1 files changed, 367 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/pipebuffer/pb_bufmgr_debug.c b/src/gallium/auxiliary/pipebuffer/pb_bufmgr_debug.c
new file mode 100644
index 0000000000..1675e6e182
--- /dev/null
+++ b/src/gallium/auxiliary/pipebuffer/pb_bufmgr_debug.c
@@ -0,0 +1,367 @@
+/**************************************************************************
+ *
+ * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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.
+ *
+ **************************************************************************/
+
+/**
+ * \file
+ * Debug buffer manager to detect buffer under- and overflows.
+ * 
+ * \author José Fonseca <jrfonseca@tungstengraphics.com>
+ */
+
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_debug.h"
+#include "pipe/p_winsys.h"
+#include "pipe/p_thread.h"
+#include "util/u_math.h"
+#include "util/u_memory.h"
+#include "util/u_double_list.h"
+#include "util/u_time.h"
+
+#include "pb_buffer.h"
+#include "pb_bufmgr.h"
+
+
+#ifdef DEBUG
+
+
+/**
+ * Convenience macro (type safe).
+ */
+#define SUPER(__derived) (&(__derived)->base)
+
+
+struct pb_debug_manager;
+
+
+/**
+ * Wrapper around a pipe buffer which adds delayed destruction.
+ */
+struct pb_debug_buffer
+{
+   struct pb_buffer base;
+   
+   struct pb_buffer *buffer;
+   struct pb_debug_manager *mgr;
+   
+   size_t underflow_size;
+   size_t overflow_size;
+};
+
+
+struct pb_debug_manager
+{
+   struct pb_manager base;
+
+   struct pb_manager *provider;
+
+   size_t band_size;
+};
+
+
+static INLINE struct pb_debug_buffer *
+pb_debug_buffer(struct pb_buffer *buf)
+{
+   assert(buf);
+   return (struct pb_debug_buffer *)buf;
+}
+
+
+static INLINE struct pb_debug_manager *
+pb_debug_manager(struct pb_manager *mgr)
+{
+   assert(mgr);
+   return (struct pb_debug_manager *)mgr;
+}
+
+
+static const uint8_t random_pattern[32] = {
+   0xaf, 0xcf, 0xa5, 0xa2, 0xc2, 0x63, 0x15, 0x1a, 
+   0x7e, 0xe2, 0x7e, 0x84, 0x15, 0x49, 0xa2, 0x1e,
+   0x49, 0x63, 0xf5, 0x52, 0x74, 0x66, 0x9e, 0xc4, 
+   0x6d, 0xcf, 0x2c, 0x4a, 0x74, 0xe6, 0xfd, 0x94
+};
+
+
+static INLINE void 
+fill_random_pattern(uint8_t *dst, size_t size)
+{
+   size_t i = 0;
+   while(size--) {
+      *dst++ = random_pattern[i++];
+      i &= sizeof(random_pattern) - 1;
+   }
+}
+
+
+static INLINE boolean 
+check_random_pattern(const uint8_t *dst, size_t size, 
+                     size_t *min_ofs, size_t *max_ofs) 
+{
+   boolean result = TRUE;
+   size_t i;
+   *min_ofs = size;
+   *max_ofs = 0;
+   for(i = 0; i < size; ++i) {
+      if(*dst++ != random_pattern[i % sizeof(random_pattern)]) {
+         *min_ofs = MIN2(*min_ofs, i);
+         *max_ofs = MAX2(*max_ofs, i);
+	 result = FALSE;
+      }
+   }
+   return result;
+}
+
+
+static void
+pb_debug_buffer_fill(struct pb_debug_buffer *buf)
+{
+   uint8_t *map;
+   
+   map = pb_map(buf->buffer, PIPE_BUFFER_USAGE_CPU_WRITE);
+   assert(map);
+   if(map) {
+      fill_random_pattern(map, buf->underflow_size);
+      fill_random_pattern(map + buf->underflow_size + buf->base.base.size, 
+                          buf->overflow_size);
+      pb_unmap(buf->buffer);
+   }
+}
+
+
+/**
+ * Check for under/over flows.
+ * 
+ * Should be called with the buffer unmaped.
