From a51b19f667731104d1277df71b26daa2d3816189 Mon Sep 17 00:00:00 2001
From: Michael Beck <beck@ipd.info.uni-karlsruhe.de>
Date: Wed, 21 Jun 2006 17:46:15 +0000
Subject: [PATCH] make sure a '\0' is at the end of an snprintf'ed string

---
 ir/be/benode.c     | 1 +
 ir/be/beraextern.c | 1 +
 ir/be/bespill.c    | 2 ++
 ir/be/beutil.c     | 1 +
 ir/be/beutil.h     | 1 +
 5 files changed, 6 insertions(+)

diff --git a/ir/be/benode.c b/ir/be/benode.c
index 5bad46892..3cc8b4239 100644
--- a/ir/be/benode.c
+++ b/ir/be/benode.c
@@ -1317,6 +1317,7 @@ static void dump_node_req(FILE *f, int idx, be_req_t *req)
 	const char *prefix = buf;
 
 	snprintf(buf, sizeof(buf), "#%d ", idx);
+	buf[sizeof(buf) - 1] = '\0';
 
 	if(req->flags != arch_irn_flags_none) {
 		fprintf(f, "%sflags: ", prefix);
diff --git a/ir/be/beraextern.c b/ir/be/beraextern.c
index 2bf3a004d..f0dd30490 100644
--- a/ir/be/beraextern.c
+++ b/ir/be/beraextern.c
@@ -475,6 +475,7 @@ static void execute(char *prog_to_call, char *out_file, char *result_file) {
 	int ret_status;
 
 	snprintf(cmd_line, sizeof(cmd_line), "%s -i %s -o %s", prog_to_call, out_file, result_file);
+	cmd_line[sizeof(cmd_line) - 1] = '\0';
 
 	ret_status = system(cmd_line);
 	assert(ret_status != -1 && "Invokation of external register allocator failed");
diff --git a/ir/be/bespill.c b/ir/be/bespill.c
index aabdbfec2..94c22c97e 100644
--- a/ir/be/bespill.c
+++ b/ir/be/bespill.c
@@ -799,6 +799,7 @@ static ir_type *get_spill_type(pmap *types, spill_slot_t *ss) {
 	if (! e) {
 		char buf[64];
 		snprintf(buf, sizeof(buf), "spill_slot_type_%s", get_mode_name(ss->largest_mode));
+		buf[sizeof(buf) - 1] = '\0';
 		res = new_type_primitive(new_id_from_str(buf), ss->largest_mode);
 		set_type_alignment_bytes(res, ss->align);
 		pmap_insert(types, ss->largest_mode, res);
@@ -840,6 +841,7 @@ static void assign_entities(ss_env_t *ssenv, int n_slots, spill_slot_t *ss[]) {
 
 		/* build entity */
 		snprintf(buf, sizeof(buf), "spill_slot_%d", i);
+		buf[sizeof(buf) - 1] = '\0';
 		name = new_id_from_str(buf);
 
 		spill_ent = new_entity(frame, name, get_spill_type(ssenv->types, ss[i]));
diff --git a/ir/be/beutil.c b/ir/be/beutil.c
index 18effda0f..844fcf27f 100644
--- a/ir/be/beutil.c
+++ b/ir/be/beutil.c
@@ -182,6 +182,7 @@ void be_dump(ir_graph *irg, const char *suffix, void (*dumper)(ir_graph *, const
 	}
 
 	snprintf(buf, sizeof(buf), "-%02d%s", nr++, suffix);
+	buf[sizeof(buf) - 1] = '\0';
 	dumper(irg, buf);
 }
 
diff --git a/ir/be/beutil.h b/ir/be/beutil.h
index d1b1eb03a..ae193f5bb 100644
--- a/ir/be/beutil.h
+++ b/ir/be/beutil.h
@@ -87,6 +87,7 @@ static INLINE FILE *ffopen(const char *base, const char *ext, const char *mode)
 	char buf[1024];
 
 	snprintf(buf, sizeof(buf), "%s.%s", base, ext);
+	buf[sizeof(buf) - 1] = '\0';
 	if (! (out = fopen(buf, mode))) {
 		fprintf(stderr, "Cannot open file %s in mode %s\n", buf, mode);
 		return NULL;
-- 
2.20.1