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2010-02-13 Zoltan Varga <vargaz@gmail.com>
[mono/afaerber.git] / mono / mini / aot-runtime.c
blobd0fea4578a0e8731bd2f849581a385e4fb9f87f0
1 /*
2 * aot-runtime.c: mono Ahead of Time compiler
3 *
4 * Author:
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Zoltan Varga (vargaz@gmail.com)
7 *
8 * (C) 2002 Ximian, Inc.
9 */
10
11 #include "config.h"
12 #include <sys/types.h>
13 #ifdef HAVE_UNISTD_H
14 #include <unistd.h>
15 #endif
16 #include <fcntl.h>
17 #include <string.h>
18 #ifdef HAVE_SYS_MMAN_H
19 #include <sys/mman.h>
20 #endif
21
22 #if HOST_WIN32
23 #include <winsock2.h>
24 #include <windows.h>
25 #endif
26
27 #ifdef HAVE_EXECINFO_H
28 #include <execinfo.h>
29 #endif
30
31 #include <errno.h>
32 #include <sys/stat.h>
33
34 #ifdef HAVE_SYS_WAIT_H
35 #include <sys/wait.h> /* for WIFEXITED, WEXITSTATUS */
36 #endif
37
38 #ifdef HAVE_DL_ITERATE_PHDR
39 #include <link.h>
40 #endif
41
42 #include <mono/metadata/tabledefs.h>
43 #include <mono/metadata/class.h>
44 #include <mono/metadata/object.h>
45 #include <mono/metadata/tokentype.h>
46 #include <mono/metadata/appdomain.h>
47 #include <mono/metadata/debug-helpers.h>
48 #include <mono/metadata/assembly.h>
49 #include <mono/metadata/metadata-internals.h>
50 #include <mono/metadata/marshal.h>
51 #include <mono/metadata/gc-internal.h>
52 #include <mono/metadata/monitor.h>
53 #include <mono/metadata/threads-types.h>
54 #include <mono/utils/mono-logger.h>
55 #include <mono/utils/mono-mmap.h>
56 #include "mono/utils/mono-compiler.h"
57 #include <mono/utils/mono-counters.h>
58
59 #include "mini.h"
60 #include "version.h"
61
62 #ifndef DISABLE_AOT
63
64 #ifdef TARGET_WIN32
65 #define SHARED_EXT ".dll"
66 #elif ((defined(__ppc__) || defined(__powerpc__) || defined(__ppc64__)) || defined(__MACH__)) && !defined(__linux__)
67 #define SHARED_EXT ".dylib"
68 #else
69 #define SHARED_EXT ".so"
70 #endif
71
72 #define ALIGN_PTR_TO(ptr,align) (gpointer)((((gssize)(ptr)) + (align - 1)) & (~(align - 1)))
73 #define ROUND_DOWN(VALUE,SIZE) ((VALUE) & ~((SIZE) - 1))
74
75 typedef struct MonoAotModule {
76 char *aot_name;
77 /* Pointer to the Global Offset Table */
78 gpointer *got;
79 GHashTable *name_cache;
80 GHashTable *extra_methods;
81 /* Maps methods to their code */
82 GHashTable *method_to_code;
83 /* Maps pointers into the method info to the methods themselves */
84 GHashTable *method_ref_to_method;
85 MonoAssemblyName *image_names;
86 char **image_guids;
87 MonoAssembly *assembly;
88 MonoImage **image_table;
89 guint32 image_table_len;
90 gboolean out_of_date;
91 gboolean plt_inited;
92 guint8 *mem_begin;
93 guint8 *mem_end;
94 guint8 *code;
95 guint8 *code_end;
96 guint8 *plt;
97 guint8 *plt_end;
98 guint8 *blob;
99 gint32 *code_offsets;
100 /* This contains <offset, index> pairs sorted by offset */
101 /* This is needed because LLVM emitted methods can be in any order */
102 gint32 *sorted_code_offsets;
103 guint32 *method_info_offsets;
104 guint32 *got_info_offsets;
105 guint32 *ex_info_offsets;
106 guint32 *class_info_offsets;
107 guint32 *methods_loaded;
108 guint16 *class_name_table;
109 guint32 *extra_method_table;
110 guint32 *extra_method_info_offsets;
111 guint8 *unwind_info;
112
113 /* Points to the GNU .eh_frame_hdr section, if it exists */
114 guint8 *eh_frame_hdr;
115
116 /* Points to the .ARM.exidx section, if it exists */
117 guint8 *arm_exidx;
118 guint32 arm_exidx_size;
119
120 /* Points to the trampolines */
121 guint8 *trampolines [MONO_AOT_TRAMP_NUM];
122 /* The first unused trampoline of each kind */
123 guint32 trampoline_index [MONO_AOT_TRAMP_NUM];
124
125 MonoAotFileInfo info;
126
127 gpointer *globals;
128 MonoDl *sofile;
129 } MonoAotModule;
130
131 static GHashTable *aot_modules;
132 #define mono_aot_lock() EnterCriticalSection (&aot_mutex)
133 #define mono_aot_unlock() LeaveCriticalSection (&aot_mutex)
134 static CRITICAL_SECTION aot_mutex;
135
136 /*
137 * Maps assembly names to the mono_aot_module_<NAME>_info symbols in the
138 * AOT modules registered by mono_aot_register_module ().
139 */
140 static GHashTable *static_aot_modules;
141
142 /*
143 * Maps MonoJitInfo* to the aot module they belong to, this can be different
144 * from ji->method->klass->image's aot module for generic instances.
145 */
146 static GHashTable *ji_to_amodule;
147
148 /*
149 * Whenever to AOT compile loaded assemblies on demand and store them in
150 * a cache under $HOME/.mono/aot-cache.
151 */
152 static gboolean use_aot_cache = FALSE;
153
154 /*
155 * Whenever to spawn a new process to AOT a file or do it in-process. Only relevant if
156 * use_aot_cache is TRUE.
157 */
158 static gboolean spawn_compiler = TRUE;
159
160 /* For debugging */
161 static gint32 mono_last_aot_method = -1;
162
163 static gboolean make_unreadable = FALSE;
164 static guint32 name_table_accesses = 0;
165
166 /* Used to speed-up find_aot_module () */
167 static gsize aot_code_low_addr = (gssize)-1;
168 static gsize aot_code_high_addr = 0;
169
170 static void
171 init_plt (MonoAotModule *info);
172
173 /*****************************************************/
174 /* AOT RUNTIME */
175 /*****************************************************/
176
177 /*
178 * load_image:
179 *
180 * Load one of the images referenced by AMODULE. Returns NULL if the image is not
181 * found, and sets the loader error if SET_ERROR is TRUE.
182 */
183 static MonoImage *
184 load_image (MonoAotModule *amodule, int index, gboolean set_error)
185 {
186 MonoAssembly *assembly;
187 MonoImageOpenStatus status;
188
189 g_assert (index < amodule->image_table_len);
190
191 if (amodule->image_table [index])
192 return amodule->image_table [index];
193 if (amodule->out_of_date)
194 return NULL;
195
196 assembly = mono_assembly_load (&amodule->image_names [index], NULL, &status);
197 if (!assembly) {
198 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s is unusable because dependency %s is not found.\n", amodule->aot_name, amodule->image_names [index].name);
199 amodule->out_of_date = TRUE;
200
201 if (set_error) {
202 char *full_name = mono_stringify_assembly_name (&amodule->image_names [index]);
203 mono_loader_set_error_assembly_load (full_name, FALSE);
204 g_free (full_name);
205 }
206 return NULL;
207 }
208
209 if (strcmp (assembly->image->guid, amodule->image_guids [index])) {
210 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s is out of date (Older than dependency %s).\n", amodule->aot_name, amodule->image_names [index].name);
211 amodule->out_of_date = TRUE;
212 return NULL;
213 }
214
215 amodule->image_table [index] = assembly->image;
216 return assembly->image;
217 }
218
219 static inline gint32
220 decode_value (guint8 *ptr, guint8 **rptr)
221 {
222 guint8 b = *ptr;
223 gint32 len;
224
225 if ((b & 0x80) == 0){
226 len = b;
227 ++ptr;
228 } else if ((b & 0x40) == 0){
229 len = ((b & 0x3f) << 8 | ptr [1]);
230 ptr += 2;
231 } else if (b != 0xff) {
232 len = ((b & 0x1f) << 24) |
233 (ptr [1] << 16) |
234 (ptr [2] << 8) |
235 ptr [3];
236 ptr += 4;
237 }
238 else {
239 len = (ptr [1] << 24) | (ptr [2] << 16) | (ptr [3] << 8) | ptr [4];
240 ptr += 5;
241 }
242 if (rptr)
243 *rptr = ptr;
244
245 //printf ("DECODE: %d.\n", len);
246 return len;
247 }
248
249 /*
250 * mono_aot_get_method:
251 *
252 * Decode an offset table emitted by emit_offset_table (), returning the INDEXth
253 * entry.
254 */
255 static guint32
256 mono_aot_get_offset (guint32 *table, int index)
257 {
258 int i, group, ngroups, index_entry_size;
259 int start_offset, offset, noffsets, group_size;
260 guint8 *data_start, *p;
261 guint32 *index32 = NULL;
262 guint16 *index16 = NULL;
263
264 noffsets = table [0];
265 group_size = table [1];
266 ngroups = table [2];
267 index_entry_size = table [3];
268 group = index / group_size;
269
270 if (index_entry_size == 2) {
271 index16 = (guint16*)&table [4];
272 data_start = (guint8*)&index16 [ngroups];
273 p = data_start + index16 [group];
274 } else {
275 index32 = (guint32*)&table [4];
276 data_start = (guint8*)&index32 [ngroups];
277 p = data_start + index32 [group];
278 }
279
280 /* offset will contain the value of offsets [group * group_size] */
281 offset = start_offset = decode_value (p, &p);
282 for (i = group * group_size + 1; i <= index; ++i) {
283 offset += decode_value (p, &p);
284 }
285
286 //printf ("Offset lookup: %d -> %d, start=%d, p=%d\n", index, offset, start_offset, table [3 + group]);
287
288 return offset;
289 }
290
291 static MonoMethod*
292 decode_method_ref_2 (MonoAotModule *module, guint8 *buf, guint8 **endbuf);
293
294 static MonoClass*
295 decode_klass_ref (MonoAotModule *module, guint8 *buf, guint8 **endbuf);
296
297 static MonoGenericInst*
298 decode_generic_inst (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
299 {
300 int type_argc, i;
301 MonoType **type_argv;
302 MonoGenericInst *inst;
303 guint8 *p = buf;
304
305 type_argc = decode_value (p, &p);
306 type_argv = g_new0 (MonoType*, type_argc);
307
308 for (i = 0; i < type_argc; ++i) {
309 MonoClass *pclass = decode_klass_ref (module, p, &p);
310 if (!pclass) {
311 g_free (type_argv);
312 return NULL;
313 }
314 type_argv [i] = &pclass->byval_arg;
315 }
316
317 inst = mono_metadata_get_generic_inst (type_argc, type_argv);
318 g_free (type_argv);
319
320 *endbuf = p;
321
322 return inst;
323 }
324
325 static gboolean
326 decode_generic_context (MonoAotModule *module, MonoGenericContext *ctx, guint8 *buf, guint8 **endbuf)
327 {
328 gboolean has_class_inst, has_method_inst;
329 guint8 *p = buf;
330
331 has_class_inst = decode_value (p, &p);
332 if (has_class_inst) {
333 ctx->class_inst = decode_generic_inst (module, p, &p);
334 if (!ctx->class_inst)
335 return FALSE;
336 }
337 has_method_inst = decode_value (p, &p);
338 if (has_method_inst) {
339 ctx->method_inst = decode_generic_inst (module, p, &p);
340 if (!ctx->method_inst)
341 return FALSE;
342 }
343
344 *endbuf = p;
345 return TRUE;
346 }
347
348 static MonoClass*
349 decode_klass_ref (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
350 {
351 MonoImage *image;
352 MonoClass *klass, *eklass;
353 guint32 token, rank;
354 guint8 *p = buf;
355
356 token = decode_value (p, &p);
357 if (token == 0) {
358 *endbuf = p;
359 return NULL;
360 }
361 if (mono_metadata_token_table (token) == 0) {
362 image = load_image (module, decode_value (p, &p), TRUE);
363 if (!image)
364 return NULL;
365 klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF + token);
366 } else if (mono_metadata_token_table (token) == MONO_TABLE_TYPESPEC) {
367 if (token == MONO_TOKEN_TYPE_SPEC) {
368 MonoTypeEnum type = decode_value (p, &p);
369
370 if (type == MONO_TYPE_GENERICINST) {
371 MonoClass *gclass;
372 MonoGenericContext ctx;
373 MonoType *type;
374
375 gclass = decode_klass_ref (module, p, &p);
376 if (!gclass)
377 return NULL;
378 g_assert (gclass->generic_container);
379
380 memset (&ctx, 0, sizeof (ctx));
381 ctx.class_inst = decode_generic_inst (module, p, &p);
382 if (!ctx.class_inst)
383 return NULL;
384 type = mono_class_inflate_generic_type (&gclass->byval_arg, &ctx);
385 klass = mono_class_from_mono_type (type);
386 mono_metadata_free_type (type);
387 } else if ((type == MONO_TYPE_VAR) || (type == MONO_TYPE_MVAR)) {
388 MonoType *t;
389 MonoGenericContainer *container;
390
391 int num = decode_value (p, &p);
392 gboolean is_method = decode_value (p, &p);
393
394 if (is_method) {
395 MonoMethod *method_def;
396 g_assert (type == MONO_TYPE_MVAR);
397 method_def = decode_method_ref_2 (module, p, &p);
398 if (!method_def)
399 return NULL;
400
401 container = mono_method_get_generic_container (method_def);
402 } else {
403 MonoClass *class_def;
404 g_assert (type == MONO_TYPE_VAR);
405 class_def = decode_klass_ref (module, p, &p);
406 if (!class_def)
407 return NULL;
408
409 container = class_def->generic_container;
410 }
411
412 g_assert (container);
413
414 // FIXME: Memory management
415 t = g_new0 (MonoType, 1);
416 t->type = type;
417 t->data.generic_param = mono_generic_container_get_param (container, num);
418
419 // FIXME: Maybe use types directly to avoid
420 // the overhead of creating MonoClass-es
421 klass = mono_class_from_mono_type (t);
422
423 g_free (t);
424 } else {
425 g_assert_not_reached ();
426 }
427 } else {
428 image = load_image (module, decode_value (p, &p), TRUE);
429 if (!image)
430 return NULL;
431 klass = mono_class_get (image, token);
432 }
433 } else if (token == MONO_TOKEN_TYPE_DEF) {
434 /* Array */
435 image = load_image (module, decode_value (p, &p), TRUE);
436 if (!image)
437 return NULL;
438 rank = decode_value (p, &p);
439 eklass = decode_klass_ref (module, p, &p);
440 klass = mono_array_class_get (eklass, rank);
441 } else {
442 g_assert_not_reached ();
443 }
444 g_assert (klass);
445
446 *endbuf = p;
447 return klass;
448 }
449
450 static MonoClassField*
451 decode_field_info (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
452 {
453 MonoClass *klass = decode_klass_ref (module, buf, &buf);
454 guint32 token;
455 guint8 *p = buf;
456
457 if (!klass)
458 return NULL;
459
460 token = MONO_TOKEN_FIELD_DEF + decode_value (p, &p);
461
462 *endbuf = p;
463
464 return mono_class_get_field (klass, token);
465 }
466
467 /*
468 * can_method_ref_match_method:
469 *
470 * Determine if calling decode_method_ref_2 on P could return the same method as
471 * METHOD. This is an optimization to avoid calling decode_method_ref_2 () which
472 * would create MonoMethods which are not needed etc.
473 */
474 static gboolean
475 can_method_ref_match_method (MonoAotModule *module, guint8 *buf, MonoMethod *method)
476 {
477 guint8 *p = buf;
478 guint32 image_index, value;
479
480 /* Keep this in sync with decode_method_ref () */
481 value = decode_value (p, &p);
482 image_index = value >> 24;
483
484 if (image_index == MONO_AOT_METHODREF_WRAPPER) {
485 guint32 wrapper_type;
486
487 if (!method->wrapper_type)
488 return FALSE;
489
490 wrapper_type = decode_value (p, &p);
491
492 if (method->wrapper_type != wrapper_type)
493 return FALSE;
494 } else if (image_index == MONO_AOT_METHODREF_WRAPPER_NAME) {
495 return FALSE;
496 } else if (image_index < MONO_AOT_METHODREF_MIN || image_index == MONO_AOT_METHODREF_METHODSPEC || image_index == MONO_AOT_METHODREF_GINST) {
497 if (method->wrapper_type)
498 return FALSE;
499 }
500
501 return TRUE;
502 }
503
504 /*
505 * decode_method_ref:
506 *
507 * Decode a method reference, and return its image and token. This avoids loading
508 * metadata for the method if the caller does not need it. If the method has no token,
509 * then it is loaded from metadata and METHOD is set to the method instance.
