| /* |
| * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
| */ |
| |
| #include "config.h" |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| |
| #include "debugger.h" |
| #include "winbase.h" |
| #include "wine/winbase16.h" |
| #include "tlhelp32.h" |
| |
| /*********************************************************************** |
| * stack_info |
| * |
| * Dump the top of the stack |
| */ |
| void stack_info(void) |
| { |
| struct dbg_lvalue lvalue; |
| |
| lvalue.cookie = 0; |
| lvalue.type.id = dbg_itype_segptr; |
| 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; |
| } |
| } |
| |
| static BOOL stack_set_frame_internal(int newframe) |
| { |
| if (newframe >= dbg_curr_thread->num_frames) |
| newframe = dbg_curr_thread->num_frames - 1; |
| if (newframe < 0) |
| newframe = 0; |
| |
| if (dbg_curr_thread->curr_frame != newframe) |
| { |
| IMAGEHLP_STACK_FRAME ihsf; |
| |
| dbg_curr_thread->curr_frame = newframe; |
| stack_get_current_frame(&ihsf); |
| SymSetContext(dbg_curr_process->handle, &ihsf, NULL); |
| } |
| return TRUE; |
| } |
| |
| static BOOL stack_get_frame(int nf, IMAGEHLP_STACK_FRAME* ihsf) |
| { |
| memset(ihsf, 0, sizeof(*ihsf)); |
| ihsf->InstructionOffset = dbg_curr_thread->frames[nf].linear_pc; |
| ihsf->FrameOffset = dbg_curr_thread->frames[nf].linear_frame; |
| return TRUE; |
| } |
| |
| BOOL stack_get_current_frame(IMAGEHLP_STACK_FRAME* ihsf) |
| { |
| /* |
| * If we don't have a valid backtrace, then just return. |
| */ |
| if (dbg_curr_thread->frames == NULL) return FALSE; |
| return stack_get_frame(dbg_curr_thread->curr_frame, ihsf); |
| } |
| |
| BOOL stack_get_register_current_frame(unsigned regno, DWORD** pval) |
| { |
| enum be_cpu_addr kind; |
| |
| if (dbg_curr_thread->frames == NULL) return FALSE; |
| |
| if (!be_cpu->get_register_info(regno, &kind)) return FALSE; |
| |
| switch (kind) |
| { |
| case be_cpu_addr_pc: |
| *pval = &dbg_curr_thread->frames[dbg_curr_thread->curr_frame].linear_pc; |
| break; |
| case be_cpu_addr_stack: |
| *pval = &dbg_curr_thread->frames[dbg_curr_thread->curr_frame].linear_stack; |
| break; |
| case be_cpu_addr_frame: |
| *pval = &dbg_curr_thread->frames[dbg_curr_thread->curr_frame].linear_frame; |
| break; |
| } |
| return TRUE; |
| } |
| |
| BOOL stack_set_frame(int newframe) |
| { |
| ADDRESS64 addr; |
| if (!stack_set_frame_internal(newframe)) return FALSE; |
| addr.Mode = AddrModeFlat; |
| addr.Offset = (unsigned long)memory_to_linear_addr(&dbg_curr_thread->frames[dbg_curr_thread->curr_frame].addr_pc); |
| source_list_from_addr(&addr, 0); |
| return TRUE; |
| } |
| |
| /****************************************************************** |
| * stack_get_current_symbol |
| * |
| * Retrieves the symbol information for the current frame element |
| */ |
| BOOL stack_get_current_symbol(SYMBOL_INFO* symbol) |
| { |
| IMAGEHLP_STACK_FRAME ihsf; |
| DWORD64 disp; |
| |
| if (!stack_get_current_frame(&ihsf)) return FALSE; |
| return SymFromAddr(dbg_curr_process->handle, ihsf.InstructionOffset, |
| &disp, symbol); |
| } |
| |
| static BOOL CALLBACK stack_read_mem(HANDLE hProc, DWORD64 addr, |
| PVOID buffer, DWORD size, PDWORD written) |
| { |
| SIZE_T sz; |
| BOOL ret; |
| |
| struct dbg_process* pcs = dbg_get_process_h(hProc); |
| if (!pcs) return FALSE; |
