##########################################################################
#
+# Copyright 2011 Jose Fonseca
# Copyright 2008-2010 VMware, Inc.
# All Rights Reserved.
#
"""GLX tracing generator."""
-from stdapi import API
-from glapi import glapi
-from glxapi import glxapi
+from specs.stdapi import API
+from specs.glapi import glapi
+from specs.glxapi import glxapi
from gltrace import GlTracer
+from dispatch import function_pointer_type, function_pointer_value
class GlxTracer(GlTracer):
- def get_function_address(self, function):
- return '__%s' % (function.name,)
+ def is_public_function(self, function):
+ # The symbols visible in libGL.so can vary, so expose them all
+ return True
- def wrap_ret(self, function, instance):
- if function.name.startswith("glXGetProcAddress"):
- print ' if (%s) {' % instance
- for f in glxapi.functions:
- ptype = self.function_pointer_type(f)
- pvalue = self.function_pointer_value(f)
- print ' if(!strcmp("%s", (const char *)procName)) {' % f.name
- print ' %s = (%s)%s;' % (pvalue, ptype, instance)
- print ' %s = (%s)&%s;' % (instance, function.type, f.name);
- print ' }'
+ def trace_function_impl_body(self, function):
+ GlTracer.trace_function_impl_body(self, function)
+
+ # Take snapshots
+ if function.name == 'glXSwapBuffers':
+ print ' glsnapshot::snapshot(__call);'
+ if function.name in ('glFinish', 'glFlush'):
+ print ' GLint __draw_framebuffer = 0;'
+ print ' __glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &__draw_framebuffer);'
+ print ' if (__draw_framebuffer == 0) {'
+ print ' GLint __draw_buffer = GL_NONE;'
+ print ' __glGetIntegerv(GL_DRAW_BUFFER, &__draw_buffer);'
+ print ' if (__draw_buffer == GL_FRONT) {'
+ print ' glsnapshot::snapshot(__call);'
+ print ' }'
print ' }'
+ def wrap_ret(self, function, instance):
+ GlTracer.wrap_ret(self, function, instance)
+
+ if function.name in ("glXGetProcAddress", "glXGetProcAddressARB"):
+ print ' %s = __unwrap_proc_addr(procName, %s);' % (instance, instance)
+
if __name__ == '__main__':
print
print '#include <stdlib.h>'
print '#include <string.h>'
+ print
+ print '#ifndef _GNU_SOURCE'
+ print '#define _GNU_SOURCE // for dladdr'
+ print '#endif'
print '#include <dlfcn.h>'
print
- print '#include "trace_write.hpp"'
+ print '#include "trace_writer.hpp"'
+ print
+ print '// To validate our prototypes'
+ print '#define GL_GLEXT_PROTOTYPES'
+ print '#define GLX_GLXEXT_PROTOTYPES'
print
print '#include "glproc.hpp"'
print '#include "glsize.hpp"'
+ print '#include "glsnapshot.hpp"'
print
- print 'extern "C" {'
+ print 'static __GLXextFuncPtr __unwrap_proc_addr(const GLubyte * procName, __GLXextFuncPtr procPtr);'
print
+
api = API()
api.add_api(glxapi)
api.add_api(glapi)
tracer = GlxTracer()
tracer.trace_api(api)
+
+ print 'static __GLXextFuncPtr __unwrap_proc_addr(const GLubyte * procName, __GLXextFuncPtr procPtr) {'
+ print ' if (!procPtr) {'
+ print ' return procPtr;'
+ print ' }'
+ for f in api.functions:
+ ptype = function_pointer_type(f)
+ pvalue = function_pointer_value(f)
+ print ' if (strcmp("%s", (const char *)procName) == 0) {' % f.name
+ print ' %s = (%s)procPtr;' % (pvalue, ptype)
+ print ' return (__GLXextFuncPtr)&%s;' % (f.name,)
+ print ' }'
+ print ' OS::DebugMessage("apitrace: warning: unknown function \\"%s\\"\\n", (const char *)procName);'
+ print ' return procPtr;'
+ print '}'
print
- print '} /* extern "C" */'
+ print r'''
+
+
+/*
+ * Handle to the true libGL.so
+ */
+static void *libgl_handle = NULL;
+
+
+/*
+ * Invoke the true dlopen() function.
