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         g_array_free (info->line_numbers, TRUE);
 324         g_free (info);
 325 }
 326
 327 void
 328 mono_debug_record_line_number (MonoCompile *cfg, MonoInst *ins, guint32 address)
 329 {
 330         MiniDebugMethodInfo *info;
 331         MonoMethodHeader *header;
 332         guint32 offset;
 333
 334         info = (MiniDebugMethodInfo *) cfg->debug_info;
 335         if (!info || !info->jit || !ins->cil_code)
 336                 return;
 337
 338         header = cfg->header;
 339         g_assert (header);
 340
 341         if ((ins->cil_code < header->code) ||
 342             (ins->cil_code > header->code + header->code_size))
 343                 return;
 344
 345         offset = ins->cil_code - header->code;
 346         if (!info->has_line_numbers) {
 347                 info->jit->prologue_end = address;
 348                 info->has_line_numbers = TRUE;
 349         }
 350
 351         record_line_number (info, address, offset);
 352 }
 353
 354 void
 355 mono_debug_open_block (MonoCompile *cfg, MonoBasicBlock *bb, guint32 address)
 356 {
 357         MiniDebugMethodInfo *info;
 358         MonoMethodHeader *header;
 359         guint32 offset;
 360
 361         info = (MiniDebugMethodInfo *) cfg->debug_info;
 362         if (!info || !info->jit || !bb->cil_code)
 363                 return;
 364
 365         header = cfg->header;
 366         g_assert (header);
 367
 368         if ((bb->cil_code < header->code) ||
 369             (bb->cil_code > header->code + header->code_size))
 370                 return;
 371
 372         offset = bb->cil_code - header->code;
 373         if (!info->has_line_numbers) {
 374                 info->jit->prologue_end = address;
 375                 info->has_line_numbers = TRUE;
 376         }
 377
 378         record_line_number (info, address, offset);
 379 }
 380
 381 static inline void
 382 encode_value (gint32 value, guint8 *buf, guint8 **endbuf)
 383 {
 384         guint8 *p = buf;
 385
 386         //printf ("ENCODE: %d 0x%x.\n", value, value);
 387
 388         /*
 389          * Same encoding as the one used in the metadata, extended to handle values
 390          * greater than 0x1fffffff.
 391          */
 392         if ((value >= 0) && (value <= 127))
 393                 *p++ = value;
 394         else if ((value >= 0) && (value <= 16383)) {
 395                 p [0] = 0x80 | (value >> 8);
 396                 p [1] = value & 0xff;
 397                 p += 2;
 398         } else if ((value >= 0) && (value <= 0x1fffffff)) {
 399                 p [0] = (value >> 24) | 0xc0;
 400                 p [1] = (value >> 16) & 0xff;
 401                 p [2] = (value >> 8) & 0xff;
 402                 p [3] = value & 0xff;
 403                 p += 4;
 404         }
 405         else {
 406                 p [0] = 0xff;
 407                 p [1] = (value >> 24) & 0xff;
 408                 p [2] = (value >> 16) & 0xff;
 409                 p [3] = (value >> 8) & 0xff;
 410                 p [4] = value & 0xff;
 411                 p += 5;
 412         }
 413         if (endbuf)
 414                 *endbuf = p;
 415 }
 416
 417 static inline gint32
 418 decode_value (guint8 *ptr, guint8 **rptr)
 419 {
 420         guint8 b = *ptr;
 421         gint32 len;
 422
 423         if ((b & 0x80) == 0){
 424                 len = b;
 425                 ++ptr;
 426         } else if ((b & 0x40) == 0){
 427                 len = ((b & 0x3f) << 8 | ptr [1]);
 428                 ptr += 2;
 429         } else if (b != 0xff) {
 430                 len = ((b & 0x1f) << 24) |
 431                         (ptr [1] << 16) |
 432                         (ptr [2] << 8) |
 433                         ptr [3];
 434                 ptr += 4;
 435         }
 436         else {
 437                 len = (ptr [1] << 24) | (ptr [2] << 16) | (ptr [3] << 8) | ptr [4];
 438                 ptr += 5;
 439         }
 440         if (rptr)
 441                 *rptr = ptr;
