From: Alex Rønne Petersen <alexrp@xamarin.com>
Date: Mon, 12 Sep 2016 08:44:00 +0000 (+0200)
Subject: [profiler] Don't flush empty log buffers.
X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=commitdiff_plain;h=4533cd91b27686c4e453323ce90fb432db33a790;p=mono.git

[profiler] Don't flush empty log buffers.
---

diff --git a/mono/profiler/mono-profiler-log.c b/mono/profiler/mono-profiler-log.c
index 0785378f04b..87bf160c10a 100644
--- a/mono/profiler/mono-profiler-log.c
+++ b/mono/profiler/mono-profiler-log.c
@@ -1337,24 +1337,26 @@ dump_buffer (MonoProfiler *profiler, LogBuffer *buf)
 	if (buf->next)
 		dump_buffer (profiler, buf->next);
 
-	p = write_int32 (p, BUF_ID);
-	p = write_int32 (p, buf->cursor - buf->buf);
-	p = write_int64 (p, buf->time_base);
-	p = write_int64 (p, buf->ptr_base);
-	p = write_int64 (p, buf->obj_base);
-	p = write_int64 (p, buf->thread_id);
-	p = write_int64 (p, buf->method_base);
+	if (buf->cursor - buf->buf) {
+		p = write_int32 (p, BUF_ID);
+		p = write_int32 (p, buf->cursor - buf->buf);
+		p = write_int64 (p, buf->time_base);
+		p = write_int64 (p, buf->ptr_base);
+		p = write_int64 (p, buf->obj_base);
+		p = write_int64 (p, buf->thread_id);
+		p = write_int64 (p, buf->method_base);
 
 #if defined (HAVE_SYS_ZLIB)
-	if (profiler->gzfile) {
-		gzwrite (profiler->gzfile, hbuf, p - hbuf);
-		gzwrite (profiler->gzfile, buf->buf, buf->cursor - buf->buf);
-	} else
+		if (profiler->gzfile) {
+			gzwrite (profiler->gzfile, hbuf, p - hbuf);
+			gzwrite (profiler->gzfile, buf->buf, buf->cursor - buf->buf);
+		} else
 #endif
-	{
-		fwrite (hbuf, p - hbuf, 1, profiler->file);
-		fwrite (buf->buf, buf->cursor - buf->buf, 1, profiler->file);
-		fflush (profiler->file);
+		{
+			fwrite (hbuf, p - hbuf, 1, profiler->file);
+			fwrite (buf->buf, buf->cursor - buf->buf, 1, profiler->file);
+			fflush (profiler->file);
+		}
 	}
 
 	free_buffer (buf, buf->size);