4cf0d20fce
2003-01-14 Andrew Haley <aph@redhat.com>
* java/lang/natRuntime.cc (_load): StackTrace access needs to be
in a try block.
From-SVN: r61293
659 lines
16 KiB
C++
659 lines
16 KiB
C++
// natRuntime.cc - Implementation of native side of Runtime class.
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/* Copyright (C) 1998, 1999, 2000, 2001, 2002 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 <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/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/FileDeleter.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/Properties.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/ConcreteProcess.h>
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#include <java/lang/ClassLoader.h>
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#include <gnu/gcj/runtime/StackTrace.h>
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#include <java/lang/ArrayIndexOutOfBoundsException.h>
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#include <jni.h>
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#include "platform.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_UNAME
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#include <sys/utsname.h>
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#endif
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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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// We keep track of all the libraries loaded by this application. For
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// now we use them to look up symbols for JNI. `libraries_size' holds
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// the total size of the buffer. `libraries_count' is the number of
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// items which are in use.
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static int libraries_size;
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static int libraries_count;
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static lt_dlhandle *libraries;
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static void
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add_library (lt_dlhandle lib)
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{
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if (libraries_count == libraries_size)
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{
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int ns = libraries_size * 2;
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if (ns == 0)
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ns = 10;
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lt_dlhandle *n = (lt_dlhandle *) _Jv_Malloc (ns * sizeof (lt_dlhandle));
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if (libraries)
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{
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memcpy (n, libraries, libraries_size * sizeof (lt_dlhandle));
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_Jv_Free (libraries);
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}
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libraries = n;
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libraries_size = ns;
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for (int i = libraries_count; i < libraries_size; ++i)
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libraries[i] = NULL;
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}
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libraries[libraries_count++] = lib;
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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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for (int i = 0; i < libraries_count; ++i)
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{
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void *r = lt_dlsym (libraries[i], symname);
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if (r)
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return r;
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}
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return NULL;
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}
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void
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_Jv_SetDLLSearchPath (const char *path)
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{
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lt_dlsetsearchpath (path);
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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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void
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_Jv_SetDLLSearchPath (const char *)
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{
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// Nothing.
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}
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#endif /* USE_LTDL */
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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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if (finalizeOnExit)
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_Jv_RunAllFinalizers ();
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// Delete all files registered with File.deleteOnExit()
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gnu::gcj::runtime::FileDeleter::deleteOnExitNow ();
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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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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 *sys = ClassLoader::getSystemClassLoader();
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ClassLoader *look = NULL;
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gnu::gcj::runtime::StackTrace *t = new gnu::gcj::runtime::StackTrace(10);
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try
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{
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for (int i = 0; i < 10; ++i)
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{
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jclass klass = t->classAt(i);
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if (klass != NULL)
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{
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ClassLoader *loader = klass->getClassLoaderInternal();
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if (loader != NULL && loader != sys)
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{
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look = loader;
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break;
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}
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}
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}
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}
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catch (::java::lang::ArrayIndexOutOfBoundsException *e)
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{
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}
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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 = path->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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add_library (h);
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void *onload = lt_dlsym (h, "JNI_OnLoad");
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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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jint vers = ((jint (*) (JavaVM *, void *)) onload) (vm, NULL);
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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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if (h != NULL)
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add_library (h);
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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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lt_dlhandle self = lt_dlopen (NULL);
