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Diffstat (limited to 'ltdl.c')
| -rw-r--r-- | ltdl.c | 3427 |
1 files changed, 3427 insertions, 0 deletions
@@ -0,0 +1,3427 @@ +/* ltdl.c -- system independent dlopen wrapper + Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc. + Originally by Thomas Tanner <tanner@ffii.org> + This file is part of GNU Libtool. + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2 of the License, or (at your option) any later version. + +As a special exception to the GNU Lesser General Public License, +if you distribute this file as part of a program or library that +is built using GNU libtool, you may include it under the same +distribution terms that you use for the rest of that program. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA + +*/ + +#if HAVE_CONFIG_H +# include <config.h> +#endif + +#if HAVE_STDIO_H +# include <stdio.h> +#endif + +#if HAVE_STDLIB_H +# include <stdlib.h> +#endif + +#if HAVE_STRING_H +# include <string.h> +#else +# if HAVE_STRINGS_H +# include <strings.h> +# endif +#endif + +#if HAVE_CTYPE_H +# include <ctype.h> +#endif + +#if HAVE_MALLOC_H +# include <malloc.h> +#endif + +#if HAVE_MEMORY_H +# include <memory.h> +#endif + +#ifdef _AIX +#include <errno.h> +#include <strings.h> +#include <sys/ldr.h> +#endif /* _AIX */ + +#include "ltdl.h" + +/* Bah. We don't want inline. Needs autoconf check, which we don't want. */ +#ifdef inline +# undef inline +#endif +#define inline + + + +/* --- WINDOWS SUPPORT --- */ + + +#ifdef DLL_EXPORT +# define LT_GLOBAL_DATA __declspec(dllexport) +#else +# define LT_GLOBAL_DATA +#endif + +/* fopen() mode flags for reading a text file */ +#undef LT_READTEXT_MODE +#ifdef __WINDOWS__ +# define LT_READTEXT_MODE "rt" +#else +# define LT_READTEXT_MODE "r" +#endif + +#if defined(_WIN32) && !defined(__CYGWIN__) +# include "ltdl_win.h" +#endif + + + +/* --- MANIFEST CONSTANTS --- */ + + +/* max. filename length */ +#ifndef LT_FILENAME_MAX +# define LT_FILENAME_MAX 1024 +#endif + +/* This is the maximum symbol size that won't require malloc/free */ +#undef LT_SYMBOL_LENGTH +#define LT_SYMBOL_LENGTH 128 + +/* This accounts for the _LTX_ separator */ +#undef LT_SYMBOL_OVERHEAD +#define LT_SYMBOL_OVERHEAD 5 + + + + +/* --- TYPE DEFINITIONS -- */ + + +/* This type is used for the array of caller data sets in each handler. */ +typedef struct { + lt_dlcaller_id key; + lt_ptr data; +} lt_caller_data; + + + + +/* --- OPAQUE STRUCTURES DECLARED IN LTDL.H --- */ + + +/* Extract the diagnostic strings from the error table macro in the same + order as the enumberated indices in ltdl.h. */ + +static const char *lt_dlerror_strings[] = + { +#define LT_ERROR(name, diagnostic) (diagnostic), + lt_dlerror_table +#undef LT_ERROR + + 0 + }; + +/* This structure is used for the list of registered loaders. */ +struct lt_dlloader { + struct lt_dlloader *next; + const char *loader_name; /* identifying name for each loader */ + const char *sym_prefix; /* prefix for symbols */ + lt_module_open *module_open; + lt_module_close *module_close; + lt_find_sym *find_sym; + lt_dlloader_exit *dlloader_exit; + lt_user_data dlloader_data; +}; + +struct lt_dlhandle_struct { + struct lt_dlhandle_struct *next; + lt_dlloader *loader; /* dlopening interface */ + lt_dlinfo info; + int depcount; /* number of dependencies */ + lt_dlhandle *deplibs; /* dependencies */ + lt_module module; /* system module handle */ + lt_ptr system; /* system specific data */ + lt_caller_data *caller_data; /* per caller associated data */ + int flags; /* various boolean stats */ +}; + +/* Various boolean flags can be stored in the flags field of an + lt_dlhandle_struct... */ +#define LT_DLGET_FLAG(handle, flag) (((handle)->flags & (flag)) == (flag)) +#define LT_DLSET_FLAG(handle, flag) ((handle)->flags |= (flag)) + +#define LT_DLRESIDENT_FLAG (0x01 << 0) +#ifdef _AIX +#define LT_DLNOTFOUND_FLAG (0x01 << 1) /* may be linked statically */ +#define LT_DLMEMBER_FLAG RTLD_MEMBER +#endif /* _AIX */ +/* ...add more flags here... */ + +#define LT_DLIS_RESIDENT(handle) LT_DLGET_FLAG(handle, LT_DLRESIDENT_FLAG) + + +#define LT_DLSTRERROR(name) lt_dlerror_strings[LT_CONC(LT_ERROR_,name)] + +static const char objdir[] = LTDL_OBJDIR; +#ifdef LTDL_SHLIB_EXT +static const char shlib_ext[] = LTDL_SHLIB_EXT; +#endif +#ifdef LTDL_SYSSEARCHPATH +static const char sys_search_path[] = LTDL_SYSSEARCHPATH; +#endif + + + + +/* --- MUTEX LOCKING --- */ + + +/* Macros to make it easier to run the lock functions only if they have + been registered. The reason for the complicated lock macro is to + ensure that the stored error message from the last error is not + accidentally erased if the current function doesn't generate an + error of its own. */ +#define MUTEX_LOCK() LT_STMT_START { \ + if (mutex_lock) (*mutex_lock)(); } LT_STMT_END +#define MUTEX_UNLOCK() LT_STMT_START { \ + if (mutex_unlock) (*mutex_unlock)(); } LT_STMT_END +#define MUTEX_SETERROR(errormsg) LT_STMT_START { \ + if (mutex_seterror) (*mutex_seterror) (errormsg); \ + else last_error = (errormsg); } LT_STMT_END +#define MUTEX_GETERROR(errormsg) LT_STMT_START { \ + if (mutex_seterror) errormsg = (*mutex_geterror)(); \ + else (errormsg) = last_error; } LT_STMT_END + +/* The mutex functions stored here are global, and are necessarily the + same for all threads that wish to share access to libltdl. */ +static lt_dlmutex_lock *mutex_lock = 0; +static lt_dlmutex_unlock *mutex_unlock = 0; +static lt_dlmutex_seterror *mutex_seterror = 0; +static lt_dlmutex_geterror *mutex_geterror = 0; +static const char *last_error = 0; + + +/* Either set or reset the mutex functions. Either all the arguments must + be valid functions, or else all can be NULL to turn off locking entirely. + The registered functions should be manipulating a static global lock + from the lock() and unlock() callbacks, which needs to be reentrant. */ +int +lt_dlmutex_register (lock, unlock, seterror, geterror) + lt_dlmutex_lock *lock; + lt_dlmutex_unlock *unlock; + lt_dlmutex_seterror *seterror; + lt_dlmutex_geterror *geterror; +{ + lt_dlmutex_unlock *old_unlock = unlock; + int errors = 0; + + /* Lock using the old lock() callback, if any. */ + MUTEX_LOCK (); + + if ((lock && unlock && seterror && geterror) + || !(lock || unlock || seterror || geterror)) + { + mutex_lock = lock; + mutex_unlock = unlock; + mutex_geterror = geterror; + } + else + { + MUTEX_SETERROR (LT_DLSTRERROR (INVALID_MUTEX_ARGS)); + ++errors; + } + + /* Use the old unlock() callback we saved earlier, if any. Otherwise + record any errors using internal storage. */ + if (old_unlock) + (*old_unlock) (); + + /* Return the number of errors encountered during the execution of + this function. */ + return errors; +} + + + + +/* --- MEMORY HANDLING --- */ + + +LT_GLOBAL_DATA lt_ptr (*lt_dlmalloc) LT_PARAMS((size_t size)) + = (lt_ptr (*) LT_PARAMS((size_t))) malloc; +LT_GLOBAL_DATA void (*lt_dlfree) LT_PARAMS((lt_ptr ptr)) + = (void (*) LT_PARAMS((lt_ptr))) free; + +static lt_ptr rpl_realloc LT_PARAMS((lt_ptr ptr, + size_t size)); + +#define LT_DLMALLOC(tp, n) ((tp *) lt_dlmalloc ((n) * sizeof(tp))) +#define LT_DLREALLOC(tp, p, n) ((tp *) rpl_realloc ((p), (n) * sizeof(tp))) +#define LT_DLFREE(p) \ + LT_STMT_START { if (p) (p) = (lt_dlfree (p), (lt_ptr) 0); } LT_STMT_END + +#define LT_DLMEM_REASSIGN(p, q) LT_STMT_START { \ + if ((p) != (q)) { lt_dlfree (p); (p) = (q); } \ + } LT_STMT_END + + + +/* --- ERROR MESSAGES --- */ + + +static const char **user_error_strings = 0; +static int errorcount = LT_ERROR_MAX; + +int +lt_dladderror (diagnostic) + const char *diagnostic; +{ + int _index = 0; + int result = -1; + const char **temp = (const char **) 0; + + MUTEX_LOCK (); + + _index = errorcount - LT_ERROR_MAX; + temp = LT_DLREALLOC (const char *, user_error_strings, 1 + _index); + if (temp == 0) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + } + else + { + user_error_strings = temp; + user_error_strings[_index] = diagnostic; + result = errorcount++; + } + + MUTEX_UNLOCK (); + + return result; +} + +int +lt_dlseterror (_index) + int _index; +{ + int errors = 0; + + MUTEX_LOCK (); + + if (_index >= errorcount || _index < 0) + { + /* Ack! Error setting the error message! */ + MUTEX_SETERROR (LT_DLSTRERROR (INVALID_ERRORCODE)); + ++errors; + } + else if (_index < LT_ERROR_MAX) + { + /* No error setting the error message! */ + MUTEX_SETERROR (lt_dlerror_strings[errorcount]); + } + else + { + /* No error setting the error message! */ + MUTEX_SETERROR (user_error_strings[errorcount - LT_ERROR_MAX]); + } + + MUTEX_UNLOCK (); + + return errors; +} + + + + +/* --- REPLACEMENT FUNCTIONS --- */ + + +#undef strdup +#define strdup rpl_strdup + +static inline char * +strdup(str) + const char *str; +{ + char *tmp = 0; + + if (str) + { + tmp = LT_DLMALLOC (char, 1+ strlen (str)); + if (tmp) + { + strcpy(tmp, str); + } + } + + return tmp; +} + + +#if ! HAVE_STRCMP + +#undef strcmp +#define strcmp rpl_strcmp + +static inline int +strcmp (str1, str2) + const char *str1; + const char *str2; +{ + if (str1 == str2) + return 0; + if (str1 == 0) + return -1; + if (str2 == 0) + return 1; + + for (;*str1 && *str2; ++str1, ++str2) + { + if (*str1 != *str2) + break; + } + + return (int)(*str1 - *str2); +} +#endif + + +#if ! HAVE_STRCHR + +# if HAVE_INDEX +# define strchr index +# else +# define strchr rpl_strchr + +static inline const char* +strchr(str, ch) + const char *str; + int ch; +{ + const char *p; + + for (p = str; *p != (char)ch && *p != '\0'; ++p) + /*NOWORK*/; + + return (*p == (char)ch) ? p : 0; +} + +# endif +#endif /* !HAVE_STRCHR */ + +#if ! HAVE_STRRCHR + +# if HAVE_RINDEX +# define strrchr rindex +# else +# define strrchr rpl_strrchr + +static inline const char* +strrchr(str, ch) + const char *str; + int ch; +{ + const char *p, *q = 0; + + for (p = str; *p != '\0'; ++p) + { + if (*p == (char) ch) + { + q = p; + } + } + + return q; +} + +# endif +#endif + +/* NOTE: Neither bcopy nor the memcpy implementation below can + reliably handle copying in overlapping areas of memory, so + do not rely on this behavior when invoking memcpy later. */ +#if ! HAVE_MEMCPY + +# if HAVE_BCOPY +# define memcpy(dest, src, size) bcopy (src, dest, size) +# else +# define memcpy rpl_memcpy + +static inline char * +memcpy (dest, src, size) + char *dest; + const char *src; + size_t size; +{ + size_t i = 0; + + for (i = 0; i < size; ++i) + { + dest[i] = src[i]; + } + + return dest; +} + +# endif +#endif + +/* According to Alexandre Oliva <oliva@lsd.ic.unicamp.br>, + ``realloc is not entirely portable'' + In any case we want to use the allocator supplied by the user without + burdening them with an lt_dlrealloc function pointer to maintain. + Instead implement our own version (with known boundary conditions) + using lt_dlmalloc and lt_dlfree. */ +static lt_ptr +rpl_realloc (ptr, size) + lt_ptr ptr; + size_t size; +{ + if (size < 1) + { + /* For zero or less bytes, free the original memory */ + if (ptr != 0) + { + lt_dlfree (ptr); + } + + return (lt_ptr) 0; + } + else if (ptr == 0) + { + /* Allow reallocation of a NULL pointer. */ + return lt_dlmalloc (size); + } + else + { + /* Allocate a new block, copy and free the old block. */ + lt_ptr mem = (lt_ptr) realloc (ptr, size); + + /* Note that the contents of PTR are not damaged if there is + insufficient memory to realloc. */ + return mem; + } +} + + + + +/* --- DLOPEN() INTERFACE LOADER --- */ + +/* The Cygwin dlopen implementation prints a spurious error message to + stderr if its call to LoadLibrary() fails for any reason. We can + mitigate this by not using the Cygwin implementation, and falling + back to our own LoadLibrary() wrapper. */ +#if HAVE_LIBDL && !defined(__CYGWIN__) + +/* dynamic linking with dlopen/dlsym */ + +#if HAVE_DLFCN_H +# include <dlfcn.h> +#endif + +#ifdef RTLD_GLOBAL +# define LT_GLOBAL RTLD_GLOBAL +#else +# ifdef DL_GLOBAL +# define LT_GLOBAL DL_GLOBAL +# endif +#endif /* !RTLD_GLOBAL */ +#ifndef LT_GLOBAL +# define LT_GLOBAL 0 +#endif /* !LT_GLOBAL */ + +/* We may have to define LT_LAZY_OR_NOW in the command line if we + find out it does not work in some platform. */ +#ifndef LT_LAZY_OR_NOW +# ifdef RTLD_LAZY +# define LT_LAZY_OR_NOW RTLD_LAZY +# else +# ifdef DL_LAZY +# define LT_LAZY_OR_NOW DL_LAZY +# endif +# endif /* !RTLD_LAZY */ +#endif +#ifndef LT_LAZY_OR_NOW +# ifdef RTLD_NOW +# define LT_LAZY_OR_NOW RTLD_NOW +# else +# ifdef DL_NOW +# define LT_LAZY_OR_NOW DL_NOW +# endif +# endif /* !RTLD_NOW */ +#endif +#ifndef LT_LAZY_OR_NOW +# define LT_LAZY_OR_NOW 0 +#endif /* !LT_LAZY_OR_NOW */ + +#if HAVE_DLERROR +# define DLERROR(arg) dlerror () +#else +# define DLERROR(arg) LT_DLSTRERROR (arg) +#endif + +int lt_dlopen_flag = LT_LAZY_OR_NOW; + +#ifdef _AIX +/*------------------------------------------------------------------*/ +/* implementations found at the end */ +/*------------------------------------------------------------------*/ + +static void +sys_dl_init( ); + +static lt_dlhandle +sys_dl_search_by_name( const char* name ); + +static void +sys_dl_not_found_entry( const char* tmp ); +#endif /* _AIX */ + +static lt_module +sys_dl_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_module module; +#ifdef _AIX + /* If the basename is of the form "libname.a(member)", + set the appropriate flag. */ + if (strrchr(filename, '(')) + lt_dlopen_flag |= LT_DLMEMBER_FLAG; +#endif + module = dlopen (filename, lt_dlopen_flag); + + if (!module) + { + MUTEX_SETERROR (DLERROR (CANNOT_OPEN)); + } + + return module; +} + +static int +sys_dl_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (dlclose (module) != 0) + { + MUTEX_SETERROR (DLERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_dl_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = dlsym (module, symbol); + + if (!address) + { + MUTEX_SETERROR (DLERROR (SYMBOL_NOT_FOUND)); + } + + return address; +} + +static struct lt_user_dlloader sys_dl = + { +# ifdef NEED_USCORE + "_", +# else + 0, +# endif + sys_dl_open, sys_dl_close, sys_dl_sym, 0, 0 }; + +#else +int lt_dlopen_flag = 0; +#endif /* HAVE_LIBDL */ + + + +/* --- SHL_LOAD() INTERFACE LOADER --- */ + +#if HAVE_SHL_LOAD + +/* dynamic linking with shl_load (HP-UX) (comments from gmodule) */ + +#ifdef HAVE_DL_H +# include <dl.h> +#endif + +/* some flags are missing on some systems, so we provide + * harmless defaults. + * + * Mandatory: + * BIND_IMMEDIATE - Resolve symbol references when the library is loaded. + * BIND_DEFERRED - Delay code symbol resolution until actual reference. + * + * Optionally: + * BIND_FIRST - Place the library at the head of the symbol search + * order. + * BIND_NONFATAL - The default BIND_IMMEDIATE behavior is to treat all + * unsatisfied symbols as fatal. This flag allows + * binding of unsatisfied code symbols to be deferred + * until use. + * [Perl: For certain libraries, like DCE, deferred + * binding often causes run time problems. Adding + * BIND_NONFATAL to BIND_IMMEDIATE still allows + * unresolved references in situations like this.] + * BIND_NOSTART - Do not call the initializer for the shared library + * when the library is loaded, nor on a future call to + * shl_unload(). + * BIND_VERBOSE - Print verbose messages concerning possible + * unsatisfied symbols. + * + * hp9000s700/hp9000s800: + * BIND_RESTRICTED - Restrict symbols visible by the library to those + * present at library load time. + * DYNAMIC_PATH - Allow the loader to dynamically search for the + * library specified by the path argument. + */ + +#ifndef DYNAMIC_PATH +# define DYNAMIC_PATH 0 +#endif +#ifndef BIND_RESTRICTED +# define BIND_RESTRICTED 0 +#endif + +#define LT_BIND_FLAGS (BIND_IMMEDIATE | BIND_NONFATAL | DYNAMIC_PATH) + +static lt_module +sys_shl_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + /* A NULL handle is used to get symbols from self and everything + else already loaded that was exported with -E compiler flag. */ + lt_module module = (lt_module) 0; + + if (filename) + { + module = shl_load (filename, LT_BIND_FLAGS, 0L); + + if (!module) + { + MUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + } + } + + return module; +} + +static int +sys_shl_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (module && (shl_unload ((shl_t) (module)) != 0)) + { + MUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_shl_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + int is_module_self = (module == (lt_module) 0); + lt_ptr address = 0; + + /* shl_findsym considers zero valued MODULE as an indicator to search + for a symbol among all loaded (and exported) symbols including those + in the main executable. However, it sets MODULE to a valid module + address which breaks the semantics of libltdl's module management. */ + if (shl_findsym ((shl_t*) &module, symbol, TYPE_UNDEFINED, &address) == 0) + { + if (!address) + { + MUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + } + } + + if (is_module_self) + module = (lt_module) 0; + + return address; +} + +static struct lt_user_dlloader sys_shl = { + 0, sys_shl_open, sys_shl_close, sys_shl_sym, 0, 0 +}; + +#endif /* HAVE_SHL_LOAD */ + + + + +/* --- LOADLIBRARY() INTERFACE LOADER --- */ + +#if defined(__WINDOWS__) || defined(__CYGWIN__) + +/* dynamic linking for Win32 */ + +#include <windows.h> + +/* Forward declaration; required to implement handle search below. */ +static lt_dlhandle handles; + +static lt_module +sys_wll_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_dlhandle cur; + lt_module module = 0; + const char *errormsg = 0; + char *searchname = 0; + char *ext; + char self_name_buf[MAX_PATH]; + + if (!filename) + { + /* Get the name of main module */ + *self_name_buf = 0; + GetModuleFileName (NULL, (unsigned short*)self_name_buf, sizeof (self_name_buf)); + filename = ext = self_name_buf; + } + else + { + ext = (char *)strrchr (filename, '.'); + } + + if (ext) + { + /* FILENAME already has an extension. */ + searchname = strdup (filename); + } + else + { + /* Append a `.' to stop Windows from adding an + implicit `.dll' extension. */ + searchname = LT_DLMALLOC (char, 2+ strlen (filename)); + if (!searchname) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return 0; + } + strcpy (searchname, filename); + strcat (searchname, "."); + } + +#if __CYGWIN__ + { + char wpath[MAX_PATH]; + cygwin_conv_to_full_win32_path(searchname, wpath); + module = LoadLibrary(wpath); + } +#elif defined(_WIN32) + { + char wpath[MAX_PATH]; + strncpy(wpath, searchname, MAX_PATH); + win32_backslashify( wpath ); + win32_mapSo2Dll( wpath ); +//fprintf (stderr, "LoadLibraryA(\"%s\")\n", wpath); + module = LoadLibraryA( wpath ); + } +#else + module = LoadLibrary (searchname); +#endif + LT_DLFREE (searchname); + + /* libltdl expects this function to fail if it is unable + to physically load the library. Sadly, LoadLibrary + will search the loaded libraries for a match and return + one of them if the path search load fails. + + We check whether LoadLibrary is returning a handle to + an already loaded module, and simulate failure if we + find one. */ + MUTEX_LOCK (); + cur = handles; + while (cur) + { + if (!cur->module) + { + cur = 0; + break; + } + + if (cur->module == module) + { + break; + } + + cur = cur->next; + } + MUTEX_UNLOCK (); + + if (cur || !module) + { + MUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + module = 0; + } + + return module; +} + +static int +sys_wll_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (FreeLibrary(module) == 0) + { + MUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_wll_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = GetProcAddress (module, symbol); + + if (!address) + { + MUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + } + + return address; +} + +static struct lt_user_dlloader sys_wll = { + 0, sys_wll_open, sys_wll_close, sys_wll_sym, 0, 0 +}; + +#endif /* __WINDOWS__ */ + + + + +/* --- LOAD_ADD_ON() INTERFACE LOADER --- */ + + +#ifdef __BEOS__ + +/* dynamic linking for BeOS */ + +#include <kernel/image.h> + +static lt_module +sys_bedl_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + image_id image = 0; + + if (filename) + { + image = load_add_on (filename); + } + else + { + image_info info; + int32 cookie = 0; + if (get_next_image_info (0, &cookie, &info) == B_OK) + image = load_add_on (info.name); + } + + if (image <= 0) + { + MUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + image = 0; + } + + return (lt_module) image; +} + +static int +sys_bedl_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (unload_add_on ((image_id) module) != B_OK) + { + MUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_bedl_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = 0; + image_id image = (image_id) module; + + if (get_image_symbol (image, symbol, B_SYMBOL_TYPE_ANY, address) != B_OK) + { + MUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + address = 0; + } + + return address; +} + +static struct lt_user_dlloader sys_bedl = { + 0, sys_bedl_open, sys_bedl_close, sys_bedl_sym, 0, 0 +}; + +#endif /* __BEOS__ */ + + + + +/* --- DLD_LINK() INTERFACE LOADER --- */ + + +#if HAVE_DLD + +/* dynamic linking with dld */ + +#if HAVE_DLD_H +#include <dld.h> +#endif + +static lt_module +sys_dld_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_module module = strdup (filename); + + if (!module) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + module = 0; + } + else if (dld_link (filename) != 0) + { + MUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + LT_DLFREE (module); + module = 0; + } + + return module; +} + +static int +sys_dld_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (dld_unlink_by_file ((char*)(module), 1) != 0) + { + MUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + else + { + LT_DLFREE (module); + } + + return errors; +} + +static lt_ptr +sys_dld_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = dld_get_func (symbol); + + if (!address) + { + MUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + } + + return address; +} + +static struct lt_user_dlloader sys_dld = { + 0, sys_dld_open, sys_dld_close, sys_dld_sym, 0, 0 +}; + +#endif /* HAVE_DLD */ + + + + +/* --- DLPREOPEN() INTERFACE LOADER --- */ + + +/* emulate dynamic linking using preloaded_symbols */ + +typedef struct lt_dlsymlists_t +{ + struct lt_dlsymlists_t *next; + const lt_dlsymlist *syms; +} lt_dlsymlists_t; + +static const lt_dlsymlist *default_preloaded_symbols = 0; +static lt_dlsymlists_t *preloaded_symbols = 0; + +static int +presym_init (loader_data) + lt_user_data loader_data; +{ + int errors = 0; + + MUTEX_LOCK (); + + preloaded_symbols = 0; + if (default_preloaded_symbols) + { + errors = lt_dlpreload (default_preloaded_symbols); + } + + MUTEX_UNLOCK (); + + return errors; +} + +static int +presym_free_symlists () +{ + lt_dlsymlists_t *lists; + + MUTEX_LOCK (); + + lists = preloaded_symbols; + while (lists) + { + lt_dlsymlists_t *tmp = lists; + + lists = lists->next; + LT_DLFREE (tmp); + } + preloaded_symbols = 0; + + MUTEX_UNLOCK (); + + return 0; +} + +static int +presym_exit (loader_data) + lt_user_data loader_data; +{ + presym_free_symlists (); + return 0; +} + +static int +presym_add_symlist (preloaded) + const lt_dlsymlist *preloaded; +{ + lt_dlsymlists_t *tmp; + lt_dlsymlists_t *lists; + int errors = 0; + + MUTEX_LOCK (); + + lists = preloaded_symbols; + while (lists) + { + if (lists->syms == preloaded) + { + goto done; + } + lists = lists->next; + } + + tmp = LT_DLMALLOC (lt_dlsymlists_t, 1); + if (tmp) + { + tmp->syms = preloaded; + tmp->next = preloaded_symbols; + preloaded_symbols = tmp; + } + else + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + ++errors; + } + + done: + MUTEX_UNLOCK (); + return errors; +} + +static lt_module +presym_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_dlsymlists_t *lists; + lt_module module = (lt_module) 0; + + MUTEX_LOCK (); + lists = preloaded_symbols; + + if (!lists) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_SYMBOLS)); + goto done; + } + + if (!filename) + { + filename = "@PROGRAM@"; + } + + while (lists) + { + const lt_dlsymlist *syms = lists->syms; + + while (syms->name) + { + if (!syms->address && strcmp(syms->name, filename) == 0) + { + module = (lt_module) syms; + goto done; + } + ++syms; + } + + lists = lists->next; + } + + MUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + + done: + MUTEX_UNLOCK (); + return module; +} + +static int +presym_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + /* Just to silence gcc -Wall */ + module = 0; + return 0; +} + +static lt_ptr +presym_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_dlsymlist *syms = (lt_dlsymlist*) module; + + ++syms; + while (syms->address) + { + if (strcmp(syms->name, symbol) == 0) + { + return syms->address; + } + + ++syms; + } + + MUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + + return 0; +} + +static struct lt_user_dlloader presym = { + 0, presym_open, presym_close, presym_sym, presym_exit, 0 +}; + + + + + +/* --- DYNAMIC MODULE LOADING --- */ + + +static char *user_search_path= 0; +static lt_dlloader *loaders = 0; +static lt_dlhandle handles = 0; +static int initialized = 0; + +/* Initialize libltdl. */ +int +lt_dlinit () +{ + int errors = 0; + + MUTEX_LOCK (); + + /* Initialize only at first call. */ + if (++initialized == 1) + { + handles = 0; + user_search_path = 0; /* empty search path */ + +#if HAVE_LIBDL && !defined(__CYGWIN__) + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dl, "dlopen"); +#ifdef _AIX + sys_dl_init(); +#endif /* _AIX */ +#endif +#if HAVE_SHL_LOAD + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_shl, "dlopen"); +#endif +#if defined(__WINDOWS__) || defined(__CYGWIN__) + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_wll, "dlopen"); +#endif +#ifdef __BEOS__ + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_bedl, "dlopen"); +#endif +#if HAVE_DLD + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dld, "dld"); +#endif + errors += lt_dlloader_add (lt_dlloader_next (0), &presym, "dlpreload"); + + if (presym_init (presym.dlloader_data)) + { + MUTEX_SETERROR (LT_DLSTRERROR (INIT_LOADER)); + ++errors; + } + else if (errors != 0) + { + MUTEX_SETERROR (LT_DLSTRERROR (DLOPEN_NOT_SUPPORTED)); + ++errors; + } + } + + MUTEX_UNLOCK (); + + return errors; +} + +int +lt_dlpreload (preloaded) + const lt_dlsymlist *preloaded; +{ + int errors = 0; + + if (preloaded) + { + errors = presym_add_symlist (preloaded); + } + else + { + const char *errormsg = 0; + + presym_free_symlists(); + + MUTEX_LOCK (); + if (default_preloaded_symbols) + { + errors = lt_dlpreload (default_preloaded_symbols); + } + MUTEX_UNLOCK (); + } + + return errors; +} + +int +lt_dlpreload_default (preloaded) + const lt_dlsymlist *preloaded; +{ + MUTEX_LOCK (); + default_preloaded_symbols = preloaded; + MUTEX_UNLOCK (); + return 0; +} + +int +lt_dlexit () +{ + /* shut down libltdl */ + lt_dlloader *loader; + const char *errormsg; + int errors = 0; + + MUTEX_LOCK (); + loader = loaders; + + if (!initialized) + { + MUTEX_SETERROR (LT_DLSTRERROR (SHUTDOWN)); + ++errors; + goto done; + } + + /* shut down only at last call. */ + if (--initialized == 0) + { + int level; + + while (handles && LT_DLIS_RESIDENT (handles)) + { + handles = handles->next; + } + + /* close all modules */ + for (level = 1; handles; ++level) + { + lt_dlhandle cur = handles; + + while (cur) + { + lt_dlhandle tmp = cur; + cur = cur->next; + if (!LT_DLIS_RESIDENT (tmp) && tmp->info.ref_count <= level) + { + if (lt_dlclose (tmp)) + { + ++errors; + } + } + } + } + + /* close all loaders */ + while (loader) + { + lt_dlloader *next = loader->next; + lt_user_data data = loader->dlloader_data; + if (loader->dlloader_exit && loader->dlloader_exit (data)) + { + ++errors; + } + + LT_DLMEM_REASSIGN (loader, next); + } + loaders = 0; + } + + done: + MUTEX_UNLOCK (); + return errors; +} + +static int +tryall_dlopen (handle, filename) + lt_dlhandle *handle; + const char *filename; +{ + lt_dlhandle cur; + lt_dlloader *loader; + const char *saved_error; + int errors = 0; + + MUTEX_GETERROR (saved_error); + MUTEX_LOCK (); + + cur = handles; + loader = loaders; + + /* check whether the module was already opened */ + while (cur) + { + /* try to dlopen the program itself? */ + if (!cur->info.filename && !filename) + { + break; + } + + if (cur->info.filename && filename + && strcmp (cur->info.filename, filename) == 0) + { + break; + } + + cur = cur->next; + } + + if (cur) + { + ++cur->info.ref_count; + *handle = cur; + goto done; + } + + cur = *handle; + if (filename) + { + LT_DLFREE( cur->info.filename ); + cur->info.filename = strdup (filename); + if (!cur->info.filename) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + ++errors; + goto done; + } + } + else + { + LT_DLFREE( cur->info.filename ); + cur->info.filename = 0; + } + + while (loader) + { + lt_user_data data = loader->dlloader_data; + + cur->module = loader->module_open (data, filename); + + if (cur->module != 0) + { + break; + } + loader = loader->next; + } + + if (!loader) + { + LT_DLFREE (cur->info.filename); + ++errors; + goto done; + } + + cur->loader = loader; + last_error = saved_error; + + done: + MUTEX_UNLOCK (); + + return errors; +} + +static int +find_module (handle, dir, libdir, dlname, old_name, installed) + lt_dlhandle *handle; + const char *dir; + const char *libdir; + const char *dlname; + const char *old_name; + int installed; +{ + int error; + char *filename; + + /* try to open the old library first; if it was dlpreopened, + we want the preopened version of it, even if a dlopenable + module is available */ + if (old_name && tryall_dlopen(handle, old_name) == 0) + { + return 0; + } + + /* try to open the dynamic library */ + if (dlname) + { + size_t len; + + /* try to open the installed module */ + if (installed && libdir) + { + len = strlen (libdir) + 1 + strlen (dlname); + filename = LT_DLMALLOC (char, 1+ len); + + if (!filename) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return 1; + } + + sprintf (filename, "%s/%s", libdir, dlname); + error = (tryall_dlopen (handle, filename) != 0); + LT_DLFREE (filename); + + if (!error) + { + return 0; + } + } + + /* try to open the not-installed module */ + if (!installed) + { + len = (dir ? strlen (dir) : 0) + strlen (objdir) + strlen (dlname); + filename = LT_DLMALLOC (char, 1+ len); + + if (!filename) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return 1; + } + + if (dir) + { + strcpy (filename, dir); + } + else + { + *filename = 0; + } + strcat(filename, objdir); + strcat(filename, dlname); + + error = tryall_dlopen (handle, filename) != 0; + LT_DLFREE (filename); + if (!error) + { + return 0; + } + } + + /* maybe it was moved to another directory */ + { + len = (dir ? strlen (dir) : 0) + strlen (dlname); + filename = LT_DLMALLOC (char, 1+ len); + + if (dir) + { + strcpy (filename, dir); + } + else + { + *filename = 0; + } + strcat(filename, dlname); + + error = (tryall_dlopen (handle, filename) != 0); + LT_DLFREE (filename); + if (!error) + { + return 0; + } + } + } + + return 1; +} + +static char* +canonicalize_path (path) + const char *path; +{ + char *canonical = 0; + + if (path && *path) + { + char *ptr = strdup (path); + canonical = ptr; + +#ifdef LT_DIRSEP_CHAR + /* Avoid this overhead where '/' is the only separator. */ + while (ptr = (char*)strchr (ptr, LT_DIRSEP_CHAR)) + { + *ptr++ = '/'; + } +#endif + } + + return canonical; +} + +static lt_ptr +find_file (basename, search_path, pdir, handle) + const char *basename; + const char *search_path; + char **pdir; + lt_dlhandle *handle; +{ + /* When handle != NULL search a library, otherwise a file + return NULL on failure, otherwise the file/handle. */ + + lt_ptr result = 0; + char *filename = 0; + int filenamesize= 0; + int lenbase = strlen (basename); + char *canonical = 0; + char *next = 0; + + MUTEX_LOCK (); + + if (!search_path || !