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Make sure x86 ATOMIC_CAS doesn't overwrite its own operands.
[mono-debugger.git] / mono / mini / aot-compiler.c
blob1c38f55843d73b01a5bf8724571f52e6d3cb5357
1 /*
2 * aot-compiler.c: mono Ahead of Time compiler
3 *
4 * Author:
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Zoltan Varga (vargaz@gmail.com)
7 *
8 * (C) 2002 Ximian, Inc.
9 */
10
11 /* Remaining AOT-only work:
12 * - reduce the length of the wrapper names.
13 * - aot IMT tables, so we don't have two kinds of aot code.
14 * - optimize the trampolines, generate more code in the arch files.
15 * - make things more consistent with how elf works, for example, use ELF
16 * relocations.
17 * Remaining generics sharing work:
18 * - optimize the size of the data which is encoded.
19 * - optimize the runtime loading of data:
20 * - the trampoline code calls mono_jit_info_table_find () to find the rgctx,
21 * which loads the debugging+exception handling info for the method. This is a
22 * huge waste of time and code, since the rgctx structure is currently empty.
23 * - every shared method has a MonoGenericJitInfo structure which is only really
24 * used for handling catch clauses with open types, not a very common use case.
25 */
26
27 #include "config.h"
28 #include <sys/types.h>
29 #ifdef HAVE_UNISTD_H
30 #include <unistd.h>
31 #endif
32 #ifdef HAVE_STDINT_H
33 #include <stdint.h>
34 #endif
35 #include <fcntl.h>
36 #include <ctype.h>
37 #include <string.h>
38 #ifndef PLATFORM_WIN32
39 #include <sys/time.h>
40 #else
41 #include <winsock2.h>
42 #include <windows.h>
43 #endif
44
45 #include <errno.h>
46 #include <sys/stat.h>
47 #include <limits.h> /* for PAGESIZE */
48 #ifndef PAGESIZE
49 #define PAGESIZE 4096
50 #endif
51
52 #include <mono/metadata/tabledefs.h>
53 #include <mono/metadata/class.h>
54 #include <mono/metadata/object.h>
55 #include <mono/metadata/tokentype.h>
56 #include <mono/metadata/appdomain.h>
57 #include <mono/metadata/debug-helpers.h>
58 #include <mono/metadata/assembly.h>
59 #include <mono/metadata/metadata-internals.h>
60 #include <mono/metadata/marshal.h>
61 #include <mono/metadata/gc-internal.h>
62 #include <mono/metadata/monitor.h>
63 #include <mono/metadata/mempool-internals.h>
64 #include <mono/metadata/mono-endian.h>
65 #include <mono/utils/mono-logger.h>
66 #include <mono/utils/mono-compiler.h>
67 #include <mono/utils/mono-time.h>
68
69 #include "mini.h"
70 #include "image-writer.h"
71 #include "dwarfwriter.h"
72
73 #ifndef DISABLE_AOT
74
75 #define TV_DECLARE(name) gint64 name
76 #define TV_GETTIME(tv) tv = mono_100ns_ticks ()
77 #define TV_ELAPSED(start,end) (((end) - (start)) / 10)
78
79 #ifdef PLATFORM_WIN32
80 #define SHARED_EXT ".dll"
81 #elif defined(__ppc__) && defined(__MACH__)
82 #define SHARED_EXT ".dylib"
83 #else
84 #define SHARED_EXT ".so"
85 #endif
86
87 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
88 #define ALIGN_PTR_TO(ptr,align) (gpointer)((((gssize)(ptr)) + (align - 1)) & (~(align - 1)))
89 #define ROUND_DOWN(VALUE,SIZE) ((VALUE) & ~((SIZE) - 1))
90
91 typedef struct MonoAotOptions {
92 char *outfile;
93 gboolean save_temps;
94 gboolean write_symbols;
95 gboolean metadata_only;
96 gboolean bind_to_runtime_version;
97 gboolean full_aot;
98 gboolean no_dlsym;
99 gboolean static_link;
100 gboolean asm_only;
101 gboolean asm_writer;
102 int nthreads;
103 gboolean print_skipped_methods;
104 } MonoAotOptions;
105
106 typedef struct MonoAotStats {
107 int ccount, mcount, lmfcount, abscount, gcount, ocount, genericcount;
108 int code_size, info_size, ex_info_size, got_size, class_info_size, got_info_size, got_info_offsets_size;
109 int methods_without_got_slots, direct_calls, all_calls;
110 int got_slots;
111 int got_slot_types [MONO_PATCH_INFO_NONE];
112 int jit_time, gen_time, link_time;
113 } MonoAotStats;
114
115 typedef struct MonoAotCompile {
116 MonoImage *image;
117 GPtrArray *methods;
118 GHashTable *method_indexes;
119 MonoCompile **cfgs;
120 int cfgs_size;
121 GHashTable *patch_to_plt_offset;
122 GHashTable *plt_offset_to_patch;
123 GHashTable *patch_to_shared_got_offset;
124 GPtrArray *shared_patches;
125 GHashTable *image_hash;
126 GHashTable *method_to_cfg;
127 GHashTable *token_info_hash;
128 GPtrArray *extra_methods;
129 GPtrArray *image_table;
130 GPtrArray *globals;
131 GList *method_order;
132 guint32 *plt_got_info_offsets;
133 /* Number of trampolines emitted into the AOT file */
134 guint32 num_aot_trampolines;
135 guint32 got_offset, plt_offset, plt_got_offset_base;
136 /* Number of GOT entries reserved for trampolines */
137 guint32 num_trampoline_got_entries;
138 guint32 trampoline_got_offset_base;
139 guint32 specific_trampoline_size;
140 MonoAotOptions aot_opts;
141 guint32 nmethods;
142 guint32 opts;
143 MonoMemPool *mempool;
144 MonoAotStats stats;
145 int method_index;
146 char *static_linking_symbol;
147 CRITICAL_SECTION mutex;
148 gboolean use_bin_writer;
149 MonoImageWriter *w;
150 MonoDwarfWriter *dwarf;
151 FILE *fp;
152 char *tmpfname;
153 GSList *cie_program;
154 } MonoAotCompile;
155
156 #define mono_acfg_lock(acfg) EnterCriticalSection (&((acfg)->mutex))
157 #define mono_acfg_unlock(acfg) LeaveCriticalSection (&((acfg)->mutex))
158
159 #ifdef HAVE_ARRAY_ELEM_INIT
160 #define MSGSTRFIELD(line) MSGSTRFIELD1(line)
161 #define MSGSTRFIELD1(line) str##line
162 static const struct msgstr_t {
163 #define PATCH_INFO(a,b) char MSGSTRFIELD(__LINE__) [sizeof (b)];
164 #include "patch-info.h"
165 #undef PATCH_INFO
166 } opstr = {
167 #define PATCH_INFO(a,b) b,
168 #include "patch-info.h"
169 #undef PATCH_INFO
170 };
171 static const gint16 opidx [] = {
172 #define PATCH_INFO(a,b) [MONO_PATCH_INFO_ ## a] = offsetof (struct msgstr_t, MSGSTRFIELD(__LINE__)),
173 #include "patch-info.h"
174 #undef PATCH_INFO
175 };
176
177 static const char*
178 get_patch_name (int info)
179 {
180 return (const char*)&opstr + opidx [info];
181 }
182
183 #else
184 #define PATCH_INFO(a,b) b,
185 static const char* const
186 patch_types [MONO_PATCH_INFO_NUM + 1] = {
187 #include "patch-info.h"
188 NULL
189 };
190
191 static const char*
192 get_patch_name (int info)
193 {
194 return patch_types [info];
195 }
196
197 #endif
198
199 static void
200 emit_global (MonoAotCompile *acfg, const char *name, gboolean func);
201
202 /* Wrappers around the image writer functions */
203
204 static inline void
205 emit_section_change (MonoAotCompile *acfg, const char *section_name, int subsection_index)
206 {
207 img_writer_emit_section_change (acfg->w, section_name, subsection_index);
208 }
209
210 static inline void
211 emit_push_section (MonoAotCompile *acfg, const char *section_name, int subsection)
212 {
213 img_writer_emit_push_section (acfg->w, section_name, subsection);
214 }
215
216 static inline void
217 emit_pop_section (MonoAotCompile *acfg)
218 {
219 img_writer_emit_pop_section (acfg->w);
220 }
221
222 static inline void
223 emit_local_symbol (MonoAotCompile *acfg, const char *name, const char *end_label, gboolean func)
224 {
225 img_writer_emit_local_symbol (acfg->w, name, end_label, func);
226 }
227
228 static inline void
229 emit_label (MonoAotCompile *acfg, const char *name)
230 {
231 img_writer_emit_label (acfg->w, name);
232 }
233
234 static inline void
235 emit_bytes (MonoAotCompile *acfg, const guint8* buf, int size)
236 {
237 img_writer_emit_bytes (acfg->w, buf, size);
238 }
239
240 static inline void
241 emit_string (MonoAotCompile *acfg, const char *value)
242 {
243 img_writer_emit_string (acfg->w, value);
244 }
245
246 static inline void
247 emit_line (MonoAotCompile *acfg)
248 {
249 img_writer_emit_line (acfg->w);
250 }
251
252 static inline void
253 emit_alignment (MonoAotCompile *acfg, int size)
254 {
255 img_writer_emit_alignment (acfg->w, size);
256 }
257
258 static inline void
259 emit_pointer_unaligned (MonoAotCompile *acfg, const char *target)
260 {
261 img_writer_emit_pointer_unaligned (acfg->w, target);
262 }
263
264 static inline void
265 emit_pointer (MonoAotCompile *acfg, const char *target)
266 {
267 img_writer_emit_pointer (acfg->w, target);
268 }
269
270 static inline void
271 emit_int16 (MonoAotCompile *acfg, int value)
272 {
273 img_writer_emit_int16 (acfg->w, value);
274 }
275
276 static inline void
277 emit_int32 (MonoAotCompile *acfg, int value)
278 {
279 img_writer_emit_int32 (acfg->w, value);
280 }
281
282 static inline void
283 emit_symbol_diff (MonoAotCompile *acfg, const char *end, const char* start, int offset)
284 {
285 img_writer_emit_symbol_diff (acfg->w, end, start, offset);
286 }
287
288 static inline void
289 emit_zero_bytes (MonoAotCompile *acfg, int num)
290 {
291 img_writer_emit_zero_bytes (acfg->w, num);
292 }
293
294 static inline void
295 emit_byte (MonoAotCompile *acfg, guint8 val)
296 {
297 img_writer_emit_byte (acfg->w, val);
298 }
299
300 static G_GNUC_UNUSED void
301 emit_global_inner (MonoAotCompile *acfg, const char *name, gboolean func)
302 {
303 img_writer_emit_global (acfg->w, name, func);
304 }
305
306 static void
307 emit_global (MonoAotCompile *acfg, const char *name, gboolean func)
308 {
309 if (acfg->aot_opts.no_dlsym) {
310 g_ptr_array_add (acfg->globals, g_strdup (name));
311 } else {
312 img_writer_emit_global (acfg->w, name, func);
313 }
314 }
315
316 static void
317 emit_string_symbol (MonoAotCompile *acfg, const char *name, const char *value)
318 {
319 img_writer_emit_section_change (acfg->w, ".text", 1);
320 emit_global (acfg, name, FALSE);
321 img_writer_emit_label (acfg->w, name);
322 img_writer_emit_string (acfg->w, value);
323 }
324
325 static G_GNUC_UNUSED void
326 emit_uleb128 (MonoAotCompile *acfg, guint32 value)
327 {
328 do {
329 guint8 b = value & 0x7f;
330 value >>= 7;
331 if (value != 0) /* more bytes to come */
332 b |= 0x80;
333 emit_byte (acfg, b);
334 } while (value);
335 }
336
337 static G_GNUC_UNUSED void
338 emit_sleb128 (MonoAotCompile *acfg, gint64 value)
339 {
340 gboolean more = 1;
341 gboolean negative = (value < 0);
342 guint32 size = 64;
343 guint8 byte;
344
345 while (more) {
346 byte = value & 0x7f;
347 value >>= 7;
348 /* the following is unnecessary if the
349 * implementation of >>= uses an arithmetic rather
350 * than logical shift for a signed left operand
351 */
352 if (negative)
353 /* sign extend */
354 value |= - ((gint64)1 <<(size - 7));
355 /* sign bit of byte is second high order bit (0x40) */
356 if ((value == 0 && !(byte & 0x40)) ||
357 (value == -1 && (byte & 0x40)))
358 more = 0;
359 else
360 byte |= 0x80;
361 emit_byte (acfg, byte);
362 }
363 }
364
365 static G_GNUC_UNUSED void
366 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
367 {
368 guint8 *p = buf;
369
370 do {
371 guint8 b = value & 0x7f;
372 value >>= 7;
373 if (value != 0) /* more bytes to come */
374 b |= 0x80;
375 *p ++ = b;
376 } while (value);
377
378 *endbuf = p;
379 }
380
381 static G_GNUC_UNUSED void
382 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
383 {
384 gboolean more = 1;
385 gboolean negative = (value < 0);
386 guint32 size = 32;
387 guint8 byte;
388 guint8 *p = buf;
389
390 while (more) {
391 byte = value & 0x7f;
392 value >>= 7;
393 /* the following is unnecessary if the
394 * implementation of >>= uses an arithmetic rather
395 * than logical shift for a signed left operand
396 */
397 if (negative)
398 /* sign extend */
399 value |= - (1 <<(size - 7));
400 /* sign bit of byte is second high order bit (0x40) */
401 if ((value == 0 && !(byte & 0x40)) ||
402 (value == -1 && (byte & 0x40)))
403 more = 0;
404 else
405 byte |= 0x80;
406 *p ++= byte;
407 }
408
409 *endbuf = p;
410 }
411
412 /* ARCHITECTURE SPECIFIC CODE */
413
414 #if defined(__i386__) || defined(__x86_64__) || defined(__arm__)
415 #define EMIT_DWARF_INFO 1
416 #endif
417
418 /*
419 * arch_emit_direct_call:
420 *
421 * Emit a direct call to the symbol TARGET. CALL_SIZE is set to the size of the
422 * calling code.
423 */
424 static void
425 arch_emit_direct_call (MonoAotCompile *acfg, const char *target, int *call_size)
426 {
427 #if defined(__i386__) || defined(__x86_64__)
428 /* Need to make sure this is exactly 5 bytes long */
429 emit_byte (acfg, '\xe8');
430 emit_symbol_diff (acfg, target, ".", -4);
431 *call_size = 5;
432 #elif defined(__arm__)
433 if (acfg->use_bin_writer) {
434 guint8 buf [4];
435 guint8 *code;
436
437 code = buf;
438 ARM_BL (code, 0);
439
440 img_writer_emit_reloc (acfg->w, R_ARM_CALL, target, -8);
441 emit_bytes (acfg, buf, 4);
442 } else {
443 img_writer_emit_unset_mode (acfg->w);
444 fprintf (acfg->fp, "bl %s\n", target);
445 }
446 *call_size = 4;
447 #else
448 g_assert_not_reached ();
449 #endif
450 }
451
452 /*
453 * arch_emit_got_access:
454 *
455 * The memory pointed to by CODE should hold native code for loading a GOT
456 * slot. Emit this code while patching it so it accesses the GOT slot GOT_SLOT.
457 * CODE_SIZE is set to the number of bytes emitted.
458 */
459 static void
460 arch_emit_got_access (MonoAotCompile *acfg, guint8 *code, int got_slot, int *code_size)
461 {
462 /* Emit beginning of instruction */
463 emit_bytes (acfg, code, mono_arch_get_patch_offset (code));
464
465 /* Emit the offset */
466 #ifdef __x86_64__
467 emit_symbol_diff (acfg, "got", ".", (unsigned int) ((got_slot * sizeof (gpointer)) - 4));
468 #elif defined(__i386__)
469 emit_int32 (acfg, (unsigned int) ((got_slot * sizeof (gpointer))));
470 #elif defined(__arm__)
471 emit_symbol_diff (acfg, "got", ".", (unsigned int) ((got_slot * sizeof (gpointer))) - 12);
472 #else
473 g_assert_not_reached ();
474 #endif
475
476 *code_size = mono_arch_get_patch_offset (code) + 4;
477 }
478
479 /*
480 * arch_emit_plt_entry:
481 *
482 * Emit code for the PLT entry with index INDEX.
483 */
484 static void
485 arch_emit_plt_entry (MonoAotCompile *acfg, int index)
486 {
487 #if defined(__i386__)
488 if (index == 0) {
489 /* It is filled up during loading by the AOT loader. */
490 emit_zero_bytes (acfg, 16);
491 } else {
492 /* Need to make sure this is 9 bytes long */
493 emit_byte (acfg, '\xe9');
494 emit_symbol_diff (acfg, "plt", ".", -4);
495 emit_int32 (acfg, acfg->plt_got_info_offsets [index]);
496 }
497 #elif defined(__x86_64__)
498 /*
499 * We can't emit jumps because they are 32 bits only so they can't be patched.
500 * So we make indirect calls through GOT entries which are patched by the AOT
501 * loader to point to .Lpd entries.
502 * An x86_64 plt entry is 10 bytes long, init_plt () depends on this.
503 */
504 /* jmpq *<offset>(%rip) */
505 emit_byte (acfg, '\xff');
506 emit_byte (acfg, '\x25');
507 emit_symbol_diff (acfg, "got", ".", ((acfg->plt_got_offset_base + index) * sizeof (gpointer)) -4);
508 /* Used by mono_aot_get_plt_info_offset */
509 emit_int32 (acfg, acfg->plt_got_info_offsets [index]);
510 #elif defined(__arm__)
511 guint8 buf [256];
512 guint8 *code;
513
514 /* FIXME:
515 * - optimize OP_AOTCONST implementation
516 * - optimize the PLT entries
517 * - optimize SWITCH AOT implementation
518 * - implement IMT support
519 */
520 code = buf;
521 if (acfg->use_bin_writer) {
522 /* We only emit 1 relocation since we implement it ourselves anyway */
523 img_writer_emit_reloc (acfg->w, R_ARM_ALU_PC_G0_NC, "got", ((acfg->plt_got_offset_base + index) * sizeof (gpointer)) - 8);
524 /* FIXME: A 2 instruction encoding is sufficient in most cases */
525 ARM_ADD_REG_IMM (code, ARMREG_IP, ARMREG_PC, 0, 0);
526 ARM_ADD_REG_IMM (code, ARMREG_IP, ARMREG_IP, 0, 0);
527 ARM_LDR_IMM (code, ARMREG_PC, ARMREG_IP, 0);
528 emit_bytes (acfg, buf, code - buf);
529 /* FIXME: Get rid of this */
530 emit_symbol_diff (acfg, "got", ".", ((acfg->plt_got_offset_base + index) * sizeof (gpointer)));
531 /* Used by mono_aot_get_plt_info_offset */
532 emit_int32 (acfg, acfg->plt_got_info_offsets [index]);
533 } else {
534 ARM_LDR_IMM (code, ARMREG_IP, ARMREG_PC, 4);
535 ARM_ADD_REG_REG (code, ARMREG_IP, ARMREG_PC, ARMREG_IP);
536 ARM_LDR_IMM (code, ARMREG_PC, ARMREG_IP, 0);
537 emit_bytes (acfg, buf, code - buf);
538 emit_symbol_diff (acfg, "got", ".", ((acfg->plt_got_offset_base + index) * sizeof (gpointer)));
539 /* Used by mono_aot_get_plt_info_offset */
540 emit_int32 (acfg, acfg->plt_got_info_offsets [index]);
541 }
542 #else
543 g_assert_not_reached ();
544 #endif
545 }
546
547 /*
548 * arch_emit_specific_trampoline:
549 *
550 * Emit code for a specific trampoline. OFFSET is the offset of the first of
551 * two GOT slots which contain the generic trampoline address and the trampoline
552 * argument. TRAMP_SIZE is set to the size of the emitted trampoline.
553 */
554 static void
555 arch_emit_specific_trampoline (MonoAotCompile *acfg, int offset, int *tramp_size)
556 {
557 /*
558 * The trampolines created here are variations of the specific
559 * trampolines created in mono_arch_create_specific_trampoline (). The
560 * differences are:
561 * - the generic trampoline address is taken from a got slot.
562 * - the offset of the got slot where the trampoline argument is stored
563 * is embedded in the instruction stream, and the generic trampoline
564 * can load the argument by loading the offset, adding it to the
565 * address of the trampoline to get the address of the got slot, and
566 * loading the argument from there.
567 * - all the trampolines should be of the same length.
568 */
569 #if defined(__x86_64__)
570 /* This should be exactly 16 bytes long */
571 *tramp_size = 16;
572 /* call *<offset>(%rip) */
573 emit_byte (acfg, '\x41');
574 emit_byte (acfg, '\xff');
575 emit_byte (acfg, '\x15');
576 emit_symbol_diff (acfg, "got", ".", (offset * sizeof (gpointer)) - 4);
577 /* This should be relative to the start of the trampoline */
578 emit_symbol_diff (acfg, "got", ".", (offset * sizeof (gpointer)) - 4 + 19);
579 emit_zero_bytes (acfg, 5);
580 #elif defined(__arm__)
581 guint8 buf [128];
582 guint8 *code;
583
584 /* This should be exactly 28 bytes long */
585 *tramp_size = 28;
586 code = buf;
587 ARM_PUSH (code, 0x5fff);
588 ARM_LDR_IMM (code, ARMREG_R1, ARMREG_PC, 8);
589 /* Load the value from the GOT */
590 ARM_LDR_REG_REG (code, ARMREG_R1, ARMREG_PC, ARMREG_R1);
591 /* Branch to it */
592 ARM_MOV_REG_REG (code, ARMREG_LR, ARMREG_PC);
593 ARM_MOV_REG_REG (code, ARMREG_PC, ARMREG_R1);
594
595 g_assert (code - buf == 20);
596
597 /* Emit it */
598 emit_bytes (acfg, buf, code - buf);
599 emit_symbol_diff (acfg, "got", ".", (offset * sizeof (gpointer)) - 4 + 8);
600 emit_symbol_diff (acfg, "got", ".", ((offset + 1) * sizeof (gpointer)) - 4 + 8);
601 #else
602 g_assert_not_reached ();
603 #endif
604 }
605
606 /*
607 * arch_emit_unbox_trampoline:
608 *
609 * Emit code for the unbox trampoline for METHOD used in the full-aot case.