510 */
511 static MonoImage*
512 decode_method_ref (MonoAotModule *module, guint32 *token, MonoMethod **method, gboolean *no_aot_trampoline, guint8 *buf, guint8 **endbuf)
513 {
514 guint32 image_index, value;
515 MonoImage *image = NULL;
516 guint8 *p = buf;
517
518 if (method)
519 *method = NULL;
520 if (no_aot_trampoline)
521 *no_aot_trampoline = FALSE;
522
523 value = decode_value (p, &p);
524 image_index = value >> 24;
525
526 if (image_index == MONO_AOT_METHODREF_NO_AOT_TRAMPOLINE) {
527 if (no_aot_trampoline)
528 *no_aot_trampoline = TRUE;
529 value = decode_value (p, &p);
530 image_index = value >> 24;
531 }
532
533 if (image_index == MONO_AOT_METHODREF_WRAPPER) {
534 guint32 wrapper_type;
535
536 wrapper_type = decode_value (p, &p);
537
538 /* Doesn't matter */
539 image = mono_defaults.corlib;
540
541 switch (wrapper_type) {
542 case MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK: {
543 MonoMethod *m = decode_method_ref_2 (module, p, &p);
544
545 if (!m)
546 return NULL;
547 mono_class_init (m->klass);
548 *method = mono_marshal_get_remoting_invoke_with_check (m);
549 break;
550 }
551 case MONO_WRAPPER_PROXY_ISINST: {
552 MonoClass *klass = decode_klass_ref (module, p, &p);
553 if (!klass)
554 return NULL;
555 *method = mono_marshal_get_proxy_cancast (klass);
556 break;
557 }
558 case MONO_WRAPPER_LDFLD:
559 case MONO_WRAPPER_LDFLDA:
560 case MONO_WRAPPER_STFLD:
561 case MONO_WRAPPER_ISINST: {
562 MonoClass *klass = decode_klass_ref (module, p, &p);
563 if (!klass)
564 return NULL;
565 if (wrapper_type == MONO_WRAPPER_LDFLD)
566 *method = mono_marshal_get_ldfld_wrapper (&klass->byval_arg);
567 else if (wrapper_type == MONO_WRAPPER_LDFLDA)
568 *method = mono_marshal_get_ldflda_wrapper (&klass->byval_arg);
569 else if (wrapper_type == MONO_WRAPPER_STFLD)
570 *method = mono_marshal_get_stfld_wrapper (&klass->byval_arg);
571 else if (wrapper_type == MONO_WRAPPER_ISINST)
572 *method = mono_marshal_get_isinst (klass);
573 else
574 g_assert_not_reached ();
575 break;
576 }
577 case MONO_WRAPPER_LDFLD_REMOTE:
578 *method = mono_marshal_get_ldfld_remote_wrapper (NULL);
579 break;
580 case MONO_WRAPPER_STFLD_REMOTE:
581 *method = mono_marshal_get_stfld_remote_wrapper (NULL);
582 break;
583 case MONO_WRAPPER_ALLOC: {
584 int atype = decode_value (p, &p);
585
586 *method = mono_gc_get_managed_allocator_by_type (atype);
587 break;
588 }
589 case MONO_WRAPPER_WRITE_BARRIER:
590 *method = mono_gc_get_write_barrier ();
591 break;
592 case MONO_WRAPPER_STELEMREF:
593 *method = mono_marshal_get_stelemref ();
594 break;
595 case MONO_WRAPPER_SYNCHRONIZED: {
596 MonoMethod *m = decode_method_ref_2 (module, p, &p);
597
598 if (!m)
599 return NULL;
600 *method = mono_marshal_get_synchronized_wrapper (m);
601 break;
602 }
603 case MONO_WRAPPER_UNKNOWN: {
604 MonoMethodDesc *desc;
605 MonoMethod *orig_method;
606 int subtype = decode_value (p, &p);
607
608 if (subtype == MONO_AOT_WRAPPER_MONO_ENTER)
609 desc = mono_method_desc_new ("Monitor:Enter", FALSE);
610 else if (subtype == MONO_AOT_WRAPPER_MONO_EXIT)
611 desc = mono_method_desc_new ("Monitor:Exit", FALSE);
612 else
613 g_assert_not_reached ();
614 orig_method = mono_method_desc_search_in_class (desc, mono_defaults.monitor_class);
615 g_assert (orig_method);
616 mono_method_desc_free (desc);
617 *method = mono_monitor_get_fast_path (orig_method);
618 break;
619 }
620 case MONO_WRAPPER_RUNTIME_INVOKE: {
621 /* Direct wrapper */
622 MonoMethod *m = decode_method_ref_2 (module, p, &p);
623
624 if (!m)
625 return NULL;
626 *method = mono_marshal_get_runtime_invoke (m, FALSE);
627 break;
628 }
629 case MONO_WRAPPER_MANAGED_TO_MANAGED: {
630 int subtype = decode_value (p, &p);
631
632 if (subtype == MONO_AOT_WRAPPER_ELEMENT_ADDR) {
633 int rank = decode_value (p, &p);
634 int elem_size = decode_value (p, &p);
635
636 *method = mono_marshal_get_array_address (rank, elem_size);
637 } else {
638 g_assert_not_reached ();
639 }
640 break;
641 }
642 default:
643 g_assert_not_reached ();
644 }
645 } else if (image_index == MONO_AOT_METHODREF_WRAPPER_NAME) {
646 /* Can't decode these */
647 g_assert_not_reached ();
648 } else if (image_index == MONO_AOT_METHODREF_METHODSPEC) {
649 image_index = decode_value (p, &p);
650 *token = decode_value (p, &p);
651
652 image = load_image (module, image_index, TRUE);
653 if (!image)
654 return NULL;
655 } else if (image_index == MONO_AOT_METHODREF_GINST) {
656 MonoClass *klass;
657 MonoGenericContext ctx;
658
659 /*
660 * These methods do not have a token which resolves them, so we
661 * resolve them immediately.
662 */
663 klass = decode_klass_ref (module, p, &p);
664 if (!klass)
665 return NULL;
666
667 image_index = decode_value (p, &p);
668 *token = decode_value (p, &p);
669
670 image = load_image (module, image_index, TRUE);
671 if (!image)
672 return NULL;
673
674 *method = mono_get_method_full (image, *token, NULL, NULL);
675 if (!(*method))
676 return NULL;
677
678 memset (&ctx, 0, sizeof (ctx));
679
680 if (FALSE && klass->generic_class) {
681 ctx.class_inst = klass->generic_class->context.class_inst;
682 ctx.method_inst = NULL;
683
684 *method = mono_class_inflate_generic_method_full (*method, klass, &ctx);
685 }
686
687 memset (&ctx, 0, sizeof (ctx));
688
689 if (!decode_generic_context (module, &ctx, p, &p))
690 return NULL;
691
692 *method = mono_class_inflate_generic_method_full (*method, klass, &ctx);
693 } else if (image_index == MONO_AOT_METHODREF_ARRAY) {
694 MonoClass *klass;
695 int method_type;
696
697 klass = decode_klass_ref (module, p, &p);
698 if (!klass)
699 return NULL;
700 method_type = decode_value (p, &p);
701 *token = 0;
702 switch (method_type) {
703 case 0:
704 *method = mono_class_get_method_from_name (klass, ".ctor", klass->rank);
705 break;
706 case 1:
707 *method = mono_class_get_method_from_name (klass, ".ctor", klass->rank * 2);
708 break;
709 case 2:
710 *method = mono_class_get_method_from_name (klass, "Get", -1);
711 break;
712 case 3:
713 *method = mono_class_get_method_from_name (klass, "Address", -1);
714 break;
715 case 4:
716 *method = mono_class_get_method_from_name (klass, "Set", -1);
717 break;
718 default:
719 g_assert_not_reached ();
720 }
721 } else {
722 g_assert (image_index < MONO_AOT_METHODREF_MIN);
723 *token = MONO_TOKEN_METHOD_DEF | (value & 0xffffff);
724
725 image = load_image (module, image_index, TRUE);
726 if (!image)
727 return NULL;
728 }
729
730 *endbuf = p;
731
732 return image;
733 }
734
735 /*
736 * decode_method_ref_2:
737 *
738 * Similar to decode_method_ref, but resolve and return the method itself.
739 */
740 static MonoMethod*
741 decode_method_ref_2 (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
742 {
743 MonoMethod *method;
744 guint32 token;
745 MonoImage *image = decode_method_ref (module, &token, &method, NULL, buf, endbuf);
746
747 if (method)
748 return method;
749 if (!image)
750 return NULL;
751 method = mono_get_method (image, token, NULL);
752 return method;
753 }
754
755 G_GNUC_UNUSED
756 static void
757 make_writable (guint8* addr, guint32 len)
758 {
759 guint8 *page_start;
760 int pages, err;
761
762 if (mono_aot_only)
763 g_error ("Attempt to make AOT memory writable while running in aot-only mode.\n");
764
765 page_start = (guint8 *) (((gssize) (addr)) & ~ (mono_pagesize () - 1));
766 pages = (addr + len - page_start + mono_pagesize () - 1) / mono_pagesize ();
767
768 err = mono_mprotect (page_start, pages * mono_pagesize (), MONO_MMAP_READ | MONO_MMAP_WRITE | MONO_MMAP_EXEC);
769 g_assert (err == 0);
770 }
771
772 static void
773 create_cache_structure (void)
774 {
775 const char *home;
776 char *tmp;
777 int err;
778
779 home = g_get_home_dir ();
780 if (!home)
781 return;
782
783 tmp = g_build_filename (home, ".mono", NULL);
784 if (!g_file_test (tmp, G_FILE_TEST_IS_DIR)) {
785 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT creating directory %s", tmp);
786 #ifdef HOST_WIN32
787 err = mkdir (tmp);
788 #else
789 err = mkdir (tmp, 0777);
790 #endif
791 if (err) {
792 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT failed: %s", g_strerror (errno));
793 g_free (tmp);
794 return;
795 }
796 }
797 g_free (tmp);
798 tmp = g_build_filename (home, ".mono", "aot-cache", NULL);
799 if (!g_file_test (tmp, G_FILE_TEST_IS_DIR)) {
800 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT creating directory %s", tmp);
801 #ifdef HOST_WIN32
802 err = mkdir (tmp);
803 #else
804 err = mkdir (tmp, 0777);
805 #endif
806 if (err) {
807 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT failed: %s", g_strerror (errno));
808 g_free (tmp);
809 return;
810 }
811 }
812 g_free (tmp);
813 }
814
815 /*
816 * load_aot_module_from_cache:
817 *
818 * Experimental code to AOT compile loaded assemblies on demand.
819 *
820 * FIXME:
821 * - Add environment variable MONO_AOT_CACHE_OPTIONS
822 * - Add options for controlling the cache size
823 * - Handle full cache by deleting old assemblies lru style
824 * - Add options for excluding assemblies during development
825 * - Maybe add a threshold after an assembly is AOT compiled
826 * - invoking a new mono process is a security risk
827 * - recompile the AOT module if one of its dependencies changes
828 */
829 static MonoDl*
830 load_aot_module_from_cache (MonoAssembly *assembly, char **aot_name)
831 {
832 char *fname, *cmd, *tmp2, *aot_options;
833 const char *home;
834 MonoDl *module;
835 gboolean res;
836 gchar *out, *err;
837 gint exit_status;
838
839 *aot_name = NULL;
840
841 if (assembly->image->dynamic)
842 return NULL;
843
844 create_cache_structure ();
845
846 home = g_get_home_dir ();
847
848 tmp2 = g_strdup_printf ("%s-%s%s", assembly->image->assembly_name, assembly->image->guid, SHARED_EXT);
849 fname = g_build_filename (home, ".mono", "aot-cache", tmp2, NULL);
850 *aot_name = fname;
851 g_free (tmp2);
852
853 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT trying to load from cache: '%s'.", fname);
854 module = mono_dl_open (fname, MONO_DL_LAZY, NULL);
855
856 if (!module) {
857 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT not found.");
858
859 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT precompiling assembly '%s'... ", assembly->image->name);
860
861 aot_options = g_strdup_printf ("outfile=%s", fname);
862
863 if (spawn_compiler) {
864 /* FIXME: security */
865 /* FIXME: Has to pass the assembly loading path to the child process */
866 cmd = g_strdup_printf ("mono -O=all --aot=%s %s", aot_options, assembly->image->name);
867
868 res = g_spawn_command_line_sync (cmd, &out, &err, &exit_status, NULL);
869
870 #if !defined(HOST_WIN32) && !defined(__ppc__) && !defined(__ppc64__) && !defined(__powerpc__)
871 if (res) {
872 if (!WIFEXITED (exit_status) && (WEXITSTATUS (exit_status) == 0))
873 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT failed: %s.", err);
874 else
875 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT succeeded.");
876 g_free (out);
877 g_free (err);
878 }
879 #endif
880 g_free (cmd);
881 } else {
882 res = mono_compile_assembly (assembly, mono_parse_default_optimizations (NULL), aot_options);
883 if (!res) {
884 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT failed.");
885 } else {
886 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT succeeded.");
887 }
888 }
889
890 module = mono_dl_open (fname, MONO_DL_LAZY, NULL);
891
892 g_free (aot_options);
893 }
894
895 return module;
896 }
897
898 static void
899 find_symbol (MonoDl *module, gpointer *globals, const char *name, gpointer *value)
900 {
901 if (globals) {
902 int global_index;
903 guint16 *table, *entry;
904 guint16 table_size;
905 guint32 hash;
906
907 /* The first entry points to the hash */
908 table = globals [0];
909 globals ++;
910
911 table_size = table [0];
912 table ++;
913
914 hash = mono_metadata_str_hash (name) % table_size;
915
916 entry = &table [hash * 2];
917
918 /* Search the hash for the index into the globals table */
919 global_index = -1;
920 while (entry [0] != 0) {
921 guint32 index = entry [0] - 1;
922 guint32 next = entry [1];
923
924 //printf ("X: %s %s\n", (char*)globals [index * 2], name);
925
926 if (!strcmp (globals [index * 2], name)) {
927 global_index = index;
928 break;
929 }
930
931 if (next != 0) {
932 entry = &table [next * 2];
933 } else {
934 break;
935 }
936 }
937
938 if (global_index != -1)
939 *value = globals [global_index * 2 + 1];
940 else
941 *value = NULL;
942 } else {
943 mono_dl_symbol (module, name, value);
944 }
945 }
946
947 #ifndef SHT_ARM_EXIDX
948 #define SHT_ARM_EXIDX 0x70000001
949 #endif
950
951 #ifdef HAVE_DL_ITERATE_PHDR
952 static int
953 dl_callback (struct dl_phdr_info *info, size_t size, void *data)
954 {
955 int j;
956 MonoAotModule *amodule = data;
957
958 if (!strcmp (amodule->aot_name, info->dlpi_name)) {
959 for (j = 0; j < info->dlpi_phnum; j++) {
960 if (info->dlpi_phdr [j].p_type == PT_GNU_EH_FRAME)
961 amodule->eh_frame_hdr = (guint8*)(info->dlpi_addr + info->dlpi_phdr [j].p_vaddr);
962 if (info->dlpi_phdr [j].p_type == SHT_ARM_EXIDX) {
963 amodule->arm_exidx = (guint8*)(info->dlpi_addr + info->dlpi_phdr [j].p_vaddr);
964 amodule->arm_exidx_size = info->dlpi_phdr [j].p_filesz;
965 }
966 }
967 return 1;
968 } else {
969 return 0;
970 }
971 }
972 #endif
973
974 static void
975 load_aot_module (MonoAssembly *assembly, gpointer user_data)
976 {
977 char *aot_name;
978 MonoAotModule *amodule;
979 MonoDl *sofile;
980 gboolean usable = TRUE;
981 char *saved_guid = NULL;
982 char *aot_version = NULL;
983 char *runtime_version, *build_info;
984 char *opt_flags = NULL;
985 gpointer *globals;
986 gboolean full_aot = FALSE;
987 MonoAotFileInfo *file_info = NULL;
988 int i;
989 gpointer *got_addr;
990
991 if (mono_compile_aot)
992 return;
993
994 if (assembly->image->aot_module)
995 /*
996 * Already loaded. This can happen because the assembly loading code might invoke
997 * the assembly load hooks multiple times for the same assembly.
