gcc/libjava/java/lang/natRuntime.cc

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// natRuntime.cc - Implementation of native side of Runtime class.
/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation
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This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
#include <config.h>
#include <platform.h>
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#include <stdlib.h>
#include <gcj/cni.h>
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#include <jvm.h>
#include <java-props.h>
#include <java/lang/Long.h>
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#include <java/lang/Runtime.h>
#include <java/lang/UnknownError.h>
#include <java/lang/UnsatisfiedLinkError.h>
#include <gnu/gcj/runtime/FileDeleter.h>
#include <gnu/gcj/runtime/FinalizerThread.h>
#include <java/io/File.h>
#include <java/util/Properties.h>
#include <java/util/TimeZone.h>
#include <java/lang/StringBuffer.h>
#include <java/lang/Process.h>
#include <java/lang/ConcreteProcess.h>
#include <java/lang/ClassLoader.h>
#include <gnu/gcj/runtime/StackTrace.h>
#include <java/lang/ArrayIndexOutOfBoundsException.h>
#include <jni.h>
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#include <errno.h>
#ifdef HAVE_UNAME
#include <sys/utsname.h>
#endif
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#ifdef HAVE_LANGINFO_H
#include <langinfo.h>
#endif
#ifdef USE_LTDL
#include <ltdl.h>
/* FIXME: we don't always need this. The next libtool will let us use
AC_LTDL_PREOPEN to see if we do. */
extern const lt_dlsymlist lt_preloaded_symbols[1] = { { 0, 0 } };
struct lookup_data
{
const char *symname;
void *result;
};
static int
find_symbol (lt_dlhandle handle, lt_ptr_t data)
{
lookup_data *ld = (lookup_data *) data;
ld->result = lt_dlsym (handle, ld->symname);
return ld->result != NULL;
}
void *
_Jv_FindSymbolInExecutable (const char *symname)
{
lookup_data data;
data.symname = symname;
data.result = NULL;
lt_dlforeach (find_symbol, (lt_ptr_t) &data);
return data.result;
}
void
_Jv_SetDLLSearchPath (const char *path)
{
lt_dlsetsearchpath (path);
}
#else
void *
_Jv_FindSymbolInExecutable (const char *)
{
return NULL;
}
void
_Jv_SetDLLSearchPath (const char *)
{
// Nothing.
}
#endif /* USE_LTDL */
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void
java::lang::Runtime::exitInternal (jint status)
{
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// Make status right for Unix. This is perhaps strange.
if (status < 0 || status > 255)
status = 255;
if (finalizeOnExit)
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_Jv_RunAllFinalizers ();
// Delete all files registered with File.deleteOnExit()
gnu::gcj::runtime::FileDeleter::deleteOnExitNow ();
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::exit (status);
}
jlong
java::lang::Runtime::freeMemory (void)
{
return _Jv_GCFreeMemory ();
}
void
java::lang::Runtime::gc (void)
{
_Jv_RunGC ();
}
#ifdef USE_LTDL
// List of names for JNI_OnLoad.
static const char *onload_names[] = _Jv_platform_onload_names;
#endif
void
java::lang::Runtime::_load (jstring path, jboolean do_search)
{
JvSynchronize sync (this);
using namespace java::lang;
#ifdef USE_LTDL
jint len = _Jv_GetStringUTFLength (path);
char buf[len + 1 + strlen (_Jv_platform_solib_prefix)
+ strlen (_Jv_platform_solib_suffix)];
int offset = 0;
if (do_search)
{
strcpy (buf, _Jv_platform_solib_prefix);
offset = strlen (_Jv_platform_solib_prefix);
}
jsize total = JvGetStringUTFRegion (path, 0, path->length(), &buf[offset]);
buf[offset + total] = '\0';
char *lib_name = buf;
if (do_search)
{
ClassLoader *sys = ClassLoader::getSystemClassLoader();
ClassLoader *look = NULL;
gnu::gcj::runtime::StackTrace *t = new gnu::gcj::runtime::StackTrace(10);
try
{
for (int i = 0; i < 10; ++i)
{
jclass klass = t->classAt(i);
if (klass != NULL)
{
ClassLoader *loader = klass->getClassLoaderInternal();
if (loader != NULL && loader != sys)
{
look = loader;
break;
}
}
}
}
catch (::java::lang::ArrayIndexOutOfBoundsException *e)
{
}
if (look != NULL)
{
// Don't include solib prefix in string passed to
// findLibrary.
jstring name = look->findLibrary(JvNewStringUTF(&buf[offset]));
if (name != NULL)
{
len = _Jv_GetStringUTFLength (name);
lib_name = (char *) _Jv_AllocBytes(len + 1);
total = JvGetStringUTFRegion (name, 0,
name->length(), lib_name);
lib_name[total] = '\0';
// Don't append suffixes any more; we have the full file
// name.
do_search = false;
}
}
}
lt_dlhandle h;
// FIXME: make sure path is absolute.
