125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2011 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "gtm_string.h"
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#include <dlfcn.h>
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#include "rtnhdr.h"
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#include "real_len.h" /* for COPY_DLERR_MSG */
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#include "lv_val.h" /* needed for "fgncal.h" */
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#include "fgncal.h"
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#include "util.h"
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#include "gtmmsg.h"
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#include "error.h"
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/* below comments applicable only to tru64 */
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/* dlsym() is bound to return short pointer because of -taso loader flag. GTMASSERT on this assumption.
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* dlopen() returns a long pointer. All the callers of fgn_getpak() should take care of this.
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* dlclose() uses the handle generated above. So, the same semantics apply.
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* dlerror() returns a char pointer, which is again long.
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*/
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/* --- end of tru64 comments --- */
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/* fgn_getinfo.c - external call lookup package
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*
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* Version Common to all *NIX platforms execept zOS
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* Note :- There is another zOS-specific version of the same file.
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*/
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/* Lookup package. Return package handle if success, NULL otherwise.
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* package_name - DLL name
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* msgtype - message severity of the errors reported if any.
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* Note - Errors are not issued if msgtype is SUCCESS, which is to be used if the callers are not
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* interested in message report and not willing to have condition handler overhead.
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*/
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void_ptr_t fgn_getpak(char *package_name, int msgtype)
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{
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void_ptr_t ret_handle;
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char_ptr_t dummy_err_str;
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char err_str[MAX_ERRSTR_LEN]; /* needed as util_out_print doesn't handle 64bit pointers */
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error_def(ERR_TEXT);
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error_def(ERR_DLLNOOPEN);
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if (!(ret_handle = dlopen(package_name, RTLD_LAZY)))
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{
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if (SUCCESS != msgtype)
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{
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assert(!(msgtype & ~SEV_MSK));
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COPY_DLLERR_MSG(dummy_err_str, err_str);
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rts_error(VARLSTCNT(8) MAKE_MSG_TYPE(ERR_DLLNOOPEN, msgtype), 2, LEN_AND_STR(package_name),
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ERR_TEXT, 2, LEN_AND_STR(err_str));
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}
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}
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return ret_handle;
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}
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/* Lookup an external function. Return function address if success, NULL otherwise.
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* package_handle - DLL handle returned by fgn_getpak
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* entry_name - symbol name to be looked up
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* msgtype - message severity of the errors reported if any.
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* Note: If msgtype is SUCCESS, errors are not issued. It is useful if the callers are not
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* interested in message report and not willing to have condition handler overhead (eg. zro_search).
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*/
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fgnfnc fgn_getrtn(void_ptr_t package_handle, mstr *entry_name, int msgtype)
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{
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void_ptr_t sym_addr;
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char_ptr_t dummy_err_str;
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void *short_sym_addr;
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char err_str[MAX_ERRSTR_LEN]; /* needed as util_out_print doesn't handle 64bit pointers */
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error_def(ERR_DLLNORTN);
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error_def(ERR_TEXT);
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if (!(sym_addr = dlsym(package_handle, entry_name->addr)))
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{
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if (SUCCESS != msgtype)
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{
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assert(!(msgtype & ~SEV_MSK));
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COPY_DLLERR_MSG(dummy_err_str, err_str);
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rts_error(VARLSTCNT(8) MAKE_MSG_TYPE(ERR_DLLNORTN, msgtype), 2, LEN_AND_STR(entry_name->addr),
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ERR_TEXT, 2, LEN_AND_STR(err_str));
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}
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} else
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{ /* Tru64 - dlsym() is bound to return short pointer because of ld -taso flag used for GT.M */
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#ifdef __osf__
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short_sym_addr = sym_addr;
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if (short_sym_addr != sym_addr)
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{
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sym_addr = NULL;
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/* always report an error irrespective of msgtype - since this code should never
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* have executed and/or the DLL might need to be rebuilt with 32-bit options */
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rts_error(VARLSTCNT(8) ERR_DLLNORTN, 2, LEN_AND_STR(entry_name->addr),
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ERR_TEXT, 2, LEN_AND_LIT("Symbol is loaded above the lower 31-bit address space"));
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}
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#endif
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}
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return (fgnfnc)sym_addr;
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}
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void fgn_closepak(void_ptr_t package_handle, int msgtype)
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{
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char_ptr_t dummy_err_str;
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int status;
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char err_str[MAX_ERRSTR_LEN];
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error_def(ERR_TEXT);
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error_def(ERR_DLLNOCLOSE);
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status = dlclose(package_handle);
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if (0 != status && SUCCESS != msgtype)
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{
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assert(!(msgtype & ~SEV_MSK));
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COPY_DLLERR_MSG(dummy_err_str, err_str);
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rts_error(VARLSTCNT(6) MAKE_MSG_TYPE(ERR_DLLNOCLOSE, msgtype), 0, ERR_TEXT, 2, LEN_AND_STR(err_str));
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}
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}
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