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Merge pull request #444 from knocte/xbuild_improvements
[mono-project.git] / mono / mini / aot-runtime.c
blob0a51626141dfc6f64b9af4413a05d1a0e7671186
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 * Copyright 2003-2011 Novell, Inc.
10 * Copyright 2011 Xamarin, Inc.
11 */
12
13 #include "config.h"
14 #include <sys/types.h>
15 #ifdef HAVE_UNISTD_H
16 #include <unistd.h>
17 #endif
18 #include <fcntl.h>
19 #include <string.h>
20 #ifdef HAVE_SYS_MMAN_H
21 #include <sys/mman.h>
22 #endif
23
24 #if HOST_WIN32
25 #include <winsock2.h>
26 #include <windows.h>
27 #endif
28
29 #ifdef HAVE_EXECINFO_H
30 #include <execinfo.h>
31 #endif
32
33 #include <errno.h>
34 #include <sys/stat.h>
35
36 #ifdef HAVE_SYS_WAIT_H
37 #include <sys/wait.h> /* for WIFEXITED, WEXITSTATUS */
38 #endif
39
40 #include <mono/metadata/tabledefs.h>
41 #include <mono/metadata/class.h>
42 #include <mono/metadata/object.h>
43 #include <mono/metadata/tokentype.h>
44 #include <mono/metadata/appdomain.h>
45 #include <mono/metadata/debug-helpers.h>
46 #include <mono/metadata/assembly.h>
47 #include <mono/metadata/metadata-internals.h>
48 #include <mono/metadata/marshal.h>
49 #include <mono/metadata/gc-internal.h>
50 #include <mono/metadata/monitor.h>
51 #include <mono/metadata/threads-types.h>
52 #include <mono/metadata/mono-endian.h>
53 #include <mono/utils/mono-logger-internal.h>
54 #include <mono/utils/mono-mmap.h>
55 #include "mono/utils/mono-compiler.h"
56 #include <mono/utils/mono-counters.h>
57
58 #include "mini.h"
59 #include "version.h"
60
61 #ifndef DISABLE_AOT
62
63 #ifdef TARGET_WIN32
64 #define SHARED_EXT ".dll"
65 #elif ((defined(__ppc__) || defined(__powerpc__) || defined(__ppc64__)) || defined(__MACH__)) && !defined(__linux__)
66 #define SHARED_EXT ".dylib"
67 #elif defined(__APPLE__) && defined(TARGET_X86) && !defined(__native_client_codegen__)
68 #define SHARED_EXT ".dylib"
69 #else
70 #define SHARED_EXT ".so"
71 #endif
72
73 #define ALIGN_PTR_TO(ptr,align) (gpointer)((((gssize)(ptr)) + (align - 1)) & (~(align - 1)))
74 #define ROUND_DOWN(VALUE,SIZE) ((VALUE) & ~((SIZE) - 1))
75
76 typedef struct MonoAotModule {
77 char *aot_name;
78 /* Pointer to the Global Offset Table */
79 gpointer *got;
80 GHashTable *name_cache;
81 GHashTable *extra_methods;
82 /* Maps methods to their code */
83 GHashTable *method_to_code;
84 /* Maps pointers into the method info to the methods themselves */
85 GHashTable *method_ref_to_method;
86 MonoAssemblyName *image_names;
87 char **image_guids;
88 MonoAssembly *assembly;
89 MonoImage **image_table;
90 guint32 image_table_len;
91 gboolean out_of_date;
92 gboolean plt_inited;
93 guint8 *mem_begin;
94 guint8 *mem_end;
95 guint8 *code;
96 guint8 *code_end;
97 guint8 *plt;
98 guint8 *plt_end;
99 guint8 *blob;
100 gint32 *code_offsets;
101 /* This contains <offset, index> pairs sorted by offset */
102 /* This is needed because LLVM emitted methods can be in any order */
103 gint32 *sorted_code_offsets;
104 gint32 sorted_code_offsets_len;
105 guint32 *method_info_offsets;
106 guint32 *got_info_offsets;
107 guint32 *ex_info_offsets;
108 guint32 *class_info_offsets;
109 guint32 *methods_loaded;
110 guint16 *class_name_table;
111 guint32 *extra_method_table;
112 guint32 *extra_method_info_offsets;
113 guint32 *unbox_trampolines;
114 guint32 *unbox_trampolines_end;
115 guint8 *unwind_info;
116 guint8 *thumb_end;
117
118 /* Points to the mono EH data created by LLVM */
119 guint8 *mono_eh_frame;
120
121 /* Points to the trampolines */
122 guint8 *trampolines [MONO_AOT_TRAMP_NUM];
123 /* The first unused trampoline of each kind */
124 guint32 trampoline_index [MONO_AOT_TRAMP_NUM];
125
126 MonoAotFileInfo info;
127
128 gpointer *globals;
129 MonoDl *sofile;
130 } MonoAotModule;
131
132 static GHashTable *aot_modules;
133 #define mono_aot_lock() EnterCriticalSection (&aot_mutex)
134 #define mono_aot_unlock() LeaveCriticalSection (&aot_mutex)
135 static CRITICAL_SECTION aot_mutex;
136
137 /*
138 * Maps assembly names to the mono_aot_module_<NAME>_info symbols in the
139 * AOT modules registered by mono_aot_register_module ().
140 */
141 static GHashTable *static_aot_modules;
142
143 /*
144 * Maps MonoJitInfo* to the aot module they belong to, this can be different
145 * from ji->method->klass->image's aot module for generic instances.
146 */
147 static GHashTable *ji_to_amodule;
148
149 /*
150 * Whenever to AOT compile loaded assemblies on demand and store them in
151 * a cache under $HOME/.mono/aot-cache.
152 */
153 static gboolean use_aot_cache = FALSE;
154
155 /*
156 * Whenever to spawn a new process to AOT a file or do it in-process. Only relevant if
157 * use_aot_cache is TRUE.
158 */
159 static gboolean spawn_compiler = TRUE;
160
161 /* For debugging */
162 static gint32 mono_last_aot_method = -1;
163
164 static gboolean make_unreadable = FALSE;
165 static guint32 name_table_accesses = 0;
166 static guint32 n_pagefaults = 0;
167
168 /* Used to speed-up find_aot_module () */
169 static gsize aot_code_low_addr = (gssize)-1;
170 static gsize aot_code_high_addr = 0;
171
172 static GHashTable *aot_jit_icall_hash;
173
174 static void
175 init_plt (MonoAotModule *info);
176
177 /*****************************************************/
178 /* AOT RUNTIME */
179 /*****************************************************/
180
181 /*
182 * load_image:
183 *
184 * Load one of the images referenced by AMODULE. Returns NULL if the image is not
185 * found, and sets the loader error if SET_ERROR is TRUE.
186 */
187 static MonoImage *
188 load_image (MonoAotModule *amodule, int index, gboolean set_error)
189 {
190 MonoAssembly *assembly;
191 MonoImageOpenStatus status;
192
193 g_assert (index < amodule->image_table_len);
194
195 if (amodule->image_table [index])
196 return amodule->image_table [index];
197 if (amodule->out_of_date)
198 return NULL;
199
200 assembly = mono_assembly_load (&amodule->image_names [index], amodule->assembly->basedir, &status);
201 if (!assembly) {
202 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);
203 amodule->out_of_date = TRUE;
204
205 if (set_error) {
206 char *full_name = mono_stringify_assembly_name (&amodule->image_names [index]);
207 mono_loader_set_error_assembly_load (full_name, FALSE);
208 g_free (full_name);
209 }
210 return NULL;
211 }
212
213 if (strcmp (assembly->image->guid, amodule->image_guids [index])) {
214 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s is unusable (GUID of dependent assembly %s doesn't match (expected '%s', got '%s').\n", amodule->aot_name, amodule->image_names [index].name, amodule->image_guids [index], assembly->image->guid);
215 amodule->out_of_date = TRUE;
216 return NULL;
217 }
218
219 amodule->image_table [index] = assembly->image;
220 return assembly->image;
221 }
222
223 static inline gint32
224 decode_value (guint8 *ptr, guint8 **rptr)
225 {
226 guint8 b = *ptr;
227 gint32 len;
228
229 if ((b & 0x80) == 0){
230 len = b;
231 ++ptr;
232 } else if ((b & 0x40) == 0){
233 len = ((b & 0x3f) << 8 | ptr [1]);
234 ptr += 2;
235 } else if (b != 0xff) {
236 len = ((b & 0x1f) << 24) |
237 (ptr [1] << 16) |
238 (ptr [2] << 8) |
239 ptr [3];
240 ptr += 4;
241 }
242 else {
243 len = (ptr [1] << 24) | (ptr [2] << 16) | (ptr [3] << 8) | ptr [4];
244 ptr += 5;
245 }
246 if (rptr)
247 *rptr = ptr;
248
249 //printf ("DECODE: %d.\n", len);
250 return len;
251 }
252
253 /*
254 * mono_aot_get_offset:
255 *
256 * Decode an offset table emitted by emit_offset_table (), returning the INDEXth
257 * entry.
258 */
259 static guint32
260 mono_aot_get_offset (guint32 *table, int index)
261 {
262 int i, group, ngroups, index_entry_size;
263 int start_offset, offset, noffsets, group_size;
264 guint8 *data_start, *p;
265 guint32 *index32 = NULL;
266 guint16 *index16 = NULL;
267
268 noffsets = table [0];
269 group_size = table [1];
270 ngroups = table [2];
271 index_entry_size = table [3];
272 group = index / group_size;
273
274 if (index_entry_size == 2) {
275 index16 = (guint16*)&table [4];
276 data_start = (guint8*)&index16 [ngroups];
277 p = data_start + index16 [group];
278 } else {
279 index32 = (guint32*)&table [4];
280 data_start = (guint8*)&index32 [ngroups];
281 p = data_start + index32 [group];
282 }
283
284 /* offset will contain the value of offsets [group * group_size] */
285 offset = start_offset = decode_value (p, &p);
286 for (i = group * group_size + 1; i <= index; ++i) {
287 offset += decode_value (p, &p);
288 }
289
290 //printf ("Offset lookup: %d -> %d, start=%d, p=%d\n", index, offset, start_offset, table [3 + group]);
291
292 return offset;
293 }
294
295 static MonoMethod*
296 decode_resolve_method_ref (MonoAotModule *module, guint8 *buf, guint8 **endbuf);
297
298 static MonoClass*
299 decode_klass_ref (MonoAotModule *module, guint8 *buf, guint8 **endbuf);
300
301 static MonoType*
302 decode_type (MonoAotModule *module, guint8 *buf, guint8 **endbuf);
303
304 static MonoGenericInst*
305 decode_generic_inst (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
306 {
307 int type_argc, i;
308 MonoType **type_argv;
309 MonoGenericInst *inst;
310 guint8 *p = buf;
311
312 type_argc = decode_value (p, &p);
313 type_argv = g_new0 (MonoType*, type_argc);
314
315 for (i = 0; i < type_argc; ++i) {
316 MonoClass *pclass = decode_klass_ref (module, p, &p);
317 if (!pclass) {
318 g_free (type_argv);
319 return NULL;
320 }
321 type_argv [i] = &pclass->byval_arg;
322 }
323
324 inst = mono_metadata_get_generic_inst (type_argc, type_argv);
325 g_free (type_argv);
326
327 *endbuf = p;
328
329 return inst;
330 }
331
332 static gboolean
333 decode_generic_context (MonoAotModule *module, MonoGenericContext *ctx, guint8 *buf, guint8 **endbuf)
334 {
335 guint8 *p = buf;
336 guint8 *p2;
337 int argc;
338
339 p2 = p;
340 argc = decode_value (p, &p);
341 if (argc) {
342 p = p2;
343 ctx->class_inst = decode_generic_inst (module, p, &p);
344 if (!ctx->class_inst)
345 return FALSE;
346 }
347 p2 = p;
348 argc = decode_value (p, &p);
349 if (argc) {
350 p = p2;
351 ctx->method_inst = decode_generic_inst (module, p, &p);
352 if (!ctx->method_inst)
353 return FALSE;
354 }
355
356 *endbuf = p;
357 return TRUE;
358 }
359
360 static MonoClass*
361 decode_klass_ref (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
362 {
363 MonoImage *image;
364 MonoClass *klass = NULL, *eklass;
365 guint32 token, rank, idx;
366 guint8 *p = buf;
367 int reftype;
368
369 reftype = decode_value (p, &p);
370 if (reftype == 0) {
371 *endbuf = p;
372 return NULL;
373 }
374
375 switch (reftype) {
376 case MONO_AOT_TYPEREF_TYPEDEF_INDEX:
377 idx = decode_value (p, &p);
378 image = load_image (module, 0, TRUE);
379 if (!image)
380 return NULL;
381 klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF + idx);
382 break;
383 case MONO_AOT_TYPEREF_TYPEDEF_INDEX_IMAGE:
384 idx = decode_value (p, &p);
385 image = load_image (module, decode_value (p, &p), TRUE);
386 if (!image)
387 return NULL;
388 klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF + idx);
389 break;
390 case MONO_AOT_TYPEREF_TYPESPEC_TOKEN:
391 token = decode_value (p, &p);
392 image = module->assembly->image;
393 if (!image)
394 return NULL;
395 klass = mono_class_get (image, token);
396 break;
397 case MONO_AOT_TYPEREF_GINST: {
398 MonoClass *gclass;
399 MonoGenericContext ctx;
400 MonoType *type;
401
402 gclass = decode_klass_ref (module, p, &p);
403 if (!gclass)
404 return NULL;
405 g_assert (gclass->generic_container);
406
407 memset (&ctx, 0, sizeof (ctx));
408 ctx.class_inst = decode_generic_inst (module, p, &p);
409 if (!ctx.class_inst)
410 return NULL;
411 type = mono_class_inflate_generic_type (&gclass->byval_arg, &ctx);
412 klass = mono_class_from_mono_type (type);
413 mono_metadata_free_type (type);
414 break;
415 }
416 case MONO_AOT_TYPEREF_VAR: {
417 MonoType *t;
418 MonoGenericContainer *container = NULL;
419 int type = decode_value (p, &p);
420 int num = decode_value (p, &p);
421 gboolean has_container = decode_value (p, &p);
422 int serial = 0;
423
424 if (has_container) {
425 gboolean is_method = decode_value (p, &p);
426
427 if (is_method) {
428 MonoMethod *method_def;
429 g_assert (type == MONO_TYPE_MVAR);
430 method_def = decode_resolve_method_ref (module, p, &p);
431 if (!method_def)
432 return NULL;
433
434 container = mono_method_get_generic_container (method_def);
435 } else {
436 MonoClass *class_def;
437 g_assert (type == MONO_TYPE_VAR);
438 class_def = decode_klass_ref (module, p, &p);
439 if (!class_def)
440 return NULL;
441
442 container = class_def->generic_container;
443 }
444 } else {
445 serial = decode_value (p, &p);
446 }
447
448 // FIXME: Memory management
449 t = g_new0 (MonoType, 1);
450 t->type = type;
451
452 if (container) {
453 t->data.generic_param = mono_generic_container_get_param (container, num);
454 g_assert (serial == 0);
455 } else {
456 /* Anonymous */
457 MonoGenericParam *par = (MonoGenericParam*)g_new0 (MonoGenericParamFull, 1);
458 par->num = num;
459 par->serial = serial;
460 // FIXME:
461 par->image = mono_defaults.corlib;
462 t->data.generic_param = par;
463 }
464
465 // FIXME: Maybe use types directly to avoid
466 // the overhead of creating MonoClass-es
467 klass = mono_class_from_mono_type (t);
468
469 g_free (t);
470 break;
471 }
472 case MONO_AOT_TYPEREF_ARRAY:
473 /* Array */
474 rank = decode_value (p, &p);
475 eklass = decode_klass_ref (module, p, &p);
476 klass = mono_array_class_get (eklass, rank);
477 break;
478 case MONO_AOT_TYPEREF_PTR: {
479 MonoType *t;
480
481 t = decode_type (module, p, &p);
482 if (!t)
483 return NULL;
484 klass = mono_class_from_mono_type (t);
485 g_free (t);
486 break;
487 }
488 case MONO_AOT_TYPEREF_BLOB_INDEX: {
489 guint32 offset = decode_value (p, &p);
490 guint8 *p2;
491
492 p2 = module->blob + offset;
493 klass = decode_klass_ref (module, p2, &p2);
494 break;
495 }
496 default:
497 g_assert_not_reached ();
498 }
499 g_assert (klass);
500 //printf ("BLA: %s\n", mono_type_full_name (&klass->byval_arg));
501 *endbuf = p;
502 return klass;
503 }
504
505 static MonoClassField*
506 decode_field_info (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
507 {
508 MonoClass *klass = decode_klass_ref (module, buf, &buf);
509 guint32 token;
510 guint8 *p = buf;
511
512 if (!klass)
513 return NULL;
514
515 token = MONO_TOKEN_FIELD_DEF + decode_value (p, &p);
516
517 *endbuf = p;
518
519 return mono_class_get_field (klass, token);
520 }
521
522 /*
523 * Parse a MonoType encoded by encode_type () in aot-compiler.c. Return malloc-ed
524 * memory.
