Coverage Report

Created: 2023-03-26 06:28

/src/httpd/srclib/apr/dso/unix/dso.c
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/* Licensed to the Apache Software Foundation (ASF) under one or more
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 * contributor license agreements.  See the NOTICE file distributed with
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 * this work for additional information regarding copyright ownership.
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 * The ASF licenses this file to You under the Apache License, Version 2.0
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 * (the "License"); you may not use this file except in compliance with
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 * the License.  You may obtain a copy of the License at
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 *
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 *     http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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#include "apr_arch_dso.h"
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#include "apr_strings.h"
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#include "apr_portable.h"
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#if APR_HAS_DSO
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#if !defined(DSO_USE_DLFCN) && !defined(DSO_USE_SHL) && !defined(DSO_USE_DYLD)
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#error No DSO implementation specified.
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#endif
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#ifdef HAVE_STDDEF_H
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#include <stddef.h>
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#endif
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#if APR_HAVE_STDLIB_H
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#include <stdlib.h> /* malloc(), free() */
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#endif
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#if APR_HAVE_STRING_H
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#include <string.h> /* for strerror() on HP-UX */
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#endif
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#if defined(DSO_USE_DYLD)
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#define DYLD_LIBRARY_HANDLE (void *)-1
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#endif
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APR_DECLARE(apr_status_t) apr_os_dso_handle_put(apr_dso_handle_t **aprdso,
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                                                apr_os_dso_handle_t osdso,
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                                                apr_pool_t *pool)
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0
{
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    *aprdso = apr_pcalloc(pool, sizeof **aprdso);
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    (*aprdso)->handle = osdso;
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    (*aprdso)->pool = pool;
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    return APR_SUCCESS;
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0
}
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APR_DECLARE(apr_status_t) apr_os_dso_handle_get(apr_os_dso_handle_t *osdso,
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                                                apr_dso_handle_t *aprdso)
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0
{
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    *osdso = aprdso->handle;
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    return APR_SUCCESS;
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0
}
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static apr_status_t dso_cleanup(void *thedso)
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0
{
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0
    apr_dso_handle_t *dso = thedso;
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    if (dso->handle == NULL)
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0
        return APR_SUCCESS;
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#if defined(DSO_USE_SHL)
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    shl_unload((shl_t)dso->handle);
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#elif defined(DSO_USE_DYLD)
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    if (dso->handle != DYLD_LIBRARY_HANDLE) {
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        NSUnLinkModule(dso->handle, FALSE);
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    }
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#elif defined(DSO_USE_DLFCN)
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0
    if (dlclose(dso->handle) != 0)
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        return APR_EINIT;
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0
#endif
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    dso->handle = NULL;
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    return APR_SUCCESS;
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0
}
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APR_DECLARE(apr_status_t) apr_dso_load(apr_dso_handle_t **res_handle,
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                                       const char *path, apr_pool_t *pool)
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0
{
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#if defined(DSO_USE_SHL)
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    shl_t os_handle = shl_load(path, BIND_IMMEDIATE, 0L);
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#elif defined(DSO_USE_DYLD)
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    NSObjectFileImage image;
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    NSModule os_handle = NULL;
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    NSObjectFileImageReturnCode dsoerr;
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    const char* err_msg = NULL;
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    dsoerr = NSCreateObjectFileImageFromFile(path, &image);
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    if (dsoerr == NSObjectFileImageSuccess) {
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#if defined(NSLINKMODULE_OPTION_RETURN_ON_ERROR) && defined(NSLINKMODULE_OPTION_NONE)
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        os_handle = NSLinkModule(image, path,
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                                 NSLINKMODULE_OPTION_RETURN_ON_ERROR |
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                                 NSLINKMODULE_OPTION_NONE);
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        /* If something went wrong, get the errors... */
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        if (!os_handle) {
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            NSLinkEditErrors errors;
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            int errorNumber;
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            const char *fileName;
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            NSLinkEditError(&errors, &errorNumber, &fileName, &err_msg);
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        }
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#else
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        os_handle = NSLinkModule(image, path, FALSE);
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#endif
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        NSDestroyObjectFileImage(image);
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    }
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    else if ((dsoerr == NSObjectFileImageFormat ||
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             dsoerr == NSObjectFileImageInappropriateFile) &&
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             NSAddLibrary(path) == TRUE) {
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        os_handle = (NSModule)DYLD_LIBRARY_HANDLE;
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    }
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    else {
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        err_msg = "cannot create object file image or add library";
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    }
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#elif defined(DSO_USE_DLFCN)
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#if defined(OSF1) || defined(SEQUENT) || defined(SNI) ||\
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    (defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)) ||\
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    defined(__DragonFly__)
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    void *os_handle = dlopen((char *)path, RTLD_NOW | RTLD_GLOBAL);
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#else
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0
    int flags = RTLD_NOW | RTLD_GLOBAL;
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0
    void *os_handle;
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#ifdef _AIX
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    if (strchr(path + 1, '(') && path[strlen(path) - 1] == ')')
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    {
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        /* This special archive.a(dso.so) syntax is required for
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         * the way libtool likes to build shared libraries on AIX.
