trace: New pipe driver to trace incoming calls.

Only pipe_screen calls traced, and only linux supported, for now.

12 files changed, 1300 insertions, 0 deletions

diff --git a/src/gallium/drivers/trace/README b/src/gallium/drivers/trace/README
new file mode 100644
index 00000000000..81da610bd5e
--- /dev/null
+++ b/src/gallium/drivers/trace/README
@@ -0,0 +1,37 @@
+This directory contains a Gallium3D pipe driver which traces all incoming calls.
+
+To build, invoke scons on the top dir as
+ 
+ scons statetrackers=mesa drivers=softpipe,i915simple,trace winsys=xlib
+
+To use do
+
+ ln -s libGL.so build/linux-x86-debug/gallium/winsys/xlib/libGL.so.1
+ export LD_LIBRARY_PATH=$PWD/build/linux-x86-debug/gallium/winsys/xlib
+ export GALLIUM_TRACE=y
+
+ensure the right libGL.so is being picked by doing
+
+ ldd `which glxingo` 
+
+and then try running
+
+ glxinfo
+
+which should create a gallium.*.trace file, which is an XML file. You can view 
+copying trace.xsl and trace.css to the same directory, and opening with a 
+XSLT capable browser like Firefox or Internet Explorer. It often happens that 
+the trace file was not properly terminated, and a
+
+ </trace>
+ 
+closing tag is missing from the file end. Add it before try to open or 
+further transform it by doing
+
+  echo '</trace>' >> gallium.??.trace
+
+
+This is still work in progress.  
+
+--
+Jose Fonseca <[email protected]>
diff --git a/src/gallium/drivers/trace/SConscript b/src/gallium/drivers/trace/SConscript
new file mode 100644
index 00000000000..30225b5a54c
--- /dev/null
+++ b/src/gallium/drivers/trace/SConscript
@@ -0,0 +1,15 @@
+Import('*')
+
+env = env.Clone()
+
+trace = env.ConvenienceLibrary(
+	target = 'trace',
+	source = [
+        'tr_context.c',
+        'tr_dump.c',
+		'tr_screen.c',
+        'tr_state.c',
+		'tr_stream.c',
+	])
+
+Export('trace')
\ No newline at end of file
diff --git a/src/gallium/drivers/trace/tr_context.c b/src/gallium/drivers/trace/tr_context.c
new file mode 100644
index 00000000000..67a67b3da62
--- /dev/null
+++ b/src/gallium/drivers/trace/tr_context.c
@@ -0,0 +1,41 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+#include "pipe/p_util.h"
+
+#include "tr_stream.h"
+#include "tr_dump.h"
+#include "tr_state.h"
+#include "tr_context.h"
+
+
+struct pipe_context *
+trace_context_create(struct pipe_context *pipe)
+{
+   /* TODO */
+   return pipe;
+}
diff --git a/src/gallium/drivers/trace/tr_context.h b/src/gallium/drivers/trace/tr_context.h
new file mode 100644
index 00000000000..75b8d11a7ac
--- /dev/null
+++ b/src/gallium/drivers/trace/tr_context.h
@@ -0,0 +1,58 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+#ifndef TR_CONTEXT_H_
+#define TR_CONTEXT_H_
+
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_debug.h"
+#include "pipe/p_context.h"
+
+
+struct trace_context
+{
+   struct pipe_context base;
+   
+   /* TODO */
+};
+
+
+static INLINE struct trace_context *
+trace_context(struct pipe_context *context)
+{
+   assert(context);
+   return (struct trace_context *)context;
+}
+
+
+
+struct pipe_context *
+trace_context_create(struct pipe_context *context);
+
+
+#endif /* TR_CONTEXT_H_ */
diff --git a/src/gallium/drivers/trace/tr_dump.c b/src/gallium/drivers/trace/tr_dump.c
new file mode 100644
index 00000000000..30c09863634
--- /dev/null
+++ b/src/gallium/drivers/trace/tr_dump.c
@@ -0,0 +1,329 @@
+/**************************************************************************
+ *
+ * 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
+ * Trace dumping functions.
