2 * Copyright (c) 2002 Jake Burkholder
3 * Copyright (c) 2004 Robert Watson
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/usr.bin/ktrdump/ktrdump.c,v 1.10 2005/05/21 09:55:06 ru Exp $
30 #include <sys/types.h>
34 #include <sys/queue.h>
52 struct ktr_entry *ents;
55 int beg_idx; /* Beginning index */
56 int end_idx; /* Ending index */
59 static struct nlist nl1[] = {
60 { .n_name = "_ktr_version" },
61 { .n_name = "_ktr_entries" },
62 { .n_name = "_ncpus" },
66 static struct nlist nl2[] = {
67 { .n_name = "_tsc_frequency" },
71 static struct nlist nl_version_ktr_idx[] = {
72 { .n_name = "_ktr_idx" },
73 { .n_name = "_ktr_buf" },
77 static struct nlist nl_version_ktr_cpu[] = {
78 { .n_name = "_ktr_cpu" },
84 const void *save_kptr;
87 typedef void (*ktr_iter_cb_t)(void *, int, int, struct ktr_entry *, uint64_t *);
90 /* defined according to the x86_64 ABI spec */
92 uint32_t gp_offset; /* offset to next available gpr in reg_save_area */
93 uint32_t fp_offset; /* offset to next available fpr in reg_save_area */
94 void *overflow_arg_area; /* args that are passed on the stack */
95 struct reg_save_area *reg_save_area; /* register args */
97 * NOT part of the ABI. ->overflow_arg_area gets advanced when code
98 * iterates over the arguments with va_arg(). That means we need to
99 * keep a copy in order to free the allocated memory (if any)
101 void *overflow_arg_area_save;
102 } __attribute__((packed));
104 typedef struct my_va_list *machine_va_list;
106 struct reg_save_area {
107 uint64_t rdi, rsi, rdx, rcx, r8, r9;
108 /* XMM registers follow, but we don't use them */
126 static double tsc_frequency;
127 static double correction_factor = 0.0;
129 static char corefile[PATH_MAX];
130 static char execfile[PATH_MAX];
132 static char errbuf[_POSIX2_LINE_MAX];
135 static int entries_per_buf;
136 static int fifo_mask;
137 static int ktr_version;
139 static void usage(void);
140 static int earliest_ts(struct ktr_buffer *);
141 static void dump_machine_info(evtr_t);
142 static void dump_device_info(evtr_t);
143 static void print_header(FILE *, int);
144 static void print_entry(FILE *, int, int, struct ktr_entry *, u_int64_t *);
145 static void print_callback(void *, int, int, struct ktr_entry *, uint64_t *);
146 static void dump_callback(void *, int, int, struct ktr_entry *, uint64_t *);
147 static struct ktr_info *kvm_ktrinfo(void *, struct save_ctx *);
148 static const char *kvm_string(const char *, struct save_ctx *);
149 static const char *trunc_path(const char *, int);
150 static void read_symbols(const char *);
151 static const char *address_to_symbol(void *, struct save_ctx *);
152 static struct ktr_buffer *ktr_bufs_init(void);
153 static void get_indices(struct ktr_entry **, int *);
154 static void load_bufs(struct ktr_buffer *, struct ktr_entry **, int *);
155 static void iterate_buf(FILE *, struct ktr_buffer *, int, u_int64_t *, ktr_iter_cb_t);
156 static void iterate_bufs_timesorted(FILE *, struct ktr_buffer *, u_int64_t *, ktr_iter_cb_t);
157 static void kvmfprintf(FILE *fp, const char *ctl, va_list va);
158 static int va_list_from_blob(machine_va_list *valist, const char *fmt, char *blob, size_t blobsize);
159 static void va_list_cleanup(machine_va_list *valist);
161 * Reads the ktr trace buffer from kernel memory and prints the trace entries.
164 main(int ac, char **av)
166 struct ktr_buffer *ktr_bufs;
167 struct ktr_entry **ktr_kbuf;
168 ktr_iter_cb_t callback = &print_callback;
173 int *ktr_start_index;
178 * Parse commandline arguments.