+ */
+static void
+pb_debug_buffer_check(struct pb_debug_buffer *buf)
+{
+   uint8_t *map;
+   
+   map = pb_map(buf->buffer, PIPE_BUFFER_USAGE_CPU_READ);
+   assert(map);
+   if(map) {
+      boolean underflow, overflow;
+      size_t min_ofs, max_ofs;
+      
+      underflow = !check_random_pattern(map, buf->underflow_size, 
+                                        &min_ofs, &max_ofs);
+      if(underflow) {
+         debug_printf("buffer underflow (offset -%u%s to -%u bytes) detected\n",
+                      buf->underflow_size - min_ofs,
+                      min_ofs == 0 ? "+" : "",
+                      buf->underflow_size - max_ofs);
+      }
+      
+      overflow = !check_random_pattern(map + buf->underflow_size + buf->base.base.size, 
+                                       buf->overflow_size, 
+                                       &min_ofs, &max_ofs);
+      if(overflow) {
+         debug_printf("buffer overflow (size %u plus offset %u to %u%s bytes) detected\n",
+                      buf->base.base.size,
+                      min_ofs,
+                      max_ofs,
+                      max_ofs == buf->overflow_size - 1 ? "+" : "");
+      }
+      
+      debug_assert(!underflow && !overflow);
+
+      /* re-fill if not aborted */
+      if(underflow)
+         fill_random_pattern(map, buf->underflow_size);
+      if(overflow)
+         fill_random_pattern(map + buf->underflow_size + buf->base.base.size, 
+                             buf->overflow_size);
+
+      pb_unmap(buf->buffer);
+   }
+}
+
+
+static void
+pb_debug_buffer_destroy(struct pb_buffer *_buf)
+{
+   struct pb_debug_buffer *buf = pb_debug_buffer(_buf);  
+   
+   assert(!buf->base.base.refcount);
+   
+   pb_debug_buffer_check(buf);
+
+   pb_reference(&buf->buffer, NULL);
+   FREE(buf);
+}
+
+
+static void *
+pb_debug_buffer_map(struct pb_buffer *_buf, 
+                    unsigned flags)
+{
+   struct pb_debug_buffer *buf = pb_debug_buffer(_buf);
+   void *map;
+   
+   pb_debug_buffer_check(buf);
+
+   map = pb_map(buf->buffer, flags);
+   if(!map)
+      return NULL;
+   
+   return (uint8_t *)map + buf->underflow_size;
+}
+
+
+static void
+pb_debug_buffer_unmap(struct pb_buffer *_buf)
+{
+   struct pb_debug_buffer *buf = pb_debug_buffer(_buf);   
+   pb_unmap(buf->buffer);
+   
+   pb_debug_buffer_check(buf);
+}
+
+
+static void
+pb_debug_buffer_get_base_buffer(struct pb_buffer *_buf,
+                                struct pb_buffer **base_buf,
+                                unsigned *offset)
+{
+   struct pb_debug_buffer *buf = pb_debug_buffer(_buf);
+   pb_get_base_buffer(buf->buffer, base_buf, offset);
+   *offset += buf->underflow_size;
+}
+
+
+const struct pb_vtbl 
+pb_debug_buffer_vtbl = {
+      pb_debug_buffer_destroy,
+      pb_debug_buffer_map,
+      pb_debug_buffer_unmap,
+      pb_debug_buffer_get_base_buffer
+};
+
+
+static struct pb_buffer *
+pb_debug_manager_create_buffer(struct pb_manager *_mgr, 
+                               size_t size,
+                               const struct pb_desc *desc)
+{
+   struct pb_debug_manager *mgr = pb_debug_manager(_mgr);
+   struct pb_debug_buffer *buf;
+   struct pb_desc real_desc;
+   size_t real_size;
+   
+   buf = CALLOC_STRUCT(pb_debug_buffer);
+   if(!buf)
+      return NULL;
+   
+   real_size = size + 2*mgr->band_size;
+   real_desc = *desc;
+   real_desc.usage |= PIPE_BUFFER_USAGE_CPU_WRITE;
+   real_desc.usage |= PIPE_BUFFER_USAGE_CPU_READ;
+
+   buf->buffer = mgr->provider->create_buffer(mgr->provider, 
+                                              real_size, 
+                                              &real_desc);
+   if(!buf->buffer) {
+      FREE(buf);
+      return NULL;
+   }
+   
+   assert(buf->buffer->base.refcount >= 1);
+   assert(pb_check_alignment(real_desc.alignment, buf->buffer->base.alignment));
+   assert(pb_check_usage(real_desc.usage, buf->buffer->base.usage));
+   assert(buf->buffer->base.size >= real_size);
+   
+   buf->base.base.refcount = 1;
+   buf->base.base.alignment = desc->alignment;
+   buf->base.base.usage = desc->usage;
+   buf->base.base.size = size;
+   
+   buf->base.vtbl = &pb_debug_buffer_vtbl;
+   buf->mgr = mgr;
+
+   buf->underflow_size = mgr->band_size;
+   buf->overflow_size = buf->buffer->base.size - buf->underflow_size - size;
+   
+   pb_debug_buffer_fill(buf);
+   
+   return &buf->base;
+}
+
+
+static void
+pb_debug_manager_flush(struct pb_manager *_mgr)
+{
+   struct pb_debug_manager *mgr = pb_debug_manager(_mgr);
+   assert(mgr->provider->flush);
+   if(mgr->provider->flush)
+      mgr->provider->flush(mgr->provider);
+}
+
+
+static void
+pb_debug_manager_destroy(struct pb_manager *_mgr)
+{
+   struct pb_debug_manager *mgr = pb_debug_manager(_mgr);
+   mgr->provider->destroy(mgr->provider);
+   FREE(mgr);
+}
+
+
+struct pb_manager *
+pb_debug_manager_create(struct pb_manager *provider, size_t band_size) 
+{
+   struct pb_debug_manager *mgr;
+
+   if(!provider)
+      return NULL;
+   
+   mgr = CALLOC_STRUCT(pb_debug_manager);
+   if (!mgr)
+      return NULL;
+
+   mgr->base.destroy = pb_debug_manager_destroy;
+   mgr->base.create_buffer = pb_debug_manager_create_buffer;
+   mgr->base.flush = pb_debug_manager_flush;
+   mgr->provider = provider;
+   mgr->band_size = band_size;
+      
+   return &mgr->base;
+}
+
+
+#else /* !DEBUG */
+
+
+struct pb_manager *
+pb_debug_manager_create(struct pb_manager *provider, size_t band_size) 
+{
+   return provider;
+}
+
+
+#endif /* !DEBUG */