1 // natSharedLibLoader.cc - Implementation of SharedLibHelper native methods.
3 /* Copyright (C) 2001, 2003, 2004, 2005, 2006 Free Software Foundation
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
16 #include <execution.h>
18 #include <gnu/gcj/runtime/SharedLibHelper.h>
19 #include <java/io/IOException.h>
20 #include <java/lang/UnsupportedOperationException.h>
21 #include <java/lang/UnknownError.h>
23 // If we're using the Boehm GC, then we need this include to override dlopen.
25 // Set GC_DEBUG before including gc.h!
26 #ifdef LIBGCJ_GC_DEBUG
30 #endif /* HAVE_BOEHM_GC */
35 /* Only used during dlopen, while having a lock on Class.class. */
36 static java::lang::ClassLoader *curLoader;
37 static gnu::gcj::runtime::SharedLibHelper *curHelper;
39 typedef void (*ClassHookFunc) (jclass);
40 typedef void (*CoreHookFunc) (_Jv_core_chain *);
43 _Jv_sharedlib_register_hook (jclass cls)
45 cls->protectionDomain = curHelper->domain;
46 cls->loader = curLoader;
48 cls->engine = &_Jv_soleCompiledEngine;
49 curHelper->registerClass(cls->getName(), cls);
53 core_hook (_Jv_core_chain *chain)
55 chain->next = (_Jv_core_chain *) curHelper->core_chain;
56 curHelper->core_chain = (gnu::gcj::RawData *) chain;
62 CoreHookFunc saved_core;
65 saved = _Jv_RegisterClassHook;
66 saved_core = _Jv_RegisterCoreHook;
70 _Jv_RegisterClassHook = saved;
71 _Jv_RegisterCoreHook = saved_core;
78 gnu::gcj::runtime::SharedLibHelper::init(void)
81 char *lname = (char *) __builtin_alloca (JvGetStringUTFLength (baseName)
83 jsize total = JvGetStringUTFRegion (baseName, 0, baseName->length(), lname);
87 flags = RTLD_GLOBAL | RTLD_LAZY;
88 JvSynchronize dummy1(&java::lang::Class::class$);
89 SharedLibDummy dummy2;
92 _Jv_RegisterClassHook = _Jv_sharedlib_register_hook;
93 _Jv_RegisterCoreHook = core_hook;
94 void *h = dlopen(lname, flags);
97 const char *msg = dlerror();
98 throw new java::lang::UnknownError(JvNewStringLatin1(msg));
99 fprintf (stderr, "failed loading %s: %s\n", lname, msg);
101 handler = (gnu::gcj::RawData*) h;
104 = "shared library class loading is not supported on this platform";
105 throw new java::lang::UnsupportedOperationException(JvNewStringLatin1(msg));
110 gnu::gcj::runtime::SharedLibHelper::hasResource (jstring name)
113 _Jv_core_chain *node = _Jv_FindCore ((_Jv_core_chain *) core_chain, name);
121 gnu::gcj::runtime::SharedLibHelper::findCore (jstring name)
124 extern gnu::gcj::Core *_Jv_create_core (_Jv_core_chain *node, jstring name);
126 return _Jv_create_core ((_Jv_core_chain *) core_chain, name);
133 gnu::gcj::runtime::SharedLibHelper::finalize()
135 _Jv_FreeCoreChain ((_Jv_core_chain *) core_chain);
143 gnu::gcj::runtime::SharedLibHelper::ensureSupersLinked(jclass k)
145 _Jv_Linker::wait_for_state (k, JV_STATE_LOADING);