/* * Debugger stack handling * * Copyright 1995 Alexandre Julliard * Copyright 1996 Eric Youngdale * Copyright 1999 Ove Kåven * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "config.h" #include #include "debugger.h" #include "stackframe.h" #include "winbase.h" #include "wine/debug.h" #include "tlhelp32.h" WINE_DEFAULT_DEBUG_CHANNEL(winedbg); static int nframe; static IMAGEHLP_STACK_FRAME* frames = NULL; /*********************************************************************** * stack_info * * Dump the top of the stack */ void stack_info(void) { struct dbg_lvalue lvalue; lvalue.cookie = 0; lvalue.type.id = dbg_itype_none; lvalue.type.module = 0; /* FIXME: we assume stack grows the same way as on i386 */ if (!memory_get_current_stack(&lvalue.addr)) dbg_printf("Bad segment (%d)\n", lvalue.addr.Segment); dbg_printf("Stack dump:\n"); switch (lvalue.addr.Mode) { case AddrModeFlat: /* 32-bit mode */ case AddrMode1632: /* 32-bit mode */ memory_examine(&lvalue, 24, 'x'); break; case AddrModeReal: /* 16-bit mode */ case AddrMode1616: memory_examine(&lvalue, 24, 'w'); break; } } int stack_set_frame(int newframe) { ADDRESS addr; dbg_curr_frame = newframe; if (dbg_curr_frame >= nframe) dbg_curr_frame = nframe - 1; if (dbg_curr_frame < 0) dbg_curr_frame = 0; addr.Mode = AddrModeFlat; addr.Offset = frames[dbg_curr_frame].InstructionOffset; source_list_from_addr(&addr, 0); return TRUE; } int stack_get_frame(SYMBOL_INFO* symbol, IMAGEHLP_STACK_FRAME* ihsf) { DWORD64 disp; /* * If we don't have a valid backtrace, then just return. */ if (frames == NULL) return FALSE; /* * If we don't know what the current function is, then we also have * nothing to report here. */ if (!SymFromAddr(dbg_curr_process->handle, frames[dbg_curr_frame].InstructionOffset, &disp, symbol)) return FALSE; if (ihsf) *ihsf = frames[dbg_curr_frame]; return TRUE; } void stack_backtrace(DWORD tid, BOOL noisy) { STACKFRAME sf; CONTEXT saved_dbg_context; struct dbg_thread* thread; unsigned nf; if (tid == -1) /* backtrace every thread in every process except the debugger itself, invoking via "bt all" */ { THREADENTRY32 entry; HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0); if (snapshot == INVALID_HANDLE_VALUE) { dbg_printf("unable to create toolhelp snapshot\n"); return; } entry.dwSize = sizeof(entry); if (!Thread32First(snapshot, &entry)) { CloseHandle(snapshot); return; } do { if (entry.th32OwnerProcessID == GetCurrentProcessId()) continue; if (dbg_curr_process) dbg_detach_debuggee(); dbg_printf("\n"); if (!dbg_attach_debuggee(entry.th32OwnerProcessID, FALSE, TRUE)) { dbg_printf("\nwarning: could not attach to 0x%lx\n", entry.th32OwnerProcessID); continue; } dbg_printf("Backtracing for thread 0x%lx in process 0x%lx (%s):\n", entry.th32ThreadID, dbg_curr_pid, dbg_curr_process->imageName); stack_backtrace(entry.th32ThreadID, TRUE); } while (Thread32Next(snapshot, &entry)); if (dbg_curr_process) dbg_detach_debuggee(); CloseHandle(snapshot); return; } if (!dbg_curr_process) { dbg_printf("You must be attached to a process to run this command.\n"); return; } saved_dbg_context = dbg_context; /* as we may modify dbg_context... */ if (tid == dbg_curr_tid) { thread = dbg_curr_thread; HeapFree(GetProcessHeap(), 0, frames); frames = NULL; } else { thread = dbg_get_thread(dbg_curr_process, tid); if (!thread) { dbg_printf("Unknown thread id (0x%08lx) in current process\n", tid); return; } memset(&dbg_context, 0, sizeof(dbg_context)); dbg_context.ContextFlags = CONTEXT_FULL; if (SuspendThread(thread->handle) != -1) { if (!GetThreadContext(thread->handle, &dbg_context)) { dbg_printf("Can't get context for thread 0x%lx in current process\n", tid); ResumeThread(thread->handle); return; } } else { dbg_printf("Can't suspend thread 0x%lx in current process\n", tid); return; } } nf = 0; memset(&sf, 0, sizeof(sf)); memory_get_current_frame(&sf.AddrFrame); memory_get_current_pc(&sf.AddrPC); /* don't confuse StackWalk by passing in inconsistent addresses */ if ((sf.AddrPC.Mode == AddrModeFlat) && (sf.AddrFrame.Mode != AddrModeFlat)) { sf.AddrFrame.Offset = (DWORD)memory_to_linear_addr(&sf.AddrFrame); sf.AddrFrame.Mode = AddrModeFlat; } if (noisy) dbg_printf("Backtrace:\n"); while (StackWalk(IMAGE_FILE_MACHINE_I386, dbg_curr_process->handle, thread->handle, &sf, &dbg_context, NULL, SymFunctionTableAccess, SymGetModuleBase, NULL)) { if (tid == dbg_curr_tid) { frames = dbg_heap_realloc(frames, (nf + 1) * sizeof(IMAGEHLP_STACK_FRAME)); frames[nf].InstructionOffset = (unsigned long)memory_to_linear_addr(&sf.AddrPC); frames[nf].FrameOffset = (unsigned long)memory_to_linear_addr(&sf.AddrFrame); } if (noisy) { dbg_printf("%s%d ", (tid == dbg_curr_tid && nf == dbg_curr_frame ? "=>" : " "), nf + 1); print_addr_and_args(&sf.AddrPC, &sf.AddrFrame); dbg_printf(" ("); print_bare_address(&sf.AddrFrame); dbg_printf(")\n"); } nf++; /* we've probably gotten ourselves into an infinite loop so bail */ if (nf > 200) break; } dbg_context = saved_dbg_context; if (tid == dbg_curr_tid) { nframe = nf; } else { ResumeThread(thread->handle); } }