| ret = pcs->process_io->read(hProc, (const void*)(DWORD_PTR)addr, buffer, |
| size, &sz); |
| if (written != NULL) *written = sz; |
| return ret; |
| } |
| |
| /****************************************************************** |
| * stack_fetch_frames |
| * |
| * Do a backtrace on the the current thread |
| */ |
| unsigned stack_fetch_frames(void) |
| { |
| STACKFRAME64 sf; |
| unsigned nf = 0; |
| /* as native stackwalk can modify the context passed to it, simply copy |
| * it to avoid any damage |
| */ |
| CONTEXT ctx = dbg_context; |
| |
| HeapFree(GetProcessHeap(), 0, dbg_curr_thread->frames); |
| dbg_curr_thread->frames = NULL; |
| |
| 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; |
| } |
| |
| while (StackWalk64(IMAGE_FILE_MACHINE_I386, dbg_curr_process->handle, |
| dbg_curr_thread->handle, &sf, &ctx, stack_read_mem, |
| SymFunctionTableAccess64, SymGetModuleBase64, NULL)) |
| { |
| dbg_curr_thread->frames = dbg_heap_realloc(dbg_curr_thread->frames, |
| (nf + 1) * sizeof(dbg_curr_thread->frames[0])); |
| |
| dbg_curr_thread->frames[nf].addr_pc = sf.AddrPC; |
| dbg_curr_thread->frames[nf].linear_pc = (DWORD)memory_to_linear_addr(&sf.AddrPC); |
| dbg_curr_thread->frames[nf].addr_frame = sf.AddrFrame; |
| dbg_curr_thread->frames[nf].linear_frame = (DWORD)memory_to_linear_addr(&sf.AddrFrame); |
| dbg_curr_thread->frames[nf].addr_stack = sf.AddrStack; |
| dbg_curr_thread->frames[nf].linear_stack = (DWORD)memory_to_linear_addr(&sf.AddrStack); |
| nf++; |
| /* we've probably gotten ourselves into an infinite loop so bail */ |
| if (nf > 200) break; |
| } |
| dbg_curr_thread->curr_frame = -1; |
| dbg_curr_thread->num_frames = nf; |
| stack_set_frame_internal(0); |
| return nf; |
| } |
| |
| struct sym_enum |
| { |
| DWORD frame; |
| BOOL first; |
| }; |
| |
| static BOOL WINAPI sym_enum_cb(PSYMBOL_INFO sym_info, ULONG size, PVOID user) |
| { |
| struct sym_enum* se = (struct sym_enum*)user; |
| |
| if (sym_info->Flags & SYMFLAG_PARAMETER) |
| { |
| if (!se->first) dbg_printf(", "); else se->first = FALSE; |
| symbol_print_local(sym_info, se->frame, FALSE); |
| } |
| return TRUE; |
| } |
| |
| static void stack_print_addr_and_args(int nf) |
| { |
| char buffer[sizeof(SYMBOL_INFO) + 256]; |
| SYMBOL_INFO* si = (SYMBOL_INFO*)buffer; |
| IMAGEHLP_STACK_FRAME ihsf; |
| IMAGEHLP_LINE il; |
| IMAGEHLP_MODULE im; |
| DWORD64 disp64; |
| |
| print_bare_address(&dbg_curr_thread->frames[nf].addr_pc); |
| |
| stack_get_frame(nf, &ihsf); |
| |
| /* grab module where symbol is. If we don't have a module, we cannot print more */ |
| im.SizeOfStruct = sizeof(im); |
| if (!SymGetModuleInfo(dbg_curr_process->handle, ihsf.InstructionOffset, &im)) |
| return; |
| |
| si->SizeOfStruct = sizeof(*si); |
| si->MaxNameLen = 256; |
| if (SymFromAddr(dbg_curr_process->handle, ihsf.InstructionOffset, &disp64, si)) |
| { |
| struct sym_enum se; |
| DWORD disp; |
| |
| dbg_printf(" %s", si->Name); |
| if (disp64) dbg_printf("+0x%lx", (DWORD_PTR)disp64); |
| |
| SymSetContext(dbg_curr_process->handle, &ihsf, NULL); |
| se.first = TRUE; |
| se.frame = ihsf.FrameOffset; |
| dbg_printf("("); |
| SymEnumSymbols(dbg_curr_process->handle, 0, NULL, sym_enum_cb, &se); |
| dbg_printf(")"); |
| |
| il.SizeOfStruct = sizeof(il); |