181 while ((c = getopt(ac, av, "acfinqrtxpslA:N:M:o:d")) != -1) {
197 callback = &dump_callback;
200 if (strlcpy(execfile, optarg, sizeof(execfile))
202 errx(1, "%s: File name too long", optarg);
215 correction_factor = strtod(optarg, NULL);
218 if (strlcpy(corefile, optarg, sizeof(corefile))
220 errx(1, "%s: File name too long", optarg);
227 if ((fo = fopen(optarg, "w")) == NULL)
228 err(1, "%s", optarg);
240 sflag = 1; /* sort across the cpus */
255 ctx = evtr_open_write(fo);
257 err(1, "Can't create event stream");
260 if (cflag + iflag + tflag + xflag + fflag + pflag == 0) {
266 if (correction_factor != 0.0 && (rflag == 0 || nflag)) {
267 fprintf(stderr, "Correction factor can only be applied with -r and without -n\n");
276 * Open our execfile and corefile, resolve needed symbols and read in
279 if ((kd = kvm_openfiles(Nflag ? execfile : NULL,
280 Mflag ? corefile : NULL, NULL, O_RDONLY, errbuf)) == NULL)
281 errx(1, "%s", errbuf);
282 if (kvm_nlist(kd, nl1) != 0)
283 errx(1, "%s", kvm_geterr(kd));
284 if (kvm_read(kd, nl1[0].n_value, &ktr_version, sizeof(ktr_version)) == -1)
285 errx(1, "%s", kvm_geterr(kd));
286 if (kvm_read(kd, nl1[2].n_value, &ncpus, sizeof(ncpus)) == -1)
287 errx(1, "%s", kvm_geterr(kd));
288 ktr_start_index = malloc(sizeof(*ktr_start_index) * ncpus);
289 if (ktr_version >= KTR_VERSION_WITH_FREQ && kvm_nlist(kd, nl2) == 0) {
290 if (kvm_read(kd, nl2[0].n_value, &tts, sizeof(tts)) == -1)
291 errx(1, "%s", kvm_geterr(kd));
292 tsc_frequency = (double)tts;
294 if (ktr_version > KTR_VERSION)
295 errx(1, "ktr version too high for us to handle");
296 if (kvm_read(kd, nl1[1].n_value, &entries_per_buf,
297 sizeof(entries_per_buf)) == -1)
298 errx(1, "%s", kvm_geterr(kd));
299 fifo_mask = entries_per_buf - 1;
301 printf("TSC frequency is %6.3f MHz\n", tsc_frequency / 1000000.0);
304 dump_machine_info((evtr_t)ctx);
305 dump_device_info((evtr_t)ctx);
307 ktr_kbuf = calloc(ncpus, sizeof(*ktr_kbuf));
308 ktr_idx = calloc(ncpus, sizeof(*ktr_idx));
311 read_symbols(Nflag ? execfile : NULL);
313 if (ktr_version < KTR_VERSION_KTR_CPU) {
314 if (kvm_nlist(kd, nl_version_ktr_idx))
315 errx(1, "%s", kvm_geterr(kd));
317 if (kvm_nlist(kd, nl_version_ktr_cpu))
318 errx(1, "%s", kvm_geterr(kd));
321 get_indices(ktr_kbuf, ktr_idx);
323 ktr_bufs = ktr_bufs_init();
326 u_int64_t last_timestamp = 0;
328 load_bufs(ktr_bufs, ktr_kbuf, ktr_idx);
329 iterate_bufs_timesorted(ctx, ktr_bufs, &last_timestamp,
332 usleep(1000000 / 10);
335 u_int64_t *last_timestamp = calloc(sizeof(u_int64_t), ncpus);
337 load_bufs(ktr_bufs, ktr_kbuf, ktr_idx);
338 for (n = 0; n < ncpus; ++n)
339 iterate_buf(ctx, ktr_bufs, n, &last_timestamp[n],
342 usleep(1000000 / 10);
352 dump_devinfo(struct devinfo_dev *dev, void *arg)
354 struct evtr_event ev;
355 evtr_t evtr = (evtr_t)arg;
356 const char *fmt = "#devicenames[\"%s\"] = %#lx";
357 char fmtdatabuf[sizeof(char *) + sizeof(devinfo_handle_t)];
358 char *fmtdata = fmtdatabuf;
360 if (!dev->dd_name[0])
362 ev.type = EVTR_TYPE_PROBE;
369 ((char **)fmtdata)[0] = &dev->dd_name[0];
370 fmtdata += sizeof(char *);
