963 lines
30 KiB
C
963 lines
30 KiB
C
/*
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* Debugger break-points handling
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*
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* Copyright 1994 Martin von Loewis
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* Copyright 1995 Alexandre Julliard
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* Copyright 1999,2000 Eric Pouech
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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 "debugger.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
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/***********************************************************************
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* break_set_xpoints
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*
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* Set or remove all the breakpoints & watchpoints
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*/
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void break_set_xpoints(BOOL set)
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{
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static BOOL last; /* = 0 = FALSE */
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unsigned int i, ret, size;
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void* addr;
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struct dbg_breakpoint* bp = dbg_curr_process->bp;
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if (set == last) return;
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last = set;
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for (i = 0; i < dbg_curr_process->next_bp; i++)
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{
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if (!bp[i].refcount || !bp[i].enabled) continue;
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if (bp[i].xpoint_type == be_xpoint_break)
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size = 0;
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else
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size = bp[i].w.len + 1;
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addr = (void*)memory_to_linear_addr(&bp[i].addr);
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if (set)
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ret = be_cpu->insert_Xpoint(dbg_curr_process->handle, &dbg_context,
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bp[i].xpoint_type, addr,
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&bp[i].info, size);
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else
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ret = be_cpu->remove_Xpoint(dbg_curr_process->handle, &dbg_context,
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bp[i].xpoint_type, addr,
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bp[i].info, size);
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if (!ret)
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{
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dbg_printf("Invalid address (");
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print_address(&bp[i].addr, FALSE);
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dbg_printf(") for breakpoint %d, disabling it\n", i);
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bp[i].enabled = FALSE;
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}
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}
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}
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/***********************************************************************
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* find_xpoint
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*
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* Find the breakpoint for a given address. Return the breakpoint
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* number or -1 if none.
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*/
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static int find_xpoint(const ADDRESS* addr, enum be_xpoint_type type)
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{
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int i;
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void* lin = memory_to_linear_addr(addr);
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struct dbg_breakpoint* bp = dbg_curr_process->bp;
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for (i = 0; i < dbg_curr_process->next_bp; i++)
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{
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if (bp[i].refcount && bp[i].enabled && bp[i].xpoint_type == type &&
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memory_to_linear_addr(&bp[i].addr) == lin)
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return i;
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}
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return -1;
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}
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/***********************************************************************
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* init_xpoint
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*
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* Find an empty slot in BP table to add a new break/watch point
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*/
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static int init_xpoint(int type, const ADDRESS* addr)
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{
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int num;
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struct dbg_breakpoint* bp = dbg_curr_process->bp;
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for (num = (dbg_curr_process->next_bp < MAX_BREAKPOINTS) ?
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dbg_curr_process->next_bp++ : 1;
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num < MAX_BREAKPOINTS; num++)
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{
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if (bp[num].refcount == 0)
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{
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bp[num].refcount = 1;
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bp[num].enabled = TRUE;
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bp[num].xpoint_type = type;
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bp[num].skipcount = 0;
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bp[num].addr = *addr;
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return num;
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}
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}
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dbg_printf("Too many bp. Please delete some.\n");
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return -1;
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}
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/***********************************************************************
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* get_watched_value
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*
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* Returns the value watched by watch point 'num'.
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*/
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static BOOL get_watched_value(int num, LPDWORD val)
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{
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BYTE buf[4];
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if (!dbg_read_memory(memory_to_linear_addr(&dbg_curr_process->bp[num].addr),
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buf, dbg_curr_process->bp[num].w.len + 1))
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return FALSE;
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switch (dbg_curr_process->bp[num].w.len + 1)
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{
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case 4: *val = *(DWORD*)buf; break;
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case 2: *val = *(WORD*)buf; break;
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case 1: *val = *(BYTE*)buf; break;
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default: RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
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}
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return TRUE;
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}
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/***********************************************************************
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* break_add_break
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*
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* Add a breakpoint.
