tdevdraw/OSX: correct access to reply buffer (fixes rpc tag crash) - plan9port - [fork] Plan 9 from user space
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---
DIR commit 607880ce788bbfb8585271af117a52e9359324dd
DIR parent 6c99870701d4a71d429a26f357859416c875b2fb
HTML Author: Russ Cox <rsc@swtch.com>
Date: Wed, 8 Oct 2008 14:59:32 -0700
devdraw/OSX: correct access to reply buffer (fixes rpc tag crash)
Diffstat:
M src/cmd/devdraw/osx-srv.c | 4 ++++
1 file changed, 4 insertions(+), 0 deletions(-)
---
DIR diff --git a/src/cmd/devdraw/osx-srv.c b/src/cmd/devdraw/osx-srv.c
t@@ -289,6 +289,7 @@ runmsg(Wsysmsg *m)
/*
* Reply to m.
*/
+QLock replylock;
void
replymsg(Wsysmsg *m)
{
t@@ -303,6 +304,8 @@ replymsg(Wsysmsg *m)
if(trace) fprint(2, "-> %W\n", m);
/* copy to output buffer */
n = sizeW2M(m);
+
+ qlock(&replylock);
if(n > nmbuf){
free(mbuf);
mbuf = malloc(n);
t@@ -313,6 +316,7 @@ replymsg(Wsysmsg *m)
convW2M(m, mbuf, n);
if(write(4, mbuf, n) != n)
sysfatal("write: %r");
+ qunlock(&replylock);
}
/*