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https://github.com/ruby/ruby.git
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491 lines
12 KiB
C
491 lines
12 KiB
C
/**********************************************************************
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dln.c -
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$Author$
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created at: Tue Jan 18 17:05:06 JST 1994
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Copyright (C) 1993-2007 Yukihiro Matsumoto
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**********************************************************************/
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#ifdef RUBY_EXPORT
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#include "ruby/ruby.h"
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#define dln_notimplement rb_notimplement
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#define dln_memerror rb_memerror
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#define dln_exit rb_exit
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#define dln_loaderror rb_loaderror
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#define dln_fatalerror rb_fatal
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#else
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#define dln_notimplement --->>> dln not implemented <<<---
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#define dln_memerror abort
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#define dln_exit exit
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static void dln_loaderror(const char *format, ...);
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#define dln_fatalerror dln_loaderror
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#endif
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#include "dln.h"
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#include "internal.h"
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#include "internal/compilers.h"
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#ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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#endif
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#if defined(HAVE_ALLOCA_H)
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#include <alloca.h>
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#else
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# include <strings.h>
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#endif
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#ifndef xmalloc
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void *xmalloc();
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void *xcalloc();
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void *xrealloc();
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#endif
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#undef free
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#define free(x) xfree(x)
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#include <stdio.h>
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#if defined(_WIN32)
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#include "missing/file.h"
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifndef S_ISDIR
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# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
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#endif
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#ifdef HAVE_SYS_PARAM_H
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# include <sys/param.h>
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#endif
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#ifndef MAXPATHLEN
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# define MAXPATHLEN 1024
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifndef dln_loaderror
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static void
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dln_loaderror(const char *format, ...)
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{
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va_list ap;
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va_start(ap, format);
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vfprintf(stderr, format, ap);
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va_end(ap);
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abort();
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}
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#endif
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#if defined(HAVE_DLOPEN) && !defined(_AIX) && !defined(_UNICOSMP)
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/* dynamic load with dlopen() */
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# define USE_DLN_DLOPEN
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#endif
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#if defined(__hp9000s300) || ((defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)) && !defined(__ELF__)) || defined(NeXT)
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# define EXTERNAL_PREFIX "_"
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#else
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# define EXTERNAL_PREFIX ""
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#endif
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#define FUNCNAME_PREFIX EXTERNAL_PREFIX"Init_"
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#if defined __CYGWIN__ || defined DOSISH
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#define isdirsep(x) ((x) == '/' || (x) == '\\')
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#else
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#define isdirsep(x) ((x) == '/')
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#endif
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#if defined(_WIN32) || defined(USE_DLN_DLOPEN)
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static size_t
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init_funcname_len(const char **file)
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{
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const char *p = *file, *base, *dot = NULL;
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/* Load the file as an object one */
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for (base = p; *p; p++) { /* Find position of last '/' */
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if (*p == '.' && !dot) dot = p;
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if (isdirsep(*p)) base = p+1, dot = NULL;
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}
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*file = base;
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/* Delete suffix if it exists */
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return (dot ? dot : p) - base;
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}
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static const char funcname_prefix[sizeof(FUNCNAME_PREFIX) - 1] = FUNCNAME_PREFIX;
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#define init_funcname(buf, file) do {\
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const char *base = (file);\
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const size_t flen = init_funcname_len(&base);\
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const size_t plen = sizeof(funcname_prefix);\
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char *const tmp = ALLOCA_N(char, plen+flen+1);\
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if (!tmp) {\
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dln_memerror();\
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}\
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memcpy(tmp, funcname_prefix, plen);\
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memcpy(tmp+plen, base, flen);\
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tmp[plen+flen] = '\0';\
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*(buf) = tmp;\
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} while (0)
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#endif
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#ifdef USE_DLN_DLOPEN
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# include <dlfcn.h>
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#endif
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#if defined(_AIX)
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#include <ctype.h> /* for isdigit() */
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#include <errno.h> /* for global errno */
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#include <sys/ldr.h>
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#endif
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#ifdef NeXT
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#if NS_TARGET_MAJOR < 4
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#include <mach-o/rld.h>
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#else
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#include <mach-o/dyld.h>
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#ifndef NSLINKMODULE_OPTION_BINDNOW
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#define NSLINKMODULE_OPTION_BINDNOW 1
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#endif
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#endif
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#endif
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#ifdef _WIN32
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#include <windows.h>
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#include <imagehlp.h>
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#endif
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#ifdef _WIN32
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static const char *
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dln_strerror(char *message, size_t size)
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{
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int error = GetLastError();
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char *p = message;
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size_t len = snprintf(message, size, "%d: ", error);
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#define format_message(sublang) FormatMessage(\
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FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, \
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NULL, error, MAKELANGID(LANG_NEUTRAL, (sublang)), \
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message + len, size - len, NULL)