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         * dlopen() support for such a library requires that the
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         * RTLD_MEMBER flag be enabled.
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         */
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        flags |= RTLD_MEMBER;
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    }
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#endif
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    os_handle = dlopen(path, flags);
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#endif
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#endif /* DSO_USE_x */
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    *res_handle = apr_pcalloc(pool, sizeof(**res_handle));
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    if(os_handle == NULL) {
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#if defined(DSO_USE_SHL)
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        (*res_handle)->errormsg = strerror(errno);
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        return APR_EDSOOPEN;
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#elif defined(DSO_USE_DYLD)
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        (*res_handle)->errormsg = (err_msg) ? err_msg : "link failed";
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        return APR_EDSOOPEN;
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#elif defined(DSO_USE_DLFCN)
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        (*res_handle)->errormsg = dlerror();
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        return APR_EDSOOPEN;
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0
#endif
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    }
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    (*res_handle)->handle = (void*)os_handle;
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    (*res_handle)->pool = pool;
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    (*res_handle)->errormsg = NULL;
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    apr_pool_cleanup_register(pool, *res_handle, dso_cleanup, apr_pool_cleanup_null);
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    return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_dso_unload(apr_dso_handle_t *handle)
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{
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    return apr_pool_cleanup_run(handle->pool, handle, dso_cleanup);
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}
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APR_DECLARE(apr_status_t) apr_dso_sym(apr_dso_handle_sym_t *ressym,
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                                      apr_dso_handle_t *handle,
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                                      const char *symname)
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0
{
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#if defined(DSO_USE_SHL)
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    void *symaddr = NULL;
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    int status;
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    errno = 0;
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    status = shl_findsym((void *)&handle->handle, symname, TYPE_PROCEDURE, &symaddr);
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    if (status == -1 && errno == 0) /* try TYPE_DATA instead */
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        status = shl_findsym((void *)&handle->handle, symname, TYPE_DATA, &symaddr);
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    if (status == -1)
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        return APR_ESYMNOTFOUND;
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    *ressym = symaddr;
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    return APR_SUCCESS;
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#elif defined(DSO_USE_DYLD)
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    void *retval = NULL;
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    NSSymbol symbol;
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    char *symname2 = (char*)malloc(sizeof(char)*(strlen(symname)+2));
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    sprintf(symname2, "_%s", symname);
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#ifdef NSLINKMODULE_OPTION_PRIVATE
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    if (handle->handle == DYLD_LIBRARY_HANDLE) {
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        symbol = NSLookupAndBindSymbol(symname2);
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    }
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    else {
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        symbol = NSLookupSymbolInModule((NSModule)handle->handle, symname2);
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    }
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#else
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    symbol = NSLookupAndBindSymbol(symname2);
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#endif
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    free(symname2);
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    if (symbol == NULL) {
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        handle->errormsg = "undefined symbol";
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  return APR_ESYMNOTFOUND;
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    }
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    retval = NSAddressOfSymbol(symbol);
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    if (retval == NULL) {
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        handle->errormsg = "cannot resolve symbol";
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  return APR_ESYMNOTFOUND;
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    }
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    *ressym = retval;
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    return APR_SUCCESS;
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#elif defined(DSO_USE_DLFCN)
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#if defined(DLSYM_NEEDS_UNDERSCORE)
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    void *retval;
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    char *symbol = (char*)malloc(sizeof(char)*(strlen(symname)+2));
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    sprintf(symbol, "_%s", symname);
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    retval = dlsym(handle->handle, symbol);
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    free(symbol);
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#elif defined(SEQUENT) || defined(SNI)
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    void *retval = dlsym(handle->handle, (char *)symname);
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#else
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0
    void *retval = dlsym(handle->handle, symname);
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0
#endif /* DLSYM_NEEDS_UNDERSCORE */
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    if (retval == NULL) {
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        handle->errormsg = dlerror();
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        return APR_ESYMNOTFOUND;
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    }
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    *ressym = retval;
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    return APR_SUCCESS;
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#endif /* DSO_USE_x */
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}
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APR_DECLARE(const char *) apr_dso_error(apr_dso_handle_t *dso, char *buffer,
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                                        apr_size_t buflen)
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{
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    if (dso->errormsg) {
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        apr_cpystrn(buffer, dso->errormsg, buflen);
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        return dso->errormsg;
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    }
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    return "No Error";
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}
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#endif