998 */
999 return;
1000
1001 if (assembly->image->dynamic)
1002 return;
1003
1004 if (mono_security_get_mode () == MONO_SECURITY_MODE_CAS)
1005 return;
1006
1007 mono_aot_lock ();
1008 if (static_aot_modules)
1009 globals = g_hash_table_lookup (static_aot_modules, assembly->aname.name);
1010 else
1011 globals = NULL;
1012 mono_aot_unlock ();
1013
1014 if (globals) {
1015 /* Statically linked AOT module */
1016 sofile = NULL;
1017 aot_name = g_strdup_printf ("%s", assembly->aname.name);
1018 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "Found statically linked AOT module '%s'.\n", aot_name);
1019 } else {
1020 if (use_aot_cache)
1021 sofile = load_aot_module_from_cache (assembly, &aot_name);
1022 else {
1023 char *err;
1024 aot_name = g_strdup_printf ("%s%s", assembly->image->name, SHARED_EXT);
1025
1026 sofile = mono_dl_open (aot_name, MONO_DL_LAZY, &err);
1027
1028 if (!sofile) {
1029 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT failed to load AOT module %s: %s\n", aot_name, err);
1030 g_free (err);
1031 }
1032 }
1033 }
1034
1035 if (!sofile && !globals) {
1036 if (mono_aot_only) {
1037 fprintf (stderr, "Failed to load AOT module '%s' in aot-only mode.\n", aot_name);
1038 exit (1);
1039 }
1040 g_free (aot_name);
1041 return;
1042 }
1043
1044 find_symbol (sofile, globals, "mono_assembly_guid", (gpointer *) &saved_guid);
1045 find_symbol (sofile, globals, "mono_aot_version", (gpointer *) &aot_version);
1046 find_symbol (sofile, globals, "mono_aot_opt_flags", (gpointer *)&opt_flags);
1047 find_symbol (sofile, globals, "mono_runtime_version", (gpointer *)&runtime_version);
1048 find_symbol (sofile, globals, "mono_aot_got_addr", (gpointer *)&got_addr);
1049
1050 if (!aot_version || strcmp (aot_version, MONO_AOT_FILE_VERSION)) {
1051 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s has wrong file format version (expected %s got %s)\n", aot_name, MONO_AOT_FILE_VERSION, aot_version);
1052 usable = FALSE;
1053 }
1054 else {
1055 if (!saved_guid || strcmp (assembly->image->guid, saved_guid)) {
1056 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s is out of date.\n", aot_name);
1057 usable = FALSE;
1058 }
1059 }
1060
1061 build_info = mono_get_runtime_build_info ();
1062 if (!runtime_version || ((strlen (runtime_version) > 0 && strcmp (runtime_version, build_info)))) {
1063 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s is compiled against runtime version '%s' while this runtime has version '%s'.\n", aot_name, runtime_version, build_info);
1064 usable = FALSE;
1065 }
1066 g_free (build_info);
1067
1068 find_symbol (sofile, globals, "mono_aot_file_info", (gpointer*)&file_info);
1069 g_assert (file_info);
1070
1071 full_aot = ((MonoAotFileInfo*)file_info)->flags & MONO_AOT_FILE_FLAG_FULL_AOT;
1072
1073 if (mono_aot_only && !full_aot) {
1074 fprintf (stderr, "Can't use AOT image '%s' in aot-only mode because it is not compiled with --aot=full.\n", aot_name);
1075 exit (1);
1076 }
1077 if (!mono_aot_only && full_aot) {
1078 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s is compiled with --aot=full.\n", aot_name);
1079 usable = FALSE;
1080 }
1081
1082 if ((((MonoAotFileInfo*)file_info)->flags & MONO_AOT_FILE_FLAG_WITH_LLVM) && !mono_use_llvm) {
1083 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s is compiled with LLVM.\n", aot_name);
1084 usable = FALSE;
1085 }
1086
1087 if (!usable) {
1088 if (mono_aot_only) {
1089 fprintf (stderr, "Failed to load AOT module '%s' while running in aot-only mode.\n", aot_name);
1090 exit (1);
1091 }
1092 g_free (aot_name);
1093 if (sofile)
1094 mono_dl_close (sofile);
1095 assembly->image->aot_module = NULL;
1096 return;
1097 }
1098
1099 amodule = g_new0 (MonoAotModule, 1);
1100 amodule->aot_name = aot_name;
1101 amodule->assembly = assembly;
1102
1103 memcpy (&amodule->info, file_info, sizeof (*file_info));
1104
1105 amodule->got = *got_addr;
1106 amodule->got [0] = assembly->image;
1107 amodule->globals = globals;
1108 amodule->sofile = sofile;
1109 amodule->method_to_code = g_hash_table_new (mono_aligned_addr_hash, NULL);
1110
1111 /* Read image table */
1112 {
1113 guint32 table_len, i;
1114 char *table = NULL;
1115
1116 find_symbol (sofile, globals, "mono_image_table", (gpointer *)&table);
1117 g_assert (table);
1118
1119 table_len = *(guint32*)table;
1120 table += sizeof (guint32);
1121 amodule->image_table = g_new0 (MonoImage*, table_len);
1122 amodule->image_names = g_new0 (MonoAssemblyName, table_len);
1123 amodule->image_guids = g_new0 (char*, table_len);
1124 amodule->image_table_len = table_len;
1125 for (i = 0; i < table_len; ++i) {
1126 MonoAssemblyName *aname = &(amodule->image_names [i]);
1127
1128 aname->name = g_strdup (table);
1129 table += strlen (table) + 1;
1130 amodule->image_guids [i] = g_strdup (table);
1131 table += strlen (table) + 1;
1132 if (table [0] != 0)
1133 aname->culture = g_strdup (table);
1134 table += strlen (table) + 1;
1135 memcpy (aname->public_key_token, table, strlen (table) + 1);
1136 table += strlen (table) + 1;
1137
1138 table = ALIGN_PTR_TO (table, 8);
1139 aname->flags = *(guint32*)table;
1140 table += 4;
1141 aname->major = *(guint32*)table;
1142 table += 4;
1143 aname->minor = *(guint32*)table;
1144 table += 4;
1145 aname->build = *(guint32*)table;
1146 table += 4;
1147 aname->revision = *(guint32*)table;
1148 table += 4;
1149 }
1150 }
1151
1152 /* Read method and method_info tables */
1153 find_symbol (sofile, globals, "code_offsets", (gpointer*)&amodule->code_offsets);
1154 find_symbol (sofile, globals, "methods", (gpointer*)&amodule->code);
1155 find_symbol (sofile, globals, "methods_end", (gpointer*)&amodule->code_end);
1156 find_symbol (sofile, globals, "method_info_offsets", (gpointer*)&amodule->method_info_offsets);
1157 find_symbol (sofile, globals, "ex_info_offsets", (gpointer*)&amodule->ex_info_offsets);
1158 find_symbol (sofile, globals, "blob", (gpointer*)&amodule->blob);
1159 find_symbol (sofile, globals, "class_info_offsets", (gpointer*)&amodule->class_info_offsets);
1160 find_symbol (sofile, globals, "class_name_table", (gpointer *)&amodule->class_name_table);
1161 find_symbol (sofile, globals, "extra_method_table", (gpointer *)&amodule->extra_method_table);
1162 find_symbol (sofile, globals, "extra_method_info_offsets", (gpointer *)&amodule->extra_method_info_offsets);
1163 find_symbol (sofile, globals, "got_info_offsets", (gpointer*)&amodule->got_info_offsets);
1164 find_symbol (sofile, globals, "specific_trampolines", (gpointer*)&(amodule->trampolines [MONO_AOT_TRAMP_SPECIFIC]));
1165 find_symbol (sofile, globals, "static_rgctx_trampolines", (gpointer*)&(amodule->trampolines [MONO_AOT_TRAMP_STATIC_RGCTX]));
1166 find_symbol (sofile, globals, "imt_thunks", (gpointer*)&(amodule->trampolines [MONO_AOT_TRAMP_IMT_THUNK]));
1167 find_symbol (sofile, globals, "unwind_info", (gpointer)&amodule->unwind_info);
1168 find_symbol (sofile, globals, "mem_end", (gpointer*)&amodule->mem_end);
1169
1170 amodule->mem_begin = amodule->code;
1171
1172 find_symbol (sofile, globals, "plt", (gpointer*)&amodule->plt);
1173 find_symbol (sofile, globals, "plt_end", (gpointer*)&amodule->plt_end);
1174
1175 if (make_unreadable) {
1176 #ifndef TARGET_WIN32
1177 guint8 *addr;
1178 guint8 *page_start;
1179 int pages, err, len;
1180
1181 addr = amodule->mem_begin;
1182 len = amodule->mem_end - amodule->mem_begin;
1183
1184 /* Round down in both directions to avoid modifying data which is not ours */
1185 page_start = (guint8 *) (((gssize) (addr)) & ~ (mono_pagesize () - 1)) + mono_pagesize ();
1186 pages = ((addr + len - page_start + mono_pagesize () - 1) / mono_pagesize ()) - 1;
1187 err = mono_mprotect (page_start, pages * mono_pagesize (), MONO_MMAP_NONE);
1188 g_assert (err == 0);
1189 #endif
1190 }
1191
1192 mono_aot_lock ();
1193
1194 aot_code_low_addr = MIN (aot_code_low_addr, (gsize)amodule->code);
1195 aot_code_high_addr = MAX (aot_code_high_addr, (gsize)amodule->code_end);
1196
1197 g_hash_table_insert (aot_modules, assembly, amodule);
1198 mono_aot_unlock ();
1199
1200 mono_jit_info_add_aot_module (assembly->image, amodule->code, amodule->code_end);
1201
1202 assembly->image->aot_module = amodule;
1203
1204 #ifdef HAVE_DL_ITERATE_PHDR
1205 /* Lookup the address of the .eh_frame_hdr () section if available */
1206 dl_iterate_phdr (dl_callback, amodule);
1207 #endif
1208
1209 if (mono_aot_only) {
1210 if (mono_defaults.corlib) {
1211 /* The second got slot contains the mscorlib got addr */
1212 MonoAotModule *mscorlib_amodule = mono_defaults.corlib->aot_module;
1213
1214 amodule->got [1] = mscorlib_amodule->got;
1215 } else {
1216 amodule->got [1] = amodule->got;
1217 }
1218 }
1219
1220 /*
1221 * Since we store methoddef and classdef tokens when referring to methods/classes in
1222 * referenced assemblies, we depend on the exact versions of the referenced assemblies.
1223 * MS calls this 'hard binding'. This means we have to load all referenced assemblies
1224 * non-lazily, since we can't handle out-of-date errors later.
1225 * The cached class info also depends on the exact assemblies.
1226 */
1227 for (i = 0; i < amodule->image_table_len; ++i)
1228 load_image (amodule, i, FALSE);
1229
1230 if (amodule->out_of_date) {
1231 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT Module %s is unusable because a dependency is out-of-date.\n", assembly->image->name);
1232 if (mono_aot_only) {
1233 fprintf (stderr, "Failed to load AOT module '%s' while running in aot-only mode because a dependency cannot be found or it is out of date.\n", aot_name);
1234 exit (1);
1235 }
1236 }
1237 else
1238 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT loaded AOT Module for %s.\n", assembly->image->name);
1239 }
1240
1241 /*
1242 * mono_aot_register_globals:
1243 *
1244 * This is called by the ctor function in AOT images compiled with the
1245 * 'no-dlsym' option.
1246 */
1247 void
1248 mono_aot_register_globals (gpointer *globals)
1249 {
1250 g_assert_not_reached ();
1251 }
1252
1253 /*
1254 * mono_aot_register_module:
1255 *
1256 * This should be called by embedding code to register AOT modules statically linked
1257 * into the executable. AOT_INFO should be the value of the
1258 * 'mono_aot_module_<ASSEMBLY_NAME>_info' global symbol from the AOT module.
1259 */
1260 void
1261 mono_aot_register_module (gpointer *aot_info)
1262 {
1263 gpointer *globals;
1264 char *aname;
1265
1266 globals = aot_info;
1267 g_assert (globals);
1268
1269 /* Determine the assembly name */
1270 find_symbol (NULL, globals, "mono_aot_assembly_name", (gpointer*)&aname);
1271 g_assert (aname);
1272
1273 /* This could be called before startup */
1274 if (aot_modules)
1275 mono_aot_lock ();
1276
1277 if (!static_aot_modules)
1278 static_aot_modules = g_hash_table_new (g_str_hash, g_str_equal);
1279
1280 g_hash_table_insert (static_aot_modules, aname, globals);
1281
1282 if (aot_modules)
1283 mono_aot_unlock ();
1284 }
1285
1286 void
1287 mono_aot_init (void)
1288 {
1289 InitializeCriticalSection (&aot_mutex);
1290 aot_modules = g_hash_table_new (NULL, NULL);
1291
1292 mono_install_assembly_load_hook (load_aot_module, NULL);
1293
1294 if (g_getenv ("MONO_LASTAOT"))
1295 mono_last_aot_method = atoi (g_getenv ("MONO_LASTAOT"));
1296 if (g_getenv ("MONO_AOT_CACHE"))
1297 use_aot_cache = TRUE;
1298 }
1299
1300 static gboolean
1301 decode_cached_class_info (MonoAotModule *module, MonoCachedClassInfo *info, guint8 *buf, guint8 **endbuf)
1302 {
1303 guint32 flags;
1304
1305 info->vtable_size = decode_value (buf, &buf);
1306 if (info->vtable_size == -1)
1307 /* Generic type */
1308 return FALSE;
1309 flags = decode_value (buf, &buf);
1310 info->ghcimpl = (flags >> 0) & 0x1;
1311 info->has_finalize = (flags >> 1) & 0x1;
1312 info->has_cctor = (flags >> 2) & 0x1;
1313 info->has_nested_classes = (flags >> 3) & 0x1;
1314 info->blittable = (flags >> 4) & 0x1;
1315 info->has_references = (flags >> 5) & 0x1;
1316 info->has_static_refs = (flags >> 6) & 0x1;
1317 info->no_special_static_fields = (flags >> 7) & 0x1;
1318 info->is_generic_container = (flags >> 8) & 0x1;
1319
1320 if (info->has_cctor) {
1321 MonoImage *cctor_image = decode_method_ref (module, &info->cctor_token, NULL, NULL, buf, &buf);
1322 if (!cctor_image)
1323 return FALSE;
1324 }
1325 if (info->has_finalize) {
1326 info->finalize_image = decode_method_ref (module, &info->finalize_token, NULL, NULL, buf, &buf);
1327 if (!info->finalize_image)
1328 return FALSE;
1329 }
1330
1331 info->instance_size = decode_value (buf, &buf);
1332 info->class_size = decode_value (buf, &buf);
1333 info->packing_size = decode_value (buf, &buf);
1334 info->min_align = decode_value (buf, &buf);
1335
1336 *endbuf = buf;
1337
1338 return TRUE;
1339 }
1340
1341 gpointer
1342 mono_aot_get_method_from_vt_slot (MonoDomain *domain, MonoVTable *vtable, int slot)
1343 {
1344 int i;
1345 MonoClass *klass = vtable->klass;
1346 MonoAotModule *aot_module = klass->image->aot_module;
1347 guint8 *info, *p;
1348 MonoCachedClassInfo class_info;
1349 gboolean err;
1350 guint32 token;
1351 MonoImage *image;
1352 gboolean no_aot_trampoline;
1353
1354 if (MONO_CLASS_IS_INTERFACE (klass) || klass->rank || !aot_module)
1355 return NULL;
1356
1357 info = &aot_module->blob [mono_aot_get_offset (aot_module->class_info_offsets, mono_metadata_token_index (klass->type_token) - 1)];
1358 p = info;
1359
1360 err = decode_cached_class_info (aot_module, &class_info, p, &p);
1361 if (!err)
1362 return NULL;
1363
1364 for (i = 0; i < slot; ++i)
1365 decode_method_ref (aot_module, &token, NULL, NULL, p, &p);
1366
1367 image = decode_method_ref (aot_module, &token, NULL, &no_aot_trampoline, p, &p);
1368 if (!image)
1369 return NULL;
1370 if (no_aot_trampoline)
1371 return NULL;
1372
1373 if (mono_metadata_token_index (token) == 0)
1374 return NULL;
1375
1376 return mono_aot_get_method_from_token (domain, image, token);
1377 }
1378
1379 gboolean
1380 mono_aot_get_cached_class_info (MonoClass *klass, MonoCachedClassInfo *res)
1381 {
1382 MonoAotModule *aot_module = klass->image->aot_module;
1383 guint8 *p;
1384 gboolean err;
1385
1386 if (klass->rank || !aot_module)
1387 return FALSE;
1388
1389 p = (guint8*)&aot_module->blob [mono_aot_get_offset (aot_module->class_info_offsets, mono_metadata_token_index (klass->type_token) - 1)];
1390
1391 err = decode_cached_class_info (aot_module, res, p, &p);
1392 if (!err)
1393 return FALSE;
1394
1395 return TRUE;
1396 }
1397
1398 /**
1399 * mono_aot_get_class_from_name:
1400 *
1401 * Obtains a MonoClass with a given namespace and a given name which is located in IMAGE,
1402 * using a cache stored in the AOT file.
1403 * Stores the resulting class in *KLASS if found, stores NULL otherwise.
1404 *
1405 * Returns: TRUE if the klass was found/not found in the cache, FALSE if no aot file was
1406 * found.