 442
 443         //printf ("DECODE: %d.\n", len);
 444         return len;
 445 }
 446
 447 static void
 448 serialize_variable (MonoDebugVarInfo *var, guint8 *p, guint8 **endbuf)
 449 {
 450         guint32 flags = var->index & MONO_DEBUG_VAR_ADDRESS_MODE_FLAGS;
 451
 452         encode_value (var->index, p, &p);
 453
 454         switch (flags) {
 455         case MONO_DEBUG_VAR_ADDRESS_MODE_REGISTER:
 456                 break;
 457         case MONO_DEBUG_VAR_ADDRESS_MODE_REGOFFSET:
 458                 encode_value (var->offset, p, &p);
 459                 break;
 460         case MONO_DEBUG_VAR_ADDRESS_MODE_DEAD:
 461                 break;
 462         default:
 463                 g_assert_not_reached ();
 464         }
 465         *endbuf = p;
 466 }
 467
 468 void
 469 mono_debug_serialize_debug_info (MonoCompile *cfg, guint8 **out_buf, guint32 *buf_len)
 470 {
 471         MonoDebugMethodJitInfo *jit;
 472         guint32 size, prev_offset, prev_native_offset;
 473         guint8 *buf, *p;
 474         int i;
 475
 476         /* Can't use cfg->debug_info as it is freed by close_method () */
 477         jit = mono_debug_find_method (cfg->method, mono_domain_get ());
 478         if (!jit) {
 479                 *buf_len = 0;
 480                 return;
 481         }
 482
 483         size = ((jit->num_params + jit->num_locals + 1) * 10) + (jit->num_line_numbers * 10) + 64;
 484         p = buf = g_malloc (size);
 485         encode_value (jit->epilogue_begin, p, &p);
 486         encode_value (jit->prologue_end, p, &p);
 487         encode_value (jit->code_size, p, &p);
 488
 489         for (i = 0; i < jit->num_params; ++i)
 490                 serialize_variable (&jit->params [i], p, &p);
 491
 492         if (mono_method_signature (cfg->method)->hasthis)
 493                 serialize_variable (jit->this_var, p, &p);
 494
 495         for (i = 0; i < jit->num_locals; i++)
 496                 serialize_variable (&jit->locals [i], p, &p);
 497
 498         encode_value (jit->num_line_numbers, p, &p);
 499
 500         prev_offset = 0;
 501         prev_native_offset = 0;
 502         for (i = 0; i < jit->num_line_numbers; ++i) {
 503                 /* Sometimes, the offset values are not in increasing order */
 504                 MonoDebugLineNumberEntry *lne = &jit->line_numbers [i];
 505                 encode_value (lne->il_offset - prev_offset, p, &p);
 506                 encode_value (lne->native_offset - prev_native_offset, p, &p);
 507                 prev_offset = lne->il_offset;
 508                 prev_native_offset = lne->native_offset;
 509         }
 510
 511         g_assert (p - buf < size);
 512
 513         *out_buf = buf;
 514         *buf_len = p - buf;
 515 }
 516
 517 static void
 518 deserialize_variable (MonoDebugVarInfo *var, guint8 *p, guint8 **endbuf)
 519 {
 520         guint32 flags;
 521
 522         var->index = decode_value (p, &p);
 523
 524         flags = var->index & MONO_DEBUG_VAR_ADDRESS_MODE_FLAGS;
 525
 526         switch (flags) {
 527         case MONO_DEBUG_VAR_ADDRESS_MODE_REGISTER:
 528                 break;
 529         case MONO_DEBUG_VAR_ADDRESS_MODE_REGOFFSET:
 530                 var->offset = decode_value (p, &p);
 531                 break;
 532         case MONO_DEBUG_VAR_ADDRESS_MODE_DEAD:
 533                 break;
 534         default:
 535                 g_assert_not_reached ();
 536         }
 537         *endbuf = p;
 538 }
 539
 540 static MonoDebugMethodJitInfo *
 541 deserialize_debug_info (MonoMethod *method, guint8 *code_start, guint8 *buf, guint32 buf_len)
 542 {
 543         MonoMethodHeader *header;
 544         gint32 offset, native_offset, prev_offset, prev_native_offset;
 545         MonoDebugMethodJitInfo *jit;
 546         guint8 *p;
 547         int i;
 548
 549         header = mono_method_get_header (method);
 550         g_assert (header);
 551
 552         jit = g_new0 (MonoDebugMethodJitInfo, 1);
 553         jit->code_start = code_start;
