retrace.py

##########################################################################
#
# Copyright 2010 VMware, Inc.
# 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, sublicense, 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 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 NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS 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.
#
##########################################################################/


import stdapi
import glapi
from codegen import *


class ConstRemover(stdapi.Rebuilder):

    def visit_const(self, const):
        return const.type

    def visit_opaque(self, opaque):
        expr = opaque.expr
        if expr.startswith('const '):
            expr = expr[6:]
        return stdapi.Opaque(expr)


class ValueExtractor(stdapi.Visitor):

    def visit_literal(self, literal, lvalue, rvalue):
        if literal.format == 'Bool':
            print '    %s = static_cast<bool>(%s);' % (lvalue, rvalue)
        else:
            print '    %s = %s;' % (lvalue, rvalue)

    def visit_const(self, const, lvalue, rvalue):
        self.visit(const.type, lvalue, rvalue)

    def visit_alias(self, alias, lvalue, rvalue):
        self.visit(alias.type, lvalue, rvalue)
    
    def visit_enum(self, enum, lvalue, rvalue):
        print '    %s = %s;' % (lvalue, rvalue)

    def visit_bitmask(self, bitmask, lvalue, rvalue):
        self.visit(bitmask.type, lvalue, rvalue)

    def visit_array(self, array, lvalue, rvalue):
        print '    const Trace::Array *__a%s = dynamic_cast<const Trace::Array *>(&%s);' % (array.id, rvalue)
        print '    if (__a%s) {' % (array.id)
        length = '__a%s->values.size()' % array.id
        print '        %s = new %s[%s];' % (lvalue, array.type, length)
        index = '__j' + array.id
        print '        for(size_t {i} = 0; {i} < {length}; ++{i}) {{'.format(i = index, length = length)
        try:
            self.visit(array.type, '%s[%s]' % (lvalue, index), '*__a%s->values[%s]' % (array.id, index))
        finally:
            print '        }'
            print '    } else {'
            print '        %s = NULL;' % lvalue
            print '    }'
    
    def visit_pointer(self, pointer, lvalue, rvalue):
        print '    const Trace::Array *__a%s = dynamic_cast<const Trace::Array *>(&%s);' % (pointer.id, rvalue)
        print '    if (__a%s) {' % (pointer.id)
        print '        %s = new %s;' % (lvalue, pointer.type)
        try:
            self.visit(pointer.type, '%s[0]' % (lvalue,), '*__a%s->values[0]' % (pointer.id,))
        finally:
            print '    } else {'
            print '        %s = NULL;' % lvalue
            print '    }'

    def visit_handle(self, handle, lvalue, rvalue):
        self.visit(handle.type, lvalue, "__%s_map[%s]" %(handle.name, rvalue));
        print '    if (verbosity >= 2)'
        print '        std::cout << "%s " << static_cast<%s>(%s) << " <- " << %s << "\\n";' % (handle.name, handle.type, rvalue, lvalue)
    
    def visit_blob(self, blob, lvalue, rvalue):
        print '    %s = static_cast<%s>((%s).blob());' % (lvalue, blob, rvalue)
    
    def visit_string(self, string, lvalue, rvalue):
        print '    %s = (%s)((%s).string());' % (lvalue, string.expr, rvalue)



class ValueWrapper(stdapi.Visitor):

    def visit_literal(self, literal, lvalue, rvalue):
        pass

    def visit_alias(self, alias, lvalue, rvalue):
        self.visit(alias.type, lvalue, rvalue)
    
    def visit_enum(self, enum, lvalue, rvalue):
        pass

    def visit_bitmask(self, bitmask, lvalue, rvalue):
        pass

    def visit_array(self, array, lvalue, rvalue):
        print '    const Trace::Array *__a%s = dynamic_cast<const Trace::Array *>(&%s);' % (array.id, rvalue)
        print '    if (__a%s) {' % (array.id)
        length = '__a%s->values.size()' % array.id
        index = '__j' + array.id
        print '        for(size_t {i} = 0; {i} < {length}; ++{i}) {{'.format(i = index, length = length)
        try:
            self.visit(array.type, '%s[%s]' % (lvalue, index), '*__a%s->values[%s]' % (array.id, index))
        finally:
            print '        }'
            print '    }'
    
