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[mono.git] / mono / mini / aot-runtime.c
blob0fdcff0395da9b5ce8c88916eaa51df9cf0312cd
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_STELEMREF:
590 *method = mono_marshal_get_stelemref ();
591 break;
592 case MONO_WRAPPER_SYNCHRONIZED: {
593 MonoMethod *m = decode_method_ref_2 (module, p, &p);
594
595 if (!m)
596 return NULL;
597 *method = mono_marshal_get_synchronized_wrapper (m);
598 break;
599 }
600 case MONO_WRAPPER_UNKNOWN: {
601 MonoMethodDesc *desc;
602 MonoMethod *orig_method;
603 int subtype = decode_value (p, &p);
604
605 if (subtype == MONO_AOT_WRAPPER_MONO_ENTER)
606 desc = mono_method_desc_new ("Monitor:Enter", FALSE);
607 else if (subtype == MONO_AOT_WRAPPER_MONO_EXIT)
608 desc = mono_method_desc_new ("Monitor:Exit", FALSE);
609 else
610 g_assert_not_reached ();
611 orig_method = mono_method_desc_search_in_class (desc, mono_defaults.monitor_class);
612 g_assert (orig_method);
613 mono_method_desc_free (desc);
614 *method = mono_monitor_get_fast_path (orig_method);
615 break;
616 }
617 case MONO_WRAPPER_RUNTIME_INVOKE: {
618 /* Direct wrapper */
619 MonoMethod *m = decode_method_ref_2 (module, p, &p);
620
621 if (!m)
622 return NULL;
623 *method = mono_marshal_get_runtime_invoke (m, FALSE);
624 break;
625 }
626 default:
627 g_assert_not_reached ();
628 }
629 } else if (image_index == MONO_AOT_METHODREF_WRAPPER_NAME) {
630 /* Can't decode these */
631 g_assert_not_reached ();
632 } else if (image_index == MONO_AOT_METHODREF_METHODSPEC) {
633 image_index = decode_value (p, &p);
634 *token = decode_value (p, &p);
635
636 image = load_image (module, image_index, TRUE);
637 if (!image)
638 return NULL;
639 } else if (image_index == MONO_AOT_METHODREF_GINST) {
640 MonoClass *klass;
641 MonoGenericContext ctx;
642
643 /*
644 * These methods do not have a token which resolves them, so we
645 * resolve them immediately.
646 */
647 klass = decode_klass_ref (module, p, &p);
648 if (!klass)
649 return NULL;
650
651 image_index = decode_value (p, &p);
652 *token = decode_value (p, &p);
653
654 image = load_image (module, image_index, TRUE);
655 if (!image)
656 return NULL;
657
658 *method = mono_get_method_full (image, *token, NULL, NULL);
659 if (!(*method))
660 return NULL;
661
662 memset (&ctx, 0, sizeof (ctx));
663
664 if (FALSE && klass->generic_class) {
665 ctx.class_inst = klass->generic_class->context.class_inst;
666 ctx.method_inst = NULL;
667
668 *method = mono_class_inflate_generic_method_full (*method, klass, &ctx);
669 }
670
671 memset (&ctx, 0, sizeof (ctx));
672
673 if (!decode_generic_context (module, &ctx, p, &p))
674 return NULL;
675
676 *method = mono_class_inflate_generic_method_full (*method, klass, &ctx);
677 } else if (image_index == MONO_AOT_METHODREF_ARRAY) {
678 MonoClass *klass;
679 int method_type;
680
681 klass = decode_klass_ref (module, p, &p);
682 if (!klass)
683 return NULL;
684 method_type = decode_value (p, &p);
685 *token = 0;
686 switch (method_type) {
687 case 0:
688 *method = mono_class_get_method_from_name (klass, ".ctor", klass->rank);
689 break;
690 case 1:
691 *method = mono_class_get_method_from_name (klass, ".ctor", klass->rank * 2);
692 break;
693 case 2:
694 *method = mono_class_get_method_from_name (klass, "Get", -1);
695 break;
696 case 3:
697 *method = mono_class_get_method_from_name (klass, "Address", -1);
698 break;
699 case 4:
700 *method = mono_class_get_method_from_name (klass, "Set", -1);
701 break;
702 default:
703 g_assert_not_reached ();
704 }
705 } else {
706 g_assert (image_index < MONO_AOT_METHODREF_MIN);
707 *token = MONO_TOKEN_METHOD_DEF | (value & 0xffffff);
708
709 image = load_image (module, image_index, TRUE);
710 if (!image)
711 return NULL;
712 }
713
714 *endbuf = p;
715
716 return image;
717 }
718
719 /*
720 * decode_method_ref_2:
721 *
722 * Similar to decode_method_ref, but resolve and return the method itself.
723 */
724 static MonoMethod*
725 decode_method_ref_2 (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
726 {
727 MonoMethod *method;
728 guint32 token;
729 MonoImage *image = decode_method_ref (module, &token, &method, NULL, buf, endbuf);
730
731 if (method)
732 return method;
733 if (!image)
734 return NULL;
735 method = mono_get_method (image, token, NULL);
736 return method;
737 }
738
739 G_GNUC_UNUSED
740 static void
741 make_writable (guint8* addr, guint32 len)
742 {
743 guint8 *page_start;
744 int pages, err;
745
746 if (mono_aot_only)
747 g_error ("Attempt to make AOT memory writable while running in aot-only mode.\n");
748
749 page_start = (guint8 *) (((gssize) (addr)) & ~ (mono_pagesize () - 1));
750 pages = (addr + len - page_start + mono_pagesize () - 1) / mono_pagesize ();
751
752 err = mono_mprotect (page_start, pages * mono_pagesize (), MONO_MMAP_READ | MONO_MMAP_WRITE | MONO_MMAP_EXEC);
753 g_assert (err == 0);
754 }
755
756 static void
757 create_cache_structure (void)
758 {
759 const char *home;
760 char *tmp;
761 int err;
762
763 home = g_get_home_dir ();
764 if (!home)
765 return;
766
767 tmp = g_build_filename (home, ".mono", NULL);
768 if (!g_file_test (tmp, G_FILE_TEST_IS_DIR)) {
769 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT creating directory %s", tmp);
770 #ifdef HOST_WIN32
771 err = mkdir (tmp);
772 #else
773 err = mkdir (tmp, 0777);
774 #endif
775 if (err) {
776 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT failed: %s", g_strerror (errno));
777 g_free (tmp);
778 return;
779 }
780 }
781 g_free (tmp);
782 tmp = g_build_filename (home, ".mono", "aot-cache", NULL);
783 if (!g_file_test (tmp, G_FILE_TEST_IS_DIR)) {
784 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT creating directory %s", tmp);
785 #ifdef HOST_WIN32
786 err = mkdir (tmp);
787 #else
788 err = mkdir (tmp, 0777);
789 #endif
790 if (err) {
791 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT failed: %s", g_strerror (errno));
792 g_free (tmp);
793 return;
794 }
795 }
796 g_free (tmp);
797 }
798
799 /*
800 * load_aot_module_from_cache:
801 *
802 * Experimental code to AOT compile loaded assemblies on demand.
803 *
804 * FIXME:
805 * - Add environment variable MONO_AOT_CACHE_OPTIONS
806 * - Add options for controlling the cache size
807 * - Handle full cache by deleting old assemblies lru style
808 * - Add options for excluding assemblies during development
809 * - Maybe add a threshold after an assembly is AOT compiled
810 * - invoking a new mono process is a security risk
811 * - recompile the AOT module if one of its dependencies changes
812 */
813 static MonoDl*
814 load_aot_module_from_cache (MonoAssembly *assembly, char **aot_name)
815 {
816 char *fname, *cmd, *tmp2, *aot_options;
817 const char *home;
818 MonoDl *module;
819 gboolean res;
820 gchar *out, *err;
821 gint exit_status;
822
823 *aot_name = NULL;
824
825 if (assembly->image->dynamic)
826 return NULL;
827
828 create_cache_structure ();
829
830 home = g_get_home_dir ();
831
832 tmp2 = g_strdup_printf ("%s-%s%s", assembly->image->assembly_name, assembly->image->guid, SHARED_EXT);
833 fname = g_build_filename (home, ".mono", "aot-cache", tmp2, NULL);
834 *aot_name = fname;
835 g_free (tmp2);
836
837 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT trying to load from cache: '%s'.", fname);
838 module = mono_dl_open (fname, MONO_DL_LAZY, NULL);
839
840 if (!module) {
841 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT not found.");
842
843 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT precompiling assembly '%s'... ", assembly->image->name);
844
845 aot_options = g_strdup_printf ("outfile=%s", fname);
846
847 if (spawn_compiler) {
848 /* FIXME: security */
849 /* FIXME: Has to pass the assembly loading path to the child process */
850 cmd = g_strdup_printf ("mono -O=all --aot=%s %s", aot_options, assembly->image->name);
851
852 res = g_spawn_command_line_sync (cmd, &out, &err, &exit_status, NULL);
853
854 #if !defined(HOST_WIN32) && !defined(__ppc__) && !defined(__ppc64__) && !defined(__powerpc__)
855 if (res) {
856 if (!WIFEXITED (exit_status) && (WEXITSTATUS (exit_status) == 0))
857 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT failed: %s.", err);
858 else
859 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT succeeded.");
860 g_free (out);
861 g_free (err);
862 }
863 #endif
864 g_free (cmd);
865 } else {
866 res = mono_compile_assembly (assembly, mono_parse_default_optimizations (NULL), aot_options);
867 if (!res) {
868 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT failed.");
869 } else {
870 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT succeeded.");
871 }
872 }
873
874 module = mono_dl_open (fname, MONO_DL_LAZY, NULL);
875
876 g_free (aot_options);
877 }
878
879 return module;
880 }
881
882 static void
883 find_symbol (MonoDl *module, gpointer *globals, const char *name, gpointer *value)
884 {
885 if (globals) {
886 int global_index;
887 guint16 *table, *entry;
888 guint16 table_size;
889 guint32 hash;
890
891 /* The first entry points to the hash */
892 table = globals [0];
893 globals ++;
894
895 table_size = table [0];
896 table ++;
897
898 hash = mono_metadata_str_hash (name) % table_size;
899
900 entry = &table [hash * 2];
901
902 /* Search the hash for the index into the globals table */
903 global_index = -1;
904 while (entry [0] != 0) {
905 guint32 index = entry [0] - 1;
906 guint32 next = entry [1];
907
908 //printf ("X: %s %s\n", (char*)globals [index * 2], name);
909
910 if (!strcmp (globals [index * 2], name)) {
911 global_index = index;
912 break;
913 }
914
915 if (next != 0) {
916 entry = &table [next * 2];
917 } else {
918 break;
919 }
920 }
921
922 if (global_index != -1)
923 *value = globals [global_index * 2 + 1];
924 else
925 *value = NULL;
926 } else {
927 mono_dl_symbol (module, name, value);
928 }
929 }
930
931 #ifndef SHT_ARM_EXIDX
932 #define SHT_ARM_EXIDX 0x70000001
933 #endif
934
935 #ifdef HAVE_DL_ITERATE_PHDR
936 static int
937 dl_callback (struct dl_phdr_info *info, size_t size, void *data)
938 {
939 int j;
940 MonoAotModule *amodule = data;
941
942 if (!strcmp (amodule->aot_name, info->dlpi_name)) {
943 for (j = 0; j < info->dlpi_phnum; j++) {
944 if (info->dlpi_phdr [j].p_type == PT_GNU_EH_FRAME)
945 amodule->eh_frame_hdr = (guint8*)(info->dlpi_addr + info->dlpi_phdr [j].p_vaddr);
946 if (info->dlpi_phdr [j].p_type == SHT_ARM_EXIDX) {
947 amodule->arm_exidx = (guint8*)(info->dlpi_addr + info->dlpi_phdr [j].p_vaddr);
948 amodule->arm_exidx_size = info->dlpi_phdr [j].p_filesz;
949 }
950 }
951 return 1;
952 } else {
953 return 0;
954 }
955 }
956 #endif
957
958 static void
959 load_aot_module (MonoAssembly *assembly, gpointer user_data)
960 {
961 char *aot_name;
962 MonoAotModule *amodule;
963 MonoDl *sofile;
964 gboolean usable = TRUE;
965 char *saved_guid = NULL;
966 char *aot_version = NULL;
967 char *runtime_version, *build_info;
968 char *opt_flags = NULL;
969 gpointer *globals;
970 gboolean full_aot = FALSE;
971 MonoAotFileInfo *file_info = NULL;
972 int i;
973 gpointer *got_addr;
974
975 if (mono_compile_aot)
976 return;
977
978 if (assembly->image->aot_module)
979 /*
980 * Already loaded. This can happen because the assembly loading code might invoke
981 * the assembly load hooks multiple times for the same assembly.