 554         jit->num_locals = header->num_locals;
 555         jit->locals = g_new0 (MonoDebugVarInfo, jit->num_locals);
 556         jit->num_params = mono_method_signature (method)->param_count;
 557         jit->params = g_new0 (MonoDebugVarInfo, jit->num_params);
 558
 559         p = buf;
 560         jit->epilogue_begin = decode_value (p, &p);
 561         jit->prologue_end = decode_value (p, &p);
 562         jit->code_size = decode_value (p, &p);
 563
 564         for (i = 0; i < jit->num_params; ++i)
 565                 deserialize_variable (&jit->params [i], p, &p);
 566
 567         if (mono_method_signature (method)->hasthis) {
 568                 jit->this_var = g_new0 (MonoDebugVarInfo, 1);
 569                 deserialize_variable (jit->this_var, p, &p);
 570         }
 571
 572         for (i = 0; i < jit->num_locals; i++)
 573                 deserialize_variable (&jit->locals [i], p, &p);
 574
 575         jit->num_line_numbers = decode_value (p, &p);
 576         jit->line_numbers = g_new0 (MonoDebugLineNumberEntry, jit->num_line_numbers);
 577
 578         prev_offset = 0;
 579         prev_native_offset = 0;
 580         for (i = 0; i < jit->num_line_numbers; ++i) {
 581                 MonoDebugLineNumberEntry *lne = &jit->line_numbers [i];
 582
 583                 offset = prev_offset + decode_value (p, &p);
 584                 native_offset = prev_native_offset + decode_value (p, &p);
 585
 586                 lne->native_offset = native_offset;
 587                 lne->il_offset = offset;
 588
 589                 prev_offset = offset;
 590                 prev_native_offset = native_offset;
 591         }
 592
 593         mono_metadata_free_mh (header);
 594         return jit;
 595 }
 596
 597 void
 598 mono_debug_add_aot_method (MonoDomain *domain, MonoMethod *method, guint8 *code_start,
 599                            guint8 *debug_info, guint32 debug_info_len)
 600 {
 601         MonoDebugMethodJitInfo *jit;
 602
 603         if (mono_debug_format == MONO_DEBUG_FORMAT_NONE)
 604                 return;
 605
 606         if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
 607             (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
 608             (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
 609             (method->flags & METHOD_ATTRIBUTE_ABSTRACT) ||
 610             (method->wrapper_type != MONO_WRAPPER_NONE))
 611                 return;
 612
 613         if (debug_info_len == 0)
 614                 return;
 615
 616         jit = deserialize_debug_info (method, code_start, debug_info, debug_info_len);
 617
 618         mono_debug_add_method (method, jit, domain);
 619
 620         mono_debug_add_vg_method (method, jit);
 621
 622         mono_debug_free_method_jit_info (jit);
 623 }
 624
 625 void
 626 mono_debug_add_icall_wrapper (MonoMethod *method, MonoJitICallInfo* callinfo)
 627 {
 628         if (mono_debug_format == MONO_DEBUG_FORMAT_NONE)
 629                 return;
 630
 631         // mono_debug_add_wrapper (method, callinfo->wrapper, callinfo->func);
 632 }
 633
 634 static void
 635 print_var_info (MonoDebugVarInfo *info, int idx, const char *name, const char *type)
 636 {
 637         switch (info->index & MONO_DEBUG_VAR_ADDRESS_MODE_FLAGS) {
 638         case MONO_DEBUG_VAR_ADDRESS_MODE_REGISTER:
 639                 g_print ("%s %s (%d) in register %s\n", type, name, idx, mono_arch_regname (info->index & (~MONO_DEBUG_VAR_ADDRESS_MODE_FLAGS)));
 640                 break;
 641         case MONO_DEBUG_VAR_ADDRESS_MODE_REGOFFSET:
 642                 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);
 643                 break;
 644         case MONO_DEBUG_VAR_ADDRESS_MODE_TWO_REGISTERS:
 645         default:
 646                 g_assert_not_reached ();
 647         }
 648 }
 649
 650 /**
 651  * mono_debug_print_locals:
 652  *
 653  * Prints to stdout the information about the local variables in
 654  * a method (if @only_arguments is false) or about the arguments.
