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Fix primary buffer memory leak.
[wine/multimedia.git] / programs / winedbg / memory.c
blobc338f9d64470e9371ad7933f256582769faf1cf0
1 /*
2 * Debugger memory handling
3 *
4 * Copyright 1993 Eric Youngdale
5 * Copyright 1995 Alexandre Julliard
6 * Copyright 2000-2004 Eric Pouech
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #include "config.h"
24 #include "wine/port.h"
25
26 #include <stdlib.h>
27 #include <string.h>
28 #include <stdio.h>
29
30 #include "debugger.h"
31 #include "wine/debug.h"
32
33 WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
34
35 void* be_cpu_linearize(HANDLE hThread, const ADDRESS* addr)
36 {
37 assert(addr->Mode == AddrModeFlat);
38 return (void*)addr->Offset;
39 }
40
41 unsigned be_cpu_build_addr(HANDLE hThread, const CONTEXT* ctx, ADDRESS* addr,
42 unsigned seg, unsigned long offset)
43 {
44 addr->Mode = AddrModeFlat;
45 addr->Segment = 0; /* don't need segment */
46 addr->Offset = offset;
47 return TRUE;
48 }
49
50 void* memory_to_linear_addr(const ADDRESS* addr)
51 {
52 return be_cpu->linearize(dbg_curr_thread->handle, addr);
53 }
54
55 BOOL memory_get_current_pc(ADDRESS* addr)
56 {
57 assert(be_cpu->get_addr);
58 return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
59 be_cpu_addr_pc, addr);
60 }
61
62 BOOL memory_get_current_stack(ADDRESS* addr)
63 {
64 assert(be_cpu->get_addr);
65 return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
66 be_cpu_addr_stack, addr);
67 }
68
69 BOOL memory_get_current_frame(ADDRESS* addr)
70 {
71 assert(be_cpu->get_addr);
72 return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
73 be_cpu_addr_frame, addr);
74 }
75
76 void memory_report_invalid_addr(const void* addr)
77 {
78 ADDRESS address;
79
80 address.Mode = AddrModeFlat;
81 address.Segment = 0;
82 address.Offset = (unsigned long)addr;
83 dbg_printf("*** Invalid address ");
84 print_address(&address, FALSE);
85 dbg_printf("\n");
86 }
87
88 /***********************************************************************
89 * memory_read_value
90 *
91 * Read a memory value.
92 */
93 BOOL memory_read_value(const struct dbg_lvalue* lvalue, DWORD size, void* result)
94 {
95 if (lvalue->cookie == DLV_TARGET)
96 {
97 if (!dbg_read_memory_verbose(memory_to_linear_addr(&lvalue->addr), result, size))
98 return FALSE;
99 }
100 else
101 {
102 if (!lvalue->addr.Offset) return FALSE;
103 memcpy(result, (void*)lvalue->addr.Offset, size);
104 }
105 return TRUE;
106 }
107
108 /***********************************************************************
109 * memory_write_value
110 *
111 * Store a value in memory.
112 */
113 BOOL memory_write_value(const struct dbg_lvalue* lvalue, DWORD size, void* value)
114 {
115 BOOL ret = TRUE;
116 DWORD os;
117 DWORD linear = (DWORD)memory_to_linear_addr(&lvalue->addr);
118
119 os = ~size;
120 types_get_info(&lvalue->type, TI_GET_LENGTH, &os);
121 assert(size == os);
122
123 /* FIXME: only works on little endian systems */
124 if (lvalue->cookie == DLV_TARGET)
125 {
126 ret = dbg_write_memory_verbose((void*)linear, value, size);
127 }
128 else
129 {
130 memcpy((void*)lvalue->addr.Offset, value, size);
131 }
132 return ret;
133 }
134
135 /***********************************************************************
136 * memory_examine
137 *
138 * Implementation of the 'x' command.