371 ((devinfo_handle_t *)fmtdata)[0] = dev->dd_handle;
372 ev.fmtdata = fmtdatabuf;
373 ev.fmtdatalen = sizeof(fmtdatabuf);
375 if (evtr_dump_event(evtr, &ev)) {
376 err(1, "%s", evtr_errmsg(evtr));
379 return devinfo_foreach_device_child(dev, dump_devinfo, evtr);
384 dump_device_info(evtr_t evtr)
386 struct devinfo_dev *root;
389 if (!(root = devinfo_handle_to_device(DEVINFO_ROOT_DEVICE))) {
390 warn("can't find root device");
393 devinfo_foreach_device_child(root, dump_devinfo, evtr);
398 dump_machine_info(evtr_t evtr)
400 struct evtr_event ev;
403 bzero(&ev, sizeof(ev));
404 ev.type = EVTR_TYPE_SYSINFO;
406 evtr_dump_event(evtr, &ev);
407 if (evtr_error(evtr)) {
408 err(1, "%s", evtr_errmsg(evtr));
411 for (i = 0; i < ncpus; ++i) {
412 bzero(&ev, sizeof(ev));
413 ev.type = EVTR_TYPE_CPUINFO;
415 ev.cpuinfo.freq = tsc_frequency;
416 evtr_dump_event(evtr, &ev);
417 if (evtr_error(evtr)) {
418 err(1, "%s", evtr_errmsg(evtr));
424 print_header(FILE *fo, int row)
426 if (qflag == 0 && (u_int32_t)row % 20 == 0) {
427 fprintf(fo, "%-6s ", "index");
429 fprintf(fo, "%-3s ", "cpu");
431 fprintf(fo, "%-16s ", "timestamp");
434 fprintf(fo, "%-18s %-18s ", "caller2", "caller1");
436 fprintf(fo, "%-25s %-25s ", "caller2", "caller1");
439 fprintf(fo, "%-20s ", "ID");
441 fprintf(fo, "%10s%-30s", "", "file and line");
443 fprintf(fo, "%s", "trace");
449 print_entry(FILE *fo, int n, int row, struct ktr_entry *entry,
450 u_int64_t *last_timestamp)
452 struct ktr_info *info = NULL;
453 static struct save_ctx nctx, pctx, fmtctx, symctx, infoctx;
455 fprintf(fo, "%06x ", row & 0x00FFFFFF);
457 fprintf(fo, "%-3d ", n);
458 if (tflag || rflag) {
459 if (rflag && !nflag && tsc_frequency != 0.0) {
460 fprintf(fo, "%13.3f uS ",
461 (double)(entry->ktr_timestamp - *last_timestamp) * 1000000.0 / tsc_frequency - correction_factor);
463 fprintf(fo, "%-16ju ",
464 (uintmax_t)(entry->ktr_timestamp - *last_timestamp));
466 fprintf(fo, "%-16ju ",
467 (uintmax_t)entry->ktr_timestamp);
472 fprintf(fo, "%p %p ",
473 entry->ktr_caller2, entry->ktr_caller1);
475 fprintf(fo, "%-25s ",
476 address_to_symbol(entry->ktr_caller2, &symctx));
477 fprintf(fo, "%-25s ",
478 address_to_symbol(entry->ktr_caller1, &symctx));
482 info = kvm_ktrinfo(entry->ktr_info, &infoctx);
484 fprintf(fo, "%-20s ", kvm_string(info->kf_name, &nctx));
486 fprintf(fo, "%-20s ", "<empty>");
489 fprintf(fo, "%34s:%-4d ",
490 trunc_path(kvm_string(entry->ktr_file, &pctx), 34),
494 info = kvm_ktrinfo(entry->ktr_info, &infoctx);
498 fmt = kvm_string(info->kf_format, &fmtctx);
499 if (va_list_from_blob(&ap, fmt,
500 (char *)&entry->ktr_data,
502 err(2, "Can't generate va_list from %s", fmt);
503 kvmfprintf(fo, kvm_string(info->kf_format, &fmtctx),
505 va_list_cleanup(&ap);
509 *last_timestamp = entry->ktr_timestamp;
514 print_callback(void *ctx, int n, int row, struct ktr_entry *entry, uint64_t *last_ts)
516 FILE *fo = (FILE *)ctx;
517 print_header(fo, row);
518 print_entry(fo, n, row, entry, last_ts);
522 * If free == 0, replace all (kvm) string pointers in fmtdata with pointers
523 * to user-allocated copies of the strings.
