2 * Debugger stack handling
4 * Copyright 1995 Alexandre Julliard
5 * Copyright 1996 Eric Youngdale
6 * Copyright 1999 Ove Kåven
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.
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.
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
30 #include "wine/winbase16.h"
31 #include "wine/debug.h"
34 WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
36 /***********************************************************************
39 * Dump the top of the stack
43 struct dbg_lvalue lvalue;
46 lvalue.type.id = dbg_itype_segptr;
47 lvalue.type.module = 0;
49 /* FIXME: we assume stack grows the same way as on i386 */
50 if (!memory_get_current_stack(&lvalue.addr))
51 dbg_printf("Bad segment (%d)\n", lvalue.addr.Segment);
53 dbg_printf("Stack dump:\n");
54 switch (lvalue.addr.Mode)
56 case AddrModeFlat: /* 32-bit mode */
57 case AddrMode1632: /* 32-bit mode */
58 memory_examine(&lvalue, 24, 'x');
60 case AddrModeReal: /* 16-bit mode */
62 memory_examine(&lvalue, 24, 'w');
67 static BOOL stack_set_frame_internal(int newframe)
69 if (newframe >= dbg_curr_thread->num_frames)
70 newframe = dbg_curr_thread->num_frames - 1;
74 if (dbg_curr_thread->curr_frame != newframe)
76 IMAGEHLP_STACK_FRAME ihsf;
78 dbg_curr_thread->curr_frame = newframe;
79 stack_get_current_frame(&ihsf);
80 SymSetContext(dbg_curr_process->handle, &ihsf, NULL);
85 static BOOL stack_get_frame(int nf, IMAGEHLP_STACK_FRAME* ihsf)
87 memset(ihsf, 0, sizeof(*ihsf));
88 ihsf->InstructionOffset = (unsigned long)memory_to_linear_addr(&dbg_curr_thread->frames[nf].addr_pc);
89 ihsf->FrameOffset = (unsigned long)memory_to_linear_addr(&dbg_curr_thread->frames[nf].addr_frame);
93 BOOL stack_get_current_frame(IMAGEHLP_STACK_FRAME* ihsf)
96 * If we don't have a valid backtrace, then just return.
98 if (dbg_curr_thread->frames == NULL) return FALSE;
99 return stack_get_frame(dbg_curr_thread->curr_frame, ihsf);
102 BOOL stack_set_frame(int newframe)
105 if (!stack_set_frame_internal(newframe)) return FALSE;
106 addr.Mode = AddrModeFlat;
107 addr.Offset = (unsigned long)memory_to_linear_addr(&dbg_curr_thread->frames[dbg_curr_thread->curr_frame].addr_pc);
108 source_list_from_addr(&addr, 0);
112 /******************************************************************
113 * stack_get_current_symbol
115 * Retrieves the symbol information for the current frame element
117 BOOL stack_get_current_symbol(SYMBOL_INFO* symbol)
119 IMAGEHLP_STACK_FRAME ihsf;
122 if (!stack_get_current_frame(&ihsf)) return FALSE;
123 return SymFromAddr(dbg_curr_process->handle, ihsf.InstructionOffset,
127 static BOOL CALLBACK stack_read_mem(HANDLE hProc, DWORD addr,
128 PVOID buffer, DWORD size, PDWORD written)
130 struct dbg_process* pcs = dbg_get_process_h(hProc);
131 if (!pcs) return FALSE;
132 return pcs->process_io->read(hProc, (const void*)addr, buffer, size, written);
135 /******************************************************************
138 * Do a backtrace on the the current thread
140 unsigned stack_fetch_frames(void)
145 HeapFree(GetProcessHeap(), 0, dbg_curr_thread->frames);
146 dbg_curr_thread->frames = NULL;
148 memset(&sf, 0, sizeof(sf));
149 memory_get_current_frame(&sf.AddrFrame);
