19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoaderData.inline.hpp"
27 #include "classfile/loaderConstraints.hpp"
28 #include "memory/resourceArea.hpp"
29 #include "oops/oop.inline.hpp"
30 #include "runtime/handles.inline.hpp"
31 #include "runtime/safepoint.hpp"
32 #include "utilities/hashtable.inline.hpp"
33
34 void LoaderConstraintEntry::set_loader(int i, oop p) {
35 set_loader_data(i, ClassLoaderData::class_loader_data(p));
36 }
37
38 LoaderConstraintTable::LoaderConstraintTable(int nof_buckets)
39 : Hashtable<Klass*, mtClass>(nof_buckets, sizeof(LoaderConstraintEntry)) {};
40
41
42 LoaderConstraintEntry* LoaderConstraintTable::new_entry(
43 unsigned int hash, Symbol* name,
44 Klass* klass, int num_loaders,
45 int max_loaders) {
46 LoaderConstraintEntry* entry;
47 entry = (LoaderConstraintEntry*)Hashtable<Klass*, mtClass>::new_entry(hash, klass);
48 entry->set_name(name);
49 entry->set_num_loaders(num_loaders);
50 entry->set_max_loaders(max_loaders);
51 return entry;
52 }
53
54 void LoaderConstraintTable::free_entry(LoaderConstraintEntry *entry) {
55 // decrement name refcount before freeing
56 entry->name()->decrement_refcount();
57 Hashtable<Klass*, mtClass>::free_entry(entry);
58 }
59
60 // Enhanced Class Redefinition support
61 void LoaderConstraintTable::classes_do(KlassClosure* f) {
62 for (int index = 0; index < table_size(); index++) {
63 for (LoaderConstraintEntry* probe = bucket(index);
64 probe != NULL;
65 probe = probe->next()) {
66 if (probe->klass() != NULL) {
67 f->do_klass(probe->klass());
68 }
69 }
70 }
71 }
72
73 // The loaderConstraintTable must always be accessed with the
74 // SystemDictionary lock held. This is true even for readers as
75 // entries in the table could be being dynamically resized.
76
77 LoaderConstraintEntry** LoaderConstraintTable::find_loader_constraint(
89 for (int i = p->num_loaders() - 1; i >= 0; i--) {
90 if (p->loader_data(i) == loader_data) {
91 return pp;
92 }
93 }
94 }
95 }
96 pp = p->next_addr();
97 }
98 return pp;
99 }
100
101
102 void LoaderConstraintTable::purge_loader_constraints() {
103 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
104 // Remove unloaded entries from constraint table
105 for (int index = 0; index < table_size(); index++) {
106 LoaderConstraintEntry** p = bucket_addr(index);
107 while(*p) {
108 LoaderConstraintEntry* probe = *p;
109 Klass* klass = probe->klass();
110 // Remove klass that is no longer alive
111 if (klass != NULL &&
112 klass->class_loader_data()->is_unloading()) {
113 probe->set_klass(NULL);
114 if (log_is_enabled(Info, class, loader, constraints)) {
115 ResourceMark rm;
116 outputStream* out = Log(class, loader, constraints)::info_stream();
117 out->print_cr("purging class object from constraint for name %s,"
118 " loader list:",
119 probe->name()->as_C_string());
120 for (int i = 0; i < probe->num_loaders(); i++) {
121 out->print_cr(" [%d]: %s", i,
122 probe->loader_data(i)->loader_name());
123 }
124 }
125 }
126 // Remove entries no longer alive from loader array
127 int n = 0;
128 while (n < probe->num_loaders()) {
129 if (probe->loader_data(n)->is_unloading()) {
169 // Purge entry
170 *p = probe->next();
171 FREE_C_HEAP_ARRAY(oop, probe->loaders());
172 free_entry(probe);
173 } else {
174 #ifdef ASSERT
175 if (probe->klass() != NULL) {
176 ClassLoaderData* loader_data =