    def visit_pointer(self, pointer, lvalue, rvalue):
        print '    const Trace::Array *__a%s = dynamic_cast<const Trace::Array *>(&%s);' % (pointer.id, rvalue)
        print '    if (__a%s) {' % (pointer.id)
        try:
            self.visit(pointer.type, '%s[0]' % (lvalue,), '*__a%s->values[0]' % (pointer.id,))
        finally:
            print '    }'
    

    def visit_handle(self, handle, lvalue, rvalue):
        if handle.range is None:
            print "    __{handle.name}_map[static_cast<{handle.type}>({rvalue})] = {lvalue};".format(**locals())
            print '    if (verbosity >= 2)'
            print '        std::cout << "{handle.name} " << static_cast<{handle.type}>({rvalue}) << " -> " << {lvalue} << "\\n";'.format(**locals())
        else:
            i = '__h' + handle.id
            print '    for({handle.type} {i} = 0; {i} < {handle.range}; ++{i}) {{'.format(**locals())
            print '        __{handle.name}_map[static_cast<{handle.type}>({rvalue}) + {i}] = {lvalue} + {i};'.format(**locals())
            print '        if (verbosity >= 2)'
            print '            std::cout << "{handle.name} " << (static_cast<{handle.type}>({rvalue}) + {i}) << " -> " << ({lvalue} + {i}) << "\\n";'.format(**locals())
            print '    }'
    
    def visit_blob(self, blob, lvalue, rvalue):
        pass
    
    def visit_string(self, string, lvalue, rvalue):
        pass



class Retracer:

    def retrace_function(self, function):
        print 'static void retrace_%s(Trace::Call &call) {' % function.name
        success = True
        for arg in function.args:
            arg_type = ConstRemover().visit(arg.type)
            #print '    // %s ->  %s' % (arg.type, arg_type)
            print '    %s %s;' % (arg_type, arg.name)
            rvalue = 'call.arg(%u)' % (arg.index,)
            lvalue = arg.name
            try:
                self.extract_arg(function, arg, arg_type, lvalue, rvalue)
            except NotImplementedError:
                success = False
                print '    %s = 0; // FIXME' % arg.name
        if not success:
            self.fail_function(function)
        self.call_function(function)
        for arg in function.args:
            if arg.output:
                arg_type = ConstRemover().visit(arg.type)
                rvalue = 'call.arg(%u)' % (arg.index,)
                lvalue = arg.name
                try:
                    ValueWrapper().visit(arg_type, lvalue, rvalue)
                except NotImplementedError:
                    print '   // FIXME: %s' % arg.name
        if function.type is not stdapi.Void:
            rvalue = '*call.ret'
            lvalue = '__result'
            try:
                ValueWrapper().visit(function.type, lvalue, rvalue)
            except NotImplementedError:
                print '   // FIXME: result'
        print '}'
        print

    def fail_function(self, function):
        print '    std::cerr << "warning: unsupported call %s\\n";' % function.name
        print '    return;'

    def extract_arg(self, function, arg, arg_type, lvalue, rvalue):
        ValueExtractor().visit(arg_type, lvalue, rvalue)

    def call_function(self, function):
        arg_names = ", ".join([arg.name for arg in function.args])
        if function.type is not stdapi.Void:
            print '    %s __result;' % (function.type)
            print '    __result = %s(%s);' % (function.name, arg_names)
        else:
            print '    %s(%s);' % (function.name, arg_names)

    def filter_function(self, function):
        return True

    def retrace_functions(self, functions):
        functions = filter(self.filter_function, functions)

        for function in functions:
            if function.sideeffects:
                self.retrace_function(function)

        print 'static bool retrace_call(Trace::Call &call) {'
        print '    const char *name = call.name().c_str();'
        print
        print '    if (verbosity >=1 ) {'
        print '        std::cout << call;'
        print '        std::cout.flush();'
        print '    };'
        print

        func_dict = dict([(function.name, function) for function in functions])