150 memory_get_current_pc(&sf.AddrPC);
152 /* don't confuse StackWalk by passing in inconsistent addresses */
153 if ((sf.AddrPC.Mode == AddrModeFlat) && (sf.AddrFrame.Mode != AddrModeFlat))
155 sf.AddrFrame.Offset = (DWORD)memory_to_linear_addr(&sf.AddrFrame);
156 sf.AddrFrame.Mode = AddrModeFlat;
159 while (StackWalk(IMAGE_FILE_MACHINE_I386, dbg_curr_process->handle,
160 dbg_curr_thread->handle, &sf, &dbg_context, stack_read_mem,
161 SymFunctionTableAccess, SymGetModuleBase, NULL))
163 dbg_curr_thread->frames = dbg_heap_realloc(dbg_curr_thread->frames,
164 (nf + 1) * sizeof(dbg_curr_thread->frames[0]));
166 dbg_curr_thread->frames[nf].addr_pc = sf.AddrPC;
167 dbg_curr_thread->frames[nf].addr_frame = sf.AddrFrame;
169 /* we've probably gotten ourselves into an infinite loop so bail */
172 dbg_curr_thread->curr_frame = -1;
173 dbg_curr_thread->num_frames = nf;
174 stack_set_frame_internal(0);
184 static BOOL WINAPI sym_enum_cb(SYMBOL_INFO* sym_info, ULONG size, void* user)
186 struct sym_enum* se = (struct sym_enum*)user;
189 if (sym_info->Flags & SYMFLAG_PARAMETER)
191 if (se->tmp[0]) strcat(se->tmp, ", ");
193 if (sym_info->Flags & SYMFLAG_REGREL)
196 DWORD addr = se->frame + sym_info->Address;
198 if (!dbg_read_memory((char*)addr, &val, sizeof(val)))
199 snprintf(tmp, sizeof(tmp), "<*** cannot read at 0x%lx ***>", addr);
201 snprintf(tmp, sizeof(tmp), "0x%x", val);
203 else if (sym_info->Flags & SYMFLAG_REGISTER)
207 if (memory_get_register(sym_info->Register, &pval, tmp, sizeof(tmp)))
208 snprintf(tmp, sizeof(tmp), "0x%lx", *pval);
210 sprintf(se->tmp + strlen(se->tmp), "%s=%s", sym_info->Name, tmp);
215 static void stack_print_addr_and_args(int nf)
217 char buffer[sizeof(SYMBOL_INFO) + 256];
218 SYMBOL_INFO* si = (SYMBOL_INFO*)buffer;
219 IMAGEHLP_STACK_FRAME ihsf;
224 print_bare_address(&dbg_curr_thread->frames[nf].addr_pc);
226 stack_get_frame(nf, &ihsf);
228 /* grab module where symbol is. If we don't have a module, we cannot print more */
229 im.SizeOfStruct = sizeof(im);
230 if (!SymGetModuleInfo(dbg_curr_process->handle, ihsf.InstructionOffset, &im))
233 si->SizeOfStruct = sizeof(*si);
234 si->MaxNameLen = 256;
235 if (SymFromAddr(dbg_curr_process->handle, ihsf.InstructionOffset, &disp64, si))
241 dbg_printf(" %s", si->Name);
242 if (disp64) dbg_printf("+0x%lx", (DWORD_PTR)disp64);
244 SymSetContext(dbg_curr_process->handle, &ihsf, NULL);
246 se.frame = ihsf.FrameOffset;
248 SymEnumSymbols(dbg_curr_process->handle, 0, NULL, sym_enum_cb, &se);
249 if (tmp[0]) dbg_printf("(%s)", tmp);
251 il.SizeOfStruct = sizeof(il);
252 if (SymGetLineFromAddr(dbg_curr_process->handle, ihsf.InstructionOffset,
254 dbg_printf(" [%s:%lu]", il.FileName, il.LineNumber);
255 dbg_printf(" in %s", im.ModuleName);
257 else dbg_printf(" in %s (+0x%lx)",
258 im.ModuleName, (DWORD_PTR)(ihsf.InstructionOffset - im.BaseOfImage));
261 /******************************************************************
264 * Do a backtrace on the the current thread
266 static void backtrace(void)
268 unsigned cf = dbg_curr_thread->curr_frame;
269 IMAGEHLP_STACK_FRAME ihsf;
271 dbg_printf("Backtrace:\n");
272 for (dbg_curr_thread->curr_frame = 0;