177 probe->klass()->class_loader_data();
178 assert(!loader_data->is_unloading(), "klass should be live");
179 }
180 #endif
181 // Go to next entry
182 p = probe->next_addr();
183 }
184 }
185 }
186 }
187
188 bool LoaderConstraintTable::add_entry(Symbol* class_name,
189 Klass* klass1, Handle class_loader1,
190 Klass* klass2, Handle class_loader2) {
191 int failure_code = 0; // encode different reasons for failing
192
193 if (klass1 != NULL && klass2 != NULL && klass1 != klass2) {
194 failure_code = 1;
195 } else {
196 Klass* klass = klass1 != NULL ? klass1 : klass2;
197
198 LoaderConstraintEntry** pp1 = find_loader_constraint(class_name,
199 class_loader1);
200 if (*pp1 != NULL && (*pp1)->klass() != NULL) {
201 if (klass != NULL) {
202 if (klass != (*pp1)->klass()) {
203 failure_code = 2;
204 }
205 } else {
206 klass = (*pp1)->klass();
207 }
208 }
209
210 LoaderConstraintEntry** pp2 = find_loader_constraint(class_name,
211 class_loader2);
212 if (*pp2 != NULL && (*pp2)->klass() != NULL) {
213 if (klass != NULL) {
214 if (klass != (*pp2)->klass()) {
215 failure_code = 3;
216 }
278 " the stored class object in the constraint"; break;
279 case 3: reason = "the class object presented by loader[1] does not match"
280 " the stored class object in the constraint"; break;
281 default: reason = "unknown reason code";
282 }
283 out->print_cr("failed to add constraint for name: %s, loader[0]: %s,"
284 " loader[1]: %s, Reason: %s",
285 class_name->as_C_string(),
286 SystemDictionary::loader_name(class_loader1()),
287 SystemDictionary::loader_name(class_loader2()),
288 reason
289 );
290 }
291
292 return failure_code == 0;
293 }
294
295
296 // return true if the constraint was updated, false if the constraint is
297 // violated
298 bool LoaderConstraintTable::check_or_update(instanceKlassHandle k,
299 Handle loader,
300 Symbol* name) {
301 LoaderConstraintEntry* p = *(find_loader_constraint(name, loader));
302 if (p && p->klass() != NULL && p->klass() != k()) {
303 if (log_is_enabled(Info, class, loader, constraints)) {
304 ResourceMark rm;
305 outputStream* out = Log(class, loader, constraints)::info_stream();
306 out->print_cr("constraint check failed for name %s, loader %s: "
307 "the presented class object differs from that stored",
308 name->as_C_string(),
309 SystemDictionary::loader_name(loader()));
310 }
311 return false;
312 } else {
313 if (p && p->klass() == NULL) {
314 p->set_klass(k());
315 if (log_is_enabled(Info, class, loader, constraints)) {
316 ResourceMark rm;
317 outputStream* out = Log(class, loader, constraints)::info_stream();
318 out->print_cr("updating constraint for name %s, loader %s, "
319 "by setting class object",
320 name->as_C_string(),
321 SystemDictionary::loader_name(loader()));
322 }
323 }
324 return true;
325 }
326 }
327
328 Klass* LoaderConstraintTable::find_constrained_klass(Symbol* name,
329 Handle loader) {
330 LoaderConstraintEntry *p = *(find_loader_constraint(name, loader));
331 if (p != NULL && p->klass() != NULL) {
332 if (p->klass()->is_instance_klass() && !InstanceKlass::cast(p->klass())->is_loaded()) {
333 // Only return fully loaded classes. Classes found through the
334 // constraints might still be in the process of loading.
335 return NULL;
336 }
337 return p->klass();
338 }
339
340 // No constraints, or else no klass loaded yet.