525 */
526 static MonoType*
527 decode_type (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
528 {
529 guint8 *p = buf;
530 MonoType *t;
531
532 t = g_malloc0 (sizeof (MonoType));
533
534 while (TRUE) {
535 if (*p == MONO_TYPE_PINNED) {
536 t->pinned = TRUE;
537 ++p;
538 } else if (*p == MONO_TYPE_BYREF) {
539 t->byref = TRUE;
540 ++p;
541 } else {
542 break;
543 }
544 }
545
546 t->type = *p;
547 ++p;
548
549 switch (t->type) {
550 case MONO_TYPE_VOID:
551 case MONO_TYPE_BOOLEAN:
552 case MONO_TYPE_CHAR:
553 case MONO_TYPE_I1:
554 case MONO_TYPE_U1:
555 case MONO_TYPE_I2:
556 case MONO_TYPE_U2:
557 case MONO_TYPE_I4:
558 case MONO_TYPE_U4:
559 case MONO_TYPE_I8:
560 case MONO_TYPE_U8:
561 case MONO_TYPE_R4:
562 case MONO_TYPE_R8:
563 case MONO_TYPE_I:
564 case MONO_TYPE_U:
565 case MONO_TYPE_STRING:
566 case MONO_TYPE_OBJECT:
567 case MONO_TYPE_TYPEDBYREF:
568 break;
569 case MONO_TYPE_VALUETYPE:
570 case MONO_TYPE_CLASS:
571 t->data.klass = decode_klass_ref (module, p, &p);
572 break;
573 case MONO_TYPE_SZARRAY:
574 t->data.klass = decode_klass_ref (module, p, &p);
575
576 if (!t->data.klass)
577 return NULL;
578 break;
579 case MONO_TYPE_PTR:
580 t->data.type = decode_type (module, p, &p);
581 break;
582 case MONO_TYPE_GENERICINST: {
583 MonoClass *gclass;
584 MonoGenericContext ctx;
585 MonoType *type;
586 MonoClass *klass;
587
588 gclass = decode_klass_ref (module, p, &p);
589 if (!gclass)
590 return NULL;
591 g_assert (gclass->generic_container);
592
593 memset (&ctx, 0, sizeof (ctx));
594 ctx.class_inst = decode_generic_inst (module, p, &p);
595 if (!ctx.class_inst)
596 return NULL;
597 type = mono_class_inflate_generic_type (&gclass->byval_arg, &ctx);
598 klass = mono_class_from_mono_type (type);
599 t->data.generic_class = klass->generic_class;
600 break;
601 }
602 case MONO_TYPE_ARRAY: {
603 MonoArrayType *array;
604 int i;
605
606 // FIXME: memory management
607 array = g_new0 (MonoArrayType, 1);
608 array->eklass = decode_klass_ref (module, p, &p);
609 if (!array->eklass)
610 return NULL;
611 array->rank = decode_value (p, &p);
612 array->numsizes = decode_value (p, &p);
613
614 if (array->numsizes)
615 array->sizes = g_malloc0 (sizeof (int) * array->numsizes);
616 for (i = 0; i < array->numsizes; ++i)
617 array->sizes [i] = decode_value (p, &p);
618
619 array->numlobounds = decode_value (p, &p);
620 if (array->numlobounds)
621 array->lobounds = g_malloc0 (sizeof (int) * array->numlobounds);
622 for (i = 0; i < array->numlobounds; ++i)
623 array->lobounds [i] = decode_value (p, &p);
624 t->data.array = array;
625 break;
626 }
627 default:
628 g_assert_not_reached ();
629 }
630
631 *endbuf = p;
632
633 return t;
634 }
635
636 // FIXME: Error handling, memory management
637
638 static MonoMethodSignature*
639 decode_signature_with_target (MonoAotModule *module, MonoMethodSignature *target, guint8 *buf, guint8 **endbuf)
640 {
641 MonoMethodSignature *sig;
642 guint32 flags;
643 int i, param_count, call_conv;
644 guint8 *p = buf;
645 gboolean hasthis, explicit_this, has_gen_params;
646
647 flags = *p;
648 p ++;
649 has_gen_params = (flags & 0x10) != 0;
650 hasthis = (flags & 0x20) != 0;
651 explicit_this = (flags & 0x40) != 0;
652 call_conv = flags & 0x0F;
653
654 g_assert (!has_gen_params);
655
656 param_count = decode_value (p, &p);
657 if (target && param_count != target->param_count)
658 return NULL;
659 sig = g_malloc0 (MONO_SIZEOF_METHOD_SIGNATURE + param_count * sizeof (MonoType *));
660 sig->param_count = param_count;
661 sig->sentinelpos = -1;
662 sig->hasthis = hasthis;
663 sig->explicit_this = explicit_this;
664 sig->call_convention = call_conv;
665 sig->param_count = param_count;
666 sig->ret = decode_type (module, p, &p);
667 for (i = 0; i < param_count; ++i) {
668 if (*p == MONO_TYPE_SENTINEL) {
669 g_assert (sig->call_convention == MONO_CALL_VARARG);
670 sig->sentinelpos = i;
671 p ++;
672 }
673 sig->params [i] = decode_type (module, p, &p);
674 }
675
676 if (sig->call_convention == MONO_CALL_VARARG && sig->sentinelpos == -1)
677 sig->sentinelpos = sig->param_count;
678
679 *endbuf = p;
680
681 return sig;
682 }
683
684 static MonoMethodSignature*
685 decode_signature (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
686 {
687 return decode_signature_with_target (module, NULL, buf, endbuf);
688 }
689
690 static gboolean
691 sig_matches_target (MonoAotModule *module, MonoMethod *target, guint8 *buf, guint8 **endbuf)
692 {
693 MonoMethodSignature *sig;
694 gboolean res;
695 guint8 *p = buf;
696
697 sig = decode_signature_with_target (module, mono_method_signature (target), p, &p);
698 res = sig && mono_metadata_signature_equal (mono_method_signature (target), sig);
699 g_free (sig);
700 *endbuf = p;
701 return res;
702 }
703
704 /* Stores information returned by decode_method_ref () */
705 typedef struct {
706 MonoImage *image;
707 guint32 token;
708 MonoMethod *method;
709 gboolean no_aot_trampoline;
710 } MethodRef;
711
712 /*
713 * decode_method_ref_with_target:
714 *
715 * Decode a method reference, storing the image/token into a MethodRef structure.
716 * This avoids loading metadata for the method if the caller does not need it. If the method has
717 * no token, then it is loaded from metadata and ref->method is set to the method instance.
718 * If TARGET is non-NULL, abort decoding if it can be determined that the decoded method
719 * couldn't resolve to TARGET, and return FALSE.
720 * There are some kinds of method references which only support a non-null TARGET.
721 * This means that its not possible to decode this into a method, only to check
722 * that the method reference matches a given method. This is normally not a problem
723 * as these wrappers only occur in the extra_methods table, where we already have
724 * a method we want to lookup.
725 */
726 static gboolean
727 decode_method_ref_with_target (MonoAotModule *module, MethodRef *ref, MonoMethod *target, guint8 *buf, guint8 **endbuf)
728 {
729 guint32 image_index, value;
730 MonoImage *image = NULL;
731 guint8 *p = buf;
732
733 memset (ref, 0, sizeof (MethodRef));
734
735 value = decode_value (p, &p);
736 image_index = value >> 24;
737
738 if (image_index == MONO_AOT_METHODREF_NO_AOT_TRAMPOLINE) {
739 ref->no_aot_trampoline = TRUE;
740 value = decode_value (p, &p);
741 image_index = value >> 24;
742 }
743
744 if (image_index < MONO_AOT_METHODREF_MIN || image_index == MONO_AOT_METHODREF_METHODSPEC || image_index == MONO_AOT_METHODREF_GINST) {
745 if (target && target->wrapper_type)
746 return FALSE;
747 }
748
749 if (image_index == MONO_AOT_METHODREF_WRAPPER) {
750 guint32 wrapper_type;
751
752 wrapper_type = decode_value (p, &p);
753
754 if (target && target->wrapper_type != wrapper_type)
755 return FALSE;
756
757 /* Doesn't matter */
758 image = mono_defaults.corlib;
759
760 switch (wrapper_type) {
761 case MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK: {
762 MonoMethod *m = decode_resolve_method_ref (module, p, &p);
763
764 if (!m)
765 return FALSE;
766 mono_class_init (m->klass);
767 ref->method = mono_marshal_get_remoting_invoke_with_check (m);
768 break;
769 }
770 case MONO_WRAPPER_PROXY_ISINST: {
771 MonoClass *klass = decode_klass_ref (module, p, &p);
772 if (!klass)
773 return FALSE;
774 ref->method = mono_marshal_get_proxy_cancast (klass);
775 break;
776 }
777 case MONO_WRAPPER_LDFLD:
778 case MONO_WRAPPER_LDFLDA:
779 case MONO_WRAPPER_STFLD:
780 case MONO_WRAPPER_ISINST: {
781 MonoClass *klass = decode_klass_ref (module, p, &p);
782 if (!klass)
783 return FALSE;
784 if (wrapper_type == MONO_WRAPPER_LDFLD)
785 ref->method = mono_marshal_get_ldfld_wrapper (&klass->byval_arg);
786 else if (wrapper_type == MONO_WRAPPER_LDFLDA)
787 ref->method = mono_marshal_get_ldflda_wrapper (&klass->byval_arg);
788 else if (wrapper_type == MONO_WRAPPER_STFLD)
789 ref->method = mono_marshal_get_stfld_wrapper (&klass->byval_arg);
790 else if (wrapper_type == MONO_WRAPPER_ISINST)
791 ref->method = mono_marshal_get_isinst (klass);
792 else
793 g_assert_not_reached ();
794 break;
795 }
796 case MONO_WRAPPER_LDFLD_REMOTE:
797 ref->method = mono_marshal_get_ldfld_remote_wrapper (NULL);
798 break;
799 case MONO_WRAPPER_STFLD_REMOTE:
800 ref->method = mono_marshal_get_stfld_remote_wrapper (NULL);
801 break;
802 case MONO_WRAPPER_ALLOC: {
803 int atype = decode_value (p, &p);
804
805 ref->method = mono_gc_get_managed_allocator_by_type (atype);
806 g_assert (ref->method);
807 break;
808 }
809 case MONO_WRAPPER_WRITE_BARRIER:
810 ref->method = mono_gc_get_write_barrier ();
811 break;
812 case MONO_WRAPPER_STELEMREF: {
813 int subtype = decode_value (p, &p);
814
815 if (subtype == WRAPPER_SUBTYPE_NONE) {
816 ref->method = mono_marshal_get_stelemref ();
817 } else if (subtype == WRAPPER_SUBTYPE_VIRTUAL_STELEMREF) {
818 int kind;
819 WrapperInfo *info;
820
821 kind = decode_value (p, &p);
822
823 /* Can't decode this */
824 if (!target)
825 return FALSE;
826 if (target->wrapper_type == MONO_WRAPPER_STELEMREF) {
827 info = mono_marshal_get_wrapper_info (target);
828
829 g_assert (info);
830 if (info->subtype == subtype && info->d.virtual_stelemref.kind == kind)
831 ref->method = target;
832 else
833 return FALSE;
834 } else {
835 return FALSE;
836 }
837 } else {
838 g_assert_not_reached ();
839 }
840 break;
841 }
842 case MONO_WRAPPER_SYNCHRONIZED: {
843 MonoMethod *m = decode_resolve_method_ref (module, p, &p);
844
845 if (!m)
846 return FALSE;
847 ref->method = mono_marshal_get_synchronized_wrapper (m);
848 break;
849 }
850 case MONO_WRAPPER_UNKNOWN: {
851 MonoMethodDesc *desc;
852 MonoMethod *orig_method;
853 int subtype = decode_value (p, &p);
854
855 if (subtype == WRAPPER_SUBTYPE_PTR_TO_STRUCTURE || subtype == WRAPPER_SUBTYPE_STRUCTURE_TO_PTR) {
856 MonoClass *klass = decode_klass_ref (module, p, &p);
857
858 if (!klass)
859 return FALSE;
860
861 if (!target)
862 return FALSE;
863 if (klass != target->klass)
864 return FALSE;
865
866 if (subtype == WRAPPER_SUBTYPE_PTR_TO_STRUCTURE) {
867 if (strcmp (target->name, "PtrToStructure"))
868 return FALSE;
869 ref->method = mono_marshal_get_ptr_to_struct (klass);
870 } else {
871 if (strcmp (target->name, "StructureToPtr"))
872 return FALSE;
873 ref->method = mono_marshal_get_struct_to_ptr (klass);
874 }
875 } else if (subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
876 MonoMethod *m = decode_resolve_method_ref (module, p, &p);
877
878 if (!m)
879 return FALSE;
880 ref->method = mono_marshal_get_synchronized_inner_wrapper (m);
881 } else {
882 if (subtype == WRAPPER_SUBTYPE_FAST_MONITOR_ENTER)
883 desc = mono_method_desc_new ("Monitor:Enter", FALSE);
884 else if (subtype == WRAPPER_SUBTYPE_FAST_MONITOR_EXIT)
885 desc = mono_method_desc_new ("Monitor:Exit", FALSE);
886 else if (subtype == WRAPPER_SUBTYPE_FAST_MONITOR_ENTER_V4)
887 desc = mono_method_desc_new ("Monitor:Enter(object,bool&)", FALSE);
888 else
889 g_assert_not_reached ();
890 orig_method = mono_method_desc_search_in_class (desc, mono_defaults.monitor_class);
891 g_assert (orig_method);
892 mono_method_desc_free (desc);
893 ref->method = mono_monitor_get_fast_path (orig_method);
894 }
895 break;
896 }
897 case MONO_WRAPPER_MANAGED_TO_MANAGED: {
898 int subtype = decode_value (p, &p);
899
900 if (subtype == WRAPPER_SUBTYPE_ELEMENT_ADDR) {
901 int rank = decode_value (p, &p);
902 int elem_size = decode_value (p, &p);
903
904 ref->method = mono_marshal_get_array_address (rank, elem_size);
905 } else if (subtype == WRAPPER_SUBTYPE_STRING_CTOR) {
906 WrapperInfo *info;
907 MonoMethod *m;
908
909 m = decode_resolve_method_ref (module, p, &p);
910 if (!m)
911 return FALSE;
912
913 if (!target)
914 return FALSE;
915 g_assert (target->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED);
916
917 info = mono_marshal_get_wrapper_info (target);
918 if (info && info->subtype == subtype && info->d.string_ctor.method == m)
919 ref->method = target;
920 else
921 return FALSE;
922 }
923 break;
924 }
925 case MONO_WRAPPER_MANAGED_TO_NATIVE: {
926 MonoMethod *m;
927 int subtype = decode_value (p, &p);
928 char *name;
929
930 if (subtype == WRAPPER_SUBTYPE_ICALL_WRAPPER) {
931 if (!target)
932 return FALSE;
933
934 name = (char*)p;
935 if (strcmp (target->name, name) != 0)
936 return FALSE;
937 ref->method = target;
938 } else {
939 m = decode_resolve_method_ref (module, p, &p);
940
941 if (!m)
942 return FALSE;
943
944 /* This should only happen when looking for an extra method */
945 if (!target)
946 return FALSE;
947 if (mono_marshal_method_from_wrapper (target) == m)
948 ref->method = target;
949 else
950 return FALSE;
951 }
952 break;
953 }
954 case MONO_WRAPPER_CASTCLASS: {
955 int subtype = decode_value (p, &p);
956
957 if (subtype == WRAPPER_SUBTYPE_CASTCLASS_WITH_CACHE)
958 ref->method = mono_marshal_get_castclass_with_cache ();
959 else if (subtype == WRAPPER_SUBTYPE_ISINST_WITH_CACHE)
960 ref->method = mono_marshal_get_isinst_with_cache ();
961 else
962 g_assert_not_reached ();
963 break;
964 }
965 case MONO_WRAPPER_RUNTIME_INVOKE: {
966 int subtype = decode_value (p, &p);
967
968 if (!target)
969 return FALSE;
970
971 if (subtype == WRAPPER_SUBTYPE_RUNTIME_INVOKE_DYNAMIC) {
972 if (strcmp (target->name, "runtime_invoke_dynamic") != 0)
973 return FALSE;
974 ref->method = target;
975 } else if (subtype == WRAPPER_SUBTYPE_RUNTIME_INVOKE_DIRECT) {
976 /* Direct wrapper */
977 MonoMethod *m = decode_resolve_method_ref (module, p, &p);
978
979 if (!m)
980 return FALSE;
981 ref->method = mono_marshal_get_runtime_invoke (m, FALSE);
982 } else if (subtype == WRAPPER_SUBTYPE_RUNTIME_INVOKE_VIRTUAL) {
983 /* Virtual direct wrapper */
984 MonoMethod *m = decode_resolve_method_ref (module, p, &p);
985
986 if (!m)
987 return FALSE;
988 ref->method = mono_marshal_get_runtime_invoke (m, TRUE);
989 } else {
990 if (sig_matches_target (module, target, p, &p))
991 ref->method = target;
992 else
993 return FALSE;
994 }
995 break;
996 }
997 case MONO_WRAPPER_DELEGATE_INVOKE:
998 case MONO_WRAPPER_DELEGATE_BEGIN_INVOKE:
999 case MONO_WRAPPER_DELEGATE_END_INVOKE: {
1000 /*
1001 * These wrappers are associated with a signature, not with a method.
1002 * Since we can't decode them into methods, they need a target method.
1003 */
1004 if (!target)
1005 return FALSE;
1006
1007 if (sig_matches_target (module, target, p, &p))
1008 ref->method = target;
1009 else
1010 return FALSE;
1011 break;
1012 }
1013 case MONO_WRAPPER_NATIVE_TO_MANAGED: {
1014 MonoMethod *m;
1015 MonoClass *klass;
1016
1017 m = decode_resolve_method_ref (module, p, &p);
1018 if (!m)
1019 return FALSE;
1020 klass = decode_klass_ref (module, p, &p);
1021 if (!klass)
1022 return FALSE;
1023 ref->method = mono_marshal_get_managed_wrapper (m, klass, 0);
1024 break;
1025 }
1026 default:
1027 g_assert_not_reached ();
1028 }
1029 } else if (image_index == MONO_AOT_METHODREF_METHODSPEC) {
1030 image_index = decode_value (p, &p);
1031 ref->token = decode_value (p, &p);
1032
1033 image = load_image (module, image_index, TRUE);
1034 if (!image)
1035 return FALSE;
1036 } else if (image_index == MONO_AOT_METHODREF_GINST) {
1037 MonoClass *klass;
1038 MonoGenericContext ctx;
1039
1040 /*
1041 * These methods do not have a token which resolves them, so we
1042 * resolve them immediately.
1043 */
1044 klass = decode_klass_ref (module, p, &p);
1045 if (!klass)
1046 return FALSE;
1047
1048 if (target && target->klass != klass)
1049 return FALSE;
1050
1051 image_index = decode_value (p, &p);
1052 ref->token = decode_value (p, &p);
1053
1054 image = load_image (module, image_index, TRUE);
1055 if (!image)
1056 return FALSE;
1057
1058 ref->method = mono_get_method_full (image, ref->token, NULL, NULL);
1059 if (!ref->method)
1060 return FALSE;
1061
1062 memset (&ctx, 0, sizeof (ctx));
1063
1064 if (FALSE && klass->generic_class) {
1065 ctx.class_inst = klass->generic_class->context.class_inst;
1066 ctx.method_inst = NULL;
1067
1068 ref->method = mono_class_inflate_generic_method_full (ref->method, klass, &ctx);
1069 }
1070
1071 memset (&ctx, 0, sizeof (ctx));
1072
1073 if (!decode_generic_context (module, &ctx, p, &p))
1074 return FALSE;
1075
1076 ref->method = mono_class_inflate_generic_method_full (ref->method, klass, &ctx);
1077 } else if (image_index == MONO_AOT_METHODREF_ARRAY) {
1078 MonoClass *klass;
1079 int method_type;
1080
1081 klass = decode_klass_ref (module, p, &p);
1082 if (!klass)
1083 return FALSE;
1084 method_type = decode_value (p, &p);
1085 switch (method_type) {
1086 case 0:
1087 ref->method = mono_class_get_method_from_name (klass, ".ctor", klass->rank);
1088 break;
1089 case 1:
1090 ref->method = mono_class_get_method_from_name (klass, ".ctor", klass->rank * 2);
1091 break;
1092 case 2:
1093 ref->method = mono_class_get_method_from_name (klass, "Get", -1);
1094 break;
1095 case 3:
1096 ref->method = mono_class_get_method_from_name (klass, "Address", -1);
1097 break;
1098 case 4:
1099 ref->method = mono_class_get_method_from_name (klass, "Set", -1);
1100 break;
1101 default:
1102 g_assert_not_reached ();
1103 }
1104 } else {
1105 g_assert (image_index < MONO_AOT_METHODREF_MIN);
1106 ref->token = MONO_TOKEN_METHOD_DEF | (value & 0xffffff);
1107
1108 image = load_image (module, image_index, TRUE);
1109 if (!image)
1110 return FALSE;
1111 }
1112
1113 *endbuf = p;
1114
1115 ref->image = image;
1116
1117 return TRUE;
1118 }
1119
1120 static gboolean
1121 decode_method_ref (MonoAotModule *module, MethodRef *ref, guint8 *buf, guint8 **endbuf)
1122 {
1123 return decode_method_ref_with_target (module, ref, NULL, buf, endbuf);
1124 }
1125
1126 /*
1127 * decode_resolve_method_ref_with_target:
1128 *
1129 * Similar to decode_method_ref, but resolve and return the method itself.