+ * 
+ * For now we just use standard XML for dumping the trace calls, as this is
+ * simple to write, parse, and visually inspect, but the actual representation 
+ * is abstracted out of this file, so that we can switch to a binary 
+ * representation if/when it becomes justified.
+ * 
+ * @author Jose Fonseca <[email protected]>   
+ */
+
+
+#include "pipe/p_compiler.h"
+#include "util/u_string.h"
+
+#include "tr_stream.h"
+#include "tr_dump.h"
+
+
+static INLINE void 
+trace_dump_write(struct trace_stream *stream, const char *s)
+{
+   trace_stream_write(stream, s, strlen(s));
+}
+
+
+static INLINE void 
+trace_dump_writef(struct trace_stream *stream, const char *format, ...)
+{
+   char buf[1024];
+   va_list ap;
+   va_start(ap, format);
+   util_vsnprintf(buf, sizeof(buf), format, ap);
+   va_end(ap);
+   trace_dump_write(stream, buf);
+}
+
+
+static INLINE void 
+trace_dump_escape(struct trace_stream *stream, const char *str) 
+{
+   const unsigned char *p = (const unsigned char *)str;
+   unsigned char c;
+   while((c = *p++) != 0) {
+      if(c == '<')
+         trace_dump_write(stream, "&lt;");
+      else if(c == '>')
+         trace_dump_write(stream, "&gt;");
+      else if(c == '&')
+         trace_dump_write(stream, "&amp;");
+      else if(c == '\'')
+         trace_dump_write(stream, "&apos;");
+      else if(c == '\"')
+         trace_dump_write(stream, "&quot;");
+      else if(c >= 0x20 && c <= 0x7e)
+         trace_dump_writef(stream, "%c", c);
+      else
+         trace_dump_writef(stream, "&#%u;", c);
+   }
+}
+
+
+static INLINE void 
+trace_dump_indent(struct trace_stream *stream, unsigned level)
+{
+   unsigned i;
+   for(i = 0; i < level; ++i)
+      trace_dump_write(stream, "\t");
+}
+
+
+static INLINE void 
+trace_dump_newline(struct trace_stream *stream) 
+{
+   trace_dump_write(stream, "\n");
+}
+
+
+static INLINE void 
+trace_dump_tag(struct trace_stream *stream, 
+               const char *name)
+{
+   trace_dump_write(stream, "<");
+   trace_dump_write(stream, name);
+   trace_dump_write(stream, "/>");
+}
+
+
+static INLINE void 
+trace_dump_tag_begin(struct trace_stream *stream, 
+                     const char *name)
+{
+   trace_dump_write(stream, "<");
+   trace_dump_write(stream, name);
+   trace_dump_write(stream, ">");
+}
+
+static INLINE void 
+trace_dump_tag_begin1(struct trace_stream *stream, 
+                      const char *name, 
+                      const char *attr1, const char *value1)
+{
+   trace_dump_write(stream, "<");
+   trace_dump_write(stream, name);
+   trace_dump_write(stream, " ");
+   trace_dump_write(stream, attr1);
+   trace_dump_write(stream, "='");
+   trace_dump_escape(stream, value1);
+   trace_dump_write(stream, "'>");
+}
+
+
+static INLINE void 
+trace_dump_tag_begin2(struct trace_stream *stream, 
+                      const char *name, 
+                      const char *attr1, const char *value1,
+                      const char *attr2, const char *value2)
+{
+   trace_dump_write(stream, "<");
+   trace_dump_write(stream, name);
+   trace_dump_write(stream, " ");
+   trace_dump_write(stream, attr1);
+   trace_dump_write(stream, "=\'");
+   trace_dump_escape(stream, value1);
+   trace_dump_write(stream, "\' ");
+   trace_dump_write(stream, attr2);
+   trace_dump_write(stream, "=\'");
