mirror of
git://source.winehq.org/git/wine.git
synced 2024-10-31 08:49:15 +00:00
2ce5eca6a5
Added correct stabs parsing for function parameters in registers. Added a couple of helper functions to make code smaller and more readable.
386 lines
12 KiB
C
386 lines
12 KiB
C
/*
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* Debugger stack handling
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*
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* Copyright 1995 Alexandre Julliard
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* Copyright 1996 Eric Youngdale
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* Copyright 1999 Ove Kåven
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include "debugger.h"
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#include "winbase.h"
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#include "wine/winbase16.h"
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#include "wine/debug.h"
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#include "tlhelp32.h"
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WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
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/***********************************************************************
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* stack_info
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*
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* Dump the top of the stack
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*/
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void stack_info(void)
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{
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struct dbg_lvalue lvalue;
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lvalue.cookie = 0;
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lvalue.type.id = dbg_itype_none;
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lvalue.type.module = 0;
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/* FIXME: we assume stack grows the same way as on i386 */
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if (!memory_get_current_stack(&lvalue.addr))
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dbg_printf("Bad segment (%d)\n", lvalue.addr.Segment);
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dbg_printf("Stack dump:\n");
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switch (lvalue.addr.Mode)
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{
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case AddrModeFlat: /* 32-bit mode */
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case AddrMode1632: /* 32-bit mode */
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memory_examine(&lvalue, 24, 'x');
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break;
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case AddrModeReal: /* 16-bit mode */
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case AddrMode1616:
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memory_examine(&lvalue, 24, 'w');
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break;
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}
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}
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static BOOL stack_set_frame_internal(int newframe)
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{
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if (newframe >= dbg_curr_thread->num_frames)
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newframe = dbg_curr_thread->num_frames - 1;
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if (newframe < 0)
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newframe = 0;
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if (dbg_curr_thread->curr_frame != newframe)
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{
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IMAGEHLP_STACK_FRAME ihsf;
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dbg_curr_thread->curr_frame = newframe;
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stack_get_current_frame(&ihsf);
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SymSetContext(dbg_curr_process->handle, &ihsf, NULL);
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}
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return TRUE;
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}
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static BOOL stack_get_frame(int nf, IMAGEHLP_STACK_FRAME* ihsf)
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{
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ihsf->InstructionOffset = (unsigned long)memory_to_linear_addr(&dbg_curr_thread->frames[nf].addr_pc);
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ihsf->FrameOffset = (unsigned long)memory_to_linear_addr(&dbg_curr_thread->frames[nf].addr_frame);
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return TRUE;
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}
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BOOL stack_get_current_frame(IMAGEHLP_STACK_FRAME* ihsf)
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{
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/*
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* If we don't have a valid backtrace, then just return.
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*/
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if (dbg_curr_thread->frames == NULL) return FALSE;
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return stack_get_frame(dbg_curr_thread->curr_frame, ihsf);
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}
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BOOL stack_set_frame(int newframe)
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{
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ADDRESS addr;
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if (!stack_set_frame_internal(newframe)) return FALSE;
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addr.Mode = AddrModeFlat;
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addr.Offset = (unsigned long)memory_to_linear_addr(&dbg_curr_thread->frames[dbg_curr_thread->curr_frame].addr_pc);
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source_list_from_addr(&addr, 0);
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return TRUE;
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}
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/******************************************************************
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* stack_get_current_symbol
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*
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* Retrieves the symbol information for the current frame element
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*/
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BOOL stack_get_current_symbol(SYMBOL_INFO* symbol)
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{
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IMAGEHLP_STACK_FRAME ihsf;
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DWORD64 disp;
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if (!stack_get_current_frame(&ihsf)) return FALSE;
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return SymFromAddr(dbg_curr_process->handle, ihsf.InstructionOffset,
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&disp, symbol);
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}
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/******************************************************************
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* stack_fetch_frames
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*
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* Do a backtrace on the the current thread
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*/
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unsigned stack_fetch_frames(void)
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{
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STACKFRAME sf;
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unsigned nf = 0;
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HeapFree(GetProcessHeap(), 0, dbg_curr_thread->frames);
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dbg_curr_thread->frames = NULL;
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memset(&sf, 0, sizeof(sf));
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memory_get_current_frame(&sf.AddrFrame);
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memory_get_current_pc(&sf.AddrPC);
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/* don't confuse StackWalk by passing in inconsistent addresses */
