From 959a5e7d04375933eeb3d6d01be47ae445cf7582 Mon Sep 17 00:00:00 2001
From: "Costa Tsaousis (ktsaou)" <costa@tsaousis.gr>
Date: Fri, 18 Dec 2015 21:08:24 +0200
Subject: [PATCH] fixed the bug where randomly chart dimensions were hidden -
 it was caused due to unitialized use of allocated space

---
 netdata-installer.sh |  2 +-
 src/main.c           |  4 ++++
 src/rrd2json.c       | 10 ++++++++--
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/netdata-installer.sh b/netdata-installer.sh
index 82985472..91a09f3c 100755
--- a/netdata-installer.sh
+++ b/netdata-installer.sh
@@ -105,7 +105,7 @@ run ./configure \
 	--sysconfdir="${NETDATA_PREFIX}/etc" \
 	--localstatedir="${NETDATA_PREFIX}/var" \
 	--with-zlib --with-math --with-user=netdata \
-	CFLAGS="-O2" || exit 1
+	CFLAGS="-O3" || exit 1
 
 # remove the build_error hook
 trap - EXIT
diff --git a/src/main.c b/src/main.c
index c35dd71e..11d69cdb 100755
--- a/src/main.c
+++ b/src/main.c
@@ -430,6 +430,10 @@ int main(int argc, char **argv)
 	// catch all signals
 	for (i = 1 ; i < 65 ;i++) {
 		switch(i) {
+			case SIGKILL: // not catchable
+			case SIGSTOP: // not catchable
+				break;
+
 			case SIGSEGV:
 			case SIGFPE:
 			case SIGCHLD:
diff --git a/src/rrd2json.c b/src/rrd2json.c
index 675d158a..028824dd 100755
--- a/src/rrd2json.c
+++ b/src/rrd2json.c
@@ -1082,6 +1082,13 @@ static RRDR *rrdr_create(RRDSET *st, int n)
 	r->od = malloc(r->d * sizeof(uint8_t));
 	if(unlikely(!r->od)) goto cleanup;
 
+	// set the hidden flag on hidden dimensions
+	int c;
+	for(c = 0, rd = st->dimensions ; rd ; c++, rd = rd->next) {
+		if(unlikely(rd->flags & RRDDIM_FLAG_HIDDEN)) r->od[c] = RRDR_HIDDEN;
+		else r->od[c] = 0;
+	}
+
 	r->c = -1;
 
 	r->group = 1;
@@ -1346,11 +1353,10 @@ RRDR *rrd2rrdr(RRDSET *st, long points, long long after, long long before, int g
 			calculated_number *cn = rrdr_line_values(r);
 			uint8_t *co = rrdr_line_options(r);
 
-			for(rd = st->dimensions, c = 0 ; likely(rd && c < dimensions) ; rd = rd->next, c++) {
+			for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
 
 				// update the dimension options
 				if(likely(found_non_zero[c])) r->od[c] |= RRDR_NONZERO;
-				if(unlikely(rd->flags & RRDDIM_FLAG_HIDDEN)) r->od[c] |= RRDR_HIDDEN;
 
 				// store the specific point options
 				co[c] = group_options[c];
-- 
2.39.2