1407 */
1408 gboolean
1409 mono_aot_get_class_from_name (MonoImage *image, const char *name_space, const char *name, MonoClass **klass)
1410 {
1411 MonoAotModule *aot_module = image->aot_module;
1412 guint16 *table, *entry;
1413 guint16 table_size;
1414 guint32 hash;
1415 char full_name_buf [1024];
1416 char *full_name;
1417 const char *name2, *name_space2;
1418 MonoTableInfo *t;
1419 guint32 cols [MONO_TYPEDEF_SIZE];
1420 GHashTable *nspace_table;
1421
1422 if (!aot_module || !aot_module->class_name_table)
1423 return FALSE;
1424
1425 mono_aot_lock ();
1426
1427 *klass = NULL;
1428
1429 /* First look in the cache */
1430 if (!aot_module->name_cache)
1431 aot_module->name_cache = g_hash_table_new (g_str_hash, g_str_equal);
1432 nspace_table = g_hash_table_lookup (aot_module->name_cache, name_space);
1433 if (nspace_table) {
1434 *klass = g_hash_table_lookup (nspace_table, name);
1435 if (*klass) {
1436 mono_aot_unlock ();
1437 return TRUE;
1438 }
1439 }
1440
1441 table_size = aot_module->class_name_table [0];
1442 table = aot_module->class_name_table + 1;
1443
1444 if (name_space [0] == '\0')
1445 full_name = g_strdup_printf ("%s", name);
1446 else {
1447 if (strlen (name_space) + strlen (name) < 1000) {
1448 sprintf (full_name_buf, "%s.%s", name_space, name);
1449 full_name = full_name_buf;
1450 } else {
1451 full_name = g_strdup_printf ("%s.%s", name_space, name);
1452 }
1453 }
1454 hash = mono_metadata_str_hash (full_name) % table_size;
1455 if (full_name != full_name_buf)
1456 g_free (full_name);
1457
1458 entry = &table [hash * 2];
1459
1460 if (entry [0] != 0) {
1461 t = &image->tables [MONO_TABLE_TYPEDEF];
1462
1463 while (TRUE) {
1464 guint32 index = entry [0];
1465 guint32 next = entry [1];
1466 guint32 token = mono_metadata_make_token (MONO_TABLE_TYPEDEF, index);
1467
1468 name_table_accesses ++;
1469
1470 mono_metadata_decode_row (t, index - 1, cols, MONO_TYPEDEF_SIZE);
1471
1472 name2 = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
1473 name_space2 = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
1474
1475 if (!strcmp (name, name2) && !strcmp (name_space, name_space2)) {
1476 mono_aot_unlock ();
1477 *klass = mono_class_get (image, token);
1478
1479 /* Add to cache */
1480 if (*klass) {
1481 mono_aot_lock ();
1482 nspace_table = g_hash_table_lookup (aot_module->name_cache, name_space);
1483 if (!nspace_table) {
1484 nspace_table = g_hash_table_new (g_str_hash, g_str_equal);
1485 g_hash_table_insert (aot_module->name_cache, (char*)name_space2, nspace_table);
1486 }
1487 g_hash_table_insert (nspace_table, (char*)name2, *klass);
1488 mono_aot_unlock ();
1489 }
1490 return TRUE;
1491 }
1492
1493 if (next != 0) {
1494 entry = &table [next * 2];
1495 } else {
1496 break;
1497 }
1498 }
1499 }
1500
1501 mono_aot_unlock ();
1502
1503 return TRUE;
1504 }
1505
1506 #define DW_EH_PE_omit 0xff
1507 #define DW_EH_PE_uleb128 0x01
1508 #define DW_EH_PE_udata2 0x02
1509 #define DW_EH_PE_udata4 0x03
1510 #define DW_EH_PE_udata8 0x04
1511 #define DW_EH_PE_sleb128 0x09
1512 #define DW_EH_PE_sdata2 0x0A
1513 #define DW_EH_PE_sdata4 0x0B
1514 #define DW_EH_PE_sdata8 0x0C
1515
1516 #define DW_EH_PE_absptr 0x00
1517 #define DW_EH_PE_pcrel 0x10
1518 #define DW_EH_PE_datarel 0x30
1519 #define DW_EH_PE_omit 0xff
1520
1521 typedef struct
1522 {
1523 guint8 version;
1524 guint8 eh_frame_ptr_enc;
1525 guint8 fde_count_enc;
1526 guint8 table_enc;
1527 guint8 rest;
1528 } eh_frame_hdr;
1529
1530 /*
1531 * decode_eh_frame:
1532 *
1533 * Decode the exception handling information in the .eh_frame section of the AOT
1534 * file belong to CODE, and construct a MonoJitInfo structure from it.
1535 * LOCKING: Acquires the domain lock.
1536 */
1537 static G_GNUC_UNUSED void
1538 decode_eh_frame (MonoAotModule *amodule, MonoDomain *domain,
1539 MonoMethod *method, guint8 *code, MonoJitInfo *jinfo)
1540 {
1541 eh_frame_hdr *hdr;
1542 guint8 *p;
1543 guint8 *eh_frame, *unwind_info;
1544 guint32 eh_frame_ptr;
1545 int fde_count;
1546 gint32 *table;
1547 int i, pos, left, right, offset, offset1, offset2;
1548 guint32 unw_len, code_len;
1549 MonoJitExceptionInfo *ei;
1550 guint32 ei_len;
1551
1552 g_assert (amodule->eh_frame_hdr);
1553
1554 // http://refspecs.freestandards.org/LSB_1.3.0/gLSB/gLSB/ehframehdr.html
1555 hdr = (eh_frame_hdr*)amodule->eh_frame_hdr;
1556 g_assert (hdr->version == 1);
1557 g_assert (hdr->eh_frame_ptr_enc == (DW_EH_PE_pcrel | DW_EH_PE_sdata4));
1558 g_assert (hdr->fde_count_enc == DW_EH_PE_udata4);
1559 g_assert (hdr->table_enc == (DW_EH_PE_datarel | DW_EH_PE_sdata4));
1560
1561 p = &(hdr->rest);
1562 eh_frame_ptr = *(guint32*)p;
1563 p += 4;
1564 fde_count = *(guint32*)p;
1565 p += 4;
1566 table = (gint32*)p;
1567
1568 /* Binary search in the table to find the entry for code */
1569 offset = code - amodule->eh_frame_hdr;
1570
1571 left = 0;
1572 right = fde_count;
1573 while (TRUE) {
1574 pos = (left + right) / 2;
1575
1576 offset1 = table [(pos * 2)];
1577 if (pos + 1 == fde_count)
1578 /* FIXME: */
1579 offset2 = amodule->code_end - amodule->code;
1580 else
1581 offset2 = table [(pos + 1) * 2];
1582
1583 if (offset < offset1)
1584 right = pos;
1585 else if (offset >= offset2)
1586 left = pos + 1;
1587 else
1588 break;
1589 }
1590
1591 g_assert (code >= amodule->eh_frame_hdr + table [(pos * 2)]);
1592 if (pos < fde_count)
1593 g_assert (code < amodule->eh_frame_hdr + table [(pos * 2) + 2]);
1594
1595 eh_frame = amodule->eh_frame_hdr + table [(pos * 2) + 1];
1596
1597 unwind_info = mono_unwind_decode_fde (eh_frame, &unw_len, &code_len, &ei, &ei_len, NULL);
1598
1599 jinfo->code_size = code_len;
1600 jinfo->used_regs = mono_cache_unwind_info (unwind_info, unw_len);
1601 jinfo->method = method;
1602 jinfo->code_start = code;
1603 jinfo->domain_neutral = 0;
1604 /* This signals that used_regs points to a normal cached unwind info */
1605 jinfo->from_aot = 0;
1606
1607 g_assert (ei_len == jinfo->num_clauses);
1608 for (i = 0; i < jinfo->num_clauses; ++i) {
1609 MonoJitExceptionInfo *jei = &jinfo->clauses [i];
1610
1611 jei->try_start = ei [i].try_start;
1612 jei->try_end = ei [i].try_end;
1613 jei->handler_start = ei [i].handler_start;
1614 }
1615 }
1616
1617 #ifdef TARGET_ARM
1618
1619 /* The offsets in the table are 31 bits long, have to extend them to 32 */
1620 #define EXTEND_PREL31(val) ((((gint32)(val)) << 1) >> 1)
1621
1622 static inline guint32
1623 decode_uleb128 (guint8 *buf, guint8 **endbuf)
1624 {
1625 guint8 *p = buf;
1626 guint32 res = 0;
1627 int shift = 0;
1628
1629 while (TRUE) {
1630 guint8 b = *p;
1631 p ++;
1632
1633 res = res | (((int)(b & 0x7f)) << shift);
1634 if (!(b & 0x80))
1635 break;
1636 shift += 7;
1637 }
1638
1639 *endbuf = p;
1640
1641 return res;
1642 }
1643
1644 static GSList*
1645 decode_arm_eh_ops (guint8 *unwind_ops, int nops)
1646 {
1647 int i, vsp_reg, vsp_offset;
1648 GSList *ops;
1649 gint32 *reg_offsets;
1650
1651 /*
1652 * Have to convert the ARM unwind info into DWARF unwind info.
1653 * The ARM unwind info specifies a simple set of instructions which need to be
1654 * executed during unwinding. It manipulates a virtual stack pointer (vsp). The
1655 * connection with DWARF unwind info is the following: after all ARM unwind
1656 * opcodes have been executed, the stack should be completely unwound, i.e.
1657 * vsp == DWARF CFA. This allows us to construct the DWARF opcodes corresponding
1658 * to the ARM opcodes.
1659 * The ARM unwind info is not instruction precise, i. e. it can't handle
1660 * async exceptions etc.
1661 */
1662 /* The reg used to compute the initial value of vsp */
1663 vsp_reg = ARMREG_SP;
1664 /* The offset between vsp_reg and the CFA */
1665 vsp_offset = 0;
1666
1667 /* The register save offsets from the initial value of vsp */
1668 reg_offsets = g_new0 (gint32, 16);
1669 for (i = 0; i < 16; ++i)
1670 reg_offsets [i] = -1;
1671
1672 /* section 9.3 in the ehabi doc */
1673 for (i = 0; i < nops; ++i) {
1674 guint8 op = unwind_ops [i];
1675
1676 if ((op >> 6) == 0) {
1677 /* vsp = vsp + (xxxxxx << 2) + 4. */
1678 vsp_offset += ((op & 0x3f) << 2) + 4;
1679 } else if ((op >> 6) == 1) {
1680 /* vsp = vsp - (xxxxxx << 2) - 4. */
1681 vsp_offset -= ((op & 0x3f) << 2) + 4;
1682 } else if (op == 0xb2) {
1683 /* vsp = vsp = vsp + 0x204 + (uleb128 << 2) */
1684 guint8 *p = unwind_ops + i + 1;
1685 guint32 v = decode_uleb128 (p, &p);
1686
1687 vsp_offset += 0x204 + (v << 2);
1688 i = (p - unwind_ops) - 1;
1689 } else if (op >= 0x80 && op <= 0x8f) {
1690 /* pop registers */
1691 guint8 op2;
1692 GSList *regs;
1693 int j;
1694
1695 g_assert (i + 1 < nops);
1696 op2 = unwind_ops [i + 1];
1697
1698 regs = NULL;
1699 for (j = 0; j < 8; ++j)
1700 if (op2 & (0x1 << j))
1701 regs = g_slist_append (regs, GUINT_TO_POINTER (ARMREG_R4 + j));
1702 for (j = 0; j < 4; ++j)
1703 if (op & (0x1 << j))
1704 regs = g_slist_append (regs, GUINT_TO_POINTER (ARMREG_R12 + j));
1705 g_assert (regs);
1706
1707 for (j = 0; j < g_slist_length (regs); ++j)
1708 reg_offsets [GPOINTER_TO_UINT (g_slist_nth (regs, j)->data)] = vsp_offset + (j * 4);
1709
1710 vsp_offset += g_slist_length (regs) * 4;
1711
1712 g_slist_free (regs);
1713
1714 i ++;
1715 } else if (op >= 0xa8 && op <= 0xaf) {
1716 GSList *regs;
1717 int j;
1718
1719 /* pop r4-r[4 + nnn], r14 */
1720
1721 regs = NULL;
1722 for (j = 0; j <= (op & 0x7); ++j)
1723 regs = g_slist_append (regs, GUINT_TO_POINTER (ARMREG_R4 + j));
1724 regs = g_slist_append (regs, GUINT_TO_POINTER (ARMREG_R14));
1725
1726 for (j = 0; j < g_slist_length (regs); ++j)
1727 reg_offsets [GPOINTER_TO_UINT (g_slist_nth (regs, j)->data)] = vsp_offset + (j * 4);
1728
1729 vsp_offset += g_slist_length (regs) * 4;
1730
1731 g_slist_free (regs);
1732 } else if (op == 0xb0) {
1733 /* finish */
1734 break;
1735 } else if (op >= 0x90 && op <= 0x9f && op != 0x9d && op != 0x9f) {
1736 /* vsp = <reg> */
1737 vsp_reg = op & 0xf;
1738 vsp_offset = 0;
1739 } else {
1740 int j;
1741
1742 for (j = 0; j < nops; ++j)
1743 printf ("%x ", unwind_ops [j]);
1744 printf (" / %d\n", i);
1745 g_assert_not_reached ();
1746 }
1747 }
1748
1749 ops = NULL;
1750
1751 /* vsp_reg + vsp_offset = CFA */
1752 mono_add_unwind_op_def_cfa (ops, (guint8*)NULL, (guint8*)NULL, vsp_reg, vsp_offset);
1753
1754 for (i = 0; i < 16; ++i) {
1755 if (reg_offsets [i] != -1)
1756 /* The reg is saved at vsp_reg + reg_offset [i] == CFA - (vsp_offset - reg_offset [i]) */
1757 mono_add_unwind_op_offset (ops, (guint8*)NULL, (guint8*)NULL, i, - (vsp_offset - reg_offsets [i]));
1758 }
1759
1760 return ops;
1761 }
1762
1763 /*
1764 * decode_arm_exidx:
1765 *
1766 * Decode the exception handling information in the .ARM.exidx section of the AOT
1767 * file belong to CODE, and construct a MonoJitInfo structure from it.
1768 * LOCKING: Acquires the domain lock.
1769 */
1770 static void
1771 decode_arm_exidx (MonoAotModule *amodule, MonoDomain *domain,
1772 MonoMethod *method, guint8 *code, guint32 code_len, MonoJitInfo *jinfo)
1773 {
1774 guint32 *table;
1775 guint8 *base, *code1, *code2;
1776 int i, pos, left, right, offset, offset1, offset2, count, nwords, nops;
1777 guint32 entry;
1778 guint8 unwind_ops [64];
1779 GSList *ops;
1780 guint8 *unwind_info;
1781 guint32 unw_len;
1782
1783 g_assert (amodule->arm_exidx);
1784
1785 table = (guint32*)amodule->arm_exidx;
1786
1787 /*
1788 * The table format is described in:
1789 * infocenter.arm.com/help/topic/com.arm.doc.../IHI0038A_ehabi.pdf
1790 */
1791
1792 base = amodule->arm_exidx;
1793 count = amodule->arm_exidx_size / 8;
1794
1795 /* Binary search in the table to find the entry for code */
1796 offset = code - base;
1797
1798 left = 0;
1799 right = count;
1800 while (TRUE) {
1801 pos = (left + right) / 2;
1802
1803 if (left == right)
1804 break;
1805
1806 offset1 = EXTEND_PREL31 (table [(pos * 2)]);
1807 code1 = (guint8*)&(table [pos * 2]) + offset1;
1808 if (pos + 1 == count)
1809 /* FIXME: */
1810 offset2 = amodule->code_end - amodule->code;
1811 else
1812 offset2 = EXTEND_PREL31 (table [(pos + 1) * 2]);
1813 code2 = (guint8*)&(table [(pos + 1) * 2]) + offset2;
1814
1815 if (code < code1)
1816 right = pos;
1817 else if (code >= code2)
1818 left = pos + 1;
1819 else
1820 break;
1821 }
1822
1823 if (code >= code1) {
1824 /*
1825 * The linker might merge duplicate unwind table entries, so
1826 * offset1 and offset2 might point to another method, but this is not a problem.
1827 */
1828 code1 = (guint8*)&(table [pos * 2]) + offset1;
1829 code2 = (guint8*)&(table [(pos + 1) * 2]) + offset2;
1830
1831 g_assert (code >= code1);
1832 if (pos < count)
1833 g_assert (code < code2);
1834
1835 entry = table [(pos * 2) + 1];
1836
1837 /* inline entry, compact model, personality routine 0 */
1838 if ((entry & 0xff000000) == 0x80000000) {
1839 nops = 3;
1840 unwind_ops [0] = (entry & 0x00ff0000) >> 16;
1841 unwind_ops [1] = (entry & 0x0000ff00) >> 8;
1842 unwind_ops [2] = (entry & 0x000000ff) >> 0;
1843
1844 ops = decode_arm_eh_ops (unwind_ops, nops);
1845 } else if ((entry & 0x80000000) == 0) {
1846 /* non-inline entry */
1847 guint8 *data = (guint8*)&table [(pos * 2) + 1] + EXTEND_PREL31 (entry);
1848
1849 entry = ((guint32*)data) [0];
1850
1851 /* compact model, personality routine 1 */
1852 g_assert ((entry & 0xff000000) == 0x81000000);
1853
1854 nwords = (entry & 0x00ff0000) >> 16;
1855 nops = nwords * 4 + 2;
1856 g_assert (nops < 64);
1857
1858 unwind_ops [0] = (entry & 0x0000ff00) >> 8;
1859 unwind_ops [1] = (entry & 0x000000ff) >> 0;
1860
1861 for (i = 0; i < nwords; ++i) {
1862 entry = ((guint32*)data) [1 + i];
1863 unwind_ops [(i * 4) + 2] = (entry & 0xff000000) >> 24;
1864 unwind_ops [(i * 4) + 2 + 1] = (entry & 0x00ff0000) >> 16;
1865 unwind_ops [(i * 4) + 2 + 2] = (entry & 0x0000ff00) >> 8;
1866 unwind_ops [(i * 4) + 2 + 3] = (entry & 0x000000ff) >> 0;
1867 }
1868
1869 ops = decode_arm_eh_ops (unwind_ops, nops);
1870 } else {
1871 NOT_IMPLEMENTED;
1872 }
1873
1874 unwind_info = mono_unwind_ops_encode (ops, &unw_len);
1875 } else {
1876 /* The method has no unwind info */
1877 unwind_info = NULL;
1878 unw_len = 0;
1879 }
1880
1881 jinfo->code_size = code_len;
1882 jinfo->used_regs = mono_cache_unwind_info (unwind_info, unw_len);
1883 jinfo->method = method;
1884 jinfo->code_start = code;
1885 jinfo->domain_neutral = 0;
1886 /* This signals that used_regs points to a normal cached unwind info */
1887 jinfo->from_aot = 0;
1888 }
1889 #endif
1890
1891 /*
1892 * LOCKING: Acquires the domain lock.
