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ee9dd372 TT |
1 | // boehm.cc - interface between libjava and Boehm GC. |
2 | ||
3610e0d5 | 3 | /* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation |
ee9dd372 TT |
4 | |
5 | This file is part of libgcj. | |
6 | ||
7 | This software is copyrighted work licensed under the terms of the | |
8 | Libgcj License. Please consult the file "LIBGCJ_LICENSE" for | |
9 | details. */ | |
10 | ||
11 | #include <config.h> | |
12 | ||
13 | #include <stdio.h> | |
14 | ||
ee9dd372 | 15 | #include <jvm.h> |
27e934d8 TT |
16 | #include <gcj/cni.h> |
17 | ||
18 | #include <java/lang/Class.h> | |
a52dee2f | 19 | #include <java/lang/reflect/Modifier.h> |
58eb6e7c | 20 | #include <java-interp.h> |
ee9dd372 | 21 | |
657ac766 TT |
22 | // More nastiness: the GC wants to define TRUE and FALSE. We don't |
23 | // need the Java definitions (themselves a hack), so we undefine them. | |
24 | #undef TRUE | |
25 | #undef FALSE | |
26 | ||
ee9dd372 TT |
27 | extern "C" |
28 | { | |
1f4eb17d BM |
29 | #include <private/gc_priv.h> |
30 | #include <private/gc_pmark.h> | |
31 | #include <gc_gcj.h> | |
ee9dd372 TT |
32 | |
33 | // These aren't declared in any Boehm GC header. | |
34 | void GC_finalize_all (void); | |
35 | ptr_t GC_debug_generic_malloc (size_t size, int k, GC_EXTRA_PARAMS); | |
36 | }; | |
37 | ||
38 | // FIXME: this should probably be defined in some GC header. | |
39 | #ifdef GC_DEBUG | |
40 | # define GC_GENERIC_MALLOC(Size, Type) \ | |
41 | GC_debug_generic_malloc (Size, Type, GC_EXTRAS) | |
42 | #else | |
43 | # define GC_GENERIC_MALLOC(Size, Type) GC_generic_malloc (Size, Type) | |
44 | #endif | |
45 | ||
46 | // We must check for plausibility ourselves. | |
47 | #define MAYBE_MARK(Obj, Top, Limit, Source, Exit) \ | |
48 | if ((ptr_t) (Obj) >= GC_least_plausible_heap_addr \ | |
49 | && (ptr_t) (Obj) <= GC_greatest_plausible_heap_addr) \ | |
50 | PUSH_CONTENTS (Obj, Top, Limit, Source, Exit) | |
51 | ||
ee9dd372 TT |
52 | \f |
53 | ||
54 | // Nonzero if this module has been initialized. | |
55 | static int initialized = 0; | |
56 | ||
bf3b8e42 | 57 | #if 0 |
ee9dd372 TT |
58 | // `kind' index used when allocating Java objects. |
59 | static int obj_kind_x; | |
60 | ||
ee9dd372 TT |
61 | // Freelist used for Java objects. |
62 | static ptr_t *obj_free_list; | |
bf3b8e42 HB |
63 | #endif /* 0 */ |
64 | ||
65 | // `kind' index used when allocating Java arrays. | |
66 | static int array_kind_x; | |
ee9dd372 TT |
67 | |
68 | // Freelist used for Java arrays. | |
69 | static ptr_t *array_free_list; | |
70 | ||
54c2f04b AG |
71 | // Lock used to protect access to Boehm's GC_enable/GC_disable functions. |
72 | static _Jv_Mutex_t disable_gc_mutex; | |
73 | ||
ee9dd372 TT |
74 | \f |
75 | ||
76 | // This is called by the GC during the mark phase. It marks a Java | |
77 | // object. We use `void *' arguments and return, and not what the | |
78 | // Boehm GC wants, to avoid pollution in our headers. | |
79 | void * | |
bf3b8e42 | 80 | _Jv_MarkObj (void *addr, void *msp, void *msl, void * /* env */) |
ee9dd372 TT |
81 | { |
82 | mse *mark_stack_ptr = (mse *) msp; | |
83 | mse *mark_stack_limit = (mse *) msl; | |
84 | jobject obj = (jobject) addr; | |
85 | ||
bf3b8e42 HB |
86 | // FIXME: if env is 1, this object was allocated through the debug |
87 | // interface, and addr points to the beginning of the debug header. | |