+   trace_dump_escape(stream, value2);
+   trace_dump_write(stream, "\'>");
+}
+
+
+static INLINE void 
+trace_dump_tag_begin3(struct trace_stream *stream, 
+                      const char *name, 
+                      const char *attr1, const char *value1,
+                      const char *attr2, const char *value2,
+                      const char *attr3, const char *value3)
+{
+   trace_dump_write(stream, "<");
+   trace_dump_write(stream, name);
+   trace_dump_write(stream, " ");
+   trace_dump_write(stream, attr1);
+   trace_dump_write(stream, "=\'");
+   trace_dump_escape(stream, value1);
+   trace_dump_write(stream, "\' ");
+   trace_dump_write(stream, attr2);
+   trace_dump_write(stream, "=\'");
+   trace_dump_escape(stream, value2);
+   trace_dump_write(stream, "\' ");
+   trace_dump_write(stream, attr3);
+   trace_dump_write(stream, "=\'");
+   trace_dump_escape(stream, value3);
+   trace_dump_write(stream, "\'>");
+}
+
+
+static INLINE void
+trace_dump_tag_end(struct trace_stream *stream, 
+                   const char *name)
+{
+   trace_dump_write(stream, "</");
+   trace_dump_write(stream, name);
+   trace_dump_write(stream, ">");
+}
+
+
+void  trace_dump_trace_begin(struct trace_stream *stream,
+                             unsigned version)
+{
+   trace_dump_write(stream, "<?xml version='1.0' encoding='UTF-8'?>\n");
+   trace_dump_write(stream, "<?xml-stylesheet type='text/xsl' href='trace.xsl'?>\n");
+   trace_dump_writef(stream, "<trace version='%u'>\n", version);
+}
+
+
+void trace_dump_trace_end(struct trace_stream *stream)
+{
+   trace_dump_write(stream, "</trace>\n");
+}
+
+void trace_dump_call_begin(struct trace_stream *stream,
+                           const char *klass, const char *method)
+{
+   trace_dump_indent(stream, 1);
+   trace_dump_tag_begin2(stream, "call", "class", klass, "method", method);
+   trace_dump_newline(stream);
+}
+
+void trace_dump_call_end(struct trace_stream *stream)
+{
+   trace_dump_indent(stream, 1);
+   trace_dump_tag_end(stream, "call");
+   trace_dump_newline(stream);
+}
+
+void trace_dump_arg_begin(struct trace_stream *stream,
+                          const char *name)
+{
+   trace_dump_indent(stream, 2);
+   trace_dump_tag_begin1(stream, "arg", "name", name);
+}
+
+void trace_dump_arg_end(struct trace_stream *stream)
+{
+   trace_dump_tag_end(stream, "arg");
+   trace_dump_newline(stream);
+}
+
+void trace_dump_ret_begin(struct trace_stream *stream)
+{
+   trace_dump_indent(stream, 2);
+   trace_dump_tag_begin(stream, "ret");
+}
+
+void trace_dump_ret_end(struct trace_stream *stream)
+{
+   trace_dump_tag_end(stream, "ret");
+   trace_dump_newline(stream);
+}
+
+void trace_dump_bool(struct trace_stream *stream, 
+                     int value)
+{
+   trace_dump_writef(stream, "<bool>%c</bool>", value ? '1' : '0');
+}
+
+void trace_dump_int(struct trace_stream *stream, 
+                    long int value)
+{
+   trace_dump_writef(stream, "<int>%li</int>", value);
+}
+
+void trace_dump_uint(struct trace_stream *stream, 
+                     long unsigned value)
+{
+   trace_dump_writef(stream, "<uint>%lu</uint>", value);
+}
+
+void trace_dump_float(struct trace_stream *stream, 
+                      double value)
+{
+   trace_dump_writef(stream, "<float>%g</float>", value);
+}
+
+void trace_dump_string(struct trace_stream *stream, 