 655  * The information includes the storage info (where the variable
 656  * lives, in a register or in memory).
 657  * The method is found by looking up what method has been emitted at
 658  * the instruction address @ip.
 659  * This is for use inside a debugger.
 660  */
 661 void
 662 mono_debug_print_vars (gpointer ip, gboolean only_arguments)
 663 {
 664         MonoDomain *domain = mono_domain_get ();
 665         MonoJitInfo *ji = mono_jit_info_table_find (domain, ip);
 666         MonoDebugMethodJitInfo *jit;
 667         int i;
 668
 669         if (!ji)
 670                 return;
 671
 672         jit = mono_debug_find_method (mono_jit_info_get_method (ji), domain);
 673         if (!jit)
 674                 return;
 675
 676         if (only_arguments) {
 677                 char **names;
 678                 names = g_new (char *, jit->num_params);
 679                 mono_method_get_param_names (mono_jit_info_get_method (ji), (const char **) names);
 680                 if (jit->this_var)
 681                         print_var_info (jit->this_var, 0, "this", "Arg");
 682                 for (i = 0; i < jit->num_params; ++i) {
 683                         print_var_info (&jit->params [i], i, names [i]? names [i]: "unknown name", "Arg");
 684                 }
 685                 g_free (names);
 686         } else {
 687                 for (i = 0; i < jit->num_locals; ++i) {
 688                         print_var_info (&jit->locals [i], i, "", "Local");
 689                 }
 690         }
 691         mono_debug_free_method_jit_info (jit);
 692 }
 693
 694 /*
 695  * The old Debugger breakpoint interface.
 696  *
 697  * This interface is used to insert breakpoints on methods which are not yet JITed.
 698  * The debugging code keeps a list of all such breakpoints and automatically inserts the
 699  * breakpoint when the method is JITed.
 700  */
 701
 702 static GPtrArray *breakpoints = NULL;
 703
 704 int
 705 mono_debugger_insert_breakpoint_full (MonoMethodDesc *desc)
 706 {
 707         static int last_breakpoint_id = 0;
 708         MiniDebugBreakpointInfo *info;
 709
 710         info = g_new0 (MiniDebugBreakpointInfo, 1);
 711         info->desc = desc;
 712         info->index = ++last_breakpoint_id;
 713
 714         if (!breakpoints)
 715                 breakpoints = g_ptr_array_new ();
 716
 717         g_ptr_array_add (breakpoints, info);
 718
 719         return info->index;
 720 }
 721
 722 int
 723 mono_debugger_remove_breakpoint (int breakpoint_id)
 724 {
 725         int i;
 726
 727         if (!breakpoints)
 728                 return 0;
 729
 730         for (i = 0; i < breakpoints->len; i++) {
 731                 MiniDebugBreakpointInfo *info = g_ptr_array_index (breakpoints, i);
 732
 733                 if (info->index != breakpoint_id)
 734                         continue;
 735
 736                 mono_method_desc_free (info->desc);
 737                 g_ptr_array_remove (breakpoints, info);
 738                 g_free (info);
 739                 return 1;
 740         }
 741
 742         return 0;
 743 }
 744
 745 int
 746 mono_debugger_insert_breakpoint (const gchar *method_name, gboolean include_namespace)
 747 {
 748         MonoMethodDesc *desc;
 749
 750         desc = mono_method_desc_new (method_name, include_namespace);
 751         if (!desc)
 752                 return 0;
 753
 754         return mono_debugger_insert_breakpoint_full (desc);
 755 }
 756
 757 int
 758 mono_debugger_method_has_breakpoint (MonoMethod *method)
 759 {
 760         int i;
 761
 762         if (!breakpoints || ((method->wrapper_type != MONO_WRAPPER_NONE) &&
