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dragonwell8_jdk
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240ad09d
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dragonwell8_jdk
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体验新版 GitCode,发现更多精彩内容 >>
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240ad09d
编写于
3月 10, 2008
作者:
M
martin
浏览文件
操作
浏览文件
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电子邮件补丁
差异文件
6671051: (process) Runtime.exec() hangs if signalled during fork/exec
Reviewed-by: iris
上级
8dc14c73
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
38 addition
and
1 deletion
+38
-1
src/solaris/native/java/lang/UNIXProcess_md.c
src/solaris/native/java/lang/UNIXProcess_md.c
+38
-1
未找到文件。
src/solaris/native/java/lang/UNIXProcess_md.c
浏览文件 @
240ad09d
...
...
@@ -479,6 +479,37 @@ closeSafely(int fd)
close
(
fd
);
}
/*
* Reads nbyte bytes from file descriptor fd into buf,
* The read operation is retried in case of EINTR or partial reads.
*
* Returns number of bytes read (normally nbyte, but may be less in
* case of EOF). In case of read errors, returns -1 and sets errno.
*/
static
ssize_t
readFully
(
int
fd
,
void
*
buf
,
size_t
nbyte
)
{
ssize_t
remaining
=
nbyte
;
for
(;;)
{
ssize_t
n
=
read
(
fd
,
buf
,
remaining
);
if
(
n
==
0
)
{
return
nbyte
-
remaining
;
}
else
if
(
n
>
0
)
{
remaining
-=
n
;
if
(
remaining
<=
0
)
return
nbyte
;
/* We were interrupted in the middle of reading the bytes.
* Unlikely, but possible. */
buf
=
(
void
*
)
(((
char
*
)
buf
)
+
n
);
}
else
if
(
errno
==
EINTR
)
{
/* Strange signals like SIGJVM1 are possible at any time.
* See http://www.dreamsongs.com/WorseIsBetter.html */
}
else
{
return
-
1
;
}
}
}
#ifndef __solaris__
#undef fork1
#define fork1() fork()
...
...
@@ -606,10 +637,16 @@ Java_java_lang_UNIXProcess_forkAndExec(JNIEnv *env,
/* parent process */
close
(
fail
[
1
]);
fail
[
1
]
=
-
1
;
/* See: WhyCantJohnnyExec */
if
(
read
(
fail
[
0
],
&
errnum
,
sizeof
(
errnum
))
!=
0
)
{
switch
(
readFully
(
fail
[
0
],
&
errnum
,
sizeof
(
errnum
)))
{
case
0
:
break
;
/* Exec succeeded */
case
sizeof
(
errnum
):
waitpid
(
resultPid
,
NULL
,
0
);
throwIOException
(
env
,
errnum
,
"Exec failed"
);
goto
Catch
;
default:
throwIOException
(
env
,
errno
,
"Read failed"
);
goto
Catch
;
}
fds
[
0
]
=
(
in
[
1
]
!=
-
1
)
?
in
[
1
]
:
-
1
;
...
...
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