1893 */
1894 static MonoJitInfo*
1895 decode_exception_debug_info (MonoAotModule *amodule, MonoDomain *domain,
1896 MonoMethod *method, guint8* ex_info, guint8 *addr,
1897 guint8 *code, guint32 code_len)
1898 {
1899 int i, buf_len;
1900 MonoJitInfo *jinfo;
1901 guint used_int_regs, flags;
1902 gboolean has_generic_jit_info, has_dwarf_unwind_info, has_clauses, has_seq_points;
1903 gboolean from_llvm;
1904 guint8 *p;
1905 int generic_info_size;
1906
1907 /* Load the method info from the AOT file */
1908
1909 p = ex_info;
1910 flags = decode_value (p, &p);
1911 has_generic_jit_info = (flags & 1) != 0;
1912 has_dwarf_unwind_info = (flags & 2) != 0;
1913 has_clauses = (flags & 4) != 0;
1914 has_seq_points = (flags & 8) != 0;
1915 from_llvm = (flags & 16) != 0;
1916 if (has_dwarf_unwind_info) {
1917 guint32 offset;
1918
1919 offset = decode_value (p, &p);
1920 g_assert (offset < (1 << 30));
1921 used_int_regs = offset;
1922 } else {
1923 used_int_regs = decode_value (p, &p);
1924 }
1925 if (has_generic_jit_info)
1926 generic_info_size = sizeof (MonoGenericJitInfo);
1927 else
1928 generic_info_size = 0;
1929
1930 /* Exception table */
1931 if (has_clauses) {
1932 int num_clauses = decode_value (p, &p);
1933
1934 jinfo =
1935 mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO + (sizeof (MonoJitExceptionInfo) * num_clauses) + generic_info_size);
1936 jinfo->num_clauses = num_clauses;
1937
1938 for (i = 0; i < num_clauses; ++i) {
1939 MonoJitExceptionInfo *ei = &jinfo->clauses [i];
1940
1941 ei->flags = decode_value (p, &p);
1942 ei->exvar_offset = decode_value (p, &p);
1943
1944 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER)
1945 ei->data.filter = code + decode_value (p, &p);
1946 else {
1947 if (decode_value (p, &p))
1948 ei->data.catch_class = decode_klass_ref (amodule, p, &p);
1949 }
1950
1951 ei->try_start = code + decode_value (p, &p);
1952 ei->try_end = code + decode_value (p, &p);
1953 ei->handler_start = code + decode_value (p, &p);
1954 }
1955 }
1956 else {
1957 jinfo = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO + generic_info_size);
1958 }
1959
1960 if (from_llvm) {
1961 /* LLVM compiled method */
1962 /* The info is in the .eh_frame section */
1963 #ifdef TARGET_ARM
1964 decode_arm_exidx (amodule, domain, method, code, code_len, jinfo);
1965 #else
1966 decode_eh_frame (amodule, domain, method, code, jinfo);
1967 #endif
1968 jinfo->from_llvm = 1;
1969 } else {
1970 jinfo->code_size = code_len;
1971 jinfo->used_regs = used_int_regs;
1972 jinfo->method = method;
1973 jinfo->code_start = code;
1974 jinfo->domain_neutral = 0;
1975 jinfo->from_aot = 1;
1976 }
1977
1978 if (has_generic_jit_info) {
1979 MonoGenericJitInfo *gi;
1980
1981 jinfo->has_generic_jit_info = 1;
1982
1983 gi = mono_jit_info_get_generic_jit_info (jinfo);
1984 g_assert (gi);
1985
1986 gi->has_this = decode_value (p, &p);
1987 gi->this_reg = decode_value (p, &p);
1988 gi->this_offset = decode_value (p, &p);
1989
1990 /* This currently contains no data */
1991 gi->generic_sharing_context = g_new0 (MonoGenericSharingContext, 1);
1992
1993 jinfo->method = decode_method_ref_2 (amodule, p, &p);
1994 }
1995
1996 if (has_seq_points) {
1997 MonoSeqPointInfo *seq_points;
1998 int il_offset, native_offset, last_il_offset, last_native_offset, j;
1999
2000 int len = decode_value (p, &p);
2001
2002 seq_points = g_malloc0 (sizeof (MonoSeqPointInfo) + (len - MONO_ZERO_LEN_ARRAY) * sizeof (SeqPoint));
2003 seq_points->len = len;
2004 last_il_offset = last_native_offset = 0;
2005 for (i = 0; i < len; ++i) {
2006 SeqPoint *sp = &seq_points->seq_points [i];
2007 il_offset = last_il_offset + decode_value (p, &p);
2008 native_offset = last_native_offset + decode_value (p, &p);
2009
2010 sp->il_offset = il_offset;
2011 sp->native_offset = native_offset;
2012
2013 sp->next_len = decode_value (p, &p);
2014 sp->next = g_new (int, sp->next_len);
2015 for (j = 0; j < sp->next_len; ++j)
2016 sp->next [j] = decode_value (p, &p);
2017
2018 last_il_offset = il_offset;
2019 last_native_offset = native_offset;
2020 }
2021
2022 mono_domain_lock (domain);
2023 g_hash_table_insert (domain_jit_info (domain)->seq_points, method, seq_points);
2024 mono_domain_unlock (domain);
2025 }
2026
2027 /* Load debug info */
2028 buf_len = decode_value (p, &p);
2029 mono_debug_add_aot_method (domain, method, code, p, buf_len);
2030
2031 if (amodule != jinfo->method->klass->image->aot_module) {
2032 mono_aot_lock ();
2033 if (!ji_to_amodule)
2034 ji_to_amodule = g_hash_table_new (NULL, NULL);
2035 g_hash_table_insert (ji_to_amodule, jinfo, amodule);
2036 mono_aot_unlock ();
2037 }
2038
2039 return jinfo;
2040 }
2041
2042 /*
2043 * mono_aot_get_unwind_info:
2044 *
2045 * Return a pointer to the DWARF unwind info belonging to JI.
2046 */
2047 guint8*
2048 mono_aot_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
2049 {
2050 MonoAotModule *amodule = ji->method->klass->image->aot_module;
2051 guint8 *p;
2052 guint8 *code = ji->code_start;
2053
2054 g_assert (amodule);
2055 g_assert (ji->from_aot);
2056
2057 if (!(code >= amodule->code && code <= amodule->code_end)) {
2058 /* ji belongs to a different aot module than amodule */
2059 mono_aot_lock ();
2060 g_assert (ji_to_amodule);
2061 amodule = g_hash_table_lookup (ji_to_amodule, ji);
2062 g_assert (amodule);
2063 g_assert (code >= amodule->code && code <= amodule->code_end);
2064 }
2065
2066 p = amodule->unwind_info + ji->used_regs;
2067 *unwind_info_len = decode_value (p, &p);
2068 return p;
2069 }
2070
2071 static int
2072 compare_ints (const void *a, const void *b)
2073 {
2074 return *(gint32*)a - *(gint32*)b;
2075 }
2076
2077 MonoJitInfo *
2078 mono_aot_find_jit_info (MonoDomain *domain, MonoImage *image, gpointer addr)
2079 {
2080 int pos, left, right, offset, offset1, offset2, code_len;
2081 int method_index, table_len, is_wrapper;
2082 guint32 token;
2083 MonoAotModule *amodule = image->aot_module;
2084 MonoMethod *method;
2085 MonoJitInfo *jinfo;
2086 guint8 *code, *ex_info, *p;
2087 guint32 *table;
2088 int nmethods = amodule->info.nmethods;
2089 gint32 *code_offsets;
2090 int i;
2091
2092 if (!amodule)
2093 return NULL;
2094
2095 if (domain != mono_get_root_domain ())
2096 /* FIXME: */
2097 return NULL;
2098
2099 offset = (guint8*)addr - amodule->code;
2100
2101 /* Compute a sorted table mapping code offsets to method indexes. */
2102 if (!amodule->sorted_code_offsets) {
2103 code_offsets = g_new0 (gint32, nmethods * 2);
2104 for (i = 0; i < nmethods; ++i) {
2105 code_offsets [(i * 2)] = amodule->code_offsets [i];
2106 code_offsets [(i *2) + 1] = i;
2107 }
2108 /* FIXME: Use a merge sort as this is mostly sorted */
2109 qsort (code_offsets, nmethods, sizeof (gint32) * 2, compare_ints);
2110 for (i = 0; i < nmethods -1; ++i)
2111 g_assert (code_offsets [(i * 2)] <= code_offsets [(i + 1) * 2]);
2112
2113 if (InterlockedCompareExchangePointer ((gpointer*)&amodule->sorted_code_offsets, code_offsets, NULL) != NULL)
2114 /* Somebody got in before us */
2115 g_free (code_offsets);
2116 }
2117
2118 code_offsets = amodule->sorted_code_offsets;
2119
2120 /* Binary search in the sorted_code_offsets table */
2121 left = 0;
2122 right = nmethods;
2123 while (TRUE) {
2124 pos = (left + right) / 2;
2125
2126 offset1 = code_offsets [(pos * 2)];
2127 if (pos + 1 == nmethods)
2128 offset2 = amodule->code_end - amodule->code;
2129 else
2130 offset2 = code_offsets [(pos + 1) * 2];
2131
2132 if (offset < offset1)
2133 right = pos;
2134 else if (offset >= offset2)
2135 left = pos + 1;
2136 else
2137 break;
2138 }
2139
2140 g_assert (offset >= code_offsets [(pos * 2)]);
2141 if (pos + 1 < nmethods)
2142 g_assert (offset < code_offsets [((pos + 1) * 2)]);
2143 method_index = code_offsets [(pos * 2) + 1];
2144
2145 code = &amodule->code [amodule->code_offsets [method_index]];
2146 ex_info = &amodule->blob [mono_aot_get_offset (amodule->ex_info_offsets, method_index)];
2147
2148 if (pos == nmethods - 1)
2149 code_len = amodule->code_end - code;
2150 else
2151 code_len = code_offsets [(pos + 1) * 2] - code_offsets [pos * 2];
2152
2153 g_assert ((guint8*)code <= (guint8*)addr && (guint8*)addr < (guint8*)code + code_len);
2154
2155 /* Might be a wrapper/extra method */
2156 if (amodule->extra_methods) {
2157 mono_aot_lock ();
2158 method = g_hash_table_lookup (amodule->extra_methods, GUINT_TO_POINTER (method_index));
2159 mono_aot_unlock ();
2160 } else {
2161 method = NULL;
2162 }
2163
2164 if (!method) {
2165 if (method_index >= image->tables [MONO_TABLE_METHOD].rows) {
2166 /*
2167 * This is hit for extra methods which are called directly, so they are
2168 * not in amodule->extra_methods.
2169 */
2170 table_len = amodule->extra_method_info_offsets [0];
2171 table = amodule->extra_method_info_offsets + 1;
2172 left = 0;
2173 right = table_len;
2174 pos = 0;
2175
2176 /* Binary search */
2177 while (TRUE) {
2178 pos = ((left + right) / 2);
2179
2180 g_assert (pos < table_len);
2181
2182 if (table [pos * 2] < method_index)
2183 left = pos + 1;
2184 else if (table [pos * 2] > method_index)
2185 right = pos;
2186 else
2187 break;
2188 }
2189
2190 p = amodule->blob + table [(pos * 2) + 1];
2191 is_wrapper = decode_value (p, &p);
2192 g_assert (!is_wrapper);
2193 method = decode_method_ref_2 (amodule, p, &p);
2194 g_assert (method);
2195 } else {
2196 token = mono_metadata_make_token (MONO_TABLE_METHOD, method_index + 1);
2197 method = mono_get_method (image, token, NULL);
2198 }
2199 }
2200
2201 /* FIXME: */
2202 g_assert (method);
2203
2204 //printf ("F: %s\n", mono_method_full_name (method, TRUE));
2205
2206 jinfo = decode_exception_debug_info (amodule, domain, method, ex_info, addr, code, code_len);
2207
2208 g_assert ((guint8*)addr >= (guint8*)jinfo->code_start);
2209 g_assert ((guint8*)addr < (guint8*)jinfo->code_start + jinfo->code_size);
2210
2211 /* Add it to the normal JitInfo tables */
2212 mono_jit_info_table_add (domain, jinfo);
2213
2214 return jinfo;
2215 }
2216
2217 static gboolean
2218 decode_patch (MonoAotModule *aot_module, MonoMemPool *mp, MonoJumpInfo *ji, guint8 *buf, guint8 **endbuf)
2219 {
2220 guint8 *p = buf;
2221 gpointer *table;
2222 MonoImage *image;
2223 int i;
2224
2225 switch (ji->type) {
2226 case MONO_PATCH_INFO_METHOD:
2227 case MONO_PATCH_INFO_METHOD_JUMP:
2228 case MONO_PATCH_INFO_ICALL_ADDR:
2229 case MONO_PATCH_INFO_METHOD_RGCTX: {
2230 guint32 token;
2231 MonoMethod *method;
2232 gboolean no_aot_trampoline;
2233
2234 image = decode_method_ref (aot_module, &token, &method, &no_aot_trampoline, p, &p);
2235 if (!image)
2236 goto cleanup;
2237
2238 if (!method && !mono_aot_only && !no_aot_trampoline && (ji->type == MONO_PATCH_INFO_METHOD) && (mono_metadata_token_table (token) == MONO_TABLE_METHOD)) {
2239 ji->data.target = mono_create_ftnptr (mono_domain_get (), mono_create_jit_trampoline_from_token (image, token));
2240 ji->type = MONO_PATCH_INFO_ABS;
2241 }
2242 else {
2243 if (method)
2244 ji->data.method = method;
2245 else
2246 ji->data.method = mono_get_method (image, token, NULL);
2247 g_assert (ji->data.method);
2248 mono_class_init (ji->data.method->klass);
2249 }
2250 break;
2251 }
2252 case MONO_PATCH_INFO_INTERNAL_METHOD:
2253 case MONO_PATCH_INFO_JIT_ICALL_ADDR: {
2254 guint32 len = decode_value (p, &p);
2255
2256 ji->data.name = (char*)p;
2257 p += len + 1;
2258 break;
2259 }
2260 case MONO_PATCH_INFO_METHODCONST:
2261 /* Shared */
2262 ji->data.method = decode_method_ref_2 (aot_module, p, &p);
2263 if (!ji->data.method)
2264 goto cleanup;
2265 break;
2266 case MONO_PATCH_INFO_VTABLE:
2267 case MONO_PATCH_INFO_CLASS:
2268 case MONO_PATCH_INFO_IID:
2269 case MONO_PATCH_INFO_ADJUSTED_IID:
2270 /* Shared */
2271 ji->data.klass = decode_klass_ref (aot_module, p, &p);
2272 if (!ji->data.klass)
2273 goto cleanup;
2274 break;
2275 case MONO_PATCH_INFO_CLASS_INIT:
2276 case MONO_PATCH_INFO_DELEGATE_TRAMPOLINE:
2277 ji->data.klass = decode_klass_ref (aot_module, p, &p);
2278 if (!ji->data.klass)
2279 goto cleanup;
2280 break;
2281 case MONO_PATCH_INFO_IMAGE:
2282 ji->data.image = load_image (aot_module, decode_value (p, &p), TRUE);
2283 if (!ji->data.image)
2284 goto cleanup;
2285 break;
2286 case MONO_PATCH_INFO_FIELD:
2287 case MONO_PATCH_INFO_SFLDA:
2288 /* Shared */
2289 ji->data.field = decode_field_info (aot_module, p, &p);
2290 if (!ji->data.field)
2291 goto cleanup;
2292 break;
2293 case MONO_PATCH_INFO_SWITCH:
2294 ji->data.table = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoBBTable));
2295 ji->data.table->table_size = decode_value (p, &p);
2296 table = g_new (gpointer, ji->data.table->table_size);
2297 ji->data.table->table = (MonoBasicBlock**)table;
2298 for (i = 0; i < ji->data.table->table_size; i++)
2299 table [i] = (gpointer)(gssize)decode_value (p, &p);
2300 break;
2301 case MONO_PATCH_INFO_R4: {
2302 guint32 val;
2303
2304 ji->data.target = mono_domain_alloc0 (mono_domain_get (), sizeof (float));
2305 val = decode_value (p, &p);
2306 *(float*)ji->data.target = *(float*)&val;
2307 break;
2308 }
2309 case MONO_PATCH_INFO_R8: {
2310 guint32 val [2];
2311 guint64 v;
2312
2313 ji->data.target = mono_domain_alloc0 (mono_domain_get (), sizeof (double));
2314
2315 val [0] = decode_value (p, &p);
2316 val [1] = decode_value (p, &p);
2317 v = ((guint64)val [1] << 32) | ((guint64)val [0]);
2318 *(double*)ji->data.target = *(double*)&v;
2319 break;
2320 }
2321 case MONO_PATCH_INFO_LDSTR:
2322 image = load_image (aot_module, decode_value (p, &p), TRUE);
2323 if (!image)
2324 goto cleanup;
2325 ji->data.token = mono_jump_info_token_new (mp, image, MONO_TOKEN_STRING + decode_value (p, &p));