+                       const char *str)
+{
+   trace_dump_write(stream, "<string>");
+   trace_dump_escape(stream, str);
+   trace_dump_write(stream, "</string>");
+}
+
+void trace_dump_array_begin(struct trace_stream *stream)
+{
+   trace_dump_write(stream, "<array>");
+}
+
+void trace_dump_array_end(struct trace_stream *stream)
+{
+   trace_dump_write(stream, "</array>");
+}
+
+void trace_dump_elem_begin(struct trace_stream *stream)
+{
+   trace_dump_write(stream, "<elem>");
+}
+
+void trace_dump_elem_end(struct trace_stream *stream)
+{
+   trace_dump_write(stream, "</elem>");
+}
+
+void trace_dump_struct_begin(struct trace_stream *stream, 
+                             const char *name)
+{
+   trace_dump_writef(stream, "<struct name='%s'>", name);
+}
+
+void trace_dump_struct_end(struct trace_stream *stream)
+{
+   trace_dump_write(stream, "</struct>");
+}
+
+void trace_dump_member_begin(struct trace_stream *stream, 
+                             const char *name)
+{
+   trace_dump_writef(stream, "<member name='%s'>", name);
+}
+
+void trace_dump_member_end(struct trace_stream *stream)
+{
+   trace_dump_write(stream, "</member>");
+}
+
+void trace_dump_ptr(struct trace_stream *stream, 
+                    const void *value)
+{
+   trace_dump_writef(stream, "<ptr>%p</ptr>", value);
+}
diff --git a/src/gallium/drivers/trace/tr_dump.h b/src/gallium/drivers/trace/tr_dump.h
new file mode 100644
index 00000000000..f0864865912
--- /dev/null
+++ b/src/gallium/drivers/trace/tr_dump.h
@@ -0,0 +1,102 @@
+/**************************************************************************
+ *
+ * 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 streams (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
+ * Trace data dumping primitives.
+ */
+
+#ifndef TR_DUMP_H
+#define TR_DUMP_H
+
+
+struct trace_stream;
+
+
+void trace_dump_trace_begin(struct trace_stream *stream, unsigned version);
+void trace_dump_trace_end(struct trace_stream *stream);
+void trace_dump_call_begin(struct trace_stream *stream, const char *klass, const char *method);
+void trace_dump_call_end(struct trace_stream *stream);
+void trace_dump_arg_begin(struct trace_stream *stream, const char *name);
+void trace_dump_arg_end(struct trace_stream *stream);
+void trace_dump_ret_begin(struct trace_stream *stream);
+void trace_dump_ret_end(struct trace_stream *stream);
+void trace_dump_bool(struct trace_stream *stream, int value);
+void trace_dump_int(struct trace_stream *stream, long int value);
+void trace_dump_uint(struct trace_stream *stream, long unsigned value);
+void trace_dump_float(struct trace_stream *stream, double value);
+void trace_dump_string(struct trace_stream *stream, const char *str);
+void trace_dump_array_begin(struct trace_stream *stream);
+void trace_dump_array_end(struct trace_stream *stream);
+void trace_dump_elem_begin(struct trace_stream *stream);
+void trace_dump_elem_end(struct trace_stream *stream);
+void trace_dump_struct_begin(struct trace_stream *stream, const char *name);
+void trace_dump_struct_end(struct trace_stream *stream);
+void trace_dump_member_begin(struct trace_stream *stream, const char *name);
+void trace_dump_member_end(struct trace_stream *stream);
+void trace_dump_ptr(struct trace_stream *stream, const void *value);
+
+
+/*
+ * Code saving macros. 