341 return NULL;
342 }
343
344 void LoaderConstraintTable::ensure_loader_constraint_capacity(
345 LoaderConstraintEntry *p,
346 int nfree) {
347 if (p->max_loaders() - p->num_loaders() < nfree) {
348 int n = nfree + p->num_loaders();
349 ClassLoaderData** new_loaders = NEW_C_HEAP_ARRAY(ClassLoaderData*, n, mtClass);
350 memcpy(new_loaders, p->loaders(), sizeof(ClassLoaderData*) * p->num_loaders());
351 p->set_max_loaders(n);
352 FREE_C_HEAP_ARRAY(ClassLoaderData*, p->loaders());
353 p->set_loaders(new_loaders);
354 }
355 }
356
357
358 void LoaderConstraintTable::extend_loader_constraint(LoaderConstraintEntry* p,
359 Handle loader,
360 Klass* klass) {
361 ensure_loader_constraint_capacity(p, 1);
362 int num = p->num_loaders();
363 p->set_loader(num, loader());
364 p->set_num_loaders(num + 1);
365 if (log_is_enabled(Info, class, loader, constraints)) {
366 ResourceMark rm;
367 outputStream* out = Log(class, loader, constraints)::info_stream();
368 out->print_cr("extending constraint for name %s by adding loader[%d]: %s %s",
369 p->name()->as_C_string(),
370 num,
371 SystemDictionary::loader_name(loader()),
372 (p->klass() == NULL ? " and setting class object" : "")
373 );
374 }
375 if (p->klass() == NULL) {
376 p->set_klass(klass);
377 } else {
378 assert(klass == NULL || p->klass() == klass, "constraints corrupted");
379 }
380 }
381
382
383 void LoaderConstraintTable::merge_loader_constraints(
384 LoaderConstraintEntry** pp1,
385 LoaderConstraintEntry** pp2,
386 Klass* klass) {
387 // make sure *pp1 has higher capacity
388 if ((*pp1)->max_loaders() < (*pp2)->max_loaders()) {
389 LoaderConstraintEntry** tmp = pp2;
390 pp2 = pp1;
391 pp1 = tmp;
392 }
393
394 LoaderConstraintEntry* p1 = *pp1;
395 LoaderConstraintEntry* p2 = *pp2;
396
397 ensure_loader_constraint_capacity(p1, p2->num_loaders());
398
399 for (int i = 0; i < p2->num_loaders(); i++) {
400 int num = p1->num_loaders();
401 p1->set_loader_data(num, p2->loader_data(i));
402 p1->set_num_loaders(num + 1);
403 }
404
405 if (log_is_enabled(Info, class, loader, constraints)) {
406 ResourceMark rm;
430 p1->set_klass(klass);
431 } else {
432 assert(p1->klass() == klass, "constraints corrupted");
433 }
434
435 *pp2 = p2->next();
436 FREE_C_HEAP_ARRAY(oop, p2->loaders());
437 free_entry(p2);
438 return;
439 }
440
441
442 void LoaderConstraintTable::verify(Dictionary* dictionary,
443 PlaceholderTable* placeholders) {
444 Thread *thread = Thread::current();
445 for (int cindex = 0; cindex < _loader_constraint_size; cindex++) {
446 for (LoaderConstraintEntry* probe = bucket(cindex);
447 probe != NULL;
448 probe = probe->next()) {
449 if (probe->klass() != NULL) {
450 InstanceKlass* ik = InstanceKlass::cast(probe->klass());
451 guarantee(ik->name() == probe->name(), "name should match");
452 Symbol* name = ik->name();
453 ClassLoaderData* loader_data = ik->class_loader_data();
454 unsigned int d_hash = dictionary->compute_hash(name, loader_data);
455 int d_index = dictionary->hash_to_index(d_hash);
456 Klass* k = dictionary->find_class(d_index, d_hash, name, loader_data);
457 if (k != NULL) {
458 // We found the class in the system dictionary, so we should
459 // make sure that the Klass* matches what we already have.
460 guarantee(k == probe->klass(), "klass should be in dictionary");
461 } else {
462 // If we don't find the class in the system dictionary, it
463 // has to be in the placeholders table.
464 unsigned int p_hash = placeholders->compute_hash(name, loader_data);
465 int p_index = placeholders->hash_to_index(p_hash);
466 PlaceholderEntry* entry = placeholders->get_entry(p_index, p_hash,
467 name, loader_data);
468
469 // The InstanceKlass might not be on the entry, so the only
470 // thing we can check here is whether we were successful in
471 // finding the class in the placeholders table.
