svn merge ^/branches/released .

1 files changed, 191 insertions, 0 deletions

diff --git a/mesalib/src/gallium/auxiliary/util/u_debug_refcnt.c b/mesalib/src/gallium/auxiliary/util/u_debug_refcnt.c
new file mode 100644
index 000000000..0a242e124
--- /dev/null
+++ b/mesalib/src/gallium/auxiliary/util/u_debug_refcnt.c
@@ -0,0 +1,191 @@
+/**************************************************************************

+ *

+ * Copyright 2010 Luca Barbieri

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining

+ * a copy of this software and associated documentation files (the

+ * "Software"), to deal in the Software without restriction, including

+ * without limitation the rights to use, copy, modify, merge, publish,

+ * distribute, sublicense, and/or sell copies of the Software, and to

+ * permit persons to whom the Software is furnished to do so, subject to

+ * the following conditions:

+ *

+ * The above copyright notice and this permission notice (including the

+ * next paragraph) shall be included in all copies or substantial

+ * portions of the Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE

+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+ *

+ **************************************************************************/

+

+#if defined(DEBUG) && (!defined(PIPE_OS_WINDOWS) || defined(PIPE_SUBSYSTEM_WINDOWS_USER))

+

+/* see http://www.mozilla.org/performance/refcnt-balancer.html for what do with the output

+ * on Linux, use tools/addr2line.sh to postprocess it before anything else

+ **/

+#include <util/u_debug.h>

+#include <util/u_debug_refcnt.h>

+#include <util/u_debug_stack.h>

+#include <util/u_debug_symbol.h>

+#include <util/u_string.h>

+#include <util/u_hash_table.h>

+#include <os/os_thread.h>

+#include <os/os_stream.h>

+

+int debug_refcnt_state;

+

+struct os_stream* stream;

+

+/* TODO: maybe move this serial machinery to a stand-alone module and expose it? */

+pipe_static_mutex(serials_mutex);

+

+static struct util_hash_table* serials_hash;

+static unsigned serials_last;

+

+static unsigned hash_ptr(void* p)

+{

+   return (unsigned)(uintptr_t)p;

+}

+

+static int compare_ptr(void* a, void* b)

+{

+   if(a == b)

+      return 0;

+   else if(a < b)

+      return -1;

+   else

+      return 1;

+}

+

+static boolean debug_serial(void* p, unsigned* pserial)

+{

+   unsigned serial;

+   boolean found = TRUE;

+#ifdef PIPE_SUBSYSTEM_WINDOWS_USER

+   static boolean first = TRUE;

+

+   if (first) {

+      pipe_mutex_init(serials_mutex);

+      first = FALSE;

+   }

+#endif

+

+   pipe_mutex_lock(serials_mutex);

+   if(!serials_hash)

+      serials_hash = util_hash_table_create(hash_ptr, compare_ptr);

+   serial = (unsigned)(uintptr_t)util_hash_table_get(serials_hash, p);

+   if(!serial)

+   {

+      /* time to stop logging... (you'll have a 100 GB logfile at least at this point)

+       * TODO: avoid this

+       */

+      serial = ++serials_last;

+      if(!serial)

+      {

+         debug_error("More than 2^32 objects detected, aborting.\n");

+         os_abort();

+      }

+

+      util_hash_table_set(serials_hash, p, (void*)(uintptr_t)serial);

+      found = FALSE;

+   }

+   pipe_mutex_unlock(serials_mutex);

+   *pserial = serial;

+   return found;

+}

+

+static void debug_serial_delete(void* p)

+{

+   pipe_mutex_lock(serials_mutex);

+   util_hash_table_remove(serials_hash, p);

+   pipe_mutex_unlock(serials_mutex);

+}

+

+#define STACK_LEN 64

+

+static void dump_stack(const char* symbols[STACK_LEN])

+{

+   unsigned i;

+   for(i = 0; i < STACK_LEN; ++i)

+   {

+      if(symbols[i])

+         os_stream_printf(stream, "%s\n", symbols[i]);

+   }

+   os_stream_write(stream, "\n", 1);

+}

+

+void debug_reference_slowpath(const struct pipe_reference* p, debug_reference_descriptor get_desc, int change)

+{

+   if(debug_refcnt_state < 0)

+      return;

+

+   if(!debug_refcnt_state)

+   {

+      const char* filename = debug_get_option("GALLIUM_REFCNT_LOG", NULL);

+      if(filename && filename[0])

+         stream = os_file_stream_create(filename);

+

+      if(stream)

+         debug_refcnt_state = 1;

+      else

+         debug_refcnt_state = -1;

+   }

+

+   if(debug_refcnt_state > 0)

+   {

+      struct debug_stack_frame frames[STACK_LEN];

+      const char* symbols[STACK_LEN];

+      char buf[1024];

+

+      unsigned i;

+      unsigned refcnt = p->count;

+      unsigned serial;

+      boolean existing = debug_serial((void*)p, &serial);

+

+      debug_backtrace_capture(frames, 1, STACK_LEN);

+      for(i = 0; i < STACK_LEN; ++i)

+      {

+         if(frames[i].function)

+            symbols[i] = debug_symbol_name_cached(frames[i].function);

+         else

+            symbols[i] = 0;

+      }

+

+      get_desc(buf, p);

+

+      if(!existing)

+      {

+         os_stream_printf(stream, "<%s> %p %u Create\n", buf, p, serial);

+         dump_stack(symbols);

+

+         /* this is there to provide a gradual change even if we don't see the initialization */

+         for(i = 1; i <= refcnt - change; ++i)

+         {

+            os_stream_printf(stream, "<%s> %p %u AddRef %u\n", buf, p, serial, i);

+            dump_stack(symbols);

+         }

+      }

+

+      if(change)

+      {

+         os_stream_printf(stream, "<%s> %p %u %s %u\n", buf, p, serial, change > 0 ? "AddRef" : "Release", refcnt);

+         dump_stack(symbols);

+      }

+

+      if(!refcnt)

+      {

+         debug_serial_delete((void*)p);

+         os_stream_printf(stream, "<%s> %p %u Destroy\n", buf, p, serial);

+         dump_stack(symbols);

+      }

+

+      os_stream_flush(stream);

+   }

+}

+#endif