88 | // In that case, we should really add the size of the header to addr. | |
89 | ||
ee9dd372 | 90 | _Jv_VTable *dt = *(_Jv_VTable **) addr; |
bf3b8e42 HB |
91 | // The object might not yet have its vtable set, or it might |
92 | // really be an object on the freelist. In either case, the vtable slot | |
93 | // will either be 0, or it will point to a cleared object. | |
94 | // This assumes Java objects have size at least 3 words, | |
95 | // including the header. But this should remain true, since this | |
96 | // should only be used with debugging allocation or with large objects. | |
97 | if (__builtin_expect (! dt || !(dt -> get_finalizer()), false)) | |
ee9dd372 TT |
98 | return mark_stack_ptr; |
99 | jclass klass = dt->clas; | |
3610e0d5 | 100 | ptr_t p; |
ee9dd372 | 101 | |
3610e0d5 TT |
102 | # ifndef JV_HASH_SYNCHRONIZATION |
103 | // Every object has a sync_info pointer. | |
104 | p = (ptr_t) obj->sync_info; | |
105 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, obj, o1label); | |
106 | # endif | |
ee9dd372 | 107 | // Mark the object's class. |
4824d1bb BM |
108 | p = (ptr_t) klass; |
109 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, obj, o2label); | |
ee9dd372 | 110 | |
1d336a09 | 111 | if (__builtin_expect (klass == &java::lang::Class::class$, false)) |
ee9dd372 | 112 | { |
bf3b8e42 HB |
113 | // Currently we allocate some of the memory referenced from class objects |
114 | // as pointerfree memory, and then mark it more intelligently here. | |
115 | // We ensure that the ClassClass mark descriptor forces invocation of | |
116 | // this procedure. | |
117 | // Correctness of this is subtle, but it looks OK to me for now. For the incremental | |
118 | // collector, we need to make sure that the class object is written whenever | |
119 | // any of the subobjects are altered and may need rescanning. This may be tricky | |
120 | // during construction, and this may not be the right way to do this with | |
121 | // incremental collection. | |
122 | // If we overflow the mark stack, we will rescan the class object, so we should | |
123 | // be OK. The same applies if we redo the mark phase because win32 unmapped part | |
124 | // of our root set. - HB | |
ee9dd372 TT |
125 | jclass c = (jclass) addr; |
126 | ||
4824d1bb BM |
127 | p = (ptr_t) c->name; |
128 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c3label); | |
129 | p = (ptr_t) c->superclass; | |
130 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c4label); | |
ee9dd372 TT |
131 | for (int i = 0; i < c->constants.size; ++i) |
132 | { | |
7941ceab | 133 | /* FIXME: We could make this more precise by using the tags -KKT */ |
4824d1bb BM |
134 | p = (ptr_t) c->constants.data[i].p; |
135 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c5label); | |
ee9dd372 TT |
136 | } |
137 | ||
58eb6e7c AG |
138 | #ifdef INTERPRETER |
139 | if (_Jv_IsInterpretedClass (c)) | |
140 | { | |
4824d1bb BM |
141 | p = (ptr_t) c->constants.tags; |
142 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c5alabel); | |
143 | p = (ptr_t) c->constants.data; | |
144 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c5blabel); | |
bf3b8e42 HB |
145 | p = (ptr_t) c->vtable; |
146 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c5clabel); | |
58eb6e7c AG |
147 | } |
148 | #endif | |
149 | ||
ee9dd372 TT |