472 guarantee(entry != NULL, "klass should be in the placeholders");
473 }
474 }
475 for (int n = 0; n< probe->num_loaders(); n++) {
476 assert(ClassLoaderDataGraph::contains_loader_data(probe->loader_data(n)), "The loader is missing");
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoaderData.inline.hpp"
27 #include "classfile/loaderConstraints.hpp"
28 #include "memory/resourceArea.hpp"
29 #include "oops/oop.inline.hpp"
30 #include "runtime/handles.inline.hpp"
31 #include "runtime/safepoint.hpp"
32 #include "utilities/hashtable.inline.hpp"
33
34 void LoaderConstraintEntry::set_loader(int i, oop p) {
35 set_loader_data(i, ClassLoaderData::class_loader_data(p));
36 }
37
38 LoaderConstraintTable::LoaderConstraintTable(int nof_buckets)
39 : Hashtable<InstanceKlass*, mtClass>(nof_buckets, sizeof(LoaderConstraintEntry)) {};
40
41
42 LoaderConstraintEntry* LoaderConstraintTable::new_entry(
43 unsigned int hash, Symbol* name,
44 InstanceKlass* klass, int num_loaders,
45 int max_loaders) {
46 LoaderConstraintEntry* entry;
47 entry = (LoaderConstraintEntry*)Hashtable<InstanceKlass*, mtClass>::new_entry(hash, klass);
48 entry->set_name(name);
49 entry->set_num_loaders(num_loaders);
50 entry->set_max_loaders(max_loaders);
51 return entry;
52 }
53
54 void LoaderConstraintTable::free_entry(LoaderConstraintEntry *entry) {
55 // decrement name refcount before freeing
56 entry->name()->decrement_refcount();
57 Hashtable<InstanceKlass*, mtClass>::free_entry(entry);
58 }
59
60 // Enhanced Class Redefinition support
61 void LoaderConstraintTable::classes_do(KlassClosure* f) {
62 for (int index = 0; index < table_size(); index++) {
63 for (LoaderConstraintEntry* probe = bucket(index);
64 probe != NULL;
65 probe = probe->next()) {
66 if (probe->klass() != NULL) {
67 f->do_klass(probe->klass());
68 }
69 }
70 }
71 }
72
73 // The loaderConstraintTable must always be accessed with the
74 // SystemDictionary lock held. This is true even for readers as
75 // entries in the table could be being dynamically resized.
76
77 LoaderConstraintEntry** LoaderConstraintTable::find_loader_constraint(
89 for (int i = p->num_loaders() - 1; i >= 0; i--) {
90 if (p->loader_data(i) == loader_data) {
91 return pp;
92 }
93 }
94 }
95 }
96 pp = p->next_addr();
97 }
98 return pp;
99 }
100
101
102 void LoaderConstraintTable::purge_loader_constraints() {
103 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
104 // Remove unloaded entries from constraint table
105 for (int index = 0; index < table_size(); index++) {
106 LoaderConstraintEntry** p = bucket_addr(index);
107 while(*p) {
108 LoaderConstraintEntry* probe = *p;
109 InstanceKlass* klass = probe->klass();
110 // Remove klass that is no longer alive
111 if (klass != NULL &&
112 klass->class_loader_data()->is_unloading()) {
113 probe->set_klass(NULL);
114 if (log_is_enabled(Info, class, loader, constraints)) {
115 ResourceMark rm;
116 outputStream* out = Log(class, loader, constraints)::info_stream();
117 out->print_cr("purging class object from constraint for name %s,"
118 " loader list:",
119 probe->name()->as_C_string());
120 for (int i = 0; i < probe->num_loaders(); i++) {
121 out->print_cr(" [%d]: %s", i,
122 probe->loader_data(i)->loader_name());
123 }
124 }
125 }
126 // Remove entries no longer alive from loader array
127 int n = 0;
128 while (n < probe->num_loaders()) {
129 if (probe->loader_data(n)->is_unloading()) {
169 // Purge entry
170 *p = probe->next();
171 FREE_C_HEAP_ARRAY(oop, probe->loaders());