*search_path) + { + MUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + goto cleanup; + } + + canonical = canonicalize_path (search_path); + if (!canonical) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + goto cleanup; + } + + next = canonical; + while (next) + { + int lendir; + char *cur = next; + + next = (char*)strchr (cur, LT_PATHSEP_CHAR); + if (!next) + { + next = cur + strlen (cur); + } + + lendir = next - cur; + if (*next == LT_PATHSEP_CHAR) + { + ++next; + } + else + { + next = 0; + } + + if (lendir == 0) + { + continue; + } + + if (lendir + 1 + lenbase >= filenamesize) + { + LT_DLFREE (filename); + filenamesize = lendir + 1 + lenbase + 1; + filename = LT_DLMALLOC (char, filenamesize); + + if (!filename) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + goto cleanup; + } + } + + strncpy(filename, cur, lendir); + if (filename[lendir-1] != '/') + { + filename[lendir++] = '/'; + } + strcpy(filename+lendir, basename); + if (handle) + { + if (tryall_dlopen (handle, filename) == 0) + { + result = (lt_ptr) handle; + goto cleanup; + } + } + else + { + FILE *file = fopen (filename, LT_READTEXT_MODE); + if (file) + { + LT_DLFREE (*pdir); + + filename[lendir] = '\0'; + *pdir = strdup(filename); + if (!*pdir) + { + /* We could have even avoided the strdup, + but there would be some memory overhead. */ + *pdir = filename; + filename = 0; + } + + result = (lt_ptr) file; + goto cleanup; + } + } + } + + MUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + + cleanup: + LT_DLFREE (filename); + LT_DLFREE (canonical); + + MUTEX_UNLOCK (); + + return result; +} + +static int +load_deplibs(handle, deplibs) + lt_dlhandle handle; + char *deplibs; +{ +#if LTDL_DLOPEN_DEPLIBS + char *p, *save_search_path; + int depcount = 0; + int i; + char **names = 0; +#endif + int errors = 0; + + handle->depcount = 0; + +#if LTDL_DLOPEN_DEPLIBS + if (!deplibs) + { + return errors; + } + ++errors; + + MUTEX_LOCK (); + save_search_path = strdup (user_search_path); + if (user_search_path && !save_search_path) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + goto cleanup; + } + + /* extract search paths and count deplibs */ + p = deplibs; + while (*p) + { + if (!isspace ((int) *p)) + { + char *end = p+1; + while (*end && !isspace((int) *end)) + { + ++end; + } + + if (strncmp(p, "-L", 2) == 0 || strncmp(p, "-R", 2) == 0) + { + char save = *end; + *end = 0; /* set a temporary string terminator */ + if (lt_dladdsearchdir(p+2)) + { + goto cleanup; + } + *end = save; + } + else + { + ++depcount; + } + + p = end; + } + else + { + ++p; + } + } + + /* restore the old search path */ + LT_DLFREE (user_search_path); + user_search_path = save_search_path; + + MUTEX_UNLOCK (); + + if (!depcount) + { + errors = 0; + goto cleanup; + } + + names = LT_DLMALLOC (char *, depcount * sizeof (char*)); + if (!names) + { + goto cleanup; + } + + /* now only extract the actual deplibs */ + depcount = 0; + p = deplibs; + while (*p) + { + if (isspace ((int) *p)) + { + ++p; + } + else + { + char *end = p+1; + while (*end && !isspace ((int) *end)) + { + ++end; + } + + if (strncmp(p, "-L", 2) != 0 && strncmp(p, "-R", 2) != 0) + { + char *name; + char save = *end; + *end = 0; /* set a temporary string terminator */ + if (strncmp(p, "-l", 2) == 0) + { + name = LT_DLMALLOC (char, 3+ /* "lib" */ strlen (p+2) + 1); + if (name) + { + sprintf (name, "lib%s", p+2); + } + } + else + { + name = strdup(p); + } + + if (name) + { + names[depcount++] = name; + } + else + { + goto cleanup_names; + } + *end = save; + } + p = end; + } + } + + /* load the deplibs (in reverse order) + At this stage, don't worry if the deplibs do not load correctly, + they may already be statically linked into the loading application + for instance. There will be a more enlightening error message + later on if the loaded module cannot resolve all of its symbols. */ + if (depcount) + { + int j = 0; + + handle->deplibs = (lt_dlhandle*) LT_DLMALLOC (lt_dlhandle *, depcount); + if (!handle->deplibs) + { + goto cleanup; + } + + for (i = 0; i < depcount; ++i) + { + handle->deplibs[j] = lt_dlopenext(names[depcount-1-i]); + if (handle->deplibs[j]) + { + ++j; + } + } + + handle->depcount = j; /* Number of successfully loaded deplibs */ + errors = 0; + } + + cleanup_names: + for (i = 0; i < depcount; ++i) + { + LT_DLFREE (names[i]); + } + + cleanup: + LT_DLFREE (names); +#endif + + return errors; +} + +static int +unload_deplibs(handle) + lt_dlhandle handle; +{ + int i; + int errors = 0; + + if (handle->depcount) + { + for (i = 0; i < handle->depcount; ++i) + { + if (!LT_DLIS_RESIDENT (handle->deplibs[i])) + { + errors += lt_dlclose (handle->deplibs[i]); + } + } + } + + return errors; +} + +static inline int +trim (dest, str) + char **dest; + const char *str; +{ + /* remove the leading and trailing "'" from str + and store the result in dest */ + const char *end = strrchr (str, '\''); + int len = strlen (str); + char *tmp; + + LT_DLFREE (*dest); + + if (len > 3 && str[0] == '\'') + { + tmp = LT_DLMALLOC (char, end - str); + if (!tmp) + { + last_error = LT_DLSTRERROR (NO_MEMORY); + return 1; + } + + strncpy(tmp, &str[1], (end - str) - 1); + tmp[end-str-1] = '\0'; + *dest = tmp; + } + else + { + *dest = 0; + } + + return 0; +} + +static inline int +free_vars( dlname, oldname, libdir, deplibs) + char *dlname; + char *oldname; + char *libdir; + char *deplibs; +{ + LT_DLFREE (dlname); + LT_DLFREE (oldname); + LT_DLFREE (libdir); + LT_DLFREE (deplibs); + + return 0; +} + +lt_dlhandle +lt_dlopen (filename) + const char *filename; +{ + lt_dlhandle handle = 0, newhandle; + const char *ext; + const char *saved_error; + char *canonical = 0, *basename = 0, *dir = 0, *name = 0; + + MUTEX_GETERROR (saved_error); + + /* dlopen self? */ + if (!filename) + { + handle = (lt_dlhandle) LT_DLMALLOC (struct lt_dlhandle_struct, 1); + if (!handle) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return 0; + } + memset( handle, 0, sizeof( struct lt_dlhandle_struct ) ); + + handle->info.ref_count = 0; + handle->depcount = 0; + handle->deplibs = 0; + handle->caller_data = 0; + newhandle = handle; + + /* lt_dlclose()ing yourself is very bad! Disallow it. */ + LT_DLSET_FLAG (handle, LT_DLRESIDENT_FLAG); + + if (tryall_dlopen (&newhandle, 0) != 0) + { + LT_DLFREE (handle); + return 0; + } + goto register_handle; + } + + canonical = canonicalize_path (filename); + if (!canonical) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + LT_DLFREE (handle); + return 0; + } + + /* If the canonical module name is a path (relative or absolute) + then split it into a directory part and a name part. */ + basename = (char*)strrchr (canonical, '/'); + if (basename) + { + ++basename; + dir = LT_DLMALLOC (char, basename - canonical + 1); + if (!dir) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + handle = 0; + goto cleanup; + } + + strncpy (dir, canonical, basename - canonical); + dir[basename - canonical] = '\0'; + } + else + { + basename = canonical; + } + + /* Check whether we are opening a libtool module (.la extension). */ + ext = strrchr(basename, '.'); + if (ext && strcmp(ext, ".la") == 0) + { + /* this seems to be a libtool module */ + FILE *file = 0; + int i; + char *dlname = 0, *old_name = 0; + char *libdir = 0, *deplibs = 0; + char *line; + size_t line_len; + int error = 0; + + /* if we can't find the installed flag, it is probably an + installed libtool archive, produced with an old version + of libtool */ + int installed = 1; + + /* extract the module name from the file name */ + name = LT_DLMALLOC (char, ext - basename + 1); + if (!name) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + handle = 0; + goto cleanup; + } + + /* canonicalize the module name */ + for (i = 0; i < ext - basename; ++i) + { + if (isalnum ((int)(basename[i]))) + { + name[i] = basename[i]; + } + else + { + name[i] = '_'; + } + } + + name[ext - basename] = '\0'; + + /* Now try to open the .la file. If there is no directory name + component, try to find it first in user_search_path and then other + prescribed paths. Otherwise (or in any case if the module was not + yet found) try opening just the module name as passed. */ + if (!dir) + { + file = (FILE*) find_file(basename, user_search_path, &dir, 0); + if (!file) + { + file = (FILE*) find_file(basename, getenv("LTDL_LIBRARY_PATH"), + &dir, 0); + } + +#ifdef LTDL_SHLIBPATH_VAR + if (!file) + { + file = (FILE*) find_file(basename, getenv(LTDL_SHLIBPATH_VAR), + &dir, 0); + } +#endif +#ifdef LTDL_SYSSEARCHPATH + if (!file) + { + file = (FILE*) find_file(basename, sys_search_path, &dir, 0); + } +#endif + } + if (!file) + { + file = fopen (filename, LT_READTEXT_MODE); + } + if (!file) + { + MUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + } + + if (!file) + { + handle = 0; + goto cleanup; + } + + line_len = LT_FILENAME_MAX; + line = LT_DLMALLOC (char, line_len); + if (!line) + { + fclose (file); + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + handle = 0; + goto cleanup; + } + + /* read the .la file */ + while (!feof(file)) + { + line[line_len-2] = '\0'; + if (!fgets (line, line_len, file)) + { + break; + } + + /* Handle the case where we occasionally need to read a line + that is longer than the initial buffer size. */ + while (line[line_len-2] && (!feof (file))) + { + line = LT_DLREALLOC (char, line, line_len *2); + line[line_len*2-2] = '\0'; + if (!line || !fgets (&line[line_len -1], (int) line_len +1, file)) + { + error = 1; + break; + } + line_len *= 2; + } + + if (error) + break; + if (line[0] == '\n' || line[0] == '#') + { + continue; + } + + +#undef STR_DLNAME +#define STR_DLNAME "dlname=" + if (strncmp (line, STR_DLNAME, sizeof (STR_DLNAME) - 1) == 0) + { + error = trim (&dlname, &line[sizeof (STR_DLNAME) - 1]); + } + +#undef STR_OLD_LIBRARY +#define STR_OLD_LIBRARY "old_library=" + else if (strncmp (line, STR_OLD_LIBRARY, + sizeof (STR_OLD_LIBRARY) - 1) == 0) + { + error = trim (&old_name, &line[sizeof (STR_OLD_LIBRARY) - 1]); + } +#undef STR_LIBDIR +#define STR_LIBDIR "libdir=" + else if (strncmp (line, STR_LIBDIR, sizeof (STR_LIBDIR) - 1) == 0) + { + error = trim (&libdir, &line[sizeof(STR_LIBDIR) - 1]); +#if defined(_WIN32) && !defined(__CYGWIN__) + win32_mapDir(&libdir); +#endif + } + +#undef STR_DL_DEPLIBS +#define STR_DL_DEPLIBS "dependency_libs=" + else if (strncmp (line, STR_DL_DEPLIBS, + sizeof (STR_DL_DEPLIBS) - 1) == 0) + { + error = trim (&deplibs, &line[sizeof (STR_DL_DEPLIBS) - 1]); + } + else if (strcmp (line, "installed=yes\n") == 0) + { + installed = 1; + } + else if (strcmp (line, "installed=no\n") == 0) + { + installed = 0; + } + +#undef STR_LIBRARY_NAMES +#define STR_LIBRARY_NAMES "library_names=" + else if (! dlname && strncmp (line, STR_LIBRARY_NAMES, + sizeof (STR_LIBRARY_NAMES) - 1) == 0) + { + char *last_libname; + error = trim (&dlname, &line[sizeof (STR_LIBRARY_NAMES) - 1]); + if (! error && dlname && + (last_libname = (char*)strrchr (dlname, ' ')) != NULL) + { + last_libname = strdup (last_libname + 1); + LT_DLMEM_REASSIGN (dlname, last_libname); + } + } + + if (error) + { + break; + } + } + + fclose (file); + LT_DLFREE (line); + + /* allocate the handle */ + handle = (lt_dlhandle) LT_DLMALLOC (struct lt_dlhandle_struct, 1); + if (!handle || error) + { + LT_DLFREE (handle); + if (!error) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + } + + free_vars (dlname, old_name, libdir, deplibs); + /* handle is already set to 0 */ + goto cleanup; + } + memset( handle, 0, sizeof( struct lt_dlhandle_struct ) ); + + handle->info.ref_count = 0; + if (load_deplibs (handle, deplibs) == 0) + { + newhandle = handle; + /* find_module may replace newhandle */ + if (find_module (&newhandle, dir, libdir, dlname, old_name, installed)) + { + unload_deplibs (handle); + error = 1; + } + } + else + { + error = 1; + } + + free_vars (dlname, old_name, libdir, deplibs); + if (error) + { + LT_DLFREE (handle); + goto cleanup; + } + + if (handle != newhandle) + { + unload_deplibs (handle); + } else { + LT_DLFREE( handle->info.filename ); + handle->info.filename = strdup( filename ); + } + } + else + { + /* not a libtool module */ + handle = (lt_dlhandle) LT_DLMALLOC (struct lt_dlhandle_struct, 1); + if (!handle) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + /* handle is already set to 0 */ + goto cleanup; + } + memset( handle, 0, sizeof( struct lt_dlhandle_struct ) ); + handle->info.ref_count = 0; + /* non-libtool modules don't have dependencies */ + handle->depcount = 0; + handle->deplibs = 0; + newhandle = handle; + + /* If the module has no directory name component, try to find it + first in user_search_path and then other prescribed paths. + Otherwise (or in any case if the module was not yet found) try + opening just the module name as passed. */ + if ((dir || (!find_file (basename, user_search_path, 0, &newhandle) + && !find_file (basename, getenv ("LTDL_LIBRARY_PATH"), + 0, &newhandle) +#ifdef LTDL_SHLIBPATH_VAR + && !find_file (basename, getenv (LTDL_SHLIBPATH_VAR), + 0, &newhandle) +#endif +#ifdef LTDL_SYSSEARCHPATH + && !find_file (basename, sys_search_path, 0, &newhandle) +#endif + )) && tryall_dlopen (&newhandle, filename)) + { + LT_DLFREE (handle); + goto cleanup; + } + } + + register_handle: + LT_DLMEM_REASSIGN (handle, newhandle); + + if (handle->info.ref_count == 0) + { + handle->info.ref_count = 1; + handle->info.name = name; + handle->next = handles; + + MUTEX_LOCK (); + handles = handle; + MUTEX_UNLOCK (); + + name = 0; /* don't free this during `cleanup' */ + } + + MUTEX_SETERROR (saved_error); + + cleanup: + LT_DLFREE (dir); + LT_DLFREE (name); + LT_DLFREE (canonical); + + return handle; +} + +lt_dlhandle +lt_dlopenext (filename) + const char *filename; +{ + lt_dlhandle handle; + char *tmp; + int len; + const char *saved_error; + + MUTEX_GETERROR (saved_error); + + if (!filename) + { + return lt_dlopen (filename); + } + + len = strlen (filename); + if (!len) + { + MUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + return 0; + } + + tmp = LT_DLMALLOC (char, len+4); + if (!tmp) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return 0; + } + strcpy (tmp, filename); + +#ifdef _AIX + tmp[len] = '\0'; + + /* find by info.name in the list */ + handle = sys_dl_search_by_name( tmp ); + if (handle) + { + if( LT_DLGET_FLAG (handle, LT_DLNOTFOUND_FLAG) ) + { + /* don't search libm and libstdc++ over and over again, + * they are hardlinked and symbols are exported by the + * executable */ + MUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + LT_DLFREE (tmp); + return 0; + } + MUTEX_SETERROR (saved_error); + LT_DLFREE (tmp); + return handle; + } +#endif /* _AIX */ + + /* try "filename.la" */ + strcat (tmp, ".la"); + handle = lt_dlopen (tmp); + if (handle) + { + MUTEX_SETERROR (saved_error); + LT_DLFREE (tmp); + return handle; + } + + +#ifdef _AIX + tmp[len] = '\0'; /* delete the ".la" again. */ + + /* versioned shared objects can be in .a's */ + strcat(tmp, ".a"); + handle = lt_dlopen (tmp); + if (handle) + { + MUTEX_SETERROR (saved_error); + LT_DLFREE (tmp); + return handle; + } +#endif /* _AIX */ + +#ifdef LTDL_SHLIB_EXT + /* try "filename.EXT" */ + if (strlen(shlib_ext) > 3) + { + LT_DLFREE (tmp); + tmp = LT_DLMALLOC (char, len + strlen (shlib_ext) + 1); + if (!tmp) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return 0; + } + strcpy (tmp, filename); + } + else + { + tmp[len] = '\0'; + } + + strcat(tmp, shlib_ext); + handle = lt_dlopen (tmp); + if (handle) + { + MUTEX_SETERROR (saved_error); + LT_DLFREE (tmp); + return handle; + } +#endif + + /* try the normal file name */ + handle = lt_dlopen (filename); + if (handle) + { + return handle; + } + +#ifdef _AIX + /* put into the can't be found list */ + tmp[len] = '\0'; + sys_dl_not_found_entry( tmp ); +#endif /* _AIX */ + + MUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + LT_DLFREE (tmp); + return 0; +} + +int +lt_dlclose (handle) + lt_dlhandle handle; +{ + lt_dlhandle cur, last; + int errors = 0; + + MUTEX_LOCK (); + + /* check whether the handle is valid */ + last = cur = handles; + while (cur && handle != cur) + { + last = cur; + cur = cur->next; + } + + if (!cur) + { + MUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + ++errors; + goto