mono/mini/debug-mini.c

   1 /*
   2  * debug-mini.c: Mini-specific debugging stuff.
   3  *
   4  * Author:
   5  *   Martin Baulig (martin@ximian.com)
   6  *
   7  * (C) 2003 Ximian, Inc.
   8  */
   9
  10 #include "mini.h"
  11 #include "jit.h"
  12 #include "config.h"
  13 #include <mono/metadata/verify.h>
  14 #include <mono/metadata/mono-config.h>
  15 #include <mono/metadata/mono-debug.h>
  16 #include <mono/metadata/appdomain.h>
  17 #include <mono/metadata/threads-types.h>
  18
  19 #define _IN_THE_MONO_DEBUGGER
  20 #include <mono/metadata/mono-debug-debugger.h>
  21 #include "debug-mini.h"
  22
  23 #include <mono/utils/valgrind.h>
  24
  25 #ifdef MONO_DEBUGGER_SUPPORTED
  26 #include <libgc/include/libgc-mono-debugger.h>
  27 #endif
  28
  29 typedef struct {
  30         guint32 index;
  31         MonoMethodDesc *desc;
  32 } MiniDebugBreakpointInfo;
  33
  34 typedef struct
  35 {
  36         MonoDebugMethodJitInfo *jit;
  37         GArray *line_numbers;
  38         guint32 has_line_numbers;
  39         guint32 breakpoint_id;
  40 } MiniDebugMethodInfo;
  41
  42 typedef struct {
  43         MonoObject *last_exception;
  44         guint32 stopped_on_exception : 1;
  45         guint32 stopped_on_unhandled : 1;
  46 } MonoDebuggerExceptionState;
  47
  48 typedef enum {
  49         MONO_DEBUGGER_THREAD_FLAGS_NONE         = 0,
  50         MONO_DEBUGGER_THREAD_FLAGS_INTERNAL     = 1,
  51         MONO_DEBUGGER_THREAD_FLAGS_THREADPOOL   = 2
  52 } MonoDebuggerThreadFlags;
  53
  54 typedef enum {
  55         MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_NONE                = 0,
  56         MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_IN_RUNTIME_INVOKE   = 1,
  57         MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED     = 2
  58 } MonoDebuggerInternalThreadFlags;
  59
  60 struct _MonoDebuggerThreadInfo {
  61         guint64 tid;
  62         guint64 lmf_addr;
  63         guint64 end_stack;
  64
  65         guint64 extended_notifications;
  66
  67         /* Next pointer. */
  68         MonoDebuggerThreadInfo *next;
  69
  70         /*
  71          * The stack bounds are only used when reading a core file.
  72          */
  73         guint64 stack_start;
  74         guint64 signal_stack_start;
  75         guint32 stack_size;
  76         guint32 signal_stack_size;
  77
  78         guint32 thread_flags;
  79
  80         /*
  81          * The debugger doesn't access anything beyond this point.
  82          */
  83         MonoDebuggerExceptionState exception_state;
  84
  85         guint32 internal_flags;
  86
  87         MonoJitTlsData *jit_tls;
  88         MonoInternalThread *thread;
  89 };
  90
  91 typedef struct {
  92         gpointer stack_pointer;
  93         MonoObject *exception_obj;
  94         guint32 stop;
  95         guint32 stop_unhandled;
  96 } MonoDebuggerExceptionInfo;
  97
  98 MonoDebuggerThreadInfo *mono_debugger_thread_table = NULL;
  99
 100 static inline void
 101 record_line_number (MiniDebugMethodInfo *info, guint32 address, guint32 offset)
 102 {
 103         MonoDebugLineNumberEntry lne;
 104
 105         lne.native_offset = address;
 106         lne.il_offset = offset;
 107
 108         g_array_append_val (info->line_numbers, lne);
 109 }
 110
 111
 112 void
 113 mono_debug_init_method (MonoCompile *cfg, MonoBasicBlock *start_block, guint32 breakpoint_id)
 114 {
 115         MiniDebugMethodInfo *info;
 116
 117         if (mono_debug_format == MONO_DEBUG_FORMAT_NONE)
 118                 return;
 119
 120         info = g_new0 (MiniDebugMethodInfo, 1);
 121         info->breakpoint_id = breakpoint_id;
 122
 123         cfg->debug_info = info;
 124 }
 125
 126 void
 127 mono_debug_open_method (MonoCompile *cfg)
 128 {
 129         MiniDebugMethodInfo *info;
 130         MonoDebugMethodJitInfo *jit;
 131         MonoMethodHeader *header;
 132
 133         info = (MiniDebugMethodInfo *) cfg->debug_info;
 134         if (!info)
 135                 return;
 136
 137         mono_class_init (cfg->method->klass);
 138
 139         header = cfg->header;
 140         g_assert (header);
 141
 142         info->jit = jit = g_new0 (MonoDebugMethodJitInfo, 1);
 143         info->line_numbers = g_array_new (FALSE, TRUE, sizeof (MonoDebugLineNumberEntry));
 144         jit->num_locals = header->num_locals;
 145         jit->locals = g_new0 (MonoDebugVarInfo, jit->num_locals);
 146 }
 147
 148 static void
 149 write_variable (MonoInst *inst, MonoDebugVarInfo *var)
 150 {
 151         var->type = inst->inst_vtype;
 152
 153         if (inst->opcode == OP_REGVAR)
 154                 var->index = inst->dreg | MONO_DEBUG_VAR_ADDRESS_MODE_REGISTER;
 155         else if (inst->flags & MONO_INST_IS_DEAD)
 156                 var->index = MONO_DEBUG_VAR_ADDRESS_MODE_DEAD;
 157         else {
 158                 /* the debug interface needs fixing to allow 0(%base) address */
 159                 var->index = inst->inst_basereg | MONO_DEBUG_VAR_ADDRESS_MODE_REGOFFSET;
 160                 var->offset = inst->inst_offset;
 161         }
 162 }
 163
 164 /*
 165  * mono_debug_add_vg_method:
 166  *
 167  *  Register symbol information for the method with valgrind
 168  */
 169 static void
 170 mono_debug_add_vg_method (MonoMethod *method, MonoDebugMethodJitInfo *jit)
 171 {
 172 #ifdef VALGRIND_ADD_LINE_INFO
 173         MonoMethodHeader *header;
 174         MonoDebugMethodInfo *minfo;
 175         int i;
 176         char *filename = NULL;
 177         guint32 address, line_number;
 178         const char *full_name;
 179         guint32 *addresses;
 180         guint32 *lines;
 181
 182         if (!RUNNING_ON_VALGRIND)
 183                 return;
 184
 185         header = mono_method_get_header (method);
 186
 187         full_name = mono_method_full_name (method, TRUE);
 188
 189         addresses = g_new0 (guint32, header->code_size + 1);
 190         lines = g_new0 (guint32, header->code_size + 1);
 191
 192         /*
 193          * Very simple code to convert the addr->offset mappings that mono has
 194          * into [addr-addr] ->line number mappings.
