dri: Fix the logger error message handling.

Since the loader changes, there has been a compiler warning that the
prototype didn't match.  It turns out that if a loader error message was
ever thrown, you'd segfault because of trying to use the warning level as
a format string.

Reviewed-by: Keith Packard <[email protected]>
Tested-by: Keith Packard <[email protected]>
Reviewed-by: Kristian Høgsberg <[email protected]>

1 files changed, 25 insertions, 0 deletions

diff --git a/src/glx/dri_common.c b/src/glx/dri_common.c
index b5058c97c6e..93c45ea7bbd 100644
--- a/src/glx/dri_common.c
+++ b/src/glx/dri_common.c
@@ -40,6 +40,7 @@
 #include <stdarg.h>
 #include "glxclient.h"
 #include "dri_common.h"
+#include "loader.h"
 
 #ifndef RTLD_NOW
 #define RTLD_NOW 0
@@ -48,6 +49,30 @@
 #define RTLD_GLOBAL 0
 #endif
 
+_X_HIDDEN void
+dri_message(int level, const char *f, ...)
+{
+   va_list args;
+   int threshold = _LOADER_WARNING;
+   const char *libgl_debug;
+
+   libgl_debug = getenv("LIBGL_DEBUG");
+   if (libgl_debug) {
+      if (strstr(libgl_debug, "quiet"))
+         threshold = _LOADER_FATAL;
+      else if (strstr(libgl_debug, "verbose"))
+         threshold = _LOADER_DEBUG;
+   }
+
+   /* Note that the _LOADER_* levels are lower numbers for more severe. */
+   if (level <= threshold) {
+      fprintf(stderr, "libGL%s: ", level <= _LOADER_WARNING ? " error" : "");
+      va_start(args, f);
+      vfprintf(stderr, f, args);
+      va_end(args);
+   }
+}
+
 /**
  * Print informational message to stderr if LIBGL_DEBUG is set to
  * "verbose".