610 * CALL_TARGET is the symbol pointing to the native code of METHOD.
611 */
612 static void
613 arch_emit_unbox_trampoline (MonoAotCompile *acfg, MonoMethod *method, MonoGenericSharingContext *gsctx, const char *call_target)
614 {
615 #if defined(__x86_64__)
616 guint8 buf [32];
617 guint8 *code;
618 int this_reg;
619
620 this_reg = mono_arch_get_this_arg_reg (mono_method_signature (method), gsctx, NULL);
621 code = buf;
622 amd64_alu_reg_imm (code, X86_ADD, this_reg, sizeof (MonoObject));
623
624 emit_bytes (acfg, buf, code - buf);
625 /* jump <method> */
626 emit_byte (acfg, '\xe9');
627 emit_symbol_diff (acfg, call_target, ".", -4);
628 #elif defined(__arm__)
629 guint8 buf [128];
630 guint8 *code;
631 int this_pos = 0;
632
633 code = buf;
634
635 if (MONO_TYPE_ISSTRUCT (mono_method_signature (method)->ret))
636 this_pos = 1;
637
638 ARM_ADD_REG_IMM8 (code, this_pos, this_pos, sizeof (MonoObject));
639
640 emit_bytes (acfg, buf, code - buf);
641 /* jump to method */
642 if (acfg->use_bin_writer)
643 g_assert_not_reached ();
644 else
645 fprintf (acfg->fp, "\n\tb %s\n", call_target);
646 #else
647 g_assert_not_reached ();
648 #endif
649 }
650
651 /*
652 * arch_get_cie_program:
653 *
654 * Get the unwind bytecode for the DWARF CIE.
655 */
656 static GSList*
657 arch_get_cie_program (void)
658 {
659 #ifdef __x86_64__
660 GSList *l = NULL;
661
662 mono_add_unwind_op_def_cfa (l, (guint8*)NULL, (guint8*)NULL, AMD64_RSP, 8);
663 mono_add_unwind_op_offset (l, (guint8*)NULL, (guint8*)NULL, AMD64_RIP, -8);
664
665 return l;
666 #else
667 return NULL;
668 #endif
669 }
670
671 /* END OF ARCH SPECIFIC CODE */
672
673 static guint32
674 mono_get_field_token (MonoClassField *field)
675 {
676 MonoClass *klass = field->parent;
677 int i;
678
679 for (i = 0; i < klass->field.count; ++i) {
680 if (field == &klass->fields [i])
681 return MONO_TOKEN_FIELD_DEF | (klass->field.first + 1 + i);
682 }
683
684 g_assert_not_reached ();
685 return 0;
686 }
687
688 static inline void
689 encode_value (gint32 value, guint8 *buf, guint8 **endbuf)
690 {
691 guint8 *p = buf;
692
693 //printf ("ENCODE: %d 0x%x.\n", value, value);
694
695 /*
696 * Same encoding as the one used in the metadata, extended to handle values
697 * greater than 0x1fffffff.
698 */
699 if ((value >= 0) && (value <= 127))
700 *p++ = value;
701 else if ((value >= 0) && (value <= 16383)) {
702 p [0] = 0x80 | (value >> 8);
703 p [1] = value & 0xff;
704 p += 2;
705 } else if ((value >= 0) && (value <= 0x1fffffff)) {
706 p [0] = (value >> 24) | 0xc0;
707 p [1] = (value >> 16) & 0xff;
708 p [2] = (value >> 8) & 0xff;
709 p [3] = value & 0xff;
710 p += 4;
711 }
712 else {
713 p [0] = 0xff;
714 p [1] = (value >> 24) & 0xff;
715 p [2] = (value >> 16) & 0xff;
716 p [3] = (value >> 8) & 0xff;
717 p [4] = value & 0xff;
718 p += 5;
719 }
720 if (endbuf)
721 *endbuf = p;
722 }
723
724 static guint32
725 get_image_index (MonoAotCompile *cfg, MonoImage *image)
726 {
727 guint32 index;
728
729 index = GPOINTER_TO_UINT (g_hash_table_lookup (cfg->image_hash, image));
730 if (index)
731 return index - 1;
732 else {
733 index = g_hash_table_size (cfg->image_hash);
734 g_hash_table_insert (cfg->image_hash, image, GUINT_TO_POINTER (index + 1));
735 g_ptr_array_add (cfg->image_table, image);
736 return index;
737 }
738 }
739
740 static guint32
741 find_typespec_for_class (MonoAotCompile *acfg, MonoClass *klass)
742 {
743 int i;
744 MonoClass *k = NULL;
745
746 /* FIXME: Search referenced images as well */
747 for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPESPEC].rows; ++i) {
748 k = mono_class_get_full (acfg->image, MONO_TOKEN_TYPE_SPEC | (i + 1), NULL);
749 if (k == klass)
750 break;
751 }
752
753 if (i < acfg->image->tables [MONO_TABLE_TYPESPEC].rows)
754 return MONO_TOKEN_TYPE_SPEC | (i + 1);
755 else
756 return 0;
757 }
758
759 static void
760 encode_method_ref (MonoAotCompile *acfg, MonoMethod *method, guint8 *buf, guint8 **endbuf);
761
762 /*
763 * encode_klass_ref:
764 *
765 * Encode a reference to KLASS. We use our home-grown encoding instead of the
766 * standard metadata encoding.
767 */
768 static void
769 encode_klass_ref (MonoAotCompile *acfg, MonoClass *klass, guint8 *buf, guint8 **endbuf)
770 {
771 guint8 *p = buf;
772
773 if (klass->generic_class) {
774 guint32 token;
775 g_assert (klass->type_token);
776
777 /* Find a typespec for a class if possible */
778 token = find_typespec_for_class (acfg, klass);
779 if (token) {
780 encode_value (token, p, &p);
781 encode_value (get_image_index (acfg, acfg->image), p, &p);
782 } else {
783 MonoClass *gclass = klass->generic_class->container_class;
784 MonoGenericInst *inst = klass->generic_class->context.class_inst;
785 int i;
786
787 /* Encode it ourselves */
788 /* Marker */
789 encode_value (MONO_TOKEN_TYPE_SPEC, p, &p);
790 encode_value (MONO_TYPE_GENERICINST, p, &p);
791 encode_klass_ref (acfg, gclass, p, &p);
792 encode_value (inst->type_argc, p, &p);
793 for (i = 0; i < inst->type_argc; ++i)
794 encode_klass_ref (acfg, mono_class_from_mono_type (inst->type_argv [i]), p, &p);
795 }
796 } else if (klass->type_token) {
797 g_assert (mono_metadata_token_code (klass->type_token) == MONO_TOKEN_TYPE_DEF);
798 encode_value (klass->type_token - MONO_TOKEN_TYPE_DEF, p, &p);
799 encode_value (get_image_index (acfg, klass->image), p, &p);
800 } else if ((klass->byval_arg.type == MONO_TYPE_VAR) || (klass->byval_arg.type == MONO_TYPE_MVAR)) {
801 MonoGenericParam *param = klass->byval_arg.data.generic_param;
802
803 /* Marker */
804 encode_value (MONO_TOKEN_TYPE_SPEC, p, &p);
805 encode_value (klass->byval_arg.type, p, &p);
806
807 encode_value (param->num, p, &p);
808
809 g_assert (param->owner);
810 encode_value (param->owner->is_method, p, &p);
811 if (param->owner->is_method)
812 encode_method_ref (acfg, param->owner->owner.method, p, &p);
813 else
814 encode_klass_ref (acfg, param->owner->owner.klass, p, &p);
815 } else {
816 /* Array class */
817 g_assert (klass->rank > 0);
818 encode_value (MONO_TOKEN_TYPE_DEF, p, &p);
819 encode_value (get_image_index (acfg, klass->image), p, &p);
820 encode_value (klass->rank, p, &p);
821 encode_klass_ref (acfg, klass->element_class, p, &p);
822 }
823 *endbuf = p;
824 }
825
826 static void
827 encode_field_info (MonoAotCompile *cfg, MonoClassField *field, guint8 *buf, guint8 **endbuf)
828 {
829 guint32 token = mono_get_field_token (field);
830 guint8 *p = buf;
831
832 encode_klass_ref (cfg, field->parent, p, &p);
833 g_assert (mono_metadata_token_code (token) == MONO_TOKEN_FIELD_DEF);
834 encode_value (token - MONO_TOKEN_FIELD_DEF, p, &p);
835 *endbuf = p;
836 }
837
838 static void
839 encode_generic_context (MonoAotCompile *acfg, MonoGenericContext *context, guint8 *buf, guint8 **endbuf)
840 {
841 guint8 *p = buf;
842 int i;
843 MonoGenericInst *inst;
844
845 /* Encode the context */
846 inst = context->class_inst;
847 encode_value (inst ? 1 : 0, p, &p);
848 if (inst) {
849 encode_value (inst->type_argc, p, &p);
850 for (i = 0; i < inst->type_argc; ++i)
851 encode_klass_ref (acfg, mono_class_from_mono_type (inst->type_argv [i]), p, &p);
852 }
853 inst = context->method_inst;
854 encode_value (inst ? 1 : 0, p, &p);
855 if (inst) {
856 encode_value (inst->type_argc, p, &p);
857 for (i = 0; i < inst->type_argc; ++i)
858 encode_klass_ref (acfg, mono_class_from_mono_type (inst->type_argv [i]), p, &p);
859 }
860
861 *endbuf = p;
862 }
863
864 #define MAX_IMAGE_INDEX 250
865
866 static void
867 encode_method_ref (MonoAotCompile *acfg, MonoMethod *method, guint8 *buf, guint8 **endbuf)
868 {
869 guint32 image_index = get_image_index (acfg, method->klass->image);
870 guint32 token = method->token;
871 MonoJumpInfoToken *ji;
872 guint8 *p = buf;
873 char *name;
874
875 /*
876 * The encoding for most methods is as follows:
877 * - image index encoded as a leb128
878 * - token index encoded as a leb128
879 * Values of image index >= MONO_AOT_METHODREF_MIN are used to mark additional
880 * types of method encodings.
881 */
882
883 g_assert (image_index < MONO_AOT_METHODREF_MIN);
884
885 /* Mark methods which can't use aot trampolines because they need the further
886 * processing in mono_magic_trampoline () which requires a MonoMethod*.
887 */
888 if ((method->is_generic && (method->flags & METHOD_ATTRIBUTE_VIRTUAL)) ||
889 (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
890 encode_value ((MONO_AOT_METHODREF_NO_AOT_TRAMPOLINE << 24), p, &p);
891
892 /*
893 * Some wrapper methods are shared using their signature, encode their
894 * stringified signature instead.
895 * FIXME: Optimize disk usage
896 */
897 name = NULL;
898 if (method->wrapper_type) {
899 if (method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
900 char *tmpsig = mono_signature_get_desc (mono_method_signature (method), TRUE);
901 name = g_strdup_printf ("(wrapper runtime-invoke):%s (%s)", method->name, tmpsig);
902 g_free (tmpsig);
903 } else if (method->wrapper_type == MONO_WRAPPER_DELEGATE_INVOKE) {
904 char *tmpsig = mono_signature_get_desc (mono_method_signature (method), TRUE);
905 name = g_strdup_printf ("(wrapper delegate-invoke):%s (%s)", method->name, tmpsig);
906 g_free (tmpsig);
907 } else if (method->wrapper_type == MONO_WRAPPER_DELEGATE_BEGIN_INVOKE) {
908 char *tmpsig = mono_signature_get_desc (mono_method_signature (method), TRUE);
909 name = g_strdup_printf ("(wrapper delegate-begin-invoke):%s (%s)", method->name, tmpsig);
910 g_free (tmpsig);
911 } else if (method->wrapper_type == MONO_WRAPPER_DELEGATE_END_INVOKE) {
912 char *tmpsig = mono_signature_get_desc (mono_method_signature (method), TRUE);
913 name = g_strdup_printf ("(wrapper delegate-end-invoke):%s (%s)", method->name, tmpsig);
914 g_free (tmpsig);
915 }
916 }
917
918 if (name) {
919 encode_value ((MONO_AOT_METHODREF_WRAPPER_NAME << 24), p, &p);
920 strcpy ((char*)p, name);
921 p += strlen (name) + 1;
922 g_free (name);
923 } else if (method->wrapper_type) {
924 encode_value ((MONO_AOT_METHODREF_WRAPPER << 24), p, &p);
925
926 encode_value (method->wrapper_type, p, &p);
927
928 switch (method->wrapper_type) {
929 case MONO_WRAPPER_REMOTING_INVOKE:
930 case MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK:
931 case MONO_WRAPPER_XDOMAIN_INVOKE: {
932 MonoMethod *m;
933
934 m = mono_marshal_method_from_wrapper (method);
935 g_assert (m);
936 encode_method_ref (acfg, m, p, &p);
937 break;
938 }
939 case MONO_WRAPPER_PROXY_ISINST:
940 case MONO_WRAPPER_LDFLD:
941 case MONO_WRAPPER_LDFLDA:
942 case MONO_WRAPPER_STFLD:
943 case MONO_WRAPPER_ISINST: {
944 MonoClass *proxy_class = (MonoClass*)mono_marshal_method_from_wrapper (method);
945 encode_klass_ref (acfg, proxy_class, p, &p);
946 break;
947 }
948 case MONO_WRAPPER_LDFLD_REMOTE:
949 case MONO_WRAPPER_STFLD_REMOTE:
950 break;
951 case MONO_WRAPPER_ALLOC: {
952 int alloc_type = mono_gc_get_managed_allocator_type (method);
953 g_assert (alloc_type != -1);
954 encode_value (alloc_type, p, &p);
955 break;
956 }
957 case MONO_WRAPPER_STELEMREF:
958 break;
959 case MONO_WRAPPER_UNKNOWN:
960 if (strcmp (method->name, "FastMonitorEnter") == 0)
961 encode_value (MONO_AOT_WRAPPER_MONO_ENTER, p, &p);
962 else if (strcmp (method->name, "FastMonitorExit") == 0)
963 encode_value (MONO_AOT_WRAPPER_MONO_EXIT, p, &p);
964 else
965 g_assert_not_reached ();
966 break;
967 case MONO_WRAPPER_STATIC_RGCTX_INVOKE:
968 case MONO_WRAPPER_SYNCHRONIZED: {
969 MonoMethod *m;
970
971 m = mono_marshal_method_from_wrapper (method);
972 g_assert (m);
973 encode_method_ref (acfg, m, p, &p);
974 break;
975 }
976 default:
977 g_assert_not_reached ();
978 }
979 } else if (mono_method_signature (method)->is_inflated) {
980 /*
981 * This is a generic method, find the original token which referenced it and
982 * encode that.
983 * Obtain the token from information recorded by the JIT.
984 */
985 ji = g_hash_table_lookup (acfg->token_info_hash, method);
986 if (ji) {
987 image_index = get_image_index (acfg, ji->image);
988 g_assert (image_index < MAX_IMAGE_INDEX);
989 token = ji->token;
990
991 encode_value ((MONO_AOT_METHODREF_METHODSPEC << 24), p, &p);
992 encode_value (image_index, p, &p);
993 encode_value (token, p, &p);
994 } else {
995 MonoMethod *declaring;
996 MonoGenericContext *context = mono_method_get_context (method);
997
998 g_assert (method->is_inflated);
999 declaring = ((MonoMethodInflated*)method)->declaring;
1000
1001 /*
1002 * This might be a non-generic method of a generic instance, which
1003 * doesn't have a token since the reference is generated by the JIT
1004 * like Nullable:Box/Unbox, or by generic sharing.
1005 */
1006
1007 encode_value ((MONO_AOT_METHODREF_GINST << 24), p, &p);
1008 /* Encode the klass */
1009 encode_klass_ref (acfg, method->klass, p, &p);
1010 /* Encode the method */
1011 image_index = get_image_index (acfg, method->klass->image);
1012 g_assert (image_index < MAX_IMAGE_INDEX);
1013 g_assert (declaring->token);
1014 token = declaring->token;
1015 g_assert (mono_metadata_token_table (token) == MONO_TABLE_METHOD);
1016 encode_value (image_index, p, &p);
1017 encode_value (token, p, &p);
1018 encode_generic_context (acfg, context, p, &p);
1019 }
1020 } else if (token == 0) {
1021 /* This might be a method of a constructed type like int[,].Set */
1022 /* Obtain the token from information recorded by the JIT */
1023 ji = g_hash_table_lookup (acfg->token_info_hash, method);
1024 if (ji) {
1025 image_index = get_image_index (acfg, ji->image);
1026 g_assert (image_index < MAX_IMAGE_INDEX);
1027 token = ji->token;
1028
1029 encode_value ((MONO_AOT_METHODREF_METHODSPEC << 24), p, &p);
1030 encode_value (image_index, p, &p);
1031 encode_value (token, p, &p);
1032 } else {
1033 /* Array methods */
1034 g_assert (method->klass->rank);
1035
1036 /* Encode directly */
1037 encode_value ((MONO_AOT_METHODREF_ARRAY << 24), p, &p);
1038 encode_klass_ref (acfg, method->klass, p, &p);
1039 if (!strcmp (method->name, ".ctor") && mono_method_signature (method)->param_count == method->klass->rank)
1040 encode_value (0, p, &p);
1041 else if (!strcmp (method->name, ".ctor") && mono_method_signature (method)->param_count == method->klass->rank * 2)
1042 encode_value (1, p, &p);
1043 else if (!strcmp (method->name, "Get"))
1044 encode_value (2, p, &p);
1045 else if (!strcmp (method->name, "Address"))
1046 encode_value (3, p, &p);
1047 else if (!strcmp (method->name, "Set"))
1048 encode_value (4, p, &p);
1049 else
1050 g_assert_not_reached ();
1051 }
1052 } else {
1053 g_assert (mono_metadata_token_table (token) == MONO_TABLE_METHOD);
1054 encode_value ((image_index << 24) | mono_metadata_token_index (token), p, &p);
1055 }
1056 *endbuf = p;
1057 }
1058
1059 static gint
1060 compare_patches (gconstpointer a, gconstpointer b)
1061 {
1062 int i, j;
1063
1064 i = (*(MonoJumpInfo**)a)->ip.i;
1065 j = (*(MonoJumpInfo**)b)->ip.i;
1066
1067 if (i < j)
1068 return -1;
1069 else
1070 if (i > j)
1071 return 1;
1072 else
1073 return 0;
1074 }
1075
1076 /*
1077 * is_plt_patch:
1078 *
1079 * Return whenever PATCH_INFO refers to a direct call, and thus requires a
1080 * PLT entry.
1081 */
1082 static inline gboolean
1083 is_plt_patch (MonoJumpInfo *patch_info)
1084 {
1085 switch (patch_info->type) {
1086 case MONO_PATCH_INFO_METHOD:
1087 case MONO_PATCH_INFO_INTERNAL_METHOD:
1088 case MONO_PATCH_INFO_JIT_ICALL_ADDR:
1089 case MONO_PATCH_INFO_ICALL_ADDR:
1090 case MONO_PATCH_INFO_CLASS_INIT:
1091 case MONO_PATCH_INFO_RGCTX_FETCH:
1092 case MONO_PATCH_INFO_GENERIC_CLASS_INIT:
1093 case MONO_PATCH_INFO_MONITOR_ENTER:
1094 case MONO_PATCH_INFO_MONITOR_EXIT:
1095 return TRUE;
1096 default:
1097 return FALSE;
1098 }
1099 }
1100
1101 static gboolean
1102 is_got_patch (MonoJumpInfoType patch_type)
1103 {
1104 return TRUE;
1105 }
1106
1107 /*
1108 * is_shared_got_patch:
1109 *
1110 * Return whenever PATCH_INFO refers to a patch which needs a shared GOT
1111 * entry.
1112 * Keep it in sync with the version in aot-runtime.c.
1113 */
1114 static inline gboolean
1115 is_shared_got_patch (MonoJumpInfo *patch_info)
1116 {
1117 switch (patch_info->type) {
1118 case MONO_PATCH_INFO_VTABLE:
1119 case MONO_PATCH_INFO_CLASS:
1120 case MONO_PATCH_INFO_IID:
1121 case MONO_PATCH_INFO_ADJUSTED_IID:
1122 case MONO_PATCH_INFO_FIELD:
1123 case MONO_PATCH_INFO_SFLDA:
1124 case MONO_PATCH_INFO_DECLSEC:
1125 case MONO_PATCH_INFO_LDTOKEN:
1126 case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
1127 case MONO_PATCH_INFO_RVA:
1128 case MONO_PATCH_INFO_METHODCONST:
1129 case MONO_PATCH_INFO_IMAGE:
1130 return TRUE;
1131 default:
1132 return FALSE;
1133 }
1134 }
1135
1136 static int
1137 get_plt_offset (MonoAotCompile *acfg, MonoJumpInfo *patch_info)
1138 {
1139 int res = -1;
1140
1141 if (is_plt_patch (patch_info)) {
1142 int idx = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->patch_to_plt_offset, patch_info));
1143
1144 if (patch_info->type == MONO_PATCH_INFO_METHOD && (patch_info->data.method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)) {
1145 /*
1146 * Allocate a separate PLT slot for each such patch, since some plt
1147 * entries will refer to the method itself, and some will refer to
1148 * wrapper.