150 | // If the class is an array, then the methods field holds a |
151 | // pointer to the element class. If the class is primitive, | |
152 | // then the methods field holds a pointer to the array class. | |
4824d1bb BM |
153 | p = (ptr_t) c->methods; |
154 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c6label); | |
ee9dd372 | 155 | |
58eb6e7c | 156 | |
ee9dd372 TT |
157 | if (! c->isArray() && ! c->isPrimitive()) |
158 | { | |
159 | // Scan each method in the cases where `methods' really | |
160 | // points to a methods structure. | |
161 | for (int i = 0; i < c->method_count; ++i) | |
162 | { | |
4824d1bb BM |
163 | p = (ptr_t) c->methods[i].name; |
164 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, | |
ee9dd372 | 165 | cm1label); |
4824d1bb BM |
166 | p = (ptr_t) c->methods[i].signature; |
167 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, | |
ee9dd372 | 168 | cm2label); |
58eb6e7c | 169 | |
ee9dd372 | 170 | // FIXME: `ncode' entry? |
58eb6e7c AG |
171 | |
172 | #ifdef INTERPRETER | |
173 | // The interpreter installs a heap-allocated | |
174 | // trampoline here, so we'll mark it. | |
175 | if (_Jv_IsInterpretedClass (c)) | |
176 | { | |
4824d1bb BM |
177 | p = (ptr_t) c->methods[i].ncode; |
178 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, | |
58eb6e7c AG |
179 | cm3label); |
180 | } | |
181 | #endif | |
ee9dd372 TT |
182 | } |
183 | } | |
184 | ||
185 | // Mark all the fields. | |
4824d1bb BM |
186 | p = (ptr_t) c->fields; |
187 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c8label); | |
ee9dd372 TT |
188 | for (int i = 0; i < c->field_count; ++i) |
189 | { | |
58eb6e7c AG |
190 | _Jv_Field* field = &c->fields[i]; |
191 | ||
ee9dd372 | 192 | #ifndef COMPACT_FIELDS |
4824d1bb BM |
193 | p = (ptr_t) field->name; |
194 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c8alabel); | |
ee9dd372 | 195 | #endif |
4824d1bb BM |
196 | p = (ptr_t) field->type; |
197 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c8blabel); | |
58eb6e7c AG |
198 | |
199 | // For the interpreter, we also need to mark the memory | |
200 | // containing static members | |
a52dee2f | 201 | if ((field->flags & java::lang::reflect::Modifier::STATIC)) |
58eb6e7c | 202 | { |
4824d1bb BM |
203 | p = (ptr_t) field->u.addr; |
204 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c8clabel); | |
58eb6e7c AG |
205 | |
206 | // also, if the static member is a reference, | |
207 | // mark also the value pointed to. We check for isResolved | |
208 | // since marking can happen before memory is allocated for | |
209 | // static members. | |
210 | if (JvFieldIsRef (field) && field->isResolved()) | |
211 | { | |
212 | jobject val = *(jobject*) field->u.addr; | |
4824d1bb BM |
213 | p = (ptr_t) val; |
214 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, | |
58eb6e7c AG |
215 | c, c8elabel); |
216 | } | |
217 | } | |
ee9dd372 TT |
218 | } |
219 | ||
4824d1bb BM |
220 | p = (ptr_t) c->vtable; |
221 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, c9label); | |
222 | p = (ptr_t) c->interfaces; | |
223 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, cAlabel); | |
ee9dd372 TT |
224 | for (int i = 0; i < c->interface_count; ++i) |
225 | { | |
4824d1bb BM |
226 | p = (ptr_t) c->interfaces[i]; |
227 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, cClabel); | |
ee9dd372 | 228 | } |
4824d1bb BM |