172 free_entry(probe);
173 } else {
174 #ifdef ASSERT
175 if (probe->klass() != NULL) {
176 ClassLoaderData* loader_data =
177 probe->klass()->class_loader_data();
178 assert(!loader_data->is_unloading(), "klass should be live");
179 }
180 #endif
181 // Go to next entry
182 p = probe->next_addr();
183 }
184 }
185 }
186 }
187
188 bool LoaderConstraintTable::add_entry(Symbol* class_name,
189 InstanceKlass* klass1, Handle class_loader1,
190 InstanceKlass* klass2, Handle class_loader2) {
191 int failure_code = 0; // encode different reasons for failing
192
193 if (klass1 != NULL && klass2 != NULL && klass1 != klass2) {
194 failure_code = 1;
195 } else {
196 InstanceKlass* klass = klass1 != NULL ? klass1 : klass2;
197
198 LoaderConstraintEntry** pp1 = find_loader_constraint(class_name,
199 class_loader1);
200 if (*pp1 != NULL && (*pp1)->klass() != NULL) {
201 if (klass != NULL) {
202 if (klass != (*pp1)->klass()) {
203 failure_code = 2;
204 }
205 } else {
206 klass = (*pp1)->klass();
207 }
208 }
209
210 LoaderConstraintEntry** pp2 = find_loader_constraint(class_name,
211 class_loader2);
212 if (*pp2 != NULL && (*pp2)->klass() != NULL) {
213 if (klass != NULL) {
214 if (klass != (*pp2)->klass()) {
215 failure_code = 3;
216 }
278 " the stored class object in the constraint"; break;
279 case 3: reason = "the class object presented by loader[1] does not match"
280 " the stored class object in the constraint"; break;
281 default: reason = "unknown reason code";
282 }
283 out->print_cr("failed to add constraint for name: %s, loader[0]: %s,"
284 " loader[1]: %s, Reason: %s",
285 class_name->as_C_string(),
286 SystemDictionary::loader_name(class_loader1()),
287 SystemDictionary::loader_name(class_loader2()),
288 reason
289 );
290 }
291
292 return failure_code == 0;
293 }
294
295
296 // return true if the constraint was updated, false if the constraint is
297 // violated
298 bool LoaderConstraintTable::check_or_update(InstanceKlass* k,
299 Handle loader,
300 Symbol* name) {
301 LoaderConstraintEntry* p = *(find_loader_constraint(name, loader));
302 if (p && p->klass() != NULL && p->klass() != k) {
303 if (log_is_enabled(Info, class, loader, constraints)) {
304 ResourceMark rm;
305 outputStream* out = Log(class, loader, constraints)::info_stream();
306 out->print_cr("constraint check failed for name %s, loader %s: "
307 "the presented class object differs from that stored",
308 name->as_C_string(),
309 SystemDictionary::loader_name(loader()));
310 }
311 return false;
312 } else {
313 if (p && p->klass() == NULL) {
314 p->set_klass(k);
315 if (log_is_enabled(Info, class, loader, constraints)) {
316 ResourceMark rm;
317 outputStream* out = Log(class, loader, constraints)::info_stream();
318 out->print_cr("updating constraint for name %s, loader %s, "
319 "by setting class object",
320 name->as_C_string(),
321 SystemDictionary::loader_name(loader()));
322 }
323 }
324 return true;
325 }
326 }
327
328 InstanceKlass* LoaderConstraintTable::find_constrained_klass(Symbol* name,
329 Handle loader) {
330 LoaderConstraintEntry *p = *(find_loader_constraint(name, loader));
331 if (p != NULL && p->klass() != NULL) {
332 assert(p->klass()->is_instance_klass(), "sanity");
333 if (p->klass()->is_loaded()) {
334 // Only return fully loaded classes. Classes found through the
335 // constraints might still be in the process of loading.
336 return NULL;
337 }
338 return p->klass();
339 }
340
341 // No constraints, or else no klass loaded yet.