1149 */
1150 idx = 0;
1151 }
1152
1153 if (idx) {
1154 res = idx;
1155 } else {
1156 MonoJumpInfo *new_ji = mono_patch_info_dup_mp (acfg->mempool, patch_info);
1157
1158 res = acfg->plt_offset;
1159 g_hash_table_insert (acfg->plt_offset_to_patch, GUINT_TO_POINTER (res), new_ji);
1160 g_hash_table_insert (acfg->patch_to_plt_offset, new_ji, GUINT_TO_POINTER (res));
1161 acfg->plt_offset ++;
1162 }
1163 }
1164
1165 return res;
1166 }
1167
1168 /**
1169 * get_got_offset:
1170 *
1171 * Returns the offset of the GOT slot where the runtime object resulting from resolving
1172 * JI could be found if it exists, otherwise allocates a new one.
1173 */
1174 static guint32
1175 get_got_offset (MonoAotCompile *acfg, MonoJumpInfo *ji)
1176 {
1177 guint32 got_offset;
1178
1179 got_offset = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->patch_to_shared_got_offset, ji));
1180 if (got_offset)
1181 return got_offset - 1;
1182
1183 got_offset = acfg->got_offset;
1184 acfg->got_offset ++;
1185
1186 acfg->stats.got_slots ++;
1187 acfg->stats.got_slot_types [ji->type] ++;
1188
1189 return got_offset;
1190 }
1191
1192 static guint32
1193 get_shared_got_offset (MonoAotCompile *acfg, MonoJumpInfo *ji)
1194 {
1195 MonoJumpInfo *copy;
1196 guint32 got_offset;
1197
1198 if (!g_hash_table_lookup (acfg->patch_to_shared_got_offset, ji)) {
1199 got_offset = get_got_offset (acfg, ji);
1200 copy = mono_patch_info_dup_mp (acfg->mempool, ji);
1201 g_hash_table_insert (acfg->patch_to_shared_got_offset, copy, GUINT_TO_POINTER (got_offset + 1));
1202 g_ptr_array_add (acfg->shared_patches, copy);
1203 }
1204
1205 return get_got_offset (acfg, ji);
1206 }
1207
1208 /* Add a method to the list of methods which need to be emitted */
1209 static void
1210 add_method_with_index (MonoAotCompile *acfg, MonoMethod *method, int index)
1211 {
1212 g_assert (method);
1213 if (!g_hash_table_lookup (acfg->method_indexes, method)) {
1214 g_ptr_array_add (acfg->methods, method);
1215 g_hash_table_insert (acfg->method_indexes, method, GUINT_TO_POINTER (index + 1));
1216 acfg->nmethods = acfg->methods->len + 1;
1217 }
1218 }
1219
1220 static guint32
1221 get_method_index (MonoAotCompile *acfg, MonoMethod *method)
1222 {
1223 int index = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->method_indexes, method));
1224
1225 g_assert (index);
1226
1227 return index - 1;
1228 }
1229
1230 static int
1231 add_method (MonoAotCompile *acfg, MonoMethod *method)
1232 {
1233 int index;
1234
1235 index = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->method_indexes, method));
1236 if (index)
1237 return index - 1;
1238
1239 index = acfg->method_index;
1240 add_method_with_index (acfg, method, index);
1241
1242 /* FIXME: Fix quadratic behavior */
1243 acfg->method_order = g_list_append (acfg->method_order, GUINT_TO_POINTER (index));
1244
1245 acfg->method_index ++;
1246
1247 return index;
1248 }
1249
1250 static void
1251 add_extra_method (MonoAotCompile *acfg, MonoMethod *method)
1252 {
1253 int index;
1254
1255 index = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->method_indexes, method));
1256 if (index)
1257 return;
1258 add_method (acfg, method);
1259 g_ptr_array_add (acfg->extra_methods, method);
1260 }
1261
1262 static void
1263 add_jit_icall_wrapper (gpointer key, gpointer value, gpointer user_data)
1264 {
1265 MonoAotCompile *acfg = user_data;
1266 MonoJitICallInfo *callinfo = value;
1267 MonoMethod *wrapper;
1268 char *name;
1269
1270 if (!callinfo->sig)
1271 return;
1272
1273 name = g_strdup_printf ("__icall_wrapper_%s", callinfo->name);
1274 wrapper = mono_marshal_get_icall_wrapper (callinfo->sig, name, callinfo->func, check_for_pending_exc);
1275 g_free (name);
1276
1277 add_method (acfg, wrapper);
1278 }
1279
1280 static MonoMethod*
1281 get_runtime_invoke_sig (MonoMethodSignature *sig)
1282 {
1283 MonoMethodBuilder *mb;
1284 MonoMethod *m;
1285
1286 mb = mono_mb_new (mono_defaults.object_class, "FOO", MONO_WRAPPER_NONE);
1287 m = mono_mb_create_method (mb, sig, 16);
1288 return mono_marshal_get_runtime_invoke (m, FALSE);
1289 }
1290
1291 static void
1292 add_wrappers (MonoAotCompile *acfg)
1293 {
1294 MonoMethod *method, *m;
1295 int i, j, nallocators;
1296 MonoMethodSignature *sig, *csig;
1297 guint32 token;
1298
1299 /*
1300 * FIXME: Instead of AOTing all the wrappers, it might be better to redesign them
1301 * so there is only one wrapper of a given type, or inlining their contents into their
1302 * callers.
1303 */
1304
1305 /*
1306 * FIXME: This depends on the fact that different wrappers have different
1307 * names.
1308 */
1309
1310 /* FIXME: Collect these automatically */
1311
1312 /* Runtime invoke wrappers */
1313
1314 /* void runtime-invoke () [.cctor] */
1315 csig = mono_metadata_signature_alloc (mono_defaults.corlib, 0);
1316 csig->ret = &mono_defaults.void_class->byval_arg;
1317 add_method (acfg, get_runtime_invoke_sig (csig));
1318
1319 /* void runtime-invoke () [Finalize] */
1320 csig = mono_metadata_signature_alloc (mono_defaults.corlib, 0);
1321 csig->hasthis = 1;
1322 csig->ret = &mono_defaults.void_class->byval_arg;
1323 add_method (acfg, get_runtime_invoke_sig (csig));
1324
1325 /* void runtime-invoke (string) [exception ctor] */
1326 csig = mono_metadata_signature_alloc (mono_defaults.corlib, 1);
1327 csig->hasthis = 1;
1328 csig->ret = &mono_defaults.void_class->byval_arg;
1329 csig->params [0] = &mono_defaults.string_class->byval_arg;
1330 add_method (acfg, get_runtime_invoke_sig (csig));
1331
1332 /* void runtime-invoke (string, string) [exception ctor] */
1333 csig = mono_metadata_signature_alloc (mono_defaults.corlib, 2);
1334 csig->hasthis = 1;
1335 csig->ret = &mono_defaults.void_class->byval_arg;
1336 csig->params [0] = &mono_defaults.string_class->byval_arg;
1337 csig->params [1] = &mono_defaults.string_class->byval_arg;
1338 add_method (acfg, get_runtime_invoke_sig (csig));
1339
1340 /* string runtime-invoke () [Exception.ToString ()] */
1341 csig = mono_metadata_signature_alloc (mono_defaults.corlib, 0);
1342 csig->hasthis = 1;
1343 csig->ret = &mono_defaults.string_class->byval_arg;
1344 add_method (acfg, get_runtime_invoke_sig (csig));
1345
1346 /* void runtime-invoke (string, Exception) [exception ctor] */
1347 csig = mono_metadata_signature_alloc (mono_defaults.corlib, 2);
1348 csig->hasthis = 1;
1349 csig->ret = &mono_defaults.void_class->byval_arg;
1350 csig->params [0] = &mono_defaults.string_class->byval_arg;
1351 csig->params [1] = &mono_defaults.exception_class->byval_arg;
1352 add_method (acfg, get_runtime_invoke_sig (csig));
1353
1354 /* Assembly runtime-invoke (string, bool) [DoAssemblyResolve] */
1355 csig = mono_metadata_signature_alloc (mono_defaults.corlib, 2);
1356 csig->hasthis = 1;
1357 csig->ret = &(mono_class_from_name (
1358 mono_defaults.corlib, "System.Reflection", "Assembly"))->byval_arg;
1359 csig->params [0] = &mono_defaults.string_class->byval_arg;
1360 csig->params [1] = &mono_defaults.boolean_class->byval_arg;
1361 add_method (acfg, get_runtime_invoke_sig (csig));
1362
1363 /* runtime-invoke used by finalizers */
1364 add_method (acfg, mono_marshal_get_runtime_invoke (mono_class_get_method_from_name_flags (mono_defaults.object_class, "Finalize", 0, 0), TRUE));
1365
1366 for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
1367 MonoMethod *method;
1368 guint32 token = MONO_TOKEN_METHOD_DEF | (i + 1);
1369 gboolean skip = FALSE;
1370
1371 method = mono_get_method (acfg->image, token, NULL);
1372
1373 if ((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
1374 (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
1375 (method->flags & METHOD_ATTRIBUTE_ABSTRACT))
1376 skip = TRUE;
1377
1378 if (method->is_generic || method->klass->generic_container)
1379 skip = TRUE;
1380
1381 /* Skip methods which can not be handled by get_runtime_invoke () */
1382 sig = mono_method_signature (method);
1383 if ((sig->ret->type == MONO_TYPE_PTR) ||
1384 (sig->ret->type == MONO_TYPE_TYPEDBYREF))
1385 skip = TRUE;
1386
1387 for (j = 0; j < sig->param_count; j++) {
1388 if (sig->params [j]->type == MONO_TYPE_TYPEDBYREF)
1389 skip = TRUE;
1390 }
1391
1392 if (!skip)
1393 add_method (acfg, mono_marshal_get_runtime_invoke (method, FALSE));
1394 }
1395
1396 if (strcmp (acfg->image->assembly->aname.name, "mscorlib") == 0) {
1397 MonoMethodDesc *desc;
1398 MonoMethod *orig_method;
1399
1400 /* JIT icall wrappers */
1401 /* FIXME: locking */
1402 g_hash_table_foreach (mono_get_jit_icall_info (), add_jit_icall_wrapper, acfg);
1403
1404 /* Managed Allocators */
1405 nallocators = mono_gc_get_managed_allocator_types ();
1406 for (i = 0; i < nallocators; ++i) {
1407 m = mono_gc_get_managed_allocator_by_type (i);
1408 if (m)
1409 add_method (acfg, m);
1410 }
1411
1412 /* stelemref */
1413 add_method (acfg, mono_marshal_get_stelemref ());
1414
1415 /* Monitor Enter/Exit */
1416 desc = mono_method_desc_new ("Monitor:Enter", FALSE);
1417 orig_method = mono_method_desc_search_in_class (desc, mono_defaults.monitor_class);
1418 g_assert (orig_method);
1419 mono_method_desc_free (desc);
1420 method = mono_monitor_get_fast_path (orig_method);
1421 if (method)
1422 add_method (acfg, method);
1423
1424 desc = mono_method_desc_new ("Monitor:Exit", FALSE);
1425 orig_method = mono_method_desc_search_in_class (desc, mono_defaults.monitor_class);
1426 g_assert (orig_method);
1427 mono_method_desc_free (desc);
1428 method = mono_monitor_get_fast_path (orig_method);
1429 if (method)
1430 add_method (acfg, method);
1431 }
1432
1433 /* remoting-invoke wrappers */
1434 for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
1435 MonoMethodSignature *sig;
1436
1437 token = MONO_TOKEN_METHOD_DEF | (i + 1);
1438 method = mono_get_method (acfg->image, token, NULL);
1439
1440 sig = mono_method_signature (method);
1441
1442 if (sig->hasthis && (method->klass->marshalbyref || method->klass == mono_defaults.object_class) &&
1443 !(method->flags & METHOD_ATTRIBUTE_VIRTUAL)) {
1444 m = mono_marshal_get_remoting_invoke_with_check (method);
1445
1446 add_method (acfg, m);
1447 }
1448 }
1449
1450 /* delegate-invoke wrappers */
1451 for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPEDEF].rows; ++i) {
1452 MonoClass *klass;
1453
1454 token = MONO_TOKEN_TYPE_DEF | (i + 1);
1455 klass = mono_class_get (acfg->image, token);
1456
1457 if (klass->delegate && klass != mono_defaults.delegate_class && klass != mono_defaults.multicastdelegate_class && !klass->generic_container) {
1458 method = mono_get_delegate_invoke (klass);
1459
1460 m = mono_marshal_get_delegate_invoke (method, NULL);
1461
1462 add_method (acfg, m);
1463
1464 method = mono_class_get_method_from_name_flags (klass, "BeginInvoke", -1, 0);
1465 add_method (acfg, mono_marshal_get_delegate_begin_invoke (method));
1466
1467 method = mono_class_get_method_from_name_flags (klass, "EndInvoke", -1, 0);
1468 add_method (acfg, mono_marshal_get_delegate_end_invoke (method));
1469 }
1470 }
1471
1472 /* Synchronized wrappers */
1473 for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
1474 token = MONO_TOKEN_METHOD_DEF | (i + 1);
1475 method = mono_get_method (acfg->image, token, NULL);
1476
1477 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
1478 add_method (acfg, mono_marshal_get_synchronized_wrapper (method));
1479 }
1480
1481 #if 0
1482 /* static rgctx wrappers */
1483 /* FIXME: Each wrapper belongs to a given instantiation of a generic method */
1484 for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
1485 token = MONO_TOKEN_METHOD_DEF | (i + 1);
1486 method = mono_get_method (acfg->image, token, NULL);
1487
1488 if (((method->flags & METHOD_ATTRIBUTE_STATIC) ||
1489 (method->is_inflated && mono_method_get_context (method)->method_inst)) &&
1490 mono_class_generic_sharing_enabled (method->klass) &&
1491 mono_method_is_generic_sharable_impl (method, FALSE)) {
1492 m = mono_marshal_get_static_rgctx_invoke (method);
1493 add_method (acfg, m);
1494 }
1495 }
1496 #endif
1497
1498 /* pinvoke wrappers */
1499 for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
1500 MonoMethod *method;
1501 guint32 token = MONO_TOKEN_METHOD_DEF | (i + 1);
1502
1503 method = mono_get_method (acfg->image, token, NULL);
1504
1505 if ((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
1506 (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
1507 add_method (acfg, mono_marshal_get_native_wrapper (method, TRUE, TRUE));
1508 }
1509 }
1510 }
1511
1512 static gboolean
1513 has_type_vars (MonoClass *klass)
1514 {
1515 if ((klass->byval_arg.type == MONO_TYPE_VAR) || (klass->byval_arg.type == MONO_TYPE_MVAR))
1516 return TRUE;
1517 if (klass->rank)
1518 return has_type_vars (klass->element_class);
1519 if (klass->generic_class) {
1520 MonoGenericContext *context = &klass->generic_class->context;
1521 if (context->class_inst) {
1522 int i;
1523
1524 for (i = 0; i < context->class_inst->type_argc; ++i)
1525 if (has_type_vars (mono_class_from_mono_type (context->class_inst->type_argv [i])))
1526 return TRUE;
1527 }
1528 }
1529 return FALSE;
1530 }
1531
1532 static gboolean
1533 method_has_type_vars (MonoMethod *method)
1534 {
1535 if (has_type_vars (method->klass))
1536 return TRUE;
1537
1538 if (method->is_inflated) {
1539 MonoGenericContext *context = mono_method_get_context (method);
1540 if (context->method_inst) {
1541 int i;
1542
1543 for (i = 0; i < context->method_inst->type_argc; ++i)
1544 if (has_type_vars (mono_class_from_mono_type (context->method_inst->type_argv [i])))
1545 return TRUE;
1546 }
1547 }
1548 return FALSE;
1549 }
1550
1551 /*
1552 * add_generic_class:
1553 *
1554 * Add all methods of a generic class.
1555 */
1556 static void
1557 add_generic_class (MonoAotCompile *acfg, MonoClass *klass)
1558 {
1559 MonoMethod *method;
1560 gpointer iter;
1561
1562 mono_class_init (klass);
1563
1564 if (klass->generic_class && klass->generic_class->context.class_inst->is_open)
1565 return;
1566
1567 if (has_type_vars (klass))
1568 return;
1569
1570 if (!klass->generic_class && !klass->rank)
1571 return;
1572
1573 /*
1574 * Add rgctx wrappers for cctors since those are called by the runtime, so
1575 * there is no methodspec for them. This is needed even for shared classes,
1576 * since rgctx wrappers belong to inflated methods.
1577 */
1578 method = mono_class_get_cctor (klass);
1579 if (method && mono_method_needs_static_rgctx_invoke (method, FALSE))
1580 add_extra_method (acfg, mono_marshal_get_static_rgctx_invoke (method));
1581
1582 iter = NULL;
1583 while ((method = mono_class_get_methods (klass, &iter))) {
1584 if (mono_method_is_generic_sharable_impl (method, FALSE))
1585 /* Already added */
1586 continue;
1587
1588 if (method->is_generic)
1589 /* FIXME: */
1590 continue;
1591
1592 /*
1593 * FIXME: Instances which are referenced by these methods are not added,
1594 * for example Array.Resize<int> for List<int>.Add ().
1595 */
1596 add_extra_method (acfg, method);
1597 }
1598 }
1599
1600 /*
1601 * add_generic_instances:
1602 *
1603 * Add instances referenced by the METHODSPEC/TYPESPEC table.
1604 */
1605 static void
1606 add_generic_instances (MonoAotCompile *acfg)
1607 {
1608 int i;
1609 guint32 token;
1610 MonoMethod *method;
1611 MonoGenericContext *context;
1612
1613 for (i = 0; i < acfg->image->tables [MONO_TABLE_METHODSPEC].rows; ++i) {
1614 token = MONO_TOKEN_METHOD_SPEC | (i + 1);
1615 method = mono_get_method (acfg->image, token, NULL);
1616
1617 context = mono_method_get_context (method);
1618 if (context && ((context->class_inst && context->class_inst->is_open) ||
1619 (context->method_inst && context->method_inst->is_open)))
1620 continue;
1621
1622 if (method->klass->image != acfg->image)
1623 continue;
1624
1625 if (mono_method_is_generic_sharable_impl (method, FALSE))
1626 /* Already added */
1627 continue;
1628
1629 add_extra_method (acfg, method);
1630 }
1631
1632 for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPESPEC].rows; ++i) {
1633 MonoClass *klass;
1634
1635 token = MONO_TOKEN_TYPE_SPEC | (i + 1);
1636
1637 klass = mono_class_get (acfg->image, token);
1638 if (!klass)
1639 continue;
1640
1641 add_generic_class (acfg, klass);
1642 }
1643 }
1644
1645 /*
1646 * emit_and_reloc_code:
1647 *
1648 * Emit the native code in CODE, handling relocations along the way. If GOT_ONLY
1649 * is true, calls are made through the GOT too. This is used for emitting trampolines
1650 * in full-aot mode, since calls made from trampolines couldn't go through the PLT,
1651 * since trampolines are needed to make PTL work.
1652 */
1653 static void
1654 emit_and_reloc_code (MonoAotCompile *acfg, MonoMethod *method, guint8 *code, guint32 code_len, MonoJumpInfo *relocs, gboolean got_only)
1655 {
1656 int i, pindex, start_index, method_index;
1657 GPtrArray *patches;
1658 MonoJumpInfo *patch_info;
1659 MonoMethodHeader *header;
1660 gboolean skip, direct_call;
1661 guint32 got_slot;
1662 char direct_call_target [128];
1663
1664 if (method) {
1665 header = mono_method_get_header (method);
1666
1667 method_index = get_method_index (acfg, method);
1668 }
1669
1670 /* Collect and sort relocations */
1671 patches = g_ptr_array_new ();
1672 for (patch_info = relocs; patch_info; patch_info = patch_info->next)
1673 g_ptr_array_add (patches, patch_info);
1674 g_ptr_array_sort (patches, compare_patches);
1675
1676 start_index = 0;
1677 for (i = 0; i < code_len; i++) {
1678 patch_info = NULL;
1679 for (pindex = start_index; pindex < patches->len; ++pindex) {
1680 patch_info = g_ptr_array_index (patches, pindex);
1681 if (patch_info->ip.i >= i)
1682 break;
1683 }
1684
1685 #ifdef MONO_ARCH_AOT_SUPPORTED
1686 skip = FALSE;
1687 if (patch_info && (patch_info->ip.i == i) && (pindex < patches->len)) {
1688 start_index = pindex;
1689
1690 switch (patch_info->type) {
1691 case MONO_PATCH_INFO_NONE:
1692 break;
1693 case MONO_PATCH_INFO_GOT_OFFSET: {
1694 guint32 offset = mono_arch_get_patch_offset (code + i);
1695 emit_bytes (acfg, code + i, offset);
1696 emit_symbol_diff (acfg, "got", ".", offset);
1697
1698 i += offset + 4 - 1;
1699 skip = TRUE;
1700 break;
1701 }
1702 default: {
1703 if (!is_got_patch (patch_info->type))
1704 break;
1705
1706 /*
1707 * If this patch is a call, try emitting a direct call instead of
1708 * through a PLT entry. This is possible if the called method is in
1709 * the same assembly and requires no initialization.