 195          */
 196
 197         minfo = mono_debug_lookup_method (method);
 198         if (minfo) {
 199                 /* Create offset->line number mapping */
 200                 for (i = 0; i < header->code_size; ++i) {
 201                         MonoDebugSourceLocation *location;
 202
 203                         location = mono_debug_symfile_lookup_location (minfo, i);
 204                         if (!location)
 205                                 continue;
 206
 207                         lines [i] = location.row;
 208                         if (!filename)
 209                                 filename = location.source_file;
 210
 211                         mono_debug_free_source_location (location);
 212                 }
 213         }
 214
 215         /* Create address->offset mapping */
 216         for (i = 0; i < jit->num_line_numbers; ++i) {
 217                 MonoDebugLineNumberEntry *lne = jit->line_numbers [i];
 218
 219                 g_assert (lne->offset <= header->code_size);
 220
 221                 if ((addresses [lne->offset] == 0) || (lne->address < addresses [lne->offset]))
 222                         addresses [lne->offset] = lne->address;
 223         }
 224         /* Fill out missing addresses */
 225         address = 0;
 226         for (i = 0; i < header->code_size; ++i) {
 227                 if (addresses [i] == 0)
 228                         addresses [i] = address;
 229                 else
 230                         address = addresses [i];
 231         }
 232
 233         address = 0;
 234         line_number = 0;
 235         i = 0;
 236         while (i < header->code_size) {
 237                 if (lines [i] == line_number)
 238                         i ++;
 239                 else {
 240                         if (line_number > 0) {
 241                                 //g_assert (addresses [i] - 1 >= address);
 242
 243                                 if (addresses [i] - 1 >= address) {
 244                                         VALGRIND_ADD_LINE_INFO (jit->code_start + address, jit->code_start + addresses [i] - 1, filename, line_number);
 245                                         //printf ("[%d-%d] -> %d.\n", address, addresses [i] - 1, line_number);
 246                                 }
 247                         }
 248                         address = addresses [i];
 249                         line_number = lines [i];
 250                 }
 251         }
 252
 253         if (line_number > 0) {
 254                 VALGRIND_ADD_LINE_INFO (jit->code_start + address, jit->code_start + jit->code_size - 1, filename, line_number);
 255                 //printf ("[%d-%d] -> %d.\n", address, jit->code_size - 1, line_number);
 256         }
 257
 258         VALGRIND_ADD_SYMBOL (jit->code_start, jit->code_size, full_name);
 259
 260         g_free (addresses);
 261         g_free (lines);
 262         mono_metadata_free_mh (header);
 263 #endif /* VALGRIND_ADD_LINE_INFO */
 264 }
 265
 266 void
 267 mono_debug_close_method (MonoCompile *cfg)
 268 {
 269         MiniDebugMethodInfo *info;
 270         MonoDebugMethodJitInfo *jit;
 271         MonoMethodHeader *header;
 272         MonoMethodSignature *sig;
 273         MonoDebugMethodAddress *debug_info;
 274         MonoMethod *method;
 275         int i;
 276
 277         info = (MiniDebugMethodInfo *) cfg->debug_info;
 278         if (!info || !info->jit) {
 279                 if (info)
 280                         g_free (info);
 281                 return;
 282         }
 283
 284         method = cfg->method;
 285         header = cfg->header;
 286         sig = mono_method_signature (method);
 287
 288         jit = info->jit;
 289         jit->code_start = cfg->native_code;
 290         jit->epilogue_begin = cfg->epilog_begin;
 291         jit->code_size = cfg->code_len;
 292
 293         if (jit->epilogue_begin)
 294                    record_line_number (info, jit->epilogue_begin, header->code_size);
 295
 296         jit->num_params = sig->param_count;
 297         jit->params = g_new0 (MonoDebugVarInfo, jit->num_params);
 298
 299         for (i = 0; i < jit->num_locals; i++)
 300                 write_variable (cfg->locals [i], &jit->locals [i]);
 301
 302         if (sig->hasthis) {
 303                 jit->this_var = g_new0 (MonoDebugVarInfo, 1);
 304                 write_variable (cfg->args [0], jit->this_var);
 305         }
 306
 307         for (i = 0; i < jit->num_params; i++)
 308                 write_variable (cfg->args [i + sig->hasthis], &jit->params [i]);
 309
 310         jit->num_line_numbers = info->line_numbers->len;
 311         jit->line_numbers = g_new0 (MonoDebugLineNumberEntry, jit->num_line_numbers);
 312
 313         for (i = 0; i < jit->num_line_numbers; i++)
 314                 jit->line_numbers [i] = g_array_index (info->line_numbers, MonoDebugLineNumberEntry, i);