+ */
+
+#define trace_dump_arg(_stream, _type, _arg) \
+   do { \
+      trace_dump_arg_begin(_stream, #_arg); \
+      trace_dump_##_type(_stream, _arg); \
+      trace_dump_arg_end(_stream); \
+   } while(0)
+
+#define trace_dump_ret(_stream, _type, _arg) \
+   do { \
+      trace_dump_ret_begin(_stream); \
+      trace_dump_##_type(_stream, _arg); \
+      trace_dump_ret_end(_stream); \
+   } while(0)
+
+#define trace_dump_array(_stream, _type, _obj, _size) \
+   do { \
+      unsigned long idx; \
+      trace_dump_array_begin(_stream); \
+      for(idx = 0; idx < _size; ++idx) { \
+         trace_dump_elem_begin(_stream); \
+         trace_dump_##_type(_stream, _obj[idx]); \
+         trace_dump_elem_end(_stream); \
+      } \
+      trace_dump_array_end(_stream); \
+   } while(0)
+
+#define trace_dump_member(_stream, _type, _obj, _member) \
+   do { \
+      trace_dump_member_begin(_stream, #_member); \
+      trace_dump_##_type(_stream, _obj->_member); \
+      trace_dump_member_end(_stream); \
+   } while(0)
+
+
+#endif /* TR_DUMP_H */
diff --git a/src/gallium/drivers/trace/tr_screen.c b/src/gallium/drivers/trace/tr_screen.c
new file mode 100644
index 00000000000..20a2026e1d0
--- /dev/null
+++ b/src/gallium/drivers/trace/tr_screen.c
@@ -0,0 +1,385 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+#include "pipe/p_util.h"
+
+#include "tr_stream.h"
+#include "tr_dump.h"
+#include "tr_state.h"
+#include "tr_screen.h"
+
+
+static const char *
+trace_screen_get_name(struct pipe_screen *_screen)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   const char *result;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "get_name");
+   
+   trace_dump_arg(stream, ptr, screen);
+
+   result = screen->get_name(screen);
+   
+   trace_dump_ret(stream, string, result);
+   
+   trace_dump_call_end(stream);
+   
+   return result;
+}
+
+
+static const char *
+trace_screen_get_vendor(struct pipe_screen *_screen)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   const char *result;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "get_vendor");
+   
+   trace_dump_arg(stream, ptr, screen);
+  
+   result = screen->get_vendor(screen);
+   
+   trace_dump_ret(stream, string, result);
+   
+   trace_dump_call_end(stream);
+   
+   return result;
+}
+
+
+static int 
+trace_screen_get_param(struct pipe_screen *_screen, 
+                       int param)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   int result;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "get_param");
+   
+   trace_dump_arg(stream, ptr, screen);
+   trace_dump_arg(stream, int, param);
+
+   result = screen->get_param(screen, param);
+   
+   trace_dump_ret(stream, int, result);
+   
+   trace_dump_call_end(stream);
+   
+   return result;
+}
+
+
+static float 
+trace_screen_get_paramf(struct pipe_screen *_screen, 
+                        int param)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   float result;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "get_paramf");
+   
+   trace_dump_arg(stream, ptr, screen);
+   trace_dump_arg(stream, int, param);
+
+   result = screen->get_paramf(screen, param);
+   
+   trace_dump_ret(stream, float, result);
+   
+   trace_dump_call_end(stream);
+   
+   return result;
+}
+
+
+static boolean 
+trace_screen_is_format_supported(struct pipe_screen *_screen,
+                                 enum pipe_format format,
+                                 enum pipe_texture_target target,
+                                 unsigned tex_usage, 
+                                 unsigned geom_flags)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   boolean result;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "is_format_supported");
+   
+   trace_dump_arg(stream, ptr, screen);
+   trace_dump_arg(stream, int, format);
+   trace_dump_arg(stream, int, target);
+   trace_dump_arg(stream, uint, tex_usage);
+   trace_dump_arg(stream, uint, geom_flags);
+
+   result = screen->is_format_supported(screen, format, target, tex_usage, geom_flags);
+   
+   trace_dump_ret(stream, bool, result);
+   
+   trace_dump_call_end(stream);
+   
+   return result;
+}
+
+
+static struct pipe_texture *
+trace_screen_texture_create(struct pipe_screen *_screen,
+                            const struct pipe_texture *templat)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   struct pipe_texture *result;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "texture_create");