 763                                                  (method->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD)))
 764                 return 0;
 765
 766         for (i = 0; i < breakpoints->len; i++) {
 767                 MiniDebugBreakpointInfo *info = g_ptr_array_index (breakpoints, i);
 768
 769                 if (!mono_method_desc_full_match (info->desc, method))
 770                         continue;
 771
 772                 return info->index;
 773         }
 774
 775         return 0;
 776 }
 777
 778 void
 779 mono_debugger_breakpoint_callback (MonoMethod *method, guint32 index)
 780 {
 781         mono_debugger_event (MONO_DEBUGGER_EVENT_JIT_BREAKPOINT, (guint64) (gsize) method, index);
 782 }
 783
 784 void
 785 mono_debugger_thread_created (gsize tid, MonoThread *thread, MonoJitTlsData *jit_tls, gpointer func)
 786 {
 787 #ifdef MONO_DEBUGGER_SUPPORTED
 788         size_t stsize = 0;
 789         guint8 *staddr = NULL;
 790         MonoDebuggerThreadInfo *info;
 791
 792         if (mono_debug_format == MONO_DEBUG_FORMAT_NONE)
 793                 return;
 794
 795         mono_debugger_lock ();
 796
 797         mono_thread_get_stack_bounds (&staddr, &stsize);
 798
 799         info = g_new0 (MonoDebuggerThreadInfo, 1);
 800         info->tid = tid;
 801         info->thread = thread->internal_thread;
 802         info->stack_start = (guint64) (gsize) staddr;
 803         info->signal_stack_start = (guint64) (gsize) jit_tls->signal_stack;
 804         info->stack_size = stsize;
 805         info->signal_stack_size = jit_tls->signal_stack_size;
 806         info->end_stack = (guint64) (gsize) GC_mono_debugger_get_stack_ptr ();
 807         info->lmf_addr = (guint64) (gsize) mono_get_lmf_addr ();
 808         info->jit_tls = jit_tls;
 809
 810         if (func)
 811                 info->thread_flags = MONO_DEBUGGER_THREAD_FLAGS_INTERNAL;
 812         if (thread->internal_thread->threadpool_thread)
 813                 info->thread_flags |= MONO_DEBUGGER_THREAD_FLAGS_THREADPOOL;
 814
 815         info->next = mono_debugger_thread_table;
 816         mono_debugger_thread_table = info;
 817
 818         mono_debugger_event (MONO_DEBUGGER_EVENT_THREAD_CREATED,
 819                              tid, (guint64) (gsize) info);
 820
 821         mono_debugger_unlock ();
 822 #endif /* MONO_DEBUGGER_SUPPORTED */
 823 }
 824
 825 void
 826 mono_debugger_thread_cleanup (MonoJitTlsData *jit_tls)
 827 {
 828 #ifdef MONO_DEBUGGER_SUPPORTED
 829         MonoDebuggerThreadInfo **ptr;
 830
 831         if (mono_debug_format == MONO_DEBUG_FORMAT_NONE)
 832                 return;
 833
 834         mono_debugger_lock ();
 835
 836         for (ptr = &mono_debugger_thread_table; *ptr; ptr = &(*ptr)->next) {
 837                 MonoDebuggerThreadInfo *info = *ptr;
 838
 839                 if (info->jit_tls != jit_tls)
 840                         continue;
 841
 842                 mono_debugger_event (MONO_DEBUGGER_EVENT_THREAD_CLEANUP,
 843                                      info->tid, (guint64) (gsize) info);
 844
 845                 *ptr = info->next;
 846                 g_free (info);
 847                 break;
 848         }
 849
 850         mono_debugger_unlock ();
 851 #endif
 852 }
 853
 854 void
 855 mono_debugger_extended_notification (MonoDebuggerEvent event, guint64 data, guint64 arg)
 856 {
 857 #ifdef MONO_DEBUGGER_SUPPORTED
 858         MonoDebuggerThreadInfo **ptr;
 859         MonoInternalThread *thread = mono_thread_internal_current ();
 860
 861         if (!mono_debug_using_mono_debugger ())
 862                 return;
 863