273 dbg_curr_thread->curr_frame < dbg_curr_thread->num_frames;
274 dbg_curr_thread->curr_frame++)
277 (cf == dbg_curr_thread->curr_frame ? "=>" : " "),
278 dbg_curr_thread->curr_frame + 1);
279 stack_print_addr_and_args(dbg_curr_thread->curr_frame);
281 print_bare_address(&dbg_curr_thread->frames[dbg_curr_thread->curr_frame].addr_pc);
284 /* reset context to current stack frame */
285 dbg_curr_thread->curr_frame = cf;
286 stack_get_frame(dbg_curr_thread->curr_frame, &ihsf);
287 SymSetContext(dbg_curr_process->handle, &ihsf, NULL);
290 /******************************************************************
293 * Do a backtrace on a thread from its process and its identifier
294 * (preserves current thread and context information)
296 static void backtrace_tid(struct dbg_process* pcs, DWORD tid)
298 struct dbg_thread* thread = dbg_curr_thread;
300 if (!(dbg_curr_thread = dbg_get_thread(pcs, tid)))
301 dbg_printf("Unknown thread id (0x%lx) in process (0x%lx)\n", tid, pcs->pid);
304 CONTEXT saved_ctx = dbg_context;
306 dbg_curr_tid = dbg_curr_thread->tid;
307 memset(&dbg_context, 0, sizeof(dbg_context));
308 dbg_context.ContextFlags = CONTEXT_FULL;
309 if (SuspendThread(dbg_curr_thread->handle) != -1)
311 if (!GetThreadContext(dbg_curr_thread->handle, &dbg_context))
313 dbg_printf("Can't get context for thread 0x%lx in current process\n",
317 ResumeThread(dbg_curr_thread->handle);
319 else dbg_printf("Can't suspend thread 0x%lx in current process\n", tid);
320 dbg_context = saved_ctx;
322 dbg_curr_thread = thread;
323 dbg_curr_tid = thread ? thread->tid : 0;
326 /******************************************************************
329 * Do a backtrace on every running thread in the system (except the debugger)
330 * (preserves current process information)
332 static void backtrace_all(void)
335 HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
337 if (snapshot == INVALID_HANDLE_VALUE)
339 dbg_printf("Unable to create toolhelp snapshot\n");
343 entry.dwSize = sizeof(entry);
344 if (Thread32First(snapshot, &entry))
348 if (entry.th32OwnerProcessID == GetCurrentProcessId()) continue;
349 if (dbg_curr_process && dbg_curr_pid != entry.th32OwnerProcessID)
350 dbg_curr_process->process_io->close_process(dbg_curr_process, FALSE);
352 if (entry.th32OwnerProcessID != dbg_curr_pid)
354 if (!dbg_attach_debuggee(entry.th32OwnerProcessID, FALSE, TRUE))
356 dbg_printf("\nwarning: could not attach to 0x%lx\n",
357 entry.th32OwnerProcessID);
360 dbg_curr_pid = dbg_curr_process->pid;
363 dbg_printf("\nBacktracing for thread 0x%lx in process 0x%lx (%s):\n",
364 entry.th32ThreadID, dbg_curr_pid, dbg_curr_process->imageName);
365 backtrace_tid(dbg_curr_process, entry.th32ThreadID);
367 while (Thread32Next(snapshot, &entry));
369 if (dbg_curr_process)
370 dbg_curr_process->process_io->close_process(dbg_curr_process, FALSE);
372 CloseHandle(snapshot);
375 void stack_backtrace(DWORD tid)
377 /* backtrace every thread in every process except the debugger itself,
378 * invoking via "bt all"
380 if (tid == -1) return backtrace_all();
382 if (!dbg_curr_process)
384 dbg_printf("You must be attached to a process to run this command.\n");
388 if (tid == dbg_curr_tid)
394 backtrace_tid(dbg_curr_process, tid);