| if (SymGetLineFromAddr(dbg_curr_process->handle, ihsf.InstructionOffset, |
| &disp, &il)) |
| dbg_printf(" [%s:%u]", il.FileName, il.LineNumber); |
| dbg_printf(" in %s", im.ModuleName); |
| } |
| else dbg_printf(" in %s (+0x%lx)", |
| im.ModuleName, (DWORD_PTR)(ihsf.InstructionOffset - im.BaseOfImage)); |
| } |
| |
| /****************************************************************** |
| * backtrace |
| * |
| * Do a backtrace on the the current thread |
| */ |
| static void backtrace(void) |
| { |
| unsigned cf = dbg_curr_thread->curr_frame; |
| IMAGEHLP_STACK_FRAME ihsf; |
| |
| dbg_printf("Backtrace:\n"); |
| for (dbg_curr_thread->curr_frame = 0; |
| dbg_curr_thread->curr_frame < dbg_curr_thread->num_frames; |
| dbg_curr_thread->curr_frame++) |
| { |
| dbg_printf("%s%d ", |
| (cf == dbg_curr_thread->curr_frame ? "=>" : " "), |
| dbg_curr_thread->curr_frame + 1); |
| stack_print_addr_and_args(dbg_curr_thread->curr_frame); |
| dbg_printf(" ("); |
| print_bare_address(&dbg_curr_thread->frames[dbg_curr_thread->curr_frame].addr_frame); |
| dbg_printf(")\n"); |
| } |
| /* reset context to current stack frame */ |
| dbg_curr_thread->curr_frame = cf; |
| if (!dbg_curr_thread->frames) return; |
| stack_get_frame(dbg_curr_thread->curr_frame, &ihsf); |
| SymSetContext(dbg_curr_process->handle, &ihsf, NULL); |
| } |
| |
| /****************************************************************** |
| * 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) |
| { |
| struct dbg_thread* thread = dbg_curr_thread; |
| |
| if (!(dbg_curr_thread = dbg_get_thread(pcs, tid))) |
| dbg_printf("Unknown thread id (%04x) in process (%04x)\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 %04x in current process\n", |
| tid); |
| } |
| else |
| { |
| stack_fetch_frames(); |
| backtrace(); |
| } |
| ResumeThread(dbg_curr_thread->handle); |
| } |
| else dbg_printf("Can't suspend thread %04x 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) |
| { |
| struct dbg_process* process = dbg_curr_process; |
| 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)) |
| { |
| do |
| { |
| if (entry.th32OwnerProcessID == GetCurrentProcessId()) continue; |
| if (dbg_curr_process && dbg_curr_pid != entry.th32OwnerProcessID) |
| dbg_curr_process->process_io->close_process(dbg_curr_process, FALSE); |
| |
| if (entry.th32OwnerProcessID != dbg_curr_pid) |
| { |
| if (!dbg_attach_debuggee(entry.th32OwnerProcessID, FALSE)) |
| { |
| dbg_printf("\nwarning: could not attach to %04x\n", |
| entry.th32OwnerProcessID); |
| continue; |
| } |
| dbg_curr_pid = dbg_curr_process->pid; |
| dbg_active_wait_for_first_exception(); |
| } |
| |
| dbg_printf("\nBacktracing for thread %04x in process %04x (%s):\n", |
| entry.th32ThreadID, dbg_curr_pid, dbg_curr_process->imageName); |
| backtrace_tid(dbg_curr_process, entry.th32ThreadID); |
| } |
| while (Thread32Next(snapshot, &entry)); |
| |
| if (dbg_curr_process) |
| dbg_curr_process->process_io->close_process(dbg_curr_process, FALSE); |
| } |
| CloseHandle(snapshot); |
| dbg_curr_process = process; |
| dbg_curr_pid = process ? process->pid : 0; |
| } |
| |
| void stack_backtrace(DWORD tid) |
| { |
| /* 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) |
| { |
| backtrace(); |
| } |
| else |
| { |
| backtrace_tid(dbg_curr_process, tid); |
| } |
| } |
