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
28 #include "stackframe.h"
30 #include "wine/debug.h"
33 WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
36 static IMAGEHLP_STACK_FRAME* frames = NULL;
38 /***********************************************************************
41 * Dump the top of the stack
47 /* FIXME: we assume stack grows the same way as on i386 */
48 if (!memory_get_current_stack(&addr))
49 dbg_printf("Bad segment (%d)\n", addr.Segment);
51 dbg_printf("Stack dump:\n");
54 case AddrModeFlat: /* 32-bit mode */
55 case AddrMode1632: /* 32-bit mode */
56 memory_examine(memory_to_linear_addr(&addr), 24, 'x');
58 case AddrModeReal: /* 16-bit mode */
60 memory_examine(memory_to_linear_addr(&addr), 24, 'w');
65 int stack_set_frame(int newframe)
69 dbg_curr_frame = newframe;
70 if (dbg_curr_frame >= nframe) dbg_curr_frame = nframe - 1;
71 if (dbg_curr_frame < 0) dbg_curr_frame = 0;
73 addr.Mode = AddrModeFlat;
74 addr.Offset = frames[dbg_curr_frame].InstructionOffset;
75 source_list_from_addr(&addr, 0);
79 int stack_get_frame(SYMBOL_INFO* symbol, IMAGEHLP_STACK_FRAME* ihsf)
83 * If we don't have a valid backtrace, then just return.
85 if (frames == NULL) return FALSE;
88 * If we don't know what the current function is, then we also have
89 * nothing to report here.
91 if (!SymFromAddr(dbg_curr_process->handle, frames[dbg_curr_frame].InstructionOffset,
94 if (ihsf) *ihsf = frames[dbg_curr_frame];
99 void stack_backtrace(DWORD tid, BOOL noisy)
102 CONTEXT saved_dbg_context;
103 struct dbg_thread* thread;
106 if (tid == -1) /* backtrace every thread in every process except the debugger itself, invoking via "bt all" */
109 HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
111 if (snapshot == INVALID_HANDLE_VALUE)
113 dbg_printf("unable to create toolhelp snapshot\n");
117 entry.dwSize = sizeof(entry);
119 if (!Thread32First(snapshot, &entry))
121 CloseHandle(snapshot);
127 if (entry.th32OwnerProcessID == GetCurrentProcessId()) continue;
128 if (dbg_curr_process) dbg_detach_debuggee();
131 if (!dbg_attach_debuggee(entry.th32OwnerProcessID, FALSE, TRUE))
133 dbg_printf("\nwarning: could not attach to 0x%lx\n", entry.th32OwnerProcessID);
137 dbg_printf("Backtracing for thread 0x%lx in process 0x%lx (%s):\n", entry.th32ThreadID, dbg_curr_pid, dbg_curr_process->imageName);
139 stack_backtrace(entry.th32ThreadID, TRUE);
141 while (Thread32Next(snapshot, &entry));
143 if (dbg_curr_process) dbg_detach_debuggee();
144 CloseHandle(snapshot);
148 if (!dbg_curr_process)
150 dbg_printf("You must be attached to a process to run this command.\n");
154 saved_dbg_context = dbg_context; /* as we may modify dbg_context... */
155 if (tid == dbg_curr_tid)
157 thread = dbg_curr_thread;
158 HeapFree(GetProcessHeap(), 0, frames);
163 thread = dbg_get_thread(dbg_curr_process, tid);
166 dbg_printf("Unknown thread id (0x%08lx) in current process\n", tid);
169 memset(&dbg_context, 0, sizeof(dbg_context));
170 dbg_context.ContextFlags = CONTEXT_FULL;
171 if (SuspendThread(thread->handle) != -1)
173 if (!GetThreadContext(thread->handle, &dbg_context))
175 dbg_printf("Can't get context for thread 0x%lx in current process\n",
177 ResumeThread(thread->handle);
183 dbg_printf("Can't suspend thread 0x%lx in current process\n", tid);
189 memset(&sf, 0, sizeof(sf));
190 memory_get_current_frame(&sf.AddrFrame);
191 memory_get_current_pc(&sf.AddrPC);
193 /* don't confuse StackWalk by passing in inconsistent addresses */
194 if ((sf.AddrPC.Mode == AddrModeFlat) && (sf.AddrFrame.Mode != AddrModeFlat))
196 sf.AddrFrame.Offset = (DWORD)memory_to_linear_addr(&sf.AddrFrame);
197 sf.AddrFrame.Mode = AddrModeFlat;
200 if (noisy) dbg_printf("Backtrace:\n");
201 while (StackWalk(IMAGE_FILE_MACHINE_I386, dbg_curr_process->handle,
202 thread->handle, &sf, &dbg_context, NULL, SymFunctionTableAccess,
203 SymGetModuleBase, NULL))
205 if (tid == dbg_curr_tid)
207 frames = dbg_heap_realloc(frames,
208 (nf + 1) * sizeof(IMAGEHLP_STACK_FRAME));
210 frames[nf].InstructionOffset = (unsigned long)memory_to_linear_addr(&sf.AddrPC);
211 frames[nf].FrameOffset = (unsigned long)memory_to_linear_addr(&sf.AddrFrame);
216 (tid == dbg_curr_tid && nf == dbg_curr_frame ? "=>" : " "),
218 print_addr_and_args(&sf.AddrPC, &sf.AddrFrame);
220 print_bare_address(&sf.AddrFrame);
224 /* we've probably gotten ourselves into an infinite loop so bail */
229 dbg_context = saved_dbg_context;
230 if (tid == dbg_curr_tid)
236 ResumeThread(thread->handle);