 315
 316         debug_info = mono_debug_add_method (cfg->method_to_register, jit, cfg->domain);
 317
 318         mono_debug_add_vg_method (method, jit);
 319
 320         mono_debugger_check_breakpoints (method, debug_info);
 321
 322         mono_debug_free_method_jit_info (jit);
 323         mono_debug_free_method (cfg);
 324 }
 325
 326 void
 327 mono_debug_free_method (MonoCompile *cfg)
 328 {
 329         MiniDebugMethodInfo *info;
 330
 331         info = (MiniDebugMethodInfo *) cfg->debug_info;
 332         if (info) {
 333                 if (info->line_numbers)
 334                         g_array_free (info->line_numbers, TRUE);
 335                 g_free (info);
 336                 cfg->debug_info = NULL;
 337         }
 338 }
 339
 340 void
 341 mono_debug_record_line_number (MonoCompile *cfg, MonoInst *ins, guint32 address)
 342 {
 343         MiniDebugMethodInfo *info;
 344         MonoMethodHeader *header;
 345         guint32 offset;
 346
 347         info = (MiniDebugMethodInfo *) cfg->debug_info;
 348         if (!info || !info->jit || !ins->cil_code)
 349                 return;
 350
 351         header = cfg->header;
 352         g_assert (header);
 353
 354         if ((ins->cil_code < header->code) ||
 355             (ins->cil_code > header->code + header->code_size))
 356                 return;
 357
 358         offset = ins->cil_code - header->code;
 359         if (!info->has_line_numbers) {
 360                 info->jit->prologue_end = address;
 361                 info->has_line_numbers = TRUE;
 362         }
 363
 364         record_line_number (info, address, offset);
 365 }
 366
 367 void
 368 mono_debug_open_block (MonoCompile *cfg, MonoBasicBlock *bb, guint32 address)
 369 {
 370         MiniDebugMethodInfo *info;
 371         MonoMethodHeader *header;
 372         guint32 offset;
 373
 374         info = (MiniDebugMethodInfo *) cfg->debug_info;
 375         if (!info || !info->jit || !bb->cil_code)
 376                 return;
 377
 378         header = cfg->header;
 379         g_assert (header);
 380
 381         if ((bb->cil_code < header->code) ||
 382             (bb->cil_code > header->code + header->code_size))
 383                 return;
 384
 385         offset = bb->cil_code - header->code;
 386         if (!info->has_line_numbers) {
 387                 info->jit->prologue_end = address;
 388                 info->has_line_numbers = TRUE;
 389         }
 390
 391         record_line_number (info, address, offset);
 392 }
 393
 394 static inline void
 395 encode_value (gint32 value, guint8 *buf, guint8 **endbuf)
 396 {
 397         guint8 *p = buf;
 398
 399         //printf ("ENCODE: %d 0x%x.\n", value, value);
 400
 401         /*
 402          * Same encoding as the one used in the metadata, extended to handle values
 403          * greater than 0x1fffffff.
 404          */
 405         if ((value >= 0) && (value <= 127))
 406                 *p++ = value;
 407         else if ((value >= 0) && (value <= 16383)) {
 408                 p [0] = 0x80 | (value >> 8);
 409                 p [1] = value & 0xff;
 410                 p += 2;
 411         } else if ((value >= 0) && (value <= 0x1fffffff)) {
 412                 p [0] = (value >> 24) | 0xc0;
 413                 p [1] = (value >> 16) & 0xff;
 414                 p [2] = (value >> 8) & 0xff;
 415                 p [3] = value & 0xff;
 416                 p += 4;
 417         }
 418         else {
 419                 p [0] = 0xff;
 420                 p [1] = (value >> 24) & 0xff;
 421                 p [2] = (value >> 16) & 0xff;
 422                 p [3] = (value >> 8) & 0xff;
 423                 p [4] = value & 0xff;
 424                 p += 5;
 425         }
 426         if (endbuf)
 427                 *endbuf = p;
 428 }
 429
 430 static inline gint32
 431 decode_value (guint8 *ptr, guint8 **rptr)
 432 {
 433         guint8 b = *ptr;
 434         gint32 len;
 435
 436         if ((b & 0x80) == 0){
 437                 len = b;
 438                 ++ptr;
 439         } else if ((b & 0x40) == 0){
 440                 len = ((b & 0x3f) << 8 | ptr [1]);
 441                 ptr += 2;
 442         } else if (b != 0xff) {
 443                 len = ((b & 0x1f) << 24) |
 444                         (ptr [1] << 16) |
 445                         (ptr [2] << 8) |
 446                         ptr [3];
 447                 ptr += 4;
 448         }
 449         else {
 450                 len = (ptr [1] << 24) | (ptr [2] << 16) | (ptr [3] << 8) | ptr [4];
 451                 ptr += 5;
 452         }
 453         if (rptr)
 454                 *rptr = ptr;
 455
 456         //printf ("DECODE: %d.\n", len);
 457         return len;
 458 }
 459
 460 static void
 461 serialize_variable (MonoDebugVarInfo *var, guint8 *p, guint8 **endbuf)
 462 {
 463         guint32 flags = var->index & MONO_DEBUG_VAR_ADDRESS_MODE_FLAGS;