524 * If free != 0, free those pointers.
528 mangle_string_ptrs(const char *fmt, uint8_t *fmtdata, int dofree)
531 size_t skipsize, intsz;
532 static struct save_ctx strctx;
535 for (f = fmt; f[0] != '\0'; ++f) {
540 for (p = f; p[0]; ++p) {
543 * Eat flags. Notice this will accept duplicate
559 /* Eat minimum field width, if any */
560 for (; isdigit(p[0]); ++p)
564 /* Eat precision, if any */
565 for (; isdigit(p[0]); ++p)
572 intsz = sizeof(char);
574 intsz = sizeof(short);
580 intsz = sizeof(long long);
582 intsz = sizeof(long);
586 intsz = sizeof(intmax_t);
589 intsz = sizeof(ptrdiff_t);
592 intsz = sizeof(size_t);
613 skipsize = sizeof(void *);
617 skipsize = sizeof(double);
619 skipsize = sizeof(float);
623 char *t = ((char **)fmtdata)[0];
625 skipsize = sizeof(char *);
627 char *t = strdup(kvm_string(((char **)fmtdata)[0],
629 ((const char **)fmtdata)[0] = t;
631 skipsize = sizeof(char *);
636 fprintf(stderr, "Unknown conversion specifier %c "
637 "in fmt starting with %s\n", p[0], f - 1);
647 dump_callback(void *ctx, int n, int row __unused, struct ktr_entry *entry,
648 uint64_t *last_ts __unused)
650 evtr_t evtr = (evtr_t)ctx;
651 struct evtr_event ev;
652 static struct save_ctx pctx, fmtctx, infoctx;
654 int conv = 0; /* pointless */
656 ev.ts = entry->ktr_timestamp;
657 ev.type = EVTR_TYPE_PROBE;
658 ev.line = entry->ktr_line;
659 ev.file = kvm_string(entry->ktr_file, &pctx);
662 if ((ki = kvm_ktrinfo(entry->ktr_info, &infoctx))) {
663 ev.fmt = kvm_string(ki->kf_format, &fmtctx);
664 ev.fmtdata = entry->ktr_data;
665 if ((conv = mangle_string_ptrs(ev.fmt,
666 __DECONST(uint8_t *, ev.fmtdata),
668 errx(1, "Can't parse format string");
669 ev.fmtdatalen = ki->kf_data_size;
671 ev.fmt = ev.fmtdata = NULL;
674 if (evtr_dump_event(evtr, &ev)) {
675 err(1, "%s", evtr_errmsg(evtr));
677 if (ev.fmtdata && conv) {
678 mangle_string_ptrs(ev.fmt, __DECONST(uint8_t *, ev.fmtdata),
685 kvm_ktrinfo(void *kptr, struct save_ctx *ctx)
687 struct ktr_info *ki = (void *)ctx->save_buf;
691 if (ctx->save_kptr != kptr) {
692 if (kvm_read(kd, (uintptr_t)kptr, ki, sizeof(*ki)) == -1) {
693 bzero(&ki, sizeof(*ki));
695 ctx->save_kptr = kptr;
703 kvm_string(const char *kptr, struct save_ctx *ctx)
710 if (ctx->save_kptr != (const void *)kptr) {
711 ctx->save_kptr = (const void *)kptr;
713 while (l < sizeof(ctx->save_buf) - 1) {
714 n = 256 - ((intptr_t)(kptr + l) & 255);
715 if (n > sizeof(ctx->save_buf) - l - 1)
716 n = sizeof(ctx->save_buf) - l - 1;
717 if (kvm_read(kd, (uintptr_t)(kptr + l), ctx->save_buf + l, n) < 0)
719 while (l < sizeof(ctx->save_buf) && n) {
720 if (ctx->save_buf[l] == 0)
728 ctx->save_buf[l] = 0;
730 return(ctx->save_buf);
735 trunc_path(const char *str, int maxlen)
737 int len = strlen(str);
740 return(str + len - maxlen);
746 TAILQ_ENTRY(symdata) link;
752 static TAILQ_HEAD(symlist, symdata) symlist;
753 static struct symdata *symcache;
754 static char *symbegin;
759 read_symbols(const char *file)
763 size_t buflen = sizeof(buf);
765 struct symdata *sym = NULL;
770 TAILQ_INIT(&symlist);
773 if (sysctlbyname("kern.bootfile", buf, &buflen, NULL, 0) < 0)
774 file = "/boot/kernel/kernel";
778 snprintf(cmd, sizeof(cmd), "nm -n %s", file);
779 if ((fp = popen(cmd, "r")) != NULL) {