2326 break;
2327 case MONO_PATCH_INFO_RVA:
2328 case MONO_PATCH_INFO_DECLSEC:
2329 case MONO_PATCH_INFO_LDTOKEN:
2330 case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
2331 /* Shared */
2332 image = load_image (aot_module, decode_value (p, &p), TRUE);
2333 if (!image)
2334 goto cleanup;
2335 ji->data.token = mono_jump_info_token_new (mp, image, decode_value (p, &p));
2336
2337 ji->data.token->has_context = decode_value (p, &p);
2338 if (ji->data.token->has_context) {
2339 gboolean res = decode_generic_context (aot_module, &ji->data.token->context, p, &p);
2340 if (!res)
2341 goto cleanup;
2342 }
2343 break;
2344 case MONO_PATCH_INFO_EXC_NAME:
2345 ji->data.klass = decode_klass_ref (aot_module, p, &p);
2346 if (!ji->data.klass)
2347 goto cleanup;
2348 ji->data.name = ji->data.klass->name;
2349 break;
2350 case MONO_PATCH_INFO_METHOD_REL:
2351 ji->data.offset = decode_value (p, &p);
2352 break;
2353 case MONO_PATCH_INFO_INTERRUPTION_REQUEST_FLAG:
2354 case MONO_PATCH_INFO_GENERIC_CLASS_INIT:
2355 case MONO_PATCH_INFO_MONITOR_ENTER:
2356 case MONO_PATCH_INFO_MONITOR_EXIT:
2357 break;
2358 case MONO_PATCH_INFO_RGCTX_FETCH: {
2359 gboolean res;
2360 MonoJumpInfoRgctxEntry *entry;
2361
2362 entry = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoRgctxEntry));
2363 entry->method = decode_method_ref_2 (aot_module, p, &p);
2364 entry->in_mrgctx = decode_value (p, &p);
2365 entry->info_type = decode_value (p, &p);
2366 entry->data = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfo));
2367 entry->data->type = decode_value (p, &p);
2368
2369 res = decode_patch (aot_module, mp, entry->data, p, &p);
2370 if (!res)
2371 goto cleanup;
2372 ji->data.rgctx_entry = entry;
2373 break;
2374 }
2375 case MONO_PATCH_INFO_SEQ_POINT_INFO:
2376 break;
2377 case MONO_PATCH_INFO_LLVM_IMT_TRAMPOLINE: {
2378 MonoJumpInfoImtTramp *imt_tramp = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoImtTramp));
2379
2380 imt_tramp->method = decode_method_ref_2 (aot_module, p, &p);
2381 imt_tramp->vt_offset = decode_value (p, &p);
2382
2383 ji->data.imt_tramp = imt_tramp;
2384 break;
2385 }
2386 default:
2387 g_warning ("unhandled type %d", ji->type);
2388 g_assert_not_reached ();
2389 }
2390
2391 *endbuf = p;
2392
2393 return TRUE;
2394
2395 cleanup:
2396 return FALSE;
2397 }
2398
2399 static MonoJumpInfo*
2400 load_patch_info (MonoAotModule *aot_module, MonoMemPool *mp, int n_patches,
2401 guint32 **got_slots,
2402 guint8 *buf, guint8 **endbuf)
2403 {
2404 MonoJumpInfo *patches;
2405 int pindex;
2406 guint8 *p;
2407
2408 p = buf;
2409
2410 patches = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfo) * n_patches);
2411
2412 *got_slots = g_malloc (sizeof (guint32) * n_patches);
2413
2414 for (pindex = 0; pindex < n_patches; ++pindex) {
2415 MonoJumpInfo *ji = &patches [pindex];
2416 guint8 *shared_p;
2417 gboolean res;
2418 guint32 got_offset;
2419
2420 got_offset = decode_value (p, &p);
2421
2422 if (aot_module->got [got_offset]) {
2423 /* Already loaded */
2424 //printf ("HIT!\n");
2425 } else {
2426 shared_p = aot_module->blob + mono_aot_get_offset (aot_module->got_info_offsets, got_offset);
2427
2428 ji->type = decode_value (shared_p, &shared_p);
2429
2430 res = decode_patch (aot_module, mp, ji, shared_p, &shared_p);
2431 if (!res)
2432 goto cleanup;
2433 }
2434
2435 (*got_slots) [pindex] = got_offset;
2436 }
2437
2438 *endbuf = p;
2439 return patches;
2440
2441 cleanup:
2442 g_free (*got_slots);
2443 *got_slots = NULL;
2444
2445 return NULL;
2446 }
2447
2448 static void
2449 register_jump_target_got_slot (MonoDomain *domain, MonoMethod *method, gpointer *got_slot)
2450 {
2451 /*
2452 * Jump addresses cannot be patched by the trampoline code since it
2453 * does not have access to the caller's address. Instead, we collect
2454 * the addresses of the GOT slots pointing to a method, and patch
2455 * them after the method has been compiled.
2456 */
2457 MonoJitDomainInfo *info = domain_jit_info (domain);
2458 GSList *list;
2459
2460 mono_domain_lock (domain);
2461 if (!info->jump_target_got_slot_hash)
2462 info->jump_target_got_slot_hash = g_hash_table_new (NULL, NULL);
2463 list = g_hash_table_lookup (info->jump_target_got_slot_hash, method);
2464 list = g_slist_prepend (list, got_slot);
2465 g_hash_table_insert (info->jump_target_got_slot_hash, method, list);
2466 mono_domain_unlock (domain);
2467 }
2468
2469 /*
2470 * load_method:
2471 *
2472 * Load the method identified by METHOD_INDEX from the AOT image. Return a
2473 * pointer to the native code of the method, or NULL if not found.
2474 * METHOD might not be set if the caller only has the image/token info.
2475 */
2476 static gpointer
2477 load_method (MonoDomain *domain, MonoAotModule *amodule, MonoImage *image, MonoMethod *method, guint32 token, int method_index)
2478 {
2479 MonoClass *klass;
2480 gboolean from_plt = method == NULL;
2481 MonoMemPool *mp;
2482 int i, pindex, n_patches, used_strings;
2483 gboolean keep_patches = TRUE;
2484 guint8 *p;
2485 MonoJitInfo *jinfo = NULL;
2486 guint8 *code, *info;
2487
2488 if (mono_profiler_get_events () & MONO_PROFILE_ENTER_LEAVE)
2489 return NULL;
2490
2491 if ((domain != mono_get_root_domain ()) && (!(amodule->info.opts & MONO_OPT_SHARED)))
2492 /* Non shared AOT code can't be used in other appdomains */
2493 return NULL;
2494
2495 if (amodule->out_of_date)
2496 return NULL;
2497
2498 if (amodule->code_offsets [method_index] == 0xffffffff) {
2499 if (mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
2500 char *full_name;
2501
2502 if (!method)
2503 method = mono_get_method (image, token, NULL);
2504 full_name = mono_method_full_name (method, TRUE);
2505 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT NOT FOUND: %s.\n", full_name);
2506 g_free (full_name);
2507 }
2508 return NULL;
2509 }
2510
2511 code = &amodule->code [amodule->code_offsets [method_index]];
2512
2513 info = &amodule->blob [mono_aot_get_offset (amodule->method_info_offsets, method_index)];
2514
2515 mono_aot_lock ();
2516 if (!amodule->methods_loaded)
2517 amodule->methods_loaded = g_new0 (guint32, amodule->info.nmethods + 1);
2518 mono_aot_unlock ();
2519
2520 if ((amodule->methods_loaded [method_index / 32] >> (method_index % 32)) & 0x1)
2521 return code;
2522
2523 if (mono_last_aot_method != -1) {
2524 if (mono_jit_stats.methods_aot >= mono_last_aot_method)
2525 return NULL;
2526 else if (mono_jit_stats.methods_aot == mono_last_aot_method - 1) {
2527 if (!method)
2528 method = mono_get_method (image, token, NULL);
2529 if (method) {
2530 char *name = mono_method_full_name (method, TRUE);
2531 printf ("LAST AOT METHOD: %s.\n", name);
2532 g_free (name);
2533 } else {
2534 printf ("LAST AOT METHOD: %p %d\n", code, method_index);
2535 }
2536 }
2537 }
2538
2539 p = info;
2540
2541 if (method) {
2542 klass = method->klass;
2543 decode_klass_ref (amodule, p, &p);
2544 } else {
2545 klass = decode_klass_ref (amodule, p, &p);
2546 }
2547
2548 if (amodule->info.opts & MONO_OPT_SHARED)
2549 used_strings = decode_value (p, &p);
2550 else
2551 used_strings = 0;
2552
2553 for (i = 0; i < used_strings; i++) {
2554 guint token = decode_value (p, &p);
2555 mono_ldstr (mono_get_root_domain (), image, mono_metadata_token_index (token));
2556 }
2557
2558 if (amodule->info.opts & MONO_OPT_SHARED)
2559 keep_patches = FALSE;
2560
2561 n_patches = decode_value (p, &p);
2562
2563 keep_patches = FALSE;
2564
2565 if (n_patches) {
2566 MonoJumpInfo *patches;
2567 guint32 *got_slots;
2568
2569 if (keep_patches)
2570 mp = domain->mp;
2571 else
2572 mp = mono_mempool_new ();
2573
2574 patches = load_patch_info (amodule, mp, n_patches, &got_slots, p, &p);
2575 if (patches == NULL)
2576 goto cleanup;
2577
2578 for (pindex = 0; pindex < n_patches; ++pindex) {
2579 MonoJumpInfo *ji = &patches [pindex];
2580
2581 if (!amodule->got [got_slots [pindex]]) {
2582 amodule->got [got_slots [pindex]] = mono_resolve_patch_target (method, domain, code, ji, TRUE);
2583 if (ji->type == MONO_PATCH_INFO_METHOD_JUMP)
2584 amodule->got [got_slots [pindex]] = mono_create_ftnptr (domain, amodule->got [got_slots [pindex]]);
2585 if (ji->type == MONO_PATCH_INFO_METHOD_JUMP)
2586 register_jump_target_got_slot (domain, ji->data.method, &(amodule->got [got_slots [pindex]]));
2587 }
2588 ji->type = MONO_PATCH_INFO_NONE;
2589 }
2590
2591 g_free (got_slots);
2592
2593 if (!keep_patches)
2594 mono_mempool_destroy (mp);
2595 }
2596
2597 if (mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
2598 char *full_name;
2599
2600 if (!method)
2601 method = mono_get_method (image, token, NULL);
2602
2603 full_name = mono_method_full_name (method, TRUE);
2604
2605 if (!jinfo)
2606 jinfo = mono_aot_find_jit_info (domain, amodule->assembly->image, code);
2607
2608 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT FOUND AOT compiled code for %s %p - %p %p\n", full_name, code, code + jinfo->code_size, info);
2609 g_free (full_name);
2610 }
2611
2612 mono_aot_lock ();
2613
2614 mono_jit_stats.methods_aot++;
2615
2616 amodule->methods_loaded [method_index / 32] |= 1 << (method_index % 32);
2617
2618 init_plt (amodule);
2619
2620 if (method && method->wrapper_type)
2621 g_hash_table_insert (amodule->method_to_code, method, code);
2622
2623 mono_aot_unlock ();
2624
2625 if (mono_profiler_get_events () & MONO_PROFILE_JIT_COMPILATION) {
2626 MonoJitInfo *jinfo;
2627
2628 if (!method) {
2629 method = mono_get_method (image, token, NULL);
2630 g_assert (method);
2631 }
2632 mono_profiler_method_jit (method);
2633 jinfo = mono_jit_info_table_find (domain, (char*)code);
2634 g_assert (jinfo);
2635 mono_profiler_method_end_jit (method, jinfo, MONO_PROFILE_OK);
2636 }
2637
2638 if (from_plt && klass && !klass->generic_container)
2639 mono_runtime_class_init (mono_class_vtable (domain, klass));
2640
2641 return code;
2642
2643 cleanup:
2644 /* FIXME: The space in domain->mp is wasted */
2645 if (amodule->info.opts & MONO_OPT_SHARED)
2646 /* No need to cache patches */
2647 mono_mempool_destroy (mp);
2648
2649 if (jinfo)
2650 g_free (jinfo);
2651
2652 return NULL;
2653 }
2654
2655 static guint32
2656 find_extra_method_in_amodule (MonoAotModule *amodule, MonoMethod *method, const char *name)
2657 {
2658 guint32 table_size, entry_size, hash;
2659 guint32 *table, *entry;
2660 guint32 index;
2661 static guint32 n_extra_decodes;
2662
2663 if (!amodule)
2664 return 0xffffff;
2665
2666 table_size = amodule->extra_method_table [0];
2667 table = amodule->extra_method_table + 1;
2668 entry_size = 3;
2669
2670 hash = mono_aot_method_hash (method) % table_size;
2671
2672 entry = &table [hash * entry_size];
2673
2674 if (entry [0] == 0)
2675 return 0xffffff;
2676
2677 index = 0xffffff;
2678 while (TRUE) {
2679 guint32 key = entry [0];
2680 guint32 value = entry [1];
2681 guint32 next = entry [entry_size - 1];
2682 MonoMethod *m;
2683 guint8 *p;
2684 int is_wrapper_name;
2685
2686 p = amodule->blob + key;
2687 is_wrapper_name = decode_value (p, &p);
2688 if (is_wrapper_name) {
2689 int wrapper_type = decode_value (p, &p);
2690 if (wrapper_type == method->wrapper_type && !strcmp (name, (char*)p)) {
2691 index = value;
2692 break;
2693 }
2694 } else if (can_method_ref_match_method (amodule, p, method)) {
2695 mono_aot_lock ();
2696 if (!amodule->method_ref_to_method)
2697 amodule->method_ref_to_method = g_hash_table_new (NULL, NULL);
2698 m = g_hash_table_lookup (amodule->method_ref_to_method, p);
2699 mono_aot_unlock ();
2700 if (!m) {
2701 guint8 *orig_p = p;
2702 m = decode_method_ref_2 (amodule, p, &p);
2703 if (m) {
2704 mono_aot_lock ();
2705 g_hash_table_insert (amodule->method_ref_to_method, orig_p, m);
2706 mono_aot_unlock ();
2707 }
2708 }
2709 if (m == method) {
2710 index = value;
2711 break;
2712 }
2713
2714 /* Special case: wrappers of shared generic methods */
2715 if (m && method->wrapper_type && m->wrapper_type == m->wrapper_type &&
2716 method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED) {
2717 MonoMethod *w1 = mono_marshal_method_from_wrapper (method);
2718 MonoMethod *w2 = mono_marshal_method_from_wrapper (m);
2719
2720 if (w1->is_inflated && ((MonoMethodInflated *)w1)->declaring == w2) {
2721 index = value;
2722 break;
2723 }
2724 }
2725
2726 /* Methods decoded needlessly */
2727 /*
2728 if (m)
2729 printf ("%d %s %s\n", n_extra_decodes, mono_method_full_name (method, TRUE), mono_method_full_name (m, TRUE));
2730 */
2731 n_extra_decodes ++;
2732 }
2733
2734 if (next != 0)
2735 entry = &table [next * entry_size];
2736 else
2737 break;
2738 }
2739
2740 return index;
2741 }
2742
2743 static void
2744 add_module_cb (gpointer key, gpointer value, gpointer user_data)
2745 {
2746 g_ptr_array_add ((GPtrArray*)user_data, value);
2747 }
2748
2749 /*
2750 * find_extra_method:
2751 *
2752 * Try finding METHOD in the extra_method table in all AOT images.
2753 * Return its method index, or 0xffffff if not found. Set OUT_AMODULE to the AOT
2754 * module where the method was found.
2755 */
2756 static guint32
2757 find_extra_method (MonoMethod *method, MonoAotModule **out_amodule)
2758 {
2759 guint32 index;
2760 GPtrArray *modules;
2761 int i;
2762 char *name = NULL;
2763
2764 if (method->wrapper_type)
2765 name = mono_aot_wrapper_name (method);
2766
2767 /* Try the method's module first */
2768 *out_amodule = method->klass->image->aot_module;
2769 index = find_extra_method_in_amodule (method->klass->image->aot_module, method, name);
2770 if (index != 0xffffff) {
2771 g_free (name);
2772 return index;
2773 }
2774
2775 /*
2776 * Try all other modules.