982 */
983 return;
984
985 if (assembly->image->dynamic)
986 return;
987
988 if (mono_security_get_mode () == MONO_SECURITY_MODE_CAS)
989 return;
990
991 mono_aot_lock ();
992 if (static_aot_modules)
993 globals = g_hash_table_lookup (static_aot_modules, assembly->aname.name);
994 else
995 globals = NULL;
996 mono_aot_unlock ();
997
998 if (globals) {
999 /* Statically linked AOT module */
1000 sofile = NULL;
1001 aot_name = g_strdup_printf ("%s", assembly->aname.name);
1002 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "Found statically linked AOT module '%s'.\n", aot_name);
1003 } else {
1004 if (use_aot_cache)
1005 sofile = load_aot_module_from_cache (assembly, &aot_name);
1006 else {
1007 char *err;
1008 aot_name = g_strdup_printf ("%s%s", assembly->image->name, SHARED_EXT);
1009
1010 sofile = mono_dl_open (aot_name, MONO_DL_LAZY, &err);
1011
1012 if (!sofile) {
1013 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT failed to load AOT module %s: %s\n", aot_name, err);
1014 g_free (err);
1015 }
1016 }
1017 }
1018
1019 if (!sofile && !globals) {
1020 if (mono_aot_only) {
1021 fprintf (stderr, "Failed to load AOT module '%s' in aot-only mode.\n", aot_name);
1022 exit (1);
1023 }
1024 g_free (aot_name);
1025 return;
1026 }
1027
1028 find_symbol (sofile, globals, "mono_assembly_guid", (gpointer *) &saved_guid);
1029 find_symbol (sofile, globals, "mono_aot_version", (gpointer *) &aot_version);
1030 find_symbol (sofile, globals, "mono_aot_opt_flags", (gpointer *)&opt_flags);
1031 find_symbol (sofile, globals, "mono_runtime_version", (gpointer *)&runtime_version);
1032 find_symbol (sofile, globals, "mono_aot_got_addr", (gpointer *)&got_addr);
1033
1034 if (!aot_version || strcmp (aot_version, MONO_AOT_FILE_VERSION)) {
1035 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);
1036 usable = FALSE;
1037 }
1038 else {
1039 if (!saved_guid || strcmp (assembly->image->guid, saved_guid)) {
1040 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s is out of date.\n", aot_name);
1041 usable = FALSE;
1042 }
1043 }
1044
1045 build_info = mono_get_runtime_build_info ();
1046 if (!runtime_version || ((strlen (runtime_version) > 0 && strcmp (runtime_version, build_info)))) {
1047 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);
1048 usable = FALSE;
1049 }
1050 g_free (build_info);
1051
1052 find_symbol (sofile, globals, "mono_aot_file_info", (gpointer*)&file_info);
1053 g_assert (file_info);
1054
1055 full_aot = ((MonoAotFileInfo*)file_info)->flags & MONO_AOT_FILE_FLAG_FULL_AOT;
1056
1057 if (mono_aot_only && !full_aot) {
1058 fprintf (stderr, "Can't use AOT image '%s' in aot-only mode because it is not compiled with --aot=full.\n", aot_name);
1059 exit (1);
1060 }
1061 if (!mono_aot_only && full_aot) {
1062 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s is compiled with --aot=full.\n", aot_name);
1063 usable = FALSE;
1064 }
1065
1066 if ((((MonoAotFileInfo*)file_info)->flags & MONO_AOT_FILE_FLAG_WITH_LLVM) && !mono_use_llvm) {
1067 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s is compiled with LLVM.\n", aot_name);
1068 usable = FALSE;
1069 }
1070
1071 if (!usable) {
1072 if (mono_aot_only) {
1073 fprintf (stderr, "Failed to load AOT module '%s' while running in aot-only mode.\n", aot_name);
1074 exit (1);
1075 }
1076 g_free (aot_name);
1077 if (sofile)
1078 mono_dl_close (sofile);
1079 assembly->image->aot_module = NULL;
1080 return;
1081 }
1082
1083 amodule = g_new0 (MonoAotModule, 1);
1084 amodule->aot_name = aot_name;
1085 amodule->assembly = assembly;
1086
1087 memcpy (&amodule->info, file_info, sizeof (*file_info));
1088
1089 amodule->got = *got_addr;
1090 amodule->got [0] = assembly->image;
1091 amodule->globals = globals;
1092 amodule->sofile = sofile;
1093 amodule->method_to_code = g_hash_table_new (mono_aligned_addr_hash, NULL);
1094
1095 /* Read image table */
1096 {
1097 guint32 table_len, i;
1098 char *table = NULL;
1099
1100 find_symbol (sofile, globals, "mono_image_table", (gpointer *)&table);
1101 g_assert (table);
1102
1103 table_len = *(guint32*)table;
1104 table += sizeof (guint32);
1105 amodule->image_table = g_new0 (MonoImage*, table_len);
1106 amodule->image_names = g_new0 (MonoAssemblyName, table_len);
1107 amodule->image_guids = g_new0 (char*, table_len);
1108 amodule->image_table_len = table_len;
1109 for (i = 0; i < table_len; ++i) {
1110 MonoAssemblyName *aname = &(amodule->image_names [i]);
1111
1112 aname->name = g_strdup (table);
1113 table += strlen (table) + 1;
1114 amodule->image_guids [i] = g_strdup (table);
1115 table += strlen (table) + 1;
1116 if (table [0] != 0)
1117 aname->culture = g_strdup (table);
1118 table += strlen (table) + 1;
1119 memcpy (aname->public_key_token, table, strlen (table) + 1);
1120 table += strlen (table) + 1;
1121
1122 table = ALIGN_PTR_TO (table, 8);
1123 aname->flags = *(guint32*)table;
1124 table += 4;
1125 aname->major = *(guint32*)table;
1126 table += 4;
1127 aname->minor = *(guint32*)table;
1128 table += 4;
1129 aname->build = *(guint32*)table;
1130 table += 4;
1131 aname->revision = *(guint32*)table;
1132 table += 4;
1133 }
1134 }
1135
1136 /* Read method and method_info tables */
1137 find_symbol (sofile, globals, "code_offsets", (gpointer*)&amodule->code_offsets);
1138 find_symbol (sofile, globals, "methods", (gpointer*)&amodule->code);
1139 find_symbol (sofile, globals, "methods_end", (gpointer*)&amodule->code_end);
1140 find_symbol (sofile, globals, "method_info_offsets", (gpointer*)&amodule->method_info_offsets);
1141 find_symbol (sofile, globals, "ex_info_offsets", (gpointer*)&amodule->ex_info_offsets);
1142 find_symbol (sofile, globals, "blob", (gpointer*)&amodule->blob);
1143 find_symbol (sofile, globals, "class_info_offsets", (gpointer*)&amodule->class_info_offsets);
1144 find_symbol (sofile, globals, "class_name_table", (gpointer *)&amodule->class_name_table);
1145 find_symbol (sofile, globals, "extra_method_table", (gpointer *)&amodule->extra_method_table);
1146 find_symbol (sofile, globals, "extra_method_info_offsets", (gpointer *)&amodule->extra_method_info_offsets);
1147 find_symbol (sofile, globals, "got_info_offsets", (gpointer*)&amodule->got_info_offsets);
1148 find_symbol (sofile, globals, "specific_trampolines", (gpointer*)&(amodule->trampolines [MONO_AOT_TRAMP_SPECIFIC]));
1149 find_symbol (sofile, globals, "static_rgctx_trampolines", (gpointer*)&(amodule->trampolines [MONO_AOT_TRAMP_STATIC_RGCTX]));
1150 find_symbol (sofile, globals, "imt_thunks", (gpointer*)&(amodule->trampolines [MONO_AOT_TRAMP_IMT_THUNK]));
1151 find_symbol (sofile, globals, "unwind_info", (gpointer)&amodule->unwind_info);
1152 find_symbol (sofile, globals, "mem_end", (gpointer*)&amodule->mem_end);
1153
1154 amodule->mem_begin = amodule->code;
1155
1156 find_symbol (sofile, globals, "plt", (gpointer*)&amodule->plt);
1157 find_symbol (sofile, globals, "plt_end", (gpointer*)&amodule->plt_end);
1158
1159 if (make_unreadable) {
1160 #ifndef TARGET_WIN32
1161 guint8 *addr;
1162 guint8 *page_start;
1163 int pages, err, len;
1164
1165 addr = amodule->mem_begin;
1166 len = amodule->mem_end - amodule->mem_begin;
1167
1168 /* Round down in both directions to avoid modifying data which is not ours */
1169 page_start = (guint8 *) (((gssize) (addr)) & ~ (mono_pagesize () - 1)) + mono_pagesize ();
1170 pages = ((addr + len - page_start + mono_pagesize () - 1) / mono_pagesize ()) - 1;
1171 err = mono_mprotect (page_start, pages * mono_pagesize (), MONO_MMAP_NONE);
1172 g_assert (err == 0);
1173 #endif
1174 }
1175
1176 mono_aot_lock ();
1177
1178 aot_code_low_addr = MIN (aot_code_low_addr, (gsize)amodule->code);
1179 aot_code_high_addr = MAX (aot_code_high_addr, (gsize)amodule->code_end);
1180
1181 g_hash_table_insert (aot_modules, assembly, amodule);
1182 mono_aot_unlock ();
1183
1184 mono_jit_info_add_aot_module (assembly->image, amodule->code, amodule->code_end);
1185
1186 assembly->image->aot_module = amodule;
1187
1188 #ifdef HAVE_DL_ITERATE_PHDR
1189 /* Lookup the address of the .eh_frame_hdr () section if available */
1190 dl_iterate_phdr (dl_callback, amodule);
1191 #endif
1192
1193 if (mono_aot_only) {
1194 if (mono_defaults.corlib) {
1195 /* The second got slot contains the mscorlib got addr */
1196 MonoAotModule *mscorlib_amodule = mono_defaults.corlib->aot_module;
1197
1198 amodule->got [1] = mscorlib_amodule->got;
1199 } else {
1200 amodule->got [1] = amodule->got;
1201 }
1202 }
1203
1204 /*
1205 * Since we store methoddef and classdef tokens when referring to methods/classes in
1206 * referenced assemblies, we depend on the exact versions of the referenced assemblies.
1207 * MS calls this 'hard binding'. This means we have to load all referenced assemblies
1208 * non-lazily, since we can't handle out-of-date errors later.
1209 * The cached class info also depends on the exact assemblies.
1210 */
1211 for (i = 0; i < amodule->image_table_len; ++i)
1212 load_image (amodule, i, FALSE);
1213
1214 if (amodule->out_of_date) {
1215 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);
1216 if (mono_aot_only) {
1217 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);
1218 exit (1);
1219 }
1220 }
1221 else
1222 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT loaded AOT Module for %s.\n", assembly->image->name);
1223 }
1224
1225 /*
1226 * mono_aot_register_globals:
1227 *
1228 * This is called by the ctor function in AOT images compiled with the
1229 * 'no-dlsym' option.
1230 */
1231 void
1232 mono_aot_register_globals (gpointer *globals)
1233 {
1234 g_assert_not_reached ();
1235 }
1236
1237 /*
1238 * mono_aot_register_module:
1239 *
1240 * This should be called by embedding code to register AOT modules statically linked
1241 * into the executable. AOT_INFO should be the value of the
1242 * 'mono_aot_module_<ASSEMBLY_NAME>_info' global symbol from the AOT module.
1243 */
1244 void
1245 mono_aot_register_module (gpointer *aot_info)
1246 {
1247 gpointer *globals;
1248 char *aname;
1249
1250 globals = aot_info;
1251 g_assert (globals);
1252
1253 /* Determine the assembly name */
1254 find_symbol (NULL, globals, "mono_aot_assembly_name", (gpointer*)&aname);
1255 g_assert (aname);
1256
1257 /* This could be called before startup */
1258 if (aot_modules)
1259 mono_aot_lock ();
1260
1261 if (!static_aot_modules)
1262 static_aot_modules = g_hash_table_new (g_str_hash, g_str_equal);
1263
1264 g_hash_table_insert (static_aot_modules, aname, globals);
1265
1266 if (aot_modules)
1267 mono_aot_unlock ();
1268 }
1269
1270 void
1271 mono_aot_init (void)
1272 {
1273 InitializeCriticalSection (&aot_mutex);
1274 aot_modules = g_hash_table_new (NULL, NULL);
1275
1276 mono_install_assembly_load_hook (load_aot_module, NULL);
1277
1278 if (g_getenv ("MONO_LASTAOT"))
1279 mono_last_aot_method = atoi (g_getenv ("MONO_LASTAOT"));
1280 if (g_getenv ("MONO_AOT_CACHE"))
1281 use_aot_cache = TRUE;
1282 }
1283
1284 static gboolean
1285 decode_cached_class_info (MonoAotModule *module, MonoCachedClassInfo *info, guint8 *buf, guint8 **endbuf)
1286 {
1287 guint32 flags;
1288
1289 info->vtable_size = decode_value (buf, &buf);
1290 if (info->vtable_size == -1)
1291 /* Generic type */
1292 return FALSE;
1293 flags = decode_value (buf, &buf);
1294 info->ghcimpl = (flags >> 0) & 0x1;
1295 info->has_finalize = (flags >> 1) & 0x1;
1296 info->has_cctor = (flags >> 2) & 0x1;
1297 info->has_nested_classes = (flags >> 3) & 0x1;
1298 info->blittable = (flags >> 4) & 0x1;
1299 info->has_references = (flags >> 5) & 0x1;
1300 info->has_static_refs = (flags >> 6) & 0x1;
1301 info->no_special_static_fields = (flags >> 7) & 0x1;
1302 info->is_generic_container = (flags >> 8) & 0x1;
1303
1304 if (info->has_cctor) {
1305 MonoImage *cctor_image = decode_method_ref (module, &info->cctor_token, NULL, NULL, buf, &buf);
1306 if (!cctor_image)
1307 return FALSE;
1308 }
1309 if (info->has_finalize) {
1310 info->finalize_image = decode_method_ref (module, &info->finalize_token, NULL, NULL, buf, &buf);
1311 if (!info->finalize_image)
1312 return FALSE;
1313 }
1314
1315 info->instance_size = decode_value (buf, &buf);
1316 info->class_size = decode_value (buf, &buf);
1317 info->packing_size = decode_value (buf, &buf);
1318 info->min_align = decode_value (buf, &buf);
1319
1320 *endbuf = buf;
1321
1322 return TRUE;
1323 }
1324
1325 gpointer
1326 mono_aot_get_method_from_vt_slot (MonoDomain *domain, MonoVTable *vtable, int slot)
1327 {
1328 int i;
1329 MonoClass *klass = vtable->klass;
1330 MonoAotModule *aot_module = klass->image->aot_module;
1331 guint8 *info, *p;
1332 MonoCachedClassInfo class_info;
1333 gboolean err;
1334 guint32 token;
1335 MonoImage *image;
1336 gboolean no_aot_trampoline;
1337
1338 if (MONO_CLASS_IS_INTERFACE (klass) || klass->rank || !aot_module)
1339 return NULL;
1340
1341 info = &aot_module->blob [mono_aot_get_offset (aot_module->class_info_offsets, mono_metadata_token_index (klass->type_token) - 1)];
1342 p = info;
1343
1344 err = decode_cached_class_info (aot_module, &class_info, p, &p);
1345 if (!err)
1346 return NULL;
1347
1348 for (i = 0; i < slot; ++i)
1349 decode_method_ref (aot_module, &token, NULL, NULL, p, &p);
1350
1351 image = decode_method_ref (aot_module, &token, NULL, &no_aot_trampoline, p, &p);
1352 if (!image)
1353 return NULL;
1354 if (no_aot_trampoline)
1355 return NULL;
1356
1357 if (mono_metadata_token_index (token) == 0)
1358 return NULL;
1359
1360 return mono_aot_get_method_from_token (domain, image, token);
1361 }
1362
1363 gboolean
1364 mono_aot_get_cached_class_info (MonoClass *klass, MonoCachedClassInfo *res)
1365 {
1366 MonoAotModule *aot_module = klass->image->aot_module;
1367 guint8 *p;
1368 gboolean err;
1369
1370 if (klass->rank || !aot_module)
1371 return FALSE;
1372
1373 p = (guint8*)&aot_module->blob [mono_aot_get_offset (aot_module->class_info_offsets, mono_metadata_token_index (klass->type_token) - 1)];
1374
1375 err = decode_cached_class_info (aot_module, res, p, &p);
1376 if (!err)
1377 return FALSE;
1378
1379 return TRUE;
1380 }
1381
1382 /**
1383 * mono_aot_get_class_from_name:
1384 *
1385 * Obtains a MonoClass with a given namespace and a given name which is located in IMAGE,
1386 * using a cache stored in the AOT file.
