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 */
111 typedef void *machine_va_list;
128 static double tsc_frequency;
129 static double correction_factor = 0.0;
131 static char corefile[PATH_MAX];
132 static char execfile[PATH_MAX];
134 static char errbuf[_POSIX2_LINE_MAX];
137 static int entries_per_buf;
138 static int fifo_mask;
139 static int ktr_version;
141 static void usage(void);
142 static int earliest_ts(struct ktr_buffer *);
143 static void dump_machine_info(evtr_t);
144 static void dump_device_info(evtr_t);
145 static void print_header(FILE *, int);
146 static void print_entry(FILE *, int, int, struct ktr_entry *, u_int64_t *);
147 static void print_callback(void *, int, int, struct ktr_entry *, uint64_t *);
148 static void dump_callback(void *, int, int, struct ktr_entry *, uint64_t *);
149 static struct ktr_info *kvm_ktrinfo(void *, struct save_ctx *);
150 static const char *kvm_string(const char *, struct save_ctx *);
151 static const char *trunc_path(const char *, int);
152 static void read_symbols(const char *);
153 static const char *address_to_symbol(void *, struct save_ctx *);
154 static struct ktr_buffer *ktr_bufs_init(void);
155 static void get_indices(struct ktr_entry **, int *);
156 static void load_bufs(struct ktr_buffer *, struct ktr_entry **, int *);
157 static void iterate_buf(FILE *, struct ktr_buffer *, int, u_int64_t *, ktr_iter_cb_t);
158 static void iterate_bufs_timesorted(FILE *, struct ktr_buffer *, u_int64_t *, ktr_iter_cb_t);
159 static void kvmfprintf(FILE *fp, const char *ctl, va_list va);
160 static int va_list_from_blob(machine_va_list *valist, const char *fmt, char *blob, size_t blobsize);
161 static void va_list_cleanup(machine_va_list *valist);
163 * Reads the ktr trace buffer from kernel memory and prints the trace entries.
166 main(int ac, char **av)
168 struct ktr_buffer *ktr_bufs;
169 struct ktr_entry **ktr_kbuf;
170 ktr_iter_cb_t callback = &print_callback;
175 int *ktr_start_index;
180 * Parse commandline arguments.
183 while ((c = getopt(ac, av, "acfinqrtxpslA:N:M:o:d")) != -1) {
199 callback = &dump_callback;
202 if (strlcpy(execfile, optarg, sizeof(execfile))
204 errx(1, "%s: File name too long", optarg);
217 correction_factor = strtod(optarg, NULL);
220 if (strlcpy(corefile, optarg, sizeof(corefile))
222 errx(1, "%s: File name too long", optarg);
229 if ((fo = fopen(optarg, "w")) == NULL)
230 err(1, "%s", optarg);
242 sflag = 1; /* sort across the cpus */
257 ctx = evtr_open_write(fo);
259 err(1, "Can't create event stream");
262 if (cflag + iflag + tflag + xflag + fflag + pflag == 0) {
268 if (correction_factor != 0.0 && (rflag == 0 || nflag)) {
269 fprintf(stderr, "Correction factor can only be applied with -r and without -n\n");