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if ((sf.AddrPC.Mode == AddrModeFlat) && (sf.AddrFrame.Mode != AddrModeFlat))
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{
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sf.AddrFrame.Offset = (DWORD)memory_to_linear_addr(&sf.AddrFrame);
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sf.AddrFrame.Mode = AddrModeFlat;
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}
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while (StackWalk(IMAGE_FILE_MACHINE_I386, dbg_curr_process->handle,
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dbg_curr_thread->handle, &sf, &dbg_context, NULL,
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SymFunctionTableAccess, SymGetModuleBase, NULL))
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{
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dbg_curr_thread->frames = dbg_heap_realloc(dbg_curr_thread->frames,
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(nf + 1) * sizeof(dbg_curr_thread->frames[0]));
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dbg_curr_thread->frames[nf].addr_pc = sf.AddrPC;
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dbg_curr_thread->frames[nf].addr_frame = sf.AddrFrame;
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nf++;
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/* we've probably gotten ourselves into an infinite loop so bail */
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if (nf > 200) break;
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}
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dbg_curr_thread->curr_frame = -1;
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dbg_curr_thread->num_frames = nf;
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stack_set_frame_internal(0);
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return nf;
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}
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struct sym_enum
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{
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char* tmp;
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DWORD frame;
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};
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static BOOL WINAPI sym_enum_cb(SYMBOL_INFO* sym_info, ULONG size, void* user)
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{
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struct sym_enum* se = (struct sym_enum*)user;
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char tmp[32];
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if (sym_info->Flags & SYMFLAG_PARAMETER)
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{
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if (se->tmp[0]) strcat(se->tmp, ", ");
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if (sym_info->Flags & SYMFLAG_REGREL)
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{
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unsigned val;
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DWORD addr = se->frame + sym_info->Address;
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if (!dbg_read_memory((char*)addr, &val, sizeof(val)))
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snprintf(tmp, sizeof(tmp), "<*** cannot read at 0x%lx ***>", addr);
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else
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snprintf(tmp, sizeof(tmp), "0x%x", val);
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}
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else if (sym_info->Flags & SYMFLAG_REGISTER)
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{
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DWORD* pval;
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if (memory_get_register(sym_info->Register, &pval, tmp, sizeof(tmp)))
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snprintf(tmp, sizeof(tmp), "0x%lx", *pval);
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}
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sprintf(se->tmp + strlen(se->tmp), "%s=%s", sym_info->Name, tmp);
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}
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return TRUE;
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}
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static void stack_print_addr_and_args(int nf)
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{
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char buffer[sizeof(SYMBOL_INFO) + 256];
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SYMBOL_INFO* si = (SYMBOL_INFO*)buffer;
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IMAGEHLP_STACK_FRAME ihsf;
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IMAGEHLP_LINE il;
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IMAGEHLP_MODULE im;
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DWORD64 disp64;
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print_bare_address(&dbg_curr_thread->frames[nf].addr_pc);
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stack_get_frame(nf, &ihsf);
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/* grab module where symbol is. If we don't have a module, we cannot print more */
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im.SizeOfStruct = sizeof(im);
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if (!SymGetModuleInfo(dbg_curr_process->handle, ihsf.InstructionOffset, &im))
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return;
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si->SizeOfStruct = sizeof(*si);
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si->MaxNameLen = 256;
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if (SymFromAddr(dbg_curr_process->handle, ihsf.InstructionOffset, &disp64, si))
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{
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struct sym_enum se;
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char tmp[1024];
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DWORD disp;
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dbg_printf(" %s", si->Name);
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if (disp) dbg_printf("+0x%lx", (DWORD_PTR)disp64);
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SymSetContext(dbg_curr_process->handle, &ihsf, NULL);
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se.tmp = tmp;
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se.frame = ihsf.FrameOffset;
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tmp[0] = '\0';
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SymEnumSymbols(dbg_curr_process->handle, 0, NULL, sym_enum_cb, &se);
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if (tmp[0]) dbg_printf("(%s)", tmp);
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il.SizeOfStruct = sizeof(il);
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if (SymGetLineFromAddr(dbg_curr_process->handle, ihsf.InstructionOffset,
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&disp, &il))
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dbg_printf(" [%s:%lu]", il.FileName, il.LineNumber);
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dbg_printf(" in %s", im.ModuleName);
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}
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else dbg_printf(" in %s (+0x%lx)",
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im.ModuleName, (DWORD_PTR)(ihsf.InstructionOffset - im.BaseOfImage));
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}
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/******************************************************************
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* backtrace
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*
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* Do a backtrace on the the current thread
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*/
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static void backtrace(void)
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{
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unsigned cf = dbg_curr_thread->curr_frame;
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IMAGEHLP_STACK_FRAME ihsf;
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dbg_printf("Backtrace:\n");
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for (dbg_curr_thread->curr_frame = 0;
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dbg_curr_thread->curr_frame < dbg_curr_thread->num_frames;
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dbg_curr_thread->curr_frame++)
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{
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dbg_printf("%s%d ",
