From c3e5ee71543148bb0468b3db469b42a505f75df9 Mon Sep 17 00:00:00 2001
From: Daniel Black <daniel.black@au.ibm.com>
Date: Tue, 13 Dec 2016 13:52:00 -0800
Subject: [PATCH] util/histogram.cc: HistogramStat::toString buffer
 insufficient

Summary:
Increased buffer size to 1650.

util/histogram.cc: In member function 'std::__cxx11::string rocksdb::HistogramStat::ToString() const':
util/histogram.cc:189:13: error: '%.2f' directive output truncated writing between 4 and 313 bytes into a region of size 0 [-Werror=format-length=]
 std::string HistogramStat::ToString() const {
             ^~~~~~~~~~~~~
util/histogram.cc:205:30: note: format output between 69 and 1614 bytes into a destination of size 200
            Percentile(99.99));
                              ^
cc1plus: all warnings being treated as errors
Makefile:1521: recipe for target 'util/histogram.o' failed
Closes https://github.com/facebook/rocksdb/pull/1660

Differential Revision: D4318820

Pulled By: yiwu-arbug

fbshipit-source-id: 45ae6ea
---
 util/histogram.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/util/histogram.cc b/util/histogram.cc
index 1e63c39b3..87373c588 100644
--- a/util/histogram.cc
+++ b/util/histogram.cc
@@ -189,7 +189,7 @@ double HistogramStat::StandardDeviation() const {
 std::string HistogramStat::ToString() const {
   uint64_t cur_num = num();
   std::string r;
-  char buf[200];
+  char buf[1650];
   snprintf(buf, sizeof(buf),
            "Count: %" PRIu64 " Average: %.4f  StdDev: %.2f\n",
            cur_num, Average(), StandardDeviation());