1130 */
1131 static MonoMethod*
1132 decode_resolve_method_ref_with_target (MonoAotModule *module, MonoMethod *target, guint8 *buf, guint8 **endbuf)
1133 {
1134 MethodRef ref;
1135 gboolean res;
1136
1137 res = decode_method_ref_with_target (module, &ref, target, buf, endbuf);
1138 if (!res)
1139 return NULL;
1140 if (ref.method)
1141 return ref.method;
1142 if (!ref.image)
1143 return NULL;
1144 return mono_get_method (ref.image, ref.token, NULL);
1145 }
1146
1147 static MonoMethod*
1148 decode_resolve_method_ref (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
1149 {
1150 return decode_resolve_method_ref_with_target (module, NULL, buf, endbuf);
1151 }
1152
1153 static void
1154 create_cache_structure (void)
1155 {
1156 const char *home;
1157 char *tmp;
1158 int err;
1159
1160 home = g_get_home_dir ();
1161 if (!home)
1162 return;
1163
1164 tmp = g_build_filename (home, ".mono", NULL);
1165 if (!g_file_test (tmp, G_FILE_TEST_IS_DIR)) {
1166 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT creating directory %s", tmp);
1167 #ifdef HOST_WIN32
1168 err = mkdir (tmp);
1169 #else
1170 err = mkdir (tmp, 0777);
1171 #endif
1172 if (err) {
1173 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT failed: %s", g_strerror (errno));
1174 g_free (tmp);
1175 return;
1176 }
1177 }
1178 g_free (tmp);
1179 tmp = g_build_filename (home, ".mono", "aot-cache", NULL);
1180 if (!g_file_test (tmp, G_FILE_TEST_IS_DIR)) {
1181 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT creating directory %s", tmp);
1182 #ifdef HOST_WIN32
1183 err = mkdir (tmp);
1184 #else
1185 err = mkdir (tmp, 0777);
1186 #endif
1187 if (err) {
1188 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT failed: %s", g_strerror (errno));
1189 g_free (tmp);
1190 return;
1191 }
1192 }
1193 g_free (tmp);
1194 }
1195
1196 /*
1197 * load_aot_module_from_cache:
1198 *
1199 * Experimental code to AOT compile loaded assemblies on demand.
1200 *
1201 * FIXME:
1202 * - Add environment variable MONO_AOT_CACHE_OPTIONS
1203 * - Add options for controlling the cache size
1204 * - Handle full cache by deleting old assemblies lru style
1205 * - Add options for excluding assemblies during development
1206 * - Maybe add a threshold after an assembly is AOT compiled
1207 * - invoking a new mono process is a security risk
1208 * - recompile the AOT module if one of its dependencies changes
1209 */
1210 static MonoDl*
1211 load_aot_module_from_cache (MonoAssembly *assembly, char **aot_name)
1212 {
1213 char *fname, *cmd, *tmp2, *aot_options;
1214 const char *home;
1215 MonoDl *module;
1216 gboolean res;
1217 gchar *out, *err;
1218 gint exit_status;
1219
1220 *aot_name = NULL;
1221
1222 if (assembly->image->dynamic)
1223 return NULL;
1224
1225 create_cache_structure ();
1226
1227 home = g_get_home_dir ();
1228
1229 tmp2 = g_strdup_printf ("%s-%s%s", assembly->image->assembly_name, assembly->image->guid, SHARED_EXT);
1230 fname = g_build_filename (home, ".mono", "aot-cache", tmp2, NULL);
1231 *aot_name = fname;
1232 g_free (tmp2);
1233
1234 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT trying to load from cache: '%s'.", fname);
1235 module = mono_dl_open (fname, MONO_DL_LAZY, NULL);
1236
1237 if (!module) {
1238 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT not found.");
1239
1240 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT precompiling assembly '%s'... ", assembly->image->name);
1241
1242 aot_options = g_strdup_printf ("outfile=%s", fname);
1243
1244 if (spawn_compiler) {
1245 /* FIXME: security */
1246 /* FIXME: Has to pass the assembly loading path to the child process */
1247 cmd = g_strdup_printf ("mono -O=all --aot=%s %s", aot_options, assembly->image->name);
1248
1249 res = g_spawn_command_line_sync (cmd, &out, &err, &exit_status, NULL);
1250
1251 #if !defined(HOST_WIN32) && !defined(__ppc__) && !defined(__ppc64__) && !defined(__powerpc__)
1252 if (res) {
1253 if (!WIFEXITED (exit_status) && (WEXITSTATUS (exit_status) == 0))
1254 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT failed: %s.", err);
1255 else
1256 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT succeeded.");
1257 g_free (out);
1258 g_free (err);
1259 }
1260 #endif
1261 g_free (cmd);
1262 } else {
1263 res = mono_compile_assembly (assembly, mono_parse_default_optimizations (NULL), aot_options);
1264 if (!res) {
1265 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT failed.");
1266 } else {
1267 mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT succeeded.");
1268 }
1269 }
1270
1271 module = mono_dl_open (fname, MONO_DL_LAZY, NULL);
1272
1273 g_free (aot_options);
1274 }
1275
1276 return module;
1277 }
1278
1279 static void
1280 find_symbol (MonoDl *module, gpointer *globals, const char *name, gpointer *value)
1281 {
1282 if (globals) {
1283 int global_index;
1284 guint16 *table, *entry;
1285 guint16 table_size;
1286 guint32 hash;
1287
1288 /* The first entry points to the hash */
1289 table = globals [0];
1290 globals ++;
1291
1292 table_size = table [0];
1293 table ++;
1294
1295 hash = mono_metadata_str_hash (name) % table_size;
1296
1297 entry = &table [hash * 2];
1298
1299 /* Search the hash for the index into the globals table */
1300 global_index = -1;
1301 while (entry [0] != 0) {
1302 guint32 index = entry [0] - 1;
1303 guint32 next = entry [1];
1304
1305 //printf ("X: %s %s\n", (char*)globals [index * 2], name);
1306
1307 if (!strcmp (globals [index * 2], name)) {
1308 global_index = index;
1309 break;
1310 }
1311
1312 if (next != 0) {
1313 entry = &table [next * 2];
1314 } else {
1315 break;
1316 }
1317 }
1318
1319 if (global_index != -1)
1320 *value = globals [global_index * 2 + 1];
1321 else
1322 *value = NULL;
1323 } else {
1324 char *err = mono_dl_symbol (module, name, value);
1325
1326 if (err)
1327 g_free (err);
1328 }
1329 }
1330
1331 static gboolean
1332 check_usable (MonoAssembly *assembly, MonoAotFileInfo *info, char **out_msg)
1333 {
1334 char *build_info;
1335 char *msg = NULL;
1336 gboolean usable = TRUE;
1337 gboolean full_aot;
1338 guint8 *blob;
1339 guint32 excluded_cpu_optimizations;
1340
1341 if (strcmp (assembly->image->guid, info->assembly_guid)) {
1342 msg = g_strdup_printf ("doesn't match assembly");
1343 usable = FALSE;
1344 }
1345
1346 build_info = mono_get_runtime_build_info ();
1347 if (strlen (info->runtime_version) > 0 && strcmp (info->runtime_version, build_info)) {
1348 msg = g_strdup_printf ("compiled against runtime version '%s' while this runtime has version '%s'", info->runtime_version, build_info);
1349 usable = FALSE;
1350 }
1351 g_free (build_info);
1352
1353 full_aot = info->flags & MONO_AOT_FILE_FLAG_FULL_AOT;
1354
1355 if (mono_aot_only && !full_aot) {
1356 msg = g_strdup_printf ("not compiled with --aot=full");
1357 usable = FALSE;
1358 }
1359 if (!mono_aot_only && full_aot) {
1360 msg = g_strdup_printf ("compiled with --aot=full");
1361 usable = FALSE;
1362 }
1363 #ifdef TARGET_ARM
1364 /* mono_arch_find_imt_method () requires this */
1365 if ((info->flags & MONO_AOT_FILE_FLAG_WITH_LLVM) && !mono_use_llvm) {
1366 msg = g_strdup_printf ("compiled against LLVM");
1367 usable = FALSE;
1368 }
1369 if (!(info->flags & MONO_AOT_FILE_FLAG_WITH_LLVM) && mono_use_llvm) {
1370 msg = g_strdup_printf ("not compiled against LLVM");
1371 usable = FALSE;
1372 }
1373 #endif
1374 if (mini_get_debug_options ()->mdb_optimizations && !(info->flags & MONO_AOT_FILE_FLAG_DEBUG) && !full_aot) {
1375 msg = g_strdup_printf ("not compiled for debugging");
1376 usable = FALSE;
1377 }
1378
1379 mono_arch_cpu_optimizations (&excluded_cpu_optimizations);
1380 if (info->opts & excluded_cpu_optimizations) {
1381 msg = g_strdup_printf ("compiled with unsupported CPU optimizations");
1382 usable = FALSE;
1383 }
1384
1385 if (!mono_aot_only && (info->simd_opts & ~mono_arch_cpu_enumerate_simd_versions ())) {
1386 msg = g_strdup_printf ("compiled with unsupported SIMD extensions");
1387 usable = FALSE;
1388 }
1389
1390 blob = info->blob;
1391
1392 if (info->gc_name_index != -1) {
1393 char *gc_name = (char*)&blob [info->gc_name_index];
1394 const char *current_gc_name = mono_gc_get_gc_name ();
1395
1396 if (strcmp (current_gc_name, gc_name) != 0) {
1397 msg = g_strdup_printf ("compiled against GC %s, while the current runtime uses GC %s.\n", gc_name, current_gc_name);
1398 usable = FALSE;
1399 }
1400 }
1401
1402 *out_msg = msg;
1403 return usable;
1404 }
1405
1406 static void
1407 load_aot_module (MonoAssembly *assembly, gpointer user_data)
1408 {
1409 char *aot_name;
1410 MonoAotModule *amodule;
1411 MonoDl *sofile;
1412 gboolean usable = TRUE;
1413 char *version_symbol = NULL;
1414 char *msg = NULL;
1415 gpointer *globals = NULL;
1416 MonoAotFileInfo *info = NULL;
1417 int i, version;
1418 guint8 *blob;
1419 gboolean do_load_image = TRUE;
1420
1421 if (mono_compile_aot)
1422 return;
1423
1424 if (assembly->image->aot_module)
1425 /*
1426 * Already loaded. This can happen because the assembly loading code might invoke
1427 * the assembly load hooks multiple times for the same assembly.
1428 */
1429 return;
1430
1431 if (assembly->image->dynamic)
1432 return;
1433
1434 if (mono_security_get_mode () == MONO_SECURITY_MODE_CAS)
1435 return;
1436
1437 mono_aot_lock ();
1438 if (static_aot_modules)
1439 info = g_hash_table_lookup (static_aot_modules, assembly->aname.name);
1440 else
1441 info = NULL;
1442 mono_aot_unlock ();
1443
1444 if (info) {
1445 /* Statically linked AOT module */
1446 sofile = NULL;
1447 aot_name = g_strdup_printf ("%s", assembly->aname.name);
1448 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "Found statically linked AOT module '%s'.\n", aot_name);
1449 globals = info->globals;
1450 } else {
1451 if (use_aot_cache)
1452 sofile = load_aot_module_from_cache (assembly, &aot_name);
1453 else {
1454 char *err;
1455 aot_name = g_strdup_printf ("%s%s", assembly->image->name, SHARED_EXT);
1456
1457 sofile = mono_dl_open (aot_name, MONO_DL_LAZY, &err);
1458
1459 if (!sofile) {
1460 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT failed to load AOT module %s: %s\n", aot_name, err);
1461 g_free (err);
1462 }
1463 }
1464 }
1465
1466 if (!sofile && !globals) {
1467 if (mono_aot_only && assembly->image->tables [MONO_TABLE_METHOD].rows) {
1468 fprintf (stderr, "Failed to load AOT module '%s' in aot-only mode.\n", aot_name);
1469 exit (1);
1470 }
1471 g_free (aot_name);
1472 return;
1473 }
1474
1475 if (!info) {
1476 find_symbol (sofile, globals, "mono_aot_version", (gpointer *) &version_symbol);
1477 find_symbol (sofile, globals, "mono_aot_file_info", (gpointer*)&info);
1478 }
1479
1480 if (version_symbol) {
1481 /* Old file format */
1482 version = atoi (version_symbol);
1483 } else {
1484 g_assert (info);
1485 version = info->version;
1486 }
1487
1488 if (version != MONO_AOT_FILE_VERSION) {
1489 msg = g_strdup_printf ("wrong file format version (expected %d got %d)", MONO_AOT_FILE_VERSION, version);
1490 usable = FALSE;
1491 } else {
1492 usable = check_usable (assembly, info, &msg);
1493 }
1494
1495 if (!usable) {
1496 if (mono_aot_only) {
1497 fprintf (stderr, "Failed to load AOT module '%s' while running in aot-only mode: %s.\n", aot_name, msg);
1498 exit (1);
1499 } else {
1500 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT module %s is unusable: %s.\n", aot_name, msg);
1501 }
1502 g_free (msg);
1503 g_free (aot_name);
1504 if (sofile)
1505 mono_dl_close (sofile);
1506 assembly->image->aot_module = NULL;
1507 return;
1508 }
1509
1510 /* Sanity check */
1511 g_assert (info->double_align == __alignof__ (double));
1512 g_assert (info->long_align == __alignof__ (gint64));
1513
1514 blob = info->blob;
1515
1516 amodule = g_new0 (MonoAotModule, 1);
1517 amodule->aot_name = aot_name;
1518 amodule->assembly = assembly;
1519
1520 memcpy (&amodule->info, info, sizeof (*info));
1521
1522 amodule->got = amodule->info.got;
1523 amodule->got [0] = assembly->image;
1524 amodule->globals = globals;
1525 amodule->sofile = sofile;
1526 amodule->method_to_code = g_hash_table_new (mono_aligned_addr_hash, NULL);
1527 amodule->blob = blob;
1528
1529 /* Read image table */
1530 {
1531 guint32 table_len, i;
1532 char *table = NULL;
1533
1534 table = info->image_table;
1535 g_assert (table);
1536
1537 table_len = *(guint32*)table;
1538 table += sizeof (guint32);
1539 amodule->image_table = g_new0 (MonoImage*, table_len);
1540 amodule->image_names = g_new0 (MonoAssemblyName, table_len);
1541 amodule->image_guids = g_new0 (char*, table_len);
1542 amodule->image_table_len = table_len;
1543 for (i = 0; i < table_len; ++i) {
1544 MonoAssemblyName *aname = &(amodule->image_names [i]);
1545
1546 aname->name = g_strdup (table);
1547 table += strlen (table) + 1;
1548 amodule->image_guids [i] = g_strdup (table);
1549 table += strlen (table) + 1;
1550 if (table [0] != 0)
1551 aname->culture = g_strdup (table);
1552 table += strlen (table) + 1;
1553 memcpy (aname->public_key_token, table, strlen (table) + 1);
1554 table += strlen (table) + 1;
1555
1556 table = ALIGN_PTR_TO (table, 8);
1557 aname->flags = *(guint32*)table;
1558 table += 4;
1559 aname->major = *(guint32*)table;
1560 table += 4;
1561 aname->minor = *(guint32*)table;
1562 table += 4;
1563 aname->build = *(guint32*)table;
1564 table += 4;
1565 aname->revision = *(guint32*)table;
1566 table += 4;
1567 }
1568 }
1569
1570 amodule->code_offsets = info->code_offsets;
1571 amodule->code = info->methods;
1572 #ifdef TARGET_ARM
1573 /* Mask out thumb interop bit */
1574 amodule->code = (void*)((mgreg_t)amodule->code & ~1);
1575 #endif
1576 amodule->code_end = info->methods_end;
1577 amodule->method_info_offsets = info->method_info_offsets;
1578 amodule->ex_info_offsets = info->ex_info_offsets;
1579 amodule->class_info_offsets = info->class_info_offsets;
1580 amodule->class_name_table = info->class_name_table;
1581 amodule->extra_method_table = info->extra_method_table;
1582 amodule->extra_method_info_offsets = info->extra_method_info_offsets;
1583 amodule->unbox_trampolines = info->unbox_trampolines;
1584 amodule->unbox_trampolines_end = info->unbox_trampolines_end;
1585 amodule->got_info_offsets = info->got_info_offsets;
1586 amodule->unwind_info = info->unwind_info;
1587 amodule->mem_end = info->mem_end;
1588 amodule->mem_begin = amodule->code;
1589 amodule->plt = info->plt;
1590 amodule->plt_end = info->plt_end;
1591 amodule->mono_eh_frame = info->mono_eh_frame;
1592 amodule->trampolines [MONO_AOT_TRAMP_SPECIFIC] = info->specific_trampolines;
1593 amodule->trampolines [MONO_AOT_TRAMP_STATIC_RGCTX] = info->static_rgctx_trampolines;
1594 amodule->trampolines [MONO_AOT_TRAMP_IMT_THUNK] = info->imt_thunks;
1595 amodule->thumb_end = info->thumb_end;
1596
1597 if (make_unreadable) {
1598 #ifndef TARGET_WIN32
1599 guint8 *addr;
1600 guint8 *page_start, *page_end;
1601 int err, len;
1602
1603 addr = amodule->mem_begin;
1604 len = amodule->mem_end - amodule->mem_begin;
1605
1606 /* Round down in both directions to avoid modifying data which is not ours */
1607 page_start = (guint8 *) (((gssize) (addr)) & ~ (mono_pagesize () - 1)) + mono_pagesize ();
1608 page_end = (guint8 *) (((gssize) (addr + len)) & ~ (mono_pagesize () - 1));
1609 if (page_end > page_start) {
1610 err = mono_mprotect (page_start, (page_end - page_start), MONO_MMAP_NONE);
1611 g_assert (err == 0);
1612 }
1613 #endif
1614 }
1615
1616 mono_aot_lock ();
1617
1618 aot_code_low_addr = MIN (aot_code_low_addr, (gsize)amodule->code);
1619 aot_code_high_addr = MAX (aot_code_high_addr, (gsize)amodule->code_end);
1620
1621 g_hash_table_insert (aot_modules, assembly, amodule);
1622 mono_aot_unlock ();
1623
1624 mono_jit_info_add_aot_module (assembly->image, amodule->code, amodule->code_end);
1625
1626 assembly->image->aot_module = amodule;
1627
1628 if (mono_aot_only) {
1629 if (mono_defaults.corlib) {
1630 /* The second got slot contains the mscorlib got addr */
1631 MonoAotModule *mscorlib_amodule = mono_defaults.corlib->aot_module;
1632
1633 amodule->got [1] = mscorlib_amodule->got;
1634 } else {
1635 amodule->got [1] = amodule->got;
1636 }
1637 }
1638
1639 if (mono_gc_is_moving ()) {
1640 MonoJumpInfo ji;
1641
1642 memset (&ji, 0, sizeof (ji));
1643 ji.type = MONO_PATCH_INFO_GC_CARD_TABLE_ADDR;
1644
1645 amodule->got [2] = mono_resolve_patch_target (NULL, mono_get_root_domain (), NULL, &ji, FALSE);
1646 }
1647
1648 /*
1649 * Since we store methoddef and classdef tokens when referring to methods/classes in
1650 * referenced assemblies, we depend on the exact versions of the referenced assemblies.
1651 * MS calls this 'hard binding'. This means we have to load all referenced assemblies
1652 * non-lazily, since we can't handle out-of-date errors later.
1653 * The cached class info also depends on the exact assemblies.