 464
 465         encode_value (var->index, p, &p);
 466
 467         switch (flags) {
 468         case MONO_DEBUG_VAR_ADDRESS_MODE_REGISTER:
 469                 break;
 470         case MONO_DEBUG_VAR_ADDRESS_MODE_REGOFFSET:
 471                 encode_value (var->offset, p, &p);
 472                 break;
 473         case MONO_DEBUG_VAR_ADDRESS_MODE_DEAD:
 474                 break;
 475         default:
 476                 g_assert_not_reached ();
 477         }
 478         *endbuf = p;
 479 }
 480
 481 void
 482 mono_debug_serialize_debug_info (MonoCompile *cfg, guint8 **out_buf, guint32 *buf_len)
 483 {
 484         MonoDebugMethodJitInfo *jit;
 485         guint32 size, prev_offset, prev_native_offset;
 486         guint8 *buf, *p;
 487         int i;
 488
 489         /* Can't use cfg->debug_info as it is freed by close_method () */
 490         jit = mono_debug_find_method (cfg->method, mono_domain_get ());
 491         if (!jit) {
 492                 *buf_len = 0;
 493                 return;
 494         }
 495
 496         size = ((jit->num_params + jit->num_locals + 1) * 10) + (jit->num_line_numbers * 10) + 64;
 497         p = buf = g_malloc (size);
 498         encode_value (jit->epilogue_begin, p, &p);
 499         encode_value (jit->prologue_end, p, &p);
 500         encode_value (jit->code_size, p, &p);
 501
 502         for (i = 0; i < jit->num_params; ++i)
 503                 serialize_variable (&jit->params [i], p, &p);
 504
 505         if (mono_method_signature (cfg->method)->hasthis)
 506                 serialize_variable (jit->this_var, p, &p);
 507
 508         for (i = 0; i < jit->num_locals; i++)
 509                 serialize_variable (&jit->locals [i], p, &p);
 510
 511         encode_value (jit->num_line_numbers, p, &p);
 512
 513         prev_offset = 0;
 514         prev_native_offset = 0;
 515         for (i = 0; i < jit->num_line_numbers; ++i) {
 516                 /* Sometimes, the offset values are not in increasing order */
 517                 MonoDebugLineNumberEntry *lne = &jit->line_numbers [i];
 518                 encode_value (lne->il_offset - prev_offset, p, &p);
 519                 encode_value (lne->native_offset - prev_native_offset, p, &p);
 520                 prev_offset = lne->il_offset;
 521                 prev_native_offset = lne->native_offset;
 522         }
 523
 524         g_assert (p - buf < size);
 525
 526         *out_buf = buf;
 527         *buf_len = p - buf;
 528 }
 529
 530 static void
 531 deserialize_variable (MonoDebugVarInfo *var, guint8 *p, guint8 **endbuf)
 532 {
 533         guint32 flags;
 534
 535         var->index = decode_value (p, &p);
 536
 537         flags = var->index & MONO_DEBUG_VAR_ADDRESS_MODE_FLAGS;
 538
 539         switch (flags) {
 540         case MONO_DEBUG_VAR_ADDRESS_MODE_REGISTER:
 541                 break;
 542         case MONO_DEBUG_VAR_ADDRESS_MODE_REGOFFSET:
 543                 var->offset = decode_value (p, &p);
 544                 break;
 545         case MONO_DEBUG_VAR_ADDRESS_MODE_DEAD:
 546                 break;
 547         default:
 548                 g_assert_not_reached ();
 549         }
 550         *endbuf = p;
 551 }
 552
 553 static MonoDebugMethodJitInfo *
 554 deserialize_debug_info (MonoMethod *method, guint8 *code_start, guint8 *buf, guint32 buf_len)
 555 {
 556         MonoMethodHeader *header;
 557         gint32 offset, native_offset, prev_offset, prev_native_offset;
 558         MonoDebugMethodJitInfo *jit;
 559         guint8 *p;
 560         int i;
 561
 562         header = mono_method_get_header (method);
 563         g_assert (header);
 564
 565         jit = g_new0 (MonoDebugMethodJitInfo, 1);
 566         jit->code_start = code_start;
 567         jit->num_locals = header->num_locals;
 568         jit->locals = g_new0 (MonoDebugVarInfo, jit->num_locals);
 569         jit->num_params = mono_method_signature (method)->param_count;
 570         jit->params = g_new0 (MonoDebugVarInfo, jit->num_params);
 571
 572         p = buf;
 573         jit->epilogue_begin = decode_value (p, &p);
 574         jit->prologue_end = decode_value (p, &p);
 575         jit->code_size = decode_value (p, &p);
 576
 577         for (i = 0; i < jit->num_params; ++i)
 578                 deserialize_variable (&jit->params [i], p, &p);
 579
 580         if (mono_method_signature (method)->hasthis) {
 581                 jit->this_var = g_new0 (MonoDebugVarInfo, 1);
 582                 deserialize_variable (jit->this_var, p, &p);
 583         }
 584
 585         for (i = 0; i < jit->num_locals; i++)
 586                 deserialize_variable (&jit->locals [i], p, &p);
 587
 588         jit->num_line_numbers = decode_value (p, &p);
 589         jit->line_numbers = g_new0 (MonoDebugLineNumberEntry, jit->num_line_numbers);
 590
 591         prev_offset = 0;
