2 * Copyright (c) 2013 Google, Inc
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 /* Decode and dump U-Boot profiling information */
31 #include <sys/param.h>
36 #define MAX_LINE_LEN 500
39 FUNCF_TRACE = 1 << 0, /* Include this function in trace */
45 unsigned long code_size;
46 unsigned long call_count;
48 /* the section this function is in */
49 struct objsection_info *objsection;
52 enum trace_line_type {
57 struct trace_configline_info {
58 struct trace_configline_info *next;
59 enum trace_line_type type;
60 const char *name; /* identifier name / wildcard */
61 regex_t regex; /* Regex to use if name starts with / */
64 /* The contents of the trace config file */
65 struct trace_configline_info *trace_config_head;
67 struct func_info *func_list;
69 struct trace_call *call_list;
71 int verbose; /* Verbosity level 0=none, 1=warn, 2=notice, 3=info, 4=debug */
72 unsigned long text_offset; /* text address of first function */
74 static void outf(int level, const char *fmt, ...)
75 __attribute__ ((format (__printf__, 2, 3)));
76 #define error(fmt, b...) outf(0, fmt, ##b)
77 #define warn(fmt, b...) outf(1, fmt, ##b)
78 #define notice(fmt, b...) outf(2, fmt, ##b)
79 #define info(fmt, b...) outf(3, fmt, ##b)
80 #define debug(fmt, b...) outf(4, fmt, ##b)
83 static void outf(int level, const char *fmt, ...)
85 if (verbose >= level) {
89 vfprintf(stderr, fmt, args);
94 static void usage(void)
97 "Usage: proftool -cds -v3 <cmd> <profdata>\n"
100 " dump-ftrace\t\tDump out textual data in ftrace format\n"
103 " -m <map>\tSpecify Systen.map file\n"
104 " -t <trace>\tSpecific trace data file (from U-Boot)\n"
105 " -v <0-4>\tSpecify verbosity\n");
109 static int h_cmp_offset(const void *v1, const void *v2)
111 const struct func_info *f1 = v1, *f2 = v2;
113 return (f1->offset / FUNC_SITE_SIZE) - (f2->offset / FUNC_SITE_SIZE);
116 static int read_system_map(FILE *fin)
118 unsigned long offset, start = 0;
119 struct func_info *func;
120 char buff[MAX_LINE_LEN];
122 char symname[MAX_LINE_LEN + 1];
126 for (linenum = 1, alloced = func_count = 0;; linenum++) {
129 if (fgets(buff, sizeof(buff), fin))
130 fields = sscanf(buff, "%lx %c %100s\n", &offset,
134 } else if (feof(fin)) {
136 } else if (fields < 2) {
137 error("Map file line %d: invalid format\n", linenum);
141 /* Must be a text symbol */
142 symtype = tolower(symtype);
143 if (symtype != 't' && symtype != 'w')
146 if (func_count == alloced) {
148 func_list = realloc(func_list,
149 sizeof(struct func_info) * alloced);
155 func = &func_list[func_count++];
156 memset(func, '\0', sizeof(*func));
157 func->offset = offset - start;
158 func->name = strdup(symname);
159 func->flags = FUNCF_TRACE; /* trace by default */
161 /* Update previous function's code size */
163 func[-1].code_size = func->offset - func[-1].offset;
165 notice("%d functions found in map file\n", func_count);
170 static int read_data(FILE *fin, void *buff, int size)
174 err = fread(buff, 1, size, fin);
178 error("Cannot read profile file at pos %ld\n", ftell(fin));