1654 */
1655 #if defined(__native_client__)
1656 /* TODO: Don't 'load_image' on mscorlib due to a */
1657 /* recursive loading problem. This should be */
1658 /* removed if mscorlib is loaded from disk. */
1659 if (strncmp(assembly->aname.name, "mscorlib", 8)) {
1660 do_load_image = TRUE;
1661 } else {
1662 do_load_image = FALSE;
1663 }
1664 #endif
1665 if (do_load_image) {
1666 for (i = 0; i < amodule->image_table_len; ++i)
1667 load_image (amodule, i, FALSE);
1668 }
1669
1670 if (amodule->out_of_date) {
1671 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);
1672 if (mono_aot_only) {
1673 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);
1674 exit (1);
1675 }
1676 }
1677 else
1678 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT loaded AOT Module for %s.\n", assembly->image->name);
1679 }
1680
1681 /*
1682 * mono_aot_register_globals:
1683 *
1684 * This is called by the ctor function in AOT images compiled with the
1685 * 'no-dlsym' option.
1686 */
1687 void
1688 mono_aot_register_globals (gpointer *globals)
1689 {
1690 g_assert_not_reached ();
1691 }
1692
1693 /*
1694 * mono_aot_register_module:
1695 *
1696 * This should be called by embedding code to register AOT modules statically linked
1697 * into the executable. AOT_INFO should be the value of the
1698 * 'mono_aot_module_<ASSEMBLY_NAME>_info' global symbol from the AOT module.
1699 */
1700 void
1701 mono_aot_register_module (gpointer *aot_info)
1702 {
1703 gpointer *globals;
1704 char *aname;
1705 MonoAotFileInfo *info = (gpointer)aot_info;
1706
1707 g_assert (info->version == MONO_AOT_FILE_VERSION);
1708
1709 globals = info->globals;
1710 g_assert (globals);
1711
1712 aname = info->assembly_name;
1713
1714 /* This could be called before startup */
1715 if (aot_modules)
1716 mono_aot_lock ();
1717
1718 if (!static_aot_modules)
1719 static_aot_modules = g_hash_table_new (g_str_hash, g_str_equal);
1720
1721 g_hash_table_insert (static_aot_modules, aname, info);
1722
1723 if (aot_modules)
1724 mono_aot_unlock ();
1725 }
1726
1727 void
1728 mono_aot_init (void)
1729 {
1730 InitializeCriticalSection (&aot_mutex);
1731 aot_modules = g_hash_table_new (NULL, NULL);
1732
1733 mono_install_assembly_load_hook (load_aot_module, NULL);
1734
1735 if (g_getenv ("MONO_LASTAOT"))
1736 mono_last_aot_method = atoi (g_getenv ("MONO_LASTAOT"));
1737 if (g_getenv ("MONO_AOT_CACHE"))
1738 use_aot_cache = TRUE;
1739 }
1740
1741 void
1742 mono_aot_cleanup (void)
1743 {
1744 if (aot_jit_icall_hash)
1745 g_hash_table_destroy (aot_jit_icall_hash);
1746 if (aot_modules)
1747 g_hash_table_destroy (aot_modules);
1748 }
1749
1750 static gboolean
1751 decode_cached_class_info (MonoAotModule *module, MonoCachedClassInfo *info, guint8 *buf, guint8 **endbuf)
1752 {
1753 guint32 flags;
1754 MethodRef ref;
1755 gboolean res;
1756
1757 info->vtable_size = decode_value (buf, &buf);
1758 if (info->vtable_size == -1)
1759 /* Generic type */
1760 return FALSE;
1761 flags = decode_value (buf, &buf);
1762 info->ghcimpl = (flags >> 0) & 0x1;
1763 info->has_finalize = (flags >> 1) & 0x1;
1764 info->has_cctor = (flags >> 2) & 0x1;
1765 info->has_nested_classes = (flags >> 3) & 0x1;
1766 info->blittable = (flags >> 4) & 0x1;
1767 info->has_references = (flags >> 5) & 0x1;
1768 info->has_static_refs = (flags >> 6) & 0x1;
1769 info->no_special_static_fields = (flags >> 7) & 0x1;
1770 info->is_generic_container = (flags >> 8) & 0x1;
1771
1772 if (info->has_cctor) {
1773 res = decode_method_ref (module, &ref, buf, &buf);
1774 if (!res)
1775 return FALSE;
1776 info->cctor_token = ref.token;
1777 }
1778 if (info->has_finalize) {
1779 res = decode_method_ref (module, &ref, buf, &buf);
1780 if (!res)
1781 return FALSE;
1782 info->finalize_image = ref.image;
1783 info->finalize_token = ref.token;
1784 }
1785
1786 info->instance_size = decode_value (buf, &buf);
1787 info->class_size = decode_value (buf, &buf);
1788 info->packing_size = decode_value (buf, &buf);
1789 info->min_align = decode_value (buf, &buf);
1790
1791 *endbuf = buf;
1792
1793 return TRUE;
1794 }
1795
1796 gpointer
1797 mono_aot_get_method_from_vt_slot (MonoDomain *domain, MonoVTable *vtable, int slot)
1798 {
1799 int i;
1800 MonoClass *klass = vtable->klass;
1801 MonoAotModule *amodule = klass->image->aot_module;
1802 guint8 *info, *p;
1803 MonoCachedClassInfo class_info;
1804 gboolean err;
1805 MethodRef ref;
1806 gboolean res;
1807
1808 if (MONO_CLASS_IS_INTERFACE (klass) || klass->rank || !amodule)
1809 return NULL;
1810
1811 info = &amodule->blob [mono_aot_get_offset (amodule->class_info_offsets, mono_metadata_token_index (klass->type_token) - 1)];
1812 p = info;
1813
1814 err = decode_cached_class_info (amodule, &class_info, p, &p);
1815 if (!err)
1816 return NULL;
1817
1818 for (i = 0; i < slot; ++i)
1819 decode_method_ref (amodule, &ref, p, &p);
1820
1821 res = decode_method_ref (amodule, &ref, p, &p);
1822 if (!res)
1823 return NULL;
1824 if (ref.no_aot_trampoline)
1825 return NULL;
1826
1827 if (mono_metadata_token_index (ref.token) == 0 || mono_metadata_token_table (ref.token) != MONO_TABLE_METHOD)
1828 return NULL;
1829
1830 return mono_aot_get_method_from_token (domain, ref.image, ref.token);
1831 }
1832
1833 gboolean
1834 mono_aot_get_cached_class_info (MonoClass *klass, MonoCachedClassInfo *res)
1835 {
1836 MonoAotModule *amodule = klass->image->aot_module;
1837 guint8 *p;
1838 gboolean err;
1839
1840 if (klass->rank || !amodule)
1841 return FALSE;
1842
1843 p = (guint8*)&amodule->blob [mono_aot_get_offset (amodule->class_info_offsets, mono_metadata_token_index (klass->type_token) - 1)];
1844
1845 err = decode_cached_class_info (amodule, res, p, &p);
1846 if (!err)
1847 return FALSE;
1848
1849 return TRUE;
1850 }
1851
1852 /**
1853 * mono_aot_get_class_from_name:
1854 *
1855 * Obtains a MonoClass with a given namespace and a given name which is located in IMAGE,
1856 * using a cache stored in the AOT file.
1857 * Stores the resulting class in *KLASS if found, stores NULL otherwise.
1858 *
1859 * Returns: TRUE if the klass was found/not found in the cache, FALSE if no aot file was
1860 * found.
1861 */
1862 gboolean
1863 mono_aot_get_class_from_name (MonoImage *image, const char *name_space, const char *name, MonoClass **klass)
1864 {
1865 MonoAotModule *amodule = image->aot_module;
1866 guint16 *table, *entry;
1867 guint16 table_size;
1868 guint32 hash;
1869 char full_name_buf [1024];
1870 char *full_name;
1871 const char *name2, *name_space2;
1872 MonoTableInfo *t;
1873 guint32 cols [MONO_TYPEDEF_SIZE];
1874 GHashTable *nspace_table;
1875
1876 if (!amodule || !amodule->class_name_table)
1877 return FALSE;
1878
1879 mono_aot_lock ();
1880
1881 *klass = NULL;
1882
1883 /* First look in the cache */
1884 if (!amodule->name_cache)
1885 amodule->name_cache = g_hash_table_new (g_str_hash, g_str_equal);
1886 nspace_table = g_hash_table_lookup (amodule->name_cache, name_space);
1887 if (nspace_table) {
1888 *klass = g_hash_table_lookup (nspace_table, name);
1889 if (*klass) {
1890 mono_aot_unlock ();
1891 return TRUE;
1892 }
1893 }
1894
1895 table_size = amodule->class_name_table [0];
1896 table = amodule->class_name_table + 1;
1897
1898 if (name_space [0] == '\0')
1899 full_name = g_strdup_printf ("%s", name);
1900 else {
1901 if (strlen (name_space) + strlen (name) < 1000) {
1902 sprintf (full_name_buf, "%s.%s", name_space, name);
1903 full_name = full_name_buf;
1904 } else {
1905 full_name = g_strdup_printf ("%s.%s", name_space, name);
1906 }
1907 }
1908 hash = mono_metadata_str_hash (full_name) % table_size;
1909 if (full_name != full_name_buf)
1910 g_free (full_name);
1911
1912 entry = &table [hash * 2];
1913
1914 if (entry [0] != 0) {
1915 t = &image->tables [MONO_TABLE_TYPEDEF];
1916
1917 while (TRUE) {
1918 guint32 index = entry [0];
1919 guint32 next = entry [1];
1920 guint32 token = mono_metadata_make_token (MONO_TABLE_TYPEDEF, index);
1921
1922 name_table_accesses ++;
1923
1924 mono_metadata_decode_row (t, index - 1, cols, MONO_TYPEDEF_SIZE);
1925
1926 name2 = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
1927 name_space2 = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
1928
1929 if (!strcmp (name, name2) && !strcmp (name_space, name_space2)) {
1930 mono_aot_unlock ();
1931 *klass = mono_class_get (image, token);
1932
1933 /* Add to cache */
1934 if (*klass) {
1935 mono_aot_lock ();
1936 nspace_table = g_hash_table_lookup (amodule->name_cache, name_space);
1937 if (!nspace_table) {
1938 nspace_table = g_hash_table_new (g_str_hash, g_str_equal);
1939 g_hash_table_insert (amodule->name_cache, (char*)name_space2, nspace_table);
1940 }
1941 g_hash_table_insert (nspace_table, (char*)name2, *klass);
1942 mono_aot_unlock ();
1943 }
1944 return TRUE;
1945 }
1946
1947 if (next != 0) {
1948 entry = &table [next * 2];
1949 } else {
1950 break;
1951 }
1952 }
1953 }
1954
1955 mono_aot_unlock ();
1956
1957 return TRUE;
1958 }
1959
1960 /*
1961 * decode_mono_eh_frame:
1962 *
1963 * Decode the EH information emitted by our modified LLVM compiler and construct a
1964 * MonoJitInfo structure from it.
1965 * LOCKING: Acquires the domain lock.
1966 */
1967 static MonoJitInfo*
1968 decode_llvm_mono_eh_frame (MonoAotModule *amodule, MonoDomain *domain,
1969 MonoMethod *method, guint8 *code,
1970 MonoJitExceptionInfo *clauses, int num_clauses,
1971 int extra_size, GSList **nesting,
1972 int *this_reg, int *this_offset)
1973 {
1974 guint8 *p;
1975 guint8 *fde, *cie, *code_start, *code_end;
1976 int version, fde_count;
1977 gint32 *table;
1978 int i, j, pos, left, right, offset, offset1, offset2, code_len, func_encoding;
1979 MonoJitExceptionInfo *ei;
1980 guint32 fde_len, ei_len, nested_len, nindex;
1981 gpointer *type_info;
1982 MonoJitInfo *jinfo;
1983 MonoLLVMFDEInfo info;
1984
1985 g_assert (amodule->mono_eh_frame);
1986
1987 p = amodule->mono_eh_frame;
1988
1989 /* p points to data emitted by LLVM in DwarfException::EmitMonoEHFrame () */
1990
1991 /* Header */
1992 version = *p;
1993 g_assert (version == 1 || version == 2);
1994 p ++;
1995 if (version == 2) {
1996 func_encoding = *p;
1997 p ++;
1998 } else {
1999 func_encoding = DW_EH_PE_pcrel;
2000 }
2001 p = ALIGN_PTR_TO (p, 4);
2002
2003 fde_count = *(guint32*)p;
2004 p += 4;
2005 table = (gint32*)p;
2006
2007 /* There is +1 entry in the table */
2008 cie = p + ((fde_count + 1) * 8);
2009
2010 /* Binary search in the table to find the entry for code */
2011 offset = code - amodule->mono_eh_frame;
2012
2013 left = 0;
2014 right = fde_count;
2015 while (TRUE) {
2016 pos = (left + right) / 2;
2017
2018 offset1 = table [(pos * 2)];
2019 if (pos + 1 == fde_count) {
2020 /* FIXME: */
2021 offset2 = amodule->code_end - amodule->code;
2022 } else {
2023 /* Encoded as DW_EH_PE_pcrel, but relative to mono_eh_frame */
2024 offset2 = table [(pos + 1) * 2];
2025 }
2026
2027 if (func_encoding == DW_EH_PE_absptr) {
2028 /*
2029 * Encoded as DW_EH_PE_absptr, because the ios linker can move functions inside object files to make thumb work,
2030 * so the offsets between two symbols in the text segment are not assembler constant.
2031 */
2032 g_assert (sizeof(gpointer) == 4);
2033 offset1 -= (gint32)(gsize)amodule->mono_eh_frame;
2034 offset2 -= (gint32)(gsize)amodule->mono_eh_frame;
2035 }
2036
2037 if (offset < offset1)
2038 right = pos;
2039 else if (offset >= offset2)
2040 left = pos + 1;
2041 else
2042 break;
2043 }
2044
2045 if (func_encoding == DW_EH_PE_absptr) {
2046 code_start = (gpointer)(gsize)table [(pos * 2)];
2047 code_end = (gpointer)(gsize)table [(pos * 2) + 2];
2048 } else {
2049 code_start = amodule->mono_eh_frame + table [(pos * 2)];
2050 /* This won't overflow because there is +1 entry in the table */
2051 code_end = amodule->mono_eh_frame + table [(pos * 2) + 2];
2052 }
2053 code_len = code_end - code_start;
2054
2055 g_assert (code >= code_start && code < code_end);
2056
2057 if (amodule->thumb_end && (guint8*)code_start < amodule->thumb_end)
2058 /* Clear thumb flag */
2059 code_start = (guint8*)(((mgreg_t)code_start) & ~1);
2060
2061 fde = amodule->mono_eh_frame + table [(pos * 2) + 1];
2062 /* This won't overflow because there is +1 entry in the table */
2063 fde_len = table [(pos * 2) + 2 + 1] - table [(pos * 2) + 1];
2064
2065 mono_unwind_decode_llvm_mono_fde (fde, fde_len, cie, code_start, &info);
2066 ei = info.ex_info;
2067 ei_len = info.ex_info_len;
2068 type_info = info.type_info;
2069 *this_reg = info.this_reg;
2070 *this_offset = info.this_offset;
2071
2072 /* Count number of nested clauses */
2073 nested_len = 0;
2074 for (i = 0; i < ei_len; ++i) {
2075 /* This might be unaligned */
2076 gint32 cindex1 = read32 (type_info [i]);
2077 GSList *l;
2078
2079 for (l = nesting [cindex1]; l; l = l->next) {
2080 gint32 nesting_cindex = GPOINTER_TO_INT (l->data);
2081
2082 for (j = 0; j < ei_len; ++j) {
2083 gint32 cindex2 = read32 (type_info [j]);
2084
2085 if (cindex2 == nesting_cindex)
2086 nested_len ++;
2087 }
2088 }
2089 }
2090
2091 /*
2092 * LLVM might represent one IL region with multiple regions, so have to
2093 * allocate a new JI.
2094 */
2095 jinfo =
2096 mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO + (sizeof (MonoJitExceptionInfo) * (ei_len + nested_len)) + extra_size);
2097
2098 jinfo->code_size = code_len;
2099 jinfo->used_regs = mono_cache_unwind_info (info.unw_info, info.unw_info_len);
2100 jinfo->method = method;
2101 jinfo->code_start = code;
2102 jinfo->domain_neutral = 0;
2103 /* This signals that used_regs points to a normal cached unwind info */
2104 jinfo->from_aot = 0;
2105 jinfo->num_clauses = ei_len + nested_len;
2106
2107 for (i = 0; i < ei_len; ++i) {
2108 /*
2109 * orig_jinfo contains the original IL exception info saved by the AOT
2110 * compiler, we have to combine that with the information produced by LLVM
2111 */
2112 /* The type_info entries contain IL clause indexes */
2113 int clause_index = read32 (type_info [i]);
2114 MonoJitExceptionInfo *jei = &jinfo->clauses [i];
2115 MonoJitExceptionInfo *orig_jei = &clauses [clause_index];
2116
2117 g_assert (clause_index < num_clauses);
2118 jei->flags = orig_jei->flags;
2119 jei->data.catch_class = orig_jei->data.catch_class;
2120
2121 jei->try_start = ei [i].try_start;
2122 jei->try_end = ei [i].try_end;
2123 jei->handler_start = ei [i].handler_start;
2124
2125 /* Make sure we transition to thumb when a handler starts */
2126 if (amodule->thumb_end && (guint8*)jei->handler_start < amodule->thumb_end)
2127 jei->handler_start = (void*)((mgreg_t)jei->handler_start + 1);
2128 }
2129
2130 /* See exception_cb () in mini-llvm.c as to why this is needed */
2131 nindex = ei_len;
2132 for (i = 0; i < ei_len; ++i) {
2133 gint32 cindex1 = read32 (type_info [i]);
2134 GSList *l;
2135
2136 for (l = nesting [cindex1]; l; l = l->next) {
2137 gint32 nesting_cindex = GPOINTER_TO_INT (l->data);
2138
2139 for (j = 0; j < ei_len; ++j) {
2140 gint32 cindex2 = read32 (type_info [j]);
2141
2142 if (cindex2 == nesting_cindex) {
2143 /*
2144 * The try interval comes from the nested clause, everything else from the
2145 * nesting clause.
2146 */
2147 memcpy (&jinfo->clauses [nindex], &jinfo->clauses [j], sizeof (MonoJitExceptionInfo));
2148 jinfo->clauses [nindex].try_start = jinfo->clauses [i].try_start;
2149 jinfo->clauses [nindex].try_end = jinfo->clauses [i].try_end;
2150 nindex ++;
2151 }
2152 }
2153 }
2154 }
2155 g_assert (nindex == ei_len + nested_len);
2156
2157 return jinfo;
2158 }
2159
2160 /*
2161 * LOCKING: Acquires the domain lock.