1710 */
1711 direct_call = FALSE;
1712 if (!got_only && (patch_info->type == MONO_PATCH_INFO_METHOD) && (patch_info->data.method->klass->image == method->klass->image)) {
1713 MonoCompile *callee_cfg = g_hash_table_lookup (acfg->method_to_cfg, patch_info->data.method);
1714 if (callee_cfg) {
1715 gboolean direct_callable = TRUE;
1716
1717 if (direct_callable && !(!callee_cfg->has_got_slots && (callee_cfg->method->klass->flags & TYPE_ATTRIBUTE_BEFORE_FIELD_INIT)))
1718 direct_callable = FALSE;
1719 if ((callee_cfg->method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) && method->wrapper_type != MONO_WRAPPER_SYNCHRONIZED)
1720 // FIXME: Maybe call the wrapper directly ?
1721 direct_callable = FALSE;
1722 if (direct_callable) {
1723 //printf ("DIRECT: %s %s\n", method ? mono_method_full_name (method, TRUE) : "", mono_method_full_name (callee_cfg->method, TRUE));
1724 direct_call = TRUE;
1725 sprintf (direct_call_target, ".Lm_%x", get_method_index (acfg, callee_cfg->orig_method));
1726 patch_info->type = MONO_PATCH_INFO_NONE;
1727 acfg->stats.direct_calls ++;
1728 }
1729 }
1730
1731 acfg->stats.all_calls ++;
1732 }
1733
1734 if (!got_only && !direct_call) {
1735 int plt_offset = get_plt_offset (acfg, patch_info);
1736 if (plt_offset != -1) {
1737 /* This patch has a PLT entry, so we must emit a call to the PLT entry */
1738 direct_call = TRUE;
1739 sprintf (direct_call_target, ".Lp_%d", plt_offset);
1740
1741 /* Nullify the patch */
1742 patch_info->type = MONO_PATCH_INFO_NONE;
1743 }
1744 }
1745
1746 if (direct_call) {
1747 int call_size;
1748
1749 arch_emit_direct_call (acfg, direct_call_target, &call_size);
1750 i += call_size - 1;
1751 } else {
1752 int code_size;
1753
1754 got_slot = get_got_offset (acfg, patch_info);
1755
1756 arch_emit_got_access (acfg, code + i, got_slot, &code_size);
1757 i += code_size - 1;
1758 }
1759 skip = TRUE;
1760 }
1761 }
1762 }
1763 #endif /* MONO_ARCH_AOT_SUPPORTED */
1764
1765 if (!skip) {
1766 /* Find next patch */
1767 patch_info = NULL;
1768 for (pindex = start_index; pindex < patches->len; ++pindex) {
1769 patch_info = g_ptr_array_index (patches, pindex);
1770 if (patch_info->ip.i >= i)
1771 break;
1772 }
1773
1774 /* Try to emit multiple bytes at once */
1775 if (pindex < patches->len && patch_info->ip.i > i) {
1776 emit_bytes (acfg, code + i, patch_info->ip.i - i);
1777 i = patch_info->ip.i - 1;
1778 } else {
1779 emit_bytes (acfg, code + i, 1);
1780 }
1781 }
1782 }
1783 }
1784
1785 static void
1786 emit_method_code (MonoAotCompile *acfg, MonoCompile *cfg)
1787 {
1788 MonoMethod *method;
1789 int method_index;
1790 guint8 *code;
1791 char symbol [128];
1792 int func_alignment = 16;
1793 MonoMethodHeader *header;
1794
1795 method = cfg->orig_method;
1796 code = cfg->native_code;
1797 header = mono_method_get_header (method);
1798
1799 method_index = get_method_index (acfg, method);
1800
1801 /* Make the labels local */
1802 sprintf (symbol, ".Lm_%x", method_index);
1803
1804 emit_alignment (acfg, func_alignment);
1805 emit_label (acfg, symbol);
1806
1807 if (acfg->aot_opts.write_symbols && acfg->use_bin_writer) {
1808 char *full_name;
1809 /* Emit a local symbol into the symbol table */
1810 full_name = mono_method_full_name (method, TRUE);
1811 sprintf (symbol, ".Lme_%x", method_index);
1812 emit_local_symbol (acfg, full_name, symbol, TRUE);
1813 emit_label (acfg, full_name);
1814 g_free (full_name);
1815 }
1816
1817 if (cfg->verbose_level > 0)
1818 g_print ("Method %s emitted as %s\n", mono_method_full_name (method, TRUE), symbol);
1819
1820 acfg->stats.code_size += cfg->code_len;
1821
1822 acfg->cfgs [method_index]->got_offset = acfg->got_offset;
1823
1824 emit_and_reloc_code (acfg, method, code, cfg->code_len, cfg->patch_info, FALSE);
1825
1826 emit_line (acfg);
1827
1828 sprintf (symbol, ".Lme_%x", method_index);
1829 emit_label (acfg, symbol);
1830 }
1831
1832 /**
1833 * encode_patch:
1834 *
1835 * Encode PATCH_INFO into its disk representation.
1836 */
1837 static void
1838 encode_patch (MonoAotCompile *acfg, MonoJumpInfo *patch_info, guint8 *buf, guint8 **endbuf)
1839 {
1840 guint8 *p = buf;
1841
1842 switch (patch_info->type) {
1843 case MONO_PATCH_INFO_NONE:
1844 break;
1845 case MONO_PATCH_INFO_IMAGE:
1846 encode_value (get_image_index (acfg, patch_info->data.image), p, &p);
1847 break;
1848 case MONO_PATCH_INFO_METHOD_REL:
1849 encode_value ((gint)patch_info->data.offset, p, &p);
1850 break;
1851 case MONO_PATCH_INFO_SWITCH: {
1852 gpointer *table = (gpointer *)patch_info->data.table->table;
1853 int k;
1854
1855 encode_value (patch_info->data.table->table_size, p, &p);
1856 for (k = 0; k < patch_info->data.table->table_size; k++)
1857 encode_value ((int)(gssize)table [k], p, &p);
1858 break;
1859 }
1860 case MONO_PATCH_INFO_METHODCONST:
1861 case MONO_PATCH_INFO_METHOD:
1862 case MONO_PATCH_INFO_METHOD_JUMP:
1863 case MONO_PATCH_INFO_ICALL_ADDR:
1864 case MONO_PATCH_INFO_METHOD_RGCTX:
1865 encode_method_ref (acfg, patch_info->data.method, p, &p);
1866 break;
1867 case MONO_PATCH_INFO_INTERNAL_METHOD:
1868 case MONO_PATCH_INFO_JIT_ICALL_ADDR: {
1869 guint32 len = strlen (patch_info->data.name);
1870
1871 encode_value (len, p, &p);
1872
1873 memcpy (p, patch_info->data.name, len);
1874 p += len;
1875 *p++ = '\0';
1876 break;
1877 }
1878 case MONO_PATCH_INFO_LDSTR: {
1879 guint32 image_index = get_image_index (acfg, patch_info->data.token->image);
1880 guint32 token = patch_info->data.token->token;
1881 g_assert (mono_metadata_token_code (token) == MONO_TOKEN_STRING);
1882 encode_value (image_index, p, &p);
1883 encode_value (patch_info->data.token->token - MONO_TOKEN_STRING, p, &p);
1884 break;
1885 }
1886 case MONO_PATCH_INFO_RVA:
1887 case MONO_PATCH_INFO_DECLSEC:
1888 case MONO_PATCH_INFO_LDTOKEN:
1889 case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
1890 encode_value (get_image_index (acfg, patch_info->data.token->image), p, &p);
1891 encode_value (patch_info->data.token->token, p, &p);
1892 encode_value (patch_info->data.token->has_context, p, &p);
1893 if (patch_info->data.token->has_context)
1894 encode_generic_context (acfg, &patch_info->data.token->context, p, &p);
1895 break;
1896 case MONO_PATCH_INFO_EXC_NAME: {
1897 MonoClass *ex_class;
1898
1899 ex_class =
1900 mono_class_from_name (mono_defaults.exception_class->image,
1901 "System", patch_info->data.target);
1902 g_assert (ex_class);
1903 encode_klass_ref (acfg, ex_class, p, &p);
1904 break;
1905 }
1906 case MONO_PATCH_INFO_R4:
1907 encode_value (*((guint32 *)patch_info->data.target), p, &p);
1908 break;
1909 case MONO_PATCH_INFO_R8:
1910 encode_value (*((guint32 *)patch_info->data.target), p, &p);
1911 encode_value (*(((guint32 *)patch_info->data.target) + 1), p, &p);
1912 break;
1913 case MONO_PATCH_INFO_VTABLE:
1914 case MONO_PATCH_INFO_CLASS:
1915 case MONO_PATCH_INFO_IID:
1916 case MONO_PATCH_INFO_ADJUSTED_IID:
1917 encode_klass_ref (acfg, patch_info->data.klass, p, &p);
1918 break;
1919 case MONO_PATCH_INFO_CLASS_INIT:
1920 case MONO_PATCH_INFO_DELEGATE_TRAMPOLINE:
1921 encode_klass_ref (acfg, patch_info->data.klass, p, &p);
1922 break;
1923 case MONO_PATCH_INFO_FIELD:
1924 case MONO_PATCH_INFO_SFLDA:
1925 encode_field_info (acfg, patch_info->data.field, p, &p);
1926 break;
1927 case MONO_PATCH_INFO_INTERRUPTION_REQUEST_FLAG:
1928 break;
1929 case MONO_PATCH_INFO_RGCTX_FETCH: {
1930 MonoJumpInfoRgctxEntry *entry = patch_info->data.rgctx_entry;
1931
1932 encode_method_ref (acfg, entry->method, p, &p);
1933 encode_value (entry->in_mrgctx, p, &p);
1934 encode_value (entry->info_type, p, &p);
1935 encode_value (entry->data->type, p, &p);
1936 encode_patch (acfg, entry->data, p, &p);
1937 break;
1938 }
1939 case MONO_PATCH_INFO_GENERIC_CLASS_INIT:
1940 case MONO_PATCH_INFO_MONITOR_ENTER:
1941 case MONO_PATCH_INFO_MONITOR_EXIT:
1942 break;
1943 default:
1944 g_warning ("unable to handle jump info %d", patch_info->type);
1945 g_assert_not_reached ();
1946 }
1947
1948 *endbuf = p;
1949 }
1950
1951 static void
1952 encode_patch_list (MonoAotCompile *acfg, GPtrArray *patches, int n_patches, int first_got_offset, guint8 *buf, guint8 **endbuf)
1953 {
1954 guint8 *p = buf;
1955 guint32 last_offset, j, pindex;
1956 MonoJumpInfo *patch_info;
1957
1958 encode_value (n_patches, p, &p);
1959
1960 if (n_patches)
1961 encode_value (first_got_offset, p, &p);
1962
1963 /* First encode the type+position table */
1964 last_offset = 0;
1965 j = 0;
1966 for (pindex = 0; pindex < patches->len; ++pindex) {
1967 guint32 offset;
1968 patch_info = g_ptr_array_index (patches, pindex);
1969
1970 if (patch_info->type == MONO_PATCH_INFO_NONE)
1971 /* Nothing to do */
1972 continue;
1973
1974 j ++;
1975 //printf ("T: %d O: %d.\n", patch_info->type, patch_info->ip.i);
1976 offset = patch_info->ip.i - last_offset;
1977 last_offset = patch_info->ip.i;
1978
1979 /* Only the type is needed */
1980 *p = patch_info->type;
1981 p++;
1982 }
1983
1984 /* Then encode the other info */
1985 for (pindex = 0; pindex < patches->len; ++pindex) {
1986 patch_info = g_ptr_array_index (patches, pindex);
1987
1988 if (is_shared_got_patch (patch_info)) {
1989 guint32 offset = get_got_offset (acfg, patch_info);
1990 encode_value (offset, p, &p);
1991 } else {
1992 encode_patch (acfg, patch_info, p, &p);
1993 }
1994 }
1995
1996 *endbuf = p;
1997 }
1998
1999 static void
2000 emit_method_info (MonoAotCompile *acfg, MonoCompile *cfg)
2001 {
2002 MonoMethod *method;
2003 GList *l;
2004 int pindex, buf_size, n_patches;
2005 guint8 *code;
2006 char symbol [128];
2007 GPtrArray *patches;
2008 MonoJumpInfo *patch_info;
2009 MonoMethodHeader *header;
2010 guint32 method_index;
2011 guint8 *p, *buf;
2012 guint32 first_got_offset;
2013
2014 method = cfg->orig_method;
2015 code = cfg->native_code;
2016 header = mono_method_get_header (method);
2017
2018 method_index = get_method_index (acfg, method);
2019
2020 /* Make the labels local */
2021 sprintf (symbol, ".Lm_%x_p", method_index);
2022
2023 /* Sort relocations */
2024 patches = g_ptr_array_new ();
2025 for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next)
2026 g_ptr_array_add (patches, patch_info);
2027 g_ptr_array_sort (patches, compare_patches);
2028
2029 first_got_offset = acfg->cfgs [method_index]->got_offset;
2030
2031 /**********************/
2032 /* Encode method info */
2033 /**********************/
2034
2035 buf_size = (patches->len < 1000) ? 40960 : 40960 + (patches->len * 64);
2036 p = buf = g_malloc (buf_size);
2037
2038 if (mono_class_get_cctor (method->klass))
2039 encode_klass_ref (acfg, method->klass, p, &p);
2040 else
2041 /* Not needed when loading the method */
2042 encode_value (0, p, &p);
2043
2044 /* String table */
2045 if (cfg->opt & MONO_OPT_SHARED) {
2046 encode_value (g_list_length (cfg->ldstr_list), p, &p);
2047 for (l = cfg->ldstr_list; l; l = l->next) {
2048 encode_value ((long)l->data, p, &p);
2049 }
2050 }
2051 else
2052 /* Used only in shared mode */
2053 g_assert (!cfg->ldstr_list);
2054
2055 n_patches = 0;
2056 for (pindex = 0; pindex < patches->len; ++pindex) {
2057 patch_info = g_ptr_array_index (patches, pindex);
2058
2059 if ((patch_info->type == MONO_PATCH_INFO_GOT_OFFSET) ||
2060 (patch_info->type == MONO_PATCH_INFO_NONE)) {
2061 patch_info->type = MONO_PATCH_INFO_NONE;
2062 /* Nothing to do */
2063 continue;
2064 }
2065
2066 if ((patch_info->type == MONO_PATCH_INFO_IMAGE) && (patch_info->data.image == acfg->image)) {
2067 /* Stored in a GOT slot initialized at module load time */
2068 patch_info->type = MONO_PATCH_INFO_NONE;
2069 continue;
2070 }
2071
2072 if (is_plt_patch (patch_info)) {
2073 /* Calls are made through the PLT */
2074 patch_info->type = MONO_PATCH_INFO_NONE;
2075 continue;
2076 }
2077
2078 n_patches ++;
2079 }
2080
2081 if (n_patches)
2082 g_assert (cfg->has_got_slots);
2083
2084 encode_patch_list (acfg, patches, n_patches, first_got_offset, p, &p);
2085
2086 acfg->stats.info_size += p - buf;
2087
2088 /* Emit method info */
2089
2090 emit_label (acfg, symbol);
2091
2092 g_assert (p - buf < buf_size);
2093 emit_bytes (acfg, buf, p - buf);
2094 g_free (buf);
2095 }
2096
2097 static void
2098 emit_exception_debug_info (MonoAotCompile *acfg, MonoCompile *cfg)
2099 {
2100 MonoMethod *method;
2101 int k, buf_size, method_index;
2102 guint32 debug_info_size;
2103 guint8 *code;
2104 char symbol [128];
2105 MonoMethodHeader *header;
2106 guint8 *p, *buf, *debug_info;
2107 MonoJitInfo *jinfo = cfg->jit_info;
2108 guint32 flags;
2109 gboolean use_unwind_ops = FALSE;
2110
2111 method = cfg->orig_method;
2112 code = cfg->native_code;
2113 header = mono_method_get_header (method);
2114
2115 method_index = get_method_index (acfg, method);
2116
2117 /* Make the labels local */
2118 sprintf (symbol, ".Le_%x_p", method_index);
2119
2120 mono_debug_serialize_debug_info (cfg, &debug_info, &debug_info_size);
2121
2122 buf_size = header->num_clauses * 256 + debug_info_size + 1024;
2123 p = buf = g_malloc (buf_size);
2124
2125 #ifdef MONO_ARCH_HAVE_XP_UNWIND
2126 use_unwind_ops = cfg->unwind_ops != NULL;
2127 #endif
2128
2129 flags = (jinfo->has_generic_jit_info ? 1 : 0) | (use_unwind_ops ? 2 : 0);
2130
2131 encode_value (jinfo->code_size, p, &p);
2132 encode_value (flags, p, &p);
2133
2134 if (use_unwind_ops) {
2135 guint32 encoded_len;
2136 guint8 *encoded;
2137
2138 /*
2139 * This is a duplicate of the data in the .debug_frame section, but that
2140 * section cannot be accessed using the dl interface.
2141 */
2142 encoded = mono_unwind_ops_encode (cfg->unwind_ops, &encoded_len);
2143 encode_value (encoded_len, p, &p);
2144 memcpy (p, encoded, encoded_len);
2145 p += encoded_len;
2146 g_free (encoded);
2147 } else {
2148 encode_value (jinfo->used_regs, p, &p);
2149 }
2150
2151 /* Exception table */
2152 if (header->num_clauses) {
2153 for (k = 0; k < header->num_clauses; ++k) {
2154 MonoJitExceptionInfo *ei = &jinfo->clauses [k];
2155
2156 encode_value (ei->exvar_offset, p, &p);
2157
2158 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER)
2159 encode_value ((gint)((guint8*)ei->data.filter - code), p, &p);
2160
2161 encode_value ((gint)((guint8*)ei->try_start - code), p, &p);
2162 encode_value ((gint)((guint8*)ei->try_end - code), p, &p);
2163 encode_value ((gint)((guint8*)ei->handler_start - code), p, &p);
2164 }
2165 }
2166
2167 if (jinfo->has_generic_jit_info) {
2168 MonoGenericJitInfo *gi = mono_jit_info_get_generic_jit_info (jinfo);
2169
2170 encode_value (gi->has_this ? 1 : 0, p, &p);
2171 encode_value (gi->this_reg, p, &p);
2172 encode_value (gi->this_offset, p, &p);
2173
2174 /*
2175 * Need to encode jinfo->method too, since it is not equal to 'method'
2176 * when using generic sharing.
2177 */
2178 encode_method_ref (acfg, jinfo->method, p, &p);
2179 }
2180
2181 g_assert (debug_info_size < buf_size);
2182
2183 encode_value (debug_info_size, p, &p);
2184 if (debug_info_size) {
2185 memcpy (p, debug_info, debug_info_size);
2186 p += debug_info_size;
2187 g_free (debug_info);
2188 }
2189
2190 acfg->stats.ex_info_size += p - buf;
2191
2192 /* Emit info */
2193
2194 emit_label (acfg, symbol);
2195
2196 g_assert (p - buf < buf_size);
2197 emit_bytes (acfg, buf, p - buf);
2198 g_free (buf);
2199 }
2200
2201 static void
2202 emit_klass_info (MonoAotCompile *acfg, guint32 token)
2203 {
2204 MonoClass *klass = mono_class_get (acfg->image, token);
2205 guint8 *p, *buf;
2206 int i, buf_size;
2207 char symbol [128];
2208 gboolean no_special_static, cant_encode;
2209 gpointer iter = NULL;
2210
2211 buf_size = 10240 + (klass->vtable_size * 16);
2212 p = buf = g_malloc (buf_size);
2213
2214 g_assert (klass);
2215
2216 mono_class_init (klass);
2217
2218 mono_class_get_nested_types (klass, &iter);
2219 g_assert (klass->nested_classes_inited);
2220
2221 mono_class_setup_vtable (klass);
2222
2223 /*
2224 * Emit all the information which is required for creating vtables so
2225 * the runtime does not need to create the MonoMethod structures which
2226 * take up a lot of space.
2227 */
2228
2229 no_special_static = !mono_class_has_special_static_fields (klass);
2230
2231 /* Check whenever we have enough info to encode the vtable */
2232 cant_encode = FALSE;
2233 for (i = 0; i < klass->vtable_size; ++i) {
2234 MonoMethod *cm = klass->vtable [i];
2235
2236 if (cm && mono_method_signature (cm)->is_inflated && !g_hash_table_lookup (acfg->token_info_hash, cm))
2237 cant_encode = TRUE;
2238 }
2239
2240 if (klass->generic_container || cant_encode) {
2241 encode_value (-1, p, &p);
2242 } else {
2243 encode_value (klass->vtable_size, p, &p);
2244 encode_value ((no_special_static << 7) | (klass->has_static_refs << 6) | (klass->has_references << 5) | ((klass->blittable << 4) | ((klass->ext && klass->ext->nested_classes) ? 1 : 0) << 3) | (klass->has_cctor << 2) | (klass->has_finalize << 1) | klass->ghcimpl, p, &p);
2245 if (klass->has_cctor)
2246 encode_method_ref (acfg, mono_class_get_cctor (klass), p, &p);
2247 if (klass->has_finalize)
2248 encode_method_ref (acfg, mono_class_get_finalizer (klass), p, &p);
2249
2250 encode_value (klass->instance_size, p, &p);
2251 encode_value (mono_class_data_size (klass), p, &p);
2252 encode_value (klass->packing_size, p, &p);
2253 encode_value (klass->min_align, p, &p);
2254
2255 for (i = 0; i < klass->vtable_size; ++i) {
2256 MonoMethod *cm = klass->vtable [i];
2257
2258 if (cm)
2259 encode_method_ref (acfg, cm, p, &p);
2260 else
2261 encode_value (0, p, &p);
2262 }
2263 }
2264
2265 acfg->stats.class_info_size += p - buf;
2266
2267 /* Emit the info */
2268 sprintf (symbol, ".LK_I_%x", token - MONO_TOKEN_TYPE_DEF - 1);
2269 emit_label (acfg, symbol);
2270
2271 g_assert (p - buf < buf_size);
2272 emit_bytes (acfg, buf, p - buf);
2273 g_free (buf);
2274 }
2275
2276 /*
2277 * Calls made from AOTed code are routed through a table of jumps similar to the
2278 * ELF PLT (Program Linkage Table). The differences are the following:
2279 * - the ELF PLT entries make an indirect jump though the GOT so they expect the
2280 * GOT pointer to be in EBX. We want to avoid this, so our table contains direct
2281 * jumps. This means the jumps need to be patched when the address of the callee is
2282 * known. Initially the PLT entries jump to code which transfers control to the
2283 * AOT runtime through the first PLT entry.