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*/
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BOOL break_add_break(const ADDRESS* addr, BOOL verbose)
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{
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int num;
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BYTE ch;
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struct dbg_breakpoint* bp = dbg_curr_process->bp;
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if ((num = find_xpoint(addr, be_xpoint_break)) >= 1)
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{
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bp[num].refcount++;
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dbg_printf("Breakpoint %d at ", num);
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print_address(&bp[num].addr, TRUE);
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dbg_printf(" (refcount=%d)\n", bp[num].refcount);
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return TRUE;
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}
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if (!dbg_read_memory(memory_to_linear_addr(addr), &ch, sizeof(ch)))
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{
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if (verbose)
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{
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dbg_printf("Invalid address ");
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print_bare_address(addr);
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dbg_printf(", can't set breakpoint\n");
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}
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return FALSE;
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}
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if ((num = init_xpoint(be_xpoint_break, addr)) == -1)
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return FALSE;
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dbg_printf("Breakpoint %d at ", num);
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print_address(&bp[num].addr, TRUE);
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dbg_printf("\n");
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return TRUE;
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}
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/***********************************************************************
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* break_add_break_from_lvalue
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*
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* Add a breakpoint.
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*/
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BOOL break_add_break_from_lvalue(const struct dbg_lvalue* lvalue)
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{
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ADDRESS addr;
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addr.Mode = AddrModeFlat;
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addr.Offset = types_extract_as_integer(lvalue);
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if (!break_add_break(&addr, TRUE))
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{
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if (!DBG_IVAR(CanDeferOnBPByAddr))
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{
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dbg_printf("Invalid address, can't set breakpoint\n"
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"You can turn on deferring bp by address by setting $CanDeferOnBPByAddr to 1\n");
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return FALSE;
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}
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dbg_printf("Unable to add breakpoint, will check again any time a new DLL is loaded\n");
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dbg_curr_process->delayed_bp =
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dbg_heap_realloc(dbg_curr_process->delayed_bp,
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sizeof(struct dbg_delayed_bp) * ++dbg_curr_process->num_delayed_bp);
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dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].is_symbol = FALSE;
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dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].u.addr = addr;
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return TRUE;
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}
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return FALSE;
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}
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/***********************************************************************
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* break_add_break_from_id
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*
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* Add a breakpoint from a function name (and eventually a line #)
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*/
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void break_add_break_from_id(const char *name, int lineno)
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{
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struct dbg_lvalue lvalue;
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int i;
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switch (symbol_get_lvalue(name, lineno, &lvalue, TRUE))
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{
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case sglv_found:
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break_add_break(&lvalue.addr, TRUE);
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return;
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case sglv_unknown:
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break;
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case sglv_aborted: /* user aborted symbol lookup */
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return;
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}
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dbg_printf("Unable to add breakpoint, will check again when a new DLL is loaded\n");
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for (i = 0; i < dbg_curr_process->num_delayed_bp; i++)
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{
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if (dbg_curr_process->delayed_bp[i].is_symbol &&
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!strcmp(name, dbg_curr_process->delayed_bp[i].u.symbol.name) &&
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lineno == dbg_curr_process->delayed_bp[i].u.symbol.lineno)
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return;
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}
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dbg_curr_process->delayed_bp = dbg_heap_realloc(dbg_curr_process->delayed_bp,
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sizeof(struct dbg_delayed_bp) * ++dbg_curr_process->num_delayed_bp);
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dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].is_symbol = TRUE;
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dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].u.symbol.name = strcpy(HeapAlloc(GetProcessHeap(), 0, strlen(name) + 1), name);
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dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].u.symbol.lineno = lineno;
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}
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/***********************************************************************
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* break_add_break_from_lineno
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*
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* Add a breakpoint from a line number in current file
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*/
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void break_add_break_from_lineno(int lineno)
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{
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ADDRESS addr;
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memory_get_current_pc(&addr);
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if (lineno != -1)
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{
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IMAGEHLP_LINE il;
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IMAGEHLP_LINE iil;
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BOOL found = FALSE;
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il.SizeOfStruct = sizeof(il);
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if (!SymGetLineFromAddr(dbg_curr_process->handle,
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(DWORD)memory_to_linear_addr(&addr), NULL, &il))
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{
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dbg_printf("Unable to add breakpoint (unknown address)\n");
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return;
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}
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iil = il;
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while (SymGetLinePrev(dbg_curr_process->handle, &iil))
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{
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if (lineno == iil.LineNumber && !strcmp(il.FileName, iil.FileName))
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{
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addr.Mode = AddrModeFlat;
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addr.Offset = iil.Address;
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found = TRUE;
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break;
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}
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}
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iil = il;
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if (!found) while (SymGetLineNext(dbg_curr_process->handle, &iil))
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{
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if (lineno == iil.LineNumber && !strcmp(il.FileName, iil.FileName))
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{
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addr.Mode = AddrModeFlat;
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addr.Offset = iil.Address;
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found = TRUE;
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break;
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}
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}
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if (!found)
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{
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dbg_printf("Unknown line number\n"
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"(either out of file, or no code at given line number)\n");
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return;
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}
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}
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break_add_break(&addr, TRUE);
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}
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/***********************************************************************
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* break_check_delayed_bp
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*
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* Check is a registered delayed BP is now available.