2777 * This is needed because generic instances klass->image points to the image
2778 * containing the generic definition, but the native code is generated to the
2779 * AOT image which contains the reference.
2780 */
2781
2782 /* Make a copy to avoid doing the search inside the aot lock */
2783 modules = g_ptr_array_new ();
2784 mono_aot_lock ();
2785 g_hash_table_foreach (aot_modules, add_module_cb, modules);
2786 mono_aot_unlock ();
2787
2788 index = 0xffffff;
2789 for (i = 0; i < modules->len; ++i) {
2790 MonoAotModule *amodule = g_ptr_array_index (modules, i);
2791
2792 if (amodule != method->klass->image->aot_module)
2793 index = find_extra_method_in_amodule (amodule, method, name);
2794 if (index != 0xffffff) {
2795 *out_amodule = amodule;
2796 break;
2797 }
2798 }
2799
2800 g_ptr_array_free (modules, TRUE);
2801
2802 g_free (name);
2803 return index;
2804 }
2805
2806 /*
2807 * mono_aot_get_method:
2808 *
2809 * Return a pointer to the AOTed native code for METHOD if it can be found,
2810 * NULL otherwise.
2811 * On platforms with function pointers, this doesn't return a function pointer.
2812 */
2813 gpointer
2814 mono_aot_get_method (MonoDomain *domain, MonoMethod *method)
2815 {
2816 MonoClass *klass = method->klass;
2817 guint32 method_index;
2818 MonoAotModule *amodule = klass->image->aot_module;
2819 guint8 *code;
2820
2821 if (!amodule)
2822 return NULL;
2823
2824 if (amodule->out_of_date)
2825 return NULL;
2826
2827 if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
2828 (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
2829 (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
2830 (method->flags & METHOD_ATTRIBUTE_ABSTRACT))
2831 return NULL;
2832
2833 /*
2834 * Use the original method instead of its invoke-with-check wrapper.
2835 * This is not a problem when using full-aot, since it doesn't support
2836 * remoting.
2837 */
2838 if (mono_aot_only && method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK)
2839 return mono_aot_get_method (domain, mono_marshal_method_from_wrapper (method));
2840
2841 g_assert (klass->inited);
2842
2843 /* Find method index */
2844 if (method->is_inflated && mono_method_is_generic_sharable_impl (method, FALSE)) {
2845 method = mono_method_get_declaring_generic_method (method);
2846 method_index = mono_metadata_token_index (method->token) - 1;
2847 } else if (method->is_inflated || !method->token) {
2848 /* This hash table is used to avoid the slower search in the extra_method_table in the AOT image */
2849 mono_aot_lock ();
2850 code = g_hash_table_lookup (amodule->method_to_code, method);
2851 mono_aot_unlock ();
2852 if (code)
2853 return code;
2854
2855 method_index = find_extra_method (method, &amodule);
2856 /*
2857 * Special case the ICollection<T> wrappers for arrays, as they cannot
2858 * be statically enumerated, and each wrapper ends up calling the same
2859 * method in Array.
2860 */
2861 if (method_index == 0xffffff && method->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED && method->klass->rank && strstr (method->name, "System.Collections.Generic")) {
2862 MonoMethod *m = mono_aot_get_array_helper_from_wrapper (method);
2863
2864 code = mono_aot_get_method (domain, m);
2865 if (code) {
2866 if (mono_method_needs_static_rgctx_invoke (m, FALSE)) {
2867 code = mono_create_static_rgctx_trampoline (m, mono_create_ftnptr (domain, code));
2868 /* The call above returns an ftnptr */
2869 code = mono_get_addr_from_ftnptr (code);
2870 }
2871
2872 return code;
2873 }
2874 }
2875
2876 /*
2877 * Special case Array.GetGenericValueImpl which is a generic icall.
2878 * Generic sharing currently can't handle it, but the icall returns data using
2879 * an out parameter, so the managed-to-native wrappers can share the same code.
2880 */
2881 if (method_index == 0xffffff && method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE && method->klass == mono_defaults.array_class && !strcmp (method->name, "GetGenericValueImpl")) {
2882 MonoMethod *m;
2883 MonoGenericContext ctx;
2884 MonoType *args [16];
2885
2886 if (mono_method_signature (method)->params [1]->type == MONO_TYPE_OBJECT)
2887 /* Avoid recursion */
2888 return NULL;
2889
2890 m = mono_class_get_method_from_name (mono_defaults.array_class, "GetGenericValueImpl", 2);
2891 g_assert (m);
2892
2893 memset (&ctx, 0, sizeof (ctx));
2894 args [0] = &mono_defaults.object_class->byval_arg;
2895 ctx.method_inst = mono_metadata_get_generic_inst (1, args);
2896
2897 m = mono_marshal_get_native_wrapper (mono_class_inflate_generic_method (m, &ctx), TRUE, TRUE);
2898
2899 /*
2900 * Get the code for the <object> instantiation which should be emitted into
2901 * the mscorlib aot image by the AOT compiler.
2902 */
2903 code = mono_aot_get_method (domain, m);
2904 if (code)
2905 return code;
2906 }
2907
2908 if (method_index == 0xffffff) {
2909 if (mono_aot_only && mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
2910 char *full_name;
2911
2912 full_name = mono_method_full_name (method, TRUE);
2913 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT NOT FOUND: %s.\n", full_name);
2914 g_free (full_name);
2915 }
2916 return NULL;
2917 }
2918
2919 if (method_index == 0xffffff)
2920 return NULL;
2921
2922 /* Needed by find_jit_info */
2923 mono_aot_lock ();
2924 if (!amodule->extra_methods)
2925 amodule->extra_methods = g_hash_table_new (NULL, NULL);
2926 g_hash_table_insert (amodule->extra_methods, GUINT_TO_POINTER (method_index), method);
2927 mono_aot_unlock ();
2928 } else {
2929 /* Common case */
2930 method_index = mono_metadata_token_index (method->token) - 1;
2931 }
2932
2933 return load_method (domain, amodule, klass->image, method, method->token, method_index);
2934 }
2935
2936 /**
2937 * Same as mono_aot_get_method, but we try to avoid loading any metadata from the
2938 * method.
2939 */
2940 gpointer
2941 mono_aot_get_method_from_token (MonoDomain *domain, MonoImage *image, guint32 token)
2942 {
2943 MonoAotModule *aot_module = image->aot_module;
2944 int method_index;
2945
2946 if (!aot_module)
2947 return NULL;
2948
2949 method_index = mono_metadata_token_index (token) - 1;
2950
2951 return load_method (domain, aot_module, image, NULL, token, method_index);
2952 }
2953
2954 typedef struct {
2955 guint8 *addr;
2956 gboolean res;
2957 } IsGotEntryUserData;
2958
2959 static void
2960 check_is_got_entry (gpointer key, gpointer value, gpointer user_data)
2961 {
2962 IsGotEntryUserData *data = (IsGotEntryUserData*)user_data;
2963 MonoAotModule *aot_module = (MonoAotModule*)value;
2964
2965 if (aot_module->got && (data->addr >= (guint8*)(aot_module->got)) && (data->addr < (guint8*)(aot_module->got + aot_module->info.got_size)))
2966 data->res = TRUE;
2967 }
2968
2969 gboolean
2970 mono_aot_is_got_entry (guint8 *code, guint8 *addr)
2971 {
2972 IsGotEntryUserData user_data;
2973
2974 if (!aot_modules)
2975 return FALSE;
2976
2977 user_data.addr = addr;
2978 user_data.res = FALSE;
2979 mono_aot_lock ();
2980 g_hash_table_foreach (aot_modules, check_is_got_entry, &user_data);
2981 mono_aot_unlock ();
2982
2983 return user_data.res;
2984 }
2985
2986 typedef struct {
2987 guint8 *addr;
2988 MonoAotModule *module;
2989 } FindAotModuleUserData;
2990
2991 static void
2992 find_aot_module_cb (gpointer key, gpointer value, gpointer user_data)
2993 {
2994 FindAotModuleUserData *data = (FindAotModuleUserData*)user_data;
2995 MonoAotModule *aot_module = (MonoAotModule*)value;
2996
2997 if ((data->addr >= (guint8*)(aot_module->code)) && (data->addr < (guint8*)(aot_module->code_end)))
2998 data->module = aot_module;
2999 }
3000
3001 static inline MonoAotModule*
3002 find_aot_module (guint8 *code)
3003 {
3004 FindAotModuleUserData user_data;
3005
3006 if (!aot_modules)
3007 return NULL;
3008
3009 /* Reading these need no locking */
3010 if (((gsize)code < aot_code_low_addr) || ((gsize)code > aot_code_high_addr))
3011 return NULL;
3012
3013 user_data.addr = code;
3014 user_data.module = NULL;
3015
3016 mono_aot_lock ();
3017 g_hash_table_foreach (aot_modules, find_aot_module_cb, &user_data);
3018 mono_aot_unlock ();
3019
3020 return user_data.module;
3021 }
3022
3023 /*
3024 * mono_aot_plt_resolve:
3025 *
3026 * This function is called by the entries in the PLT to resolve the actual method that
3027 * needs to be called. It returns a trampoline to the method and patches the PLT entry.
3028 * Returns NULL if the something cannot be loaded.
3029 */
3030 gpointer
3031 mono_aot_plt_resolve (gpointer aot_module, guint32 plt_info_offset, guint8 *code)
3032 {
3033 #ifdef MONO_ARCH_AOT_SUPPORTED
3034 guint8 *p, *target, *plt_entry;
3035 MonoJumpInfo ji;
3036 MonoAotModule *module = (MonoAotModule*)aot_module;
3037 gboolean res, no_ftnptr = FALSE;
3038 MonoMemPool *mp;
3039
3040 //printf ("DYN: %p %d\n", aot_module, plt_info_offset);
3041
3042 p = &module->blob [plt_info_offset];
3043
3044 ji.type = decode_value (p, &p);
3045
3046 mp = mono_mempool_new_size (512);
3047 res = decode_patch (module, mp, &ji, p, &p);
3048
3049 if (!res) {
3050 mono_mempool_destroy (mp);
3051 return NULL;
3052 }
3053
3054 /*
3055 * Avoid calling resolve_patch_target in the full-aot case if possible, since
3056 * it would create a trampoline, and we don't need that.
3057 * We could do this only if the method does not need the special handling
3058 * in mono_magic_trampoline ().
3059 */
3060 if (mono_aot_only && ji.type == MONO_PATCH_INFO_METHOD && !ji.data.method->is_generic && !mono_method_check_context_used (ji.data.method) && !(ji.data.method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) &&
3061 !mono_method_needs_static_rgctx_invoke (ji.data.method, FALSE)) {
3062 target = mono_jit_compile_method (ji.data.method);
3063 no_ftnptr = TRUE;
3064 } else {
3065 target = mono_resolve_patch_target (NULL, mono_domain_get (), NULL, &ji, TRUE);
3066 }
3067
3068 /*
3069 * The trampoline expects us to return a function descriptor on platforms which use
3070 * it, but resolve_patch_target returns a direct function pointer for some type of
3071 * patches, so have to translate between the two.
3072 * FIXME: Clean this up, but how ?
3073 */
3074 if (ji.type == MONO_PATCH_INFO_ABS || ji.type == MONO_PATCH_INFO_INTERNAL_METHOD || ji.type == MONO_PATCH_INFO_CLASS_INIT || ji.type == MONO_PATCH_INFO_ICALL_ADDR || ji.type == MONO_PATCH_INFO_JIT_ICALL_ADDR || ji.type == MONO_PATCH_INFO_RGCTX_FETCH) {
3075 /* These should already have a function descriptor */
3076 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
3077 /* Our function descriptors have a 0 environment, gcc created ones don't */
3078 if (ji.type != MONO_PATCH_INFO_INTERNAL_METHOD && ji.type != MONO_PATCH_INFO_JIT_ICALL_ADDR && ji.type != MONO_PATCH_INFO_ICALL_ADDR)
3079 g_assert (((gpointer*)target) [2] == 0);
3080 #endif
3081 /* Empty */
3082 } else if (!no_ftnptr) {
3083 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
3084 g_assert (((gpointer*)target) [2] != 0);
3085 #endif
3086 target = mono_create_ftnptr (mono_domain_get (), target);
3087 }
3088
3089 mono_mempool_destroy (mp);
3090
3091 /* Patch the PLT entry with target which might be the actual method not a trampoline */
3092 plt_entry = mono_aot_get_plt_entry (code);
3093 g_assert (plt_entry);
3094 mono_arch_patch_plt_entry (plt_entry, module->got, NULL, target);
3095
3096 return target;
3097 #else
3098 g_assert_not_reached ();
3099 return NULL;
3100 #endif
3101 }
3102
3103 /**
3104 * init_plt:
3105 *
3106 * Initialize the PLT table of the AOT module. Called lazily when the first AOT
3107 * method in the module is loaded to avoid committing memory by writing to it.
3108 * LOCKING: Assumes the AOT lock is held.
3109 */
3110 static void
3111 init_plt (MonoAotModule *amodule)
3112 {
3113 #ifndef MONO_CROSS_COMPILE
3114
3115 #ifdef MONO_ARCH_AOT_SUPPORTED
3116 #ifdef __i386__
3117 guint8 *buf = amodule->plt;
3118 #elif defined(__x86_64__) || defined(__arm__) || defined(__mono_ppc__)
3119 int i;
3120 gpointer plt_0;
3121 #endif
3122 gpointer tramp;
3123
3124 if (amodule->plt_inited)
3125 return;
3126
3127 tramp = mono_create_specific_trampoline (amodule, MONO_TRAMPOLINE_AOT_PLT, mono_get_root_domain (), NULL);
3128
3129 #ifdef __i386__
3130 /* Initialize the first PLT entry */
3131 make_writable (amodule->plt, amodule->plt_end - amodule->plt);
3132 x86_jump_code (buf, tramp);
3133 #elif defined(__x86_64__) || defined(__arm__) || defined(__mono_ppc__)
3134 /*
3135 * Initialize the PLT entries in the GOT to point to the default targets.
3136 */
3137
3138 tramp = mono_create_ftnptr (mono_domain_get (), tramp);
3139 plt_0 = mono_create_ftnptr (mono_domain_get (), amodule->plt);
3140 /* The first entry points to the AOT trampoline */
3141 ((gpointer*)amodule->got)[amodule->info.plt_got_offset_base] = tramp;
3142 for (i = 1; i < amodule->info.plt_size; ++i)
3143 /* All the default entries point to the first entry */
3144 ((gpointer*)amodule->got)[amodule->info.plt_got_offset_base + i] = plt_0;
3145 #else
3146 g_assert_not_reached ();
3147 #endif
3148
3149 amodule->plt_inited = TRUE;
3150 #endif
3151
3152 #endif /* MONO_CROSS_COMPILE */
3153 }
3154
3155 /*
3156 * mono_aot_get_plt_entry:
3157 *
3158 * Return the address of the PLT entry called by the code at CODE if exists.
3159 */
3160 guint8*
3161 mono_aot_get_plt_entry (guint8 *code)
3162 {
3163 MonoAotModule *aot_module = find_aot_module (code);
3164 #if defined(__arm__) || defined(__mono_ppc__)
3165 guint32 ins;
3166 #endif
3167
3168 if (!aot_module)
3169 return NULL;
3170
3171 #if defined(__i386__) || defined(__x86_64__)
3172 if (code [-5] == 0xe8) {
3173 guint32 disp = *(guint32*)(code - 4);
3174 guint8 *target = code + disp;
3175
3176 if ((target >= (guint8*)(aot_module->plt)) && (target < (guint8*)(aot_module->plt_end)))
3177 return target;
3178 }
3179 #elif defined(__arm__)
3180 ins = ((guint32*)(gpointer)code) [-1];
3181
3182 /* Should be a 'bl' */
3183 if ((((ins >> 25) & 0x7) == 0x5) && (((ins >> 24) & 0x1) == 0x1)) {
3184 gint32 disp = ((gint32)ins) & 0xffffff;
3185 guint8 *target = code - 4 + 8 + (disp * 4);
3186
3187 if ((target >= (guint8*)(aot_module->plt)) && (target < (guint8*)(aot_module->plt_end)))
3188 return target;
3189 }
3190 #elif defined(__mono_ppc__)
3191 /* Should be a bl */
3192 ins = ((guint32*)(gpointer)code) [-1];
3193
3194 if ((ins >> 26 == 18) && ((ins & 1) == 1) && ((ins & 2) == 0)) {
3195 gint32 disp = (((gint32)ins) >> 2) & 0xffffff;
3196 guint8 *target = code - 4 + (disp * 4);
3197
3198 if ((target >= (guint8*)(aot_module->plt)) && (target < (guint8*)(aot_module->plt_end)))
3199 return target;
3200 }
3201 #else
3202 g_assert_not_reached ();
3203 #endif
3204
3205 return NULL;
3206 }
3207
3208 /*
3209 * mono_aot_get_plt_info_offset:
3210 *
3211 * Return the PLT info offset belonging to the plt entry called by CODE.