2284 */
2285 static void
2286 emit_plt (MonoAotCompile *acfg)
2287 {
2288 char symbol [128];
2289 int i;
2290
2291 emit_line (acfg);
2292 sprintf (symbol, "plt");
2293
2294 emit_section_change (acfg, ".text", 0);
2295 emit_global (acfg, symbol, TRUE);
2296 #ifdef __i386__
2297 /* This section will be made read-write by the AOT loader */
2298 emit_alignment (acfg, PAGESIZE);
2299 #else
2300 emit_alignment (acfg, 16);
2301 #endif
2302 emit_label (acfg, symbol);
2303
2304 for (i = 0; i < acfg->plt_offset; ++i) {
2305 char label [128];
2306
2307 sprintf (label, ".Lp_%d", i);
2308 emit_label (acfg, label);
2309
2310 /*
2311 * The first plt entry is used to transfer code to the AOT loader.
2312 */
2313 arch_emit_plt_entry (acfg, i);
2314 }
2315
2316 sprintf (symbol, "plt_end");
2317 emit_global (acfg, symbol, TRUE);
2318 emit_label (acfg, symbol);
2319 }
2320
2321 static G_GNUC_UNUSED void
2322 emit_named_code (MonoAotCompile *acfg, const char *name, guint8 *code,
2323 guint32 code_size, int got_offset, MonoJumpInfo *ji, GSList *unwind_ops)
2324 {
2325 char symbol [256];
2326 guint32 buf_size;
2327 MonoJumpInfo *patch_info;
2328 guint8 *buf, *p;
2329 GPtrArray *patches;
2330
2331 /* Emit code */
2332
2333 sprintf (symbol, "%s", name);
2334
2335 emit_section_change (acfg, ".text", 0);
2336 emit_global (acfg, symbol, TRUE);
2337 emit_alignment (acfg, 16);
2338 emit_label (acfg, symbol);
2339
2340 sprintf (symbol, ".Lnamed_%s", name);
2341 emit_label (acfg, symbol);
2342
2343 /*
2344 * The code should access everything through the GOT, so we pass
2345 * TRUE here.
2346 */
2347 emit_and_reloc_code (acfg, NULL, code, code_size, ji, TRUE);
2348
2349 /* Emit info */
2350
2351 /* Sort relocations */
2352 patches = g_ptr_array_new ();
2353 for (patch_info = ji; patch_info; patch_info = patch_info->next)
2354 g_ptr_array_add (patches, patch_info);
2355 g_ptr_array_sort (patches, compare_patches);
2356
2357 buf_size = patches->len * 128 + 128;
2358 buf = g_malloc (buf_size);
2359 p = buf;
2360
2361 encode_patch_list (acfg, patches, patches->len, got_offset, p, &p);
2362 g_assert (p - buf < buf_size);
2363
2364 sprintf (symbol, "%s_p", name);
2365
2366 emit_section_change (acfg, ".text", 0);
2367 emit_global (acfg, symbol, FALSE);
2368 emit_label (acfg, symbol);
2369
2370 emit_bytes (acfg, buf, p - buf);
2371
2372 /* Emit debug info */
2373 if (unwind_ops) {
2374 char symbol2 [256];
2375
2376 sprintf (symbol, "%s", name);
2377 sprintf (symbol2, ".Lnamed_%s", name);
2378
2379 mono_dwarf_writer_emit_trampoline (acfg->dwarf, symbol, symbol2, NULL, NULL, code_size, unwind_ops);
2380 }
2381 }
2382
2383 /*
2384 * When running in aot-only mode, we can't create trampolines at runtime, so we create
2385 * a few, and save them in the AOT file. Normal trampolines embed their argument as a
2386 * literal inside the trampoline code, we can't do that here, so instead we embed an offset
2387 * which needs to be added to the trampoline address to get the address of the GOT slot
2388 * which contains the argument value.
2389 * The generated trampolines jump to the generic trampolines using another GOT slot, which
2390 * will be setup by the AOT loader to point to the generic trampoline code of the given
2391 * type.
2392 */
2393 static void
2394 emit_trampolines (MonoAotCompile *acfg)
2395 {
2396 char symbol [256];
2397 int i, offset;
2398 #ifdef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES
2399 int tramp_type;
2400 guint32 code_size;
2401 MonoJumpInfo *ji;
2402 guint8 *code;
2403 GSList *unwind_ops;
2404 #endif
2405
2406 if (!acfg->aot_opts.full_aot)
2407 return;
2408
2409 g_assert (acfg->image->assembly);
2410
2411 /* Currently, we only emit most trampolines into the mscorlib AOT image. */
2412 if (strcmp (acfg->image->assembly->aname.name, "mscorlib") == 0) {
2413 #ifdef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES
2414 /*
2415 * Emit the generic trampolines.
2416 *
2417 * We could save some code by treating the generic trampolines as a wrapper
2418 * method, but that approach has its own complexities, so we choose the simpler
2419 * method.
2420 */
2421 for (tramp_type = 0; tramp_type < MONO_TRAMPOLINE_NUM; ++tramp_type) {
2422 code = mono_arch_create_trampoline_code_full (tramp_type, &code_size, &ji, &unwind_ops, TRUE);
2423
2424 /* Emit trampoline code */
2425
2426 sprintf (symbol, "generic_trampoline_%d", tramp_type);
2427
2428 emit_named_code (acfg, symbol, code, code_size, acfg->got_offset, ji, unwind_ops);
2429 }
2430
2431 code = mono_arch_get_nullified_class_init_trampoline (&code_size);
2432 emit_named_code (acfg, "nullified_class_init_trampoline", code, code_size, acfg->got_offset, NULL, NULL);
2433 #if defined(__x86_64__) && defined(MONO_ARCH_MONITOR_OBJECT_REG)
2434 code = mono_arch_create_monitor_enter_trampoline_full (&code_size, &ji, TRUE);
2435 emit_named_code (acfg, "monitor_enter_trampoline", code, code_size, acfg->got_offset, ji, NULL);
2436 code = mono_arch_create_monitor_exit_trampoline_full (&code_size, &ji, TRUE);
2437 emit_named_code (acfg, "monitor_exit_trampoline", code, code_size, acfg->got_offset, ji, NULL);
2438 #endif
2439
2440 code = mono_arch_create_generic_class_init_trampoline_full (&code_size, &ji, TRUE);
2441 emit_named_code (acfg, "generic_class_init_trampoline", code, code_size, acfg->got_offset, ji, NULL);
2442
2443 /* Emit the exception related code pieces */
2444 code = mono_arch_get_restore_context_full (&code_size, &ji, TRUE);
2445 emit_named_code (acfg, "restore_context", code, code_size, acfg->got_offset, ji, NULL);
2446 code = mono_arch_get_call_filter_full (&code_size, &ji, TRUE);
2447 emit_named_code (acfg, "call_filter", code, code_size, acfg->got_offset, ji, NULL);
2448 code = mono_arch_get_throw_exception_full (&code_size, &ji, TRUE);
2449 emit_named_code (acfg, "throw_exception", code, code_size, acfg->got_offset, ji, NULL);
2450 code = mono_arch_get_rethrow_exception_full (&code_size, &ji, TRUE);
2451 emit_named_code (acfg, "rethrow_exception", code, code_size, acfg->got_offset, ji, NULL);
2452 code = mono_arch_get_throw_exception_by_name_full (&code_size, &ji, TRUE);
2453 emit_named_code (acfg, "throw_exception_by_name", code, code_size, acfg->got_offset, ji, NULL);
2454 code = mono_arch_get_throw_corlib_exception_full (&code_size, &ji, TRUE);
2455 emit_named_code (acfg, "throw_corlib_exception", code, code_size, acfg->got_offset, ji, NULL);
2456
2457 #if defined(__x86_64__)
2458 code = mono_arch_get_throw_pending_exception_full (&code_size, &ji, TRUE);
2459 emit_named_code (acfg, "throw_pending_exception", code, code_size, acfg->got_offset, ji, NULL);
2460 #endif
2461
2462 #if defined(__x86_64__) || defined(__arm__)
2463 for (i = 0; i < 128; ++i) {
2464 int offset;
2465
2466 offset = MONO_RGCTX_SLOT_MAKE_RGCTX (i);
2467 code = mono_arch_create_rgctx_lazy_fetch_trampoline_full (offset, &code_size, &ji, TRUE);
2468 sprintf (symbol, "rgctx_fetch_trampoline_%u", offset);
2469 emit_named_code (acfg, symbol, code, code_size, acfg->got_offset, ji, NULL);
2470
2471 offset = MONO_RGCTX_SLOT_MAKE_MRGCTX (i);
2472 code = mono_arch_create_rgctx_lazy_fetch_trampoline_full (offset, &code_size, &ji, TRUE);
2473 sprintf (symbol, "rgctx_fetch_trampoline_%u", offset);
2474 emit_named_code (acfg, symbol, code, code_size, acfg->got_offset, ji, NULL);
2475 }
2476 #endif
2477 #endif
2478
2479 /*
2480 * FIXME: Maybe we should use more specific trampolines (i.e. one class init for
2481 * each class).
2482 */
2483
2484 /* Reserve some entries at the end of the GOT for our use */
2485 acfg->num_trampoline_got_entries = acfg->num_aot_trampolines * 2;
2486
2487 sprintf (symbol, "trampolines");
2488
2489 emit_section_change (acfg, ".text", 0);
2490 emit_global (acfg, symbol, TRUE);
2491 emit_alignment (acfg, 16);
2492 emit_label (acfg, symbol);
2493
2494 for (i = 0; i < acfg->num_aot_trampolines; ++i) {
2495 int tramp_size = 0;
2496
2497 offset = acfg->got_offset + (i * 2);
2498
2499 arch_emit_specific_trampoline (acfg, offset, &tramp_size);
2500 if (!acfg->specific_trampoline_size) {
2501 g_assert (tramp_size);
2502 acfg->specific_trampoline_size = tramp_size;
2503 }
2504 }
2505 }
2506
2507 /* Unbox trampolines */
2508
2509 for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
2510 MonoMethod *method;
2511 guint32 token = MONO_TOKEN_METHOD_DEF | (i + 1);
2512 MonoCompile *cfg;
2513 char call_target [256];
2514
2515 method = mono_get_method (acfg->image, token, NULL);
2516
2517 cfg = g_hash_table_lookup (acfg->method_to_cfg, method);
2518 if (!cfg || !cfg->orig_method->klass->valuetype || !(method->flags & METHOD_ATTRIBUTE_VIRTUAL))
2519 continue;
2520
2521 sprintf (symbol, "unbox_trampoline_%d", i);
2522
2523 emit_section_change (acfg, ".text", 0);
2524 emit_global (acfg, symbol, TRUE);
2525 emit_label (acfg, symbol);
2526
2527 sprintf (call_target, ".Lm_%x", get_method_index (acfg, cfg->orig_method));
2528
2529 arch_emit_unbox_trampoline (acfg, cfg->orig_method, cfg->generic_sharing_context, call_target);
2530 }
2531
2532 acfg->trampoline_got_offset_base = acfg->got_offset;
2533
2534 acfg->got_offset += acfg->num_trampoline_got_entries;
2535 }
2536
2537 static gboolean
2538 str_begins_with (const char *str1, const char *str2)
2539 {
2540 int len = strlen (str2);
2541 return strncmp (str1, str2, len) == 0;
2542 }
2543
2544 static void
2545 mono_aot_parse_options (const char *aot_options, MonoAotOptions *opts)
2546 {
2547 gchar **args, **ptr;
2548
2549 args = g_strsplit (aot_options ? aot_options : "", ",", -1);
2550 for (ptr = args; ptr && *ptr; ptr ++) {
2551 const char *arg = *ptr;
2552
2553 if (str_begins_with (arg, "outfile=")) {
2554 opts->outfile = g_strdup (arg + strlen ("outfile="));
2555 } else if (str_begins_with (arg, "save-temps")) {
2556 opts->save_temps = TRUE;
2557 } else if (str_begins_with (arg, "keep-temps")) {
2558 opts->save_temps = TRUE;
2559 } else if (str_begins_with (arg, "write-symbols")) {
2560 opts->write_symbols = TRUE;
2561 } else if (str_begins_with (arg, "metadata-only")) {
2562 opts->metadata_only = TRUE;
2563 } else if (str_begins_with (arg, "bind-to-runtime-version")) {
2564 opts->bind_to_runtime_version = TRUE;
2565 } else if (str_begins_with (arg, "full")) {
2566 opts->full_aot = TRUE;
2567 /*
2568 * The no-dlsym option is only useful on the iphone, and even there,
2569 * do to other limitations of the dynamic linker, it doesn't seem to
2570 * work. So disable it for now so we don't have to support it.
2571 */
2572 /*
2573 } else if (str_begins_with (arg, "no-dlsym")) {
2574 opts->no_dlsym = TRUE;
2575 */
2576 } else if (str_begins_with (arg, "threads=")) {
2577 opts->nthreads = atoi (arg + strlen ("threads="));
2578 } else if (str_begins_with (arg, "static")) {
2579 opts->static_link = TRUE;
2580 opts->no_dlsym = TRUE;
2581 } else if (str_begins_with (arg, "asmonly")) {
2582 opts->asm_only = TRUE;
2583 } else if (str_begins_with (arg, "asmwriter")) {
2584 opts->asm_writer = TRUE;
2585 } else {
2586 fprintf (stderr, "AOT : Unknown argument '%s'.\n", arg);
2587 exit (1);
2588 }
2589 }
2590
2591 g_strfreev (args);
2592 }
2593
2594 static void
2595 add_token_info_hash (gpointer key, gpointer value, gpointer user_data)
2596 {
2597 MonoMethod *method = (MonoMethod*)key;
2598 MonoJumpInfoToken *ji = (MonoJumpInfoToken*)value;
2599 MonoJumpInfoToken *new_ji = g_new0 (MonoJumpInfoToken, 1);
2600 MonoAotCompile *acfg = user_data;
2601
2602 new_ji->image = ji->image;
2603 new_ji->token = ji->token;
2604 g_hash_table_insert (acfg->token_info_hash, method, new_ji);
2605 }
2606
2607 static gboolean
2608 can_encode_class (MonoAotCompile *acfg, MonoClass *klass)
2609 {
2610 if (klass->type_token)
2611 return TRUE;
2612 if ((klass->byval_arg.type == MONO_TYPE_VAR) || (klass->byval_arg.type == MONO_TYPE_MVAR))
2613 return TRUE;
2614 if (klass->rank)
2615 return can_encode_class (acfg, klass->element_class);
2616 return FALSE;
2617 }
2618
2619 static gboolean
2620 can_encode_patch (MonoAotCompile *acfg, MonoJumpInfo *patch_info)
2621 {
2622 switch (patch_info->type) {
2623 case MONO_PATCH_INFO_METHOD:
2624 case MONO_PATCH_INFO_METHODCONST: {
2625 MonoMethod *method = patch_info->data.method;
2626
2627 if (method->wrapper_type) {
2628 switch (method->wrapper_type) {
2629 case MONO_WRAPPER_NONE:
2630 case MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK:
2631 case MONO_WRAPPER_XDOMAIN_INVOKE:
2632 case MONO_WRAPPER_STFLD:
2633 case MONO_WRAPPER_LDFLD:
2634 case MONO_WRAPPER_LDFLDA:
2635 case MONO_WRAPPER_LDFLD_REMOTE:
2636 case MONO_WRAPPER_STFLD_REMOTE:
2637 case MONO_WRAPPER_STELEMREF:
2638 case MONO_WRAPPER_ISINST:
2639 case MONO_WRAPPER_PROXY_ISINST:
2640 case MONO_WRAPPER_ALLOC:
2641 case MONO_WRAPPER_REMOTING_INVOKE:
2642 case MONO_WRAPPER_STATIC_RGCTX_INVOKE:
2643 case MONO_WRAPPER_UNKNOWN:
2644 break;
2645 default:
2646 //printf ("Skip (wrapper call): %d -> %s\n", patch_info->type, mono_method_full_name (patch_info->data.method, TRUE));
2647 return FALSE;
2648 }
2649 } else {
2650 if (!method->token) {
2651 /* The method is part of a constructed type like Int[,].Set (). */
2652 if (!g_hash_table_lookup (acfg->token_info_hash, method)) {
2653 if (method->klass->rank)
2654 return TRUE;
2655 return FALSE;
2656 }
2657 }
2658 }
2659 break;
2660 }
2661 case MONO_PATCH_INFO_VTABLE:
2662 case MONO_PATCH_INFO_CLASS_INIT:
2663 case MONO_PATCH_INFO_DELEGATE_TRAMPOLINE:
2664 case MONO_PATCH_INFO_CLASS:
2665 case MONO_PATCH_INFO_IID:
2666 case MONO_PATCH_INFO_ADJUSTED_IID:
2667 if (!can_encode_class (acfg, patch_info->data.klass)) {
2668 //printf ("Skip: %s\n", mono_type_full_name (&patch_info->data.klass->byval_arg));
2669 return FALSE;
2670 }
2671 break;
2672 case MONO_PATCH_INFO_RGCTX_FETCH: {
2673 MonoJumpInfoRgctxEntry *entry = patch_info->data.rgctx_entry;
2674
2675 if (!can_encode_patch (acfg, entry->data))
2676 return FALSE;
2677 break;
2678 }
2679 default:
2680 break;
2681 }
2682
2683 return TRUE;
2684 }
2685
2686 static void
2687 add_generic_class (MonoAotCompile *acfg, MonoClass *klass);
2688
2689 /*
2690 * compile_method:
2691 *
2692 * AOT compile a given method.
2693 * This function might be called by multiple threads, so it must be thread-safe.
2694 */
2695 static void
2696 compile_method (MonoAotCompile *acfg, MonoMethod *method)
2697 {
2698 MonoCompile *cfg;
2699 MonoJumpInfo *patch_info;
2700 gboolean skip;
2701 int index;
2702 MonoMethod *wrapped;
2703
2704 if (acfg->aot_opts.metadata_only)
2705 return;
2706
2707 mono_acfg_lock (acfg);
2708 index = get_method_index (acfg, method);
2709 mono_acfg_unlock (acfg);
2710
2711 /* fixme: maybe we can also precompile wrapper methods */
2712 if ((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
2713 (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
2714 (method->flags & METHOD_ATTRIBUTE_ABSTRACT)) {
2715 //printf ("Skip (impossible): %s\n", mono_method_full_name (method, TRUE));
2716 return;
2717 }
2718
2719 if (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)
2720 return;
2721
2722 wrapped = mono_marshal_method_from_wrapper (method);
2723 if (wrapped && (wrapped->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) && wrapped->is_generic)
2724 // FIXME: The wrapper should be generic too, but it is not
2725 return;
2726
2727 InterlockedIncrement (&acfg->stats.mcount);
2728
2729 #if 0
2730 if (method->is_generic || method->klass->generic_container) {
2731 InterlockedIncrement (&acfg->stats.genericcount);
2732 return;
2733 }
2734 #endif
2735
2736 //acfg->aot_opts.print_skipped_methods = TRUE;
2737
2738 if (acfg->aot_opts.full_aot)
2739 mono_use_imt = FALSE;
2740
2741 /*
2742 * Since these methods are the only ones which are compiled with
2743 * AOT support, and they are not used by runtime startup/shutdown code,
2744 * the runtime will not see AOT methods during AOT compilation,so it
2745 * does not need to support them by creating a fake GOT etc.
2746 */
2747 cfg = mini_method_compile (method, acfg->opts, mono_get_root_domain (), FALSE, TRUE, 0);
2748 if (cfg->exception_type == MONO_EXCEPTION_GENERIC_SHARING_FAILED) {
2749 //printf ("F: %s\n", mono_method_full_name (method, TRUE));
2750 InterlockedIncrement (&acfg->stats.genericcount);
2751 return;
2752 }
2753 if (cfg->exception_type != MONO_EXCEPTION_NONE) {
2754 /* Let the exception happen at runtime */
2755 return;
2756 }
2757
2758 if (cfg->disable_aot) {
2759 if (acfg->aot_opts.print_skipped_methods)
2760 printf ("Skip (disabled): %s\n", mono_method_full_name (method, TRUE));
2761 InterlockedIncrement (&acfg->stats.ocount);
2762 mono_destroy_compile (cfg);
2763 return;
2764 }
2765
2766 /* Nullify patches which need no aot processing */
2767 for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
2768 switch (patch_info->type) {
2769 case MONO_PATCH_INFO_LABEL:
2770 case MONO_PATCH_INFO_BB:
2771 patch_info->type = MONO_PATCH_INFO_NONE;
2772 break;
2773 default:
2774 break;
2775 }
2776 }
2777
2778 /* Collect method->token associations from the cfg */
2779 mono_acfg_lock (acfg);
2780 g_hash_table_foreach (cfg->token_info_hash, add_token_info_hash, acfg);
2781 mono_acfg_unlock (acfg);
2782
2783 /*
2784 * Check for absolute addresses.