278 * Open our execfile and corefile, resolve needed symbols and read in
281 if ((kd = kvm_openfiles(Nflag ? execfile : NULL,
282 Mflag ? corefile : NULL, NULL, O_RDONLY, errbuf)) == NULL)
283 errx(1, "%s", errbuf);
284 if (kvm_nlist(kd, nl1) != 0)
285 errx(1, "%s", kvm_geterr(kd));
286 if (kvm_read(kd, nl1[0].n_value, &ktr_version, sizeof(ktr_version)) == -1)
287 errx(1, "%s", kvm_geterr(kd));
288 if (kvm_read(kd, nl1[2].n_value, &ncpus, sizeof(ncpus)) == -1)
289 errx(1, "%s", kvm_geterr(kd));
290 ktr_start_index = malloc(sizeof(*ktr_start_index) * ncpus);
291 if (ktr_version >= KTR_VERSION_WITH_FREQ && kvm_nlist(kd, nl2) == 0) {
292 if (kvm_read(kd, nl2[0].n_value, &tts, sizeof(tts)) == -1)
293 errx(1, "%s", kvm_geterr(kd));
294 tsc_frequency = (double)tts;
296 if (ktr_version > KTR_VERSION)
297 errx(1, "ktr version too high for us to handle");
298 if (kvm_read(kd, nl1[1].n_value, &entries_per_buf,
299 sizeof(entries_per_buf)) == -1)
300 errx(1, "%s", kvm_geterr(kd));
301 fifo_mask = entries_per_buf - 1;
303 printf("TSC frequency is %6.3f MHz\n", tsc_frequency / 1000000.0);
306 dump_machine_info((evtr_t)ctx);
307 dump_device_info((evtr_t)ctx);
309 ktr_kbuf = calloc(ncpus, sizeof(*ktr_kbuf));
310 ktr_idx = calloc(ncpus, sizeof(*ktr_idx));
313 read_symbols(Nflag ? execfile : NULL);
315 if (ktr_version < KTR_VERSION_KTR_CPU) {
316 if (kvm_nlist(kd, nl_version_ktr_idx))
317 errx(1, "%s", kvm_geterr(kd));
319 if (kvm_nlist(kd, nl_version_ktr_cpu))
320 errx(1, "%s", kvm_geterr(kd));
323 get_indices(ktr_kbuf, ktr_idx);
325 ktr_bufs = ktr_bufs_init();
328 u_int64_t last_timestamp = 0;
330 load_bufs(ktr_bufs, ktr_kbuf, ktr_idx);
331 iterate_bufs_timesorted(ctx, ktr_bufs, &last_timestamp,
334 usleep(1000000 / 10);
337 u_int64_t *last_timestamp = calloc(sizeof(u_int64_t), ncpus);
339 load_bufs(ktr_bufs, ktr_kbuf, ktr_idx);
340 for (n = 0; n < ncpus; ++n)
341 iterate_buf(ctx, ktr_bufs, n, &last_timestamp[n],
344 usleep(1000000 / 10);
354 dump_devinfo(struct devinfo_dev *dev, void *arg)
356 struct evtr_event ev;
357 evtr_t evtr = (evtr_t)arg;
358 const char *fmt = "#devicenames[\"%s\"] = %#lx";
359 char fmtdatabuf[sizeof(char *) + sizeof(devinfo_handle_t)];
360 char *fmtdata = fmtdatabuf;
362 if (!dev->dd_name[0])
364 ev.type = EVTR_TYPE_PROBE;
371 ((char **)fmtdata)[0] = &dev->dd_name[0];
372 fmtdata += sizeof(char *);
373 ((devinfo_handle_t *)fmtdata)[0] = dev->dd_handle;
374 ev.fmtdata = fmtdatabuf;
375 ev.fmtdatalen = sizeof(fmtdatabuf);
377 if (evtr_dump_event(evtr, &ev)) {
378 err(1, evtr_errmsg(evtr));
381 return devinfo_foreach_device_child(dev, dump_devinfo, evtr);
386 dump_device_info(evtr_t evtr)
388 struct devinfo_dev *root;
391 if (!(root = devinfo_handle_to_device(DEVINFO_ROOT_DEVICE))) {
