From e7f01d1e3d8d501deb8abeaa269d5d48a703b8b0 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Wed, 14 Mar 2012 12:29:29 -0300 Subject: perf tools: Use scnprintf where applicable 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(-) (limited to 'tools/perf') diff --git a/tools/perf/arch/powerpc/util/header.c b/tools/perf/arch/powerpc/util/header.c index eba80c29294..2f7073d107f 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, '$')) { diff --git a/tools/perf/arch/x86/util/header.c b/tools/perf/arch/x86/util/header.c index f94006068d2..146d12a1cec 100644 --- a/tools/perf/arch/x86/util/header.c +++ b/tools/perf/arch/x86/util/header.c @@ -48,7 +48,7 @@ get_cpuid(char *buffer, size_t sz) if (family >= 0x6) model += ((a >> 16) & 0xf) << 4; } - nb = snprintf(buffer, sz, "%s,%u,%u,%u$", 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 521c38a7919..11e46da17bb 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 ecd7f4dd7ee..14bb035c5fd 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 6f505d1abac..e11e482bd18 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 92e068517c1..2eeb51baf07 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 e81aef1f256..bb9197c9c4a 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 4f48f5901b3..2f950c2641c 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; -- cgit v1.2.3