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Retire legacy debugging infrastructure

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When the SPL was originally written Linux tracepoints were still
in their infancy.  Therefore, an entire debugging subsystem was
added to facilite tracing which served us well for many years.

Now that Linux tracepoints have matured they provide all the
functionality of the previous tracing subsystem.  Rather than
maintain parallel functionality it makes sense to fully adopt
tracepoints.  Therefore, this patch retires the legacy debugging
infrastructure.

See zfsonlinux/zfs@bc9f413 for the tracepoint changes.

Signed-off-by: Ned Bass <bass6@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #408
This commit is contained in:
Brian Behlendorf
2014-11-05 17:30:35 -05:00
parent 917fef2732
commit 8d9a23e82c
26 changed files with 397 additions and 3008 deletions
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cmd/Makefile.am
-3
View File
@@ -3,11 +3,8 @@ include $(top_srcdir)/config/Rules.am
DEFAULT_INCLUDES += \
-I$(top_srcdir)/lib
noinst_PROGRAMS = spl
sbin_PROGRAMS = splat
spl_SOURCES = spl.c
splat_SOURCES = splat.c
splat_LDFLAGS = $(top_builddir)/lib/libcommon.la
cmd/spl.c
-243
View File
@@ -1,243 +0,0 @@
/*****************************************************************************\
* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
* Copyright (C) 2007 The Regents of the University of California.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
* UCRL-CODE-235197
*
* This file is part of the SPL, Solaris Porting Layer.
* For details, see <http://zfsonlinux.org/>.
*
* The SPL is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* The SPL is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
*****************************************************************************
* Solaris Porting Layer (SPL) User Space Interface.
\*****************************************************************************/
#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;
}