780 while (fgets(buf, sizeof(buf), fp) != NULL) {
781 s1 = strtok(buf, " \t\n");
782 s2 = strtok(NULL, " \t\n");
783 s3 = strtok(NULL, " \t\n");
784 if (s1 && s2 && s3) {
785 sym = malloc(sizeof(struct symdata));
786 sym->symaddr = (char *)strtoul(s1, NULL, 16);
787 sym->symtype = s2[0];
788 sym->symname = strdup(s3);
789 if (strcmp(s3, "kernbase") == 0)
790 symbegin = sym->symaddr;
791 if (strcmp(s3, "end") == 0 || strcmp(s3, "_end") == 0)
792 symend = sym->symaddr;
793 TAILQ_INSERT_TAIL(&symlist, sym, link);
798 if (symend == NULL) {
800 symend = sym->symaddr;
804 symcache = TAILQ_FIRST(&symlist);
809 address_to_symbol(void *kptr, struct save_ctx *ctx)
811 char *buf = ctx->save_buf;
812 int size = sizeof(ctx->save_buf);
814 if (symcache == NULL ||
815 (char *)kptr < symbegin || (char *)kptr >= symend
817 snprintf(buf, size, "%p", kptr);
820 while ((char *)symcache->symaddr < (char *)kptr) {
821 if (TAILQ_NEXT(symcache, link) == NULL)
823 symcache = TAILQ_NEXT(symcache, link);
825 while ((char *)symcache->symaddr > (char *)kptr) {
826 if (symcache != TAILQ_FIRST(&symlist))
827 symcache = TAILQ_PREV(symcache, symlist, link);
829 snprintf(buf, size, "%s+%d", symcache->symname,
830 (int)((char *)kptr - symcache->symaddr));
838 struct ktr_buffer *ktr_bufs, *it;
841 ktr_bufs = malloc(sizeof(*ktr_bufs) * ncpus);
843 err(1, "can't allocate data structures");
844 for (i = 0; i < ncpus; ++i) {
846 it->ents = malloc(sizeof(struct ktr_entry) * entries_per_buf);
847 if (it->ents == NULL)
848 err(1, "can't allocate data structures");
858 get_indices(struct ktr_entry **ktr_kbuf, int *ktr_idx)
860 static struct ktr_cpu *ktr_cpus;
863 if (ktr_cpus == NULL)
864 ktr_cpus = malloc(sizeof(*ktr_cpus) * ncpus);
866 if (ktr_version < KTR_VERSION_KTR_CPU) {
867 if (kvm_read(kd, nl_version_ktr_idx[0].n_value, ktr_idx,
868 sizeof(*ktr_idx) * ncpus) == -1) {
869 errx(1, "%s", kvm_geterr(kd));
871 if (ktr_kbuf[0] == NULL) {
872 if (kvm_read(kd, nl_version_ktr_idx[1].n_value,
873 ktr_kbuf, sizeof(*ktr_kbuf) * ncpus) == -1) {
874 errx(1, "%s", kvm_geterr(kd));
878 if (kvm_read(kd, nl_version_ktr_cpu[0].n_value,
879 ktr_cpus, sizeof(*ktr_cpus) * ncpus) == -1) {
880 errx(1, "%s", kvm_geterr(kd));
882 for (i = 0; i < ncpus; ++i) {
883 ktr_idx[i] = ktr_cpus[i].core.ktr_idx;
884 ktr_kbuf[i] = ktr_cpus[i].core.ktr_buf;
890 * Get the trace buffer data from the kernel
894 load_bufs(struct ktr_buffer *ktr_bufs, struct ktr_entry **kbufs, int *ktr_idx)
896 struct ktr_buffer *kbuf;
899 get_indices(kbufs, ktr_idx);
900 for (i = 0; i < ncpus; ++i) {
902 if (ktr_idx[i] == kbuf->end_idx)
904 kbuf->end_idx = ktr_idx[i];
907 * If we do not have a notion of the beginning index, assume
908 * it is entries_per_buf before the ending index. Don't
909 * worry about underflows/negative numbers, the indices will
913 kbuf->beg_idx = kbuf->end_idx - entries_per_buf + 1;
916 if (kvm_read(kd, (uintptr_t)kbufs[i], ktr_bufs[i].ents,
917 sizeof(struct ktr_entry) * entries_per_buf)
919 errx(1, "%s", kvm_geterr(kd));
921 kbuf->beg_idx = earliest_ts(kbuf);
927 * Locate the earliest timestamp iterating backwards from end_idx, but
928 * not going further back then beg_idx. We have to do this because
929 * the kernel uses a circulating buffer.