{
// Synchronize on java.lang.Class. This is to protect the class chain from
// concurrent modification by class registration calls which may be run
// during the dlopen().
JvSynchronize sync (&java::lang::Class::class$);
h = do_search ? lt_dlopenext (lib_name) : lt_dlopen (lib_name);
}
if (h == NULL)
{
const char *msg = lt_dlerror ();
jstring str = JvNewStringLatin1 (lib_name);
str = str->concat (JvNewStringLatin1 (": "));
str = str->concat (JvNewStringLatin1 (msg));
throw new UnsatisfiedLinkError (str);
}
// Search for JNI_OnLoad function.
void *onload = NULL;
const char **name = onload_names;
while (*name != NULL)
{
onload = lt_dlsym (h, *name);
if (onload != NULL)
break;
++name;
}
if (onload != NULL)
{
JavaVM *vm = _Jv_GetJavaVM ();
if (vm == NULL)
{
// FIXME: what?
return;
}
jint vers = ((jint (JNICALL *) (JavaVM *, void *)) onload) (vm, NULL);
if (vers != JNI_VERSION_1_1 && vers != JNI_VERSION_1_2
&& vers != JNI_VERSION_1_4)
{
// FIXME: unload the library.
throw new UnsatisfiedLinkError (JvNewStringLatin1 ("unrecognized version from JNI_OnLoad"));
}
}
#else
throw new UnknownError
(JvNewStringLatin1 (do_search
? "Runtime.loadLibrary not implemented"
: "Runtime.load not implemented"));
#endif /* USE_LTDL */
}
jboolean
java::lang::Runtime::loadLibraryInternal (jstring lib)
{
JvSynchronize sync (this);
using namespace java::lang;
#ifdef USE_LTDL
jint len = _Jv_GetStringUTFLength (lib);
char buf[len + 1];
jsize total = JvGetStringUTFRegion (lib, 0, lib->length(), buf);
buf[total] = '\0';
// FIXME: make sure path is absolute.
lt_dlhandle h = lt_dlopenext (buf);
return h != NULL;
#else
return false;
#endif /* USE_LTDL */
}
void
java::lang::Runtime::init (void)
{
#ifdef USE_LTDL
lt_dlinit ();
// Make sure self is opened.
lt_dlopen (NULL);
#endif
}
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void
java::lang::Runtime::runFinalization (void)
{
gnu::gcj::runtime::FinalizerThread::finalizerReady ();
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}
jlong
java::lang::Runtime::totalMemory (void)
{
return _Jv_GCTotalMemory ();
}
jlong
java::lang::Runtime::maxMemory (void)
{
// We don't have a maximum. FIXME: we might if we ask the GC for
// one.
return Long::MAX_VALUE;
}
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void
java::lang::Runtime::traceInstructions (jboolean)
{
// Do nothing.
}
void
java::lang::Runtime::traceMethodCalls (jboolean)
{
// Do nothing.
}
#if ! defined (DEFAULT_FILE_ENCODING) && defined (HAVE_ICONV) \
&& defined (HAVE_NL_LANGINFO)
static char *
file_encoding ()
{
setlocale (LC_CTYPE, "");
char *e = nl_langinfo (CODESET);
if (e == NULL || *e == '\0')
e = "8859_1";
return e;
}
#define DEFAULT_FILE_ENCODING file_encoding ()
#endif
#ifndef DEFAULT_FILE_ENCODING
#define DEFAULT_FILE_ENCODING "8859_1"
#endif
static char *default_file_encoding = DEFAULT_FILE_ENCODING;
#if HAVE_GETPWUID_R
/* Use overload resolution to find out the signature of getpwuid_r. */
/* This is Posix getpwuid_r. */
template <typename T_uid, typename T_passwd, typename T_buf, typename T_len>
static inline int
getpwuid_adaptor(int (*getpwuid_r)(T_uid user_id, T_passwd *pwd_r,
T_buf *buf_r, T_len len_r,
T_passwd **pwd_entry_ptr),
uid_t user_id, struct passwd *pwd_r,
char *buf_r, size_t len_r, struct passwd **pwd_entry)
{
return getpwuid_r (user_id, pwd_r, buf_r, len_r, pwd_entry);
}
/* This is used on HPUX 10.20 */
template <typename T_uid, typename T_passwd, typename T_buf, typename T_len>
static inline int
getpwuid_adaptor(int (*getpwuid_r)(T_uid user_id, T_passwd *pwd_r,
T_buf *buf_r, T_len len_r),
uid_t user_id, struct passwd *pwd_r,
char *buf_r, size_t len_r, struct passwd **pwd_entry)
{
return getpwuid_r (user_id, pwd_r, buf_r, len_r);
}
/* This is used on IRIX 5.2. */
template <typename T_uid, typename T_passwd, typename T_buf, typename T_len>
static inline int
getpwuid_adaptor(T_passwd * (*getpwuid_r)(T_uid user_id, T_passwd *pwd_r,
T_buf *buf_r, T_len len_r),
uid_t user_id, struct passwd *pwd_r,
char *buf_r, size_t len_r, struct passwd **pwd_entry)
{
*pwd_entry = getpwuid_r (user_id, pwd_r, buf_r, len_r);
return (*pwd_entry == NULL) ? errno : 0;
}
#endif
void
java::lang::Runtime::insertSystemProperties (java::util::Properties *newprops)
{
// A convenience define.