184 static struct func_info *find_func_by_offset(uint32_t offset)
186 struct func_info key, *found;
189 found = bsearch(&key, func_list, func_count, sizeof(struct func_info),
195 /* This finds the function which contains the given offset */
196 static struct func_info *find_caller_by_offset(uint32_t offset)
198 int low; /* least function that could be a match */
199 int high; /* greated function that could be a match */
200 struct func_info key;
203 high = func_count - 1;
205 while (high > low + 1) {
206 int mid = (low + high) / 2;
209 result = h_cmp_offset(&key, &func_list[mid]);
215 return &func_list[mid];
218 return low >= 0 ? &func_list[low] : NULL;
221 static int read_calls(FILE *fin, int count)
223 struct trace_call *call_data;
226 notice("call count: %d\n", count);
227 call_list = (struct trace_call *)calloc(count, sizeof(*call_data));
229 error("Cannot allocate call_list\n");
234 call_data = call_list;
235 for (i = 0; i < count; i++, call_data++) {
236 if (read_data(fin, call_data, sizeof(*call_data)))
242 static int read_profile(FILE *fin, int *not_found)
244 struct trace_output_hdr hdr;
250 err = read_data(fin, &hdr, sizeof(hdr));
257 case TRACE_CHUNK_FUNCS:
258 /* Ignored at present */
261 case TRACE_CHUNK_CALLS:
262 if (read_calls(fin, hdr.rec_count))
270 static int read_map_file(const char *fname)
275 fmap = fopen(fname, "r");
277 error("Cannot open map file '%s'\n", fname);
281 err = read_system_map(fmap);
287 static int read_profile_file(const char *fname)
289 int not_found = INT_MAX;
293 fprof = fopen(fname, "rb");
295 error("Cannot open profile data file '%s'\n",
299 err = read_profile(fprof, ¬_found);
305 warn("%d profile functions could not be found in the map file - are you sure that your profile data and map file correspond?\n",
313 static int regex_report_error(regex_t *regex, int err, const char *op,
318 regerror(err, regex, buf, sizeof(buf));
319 error("Regex error '%s' in %s '%s'\n", buf, op, name);
323 static void check_trace_config_line(struct trace_configline_info *item)
325 struct func_info *func, *end;
328 debug("Checking trace config line '%s'\n", item->name);
329 for (func = func_list, end = func + func_count; func < end; func++) {
330 err = regexec(&item->regex, func->name, 0, NULL, 0);
331 debug(" - regex '%s', string '%s': %d\n", item->name,
333 if (err == REG_NOMATCH)
336 if (err != REG_NOERROR) {
337 regex_report_error(&item->regex, err, "match",
342 /* It matches, so perform the action */
343 switch (item->type) {
344 case TRACE_LINE_INCLUDE:
345 info(" include %s at %lx\n", func->name,
346 text_offset + func->offset);
347 func->flags |= FUNCF_TRACE;
350 case TRACE_LINE_EXCLUDE:
351 info(" exclude %s at %lx\n", func->name,
352 text_offset + func->offset);
353 func->flags &= ~FUNCF_TRACE;
359 static void check_trace_config(void)
361 struct trace_configline_info *line;
363 for (line = trace_config_head; line; line = line->next)
364 check_trace_config_line(line);
368 * Check the functions to see if they each have an objsection. If not, then
369 * the linker must have eliminated them.