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if (format_message(SUBLANG_ENGLISH_US) == 0)
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format_message(SUBLANG_DEFAULT);
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for (p = message + len; *p; p++) {
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if (*p == '\n' || *p == '\r')
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*p = ' ';
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}
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return message;
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}
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#define dln_strerror() dln_strerror(message, sizeof message)
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#elif defined USE_DLN_DLOPEN
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static const char *
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dln_strerror(void)
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{
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return (char*)dlerror();
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}
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#endif
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#if defined(_AIX)
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static void
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aix_loaderror(const char *pathname)
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{
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char *message[1024], errbuf[1024];
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int i;
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#define ERRBUF_APPEND(s) strlcat(errbuf, (s), sizeof(errbuf))
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snprintf(errbuf, sizeof(errbuf), "load failed - %s. ", pathname);
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if (loadquery(L_GETMESSAGES, &message[0], sizeof(message)) != -1) {
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ERRBUF_APPEND("Please issue below command for detailed reasons:\n\t");
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ERRBUF_APPEND("/usr/sbin/execerror ruby ");
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for (i=0; message[i]; i++) {
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ERRBUF_APPEND("\"");
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ERRBUF_APPEND(message[i]);
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ERRBUF_APPEND("\" ");
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}
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ERRBUF_APPEND("\n");
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}
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else {
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ERRBUF_APPEND(strerror(errno));
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ERRBUF_APPEND("[loadquery failed]");
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}
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dln_loaderror("%s", errbuf);
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}
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#endif
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#if defined _WIN32 && defined RUBY_EXPORT
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HANDLE rb_libruby_handle(void);
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static int
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rb_w32_check_imported(HMODULE ext, HMODULE mine)
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{
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ULONG size;
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const IMAGE_IMPORT_DESCRIPTOR *desc;
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desc = ImageDirectoryEntryToData(ext, TRUE, IMAGE_DIRECTORY_ENTRY_IMPORT, &size);
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if (!desc) return 0;
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while (desc->Name) {
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PIMAGE_THUNK_DATA pint = (PIMAGE_THUNK_DATA)((char *)ext + desc->Characteristics);
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PIMAGE_THUNK_DATA piat = (PIMAGE_THUNK_DATA)((char *)ext + desc->FirstThunk);
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for (; piat->u1.Function; piat++, pint++) {
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static const char prefix[] = "rb_";
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PIMAGE_IMPORT_BY_NAME pii;
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const char *name;
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if (IMAGE_SNAP_BY_ORDINAL(pint->u1.Ordinal)) continue;
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pii = (PIMAGE_IMPORT_BY_NAME)((char *)ext + (size_t)pint->u1.AddressOfData);
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name = (const char *)pii->Name;
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if (strncmp(name, prefix, sizeof(prefix) - 1) == 0) {
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FARPROC addr = GetProcAddress(mine, name);
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if (addr) return (FARPROC)piat->u1.Function == addr;
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}
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}
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desc++;
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}
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return 1;
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}
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#endif
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#if defined(DLN_NEEDS_ALT_SEPARATOR) && DLN_NEEDS_ALT_SEPARATOR
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#define translit_separator(src) do { \
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char *tmp = ALLOCA_N(char, strlen(src) + 1), *p = tmp, c; \
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do { \
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*p++ = ((c = *file++) == '/') ? DLN_NEEDS_ALT_SEPARATOR : c; \
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} while (c); \
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(src) = tmp; \
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} while (0)
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#else
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#define translit_separator(str) (void)(str)
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#endif
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#ifdef USE_DLN_DLOPEN
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# include "ruby/internal/stdbool.h"
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# include "internal/warnings.h"
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static bool
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dln_incompatible_func(void *handle, const char *funcname, void *const fp, const char **libname)
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{
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Dl_info dli;
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void *ex = dlsym(handle, funcname);
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if (!ex) return false;
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if (ex == fp) return false;
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if (dladdr(ex, &dli)) {
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*libname = dli.dli_fname;
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}
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return true;
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}
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COMPILER_WARNING_PUSH
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#if defined(__clang__) || GCC_VERSION_SINCE(4, 2, 0)
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COMPILER_WARNING_IGNORED(-Wpedantic)
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#endif
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static bool
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dln_incompatible_library_p(void *handle, const char **libname)
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{
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#define check_func(func) \
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if (dln_incompatible_func(handle, EXTERNAL_PREFIX #func, (void *)&func, libname)) \
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return true
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check_func(ruby_xmalloc);
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return false;
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}
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COMPILER_WARNING_POP
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#endif
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#if !defined(MAC_OS_X_VERSION_MIN_REQUIRED)
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/* assume others than old Mac OS X have no problem */
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# define dln_disable_dlclose() false
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#elif MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_11
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/* targeting newer versions only */
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# define dln_disable_dlclose() false
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#elif !defined(MAC_OS_X_VERSION_10_11) || \
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(MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_11)
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/* targeting older versions only */
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# define dln_disable_dlclose() true
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#else
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/* support both versions, and check at runtime */
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# include <sys/sysctl.h>
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static bool
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dln_disable_dlclose(void)
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{
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int mib[] = {CTL_KERN, KERN_OSREV};
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int32_t rev;
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size_t size = sizeof(rev);
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if (sysctl(mib, numberof(mib), &rev, &size, NULL, 0)) return true;
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if (rev < MAC_OS_X_VERSION_10_11) return true;
