From: Greg KH <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org,
alan@lxorguk.ukuu.org.uk, Anton Blanchard <anton@samba.org>,
Eric B Munson <emunson@mgebm.net>,
David Ahern <dsahern@gmail.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Mike Galbraith <efault@gmx.de>, Paul Mackerras <paulus@samba.org>,
Peter Zijlstra <peterz@infradead.org>,
Stephane Eranian <eranian@google.com>,
Yanmin Zhang <yanmin_zhang@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [ 5/9] perf tools: Use scnprintf where applicable
Date: Wed, 21 Mar 2012 14:15:37 -0700 [thread overview]
Message-ID: <20120321211533.187688008@linuxfoundation.org> (raw)
In-Reply-To: <20120321211539.GA28899@kroah.com>
3.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Arnaldo Carvalho de Melo <acme@redhat.com>
commit e7f01d1e3d8d501deb8abeaa269d5d48a703b8b0 upstream.
Several places were expecting that the value returned was the number of
characters printed, not what would be printed if there was space.
Fix it by using the scnprintf and vscnprintf variants we inherited from
the kernel sources.
Some corner cases where the number of printed characters were not
accounted were fixed too.
Reported-by: Anton Blanchard <anton@samba.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Eric B Munson <emunson@mgebm.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Yanmin Zhang <yanmin_zhang@linux.intel.com>
Link: http://lkml.kernel.org/n/tip-kwxo2eh29cxmd8ilixi2005x@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
tools/perf/arch/powerpc/util/header.c | 2 +-
tools/perf/arch/x86/util/header.c | 2 +-
tools/perf/util/color.c | 9 +++++----
tools/perf/util/header.c | 4 ++--
tools/perf/util/hist.c | 30 +++++++++++++++---------------
tools/perf/util/strbuf.c | 7 ++++---
tools/perf/util/ui/browsers/hists.c | 12 ++++++------
tools/perf/util/ui/helpline.c | 2 +-
8 files changed, 35 insertions(+), 33 deletions(-)
--- a/tools/perf/arch/powerpc/util/header.c
+++ b/tools/perf/arch/powerpc/util/header.c
@@ -25,7 +25,7 @@ get_cpuid(char *buffer, size_t sz)
pvr = mfspr(SPRN_PVR);
- nb = snprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr));
+ nb = scnprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr));
/* look for end marker to ensure the entire data fit */
if (strchr(buffer, '$')) {
--- a/tools/perf/arch/x86/util/header.c
+++ b/tools/perf/arch/x86/util/header.c
@@ -48,7 +48,7 @@ get_cpuid(char *buffer, size_t sz)
if (family >= 0x6)
model += ((a >> 16) & 0xf) << 4;
}
- nb = snprintf(buffer, sz, "%s,%u,%u,%u$", vendor, family, model, step);
+ nb = scnprintf(buffer, sz, "%s,%u,%u,%u$", vendor, family, model, step);
/* look for end marker to ensure the entire data fit */
if (strchr(buffer, '$')) {
--- a/tools/perf/util/color.c
+++ b/tools/perf/util/color.c
@@ -1,3 +1,4 @@
+#include <linux/kernel.h>
#include "cache.h"
#include "color.h"
@@ -182,12 +183,12 @@ static int __color_vsnprintf(char *bf, s
}
if (perf_use_color_default && *color)
- r += snprintf(bf, size, "%s", color);
- r += vsnprintf(bf + r, size - r, fmt, args);
+ r += scnprintf(bf, size, "%s", color);
+ r += vscnprintf(bf + r, size - r, fmt, args);
if (perf_use_color_default && *color)
- r += snprintf(bf + r, size - r, "%s", PERF_COLOR_RESET);
+ r += scnprintf(bf + r, size - r, "%s", PERF_COLOR_RESET);
if (trail)
- r += snprintf(bf + r, size - r, "%s", trail);
+ r += scnprintf(bf + r, size - r, "%s", trail);