933 earliest_ts(struct ktr_buffer *buf)
935 struct ktr_entry *save;
936 int count, scan, i, earliest;
939 earliest = buf->end_idx - 1;
940 save = &buf->ents[earliest & fifo_mask];
941 for (scan = buf->end_idx - 1; scan != buf->beg_idx -1; --scan) {
942 i = scan & fifo_mask;
943 if (buf->ents[i].ktr_timestamp <= save->ktr_timestamp &&
944 buf->ents[i].ktr_timestamp > 0)
947 * We may have gotten so far behind that beg_idx wrapped
948 * more then once around the buffer. Just stop
950 if (++count == entries_per_buf)
958 iterate_buf(FILE *fo, struct ktr_buffer *ktr_bufs, int cpu,
959 u_int64_t *last_timestamp, ktr_iter_cb_t cb)
961 struct ktr_buffer *buf = ktr_bufs + cpu;
963 if (buf->modified == 0)
965 if (*last_timestamp == 0) {
967 buf->ents[buf->beg_idx & fifo_mask].ktr_timestamp;
969 while (buf->beg_idx != buf->end_idx) {
970 cb(fo, cpu, buf->beg_idx,
971 &buf->ents[buf->beg_idx & fifo_mask],
980 iterate_bufs_timesorted(FILE *fo, struct ktr_buffer *ktr_bufs,
981 u_int64_t *last_timestamp, ktr_iter_cb_t cb)
983 struct ktr_entry *ent;
984 struct ktr_buffer *buf;
992 for (n = 0; n < ncpus; ++n) {
994 if (buf->beg_idx == buf->end_idx)
996 ent = &buf->ents[buf->beg_idx & fifo_mask];
997 if (ts == 0 || (ts >= ent->ktr_timestamp)) {
998 ts = ent->ktr_timestamp;
1002 if ((bestn < 0) || (ts < *last_timestamp))
1004 buf = ktr_bufs + bestn;
1006 &buf->ents[buf->beg_idx & fifo_mask],
1009 *last_timestamp = ts;
1016 kvmfprintf(FILE *fp, const char *ctl, va_list va)
1022 static struct save_ctx strctx;
1026 for (n = 0; ctl[n]; ++n) {
1035 while (n < (int)sizeof(fmt)) {
1063 va_arg(va, long long));
1067 va_arg(va, size_t));
1074 fprintf(fp, "%c", va_arg(va, int));
1082 s = kvm_string(va_arg(va, char *), &strctx);
1083 fwrite(s, 1, strlen(s), fp);
1092 va_arg(va, double));
1136 fprintf(fp, fmt, NULL);
1145 fprintf(stderr, "usage: ktrdump [-acfilnpqrstx] [-A factor] "
1146 "[-N execfile] [-M corefile] [-o outfile]\n");
1150 enum argument_class {
1158 conversion_size(const char *fmt, enum argument_class *argclass)
1161 size_t convsize, intsz;
1163 *argclass = ARGCLASS_ERR;
1168 for (p = fmt + 1; p[0]; ++p) {
1171 * Eat flags. Notice this will accept duplicate
1187 /* Eat minimum field width, if any */
1188 for (; isdigit(p[0]); ++p)
1192 /* Eat precision, if any */
1193 for (; isdigit(p[0]); ++p)
1200 intsz = sizeof(char);
1202 intsz = sizeof(short);
1208 intsz = sizeof(long long);
1210 intsz = sizeof(long);
1214 intsz = sizeof(intmax_t);
1217 intsz = sizeof(ptrdiff_t);
1220 intsz = sizeof(size_t);
1223 p--; /* Anticipate the ++p that follows. Yes, I know. Eeek. */
1227 intsz = sizeof(int);
1232 /* for %c, we only store 1 byte in the ktr entry */
1233 convsize = sizeof(char);
1234 *argclass = ARGCLASS_INTEGER;