139 */
140 void memory_examine(void* linear, int count, char format)
141 {
142 int i;
143 char buffer[256];
144 ADDRESS addr;
145
146 addr.Mode = AddrModeFlat;
147 addr.Offset = (unsigned long)linear;
148
149 if (format != 'i' && count > 1)
150 {
151 print_address(&addr, FALSE);
152 dbg_printf(": ");
153 }
154
155 switch (format)
156 {
157 case 'u':
158 if (count == 1) count = 256;
159 memory_get_string(dbg_curr_process->handle, linear,
160 TRUE, TRUE, buffer, min(count, sizeof(buffer)));
161 dbg_printf("%s\n", buffer);
162 return;
163 case 's':
164 if (count == 1) count = 256;
165 memory_get_string(dbg_curr_process->handle, linear,
166 TRUE, FALSE, buffer, min(count, sizeof(buffer)));
167 dbg_printf("%s\n", buffer);
168 return;
169 case 'i':
170 while (count-- && memory_disasm_one_insn(&addr));
171 return;
172 case 'g':
173 while (count--)
174 {
175 GUID guid;
176 if (!dbg_read_memory_verbose(linear, &guid, sizeof(guid))) break;
177 dbg_printf("{%08lx-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}\n",
178 guid.Data1, guid.Data2, guid.Data3,
179 guid.Data4[0], guid.Data4[1], guid.Data4[2], guid.Data4[3],
180 guid.Data4[4], guid.Data4[5], guid.Data4[6], guid.Data4[7]);
181 linear = (char*)linear + sizeof(guid);
182 addr.Offset += sizeof(guid);
183 if (count)
184 {
185 print_address(&addr, FALSE);
186 dbg_printf(": ");
187 }
188 }
189 return;
190
191 #define DO_DUMP2(_t,_l,_f,_vv) { \
192 _t _v; \
193 for (i = 0; i < count; i++) { \
194 if (!dbg_read_memory_verbose(linear, &_v, \
195 sizeof(_t))) break; \
196 dbg_printf(_f, (_vv)); \
197 addr.Offset += sizeof(_t); \
198 linear = (char*)linear + sizeof(_t); \
199 if ((i % (_l)) == (_l) - 1 && i != count - 1) \
200 { \
201 dbg_printf("\n"); \
202 print_address(&addr, FALSE); \
203 dbg_printf(": "); \
204 } \
205 } \
206 dbg_printf("\n"); \
207 } \
208 return
209 #define DO_DUMP(_t,_l,_f) DO_DUMP2(_t,_l,_f,_v)
210
211 case 'x': DO_DUMP(int, 4, " %8.8x");
212 case 'd': DO_DUMP(unsigned int, 4, " %10d");
213 case 'w': DO_DUMP(unsigned short, 8, " %04x");
214 case 'c': DO_DUMP2(char, 32, " %c", (_v < 0x20) ? ' ' : _v);
215 case 'b': DO_DUMP2(char, 16, " %02x", (_v) & 0xff);
216 }
217 }
218
219 BOOL memory_get_string(HANDLE hp, void* addr, BOOL in_debuggee, BOOL unicode,
220 char* buffer, int size)
221 {
222 DWORD sz;
223 WCHAR* buffW;
224
225 buffer[0] = 0;
226 if (!addr) return FALSE;
227 if (in_debuggee)
228 {
229 if (!unicode) return ReadProcessMemory(hp, addr, buffer, size, &sz);
230
231 buffW = HeapAlloc(GetProcessHeap(), 0, size * sizeof(WCHAR));
232 ReadProcessMemory(hp, addr, buffW, size * sizeof(WCHAR), &sz);
233 WideCharToMultiByte(CP_ACP, 0, buffW, sz / sizeof(WCHAR), buffer, size,
234 NULL, NULL);
235 HeapFree(GetProcessHeap(), 0, buffW);
236 }
237 else
238 {
239 strncpy(buffer, addr, size);
240 buffer[size - 1] = 0;
241 }
242 return TRUE;
243 }
244
245 BOOL memory_get_string_indirect(HANDLE hp, void* addr, BOOL unicode, char* buffer, int size)
246 {
247 void* ad;
248 DWORD sz;
249
250 buffer[0] = 0;
251 if (addr &&
252 ReadProcessMemory(hp, addr, &ad, sizeof(ad), &sz) && sz == sizeof(ad) && ad)
253 {
254 return memory_get_string(hp, ad, TRUE, unicode, buffer, size);
255 }
256 return FALSE;
257 }
258
259 static void print_typed_basic(const struct dbg_lvalue* lvalue)
260 {
261 long long int val_int;
262 void* val_ptr;
263 long double val_real;
264 DWORD tag, size, count, bt;
265 struct dbg_type rtype;
266
267 if (lvalue->type.id == dbg_itype_none ||
268 !types_get_info(&lvalue->type, TI_GET_SYMTAG, &tag))
269 return;
270
271 switch (tag)
272 {
273 case SymTagBaseType:
274 if (!types_get_info(&lvalue->type, TI_GET_LENGTH, &size) ||
275 !types_get_info(&lvalue->type, TI_GET_BASETYPE, &bt))
276 {