+
+   trace_dump_arg(stream, ptr, screen);
+   trace_dump_arg(stream, template, templat);
+
+   result = screen->texture_create(screen, templat);
+   
+   trace_dump_ret(stream, ptr, result);
+   
+   trace_dump_call_end(stream);
+   
+   return result;
+}
+
+
+static struct pipe_texture *
+trace_screen_texture_blanket(struct pipe_screen *_screen,
+                             const struct pipe_texture *templat,
+                             const unsigned *ppitch,
+                             struct pipe_buffer *buffer)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   unsigned pitch = *ppitch;
+   struct pipe_texture *result;
+
+   trace_dump_call_begin(stream, "pipe_screen", "texture_blanket");
+
+   trace_dump_arg(stream, ptr, screen);
+   trace_dump_arg(stream, template, templat);
+   trace_dump_arg(stream, uint, pitch);
+   trace_dump_arg(stream, ptr, buffer);
+
+   result = screen->texture_blanket(screen, templat, ppitch, buffer);
+   
+   trace_dump_ret(stream, ptr, result);
+   
+   trace_dump_call_end(stream);
+   
+   return result;
+}
+
+
+static void 
+trace_screen_texture_release(struct pipe_screen *_screen,
+                             struct pipe_texture **ptexture)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   struct pipe_texture *texture = *ptexture;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "texture_release");
+   
+   trace_dump_arg(stream, ptr, screen);
+   trace_dump_arg(stream, ptr, texture);
+
+   screen->texture_release(screen, ptexture);
+   
+   trace_dump_call_end(stream);
+}
+
+static struct pipe_surface *
+trace_screen_get_tex_surface(struct pipe_screen *_screen,
+                             struct pipe_texture *texture,
+                             unsigned face, unsigned level,
+                             unsigned zslice,
+                             unsigned usage)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   struct pipe_surface *result;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "get_tex_surface");
+   
+   trace_dump_arg(stream, ptr, screen);
+   trace_dump_arg(stream, ptr, texture);
+   trace_dump_arg(stream, uint, face);
+   trace_dump_arg(stream, uint, level);
+   trace_dump_arg(stream, uint, zslice);
+   trace_dump_arg(stream, uint, usage);
+
+   result = screen->get_tex_surface(screen, texture, face, level, zslice, usage);
+
+   trace_dump_ret(stream, ptr, result);
+   
+   trace_dump_call_end(stream);
+   
+   return result;
+}
+
+
+static void 
+trace_screen_tex_surface_release(struct pipe_screen *_screen,
+                                 struct pipe_surface **psurface)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   struct pipe_surface *surface = *psurface;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "tex_surface_release");
+   
+   trace_dump_arg(stream, ptr, screen);
+   trace_dump_arg(stream, ptr, surface);
+
+   screen->tex_surface_release(screen, psurface);
+   
+   trace_dump_call_end(stream);
+}
+
+
+static void *
+trace_screen_surface_map(struct pipe_screen *_screen,
+                         struct pipe_surface *surface,
+                         unsigned flags)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   struct pipe_surface *result;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "surface_map");
+   
+   trace_dump_arg(stream, ptr, screen);
+   trace_dump_arg(stream, ptr, surface);
+   trace_dump_arg(stream, uint, flags);
+
+   result = screen->surface_map(screen, surface, flags);
+   
+   trace_dump_ret(stream, ptr, result);
+   
+   trace_dump_call_end(stream);
+   
+   return result;
+}
+
+
+static void 
+trace_screen_surface_unmap(struct pipe_screen *_screen,
+                           struct pipe_surface *surface)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "surface_unmap");
+   
+   trace_dump_arg(stream, ptr, screen);
+   trace_dump_arg(stream, ptr, surface);
+
+   screen->surface_unmap(screen, surface);
+   
+   trace_dump_call_end(stream);
+}
+
+
+static void
+trace_screen_destroy(struct pipe_screen *_screen)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct trace_stream *stream = tr_scr->stream;
+   struct pipe_screen *screen = tr_scr->screen;
+   
+   trace_dump_call_begin(stream, "pipe_screen", "destroy");
+   