 592         prev_native_offset = 0;
 593         for (i = 0; i < jit->num_line_numbers; ++i) {
 594                 MonoDebugLineNumberEntry *lne = &jit->line_numbers [i];
 595
 596                 offset = prev_offset + decode_value (p, &p);
 597                 native_offset = prev_native_offset + decode_value (p, &p);
 598
 599                 lne->native_offset = native_offset;
 600                 lne->il_offset = offset;
 601
 602                 prev_offset = offset;
 603                 prev_native_offset = native_offset;
 604         }
 605
 606         mono_metadata_free_mh (header);
 607         return jit;
 608 }
 609
 610 void
 611 mono_debug_add_aot_method (MonoDomain *domain, MonoMethod *method, guint8 *code_start,
 612                            guint8 *debug_info, guint32 debug_info_len)
 613 {
 614         MonoDebugMethodJitInfo *jit;
 615
 616         if (mono_debug_format == MONO_DEBUG_FORMAT_NONE)
 617                 return;
 618
 619         if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
 620             (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
 621             (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
 622             (method->flags & METHOD_ATTRIBUTE_ABSTRACT) ||
 623             (method->wrapper_type != MONO_WRAPPER_NONE))
 624                 return;
 625
 626         if (debug_info_len == 0)
 627                 return;
 628
 629         jit = deserialize_debug_info (method, code_start, debug_info, debug_info_len);
 630
 631         mono_debug_add_method (method, jit, domain);
 632
 633         mono_debug_add_vg_method (method, jit);
 634
 635         mono_debug_free_method_jit_info (jit);
 636 }
 637
 638 void
 639 mono_debug_add_icall_wrapper (MonoMethod *method, MonoJitICallInfo* callinfo)
 640 {
 641         if (mono_debug_format == MONO_DEBUG_FORMAT_NONE)
 642                 return;
 643
 644         // mono_debug_add_wrapper (method, callinfo->wrapper, callinfo->func);
 645 }
 646
 647 static void
 648 print_var_info (MonoDebugVarInfo *info, int idx, const char *name, const char *type)
 649 {
 650         switch (info->index & MONO_DEBUG_VAR_ADDRESS_MODE_FLAGS) {
 651         case MONO_DEBUG_VAR_ADDRESS_MODE_REGISTER:
 652                 g_print ("%s %s (%d) in register %s\n", type, name, idx, mono_arch_regname (info->index & (~MONO_DEBUG_VAR_ADDRESS_MODE_FLAGS)));
 653                 break;
 654         case MONO_DEBUG_VAR_ADDRESS_MODE_REGOFFSET:
 655                 g_print ("%s %s (%d) in memory: base register %s + %d\n", type, name, idx, mono_arch_regname (info->index & (~MONO_DEBUG_VAR_ADDRESS_MODE_FLAGS)), info->offset);
 656                 break;
 657         case MONO_DEBUG_VAR_ADDRESS_MODE_TWO_REGISTERS:
 658         default:
 659                 g_assert_not_reached ();
 660         }
 661 }
 662
 663 /**
 664  * mono_debug_print_locals:
 665  *
 666  * Prints to stdout the information about the local variables in
 667  * a method (if @only_arguments is false) or about the arguments.
 668  * The information includes the storage info (where the variable
 669  * lives, in a register or in memory).
 670  * The method is found by looking up what method has been emitted at
 671  * the instruction address @ip.
 672  * This is for use inside a debugger.
 673  */
 674 void
 675 mono_debug_print_vars (gpointer ip, gboolean only_arguments)
 676 {
 677         MonoDomain *domain = mono_domain_get ();
 678         MonoJitInfo *ji = mono_jit_info_table_find (domain, ip);
 679         MonoDebugMethodJitInfo *jit;
 680         int i;
 681
 682         if (!ji)
 683                 return;
 684
 685         jit = mono_debug_find_method (mono_jit_info_get_method (ji), domain);
 686         if (!jit)
 687                 return;
 688
 689         if (only_arguments) {
 690                 char **names;
 691                 names = g_new (char *, jit->num_params);
 692                 mono_method_get_param_names (mono_jit_info_get_method (ji), (const char **) names);
 693                 if (jit->this_var)
 694                         print_var_info (jit->this_var, 0, "this", "Arg");
 695                 for (i = 0; i < jit->num_params; ++i) {
 696                         print_var_info (&jit->params [i], i, names [i]? names [i]: "unknown name", "Arg");
 697                 }
 698                 g_free (names);
 699         } else {
 700                 for (i = 0; i < jit->num_locals; ++i) {
 701                         print_var_info (&jit->locals [i], i, "", "Local");
 702                 }
 703         }
 704         mono_debug_free_method_jit_info (jit);
 705 }
 706
 707 /*
 708  * The old Debugger breakpoint interface.
 709  *
 710  * This interface is used to insert breakpoints on methods which are not yet JITed.
 711  * The debugging code keeps a list of all such breakpoints and automatically inserts the
 712  * breakpoint when the method is JITed.
