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patch 7.4.1791

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Problem:    Channel could be garbage collected too early.
Solution:   Don't free a channel or remove it from a job when it is still
            useful.
This commit is contained in:
Bram Moolenaar
2016-04-26 20:30:07 +02:00
parent 6231cb8b5b
commit 674127e180
2 changed files with 14 additions and 5 deletions
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17
src/channel.c
View File

@@ -439,7 +439,8 @@ free_unused_channels_contents(int copyID, int mask)
channel_T *ch;
for (ch = first_channel; ch != NULL; ch = ch->ch_next)
if ((ch->ch_copyID & mask) != (copyID & mask))
if (!channel_still_useful(ch)
&& (ch->ch_copyID & mask) != (copyID & mask))
{
/* Free the channel and ordinary items it contains, but don't
* recurse into Lists, Dictionaries etc. */
@@ -458,7 +459,8 @@ free_unused_channels(int copyID, int mask)
for (ch = first_channel; ch != NULL; ch = ch_next)
{
ch_next = ch->ch_next;
if ((ch->ch_copyID & mask) != (copyID & mask))
if (!channel_still_useful(ch)
&& (ch->ch_copyID & mask) != (copyID & mask))
{
/* Free the channel struct itself. */
channel_free_channel(ch);
@@ -4079,13 +4081,16 @@ job_free(job_T *job)
/*
* Return TRUE if the job should not be freed yet. Do not free the job when
* it has not ended yet and there is a "stoponexit" flag or an exit callback.
* it has not ended yet and there is a "stoponexit" flag, an exit callback
* or when the associated channel will do something with the job output.
*/
static int
job_still_useful(job_T *job)
{
return job->jv_status == JOB_STARTED
&& (job->jv_stoponexit != NULL || job->jv_exit_cb != NULL);
&& (job->jv_stoponexit != NULL || job->jv_exit_cb != NULL
|| (job->jv_channel != NULL
&& channel_still_useful(job->jv_channel)));
}
void
@@ -4099,10 +4104,12 @@ job_unref(job_T *job)
{
job_free(job);
}
else if (job->jv_channel != NULL)
else if (job->jv_channel != NULL
&& !channel_still_useful(job->jv_channel))
{
/* Do remove the link to the channel, otherwise it hangs
* around until Vim exits. See job_free() for refcount. */
ch_log(job->jv_channel, "detaching channel from job");
job->jv_channel->ch_job = NULL;
channel_unref(job->jv_channel);
job->jv_channel = NULL;

2
src/version.c
View File

@@ -753,6 +753,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
1791,
/**/
1790,
/**/