgf, *pgftmp;
1720 struct pmcstat_image *pi, *pitmp;
1721 struct pmcstat_process *pp, *pptmp;
1327 struct pmcstat_string *ps, *pstmp;
1328
1722
1723 /* determine where to send the map file */
1724 mf = NULL;
1725 if (a->pa_mapfilename != NULL)
1726 mf = (strcmp(a->pa_mapfilename, "-") == 0) ?
1727 a->pa_printfile : fopen(a->pa_mapfilename, "w");
1728
1729 if (mf == NULL && a->pa_flags & FLAG_DO_GPROF &&
1730 a->pa_verbosity >= 2)
1731 mf = a->pa_printfile;
1732
1733 if (mf)
1734 (void) fprintf(mf, "MAP:\n");
1735
1329 for (i = 0; i < PMCSTAT_NHASH; i++) {
1330 LIST_FOREACH_SAFE(pi, &pmcstat_image_hash[i], pi_next, pitmp) {
1331 /* flush gmon.out data to disk */
1332 LIST_FOREACH_SAFE(pgf, &pi->pi_gmlist, pgf_next,
1333 pgftmp) {
1736 for (i = 0; i < PMCSTAT_NHASH; i++) {
1737 LIST_FOREACH_SAFE(pi, &pmcstat_image_hash[i], pi_next, pitmp) {
1738 /* flush gmon.out data to disk */
1739 LIST_FOREACH_SAFE(pgf, &pi->pi_gmlist, pgf_next,
1740 pgftmp) {
1334 pmcstat_gmon_unmap_file(pgf);
1335 LIST_REMOVE(pgf, pgf_next);
1336 free(pgf);
1741 pmcstat_gmon_unmap_file(pgf);
1742 LIST_REMOVE(pgf, pgf_next);
1743
1744 if (pgf->pgf_overflow && a->pa_verbosity >= 1)
1745 warnx("WARNING: profile \"%s\" "
1746 "overflowed.",
1747 pmcstat_string_unintern(pgf->pgf_name));
1748 free(pgf);
1337 }
1749 }
1750 if (mf)
1751 (void) fprintf(mf, " \"%s\" -> \"%s\"\n",
1752 pmcstat_string_unintern(pi->pi_execpath),
1753 pmcstat_string_unintern(pi->pi_samplename));
1338
1339 LIST_REMOVE(pi, pi_next);
1340 free(pi);
1341 }
1342 LIST_FOREACH_SAFE(pp, &pmcstat_process_hash[i], pp_next,
1343 pptmp) {
1344 LIST_REMOVE(pp, pp_next);
1345 free(pp);
1346 }
1754
1755 LIST_REMOVE(pi, pi_next);
1756 free(pi);
1757 }
1758 LIST_FOREACH_SAFE(pp, &pmcstat_process_hash[i], pp_next,
1759 pptmp) {
1760 LIST_REMOVE(pp, pp_next);
1761 free(pp);
1762 }
1347 LIST_FOREACH_SAFE(ps, &pmcstat_string_hash[i], ps_next,
1348 pstmp) {
1349 LIST_REMOVE(ps, ps_next);
1350 free(ps);
1351 }
1352 }
1763 }
1764
1765 pmcstat_string_shutdown();
1766
1767 /*
1768 * Print errors unless -q was specified. Print all statistics
1769 * if verbosity > 1.
1770 */
1771#define PRINT(N,V,A) do { \
1772 if (pmcstat_stats.ps_##V || (A)->pa_verbosity >= 2) \
1773 (void) fprintf((A)->pa_printfile, " %-40s %d\n",\
1774 N, pmcstat_stats.ps_##V); \
1775 } while (0)
1776
1777 if (a->pa_verbosity >= 1 && a->pa_flags & FLAG_DO_GPROF) {
1778 (void) fprintf(a->pa_printfile, "CONVERSION STATISTICS:\n");
1779 PRINT("#exec/a.out", exec_aout, a);
1780 PRINT("#exec/elf", exec_elf, a);
1781 PRINT("#exec/unknown", exec_indeterminable, a);
1782 PRINT("#exec handling errors", exec_errors, a);
1783 PRINT("#samples/total", samples_total, a);
1784 PRINT("#samples/unclaimed", samples_unknown_offset, a);
1785 PRINT("#samples/unknown-object", samples_indeterminable, a);
1786 }
1787
1788 if (mf)
1789 (void) fclose(mf);
1353}
1790}