gallium: Memory debugging utilities.

There are no known tools for windows kernel memory debugging, so this is a
simple set of malloc etc wrappers.

Enabled by default on win32 debug builds

1 files changed, 172 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/p_debug_mem.c b/src/gallium/auxiliary/util/p_debug_mem.c
new file mode 100644
index 0000000000..56599dafa6
--- /dev/null
+++ b/src/gallium/auxiliary/util/p_debug_mem.c
@@ -0,0 +1,172 @@
+/**************************************************************************
+ * 
+ * Copyright 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
+ * Memory debugging.
+ * 
+ * @author José Fonseca <jrfonseca@tungstengraphics.com>
+ */
+
+#ifdef WIN32
+#include <windows.h>
+#include <winddi.h>
+#else
+#include <stdio.h>
+#include <stdlib.h>
+#endif
+
+#include "pipe/p_debug.h" 
+#include "util/u_double_list.h" 
+
+
+#define DEBUG_MEMORY_MAGIC 0x6e34090aU 
+
+
+#if defined(WIN32) && !defined(WINCE)
+#define real_malloc(_size) EngAllocMem(0, _size, 'D3AG')
+#define real_free(_ptr) EngFreeMem(_ptr)
+#else
+#define real_malloc(_size) malloc(_size)
+#define real_free(_ptr) free(_ptr)
+#endif
+
+
+struct debug_memory_header 
+{
+   struct list_head head;
+   
+   unsigned long no;
+   const char *file;
+   unsigned line;
+   const char *function;
+   size_t size;
+   unsigned magic;
+};
+
+static struct list_head list = { &list, &list };
+
+static unsigned long start_no = 0;
+static unsigned long end_no = 0;
+
+
+void *
+debug_malloc(const char *file, unsigned line, const char *function,
+             size_t size) 
+{
+   struct debug_memory_header *hdr;
+   
+   hdr = real_malloc(sizeof(*hdr) + size);
+   if(!hdr)
+      return NULL;
+ 
+   hdr->no = end_no++;
+   hdr->file = file;
+   hdr->line = line;
+   hdr->function = function;
+   hdr->size = size;
+   hdr->magic = DEBUG_MEMORY_MAGIC;
+
+   LIST_ADDTAIL(&hdr->head, &list);
+   
+   return (void *)((char *)hdr + sizeof(*hdr));
+}
+
+void
+debug_free(const char *file, unsigned line, const char *function,
+           void *ptr) 
+{
+   struct debug_memory_header *hdr;
+   
+   if(!ptr)
+      return;
+   
+   hdr = (struct debug_memory_header *)((char *)ptr - sizeof(*hdr));
+   if(hdr->magic != DEBUG_MEMORY_MAGIC) {
+      debug_printf("%s:%u:%s: freeing bad or corrupted memory %p\n",
+                   file, line, function,
+                   ptr);
+      debug_assert(0);
+      return;
+   }
+
+   LIST_DEL(&hdr->head);
+   hdr->magic = 0;
+   
+   real_free(hdr);
+}
+
+void *
+debug_calloc(const char *file, unsigned line, const char *function,
+             size_t count, size_t size )
+{
+   void *ptr = debug_malloc( file, line, function, count * size );
+   if( ptr )
+      memset( ptr, 0, count * size );
+   return ptr;
+}
+
+void *
+debug_realloc(const char *file, unsigned line, const char *function,
+              void *old_ptr, size_t old_size, size_t new_size )
+{
+   void *new_ptr = NULL;
+
+   if (new_size != 0) {
+      new_ptr = debug_malloc( file, line, function, new_size );
+      
+      if( new_ptr && old_ptr )
+         memcpy( new_ptr, old_ptr, old_size );
+   }
+
+   debug_free( file, line, function, old_ptr );
+   return new_ptr;
+}
+
+void
+debug_memory_reset(void)
+{
+   start_no = end_no;
+}
+
+void 
+debug_memory_report(void)
+{
+   struct list_head *entry;
+
+   entry = list.prev;
+   for (; entry != &list; entry = entry->prev) {
+      struct debug_memory_header *hdr;
+      void *ptr;
+      hdr = LIST_ENTRY(struct debug_memory_header, entry, head);
+      ptr = (void *)((char *)hdr + sizeof(*hdr));
+      if(hdr->no >= start_no)
+	 debug_printf("%s:%u:%s: %u byte st %p not freed\n",
+		      hdr->file, hdr->line, hdr->function,
+		      hdr->size, ptr);
+   }
+}