+   trace_dump_arg(stream, ptr, screen);
+
+   screen->destroy(screen);
+   
+   trace_dump_call_end(stream);
+   
+   trace_dump_trace_end(stream);
+   
+   trace_stream_close(tr_scr->stream);
+   
+   FREE(tr_scr);
+}
+
+
+struct pipe_screen *
+trace_screen_create(struct pipe_screen *screen)
+{
+   struct trace_screen *tr_scr;
+   
+   if(!debug_get_bool_option("GALLIUM_TRACE", FALSE))
+      return screen;
+   
+   tr_scr = CALLOC_STRUCT(trace_screen);
+   if(!tr_scr)
+      return NULL;
+
+   tr_scr->base.winsys = screen->winsys;
+   tr_scr->base.destroy = trace_screen_destroy;
+   tr_scr->base.get_name = trace_screen_get_name;
+   tr_scr->base.get_vendor = trace_screen_get_vendor;
+   tr_scr->base.get_param = trace_screen_get_param;
+   tr_scr->base.get_paramf = trace_screen_get_paramf;
+   tr_scr->base.is_format_supported = trace_screen_is_format_supported;
+   tr_scr->base.texture_create = trace_screen_texture_create;
+   tr_scr->base.texture_blanket = trace_screen_texture_blanket;
+   tr_scr->base.texture_release = trace_screen_texture_release;
+   tr_scr->base.get_tex_surface = trace_screen_get_tex_surface;
+   tr_scr->base.tex_surface_release = trace_screen_tex_surface_release;
+   tr_scr->base.surface_map = trace_screen_surface_map;
+   tr_scr->base.surface_unmap = trace_screen_surface_unmap;
+   
+   tr_scr->screen = screen;
+      
+   tr_scr->stream = trace_stream_create("gallium", "trace");
+   if(!tr_scr->stream)
+      return NULL;
+
+   trace_dump_trace_begin(tr_scr->stream, 0);
+   
+   return &tr_scr->base;
+}
diff --git a/src/gallium/drivers/trace/tr_screen.h b/src/gallium/drivers/trace/tr_screen.h
new file mode 100644
index 00000000000..5d7d667f719
--- /dev/null
+++ b/src/gallium/drivers/trace/tr_screen.h
@@ -0,0 +1,65 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+#ifndef TR_SCREEN_H_
+#define TR_SCREEN_H_
+
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_debug.h"
+#include "pipe/p_screen.h"
+
+
+struct trace_stream;
+
+
+struct trace_screen
+{
+   struct pipe_screen base;
+   
+   struct pipe_screen *screen;
+   
+   struct trace_stream *stream;
+   
+   unsigned event_no;
+};
+
+
+static INLINE struct trace_screen *
+trace_screen(struct pipe_screen *screen)
+{
+   assert(screen);
+   return (struct trace_screen *)screen;
+}
+
+
+
+struct pipe_screen *
+trace_screen_create(struct pipe_screen *screen);
+
+
+#endif /* TR_SCREEN_H_ */
diff --git a/src/gallium/drivers/trace/tr_state.c b/src/gallium/drivers/trace/tr_state.c
new file mode 100644
index 00000000000..1e0e87f7fd8
--- /dev/null
+++ b/src/gallium/drivers/trace/tr_state.c
@@ -0,0 +1,72 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_state.h"
+
+#include "tr_dump.h"
+#include "tr_state.h"
+
+
+void trace_dump_block(struct trace_stream *stream, 
+                      const struct pipe_format_block *block)
+{
+   trace_dump_struct_begin(stream, "pipe_format_block");
+   trace_dump_member(stream, uint, block, size);
+   trace_dump_member(stream, uint, block, width);
+   trace_dump_member(stream, uint, block, height);
+   trace_dump_struct_end(stream);
+}
+
+
+void trace_dump_template(struct trace_stream *stream, 
+                         const struct pipe_texture *templat)
+{
+   trace_dump_struct_begin(stream, "pipe_texture");
+   
+   trace_dump_member(stream, int, templat, target);
+   trace_dump_member(stream, int, templat, format);
+   
+   trace_dump_member_begin(stream, "width");
+   trace_dump_array(stream, uint, templat->width, 1);
+   trace_dump_member_end(stream);
+
+   trace_dump_member_begin(stream, "height");
+   trace_dump_array(stream, uint, templat->height, 1);
+   trace_dump_member_end(stream);
+
+   trace_dump_member_begin(stream, "block");
+   trace_dump_block(stream, &templat->block);
+   trace_dump_member_end(stream);
+   
+   trace_dump_member(stream, uint, templat, last_level);
+   trace_dump_member(stream, uint, templat, tex_usage);
+   
+   trace_dump_struct_end(stream);
+}
+
diff --git a/src/gallium/drivers/trace/tr_state.h b/src/gallium/drivers/trace/tr_state.h
new file mode 100644
index 00000000000..e52524ee90f
--- /dev/null
+++ b/src/gallium/drivers/trace/tr_state.h
@@ -0,0 +1,44 @@
+/**************************************************************************
+ *
+ * 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 streams (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.
