8316468: os::write incorrectly handles partial write

Man Cao · Man Cao · commit 7ce5bd159024 · 2023-09-19T20:06:40.000Z
Reviewed-by: dholmes, shade
diff --git a/src/hotspot/share/runtime/os.cpp b/src/hotspot/share/runtime/os.cpp
@@ -1439,7 +1439,7 @@ bool os::write(int fd, const void *buf, size_t nBytes) {
     if (res == OS_ERR) {
       return false;
     }
-    buf = (void *)((char *)buf + nBytes);
+    buf = (void *)((char *)buf + res);
     nBytes -= res;
   }
 

Original file line number	Diff line number	Diff line change
`@@ -1439,7 +1439,7 @@ bool os::write(int fd, const void *buf, size_t nBytes) {`
`1439`	`1439`	`if (res == OS_ERR) {`
`1440`	`1440`	`return false;`
`1441`	`1441`	`}`
`1442`		`- buf = (void )((char )buf + nBytes);`
	`1442`	`+ buf = (void )((char )buf + res);`
`1443`	`1443`	`nBytes -= res;`
`1444`	`1444`	`}`
`1445`	`1445`