mirror of git://gcc.gnu.org/git/gcc.git
324 lines
7.1 KiB
C++
324 lines
7.1 KiB
C++
// natRuntime.cc - Implementation of native side of Runtime class.
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/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#include <config.h>
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#include <platform.h>
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#include <stdlib.h>
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#include <gcj/cni.h>
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#include <jvm.h>
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#include <java-props.h>
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#include <java-stack.h>
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#include <java/lang/Long.h>
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#include <java/lang/Runtime.h>
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#include <java/lang/UnknownError.h>
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#include <java/lang/UnsatisfiedLinkError.h>
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#include <gnu/gcj/runtime/FinalizerThread.h>
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#include <java/io/File.h>
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#include <java/util/TimeZone.h>
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#include <java/lang/StringBuffer.h>
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#include <java/lang/Process.h>
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#include <java/lang/ClassLoader.h>
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// It is convenient and safe to simply include all of these.
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#include <java/lang/Win32Process.h>
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#include <java/lang/EcosProcess.h>
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#include <java/lang/PosixProcess.h>
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#include <jni.h>
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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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#include <errno.h>
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#ifdef HAVE_LOCALE_H
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#include <locale.h>
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#endif
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#ifdef HAVE_LANGINFO_H
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#include <langinfo.h>
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#endif
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#ifdef USE_LTDL
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#include <ltdl.h>
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/* FIXME: we don't always need this. The next libtool will let us use
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AC_LTDL_PREOPEN to see if we do. */
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extern const lt_dlsymlist lt_preloaded_symbols[1] = { { 0, 0 } };
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struct lookup_data
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{
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const char *symname;
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void *result;
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};
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static int
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find_symbol (lt_dlhandle handle, lt_ptr data)
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{
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lookup_data *ld = (lookup_data *) data;
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ld->result = lt_dlsym (handle, ld->symname);
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return ld->result != NULL;
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}
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void *
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_Jv_FindSymbolInExecutable (const char *symname)
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{
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lookup_data data;
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data.symname = symname;
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data.result = NULL;
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lt_dlforeach (find_symbol, (lt_ptr) &data);
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return data.result;
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}
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#else
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void *
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_Jv_FindSymbolInExecutable (const char *)
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{
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return NULL;
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}
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#endif /* USE_LTDL */
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void
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java::lang::Runtime::runFinalizationForExit ()
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{
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if (finalizeOnExit)
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_Jv_RunAllFinalizers ();
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}
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void
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java::lang::Runtime::exitInternal (jint status)
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{
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// Make status right for Unix. This is perhaps strange.
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if (status < 0 || status > 255)
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status = 255;
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::exit (status);
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}
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jlong
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java::lang::Runtime::freeMemory (void)
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{
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return _Jv_GCFreeMemory ();
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}
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void
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java::lang::Runtime::gc (void)
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{
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_Jv_RunGC ();
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}
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#ifdef USE_LTDL
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// List of names for JNI_OnLoad.
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static const char *onload_names[] = _Jv_platform_onload_names;
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#endif
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void
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java::lang::Runtime::_load (jstring path, jboolean do_search)
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{
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JvSynchronize sync (this);
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using namespace java::lang;
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#ifdef USE_LTDL
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jint len = _Jv_GetStringUTFLength (path);
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char buf[len + 1 + strlen (_Jv_platform_solib_prefix)
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+ strlen (_Jv_platform_solib_suffix)];
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int offset = 0;
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if (do_search)
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{
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strcpy (buf, _Jv_platform_solib_prefix);
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offset = strlen (_Jv_platform_solib_prefix);
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}
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jsize total = JvGetStringUTFRegion (path, 0, path->length(), &buf[offset]);
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buf[offset + total] = '\0';
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char *lib_name = buf;
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if (do_search)
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{
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ClassLoader *look = _Jv_StackTrace::GetFirstNonSystemClassLoader ();
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if (look != NULL)
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{
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// Don't include solib prefix in string passed to
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// findLibrary.
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jstring name = look->findLibrary(JvNewStringUTF(&buf[offset]));
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if (name != NULL)
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{
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len = _Jv_GetStringUTFLength (name);
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lib_name = (char *) _Jv_AllocBytes(len + 1);
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total = JvGetStringUTFRegion (name, 0,
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name->length(), lib_name);
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lib_name[total] = '\0';
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// Don't append suffixes any more; we have the full file
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// name.
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do_search = false;
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}
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}
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}
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lt_dlhandle h;
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// FIXME: make sure path is absolute.
