src/lib/osunix.c 1.41

Index: src/lib/osunix.c
===================================================================
RCS file: /projects/compbio/cvsroot/kent/src/lib/osunix.c,v
retrieving revision 1.40
retrieving revision 1.41
diff -b -B -U 4 -r1.40 -r1.41
--- src/lib/osunix.c	3 Jun 2009 00:34:11 -0000	1.40
+++ src/lib/osunix.c	7 Jun 2009 07:11:55 -0000	1.41
@@ -390,8 +390,13 @@
  * prints a message, following by a new line, and then the stack track.  Just
  * prints errors to stderr rather than aborts. For debugging purposes
  * only.  */
 {
+static boolean inDumpStack = FALSE;  // don't allow re-entry if called from error handler
+if (inDumpStack)
+    return;
+inDumpStack = TRUE;
+
 vfprintf(stderr, format, args);
 fputc('\n', stderr);
 fflush(stderr);
 pid_t ppid = getpid();
@@ -404,25 +409,20 @@
 if (pid == 0)
     execPStack(ppid);
 int wstat;
 if (waitpid(pid, &wstat, 0) < 0)
-    {
     perror("waitpid on pstack failed");
-    return;
-    }
-if (WIFEXITED(wstat))
+else
     {
-    if (WEXITSTATUS(wstat) != 0)
+    if (WIFEXITED(wstat))
         {
+        if (WEXITSTATUS(wstat) != 0)
         fprintf(stderr, "pstack failed\n");
-        return;
-        }
     }
-else if (WIFSIGNALED(wstat))
-    {
+    else if (WIFSIGNALED(wstat))
     fprintf(stderr, "pstack signaled %d\n", WTERMSIG(wstat));
-    return;
     }
+inDumpStack = FALSE;
 }
 
 void dumpStack(char *format, ...)
 /* debugging function to run the pstack program on the current process. In