return r;
}
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1227,7 +1227,7 @@ int build_id_cache__add_s(const char *sb
if (realname == NULL || filename == NULL || linkname == NULL)
goto out_free;
- len = snprintf(filename, size, "%s%s%s",
+ len = scnprintf(filename, size, "%s%s%s",
debugdir, is_kallsyms ? "/" : "", realname);
if (mkdir_p(filename, 0755))
goto out_free;
@@ -1242,7 +1242,7 @@ int build_id_cache__add_s(const char *sb
goto out_free;
}
- len = snprintf(linkname, size, "%s/.build-id/%.2s",
+ len = scnprintf(linkname, size, "%s/.build-id/%.2s",
debugdir, sbuild_id);
if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -767,7 +767,7 @@ static int hist_entry__pcnt_snprintf(str
sep ? "%.2f" : " %6.2f%%",
(period * 100.0) / total);
else
- ret = snprintf(s, size, sep ? "%.2f" : " %6.2f%%",
+ ret = scnprintf(s, size, sep ? "%.2f" : " %6.2f%%",
(period * 100.0) / total);
if (symbol_conf.show_cpu_utilization) {
ret += percent_color_snprintf(s + ret, size - ret,
@@ -790,20 +790,20 @@ static int hist_entry__pcnt_snprintf(str
}
}
} else
- ret = snprintf(s, size, sep ? "%" PRIu64 : "%12" PRIu64 " ", period);
+ ret = scnprintf(s, size, sep ? "%" PRIu64 : "%12" PRIu64 " ", period);
if (symbol_conf.show_nr_samples) {
if (sep)
- ret += snprintf(s + ret, size - ret, "%c%" PRIu64, *sep, nr_events);
+ ret += scnprintf(s + ret, size - ret, "%c%" PRIu64, *sep, nr_events);
else
- ret += snprintf(s + ret, size - ret, "%11" PRIu64, nr_events);
+ ret += scnprintf(s + ret, size - ret, "%11" PRIu64, nr_events);
}
if (symbol_conf.show_total_period) {
if (sep)
- ret += snprintf(s + ret, size - ret, "%c%" PRIu64, *sep, period);
+ ret += scnprintf(s + ret, size - ret, "%c%" PRIu64, *sep, period);
else
- ret += snprintf(s + ret, size - ret, " %12" PRIu64, period);
+ ret += scnprintf(s + ret, size - ret, " %12" PRIu64, period);
}
if (pair_hists) {
@@ -818,25 +818,25 @@ static int hist_entry__pcnt_snprintf(str
diff = new_percent - old_percent;
if (fabs(diff) >= 0.01)
- snprintf(bf, sizeof(bf), "%+4.2F%%", diff);
+ ret += scnprintf(bf, sizeof(bf), "%+4.2F%%", diff);
else
- snprintf(bf, sizeof(bf), " ");
+ ret += scnprintf(bf, sizeof(bf), " ");
if (sep)
- ret += snprintf(s + ret, size - ret, "%c%s", *sep, bf);
+ ret += scnprintf(s + ret, size - ret, "%c%s", *sep, bf);
else
- ret += snprintf(s + ret, size - ret, "%11.11s", bf);
+ ret += scnprintf(s + ret, size - ret, "%11.11s", bf);
if (show_displacement) {
if (displacement)
- snprintf(bf, sizeof(bf), "%+4ld", displacement);
+ ret += scnprintf(bf, sizeof(bf), "%+4ld", displacement);
else
- snprintf(bf, sizeof(bf), " ");
+ ret += scnprintf(bf, sizeof(bf), " ");
if (sep)
- ret += snprintf(s + ret, size - ret, "%c%s", *sep, bf);
+ ret += scnprintf(s + ret, size - ret, "%c%s", *sep, bf);
else
- ret += snprintf(s + ret, size - ret, "%6.6s", bf);
+ ret += scnprintf(s + ret, size - ret, "%6.6s", bf);
}
}
@@ -854,7 +854,7 @@ int hist_entry__snprintf(struct hist_ent
if (se->elide)
continue;
- ret += snprintf(s + ret, size - ret, "%s", sep ?: " ");
+ ret += scnprintf(s + ret, size - ret, "%s", sep ?: " ");
ret += se->se_snprintf(he, s + ret, size - ret,
hists__col_len(hists, se->se_width_idx));
}
--- a/tools/perf/util/strbuf.c
+++ b/tools/perf/util/strbuf.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include <linux/kernel.h>
int prefixcmp(const char *str, const char *prefix)
{