+ *
+ **************************************************************************/
+
+#ifndef TR_STATE_H
+#define TR_STATE_H
+
+
+struct trace_stream;
+
+struct pipe_format_block;
+struct pipe_texture;
+
+void trace_dump_block(struct trace_stream *stream, 
+                      const struct pipe_format_block *block);
+
+void trace_dump_template(struct trace_stream *stream, 
+                         const struct pipe_texture *templat);
+
+
+#endif /* TR_STATE_H */
diff --git a/src/gallium/drivers/trace/tr_stream.c b/src/gallium/drivers/trace/tr_stream.c
new file mode 100644
index 00000000000..14cc257e154
--- /dev/null
+++ b/src/gallium/drivers/trace/tr_stream.c
@@ -0,0 +1,100 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+#include "pipe/p_config.h"
+
+#if defined(PIPE_OS_LINUX)
+#include <stdio.h>
+#else
+#error Unsupported platform 
+#endif
+
+#include "pipe/p_util.h"
+
+#include "tr_stream.h"
+
+
+struct trace_stream 
+{
+#if defined(PIPE_OS_LINUX)
+   FILE *file;
+#endif
+};
+
+
+struct trace_stream *
+trace_stream_create(const char *name, const char *ext)
+{
+   struct trace_stream *stream;
+   static unsigned file_no = 0; 
+   char filename[1024];
+   
+   stream = CALLOC_STRUCT(trace_stream);
+   if(!stream)
+      goto error1;
+   
+   snprintf(filename, sizeof(filename), "%s.%u.%s", name, file_no, ext);
+   
+#if defined(PIPE_OS_LINUX)
+   stream->file = fopen(filename, "w");
+   if(!stream->file)
+      goto error2;
+#endif
+   
+   return stream;
+   
+error2:
+   FREE(stream);
+error1:
+   return NULL;
+}
+
+
+boolean
+trace_stream_write(struct trace_stream *stream, const void *data, size_t size)
+{
+   if(!stream)
+      return FALSE;
+   
+#if defined(PIPE_OS_LINUX)
+   return fwrite(data, size, 1, stream->file) == size ? TRUE : FALSE;
+#endif
+}
+
+
+void
+trace_stream_close(struct trace_stream *stream) 
+{
+   if(!stream)
+      return;
+   
+#if defined(PIPE_OS_LINUX)
+   fclose(stream->file);
+#endif
+
+   FREE(stream);
+}
diff --git a/src/gallium/drivers/trace/tr_stream.h b/src/gallium/drivers/trace/tr_stream.h
new file mode 100644
index 00000000000..d50fed26917
--- /dev/null
+++ b/src/gallium/drivers/trace/tr_stream.h
@@ -0,0 +1,52 @@
+/**************************************************************************
+ *
+ * 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 streams (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
+ * Cross-platform sequential access stream abstraction.
+ */
+
+#ifndef TR_STREAM_H
+#define TR_STREAM_H
+
+
+#include "pipe/p_compiler.h"
+
+struct trace_stream;
+
+
+struct trace_stream *
+trace_stream_create(const char *name, const char *ext);
+
+boolean
+trace_stream_write(struct trace_stream *stream, const void *data, size_t size);
+
+void
+trace_stream_close(struct trace_stream *stream);
+
+
+#endif /* TR_STREAM_H */