J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * Adapted from JDK 1.2 linker_md.c v1.37. Note that we #define |
| 28 | * NATIVE here, whether or not we're running solaris native threads. |
| 29 | * Outside the VM, it's unclear how we can do the locking that is |
| 30 | * done in the green threads version of the code below. |
| 31 | */ |
| 32 | #define NATIVE |
| 33 | |
| 34 | /* |
| 35 | * Machine Dependent implementation of the dynamic linking support |
| 36 | * for java. This routine is Solaris specific. |
| 37 | */ |
| 38 | |
| 39 | #include <stdio.h> |
| 40 | #include <dlfcn.h> |
| 41 | #include <unistd.h> |
| 42 | #include <stdlib.h> |
| 43 | #include <string.h> |
| 44 | |
| 45 | #include "path_md.h" |
| 46 | #ifndef NATIVE |
| 47 | #include "iomgr.h" |
| 48 | #include "threads_md.h" |
| 49 | #endif |
| 50 | |
| 51 | /* |
| 52 | * create a string for the JNI native function name by adding the |
| 53 | * appropriate decorations. |
| 54 | */ |
| 55 | int |
| 56 | dbgsysBuildFunName(char *name, int nameLen, int args_size, int encodingIndex) |
| 57 | { |
| 58 | /* On Solaris, there is only one encoding method. */ |
| 59 | if (encodingIndex == 0) |
| 60 | return 1; |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | /* |
| 65 | * create a string for the dynamic lib open call by adding the |
| 66 | * appropriate pre and extensions to a filename and the path |
| 67 | */ |
| 68 | void |
| 69 | dbgsysBuildLibName(char *holder, int holderlen, char *pname, char *fname) |
| 70 | { |
| 71 | const int pnamelen = pname ? strlen(pname) : 0; |
| 72 | |
| 73 | /* Quietly truncate on buffer overflow. Should be an error. */ |
| 74 | if (pnamelen + (int)strlen(fname) + 10 > holderlen) { |
| 75 | *holder = '\0'; |
| 76 | return; |
| 77 | } |
| 78 | |
| 79 | if (pnamelen == 0) { |
| 80 | (void)snprintf(holder, holderlen, "lib%s.so", fname); |
| 81 | } else { |
| 82 | (void)snprintf(holder, holderlen, "%s/lib%s.so", pname, fname); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | #ifndef NATIVE |
| 87 | extern int thr_main(void); |
| 88 | #endif |
| 89 | |
| 90 | void * |
| 91 | dbgsysLoadLibrary(const char *name, char *err_buf, int err_buflen) |
| 92 | { |
| 93 | void * result; |
| 94 | #ifdef NATIVE |
| 95 | result = dlopen(name, RTLD_LAZY); |
| 96 | #else |
| 97 | sysMonitorEnter(greenThreadSelf(), &_dl_lock); |
| 98 | result = dlopen(name, RTLD_NOW); |
| 99 | sysMonitorExit(greenThreadSelf(), &_dl_lock); |
| 100 | /* |
| 101 | * This is a bit of bulletproofing to catch the commonly occurring |
| 102 | * problem of people loading a library which depends on libthread into |
| 103 | * the VM. thr_main() should always return -1 which means that libthread |
| 104 | * isn't loaded. |
| 105 | */ |
| 106 | if (thr_main() != -1) { |
| 107 | VM_CALL(panic)("libthread loaded into green threads"); |
| 108 | } |
| 109 | #endif |
| 110 | if (result == NULL) { |
| 111 | (void)strncpy(err_buf, dlerror(), err_buflen-2); |
| 112 | err_buf[err_buflen-1] = '\0'; |
| 113 | } |
| 114 | return result; |
| 115 | } |
| 116 | |
| 117 | void dbgsysUnloadLibrary(void *handle) |
| 118 | { |
| 119 | #ifndef NATIVE |
| 120 | sysMonitorEnter(greenThreadSelf(), &_dl_lock); |
| 121 | #endif |
| 122 | (void)dlclose(handle); |
| 123 | #ifndef NATIVE |
| 124 | sysMonitorExit(greenThreadSelf(), &_dl_lock); |
| 125 | #endif |
| 126 | } |
| 127 | |
| 128 | void * dbgsysFindLibraryEntry(void *handle, const char *name) |
| 129 | { |
| 130 | void * sym; |
| 131 | #ifndef NATIVE |
| 132 | sysMonitorEnter(greenThreadSelf(), &_dl_lock); |
| 133 | #endif |
| 134 | sym = dlsym(handle, name); |
| 135 | #ifndef NATIVE |
| 136 | sysMonitorExit(greenThreadSelf(), &_dl_lock); |
| 137 | #endif |
| 138 | return sym; |
| 139 | } |