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*/
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void break_check_delayed_bp(void)
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{
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struct dbg_lvalue lvalue;
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int i;
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struct dbg_delayed_bp* dbp = dbg_curr_process->delayed_bp;
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for (i = 0; i < dbg_curr_process->num_delayed_bp; i++)
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{
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if (dbp[i].is_symbol)
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{
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if (symbol_get_lvalue(dbp[i].u.symbol.name, dbp[i].u.symbol.lineno,
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&lvalue, TRUE) != sglv_found)
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continue;
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if (lvalue.cookie != DLV_TARGET) continue;
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}
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else
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lvalue.addr = dbp[i].u.addr;
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WINE_TRACE("trying to add delayed %s-bp\n", dbp[i].is_symbol ? "S" : "A");
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if (!dbp[i].is_symbol)
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WINE_TRACE("\t%04x:%08lx\n",
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dbp[i].u.addr.Segment, dbp[i].u.addr.Offset);
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else
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WINE_TRACE("\t'%s' @ %d\n",
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dbp[i].u.symbol.name, dbp[i].u.symbol.lineno);
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if (break_add_break(&lvalue.addr, FALSE))
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memmove(&dbp[i], &dbp[i+1], (--dbg_curr_process->num_delayed_bp - i) * sizeof(*dbp));
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}
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}
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/***********************************************************************
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* break_add_watch
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*
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* Add a watchpoint.
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*/
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static void break_add_watch(const struct dbg_lvalue* lvalue, BOOL is_write)
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{
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int num;
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DWORD l = 4;
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num = init_xpoint((is_write) ? be_xpoint_watch_write : be_xpoint_watch_read,
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&lvalue->addr);
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if (num == -1) return;
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if (lvalue->type.id != dbg_itype_none)
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{
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if (types_get_info(&lvalue->type, TI_GET_LENGTH, &l))
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{
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switch (l)
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{
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case 4: case 2: case 1: break;
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default:
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dbg_printf("Unsupported length (%lu) for watch-points, defaulting to 4\n", l);
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break;
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}
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}
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else dbg_printf("Cannot get watch size, defaulting to 4\n");
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}
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dbg_curr_process->bp[num].w.len = l - 1;
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if (!get_watched_value(num, &dbg_curr_process->bp[num].w.oldval))
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{
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dbg_printf("Bad address. Watchpoint not set\n");
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dbg_curr_process->bp[num].refcount = 0;
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return;
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}
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dbg_printf("Watchpoint %d at ", num);
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print_address(&dbg_curr_process->bp[num].addr, TRUE);
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dbg_printf("\n");
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}
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/******************************************************************
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* break_add_watch_from_lvalue
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*
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* Adds a watch point from an address (stored in a lvalue)
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*/
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void break_add_watch_from_lvalue(const struct dbg_lvalue* lvalue)
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{
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struct dbg_lvalue lval;
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lval.addr.Mode = AddrModeFlat;
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lval.addr.Offset = types_extract_as_integer(lvalue);
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lval.type.id = dbg_itype_none;
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break_add_watch(&lval, TRUE);
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}
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/***********************************************************************
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* break_add_watch_from_id
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*
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* Add a watchpoint from a symbol name
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*/
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void break_add_watch_from_id(const char *name)
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{
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struct dbg_lvalue lvalue;
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switch (symbol_get_lvalue(name, -1, &lvalue, TRUE))
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{
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case sglv_found:
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break_add_watch(&lvalue, 1);
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break;
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case sglv_unknown:
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dbg_printf("Unable to add watchpoint\n");
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break;
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case sglv_aborted: /* user aborted symbol lookup */
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break;
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}
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}
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/***********************************************************************
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* break_delete_xpoint
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*
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* Delete a breakpoint.