2162 */
2163 static MonoJitInfo*
2164 decode_exception_debug_info (MonoAotModule *amodule, MonoDomain *domain,
2165 MonoMethod *method, guint8* ex_info, guint8 *addr,
2166 guint8 *code, guint32 code_len)
2167 {
2168 int i, buf_len, num_clauses;
2169 MonoJitInfo *jinfo;
2170 guint used_int_regs, flags;
2171 gboolean has_generic_jit_info, has_dwarf_unwind_info, has_clauses, has_seq_points, has_try_block_holes, has_arch_eh_jit_info;
2172 gboolean from_llvm, has_gc_map;
2173 guint8 *p;
2174 int generic_info_size, try_holes_info_size, num_holes, arch_eh_jit_info_size;
2175 int this_reg = 0, this_offset = 0;
2176
2177 /* Load the method info from the AOT file */
2178
2179 p = ex_info;
2180 flags = decode_value (p, &p);
2181 has_generic_jit_info = (flags & 1) != 0;
2182 has_dwarf_unwind_info = (flags & 2) != 0;
2183 has_clauses = (flags & 4) != 0;
2184 has_seq_points = (flags & 8) != 0;
2185 from_llvm = (flags & 16) != 0;
2186 has_try_block_holes = (flags & 32) != 0;
2187 has_gc_map = (flags & 64) != 0;
2188 has_arch_eh_jit_info = (flags & 128) != 0;
2189
2190 if (has_dwarf_unwind_info) {
2191 guint32 offset;
2192
2193 offset = decode_value (p, &p);
2194 g_assert (offset < (1 << 30));
2195 used_int_regs = offset;
2196 } else {
2197 used_int_regs = decode_value (p, &p);
2198 }
2199 if (has_generic_jit_info)
2200 generic_info_size = sizeof (MonoGenericJitInfo);
2201 else
2202 generic_info_size = 0;
2203
2204 if (has_try_block_holes) {
2205 num_holes = decode_value (p, &p);
2206 try_holes_info_size = sizeof (MonoTryBlockHoleTableJitInfo) + num_holes * sizeof (MonoTryBlockHoleJitInfo);
2207 } else {
2208 num_holes = try_holes_info_size = 0;
2209 }
2210 /* Exception table */
2211 if (has_clauses)
2212 num_clauses = decode_value (p, &p);
2213 else
2214 num_clauses = 0;
2215 if (has_arch_eh_jit_info)
2216 arch_eh_jit_info_size = sizeof (MonoArchEHJitInfo);
2217 else
2218 arch_eh_jit_info_size = 0;
2219
2220 if (from_llvm) {
2221 MonoJitExceptionInfo *clauses;
2222 GSList **nesting;
2223
2224 /*
2225 * Part of the info is encoded by the AOT compiler, the rest is in the .eh_frame
2226 * section.
2227 */
2228 clauses = g_new0 (MonoJitExceptionInfo, num_clauses);
2229 nesting = g_new0 (GSList*, num_clauses);
2230
2231 for (i = 0; i < num_clauses; ++i) {
2232 MonoJitExceptionInfo *ei = &clauses [i];
2233
2234 ei->flags = decode_value (p, &p);
2235
2236 if (decode_value (p, &p))
2237 ei->data.catch_class = decode_klass_ref (amodule, p, &p);
2238
2239 /* Read the list of nesting clauses */
2240 while (TRUE) {
2241 int nesting_index = decode_value (p, &p);
2242 if (nesting_index == -1)
2243 break;
2244 nesting [i] = g_slist_prepend (nesting [i], GINT_TO_POINTER (nesting_index));
2245 }
2246 }
2247
2248 jinfo = decode_llvm_mono_eh_frame (amodule, domain, method, code, clauses, num_clauses, generic_info_size + try_holes_info_size + arch_eh_jit_info_size, nesting, &this_reg, &this_offset);
2249 jinfo->from_llvm = 1;
2250
2251 g_free (clauses);
2252 for (i = 0; i < num_clauses; ++i)
2253 g_slist_free (nesting [i]);
2254 g_free (nesting);
2255 } else {
2256 jinfo =
2257 mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO + (sizeof (MonoJitExceptionInfo) * num_clauses) + generic_info_size + try_holes_info_size + arch_eh_jit_info_size);
2258 jinfo->num_clauses = num_clauses;
2259
2260 for (i = 0; i < jinfo->num_clauses; ++i) {
2261 MonoJitExceptionInfo *ei = &jinfo->clauses [i];
2262
2263 ei->flags = decode_value (p, &p);
2264
2265 ei->exvar_offset = decode_value (p, &p);
2266
2267 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER || ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY)
2268 ei->data.filter = code + decode_value (p, &p);
2269 else {
2270 if (decode_value (p, &p))
2271 ei->data.catch_class = decode_klass_ref (amodule, p, &p);
2272 }
2273
2274 ei->try_start = code + decode_value (p, &p);
2275 ei->try_end = code + decode_value (p, &p);
2276 ei->handler_start = code + decode_value (p, &p);
2277 }
2278
2279 jinfo->code_size = code_len;
2280 jinfo->used_regs = used_int_regs;
2281 jinfo->method = method;
2282 jinfo->code_start = code;
2283 jinfo->domain_neutral = 0;
2284 jinfo->from_aot = 1;
2285 }
2286
2287 if (has_generic_jit_info) {
2288 MonoGenericJitInfo *gi;
2289
2290 jinfo->has_generic_jit_info = 1;
2291
2292 gi = mono_jit_info_get_generic_jit_info (jinfo);
2293 g_assert (gi);
2294
2295 gi->nlocs = decode_value (p, &p);
2296 if (gi->nlocs) {
2297 gi->locations = mono_domain_alloc0 (domain, gi->nlocs * sizeof (MonoDwarfLocListEntry));
2298 for (i = 0; i < gi->nlocs; ++i) {
2299 MonoDwarfLocListEntry *entry = &gi->locations [i];
2300
2301 entry->is_reg = decode_value (p, &p);
2302 entry->reg = decode_value (p, &p);
2303 if (!entry->is_reg)
2304 entry->offset = decode_value (p, &p);
2305 if (i > 0)
2306 entry->from = decode_value (p, &p);
2307 entry->to = decode_value (p, &p);
2308 }
2309 } else {
2310 if (from_llvm) {
2311 gi->has_this = this_reg != -1;
2312 gi->this_reg = this_reg;
2313 gi->this_offset = this_offset;
2314 } else {
2315 gi->has_this = decode_value (p, &p);
2316 gi->this_reg = decode_value (p, &p);
2317 gi->this_offset = decode_value (p, &p);
2318 }
2319 }
2320
2321 /* This currently contains no data */
2322 gi->generic_sharing_context = g_new0 (MonoGenericSharingContext, 1);
2323
2324 jinfo->method = decode_resolve_method_ref (amodule, p, &p);
2325 }
2326
2327 if (has_try_block_holes) {
2328 MonoTryBlockHoleTableJitInfo *table;
2329
2330 jinfo->has_try_block_holes = 1;
2331
2332 table = mono_jit_info_get_try_block_hole_table_info (jinfo);
2333 g_assert (table);
2334
2335 table->num_holes = (guint16)num_holes;
2336 for (i = 0; i < num_holes; ++i) {
2337 MonoTryBlockHoleJitInfo *hole = &table->holes [i];
2338 hole->clause = decode_value (p, &p);
2339 hole->length = decode_value (p, &p);
2340 hole->offset = decode_value (p, &p);
2341 }
2342 }
2343
2344 if (has_arch_eh_jit_info) {
2345 MonoArchEHJitInfo *eh_info;
2346
2347 jinfo->has_arch_eh_info = 1;
2348
2349 eh_info = mono_jit_info_get_arch_eh_info (jinfo);
2350 eh_info->stack_size = decode_value (p, &p);
2351 }
2352
2353 if (has_seq_points) {
2354 MonoSeqPointInfo *seq_points;
2355 int il_offset, native_offset, last_il_offset, last_native_offset, j;
2356
2357 int len = decode_value (p, &p);
2358
2359 seq_points = g_malloc0 (sizeof (MonoSeqPointInfo) + (len - MONO_ZERO_LEN_ARRAY) * sizeof (SeqPoint));
2360 seq_points->len = len;
2361 last_il_offset = last_native_offset = 0;
2362 for (i = 0; i < len; ++i) {
2363 SeqPoint *sp = &seq_points->seq_points [i];
2364 il_offset = last_il_offset + decode_value (p, &p);
2365 native_offset = last_native_offset + decode_value (p, &p);
2366
2367 sp->il_offset = il_offset;
2368 sp->native_offset = native_offset;
2369
2370 sp->next_len = decode_value (p, &p);
2371 sp->next = g_new (int, sp->next_len);
2372 for (j = 0; j < sp->next_len; ++j)
2373 sp->next [j] = decode_value (p, &p);
2374
2375 last_il_offset = il_offset;
2376 last_native_offset = native_offset;
2377 }
2378
2379 mono_domain_lock (domain);
2380 g_hash_table_insert (domain_jit_info (domain)->seq_points, method, seq_points);
2381 mono_domain_unlock (domain);
2382 }
2383
2384 /* Load debug info */
2385 buf_len = decode_value (p, &p);
2386 mono_debug_add_aot_method (domain, method, code, p, buf_len);
2387 p += buf_len;
2388
2389 if (has_gc_map) {
2390 int map_size = decode_value (p, &p);
2391 /* The GC map requires 4 bytes of alignment */
2392 while ((guint64)(gsize)p % 4)
2393 p ++;
2394 jinfo->gc_info = p;
2395 p += map_size;
2396 }
2397
2398 if (amodule != jinfo->method->klass->image->aot_module) {
2399 mono_aot_lock ();
2400 if (!ji_to_amodule)
2401 ji_to_amodule = g_hash_table_new (NULL, NULL);
2402 g_hash_table_insert (ji_to_amodule, jinfo, amodule);
2403 mono_aot_unlock ();
2404 }
2405
2406 return jinfo;
2407 }
2408
2409 /*
2410 * mono_aot_get_unwind_info:
2411 *
2412 * Return a pointer to the DWARF unwind info belonging to JI.
2413 */
2414 guint8*
2415 mono_aot_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
2416 {
2417 MonoAotModule *amodule = ji->method->klass->image->aot_module;
2418 guint8 *p;
2419 guint8 *code = ji->code_start;
2420
2421 g_assert (amodule);
2422 g_assert (ji->from_aot);
2423
2424 if (!(code >= amodule->code && code <= amodule->code_end)) {
2425 /* ji belongs to a different aot module than amodule */
2426 mono_aot_lock ();
2427 g_assert (ji_to_amodule);
2428 amodule = g_hash_table_lookup (ji_to_amodule, ji);
2429 g_assert (amodule);
2430 g_assert (code >= amodule->code && code <= amodule->code_end);
2431 mono_aot_unlock ();
2432 }
2433
2434 p = amodule->unwind_info + ji->used_regs;
2435 *unwind_info_len = decode_value (p, &p);
2436 return p;
2437 }
2438
2439 static G_GNUC_UNUSED int
2440 compare_ints (const void *a, const void *b)
2441 {
2442 return *(gint32*)a - *(gint32*)b;
2443 }
2444
2445 static void
2446 msort_code_offsets_internal (gint32 *array, int lo, int hi, gint32 *scratch)
2447 {
2448 int mid = (lo + hi) / 2;
2449 int i, t_lo, t_hi;
2450
2451 if (lo >= hi)
2452 return;
2453
2454 if (hi - lo < 32) {
2455 for (i = lo; i < hi; ++i)
2456 if (array [(i * 2)] > array [(i * 2) + 2])
2457 break;
2458 if (i == hi)
2459 /* Already sorted */
2460 return;
2461 }
2462
2463 msort_code_offsets_internal (array, lo, mid, scratch);
2464 msort_code_offsets_internal (array, mid + 1, hi, scratch);
2465
2466 if (array [mid * 2] < array [(mid + 1) * 2])
2467 return;
2468
2469 /* Merge */
2470 t_lo = lo;
2471 t_hi = mid + 1;
2472 for (i = lo; i <= hi; i ++) {
2473 if (t_lo <= mid && ((t_hi > hi) || array [t_lo * 2] < array [t_hi * 2])) {
2474 scratch [(i * 2)] = array [t_lo * 2];
2475 scratch [(i * 2) + 1] = array [(t_lo *2) + 1];
2476 t_lo ++;
2477 } else {
2478 scratch [(i * 2)] = array [t_hi * 2];
2479 scratch [(i * 2) + 1] = array [(t_hi *2) + 1];
2480 t_hi ++;
2481 }
2482 }
2483 for (i = lo; i <= hi; ++i) {
2484 array [(i * 2)] = scratch [i * 2];
2485 array [(i * 2) + 1] = scratch [(i * 2) + 1];
2486 }
2487 }
2488
2489 static void
2490 msort_code_offsets (gint32 *array, int len)
2491 {
2492 gint32 *scratch;
2493
2494 scratch = g_new (gint32, len * 2);
2495 msort_code_offsets_internal (array, 0, len - 1, scratch);
2496 g_free (scratch);
2497 }
2498
2499 MonoJitInfo *
2500 mono_aot_find_jit_info (MonoDomain *domain, MonoImage *image, gpointer addr)
2501 {
2502 int pos, left, right, offset, offset1, offset2, code_len;
2503 int method_index, table_len;
2504 guint32 token;
2505 MonoAotModule *amodule = image->aot_module;
2506 MonoMethod *method;
2507 MonoJitInfo *jinfo;
2508 guint8 *code, *ex_info, *p;
2509 guint32 *table;
2510 int nmethods = amodule->info.nmethods;
2511 gint32 *code_offsets;
2512 int offsets_len, i;
2513
2514 if (!amodule)
2515 return NULL;
2516
2517 if (domain != mono_get_root_domain ())
2518 /* FIXME: */
2519 return NULL;
2520
2521 offset = (guint8*)addr - amodule->code;
2522
2523 /* Compute a sorted table mapping code offsets to method indexes. */
2524 if (!amodule->sorted_code_offsets) {
2525 code_offsets = g_new0 (gint32, nmethods * 2);
2526 offsets_len = 0;
2527 for (i = 0; i < nmethods; ++i) {
2528 /* Skip the -1 entries to speed up sorting */
2529 if (amodule->code_offsets [i] == 0xffffffff)
2530 continue;
2531 code_offsets [(offsets_len * 2)] = amodule->code_offsets [i];
2532 code_offsets [(offsets_len *2) + 1] = i;
2533 offsets_len ++;
2534 }
2535 /* Use a merge sort as this is mostly sorted */
2536 msort_code_offsets (code_offsets, offsets_len);
2537 //qsort (code_offsets, offsets_len, sizeof (gint32) * 2, compare_ints);
2538 for (i = 0; i < offsets_len -1; ++i)
2539 g_assert (code_offsets [(i * 2)] <= code_offsets [(i + 1) * 2]);
2540
2541 amodule->sorted_code_offsets_len = offsets_len;
2542 mono_memory_barrier ();
2543 if (InterlockedCompareExchangePointer ((gpointer*)&amodule->sorted_code_offsets, code_offsets, NULL) != NULL)
2544 /* Somebody got in before us */
2545 g_free (code_offsets);
2546 }
2547
2548 code_offsets = amodule->sorted_code_offsets;
2549 offsets_len = amodule->sorted_code_offsets_len;
2550
2551 if (offsets_len > 0 && (offset < code_offsets [0] || offset >= (amodule->code_end - amodule->code)))
2552 return NULL;
2553
2554 /* Binary search in the sorted_code_offsets table */
2555 left = 0;
2556 right = offsets_len;
2557 while (TRUE) {
2558 pos = (left + right) / 2;
2559
2560 offset1 = code_offsets [(pos * 2)];
2561 if (pos + 1 == offsets_len)
2562 offset2 = amodule->code_end - amodule->code;
2563 else
2564 offset2 = code_offsets [(pos + 1) * 2];
2565
2566 if (offset < offset1)
2567 right = pos;
2568 else if (offset >= offset2)
2569 left = pos + 1;
2570 else
2571 break;
2572 }
2573
2574 g_assert (offset >= code_offsets [(pos * 2)]);
2575 if (pos + 1 < offsets_len)
2576 g_assert (offset < code_offsets [((pos + 1) * 2)]);
2577 method_index = code_offsets [(pos * 2) + 1];
2578
2579 code = &amodule->code [amodule->code_offsets [method_index]];
2580 ex_info = &amodule->blob [mono_aot_get_offset (amodule->ex_info_offsets, method_index)];
2581
2582 if (pos == offsets_len - 1)
2583 code_len = amodule->code_end - code;
2584 else
2585 code_len = code_offsets [(pos + 1) * 2] - code_offsets [pos * 2];
2586
2587 g_assert ((guint8*)code <= (guint8*)addr && (guint8*)addr < (guint8*)code + code_len);
2588
2589 /* Might be a wrapper/extra method */
2590 if (amodule->extra_methods) {
2591 mono_aot_lock ();
2592 method = g_hash_table_lookup (amodule->extra_methods, GUINT_TO_POINTER (method_index));
2593 mono_aot_unlock ();
2594 } else {
2595 method = NULL;
2596 }
2597
2598 if (!method) {
2599 if (method_index >= image->tables [MONO_TABLE_METHOD].rows) {
2600 /*
2601 * This is hit for extra methods which are called directly, so they are
2602 * not in amodule->extra_methods.