1387 * Stores the resulting class in *KLASS if found, stores NULL otherwise.
1388 *
1389 * Returns: TRUE if the klass was found/not found in the cache, FALSE if no aot file was
1390 * found.
1391 */
1392 gboolean
1393 mono_aot_get_class_from_name (MonoImage *image, const char *name_space, const char *name, MonoClass **klass)
1394 {
1395 MonoAotModule *aot_module = image->aot_module;
1396 guint16 *table, *entry;
1397 guint16 table_size;
1398 guint32 hash;
1399 char full_name_buf [1024];
1400 char *full_name;
1401 const char *name2, *name_space2;
1402 MonoTableInfo *t;
1403 guint32 cols [MONO_TYPEDEF_SIZE];
1404 GHashTable *nspace_table;
1405
1406 if (!aot_module || !aot_module->class_name_table)
1407 return FALSE;
1408
1409 mono_aot_lock ();
1410
1411 *klass = NULL;
1412
1413 /* First look in the cache */
1414 if (!aot_module->name_cache)
1415 aot_module->name_cache = g_hash_table_new (g_str_hash, g_str_equal);
1416 nspace_table = g_hash_table_lookup (aot_module->name_cache, name_space);
1417 if (nspace_table) {
1418 *klass = g_hash_table_lookup (nspace_table, name);
1419 if (*klass) {
1420 mono_aot_unlock ();
1421 return TRUE;
1422 }
1423 }
1424
1425 table_size = aot_module->class_name_table [0];
1426 table = aot_module->class_name_table + 1;
1427
1428 if (name_space [0] == '\0')
1429 full_name = g_strdup_printf ("%s", name);
1430 else {
1431 if (strlen (name_space) + strlen (name) < 1000) {
1432 sprintf (full_name_buf, "%s.%s", name_space, name);
1433 full_name = full_name_buf;
1434 } else {
1435 full_name = g_strdup_printf ("%s.%s", name_space, name);
1436 }
1437 }
1438 hash = mono_metadata_str_hash (full_name) % table_size;
1439 if (full_name != full_name_buf)
1440 g_free (full_name);
1441
1442 entry = &table [hash * 2];
1443
1444 if (entry [0] != 0) {
1445 t = &image->tables [MONO_TABLE_TYPEDEF];
1446
1447 while (TRUE) {
1448 guint32 index = entry [0];
1449 guint32 next = entry [1];
1450 guint32 token = mono_metadata_make_token (MONO_TABLE_TYPEDEF, index);
1451
1452 name_table_accesses ++;
1453
1454 mono_metadata_decode_row (t, index - 1, cols, MONO_TYPEDEF_SIZE);
1455
1456 name2 = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
1457 name_space2 = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
1458
1459 if (!strcmp (name, name2) && !strcmp (name_space, name_space2)) {
1460 mono_aot_unlock ();
1461 *klass = mono_class_get (image, token);
1462
1463 /* Add to cache */
1464 if (*klass) {
1465 mono_aot_lock ();
1466 nspace_table = g_hash_table_lookup (aot_module->name_cache, name_space);
1467 if (!nspace_table) {
1468 nspace_table = g_hash_table_new (g_str_hash, g_str_equal);
1469 g_hash_table_insert (aot_module->name_cache, (char*)name_space2, nspace_table);
1470 }
1471 g_hash_table_insert (nspace_table, (char*)name2, *klass);
1472 mono_aot_unlock ();
1473 }
1474 return TRUE;
1475 }
1476
1477 if (next != 0) {
1478 entry = &table [next * 2];
1479 } else {
1480 break;
1481 }
1482 }
1483 }
1484
1485 mono_aot_unlock ();
1486
1487 return TRUE;
1488 }
1489
1490 #define DW_EH_PE_omit 0xff
1491 #define DW_EH_PE_uleb128 0x01
1492 #define DW_EH_PE_udata2 0x02
1493 #define DW_EH_PE_udata4 0x03
1494 #define DW_EH_PE_udata8 0x04
1495 #define DW_EH_PE_sleb128 0x09
1496 #define DW_EH_PE_sdata2 0x0A
1497 #define DW_EH_PE_sdata4 0x0B
1498 #define DW_EH_PE_sdata8 0x0C
1499
1500 #define DW_EH_PE_absptr 0x00
1501 #define DW_EH_PE_pcrel 0x10
1502 #define DW_EH_PE_datarel 0x30
1503 #define DW_EH_PE_omit 0xff
1504
1505 typedef struct
1506 {
1507 guint8 version;
1508 guint8 eh_frame_ptr_enc;
1509 guint8 fde_count_enc;
1510 guint8 table_enc;
1511 guint8 rest;
1512 } eh_frame_hdr;
1513
1514 /*
1515 * decode_eh_frame:
1516 *
1517 * Decode the exception handling information in the .eh_frame section of the AOT
1518 * file belong to CODE, and construct a MonoJitInfo structure from it.
1519 * LOCKING: Acquires the domain lock.
1520 */
1521 static G_GNUC_UNUSED void
1522 decode_eh_frame (MonoAotModule *amodule, MonoDomain *domain,
1523 MonoMethod *method, guint8 *code, MonoJitInfo *jinfo)
1524 {
1525 eh_frame_hdr *hdr;
1526 guint8 *p;
1527 guint8 *eh_frame, *unwind_info;
1528 guint32 eh_frame_ptr;
1529 int fde_count;
1530 gint32 *table;
1531 int i, pos, left, right, offset, offset1, offset2;
1532 guint32 unw_len, code_len;
1533 MonoJitExceptionInfo *ei;
1534 guint32 ei_len;
1535
1536 g_assert (amodule->eh_frame_hdr);
1537
1538 // http://refspecs.freestandards.org/LSB_1.3.0/gLSB/gLSB/ehframehdr.html
1539 hdr = (eh_frame_hdr*)amodule->eh_frame_hdr;
1540 g_assert (hdr->version == 1);
1541 g_assert (hdr->eh_frame_ptr_enc == (DW_EH_PE_pcrel | DW_EH_PE_sdata4));
1542 g_assert (hdr->fde_count_enc == DW_EH_PE_udata4);
1543 g_assert (hdr->table_enc == (DW_EH_PE_datarel | DW_EH_PE_sdata4));
1544
1545 p = &(hdr->rest);
1546 eh_frame_ptr = *(guint32*)p;
1547 p += 4;
1548 fde_count = *(guint32*)p;
1549 p += 4;
1550 table = (gint32*)p;
1551
1552 /* Binary search in the table to find the entry for code */
1553 offset = code - amodule->eh_frame_hdr;
1554
1555 left = 0;
1556 right = fde_count;
1557 while (TRUE) {
1558 pos = (left + right) / 2;
1559
1560 offset1 = table [(pos * 2)];
1561 if (pos + 1 == fde_count)
1562 /* FIXME: */
1563 offset2 = amodule->code_end - amodule->code;
1564 else
1565 offset2 = table [(pos + 1) * 2];
1566
1567 if (offset < offset1)
1568 right = pos;
1569 else if (offset >= offset2)
1570 left = pos + 1;
1571 else
1572 break;
1573 }
1574
1575 g_assert (code >= amodule->eh_frame_hdr + table [(pos * 2)]);
1576 if (pos < fde_count)
1577 g_assert (code < amodule->eh_frame_hdr + table [(pos * 2) + 2]);
1578
1579 eh_frame = amodule->eh_frame_hdr + table [(pos * 2) + 1];
1580
1581 unwind_info = mono_unwind_decode_fde (eh_frame, &unw_len, &code_len, &ei, &ei_len, NULL);
1582
1583 jinfo->code_size = code_len;
1584 jinfo->used_regs = mono_cache_unwind_info (unwind_info, unw_len);
1585 jinfo->method = method;
1586 jinfo->code_start = code;
1587 jinfo->domain_neutral = 0;
1588 /* This signals that used_regs points to a normal cached unwind info */
1589 jinfo->from_aot = 0;
1590
1591 g_assert (ei_len == jinfo->num_clauses);
1592 for (i = 0; i < jinfo->num_clauses; ++i) {
1593 MonoJitExceptionInfo *jei = &jinfo->clauses [i];
1594
1595 jei->try_start = ei [i].try_start;
1596 jei->try_end = ei [i].try_end;
1597 jei->handler_start = ei [i].handler_start;
1598 }
1599 }
1600
1601 #ifdef TARGET_ARM
1602
1603 /* The offsets in the table are 31 bits long, have to extend them to 32 */
1604 #define EXTEND_PREL31(val) ((((gint32)(val)) << 1) >> 1)
1605
1606 static inline guint32
1607 decode_uleb128 (guint8 *buf, guint8 **endbuf)
1608 {
1609 guint8 *p = buf;
1610 guint32 res = 0;
1611 int shift = 0;
1612
1613 while (TRUE) {
1614 guint8 b = *p;
1615 p ++;
1616
1617 res = res | (((int)(b & 0x7f)) << shift);
1618 if (!(b & 0x80))
1619 break;
1620 shift += 7;
1621 }
1622
1623 *endbuf = p;
1624
1625 return res;
1626 }
1627
1628 static GSList*
1629 decode_arm_eh_ops (guint8 *unwind_ops, int nops)
1630 {
1631 int i, vsp_reg, vsp_offset;
1632 GSList *ops;
1633 gint32 *reg_offsets;
1634
1635 /*
1636 * Have to convert the ARM unwind info into DWARF unwind info.
1637 * The ARM unwind info specifies a simple set of instructions which need to be
1638 * executed during unwinding. It manipulates a virtual stack pointer (vsp). The
1639 * connection with DWARF unwind info is the following: after all ARM unwind
1640 * opcodes have been executed, the stack should be completely unwound, i.e.
1641 * vsp == DWARF CFA. This allows us to construct the DWARF opcodes corresponding
1642 * to the ARM opcodes.
1643 * The ARM unwind info is not instruction precise, i. e. it can't handle
1644 * async exceptions etc.
1645 */
1646 /* The reg used to compute the initial value of vsp */
1647 vsp_reg = ARMREG_SP;
1648 /* The offset between vsp_reg and the CFA */
1649 vsp_offset = 0;
1650
1651 /* The register save offsets from the initial value of vsp */
1652 reg_offsets = g_new0 (gint32, 16);
1653 for (i = 0; i < 16; ++i)
1654 reg_offsets [i] = -1;
1655
1656 /* section 9.3 in the ehabi doc */
1657 for (i = 0; i < nops; ++i) {
1658 guint8 op = unwind_ops [i];
1659
1660 if ((op >> 6) == 0) {
1661 /* vsp = vsp + (xxxxxx << 2) + 4. */
1662 vsp_offset += ((op & 0x3f) << 2) + 4;
1663 } else if ((op >> 6) == 1) {
1664 /* vsp = vsp - (xxxxxx << 2) - 4. */
1665 vsp_offset -= ((op & 0x3f) << 2) + 4;
1666 } else if (op == 0xb2) {
1667 /* vsp = vsp = vsp + 0x204 + (uleb128 << 2) */
1668 guint8 *p = unwind_ops + i + 1;
1669 guint32 v = decode_uleb128 (p, &p);
1670
1671 vsp_offset += 0x204 + (v << 2);
1672 i = (p - unwind_ops) - 1;
1673 } else if (op >= 0x80 && op <= 0x8f) {
1674 /* pop registers */
1675 guint8 op2;
1676 GSList *regs;
1677 int j;
1678
1679 g_assert (i + 1 < nops);
1680 op2 = unwind_ops [i + 1];
1681
1682 regs = NULL;
1683 for (j = 0; j < 8; ++j)
1684 if (op2 & (0x1 << j))
1685 regs = g_slist_append (regs, GUINT_TO_POINTER (ARMREG_R4 + j));
1686 for (j = 0; j < 4; ++j)
1687 if (op & (0x1 << j))
1688 regs = g_slist_append (regs, GUINT_TO_POINTER (ARMREG_R12 + j));
1689 g_assert (regs);
1690
1691 for (j = 0; j < g_slist_length (regs); ++j)
1692 reg_offsets [GPOINTER_TO_UINT (g_slist_nth (regs, j)->data)] = vsp_offset + (j * 4);
1693
1694 vsp_offset += g_slist_length (regs) * 4;
1695
1696 g_slist_free (regs);
1697
1698 i ++;
1699 } else if (op >= 0xa8 && op <= 0xaf) {
1700 GSList *regs;
1701 int j;
1702
1703 /* pop r4-r[4 + nnn], r14 */
1704
1705 regs = NULL;
1706 for (j = 0; j <= (op & 0x7); ++j)
1707 regs = g_slist_append (regs, GUINT_TO_POINTER (ARMREG_R4 + j));
1708 regs = g_slist_append (regs, GUINT_TO_POINTER (ARMREG_R14));
1709
1710 for (j = 0; j < g_slist_length (regs); ++j)
1711 reg_offsets [GPOINTER_TO_UINT (g_slist_nth (regs, j)->data)] = vsp_offset + (j * 4);
1712
1713 vsp_offset += g_slist_length (regs) * 4;
1714
1715 g_slist_free (regs);
1716 } else if (op == 0xb0) {
1717 /* finish */
1718 break;
1719 } else if (op >= 0x90 && op <= 0x9f && op != 0x9d && op != 0x9f) {
1720 /* vsp = <reg> */
1721 vsp_reg = op & 0xf;
1722 vsp_offset = 0;
1723 } else {
1724 int j;
1725
1726 for (j = 0; j < nops; ++j)
1727 printf ("%x ", unwind_ops [j]);
1728 printf (" / %d\n", i);
1729 g_assert_not_reached ();
1730 }
1731 }
1732
1733 ops = NULL;
1734
1735 /* vsp_reg + vsp_offset = CFA */
1736 mono_add_unwind_op_def_cfa (ops, (guint8*)NULL, (guint8*)NULL, vsp_reg, vsp_offset);
1737
1738 for (i = 0; i < 16; ++i) {
1739 if (reg_offsets [i] != -1)
1740 /* The reg is saved at vsp_reg + reg_offset [i] == CFA - (vsp_offset - reg_offset [i]) */
1741 mono_add_unwind_op_offset (ops, (guint8*)NULL, (guint8*)NULL, i, - (vsp_offset - reg_offsets [i]));
1742 }
1743
1744 return ops;
1745 }
1746
1747 /*
1748 * decode_arm_exidx:
1749 *
1750 * Decode the exception handling information in the .ARM.exidx section of the AOT
1751 * file belong to CODE, and construct a MonoJitInfo structure from it.