392 warn("can't find root device");
395 devinfo_foreach_device_child(root, dump_devinfo, evtr);
400 dump_machine_info(evtr_t evtr)
402 struct evtr_event ev;
405 bzero(&ev, sizeof(ev));
406 ev.type = EVTR_TYPE_SYSINFO;
408 evtr_dump_event(evtr, &ev);
409 if (evtr_error(evtr)) {
410 err(1, evtr_errmsg(evtr));
413 for (i = 0; i < ncpus; ++i) {
414 bzero(&ev, sizeof(ev));
415 ev.type = EVTR_TYPE_CPUINFO;
417 ev.cpuinfo.freq = tsc_frequency;
418 evtr_dump_event(evtr, &ev);
419 if (evtr_error(evtr)) {
420 err(1, evtr_errmsg(evtr));
426 print_header(FILE *fo, int row)
428 if (qflag == 0 && (u_int32_t)row % 20 == 0) {
429 fprintf(fo, "%-6s ", "index");
431 fprintf(fo, "%-3s ", "cpu");
433 fprintf(fo, "%-16s ", "timestamp");
436 fprintf(fo, "%-10s %-10s", "caller2", "caller1");
438 fprintf(fo, "%-20s %-20s", "caller2", "caller1");
441 fprintf(fo, "%-20s ", "ID");
443 fprintf(fo, "%10s%-30s ", "", "file and line");
445 fprintf(fo, "%s", "trace");
451 print_entry(FILE *fo, int n, int row, struct ktr_entry *entry,
452 u_int64_t *last_timestamp)
454 struct ktr_info *info = NULL;
455 static struct save_ctx nctx, pctx, fmtctx, symctx, infoctx;
457 fprintf(fo, " %06x ", row & 0x00FFFFFF);
459 fprintf(fo, "%-3d ", n);
460 if (tflag || rflag) {
461 if (rflag && !nflag && tsc_frequency != 0.0) {
462 fprintf(fo, "%13.3f uS ",
463 (double)(entry->ktr_timestamp - *last_timestamp) * 1000000.0 / tsc_frequency - correction_factor);
465 fprintf(fo, "%-16ju ",
466 (uintmax_t)(entry->ktr_timestamp - *last_timestamp));
468 fprintf(fo, "%-16ju ",
469 (uintmax_t)entry->ktr_timestamp);
474 fprintf(fo, "%p %p ",
475 entry->ktr_caller2, entry->ktr_caller1);
477 fprintf(fo, "%-25s ",
478 address_to_symbol(entry->ktr_caller2, &symctx));
479 fprintf(fo, "%-25s ",
480 address_to_symbol(entry->ktr_caller1, &symctx));
484 info = kvm_ktrinfo(entry->ktr_info, &infoctx);
486 fprintf(fo, "%-20s ", kvm_string(info->kf_name, &nctx));
488 fprintf(fo, "%-20s ", "<empty>");
491 fprintf(fo, "%34s:%-4d ",
492 trunc_path(kvm_string(entry->ktr_file, &pctx), 34),
496 info = kvm_ktrinfo(entry->ktr_info, &infoctx);
500 fmt = kvm_string(info->kf_format, &fmtctx);
501 if (va_list_from_blob(&ap, fmt,
502 (char *)&entry->ktr_data,
504 err(2, "Can't generate va_list from %s\n", fmt);
505 kvmfprintf(fo, kvm_string(info->kf_format, &fmtctx),
507 va_list_cleanup(&ap);
511 *last_timestamp = entry->ktr_timestamp;
516 print_callback(void *ctx, int n, int row, struct ktr_entry *entry, uint64_t *last_ts)
518 FILE *fo = (FILE *)ctx;
519 print_header(fo, row);
520 print_entry(fo, n, row, entry, last_ts);
524 * If free == 0, replace all (kvm) string pointers in fmtdata with pointers
525 * to user-allocated copies of the strings.
526 * If free != 0, free those pointers.