2603 */
2604 table_len = amodule->extra_method_info_offsets [0];
2605 table = amodule->extra_method_info_offsets + 1;
2606 left = 0;
2607 right = table_len;
2608 pos = 0;
2609
2610 /* Binary search */
2611 while (TRUE) {
2612 pos = ((left + right) / 2);
2613
2614 g_assert (pos < table_len);
2615
2616 if (table [pos * 2] < method_index)
2617 left = pos + 1;
2618 else if (table [pos * 2] > method_index)
2619 right = pos;
2620 else
2621 break;
2622 }
2623
2624 p = amodule->blob + table [(pos * 2) + 1];
2625 method = decode_resolve_method_ref (amodule, p, &p);
2626 if (!method)
2627 /* Happens when a random address is passed in which matches a not-yey called wrapper encoded using its name */
2628 return NULL;
2629 } else {
2630 token = mono_metadata_make_token (MONO_TABLE_METHOD, method_index + 1);
2631 method = mono_get_method (image, token, NULL);
2632 }
2633 }
2634
2635 /* FIXME: */
2636 g_assert (method);
2637
2638 //printf ("F: %s\n", mono_method_full_name (method, TRUE));
2639
2640 jinfo = decode_exception_debug_info (amodule, domain, method, ex_info, addr, code, code_len);
2641
2642 g_assert ((guint8*)addr >= (guint8*)jinfo->code_start);
2643 g_assert ((guint8*)addr < (guint8*)jinfo->code_start + jinfo->code_size);
2644
2645 /* Add it to the normal JitInfo tables */
2646 mono_jit_info_table_add (domain, jinfo);
2647
2648 return jinfo;
2649 }
2650
2651 static gboolean
2652 decode_patch (MonoAotModule *aot_module, MonoMemPool *mp, MonoJumpInfo *ji, guint8 *buf, guint8 **endbuf)
2653 {
2654 guint8 *p = buf;
2655 gpointer *table;
2656 MonoImage *image;
2657 int i;
2658
2659 switch (ji->type) {
2660 case MONO_PATCH_INFO_METHOD:
2661 case MONO_PATCH_INFO_METHOD_JUMP:
2662 case MONO_PATCH_INFO_ICALL_ADDR:
2663 case MONO_PATCH_INFO_METHOD_RGCTX: {
2664 MethodRef ref;
2665 gboolean res;
2666
2667 res = decode_method_ref (aot_module, &ref, p, &p);
2668 if (!res)
2669 goto cleanup;
2670
2671 if (!ref.method && !mono_aot_only && !ref.no_aot_trampoline && (ji->type == MONO_PATCH_INFO_METHOD) && (mono_metadata_token_table (ref.token) == MONO_TABLE_METHOD)) {
2672 ji->data.target = mono_create_ftnptr (mono_domain_get (), mono_create_jit_trampoline_from_token (ref.image, ref.token));
2673 ji->type = MONO_PATCH_INFO_ABS;
2674 }
2675 else {
2676 if (ref.method)
2677 ji->data.method = ref.method;
2678 else
2679 ji->data.method = mono_get_method (ref.image, ref.token, NULL);
2680 g_assert (ji->data.method);
2681 mono_class_init (ji->data.method->klass);
2682 }
2683 break;
2684 }
2685 case MONO_PATCH_INFO_INTERNAL_METHOD:
2686 case MONO_PATCH_INFO_JIT_ICALL_ADDR: {
2687 guint32 len = decode_value (p, &p);
2688
2689 ji->data.name = (char*)p;
2690 p += len + 1;
2691 break;
2692 }
2693 case MONO_PATCH_INFO_METHODCONST:
2694 /* Shared */
2695 ji->data.method = decode_resolve_method_ref (aot_module, p, &p);
2696 if (!ji->data.method)
2697 goto cleanup;
2698 break;
2699 case MONO_PATCH_INFO_VTABLE:
2700 case MONO_PATCH_INFO_CLASS:
2701 case MONO_PATCH_INFO_IID:
2702 case MONO_PATCH_INFO_ADJUSTED_IID:
2703 /* Shared */
2704 ji->data.klass = decode_klass_ref (aot_module, p, &p);
2705 if (!ji->data.klass)
2706 goto cleanup;
2707 break;
2708 case MONO_PATCH_INFO_CLASS_INIT:
2709 case MONO_PATCH_INFO_DELEGATE_TRAMPOLINE:
2710 ji->data.klass = decode_klass_ref (aot_module, p, &p);
2711 if (!ji->data.klass)
2712 goto cleanup;
2713 break;
2714 case MONO_PATCH_INFO_IMAGE:
2715 ji->data.image = load_image (aot_module, decode_value (p, &p), TRUE);
2716 if (!ji->data.image)
2717 goto cleanup;
2718 break;
2719 case MONO_PATCH_INFO_FIELD:
2720 case MONO_PATCH_INFO_SFLDA:
2721 /* Shared */
2722 ji->data.field = decode_field_info (aot_module, p, &p);
2723 if (!ji->data.field)
2724 goto cleanup;
2725 break;
2726 case MONO_PATCH_INFO_SWITCH:
2727 ji->data.table = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoBBTable));
2728 ji->data.table->table_size = decode_value (p, &p);
2729 table = mono_domain_alloc (mono_domain_get (), sizeof (gpointer) * ji->data.table->table_size);
2730 ji->data.table->table = (MonoBasicBlock**)table;
2731 for (i = 0; i < ji->data.table->table_size; i++)
2732 table [i] = (gpointer)(gssize)decode_value (p, &p);
2733 break;
2734 case MONO_PATCH_INFO_R4: {
2735 guint32 val;
2736
2737 ji->data.target = mono_domain_alloc0 (mono_domain_get (), sizeof (float));
2738 val = decode_value (p, &p);
2739 *(float*)ji->data.target = *(float*)&val;
2740 break;
2741 }
2742 case MONO_PATCH_INFO_R8: {
2743 guint32 val [2];
2744 guint64 v;
2745
2746 ji->data.target = mono_domain_alloc0 (mono_domain_get (), sizeof (double));
2747
2748 val [0] = decode_value (p, &p);
2749 val [1] = decode_value (p, &p);
2750 v = ((guint64)val [1] << 32) | ((guint64)val [0]);
2751 *(double*)ji->data.target = *(double*)&v;
2752 break;
2753 }
2754 case MONO_PATCH_INFO_LDSTR:
2755 image = load_image (aot_module, decode_value (p, &p), TRUE);
2756 if (!image)
2757 goto cleanup;
2758 ji->data.token = mono_jump_info_token_new (mp, image, MONO_TOKEN_STRING + decode_value (p, &p));
2759 break;
2760 case MONO_PATCH_INFO_RVA:
2761 case MONO_PATCH_INFO_DECLSEC:
2762 case MONO_PATCH_INFO_LDTOKEN:
2763 case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
2764 /* Shared */
2765 image = load_image (aot_module, decode_value (p, &p), TRUE);
2766 if (!image)
2767 goto cleanup;
2768 ji->data.token = mono_jump_info_token_new (mp, image, decode_value (p, &p));
2769
2770 ji->data.token->has_context = decode_value (p, &p);
2771 if (ji->data.token->has_context) {
2772 gboolean res = decode_generic_context (aot_module, &ji->data.token->context, p, &p);
2773 if (!res)
2774 goto cleanup;
2775 }
2776 break;
2777 case MONO_PATCH_INFO_EXC_NAME:
2778 ji->data.klass = decode_klass_ref (aot_module, p, &p);
2779 if (!ji->data.klass)
2780 goto cleanup;
2781 ji->data.name = ji->data.klass->name;
2782 break;
2783 case MONO_PATCH_INFO_METHOD_REL:
2784 ji->data.offset = decode_value (p, &p);
2785 break;
2786 case MONO_PATCH_INFO_INTERRUPTION_REQUEST_FLAG:
2787 case MONO_PATCH_INFO_GENERIC_CLASS_INIT:
2788 case MONO_PATCH_INFO_MONITOR_ENTER:
2789 case MONO_PATCH_INFO_MONITOR_EXIT:
2790 case MONO_PATCH_INFO_GC_CARD_TABLE_ADDR:
2791 case MONO_PATCH_INFO_CASTCLASS_CACHE:
2792 break;
2793 case MONO_PATCH_INFO_RGCTX_FETCH: {
2794 gboolean res;
2795 MonoJumpInfoRgctxEntry *entry;
2796 guint32 offset, val;
2797 guint8 *p2;
2798
2799 offset = decode_value (p, &p);
2800 val = decode_value (p, &p);
2801
2802 entry = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoRgctxEntry));
2803 p2 = aot_module->blob + offset;
2804 entry->method = decode_resolve_method_ref (aot_module, p2, &p2);
2805 entry->in_mrgctx = ((val & 1) > 0) ? TRUE : FALSE;
2806 entry->info_type = (val >> 1) & 0xff;
2807 entry->data = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfo));
2808 entry->data->type = (val >> 9) & 0xff;
2809
2810 res = decode_patch (aot_module, mp, entry->data, p, &p);
2811 if (!res)
2812 goto cleanup;
2813 ji->data.rgctx_entry = entry;
2814 break;
2815 }
2816 case MONO_PATCH_INFO_SEQ_POINT_INFO:
2817 break;
2818 case MONO_PATCH_INFO_LLVM_IMT_TRAMPOLINE: {
2819 MonoJumpInfoImtTramp *imt_tramp = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoImtTramp));
2820
2821 imt_tramp->method = decode_resolve_method_ref (aot_module, p, &p);
2822 imt_tramp->vt_offset = decode_value (p, &p);
2823
2824 ji->data.imt_tramp = imt_tramp;
2825 break;
2826 }
2827 case MONO_PATCH_INFO_SIGNATURE:
2828 ji->data.target = decode_signature (aot_module, p, &p);
2829 break;
2830 default:
2831 g_warning ("unhandled type %d", ji->type);
2832 g_assert_not_reached ();
2833 }
2834
2835 *endbuf = p;
2836
2837 return TRUE;
2838
2839 cleanup:
2840 return FALSE;
2841 }
2842
2843 static MonoJumpInfo*
2844 load_patch_info (MonoAotModule *aot_module, MonoMemPool *mp, int n_patches,
2845 guint32 **got_slots,
2846 guint8 *buf, guint8 **endbuf)
2847 {
2848 MonoJumpInfo *patches;
2849 int pindex;
2850 guint8 *p;
2851
2852 p = buf;
2853
2854 patches = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfo) * n_patches);
2855
2856 *got_slots = g_malloc (sizeof (guint32) * n_patches);
2857
2858 for (pindex = 0; pindex < n_patches; ++pindex) {
2859 MonoJumpInfo *ji = &patches [pindex];
2860 guint8 *shared_p;
2861 gboolean res;
2862 guint32 got_offset;
2863
2864 got_offset = decode_value (p, &p);
2865
2866 if (aot_module->got [got_offset]) {
2867 /* Already loaded */
2868 //printf ("HIT!\n");
2869 } else {
2870 shared_p = aot_module->blob + mono_aot_get_offset (aot_module->got_info_offsets, got_offset);
2871
2872 ji->type = decode_value (shared_p, &shared_p);
2873
2874 res = decode_patch (aot_module, mp, ji, shared_p, &shared_p);
2875 if (!res)
2876 goto cleanup;
2877 }
2878
2879 (*got_slots) [pindex] = got_offset;
2880 }
2881
2882 *endbuf = p;
2883 return patches;
2884
2885 cleanup:
2886 g_free (*got_slots);
2887 *got_slots = NULL;
2888
2889 return NULL;
2890 }
2891
2892 static void
2893 register_jump_target_got_slot (MonoDomain *domain, MonoMethod *method, gpointer *got_slot)
2894 {
2895 /*
2896 * Jump addresses cannot be patched by the trampoline code since it
2897 * does not have access to the caller's address. Instead, we collect
2898 * the addresses of the GOT slots pointing to a method, and patch
2899 * them after the method has been compiled.
2900 */
2901 MonoJitDomainInfo *info = domain_jit_info (domain);
2902 GSList *list;
2903
2904 mono_domain_lock (domain);
2905 if (!info->jump_target_got_slot_hash)
2906 info->jump_target_got_slot_hash = g_hash_table_new (NULL, NULL);
2907 list = g_hash_table_lookup (info->jump_target_got_slot_hash, method);
2908 list = g_slist_prepend (list, got_slot);
2909 g_hash_table_insert (info->jump_target_got_slot_hash, method, list);
2910 mono_domain_unlock (domain);
2911 }
2912
2913 /*
2914 * load_method:
2915 *
2916 * Load the method identified by METHOD_INDEX from the AOT image. Return a
2917 * pointer to the native code of the method, or NULL if not found.
2918 * METHOD might not be set if the caller only has the image/token info.
2919 */
2920 static gpointer
2921 load_method (MonoDomain *domain, MonoAotModule *amodule, MonoImage *image, MonoMethod *method, guint32 token, int method_index)
2922 {
2923 MonoClass *klass;
2924 gboolean from_plt = method == NULL;
2925 MonoMemPool *mp;
2926 int i, pindex, n_patches, used_strings;
2927 gboolean keep_patches = TRUE;
2928 guint8 *p;
2929 MonoJitInfo *jinfo = NULL;
2930 guint8 *code, *info;
2931
2932 if (mono_profiler_get_events () & MONO_PROFILE_ENTER_LEAVE)
2933 return NULL;
2934
2935 if ((domain != mono_get_root_domain ()) && (!(amodule->info.opts & MONO_OPT_SHARED)))
2936 /* Non shared AOT code can't be used in other appdomains */
2937 return NULL;
2938
2939 if (amodule->out_of_date)
2940 return NULL;
2941
2942 if (amodule->code_offsets [method_index] == 0xffffffff) {
2943 if (mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
2944 char *full_name;
2945
2946 if (!method)
2947 method = mono_get_method (image, token, NULL);
2948 full_name = mono_method_full_name (method, TRUE);
2949 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT NOT FOUND: %s.\n", full_name);
2950 g_free (full_name);
2951 }
2952 return NULL;
2953 }
2954
2955 code = &amodule->code [amodule->code_offsets [method_index]];
2956
2957 info = &amodule->blob [mono_aot_get_offset (amodule->method_info_offsets, method_index)];
2958
2959 if (amodule->thumb_end && code < amodule->thumb_end) {
2960 /* Convert this into a thumb address */
2961 g_assert ((amodule->code_offsets [method_index] & 0x1) == 0);
2962 code = &amodule->code [amodule->code_offsets [method_index] + 1];
2963 }
2964
2965 mono_aot_lock ();
2966 if (!amodule->methods_loaded)
2967 amodule->methods_loaded = g_new0 (guint32, amodule->info.nmethods / 32 + 1);
2968 mono_aot_unlock ();
2969
2970 if ((amodule->methods_loaded [method_index / 32] >> (method_index % 32)) & 0x1)
2971 return code;
2972
2973 if (mono_last_aot_method != -1) {
2974 if (mono_jit_stats.methods_aot >= mono_last_aot_method)
2975 return NULL;
2976 else if (mono_jit_stats.methods_aot == mono_last_aot_method - 1) {
2977 if (!method)
2978 method = mono_get_method (image, token, NULL);
2979 if (method) {
2980 char *name = mono_method_full_name (method, TRUE);
2981 printf ("LAST AOT METHOD: %s.\n", name);
2982 g_free (name);
2983 } else {
2984 printf ("LAST AOT METHOD: %p %d\n", code, method_index);
2985 }
2986 }
2987 }
2988
2989 p = info;
2990
2991 if (method) {
2992 klass = method->klass;
2993 decode_klass_ref (amodule, p, &p);
2994 } else {
2995 klass = decode_klass_ref (amodule, p, &p);
2996 }
2997
2998 if (amodule->info.opts & MONO_OPT_SHARED)
2999 used_strings = decode_value (p, &p);
3000 else
3001 used_strings = 0;
3002
3003 for (i = 0; i < used_strings; i++) {
3004 guint token = decode_value (p, &p);
3005 mono_ldstr (mono_get_root_domain (), image, mono_metadata_token_index (token));
3006 }
3007
3008 if (amodule->info.opts & MONO_OPT_SHARED)
3009 keep_patches = FALSE;
3010
3011 n_patches = decode_value (p, &p);
3012
3013 keep_patches = FALSE;
3014
3015 if (n_patches) {
3016 MonoJumpInfo *patches;
3017 guint32 *got_slots;
3018
3019 if (keep_patches)
3020 mp = domain->mp;
3021 else
3022 mp = mono_mempool_new ();
3023
3024 patches = load_patch_info (amodule, mp, n_patches, &got_slots, p, &p);
3025 if (patches == NULL)
3026 goto cleanup;
3027
3028 for (pindex = 0; pindex < n_patches; ++pindex) {
3029 MonoJumpInfo *ji = &patches [pindex];
3030
3031 if (!amodule->got [got_slots [pindex]]) {
3032 amodule->got [got_slots [pindex]] = mono_resolve_patch_target (method, domain, code, ji, TRUE);
3033 if (ji->type == MONO_PATCH_INFO_METHOD_JUMP)
3034 amodule->got [got_slots [pindex]] = mono_create_ftnptr (domain, amodule->got [got_slots [pindex]]);
3035 if (ji->type == MONO_PATCH_INFO_METHOD_JUMP)
3036 register_jump_target_got_slot (domain, ji->data.method, &(amodule->got [got_slots [pindex]]));
3037 }
3038 ji->type = MONO_PATCH_INFO_NONE;
3039 }
3040
3041 g_free (got_slots);
3042
3043 if (!keep_patches)
3044 mono_mempool_destroy (mp);
3045 }
3046
3047 if (mini_get_debug_options ()->load_aot_jit_info_eagerly)
3048 jinfo = mono_aot_find_jit_info (domain, amodule->assembly->image, code);
3049
3050 if (mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
3051 char *full_name;
3052
3053 if (!method)
3054 method = mono_get_method (image, token, NULL);
3055
3056 full_name = mono_method_full_name (method, TRUE);
3057
3058 if (!jinfo)
3059 jinfo = mono_aot_find_jit_info (domain, amodule->assembly->image, code);
3060
3061 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT FOUND method %s [%p - %p %p]\n", full_name, code, code + jinfo->code_size, info);
3062 g_free (full_name);
3063 }
3064
3065 mono_aot_lock ();
3066
3067 InterlockedIncrement (&mono_jit_stats.methods_aot);
3068
3069 amodule->methods_loaded [method_index / 32] |= 1 << (method_index % 32);
3070
3071 init_plt (amodule);
3072
3073 if (method && method->wrapper_type)
3074 g_hash_table_insert (amodule->method_to_code, method, code);
3075
3076 mono_aot_unlock ();
3077
3078 if (mono_profiler_get_events () & MONO_PROFILE_JIT_COMPILATION) {
3079 MonoJitInfo *jinfo;
3080
3081 if (!method) {
3082 method = mono_get_method (image, token, NULL);
3083 g_assert (method);
3084 }
3085 mono_profiler_method_jit (method);
3086 jinfo = mono_jit_info_table_find (domain, (char*)code);
3087 g_assert (jinfo);
3088 mono_profiler_method_end_jit (method, jinfo, MONO_PROFILE_OK);
3089 }
3090
3091 if (from_plt && klass && !klass->generic_container)
3092 mono_runtime_class_init (mono_class_vtable (domain, klass));
3093
3094 return code;
3095
3096 cleanup:
3097 /* FIXME: The space in domain->mp is wasted */
3098 if (amodule->info.opts & MONO_OPT_SHARED)
3099 /* No need to cache patches */
3100 mono_mempool_destroy (mp);
3101
3102 if (jinfo)
3103 g_free (jinfo);
3104
3105 return NULL;
3106 }
3107
3108 static guint32
3109 find_extra_method_in_amodule (MonoAotModule *amodule, MonoMethod *method, const char *name)
3110 {
3111 guint32 table_size, entry_size, hash;
3112 guint32 *table, *entry;
3113 guint32 index;
3114 static guint32 n_extra_decodes;
3115
3116 if (!amodule || amodule->out_of_date)
3117 return 0xffffff;
3118
3119 table_size = amodule->extra_method_table [0];
3120 table = amodule->extra_method_table + 1;
3121 entry_size = 3;
3122
3123 hash = mono_aot_method_hash (method) % table_size;
3124
3125 entry = &table [hash * entry_size];
3126
3127 if (entry [0] == 0)
3128 return 0xffffff;
3129
3130 index = 0xffffff;
3131 while (TRUE) {
3132 guint32 key = entry [0];
3133 guint32 value = entry [1];
3134 guint32 next = entry [entry_size - 1];
3135 MonoMethod *m;
3136 guint8 *p, *orig_p;
3137
3138 p = amodule->blob + key;
3139 orig_p = p;
3140
3141 mono_aot_lock ();
3142 if (!amodule->method_ref_to_method)
3143 amodule->method_ref_to_method = g_hash_table_new (NULL, NULL);
3144 m = g_hash_table_lookup (amodule->method_ref_to_method, p);
3145 mono_aot_unlock ();
3146 if (!m) {
3147 m = decode_resolve_method_ref_with_target (amodule, method, p, &p);
3148 if (m) {
3149 mono_aot_lock ();
3150 g_hash_table_insert (amodule->method_ref_to_method, orig_p, m);
3151 mono_aot_unlock ();
3152 }
3153 }
3154 if (m == method) {
3155 index = value;
3156 break;
3157 }
3158
3159 /* Special case: wrappers of shared generic methods */
3160 if (m && method->wrapper_type && m->wrapper_type == m->wrapper_type &&
3161 method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED) {
3162 MonoMethod *w1 = mono_marshal_method_from_wrapper (method);
3163 MonoMethod *w2 = mono_marshal_method_from_wrapper (m);
3164
3165 if (w1->is_inflated && ((MonoMethodInflated *)w1)->declaring == w2) {
3166 index = value;
3167 break;
3168 }
3169 }
3170
3171 /* Methods decoded needlessly */
3172 if (m) {
3173 //printf ("%d %s %s %p\n", n_extra_decodes, mono_method_full_name (method, TRUE), mono_method_full_name (m, TRUE), orig_p);
3174 n_extra_decodes ++;
3175 }
3176
3177 if (next != 0)
3178 entry = &table [next * entry_size];
3179 else
3180 break;
3181 }
3182
3183 return index;
3184 }
3185
3186 static void
3187 add_module_cb (gpointer key, gpointer value, gpointer user_data)
3188 {
3189 g_ptr_array_add ((GPtrArray*)user_data, value);
3190 }
3191
3192 /*
3193 * find_extra_method:
3194 *
3195 * Try finding METHOD in the extra_method table in all AOT images.