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if (self != NULL)
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add_library (self);
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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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#if ! defined (DEFAULT_FILE_ENCODING) && defined (HAVE_ICONV) \
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&& defined (HAVE_NL_LANGINFO)
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static char *
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file_encoding ()
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{
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setlocale (LC_CTYPE, "");
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char *e = nl_langinfo (CODESET);
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if (e == NULL || *e == '\0')
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e = "8859_1";
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return e;
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}
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#define DEFAULT_FILE_ENCODING file_encoding ()
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#endif
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#ifndef DEFAULT_FILE_ENCODING
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#define DEFAULT_FILE_ENCODING "8859_1"
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#endif
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static char *default_file_encoding = DEFAULT_FILE_ENCODING;
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#if HAVE_GETPWUID_R
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/* Use overload resolution to find out the signature of getpwuid_r. */
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/* This is Posix getpwuid_r. */
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template <typename T_uid, typename T_passwd, typename T_buf, typename T_len>
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static inline int
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getpwuid_adaptor(int (*getpwuid_r)(T_uid user_id, T_passwd *pwd_r,
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T_buf *buf_r, T_len len_r,
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T_passwd **pwd_entry_ptr),
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uid_t user_id, struct passwd *pwd_r,
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char *buf_r, size_t len_r, struct passwd **pwd_entry)
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{
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return getpwuid_r (user_id, pwd_r, buf_r, len_r, pwd_entry);
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}
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/* This is used on HPUX 10.20 */
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template <typename T_uid, typename T_passwd, typename T_buf, typename T_len>
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static inline int
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getpwuid_adaptor(int (*getpwuid_r)(T_uid user_id, T_passwd *pwd_r,
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T_buf *buf_r, T_len len_r),
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uid_t user_id, struct passwd *pwd_r,
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char *buf_r, size_t len_r, struct passwd **pwd_entry)
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{
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return getpwuid_r (user_id, pwd_r, buf_r, len_r);
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}
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/* This is used on IRIX 5.2. */
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template <typename T_uid, typename T_passwd, typename T_buf, typename T_len>
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static inline int
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getpwuid_adaptor(T_passwd * (*getpwuid_r)(T_uid user_id, T_passwd *pwd_r,
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T_buf *buf_r, T_len len_r),
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uid_t user_id, struct passwd *pwd_r,
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char *buf_r, size_t len_r, struct passwd **pwd_entry)
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{
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*pwd_entry = getpwuid_r (user_id, pwd_r, buf_r, len_r);
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return (*pwd_entry == NULL) ? errno : 0;
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}
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#endif
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void
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java::lang::Runtime::insertSystemProperties (java::util::Properties *newprops)
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{
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// A convenience define.
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#define SET(Prop,Val) \
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newprops->put(JvNewStringLatin1 (Prop), JvNewStringLatin1 (Val))
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// A mixture of the Java Product Versioning Specification
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// (introduced in 1.2), and earlier versioning properties.
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SET ("java.version", GCJVERSION);
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SET ("java.vendor", "Free Software Foundation, Inc.");
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SET ("java.vendor.url", "http://gcc.gnu.org/java/");
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SET ("java.class.version", "46.0");
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SET ("java.vm.specification.version", "1.0");
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SET ("java.vm.specification.name", "Java(tm) Virtual Machine Specification");
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SET ("java.vm.specification.vendor", "Sun Microsystems Inc.");
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SET ("java.vm.version", __VERSION__);
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SET ("java.vm.vendor", "Free Software Foundation, Inc.");
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SET ("java.vm.name", "GNU libgcj");
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SET ("java.specification.version", "1.3");
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SET ("java.specification.name", "Java(tm) Platform API Specification");
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SET ("java.specification.vendor", "Sun Microsystems Inc.");
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char value[100];
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#define NAME "GNU libgcj "
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strcpy (value, NAME);
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strncpy (value + sizeof (NAME) - 1, __VERSION__,
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sizeof(value) - sizeof(NAME));
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value[sizeof (value) - 1] = '\0';
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jstring version = JvNewStringLatin1 (value);
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newprops->put (JvNewStringLatin1 ("java.fullversion"), version);
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newprops->put (JvNewStringLatin1 ("java.vm.info"), version);
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// This definition is rather arbitrary: we choose $(prefix). In
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// part we do this because most people specify only --prefix and
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// nothing else when installing gcj. Plus, people are free to
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// redefine `java.home' with `-D' if necessary.
