/* * 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 #include "debugger.h" #include "winbase.h" #include "wine/winbase16.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; } BOOL 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; } /****************************************************************** * backtrace * * Do a backtrace on the the current thread */ static unsigned backtrace(BOOL with_frames, BOOL noisy) { STACKFRAME sf; unsigned 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, dbg_curr_thread->handle, &sf, &dbg_context, NULL, SymFunctionTableAccess, SymGetModuleBase, NULL)) { if (with_frames) { 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 ", (with_frames && 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; } return nf; } /****************************************************************** * backtrace_tid * * Do a backtrace on a thread from its process and its identifier * (preserves current thread and context information) */ static void backtrace_tid(struct dbg_process* pcs, DWORD tid, BOOL noisy) { struct dbg_thread* thread = dbg_curr_thread; if (!(dbg_curr_thread = dbg_get_thread(pcs, tid))) dbg_printf("Unknown thread id (0x%lx) in process (0x%lx)\n", tid, pcs->pid); else { CONTEXT saved_ctx = dbg_context; dbg_curr_tid = dbg_curr_thread->tid; memset(&dbg_context, 0, sizeof(dbg_context)); dbg_context.ContextFlags = CONTEXT_FULL; if (SuspendThread(dbg_curr_thread->handle) != -1) { if (!GetThreadContext(dbg_curr_thread->handle, &dbg_context)) { dbg_printf("Can't get context for thread 0x%lx in current process\n", tid); } else backtrace(FALSE, noisy); ResumeThread(dbg_curr_thread->handle); } else dbg_printf("Can't suspend thread 0x%lx in current process\n", tid); dbg_context = saved_ctx; } dbg_curr_thread = thread; dbg_curr_tid = thread ? thread->tid : 0; } /****************************************************************** * backtrace_all * * Do a backtrace on every running thread in the system (except the debugger) * (preserves current process information) */ static void backtrace_all(void) { 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)) { struct dbg_process* cp = dbg_curr_process; DWORD cpid = dbg_curr_pid; do { if (entry.th32OwnerProcessID == GetCurrentProcessId()) continue; if (dbg_curr_process && dbg_curr_pid != cpid) dbg_detach_debuggee(); if (entry.th32OwnerProcessID == cpid) dbg_curr_process = cp; else if (entry.th32OwnerProcessID != dbg_curr_pid) { if (!dbg_attach_debuggee(entry.th32OwnerProcessID, FALSE, TRUE)) { dbg_printf("\nwarning: could not attach to 0x%lx\n", entry.th32OwnerProcessID); continue; } dbg_curr_pid = dbg_curr_process->pid; } dbg_printf("\nBacktracing for thread 0x%lx in process 0x%lx (%s):\n", entry.th32ThreadID, dbg_curr_pid, dbg_curr_process->imageName); backtrace_tid(dbg_curr_process, entry.th32ThreadID, TRUE); } while (Thread32Next(snapshot, &entry)); if (dbg_curr_process && dbg_curr_pid != cpid) dbg_detach_debuggee(); dbg_curr_process = cp; dbg_curr_pid = cpid; } CloseHandle(snapshot); } void stack_backtrace(DWORD tid, BOOL noisy) { /* backtrace every thread in every process except the debugger itself, * invoking via "bt all" */ if (tid == -1) return backtrace_all(); if (!dbg_curr_process) { dbg_printf("You must be attached to a process to run this command.\n"); return; } if (tid == dbg_curr_tid) { HeapFree(GetProcessHeap(), 0, frames); frames = NULL; nframe = backtrace(TRUE, noisy); } else { backtrace_tid(dbg_curr_process, tid, noisy); } }