277 WINE_ERR("Couldn't get information\n");
278 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
279 }
280
281 switch (bt)
282 {
283 case btInt:
284 if (!be_cpu->fetch_integer(lvalue, size, TRUE, &val_int)) return;
285 dbg_printf("%lld", val_int);
286 break;
287 case btUInt:
288 if (!be_cpu->fetch_integer(lvalue, size, FALSE, &val_int)) return;
289 dbg_printf("%llu", val_int);
290 break;
291 case btFloat:
292 if (!be_cpu->fetch_float(lvalue, size, &val_real)) return;
293 dbg_printf("%Lf", val_real);
294 break;
295 case btChar:
296 if (!be_cpu->fetch_integer(lvalue, size, TRUE, &val_int)) return;
297 /* FIXME: should do the same for a Unicode character (size == 2) */
298 if (size == 1 && (val_int < 0x20 || val_int > 0x80))
299 dbg_printf("%d", (int)val_int);
300 else
301 dbg_printf("'%c'", (char)val_int);
302 break;
303 default:
304 WINE_FIXME("Unsupported basetype %lu\n", bt);
305 break;
306 }
307 break;
308 case SymTagPointerType:
309 if (!memory_read_value(lvalue, sizeof(void*), &val_ptr)) return;
310
311 if (!types_get_info(&lvalue->type, TI_GET_TYPE, &rtype.id) ||
312 rtype.id == dbg_itype_none)
313 {
314 dbg_printf("Internal symbol error: unable to access memory location %p", val_ptr);
315 break;
316 }
317 rtype.module = lvalue->type.module;
318 if (types_get_info(&rtype, TI_GET_SYMTAG, &tag) && tag == SymTagBaseType &&
319 types_get_info(&rtype, TI_GET_BASETYPE, &bt) && bt == btChar &&
320 types_get_info(&rtype, TI_GET_LENGTH, &size))
321 {
322 char buffer[1024];
323
324 memory_get_string(dbg_curr_process->handle, val_ptr,
325 lvalue->cookie == DLV_TARGET,
326 size == 2, buffer, sizeof(buffer));
327 dbg_printf("\"%s\"", buffer);
328 }
329 else dbg_printf("%p", val_ptr);
330 break;
331 case SymTagArrayType:
332 case SymTagUDT:
333 assert(lvalue->cookie == DLV_TARGET);
334 if (!memory_read_value(lvalue, sizeof(val_ptr), &val_ptr)) return;
335 dbg_printf("%p", val_ptr);
336 break;
337 case SymTagEnum:
338 {
339 BOOL ok = FALSE;
340
341 assert(lvalue->cookie == DLV_TARGET);
342 /* FIXME: it depends on underlying type for enums
343 * (not supported yet in dbghelp)
344 * Assuming 4 as for an int
345 */
346 if (!be_cpu->fetch_integer(lvalue, 4, TRUE, &val_int)) return;
347
348 if (types_get_info(&lvalue->type, TI_GET_CHILDRENCOUNT, &count))
349 {
350 char buffer[sizeof(TI_FINDCHILDREN_PARAMS) + 256 * sizeof(DWORD)];
351 TI_FINDCHILDREN_PARAMS* fcp = (TI_FINDCHILDREN_PARAMS*)buffer;
352 WCHAR* ptr;
353 char tmp[256];
354 VARIANT variant;
355 int i;
356 struct dbg_type type;
357
358 fcp->Start = 0;
359 while (count)
360 {
361 fcp->Count = min(count, 256);
362 if (types_get_info(&lvalue->type, TI_FINDCHILDREN, fcp))
363 {
364 type.module = lvalue->type.module;
365 for (i = 0; i < min(fcp->Count, count); i++)
366 {
367 type.id = fcp->ChildId[i];
368 if (!types_get_info(&type, TI_GET_VALUE, &variant))
369 continue;
370 switch (variant.n1.n2.vt)
371 {
372 case VT_I4: ok = (val_int == variant.n1.n2.n3.lVal); break;
373 default: WINE_FIXME("Unsupported variant type (%u)\n", variant.n1.n2.vt);
374 }
375 if (ok)
376 {
377 ptr = NULL;
378 types_get_info(&type, TI_GET_SYMNAME, &ptr);
379 if (!ptr) continue;
380 WideCharToMultiByte(CP_ACP, 0, ptr, -1, tmp, sizeof(tmp), NULL, NULL);
381 HeapFree(GetProcessHeap(), 0, ptr);
382 dbg_printf("%s", tmp);
383 count = 0; /* so that we'll get away from outter loop */
384 break;
385 }
386 }
387 }
388 }
389 count -= min(count, 256);
390 fcp->Start += 256;
391 }
392 if (!ok) dbg_printf("%lld", val_int);
393 }
394 break;
395 default:
396 WINE_FIXME("Unsupported tag %lu\n", tag);
397 break;
398 }
399 }
400
401 /***********************************************************************
402 * print_basic
403 *
404 * Implementation of the 'print' command.
