X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=glxtrace.py;h=6b5d786b6d91ff16f1562ceb9790f544481d51ed;hb=8216d8efc428dd336957433d743af5c4ac2d0d05;hp=bd86e5b35538ce95760d5afedc8093f05c5635d0;hpb=68ec4122ceae159709f74ace0eb862595ed68d8a;p=apitrace

diff --git a/glxtrace.py b/glxtrace.py
index bd86e5b..6b5d786 100644
--- a/glxtrace.py
+++ b/glxtrace.py
@@ -1,5 +1,6 @@
 ##########################################################################
 #
+# Copyright 2011 Jose Fonseca
 # Copyright 2008-2010 VMware, Inc.
 # All Rights Reserved.
 #
@@ -30,44 +31,201 @@
 from stdapi import API
 from glapi import glapi
 from glxapi import glxapi
-from trace import Tracer
+from gltrace import GlTracer
+from dispatch import function_pointer_type, function_pointer_value
 
 
-class GlxTracer(Tracer):
+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);
+}
+
+
+'''