author | bpb |
Wed, 13 Mar 2019 07:16:57 -0700 | |
changeset 54100 | 1a6a5a0260a7 |
parent 47216 | 71c04702a3d5 |
child 58092 | b00b4706ec0f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1998, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* Machine Dependent implementation of the dynamic linking support |
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* for java. This routine is Unix specific. |
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*/ |
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#include <stdio.h> |
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#include <dlfcn.h> |
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#include <unistd.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include "path_md.h" |
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#ifdef __APPLE__ |
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#define LIB_SUFFIX "dylib" |
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#else |
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#define LIB_SUFFIX "so" |
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#endif |
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static void dll_build_name(char* buffer, size_t buflen, |
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const char* paths, const char* fname) { |
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char *path, *paths_copy, *next_token; |
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paths_copy = strdup(paths); |
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if (paths_copy == NULL) { |
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return; |
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} |
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next_token = NULL; |
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path = strtok_r(paths_copy, PATH_SEPARATOR, &next_token); |
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while (path != NULL) { |
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snprintf(buffer, buflen, "%s/lib%s." LIB_SUFFIX, path, fname); |
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if (access(buffer, F_OK) == 0) { |
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break; |
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} |
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*buffer = '\0'; |
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path = strtok_r(NULL, PATH_SEPARATOR, &next_token); |
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} |
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free(paths_copy); |
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} |
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/* |
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* create a string for the JNI native function name by adding the |
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* appropriate decorations. |
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*/ |
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int |
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dbgsysBuildFunName(char *name, int nameLen, int args_size, int encodingIndex) |
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{ |
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// On Unix, there is only one encoding method. |
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if (encodingIndex == 0) |
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return 1; |
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return 0; |
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} |
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/* |
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* create a string for the dynamic lib open call by adding the |
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* appropriate pre and extensions to a filename and the path |
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*/ |
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void |
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dbgsysBuildLibName(char *holder, int holderlen, const char *pname, |
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const char *fname) |
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{ |
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const int pnamelen = pname ? strlen(pname) : 0; |
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*holder = '\0'; |
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// Quietly truncate on buffer overflow. Should be an error. |
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if (pnamelen + (int)strlen(fname) + 10 > holderlen) { |
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return; |
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} |
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if (pnamelen == 0) { |
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(void)snprintf(holder, holderlen, "lib%s." LIB_SUFFIX, fname); |
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} else { |
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dll_build_name(holder, holderlen, pname, fname); |
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} |
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} |
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void * |
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dbgsysLoadLibrary(const char *name, char *err_buf, int err_buflen) |
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{ |
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void * result; |
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result = dlopen(name, RTLD_LAZY); |
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if (result == NULL) { |
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(void)strncpy(err_buf, dlerror(), err_buflen-2); |
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err_buf[err_buflen-1] = '\0'; |
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} |
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return result; |
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} |
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void dbgsysUnloadLibrary(void *handle) |
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{ |
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(void)dlclose(handle); |
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} |
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void * dbgsysFindLibraryEntry(void *handle, const char *name) |
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{ |
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return dlsym(handle, name); |
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} |