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* [Bug libgcj/23758] New: java::lang::ConcreteProcess::nativeSpawn unsafe @ 2005-09-07 0:18 Hans dot Boehm at hp dot com 2005-09-07 0:50 ` [Bug libgcj/23758] " pinskia at gcc dot gnu dot org 0 siblings, 1 reply; 6+ messages in thread From: Hans dot Boehm at hp dot com @ 2005-09-07 0:18 UTC (permalink / raw) To: java-prs java::lang::ConcreteProcess::nativeSpawn appears to call several functions that are not async-signal-safe between the fork and exec in the child, including _Jv_Malloc. This is unsafe by Posix rules. I'm unsure whether it can deadlock on Linux. These actions should be performed before the fork() call. I don't see why that would be particularly difficult to do here. To my knowledge, the problem may never have been observed in practice. I noticed it while reading the code, and didn't want it to get lost. -- Summary: java::lang::ConcreteProcess::nativeSpawn unsafe Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: minor Priority: P2 Component: libgcj AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: Hans dot Boehm at hp dot com CC: gcc-bugs at gcc dot gnu dot org,java-prs at gcc dot gnu dot org GCC build triplet: *-*-linux-gnu GCC host triplet: *-*-linux-gnu GCC target triplet: *-*-linux-gnu and others http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23758 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libgcj/23758] java::lang::ConcreteProcess::nativeSpawn unsafe 2005-09-07 0:18 [Bug libgcj/23758] New: java::lang::ConcreteProcess::nativeSpawn unsafe Hans dot Boehm at hp dot com @ 2005-09-07 0:50 ` pinskia at gcc dot gnu dot org 0 siblings, 0 replies; 6+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-09-07 0:50 UTC (permalink / raw) To: java-prs ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-07 00:49 ------- Confirmed based on: http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_04.html -- What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed| |1 GCC build triplet|*-*-linux-gnu | GCC host triplet|*-*-linux-gnu | GCC target triplet|*-*-linux-gnu and others |POSIX Last reconfirmed|0000-00-00 00:00:00 |2005-09-07 00:49:54 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23758 ^ permalink raw reply [flat|nested] 6+ messages in thread
[parent not found: <bug-23758-6957@http.gcc.gnu.org/bugzilla/>]
* [Bug libgcj/23758] java::lang::ConcreteProcess::nativeSpawn unsafe [not found] <bug-23758-6957@http.gcc.gnu.org/bugzilla/> @ 2005-11-08 21:20 ` daney at gcc dot gnu dot org 2007-04-06 16:53 ` daney at gcc dot gnu dot org ` (2 subsequent siblings) 3 siblings, 0 replies; 6+ messages in thread From: daney at gcc dot gnu dot org @ 2005-11-08 21:20 UTC (permalink / raw) To: java-prs ------- Comment #2 from daney at gcc dot gnu dot org 2005-11-08 21:20 ------- Could someone elaborate? If the child is killed, it is dead and it did not matter anyhow. The child is not going to be getting random async signals. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23758 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libgcj/23758] java::lang::ConcreteProcess::nativeSpawn unsafe [not found] <bug-23758-6957@http.gcc.gnu.org/bugzilla/> 2005-11-08 21:20 ` daney at gcc dot gnu dot org @ 2007-04-06 16:53 ` daney at gcc dot gnu dot org 2007-04-09 17:40 ` daney at gcc dot gnu dot org 2007-04-09 17:49 ` daney at gcc dot gnu dot org 3 siblings, 0 replies; 6+ messages in thread From: daney at gcc dot gnu dot org @ 2007-04-06 16:53 UTC (permalink / raw) To: java-prs -- daney at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|unassigned at gcc dot gnu |daney at gcc dot gnu dot org |dot org | Status|NEW |ASSIGNED Last reconfirmed|2005-09-07 00:49:54 |2007-04-06 17:53:52 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23758 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libgcj/23758] java::lang::ConcreteProcess::nativeSpawn unsafe [not found] <bug-23758-6957@http.gcc.gnu.org/bugzilla/> 2005-11-08 21:20 ` daney at gcc dot gnu dot org 2007-04-06 16:53 ` daney at gcc dot gnu dot org @ 2007-04-09 17:40 ` daney at gcc dot gnu dot org 2007-04-09 17:49 ` daney at gcc dot gnu dot org 3 siblings, 0 replies; 6+ messages in thread From: daney at gcc dot gnu dot org @ 2007-04-09 17:40 UTC (permalink / raw) To: java-prs ------- Comment #3 from daney at gcc dot gnu dot org 2007-04-09 18:40 ------- Subject: Bug 23758 Author: daney Date: Mon Apr 9 18:40:20 2007 New Revision: 123676 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=123676 Log: PR libgcj/23758 * java/lang/natPosixProcess.cc (nativeSpawn): Move building of environment before the fork. * testsuite/libjava.lang/Process_7.java: New test. * testsuite/libjava.lang/Process_7.out: Its expected results. * testsuite/libjava.lang/Process_7.jar: Generated file. Added: trunk/libjava/testsuite/libjava.lang/Process_7.jar (with props) trunk/libjava/testsuite/libjava.lang/Process_7.java trunk/libjava/testsuite/libjava.lang/Process_7.out Modified: trunk/libjava/ChangeLog trunk/libjava/java/lang/natPosixProcess.cc Propchange: trunk/libjava/testsuite/libjava.lang/Process_7.jar ('svn:mime-type' added) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23758 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libgcj/23758] java::lang::ConcreteProcess::nativeSpawn unsafe [not found] <bug-23758-6957@http.gcc.gnu.org/bugzilla/> ` (2 preceding siblings ...) 2007-04-09 17:40 ` daney at gcc dot gnu dot org @ 2007-04-09 17:49 ` daney at gcc dot gnu dot org 3 siblings, 0 replies; 6+ messages in thread From: daney at gcc dot gnu dot org @ 2007-04-09 17:49 UTC (permalink / raw) To: java-prs ------- Comment #4 from daney at gcc dot gnu dot org 2007-04-09 18:49 ------- Fixed on the trunk. -- daney at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED Target Milestone|--- |4.3.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23758 ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2007-04-09 17:49 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2005-09-07 0:18 [Bug libgcj/23758] New: java::lang::ConcreteProcess::nativeSpawn unsafe Hans dot Boehm at hp dot com 2005-09-07 0:50 ` [Bug libgcj/23758] " pinskia at gcc dot gnu dot org [not found] <bug-23758-6957@http.gcc.gnu.org/bugzilla/> 2005-11-08 21:20 ` daney at gcc dot gnu dot org 2007-04-06 16:53 ` daney at gcc dot gnu dot org 2007-04-09 17:40 ` daney at gcc dot gnu dot org 2007-04-09 17:49 ` daney at gcc dot gnu dot org
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