done; + } + + handle->info.ref_count--; + + /* Note that even with resident modules, we must track the ref_count + correctly incase the user decides to reset the residency flag + later (even though the API makes no provision for that at the + moment). */ + if (handle->info.ref_count <= 0 && !LT_DLIS_RESIDENT (handle)) + { + lt_user_data data = handle->loader->dlloader_data; + + if (handle != handles) + { + last->next = handle->next; + } + else + { + handles = handle->next; + } + + errors += handle->loader->module_close (data, handle->module); + errors += unload_deplibs(handle); + + LT_DLFREE (handle->info.filename); + LT_DLFREE (handle->info.name); + LT_DLFREE (handle); + + goto done; + } + + if (LT_DLIS_RESIDENT (handle)) + { + MUTEX_SETERROR (LT_DLSTRERROR (CLOSE_RESIDENT_MODULE)); + ++errors; + } + + done: + MUTEX_UNLOCK (); + + return errors; +} + +lt_ptr +lt_dlsym (handle, symbol) + lt_dlhandle handle; + const char *symbol; +{ + int lensym; + char lsym[LT_SYMBOL_LENGTH]; + char *sym; + lt_ptr address; + lt_user_data data; + + if (!handle) + { + MUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + return 0; + } + + if (!symbol) + { + MUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + return 0; + } + + lensym = strlen(symbol); + if (handle->loader->sym_prefix) + { + lensym += strlen(handle->loader->sym_prefix); + } + + if (handle->info.name) + { + lensym += strlen(handle->info.name); + } + + if (lensym + LT_SYMBOL_OVERHEAD < LT_SYMBOL_LENGTH) + { + sym = lsym; + } + else + { + sym = LT_DLMALLOC (char, lensym + LT_SYMBOL_OVERHEAD + 1); + } + + if (!sym) + { + MUTEX_SETERROR (LT_DLSTRERROR (BUFFER_OVERFLOW)); + return 0; + } + + data = handle->loader->dlloader_data; + if (handle->info.name) + { + const char *saved_error; + + MUTEX_GETERROR (saved_error); + + /* this is a libtool module */ + if (handle->loader->sym_prefix) + { + strcpy(sym, handle->loader->sym_prefix); + strcat(sym, handle->info.name); + } + else + { + strcpy(sym, handle->info.name); + } + + strcat(sym, "_LTX_"); + strcat(sym, symbol); + + /* try "modulename_LTX_symbol" */ + address = handle->loader->find_sym (data, handle->module, sym); + if (address) + { + if (sym != lsym) + { + LT_DLFREE (sym); + } + return address; + } + MUTEX_SETERROR (saved_error); + } + + /* otherwise try "symbol" */ + if (handle->loader->sym_prefix) + { + strcpy(sym, handle->loader->sym_prefix); + strcat(sym, symbol); + } + else + { + strcpy(sym, symbol); + } + + address = handle->loader->find_sym (data, handle->module, sym); + if (sym != lsym) + { + LT_DLFREE (sym); + } + + return address; +} + +const char * +lt_dlerror () +{ + const char *error; + + MUTEX_GETERROR (error); + MUTEX_SETERROR (0); + + return error; +} + +int +lt_dladdsearchdir (search_dir) + const char *search_dir; +{ + int errors = 0; + + if (!search_dir || !strlen(search_dir)) + { + return errors; + } + + MUTEX_LOCK (); + if (!user_search_path) + { + user_search_path = strdup (search_dir); + if (!user_search_path) + { + last_error = LT_DLSTRERROR (NO_MEMORY); + ++errors; + } + } + else + { + size_t len = strlen (user_search_path) + 1 + strlen (search_dir); + char *new_search_path = LT_DLMALLOC (char, 1+ len); + + if (!new_search_path) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + ++errors; + } + else + { + sprintf (new_search_path, "%s%c%s", user_search_path, + LT_PATHSEP_CHAR, search_dir); + + LT_DLMEM_REASSIGN (user_search_path, new_search_path); + } + } + MUTEX_UNLOCK (); + + return errors; +} + +int +lt_dlsetsearchpath (search_path) + const char *search_path; +{ + int errors = 0; + + MUTEX_LOCK (); + LT_DLFREE (user_search_path); + MUTEX_UNLOCK (); + + if (!search_path || !strlen (search_path)) + { + return errors; + } + + MUTEX_LOCK (); + user_search_path = strdup (search_path); + if (!user_search_path) + { + ++errors; + } + MUTEX_UNLOCK (); + + return errors; +} + +const char * +lt_dlgetsearchpath () +{ + const char *saved_path; + + MUTEX_LOCK (); + saved_path = user_search_path; + MUTEX_UNLOCK (); + + return saved_path; +} + +int +lt_dlmakeresident (handle) + lt_dlhandle handle; +{ + int errors = 0; + + if (!handle) + { + MUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + ++errors; + } + else + { + LT_DLSET_FLAG (handle, LT_DLRESIDENT_FLAG); + } + + return errors; +} + +int +lt_dlisresident (handle) + lt_dlhandle handle; +{ + if (!handle) + { + MUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + return -1; + } + + return LT_DLIS_RESIDENT (handle); +} + + + + +/* --- MODULE INFORMATION --- */ + +const lt_dlinfo * +lt_dlgetinfo (handle) + lt_dlhandle handle; +{ + if (!handle) + { + MUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + return 0; + } + + return &(handle->info); +} + +lt_dlhandle +lt_dlhandle_next (place) + lt_dlhandle place; +{ + return place ? place->next : (lt_dlhandle) 0; +} + +int +lt_dlforeach (func, data) + int (*func) LT_PARAMS((lt_dlhandle handle, lt_ptr data)); + lt_ptr data; +{ + int errors = 0; + lt_dlhandle cur; + + MUTEX_LOCK (); + + cur = handles; + while (cur) + { + lt_dlhandle tmp = cur; + + cur = cur->next; + if ((*func) (tmp, data)) + { + ++errors; + break; + } + } + + MUTEX_UNLOCK (); + + return errors; +} + +lt_dlcaller_id +lt_dlcaller_register () +{ + static int last_caller_id = -1; + int result; + + MUTEX_LOCK (); + result = ++last_caller_id; + MUTEX_UNLOCK (); + + return result; +} + +#define N_ELEMENTS(a) (sizeof(a) / sizeof(*(a))) + +lt_ptr +lt_dlcaller_set_data (key, handle, data) + lt_dlcaller_id key; + lt_dlhandle handle; + lt_ptr data; +{ + int n_elements = 0; + lt_ptr stale = (lt_ptr) 0; + int i; + + /* This needs to be locked so that the caller data can be updated + simultaneously by different threads. */ + MUTEX_LOCK (); + + if (handle->caller_data) + n_elements = N_ELEMENTS (handle->caller_data); + + for (i = 0; i < n_elements; ++i) + { + if (handle->caller_data[i].key == key) + { + stale = handle->caller_data[i].data; + break; + } + } + + /* Ensure that there is enough room in this handle's caller_data + array to accept a new element. */ + if (i == n_elements) + { + lt_caller_data *temp + = LT_DLREALLOC (lt_caller_data, handle->caller_data, 1+ n_elements); + + if (temp == 0) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + stale = (lt_ptr) 0; + goto done; + } + else + { + handle->caller_data = temp; + } + + /* We only need this if we needed to allocate a new caller_data. */ + handle->caller_data[i].key = key; + } + + handle->caller_data[i].data = data; + + done: + MUTEX_UNLOCK (); + + return stale; +} + +lt_ptr +lt_dlcaller_get_data (key, handle) + lt_dlcaller_id key; + lt_dlhandle handle; +{ + lt_ptr result = (lt_ptr) 0; + int n_elements = 0; + + /* This needs to be locked so that the caller data isn't updated by + another thread part way through this function. */ + MUTEX_LOCK (); + + if (handle->caller_data) + n_elements = N_ELEMENTS (handle->caller_data); + + /* Locate the index of the element with a matching KEY. */ + { + int i; + for (i = 0; i < n_elements; ++i) + { + if (handle->caller_data[i].key == key) + { + result = handle->caller_data[i].data; + break; + } + } + } + + MUTEX_UNLOCK (); + + return result; +} + + + +/* --- USER MODULE LOADER API --- */ + + +int +lt_dlloader_add (place, dlloader, loader_name) + lt_dlloader *place; + const struct lt_user_dlloader *dlloader; + const char *loader_name; +{ + int errors = 0; + lt_dlloader *node = 0, *ptr = 0; + + if ((dlloader == 0) /* diagnose null parameters */ + || (dlloader->module_open == 0) + || (dlloader->module_close == 0) + || (dlloader->find_sym == 0)) + { + MUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + return 1; + } + + /* Create a new dlloader node with copies of the user callbacks. */ + node = LT_DLMALLOC (lt_dlloader, 1); + if (node == 0) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return 1; + } + + node->next = 0; + node->loader_name = loader_name; + node->sym_prefix = dlloader->sym_prefix; + node->dlloader_exit = dlloader->dlloader_exit; + node->module_open = dlloader->module_open; + node->module_close = dlloader->module_close; + node->find_sym = dlloader->find_sym; + node->dlloader_data = dlloader->dlloader_data; + + MUTEX_LOCK (); + if (!loaders) + { + /* If there are no loaders, NODE becomes the list! */ + loaders = node; + } + else if (!place) + { + /* If PLACE is not set, add NODE to the end of the + LOADERS list. */ + for (ptr = loaders; ptr->next; ptr = ptr->next) + { + /*NOWORK*/; + } + + ptr->next = node; + } + else if (loaders == place) + { + /* If PLACE is the first loader, NODE goes first. */ + node->next = place; + loaders = node; + } + else + { + /* Find the node immediately preceding PLACE. */ + for (ptr = loaders; ptr->next != place; ptr = ptr->next) + { + /*NOWORK*/; + } + + if (ptr->next != place) + { + last_error = LT_DLSTRERROR (INVALID_LOADER); + ++errors; + } + else + { + /* Insert NODE between PTR and PLACE. */ + node->next = place; + ptr->next = node; + } + } + + MUTEX_UNLOCK (); + + return errors; +} + +int +lt_dlloader_remove (loader_name) + const char *loader_name; +{ + lt_dlloader *place = lt_dlloader_find (loader_name); + lt_dlhandle handle; + int errors = 0; + + if (!place) + { + MUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + return 1; + } + + MUTEX_LOCK (); + + /* Fail if there are any open modules which use this loader. */ + for (handle = handles; handle; handle = handle->next) + { + if (handle->loader == place) + { + MUTEX_SETERROR (LT_DLSTRERROR (REMOVE_LOADER)); + ++errors; + goto done; + } + } + + if (place == loaders) + { + /* PLACE is the first loader in the list. */ + loaders = loaders->next; + } + else + { + /* Find the loader before the one being removed. */ + lt_dlloader *prev; + for (prev = loaders; prev->next; prev = prev->next) + { + if (!strcmp (prev->next->loader_name, loader_name)) + { + break; + } + } + + place = prev->next; + prev->next = prev->next->next; + } + + if (place->dlloader_exit) + { + errors = place->dlloader_exit (place->dlloader_data); + } + + LT_DLFREE (place); + + done: + MUTEX_UNLOCK (); + + return errors; +} + +lt_dlloader * +lt_dlloader_next (place) + lt_dlloader *place; +{ + lt_dlloader *next; + + MUTEX_LOCK (); + next = place ? place->next : loaders; + MUTEX_UNLOCK (); + + return next; +} + +const char * +lt_dlloader_name (place) + lt_dlloader *place; +{ + const char *name = 0; + + if (place) + { + MUTEX_LOCK (); + name = place ? place->loader_name : 0; + MUTEX_UNLOCK (); + } + else + { + MUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + } + + return name; +} + +lt_user_data * +lt_dlloader_data (place) + lt_dlloader *place; +{ + lt_user_data *data = 0; + + if (place) + { + MUTEX_LOCK (); + data = place ? &(place->dlloader_data) : 0; + MUTEX_UNLOCK (); + } + else + { + MUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + } + + return data; +} + +lt_dlloader * +lt_dlloader_find (loader_name) + const char *loader_name; +{ + lt_dlloader *place = 0; + + MUTEX_LOCK (); + for (place = loaders; place; place = place->next) + { + if (strcmp (place->loader_name, loader_name) == 0) + { + break; + } + } + MUTEX_UNLOCK (); + + return place; +} + +#ifdef _AIX + +/* #define DBG_PRNT(a) fprintf a ; */ +#define DBG_PRNT(a) + +static void +sys_dl_debug_print_loaded( const char* filename ) +{ + int ret; + static unsigned char buffer[1024*1024]; + struct ld_info* info; + + ret = loadquery( L_GETINFO, buffer, 1024*1024 ); + if( ret >= 0 ) + { + DBG_PRNT((stderr, "%d: Successfully loaded %s\n", + __LINE__, filename )) + info = (struct ld_info*)buffer; + do + { + const char* c; + const char* d; + c = info->ldinfo_filename; + d = &c[strlen(c)]; + d++; + DBG_PRNT((stderr, "%d: path name %s, member name %s\n", + __LINE__, + c,d)) + info = (struct ld_info*)(((char*)info)+info->ldinfo_next); + } + while( info->ldinfo_next != 0 ); + } + else if( errno == ENOMEM ) + { + DBG_PRNT((stderr, "%d: Successfully loaded %s, loadquery needs larger buffer\n", + __LINE__, filename )) + } + else + { + DBG_PRNT((stderr, "Loadquery failure\n")) + } +} + +static void +sys_dl_debug_print_handle( lt_dlhandle handle ) +{ + DBG_PRNT((stderr," > next = %ld\n", (long)handle->next )) + DBG_PRNT((stderr," > loader = %ld\n", (long)handle->loader )) + DBG_PRNT((stderr," > info.filename = %s\n", handle->info.filename )) + DBG_PRNT((stderr," > info.name = %s\n", handle->info.name )) + DBG_PRNT((stderr," > info.ref_count= %d\n", handle->info.ref_count )) + DBG_PRNT((stderr," > depcount = %d\n", handle->depcount )) + DBG_PRNT((stderr," > resident flags %s\n", + (LT_DLGET_FLAG (handle, LT_DLRESIDENT_FLAG)?"yes":"no"))) + DBG_PRNT((stderr," > not found flags %s\n", + (LT_DLGET_FLAG (handle, LT_DLNOTFOUND_FLAG)?"yes":"no"))) +} + +static void +sys_dl_init( ) +{ + char* buffer = NULL; + size_t buf_size = 512; + int ret; + const char* libname; + const char* modname; + struct ld_info* info; + lt_dlhandle cur; + lt_dlhandle handle; + int already_listed; + const char* last_slash; + const char* last_dot; + + do + { + buf_size *= 2; + if( buffer != NULL ) LT_DLFREE( buffer ); + buffer = LT_DLMALLOC( char, buf_size ); + ret = loadquery( L_GETINFO, buffer, buf_size ); + } + while( ret==-1 && errno==ENOMEM ); + + if( ret >= 0 ) + { + info = (struct ld_info*)buffer; + do + { + libname = info->ldinfo_filename; + modname = &libname[strlen(libname)]; + modname += 1; + already_listed = 0; + + cur = handles; + while (cur) + { + if( cur->info.filename && + !strcmp( cur->info.filename, libname ) ) + { + already_listed = 1; + break; + } + cur = cur->next; + } + + if( already_listed == 0 ) + { + handle = (lt_dlhandle) LT_DLMALLOC (struct lt_dlhandle_struct, 1); + if (!handle) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + LT_DLFREE( buffer ); + return; + } + memset( handle, 0, sizeof( struct lt_dlhandle_struct ) ); + + last_slash = strrchr( libname, '/' ); + if( last_slash == NULL ) + { + last_slash = libname; + } + else + { + last_slash++; + } + last_dot = strrchr( last_slash, '.' ); + if( last_dot == NULL ) + { + last_dot = &last_slash[strlen(last_slash)]; + } + + handle->info.name = LT_DLMALLOC( char, last_dot-last_slash+1 ); + strncpy( handle->info.name, last_slash, last_dot-last_slash ); + handle->info.name[last_dot-last_slash] = '\0'; + + handle->loader = lt_dlloader_find ("dlopen"); + handle->info.filename = strdup( libname ); + handle->info.ref_count = 1; + handle->depcount = 0; + handle->deplibs = 0; + handle->module = dlopen( libname, lt_dlopen_flag ); + handle->system = 0; + handle->caller_data = 0; + LT_DLSET_FLAG (handle, LT_DLRESIDENT_FLAG); + + MUTEX_LOCK (); + handle->next = handles; + handles = handle; + MUTEX_UNLOCK (); + } + + info = (struct ld_info*)(((char*)info)+info->ldinfo_next); + } + while( info->ldinfo_next != 0 ); + } + + if( buffer != NULL ) LT_DLFREE( buffer ); +} + +static lt_dlhandle +sys_dl_search_by_name( const char* name ) +{ + lt_dlhandle cur; + const char* la; + int inlen; + + cur = handles; + + while (cur) + { + if( cur->info.name && name ) + { + if( !strcmp( cur->info.name, name ) ) + { + if( cur->info.filename ) + { + la = strrchr( cur->info.filename, '.' ); + if( !la || strcmp(la,".la") ) + { + return cur; + } + } + } + } + if( cur->info.filename && name ) + { + if( !strcmp( cur->info.filename, name ) ) + { + return cur; + } + } + cur = cur->next; + } + return NULL; +} + +static void +sys_dl_not_found_entry( const char* tmp ) +{ + lt_dlhandle handle; + + handle = (lt_dlhandle) LT_DLMALLOC (struct lt_dlhandle_struct, 1); + if (!handle) + { + MUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return; + } + memset( handle, 0, sizeof( struct lt_dlhandle_struct ) ); + + handle->loader = NULL; + + handle->info.filename = strdup( tmp ); + handle->info.name = strdup( tmp ); + handle->info.ref_count = 0; + handle->depcount = 0; + handle->deplibs = 0; + handle->module = 0; + handle->system = 0; + handle->caller_data = 0; + + LT_DLSET_FLAG (handle, LT_DLNOTFOUND_FLAG); + + MUTEX_LOCK (); + handle->next = handles; + handles = handle; + MUTEX_UNLOCK (); +} + +#endif /* _AIX */ |