        def handle_case(function_name):
            function = func_dict[function_name]
            if function.sideeffects:
                print '        retrace_%s(call);' % function.name
            print '        return true;'
    
        string_switch('name', func_dict.keys(), handle_case)

        print '    std::cerr << "warning: unknown call " << call.name() << "\\n";'
        print '    return false;'
        print '}'
        print


    def retrace_api(self, api):

        print '#include "trace_parser.hpp"'
        print

        types = api.all_types()
        handles = [type for type in types if isinstance(type, stdapi.Handle)]
        handle_names = set()
        for handle in handles:
            if handle.name not in handle_names:
                print 'static std::map<%s, %s> __%s_map;' % (handle.type, handle.type, handle.name)
                handle_names.add(handle.name)
        print

        print 'unsigned verbosity = 0;'
        print

        self.retrace_functions(api.functions)


if __name__ == '__main__':
    print
    print '#include <stdlib.h>'
    print '#include <string.h>'
    print
    print '#ifdef WIN32'
    print '#include <windows.h>'
    print '#endif'
    print
    print '#include <GL/glew.h>'
    print '#include <GL/glut.h>'
    print
    retrace_api(glapi.glapi)
    print '''

Trace::Parser parser;

static bool insideGlBeginEnd;

static void display(void) {
   Trace::Call *call;

   while ((call = parser.parse_call())) {
      if (call->name() == "glFlush" ||
          call->name() == "glXSwapBuffers" ||
          call->name() == "wglSwapBuffers") {
         glFlush();
         return;
      }
      
      retrace_call(*call);

      if (call->name() == "glBegin") {
         insideGlBeginEnd = true;
      }
      
      if (call->name() == "glEnd") {
         insideGlBeginEnd = false;
      }

      if (!insideGlBeginEnd) {
         GLenum error = glGetError();
         if (error != GL_NO_ERROR) {
            std::cerr << "warning: glGetError() = ";
            switch (error) {
            case GL_INVALID_ENUM:
               std::cerr << "GL_INVALID_ENUM";
               break;
            case GL_INVALID_VALUE:
               std::cerr << "GL_INVALID_VALUE";
               break;
            case GL_INVALID_OPERATION:
               std::cerr << "GL_INVALID_OPERATION";
               break;
            case GL_STACK_OVERFLOW:
               std::cerr << "GL_STACK_OVERFLOW";
               break;
            case GL_STACK_UNDERFLOW:
               std::cerr << "GL_STACK_UNDERFLOW";
               break;
            case GL_OUT_OF_MEMORY:
               std::cerr << "GL_OUT_OF_MEMORY";
               break;
            case GL_INVALID_FRAMEBUFFER_OPERATION:
               std::cerr << "GL_INVALID_FRAMEBUFFER_OPERATION";
               break;
            case GL_TABLE_TOO_LARGE:
               std::cerr << "GL_TABLE_TOO_LARGE";
               break;
            default:
               std::cerr << error;
               break;
            }
            std::cerr << "\\n";
         }
      }
   }

   glFlush();
   glutIdleFunc(NULL);
}

static void idle(void) {
   glutPostRedisplay();
}

int main(int argc, char **argv)
{
   glutInit(&argc, argv);
   glutInitWindowPosition(0, 0);
   glutInitWindowSize(800, 600);
   glutInitDisplayMode(GLUT_DEPTH | GLUT_RGB | GLUT_SINGLE);
   glutCreateWindow(argv[0]);
   glewInit();

   glutDisplayFunc(&display);
   glutIdleFunc(&idle);

    int i;
    for (i = 1; i < argc; ++i) {
      const char *arg = argv[i];

      if (arg[0] != '-') {
         break;
      }

      if (!strcmp(arg, "--")) {
         break;
      }
      else if (!strcmp(arg, "-v")) {
         ++verbosity;
      } else {
         std::cerr << "error: unknown option " << arg << "\\n";
         return 1;
      }
   }

   for ( ; i < argc; ++i) {
      if (parser.open(argv[i])) {
         glutMainLoop();
         parser.close();
      }
   }

   return 0;
}

'''