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