#define SET(Prop,Val) \
newprops->put(JvNewStringLatin1 (Prop), JvNewStringLatin1 (Val))
// A mixture of the Java Product Versioning Specification
// (introduced in 1.2), and earlier versioning properties.
SET ("java.version", GCJVERSION);
SET ("java.vendor", "Free Software Foundation, Inc.");
SET ("java.vendor.url", "http://gcc.gnu.org/java/");
SET ("java.class.version", "46.0");
SET ("java.vm.specification.version", "1.0");
SET ("java.vm.specification.name", "Java(tm) Virtual Machine Specification");
SET ("java.vm.specification.vendor", "Sun Microsystems Inc.");
SET ("java.vm.version", __VERSION__);
SET ("java.vm.vendor", "Free Software Foundation, Inc.");
SET ("java.vm.name", "GNU libgcj");
SET ("java.specification.version", "1.3");
SET ("java.specification.name", "Java(tm) Platform API Specification");
SET ("java.specification.vendor", "Sun Microsystems Inc.");
char value[100];
#define NAME "GNU libgcj "
strcpy (value, NAME);
strncpy (value + sizeof (NAME) - 1, __VERSION__,
sizeof(value) - sizeof(NAME));
value[sizeof (value) - 1] = '\0';
jstring version = JvNewStringLatin1 (value);
newprops->put (JvNewStringLatin1 ("java.fullversion"), version);
newprops->put (JvNewStringLatin1 ("java.vm.info"), version);
// This definition is rather arbitrary: we choose $(prefix). In
// part we do this because most people specify only --prefix and
// nothing else when installing gcj. Plus, people are free to
// redefine `java.home' with `-D' if necessary.
SET ("java.home", PREFIX);
SET ("gnu.classpath.home", PREFIX);
// This is set to $(libdir) because we use this to find .security
// files at runtime.
char val2[sizeof ("file://") + sizeof (LIBDIR) + 1];
strcpy (val2, "file://");
strcat (val2, LIBDIR);
SET ("gnu.classpath.home.url", val2);
SET ("file.encoding", default_file_encoding);
#ifdef HAVE_UNAME
struct utsname u;
if (! uname (&u))
{
SET ("os.name", u.sysname);
SET ("os.arch", u.machine);
SET ("os.version", u.release);
}
else
{
SET ("os.name", "unknown");
SET ("os.arch", "unknown");
SET ("os.version", "unknown");
}
#endif /* HAVE_UNAME */
#ifndef NO_GETUID
#ifdef HAVE_PWD_H
uid_t user_id = getuid ();
struct passwd *pwd_entry;
#ifdef HAVE_GETPWUID_R
struct passwd pwd_r;
size_t len_r = 200;
char *buf_r = (char *) _Jv_AllocBytes (len_r);
while (buf_r != NULL)
{
int r = getpwuid_adaptor (getpwuid_r, user_id, &pwd_r,
buf_r, len_r, &pwd_entry);
if (r == 0)
break;
else if (r != ERANGE)
{
pwd_entry = NULL;
break;
}
len_r *= 2;
buf_r = (char *) _Jv_AllocBytes (len_r);
}
#else
pwd_entry = getpwuid (user_id);
#endif /* HAVE_GETPWUID_R */
if (pwd_entry != NULL)
{
SET ("user.name", pwd_entry->pw_name);
SET ("user.home", pwd_entry->pw_dir);
}
#endif /* HAVE_PWD_H */
#endif /* NO_GETUID */
#ifdef HAVE_GETCWD
#ifdef HAVE_UNISTD_H
/* Use getcwd to set "user.dir". */
int buflen = 250;
char *buffer = (char *) malloc (buflen);
while (buffer != NULL)
{
if (getcwd (buffer, buflen) != NULL)
{
SET ("user.dir", buffer);
break;
}
if (errno != ERANGE)
break;
buflen = 2 * buflen;
buffer = (char *) realloc (buffer, buflen);
}
if (buffer != NULL)
free (buffer);
#endif /* HAVE_UNISTD_H */
#endif /* HAVE_GETCWD */
// Set user locale properties based on setlocale()
#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
// We let the user choose the locale. However, since Java differs
// from POSIX, we arbitrarily pick LC_MESSAGES as determining the
// Java locale. We can't use LC_ALL because it might return a full
// list of all the settings. If we don't have LC_MESSAGES then we
// just default to `en_US'.