530 mangle_string_ptrs(const char *fmt, uint8_t *fmtdata, int dofree)
533 size_t skipsize, intsz;
534 static struct save_ctx strctx;
537 for (f = fmt; f[0] != '\0'; ++f) {
542 for (p = f; p[0]; ++p) {
545 * Eat flags. Notice this will accept duplicate
561 /* Eat minimum field width, if any */
562 for (; isdigit(p[0]); ++p)
566 /* Eat precision, if any */
567 for (; isdigit(p[0]); ++p)
574 intsz = sizeof(long long);
576 intsz = sizeof(long);
580 intsz = sizeof(intmax_t);
583 intsz = sizeof(ptrdiff_t);
586 intsz = sizeof(size_t);
607 skipsize = sizeof(void *);
611 skipsize = sizeof(double);
613 skipsize = sizeof(float);
617 char *t = ((char **)fmtdata)[0];
619 skipsize = sizeof(char *);
621 char *t = strdup(kvm_string(((char **)fmtdata)[0],
623 ((const char **)fmtdata)[0] = t;
625 skipsize = sizeof(char *);
630 fprintf(stderr, "Unknown conversion specifier %c "
631 "in fmt starting with %s", p[0], f - 1);
641 dump_callback(void *ctx, int n, int row __unused, struct ktr_entry *entry,
642 uint64_t *last_ts __unused)
644 evtr_t evtr = (evtr_t)ctx;
645 struct evtr_event ev;
646 static struct save_ctx pctx, fmtctx, infoctx;
648 int conv = 0; /* pointless */
650 ev.ts = entry->ktr_timestamp;
651 ev.type = EVTR_TYPE_PROBE;
652 ev.line = entry->ktr_line;
653 ev.file = kvm_string(entry->ktr_file, &pctx);
656 if ((ki = kvm_ktrinfo(entry->ktr_info, &infoctx))) {
657 ev.fmt = kvm_string(ki->kf_format, &fmtctx);
658 ev.fmtdata = entry->ktr_data;
659 if ((conv = mangle_string_ptrs(ev.fmt,
660 __DECONST(uint8_t *, ev.fmtdata),
662 errx(1, "Can't parse format string\n");
663 ev.fmtdatalen = ki->kf_data_size;
665 ev.fmt = ev.fmtdata = NULL;
668 if (evtr_dump_event(evtr, &ev)) {
669 err(1, evtr_errmsg(evtr));
671 if (ev.fmtdata && conv) {
672 mangle_string_ptrs(ev.fmt, __DECONST(uint8_t *, ev.fmtdata),
679 kvm_ktrinfo(void *kptr, struct save_ctx *ctx)
681 struct ktr_info *ki = (void *)ctx->save_buf;
685 if (ctx->save_kptr != kptr) {
686 if (kvm_read(kd, (uintptr_t)kptr, ki, sizeof(*ki)) == -1) {
687 bzero(&ki, sizeof(*ki));
689 ctx->save_kptr = kptr;
697 kvm_string(const char *kptr, struct save_ctx *ctx)
704 if (ctx->save_kptr != (const void *)kptr) {
705 ctx->save_kptr = (const void *)kptr;
707 while (l < sizeof(ctx->save_buf) - 1) {
708 n = 256 - ((intptr_t)(kptr + l) & 255);
709 if (n > sizeof(ctx->save_buf) - l - 1)
710 n = sizeof(ctx->save_buf) - l - 1;
711 if (kvm_read(kd, (uintptr_t)(kptr + l), ctx->save_buf + l, n) < 0)
713 while (l < sizeof(ctx->save_buf) && n) {
714 if (ctx->save_buf[l] == 0)
722 ctx->save_buf[l] = 0;
724 return(ctx->save_buf);
729 trunc_path(const char *str, int maxlen)
731 int len = strlen(str);
734 return(str + len - maxlen);
740 TAILQ_ENTRY(symdata) link;
746 static TAILQ_HEAD(symlist, symdata) symlist;
747 static struct symdata *symcache;
748 static char *symbegin;
753 read_symbols(const char *file)
757 size_t buflen = sizeof(buf);
764 TAILQ_INIT(&symlist);
767 if (sysctlbyname("kern.bootfile", buf, &buflen, NULL, 0) < 0)
768 file = "/boot/kernel";
772 snprintf(cmd, sizeof(cmd), "nm -n %s", file);
773 if ((fp = popen(cmd, "r")) != NULL) {
774 while (fgets(buf, sizeof(buf), fp) != NULL) {