2785 */
2786 skip = FALSE;
2787 for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
2788 switch (patch_info->type) {
2789 case MONO_PATCH_INFO_ABS:
2790 /* unable to handle this */
2791 skip = TRUE;
2792 break;
2793 default:
2794 break;
2795 }
2796 }
2797
2798 if (skip) {
2799 if (acfg->aot_opts.print_skipped_methods)
2800 printf ("Skip (abs call): %s\n", mono_method_full_name (method, TRUE));
2801 InterlockedIncrement (&acfg->stats.abscount);
2802 mono_destroy_compile (cfg);
2803 return;
2804 }
2805
2806 /* Lock for the rest of the code */
2807 mono_acfg_lock (acfg);
2808
2809 /*
2810 * Check for methods/klasses we can't encode.
2811 */
2812 skip = FALSE;
2813 for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
2814 if (!can_encode_patch (acfg, patch_info))
2815 skip = TRUE;
2816 }
2817
2818 if (skip) {
2819 if (acfg->aot_opts.print_skipped_methods)
2820 printf ("Skip (patches): %s\n", mono_method_full_name (method, TRUE));
2821 acfg->stats.ocount++;
2822 mono_destroy_compile (cfg);
2823 mono_acfg_unlock (acfg);
2824 return;
2825 }
2826
2827 /* Adds generic instances referenced by this method */
2828 for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
2829 switch (patch_info->type) {
2830 case MONO_PATCH_INFO_METHOD: {
2831 MonoMethod *m = patch_info->data.method;
2832 if (m->is_inflated) {
2833 if (!(mono_class_generic_sharing_enabled (m->klass) &&
2834 mono_method_is_generic_sharable_impl (m, FALSE)) &&
2835 !method_has_type_vars (m)) {
2836 if (m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
2837 if (acfg->aot_opts.full_aot)
2838 add_extra_method (acfg, mono_marshal_get_native_wrapper (m, TRUE, TRUE));
2839 } else {
2840 add_extra_method (acfg, m);
2841 }
2842 }
2843 add_generic_class (acfg, m->klass);
2844 }
2845 break;
2846 }
2847 default:
2848 break;
2849 }
2850 }
2851
2852 /* Determine whenever the method has GOT slots */
2853 for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
2854 switch (patch_info->type) {
2855 case MONO_PATCH_INFO_GOT_OFFSET:
2856 case MONO_PATCH_INFO_NONE:
2857 break;
2858 case MONO_PATCH_INFO_IMAGE:
2859 /* The assembly is stored in GOT slot 0 */
2860 if (patch_info->data.image != acfg->image)
2861 cfg->has_got_slots = TRUE;
2862 break;
2863 default:
2864 if (!is_plt_patch (patch_info))
2865 cfg->has_got_slots = TRUE;
2866 break;
2867 }
2868 }
2869
2870 if (!cfg->has_got_slots)
2871 InterlockedIncrement (&acfg->stats.methods_without_got_slots);
2872
2873 /* Make a copy of the patch info which is in the mempool */
2874 {
2875 MonoJumpInfo *patches = NULL, *patches_end = NULL;
2876
2877 for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
2878 MonoJumpInfo *new_patch_info = mono_patch_info_dup_mp (acfg->mempool, patch_info);
2879
2880 if (!patches)
2881 patches = new_patch_info;
2882 else
2883 patches_end->next = new_patch_info;
2884 patches_end = new_patch_info;
2885 }
2886 cfg->patch_info = patches;
2887 }
2888 /* Make a copy of the unwind info */
2889 {
2890 GSList *l, *unwind_ops;
2891 MonoUnwindOp *op;
2892
2893 unwind_ops = NULL;
2894 for (l = cfg->unwind_ops; l; l = l->next) {
2895 op = mono_mempool_alloc (acfg->mempool, sizeof (MonoUnwindOp));
2896 memcpy (op, l->data, sizeof (MonoUnwindOp));
2897 unwind_ops = g_slist_prepend_mempool (acfg->mempool, unwind_ops, op);
2898 }
2899 cfg->unwind_ops = g_slist_reverse (unwind_ops);
2900 }
2901 /* Make a copy of the argument/local info */
2902 {
2903 MonoInst **args, **locals;
2904 MonoMethodSignature *sig;
2905 MonoMethodHeader *header;
2906 int i;
2907
2908 sig = mono_method_signature (method);
2909 args = mono_mempool_alloc (acfg->mempool, sizeof (MonoInst*) * (sig->param_count + sig->hasthis));
2910 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
2911 args [i] = mono_mempool_alloc (acfg->mempool, sizeof (MonoInst));
2912 memcpy (args [i], cfg->args [i], sizeof (MonoInst));
2913 }
2914 cfg->args = args;
2915
2916 header = mono_method_get_header (method);
2917 locals = mono_mempool_alloc (acfg->mempool, sizeof (MonoInst*) * header->num_locals);
2918 for (i = 0; i < header->num_locals; ++i) {
2919 locals [i] = mono_mempool_alloc (acfg->mempool, sizeof (MonoInst));
2920 memcpy (locals [i], cfg->locals [i], sizeof (MonoInst));
2921 }
2922 cfg->locals = locals;
2923 }
2924
2925 /* Free some fields used by cfg to conserve memory */
2926 mono_mempool_destroy (cfg->mempool);
2927 cfg->mempool = NULL;
2928 g_free (cfg->varinfo);
2929 cfg->varinfo = NULL;
2930 g_free (cfg->vars);
2931 cfg->vars = NULL;
2932 if (cfg->rs) {
2933 mono_regstate_free (cfg->rs);
2934 cfg->rs = NULL;
2935 }
2936
2937 //printf ("Compile: %s\n", mono_method_full_name (method, TRUE));
2938
2939 while (index >= acfg->cfgs_size) {
2940 MonoCompile **new_cfgs;
2941 int new_size;
2942
2943 new_size = acfg->cfgs_size * 2;
2944 new_cfgs = g_new0 (MonoCompile*, new_size);
2945 memcpy (new_cfgs, acfg->cfgs, sizeof (MonoCompile*) * acfg->cfgs_size);
2946 g_free (acfg->cfgs);
2947 acfg->cfgs = new_cfgs;
2948 acfg->cfgs_size = new_size;
2949 }
2950 acfg->cfgs [index] = cfg;
2951
2952 g_hash_table_insert (acfg->method_to_cfg, cfg->orig_method, cfg);
2953
2954 if (cfg->orig_method->wrapper_type)
2955 g_ptr_array_add (acfg->extra_methods, cfg->orig_method);
2956
2957 mono_acfg_unlock (acfg);
2958
2959 InterlockedIncrement (&acfg->stats.ccount);
2960 }
2961
2962 static void
2963 compile_thread_main (gpointer *user_data)
2964 {
2965 MonoDomain *domain = user_data [0];
2966 MonoAotCompile *acfg = user_data [1];
2967 GPtrArray *methods = user_data [2];
2968 int i;
2969
2970 mono_thread_attach (domain);
2971
2972 for (i = 0; i < methods->len; ++i)
2973 compile_method (acfg, g_ptr_array_index (methods, i));
2974 }
2975
2976 static void
2977 load_profile_files (MonoAotCompile *acfg)
2978 {
2979 FILE *infile;
2980 char *tmp;
2981 int file_index, res, method_index, i;
2982 char ver [256];
2983 guint32 token;
2984 GList *unordered;
2985
2986 file_index = 0;
2987 while (TRUE) {
2988 tmp = g_strdup_printf ("%s/.mono/aot-profile-data/%s-%s-%d", g_get_home_dir (), acfg->image->assembly_name, acfg->image->guid, file_index);
2989
2990 if (!g_file_test (tmp, G_FILE_TEST_IS_REGULAR)) {
2991 g_free (tmp);
2992 break;
2993 }
2994
2995 infile = fopen (tmp, "r");
2996 g_assert (infile);
2997
2998 printf ("Using profile data file '%s'\n", tmp);
2999 g_free (tmp);
3000
3001 file_index ++;
3002
3003 res = fscanf (infile, "%32s\n", ver);
3004 if ((res != 1) || strcmp (ver, "#VER:1") != 0) {
3005 printf ("Profile file has wrong version or invalid.\n");
3006 fclose (infile);
3007 continue;
3008 }
3009
3010 while (TRUE) {
3011 res = fscanf (infile, "%d\n", &token);
3012 if (res < 1)
3013 break;
3014
3015 method_index = mono_metadata_token_index (token) - 1;
3016
3017 if (!g_list_find (acfg->method_order, GUINT_TO_POINTER (method_index)))
3018 acfg->method_order = g_list_append (acfg->method_order, GUINT_TO_POINTER (method_index));
3019 }
3020 fclose (infile);
3021 }
3022
3023 /* Add missing methods */
3024 unordered = NULL;
3025 for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
3026 if (!g_list_find (acfg->method_order, GUINT_TO_POINTER (i)))
3027 unordered = g_list_prepend (unordered, GUINT_TO_POINTER (i));
3028 }
3029 unordered = g_list_reverse (unordered);
3030 if (acfg->method_order)
3031 g_list_last (acfg->method_order)->next = unordered;
3032 else
3033 acfg->method_order = unordered;
3034 }
3035
3036 /**
3037 * alloc_got_slots:
3038 *
3039 * Collect all patches which have shared GOT entries and alloc entries for them. The
3040 * rest will get entries allocated during emit_code ().
3041 */
3042 static void
3043 alloc_got_slots (MonoAotCompile *acfg)
3044 {
3045 int i;
3046 GList *l;
3047 MonoJumpInfo *ji;
3048
3049 /* Slot 0 is reserved for the address of the current assembly */
3050 ji = mono_mempool_alloc0 (acfg->mempool, sizeof (MonoAotCompile));
3051 ji->type = MONO_PATCH_INFO_IMAGE;
3052 ji->data.image = acfg->image;
3053
3054 get_shared_got_offset (acfg, ji);
3055
3056 for (l = acfg->method_order; l != NULL; l = l->next) {
3057 i = GPOINTER_TO_UINT (l->data);
3058
3059 if (acfg->cfgs [i]) {
3060 MonoCompile *cfg = acfg->cfgs [i];
3061
3062 for (ji = cfg->patch_info; ji; ji = ji->next) {
3063 if (is_shared_got_patch (ji))
3064 get_shared_got_offset (acfg, ji);
3065 }
3066 }
3067 }
3068 }
3069
3070 static void
3071 emit_code (MonoAotCompile *acfg)
3072 {
3073 int i;
3074 char symbol [256];
3075 GList *l;
3076
3077 sprintf (symbol, "methods");
3078 emit_section_change (acfg, ".text", 0);
3079 emit_global (acfg, symbol, TRUE);
3080 emit_alignment (acfg, 8);
3081 emit_label (acfg, symbol);
3082
3083 /*
3084 * Emit some padding so the local symbol for the first method doesn't have the
3085 * same address as 'methods'.
3086 */
3087 emit_zero_bytes (acfg, 16);
3088
3089 for (l = acfg->method_order; l != NULL; l = l->next) {
3090 i = GPOINTER_TO_UINT (l->data);
3091
3092 if (acfg->cfgs [i])
3093 emit_method_code (acfg, acfg->cfgs [i]);
3094 }
3095
3096 sprintf (symbol, "methods_end");
3097 emit_section_change (acfg, ".text", 0);
3098 emit_global (acfg, symbol, FALSE);
3099 emit_alignment (acfg, 8);
3100 emit_label (acfg, symbol);
3101
3102 sprintf (symbol, "method_offsets");
3103 emit_section_change (acfg, ".text", 1);
3104 emit_global (acfg, symbol, FALSE);
3105 emit_alignment (acfg, 8);
3106 emit_label (acfg, symbol);
3107
3108 for (i = 0; i < acfg->nmethods; ++i) {
3109 if (acfg->cfgs [i]) {
3110 sprintf (symbol, ".Lm_%x", i);
3111 emit_symbol_diff (acfg, symbol, "methods", 0);
3112 } else {
3113 emit_int32 (acfg, 0xffffffff);
3114 }
3115 }
3116 emit_line (acfg);
3117 }
3118
3119 static void
3120 emit_info (MonoAotCompile *acfg)
3121 {
3122 int i;
3123 char symbol [256];
3124 GList *l;
3125
3126 /* Emit method info */
3127 sprintf (symbol, "method_info");
3128 emit_section_change (acfg, ".text", 1);
3129 emit_global (acfg, symbol, FALSE);
3130 emit_alignment (acfg, 8);
3131 emit_label (acfg, symbol);
3132
3133 /* To reduce size of generated assembly code */
3134 sprintf (symbol, "mi");
3135 emit_label (acfg, symbol);
3136
3137 for (l = acfg->method_order; l != NULL; l = l->next) {
3138 i = GPOINTER_TO_UINT (l->data);
3139
3140 if (acfg->cfgs [i])
3141 emit_method_info (acfg, acfg->cfgs [i]);
3142 }
3143
3144 sprintf (symbol, "method_info_offsets");
3145 emit_section_change (acfg, ".text", 1);
3146 emit_global (acfg, symbol, FALSE);
3147 emit_alignment (acfg, 8);
3148 emit_label (acfg, symbol);
3149
3150 for (i = 0; i < acfg->nmethods; ++i) {
3151 if (acfg->cfgs [i]) {
3152 sprintf (symbol, ".Lm_%x_p", i);
3153 emit_symbol_diff (acfg, symbol, "mi", 0);
3154 } else {
3155 emit_int32 (acfg, 0);
3156 }
3157 }
3158 emit_line (acfg);
3159 }
3160
3161 /*
3162 * mono_aot_method_hash:
3163 *
3164 * Return a hash code for methods which only depends on metadata.
3165 */
3166 guint32
3167 mono_aot_method_hash (MonoMethod *method)
3168 {
3169 guint32 hash;
3170
3171 if (method->wrapper_type) {
3172 hash = g_str_hash (method->name);
3173 } else {
3174 char *full_name = mono_method_full_name (method, TRUE);
3175 // FIXME: Improve this (changing this requires bumping MONO_AOT_FILE_VERSION)
3176 hash = g_str_hash (full_name);
3177 g_free (full_name);
3178 }
3179
3180 return hash;
3181 }
3182
3183 typedef struct HashEntry {
3184 guint32 key, value, index;
3185 struct HashEntry *next;
3186 } HashEntry;
3187
3188 /*
3189 * emit_extra_methods:
3190 *
3191 * Emit methods which are not in the METHOD table, like wrappers.
3192 */
3193 static void
3194 emit_extra_methods (MonoAotCompile *acfg)
3195 {
3196 int i, table_size, buf_size;
3197 char symbol [256];
3198 guint8 *p, *buf;
3199 guint32 *info_offsets;
3200 guint32 hash;
3201 GPtrArray *table;
3202 HashEntry *entry, *new_entry;
3203 int nmethods, max_chain_length;
3204 int *chain_lengths;
3205
3206 info_offsets = g_new0 (guint32, acfg->extra_methods->len);
3207
3208 buf_size = acfg->extra_methods->len * 256 + 256;
3209 p = buf = g_malloc (buf_size);
3210
3211 /* Encode method info */
3212 nmethods = 0;
3213 /* So offsets are > 0 */
3214 *p = 0;
3215 p++;
3216 for (i = 0; i < acfg->extra_methods->len; ++i) {
3217 MonoMethod *method = g_ptr_array_index (acfg->extra_methods, i);
3218 MonoCompile *cfg = g_hash_table_lookup (acfg->method_to_cfg, method);
3219
3220 if (!cfg)
3221 continue;
3222
3223 nmethods ++;
3224 info_offsets [i] = p - buf;
3225
3226 if (method->wrapper_type) {
3227 char *name;
3228
3229 // FIXME: Optimize disk usage
3230 if (method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
3231 char *tmpsig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3232 name = g_strdup_printf ("(wrapper runtime-invoke):%s (%s)", method->name, tmpsig);
3233 g_free (tmpsig);
3234 } else if (method->wrapper_type == MONO_WRAPPER_DELEGATE_INVOKE) {
3235 char *tmpsig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3236 name = g_strdup_printf ("(wrapper delegate-invoke):%s (%s)", method->name, tmpsig);
3237 g_free (tmpsig);
3238 } else if (method->wrapper_type == MONO_WRAPPER_DELEGATE_BEGIN_INVOKE) {
3239 char *tmpsig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3240 name = g_strdup_printf ("(wrapper delegate-begin-invoke):%s (%s)", method->name, tmpsig);
3241 g_free (tmpsig);
3242 } else if (method->wrapper_type == MONO_WRAPPER_DELEGATE_END_INVOKE) {
3243 char *tmpsig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3244 name = g_strdup_printf ("(wrapper delegate-end-invoke):%s (%s)", method->name, tmpsig);
3245 g_free (tmpsig);
3246 } else {
3247 name = mono_method_full_name (cfg->orig_method, TRUE);
3248 }
3249
3250 encode_value (1, p, &p);
3251 strcpy ((char*)p, name);
3252 p += strlen (name ) + 1;
3253 g_free (name);
3254 } else {
3255 encode_value (0, p, &p);
3256 encode_method_ref (acfg, method, p, &p);
3257 }
3258
3259 g_assert ((p - buf) < buf_size);
3260 }
3261
3262 g_assert ((p - buf) < buf_size);
3263
3264 /* Emit method info */
3265 sprintf (symbol, "extra_method_info");
3266 emit_section_change (acfg, ".text", 1);
3267 emit_global (acfg, symbol, FALSE);
3268 emit_alignment (acfg, 8);
3269 emit_label (acfg, symbol);
3270
3271 emit_bytes (acfg, buf, p - buf);
3272
3273 emit_line (acfg);
3274
3275 /*
3276 * Construct a chained hash table for mapping indexes in extra_method_info to
3277 * method indexes.
3278 */
3279 table_size = g_spaced_primes_closest ((int)(nmethods * 1.5));
3280 table = g_ptr_array_sized_new (table_size);
3281 for (i = 0; i < table_size; ++i)
3282 g_ptr_array_add (table, NULL);
3283 chain_lengths = g_new0 (int, table_size);
3284 max_chain_length = 0;
3285 for (i = 0; i < acfg->extra_methods->len; ++i) {
3286 MonoMethod *method = g_ptr_array_index (acfg->extra_methods, i);
3287 MonoCompile *cfg = g_hash_table_lookup (acfg->method_to_cfg, method);
3288 guint32 key, value;
3289
3290 if (!cfg)
3291 continue;
3292
3293 key = info_offsets [i];
3294 value = get_method_index (acfg, method);
3295
3296 hash = mono_aot_method_hash (method) % table_size;
3297
3298 chain_lengths [hash] ++;
3299 max_chain_length = MAX (max_chain_length, chain_lengths [hash]);
3300
3301 /* FIXME: Allocate from the mempool */
3302 new_entry = g_new0 (HashEntry, 1);
3303 new_entry->key = key;
3304 new_entry->value = value;
3305
3306 entry = g_ptr_array_index (table, hash);
3307 if (entry == NULL) {
3308 new_entry->index = hash;
3309 g_ptr_array_index (table, hash) = new_entry;
3310 } else {
3311 while (entry->next)
3312 entry = entry->next;
3313
3314 entry->next = new_entry;
3315 new_entry->index = table->len;
3316 g_ptr_array_add (table, new_entry);
3317 }
3318 }
3319
3320 //printf ("MAX: %d\n", max_chain_length);
3321
3322 /* Emit the table */
3323 sprintf (symbol, "extra_method_table");
3324 emit_section_change (acfg, ".text", 0);
3325 emit_global (acfg, symbol, FALSE);
3326 emit_alignment (acfg, 8);
3327 emit_label (acfg, symbol);
3328
3329 g_assert (table_size < 65000);
3330 emit_int32 (acfg, table_size);
3331 g_assert (table->len < 65000);
3332 for (i = 0; i < table->len; ++i) {
3333 HashEntry *entry = g_ptr_array_index (table, i);
3334
3335 if (entry == NULL) {
3336 emit_int32 (acfg, 0);
3337 emit_int32 (acfg, 0);
3338 emit_int32 (acfg, 0);
3339 } else {
3340 g_assert (entry->key > 0);
3341 emit_int32 (acfg, entry->key);
3342 emit_int32 (acfg, entry->value);
3343 if (entry->next)
3344 emit_int32 (acfg, entry->next->index);
3345 else
3346 emit_int32 (acfg, 0);
3347 }
3348 }
3349
3350 /*
3351 * Emit a table reverse mapping method indexes to their index in extra_method_info.
3352 * This is used by mono_aot_find_jit_info ().