371 static void check_functions(void)
373 struct func_info *func, *end;
374 unsigned long removed_code_size = 0;
377 /* Look for missing functions */
378 for (func = func_list, end = func + func_count; func < end; func++) {
379 if (!func->objsection) {
380 removed_code_size += func->code_size;
385 /* Figure out what functions we want to trace */
386 check_trace_config();
388 warn("%d functions removed by linker, %ld code size\n",
389 not_found, removed_code_size);
392 static int read_trace_config(FILE *fin)
396 struct trace_configline_info **tailp = &trace_config_head;
398 while (fgets(buff, sizeof(buff), fin)) {
399 int len = strlen(buff);
400 struct trace_configline_info *line;
406 if (len && buff[len - 1] == '\n')
407 buff[len - 1] = '\0';
409 /* skip blank lines and comments */
410 for (s = buff; *s == ' ' || *s == '\t'; s++)
412 if (!*s || *s == '#')
415 line = (struct trace_configline_info *)calloc(1,
418 error("Cannot allocate config line\n");
422 tok = strtok_r(s, " \t", &saveptr);
424 error("Invalid trace config data on line %d\n",
428 if (0 == strcmp(tok, "include-func")) {
429 line->type = TRACE_LINE_INCLUDE;
430 } else if (0 == strcmp(tok, "exclude-func")) {
431 line->type = TRACE_LINE_EXCLUDE;
433 error("Unknown command in trace config data line %d\n",
438 tok = strtok_r(NULL, " \t", &saveptr);
440 error("Missing pattern in trace config data line %d\n",
445 err = regcomp(&line->regex, tok, REG_NOSUB);
448 return regex_report_error(&line->regex, err, "compile",
452 /* link this new one to the end of the list */
453 line->name = strdup(tok);
460 error("Cannot read from trace config file at position %ld\n",
467 static int read_trace_config_file(const char *fname)
472 fin = fopen(fname, "r");
474 error("Cannot open trace_config file '%s'\n", fname);
477 err = read_trace_config(fin);
482 static void out_func(ulong func_offset, int is_caller, const char *suffix)
484 struct func_info *func;
486 func = (is_caller ? find_caller_by_offset : find_func_by_offset)
490 printf("%s%s", func->name, suffix);
492 printf("%lx%s", func_offset, suffix);
498 * # TASK-PID CPU# TIMESTAMP FUNCTION
500 * # bash-4251 [01] 10152.583854: path_put <-path_walk
501 * # bash-4251 [01] 10152.583855: dput <-path_put
502 * # bash-4251 [01] 10152.583855: _atomic_dec_and_lock <-dput
504 static int make_ftrace(void)
506 struct trace_call *call;
507 int missing_count = 0, skip_count = 0;
510 printf("# tracer: ftrace\n"
512 "# TASK-PID CPU# TIMESTAMP FUNCTION\n"
514 for (i = 0, call = call_list; i < call_count; i++, call++) {
515 struct func_info *func = find_func_by_offset(call->func);
516 ulong time = call->flags & FUNCF_TIMESTAMP_MASK;
518 if (TRACE_CALL_TYPE(call) != FUNCF_ENTRY &&
519 TRACE_CALL_TYPE(call) != FUNCF_EXIT)
522 warn("Cannot find function at %lx\n",
523 text_offset + call->func);
528 if (!(func->flags & FUNCF_TRACE)) {
529 debug("Funcion '%s' is excluded from trace\n",
535 printf("%16s-%-5d [01] %lu.%06lu: ", "uboot", 1,
536 time / 1000000, time % 1000000);
538 out_func(call->func, 0, " <- ");
539 out_func(call->caller, 1, "\n");
541 info("ftrace: %d functions not found, %d excluded\n", missing_count,
547 static int prof_tool(int argc, char * const argv[],
548 const char *prof_fname, const char *map_fname,
549 const char *trace_config_fname)
553 if (read_map_file(map_fname))
555 if (prof_fname && read_profile_file(prof_fname))
557 if (trace_config_fname && read_trace_config_file(trace_config_fname))
562 for (; argc; argc--, argv++) {
563 const char *cmd = *argv;
565 if (0 == strcmp(cmd, "dump-ftrace"))
568 warn("Unknown command '%s'\n", cmd);
574 int main(int argc, char *argv[])
576 const char *map_fname = "System.map";
577 const char *prof_fname = NULL;
578 const char *trace_config_fname = NULL;
582 while ((opt = getopt(argc, argv, "m:p:t:v:")) != -1) {
593 trace_config_fname = optarg;
597 verbose = atoi(optarg);
604 argc -= optind; argv += optind;
608 debug("Debug enabled\n");
609 return prof_tool(argc, argv, prof_fname, map_fname,