3196 * Return its method index, or 0xffffff if not found. Set OUT_AMODULE to the AOT
3197 * module where the method was found.
3198 */
3199 static guint32
3200 find_extra_method (MonoMethod *method, MonoAotModule **out_amodule)
3201 {
3202 guint32 index;
3203 GPtrArray *modules;
3204 int i;
3205 char *name = NULL;
3206
3207 if (method->wrapper_type)
3208 name = mono_aot_wrapper_name (method);
3209
3210 /* Try the method's module first */
3211 *out_amodule = method->klass->image->aot_module;
3212 index = find_extra_method_in_amodule (method->klass->image->aot_module, method, name);
3213 if (index != 0xffffff) {
3214 g_free (name);
3215 return index;
3216 }
3217
3218 /*
3219 * Try all other modules.
3220 * This is needed because generic instances klass->image points to the image
3221 * containing the generic definition, but the native code is generated to the
3222 * AOT image which contains the reference.
3223 */
3224
3225 /* Make a copy to avoid doing the search inside the aot lock */
3226 modules = g_ptr_array_new ();
3227 mono_aot_lock ();
3228 g_hash_table_foreach (aot_modules, add_module_cb, modules);
3229 mono_aot_unlock ();
3230
3231 index = 0xffffff;
3232 for (i = 0; i < modules->len; ++i) {
3233 MonoAotModule *amodule = g_ptr_array_index (modules, i);
3234
3235 if (amodule != method->klass->image->aot_module)
3236 index = find_extra_method_in_amodule (amodule, method, name);
3237 if (index != 0xffffff) {
3238 *out_amodule = amodule;
3239 break;
3240 }
3241 }
3242
3243 g_ptr_array_free (modules, TRUE);
3244
3245 g_free (name);
3246 return index;
3247 }
3248
3249 /*
3250 * mono_aot_get_method:
3251 *
3252 * Return a pointer to the AOTed native code for METHOD if it can be found,
3253 * NULL otherwise.
3254 * On platforms with function pointers, this doesn't return a function pointer.
3255 */
3256 gpointer
3257 mono_aot_get_method (MonoDomain *domain, MonoMethod *method)
3258 {
3259 MonoClass *klass = method->klass;
3260 guint32 method_index;
3261 MonoAotModule *amodule = klass->image->aot_module;
3262 guint8 *code;
3263
3264 if (!amodule)
3265 return NULL;
3266
3267 if (amodule->out_of_date)
3268 return NULL;
3269
3270 if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
3271 (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
3272 (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
3273 (method->flags & METHOD_ATTRIBUTE_ABSTRACT))
3274 return NULL;
3275
3276 /*
3277 * Use the original method instead of its invoke-with-check wrapper.
3278 * This is not a problem when using full-aot, since it doesn't support
3279 * remoting.
3280 */
3281 if (mono_aot_only && method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK)
3282 return mono_aot_get_method (domain, mono_marshal_method_from_wrapper (method));
3283
3284 g_assert (klass->inited);
3285
3286 /* Find method index */
3287 if (method->is_inflated && mono_method_is_generic_sharable_impl_full (method, FALSE, FALSE)) {
3288 /*
3289 * For generic methods, we store the fully shared instance in place of the
3290 * original method.
3291 */
3292 method = mono_method_get_declaring_generic_method (method);
3293 method_index = mono_metadata_token_index (method->token) - 1;
3294 } else if (method->is_inflated || !method->token) {
3295 /* This hash table is used to avoid the slower search in the extra_method_table in the AOT image */
3296 mono_aot_lock ();
3297 code = g_hash_table_lookup (amodule->method_to_code, method);
3298 mono_aot_unlock ();
3299 if (code)
3300 return code;
3301
3302 method_index = find_extra_method (method, &amodule);
3303 /*
3304 * Special case the ICollection<T> wrappers for arrays, as they cannot
3305 * be statically enumerated, and each wrapper ends up calling the same
3306 * method in Array.
3307 */
3308 if (method_index == 0xffffff && method->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED && method->klass->rank && strstr (method->name, "System.Collections.Generic")) {
3309 MonoMethod *m = mono_aot_get_array_helper_from_wrapper (method);
3310
3311 code = mono_aot_get_method (domain, m);
3312 if (code) {
3313 if (mono_method_needs_static_rgctx_invoke (m, FALSE)) {
3314 code = mono_create_static_rgctx_trampoline (m, mono_create_ftnptr (domain, code));
3315 /* The call above returns an ftnptr */
3316 code = mono_get_addr_from_ftnptr (code);
3317 }
3318
3319 return code;
3320 }
3321 }
3322
3323 /*
3324 * Special case Array.GetGenericValueImpl which is a generic icall.
3325 * Generic sharing currently can't handle it, but the icall returns data using
3326 * an out parameter, so the managed-to-native wrappers can share the same code.
3327 */
3328 if (method_index == 0xffffff && method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE && method->klass == mono_defaults.array_class && !strcmp (method->name, "GetGenericValueImpl")) {
3329 MonoMethod *m;
3330 MonoGenericContext ctx;
3331 MonoType *args [16];
3332
3333 if (mono_method_signature (method)->params [1]->type == MONO_TYPE_OBJECT)
3334 /* Avoid recursion */
3335 return NULL;
3336
3337 m = mono_class_get_method_from_name (mono_defaults.array_class, "GetGenericValueImpl", 2);
3338 g_assert (m);
3339
3340 memset (&ctx, 0, sizeof (ctx));
3341 args [0] = &mono_defaults.object_class->byval_arg;
3342 ctx.method_inst = mono_metadata_get_generic_inst (1, args);
3343
3344 m = mono_marshal_get_native_wrapper (mono_class_inflate_generic_method (m, &ctx), TRUE, TRUE);
3345
3346 /*
3347 * Get the code for the <object> instantiation which should be emitted into
3348 * the mscorlib aot image by the AOT compiler.
3349 */
3350 code = mono_aot_get_method (domain, m);
3351 if (code)
3352 return code;
3353 }
3354
3355 /* Same for CompareExchange<T> and Exchange<T> */
3356 if (method_index == 0xffffff && method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE && method->klass->image == mono_defaults.corlib && !strcmp (method->klass->name_space, "System.Threading") && !strcmp (method->klass->name, "Interlocked") && (!strcmp (method->name, "CompareExchange") || !strcmp (method->name, "Exchange")) && MONO_TYPE_IS_REFERENCE (mono_method_signature (method)->params [1])) {
3357 MonoMethod *m;
3358 MonoGenericContext ctx;
3359 MonoType *args [16];
3360 gpointer iter = NULL;
3361
3362 while ((m = mono_class_get_methods (method->klass, &iter))) {
3363 if (mono_method_signature (m)->generic_param_count && !strcmp (m->name, method->name))
3364 break;
3365 }
3366 g_assert (m);
3367
3368 memset (&ctx, 0, sizeof (ctx));
3369 args [0] = &mono_defaults.object_class->byval_arg;
3370 ctx.method_inst = mono_metadata_get_generic_inst (1, args);
3371
3372 m = mono_marshal_get_native_wrapper (mono_class_inflate_generic_method (m, &ctx), TRUE, TRUE);
3373
3374 /* Avoid recursion */
3375 if (method == m)
3376 return NULL;
3377
3378 /*
3379 * Get the code for the <object> instantiation which should be emitted into
3380 * the mscorlib aot image by the AOT compiler.
3381 */
3382 code = mono_aot_get_method (domain, m);
3383 if (code)
3384 return code;
3385 }
3386
3387 if (method_index == 0xffffff && method->is_inflated && mono_method_is_generic_sharable_impl_full (method, FALSE, TRUE)) {
3388 /* Partial sharing */
3389 method_index = find_extra_method (mini_get_shared_method (method), &amodule);
3390 }
3391
3392 if (method_index == 0xffffff) {
3393 if (mono_aot_only && mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
3394 char *full_name;
3395
3396 full_name = mono_method_full_name (method, TRUE);
3397 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT NOT FOUND: %s.\n", full_name);
3398 g_free (full_name);
3399 }
3400 return NULL;
3401 }
3402
3403 if (method_index == 0xffffff)
3404 return NULL;
3405
3406 /* Needed by find_jit_info */
3407 mono_aot_lock ();
3408 if (!amodule->extra_methods)
3409 amodule->extra_methods = g_hash_table_new (NULL, NULL);
3410 g_hash_table_insert (amodule->extra_methods, GUINT_TO_POINTER (method_index), method);
3411 mono_aot_unlock ();
3412 } else {
3413 /* Common case */
3414 method_index = mono_metadata_token_index (method->token) - 1;
3415 }
3416
3417 return load_method (domain, amodule, klass->image, method, method->token, method_index);
3418 }
3419
3420 /**
3421 * Same as mono_aot_get_method, but we try to avoid loading any metadata from the
3422 * method.
3423 */
3424 gpointer
3425 mono_aot_get_method_from_token (MonoDomain *domain, MonoImage *image, guint32 token)
3426 {
3427 MonoAotModule *aot_module = image->aot_module;
3428 int method_index;
3429
3430 if (!aot_module)
3431 return NULL;
3432
3433 method_index = mono_metadata_token_index (token) - 1;
3434
3435 return load_method (domain, aot_module, image, NULL, token, method_index);
3436 }
3437
3438 typedef struct {
3439 guint8 *addr;
3440 gboolean res;
3441 } IsGotEntryUserData;
3442
3443 static void
3444 check_is_got_entry (gpointer key, gpointer value, gpointer user_data)
3445 {
3446 IsGotEntryUserData *data = (IsGotEntryUserData*)user_data;
3447 MonoAotModule *aot_module = (MonoAotModule*)value;
3448
3449 if (aot_module->got && (data->addr >= (guint8*)(aot_module->got)) && (data->addr < (guint8*)(aot_module->got + aot_module->info.got_size)))
3450 data->res = TRUE;
3451 }
3452
3453 gboolean
3454 mono_aot_is_got_entry (guint8 *code, guint8 *addr)
3455 {
3456 IsGotEntryUserData user_data;
3457
3458 if (!aot_modules)
3459 return FALSE;
3460
3461 user_data.addr = addr;
3462 user_data.res = FALSE;
3463 mono_aot_lock ();
3464 g_hash_table_foreach (aot_modules, check_is_got_entry, &user_data);
3465 mono_aot_unlock ();
3466
3467 return user_data.res;
3468 }
3469
3470 typedef struct {
3471 guint8 *addr;
3472 MonoAotModule *module;
3473 } FindAotModuleUserData;
3474
3475 static void
3476 find_aot_module_cb (gpointer key, gpointer value, gpointer user_data)
3477 {
3478 FindAotModuleUserData *data = (FindAotModuleUserData*)user_data;
3479 MonoAotModule *aot_module = (MonoAotModule*)value;
3480
3481 if ((data->addr >= (guint8*)(aot_module->code)) && (data->addr < (guint8*)(aot_module->code_end)))
3482 data->module = aot_module;
3483 }
3484
3485 static inline MonoAotModule*
3486 find_aot_module (guint8 *code)
3487 {
3488 FindAotModuleUserData user_data;
3489
3490 if (!aot_modules)
3491 return NULL;
3492
3493 /* Reading these need no locking */
3494 if (((gsize)code < aot_code_low_addr) || ((gsize)code > aot_code_high_addr))
3495 return NULL;
3496
3497 user_data.addr = code;
3498 user_data.module = NULL;
3499
3500 mono_aot_lock ();
3501 g_hash_table_foreach (aot_modules, find_aot_module_cb, &user_data);
3502 mono_aot_unlock ();
3503
3504 return user_data.module;
3505 }
3506
3507 void
3508 mono_aot_patch_plt_entry (guint8 *code, gpointer *got, mgreg_t *regs, guint8 *addr)
3509 {
3510 /*
3511 * Since AOT code is only used in the root domain,
3512 * mono_domain_get () != mono_get_root_domain () means the calling method
3513 * is AppDomain:InvokeInDomain, so this is the same check as in
3514 * mono_method_same_domain () but without loading the metadata for the method.
3515 */
3516 if (mono_domain_get () == mono_get_root_domain ())
3517 mono_arch_patch_plt_entry (code, got, regs, addr);
3518 }
3519
3520 /*
3521 * mono_aot_plt_resolve:
3522 *
3523 * This function is called by the entries in the PLT to resolve the actual method that
3524 * needs to be called. It returns a trampoline to the method and patches the PLT entry.
3525 * Returns NULL if the something cannot be loaded.
3526 */
3527 gpointer
3528 mono_aot_plt_resolve (gpointer aot_module, guint32 plt_info_offset, guint8 *code)
3529 {
3530 #ifdef MONO_ARCH_AOT_SUPPORTED
3531 guint8 *p, *target, *plt_entry;
3532 MonoJumpInfo ji;
3533 MonoAotModule *module = (MonoAotModule*)aot_module;
3534 gboolean res, no_ftnptr = FALSE;
3535 MonoMemPool *mp;
3536
3537 //printf ("DYN: %p %d\n", aot_module, plt_info_offset);
3538
3539 p = &module->blob [plt_info_offset];
3540
3541 ji.type = decode_value (p, &p);
3542
3543 mp = mono_mempool_new_size (512);
3544 res = decode_patch (module, mp, &ji, p, &p);
3545
3546 if (!res) {
3547 mono_mempool_destroy (mp);
3548 return NULL;
3549 }
3550
3551 /*
3552 * Avoid calling resolve_patch_target in the full-aot case if possible, since
3553 * it would create a trampoline, and we don't need that.
3554 * We could do this only if the method does not need the special handling
3555 * in mono_magic_trampoline ().
3556 */
3557 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) &&
3558 !mono_method_needs_static_rgctx_invoke (ji.data.method, FALSE)) {
3559 target = mono_jit_compile_method (ji.data.method);
3560 no_ftnptr = TRUE;
3561 } else {
3562 target = mono_resolve_patch_target (NULL, mono_domain_get (), NULL, &ji, TRUE);
3563 }
3564
3565 /*
3566 * The trampoline expects us to return a function descriptor on platforms which use
3567 * it, but resolve_patch_target returns a direct function pointer for some type of
3568 * patches, so have to translate between the two.
3569 * FIXME: Clean this up, but how ?
3570 */
3571 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) {
3572 /* These should already have a function descriptor */
3573 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
3574 /* Our function descriptors have a 0 environment, gcc created ones don't */
3575 if (ji.type != MONO_PATCH_INFO_INTERNAL_METHOD && ji.type != MONO_PATCH_INFO_JIT_ICALL_ADDR && ji.type != MONO_PATCH_INFO_ICALL_ADDR)
3576 g_assert (((gpointer*)target) [2] == 0);
3577 #endif
3578 /* Empty */
3579 } else if (!no_ftnptr) {
3580 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
3581 g_assert (((gpointer*)target) [2] != 0);
3582 #endif
3583 target = mono_create_ftnptr (mono_domain_get (), target);
3584 }
3585
3586 mono_mempool_destroy (mp);
3587
3588 /* Patch the PLT entry with target which might be the actual method not a trampoline */
3589 plt_entry = mono_aot_get_plt_entry (code);
3590 g_assert (plt_entry);
3591 mono_aot_patch_plt_entry (plt_entry, module->got, NULL, target);
3592
3593 return target;
3594 #else
3595 g_assert_not_reached ();
3596 return NULL;
3597 #endif
3598 }
3599
3600 /**
3601 * init_plt:
3602 *
3603 * Initialize the PLT table of the AOT module. Called lazily when the first AOT
3604 * method in the module is loaded to avoid committing memory by writing to it.
3605 * LOCKING: Assumes the AOT lock is held.
3606 */
3607 static void
3608 init_plt (MonoAotModule *amodule)
3609 {
3610 int i;
3611 gpointer tramp;
3612
3613 if (amodule->plt_inited)
3614 return;
3615
3616 tramp = mono_create_specific_trampoline (amodule, MONO_TRAMPOLINE_AOT_PLT, mono_get_root_domain (), NULL);
3617
3618 /*
3619 * Initialize the PLT entries in the GOT to point to the default targets.
3620 */
3621
3622 tramp = mono_create_ftnptr (mono_domain_get (), tramp);
3623 for (i = 1; i < amodule->info.plt_size; ++i)
3624 /* All the default entries point to the AOT trampoline */
3625 ((gpointer*)amodule->got)[amodule->info.plt_got_offset_base + i] = tramp;
3626
3627 amodule->plt_inited = TRUE;
3628 }
3629
3630 /*
3631 * mono_aot_get_plt_entry:
3632 *
3633 * Return the address of the PLT entry called by the code at CODE if exists.
3634 */
3635 guint8*
3636 mono_aot_get_plt_entry (guint8 *code)
3637 {
3638 MonoAotModule *amodule = find_aot_module (code);
3639 guint8 *target = NULL;
3640
3641 if (!amodule)
3642 return NULL;
3643
3644 #ifdef TARGET_ARM
3645 if (amodule->thumb_end && code < amodule->thumb_end) {
3646 return mono_arm_get_thumb_plt_entry (code);
3647 }
3648 #endif
3649
3650 #ifdef MONO_ARCH_AOT_SUPPORTED
3651 target = mono_arch_get_call_target (code);
3652 #else
3653 g_assert_not_reached ();
3654 #endif
3655
3656 if ((target >= (guint8*)(amodule->plt)) && (target < (guint8*)(amodule->plt_end)))
3657 return target;
3658 else
3659 return NULL;
3660 }
3661
3662 /*
3663 * mono_aot_get_plt_info_offset:
3664 *
3665 * Return the PLT info offset belonging to the plt entry called by CODE.
3666 */
3667 guint32
3668 mono_aot_get_plt_info_offset (mgreg_t *regs, guint8 *code)
3669 {
3670 guint8 *plt_entry = mono_aot_get_plt_entry (code);
3671
3672 g_assert (plt_entry);
3673
3674 /* The offset is embedded inside the code after the plt entry */
3675 #ifdef MONO_ARCH_AOT_SUPPORTED
3676 return mono_arch_get_plt_info_offset (plt_entry, regs, code);
3677 #else
3678 g_assert_not_reached ();
3679 return 0;
3680 #endif
3681 }
3682
3683 static gpointer
3684 mono_create_ftnptr_malloc (guint8 *code)
3685 {
3686 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
3687 MonoPPCFunctionDescriptor *ftnptr = g_malloc0 (sizeof (MonoPPCFunctionDescriptor));
3688
3689 ftnptr->code = code;
3690 ftnptr->toc = NULL;
3691 ftnptr->env = NULL;
3692
3693 return ftnptr;
3694 #else
3695 return code;
3696 #endif
3697 }
3698
3699 /*
3700 * mono_aot_register_jit_icall:
3701 *
3702 * Register a JIT icall which is called by trampolines in full-aot mode. This should
3703 * be called from mono_arch_init () during startup.
3704 */
3705 void
3706 mono_aot_register_jit_icall (const char *name, gpointer addr)
3707 {
3708 /* No need for locking */
3709 if (!aot_jit_icall_hash)
3710 aot_jit_icall_hash = g_hash_table_new (g_str_hash, g_str_equal);
3711 g_hash_table_insert (aot_jit_icall_hash, (char*)name, addr);
3712 }
3713
3714 /*
3715 * load_function:
3716 *
3717 * Load the function named NAME from the aot image.