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{
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// Synchronize on java.lang.Class. This is to protect the class chain from
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// concurrent modification by class registration calls which may be run
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// during the dlopen().
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JvSynchronize sync (&java::lang::Class::class$);
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h = do_search ? lt_dlopenext (lib_name) : lt_dlopen (lib_name);
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}
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if (h == NULL)
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{
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const char *msg = lt_dlerror ();
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jstring str = JvNewStringLatin1 (lib_name);
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str = str->concat (JvNewStringLatin1 (": "));
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str = str->concat (JvNewStringLatin1 (msg));
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throw new UnsatisfiedLinkError (str);
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}
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// Search for JNI_OnLoad function.
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void *onload = NULL;
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const char **name = onload_names;
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while (*name != NULL)
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{
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onload = lt_dlsym (h, *name);
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if (onload != NULL)
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break;
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++name;
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}
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if (onload != NULL)
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{
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JavaVM *vm = _Jv_GetJavaVM ();
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if (vm == NULL)
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{
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// FIXME: what?
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return;
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}
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// Push a new frame so that JNI_OnLoad will get the right class
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// loader if it calls FindClass.
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::java::lang::ClassLoader *loader
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= _Jv_StackTrace::GetFirstNonSystemClassLoader();
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JNIEnv *env = _Jv_GetJNIEnvNewFrameWithLoader (loader);
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jint vers = ((jint (JNICALL *) (JavaVM *, void *)) onload) (vm, NULL);
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_Jv_JNI_PopSystemFrame (env);
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if (vers != JNI_VERSION_1_1 && vers != JNI_VERSION_1_2
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&& vers != JNI_VERSION_1_4)
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{
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// FIXME: unload the library.
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throw new UnsatisfiedLinkError (JvNewStringLatin1 ("unrecognized version from JNI_OnLoad"));
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}
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}
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#else
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throw new UnknownError
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(JvNewStringLatin1 (do_search
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? "Runtime.loadLibrary not implemented"
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: "Runtime.load not implemented"));
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#endif /* USE_LTDL */
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}
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jboolean
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java::lang::Runtime::loadLibraryInternal (jstring lib)
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{
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JvSynchronize sync (this);
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using namespace java::lang;
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#ifdef USE_LTDL
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jint len = _Jv_GetStringUTFLength (lib);
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char buf[len + 1];
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jsize total = JvGetStringUTFRegion (lib, 0, lib->length(), buf);
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buf[total] = '\0';
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// FIXME: make sure path is absolute.
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lt_dlhandle h = lt_dlopenext (buf);
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return h != NULL;
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#else
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return false;
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#endif /* USE_LTDL */
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}
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void
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java::lang::Runtime::init (void)
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{
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#ifdef USE_LTDL
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lt_dlinit ();
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// Set module load path.
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lt_dlsetsearchpath (_Jv_Module_Load_Path);
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// Make sure self is opened.
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lt_dlopen (NULL);
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#endif
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}
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void
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java::lang::Runtime::runFinalization (void)
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{
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gnu::gcj::runtime::FinalizerThread::finalizerReady ();
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}
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jlong
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java::lang::Runtime::totalMemory (void)
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{
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return _Jv_GCTotalMemory ();
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}
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jlong
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java::lang::Runtime::maxMemory (void)
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{
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// We don't have a maximum. FIXME: we might if we ask the GC for
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// one.
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return Long::MAX_VALUE;
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}
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void
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java::lang::Runtime::traceInstructions (jboolean)
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{
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// Do nothing.
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}
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void
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java::lang::Runtime::traceMethodCalls (jboolean)
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{
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// Do nothing.
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}
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java::lang::Process *
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java::lang::Runtime::execInternal (jstringArray cmd,
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jstringArray env,
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java::io::File *dir)
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{
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return new _Jv_platform_process (cmd, env, dir, false);
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}
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jint
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java::lang::Runtime::availableProcessors (void)
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{
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// FIXME: find the real value.
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return 1;
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}
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jstring
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java::lang::Runtime::nativeGetLibname (jstring pathname, jstring libname)
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{
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java::lang::StringBuffer *sb = new java::lang::StringBuffer ();
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sb->append(pathname);
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if (pathname->length() > 0)
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sb->append (_Jv_platform_file_separator);
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sb->append (JvNewStringLatin1 (_Jv_platform_solib_prefix));
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sb->append(libname);
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sb->append (JvNewStringLatin1 (_Jv_platform_solib_suffix));
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return sb->toString();
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}
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