1752 * LOCKING: Acquires the domain lock.
1753 */
1754 static void
1755 decode_arm_exidx (MonoAotModule *amodule, MonoDomain *domain,
1756 MonoMethod *method, guint8 *code, guint32 code_len, MonoJitInfo *jinfo)
1757 {
1758 guint32 *table;
1759 guint8 *base, *code1, *code2;
1760 int i, pos, left, right, offset, offset1, offset2, count, nwords, nops;
1761 guint32 entry;
1762 guint8 unwind_ops [64];
1763 GSList *ops;
1764 guint8 *unwind_info;
1765 guint32 unw_len;
1766
1767 g_assert (amodule->arm_exidx);
1768
1769 table = (guint32*)amodule->arm_exidx;
1770
1771 /*
1772 * The table format is described in:
1773 * infocenter.arm.com/help/topic/com.arm.doc.../IHI0038A_ehabi.pdf
1774 */
1775
1776 base = amodule->arm_exidx;
1777 count = amodule->arm_exidx_size / 8;
1778
1779 /* Binary search in the table to find the entry for code */
1780 offset = code - base;
1781
1782 left = 0;
1783 right = count;
1784 while (TRUE) {
1785 pos = (left + right) / 2;
1786
1787 if (left == right)
1788 break;
1789
1790 offset1 = EXTEND_PREL31 (table [(pos * 2)]);
1791 code1 = (guint8*)&(table [pos * 2]) + offset1;
1792 if (pos + 1 == count)
1793 /* FIXME: */
1794 offset2 = amodule->code_end - amodule->code;
1795 else
1796 offset2 = EXTEND_PREL31 (table [(pos + 1) * 2]);
1797 code2 = (guint8*)&(table [(pos + 1) * 2]) + offset2;
1798
1799 if (code < code1)
1800 right = pos;
1801 else if (code >= code2)
1802 left = pos + 1;
1803 else
1804 break;
1805 }
1806
1807 if (code >= code1) {
1808 /*
1809 * The linker might merge duplicate unwind table entries, so
1810 * offset1 and offset2 might point to another method, but this is not a problem.
1811 */
1812 code1 = (guint8*)&(table [pos * 2]) + offset1;
1813 code2 = (guint8*)&(table [(pos + 1) * 2]) + offset2;
1814
1815 g_assert (code >= code1);
1816 if (pos < count)
1817 g_assert (code < code2);
1818
1819 entry = table [(pos * 2) + 1];
1820
1821 /* inline entry, compact model, personality routine 0 */
1822 if ((entry & 0xff000000) == 0x80000000) {
1823 nops = 3;
1824 unwind_ops [0] = (entry & 0x00ff0000) >> 16;
1825 unwind_ops [1] = (entry & 0x0000ff00) >> 8;
1826 unwind_ops [2] = (entry & 0x000000ff) >> 0;
1827
1828 ops = decode_arm_eh_ops (unwind_ops, nops);
1829 } else if ((entry & 0x80000000) == 0) {
1830 /* non-inline entry */
1831 guint8 *data = (guint8*)&table [(pos * 2) + 1] + EXTEND_PREL31 (entry);
1832
1833 entry = ((guint32*)data) [0];
1834
1835 /* compact model, personality routine 1 */
1836 g_assert ((entry & 0xff000000) == 0x81000000);
1837
1838 nwords = (entry & 0x00ff0000) >> 16;
1839 nops = nwords * 4 + 2;
1840 g_assert (nops < 64);
1841
1842 unwind_ops [0] = (entry & 0x0000ff00) >> 8;
1843 unwind_ops [1] = (entry & 0x000000ff) >> 0;
1844
1845 for (i = 0; i < nwords; ++i) {
1846 entry = ((guint32*)data) [1 + i];
1847 unwind_ops [(i * 4) + 2] = (entry & 0xff000000) >> 24;
1848 unwind_ops [(i * 4) + 2 + 1] = (entry & 0x00ff0000) >> 16;
1849 unwind_ops [(i * 4) + 2 + 2] = (entry & 0x0000ff00) >> 8;
1850 unwind_ops [(i * 4) + 2 + 3] = (entry & 0x000000ff) >> 0;
1851 }
1852
1853 ops = decode_arm_eh_ops (unwind_ops, nops);
1854 } else {
1855 NOT_IMPLEMENTED;
1856 }
1857
1858 unwind_info = mono_unwind_ops_encode (ops, &unw_len);
1859 } else {
1860 /* The method has no unwind info */
1861 unwind_info = NULL;
1862 unw_len = 0;
1863 }
1864
1865 jinfo->code_size = code_len;
1866 jinfo->used_regs = mono_cache_unwind_info (unwind_info, unw_len);
1867 jinfo->method = method;
1868 jinfo->code_start = code;
1869 jinfo->domain_neutral = 0;
1870 /* This signals that used_regs points to a normal cached unwind info */
1871 jinfo->from_aot = 0;
1872 }
1873 #endif
1874
1875 /*
1876 * LOCKING: Acquires the domain lock.
1877 */
1878 static MonoJitInfo*
1879 decode_exception_debug_info (MonoAotModule *amodule, MonoDomain *domain,
1880 MonoMethod *method, guint8* ex_info, guint8 *addr,
1881 guint8 *code, guint32 code_len)
1882 {
1883 int i, buf_len;
1884 MonoJitInfo *jinfo;
1885 guint used_int_regs, flags;
1886 gboolean has_generic_jit_info, has_dwarf_unwind_info, has_clauses, has_seq_points;
1887 gboolean from_llvm;
1888 guint8 *p;
1889 int generic_info_size;
1890
1891 /* Load the method info from the AOT file */
1892
1893 p = ex_info;
1894 flags = decode_value (p, &p);
1895 has_generic_jit_info = (flags & 1) != 0;
1896 has_dwarf_unwind_info = (flags & 2) != 0;
1897 has_clauses = (flags & 4) != 0;
1898 has_seq_points = (flags & 8) != 0;
1899 from_llvm = (flags & 16) != 0;
1900 if (has_dwarf_unwind_info) {
1901 guint32 offset;
1902
1903 offset = decode_value (p, &p);
1904 g_assert (offset < (1 << 30));
1905 used_int_regs = offset;
1906 } else {
1907 used_int_regs = decode_value (p, &p);
1908 }
1909 if (has_generic_jit_info)
1910 generic_info_size = sizeof (MonoGenericJitInfo);
1911 else
1912 generic_info_size = 0;
1913
1914 /* Exception table */
1915 if (has_clauses) {
1916 int num_clauses = decode_value (p, &p);
1917
1918 jinfo =
1919 mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO + (sizeof (MonoJitExceptionInfo) * num_clauses) + generic_info_size);
1920 jinfo->num_clauses = num_clauses;
1921
1922 for (i = 0; i < num_clauses; ++i) {
1923 MonoJitExceptionInfo *ei = &jinfo->clauses [i];
1924
1925 ei->flags = decode_value (p, &p);
1926 ei->exvar_offset = decode_value (p, &p);
1927
1928 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER)
1929 ei->data.filter = code + decode_value (p, &p);
1930 else {
1931 if (decode_value (p, &p))
1932 ei->data.catch_class = decode_klass_ref (amodule, p, &p);
1933 }
1934
1935 ei->try_start = code + decode_value (p, &p);
1936 ei->try_end = code + decode_value (p, &p);
1937 ei->handler_start = code + decode_value (p, &p);
1938 }
1939 }
1940 else {
1941 jinfo = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO + generic_info_size);
1942 }
1943
1944 if (from_llvm) {
1945 /* LLVM compiled method */
1946 /* The info is in the .eh_frame section */
1947 #ifdef TARGET_ARM
1948 decode_arm_exidx (amodule, domain, method, code, code_len, jinfo);
1949 #else
1950 decode_eh_frame (amodule, domain, method, code, jinfo);
1951 #endif
1952 jinfo->from_llvm = 1;
1953 } else {
1954 jinfo->code_size = code_len;
1955 jinfo->used_regs = used_int_regs;
1956 jinfo->method = method;
1957 jinfo->code_start = code;
1958 jinfo->domain_neutral = 0;
1959 jinfo->from_aot = 1;
1960 }
1961
1962 if (has_generic_jit_info) {
1963 MonoGenericJitInfo *gi;
1964
1965 jinfo->has_generic_jit_info = 1;
1966
1967 gi = mono_jit_info_get_generic_jit_info (jinfo);
1968 g_assert (gi);
1969
1970 gi->has_this = decode_value (p, &p);
1971 gi->this_reg = decode_value (p, &p);
1972 gi->this_offset = decode_value (p, &p);
1973
1974 /* This currently contains no data */
1975 gi->generic_sharing_context = g_new0 (MonoGenericSharingContext, 1);
1976
1977 jinfo->method = decode_method_ref_2 (amodule, p, &p);
1978 }
1979
1980 if (has_seq_points) {
1981 MonoSeqPointInfo *seq_points;
1982 int il_offset, native_offset, last_il_offset, last_native_offset, j;
1983
1984 int len = decode_value (p, &p);
1985
1986 seq_points = g_malloc0 (sizeof (MonoSeqPointInfo) + (len - MONO_ZERO_LEN_ARRAY) * sizeof (SeqPoint));
1987 last_il_offset = last_native_offset = 0;
1988 for (i = 0; i < len; ++i) {
1989 SeqPoint *sp = &seq_points->seq_points [i];
1990 il_offset = last_il_offset + decode_value (p, &p);
1991 native_offset = last_native_offset + decode_value (p, &p);
1992
1993 sp->il_offset = il_offset;
1994 sp->native_offset = native_offset;
1995
1996 sp->next_len = decode_value (p, &p);
1997 sp->next = g_new (int, sp->next_len);
1998 for (j = 0; j < sp->next_len; ++j)
1999 sp->next [j] = decode_value (p, &p);
2000
2001 last_il_offset = il_offset;
2002 last_native_offset = native_offset;
2003 }
2004
2005 mono_domain_lock (domain);
2006 g_hash_table_insert (domain_jit_info (domain)->seq_points, method, seq_points);
2007 mono_domain_unlock (domain);
2008 }
2009
2010 /* Load debug info */
2011 buf_len = decode_value (p, &p);
2012 mono_debug_add_aot_method (domain, method, code, p, buf_len);
2013
2014 if (amodule != jinfo->method->klass->image->aot_module) {
2015 mono_aot_lock ();
2016 if (!ji_to_amodule)
2017 ji_to_amodule = g_hash_table_new (NULL, NULL);
2018 g_hash_table_insert (ji_to_amodule, jinfo, amodule);
2019 mono_aot_unlock ();
2020 }
2021
2022 return jinfo;
2023 }
2024
2025 /*
2026 * mono_aot_get_unwind_info:
2027 *
2028 * Return a pointer to the DWARF unwind info belonging to JI.
2029 */
2030 guint8*
2031 mono_aot_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
2032 {
2033 MonoAotModule *amodule = ji->method->klass->image->aot_module;
2034 guint8 *p;
2035 guint8 *code = ji->code_start;
2036
2037 g_assert (amodule);
2038 g_assert (ji->from_aot);
2039
2040 if (!(code >= amodule->code && code <= amodule->code_end)) {
2041 /* ji belongs to a different aot module than amodule */
2042 mono_aot_lock ();
2043 g_assert (ji_to_amodule);
2044 amodule = g_hash_table_lookup (ji_to_amodule, ji);
2045 g_assert (amodule);
2046 g_assert (code >= amodule->code && code <= amodule->code_end);
2047 }
2048
2049 p = amodule->unwind_info + ji->used_regs;
2050 *unwind_info_len = decode_value (p, &p);
2051 return p;
2052 }
2053
2054 static int
2055 compare_ints (const void *a, const void *b)
2056 {
2057 return *(gint32*)a - *(gint32*)b;
2058 }
2059
2060 MonoJitInfo *
2061 mono_aot_find_jit_info (MonoDomain *domain, MonoImage *image, gpointer addr)
2062 {
2063 int pos, left, right, offset, offset1, offset2, code_len;
2064 int method_index, table_len, is_wrapper;
2065 guint32 token;
2066 MonoAotModule *amodule = image->aot_module;
2067 MonoMethod *method;
2068 MonoJitInfo *jinfo;
2069 guint8 *code, *ex_info, *p;
2070 guint32 *table;
2071 int nmethods = amodule->info.nmethods;
2072 gint32 *code_offsets;
2073 int i;
2074
2075 if (!amodule)
2076 return NULL;
2077
2078 if (domain != mono_get_root_domain ())
2079 /* FIXME: */
2080 return NULL;
2081
2082 offset = (guint8*)addr - amodule->code;
2083
2084 /* Compute a sorted table mapping code offsets to method indexes. */
2085 if (!amodule->sorted_code_offsets) {
2086 code_offsets = g_new0 (gint32, nmethods * 2);
2087 for (i = 0; i < nmethods; ++i) {
2088 code_offsets [(i * 2)] = amodule->code_offsets [i];
2089 code_offsets [(i *2) + 1] = i;
2090 }
2091 /* FIXME: Use a merge sort as this is mostly sorted */
2092 qsort (code_offsets, nmethods, sizeof (gint32) * 2, compare_ints);
2093 for (i = 0; i < nmethods -1; ++i)
2094 g_assert (code_offsets [(i * 2)] <= code_offsets [(i + 1) * 2]);
2095
2096 if (InterlockedCompareExchangePointer ((gpointer*)&amodule->sorted_code_offsets, code_offsets, NULL) != NULL)
2097 /* Somebody got in before us */
2098 g_free (code_offsets);
2099 }
2100
2101 code_offsets = amodule->sorted_code_offsets;
2102
2103 /* Binary search in the sorted_code_offsets table */
2104 left = 0;
2105 right = nmethods;
2106 while (TRUE) {
2107 pos = (left + right) / 2;
2108
2109 offset1 = code_offsets [(pos * 2)];
2110 if (pos + 1 == nmethods)
2111 offset2 = amodule->code_end - amodule->code;
2112 else
2113 offset2 = code_offsets [(pos + 1) * 2];
2114
2115 if (offset < offset1)
2116 right = pos;
2117 else if (offset >= offset2)
2118 left = pos + 1;
2119 else
2120 break;
2121 }
2122
2123 g_assert (offset >= code_offsets [(pos * 2)]);
2124 if (pos + 1 < nmethods)
2125 g_assert (offset < code_offsets [((pos + 1) * 2)]);
2126 method_index = code_offsets [(pos * 2) + 1];
2127
2128 code = &amodule->code [amodule->code_offsets [method_index]];
2129 ex_info = &amodule->blob [mono_aot_get_offset (amodule->ex_info_offsets, method_index)];
2130
2131 if (pos == nmethods - 1)
2132 code_len = amodule->code_end - code;
2133 else
2134 code_len = code_offsets [(pos + 1) * 2] - code_offsets [pos * 2];
2135
2136 g_assert ((guint8*)code <= (guint8*)addr && (guint8*)addr < (guint8*)code + code_len);
2137
2138 /* Might be a wrapper/extra method */
2139 if (amodule->extra_methods) {
2140 mono_aot_lock ();
2141 method = g_hash_table_lookup (amodule->extra_methods, GUINT_TO_POINTER (method_index));
2142 mono_aot_unlock ();
2143 } else {
2144 method = NULL;
2145 }
2146
2147 if (!method) {
2148 if (method_index >= image->tables [MONO_TABLE_METHOD].rows) {
2149 /*
2150 * This is hit for extra methods which are called directly, so they are
2151 * not in amodule->extra_methods.