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(cf == dbg_curr_thread->curr_frame ? "=>" : " "),
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dbg_curr_thread->curr_frame + 1);
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stack_print_addr_and_args(dbg_curr_thread->curr_frame);
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dbg_printf(" (");
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print_bare_address(&dbg_curr_thread->frames[dbg_curr_thread->curr_frame].addr_pc);
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dbg_printf(")\n");
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}
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/* reset context to current stack frame */
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dbg_curr_thread->curr_frame = cf;
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stack_get_frame(dbg_curr_thread->curr_frame, &ihsf);
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SymSetContext(dbg_curr_process->handle, &ihsf, NULL);
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}
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/******************************************************************
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* backtrace_tid
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*
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* Do a backtrace on a thread from its process and its identifier
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* (preserves current thread and context information)
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*/
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static void backtrace_tid(struct dbg_process* pcs, DWORD tid)
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{
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struct dbg_thread* thread = dbg_curr_thread;
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if (!(dbg_curr_thread = dbg_get_thread(pcs, tid)))
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dbg_printf("Unknown thread id (0x%lx) in process (0x%lx)\n", tid, pcs->pid);
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else
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{
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CONTEXT saved_ctx = dbg_context;
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dbg_curr_tid = dbg_curr_thread->tid;
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memset(&dbg_context, 0, sizeof(dbg_context));
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dbg_context.ContextFlags = CONTEXT_FULL;
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if (SuspendThread(dbg_curr_thread->handle) != -1)
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{
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if (!GetThreadContext(dbg_curr_thread->handle, &dbg_context))
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{
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dbg_printf("Can't get context for thread 0x%lx in current process\n",
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tid);
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}
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else backtrace();
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ResumeThread(dbg_curr_thread->handle);
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}
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else dbg_printf("Can't suspend thread 0x%lx in current process\n", tid);
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dbg_context = saved_ctx;
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}
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dbg_curr_thread = thread;
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dbg_curr_tid = thread ? thread->tid : 0;
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}
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/******************************************************************
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* backtrace_all
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*
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* Do a backtrace on every running thread in the system (except the debugger)
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* (preserves current process information)
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*/
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static void backtrace_all(void)
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{
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THREADENTRY32 entry;
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HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
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if (snapshot == INVALID_HANDLE_VALUE)
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{
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dbg_printf("Unable to create toolhelp snapshot\n");
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return;
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}
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entry.dwSize = sizeof(entry);
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if (Thread32First(snapshot, &entry))
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{
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do
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{
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if (entry.th32OwnerProcessID == GetCurrentProcessId()) continue;
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if (dbg_curr_process && dbg_curr_pid != entry.th32OwnerProcessID)
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dbg_detach_debuggee();
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if (entry.th32OwnerProcessID != dbg_curr_pid)
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{
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if (!dbg_attach_debuggee(entry.th32OwnerProcessID, FALSE, TRUE))
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{
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dbg_printf("\nwarning: could not attach to 0x%lx\n",
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entry.th32OwnerProcessID);
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continue;
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}
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dbg_curr_pid = dbg_curr_process->pid;
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}
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dbg_printf("\nBacktracing for thread 0x%lx in process 0x%lx (%s):\n",
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entry.th32ThreadID, dbg_curr_pid, dbg_curr_process->imageName);
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backtrace_tid(dbg_curr_process, entry.th32ThreadID);
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}
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while (Thread32Next(snapshot, &entry));
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if (dbg_curr_process)
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dbg_detach_debuggee();
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}
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CloseHandle(snapshot);
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}
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void stack_backtrace(DWORD tid)
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{
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/* backtrace every thread in every process except the debugger itself,
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* invoking via "bt all"
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*/
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if (tid == -1) return backtrace_all();
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if (!dbg_curr_process)
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{
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dbg_printf("You must be attached to a process to run this command.\n");
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return;
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}
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if (tid == dbg_curr_tid)
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{
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backtrace();
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}
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else
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{
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backtrace_tid(dbg_curr_process, tid);
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}
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}
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