775 s1 = strtok(buf, " \t\n");
776 s2 = strtok(NULL, " \t\n");
777 s3 = strtok(NULL, " \t\n");
778 if (s1 && s2 && s3) {
779 sym = malloc(sizeof(struct symdata));
780 sym->symaddr = (char *)strtoul(s1, NULL, 16);
781 sym->symtype = s2[0];
782 sym->symname = strdup(s3);
783 if (strcmp(s3, "kernbase") == 0)
784 symbegin = sym->symaddr;
785 if (strcmp(s3, "end") == 0)
786 symend = sym->symaddr;
787 TAILQ_INSERT_TAIL(&symlist, sym, link);
792 symcache = TAILQ_FIRST(&symlist);
797 address_to_symbol(void *kptr, struct save_ctx *ctx)
799 char *buf = ctx->save_buf;
800 int size = sizeof(ctx->save_buf);
802 if (symcache == NULL ||
803 (char *)kptr < symbegin || (char *)kptr >= symend
805 snprintf(buf, size, "%p", kptr);
808 while ((char *)symcache->symaddr < (char *)kptr) {
809 if (TAILQ_NEXT(symcache, link) == NULL)
811 symcache = TAILQ_NEXT(symcache, link);
813 while ((char *)symcache->symaddr > (char *)kptr) {
814 if (symcache != TAILQ_FIRST(&symlist))
815 symcache = TAILQ_PREV(symcache, symlist, link);
817 snprintf(buf, size, "%s+%d", symcache->symname,
818 (int)((char *)kptr - symcache->symaddr));
826 struct ktr_buffer *ktr_bufs, *it;
829 ktr_bufs = malloc(sizeof(*ktr_bufs) * ncpus);
831 err(1, "can't allocate data structures\n");
832 for (i = 0; i < ncpus; ++i) {
834 it->ents = malloc(sizeof(struct ktr_entry) * entries_per_buf);
835 if (it->ents == NULL)
836 err(1, "can't allocate data structures\n");
846 get_indices(struct ktr_entry **ktr_kbuf, int *ktr_idx)
848 static struct ktr_cpu *ktr_cpus;
851 if (ktr_cpus == NULL)
852 ktr_cpus = malloc(sizeof(*ktr_cpus) * ncpus);
854 if (ktr_version < KTR_VERSION_KTR_CPU) {
855 if (kvm_read(kd, nl_version_ktr_idx[0].n_value, ktr_idx,
856 sizeof(*ktr_idx) * ncpus) == -1) {
857 errx(1, "%s", kvm_geterr(kd));
859 if (ktr_kbuf[0] == NULL) {
860 if (kvm_read(kd, nl_version_ktr_idx[1].n_value,
861 ktr_kbuf, sizeof(*ktr_kbuf) * ncpus) == -1) {
862 errx(1, "%s", kvm_geterr(kd));
866 if (kvm_read(kd, nl_version_ktr_cpu[0].n_value,
867 ktr_cpus, sizeof(*ktr_cpus) * ncpus) == -1) {
868 errx(1, "%s", kvm_geterr(kd));
870 for (i = 0; i < ncpus; ++i) {
871 ktr_idx[i] = ktr_cpus[i].core.ktr_idx;
872 ktr_kbuf[i] = ktr_cpus[i].core.ktr_buf;
878 * Get the trace buffer data from the kernel
882 load_bufs(struct ktr_buffer *ktr_bufs, struct ktr_entry **kbufs, int *ktr_idx)
884 struct ktr_buffer *kbuf;
887 get_indices(kbufs, ktr_idx);
888 for (i = 0; i < ncpus; ++i) {
890 if (ktr_idx[i] == kbuf->end_idx)
892 kbuf->end_idx = ktr_idx[i];
895 * If we do not have a notion of the beginning index, assume
896 * it is entries_per_buf before the ending index. Don't
897 * worry about underflows/negative numbers, the indices will
901 kbuf->beg_idx = kbuf->end_idx - entries_per_buf + 1;
904 if (kvm_read(kd, (uintptr_t)kbufs[i], ktr_bufs[i].ents,
905 sizeof(struct ktr_entry) * entries_per_buf)
907 errx(1, "%s", kvm_geterr(kd));
909 kbuf->beg_idx = earliest_ts(kbuf);
915 * Locate the earliest timestamp iterating backwards from end_idx, but
916 * not going further back then beg_idx. We have to do this because
917 * the kernel uses a circulating buffer.