2152 */
2153 table_len = amodule->extra_method_info_offsets [0];
2154 table = amodule->extra_method_info_offsets + 1;
2155 left = 0;
2156 right = table_len;
2157 pos = 0;
2158
2159 /* Binary search */
2160 while (TRUE) {
2161 pos = ((left + right) / 2);
2162
2163 g_assert (pos < table_len);
2164
2165 if (table [pos * 2] < method_index)
2166 left = pos + 1;
2167 else if (table [pos * 2] > method_index)
2168 right = pos;
2169 else
2170 break;
2171 }
2172
2173 p = amodule->blob + table [(pos * 2) + 1];
2174 is_wrapper = decode_value (p, &p);
2175 g_assert (!is_wrapper);
2176 method = decode_method_ref_2 (amodule, p, &p);
2177 g_assert (method);
2178 } else {
2179 token = mono_metadata_make_token (MONO_TABLE_METHOD, method_index + 1);
2180 method = mono_get_method (image, token, NULL);
2181 }
2182 }
2183
2184 /* FIXME: */
2185 g_assert (method);
2186
2187 //printf ("F: %s\n", mono_method_full_name (method, TRUE));
2188
2189 jinfo = decode_exception_debug_info (amodule, domain, method, ex_info, addr, code, code_len);
2190
2191 g_assert ((guint8*)addr >= (guint8*)jinfo->code_start);
2192 g_assert ((guint8*)addr < (guint8*)jinfo->code_start + jinfo->code_size);
2193
2194 /* Add it to the normal JitInfo tables */
2195 mono_jit_info_table_add (domain, jinfo);
2196
2197 return jinfo;
2198 }
2199
2200 static gboolean
2201 decode_patch (MonoAotModule *aot_module, MonoMemPool *mp, MonoJumpInfo *ji, guint8 *buf, guint8 **endbuf)
2202 {
2203 guint8 *p = buf;
2204 gpointer *table;
2205 MonoImage *image;
2206 int i;
2207
2208 switch (ji->type) {
2209 case MONO_PATCH_INFO_METHOD:
2210 case MONO_PATCH_INFO_METHOD_JUMP:
2211 case MONO_PATCH_INFO_ICALL_ADDR:
2212 case MONO_PATCH_INFO_METHOD_RGCTX: {
2213 guint32 token;
2214 MonoMethod *method;
2215 gboolean no_aot_trampoline;
2216
2217 image = decode_method_ref (aot_module, &token, &method, &no_aot_trampoline, p, &p);
2218 if (!image)
2219 goto cleanup;
2220
2221 if (!method && !mono_aot_only && !no_aot_trampoline && (ji->type == MONO_PATCH_INFO_METHOD) && (mono_metadata_token_table (token) == MONO_TABLE_METHOD)) {
2222 ji->data.target = mono_create_ftnptr (mono_domain_get (), mono_create_jit_trampoline_from_token (image, token));
2223 ji->type = MONO_PATCH_INFO_ABS;
2224 }
2225 else {
2226 if (method)
2227 ji->data.method = method;
2228 else
2229 ji->data.method = mono_get_method (image, token, NULL);
2230 g_assert (ji->data.method);
2231 mono_class_init (ji->data.method->klass);
2232 }
2233 break;
2234 }
2235 case MONO_PATCH_INFO_INTERNAL_METHOD:
2236 case MONO_PATCH_INFO_JIT_ICALL_ADDR: {
2237 guint32 len = decode_value (p, &p);
2238
2239 ji->data.name = (char*)p;
2240 p += len + 1;
2241 break;
2242 }
2243 case MONO_PATCH_INFO_METHODCONST:
2244 /* Shared */
2245 ji->data.method = decode_method_ref_2 (aot_module, p, &p);
2246 if (!ji->data.method)
2247 goto cleanup;
2248 break;
2249 case MONO_PATCH_INFO_VTABLE:
2250 case MONO_PATCH_INFO_CLASS:
2251 case MONO_PATCH_INFO_IID:
2252 case MONO_PATCH_INFO_ADJUSTED_IID:
2253 /* Shared */
2254 ji->data.klass = decode_klass_ref (aot_module, p, &p);
2255 if (!ji->data.klass)
2256 goto cleanup;
2257 break;
2258 case MONO_PATCH_INFO_CLASS_INIT:
2259 case MONO_PATCH_INFO_DELEGATE_TRAMPOLINE:
2260 ji->data.klass = decode_klass_ref (aot_module, p, &p);
2261 if (!ji->data.klass)
2262 goto cleanup;
2263 break;
2264 case MONO_PATCH_INFO_IMAGE:
2265 ji->data.image = load_image (aot_module, decode_value (p, &p), TRUE);
2266 if (!ji->data.image)
2267 goto cleanup;
2268 break;
2269 case MONO_PATCH_INFO_FIELD:
2270 case MONO_PATCH_INFO_SFLDA:
2271 /* Shared */
2272 ji->data.field = decode_field_info (aot_module, p, &p);
2273 if (!ji->data.field)
2274 goto cleanup;
2275 break;
2276 case MONO_PATCH_INFO_SWITCH:
2277 ji->data.table = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoBBTable));
2278 ji->data.table->table_size = decode_value (p, &p);
2279 table = g_new (gpointer, ji->data.table->table_size);
2280 ji->data.table->table = (MonoBasicBlock**)table;
2281 for (i = 0; i < ji->data.table->table_size; i++)
2282 table [i] = (gpointer)(gssize)decode_value (p, &p);
2283 break;
2284 case MONO_PATCH_INFO_R4: {
2285 guint32 val;
2286
2287 ji->data.target = mono_domain_alloc0 (mono_domain_get (), sizeof (float));
2288 val = decode_value (p, &p);
2289 *(float*)ji->data.target = *(float*)&val;
2290 break;
2291 }
2292 case MONO_PATCH_INFO_R8: {
2293 guint32 val [2];
2294 guint64 v;
2295
2296 ji->data.target = mono_domain_alloc0 (mono_domain_get (), sizeof (double));
2297
2298 val [0] = decode_value (p, &p);
2299 val [1] = decode_value (p, &p);
2300 v = ((guint64)val [1] << 32) | ((guint64)val [0]);
2301 *(double*)ji->data.target = *(double*)&v;
2302 break;
2303 }
2304 case MONO_PATCH_INFO_LDSTR:
2305 image = load_image (aot_module, decode_value (p, &p), TRUE);
2306 if (!image)
2307 goto cleanup;
2308 ji->data.token = mono_jump_info_token_new (mp, image, MONO_TOKEN_STRING + decode_value (p, &p));
2309 break;
2310 case MONO_PATCH_INFO_RVA:
2311 case MONO_PATCH_INFO_DECLSEC:
2312 case MONO_PATCH_INFO_LDTOKEN:
2313 case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
2314 /* Shared */
2315 image = load_image (aot_module, decode_value (p, &p), TRUE);
2316 if (!image)
2317 goto cleanup;
2318 ji->data.token = mono_jump_info_token_new (mp, image, decode_value (p, &p));
2319
2320 ji->data.token->has_context = decode_value (p, &p);
2321 if (ji->data.token->has_context) {
2322 gboolean res = decode_generic_context (aot_module, &ji->data.token->context, p, &p);
2323 if (!res)
2324 goto cleanup;
2325 }
2326 break;
2327 case MONO_PATCH_INFO_EXC_NAME:
2328 ji->data.klass = decode_klass_ref (aot_module, p, &p);
2329 if (!ji->data.klass)
2330 goto cleanup;
2331 ji->data.name = ji->data.klass->name;
2332 break;
2333 case MONO_PATCH_INFO_METHOD_REL:
2334 ji->data.offset = decode_value (p, &p);
2335 break;
2336 case MONO_PATCH_INFO_INTERRUPTION_REQUEST_FLAG:
2337 case MONO_PATCH_INFO_GENERIC_CLASS_INIT:
2338 case MONO_PATCH_INFO_MONITOR_ENTER:
2339 case MONO_PATCH_INFO_MONITOR_EXIT:
2340 break;
2341 case MONO_PATCH_INFO_RGCTX_FETCH: {
2342 gboolean res;
2343 MonoJumpInfoRgctxEntry *entry;
2344
2345 entry = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoRgctxEntry));
2346 entry->method = decode_method_ref_2 (aot_module, p, &p);
2347 entry->in_mrgctx = decode_value (p, &p);
2348 entry->info_type = decode_value (p, &p);
2349 entry->data = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfo));
2350 entry->data->type = decode_value (p, &p);
2351
2352 res = decode_patch (aot_module, mp, entry->data, p, &p);
2353 if (!res)
2354 goto cleanup;
2355 ji->data.rgctx_entry = entry;
2356 break;
2357 }
2358 case MONO_PATCH_INFO_SEQ_POINT_INFO:
2359 break;
2360 case MONO_PATCH_INFO_LLVM_IMT_TRAMPOLINE: {
2361 MonoJumpInfoImtTramp *imt_tramp = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoImtTramp));
2362
2363 imt_tramp->method = decode_method_ref_2 (aot_module, p, &p);
2364 imt_tramp->vt_offset = decode_value (p, &p);
2365
2366 ji->data.imt_tramp = imt_tramp;
2367 break;
2368 }
2369 default:
2370 g_warning ("unhandled type %d", ji->type);
2371 g_assert_not_reached ();
2372 }
2373
2374 *endbuf = p;
2375
2376 return TRUE;
2377
2378 cleanup:
2379 return FALSE;
2380 }
2381
2382 static MonoJumpInfo*
2383 load_patch_info (MonoAotModule *aot_module, MonoMemPool *mp, int n_patches,
2384 guint32 **got_slots,
2385 guint8 *buf, guint8 **endbuf)
2386 {
2387 MonoJumpInfo *patches;
2388 int pindex;
2389 guint8 *p;
2390
2391 p = buf;
2392
2393 patches = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfo) * n_patches);
2394
2395 *got_slots = g_malloc (sizeof (guint32) * n_patches);
2396
2397 for (pindex = 0; pindex < n_patches; ++pindex) {
2398 MonoJumpInfo *ji = &patches [pindex];
2399 guint8 *shared_p;
2400 gboolean res;
2401 guint32 got_offset;
2402
2403 got_offset = decode_value (p, &p);
2404
2405 if (aot_module->got [got_offset]) {
2406 /* Already loaded */
2407 //printf ("HIT!\n");
2408 } else {
2409 shared_p = aot_module->blob + mono_aot_get_offset (aot_module->got_info_offsets, got_offset);
2410
2411 ji->type = decode_value (shared_p, &shared_p);
2412
2413 res = decode_patch (aot_module, mp, ji, shared_p, &shared_p);
2414 if (!res)
2415 goto cleanup;
2416 }
2417
2418 (*got_slots) [pindex] = got_offset;
2419 }
2420
2421 *endbuf = p;
2422 return patches;
2423
2424 cleanup:
2425 g_free (*got_slots);
2426 *got_slots = NULL;
2427
2428 return NULL;
2429 }
2430
2431 static void
2432 register_jump_target_got_slot (MonoDomain *domain, MonoMethod *method, gpointer *got_slot)
2433 {
2434 /*
2435 * Jump addresses cannot be patched by the trampoline code since it
2436 * does not have access to the caller's address. Instead, we collect
2437 * the addresses of the GOT slots pointing to a method, and patch
2438 * them after the method has been compiled.
2439 */
2440 MonoJitDomainInfo *info = domain_jit_info (domain);
2441 GSList *list;
2442
2443 mono_domain_lock (domain);
2444 if (!info->jump_target_got_slot_hash)
2445 info->jump_target_got_slot_hash = g_hash_table_new (NULL, NULL);
2446 list = g_hash_table_lookup (info->jump_target_got_slot_hash, method);
2447 list = g_slist_prepend (list, got_slot);
2448 g_hash_table_insert (info->jump_target_got_slot_hash, method, list);
2449 mono_domain_unlock (domain);
2450 }
2451
2452 /*
2453 * load_method:
2454 *
2455 * Load the method identified by METHOD_INDEX from the AOT image. Return a
2456 * pointer to the native code of the method, or NULL if not found.
2457 * METHOD might not be set if the caller only has the image/token info.