3212 */
3213 guint32
3214 mono_aot_get_plt_info_offset (mgreg_t *regs, guint8 *code)
3215 {
3216 guint8 *plt_entry = mono_aot_get_plt_entry (code);
3217
3218 g_assert (plt_entry);
3219
3220 /* The offset is embedded inside the code after the plt entry */
3221 #if defined(__i386__)
3222 return *(guint32*)(plt_entry + 5);
3223 #elif defined(__x86_64__)
3224 return *(guint32*)(plt_entry + 6);
3225 #elif defined(__arm__)
3226 /* The offset is stored as the 4th word of the plt entry */
3227 return ((guint32*)plt_entry) [3];
3228 #elif defined(__mono_ppc__)
3229 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
3230 return ((guint32*)plt_entry) [8];
3231 #else
3232 return ((guint32*)plt_entry) [6];
3233 #endif
3234 #else
3235 g_assert_not_reached ();
3236 return 0;
3237 #endif
3238 }
3239
3240 static gpointer
3241 mono_create_ftnptr_malloc (guint8 *code)
3242 {
3243 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
3244 MonoPPCFunctionDescriptor *ftnptr = g_malloc0 (sizeof (MonoPPCFunctionDescriptor));
3245
3246 ftnptr->code = code;
3247 ftnptr->toc = NULL;
3248 ftnptr->env = NULL;
3249
3250 return ftnptr;
3251 #else
3252 return code;
3253 #endif
3254 }
3255
3256 /*
3257 * load_function:
3258 *
3259 * Load the function named NAME from the aot image.
3260 */
3261 static gpointer
3262 load_function (MonoAotModule *amodule, const char *name)
3263 {
3264 char *symbol;
3265 guint8 *p;
3266 int n_patches, pindex;
3267 MonoMemPool *mp;
3268 gpointer code;
3269
3270 /* Load the code */
3271
3272 symbol = g_strdup_printf ("%s", name);
3273 find_symbol (amodule->sofile, amodule->globals, symbol, (gpointer *)&code);
3274 g_free (symbol);
3275 if (!code)
3276 g_error ("Symbol '%s' not found in AOT file '%s'.\n", name, amodule->aot_name);
3277
3278 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT FOUND function '%s' in AOT file '%s'.\n", name, amodule->aot_name);
3279
3280 /* Load info */
3281
3282 symbol = g_strdup_printf ("%s_p", name);
3283 find_symbol (amodule->sofile, amodule->globals, symbol, (gpointer *)&p);
3284 g_free (symbol);
3285 if (!p)
3286 /* Nothing to patch */
3287 return code;
3288
3289 p = amodule->blob + *(guint32*)p;
3290
3291 /* Similar to mono_aot_load_method () */
3292
3293 n_patches = decode_value (p, &p);
3294
3295 if (n_patches) {
3296 MonoJumpInfo *patches;
3297 guint32 *got_slots;
3298
3299 mp = mono_mempool_new ();
3300
3301 patches = load_patch_info (amodule, mp, n_patches, &got_slots, p, &p);
3302 g_assert (patches);
3303
3304 for (pindex = 0; pindex < n_patches; ++pindex) {
3305 MonoJumpInfo *ji = &patches [pindex];
3306 gpointer target;
3307
3308 if (amodule->got [got_slots [pindex]])
3309 continue;
3310
3311 /*
3312 * When this code is executed, the runtime may not be initalized yet, so
3313 * resolve the patch info by hand.
3314 */
3315 if (ji->type == MONO_PATCH_INFO_JIT_ICALL_ADDR) {
3316 if (!strcmp (ji->data.name, "mono_get_lmf_addr")) {
3317 target = mono_get_lmf_addr;
3318 } else if (!strcmp (ji->data.name, "mono_thread_force_interruption_checkpoint")) {
3319 target = mono_thread_force_interruption_checkpoint;
3320 } else if (!strcmp (ji->data.name, "mono_exception_from_token")) {
3321 target = mono_exception_from_token;
3322 } else if (!strcmp (ji->data.name, "mono_throw_exception")) {
3323 target = mono_get_throw_exception ();
3324 #ifdef __x86_64__
3325 } else if (!strcmp (ji->data.name, "mono_amd64_throw_exception")) {
3326 target = mono_amd64_throw_exception;
3327 #endif
3328 #ifdef __x86_64__
3329 } else if (!strcmp (ji->data.name, "mono_amd64_get_original_ip")) {
3330 target = mono_amd64_get_original_ip;
3331 #endif
3332 #ifdef __arm__
3333 } else if (!strcmp (ji->data.name, "mono_arm_throw_exception")) {
3334 target = mono_arm_throw_exception;
3335 } else if (!strcmp (ji->data.name, "mono_arm_throw_exception_by_token")) {
3336 target = mono_arm_throw_exception_by_token;
3337 #endif
3338 #ifdef __mono_ppc__
3339 } else if (!strcmp (ji->data.name, "mono_ppc_throw_exception")) {
3340 target = mono_ppc_throw_exception;
3341 #endif
3342 } else if (strstr (ji->data.name, "trampoline_func_") == ji->data.name) {
3343 int tramp_type2 = atoi (ji->data.name + strlen ("trampoline_func_"));
3344 target = (gpointer)mono_get_trampoline_func (tramp_type2);
3345 } else if (strstr (ji->data.name, "specific_trampoline_lazy_fetch_") == ji->data.name) {
3346 /* atoll is needed because the the offset is unsigned */
3347 guint32 slot;
3348 int res;
3349
3350 res = sscanf (ji->data.name, "specific_trampoline_lazy_fetch_%u", &slot);
3351 g_assert (res == 1);
3352 target = mono_create_specific_trampoline (GUINT_TO_POINTER (slot), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), NULL);
3353 target = mono_create_ftnptr_malloc (target);
3354 } else if (!strcmp (ji->data.name, "specific_trampoline_monitor_enter")) {
3355 target = mono_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_ENTER, mono_get_root_domain (), NULL);
3356 target = mono_create_ftnptr_malloc (target);
3357 } else if (!strcmp (ji->data.name, "specific_trampoline_monitor_exit")) {
3358 target = mono_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_EXIT, mono_get_root_domain (), NULL);
3359 target = mono_create_ftnptr_malloc (target);
3360 } else if (!strcmp (ji->data.name, "specific_trampoline_generic_class_init")) {
3361 target = mono_create_specific_trampoline (NULL, MONO_TRAMPOLINE_GENERIC_CLASS_INIT, mono_get_root_domain (), NULL);
3362 target = mono_create_ftnptr_malloc (target);
3363 } else if (!strcmp (ji->data.name, "mono_thread_get_and_clear_pending_exception")) {
3364 target = mono_thread_get_and_clear_pending_exception;
3365 } else {
3366 fprintf (stderr, "Unknown relocation '%s'\n", ji->data.name);
3367 g_assert_not_reached ();
3368 target = NULL;
3369 }
3370 } else {
3371 /* Hopefully the code doesn't have patches which need method or
3372 * domain to be set.
3373 */
3374 target = mono_resolve_patch_target (NULL, NULL, code, ji, FALSE);
3375 g_assert (target);
3376 }
3377
3378 amodule->got [got_slots [pindex]] = target;
3379 }
3380
3381 g_free (got_slots);
3382
3383 mono_mempool_destroy (mp);
3384 }
3385
3386 return code;
3387 }
3388
3389 /*
3390 * Return the piece of code identified by NAME from the mscorlib AOT file.
3391 * On ppc64, this returns a function descriptor.
3392 */
3393 gpointer
3394 mono_aot_get_named_code (const char *name)
3395 {
3396 MonoImage *image;
3397 MonoAotModule *amodule;
3398
3399 image = mono_defaults.corlib;
3400 g_assert (image);
3401
3402 amodule = image->aot_module;
3403 g_assert (amodule);
3404
3405 return mono_create_ftnptr_malloc (load_function (amodule, name));
3406 }
3407
3408 /* Return a given kind of trampoline */
3409 static gpointer
3410 get_numerous_trampoline (MonoAotTrampoline tramp_type, int n_got_slots, MonoAotModule **out_amodule, guint32 *got_offset, guint32 *out_tramp_size)
3411 {
3412 MonoAotModule *amodule;
3413 int index, tramp_size;
3414 MonoImage *image;
3415
3416 /* Currently, we keep all trampolines in the mscorlib AOT image */
3417 image = mono_defaults.corlib;
3418 g_assert (image);
3419
3420 mono_aot_lock ();
3421
3422 amodule = image->aot_module;
3423 g_assert (amodule);
3424
3425 *out_amodule = amodule;
3426
3427 if (amodule->trampoline_index [tramp_type] == amodule->info.num_trampolines [tramp_type])
3428 g_error ("Ran out of trampolines of type %d in '%s' (%d)\n", tramp_type, image->name, amodule->info.num_trampolines [tramp_type]);
3429
3430 index = amodule->trampoline_index [tramp_type] ++;
3431
3432 mono_aot_unlock ();
3433
3434 *got_offset = amodule->info.trampoline_got_offset_base [tramp_type] + (index * n_got_slots);
3435
3436 tramp_size = amodule->info.trampoline_size [tramp_type];
3437
3438 if (out_tramp_size)
3439 *out_tramp_size = tramp_size;
3440
3441 return amodule->trampolines [tramp_type] + (index * tramp_size);
3442 }
3443
3444 /*
3445 * Return a specific trampoline from the AOT file.
3446 */
3447 gpointer
3448 mono_aot_create_specific_trampoline (MonoImage *image, gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
3449 {
3450 MonoAotModule *amodule;
3451 guint32 got_offset, tramp_size;
3452 guint8 *code, *tramp;
3453 static gpointer generic_trampolines [MONO_TRAMPOLINE_NUM];
3454 static gboolean inited;
3455 static guint32 num_trampolines;
3456
3457 if (!inited) {
3458 mono_aot_lock ();
3459
3460 if (!inited) {
3461 mono_counters_register ("Specific trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &num_trampolines);
3462 inited = TRUE;
3463 }
3464
3465 mono_aot_unlock ();
3466 }
3467
3468 num_trampolines ++;
3469
3470 if (!generic_trampolines [tramp_type]) {
3471 char *symbol;
3472
3473 symbol = g_strdup_printf ("generic_trampoline_%d", tramp_type);
3474 generic_trampolines [tramp_type] = mono_aot_get_named_code (symbol);
3475 g_free (symbol);
3476 }
3477
3478 tramp = generic_trampolines [tramp_type];
3479 g_assert (tramp);
3480
3481 code = get_numerous_trampoline (MONO_AOT_TRAMP_SPECIFIC, 2, &amodule, &got_offset, &tramp_size);
3482
3483 amodule->got [got_offset] = tramp;
3484 amodule->got [got_offset + 1] = arg1;
3485
3486 if (code_len)
3487 *code_len = tramp_size;
3488
3489 return code;
3490 }
3491
3492 gpointer
3493 mono_aot_get_static_rgctx_trampoline (gpointer ctx, gpointer addr)
3494 {
3495 MonoAotModule *amodule;
3496 guint8 *code;
3497 guint32 got_offset;
3498
3499 code = get_numerous_trampoline (MONO_AOT_TRAMP_STATIC_RGCTX, 2, &amodule, &got_offset, NULL);
3500
3501 amodule->got [got_offset] = ctx;
3502 amodule->got [got_offset + 1] = addr;
3503
3504 /* The caller expects an ftnptr */
3505 return mono_create_ftnptr (mono_domain_get (), code);
3506 }
3507
3508 gpointer
3509 mono_aot_get_unbox_trampoline (MonoMethod *method)
3510 {
3511 guint32 method_index = mono_metadata_token_index (method->token) - 1;
3512 MonoAotModule *amodule;
3513 char *symbol;
3514 gpointer code;
3515
3516 if (method->is_inflated && !mono_method_is_generic_sharable_impl (method, FALSE)) {
3517 guint32 index = find_extra_method (method, &amodule);
3518 g_assert (index != 0xffffff);
3519
3520 symbol = g_strdup_printf ("ut_e_%d", index);
3521 } else {
3522 amodule = method->klass->image->aot_module;
3523 g_assert (amodule);
3524
3525 symbol = g_strdup_printf ("ut_%d", method_index);
3526 }
3527 code = load_function (amodule, symbol);
3528 g_free (symbol);
3529
3530 /* The caller expects an ftnptr */
3531 return mono_create_ftnptr (mono_domain_get (), code);
3532 }
3533
3534 gpointer
3535 mono_aot_get_lazy_fetch_trampoline (guint32 slot)
3536 {
3537 char *symbol;
3538 gpointer code;
3539
3540 symbol = g_strdup_printf ("rgctx_fetch_trampoline_%u", slot);
3541 code = load_function (mono_defaults.corlib->aot_module, symbol);
3542 g_free (symbol);
3543 /* The caller expects an ftnptr */
3544 return mono_create_ftnptr (mono_domain_get (), code);
3545 }
3546
3547 gpointer
3548 mono_aot_get_imt_thunk (MonoVTable *vtable, MonoDomain *domain, MonoIMTCheckItem **imt_entries, int count, gpointer fail_tramp)
3549 {
3550 guint32 got_offset;
3551 gpointer code;
3552 gpointer *buf;
3553 int i;
3554 MonoAotModule *amodule;
3555
3556 code = get_numerous_trampoline (MONO_AOT_TRAMP_IMT_THUNK, 1, &amodule, &got_offset, NULL);
3557
3558 /* Save the entries into an array */
3559 buf = mono_domain_alloc (domain, (count + 1) * 2 * sizeof (gpointer));
3560 for (i = 0; i < count; ++i) {
3561 MonoIMTCheckItem *item = imt_entries [i];
3562
3563 g_assert (item->key);
3564 /* FIXME: */
3565 g_assert (!item->has_target_code);
3566
3567 buf [(i * 2)] = item->key;
3568 buf [(i * 2) + 1] = &(vtable->vtable [item->value.vtable_slot]);
3569 }
3570 buf [(count * 2)] = NULL;
3571 buf [(count * 2) + 1] = fail_tramp;
3572
3573 amodule->got [got_offset] = buf;
3574
3575 return code;
3576 }
3577
3578 #else
3579 /* AOT disabled */
3580
3581 void
3582 mono_aot_init (void)
3583 {
3584 }
3585
3586 gpointer
3587 mono_aot_get_method (MonoDomain *domain, MonoMethod *method)
3588 {
3589 return NULL;
3590 }
3591
3592 gboolean
3593 mono_aot_is_got_entry (guint8 *code, guint8 *addr)
3594 {
3595 return FALSE;
3596 }
3597
3598 gboolean
3599 mono_aot_get_cached_class_info (MonoClass *klass, MonoCachedClassInfo *res)
3600 {
3601 return FALSE;
3602 }
3603
3604 gboolean
3605 mono_aot_get_class_from_name (MonoImage *image, const char *name_space, const char *name, MonoClass **klass)
3606 {
3607 return FALSE;
3608 }
3609
3610 MonoJitInfo *
3611 mono_aot_find_jit_info (MonoDomain *domain, MonoImage *image, gpointer addr)
3612 {
3613 return NULL;
3614 }
3615
3616 gpointer
3617 mono_aot_get_method_from_token (MonoDomain *domain, MonoImage *image, guint32 token)
3618 {
3619 return NULL;
3620 }
3621
3622 guint8*
3623 mono_aot_get_plt_entry (guint8 *code)
3624 {
3625 return NULL;
3626 }
3627
3628 gpointer
3629 mono_aot_plt_resolve (gpointer aot_module, guint32 plt_info_offset, guint8 *code)
3630 {
3631 return NULL;
3632 }
3633
3634 gpointer
3635 mono_aot_get_method_from_vt_slot (MonoDomain *domain, MonoVTable *vtable, int slot)
3636 {
3637 return NULL;
3638 }
3639
3640 guint32
3641 mono_aot_get_plt_info_offset (mgreg_t *regs, guint8 *code)
3642 {
3643 g_assert_not_reached ();
3644
3645 return 0;
3646 }
3647
3648 gpointer
3649 mono_aot_create_specific_trampoline (MonoImage *image, gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
3650 {
3651 g_assert_not_reached ();
3652 return NULL;
3653 }
3654
3655 gpointer
3656 mono_aot_get_static_rgctx_trampoline (gpointer ctx, gpointer addr)
3657 {
3658 g_assert_not_reached ();
3659 return NULL;
3660 }
3661
3662 gpointer
3663 mono_aot_get_named_code (const char *name)
3664 {
3665 g_assert_not_reached ();
3666 return NULL;
3667 }
3668
3669 gpointer
3670 mono_aot_get_unbox_trampoline (MonoMethod *method)
3671 {
3672 g_assert_not_reached ();
3673 return NULL;
3674 }
3675
3676 gpointer
3677 mono_aot_get_lazy_fetch_trampoline (guint32 slot)
3678 {
3679 g_assert_not_reached ();
3680 return NULL;
3681 }
3682
3683 gpointer
3684 mono_aot_get_imt_thunk (MonoVTable *vtable, MonoDomain *domain, MonoIMTCheckItem **imt_entries, int count, gpointer fail_tramp)
3685 {
3686 g_assert_not_reached ();
3687 return NULL;
3688 }
3689
3690 guint8*
3691 mono_aot_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
3692 {
3693 g_assert_not_reached ();
3694 return NULL;
3695 }
3696
3697 #endif
ppc64 and Haiku ports