3353 */
3354 sprintf (symbol, "extra_method_info_offsets");
3355 emit_section_change (acfg, ".text", 0);
3356 emit_global (acfg, symbol, FALSE);
3357 emit_alignment (acfg, 8);
3358 emit_label (acfg, symbol);
3359
3360 emit_int32 (acfg, acfg->extra_methods->len);
3361 for (i = 0; i < acfg->extra_methods->len; ++i) {
3362 MonoMethod *method = g_ptr_array_index (acfg->extra_methods, i);
3363
3364 emit_int32 (acfg, get_method_index (acfg, method));
3365 emit_int32 (acfg, info_offsets [i]);
3366 }
3367 }
3368
3369 static void
3370 emit_method_order (MonoAotCompile *acfg)
3371 {
3372 int i, index, len;
3373 char symbol [256];
3374 GList *l;
3375
3376 sprintf (symbol, "method_order");
3377 emit_section_change (acfg, ".text", 1);
3378 emit_global (acfg, symbol, FALSE);
3379 emit_alignment (acfg, 8);
3380 emit_label (acfg, symbol);
3381
3382 /* First emit an index table */
3383 index = 0;
3384 len = 0;
3385 for (l = acfg->method_order; l != NULL; l = l->next) {
3386 i = GPOINTER_TO_UINT (l->data);
3387
3388 if (acfg->cfgs [i]) {
3389 if ((index % 1024) == 0) {
3390 emit_int32 (acfg, i);
3391 }
3392
3393 index ++;
3394 }
3395
3396 len ++;
3397 }
3398 emit_int32 (acfg, 0xffffff);
3399
3400 /* Then emit the whole method order */
3401 for (l = acfg->method_order; l != NULL; l = l->next) {
3402 i = GPOINTER_TO_UINT (l->data);
3403
3404 if (acfg->cfgs [i]) {
3405 emit_int32 (acfg, i);
3406 }
3407 }
3408 emit_line (acfg);
3409
3410 sprintf (symbol, "method_order_end");
3411 emit_section_change (acfg, ".text", 1);
3412 emit_global (acfg, symbol, FALSE);
3413 emit_label (acfg, symbol);
3414 }
3415
3416 static void
3417 emit_exception_info (MonoAotCompile *acfg)
3418 {
3419 int i;
3420 char symbol [256];
3421
3422 sprintf (symbol, "ex_info");
3423 emit_section_change (acfg, ".text", 1);
3424 emit_global (acfg, symbol, FALSE);
3425 emit_alignment (acfg, 8);
3426 emit_label (acfg, symbol);
3427
3428 /* To reduce size of generated assembly */
3429 sprintf (symbol, "ex");
3430 emit_label (acfg, symbol);
3431
3432 for (i = 0; i < acfg->nmethods; ++i) {
3433 if (acfg->cfgs [i])
3434 emit_exception_debug_info (acfg, acfg->cfgs [i]);
3435 }
3436
3437 sprintf (symbol, "ex_info_offsets");
3438 emit_section_change (acfg, ".text", 1);
3439 emit_global (acfg, symbol, FALSE);
3440 emit_alignment (acfg, 8);
3441 emit_label (acfg, symbol);
3442
3443 for (i = 0; i < acfg->nmethods; ++i) {
3444 if (acfg->cfgs [i]) {
3445 sprintf (symbol, ".Le_%x_p", i);
3446 emit_symbol_diff (acfg, symbol, "ex", 0);
3447 } else {
3448 emit_int32 (acfg, 0);
3449 }
3450 }
3451 emit_line (acfg);
3452 }
3453
3454 static void
3455 emit_class_info (MonoAotCompile *acfg)
3456 {
3457 int i;
3458 char symbol [256];
3459
3460 sprintf (symbol, "class_info");
3461 emit_section_change (acfg, ".text", 1);
3462 emit_global (acfg, symbol, FALSE);
3463 emit_alignment (acfg, 8);
3464 emit_label (acfg, symbol);
3465
3466 for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPEDEF].rows; ++i)
3467 emit_klass_info (acfg, MONO_TOKEN_TYPE_DEF | (i + 1));
3468
3469 sprintf (symbol, "class_info_offsets");
3470 emit_section_change (acfg, ".text", 1);
3471 emit_global (acfg, symbol, FALSE);
3472 emit_alignment (acfg, 8);
3473 emit_label (acfg, symbol);
3474
3475 for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPEDEF].rows; ++i) {
3476 sprintf (symbol, ".LK_I_%x", i);
3477 emit_symbol_diff (acfg, symbol, "class_info", 0);
3478 }
3479 emit_line (acfg);
3480 }
3481
3482 typedef struct ClassNameTableEntry {
3483 guint32 token, index;
3484 struct ClassNameTableEntry *next;
3485 } ClassNameTableEntry;
3486
3487 static void
3488 emit_class_name_table (MonoAotCompile *acfg)
3489 {
3490 int i, table_size;
3491 guint32 token, hash;
3492 MonoClass *klass;
3493 GPtrArray *table;
3494 char *full_name;
3495 char symbol [256];
3496 ClassNameTableEntry *entry, *new_entry;
3497
3498 /*
3499 * Construct a chained hash table for mapping class names to typedef tokens.
3500 */
3501 table_size = g_spaced_primes_closest ((int)(acfg->image->tables [MONO_TABLE_TYPEDEF].rows * 1.5));
3502 table = g_ptr_array_sized_new (table_size);
3503 for (i = 0; i < table_size; ++i)
3504 g_ptr_array_add (table, NULL);
3505 for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPEDEF].rows; ++i) {
3506 token = MONO_TOKEN_TYPE_DEF | (i + 1);
3507 klass = mono_class_get (acfg->image, token);
3508 full_name = mono_type_get_name_full (mono_class_get_type (klass), MONO_TYPE_NAME_FORMAT_FULL_NAME);
3509 hash = g_str_hash (full_name) % table_size;
3510 g_free (full_name);
3511
3512 /* FIXME: Allocate from the mempool */
3513 new_entry = g_new0 (ClassNameTableEntry, 1);
3514 new_entry->token = token;
3515
3516 entry = g_ptr_array_index (table, hash);
3517 if (entry == NULL) {
3518 new_entry->index = hash;
3519 g_ptr_array_index (table, hash) = new_entry;
3520 } else {
3521 while (entry->next)
3522 entry = entry->next;
3523
3524 entry->next = new_entry;
3525 new_entry->index = table->len;
3526 g_ptr_array_add (table, new_entry);
3527 }
3528 }
3529
3530 /* Emit the table */
3531 sprintf (symbol, "class_name_table");
3532 emit_section_change (acfg, ".text", 0);
3533 emit_global (acfg, symbol, FALSE);
3534 emit_alignment (acfg, 8);
3535 emit_label (acfg, symbol);
3536
3537 /* FIXME: Optimize memory usage */
3538 g_assert (table_size < 65000);
3539 emit_int16 (acfg, table_size);
3540 g_assert (table->len < 65000);
3541 for (i = 0; i < table->len; ++i) {
3542 ClassNameTableEntry *entry = g_ptr_array_index (table, i);
3543
3544 if (entry == NULL) {
3545 emit_int16 (acfg, 0);
3546 emit_int16 (acfg, 0);
3547 } else {
3548 emit_int16 (acfg, mono_metadata_token_index (entry->token));
3549 if (entry->next)
3550 emit_int16 (acfg, entry->next->index);
3551 else
3552 emit_int16 (acfg, 0);
3553 }
3554 }
3555 }
3556
3557 static void
3558 emit_image_table (MonoAotCompile *acfg)
3559 {
3560 int i;
3561 char symbol [256];
3562
3563 /*
3564 * The image table is small but referenced in a lot of places.
3565 * So we emit it at once, and reference its elements by an index.
3566 */
3567
3568 sprintf (symbol, "mono_image_table");
3569 emit_section_change (acfg, ".text", 1);
3570 emit_global (acfg, symbol, FALSE);
3571 emit_alignment (acfg, 8);
3572 emit_label (acfg, symbol);
3573
3574 emit_int32 (acfg, acfg->image_table->len);
3575 for (i = 0; i < acfg->image_table->len; i++) {
3576 MonoImage *image = (MonoImage*)g_ptr_array_index (acfg->image_table, i);
3577 MonoAssemblyName *aname = &image->assembly->aname;
3578
3579 /* FIXME: Support multi-module assemblies */
3580 g_assert (image->assembly->image == image);
3581
3582 emit_string (acfg, image->assembly_name);
3583 emit_string (acfg, image->guid);
3584 emit_string (acfg, aname->culture ? aname->culture : "");
3585 emit_string (acfg, (const char*)aname->public_key_token);
3586
3587 emit_alignment (acfg, 8);
3588 emit_int32 (acfg, aname->flags);
3589 emit_int32 (acfg, aname->major);
3590 emit_int32 (acfg, aname->minor);
3591 emit_int32 (acfg, aname->build);
3592 emit_int32 (acfg, aname->revision);
3593 }
3594 }
3595
3596 static void
3597 emit_got_info (MonoAotCompile *acfg)
3598 {
3599 char symbol [256];
3600 int i, first_plt_got_patch, buf_size;
3601 guint8 *p, *buf;
3602 guint32 *got_info_offsets;
3603
3604 /* Add the patches needed by the PLT to the GOT */
3605 acfg->plt_got_offset_base = acfg->got_offset;
3606 first_plt_got_patch = acfg->shared_patches->len;
3607 for (i = 1; i < acfg->plt_offset; ++i) {
3608 MonoJumpInfo *patch_info = g_hash_table_lookup (acfg->plt_offset_to_patch, GUINT_TO_POINTER (i));
3609
3610 g_ptr_array_add (acfg->shared_patches, patch_info);
3611 }
3612
3613 acfg->got_offset += acfg->plt_offset;
3614
3615 /**
3616 * FIXME:
3617 * - optimize offsets table.
3618 * - reduce number of exported symbols.
3619 * - emit info for a klass only once.
3620 * - determine when a method uses a GOT slot which is guaranteed to be already
3621 * initialized.
3622 * - clean up and document the code.
3623 * - use String.Empty in class libs.
3624 */
3625
3626 /* Encode info required to decode shared GOT entries */
3627 buf_size = acfg->shared_patches->len * 64;
3628 p = buf = mono_mempool_alloc (acfg->mempool, buf_size);
3629 got_info_offsets = mono_mempool_alloc (acfg->mempool, acfg->shared_patches->len * sizeof (guint32));
3630 acfg->plt_got_info_offsets = mono_mempool_alloc (acfg->mempool, acfg->plt_offset * sizeof (guint32));
3631 for (i = 0; i < acfg->shared_patches->len; ++i) {
3632 MonoJumpInfo *ji = g_ptr_array_index (acfg->shared_patches, i);
3633
3634 got_info_offsets [i] = p - buf;
3635 /* No need to encode the patch type for non-PLT patches */
3636 if (i >= first_plt_got_patch) {
3637 acfg->plt_got_info_offsets [i - first_plt_got_patch + 1] = got_info_offsets [i];
3638 encode_value (ji->type, p, &p);
3639 }
3640 encode_patch (acfg, ji, p, &p);
3641 }
3642
3643 g_assert (p - buf <= buf_size);
3644
3645 acfg->stats.got_info_size = p - buf;
3646
3647 /* Emit got_info table */
3648 sprintf (symbol, "got_info");
3649 emit_section_change (acfg, ".text", 1);
3650 emit_global (acfg, symbol, FALSE);
3651 emit_alignment (acfg, 8);
3652 emit_label (acfg, symbol);
3653
3654 emit_bytes (acfg, buf, p - buf);
3655
3656 /* Emit got_info_offsets table */
3657 sprintf (symbol, "got_info_offsets");
3658 emit_section_change (acfg, ".text", 1);
3659 emit_global (acfg, symbol, FALSE);
3660 emit_alignment (acfg, 8);
3661 emit_label (acfg, symbol);
3662
3663 for (i = 0; i < acfg->shared_patches->len; ++i)
3664 emit_int32 (acfg, got_info_offsets [i]);
3665
3666 acfg->stats.got_info_offsets_size = acfg->shared_patches->len * 4;
3667 }
3668
3669 static void
3670 emit_got (MonoAotCompile *acfg)
3671 {
3672 char symbol [256];
3673
3674 /* Don't make GOT global so accesses to it don't need relocations */
3675 sprintf (symbol, "got");
3676 emit_section_change (acfg, ".bss", 0);
3677 emit_alignment (acfg, 8);
3678 emit_label (acfg, symbol);
3679 if (acfg->got_offset > 0)
3680 emit_zero_bytes (acfg, (int)(acfg->got_offset * sizeof (gpointer)));
3681 }
3682
3683 static void
3684 emit_globals (MonoAotCompile *acfg)
3685 {
3686 char *opts_str;
3687 char *build_info;
3688
3689 emit_string_symbol (acfg, "mono_assembly_guid" , acfg->image->guid);
3690
3691 emit_string_symbol (acfg, "mono_aot_version", MONO_AOT_FILE_VERSION);
3692
3693 opts_str = g_strdup_printf ("%d", acfg->opts);
3694 emit_string_symbol (acfg, "mono_aot_opt_flags", opts_str);
3695 g_free (opts_str);
3696
3697 emit_string_symbol (acfg, "mono_aot_full_aot", acfg->aot_opts.full_aot ? "TRUE" : "FALSE");
3698
3699 if (acfg->aot_opts.bind_to_runtime_version) {
3700 build_info = mono_get_runtime_build_info ();
3701 emit_string_symbol (acfg, "mono_runtime_version", build_info);
3702 g_free (build_info);
3703 } else {
3704 emit_string_symbol (acfg, "mono_runtime_version", "");
3705 }
3706
3707 /*
3708 * Some platforms like the iphone have no working dlsym (). To work around this,
3709 * we create an ELF ctor function which will be invoked by dlopen, and which
3710 * will call a function in the AOT loader to register the symbols used by the
3711 * image.
3712 * When static linking, we emit a global which will point to the symbol table.
3713 */
3714 if (acfg->aot_opts.no_dlsym) {
3715 int i;
3716 char symbol [256];
3717
3718 if (acfg->aot_opts.static_link)
3719 /* Emit a string holding the assembly name */
3720 emit_string_symbol (acfg, "mono_aot_assembly_name", acfg->image->assembly->aname.name);
3721
3722 /* Emit the names */
3723 for (i = 0; i < acfg->globals->len; ++i) {
3724 char *name = g_ptr_array_index (acfg->globals, i);
3725
3726 sprintf (symbol, "name_%d", i);
3727 emit_section_change (acfg, ".text", 1);
3728 emit_label (acfg, symbol);
3729 emit_string (acfg, name);
3730 }
3731
3732 /* Emit the globals table */
3733 sprintf (symbol, "globals");
3734 emit_section_change (acfg, ".data", 0);
3735 /* This is not a global, since it is accessed by the init function */
3736 emit_alignment (acfg, 8);
3737 emit_label (acfg, symbol);
3738
3739 for (i = 0; i < acfg->globals->len; ++i) {
3740 char *name = g_ptr_array_index (acfg->globals, i);
3741
3742 sprintf (symbol, "name_%d", i);
3743 emit_pointer (acfg, symbol);
3744
3745 sprintf (symbol, "%s", name);
3746 emit_pointer (acfg, symbol);
3747 }
3748 /* Null terminate the table */
3749 emit_pointer (acfg, NULL);
3750 emit_pointer (acfg, NULL);
3751
3752 #if 0
3753 if (acfg->aot_opts.static_link) {
3754 char *p;
3755
3756 /*
3757 * Emit a global symbol which can be passed by an embedding app to
3758 * mono_aot_register_module ().
3759 */
3760 #if defined(__MACH__)
3761 sprintf (symbol, "_mono_aot_module_%s_info", acfg->image->assembly->aname.name);
3762 #else
3763 sprintf (symbol, "mono_aot_module_%s_info", acfg->image->assembly->aname.name);
3764 #endif
3765
3766 /* Get rid of characters which cannot occur in symbols */
3767 p = symbol;
3768 for (p = symbol; *p; ++p) {
3769 if (!(isalnum (*p) || *p == '_'))
3770 *p = '_';
3771 }
3772 acfg->static_linking_symbol = g_strdup (symbol);
3773 emit_global_inner (acfg, symbol, FALSE);
3774 emit_alignment (acfg, 8);
3775 emit_label (acfg, symbol);
3776 emit_pointer (acfg, "globals");
3777 } else {
3778 sprintf (symbol, "init_%s", acfg->image->assembly->aname.name);
3779 emit_section_change (acfg, ".text", 1);
3780 emit_alignment (acfg, 8);
3781 emit_label (acfg, symbol);
3782 if (acfg->use_bin_writer)
3783 g_assert_not_reached ();
3784 #ifdef __x86_64__
3785 fprintf (acfg->fp, "leaq globals(%%rip), %%rdi\n");
3786 fprintf (acfg->fp, "call mono_aot_register_globals@PLT\n");
3787 fprintf (acfg->fp, "ret\n");
3788 fprintf (acfg->fp, ".section .ctors,\"aw\",@progbits\n");
3789 emit_alignment (acfg, 8);
3790 emit_pointer (acfg, symbol);
3791 #elif defined(__arm__) && defined(__MACH__)
3792
3793 fprintf (acfg->fp, ".text\n");
3794 fprintf (acfg->fp, ".align 3\n");
3795
3796 fprintf (acfg->fp, "ldr r0, .L5\n");
3797 fprintf (acfg->fp, ".LPIC0:\n");
3798 fprintf (acfg->fp, "add r0, pc, r0\n");
3799 fprintf (acfg->fp, "ldr r0, [r0]\n");
3800 fprintf (acfg->fp, "b _mono_aot_register_globals@PLT\n");
3801 fprintf (acfg->fp, ".align 2\n");
3802
3803 fprintf (acfg->fp, ".L5:\n");
3804 fprintf (acfg->fp, ".long globals_ptr-(.LPIC0+8)\n");
3805
3806 fprintf (acfg->fp, ".data\n");
3807 fprintf (acfg->fp, ".align 2\n");
3808 fprintf (acfg->fp, "globals_ptr:\n");
3809 fprintf (acfg->fp, ".long globals\n");
3810
3811 fprintf (acfg->fp, ".mod_init_func\n");
3812 fprintf (acfg->fp, ".align 2\n");
3813 fprintf (acfg->fp, ".long %s@target1\n", symbol);
3814
3815 #elif defined(__arm__)
3816 /*
3817 * Taken from gcc generated code for:
3818 * static int i;
3819 * void foo () { bar (&i); }
3820 * gcc --shared -fPIC -O2
3821 */
3822 fprintf (acfg->fp, "ldr r3, .L5\n");
3823 fprintf (acfg->fp, "ldr r0, .L5+4\n");
3824 fprintf (acfg->fp, ".LPIC0:\n");
3825 fprintf (acfg->fp, "add r3, pc, r3\n");
3826 fprintf (acfg->fp, "add r0, r3, r0\n");
3827 fprintf (acfg->fp, "b mono_aot_register_globals(PLT)\n");
3828
3829 fprintf (acfg->fp, ".L5:\n");
3830 fprintf (acfg->fp, ".word _GLOBAL_OFFSET_TABLE_-(.LPIC0+8)\n");
3831 fprintf (acfg->fp, ".word globals(GOTOFF)\n");
3832
3833 fprintf (acfg->fp, ".section .init_array,\"aw\",%%init_array\n");
3834 fprintf (acfg->fp, ".align 2\n");
3835 fprintf (acfg->fp, ".word %s(target1)\n", symbol);
3836 #else
3837 g_assert_not_reached ();
3838 #endif
3839 }
3840 #endif
3841 }
3842 }
3843
3844 /*
3845 * Emit a structure containing all the information not stored elsewhere.
3846 */
3847 static void
3848 emit_file_info (MonoAotCompile *acfg)
3849 {
3850 char symbol [128];
3851
3852 sprintf (symbol, "mono_aot_file_info");
3853 emit_section_change (acfg, ".data", 0);
3854 emit_alignment (acfg, 8);
3855 emit_label (acfg, symbol);
3856 emit_global (acfg, symbol, FALSE);
3857
3858 /* The data emitted here must match MonoAotFileInfo in aot-runtime.c. */
3859 emit_int32 (acfg, acfg->plt_got_offset_base);
3860 emit_int32 (acfg, acfg->trampoline_got_offset_base);
3861 emit_int32 (acfg, acfg->num_aot_trampolines);
3862 emit_int32 (acfg, (int)(acfg->got_offset * sizeof (gpointer)));
3863 emit_int32 (acfg, acfg->plt_offset);
3864 emit_int32 (acfg, acfg->specific_trampoline_size);
3865 emit_pointer (acfg, "got");
3866 }
3867
3868 /*****************************************/
3869 /* Emitting DWARF debug information */
3870 /*****************************************/
3871
3872 static void
3873 emit_dwarf_info (MonoAotCompile *acfg)
3874 {
3875 #ifdef EMIT_DWARF_INFO
3876 int i;
3877 char symbol [128], symbol2 [128];
3878
3879 /* DIEs for methods */
3880 for (i = 0; i < acfg->nmethods; ++i) {
3881 MonoCompile *cfg = acfg->cfgs [i];
3882
3883 if (!cfg)
3884 continue;
3885
3886 sprintf (symbol, ".Lm_%x", i);
3887 sprintf (symbol2, ".Lme_%x", i);
3888
3889 mono_dwarf_writer_emit_method (acfg->dwarf, cfg, cfg->method, symbol, symbol2, NULL, 0, cfg->args, cfg->locals, cfg->unwind_ops, NULL);
3890 }
3891 #endif
3892 }
3893
3894 static int
3895 compile_asm (MonoAotCompile *acfg)
3896 {
3897 char *command, *objfile;
3898 char *outfile_name, *tmp_outfile_name;
3899
3900 #if defined(__x86_64__)
3901 #define AS_OPTIONS "--64"
3902 #elif defined(sparc) && SIZEOF_VOID_P == 8
3903 #define AS_OPTIONS "-xarch=v9"
3904 #else
3905 #define AS_OPTIONS ""
3906 #endif
3907
3908 if (acfg->aot_opts.asm_only) {
3909 printf ("Output file: '%s'.\n", acfg->tmpfname);
3910 if (acfg->aot_opts.static_link)
3911 printf ("Linking symbol: '%s'.\n", acfg->static_linking_symbol);
3912 return 0;
3913 }
3914
3915 if (acfg->aot_opts.static_link) {
3916 if (acfg->aot_opts.outfile)
3917 objfile = g_strdup_printf ("%s", acfg->aot_opts.outfile);
3918 else
3919 objfile = g_strdup_printf ("%s.o", acfg->image->name);
3920 } else {
3921 objfile = g_strdup_printf ("%s.o", acfg->tmpfname);
3922 }
3923 command = g_strdup_printf ("as %s %s -o %s", AS_OPTIONS, acfg->tmpfname, objfile);
3924 printf ("Executing the native assembler: %s\n", command);
3925 if (system (command) != 0) {
3926 g_free (command);
3927 g_free (objfile);
3928 return 1;
3929 }
3930
3931 g_free (command);
3932
3933 if (acfg->aot_opts.static_link) {
3934 printf ("Output file: '%s'.\n", objfile);
3935 printf ("Linking symbol: '%s'.\n", acfg->static_linking_symbol);
3936 g_free (objfile);
3937 return 0;
3938 }
3939
3940 if (acfg->aot_opts.outfile)
3941 outfile_name = g_strdup_printf ("%s", acfg->aot_opts.outfile);
3942 else
3943 outfile_name = g_strdup_printf ("%s%s", acfg->image->name, SHARED_EXT);
3944
3945 tmp_outfile_name = g_strdup_printf ("%s.tmp", outfile_name);
3946
3947 #if defined(sparc)
3948 command = g_strdup_printf ("ld -shared -G -o %s %s.o", outfile_name, acfg->tmpfname);
3949 #elif defined(__ppc__) && defined(__MACH__)
3950 command = g_strdup_printf ("gcc -dynamiclib -o %s %s.o", outfile_name, acfg->tmpfname);
3951 #elif defined(PLATFORM_WIN32)
3952 command = g_strdup_printf ("gcc -shared --dll -mno-cygwin -o %s %s.o", outfile_name, acfg->tmpfname);
3953 #else
3954 if (acfg->aot_opts.no_dlsym) {
3955 /*
3956 * Need to link using gcc so our ctor function gets called.