+ */
+static void *__dlopen(const char *filename, int flag)
+{
+ typedef void * (*PFNDLOPEN)(const char *, int);
+ static PFNDLOPEN dlopen_ptr = NULL;
+
+ if (!dlopen_ptr) {
+ dlopen_ptr = (PFNDLOPEN)dlsym(RTLD_NEXT, "dlopen");
+ if (!dlopen_ptr) {
+ OS::DebugMessage("apitrace: error: dlsym(RTLD_NEXT, \"dlopen\") failed\n");
+ return NULL;
+ }
+ }
+
+ return dlopen_ptr(filename, flag);
+}
+
+
+/*
+ * Several applications, such as Quake3, use dlopen("libGL.so.1"), but
+ * LD_PRELOAD does not intercept symbols obtained via dlopen/dlsym, therefore
+ * we need to intercept the dlopen() call here, and redirect to our wrapper
+ * shared object.
+ */
+extern "C" PUBLIC
+void * dlopen(const char *filename, int flag)
+{
+ void *handle;
+
+ handle = __dlopen(filename, flag);
+
+ const char * libgl_filename = getenv("TRACE_LIBGL");
+
+ if (filename && handle && !libgl_filename) {
+ if (0) {
+ OS::DebugMessage("apitrace: warning: dlopen(\"%s\", 0x%x)\n", filename, flag);
+ }
+
+ // FIXME: handle absolute paths and other versions
+ if (strcmp(filename, "libGL.so") == 0 ||
+ strcmp(filename, "libGL.so.1") == 0) {
+
+ // Use the true libGL.so handle instead of RTLD_NEXT from now on
+ libgl_handle = handle;
+
+ // Get the file path for our shared object, and use it instead
+ static int dummy = 0xdeedbeef;
+ Dl_info info;
+ if (dladdr(&dummy, &info)) {
+ OS::DebugMessage("apitrace: redirecting dlopen(\"%s\", 0x%x)\n", filename, flag);
+ handle = __dlopen(info.dli_fname, flag);
+ } else {
+ OS::DebugMessage("apitrace: warning: dladdr() failed\n");
+ }
+ }
+ }
+
+ return handle;
+}
+
+
+/*
+ * Lookup a libGL symbol
+ */
+void * __libgl_sym(const char *symbol)
+{
+ void *result;
+
+ if (!libgl_handle) {
+ /*
+ * The app doesn't directly link against libGL.so, nor does it directly
+ * dlopen it. So we have to load it ourselves.
+ */
+
+ const char * libgl_filename = getenv("TRACE_LIBGL");
+
+ if (!libgl_filename) {
+ /*
+ * Try to use whatever libGL.so the library is linked against.
+ */
+
+ result = dlsym(RTLD_NEXT, symbol);
+ if (result) {
+ libgl_handle = RTLD_NEXT;
+ return result;
+ }
+
+ libgl_filename = "libGL.so.1";
+ }
+
+ /*
+ * It would have been preferable to use RTLD_LOCAL to ensure that the
+ * application can never access libGL.so symbols directly, but this
+ * won't work, given libGL.so often loads a driver specific SO and
+ * exposes symbols to it.
+ */
+
+ libgl_handle = __dlopen(libgl_filename, RTLD_GLOBAL | RTLD_LAZY);
+ if (!libgl_handle) {
+ OS::DebugMessage("apitrace: error: couldn't find libGL.so\n");
+ return NULL;
+ }
+ }
+
+ return dlsym(libgl_handle, symbol);
+}
+
+
+'''
projects / apitrace / blobdiff