2458 */
2459 static gpointer
2460 load_method (MonoDomain *domain, MonoAotModule *amodule, MonoImage *image, MonoMethod *method, guint32 token, int method_index)
2461 {
2462 MonoClass *klass;
2463 gboolean from_plt = method == NULL;
2464 MonoMemPool *mp;
2465 int i, pindex, n_patches, used_strings;
2466 gboolean keep_patches = TRUE;
2467 guint8 *p;
2468 MonoJitInfo *jinfo = NULL;
2469 guint8 *code, *info;
2470
2471 if (mono_profiler_get_events () & MONO_PROFILE_ENTER_LEAVE)
2472 return NULL;
2473
2474 if ((domain != mono_get_root_domain ()) && (!(amodule->info.opts & MONO_OPT_SHARED)))
2475 /* Non shared AOT code can't be used in other appdomains */
2476 return NULL;
2477
2478 if (amodule->out_of_date)
2479 return NULL;
2480
2481 if (amodule->code_offsets [method_index] == 0xffffffff) {
2482 if (mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
2483 char *full_name;
2484
2485 if (!method)
2486 method = mono_get_method (image, token, NULL);
2487 full_name = mono_method_full_name (method, TRUE);
2488 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT NOT FOUND: %s.\n", full_name);
2489 g_free (full_name);
2490 }
2491 return NULL;
2492 }
2493
2494 code = &amodule->code [amodule->code_offsets [method_index]];
2495
2496 info = &amodule->blob [mono_aot_get_offset (amodule->method_info_offsets, method_index)];
2497
2498 mono_aot_lock ();
2499 if (!amodule->methods_loaded)
2500 amodule->methods_loaded = g_new0 (guint32, amodule->info.nmethods + 1);
2501 mono_aot_unlock ();
2502
2503 if ((amodule->methods_loaded [method_index / 32] >> (method_index % 32)) & 0x1)
2504 return code;
2505
2506 if (mono_last_aot_method != -1) {
2507 if (mono_jit_stats.methods_aot >= mono_last_aot_method)
2508 return NULL;
2509 else if (mono_jit_stats.methods_aot == mono_last_aot_method - 1) {
2510 if (method)
2511 printf ("LAST AOT METHOD: %s%s%s.%s.\n", method->klass->name_space, method->klass->name_space [0] ? "." : "", method->klass->name, method->name);
2512 else
2513 printf ("LAST AOT METHOD: %p %d\n", code, method_index);
2514 }
2515 }
2516
2517 p = info;
2518
2519 if (method) {
2520 klass = method->klass;
2521 decode_klass_ref (amodule, p, &p);
2522 } else {
2523 klass = decode_klass_ref (amodule, p, &p);
2524 }
2525
2526 if (amodule->info.opts & MONO_OPT_SHARED)
2527 used_strings = decode_value (p, &p);
2528 else
2529 used_strings = 0;
2530
2531 for (i = 0; i < used_strings; i++) {
2532 guint token = decode_value (p, &p);
2533 mono_ldstr (mono_get_root_domain (), image, mono_metadata_token_index (token));
2534 }
2535
2536 if (amodule->info.opts & MONO_OPT_SHARED)
2537 keep_patches = FALSE;
2538
2539 n_patches = decode_value (p, &p);
2540
2541 keep_patches = FALSE;
2542
2543 if (n_patches) {
2544 MonoJumpInfo *patches;
2545 guint32 *got_slots;
2546
2547 if (keep_patches)
2548 mp = domain->mp;
2549 else
2550 mp = mono_mempool_new ();
2551
2552 patches = load_patch_info (amodule, mp, n_patches, &got_slots, p, &p);
2553 if (patches == NULL)
2554 goto cleanup;
2555
2556 for (pindex = 0; pindex < n_patches; ++pindex) {
2557 MonoJumpInfo *ji = &patches [pindex];
2558
2559 if (!amodule->got [got_slots [pindex]]) {
2560 amodule->got [got_slots [pindex]] = mono_resolve_patch_target (method, domain, code, ji, TRUE);
2561 if (ji->type == MONO_PATCH_INFO_METHOD_JUMP)
2562 amodule->got [got_slots [pindex]] = mono_create_ftnptr (domain, amodule->got [got_slots [pindex]]);
2563 if (ji->type == MONO_PATCH_INFO_METHOD_JUMP)
2564 register_jump_target_got_slot (domain, ji->data.method, &(amodule->got [got_slots [pindex]]));
2565 }
2566 ji->type = MONO_PATCH_INFO_NONE;
2567 }
2568
2569 g_free (got_slots);
2570
2571 if (!keep_patches)
2572 mono_mempool_destroy (mp);
2573 }
2574
2575 if (mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
2576 char *full_name;
2577
2578 if (!method)
2579 method = mono_get_method (image, token, NULL);
2580
2581 full_name = mono_method_full_name (method, TRUE);
2582
2583 if (!jinfo)
2584 jinfo = mono_aot_find_jit_info (domain, amodule->assembly->image, code);
2585
2586 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);
2587 g_free (full_name);
2588 }
2589
2590 mono_aot_lock ();
2591
2592 mono_jit_stats.methods_aot++;
2593
2594 amodule->methods_loaded [method_index / 32] |= 1 << (method_index % 32);
2595
2596 init_plt (amodule);
2597
2598 if (method && method->wrapper_type)
2599 g_hash_table_insert (amodule->method_to_code, method, code);
2600
2601 mono_aot_unlock ();
2602
2603 if (mono_profiler_get_events () & MONO_PROFILE_JIT_COMPILATION) {
2604 MonoJitInfo *jinfo;
2605
2606 if (!method) {
2607 method = mono_get_method (image, token, NULL);
2608 g_assert (method);
2609 }
2610 mono_profiler_method_jit (method);
2611 jinfo = mono_jit_info_table_find (domain, (char*)code);
2612 g_assert (jinfo);
2613 mono_profiler_method_end_jit (method, jinfo, MONO_PROFILE_OK);
2614 }
2615
2616 if (from_plt && klass && !klass->generic_container)
2617 mono_runtime_class_init (mono_class_vtable (domain, klass));
2618
2619 return code;
2620
2621 cleanup:
2622 /* FIXME: The space in domain->mp is wasted */
2623 if (amodule->info.opts & MONO_OPT_SHARED)
2624 /* No need to cache patches */
2625 mono_mempool_destroy (mp);
2626
2627 if (jinfo)
2628 g_free (jinfo);
2629
2630 return NULL;
2631 }
2632
2633 static guint32
2634 find_extra_method_in_amodule (MonoAotModule *amodule, MonoMethod *method, const char *name)
2635 {
2636 guint32 table_size, entry_size, hash;
2637 guint32 *table, *entry;
2638 guint32 index;
2639 static guint32 n_extra_decodes;
2640
2641 if (!amodule)
2642 return 0xffffff;
2643
2644 table_size = amodule->extra_method_table [0];
2645 table = amodule->extra_method_table + 1;
2646 entry_size = 3;
2647
2648 hash = mono_aot_method_hash (method) % table_size;
2649
2650 entry = &table [hash * entry_size];
2651
2652 if (entry [0] == 0)
2653 return 0xffffff;
2654
2655 index = 0xffffff;
2656 while (TRUE) {
2657 guint32 key = entry [0];
2658 guint32 value = entry [1];
2659 guint32 next = entry [entry_size - 1];
2660 MonoMethod *m;
2661 guint8 *p;
2662 int is_wrapper_name;
2663
2664 p = amodule->blob + key;
2665 is_wrapper_name = decode_value (p, &p);
2666 if (is_wrapper_name) {
2667 int wrapper_type = decode_value (p, &p);
2668 if (wrapper_type == method->wrapper_type && !strcmp (name, (char*)p)) {
2669 index = value;
2670 break;
2671 }
2672 } else if (can_method_ref_match_method (amodule, p, method)) {
2673 mono_aot_lock ();
2674 if (!amodule->method_ref_to_method)
2675 amodule->method_ref_to_method = g_hash_table_new (NULL, NULL);
2676 m = g_hash_table_lookup (amodule->method_ref_to_method, p);
2677 mono_aot_unlock ();
2678 if (!m) {
2679 guint8 *orig_p = p;
2680 m = decode_method_ref_2 (amodule, p, &p);
2681 if (m) {
2682 mono_aot_lock ();
2683 g_hash_table_insert (amodule->method_ref_to_method, orig_p, m);
2684 mono_aot_unlock ();
2685 }
2686 }
2687 if (m == method) {
2688 index = value;
2689 break;
2690 }
2691
2692 /* Special case: wrappers of shared generic methods */
2693 if (m && method->wrapper_type && m->wrapper_type == m->wrapper_type &&
2694 method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED) {
2695 MonoMethod *w1 = mono_marshal_method_from_wrapper (method);
2696 MonoMethod *w2 = mono_marshal_method_from_wrapper (m);
2697
2698 if (w1->is_inflated && ((MonoMethodInflated *)w1)->declaring == w2) {
2699 index = value;
2700 break;
2701 }
2702 }
2703
2704 /* Methods decoded needlessly */
2705 /*
2706 if (m)
2707 printf ("%d %s %s\n", n_extra_decodes, mono_method_full_name (method, TRUE), mono_method_full_name (m, TRUE));
2708 */
2709 n_extra_decodes ++;
2710 }
2711
2712 if (next != 0)
2713 entry = &table [next * entry_size];
2714 else
2715 break;
2716 }
2717
2718 return index;
2719 }
2720
2721 static void
2722 add_module_cb (gpointer key, gpointer value, gpointer user_data)
2723 {
2724 g_ptr_array_add ((GPtrArray*)user_data, value);
2725 }
2726
2727 /*
2728 * find_extra_method:
2729 *
2730 * Try finding METHOD in the extra_method table in all AOT images.
2731 * Return its method index, or 0xffffff if not found. Set OUT_AMODULE to the AOT
2732 * module where the method was found.
2733 */
2734 static guint32
2735 find_extra_method (MonoMethod *method, MonoAotModule **out_amodule)
2736 {
2737 guint32 index;
2738 GPtrArray *modules;
2739 int i;
2740 char *name = NULL;
2741
2742 if (method->wrapper_type)
2743 name = mono_aot_wrapper_name (method);
2744
2745 /* Try the method's module first */
2746 *out_amodule = method->klass->image->aot_module;
2747 index = find_extra_method_in_amodule (method->klass->image->aot_module, method, name);
2748 if (index != 0xffffff) {
2749 g_free (name);
2750 return index;
2751 }
2752
2753 /*
2754 * Try all other modules.
2755 * This is needed because generic instances klass->image points to the image
2756 * containing the generic definition, but the native code is generated to the
2757 * AOT image which contains the reference.
2758 */
2759
2760 /* Make a copy to avoid doing the search inside the aot lock */
2761 modules = g_ptr_array_new ();
2762 mono_aot_lock ();
2763 g_hash_table_foreach (aot_modules, add_module_cb, modules);
2764 mono_aot_unlock ();
2765
2766 index = 0xffffff;
2767 for (i = 0; i < modules->len; ++i) {
2768 MonoAotModule *amodule = g_ptr_array_index (modules, i);
2769
2770 if (amodule != method->klass->image->aot_module)
2771 index = find_extra_method_in_amodule (amodule, method, name);
2772 if (index != 0xffffff) {
2773 *out_amodule = amodule;
2774 break;
2775 }
2776 }
2777
2778 g_ptr_array_free (modules, TRUE);
2779
2780 g_free (name);
2781 return index;
2782 }
2783
2784 /*
2785 * mono_aot_get_method:
2786 *
2787 * Return a pointer to the AOTed native code for METHOD if it can be found,
2788 * NULL otherwise.
2789 * On platforms with function pointers, this doesn't return a function pointer.
2790 */
2791 gpointer
2792 mono_aot_get_method (MonoDomain *domain, MonoMethod *method)
2793 {
2794 MonoClass *klass = method->klass;
2795 guint32 method_index;
2796 MonoAotModule *amodule = klass->image->aot_module;
2797 guint8 *code;
2798
2799 if (!amodule)
2800 return NULL;
2801
2802 if (amodule->out_of_date)
2803 return NULL;
2804
2805 if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
2806 (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
2807 (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
2808 (method->flags & METHOD_ATTRIBUTE_ABSTRACT))
2809 return NULL;
2810
2811 /*
2812 * Use the original method instead of its invoke-with-check wrapper.
2813 * This is not a problem when using full-aot, since it doesn't support
2814 * remoting.
2815 */
2816 if (mono_aot_only && method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK)
2817 return mono_aot_get_method (domain, mono_marshal_method_from_wrapper (method));
2818
2819 g_assert (klass->inited);
2820
2821 /* Find method index */
2822 if (method->is_inflated && mono_method_is_generic_sharable_impl (method, FALSE)) {
2823 method = mono_method_get_declaring_generic_method (method);
2824 method_index = mono_metadata_token_index (method->token) - 1;
2825 } else if (method->is_inflated || !method->token) {
2826 /* This hash table is used to avoid the slower search in the extra_method_table in the AOT image */
2827 mono_aot_lock ();
2828 code = g_hash_table_lookup (amodule->method_to_code, method);
2829 mono_aot_unlock ();
2830 if (code)
2831 return code;
2832
2833 method_index = find_extra_method (method, &amodule);
2834 /*
2835 * Special case the ICollection<T> wrappers for arrays, as they cannot
2836 * be statically enumerated, and each wrapper ends up calling the same
2837 * method in Array.
2838 */
2839 if (method_index == 0xffffff && method->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED && method->klass->rank && strstr (method->name, "System.Collections.Generic")) {
2840 MonoMethod *m = mono_aot_get_array_helper_from_wrapper (method);
2841
2842 code = mono_aot_get_method (domain, m);
2843 if (code) {
2844 if (mono_method_needs_static_rgctx_invoke (m, FALSE)) {
2845 code = mono_create_static_rgctx_trampoline (m, mono_create_ftnptr (domain, code));
2846 /* The call above returns an ftnptr */
2847 code = mono_get_addr_from_ftnptr (code);
2848 }
2849
2850 return code;
2851 }
2852 }
2853
2854 /*
2855 * Special case Array.GetGenericValueImpl which is a generic icall.
2856 * Generic sharing currently can't handle it, but the icall returns data using
2857 * an out parameter, so the managed-to-native wrappers can share the same code.
2858 */
2859 if (method_index == 0xffffff && method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE && method->klass == mono_defaults.array_class && !strcmp (method->name, "GetGenericValueImpl")) {
2860 MonoMethod *m;
2861 MonoGenericContext ctx;
2862 MonoType *args [16];
2863
2864 if (mono_method_signature (method)->params [1]->type == MONO_TYPE_OBJECT)
2865 /* Avoid recursion */
2866 return NULL;
2867
2868 m = mono_class_get_method_from_name (mono_defaults.array_class, "GetGenericValueImpl", 2);
2869 g_assert (m);
2870
2871 memset (&ctx, 0, sizeof (ctx));
2872 args [0] = &mono_defaults.object_class->byval_arg;
2873 ctx.method_inst = mono_metadata_get_generic_inst (1, args);
2874
2875 m = mono_marshal_get_native_wrapper (mono_class_inflate_generic_method (m, &ctx), TRUE, TRUE);
2876
2877 /*
2878 * Get the code for the <object> instantiation which should be emitted into
2879 * the mscorlib aot image by the AOT compiler.