 713  */
 714
 715 static GPtrArray *breakpoints = NULL;
 716
 717 int
 718 mono_debugger_insert_breakpoint_full (MonoMethodDesc *desc)
 719 {
 720         static int last_breakpoint_id = 0;
 721         MiniDebugBreakpointInfo *info;
 722
 723         info = g_new0 (MiniDebugBreakpointInfo, 1);
 724         info->desc = desc;
 725         info->index = ++last_breakpoint_id;
 726
 727         if (!breakpoints)
 728                 breakpoints = g_ptr_array_new ();
 729
 730         g_ptr_array_add (breakpoints, info);
 731
 732         return info->index;
 733 }
 734
 735 int
 736 mono_debugger_remove_breakpoint (int breakpoint_id)
 737 {
 738         int i;
 739
 740         if (!breakpoints)
 741                 return 0;
 742
 743         for (i = 0; i < breakpoints->len; i++) {
 744                 MiniDebugBreakpointInfo *info = g_ptr_array_index (breakpoints, i);
 745
 746                 if (info->index != breakpoint_id)
 747                         continue;
 748
 749                 mono_method_desc_free (info->desc);
 750                 g_ptr_array_remove (breakpoints, info);
 751                 g_free (info);
 752                 return 1;
 753         }
 754
 755         return 0;
 756 }
 757
 758 int
 759 mono_debugger_insert_breakpoint (const gchar *method_name, gboolean include_namespace)
 760 {
 761         MonoMethodDesc *desc;
 762
 763         desc = mono_method_desc_new (method_name, include_namespace);
 764         if (!desc)
 765                 return 0;
 766
 767         return mono_debugger_insert_breakpoint_full (desc);
 768 }
 769
 770 int
 771 mono_debugger_method_has_breakpoint (MonoMethod *method)
 772 {
 773         int i;
 774
 775         if (!breakpoints)
 776                 return 0;
 777
 778         for (i = 0; i < breakpoints->len; i++) {
 779                 MiniDebugBreakpointInfo *info = g_ptr_array_index (breakpoints, i);
 780
 781                 if (!mono_method_desc_full_match (info->desc, method))
 782                         continue;
 783
 784                 return info->index;
 785         }
 786
 787         return 0;
 788 }
 789
 790 void
 791 mono_debugger_breakpoint_callback (MonoMethod *method, guint32 index)
 792 {
 793         mono_debugger_event (MONO_DEBUGGER_EVENT_JIT_BREAKPOINT, (guint64) (gsize) method, index);
 794 }
 795
 796 void
 797 mono_debugger_thread_created (gsize tid, MonoThread *thread, MonoJitTlsData *jit_tls, gpointer func)
 798 {
 799 #ifdef MONO_DEBUGGER_SUPPORTED
 800         size_t stsize = 0;
 801         guint8 *staddr = NULL;
 802         MonoDebuggerThreadInfo *info;
 803
 804         if (mono_debug_format == MONO_DEBUG_FORMAT_NONE)
 805                 return;
 806
 807         mono_debugger_lock ();
 808
 809         mono_thread_get_stack_bounds (&staddr, &stsize);
 810
 811         info = g_new0 (MonoDebuggerThreadInfo, 1);
 812         info->tid = tid;
 813         info->thread = thread->internal_thread;
 814         info->stack_start = (guint64) (gsize) staddr;
 815         info->signal_stack_start = (guint64) (gsize) jit_tls->signal_stack;
 816         info->stack_size = stsize;
 817         info->signal_stack_size = jit_tls->signal_stack_size;
 818         info->end_stack = (guint64) (gsize) GC_mono_debugger_get_stack_ptr ();
 819         info->lmf_addr = (guint64) (gsize) mono_get_lmf_addr ();
 820         info->jit_tls = jit_tls;
 821
 822         if (func)
 823                 info->thread_flags = MONO_DEBUGGER_THREAD_FLAGS_INTERNAL;
 824         if (thread->internal_thread->threadpool_thread)
 825                 info->thread_flags |= MONO_DEBUGGER_THREAD_FLAGS_THREADPOOL;
 826
 827         info->next = mono_debugger_thread_table;
 828         mono_debugger_thread_table = info;
 829
 830         mono_debugger_event (MONO_DEBUGGER_EVENT_THREAD_CREATED,
 831                              tid, (guint64) (gsize) info);
 832
 833         mono_debugger_unlock ();
 834 #endif /* MONO_DEBUGGER_SUPPORTED */
 835 }
 836
 837 void
 838 mono_debugger_thread_cleanup (MonoJitTlsData *jit_tls)
 839 {
 840 #ifdef MONO_DEBUGGER_SUPPORTED
 841         MonoDebuggerThreadInfo **ptr;
 842
 843         if (mono_debug_format == MONO_DEBUG_FORMAT_NONE)
 844                 return;
 845
 846         mono_debugger_lock ();
 847
 848         for (ptr = &mono_debugger_thread_table; *ptr; ptr = &(*ptr)->next) {
 849                 MonoDebuggerThreadInfo *info = *ptr;
 850
 851                 if (info->jit_tls != jit_tls)
 852                         continue;
 853
 854                 mono_debugger_event (MONO_DEBUGGER_EVENT_THREAD_CLEANUP,
 855                                      info->tid, (guint64) (gsize) info);
 856
 857                 *ptr = info->next;
 858                 g_free (info);
 859                 break;
 860         }
 861
 862         mono_debugger_unlock ();
 863 #endif
 864 }
 865
 866 void
 867 mono_debugger_extended_notification (MonoDebuggerEvent event, guint64 data, guint64 arg)
 868 {
 869 #ifdef MONO_DEBUGGER_SUPPORTED
 870         MonoDebuggerThreadInfo **ptr;
 871         MonoInternalThread *thread = mono_thread_internal_current ();
 872
 873         if (!mono_debug_using_mono_debugger ())
 874                 return;
 875
 876         mono_debugger_lock ();
 877
 878         for (ptr = &mono_debugger_thread_table; *ptr; ptr = &(*ptr)->next) {
 879                 MonoDebuggerThreadInfo *info = *ptr;
 880
 881                 if (info->thread != thread)
 882                         continue;
 883
 884                 if ((info->extended_notifications & (int) event) == 0)
 885                         continue;
 886
 887                 mono_debugger_event (event, data, arg);
 888         }
 889
 890         mono_debugger_unlock ();
 891 #endif
 892 }
 893
 894 void
 895 mono_debugger_trampoline_compiled (const guint8 *trampoline, MonoMethod *method, const guint8 *code)
 896 {