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SET ("java.home", PREFIX);
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SET ("gnu.classpath.home", PREFIX);
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SET ("file.encoding", default_file_encoding);
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#ifdef HAVE_UNAME
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struct utsname u;
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if (! uname (&u))
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{
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SET ("os.name", u.sysname);
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SET ("os.arch", u.machine);
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SET ("os.version", u.release);
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}
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else
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{
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SET ("os.name", "unknown");
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SET ("os.arch", "unknown");
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SET ("os.version", "unknown");
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}
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#endif /* HAVE_UNAME */
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#ifndef NO_GETUID
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#ifdef HAVE_PWD_H
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uid_t user_id = getuid ();
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struct passwd *pwd_entry;
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#ifdef HAVE_GETPWUID_R
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struct passwd pwd_r;
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size_t len_r = 200;
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char *buf_r = (char *) _Jv_AllocBytes (len_r);
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while (buf_r != NULL)
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{
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int r = getpwuid_adaptor (getpwuid_r, user_id, &pwd_r,
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buf_r, len_r, &pwd_entry);
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if (r == 0)
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break;
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else if (r != ERANGE)
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{
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pwd_entry = NULL;
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break;
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}
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len_r *= 2;
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buf_r = (char *) _Jv_AllocBytes (len_r);
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}
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#else
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pwd_entry = getpwuid (user_id);
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#endif /* HAVE_GETPWUID_R */
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if (pwd_entry != NULL)
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{
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SET ("user.name", pwd_entry->pw_name);
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SET ("user.home", pwd_entry->pw_dir);
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}
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#endif /* HAVE_PWD_H */
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#endif /* NO_GETUID */
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#ifdef HAVE_GETCWD
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#ifdef HAVE_UNISTD_H
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/* Use getcwd to set "user.dir". */
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int buflen = 250;
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char *buffer = (char *) malloc (buflen);
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while (buffer != NULL)
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{
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if (getcwd (buffer, buflen) != NULL)
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{
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SET ("user.dir", buffer);
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break;
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}
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if (errno != ERANGE)
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break;
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buflen = 2 * buflen;
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buffer = (char *) realloc (buffer, buflen);
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}
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if (buffer != NULL)
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free (buffer);
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#endif /* HAVE_UNISTD_H */
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#endif /* HAVE_GETCWD */
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// Set user locale properties based on setlocale()
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#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
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// We let the user choose the locale. However, since Java differs
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// from POSIX, we arbitrarily pick LC_MESSAGES as determining the
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// Java locale. We can't use LC_ALL because it might return a full
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// list of all the settings. If we don't have LC_MESSAGES then we
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// just default to `en_US'.
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setlocale (LC_ALL, "");
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char *locale = setlocale (LC_MESSAGES, "");
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if (locale && strlen (locale) >= 2)
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{
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char buf[3];
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buf[2] = '\0';
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// copy the first two chars to user.language
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strncpy (buf, locale, 2);
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SET ("user.language", buf);
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// if the next char is a '_', copy the two after that to user.region
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locale += 2;
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if (locale[0] == '_')
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{
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locale++;
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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));
|
||
#ifdef WIN32
|
||
sb->append ((jchar) ';');
|
||
#else
|
||
sb->append ((jchar) ':');
|
||
#endif
|
||
}
|
||
if (cp != NULL)
|
||
sb->append (cp);
|
||
else
|
||
sb->append ((jchar) '.');
|
||
|
||
newprops->put(JvNewStringLatin1 ("java.class.path"),
|
||
sb->toString ());
|
||
}
|
||
|
||
// The name used to invoke this process (argv[0] in C).
|
||
SET ("gnu.gcj.progname", _Jv_ThisExecutable());
|
||
|
||
// 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)
|
||
{
|
||
// FIXME: use platform function here.
|
||
#ifdef WIN32
|
||
sb->append ((jchar) '\\');
|
||
#else
|
||
sb->append ((jchar) '/');
|
||
#endif
|
||
}
|
||
|
||
sb->append (JvNewStringLatin1 (_Jv_platform_solib_prefix));
|
||
sb->append(libname);
|
||
sb->append (JvNewStringLatin1 (_Jv_platform_solib_suffix));
|
||
|
||
return sb->toString();
|
||
}
|