 864         mono_debugger_lock ();
 865
 866         for (ptr = &mono_debugger_thread_table; *ptr; ptr = &(*ptr)->next) {
 867                 MonoDebuggerThreadInfo *info = *ptr;
 868
 869                 if (info->thread != thread)
 870                         continue;
 871
 872                 if ((info->extended_notifications & (int) event) == 0)
 873                         continue;
 874
 875                 mono_debugger_event (event, data, arg);
 876         }
 877
 878         mono_debugger_unlock ();
 879 #endif
 880 }
 881
 882 void
 883 mono_debugger_trampoline_compiled (const guint8 *trampoline, MonoMethod *method, const guint8 *code)
 884 {
 885 #ifdef MONO_DEBUGGER_SUPPORTED
 886         struct {
 887                 const guint8 * trampoline;
 888                 MonoMethod *method;
 889                 const guint8 *code;
 890         } info = { trampoline, method, code };
 891
 892         mono_debugger_extended_notification (MONO_DEBUGGER_EVENT_OLD_TRAMPOLINE,
 893                                              (guint64) (gsize) method, (guint64) (gsize) code);
 894         mono_debugger_extended_notification (MONO_DEBUGGER_EVENT_TRAMPOLINE,
 895                                              (guint64) (gsize) &info, 0);
 896 #endif
 897 }
 898
 899 #if MONO_DEBUGGER_SUPPORTED
 900 static MonoDebuggerThreadInfo *
 901 find_debugger_thread_info (MonoInternalThread *thread)
 902 {
 903         MonoDebuggerThreadInfo **ptr;
 904
 905         for (ptr = &mono_debugger_thread_table; *ptr; ptr = &(*ptr)->next) {
 906                 MonoDebuggerThreadInfo *info = *ptr;
 907
 908                 if (info->thread == thread)
 909                         return info;
 910         }
 911
 912         return NULL;
 913 }
 914 #endif
 915
 916 MonoDebuggerExceptionAction
 917 _mono_debugger_throw_exception (gpointer addr, gpointer stack, MonoObject *exc)
 918 {
 919 #ifdef MONO_DEBUGGER_SUPPORTED
 920         MonoDebuggerExceptionInfo exc_info;
 921         MonoDebuggerThreadInfo *thread_info;
 922
 923         if (!mono_debug_using_mono_debugger ())
 924                 return MONO_DEBUGGER_EXCEPTION_ACTION_NONE;
 925
 926         mono_debugger_lock ();
 927
 928         thread_info = find_debugger_thread_info (mono_thread_internal_current ());
 929         if (!thread_info) {
 930                 mono_debugger_unlock ();
 931                 return MONO_DEBUGGER_EXCEPTION_ACTION_NONE;
 932         }
 933
 934         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED) != 0) {
 935                 mono_debugger_unlock ();
 936                 return MONO_DEBUGGER_EXCEPTION_ACTION_NONE;
 937         }
 938
 939         if (thread_info->exception_state.stopped_on_exception ||
 940             thread_info->exception_state.stopped_on_unhandled) {
 941                 thread_info->exception_state.stopped_on_exception = 0;
 942                 mono_debugger_unlock ();
 943                 return MONO_DEBUGGER_EXCEPTION_ACTION_NONE;
 944         }
 945
 946         /* Protect the exception object from being garbage collected. */
 947
 948         thread_info->exception_state.stopped_on_unhandled = 0;
 949         thread_info->exception_state.stopped_on_exception = 1;
 950         thread_info->exception_state.last_exception = exc;
 951
 952         /*
 953          * Backwards compatibility:
 954          *
 955          * Older debugger versions only know `exc_info.stop' and older runtime versions check
 956          * `exc_info.stop != 0'.
 957          *
 958          * The debugger must check for `mono_debug_debugger_version >= 5' before accessing the
 959          * `stop_unhandled' field.