342 return NULL;
343 }
344
345 void LoaderConstraintTable::ensure_loader_constraint_capacity(
346 LoaderConstraintEntry *p,
347 int nfree) {
348 if (p->max_loaders() - p->num_loaders() < nfree) {
349 int n = nfree + p->num_loaders();
350 ClassLoaderData** new_loaders = NEW_C_HEAP_ARRAY(ClassLoaderData*, n, mtClass);
351 memcpy(new_loaders, p->loaders(), sizeof(ClassLoaderData*) * p->num_loaders());
352 p->set_max_loaders(n);
353 FREE_C_HEAP_ARRAY(ClassLoaderData*, p->loaders());
354 p->set_loaders(new_loaders);
355 }
356 }
357
358
359 void LoaderConstraintTable::extend_loader_constraint(LoaderConstraintEntry* p,
360 Handle loader,
361 InstanceKlass* klass) {
362 ensure_loader_constraint_capacity(p, 1);
363 int num = p->num_loaders();
364 p->set_loader(num, loader());
365 p->set_num_loaders(num + 1);
366 if (log_is_enabled(Info, class, loader, constraints)) {
367 ResourceMark rm;
368 outputStream* out = Log(class, loader, constraints)::info_stream();
369 out->print_cr("extending constraint for name %s by adding loader[%d]: %s %s",
370 p->name()->as_C_string(),
371 num,
372 SystemDictionary::loader_name(loader()),
373 (p->klass() == NULL ? " and setting class object" : "")
374 );
375 }
376 if (p->klass() == NULL) {
377 p->set_klass(klass);
378 } else {
379 assert(klass == NULL || p->klass() == klass, "constraints corrupted");
380 }
381 }
382
383
384 void LoaderConstraintTable::merge_loader_constraints(
385 LoaderConstraintEntry** pp1,
386 LoaderConstraintEntry** pp2,
387 InstanceKlass* klass) {
388 // make sure *pp1 has higher capacity
389 if ((*pp1)->max_loaders() < (*pp2)->max_loaders()) {
390 LoaderConstraintEntry** tmp = pp2;
391 pp2 = pp1;
392 pp1 = tmp;
393 }
394
395 LoaderConstraintEntry* p1 = *pp1;
396 LoaderConstraintEntry* p2 = *pp2;
397
398 ensure_loader_constraint_capacity(p1, p2->num_loaders());
399
400 for (int i = 0; i < p2->num_loaders(); i++) {
401 int num = p1->num_loaders();
402 p1->set_loader_data(num, p2->loader_data(i));
403 p1->set_num_loaders(num + 1);
404 }
405
406 if (log_is_enabled(Info, class, loader, constraints)) {
407 ResourceMark rm;
431 p1->set_klass(klass);
432 } else {
433 assert(p1->klass() == klass, "constraints corrupted");
434 }
435
436 *pp2 = p2->next();
437 FREE_C_HEAP_ARRAY(oop, p2->loaders());
438 free_entry(p2);
439 return;
440 }
441
442
443 void LoaderConstraintTable::verify(Dictionary* dictionary,
444 PlaceholderTable* placeholders) {
445 Thread *thread = Thread::current();
446 for (int cindex = 0; cindex < _loader_constraint_size; cindex++) {
447 for (LoaderConstraintEntry* probe = bucket(cindex);
448 probe != NULL;
449 probe = probe->next()) {
450 if (probe->klass() != NULL) {
451 InstanceKlass* ik = probe->klass();
452 guarantee(ik->name() == probe->name(), "name should match");
453 Symbol* name = ik->name();
454 ClassLoaderData* loader_data = ik->class_loader_data();
455 unsigned int d_hash = dictionary->compute_hash(name, loader_data);
456 int d_index = dictionary->hash_to_index(d_hash);
457 InstanceKlass* k = dictionary->find_class(d_index, d_hash, name, loader_data);
458 if (k != NULL) {
459 // We found the class in the system dictionary, so we should
460 // make sure that the Klass* matches what we already have.
461 guarantee(k == probe->klass(), "klass should be in dictionary");
462 } else {
463 // If we don't find the class in the system dictionary, it
464 // has to be in the placeholders table.
465 unsigned int p_hash = placeholders->compute_hash(name, loader_data);
466 int p_index = placeholders->hash_to_index(p_hash);
467 PlaceholderEntry* entry = placeholders->get_entry(p_index, p_hash,
468 name, loader_data);
469
470 // The InstanceKlass might not be on the entry, so the only
471 // thing we can check here is whether we were successful in
472 // finding the class in the placeholders table.
473 guarantee(entry != NULL, "klass should be in the placeholders");
474 }
475 }
476 for (int n = 0; n< probe->num_loaders(); n++) {
477 assert(ClassLoaderDataGraph::contains_loader_data(probe->loader_data(n)), "The loader is missing");
|