921 earliest_ts(struct ktr_buffer *buf)
923 struct ktr_entry *save;
924 int count, scan, i, earliest;
927 earliest = buf->end_idx - 1;
928 save = &buf->ents[earliest & fifo_mask];
929 for (scan = buf->end_idx - 1; scan != buf->beg_idx -1; --scan) {
930 i = scan & fifo_mask;
931 if (buf->ents[i].ktr_timestamp <= save->ktr_timestamp &&
932 buf->ents[i].ktr_timestamp > 0)
935 * We may have gotten so far behind that beg_idx wrapped
936 * more then once around the buffer. Just stop
938 if (++count == entries_per_buf)
946 iterate_buf(FILE *fo, struct ktr_buffer *ktr_bufs, int cpu,
947 u_int64_t *last_timestamp, ktr_iter_cb_t cb)
949 struct ktr_buffer *buf = ktr_bufs + cpu;
951 if (buf->modified == 0)
953 if (*last_timestamp == 0) {
955 buf->ents[buf->beg_idx & fifo_mask].ktr_timestamp;
957 while (buf->beg_idx != buf->end_idx) {
958 cb(fo, cpu, buf->beg_idx,
959 &buf->ents[buf->beg_idx & fifo_mask],
968 iterate_bufs_timesorted(FILE *fo, struct ktr_buffer *ktr_bufs,
969 u_int64_t *last_timestamp, ktr_iter_cb_t cb)
971 struct ktr_entry *ent;
972 struct ktr_buffer *buf;
980 for (n = 0; n < ncpus; ++n) {
982 if (buf->beg_idx == buf->end_idx)
984 ent = &buf->ents[buf->beg_idx & fifo_mask];
985 if (ts == 0 || (ts >= ent->ktr_timestamp)) {
986 ts = ent->ktr_timestamp;
990 if ((bestn < 0) || (ts < *last_timestamp))
992 buf = ktr_bufs + bestn;
994 &buf->ents[buf->beg_idx & fifo_mask],
997 *last_timestamp = ts;
1004 kvmfprintf(FILE *fp, const char *ctl, va_list va)
1010 static struct save_ctx strctx;
1014 for (n = 0; ctl[n]; ++n) {
1023 while (n < (int)sizeof(fmt)) {
1050 va_arg(va, long long));
1054 va_arg(va, size_t));
1061 fprintf(fp, "%c", va_arg(va, int));
1069 s = kvm_string(va_arg(va, char *), &strctx);
1070 fwrite(s, 1, strlen(s), fp);
1079 va_arg(va, double));
1118 fprintf(fp, fmt, NULL);
1127 fprintf(stderr, "usage: ktrdump [-acfilnpqrstx] [-A factor] "
1128 "[-N execfile] [-M corefile] [-o outfile]\n");
1132 enum argument_class {
1140 conversion_size(const char *fmt, enum argument_class *argclass)
1143 size_t convsize, intsz;
1145 *argclass = ARGCLASS_ERR;
1150 for (p = fmt + 1; p[0]; ++p) {
1153 * Eat flags. Notice this will accept duplicate
1169 /* Eat minimum field width, if any */
1170 for (; isdigit(p[0]); ++p)
1174 /* Eat precision, if any */
1175 for (; isdigit(p[0]); ++p)
1182 intsz = sizeof(char);
1184 intsz = sizeof(short);
1190 intsz = sizeof(long long);
1192 intsz = sizeof(long);
1196 intsz = sizeof(intmax_t);
1199 intsz = sizeof(ptrdiff_t);
1202 intsz = sizeof(size_t);
1205 p--; /* Anticipate the ++p that follows. Yes, I know. Eeek. */
1209 intsz = sizeof(int);
1214 /* for %c, we only store 1 byte in the ktr entry */
1215 convsize = sizeof(char);
1216 *argclass = ARGCLASS_INTEGER;
1225 *argclass = ARGCLASS_INTEGER;
1228 convsize = sizeof(void *);
1229 *argclass = ARGCLASS_INTEGER;
1233 convsize = sizeof(double);
1235 convsize = sizeof(float);
1237 *argclass = ARGCLASS_FP;
1239 convsize = sizeof(char *);
1240 *argclass = ARGCLASS_INTEGER;
1244 *argclass = ARGCLASS_NONE;
1247 fprintf(stderr, "Unknown conversion specifier %c "
1248 "in fmt starting with %s", p[0], fmt - 1);
1256 va_list_push_integral(struct my_va_list *valist, void *val, size_t valsize,
1263 r = *(uint8_t *)val; break;
1265 r = *(uint32_t *)val; break;
1267 r = (*(uint32_t *)val); break;
1269 r = *(uint64_t *)val; break;
1273 /* we always need to push the full 8 bytes */
1274 if ((valist->gp_offset + valsize) <= 48) { /* got a free reg */
1276 memcpy(((char *)valist->reg_save_area + valist->gp_offset),
1278 valist->gp_offset += sizeof(r);
1281 /* push to "stack" */
1282 if (!(valist->overflow_arg_area = realloc(valist->overflow_arg_area,
1283 *stacksize + sizeof(r))))
1286 * Keep a pointer to the start of the allocated memory block so
1287 * we can free it later. We need to update it after every realloc().