 960          */
 961
 962         exc_info.stack_pointer = stack;
 963         exc_info.exception_obj = exc;
 964         exc_info.stop = 0;
 965         exc_info.stop_unhandled = 0;
 966
 967         mono_debugger_event (MONO_DEBUGGER_EVENT_THROW_EXCEPTION, (guint64) (gsize) &exc_info,
 968                              (guint64) (gsize) addr);
 969
 970         if (!exc_info.stop) {
 971                 thread_info->exception_state.stopped_on_exception = 0;
 972                 thread_info->exception_state.last_exception = NULL;
 973         }
 974
 975         mono_debugger_unlock ();
 976
 977         if (exc_info.stop)
 978                 return MONO_DEBUGGER_EXCEPTION_ACTION_STOP;
 979         else if (exc_info.stop_unhandled)
 980                 return MONO_DEBUGGER_EXCEPTION_ACTION_STOP_UNHANDLED;
 981 #endif
 982
 983         return MONO_DEBUGGER_EXCEPTION_ACTION_NONE;
 984 }
 985
 986 gboolean
 987 _mono_debugger_unhandled_exception (gpointer addr, gpointer stack, MonoObject *exc)
 988 {
 989 #ifdef MONO_DEBUGGER_SUPPORTED
 990         MonoDebuggerThreadInfo *thread_info;
 991
 992         if (!mono_debug_using_mono_debugger ())
 993                 return FALSE;
 994
 995         if (exc) {
 996                 const gchar *name = mono_class_get_name (mono_object_get_class (exc));
 997                 if (!strcmp (name, "ThreadAbortException"))
 998                         return FALSE;
 999         }
1000
1001         mono_debugger_lock ();
1002
1003         thread_info = find_debugger_thread_info (mono_thread_internal_current ());
1004         if (!thread_info) {
1005                 mono_debugger_unlock ();
1006                 return FALSE;
1007         }
1008
1009         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED) != 0) {
1010                 mono_debugger_unlock ();
1011                 return FALSE;
1012         }
1013
1014         if (thread_info->exception_state.stopped_on_unhandled) {
1015                 thread_info->exception_state.stopped_on_unhandled = 0;
1016                 mono_debugger_unlock ();
1017                 return FALSE;
1018         }
1019
1020         thread_info->exception_state.stopped_on_unhandled = 1;
1021         thread_info->exception_state.last_exception = exc;
1022
1023         mono_debugger_event (MONO_DEBUGGER_EVENT_UNHANDLED_EXCEPTION,
1024                              (guint64) (gsize) exc, (guint64) (gsize) addr);
1025
1026         return TRUE;
1027 #else
1028         return FALSE;
1029 #endif
1030 }
1031
1032 /*
1033  * mono_debugger_call_exception_handler:
1034  *
1035  * Called from mono_handle_exception_internal() to tell the debugger that we're about
1036  * to invoke an exception handler.
1037  *
1038  * The debugger may choose to set a breakpoint at @addr.  This is used if the user is
1039  * single-stepping from a `try' into a `catch' block, for instance.
1040  */
1041
1042 void
1043 mono_debugger_call_exception_handler (gpointer addr, gpointer stack, MonoObject *exc)
1044 {
1045 #ifdef MONO_DEBUGGER_SUPPORTED
1046         MonoDebuggerThreadInfo *thread_info;
1047         MonoDebuggerExceptionInfo exc_info;
1048
1049         if (!mono_debug_using_mono_debugger ())
1050                 return;
1051
1052         mono_debugger_lock ();
1053
1054         thread_info = find_debugger_thread_info (mono_thread_internal_current ());
1055         if (!thread_info) {
1056                 mono_debugger_unlock ();
1057                 return;
1058         }
1059
1060         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED) != 0) {
1061                 mono_debugger_unlock ();
1062                 return;
1063         }
1064
1065         // Prevent the object from being finalized.