3718 */
3719 static gpointer
3720 load_function (MonoAotModule *amodule, const char *name)
3721 {
3722 char *symbol;
3723 guint8 *p;
3724 int n_patches, pindex;
3725 MonoMemPool *mp;
3726 gpointer code;
3727
3728 /* Load the code */
3729
3730 symbol = g_strdup_printf ("%s", name);
3731 find_symbol (amodule->sofile, amodule->globals, symbol, (gpointer *)&code);
3732 g_free (symbol);
3733 if (!code)
3734 g_error ("Symbol '%s' not found in AOT file '%s'.\n", name, amodule->aot_name);
3735
3736 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT FOUND function '%s' in AOT file '%s'.\n", name, amodule->aot_name);
3737
3738 /* Load info */
3739
3740 symbol = g_strdup_printf ("%s_p", name);
3741 find_symbol (amodule->sofile, amodule->globals, symbol, (gpointer *)&p);
3742 g_free (symbol);
3743 if (!p)
3744 /* Nothing to patch */
3745 return code;
3746
3747 p = amodule->blob + *(guint32*)p;
3748
3749 /* Similar to mono_aot_load_method () */
3750
3751 n_patches = decode_value (p, &p);
3752
3753 if (n_patches) {
3754 MonoJumpInfo *patches;
3755 guint32 *got_slots;
3756
3757 mp = mono_mempool_new ();
3758
3759 patches = load_patch_info (amodule, mp, n_patches, &got_slots, p, &p);
3760 g_assert (patches);
3761
3762 for (pindex = 0; pindex < n_patches; ++pindex) {
3763 MonoJumpInfo *ji = &patches [pindex];
3764 gpointer target;
3765
3766 if (amodule->got [got_slots [pindex]])
3767 continue;
3768
3769 /*
3770 * When this code is executed, the runtime may not be initalized yet, so
3771 * resolve the patch info by hand.
3772 */
3773 if (ji->type == MONO_PATCH_INFO_JIT_ICALL_ADDR) {
3774 if (!strcmp (ji->data.name, "mono_get_lmf_addr")) {
3775 target = mono_get_lmf_addr;
3776 } else if (!strcmp (ji->data.name, "mono_thread_force_interruption_checkpoint")) {
3777 target = mono_thread_force_interruption_checkpoint;
3778 } else if (!strcmp (ji->data.name, "mono_exception_from_token")) {
3779 target = mono_exception_from_token;
3780 } else if (!strcmp (ji->data.name, "mono_throw_exception")) {
3781 target = mono_get_throw_exception ();
3782 } else if (strstr (ji->data.name, "trampoline_func_") == ji->data.name) {
3783 int tramp_type2 = atoi (ji->data.name + strlen ("trampoline_func_"));
3784 target = (gpointer)mono_get_trampoline_func (tramp_type2);
3785 } else if (strstr (ji->data.name, "specific_trampoline_lazy_fetch_") == ji->data.name) {
3786 /* atoll is needed because the the offset is unsigned */
3787 guint32 slot;
3788 int res;
3789
3790 res = sscanf (ji->data.name, "specific_trampoline_lazy_fetch_%u", &slot);
3791 g_assert (res == 1);
3792 target = mono_create_specific_trampoline (GUINT_TO_POINTER (slot), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), NULL);
3793 target = mono_create_ftnptr_malloc (target);
3794 } else if (!strcmp (ji->data.name, "specific_trampoline_monitor_enter")) {
3795 target = mono_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_ENTER, mono_get_root_domain (), NULL);
3796 target = mono_create_ftnptr_malloc (target);
3797 } else if (!strcmp (ji->data.name, "specific_trampoline_monitor_exit")) {
3798 target = mono_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_EXIT, mono_get_root_domain (), NULL);
3799 target = mono_create_ftnptr_malloc (target);
3800 } else if (!strcmp (ji->data.name, "specific_trampoline_generic_class_init")) {
3801 target = mono_create_specific_trampoline (NULL, MONO_TRAMPOLINE_GENERIC_CLASS_INIT, mono_get_root_domain (), NULL);
3802 target = mono_create_ftnptr_malloc (target);
3803 } else if (!strcmp (ji->data.name, "mono_thread_get_and_clear_pending_exception")) {
3804 target = mono_thread_get_and_clear_pending_exception;
3805 } else if (strstr (ji->data.name, "generic_trampoline_")) {
3806 target = mono_aot_get_trampoline (ji->data.name);
3807 } else if (aot_jit_icall_hash && g_hash_table_lookup (aot_jit_icall_hash, ji->data.name)) {
3808 /* Registered by mono_arch_init () */
3809 target = g_hash_table_lookup (aot_jit_icall_hash, ji->data.name);
3810 } else {
3811 fprintf (stderr, "Unknown relocation '%s'\n", ji->data.name);
3812 g_assert_not_reached ();
3813 target = NULL;
3814 }
3815 } else {
3816 /* Hopefully the code doesn't have patches which need method or
3817 * domain to be set.
3818 */
3819 target = mono_resolve_patch_target (NULL, NULL, code, ji, FALSE);
3820 g_assert (target);
3821 }
3822
3823 amodule->got [got_slots [pindex]] = target;
3824 }
3825
3826 g_free (got_slots);
3827
3828 mono_mempool_destroy (mp);
3829 }
3830
3831 return code;
3832 }
3833
3834 /*
3835 * Return the trampoline identified by NAME from the mscorlib AOT file.
3836 * On ppc64, this returns a function descriptor.
3837 */
3838 gpointer
3839 mono_aot_get_trampoline (const char *name)
3840 {
3841 MonoImage *image;
3842 MonoAotModule *amodule;
3843
3844 image = mono_defaults.corlib;
3845 g_assert (image);
3846
3847 amodule = image->aot_module;
3848 g_assert (amodule);
3849
3850 return mono_create_ftnptr_malloc (load_function (amodule, name));
3851 }
3852
3853 /* Return a given kind of trampoline */
3854 static gpointer
3855 get_numerous_trampoline (MonoAotTrampoline tramp_type, int n_got_slots, MonoAotModule **out_amodule, guint32 *got_offset, guint32 *out_tramp_size)
3856 {
3857 MonoAotModule *amodule;
3858 int index, tramp_size;
3859 MonoImage *image;
3860
3861 /* Currently, we keep all trampolines in the mscorlib AOT image */
3862 image = mono_defaults.corlib;
3863 g_assert (image);
3864
3865 mono_aot_lock ();
3866
3867 amodule = image->aot_module;
3868 g_assert (amodule);
3869
3870 *out_amodule = amodule;
3871
3872 if (amodule->trampoline_index [tramp_type] == amodule->info.num_trampolines [tramp_type])
3873 g_error ("Ran out of trampolines of type %d in '%s' (%d)\n", tramp_type, image->name, amodule->info.num_trampolines [tramp_type]);
3874
3875 index = amodule->trampoline_index [tramp_type] ++;
3876
3877 mono_aot_unlock ();
3878
3879 *got_offset = amodule->info.trampoline_got_offset_base [tramp_type] + (index * n_got_slots);
3880
3881 tramp_size = amodule->info.trampoline_size [tramp_type];
3882
3883 if (out_tramp_size)
3884 *out_tramp_size = tramp_size;
3885
3886 return amodule->trampolines [tramp_type] + (index * tramp_size);
3887 }
3888
3889 /*
3890 * Return a specific trampoline from the AOT file.
3891 */
3892 gpointer
3893 mono_aot_create_specific_trampoline (MonoImage *image, gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
3894 {
3895 MonoAotModule *amodule;
3896 guint32 got_offset, tramp_size;
3897 guint8 *code, *tramp;
3898 static gpointer generic_trampolines [MONO_TRAMPOLINE_NUM];
3899 static gboolean inited;
3900 static guint32 num_trampolines;
3901
3902 if (!inited) {
3903 mono_aot_lock ();
3904
3905 if (!inited) {
3906 mono_counters_register ("Specific trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &num_trampolines);
3907 inited = TRUE;
3908 }
3909
3910 mono_aot_unlock ();
3911 }
3912
3913 num_trampolines ++;
3914
3915 if (!generic_trampolines [tramp_type]) {
3916 char *symbol;
3917
3918 symbol = mono_get_generic_trampoline_name (tramp_type);
3919 generic_trampolines [tramp_type] = mono_aot_get_trampoline (symbol);
3920 g_free (symbol);
3921 }
3922
3923 tramp = generic_trampolines [tramp_type];
3924 g_assert (tramp);
3925
3926 code = get_numerous_trampoline (MONO_AOT_TRAMP_SPECIFIC, 2, &amodule, &got_offset, &tramp_size);
3927
3928 amodule->got [got_offset] = tramp;
3929 amodule->got [got_offset + 1] = arg1;
3930
3931 if (code_len)
3932 *code_len = tramp_size;
3933
3934 return code;
3935 }
3936
3937 gpointer
3938 mono_aot_get_static_rgctx_trampoline (gpointer ctx, gpointer addr)
3939 {
3940 MonoAotModule *amodule;
3941 guint8 *code;
3942 guint32 got_offset;
3943
3944 code = get_numerous_trampoline (MONO_AOT_TRAMP_STATIC_RGCTX, 2, &amodule, &got_offset, NULL);
3945
3946 amodule->got [got_offset] = ctx;
3947 amodule->got [got_offset + 1] = addr;
3948
3949 /* The caller expects an ftnptr */
3950 return mono_create_ftnptr (mono_domain_get (), code);
3951 }
3952
3953 gpointer
3954 mono_aot_get_unbox_trampoline (MonoMethod *method)
3955 {
3956 guint32 method_index = mono_metadata_token_index (method->token) - 1;
3957 MonoAotModule *amodule;
3958 gpointer code;
3959 guint32 *ut, *ut_end, *entry;
3960 int low, high, entry_index;
3961
3962 if (method->is_inflated && !mono_method_is_generic_sharable_impl (method, FALSE)) {
3963 method_index = find_extra_method (method, &amodule);
3964 g_assert (method_index != 0xffffff);
3965 } else {
3966 amodule = method->klass->image->aot_module;
3967 g_assert (amodule);
3968 }
3969
3970 ut = amodule->unbox_trampolines;
3971 ut_end = amodule->unbox_trampolines_end;
3972
3973 /* Do a binary search in the sorted table */
3974 code = NULL;
3975 low = 0;
3976 high = (ut_end - ut) / 2;
3977 while (low < high) {
3978 entry_index = (low + high) / 2;
3979 entry = &ut [(entry_index * 2)];
3980 if (entry [0] < method_index) {
3981 low = entry_index + 1;
3982 } else if (entry [0] > method_index) {
3983 high = entry_index;
3984 } else {
3985 code = amodule->code + entry [1];
3986 break;
3987 }
3988 }
3989 g_assert (code);
3990
3991 /* The caller expects an ftnptr */
3992 return mono_create_ftnptr (mono_domain_get (), code);
3993 }
3994
3995 gpointer
3996 mono_aot_get_lazy_fetch_trampoline (guint32 slot)
3997 {
3998 char *symbol;
3999 gpointer code;
4000
4001 symbol = mono_get_rgctx_fetch_trampoline_name (slot);
4002 code = load_function (mono_defaults.corlib->aot_module, symbol);
4003 g_free (symbol);
4004 /* The caller expects an ftnptr */
4005 return mono_create_ftnptr (mono_domain_get (), code);
4006 }
4007
4008 gpointer
4009 mono_aot_get_imt_thunk (MonoVTable *vtable, MonoDomain *domain, MonoIMTCheckItem **imt_entries, int count, gpointer fail_tramp)
4010 {
4011 guint32 got_offset;
4012 gpointer code;
4013 gpointer *buf;
4014 int i, index, real_count;
4015 MonoAotModule *amodule;
4016
4017 code = get_numerous_trampoline (MONO_AOT_TRAMP_IMT_THUNK, 1, &amodule, &got_offset, NULL);
4018
4019 real_count = 0;
4020 for (i = 0; i < count; ++i) {
4021 MonoIMTCheckItem *item = imt_entries [i];
4022
4023 if (item->is_equals)
4024 real_count ++;
4025 }
4026
4027 /* Save the entries into an array */
4028 buf = mono_domain_alloc (domain, (real_count + 1) * 2 * sizeof (gpointer));
4029 index = 0;
4030 for (i = 0; i < count; ++i) {
4031 MonoIMTCheckItem *item = imt_entries [i];
4032
4033 if (!item->is_equals)
4034 continue;
4035
4036 g_assert (item->key);
4037
4038 buf [(index * 2)] = item->key;
4039 if (item->has_target_code) {
4040 gpointer *p = mono_domain_alloc (domain, sizeof (gpointer));
4041 *p = item->value.target_code;
4042 buf [(index * 2) + 1] = p;
4043 } else {
4044 buf [(index * 2) + 1] = &(vtable->vtable [item->value.vtable_slot]);
4045 }
4046 index ++;
4047 }
4048 buf [(index * 2)] = NULL;
4049 buf [(index * 2) + 1] = fail_tramp;
4050
4051 amodule->got [got_offset] = buf;
4052
4053 return code;
4054 }
4055
4056 /*
4057 * mono_aot_set_make_unreadable:
4058 *
4059 * Set whenever to make all mmaped memory unreadable. In conjuction with a
4060 * SIGSEGV handler, this is useful to find out which pages the runtime tries to read.
4061 */
4062 void
4063 mono_aot_set_make_unreadable (gboolean unreadable)
4064 {
4065 static int inited;
4066
4067 make_unreadable = unreadable;
4068
4069 if (make_unreadable && !inited) {
4070 mono_counters_register ("AOT pagefaults", MONO_COUNTER_JIT | MONO_COUNTER_INT, &n_pagefaults);
4071 }
4072 }
4073
4074 typedef struct {
4075 MonoAotModule *module;
4076 guint8 *ptr;
4077 } FindMapUserData;
4078
4079 static void
4080 find_map (gpointer key, gpointer value, gpointer user_data)
4081 {
4082 MonoAotModule *module = (MonoAotModule*)value;
4083 FindMapUserData *data = (FindMapUserData*)user_data;
4084
4085 if (!data->module)
4086 if ((data->ptr >= module->mem_begin) && (data->ptr < module->mem_end))
4087 data->module = module;
4088 }
4089
4090 static MonoAotModule*
4091 find_module_for_addr (void *ptr)
4092 {
4093 FindMapUserData data;
4094
4095 if (!make_unreadable)
4096 return NULL;
4097
4098 data.module = NULL;
4099 data.ptr = (guint8*)ptr;
4100
4101 mono_aot_lock ();
4102 g_hash_table_foreach (aot_modules, (GHFunc)find_map, &data);
4103 mono_aot_unlock ();
4104
4105 return data.module;
4106 }
4107
4108 /*
4109 * mono_aot_is_pagefault:
4110 *
4111 * Should be called from a SIGSEGV signal handler to find out whenever @ptr is
4112 * within memory allocated by this module.
4113 */
4114 gboolean
4115 mono_aot_is_pagefault (void *ptr)
4116 {
4117 if (!make_unreadable)
4118 return FALSE;
4119
4120 /*
4121 * Not signal safe, but SIGSEGV's are synchronous, and
4122 * this is only turned on by a MONO_DEBUG option.
4123 */
4124 return find_module_for_addr (ptr) != NULL;
4125 }
4126
4127 /*
4128 * mono_aot_handle_pagefault:
4129 *
4130 * Handle a pagefault caused by an unreadable page by making it readable again.
4131 */
4132 void
4133 mono_aot_handle_pagefault (void *ptr)
4134 {
4135 #ifndef PLATFORM_WIN32
4136 guint8* start = (guint8*)ROUND_DOWN (((gssize)ptr), mono_pagesize ());
4137 int res;
4138
4139 mono_aot_lock ();
4140 res = mono_mprotect (start, mono_pagesize (), MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_EXEC);
4141 g_assert (res == 0);
4142
4143 n_pagefaults ++;
4144 mono_aot_unlock ();
4145 #endif
4146 }
4147
4148 #else
4149 /* AOT disabled */
4150
4151 void
4152 mono_aot_init (void)
4153 {
4154 }
4155
4156 gpointer
4157 mono_aot_get_method (MonoDomain *domain, MonoMethod *method)
4158 {
4159 return NULL;
4160 }
4161
4162 gboolean
4163 mono_aot_is_got_entry (guint8 *code, guint8 *addr)
4164 {
4165 return FALSE;
4166 }
4167
4168 gboolean
4169 mono_aot_get_cached_class_info (MonoClass *klass, MonoCachedClassInfo *res)
4170 {
4171 return FALSE;
4172 }
4173
4174 gboolean
4175 mono_aot_get_class_from_name (MonoImage *image, const char *name_space, const char *name, MonoClass **klass)
4176 {
4177 return FALSE;
4178 }
4179
4180 MonoJitInfo *
4181 mono_aot_find_jit_info (MonoDomain *domain, MonoImage *image, gpointer addr)
4182 {
4183 return NULL;
4184 }
4185
4186 gpointer
4187 mono_aot_get_method_from_token (MonoDomain *domain, MonoImage *image, guint32 token)
4188 {
4189 return NULL;
4190 }
4191
4192 guint8*
4193 mono_aot_get_plt_entry (guint8 *code)
4194 {
4195 return NULL;
4196 }
4197
4198 gpointer
4199 mono_aot_plt_resolve (gpointer aot_module, guint32 plt_info_offset, guint8 *code)
4200 {
4201 return NULL;
4202 }
4203
4204 void
4205 mono_aot_patch_plt_entry (guint8 *code, gpointer *got, mgreg_t *regs, guint8 *addr)
4206 {
4207 }
4208
4209 gpointer
4210 mono_aot_get_method_from_vt_slot (MonoDomain *domain, MonoVTable *vtable, int slot)
4211 {
4212 return NULL;
4213 }
4214
4215 guint32
4216 mono_aot_get_plt_info_offset (mgreg_t *regs, guint8 *code)
4217 {
4218 g_assert_not_reached ();
4219
4220 return 0;
4221 }
4222
4223 gpointer
4224 mono_aot_create_specific_trampoline (MonoImage *image, gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
4225 {
4226 g_assert_not_reached ();
4227 return NULL;
4228 }
4229
4230 gpointer
4231 mono_aot_get_static_rgctx_trampoline (gpointer ctx, gpointer addr)
4232 {
4233 g_assert_not_reached ();
4234 return NULL;
4235 }
4236
4237 gpointer
4238 mono_aot_get_trampoline (const char *name)
4239 {
4240 g_assert_not_reached ();
4241 return NULL;
4242 }
4243
4244 gpointer
4245 mono_aot_get_unbox_trampoline (MonoMethod *method)
4246 {
4247 g_assert_not_reached ();
4248 return NULL;
4249 }
4250
4251 gpointer
4252 mono_aot_get_lazy_fetch_trampoline (guint32 slot)
4253 {
4254 g_assert_not_reached ();
4255 return NULL;
4256 }
4257
4258 gpointer
4259 mono_aot_get_imt_thunk (MonoVTable *vtable, MonoDomain *domain, MonoIMTCheckItem **imt_entries, int count, gpointer fail_tramp)
4260 {
4261 g_assert_not_reached ();
4262 return NULL;
4263 }
4264
4265 guint8*
4266 mono_aot_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
4267 {
4268 g_assert_not_reached ();
4269 return NULL;
4270 }
4271
4272 void
4273 mono_aot_register_jit_icall (const char *name, gpointer addr)
4274 {
4275 }
4276
4277 #endif
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