1289 valist->overflow_arg_area_save = valist->overflow_arg_area;
1290 memcpy((char *)valist->overflow_arg_area + *stacksize, &r, sizeof(r));
1291 *stacksize += sizeof(r);
1296 va_list_rewind(struct my_va_list *valist)
1298 valist->gp_offset = 0;
1302 va_list_cleanup(machine_va_list *_valist)
1304 machine_va_list valist;
1305 if (!_valist || !*_valist)
1308 if (valist->reg_save_area)
1309 free(valist->reg_save_area);
1310 if (valist->overflow_arg_area_save)
1311 free(valist->overflow_arg_area_save);
1316 va_list_from_blob(machine_va_list *_valist, const char *fmt, char *blob, size_t blobsize)
1318 machine_va_list valist;
1319 struct reg_save_area *regs;
1323 if (!(valist = malloc(sizeof(*valist))))
1325 if (!(regs = malloc(sizeof(*regs))))
1327 *valist = (struct my_va_list) {
1330 .overflow_arg_area = NULL,
1331 .reg_save_area = regs,
1332 .overflow_arg_area_save = NULL,
1334 enum argument_class argclass;
1335 size_t stacksize = 0;
1337 for (f = fmt; *f != '\0'; ++f) {
1340 sz = conversion_size(f, &argclass);
1341 if (argclass == ARGCLASS_INTEGER) {
1342 if (blobsize < sz) {
1343 fprintf(stderr, "not enough data available "
1344 "for format: %s", fmt);
1347 if (va_list_push_integral(valist, blob, sz, &stacksize))
1351 } else if (argclass != ARGCLASS_NONE)
1353 /* walk past the '%' */
1357 fprintf(stderr, "Couldn't consume all data for format %s "
1358 "(%zd bytes left over)\n", fmt, blobsize);
1361 va_list_rewind(valist);
1365 if (valist->reg_save_area)
1366 free(valist->reg_save_area);
1367 if (valist->overflow_arg_area_save)
1368 free(valist->overflow_arg_area_save);
1377 va_list_cleanup(machine_va_list *valist)
1384 va_list_from_blob(machine_va_list *valist, const char *fmt, char *blob, size_t blobsize)
1389 enum argument_class argclass;
1393 for (f = fmt; *f != '\0'; ++f) {
1396 sz = conversion_size(f, &argclass);
1397 if (blobsize < sz) {
1398 fprintf(stderr, "not enough data available "
1399 "for format: %s", fmt);
1402 if ((argclass == ARGCLASS_INTEGER) && (sz < 4)) {
1403 int i = -1; /* do C integer promotion */
1408 if (!(n = realloc(n, bytes + 4)))
1410 memcpy(n + bytes, &i, sizeof(i));
1413 if (!(n = realloc(n, bytes + sz)))
1415 memcpy(n + bytes, blob, sz);
1423 fprintf(stderr, "Couldn't consume all data for format %s "
1424 "(%zd bytes left over)\n", fmt, blobsize);
1437 #error "Don't know how to get a va_list on this platform"