229 | p = (ptr_t) c->loader; |
230 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, cBlabel); | |
5bb11b2e BM |
231 | p = (ptr_t) c->arrayclass; |
232 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, cDlabel); | |
58eb6e7c AG |
233 | |
234 | #ifdef INTERPRETER | |
235 | if (_Jv_IsInterpretedClass (c)) | |
236 | { | |
237 | _Jv_InterpClass* ic = (_Jv_InterpClass*)c; | |
238 | ||
4824d1bb BM |
239 | p = (ptr_t) ic->interpreted_methods; |
240 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, ic, cElabel); | |
58eb6e7c AG |
241 | |
242 | for (int i = 0; i < c->method_count; i++) | |
243 | { | |
4824d1bb BM |
244 | p = (ptr_t) ic->interpreted_methods[i]; |
245 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, ic, \ | |
58eb6e7c AG |
246 | cFlabel); |
247 | } | |
248 | ||
4824d1bb BM |
249 | p = (ptr_t) ic->field_initializers; |
250 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, ic, cGlabel); | |
58eb6e7c AG |
251 | |
252 | } | |
253 | #endif | |
254 | ||
ee9dd372 TT |
255 | } |
256 | else | |
257 | { | |
258 | // NOTE: each class only holds information about the class | |
259 | // itself. So we must do the marking for the entire inheritance | |
260 | // tree in order to mark all fields. FIXME: what about | |
261 | // interfaces? We skip Object here, because Object only has a | |
262 | // sync_info, and we handled that earlier. | |
263 | // Note: occasionally `klass' can be null. For instance, this | |
264 | // can happen if a GC occurs between the point where an object | |
265 | // is allocated and where the vtbl slot is set. | |
1d336a09 | 266 | while (klass && klass != &java::lang::Object::class$) |
ee9dd372 TT |
267 | { |
268 | jfieldID field = JvGetFirstInstanceField (klass); | |
269 | jint max = JvNumInstanceFields (klass); | |
270 | ||
271 | for (int i = 0; i < max; ++i) | |
272 | { | |
273 | if (JvFieldIsRef (field)) | |
274 | { | |
275 | jobject val = JvGetObjectField (obj, field); | |
4824d1bb BM |
276 | p = (ptr_t) val; |
277 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, | |
ee9dd372 TT |
278 | obj, elabel); |
279 | } | |
8a922095 | 280 | field = field->getNextField (); |
ee9dd372 TT |
281 | } |
282 | klass = klass->getSuperclass(); | |
283 | } | |
284 | } | |
285 | ||
286 | return mark_stack_ptr; | |
287 | } | |
288 | ||
289 | // This is called by the GC during the mark phase. It marks a Java | |
290 | // array (of objects). We use `void *' arguments and return, and not | |
291 | // what the Boehm GC wants, to avoid pollution in our headers. | |
292 | void * | |
293 | _Jv_MarkArray (void *addr, void *msp, void *msl, void * /*env*/) | |
294 | { | |
295 | mse *mark_stack_ptr = (mse *) msp; | |
296 | mse *mark_stack_limit = (mse *) msl; | |
297 | jobjectArray array = (jobjectArray) addr; | |
298 | ||
299 | _Jv_VTable *dt = *(_Jv_VTable **) addr; | |
bf3b8e42 HB |
300 | // Assumes size >= 3 words. That's currently true since arrays have |
301 | // a vtable, sync pointer, and size. If the sync pointer goes away, | |
302 | // we may need to round up the size. | |
303 | if (__builtin_expect (! dt || !(dt -> get_finalizer()), false)) | |
ee9dd372 TT |
304 | return mark_stack_ptr; |
305 | jclass klass = dt->clas; | |
3610e0d5 | 306 | ptr_t p; |
ee9dd372 | 307 | |
3610e0d5 TT |
308 | # ifndef JV_HASH_SYNCHRONIZATION |
309 | // Every object has a sync_info pointer. | |
310 | p = (ptr_t) array->sync_info; | |