405 */
406 void print_basic(const struct dbg_lvalue* lvalue, int count, char format)
407 {
408 long int res;
409
410 if (lvalue->type.id == dbg_itype_none)
411 {
412 dbg_printf("Unable to evaluate expression\n");
413 return;
414 }
415
416 res = types_extract_as_integer(lvalue);
417
418 /* FIXME: this implies i386 byte ordering */
419 switch (format)
420 {
421 case 'x':
422 if (lvalue->addr.Mode != AddrModeFlat)
423 dbg_printf("0x%04lx", res);
424 else
425 dbg_printf("0x%08lx", res);
426 break;
427
428 case 'd':
429 dbg_printf("%ld\n", res);
430 break;
431
432 case 'c':
433 dbg_printf("%d = '%c'", (char)(res & 0xff), (char)(res & 0xff));
434 break;
435
436 case 'u':
437 {
438 WCHAR wch = (WCHAR)(res & 0xFFFF);
439 dbg_printf("%d = '", wch);
440 dbg_outputW(&wch, 1);
441 dbg_printf("'");
442 }
443 break;
444
445 case 'i':
446 case 's':
447 case 'w':
448 case 'b':
449 dbg_printf("Format specifier '%c' is meaningless in 'print' command\n", format);
450 case 0:
451 print_typed_basic(lvalue);
452 break;
453 }
454 }
455
456 void print_bare_address(const ADDRESS* addr)
457 {
458 switch (addr->Mode)
459 {
460 case AddrModeFlat:
461 dbg_printf("0x%08lx", addr->Offset);
462 break;
463 case AddrModeReal:
464 case AddrMode1616:
465 dbg_printf("0x%04x:0x%04lx", addr->Segment, addr->Offset);
466 break;
467 case AddrMode1632:
468 dbg_printf("0x%04x:0x%08lx", addr->Segment, addr->Offset);
469 break;
470 default:
471 dbg_printf("Unknown mode %x\n", addr->Mode);
472 break;
473 }
474 }
475
476 /***********************************************************************
477 * print_address
478 *
479 * Print an 16- or 32-bit address, with the nearest symbol if any.
480 */
481 void print_address(const ADDRESS* addr, BOOLEAN with_line)
482 {
483 char buffer[sizeof(SYMBOL_INFO) + 256];
484 SYMBOL_INFO* si = (SYMBOL_INFO*)buffer;
485 void* lin = memory_to_linear_addr(addr);
486 DWORD64 disp64;
487 DWORD disp;
488
489 print_bare_address(addr);
490
491 si->SizeOfStruct = sizeof(*si);
492 si->MaxNameLen = 256;
493 if (!SymFromAddr(dbg_curr_process->handle, (DWORD_PTR)lin, &disp64, si)) return;
494 dbg_printf(" %s", si->Name);
495 if (disp64) dbg_printf("+0x%lx", (DWORD_PTR)disp64);
496 if (with_line)
497 {
498 IMAGEHLP_LINE il;
499 IMAGEHLP_MODULE im;
500
501 il.SizeOfStruct = sizeof(il);
502 if (SymGetLineFromAddr(dbg_curr_process->handle, (DWORD_PTR)lin, &disp, &il))
503 dbg_printf(" [%s:%lu]", il.FileName, il.LineNumber);
504 im.SizeOfStruct = sizeof(im);
505 if (SymGetModuleInfo(dbg_curr_process->handle, (DWORD_PTR)lin, &im))
506 dbg_printf(" in %s", im.ModuleName);
507 }
508 }
509
510 struct sym_enum
511 {
512 char* tmp;
513 DWORD frame;
514 };
515
516 static BOOL WINAPI sym_enum_cb(SYMBOL_INFO* sym_info, ULONG size, void* user)
517 {
518 struct sym_enum* se = (struct sym_enum*)user;
519 DWORD addr;
520 unsigned val;
521 long offset;
522
523 if ((sym_info->Flags & (SYMFLAG_PARAMETER|SYMFLAG_FRAMEREL)) == (SYMFLAG_PARAMETER|SYMFLAG_FRAMEREL))
524 {
525 struct dbg_type type;
