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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2013-04-15 23:57:27 +0200
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2013-04-15 23:57:27 +0200
commitbbce85a26c3749017acbef2983b1a2fade6510cc (patch)
tree15ab5d24f20bffac75042aa55efa688f3c976e1a
parent1f58a9a54678b4c86a4b4713378bfa8174bc648f (diff)
Record issue about missing cancellation point support
-rw-r--r--open_issues/libpthread_cancellation_points.mdwn41
1 files changed, 41 insertions, 0 deletions
diff --git a/open_issues/libpthread_cancellation_points.mdwn b/open_issues/libpthread_cancellation_points.mdwn
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+++ b/open_issues/libpthread_cancellation_points.mdwn
@@ -0,0 +1,41 @@
+[[!meta copyright="Copyright © 2013 Free Software Foundation, Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+[[!meta title="cancellation points are not cancelling threads"]]
+
+[[!tag open_issue_libpthread]]
+
+ #include <pthread.h>
+ #include <stdio.h>
+ #include <sys/select.h>
+ #include <unistd.h>
+
+ void *f (void*foo)
+ {
+ char buf[128];
+ //pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
+ while (1) {
+ read (0, buf, sizeof(buf));
+ }
+ }
+ int main (void) {
+ pthread_t t;
+ pthread_create (&t, NULL, f, NULL);
+ sleep (1);
+ pthread_cancel (t);
+ pthread_join (t, NULL);
+ exit(0);
+ }
+
+read() is not behaving as a cancellation point, only setting the cancel
+type to asynchronous permits this testcase to terminate. We do have the
+pthread_setcanceltype glibc/libpthread hook in the forward structure, but we are
+not using it: the LIBC_CANCEL_ASYNC macros are void, and we're not using them in
+the mig msg call either.