[vlc-devel] [PATCH 3/4] Maemo: work-around segmentation fault when poll() unwinds

[Rémi Denis-Courmont]

---
 bin/vlc.c            |   11 +++++++++++
 include/vlc_fixups.h |    4 ++++
 src/misc/pthread.c   |    3 +++
 src/network/poll.c   |   34 +++++++++++++++++++++++++++++++++-
 4 files changed, 51 insertions(+), 1 deletions(-)

diff --git a/bin/vlc.c b/bin/vlc.c
index f944aae..51230c4 100644
--- a/bin/vlc.c
+++ b/bin/vlc.c
@@ -48,6 +48,13 @@ extern char *FromLocale (const char *);
 #include <pthread.h>
 #include <unistd.h>
 
+#ifdef HAVE_MAEMO
+static void dummy_handler (int signum)
+{
+    signal (signum, dummy_handler);
+}
+#endif
+
 /*****************************************************************************
  * main: parse command line, start interface and spawn threads.
  *****************************************************************************/
@@ -118,6 +125,10 @@ int main( int i_argc, const char *ppsz_argv[] )
     sigemptyset (&set);
     for (unsigned i = 0; i < sizeof (sigs) / sizeof (sigs[0]); i++)
         sigaddset (&set, sigs[i]);
+#ifdef HAVE_MAEMO
+    sigaddset (&set, SIGRTMIN);
+    signal (SIGRTMIN, dummy_handler);
+#endif
 
     /* Block all these signals */
     pthread_sigmask (SIG_BLOCK, &set, NULL);
diff --git a/include/vlc_fixups.h b/include/vlc_fixups.h
index ef6fae2..273c331 100644
--- a/include/vlc_fixups.h
+++ b/include/vlc_fixups.h
@@ -233,6 +233,10 @@ struct pollfd
 };
 
 # define poll(a, b, c) vlc_poll(a, b, c)
+#elif defined (HAVE_MAEMO)
+# include <poll.h>
+# define poll(a, b, c) vlc_poll(a, b, c)
+int vlc_poll (struct pollfd *, unsigned, int);
 #endif
 
 #ifndef HAVE_TDESTROY
diff --git a/src/misc/pthread.c b/src/misc/pthread.c
index 4522db0..10a91cb 100644
--- a/src/misc/pthread.c
+++ b/src/misc/pthread.c
@@ -640,6 +640,9 @@ int vlc_clone (vlc_thread_t *p_handle, void * (*entry) (void *), void *data,
 void vlc_cancel (vlc_thread_t thread_id)
 {
     pthread_cancel (thread_id);
+#ifdef HAVE_MAEMO
+    pthread_kill (thread_id, SIGRTMIN);
+#endif
 }
 
 /**
diff --git a/src/network/poll.c b/src/network/poll.c
index cf9554a..eb97c83 100644
--- a/src/network/poll.c
+++ b/src/network/poll.c
@@ -30,7 +30,39 @@
 #include <vlc_network.h>
 
 
-#ifdef HAVE_POLL
+#if HAVE_MAEMO
+# include <signal.h>
+# include <errno.h>
+# include <poll.h>
+
+int vlc_poll (struct pollfd *fds, unsigned nfds, int timeout)
+{
+    struct timespec tsbuf, *ts;
+    sigset_t set;
+    int canc, ret;
+
+    if (timeout != -1)
+    {
+        div_t d = div (timeout, 1000);
+        tsbuf.tv_sec = d.quot;
+        tsbuf.tv_nsec = d.rem * 1000000;
+        ts = &tsbuf;
+    }
+    else
+        ts = NULL;
+
+    pthread_sigmask (SIG_BLOCK, NULL, &set);
+    sigdelset (&set, SIGRTMIN);
+
+    canc = vlc_savecancel ();
+    ret = ppoll (fds, nfds, ts, &set);
+    vlc_restorecancel (canc);
+
+    vlc_testcancel ();
+    return ret;
+}
+
+#elif defined (HAVE_POLL)
 struct pollfd;
 
 int vlc_poll (struct pollfd *fds, unsigned nfds, int timeout)
-- 
1.6.6.1