Debug output uses local buffer to avoid clashes between threads.

void

debug(const char *msg, ...)

{

#define MAX_DEBUG_BUFSIZE       65536

#define MAX_DEBUG_BUFSIZE 16384

  va_list args;

  static uint bufsize = 4096;

  static char *buf = NULL;

  if (!buf)

    buf = mb_alloc(&root_pool, bufsize);

  char buf[MAX_DEBUG_BUFSIZE];

  va_start(args, msg);

  if (dbgf)

    {

      while (bvsnprintf(buf, bufsize, msg, args) < 0)

        if (bufsize >= MAX_DEBUG_BUFSIZE)

      if (bvsnprintf(buf, MAX_DEBUG_BUFSIZE, msg, args) < 0)

	bug("Extremely long debug output, split it.");

        else

          buf = mb_realloc(buf, (bufsize *= 2));

      fputs(buf, dbgf);

    }