Generate core file on Solaris.

BitKeeper/etc/logging_ok

@@ -7,3 +7,4 @@ sasha@mysql.sashanet.com
 heikki@donna.mysql.fi
 miguel@light.local
 monty@donna.mysql.fi
+monty@bitch.mysql.fi

Docs/manual.texi

@@ -9880,12 +9880,6 @@ that you also probably need to raise the @code{core file size} by adding
 @code{ulimit -c 1000000} to @code{safe_mysqld} or starting @code{safe_mysqld}
 with @code{--core-file-sizes=1000000}. @xref{safe_mysqld, , @code{safe_mysqld}}.
 
-To get a core dump on Linux if @code{mysqld} dies with a SIGSEGV signal, you can 
-start @code{mysqld} with the @code{--core-file} option.  Note that you also probably
-need to raise the @code{core file size} by adding @code{ulimit -c 1000000} to
-@code{safe_mysqld} or starting @code{safe_mysqld} with 
-@code{--core-file-sizes=1000000}.  @xref{safe_mysqld, , @code{safe_mysqld}}.
-
 If you are linking your own MySQL client and get the error:
 
 @example
@@ -46844,6 +46838,8 @@ not yet 100% confident in this code.
 @appendixsubsec Changes in release 3.23.45
 @itemize @bullet
 @item
+@code{--core-file} now works on Solaris.
+@item
 Fixed bug with BDB tables and keys on @code{BLOB}'s.
 @item
 Fixed bug in @code{MERGE} tables on OS with 32 bit file pointers.

sql/mysqld.cc

@@ -1119,6 +1119,19 @@ static void start_signal_handler(void)
 }
 
 #elif defined(__EMX__)
+static void init_signals(void)
+{
+  signal(SIGQUIT, sig_kill);
+  signal(SIGKILL, sig_kill);
+  signal(SIGTERM, sig_kill);
+  signal(SIGINT,  sig_kill);
+  signal(SIGHUP,  sig_reload);	// Flush everything
+  signal(SIGALRM, SIG_IGN);
+  signal(SIGBREAK,SIG_IGN);
+  signal_thread = pthread_self();
+}
+
+
 static void sig_reload(int signo)
 {
   reload_acl_and_cache((THD*) 0,REFRESH_LOG, (TABLE_LIST*) 0); // Flush everything
@@ -1135,22 +1148,10 @@ static void sig_kill(int signo)
   signal(signo, SIG_ACK);
 }
 
-static void init_signals(void)
-{
-  signal(SIGQUIT, sig_kill);
-  signal(SIGKILL, sig_kill);
-  signal(SIGTERM, sig_kill);
-  signal(SIGINT,  sig_kill);
-  signal(SIGHUP,  sig_reload);	// Flush everything
-  signal(SIGALRM, SIG_IGN);
-  signal(SIGBREAK,SIG_IGN);
-  signal_thread = pthread_self();
-}
 
 static void start_signal_handler(void)
 {
 }
-
 #else /* if ! __WIN__ && ! __EMX__ */
 
 #ifdef HAVE_LINUXTHREADS
@@ -1160,10 +1161,12 @@ static void start_signal_handler(void)
 static sig_handler handle_segfault(int sig)
 {
   THD *thd=current_thd;
-  // strictly speaking, one needs a mutex here
-  // but since we have got SIGSEGV already, things are a mess
-  // so not having the mutex is not as bad as possibly using a buggy
-  // mutex - so we keep things simple
+  /*
+    Strictly speaking, we should need a mutex here
+    but since we have got SIGSEGV already, things are a mess
+    so not having the mutex is not as bad as possibly using a buggy
+    mutex - so we keep things simple.
+  */
   if (segfaulted)
   {
     fprintf(stderr, "Fatal signal %d while backtracing\n", sig);

sql/stacktrace.c

@@ -218,5 +218,7 @@ void write_core(int sig)
 {
   signal(sig, SIG_DFL);
   pthread_kill(pthread_self(), sig);
+  /* On Solaris, the above kill is not enough */
+  sigsend(P_PID,P_MYID,sig);
 }
 #endif