 897 #ifdef MONO_DEBUGGER_SUPPORTED
 898         struct {
 899                 const guint8 * trampoline;
 900                 MonoMethod *method;
 901                 const guint8 *code;
 902         } info = { trampoline, method, code };
 903
 904         mono_debugger_extended_notification (MONO_DEBUGGER_EVENT_OLD_TRAMPOLINE,
 905                                              (guint64) (gsize) method, (guint64) (gsize) code);
 906         mono_debugger_extended_notification (MONO_DEBUGGER_EVENT_TRAMPOLINE,
 907                                              (guint64) (gsize) &info, 0);
 908 #endif
 909 }
 910
 911 #if MONO_DEBUGGER_SUPPORTED
 912 static MonoDebuggerThreadInfo *
 913 find_debugger_thread_info (MonoInternalThread *thread)
 914 {
 915         MonoDebuggerThreadInfo **ptr;
 916
 917         for (ptr = &mono_debugger_thread_table; *ptr; ptr = &(*ptr)->next) {
 918                 MonoDebuggerThreadInfo *info = *ptr;
 919
 920                 if (info->thread == thread)
 921                         return info;
 922         }
 923
 924         return NULL;
 925 }
 926 #endif
 927
 928 MonoDebuggerExceptionAction
 929 _mono_debugger_throw_exception (gpointer addr, gpointer stack, MonoObject *exc)
 930 {
 931 #ifdef MONO_DEBUGGER_SUPPORTED
 932         MonoDebuggerExceptionInfo exc_info;
 933         MonoDebuggerThreadInfo *thread_info;
 934
 935         if (!mono_debug_using_mono_debugger ())
 936                 return MONO_DEBUGGER_EXCEPTION_ACTION_NONE;
 937
 938         mono_debugger_lock ();
 939
 940         thread_info = find_debugger_thread_info (mono_thread_internal_current ());
 941         if (!thread_info) {
 942                 mono_debugger_unlock ();
 943                 return MONO_DEBUGGER_EXCEPTION_ACTION_NONE;
 944         }
 945
 946         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED) != 0) {
 947                 mono_debugger_unlock ();
 948                 return MONO_DEBUGGER_EXCEPTION_ACTION_NONE;
 949         }
 950
 951         if (thread_info->exception_state.stopped_on_exception ||
 952             thread_info->exception_state.stopped_on_unhandled) {
 953                 thread_info->exception_state.stopped_on_exception = 0;
 954                 mono_debugger_unlock ();
 955                 return MONO_DEBUGGER_EXCEPTION_ACTION_NONE;
 956         }
 957
 958         /* Protect the exception object from being garbage collected. */
 959
 960         thread_info->exception_state.stopped_on_unhandled = 0;
 961         thread_info->exception_state.stopped_on_exception = 1;
 962         thread_info->exception_state.last_exception = exc;
 963
 964         /*
 965          * Backwards compatibility:
 966          *
 967          * Older debugger versions only know `exc_info.stop' and older runtime versions check
 968          * `exc_info.stop != 0'.
 969          *
 970          * The debugger must check for `mono_debug_debugger_version >= 5' before accessing the
 971          * `stop_unhandled' field.
 972          */
 973
 974         exc_info.stack_pointer = stack;
 975         exc_info.exception_obj = exc;
 976         exc_info.stop = 0;
 977         exc_info.stop_unhandled = 0;
 978
 979         mono_debugger_event (MONO_DEBUGGER_EVENT_THROW_EXCEPTION, (guint64) (gsize) &exc_info,
 980                              (guint64) (gsize) addr);
 981
 982         if (!exc_info.stop) {
 983                 thread_info->exception_state.stopped_on_exception = 0;
 984                 thread_info->exception_state.last_exception = NULL;
 985         }
 986
 987         mono_debugger_unlock ();
 988
 989         if (exc_info.stop)
 990                 return MONO_DEBUGGER_EXCEPTION_ACTION_STOP;
 991         else if (exc_info.stop_unhandled)
 992                 return MONO_DEBUGGER_EXCEPTION_ACTION_STOP_UNHANDLED;
 993 #endif
 994
 995         return MONO_DEBUGGER_EXCEPTION_ACTION_NONE;
 996 }
 997
 998 gboolean
 999 _mono_debugger_unhandled_exception (gpointer addr, gpointer stack, MonoObject *exc)
1000 {
1001 #ifdef MONO_DEBUGGER_SUPPORTED
1002         MonoDebuggerThreadInfo *thread_info;
1003
1004         if (!mono_debug_using_mono_debugger ())
1005                 return FALSE;
1006
1007         if (exc) {
1008                 const gchar *name = mono_class_get_name (mono_object_get_class (exc));
1009                 if (!strcmp (name, "ThreadAbortException"))
1010                         return FALSE;
1011         }
1012
1013         mono_debugger_lock ();
1014
1015         thread_info = find_debugger_thread_info (mono_thread_internal_current ());
1016         if (!thread_info) {
1017                 mono_debugger_unlock ();
1018                 return FALSE;
1019         }
1020
1021         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED) != 0) {
1022                 mono_debugger_unlock ();
1023                 return FALSE;
1024         }
1025
1026         if (thread_info->exception_state.stopped_on_unhandled) {
1027                 thread_info->exception_state.stopped_on_unhandled = 0;
1028                 mono_debugger_unlock ();
1029                 return FALSE;
1030         }
1031
1032         thread_info->exception_state.stopped_on_unhandled = 1;
1033         thread_info->exception_state.last_exception = exc;
1034
1035         mono_debugger_event (MONO_DEBUGGER_EVENT_UNHANDLED_EXCEPTION,
1036                              (guint64) (gsize) exc, (guint64) (gsize) addr);
1037
1038         return TRUE;
1039 #else
1040         return FALSE;
1041 #endif
1042 }
1043
1044 /*
1045  * mono_debugger_call_exception_handler:
1046  *
1047  * Called from mono_handle_exception_internal() to tell the debugger that we're about
1048  * to invoke an exception handler.
1049  *
1050  * The debugger may choose to set a breakpoint at @addr.  This is used if the user is
1051  * single-stepping from a `try' into a `catch' block, for instance.