@@ -89,14 +90,14 @@ void strbuf_addf(struct strbuf *sb, cons
if (!strbuf_avail(sb))
strbuf_grow(sb, 64);
va_start(ap, fmt);
- len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
+ len = vscnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
va_end(ap);
if (len < 0)
- die("your vsnprintf is broken");
+ die("your vscnprintf is broken");
if (len > strbuf_avail(sb)) {
strbuf_grow(sb, len);
va_start(ap, fmt);
- len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
+ len = vscnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
va_end(ap);
if (len > strbuf_avail(sb)) {
die("this should not happen, your snprintf is broken");
--- a/tools/perf/util/ui/browsers/hists.c
+++ b/tools/perf/util/ui/browsers/hists.c
@@ -839,15 +839,15 @@ static int hists__browser_title(struct h
unsigned long nr_events = self->stats.nr_events[PERF_RECORD_SAMPLE];
nr_events = convert_unit(nr_events, &unit);
- printed = snprintf(bf, size, "Events: %lu%c %s", nr_events, unit, ev_name);
+ printed = scnprintf(bf, size, "Events: %lu%c %s", nr_events, unit, ev_name);
if (thread)
- printed += snprintf(bf + printed, size - printed,
+ printed += scnprintf(bf + printed, size - printed,
", Thread: %s(%d)",
(thread->comm_set ? thread->comm : ""),
thread->pid);
if (dso)
- printed += snprintf(bf + printed, size - printed,
+ printed += scnprintf(bf + printed, size - printed,
", DSO: %s", dso->short_name);
return printed;
}
@@ -1097,7 +1097,7 @@ static void perf_evsel_menu__write(struc
HE_COLORSET_NORMAL);
nr_events = convert_unit(nr_events, &unit);
- printed = snprintf(bf, sizeof(bf), "%lu%c%s%s", nr_events,
+ printed = scnprintf(bf, sizeof(bf), "%lu%c%s%s", nr_events,
unit, unit == ' ' ? "" : " ", ev_name);
slsmg_printf("%s", bf);
@@ -1107,8 +1107,8 @@ static void perf_evsel_menu__write(struc
if (!current_entry)
ui_browser__set_color(browser, HE_COLORSET_TOP);
nr_events = convert_unit(nr_events, &unit);
- snprintf(bf, sizeof(bf), ": %ld%c%schunks LOST!", nr_events,
- unit, unit == ' ' ? "" : " ");
+ printed += scnprintf(bf, sizeof(bf), ": %ld%c%schunks LOST!",
+ nr_events, unit, unit == ' ' ? "" : " ");
warn = bf;
}
--- a/tools/perf/util/ui/helpline.c
+++ b/tools/perf/util/ui/helpline.c
@@ -65,7 +65,7 @@ int ui_helpline__show_help(const char *f
static int backlog;
pthread_mutex_lock(&ui__lock);
- ret = vsnprintf(ui_helpline__last_msg + backlog,
+ ret = vscnprintf(ui_helpline__last_msg + backlog,
sizeof(ui_helpline__last_msg) - backlog, format, ap);
backlog += ret;
next prev parent reply other threads:[~2012-03-21 21:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-21 21:15 [ 0/9] 3.2.13-stable review Greg KH
2012-03-21 21:15 ` [ 1/9] nilfs2: fix NULL pointer dereference in nilfs_load_super_block() Greg KH
2012-03-21 21:15 ` [ 2/9] afs: Read of file returns EBADMSG Greg KH
2012-03-21 21:15 ` [ 3/9] afs: Remote abort can cause BUG in rxrpc code Greg KH
2012-03-21 21:15 ` [ 4/9] perf tools: Incorrect use of snprintf results in SEGV Greg KH
2012-03-21 21:15 ` Greg KH [this message]
2012-03-21 21:15 ` [ 6/9] tcp: fix syncookie regression Greg KH
2012-03-21 21:15 ` [ 7/9] ipv6: Dont dev_hold(dev) in ip6_mc_find_dev_rcu Greg KH
2012-03-21 21:15 ` [ 8/9] iwl3945: fix possible il->txq NULL pointer dereference in delayed works Greg KH
2012-03-21 21:15 ` [ 9/9] powerpc/pmac: Fix SMP kernels on pre-core99 UP machines Greg KH
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