From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761122Ab2CNQ7B (ORCPT ); Wed, 14 Mar 2012 12:59:01 -0400 Received: from casper.infradead.org ([85.118.1.10]:59646 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757955Ab2CNQ66 (ORCPT ); Wed, 14 Mar 2012 12:58:58 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , Anton Blanchard , Eric B Munson , David Ahern , Frederic Weisbecker , Mike Galbraith , Paul Mackerras , Peter Zijlstra , Stephane Eranian , Yanmin Zhang , stable@kernel.org Subject: [PATCH 2/3] perf tools: Use scnprintf where applicable Date: Wed, 14 Mar 2012 13:58:41 -0300 Message-Id: <1331744322-18917-3-git-send-email-acme@infradead.org> X-Mailer: git-send-email 1.7.9.2.358.g22243 In-Reply-To: <1331744322-18917-1-git-send-email-acme@infradead.org> References: <1331744322-18917-1-git-send-email-acme@infradead.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arnaldo Carvalho de Melo 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 Cc: Anton Blanchard Cc: Eric B Munson Cc: David Ahern Cc: Frederic Weisbecker Cc: Mike Galbraith Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Yanmin Zhang Cc: stable@kernel.org Link: http://lkml.kernel.org/n/tip-kwxo2eh29cxmd8ilixi2005x@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- 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(-) diff --git a/tools/perf/arch/powerpc/util/header.c b/tools/perf/arch/powerpc/util/header.c index eba80c2..2f7073d 100644 --- 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, '$')) { diff --git a/tools/perf/arch/x86/util/header.c b/tools/perf/arch/x86/util/header.c index f940060..146d12a 100644 --- a/tools/perf/arch/x86/util/header.c +++ b/tools/perf/arch/x86/util/header.c @@ -48,7 +48,7 @@ get_cpuid(char *buffer, size_t sz) if (family >= 0x6) model += ((a >> 16) & 0xf) << 4; } - nb = snprintf(buffer, sz, "%s,%u,%u,%u$", vendor, family, model, step); + nb = scnprintf(buffer, sz, "%s,%u,%u,%u$", vendor, family, model, step); /* look for end marker to ensure the entire data fit */ if (strchr(buffer, '$')) { diff --git a/tools/perf/util/color.c b/tools/perf/util/color.c index 521c38a..11e46da 100644 --- a/tools/perf/util/color.c +++ b/tools/perf/util/color.c @@ -1,3 +1,4 @@ +#include #include "cache.h" #include "color.h" @@ -182,12 +183,12 @@ static int __color_vsnprintf(char *bf, size_t size, const char *color, } 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; } diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index ecd7f4d..14bb035 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -280,7 +280,7 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, 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; @@ -295,7 +295,7 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, 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)) diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c index 6f505d1..e11e482 100644 --- a/tools/perf/util/hist.c +++ b/tools/perf/util/hist.c @@ -768,7 +768,7 @@ static int hist_entry__pcnt_snprintf(struct hist_entry *he, char *s, 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, @@ -791,20 +791,20 @@ static int hist_entry__pcnt_snprintf(struct hist_entry *he, char *s, } } } 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) { @@ -819,25 +819,25 @@ static int hist_entry__pcnt_snprintf(struct hist_entry *he, char *s, 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); } } @@ -855,7 +855,7 @@ int hist_entry__snprintf(struct hist_entry *he, char *s, size_t size, 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)); } diff --git a/tools/perf/util/strbuf.c b/tools/perf/util/strbuf.c index 92e0685..2eeb51b 100644 --- a/tools/perf/util/strbuf.c +++ b/tools/perf/util/strbuf.c @@ -1,4 +1,5 @@ #include "cache.h" +#include int prefixcmp(const char *str, const char *prefix) { @@ -89,14 +90,14 @@ void strbuf_addf(struct strbuf *sb, const char *fmt, ...) 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"); diff --git a/tools/perf/util/ui/browsers/hists.c b/tools/perf/util/ui/browsers/hists.c index e81aef1..bb9197c 100644 --- a/tools/perf/util/ui/browsers/hists.c +++ b/tools/perf/util/ui/browsers/hists.c @@ -837,15 +837,15 @@ static int hists__browser_title(struct hists *self, char *bf, size_t size, 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; } @@ -1095,7 +1095,7 @@ static void perf_evsel_menu__write(struct ui_browser *browser, 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); @@ -1105,8 +1105,8 @@ static void perf_evsel_menu__write(struct ui_browser *browser, 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; } diff --git a/tools/perf/util/ui/helpline.c b/tools/perf/util/ui/helpline.c index 4f48f59..2f950c2 100644 --- a/tools/perf/util/ui/helpline.c +++ b/tools/perf/util/ui/helpline.c @@ -64,7 +64,7 @@ int ui_helpline__show_help(const char *format, va_list ap) 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; -- 1.7.9.2.358.g22243