1052  */
1053
1054 void
1055 mono_debugger_call_exception_handler (gpointer addr, gpointer stack, MonoObject *exc)
1056 {
1057 #ifdef MONO_DEBUGGER_SUPPORTED
1058         MonoDebuggerThreadInfo *thread_info;
1059         MonoDebuggerExceptionInfo exc_info;
1060
1061         if (!mono_debug_using_mono_debugger ())
1062                 return;
1063
1064         mono_debugger_lock ();
1065
1066         thread_info = find_debugger_thread_info (mono_thread_internal_current ());
1067         if (!thread_info) {
1068                 mono_debugger_unlock ();
1069                 return;
1070         }
1071
1072         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED) != 0) {
1073                 mono_debugger_unlock ();
1074                 return;
1075         }
1076
1077         // Prevent the object from being finalized.
1078         thread_info->exception_state.last_exception = exc;
1079
1080         exc_info.stack_pointer = stack;
1081         exc_info.exception_obj = exc;
1082         exc_info.stop = 0;
1083         exc_info.stop_unhandled = 0;
1084
1085         mono_debugger_event (MONO_DEBUGGER_EVENT_HANDLE_EXCEPTION, (guint64) (gsize) &exc_info,
1086                              (guint64) (gsize) addr);
1087
1088         mono_debugger_unlock ();
1089 #endif
1090 }
1091
1092 #ifdef MONO_DEBUGGER_SUPPORTED
1093
1094 static gchar *
1095 get_exception_message (MonoObject *exc)
1096 {
1097         char *message = NULL;
1098         MonoString *str;
1099         MonoMethod *method;
1100         MonoClass *klass;
1101         gint i;
1102
1103         if (mono_object_isinst (exc, mono_defaults.exception_class)) {
1104                 klass = exc->vtable->klass;
1105                 method = NULL;
1106                 while (klass && method == NULL) {
1107                         for (i = 0; i < klass->method.count; ++i) {
1108                                 method = klass->methods [i];
1109                                 if (!strcmp ("ToString", method->name) &&
1110                                     mono_method_signature (method)->param_count == 0 &&
1111                                     method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
1112                                     method->flags & METHOD_ATTRIBUTE_PUBLIC) {
1113                                         break;
1114                                 }
1115                                 method = NULL;
1116                         }
1117
1118                         if (method == NULL)
1119                                 klass = klass->parent;
1120                 }
1121
1122                 g_assert (method);
1123
1124                 str = (MonoString *) mono_runtime_invoke (method, exc, NULL, NULL);
1125                 if (str)
1126                         message = mono_string_to_utf8 (str);
1127         }
1128
1129         return message;
1130 }
1131
1132 MonoObject *
1133 mono_debugger_runtime_invoke (MonoMethod *method, void *obj, void **params, MonoObject **exc)
1134 {
1135         MonoDebuggerThreadInfo *thread_info;
1136         MonoDebuggerExceptionState saved_exception_state;
1137         MonoObject *retval;
1138         gchar *message;
1139
1140         mono_debugger_lock ();
1141
1142         thread_info = find_debugger_thread_info (mono_thread_internal_current ());
1143         if (!thread_info) {
1144                 mono_debugger_unlock ();
1145                 return NULL;
1146         }
1147
1148         saved_exception_state = thread_info->exception_state;
1149
1150         thread_info->exception_state.last_exception = NULL;
1151         thread_info->exception_state.stopped_on_unhandled = 0;
1152         thread_info->exception_state.stopped_on_exception = 0;
1153
1154         thread_info->internal_flags |= MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_IN_RUNTIME_INVOKE;
1155
1156         mono_debugger_unlock ();
1157
1158         if (!strcmp (method->name, ".ctor")) {
1159                 retval = obj = mono_object_new (mono_domain_get (), method->klass);
1160
1161                 mono_runtime_invoke (method, obj, params, exc);
1162         } else
1163                 retval = mono_runtime_invoke (method, obj, params, exc);
1164
1165         mono_debugger_lock ();
1166
1167         thread_info->exception_state = saved_exception_state;
1168         thread_info->internal_flags &= ~MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_IN_RUNTIME_INVOKE;
1169
1170         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED) != 0) {
1171                 thread_info->internal_flags &= ~MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED;
1172                 mono_thread_internal_reset_abort (thread_info->thread);
1173
1174                 mono_debugger_unlock ();
1175
1176                 *exc = NULL;
1177                 return NULL;
1178         }
1179
1180         mono_debugger_unlock ();
1181
1182         if (!exc || (*exc == NULL))
1183                 return retval;
1184
1185         retval = *exc;
1186         message = get_exception_message (*exc);
1187         if (message) {
1188                 *exc = (MonoObject *) mono_string_new_wrapper (message);
1189                 g_free (message);
1190         }
1191
1192         return retval;
1193 }
1194
1195 gboolean
1196 mono_debugger_abort_runtime_invoke ()
1197 {
1198         MonoInternalThread *thread = mono_thread_internal_current ();
1199         MonoDebuggerThreadInfo *thread_info;
1200
1201         mono_debugger_lock ();
1202
1203         thread_info = find_debugger_thread_info (thread);
1204         if (!thread_info) {
1205                 mono_debugger_unlock ();
1206                 return FALSE;
1207         }
1208
1209         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_IN_RUNTIME_INVOKE) == 0) {
1210                 mono_debugger_unlock ();
1211                 return FALSE;
1212         }
1213
1214         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED) != 0) {
1215                 mono_debugger_unlock ();
1216                 return TRUE;
1217         }
1218
1219         thread_info->internal_flags |= MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED;
1220         ves_icall_System_Threading_Thread_Abort (thread_info->thread, NULL);
1221
1222         mono_debugger_unlock ();
1223         return TRUE;
1224 }
1225
1226 #endif