311 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, array, e1label); | |
312 | # endif | |
ee9dd372 | 313 | // Mark the object's class. |
4824d1bb BM |
314 | p = (ptr_t) klass; |
315 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, obj, o2label); | |
ee9dd372 TT |
316 | |
317 | for (int i = 0; i < JvGetArrayLength (array); ++i) | |
318 | { | |
319 | jobject obj = elements (array)[i]; | |
4824d1bb BM |
320 | p = (ptr_t) obj; |
321 | MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, array, e2label); | |
ee9dd372 TT |
322 | } |
323 | ||
324 | return mark_stack_ptr; | |
325 | } | |
326 | ||
bf3b8e42 HB |
327 | // Return GC descriptor for interpreted class |
328 | #ifdef INTERPRETER | |
329 | ||
330 | // We assume that the gcj mark proc has index 0. This is a dubious assumption, | |
331 | // since another one could be registered first. But the compiler also | |
332 | // knows this, so in that case everything else will break, too. | |
1f4eb17d | 333 | #define GCJ_DEFAULT_DESCR GC_MAKE_PROC(GC_GCJ_RESERVED_MARK_PROC_INDEX,0) |
bf3b8e42 | 334 | void * |
3610e0d5 | 335 | _Jv_BuildGCDescr(jclass) |
bf3b8e42 HB |
336 | { |
337 | /* FIXME: We should really look at the class and build the descriptor. */ | |
338 | return (void *)(GCJ_DEFAULT_DESCR); | |
339 | } | |
340 | #endif | |
341 | ||
3610e0d5 | 342 | // Allocate some space that is known to be pointer-free. |
ee9dd372 | 343 | void * |
3610e0d5 | 344 | _Jv_AllocBytes (jsize size) |
ee9dd372 | 345 | { |
3610e0d5 TT |
346 | void *r = GC_MALLOC_ATOMIC (size); |
347 | // We have to explicitly zero memory here, as the GC doesn't | |
348 | // guarantee that PTRFREE allocations are zeroed. Note that we | |
349 | // don't have to do this for other allocation types because we set | |
350 | // the `ok_init' flag in the type descriptor. | |
351 | memset (r, 0, size); | |
352 | return r; | |
ee9dd372 TT |
353 | } |
354 | ||
bf3b8e42 HB |
355 | // Allocate space for a new Java array. |
356 | // Used only for arrays of objects. | |
ee9dd372 | 357 | void * |
bf3b8e42 | 358 | _Jv_AllocArray (jsize size, jclass klass) |
ee9dd372 | 359 | { |
bf3b8e42 HB |
360 | void *obj; |
361 | const jsize min_heap_addr = 16*1024; | |
362 | // A heuristic. If size is less than this value, the size | |
363 | // stored in the array can't possibly be misinterpreted as | |
364 | // a pointer. Thus we lose nothing by scanning the object | |
365 | // completely conservatively, since no misidentification can | |
366 | // take place. | |
367 | ||
368 | #ifdef GC_DEBUG | |
369 | // There isn't much to lose by scanning this conservatively. | |
370 | // If we didn't, the mark proc would have to understand that | |
371 | // it needed to skip the header. | |
372 | obj = GC_MALLOC(size); | |
373 | #else | |
374 | if (size < min_heap_addr) | |
375 | obj = GC_MALLOC(size); | |
376 | else | |
377 | obj = GC_GENERIC_MALLOC (size, array_kind_x); | |
378 | #endif | |
379 | *((_Jv_VTable **) obj) = klass->vtable; | |
380 | return obj; | |
ee9dd372 TT |
381 | } |
382 | ||
ee9dd372 TT |
383 | static void |
384 | call_finalizer (GC_PTR obj, GC_PTR client_data) | |
385 | { | |
386 | _Jv_FinalizerFunc *fn = (_Jv_FinalizerFunc *) client_data; | |
387 | jobject jobj = (jobject) obj; | |
388 | ||
389 | (*fn) (jobj); | |
390 | } | |
391 | ||
392 | void | |
393 | _Jv_RegisterFinalizer (void *object, _Jv_FinalizerFunc *meth) | |