2880 */
2881 code = mono_aot_get_method (domain, m);
2882 if (code)
2883 return code;
2884 }
2885
2886 if (method_index == 0xffffff) {
2887 if (mono_aot_only && mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
2888 char *full_name;
2889
2890 full_name = mono_method_full_name (method, TRUE);
2891 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT NOT FOUND: %s.\n", full_name);
2892 g_free (full_name);
2893 }
2894 return NULL;
2895 }
2896
2897 if (method_index == 0xffffff)
2898 return NULL;
2899
2900 /* Needed by find_jit_info */
2901 mono_aot_lock ();
2902 if (!amodule->extra_methods)
2903 amodule->extra_methods = g_hash_table_new (NULL, NULL);
2904 g_hash_table_insert (amodule->extra_methods, GUINT_TO_POINTER (method_index), method);
2905 mono_aot_unlock ();
2906 } else {
2907 /* Common case */
2908 method_index = mono_metadata_token_index (method->token) - 1;
2909 }
2910
2911 return load_method (domain, amodule, klass->image, method, method->token, method_index);
2912 }
2913
2914 /**
2915 * Same as mono_aot_get_method, but we try to avoid loading any metadata from the
2916 * method.
2917 */
2918 gpointer
2919 mono_aot_get_method_from_token (MonoDomain *domain, MonoImage *image, guint32 token)
2920 {
2921 MonoAotModule *aot_module = image->aot_module;
2922 int method_index;
2923
2924 if (!aot_module)
2925 return NULL;
2926
2927 method_index = mono_metadata_token_index (token) - 1;
2928
2929 return load_method (domain, aot_module, image, NULL, token, method_index);
2930 }
2931
2932 typedef struct {
2933 guint8 *addr;
2934 gboolean res;
2935 } IsGotEntryUserData;
2936
2937 static void
2938 check_is_got_entry (gpointer key, gpointer value, gpointer user_data)
2939 {
2940 IsGotEntryUserData *data = (IsGotEntryUserData*)user_data;
2941 MonoAotModule *aot_module = (MonoAotModule*)value;
2942
2943 if (aot_module->got && (data->addr >= (guint8*)(aot_module->got)) && (data->addr < (guint8*)(aot_module->got + aot_module->info.got_size)))
2944 data->res = TRUE;
2945 }
2946
2947 gboolean
2948 mono_aot_is_got_entry (guint8 *code, guint8 *addr)
2949 {
2950 IsGotEntryUserData user_data;
2951
2952 if (!aot_modules)
2953 return FALSE;
2954
2955 user_data.addr = addr;
2956 user_data.res = FALSE;
2957 mono_aot_lock ();
2958 g_hash_table_foreach (aot_modules, check_is_got_entry, &user_data);
2959 mono_aot_unlock ();
2960
2961 return user_data.res;
2962 }
2963
2964 typedef struct {
2965 guint8 *addr;
2966 MonoAotModule *module;
2967 } FindAotModuleUserData;
2968
2969 static void
2970 find_aot_module_cb (gpointer key, gpointer value, gpointer user_data)
2971 {
2972 FindAotModuleUserData *data = (FindAotModuleUserData*)user_data;
2973 MonoAotModule *aot_module = (MonoAotModule*)value;
2974
2975 if ((data->addr >= (guint8*)(aot_module->code)) && (data->addr < (guint8*)(aot_module->code_end)))
2976 data->module = aot_module;
2977 }
2978
2979 static inline MonoAotModule*
2980 find_aot_module (guint8 *code)
2981 {
2982 FindAotModuleUserData user_data;
2983
2984 if (!aot_modules)
2985 return NULL;
2986
2987 /* Reading these need no locking */
2988 if (((gsize)code < aot_code_low_addr) || ((gsize)code > aot_code_high_addr))
2989 return NULL;
2990
2991 user_data.addr = code;
2992 user_data.module = NULL;
2993
2994 mono_aot_lock ();
2995 g_hash_table_foreach (aot_modules, find_aot_module_cb, &user_data);
2996 mono_aot_unlock ();
2997
2998 return user_data.module;
2999 }
3000
3001 /*
3002 * mono_aot_plt_resolve:
3003 *
3004 * This function is called by the entries in the PLT to resolve the actual method that
3005 * needs to be called. It returns a trampoline to the method and patches the PLT entry.
3006 * Returns NULL if the something cannot be loaded.
3007 */
3008 gpointer
3009 mono_aot_plt_resolve (gpointer aot_module, guint32 plt_info_offset, guint8 *code)
3010 {
3011 #ifdef MONO_ARCH_AOT_SUPPORTED
3012 guint8 *p, *target, *plt_entry;
3013 MonoJumpInfo ji;
3014 MonoAotModule *module = (MonoAotModule*)aot_module;
3015 gboolean res, no_ftnptr = FALSE;
3016 MonoMemPool *mp;
3017
3018 //printf ("DYN: %p %d\n", aot_module, plt_info_offset);
3019
3020 p = &module->blob [plt_info_offset];
3021
3022 ji.type = decode_value (p, &p);
3023
3024 mp = mono_mempool_new_size (512);
3025 res = decode_patch (module, mp, &ji, p, &p);
3026
3027 if (!res) {
3028 mono_mempool_destroy (mp);
3029 return NULL;
3030 }
3031
3032 /*
3033 * Avoid calling resolve_patch_target in the full-aot case if possible, since
3034 * it would create a trampoline, and we don't need that.
3035 * We could do this only if the method does not need the special handling
3036 * in mono_magic_trampoline ().
3037 */
3038 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) &&
3039 !mono_method_needs_static_rgctx_invoke (ji.data.method, FALSE)) {
3040 target = mono_jit_compile_method (ji.data.method);
3041 no_ftnptr = TRUE;
3042 } else {
3043 target = mono_resolve_patch_target (NULL, mono_domain_get (), NULL, &ji, TRUE);
3044 }
3045
3046 /*
3047 * The trampoline expects us to return a function descriptor on platforms which use
3048 * it, but resolve_patch_target returns a direct function pointer for some type of
3049 * patches, so have to translate between the two.
3050 * FIXME: Clean this up, but how ?
3051 */
3052 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) {
3053 /* These should already have a function descriptor */
3054 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
3055 /* Our function descriptors have a 0 environment, gcc created ones don't */
3056 if (ji.type != MONO_PATCH_INFO_INTERNAL_METHOD && ji.type != MONO_PATCH_INFO_JIT_ICALL_ADDR && ji.type != MONO_PATCH_INFO_ICALL_ADDR)
3057 g_assert (((gpointer*)target) [2] == 0);
3058 #endif
3059 /* Empty */
3060 } else if (!no_ftnptr) {
3061 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
3062 g_assert (((gpointer*)target) [2] != 0);
3063 #endif
3064 target = mono_create_ftnptr (mono_domain_get (), target);
3065 }
3066
3067 mono_mempool_destroy (mp);
3068
3069 /* Patch the PLT entry with target which might be the actual method not a trampoline */
3070 plt_entry = mono_aot_get_plt_entry (code);
3071 g_assert (plt_entry);
3072 mono_arch_patch_plt_entry (plt_entry, module->got, NULL, target);
3073
3074 return target;
3075 #else
3076 g_assert_not_reached ();
3077 return NULL;
3078 #endif
3079 }
3080
3081 /**
3082 * init_plt:
3083 *
3084 * Initialize the PLT table of the AOT module. Called lazily when the first AOT
3085 * method in the module is loaded to avoid committing memory by writing to it.
3086 * LOCKING: Assumes the AOT lock is held.
3087 */
3088 static void
3089 init_plt (MonoAotModule *amodule)
3090 {
3091 #ifndef MONO_CROSS_COMPILE
3092
3093 #ifdef MONO_ARCH_AOT_SUPPORTED
3094 #ifdef __i386__
3095 guint8 *buf = amodule->plt;
3096 #elif defined(__x86_64__) || defined(__arm__) || defined(__mono_ppc__)
3097 int i;
3098 gpointer plt_0;
3099 #endif
3100 gpointer tramp;
3101
3102 if (amodule->plt_inited)
3103 return;
3104
3105 tramp = mono_create_specific_trampoline (amodule, MONO_TRAMPOLINE_AOT_PLT, mono_get_root_domain (), NULL);
3106
3107 #ifdef __i386__
3108 /* Initialize the first PLT entry */
3109 make_writable (amodule->plt, amodule->plt_end - amodule->plt);
3110 x86_jump_code (buf, tramp);
3111 #elif defined(__x86_64__) || defined(__arm__) || defined(__mono_ppc__)
3112 /*
3113 * Initialize the PLT entries in the GOT to point to the default targets.
3114 */
3115
3116 tramp = mono_create_ftnptr (mono_domain_get (), tramp);
3117 plt_0 = mono_create_ftnptr (mono_domain_get (), amodule->plt);
3118 /* The first entry points to the AOT trampoline */
3119 ((gpointer*)amodule->got)[amodule->info.plt_got_offset_base] = tramp;
3120 for (i = 1; i < amodule->info.plt_size; ++i)
3121 /* All the default entries point to the first entry */
3122 ((gpointer*)amodule->got)[amodule->info.plt_got_offset_base + i] = plt_0;
3123 #else
3124 g_assert_not_reached ();
3125 #endif
3126
3127 amodule->plt_inited = TRUE;
3128 #endif
3129
3130 #endif /* MONO_CROSS_COMPILE */
3131 }
3132
3133 /*
3134 * mono_aot_get_plt_entry:
3135 *
3136 * Return the address of the PLT entry called by the code at CODE if exists.
3137 */
3138 guint8*
3139 mono_aot_get_plt_entry (guint8 *code)
3140 {
3141 MonoAotModule *aot_module = find_aot_module (code);
3142 #if defined(__arm__) || defined(__mono_ppc__)
3143 guint32 ins;
3144 #endif
3145
3146 if (!aot_module)
3147 return NULL;
3148
3149 #if defined(__i386__) || defined(__x86_64__)
3150 if (code [-5] == 0xe8) {
3151 guint32 disp = *(guint32*)(code - 4);
3152 guint8 *target = code + disp;
3153
3154 if ((target >= (guint8*)(aot_module->plt)) && (target < (guint8*)(aot_module->plt_end)))
3155 return target;
3156 }
3157 #elif defined(__arm__)
3158 ins = ((guint32*)(gpointer)code) [-1];
3159
3160 /* Should be a 'bl' */
3161 if ((((ins >> 25) & 0x7) == 0x5) && (((ins >> 24) & 0x1) == 0x1)) {
3162 gint32 disp = ((gint32)ins) & 0xffffff;
3163 guint8 *target = code - 4 + 8 + (disp * 4);
3164
3165 if ((target >= (guint8*)(aot_module->plt)) && (target < (guint8*)(aot_module->plt_end)))
3166 return target;
3167 }
3168 #elif defined(__mono_ppc__)
3169 /* Should be a bl */
3170 ins = ((guint32*)(gpointer)code) [-1];
3171
3172 if ((ins >> 26 == 18) && ((ins & 1) == 1) && ((ins & 2) == 0)) {
3173 gint32 disp = (((gint32)ins) >> 2) & 0xffffff;
3174 guint8 *target = code - 4 + (disp * 4);
3175
3176 if ((target >= (guint8*)(aot_module->plt)) && (target < (guint8*)(aot_module->plt_end)))
3177 return target;
3178 }
3179 #else
3180 g_assert_not_reached ();
3181 #endif
3182
3183 return NULL;
3184 }
3185
3186 /*
3187 * mono_aot_get_plt_info_offset:
3188 *
3189 * Return the PLT info offset belonging to the plt entry called by CODE.
3190 */
3191 guint32
3192 mono_aot_get_plt_info_offset (mgreg_t *regs, guint8 *code)
3193 {
3194 guint8 *plt_entry = mono_aot_get_plt_entry (code);
3195
3196 g_assert (plt_entry);
3197
3198 /* The offset is embedded inside the code after the plt entry */
3199 #if defined(__i386__)
3200 return *(guint32*)(plt_entry + 5);
3201 #elif defined(__x86_64__)
3202 return *(guint32*)(plt_entry + 6);
3203 #elif defined(__arm__)
3204 /* The offset is stored as the 4th word of the plt entry */
3205 return ((guint32*)plt_entry) [3];
3206 #elif defined(__mono_ppc__)
3207 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
3208 return ((guint32*)plt_entry) [8];
3209 #else
3210 return ((guint32*)plt_entry) [6];
3211 #endif
3212 #else
3213 g_assert_not_reached ();
3214 return 0;
3215 #endif
3216 }
3217
3218 static gpointer
3219 mono_create_ftnptr_malloc (guint8 *code)
3220 {
3221 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
3222 MonoPPCFunctionDescriptor *ftnptr = g_malloc0 (sizeof (MonoPPCFunctionDescriptor));
3223
3224 ftnptr->code = code;
3225 ftnptr->toc = NULL;
3226 ftnptr->env = NULL;
3227
3228 return ftnptr;
3229 #else
3230 return code;
3231 #endif
3232 }
3233
3234 /*
3235 * load_function:
3236 *
3237 * Load the function named NAME from the aot image.
3238 */
3239 static gpointer
3240 load_function (MonoAotModule *amodule, const char *name)
3241 {
3242 char *symbol;
3243 guint8 *p;
3244 int n_patches, pindex;
3245 MonoMemPool *mp;
3246 gpointer code;
3247
3248 /* Load the code */
3249
3250 symbol = g_strdup_printf ("%s", name);
3251 find_symbol (amodule->sofile, amodule->globals, symbol, (gpointer *)&code);
3252 g_free (symbol);
3253 if (!code)
3254 g_error ("Symbol '%s' not found in AOT file '%s'.\n", name, amodule->aot_name);
3255
3256 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT FOUND function '%s' in AOT file '%s'.\n", name, amodule->aot_name);
3257
3258 /* Load info */
3259
3260 symbol = g_strdup_printf ("%s_p", name);
3261 find_symbol (amodule->sofile, amodule->globals, symbol, (gpointer *)&p);
3262 g_free (symbol);
3263 if (!p)
3264 /* Nothing to patch */
3265 return code;
3266
3267 p = amodule->blob + *(guint32*)p;
3268
3269 /* Similar to mono_aot_load_method () */
3270
3271 n_patches = decode_value (p, &p);
3272
3273 if (n_patches) {
3274 MonoJumpInfo *patches;
3275 guint32 *got_slots;
3276
3277 mp = mono_mempool_new ();
3278
3279 patches = load_patch_info (amodule, mp, n_patches, &got_slots, p, &p);
3280 g_assert (patches);
3281
3282 for (pindex = 0; pindex < n_patches; ++pindex) {
3283 MonoJumpInfo *ji = &patches [pindex];
3284 gpointer target;
3285
3286 if (amodule->got [got_slots [pindex]])
3287 continue;
3288
3289 /*
3290 * When this code is executed, the runtime may not be initalized yet, so
3291 * resolve the patch info by hand.