1066         thread_info->exception_state.last_exception = exc;
1067
1068         exc_info.stack_pointer = stack;
1069         exc_info.exception_obj = exc;
1070         exc_info.stop = 0;
1071         exc_info.stop_unhandled = 0;
1072
1073         mono_debugger_event (MONO_DEBUGGER_EVENT_HANDLE_EXCEPTION, (guint64) (gsize) &exc_info,
1074                              (guint64) (gsize) addr);
1075
1076         mono_debugger_unlock ();
1077 #endif
1078 }
1079
1080 #ifdef MONO_DEBUGGER_SUPPORTED
1081
1082 static gchar *
1083 get_exception_message (MonoObject *exc)
1084 {
1085         char *message = NULL;
1086         MonoString *str;
1087         MonoMethod *method;
1088         MonoClass *klass;
1089         gint i;
1090
1091         if (mono_object_isinst (exc, mono_defaults.exception_class)) {
1092                 klass = exc->vtable->klass;
1093                 method = NULL;
1094                 while (klass && method == NULL) {
1095                         for (i = 0; i < klass->method.count; ++i) {
1096                                 method = klass->methods [i];
1097                                 if (!strcmp ("ToString", method->name) &&
1098                                     mono_method_signature (method)->param_count == 0 &&
1099                                     method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
1100                                     method->flags & METHOD_ATTRIBUTE_PUBLIC) {
1101                                         break;
1102                                 }
1103                                 method = NULL;
1104                         }
1105
1106                         if (method == NULL)
1107                                 klass = klass->parent;
1108                 }
1109
1110                 g_assert (method);
1111
1112                 str = (MonoString *) mono_runtime_invoke (method, exc, NULL, NULL);
1113                 if (str)
1114                         message = mono_string_to_utf8 (str);
1115         }
1116
1117         return message;
1118 }
1119
1120 MonoObject *
1121 mono_debugger_runtime_invoke (MonoMethod *method, void *obj, void **params, MonoObject **exc)
1122 {
1123         MonoDebuggerThreadInfo *thread_info;
1124         MonoDebuggerExceptionState saved_exception_state;
1125         MonoObject *retval;
1126         gchar *message;
1127
1128         mono_debugger_lock ();
1129
1130         thread_info = find_debugger_thread_info (mono_thread_internal_current ());
1131         if (!thread_info) {
1132                 mono_debugger_unlock ();
1133                 return NULL;
1134         }
1135
1136         saved_exception_state = thread_info->exception_state;
1137
1138         thread_info->exception_state.last_exception = NULL;
1139         thread_info->exception_state.stopped_on_unhandled = 0;
1140         thread_info->exception_state.stopped_on_exception = 0;
1141
1142         thread_info->internal_flags |= MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_IN_RUNTIME_INVOKE;
1143
1144         mono_debugger_unlock ();
1145
1146         if (!strcmp (method->name, ".ctor")) {
1147                 retval = obj = mono_object_new (mono_domain_get (), method->klass);
1148
1149                 mono_runtime_invoke (method, obj, params, exc);
1150         } else
1151                 retval = mono_runtime_invoke (method, obj, params, exc);
1152
1153         mono_debugger_lock ();
1154
1155         thread_info->exception_state = saved_exception_state;
1156         thread_info->internal_flags &= ~MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_IN_RUNTIME_INVOKE;
1157
1158         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED) != 0) {
1159                 thread_info->internal_flags &= ~MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED;
1160                 mono_thread_internal_reset_abort (thread_info->thread);
1161
1162                 mono_debugger_unlock ();
1163
1164                 *exc = NULL;
1165                 return NULL;
1166         }
1167
1168         mono_debugger_unlock ();
1169
1170         if (!exc || (*exc == NULL))
1171                 return retval;
1172
1173         retval = *exc;
1174         message = get_exception_message (*exc);
1175         if (message) {
1176                 *exc = (MonoObject *) mono_string_new_wrapper (message);
1177                 g_free (message);
1178         }
1179
1180         return retval;
1181 }
1182
1183 gboolean
1184 mono_debugger_abort_runtime_invoke ()
1185 {
1186         MonoInternalThread *thread = mono_thread_internal_current ();
1187         MonoDebuggerThreadInfo *thread_info;
1188
1189         mono_debugger_lock ();
1190
1191         thread_info = find_debugger_thread_info (thread);
1192         if (!thread_info) {
1193                 mono_debugger_unlock ();
1194                 return FALSE;
1195         }
1196
1197         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_IN_RUNTIME_INVOKE) == 0) {
1198                 mono_debugger_unlock ();
1199                 return FALSE;
1200         }
1201
1202         if ((thread_info->internal_flags & MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED) != 0) {
1203                 mono_debugger_unlock ();
1204                 return TRUE;
1205         }
1206
1207         thread_info->internal_flags |= MONO_DEBUGGER_INTERNAL_THREAD_FLAGS_ABORT_REQUESTED;
1208         ves_icall_System_Threading_Thread_Abort (thread_info->thread, NULL);
1209
1210         mono_debugger_unlock ();
1211         return TRUE;
1212 }
1213
1214 #endif