394 | { | |
25fef12b | 395 | GC_REGISTER_FINALIZER_NO_ORDER (object, call_finalizer, (GC_PTR) meth, |
ee9dd372 TT |
396 | NULL, NULL); |
397 | } | |
398 | ||
399 | void | |
400 | _Jv_RunFinalizers (void) | |
401 | { | |
402 | GC_invoke_finalizers (); | |
403 | } | |
404 | ||
405 | void | |
406 | _Jv_RunAllFinalizers (void) | |
407 | { | |
408 | GC_finalize_all (); | |
409 | } | |
410 | ||
411 | void | |
412 | _Jv_RunGC (void) | |
413 | { | |
414 | GC_gcollect (); | |
415 | } | |
416 | ||
417 | long | |
418 | _Jv_GCTotalMemory (void) | |
419 | { | |
420 | return GC_get_heap_size (); | |
421 | } | |
422 | ||
ee9dd372 TT |
423 | long |
424 | _Jv_GCFreeMemory (void) | |
425 | { | |
e40217a7 | 426 | return GC_get_free_bytes (); |
ee9dd372 TT |
427 | } |
428 | ||
b8c3c4f0 TT |
429 | void |
430 | _Jv_GCSetInitialHeapSize (size_t size) | |
431 | { | |
432 | size_t current = GC_get_heap_size (); | |
433 | if (size > current) | |
3948f9d0 | 434 | GC_expand_hp (size - current); |
b8c3c4f0 TT |
435 | } |
436 | ||
437 | void | |
438 | _Jv_GCSetMaximumHeapSize (size_t size) | |
439 | { | |
440 | GC_set_max_heap_size ((GC_word) size); | |
441 | } | |
442 | ||
54c2f04b AG |
443 | // From boehm's misc.c |
444 | extern "C" void GC_enable(); | |
445 | extern "C" void GC_disable(); | |
446 | ||
447 | void | |
448 | _Jv_DisableGC (void) | |
449 | { | |
450 | _Jv_MutexLock (&disable_gc_mutex); | |
451 | GC_disable(); | |
452 | _Jv_MutexUnlock (&disable_gc_mutex); | |
453 | } | |
454 | ||
455 | void | |
456 | _Jv_EnableGC (void) | |
457 | { | |
458 | _Jv_MutexLock (&disable_gc_mutex); | |
459 | GC_enable(); | |
460 | _Jv_MutexUnlock (&disable_gc_mutex); | |
461 | } | |
462 | ||
3610e0d5 TT |
463 | static void * handle_out_of_memory(size_t) |
464 | { | |
465 | _Jv_ThrowNoMemory(); | |
466 | } | |
467 | ||
ee9dd372 TT |
468 | void |
469 | _Jv_InitGC (void) | |
470 | { | |
471 | int proc; | |
472 | DCL_LOCK_STATE; | |
473 | ||
474 | DISABLE_SIGNALS (); | |
475 | LOCK (); | |
476 | ||
477 | if (initialized) | |
478 | { | |
479 | UNLOCK (); | |
480 | ENABLE_SIGNALS (); | |
481 | return; | |
482 | } | |
483 | initialized = 1; | |
bf3b8e42 HB |
484 | UNLOCK (); |
485 | ||
486 | // Configure the collector to use the bitmap marking descriptors that we | |
487 | // stash in the class vtable. | |
488 | GC_init_gcj_malloc (0, (void *) _Jv_MarkObj); | |
489 | ||
3610e0d5 TT |
490 | // Cause an out of memory error to be thrown from the allocators, |
491 | // instead of returning 0. This is cheaper than checking on allocation. | |
492 | GC_oom_fn = handle_out_of_memory; | |
493 | ||
bf3b8e42 HB |
494 | LOCK (); |
495 | GC_java_finalization = 1; | |
496 | ||
497 | // We use a different mark procedure for object arrays. This code | |
498 | // configures a different object `kind' for object array allocation and | |
499 | // marking. FIXME: see above. | |
500 | array_free_list = (ptr_t *) GC_generic_malloc_inner ((MAXOBJSZ + 1) | |
501 | * sizeof (ptr_t), | |
502 | PTRFREE); | |
503 | memset (array_free_list, 0, (MAXOBJSZ + 1) * sizeof (ptr_t)); | |
504 | ||
505 | proc = GC_n_mark_procs++; | |
1f4eb17d | 506 | GC_mark_procs[proc] = (GC_mark_proc) _Jv_MarkArray; |
bf3b8e42 HB |
507 | |
508 | array_kind_x = GC_n_kinds++; | |
509 | GC_obj_kinds[array_kind_x].ok_freelist = array_free_list; | |
510 | GC_obj_kinds[array_kind_x].ok_reclaim_list = 0; | |