1243 *argclass = ARGCLASS_INTEGER;
1246 convsize = sizeof(void *);
1247 *argclass = ARGCLASS_INTEGER;
1251 convsize = sizeof(double);
1253 convsize = sizeof(float);
1255 *argclass = ARGCLASS_FP;
1257 convsize = sizeof(char *);
1258 *argclass = ARGCLASS_INTEGER;
1262 *argclass = ARGCLASS_NONE;
1265 fprintf(stderr, "Unknown conversion specifier %c "
1266 "in fmt starting with %s\n", p[0], fmt - 1);
1274 va_list_push_integral(struct my_va_list *valist, void *val, size_t valsize,
1281 r = *(uint8_t *)val; break;
1283 r = *(uint32_t *)val; break;
1285 r = (*(uint32_t *)val); break;
1287 r = *(uint64_t *)val; break;
1291 /* we always need to push the full 8 bytes */
1292 if ((valist->gp_offset + valsize) <= 48) { /* got a free reg */
1294 memcpy(((char *)valist->reg_save_area + valist->gp_offset),
1296 valist->gp_offset += sizeof(r);
1299 /* push to "stack" */
1300 if (!(valist->overflow_arg_area = realloc(valist->overflow_arg_area,
1301 *stacksize + sizeof(r))))
1304 * Keep a pointer to the start of the allocated memory block so
1305 * we can free it later. We need to update it after every realloc().
1307 valist->overflow_arg_area_save = valist->overflow_arg_area;
1308 memcpy((char *)valist->overflow_arg_area + *stacksize, &r, sizeof(r));
1309 *stacksize += sizeof(r);
1314 va_list_rewind(struct my_va_list *valist)
1316 valist->gp_offset = 0;
1320 va_list_cleanup(machine_va_list *_valist)
1322 machine_va_list valist;
1323 if (!_valist || !*_valist)
1326 if (valist->reg_save_area)
1327 free(valist->reg_save_area);
1328 if (valist->overflow_arg_area_save)
1329 free(valist->overflow_arg_area_save);
1334 va_list_from_blob(machine_va_list *_valist, const char *fmt, char *blob, size_t blobsize)
1336 machine_va_list valist;
1337 struct reg_save_area *regs;
1341 if (!(valist = malloc(sizeof(*valist))))
1343 if (!(regs = malloc(sizeof(*regs))))
1345 *valist = (struct my_va_list) {
1348 .overflow_arg_area = NULL,
1349 .reg_save_area = regs,
1350 .overflow_arg_area_save = NULL,
1352 enum argument_class argclass;
1353 size_t stacksize = 0;
1355 for (f = fmt; *f != '\0'; ++f) {
1358 sz = conversion_size(f, &argclass);
1359 if (argclass == ARGCLASS_INTEGER) {
1360 if (blobsize < sz) {
1361 fprintf(stderr, "not enough data available "
1362 "for format: %s\n", fmt);
1365 if (va_list_push_integral(valist, blob, sz, &stacksize))
1369 } else if (argclass != ARGCLASS_NONE)
1371 /* walk past the '%' */
1375 fprintf(stderr, "Couldn't consume all data for format %s "
1376 "(%zd bytes left over)\n", fmt, blobsize);
1379 va_list_rewind(valist);
1383 if (valist->reg_save_area)
1384 free(valist->reg_save_area);
1385 if (valist->overflow_arg_area_save)
1386 free(valist->overflow_arg_area_save);
1394 #error "Don't know how to get a va_list on this platform"