retrace/dllretrace.py

##########################################################################
#
# Copyright 2008-2010 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
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
##########################################################################/


from retrace import Retracer
from dispatch import Dispatcher
from specs.stdapi import API


class DllDispatcher(Dispatcher):

    def dispatchModule(self, module):
        tag = module.name.upper()
        print(r'const char *g_sz%sDllName = NULL;' % (tag,))
        print(r'HMODULE g_h%sModule = NULL;' % (tag,))
        print(r'')
        print(r'static PROC')
        print(r'_get%sProcAddress(LPCSTR lpProcName) {' % tag)
        print(r'    if (!g_h%sModule) {' % tag)
        print(r'        if (g_sz%sDllName) {' % tag)
        print(r'            g_h%sModule = LoadLibraryA(g_sz%sDllName);' % (tag, tag))
        print(r'            if (!g_h%sModule) {' % tag)
        print(r'                os::log("warning: failed to load %%s\n", g_sz%sDllName);' % tag) 
        print(r'            }')
        print(r'        }')
        print(r'        if (!g_h%sModule) {' % tag)
        print(r'            g_h%sModule = LoadLibraryA("%s.dll");' % (tag, module.name))
        print(r'        }')
        print(r'        if (!g_h%sModule) {' % tag)
        print(r'            os::log("error: failed to load %s.dll\n");' % module.name)
        print(r'            exit(1);')
        print(r'        }')
        print(r'    }')
        print(r'    return GetProcAddress(g_h%sModule, lpProcName);' % tag)
        print(r'}')
        print(r'')

        Dispatcher.dispatchModule(self, module)

    def getProcAddressName(self, module, function):
        return '_get%sProcAddress' % (module.name.upper())


class DllRetracer(Retracer):

    def retraceApi(self, api):
        for module in api.modules:
            dispatcher = DllDispatcher()
            dispatcher.dispatchModule(module)

        Retracer.retraceApi(self, api)