1f4eb17d | 511 | GC_obj_kinds[array_kind_x].ok_descriptor = GC_MAKE_PROC (proc, 0); |
bf3b8e42 HB |
512 | GC_obj_kinds[array_kind_x].ok_relocate_descr = FALSE; |
513 | GC_obj_kinds[array_kind_x].ok_init = TRUE; | |
514 | ||
515 | _Jv_MutexInit (&disable_gc_mutex); | |
516 | ||
517 | UNLOCK (); | |
518 | ENABLE_SIGNALS (); | |
519 | } | |
520 | ||
3610e0d5 TT |
521 | #ifdef JV_HASH_SYNCHRONIZATION |
522 | // Allocate an object with a fake vtable pointer, which causes only | |
523 | // the first field (beyond the fake vtable pointer) to be traced. | |
524 | // Eventually this should probably be generalized. | |
525 | ||
526 | static _Jv_VTable trace_one_vtable = { | |
527 | 0, // class pointer | |
528 | (void *)(2 * sizeof(void *)), | |
529 | // descriptor; scan 2 words incl. vtable ptr. | |
530 | // Least significant bits must be zero to | |
531 | // identify this as a lenght descriptor | |
532 | {0} // First method | |
533 | }; | |
534 | ||
535 | void * | |
536 | _Jv_AllocTraceOne (jsize size /* includes vtable slot */) | |
537 | { | |
538 | return GC_GCJ_MALLOC (size, &trace_one_vtable); | |
539 | } | |
540 | ||
541 | #endif /* JV_HASH_SYNCHRONIZATION */ | |
542 | ||
bf3b8e42 HB |
543 | #if 0 |
544 | void | |
545 | _Jv_InitGC (void) | |
546 | { | |
547 | int proc; | |
548 | DCL_LOCK_STATE; | |
549 | ||
550 | DISABLE_SIGNALS (); | |
551 | LOCK (); | |
552 | ||
553 | if (initialized) | |
554 | { | |
555 | UNLOCK (); | |
556 | ENABLE_SIGNALS (); | |
557 | return; | |
558 | } | |
559 | initialized = 1; | |
ee9dd372 | 560 | |
e40217a7 TT |
561 | GC_java_finalization = 1; |
562 | ||
ee9dd372 TT |
563 | // Set up state for marking and allocation of Java objects. |
564 | obj_free_list = (ptr_t *) GC_generic_malloc_inner ((MAXOBJSZ + 1) | |
565 | * sizeof (ptr_t), | |
566 | PTRFREE); | |
567 | memset (obj_free_list, 0, (MAXOBJSZ + 1) * sizeof (ptr_t)); | |
568 | ||
569 | proc = GC_n_mark_procs++; | |
1f4eb17d | 570 | GC_mark_procs[proc] = (GC_mark_proc) _Jv_MarkObj; |
ee9dd372 TT |
571 | |
572 | obj_kind_x = GC_n_kinds++; | |
573 | GC_obj_kinds[obj_kind_x].ok_freelist = obj_free_list; | |
574 | GC_obj_kinds[obj_kind_x].ok_reclaim_list = 0; | |
1f4eb17d | 575 | GC_obj_kinds[obj_kind_x].ok_descriptor = GC_MAKE_PROC (proc, 0); |
ee9dd372 TT |
576 | GC_obj_kinds[obj_kind_x].ok_relocate_descr = FALSE; |
577 | GC_obj_kinds[obj_kind_x].ok_init = TRUE; | |
578 | ||
579 | // Set up state for marking and allocation of arrays of Java | |
580 | // objects. | |
581 | array_free_list = (ptr_t *) GC_generic_malloc_inner ((MAXOBJSZ + 1) | |
582 | * sizeof (ptr_t), | |
583 | PTRFREE); | |
584 | memset (array_free_list, 0, (MAXOBJSZ + 1) * sizeof (ptr_t)); | |
585 | ||
586 | proc = GC_n_mark_procs++; | |
1f4eb17d | 587 | GC_mark_procs[proc] = (GC_mark_proc) _Jv_MarkArray; |
ee9dd372 TT |
588 | |
589 | array_kind_x = GC_n_kinds++; | |
590 | GC_obj_kinds[array_kind_x].ok_freelist = array_free_list; | |
591 | GC_obj_kinds[array_kind_x].ok_reclaim_list = 0; | |
1f4eb17d | 592 | GC_obj_kinds[array_kind_x].ok_descriptor = GC_MAKE_PROC (proc, 0); |
ee9dd372 TT |
593 | GC_obj_kinds[array_kind_x].ok_relocate_descr = FALSE; |
594 | GC_obj_kinds[array_kind_x].ok_init = TRUE; | |
595 | ||
54c2f04b AG |
596 | _Jv_MutexInit (&disable_gc_mutex); |
597 | ||
ee9dd372 TT |
598 | UNLOCK (); |
599 | ENABLE_SIGNALS (); | |
600 | } | |
bf3b8e42 | 601 | #endif /* 0 */ |