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return false;
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}
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#endif
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#if defined(_WIN32) || defined(USE_DLN_DLOPEN)
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static void *
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dln_open(const char *file)
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{
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static const char incompatible[] = "incompatible library version";
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const char *error = NULL;
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void *handle;
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#if defined(_WIN32)
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char message[1024];
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/* Convert the file path to wide char */
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WCHAR *winfile = rb_w32_mbstr_to_wstr(CP_UTF8, file, -1, NULL);
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if (!winfile) {
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dln_memerror();
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}
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/* Load file */
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handle = LoadLibraryW(winfile);
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free(winfile);
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if (!handle) {
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error = dln_strerror();
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goto failed;
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}
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# if defined(RUBY_EXPORT)
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if (!rb_w32_check_imported(handle, rb_libruby_handle())) {
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FreeLibrary(handle);
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error = incompatible;
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goto failed;
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}
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# endif
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#elif defined(USE_DLN_DLOPEN)
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# ifndef RTLD_LAZY
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# define RTLD_LAZY 1
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# endif
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# ifdef __INTERIX
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# undef RTLD_GLOBAL
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# endif
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# ifndef RTLD_GLOBAL
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# define RTLD_GLOBAL 0
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# endif
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/* Load file */
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handle = dlopen(file, RTLD_LAZY|RTLD_GLOBAL);
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if (handle == NULL) {
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error = dln_strerror();
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goto failed;
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}
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# if defined(RUBY_EXPORT)
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{
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const char *libruby_name = NULL;
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if (dln_incompatible_library_p(handle, &libruby_name)) {
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if (dln_disable_dlclose()) {
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/* dlclose() segfaults */
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if (libruby_name) {
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dln_fatalerror("linked to incompatible %s - %s", libruby_name, file);
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}
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dln_fatalerror("%s - %s", incompatible, file);
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}
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else {
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dlclose(handle);
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if (libruby_name) {
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dln_loaderror("linked to incompatible %s - %s", libruby_name, file);
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}
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error = incompatible;
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goto failed;
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}
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}
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}
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# endif
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#endif
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return handle;
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failed:
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dln_loaderror("%s - %s", error, file);
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}
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static void *
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dln_sym(void *handle, const char *symbol)
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{
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void *func;
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const char *error;
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#if defined(_WIN32)
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char message[1024];
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func = GetProcAddress(handle, symbol);
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if (func == NULL) {
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error = dln_strerror();
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goto failed;
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}
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#elif defined(USE_DLN_DLOPEN)
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func = dlsym(handle, symbol);
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if (func == NULL) {
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const size_t errlen = strlen(error = dln_strerror()) + 1;
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error = memcpy(ALLOCA_N(char, errlen), error, errlen);
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goto failed;
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}
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#endif
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return func;
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failed:
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dln_loaderror("%s - %s", error, symbol);
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}
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#endif
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#if defined(RUBY_DLN_CHECK_ABI) && defined(USE_DLN_DLOPEN)
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static bool
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abi_check_enabled_p(void)
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{
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const char *val = getenv("RUBY_ABI_CHECK");
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return val == NULL || !(val[0] == '0' && val[1] == '\0');
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}
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#endif
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void *
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dln_load(const char *file)
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{
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#if defined(_WIN32) || defined(USE_DLN_DLOPEN)
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void *handle = dln_open(file);
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#ifdef RUBY_DLN_CHECK_ABI
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unsigned long long (*abi_version_fct)(void) = (unsigned long long(*)(void))dln_sym(handle, "ruby_abi_version");
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unsigned long long binary_abi_version = (*abi_version_fct)();
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if (binary_abi_version != ruby_abi_version() && abi_check_enabled_p()) {
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dln_loaderror("incompatible ABI version of binary - %s", file);
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}
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#endif
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char *init_fct_name;
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init_funcname(&init_fct_name, file);
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void (*init_fct)(void) = (void(*)(void))dln_sym(handle, init_fct_name);
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/* Call the init code */
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(*init_fct)();
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return handle;
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#elif defined(_AIX)
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{
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void (*init_fct)(void);
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init_fct = (void(*)(void))load((char*)file, 1, 0);
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if (init_fct == NULL) {
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aix_loaderror(file);
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}
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if (loadbind(0, (void*)dln_load, (void*)init_fct) == -1) {
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aix_loaderror(file);
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}
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(*init_fct)();
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return (void*)init_fct;
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}
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#else
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dln_notimplement();
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#endif
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return 0; /* dummy return */
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}
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