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Mark Michelson ccfa1564da Add a lock and unlock prior to the destruction of the chanspy_ds ... lock to ensure that no other threads still have it locked. While this should not happen under normal circumstances, it appears that if the spyer and spyee hang up at nearly the same time, the following may occur. 1. ast_channel_free is called on the spyee's channel. 2. The chanspy datastore is removed from the spyee's channel in ast_channel_free. 3. In the spyer's thread, the spyer attempts to remove and destroy the datastore from the spyee channel, but the datastore has already been removed in step 2, so the spyer continues in the code. 4. The spyee's thread continues and calls the datastore's destroy callback, chanspy_ds_destroy. This involves locking the chanspy_ds. 5. Now the spyer attempts to destroy the chanspy_ds lock. The problem is that in step 4, the spyee has locked this lock, meaning that the spyer is attempting to destroy a lock which is currently locked by another thread. The backtrace provided in issue #12969 supports the idea that this is possible (and has even occurred). This commit does not close the issue, but should help in preventing one type of crash associated with the use of app_chanspy. git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@138886 65c4cc65-6c06-0410-ace0-fbb531ad65f3		18 years ago
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Makefile	remove this, it has been moved to the main Makefile	18 years ago
app_adsiprog.c	…
app_alarmreceiver.c	…
app_amd.c	From bugtracker: "fix totalAnalysisTime to handle periods of no channel activity"	19 years ago
app_authenticate.c	Remove a needless (and incorrect) call to feof() after fgets().	19 years ago
app_cdr.c	…
app_chanisavail.c	…
app_channelredirect.c	…
app_chanspy.c	Add a lock and unlock prior to the destruction of the chanspy_ds	18 years ago
app_controlplayback.c	…
app_dahdibarge.c	build against the now-typedef-free dahdi/user.h	18 years ago
app_dahdiras.c	build against the now-typedef-free dahdi/user.h	18 years ago
app_dahdiscan.c	build against the now-typedef-free dahdi/user.h	18 years ago
app_db.c	…
app_dial.c	(closes issue #12982)	18 years ago
app_dictate.c	…
app_directed_pickup.c	…
app_directory.c	…
app_disa.c	Adds DAHDI support alongside Zaptel. DAHDI usage favored, but all Zap stuff should continue working. Release announcement to follow.	18 years ago
app_dumpchan.c	…
app_echo.c	…
app_exec.c	Fix a minor spelling error.	19 years ago
app_externalivr.c	Detect another way for a connection to have gone away.	19 years ago
app_festival.c	…
app_flash.c	build against the now-typedef-free dahdi/user.h	18 years ago
app_followme.c	Fix a couple uses of sprintf. The second one could actually cause an overflow	19 years ago
app_forkcdr.c	(closes issue #12910)	18 years ago
app_getcpeid.c	Adds DAHDI support alongside Zaptel. DAHDI usage favored, but all Zap stuff should continue working. Release announcement to follow.	18 years ago
app_hasnewvoicemail.c	…
app_ices.c	make app_ices compile on OpenBSD.	18 years ago
app_image.c	…
app_ivrdemo.c	…
app_lookupblacklist.c	…
app_lookupcidname.c	…
app_macro.c	app_macro only needs a rdlock on the contexts list.	19 years ago
app_meetme.c	remove some more chan_zap references	18 years ago
app_milliwatt.c	- Fix a typo in the argument to Playtones	18 years ago
app_mixmonitor.c	Add a trigger mode that triggers on both read and write. The actual function that returns the combined audio frame though will wait until both sides have fed in audio, or until one side stops (such as the case when you call Wait).	19 years ago
app_morsecode.c	…
app_mp3.c	…
app_nbscat.c	…
app_osplookup.c	…
app_page.c	Adds DAHDI support alongside Zaptel. DAHDI usage favored, but all Zap stuff should continue working. Release announcement to follow.	18 years ago
app_parkandannounce.c	(closes issue #12193)	18 years ago
app_playback.c	Ensure that help text terminates with a newline	19 years ago
app_privacy.c	…
app_queue.c	Change the inequalities used in app_queue with regards	18 years ago
app_random.c	…
app_read.c	Adds DAHDI support alongside Zaptel. DAHDI usage favored, but all Zap stuff should continue working. Release announcement to follow.	18 years ago
app_readfile.c	…
app_realtime.c	…
app_record.c	…
app_rpt.c	allow tonezone to live in a different place than DAHDI/Zaptel, since dahdi-tools and dahdi-linux are now separate packages and can be installed in different places	18 years ago
app_sayunixtime.c	…
app_senddtmf.c	…
app_sendtext.c	Fix a bug where SENDTEXTSTATUS isn't set properly when it isn't	18 years ago
app_setcallerid.c	For consistency sake, ensure that the values that ${CALLINGPRES} returns are valid as an	19 years ago
app_setcdruserfield.c	…
app_settransfercapability.c	…
app_skel.c	Revert inadvertent changes to app_skel that occurred when	18 years ago
app_sms.c	stop checking for mktime() in the configure script... we don't use it, and the test is buggy under gcc 4.3	19 years ago
app_softhangup.c	…
app_speech_utils.c	Safely use the strncat() function.	19 years ago
app_stack.c	…
app_system.c	…
app_talkdetect.c	…
app_test.c	…
app_transfer.c	…
app_url.c	…
app_userevent.c	…
app_verbose.c	…
app_voicemail.c	work around a bug in gcc-4.2.3 that incorrectly ignores the casting away of 'const' for pointers when the developer knows it is safe to do so	18 years ago
app_waitforring.c	…
app_waitforsilence.c	…
app_while.c	…
app_zapateller.c	…
enter.h	…
leave.h	…
rpt_flow.pdf	…