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-rw-r--r--src/gallium/auxiliary/pipebuffer/pb_bufmgr_debug.c317
1 files changed, 317 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 00000000000..4cb8c3bb557
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+++ b/src/gallium/auxiliary/pipebuffer/pb_bufmgr_debug.c
@@ -0,0 +1,317 @@
+/**************************************************************************
+ *
+ * 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 = MIN2(*max_ofs, i);
+ result = FALSE;
+ }
+ }
+ return result;
+}
+
+
+static void
+pb_debug_buffer_destroy(struct pb_buffer *_buf)
+{
+ struct pb_debug_buffer *buf = pb_debug_buffer(_buf);
+ uint8_t *map;
+
+ assert(!buf->base.base.refcount);
+
+ 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 (%u of %u bytes) detected\n",
+ buf->underflow_size - min_ofs,
+ buf->underflow_size);
+ }
+
+ 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 (%u of %u bytes) detected\n",
+ max_ofs,
+ buf->overflow_size);
+ }
+
+ debug_assert(!underflow && !overflow);
+
+ pb_unmap(buf->buffer);
+ }
+
+ 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_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);
+}
+
+
+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;
+ uint8_t *map;
+
+ 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;
+
+ 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 + size, buf->overflow_size);
+ pb_unmap(buf->buffer);
+ }
+
+ return &buf->base;
+}
+
+
+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->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 */
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