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#include <stdlib.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#include "../include/spl-ctl.h"
static int spl_debug_mask = ~0;
static int spl_debug_subsystem = ~0;
/* all strings nul-terminated; only the struct and hdr need to be freed */
struct dbg_line {
struct spl_debug_header *hdr;
char *file;
char *fn;
char *text;
};
static int
cmp_rec(const void *p1, const void *p2)
{
struct dbg_line *d1 = *(struct dbg_line **)p1;
struct dbg_line *d2 = *(struct dbg_line **)p2;
if (d1->hdr->ph_sec < d2->hdr->ph_sec)
return -1;
if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
d1->hdr->ph_usec < d2->hdr->ph_usec)
return -1;
if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
d1->hdr->ph_usec == d2->hdr->ph_usec)
return 0;
return 1;
}
static void
print_rec(struct dbg_line **linev, int used, FILE *out)
{
int i;
for (i = 0; i < used; i++) {
struct dbg_line *line = linev[i];
struct spl_debug_header *hdr = line->hdr;
fprintf(out, "%08x:%08x:%u:%u.%06llu:%u:%u:%u:(%s:%u:%s()) %s",
hdr->ph_subsys, hdr->ph_mask, hdr->ph_cpu_id,
hdr->ph_sec, (unsigned long long)hdr->ph_usec,
hdr->ph_stack, hdr->ph_pid, hdr->ph_stack, line->file,
hdr->ph_line_num, line->fn, line->text);
free(line->hdr);
free(line);
}
free(linev);
}
static int
add_rec(struct dbg_line *line, struct dbg_line ***linevp, int *lenp, int used)
{
struct dbg_line **linev = *linevp;
if (used == *lenp) {
int nlen = *lenp + 512;
int nsize = nlen * sizeof(struct dbg_line *);
linev = *linevp ? realloc(*linevp, nsize) : malloc(nsize);
if (!linev)
return 0;
*linevp = linev;
*lenp = nlen;
}
linev[used] = line;
return 1;
}
static int
parse_buffer(FILE *in, FILE *out)
{
struct dbg_line *line;
struct spl_debug_header *hdr;
char buf[4097], *p;
unsigned long dropped = 0, kept = 0;
struct dbg_line **linev = NULL;
const int phl = sizeof(hdr->ph_len);
const int phf = sizeof(hdr->ph_flags);
int rc, linev_len = 0;
while (1) {
rc = fread(buf, phl + phf, 1, in);
if (rc <= 0)
break;
hdr = (void *)buf;
if (hdr->ph_len == 0)
break;
if (hdr->ph_len > 4094) {
fprintf(stderr, "unexpected large record: %d bytes. "
"aborting.\n", hdr->ph_len);
break;
}
rc = fread(buf + phl + phf, 1, hdr->ph_len - phl - phf, in);
if (rc <= 0)
break;
if (hdr->ph_mask &&
(!(spl_debug_subsystem & hdr->ph_subsys) ||
(!(spl_debug_mask & hdr->ph_mask)))) {
dropped++;
continue;
}
line = malloc(sizeof(*line));
if (line == NULL) {
fprintf(stderr, "malloc failed; printing accumulated "
"records and exiting.\n");
break;
}
line->hdr = malloc(hdr->ph_len + 1);
if (line->hdr == NULL) {
free(line);
fprintf(stderr, "malloc failed; printing accumulated "
"records and exiting.\n");
break;
}
p = (void *)line->hdr;
memcpy(line->hdr, buf, hdr->ph_len);
p[hdr->ph_len] = '\0';
p += sizeof(*hdr);
line->file = p;
p += strlen(line->file) + 1;
line->fn = p;
p += strlen(line->fn) + 1;
line->text = p;
if (!add_rec(line, &linev, &linev_len, kept)) {
fprintf(stderr, "malloc failed; printing accumulated "
"records and exiting.\n");
break;
}
kept++;
}
if (linev) {
qsort(linev, kept, sizeof(struct dbg_line *), cmp_rec);
print_rec(linev, kept, out);
}
printf("Debug log: %lu lines, %lu kept, %lu dropped.\n",
dropped + kept, kept, dropped);
return 0;
}
int
main(int argc, char *argv[])
{
int fdin, fdout;
FILE *in, *out = stdout;
int rc, o_lf = 0;
if (argc > 3 || argc < 2) {
fprintf(stderr, "usage: %s <input> [output]\n", argv[0]);
return 0;
}
#ifdef __USE_LARGEFILE64
o_lf = O_LARGEFILE;
#endif
fdin = open(argv[1], O_RDONLY | o_lf);
if (fdin == -1) {
fprintf(stderr, "open(%s) failed: %s\n", argv[1],
strerror(errno));
return 1;
}
in = fdopen(fdin, "r");
if (in == NULL) {
fprintf(stderr, "fopen(%s) failed: %s\n", argv[1],
strerror(errno));
close(fdin);
return 1;
}
if (argc > 2) {
fdout = open(argv[2], O_CREAT | O_TRUNC | O_WRONLY | o_lf, 0600);
if (fdout == -1) {
fprintf(stderr, "open(%s) failed: %s\n", argv[2],
strerror(errno));
fclose(in);
return 1;
}
out = fdopen(fdout, "w");
if (out == NULL) {
fprintf(stderr, "fopen(%s) failed: %s\n", argv[2],
strerror(errno));
fclose(in);
close(fdout);
return 1;
}
}
rc = parse_buffer(in, out);
fclose(in);
if (out != stdout)
fclose(out);
return rc;
}
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