setlocale (LC_ALL, "");
char *locale = setlocale (LC_MESSAGES, "");
if (locale && strlen (locale) >= 2)
{
char buf[3];
buf[2] = '\0';
// copy the first two chars to user.language
strncpy (buf, locale, 2);
SET ("user.language", buf);
// if the next char is a '_', copy the two after that to user.region
locale += 2;
if (locale[0] == '_')
{
locale++;
strncpy (buf, locale, 2);
SET ("user.region", buf);
}
}
else
#endif /* HAVE_SETLOCALE and HAVE_LC_MESSAGES */
{
SET ("user.language", "en");
SET ("user.region", "US");
}
// Set some properties according to whatever was compiled in with
// `-D'.
for (int i = 0; _Jv_Compiler_Properties[i]; ++i)
{
const char *s, *p;
// Find the `='.
for (s = p = _Jv_Compiler_Properties[i]; *s && *s != '='; ++s)
;
jstring name = JvNewStringLatin1 (p, s - p);
jstring val = JvNewStringLatin1 (*s == '=' ? s + 1 : s);
newprops->put (name, val);
}
// Set the system properties from the user's environment.
#ifndef DISABLE_GETENV_PROPERTIES
if (_Jv_Environment_Properties)
{
size_t i = 0;
while (_Jv_Environment_Properties[i].key)
{
SET (_Jv_Environment_Properties[i].key,
_Jv_Environment_Properties[i].value);
i++;
}
}
#endif
if (_Jv_Jar_Class_Path)
newprops->put(JvNewStringLatin1 ("java.class.path"),
JvNewStringLatin1 (_Jv_Jar_Class_Path));
else
{
// FIXME: find libgcj.zip and append its path?
char *classpath = ::getenv("CLASSPATH");
jstring cp = newprops->getProperty (JvNewStringLatin1("java.class.path"));
java::lang::StringBuffer *sb = new java::lang::StringBuffer ();
if (classpath)
{
sb->append (JvNewStringLatin1 (classpath));
sb->append (_Jv_platform_path_separator);
}
if (cp != NULL)
sb->append (cp);
else
sb->append ((jchar) '.');
newprops->put(JvNewStringLatin1 ("java.class.path"),
sb->toString ());
}
// The path to libgcj's boot classes
SET ("sun.boot.class.path", BOOT_CLASS_PATH);
// The name used to invoke this process (argv[0] in C).
SET ("gnu.gcj.progname", _Jv_GetSafeArg (0));
// Allow platform specific settings and overrides.
_Jv_platform_initProperties (newprops);
// If java.library.path is set, tell libltdl so we search the new
// directories as well. FIXME: does this work properly on Windows?
String *path = newprops->getProperty(JvNewStringLatin1("java.library.path"));
if (path)
{
char *val = (char *) _Jv_Malloc (JvGetStringUTFLength (path) + 1);
jsize total = JvGetStringUTFRegion (path, 0, path->length(), val);
val[total] = '\0';
_Jv_SetDLLSearchPath (val);
_Jv_Free (val);
}
else
{
// Set a value for user code to see.
// FIXME: JDK sets this to the actual path used, including
// LD_LIBRARY_PATH, etc.
SET ("java.library.path", "");
}
}
java::lang::Process *
java::lang::Runtime::execInternal (jstringArray cmd,
jstringArray env,
java::io::File *dir)
{
return new java::lang::ConcreteProcess (cmd, env, dir);
}
jint
java::lang::Runtime::availableProcessors (void)
{
// FIXME: find the real value.
return 1;
}
jstring
java::lang::Runtime::nativeGetLibname (jstring pathname, jstring libname)
{
java::lang::StringBuffer *sb = new java::lang::StringBuffer ();
sb->append(pathname);
if (pathname->length() > 0)
sb->append (_Jv_platform_file_separator);
sb->append (JvNewStringLatin1 (_Jv_platform_solib_prefix));
sb->append(libname);
sb->append (JvNewStringLatin1 (_Jv_platform_solib_suffix));
return sb->toString();
}