3957 */
3958 command = g_strdup_printf ("gcc -shared -o %s %s.o", outfile_name, acfg->tmpfname);
3959 } else {
3960 command = g_strdup_printf ("ld -shared -o %s %s.o", outfile_name, acfg->tmpfname);
3961 }
3962 #endif
3963 printf ("Executing the native linker: %s\n", command);
3964 if (system (command) != 0) {
3965 g_free (tmp_outfile_name);
3966 g_free (outfile_name);
3967 g_free (command);
3968 g_free (objfile);
3969 return 1;
3970 }
3971
3972 g_free (command);
3973 unlink (objfile);
3974 /*com = g_strdup_printf ("strip --strip-unneeded %s%s", acfg->image->name, SHARED_EXT);
3975 printf ("Stripping the binary: %s\n", com);
3976 system (com);
3977 g_free (com);*/
3978
3979 rename (tmp_outfile_name, outfile_name);
3980
3981 g_free (tmp_outfile_name);
3982 g_free (outfile_name);
3983 g_free (objfile);
3984
3985 if (acfg->aot_opts.save_temps)
3986 printf ("Retained input file.\n");
3987 else
3988 unlink (acfg->tmpfname);
3989
3990 return 0;
3991 }
3992
3993 static void
3994 acfg_free (MonoAotCompile *acfg)
3995 {
3996 int i;
3997
3998 img_writer_destroy (acfg->w);
3999 for (i = 0; i < acfg->nmethods; ++i)
4000 if (acfg->cfgs [i])
4001 g_free (acfg->cfgs [i]);
4002 g_free (acfg->cfgs);
4003 g_free (acfg->static_linking_symbol);
4004 g_ptr_array_free (acfg->methods, TRUE);
4005 g_ptr_array_free (acfg->shared_patches, TRUE);
4006 g_ptr_array_free (acfg->image_table, TRUE);
4007 g_ptr_array_free (acfg->globals, TRUE);
4008 g_hash_table_destroy (acfg->method_indexes);
4009 g_hash_table_destroy (acfg->plt_offset_to_patch);
4010 g_hash_table_destroy (acfg->patch_to_plt_offset);
4011 g_hash_table_destroy (acfg->patch_to_shared_got_offset);
4012 g_hash_table_destroy (acfg->method_to_cfg);
4013 g_hash_table_destroy (acfg->token_info_hash);
4014 g_hash_table_destroy (acfg->image_hash);
4015 mono_mempool_destroy (acfg->mempool);
4016 g_free (acfg);
4017 }
4018
4019 int
4020 mono_compile_assembly (MonoAssembly *ass, guint32 opts, const char *aot_options)
4021 {
4022 MonoImage *image = ass->image;
4023 char symbol [256];
4024 int i, res, methods_len;
4025 MonoAotCompile *acfg;
4026 char *outfile_name, *tmp_outfile_name;
4027 TV_DECLARE (atv);
4028 TV_DECLARE (btv);
4029
4030 printf ("Mono Ahead of Time compiler - compiling assembly %s\n", image->name);
4031
4032 acfg = g_new0 (MonoAotCompile, 1);
4033 acfg->methods = g_ptr_array_new ();
4034 acfg->method_indexes = g_hash_table_new (NULL, NULL);
4035 acfg->plt_offset_to_patch = g_hash_table_new (NULL, NULL);
4036 acfg->patch_to_plt_offset = g_hash_table_new (mono_patch_info_hash, mono_patch_info_equal);
4037 acfg->patch_to_shared_got_offset = g_hash_table_new (mono_patch_info_hash, mono_patch_info_equal);
4038 acfg->shared_patches = g_ptr_array_new ();
4039 acfg->method_to_cfg = g_hash_table_new (NULL, NULL);
4040 acfg->token_info_hash = g_hash_table_new_full (NULL, NULL, NULL, g_free);
4041 acfg->image_hash = g_hash_table_new (NULL, NULL);
4042 acfg->image_table = g_ptr_array_new ();
4043 acfg->globals = g_ptr_array_new ();
4044 acfg->image = image;
4045 acfg->opts = opts;
4046 acfg->mempool = mono_mempool_new ();
4047 acfg->extra_methods = g_ptr_array_new ();
4048 InitializeCriticalSection (&acfg->mutex);
4049
4050 memset (&acfg->aot_opts, 0, sizeof (acfg->aot_opts));
4051 acfg->aot_opts.write_symbols = TRUE;
4052
4053 mono_aot_parse_options (aot_options, &acfg->aot_opts);
4054
4055 //acfg->aot_opts.print_skipped_methods = TRUE;
4056
4057 #ifdef __arm__
4058 if (acfg->aot_opts.full_aot)
4059 /* arch_emit_unbox_trampoline () etc only works with the asm writer */
4060 acfg->aot_opts.asm_writer = TRUE;
4061 #endif
4062
4063 #ifndef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES
4064 if (acfg->aot_opts.full_aot) {
4065 printf ("--aot=full is not supported on this platform.\n");
4066 return 1;
4067 }
4068 #endif
4069
4070 if (!acfg->aot_opts.asm_only && !acfg->aot_opts.asm_writer && bin_writer_supported ()) {
4071 if (acfg->aot_opts.outfile)
4072 outfile_name = g_strdup_printf ("%s", acfg->aot_opts.outfile);
4073 else
4074 outfile_name = g_strdup_printf ("%s%s", acfg->image->name, SHARED_EXT);
4075
4076 tmp_outfile_name = g_strdup_printf ("%s.tmp", outfile_name);
4077
4078 acfg->fp = fopen (tmp_outfile_name, "w");
4079 g_assert (acfg->fp);
4080
4081 acfg->w = img_writer_create (acfg->fp, TRUE);
4082 acfg->use_bin_writer = TRUE;
4083 } else {
4084 if (acfg->aot_opts.asm_only) {
4085 if (acfg->aot_opts.outfile)
4086 acfg->tmpfname = g_strdup_printf ("%s", acfg->aot_opts.outfile);
4087 else
4088 acfg->tmpfname = g_strdup_printf ("%s.s", acfg->image->name);
4089 acfg->fp = fopen (acfg->tmpfname, "w+");
4090 } else {
4091 int i = g_file_open_tmp ("mono_aot_XXXXXX", &acfg->tmpfname, NULL);
4092 acfg->fp = fdopen (i, "w+");
4093 }
4094 g_assert (acfg->fp);
4095
4096 acfg->w = img_writer_create (acfg->fp, FALSE);
4097
4098 /* hush compiler warnings about these being possibly uninitialized */
4099 tmp_outfile_name = NULL;
4100 outfile_name = NULL;
4101 }
4102
4103 load_profile_files (acfg);
4104
4105 img_writer_emit_start (acfg->w);
4106
4107 acfg->dwarf = mono_dwarf_writer_create (acfg->w, NULL);
4108
4109 acfg->num_aot_trampolines = acfg->aot_opts.full_aot ? 10240 : 0;
4110
4111 acfg->method_index = 1;
4112
4113 /* Collect methods */
4114 for (i = 0; i < image->tables [MONO_TABLE_METHOD].rows; ++i) {
4115 MonoMethod *method;
4116 guint32 token = MONO_TOKEN_METHOD_DEF | (i + 1);
4117
4118 method = mono_get_method (acfg->image, token, NULL);
4119
4120 if (!method) {
4121 printf ("Failed to load method 0x%x from '%s'.\n", token, image->name);
4122 exit (1);
4123 }
4124
4125 /* Load all methods eagerly to skip the slower lazy loading code */
4126 mono_class_setup_methods (method->klass);
4127
4128 if (acfg->aot_opts.full_aot && method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
4129 /* Compile the wrapper instead */
4130 /* We do this here instead of add_wrappers () because it is easy to do it here */
4131 MonoMethod *wrapper = mono_marshal_get_native_wrapper (method, check_for_pending_exc, TRUE);
4132 method = wrapper;
4133 }
4134
4135 /* Since we add the normal methods first, their index will be equal to their zero based token index */
4136 add_method_with_index (acfg, method, i);
4137 acfg->method_index ++;
4138 }
4139
4140 add_generic_instances (acfg);
4141
4142 if (acfg->aot_opts.full_aot)
4143 add_wrappers (acfg);
4144
4145 acfg->cfgs_size = acfg->methods->len + 32;
4146 acfg->cfgs = g_new0 (MonoCompile*, acfg->cfgs_size);
4147
4148 /* PLT offset 0 is reserved for the PLT trampoline */
4149 acfg->plt_offset = 1;
4150
4151 /* Compile methods */
4152 TV_GETTIME (atv);
4153
4154 if (acfg->aot_opts.nthreads > 0) {
4155 GPtrArray *frag;
4156 int len, j;
4157 GPtrArray *threads;
4158 HANDLE handle;
4159 gpointer *user_data;
4160 MonoMethod **methods;
4161
4162 methods_len = acfg->methods->len;
4163
4164 len = acfg->methods->len / acfg->aot_opts.nthreads;
4165 g_assert (len > 0);
4166 /*
4167 * Partition the list of methods into fragments, and hand it to threads to
4168 * process.
4169 */
4170 threads = g_ptr_array_new ();
4171 /* Make a copy since acfg->methods is modified by compile_method () */
4172 methods = g_new0 (MonoMethod*, methods_len);
4173 //memcpy (methods, g_ptr_array_index (acfg->methods, 0), sizeof (MonoMethod*) * methods_len);
4174 for (i = 0; i < methods_len; ++i)
4175 methods [i] = g_ptr_array_index (acfg->methods, i);
4176 i = 0;
4177 while (i < methods_len) {
4178 frag = g_ptr_array_new ();
4179 for (j = 0; j < len; ++j) {
4180 if (i < methods_len) {
4181 g_ptr_array_add (frag, methods [i]);
4182 i ++;
4183 }
4184 }
4185
4186 user_data = g_new0 (gpointer, 3);
4187 user_data [0] = mono_domain_get ();
4188 user_data [1] = acfg;
4189 user_data [2] = frag;
4190
4191 handle = CreateThread (NULL, 0, (gpointer)compile_thread_main, user_data, 0, NULL);
4192 g_ptr_array_add (threads, handle);
4193 }
4194 g_free (methods);
4195
4196 for (i = 0; i < threads->len; ++i) {
4197 WaitForSingleObjectEx (g_ptr_array_index (threads, i), INFINITE, FALSE);
4198 }
4199 } else {
4200 methods_len = 0;
4201 }
4202
4203 /* Compile methods added by compile_method () or all methods if nthreads == 0 */
4204 for (i = methods_len; i < acfg->methods->len; ++i) {
4205 /* This can new methods to acfg->methods */
4206 compile_method (acfg, g_ptr_array_index (acfg->methods, i));
4207 }
4208
4209 TV_GETTIME (btv);
4210
4211 acfg->stats.jit_time = TV_ELAPSED (atv, btv);
4212
4213 TV_GETTIME (atv);
4214
4215 mono_dwarf_writer_emit_base_info (acfg->dwarf, arch_get_cie_program ());
4216
4217 alloc_got_slots (acfg);
4218
4219 emit_code (acfg);
4220
4221 emit_info (acfg);
4222
4223 emit_extra_methods (acfg);
4224
4225 emit_method_order (acfg);
4226
4227 emit_trampolines (acfg);
4228
4229 emit_class_name_table (acfg);
4230
4231 emit_got_info (acfg);
4232
4233 emit_exception_info (acfg);
4234
4235 emit_class_info (acfg);
4236
4237 emit_plt (acfg);
4238
4239 emit_image_table (acfg);
4240
4241 emit_got (acfg);
4242
4243 emit_file_info (acfg);
4244
4245 emit_globals (acfg);
4246
4247 emit_dwarf_info (acfg);
4248
4249 sprintf (symbol, "mem_end");
4250 emit_section_change (acfg, ".text", 1);
4251 emit_global (acfg, symbol, FALSE);
4252 emit_alignment (acfg, 8);
4253 emit_label (acfg, symbol);
4254
4255 TV_GETTIME (btv);
4256
4257 acfg->stats.gen_time = TV_ELAPSED (atv, btv);
4258
4259 printf ("Code: %d Info: %d Ex Info: %d Class Info: %d PLT: %d GOT Info: %d GOT Info Offsets: %d GOT: %d\n", acfg->stats.code_size, acfg->stats.info_size, acfg->stats.ex_info_size, acfg->stats.class_info_size, acfg->plt_offset, acfg->stats.got_info_size, acfg->stats.got_info_offsets_size, (int)(acfg->got_offset * sizeof (gpointer)));
4260
4261 TV_GETTIME (atv);
4262 res = img_writer_emit_writeout (acfg->w);
4263 if (res != 0) {
4264 acfg_free (acfg);
4265 return res;
4266 }
4267 if (acfg->use_bin_writer) {
4268 rename (tmp_outfile_name, outfile_name);
4269 } else {
4270 res = compile_asm (acfg);
4271 if (res != 0) {
4272 acfg_free (acfg);
4273 return res;
4274 }
4275 }
4276 TV_GETTIME (btv);
4277 acfg->stats.link_time = TV_ELAPSED (atv, btv);
4278
4279 printf ("Compiled %d out of %d methods (%d%%)\n", acfg->stats.ccount, acfg->stats.mcount, acfg->stats.mcount ? (acfg->stats.ccount * 100) / acfg->stats.mcount : 100);
4280 if (acfg->stats.genericcount)
4281 printf ("%d methods are generic (%d%%)\n", acfg->stats.genericcount, acfg->stats.mcount ? (acfg->stats.genericcount * 100) / acfg->stats.mcount : 100);
4282 if (acfg->stats.abscount)
4283 printf ("%d methods contain absolute addresses (%d%%)\n", acfg->stats.abscount, acfg->stats.mcount ? (acfg->stats.abscount * 100) / acfg->stats.mcount : 100);
4284 if (acfg->stats.lmfcount)
4285 printf ("%d methods contain lmf pointers (%d%%)\n", acfg->stats.lmfcount, acfg->stats.mcount ? (acfg->stats.lmfcount * 100) / acfg->stats.mcount : 100);
4286 if (acfg->stats.ocount)
4287 printf ("%d methods have other problems (%d%%)\n", acfg->stats.ocount, acfg->stats.mcount ? (acfg->stats.ocount * 100) / acfg->stats.mcount : 100);
4288 printf ("Methods without GOT slots: %d (%d%%)\n", acfg->stats.methods_without_got_slots, acfg->stats.mcount ? (acfg->stats.methods_without_got_slots * 100) / acfg->stats.mcount : 100);
4289 printf ("Direct calls: %d (%d%%)\n", acfg->stats.direct_calls, acfg->stats.all_calls ? (acfg->stats.direct_calls * 100) / acfg->stats.all_calls : 100);
4290
4291 /*
4292 printf ("GOT slot distribution:\n");
4293 for (i = 0; i < MONO_PATCH_INFO_NONE; ++i)
4294 if (acfg->stats.got_slot_types [i])
4295 printf ("\t%s: %d\n", get_patch_name (i), acfg->stats.got_slot_types [i]);
4296 */
4297
4298 printf ("JIT time: %d ms, Generation time: %d ms, Assembly+Link time: %d ms.\n", acfg->stats.jit_time / 1000, acfg->stats.gen_time / 1000, acfg->stats.link_time / 1000);
4299
4300 acfg_free (acfg);
4301
4302 return 0;
4303 }
4304
4305 /*
4306 * Support for emitting debug info for JITted code.
4307 *
4308 * This works as follows:
4309 * - the runtime writes out an xdb.s file containing DWARF debug info.
4310 * - the user calls a gdb macro
4311 * - the macro compiles and loads this shared library using add-symbol-file.
4312 *
4313 * This is based on the xdebug functionality in the Kaffe Java VM.
4314 *
4315 * We emit assembly code instead of using the ELF writer, so we can emit debug info
4316 * incrementally as each method is JITted, and the debugger doesn't have to call
4317 * into the runtime to emit the shared library, which would cause all kinds of
4318 * complications, like threading issues, and the fact that the ELF writer's
4319 * emit_writeout () function cannot be called more than once.
4320 */
4321
4322 /* The recommended gdb macro is: */
4323 /*
4324 define xdb
4325 shell rm -f xdb.so && as --64 -o xdb.o xdb.s && ld -shared -o xdb.so xdb.o
4326 add-symbol-file xdb.so 0
4327 end
4328 */
4329
4330 static MonoDwarfWriter *xdebug_writer;
4331 static CRITICAL_SECTION xdebug_mutex;
4332 static FILE *xdebug_fp;
4333
4334 #define mono_xdebug_lock(acfg) EnterCriticalSection (&xdebug_mutex)
4335 #define mono_xdebug_unlock(acfg) LeaveCriticalSection (&xdebug_mutex)
4336
4337 void
4338 mono_xdebug_init (void)
4339 {
4340 FILE *il_file;
4341 MonoImageWriter *w;
4342
4343 InitializeCriticalSection (&xdebug_mutex);
4344
4345 unlink ("xdb.s");
4346 xdebug_fp = fopen ("xdb.s", "w");
4347
4348 w = img_writer_create (xdebug_fp, FALSE);
4349
4350 img_writer_emit_start (w);
4351
4352 /* This file will contain the IL code for methods which don't have debug info */
4353 il_file = fopen ("xdb.il", "w");
4354
4355 xdebug_writer = mono_dwarf_writer_create (w, il_file);
4356
4357 /* Emit something so the file has a text segment */
4358 img_writer_emit_section_change (w, ".text", 0);
4359 img_writer_emit_string (w, "");
4360
4361 mono_dwarf_writer_emit_base_info (xdebug_writer, arch_get_cie_program ());
4362 }
4363
4364 /*
4365 * mono_save_xdebug_info:
4366 *
4367 * Emit debugging info for METHOD into an assembly file which can be assembled
4368 * and loaded into gdb to provide debugging info for JITted code.
4369 */
4370 void
4371 mono_save_xdebug_info (MonoCompile *cfg)
4372 {
4373 if (!xdebug_writer)
4374 return;
4375
4376 mono_xdebug_lock ();
4377 mono_dwarf_writer_emit_method (xdebug_writer, cfg, cfg->jit_info->method, NULL, NULL, cfg->jit_info->code_start, cfg->jit_info->code_size, cfg->args, cfg->locals, cfg->unwind_ops, mono_debug_find_method (cfg->jit_info->method, mono_domain_get ()));
4378 fflush (xdebug_fp);
4379 mono_xdebug_unlock ();
4380 }
4381
4382 /*
4383 * mono_save_trampoline_xdebug_info:
4384 *
4385 * Same as mono_save_xdebug_info, but for trampolines.
4386 */
4387 void
4388 mono_save_trampoline_xdebug_info (const char *tramp_name, guint8 *code, guint32 code_size, GSList *unwind_info)
4389 {
4390 if (!xdebug_writer)
4391 return;
4392
4393 mono_xdebug_lock ();
4394 mono_dwarf_writer_emit_trampoline (xdebug_writer, tramp_name, NULL, NULL, code, code_size, unwind_info);
4395 fflush (xdebug_fp);
4396 mono_xdebug_unlock ();
4397 }
4398
4399 #else
4400
4401 /* AOT disabled */
4402
4403 int
4404 mono_compile_assembly (MonoAssembly *ass, guint32 opts, const char *aot_options)
4405 {
4406 return 0;
4407 }
4408
4409 void
4410 mono_xdebug_init (void)
4411 {
4412 }
4413
4414 void
4415 mono_save_xdebug_info (MonoCompile *cfg)
4416 {
4417 }
4418
4419 void
4420 mono_save_trampoline_xdebug_info (const char *tramp_name, guint8 *code, guint32 code_size, GSList *unwind_info)
4421 {
4422 }
4423
4424 #endif
Mono Debugger - Cloned from the original SVN repository at mono-cvs.ximian.com