526
527 if (se->tmp[0]) strcat(se->tmp, ", ");
528 addr = se->frame;
529 type.module = sym_info->ModBase;
530 type.id = sym_info->TypeIndex;
531 types_get_info(&type, TI_GET_OFFSET, &offset);
532 addr += offset;
533 dbg_read_memory_verbose((char*)addr, &val, sizeof(val));
534 sprintf(se->tmp + strlen(se->tmp), "%s=0x%x", sym_info->Name, val);
535 }
536 return TRUE;
537 }
538
539 void print_addr_and_args(const ADDRESS* pc, const ADDRESS* frame)
540 {
541 char buffer[sizeof(SYMBOL_INFO) + 256];
542 SYMBOL_INFO* si = (SYMBOL_INFO*)buffer;
543 IMAGEHLP_STACK_FRAME isf;
544 IMAGEHLP_LINE il;
545 IMAGEHLP_MODULE im;
546 DWORD64 disp64;
547
548 print_bare_address(pc);
549
550 isf.InstructionOffset = (DWORD_PTR)memory_to_linear_addr(pc);
551 isf.FrameOffset = (DWORD_PTR)memory_to_linear_addr(frame);
552
553 /* grab module where symbol is. If we don't have a module, we cannot print more */
554 im.SizeOfStruct = sizeof(im);
555 if (!SymGetModuleInfo(dbg_curr_process->handle, isf.InstructionOffset, &im))
556 return;
557
558 si->SizeOfStruct = sizeof(*si);
559 si->MaxNameLen = 256;
560 if (SymFromAddr(dbg_curr_process->handle, isf.InstructionOffset, &disp64, si))
561 {
562 struct sym_enum se;
563 char tmp[1024];
564 DWORD disp;
565
566 dbg_printf(" %s", si->Name);
567 if (disp) dbg_printf("+0x%lx", (DWORD_PTR)disp64);
568
569 SymSetContext(dbg_curr_process->handle, &isf, NULL);
570 se.tmp = tmp;
571 se.frame = isf.FrameOffset;
572 tmp[0] = '\0';
573 SymEnumSymbols(dbg_curr_process->handle, 0, NULL, sym_enum_cb, &se);
574 if (tmp[0]) dbg_printf("(%s)", tmp);
575
576 il.SizeOfStruct = sizeof(il);
577 if (SymGetLineFromAddr(dbg_curr_process->handle, isf.InstructionOffset,
578 &disp, &il))
579 dbg_printf(" [%s:%lu]", il.FileName, il.LineNumber);
580 dbg_printf(" in %s", im.ModuleName);
581 }
582 else dbg_printf(" in %s (+0x%lx)",
583 im.ModuleName, (DWORD_PTR)(isf.InstructionOffset - im.BaseOfImage));
584 }
585
586 BOOL memory_disasm_one_insn(ADDRESS* addr)
587 {
588 char ch;
589
590 print_address(addr, TRUE);
591 dbg_printf(": ");
592 if (!dbg_read_memory(memory_to_linear_addr(addr), &ch, sizeof(ch)))
593 {
594 dbg_printf("-- no code accessible --\n");
595 return FALSE;
596 }
597 be_cpu->disasm_one_insn(addr, TRUE);
598 dbg_printf("\n");
599 return TRUE;
600 }
601
602 void memory_disassemble(const struct dbg_lvalue* xstart,
603 const struct dbg_lvalue* xend, int instruction_count)
604 {
605 static ADDRESS last = {0,0,0};
606 int stop = 0;
607 int i;
608
609 if (!xstart && !xend)
610 {
611 if (!last.Segment && !last.Offset) memory_get_current_pc(&last);
612 }
613 else
614 {
615 if (xstart)
616 {
617 last.Mode = AddrModeFlat;
618 last.Offset = types_extract_as_integer(xstart);
619 }
620 if (xend)
621 stop = types_extract_as_integer(xend);
622 }
623 for (i = 0; (instruction_count == 0 || i < instruction_count) &&
624 (stop == 0 || last.Offset <= stop); i++)
625 memory_disasm_one_insn(&last);
626 }
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