3292 */
3293 if (ji->type == MONO_PATCH_INFO_JIT_ICALL_ADDR) {
3294 if (!strcmp (ji->data.name, "mono_get_lmf_addr")) {
3295 target = mono_get_lmf_addr;
3296 } else if (!strcmp (ji->data.name, "mono_thread_force_interruption_checkpoint")) {
3297 target = mono_thread_force_interruption_checkpoint;
3298 } else if (!strcmp (ji->data.name, "mono_exception_from_token")) {
3299 target = mono_exception_from_token;
3300 } else if (!strcmp (ji->data.name, "mono_throw_exception")) {
3301 target = mono_get_throw_exception ();
3302 #ifdef __x86_64__
3303 } else if (!strcmp (ji->data.name, "mono_amd64_throw_exception")) {
3304 target = mono_amd64_throw_exception;
3305 #endif
3306 #ifdef __x86_64__
3307 } else if (!strcmp (ji->data.name, "mono_amd64_get_original_ip")) {
3308 target = mono_amd64_get_original_ip;
3309 #endif
3310 #ifdef __arm__
3311 } else if (!strcmp (ji->data.name, "mono_arm_throw_exception")) {
3312 target = mono_arm_throw_exception;
3313 } else if (!strcmp (ji->data.name, "mono_arm_throw_exception_by_token")) {
3314 target = mono_arm_throw_exception_by_token;
3315 #endif
3316 #ifdef __mono_ppc__
3317 } else if (!strcmp (ji->data.name, "mono_ppc_throw_exception")) {
3318 target = mono_ppc_throw_exception;
3319 #endif
3320 } else if (strstr (ji->data.name, "trampoline_func_") == ji->data.name) {
3321 int tramp_type2 = atoi (ji->data.name + strlen ("trampoline_func_"));
3322 target = (gpointer)mono_get_trampoline_func (tramp_type2);
3323 } else if (strstr (ji->data.name, "specific_trampoline_lazy_fetch_") == ji->data.name) {
3324 /* atoll is needed because the the offset is unsigned */
3325 guint32 slot;
3326 int res;
3327
3328 res = sscanf (ji->data.name, "specific_trampoline_lazy_fetch_%u", &slot);
3329 g_assert (res == 1);
3330 target = mono_create_specific_trampoline (GUINT_TO_POINTER (slot), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), NULL);
3331 target = mono_create_ftnptr_malloc (target);
3332 } else if (!strcmp (ji->data.name, "specific_trampoline_monitor_enter")) {
3333 target = mono_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_ENTER, mono_get_root_domain (), NULL);
3334 target = mono_create_ftnptr_malloc (target);
3335 } else if (!strcmp (ji->data.name, "specific_trampoline_monitor_exit")) {
3336 target = mono_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_EXIT, mono_get_root_domain (), NULL);
3337 target = mono_create_ftnptr_malloc (target);
3338 } else if (!strcmp (ji->data.name, "specific_trampoline_generic_class_init")) {
3339 target = mono_create_specific_trampoline (NULL, MONO_TRAMPOLINE_GENERIC_CLASS_INIT, mono_get_root_domain (), NULL);
3340 target = mono_create_ftnptr_malloc (target);
3341 } else if (!strcmp (ji->data.name, "mono_thread_get_and_clear_pending_exception")) {
3342 target = mono_thread_get_and_clear_pending_exception;
3343 } else {
3344 fprintf (stderr, "Unknown relocation '%s'\n", ji->data.name);
3345 g_assert_not_reached ();
3346 target = NULL;
3347 }
3348 } else {
3349 /* Hopefully the code doesn't have patches which need method or
3350 * domain to be set.
3351 */
3352 target = mono_resolve_patch_target (NULL, NULL, code, ji, FALSE);
3353 g_assert (target);
3354 }
3355
3356 amodule->got [got_slots [pindex]] = target;
3357 }
3358
3359 g_free (got_slots);
3360
3361 mono_mempool_destroy (mp);
3362 }
3363
3364 return code;
3365 }
3366
3367 /*
3368 * Return the piece of code identified by NAME from the mscorlib AOT file.
3369 * On ppc64, this returns a function descriptor.
3370 */
3371 gpointer
3372 mono_aot_get_named_code (const char *name)
3373 {
3374 MonoImage *image;
3375 MonoAotModule *amodule;
3376
3377 image = mono_defaults.corlib;
3378 g_assert (image);
3379
3380 amodule = image->aot_module;
3381 g_assert (amodule);
3382
3383 return mono_create_ftnptr_malloc (load_function (amodule, name));
3384 }
3385
3386 /* Return a given kind of trampoline */
3387 static gpointer
3388 get_numerous_trampoline (MonoAotTrampoline tramp_type, int n_got_slots, MonoAotModule **out_amodule, guint32 *got_offset, guint32 *out_tramp_size)
3389 {
3390 MonoAotModule *amodule;
3391 int index, tramp_size;
3392 MonoImage *image;
3393
3394 /* Currently, we keep all trampolines in the mscorlib AOT image */
3395 image = mono_defaults.corlib;
3396 g_assert (image);
3397
3398 mono_aot_lock ();
3399
3400 amodule = image->aot_module;
3401 g_assert (amodule);
3402
3403 *out_amodule = amodule;
3404
3405 if (amodule->trampoline_index [tramp_type] == amodule->info.num_trampolines [tramp_type])
3406 g_error ("Ran out of trampolines of type %d in '%s' (%d)\n", tramp_type, image->name, amodule->info.num_trampolines [tramp_type]);
3407
3408 index = amodule->trampoline_index [tramp_type] ++;
3409
3410 mono_aot_unlock ();
3411
3412 *got_offset = amodule->info.trampoline_got_offset_base [tramp_type] + (index * n_got_slots);
3413
3414 tramp_size = amodule->info.trampoline_size [tramp_type];
3415
3416 if (out_tramp_size)
3417 *out_tramp_size = tramp_size;
3418
3419 return amodule->trampolines [tramp_type] + (index * tramp_size);
3420 }
3421
3422 /*
3423 * Return a specific trampoline from the AOT file.
3424 */
3425 gpointer
3426 mono_aot_create_specific_trampoline (MonoImage *image, gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
3427 {
3428 MonoAotModule *amodule;
3429 guint32 got_offset, tramp_size;
3430 guint8 *code, *tramp;
3431 static gpointer generic_trampolines [MONO_TRAMPOLINE_NUM];
3432 static gboolean inited;
3433 static guint32 num_trampolines;
3434
3435 if (!inited) {
3436 mono_aot_lock ();
3437
3438 if (!inited) {
3439 mono_counters_register ("Specific trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &num_trampolines);
3440 inited = TRUE;
3441 }
3442
3443 mono_aot_unlock ();
3444 }
3445
3446 num_trampolines ++;
3447
3448 if (!generic_trampolines [tramp_type]) {
3449 char *symbol;
3450
3451 symbol = g_strdup_printf ("generic_trampoline_%d", tramp_type);
3452 generic_trampolines [tramp_type] = mono_aot_get_named_code (symbol);
3453 g_free (symbol);
3454 }
3455
3456 tramp = generic_trampolines [tramp_type];
3457 g_assert (tramp);
3458
3459 code = get_numerous_trampoline (MONO_AOT_TRAMP_SPECIFIC, 2, &amodule, &got_offset, &tramp_size);
3460
3461 amodule->got [got_offset] = tramp;
3462 amodule->got [got_offset + 1] = arg1;
3463
3464 if (code_len)
3465 *code_len = tramp_size;
3466
3467 return code;
3468 }
3469
3470 gpointer
3471 mono_aot_get_static_rgctx_trampoline (gpointer ctx, gpointer addr)
3472 {
3473 MonoAotModule *amodule;
3474 guint8 *code;
3475 guint32 got_offset;
3476
3477 code = get_numerous_trampoline (MONO_AOT_TRAMP_STATIC_RGCTX, 2, &amodule, &got_offset, NULL);
3478
3479 amodule->got [got_offset] = ctx;
3480 amodule->got [got_offset + 1] = addr;
3481
3482 /* The caller expects an ftnptr */
3483 return mono_create_ftnptr (mono_domain_get (), code);
3484 }
3485
3486 gpointer
3487 mono_aot_get_unbox_trampoline (MonoMethod *method)
3488 {
3489 guint32 method_index = mono_metadata_token_index (method->token) - 1;
3490 MonoAotModule *amodule;
3491 char *symbol;
3492 gpointer code;
3493
3494 if (method->is_inflated && !mono_method_is_generic_sharable_impl (method, FALSE)) {
3495 guint32 index = find_extra_method (method, &amodule);
3496 g_assert (index != 0xffffff);
3497
3498 symbol = g_strdup_printf ("ut_e_%d", index);
3499 } else {
3500 amodule = method->klass->image->aot_module;
3501 g_assert (amodule);
3502
3503 symbol = g_strdup_printf ("ut_%d", method_index);
3504 }
3505 code = load_function (amodule, symbol);
3506 g_free (symbol);
3507
3508 /* The caller expects an ftnptr */
3509 return mono_create_ftnptr (mono_domain_get (), code);
3510 }
3511
3512 gpointer
3513 mono_aot_get_lazy_fetch_trampoline (guint32 slot)
3514 {
3515 char *symbol;
3516 gpointer code;
3517
3518 symbol = g_strdup_printf ("rgctx_fetch_trampoline_%u", slot);
3519 code = load_function (mono_defaults.corlib->aot_module, symbol);
3520 g_free (symbol);
3521 /* The caller expects an ftnptr */
3522 return mono_create_ftnptr (mono_domain_get (), code);
3523 }
3524
3525 gpointer
3526 mono_aot_get_imt_thunk (MonoVTable *vtable, MonoDomain *domain, MonoIMTCheckItem **imt_entries, int count, gpointer fail_tramp)
3527 {
3528 guint32 got_offset;
3529 gpointer code;
3530 gpointer *buf;
3531 int i;
3532 MonoAotModule *amodule;
3533
3534 code = get_numerous_trampoline (MONO_AOT_TRAMP_IMT_THUNK, 1, &amodule, &got_offset, NULL);
3535
3536 /* Save the entries into an array */
3537 buf = mono_domain_alloc (domain, (count + 1) * 2 * sizeof (gpointer));
3538 for (i = 0; i < count; ++i) {
3539 MonoIMTCheckItem *item = imt_entries [i];
3540
3541 g_assert (item->key);
3542 /* FIXME: */
3543 g_assert (!item->has_target_code);
3544
3545 buf [(i * 2)] = item->key;
3546 buf [(i * 2) + 1] = &(vtable->vtable [item->value.vtable_slot]);
3547 }
3548 buf [(count * 2)] = NULL;
3549 buf [(count * 2) + 1] = fail_tramp;
3550
3551 amodule->got [got_offset] = buf;
3552
3553 return code;
3554 }
3555
3556 #else
3557 /* AOT disabled */
3558
3559 void
3560 mono_aot_init (void)
3561 {
3562 }
3563
3564 gpointer
3565 mono_aot_get_method (MonoDomain *domain, MonoMethod *method)
3566 {
3567 return NULL;
3568 }
3569
3570 gboolean
3571 mono_aot_is_got_entry (guint8 *code, guint8 *addr)
3572 {
3573 return FALSE;
3574 }
3575
3576 gboolean
3577 mono_aot_get_cached_class_info (MonoClass *klass, MonoCachedClassInfo *res)
3578 {
3579 return FALSE;
3580 }
3581
3582 gboolean
3583 mono_aot_get_class_from_name (MonoImage *image, const char *name_space, const char *name, MonoClass **klass)
3584 {
3585 return FALSE;
3586 }
3587
3588 MonoJitInfo *
3589 mono_aot_find_jit_info (MonoDomain *domain, MonoImage *image, gpointer addr)
3590 {
3591 return NULL;
3592 }
3593
3594 gpointer
3595 mono_aot_get_method_from_token (MonoDomain *domain, MonoImage *image, guint32 token)
3596 {
3597 return NULL;
3598 }
3599
3600 guint8*
3601 mono_aot_get_plt_entry (guint8 *code)
3602 {
3603 return NULL;
3604 }
3605
3606 gpointer
3607 mono_aot_plt_resolve (gpointer aot_module, guint32 plt_info_offset, guint8 *code)
3608 {
3609 return NULL;
3610 }
3611
3612 gpointer
3613 mono_aot_get_method_from_vt_slot (MonoDomain *domain, MonoVTable *vtable, int slot)
3614 {
3615 return NULL;
3616 }
3617
3618 guint32
3619 mono_aot_get_plt_info_offset (mgreg_t *regs, guint8 *code)
3620 {
3621 g_assert_not_reached ();
3622
3623 return 0;
3624 }
3625
3626 gpointer
3627 mono_aot_create_specific_trampoline (MonoImage *image, gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
3628 {
3629 g_assert_not_reached ();
3630 return NULL;
3631 }
3632
3633 gpointer
3634 mono_aot_get_static_rgctx_trampoline (gpointer ctx, gpointer addr)
3635 {
3636 g_assert_not_reached ();
3637 return NULL;
3638 }
3639
3640 gpointer
3641 mono_aot_get_named_code (const char *name)
3642 {
3643 g_assert_not_reached ();
3644 return NULL;
3645 }
3646
3647 gpointer
3648 mono_aot_get_unbox_trampoline (MonoMethod *method)
3649 {
3650 g_assert_not_reached ();
3651 return NULL;
3652 }
3653
3654 gpointer
3655 mono_aot_get_lazy_fetch_trampoline (guint32 slot)
3656 {
3657 g_assert_not_reached ();
3658 return NULL;
3659 }
3660
3661 gpointer
3662 mono_aot_get_imt_thunk (MonoVTable *vtable, MonoDomain *domain, MonoIMTCheckItem **imt_entries, int count, gpointer fail_tramp)
3663 {
3664 g_assert_not_reached ();
3665 return NULL;
3666 }
3667
3668 guint8*
3669 mono_aot_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
3670 {
3671 g_assert_not_reached ();
3672 return NULL;
3673 }
3674
3675 #endif
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