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*/
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void break_delete_xpoint(int num)
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{
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struct dbg_breakpoint* bp = dbg_curr_process->bp;
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if ((num <= 0) || (num >= dbg_curr_process->next_bp) ||
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bp[num].refcount == 0)
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{
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dbg_printf("Invalid breakpoint number %d\n", num);
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return;
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}
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if (--bp[num].refcount > 0)
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return;
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if (bp[num].condition != NULL)
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{
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expr_free(bp[num].condition);
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bp[num].condition = NULL;
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}
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bp[num].enabled = FALSE;
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bp[num].refcount = 0;
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bp[num].skipcount = 0;
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}
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static inline BOOL module_is_container(const IMAGEHLP_MODULE* wmod_cntnr,
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const IMAGEHLP_MODULE* wmod_child)
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{
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return wmod_cntnr->BaseOfImage <= wmod_child->BaseOfImage &&
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(DWORD)wmod_cntnr->BaseOfImage + wmod_cntnr->ImageSize >=
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(DWORD)wmod_child->BaseOfImage + wmod_child->ImageSize;
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}
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/******************************************************************
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* break_delete_xpoints_from_module
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*
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* Remove all Xpoints from module which base is 'base'
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*/
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void break_delete_xpoints_from_module(unsigned long base)
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{
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IMAGEHLP_MODULE im, im_elf;
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int i;
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DWORD linear;
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struct dbg_breakpoint* bp = dbg_curr_process->bp;
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/* FIXME: should do it also on the ELF sibbling if any */
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im.SizeOfStruct = sizeof(im);
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im_elf.SizeOfStruct = sizeof(im_elf);
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if (!SymGetModuleInfo(dbg_curr_process->handle, base, &im)) return;
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/* try to get in fact the underlying ELF module (if any) */
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if (SymGetModuleInfo(dbg_curr_process->handle, im.BaseOfImage - 1, &im_elf) &&
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im_elf.BaseOfImage <= im.BaseOfImage &&
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(DWORD)im_elf.BaseOfImage + im_elf.ImageSize >= (DWORD)im.BaseOfImage + im.ImageSize)
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im = im_elf;
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for (i = 0; i < dbg_curr_process->next_bp; i++)
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{
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linear = (DWORD)memory_to_linear_addr(&bp[i].addr);
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if (bp[i].refcount && bp[i].enabled &&
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im.BaseOfImage <= linear && linear < im.BaseOfImage + im.ImageSize)
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{
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break_delete_xpoint(i);
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}
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}
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}
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/***********************************************************************
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* break_enable_xpoint
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*
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* Enable or disable a break point.
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*/
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void break_enable_xpoint(int num, BOOL enable)
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{
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if ((num <= 0) || (num >= dbg_curr_process->next_bp) ||
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dbg_curr_process->bp[num].refcount == 0)
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{
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dbg_printf("Invalid breakpoint number %d\n", num);
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return;
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}
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dbg_curr_process->bp[num].enabled = (enable) ? TRUE : FALSE;
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dbg_curr_process->bp[num].skipcount = 0;
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}
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/***********************************************************************
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* find_triggered_watch
|
|
*
|
|
* Lookup the watchpoints to see if one has been triggered
|
|
* Return >= (watch point index) if one is found and *oldval is set to
|
|
* the value watched before the TRAP
|
|
* Return -1 if none found (*oldval is undetermined)
|
|
*
|
|
* Unfortunately, Linux does *NOT* (A REAL PITA) report with ptrace
|
|
* the DR6 register value, so we have to look with our own need the
|
|
* cause of the TRAP.
|
|
* -EP
|
|
*/
|
|
static int find_triggered_watch(LPDWORD oldval)
|
|
{
|
|
int found = -1;
|
|
int i;
|
|
struct dbg_breakpoint* bp = dbg_curr_process->bp;
|
|
|
|
/* Method 1 => get triggered watchpoint from context (doesn't work on Linux
|
|
* 2.2.x). This should be fixed in >= 2.2.16
|
|
*/
|
|
for (i = 0; i < dbg_curr_process->next_bp; i++)
|
|
{
|
|
DWORD val = 0;
|
|
|
|
if (bp[i].refcount && bp[i].enabled && bp[i].xpoint_type != be_xpoint_break &&
|
|
(be_cpu->is_watchpoint_set(&dbg_context, bp[i].info)))
|
|
{
|
|
be_cpu->clear_watchpoint(&dbg_context, bp[i].info);
|
|
|
|
*oldval = bp[i].w.oldval;
|
|
if (get_watched_value(i, &val))
|
|
{
|
|
bp[i].w.oldval = val;
|
|
return i;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Method 1 failed, trying method 2 */
|
|
|
|
/* Method 2 => check if value has changed among registered watchpoints
|
|
* this really sucks, but this is how gdb 4.18 works on my linux box
|
|
* -EP
|
|
*/
|
|
for (i = 0; i < dbg_curr_process->next_bp; i++)
|
|
{
|
|
DWORD val = 0;
|
|
|
|
if (bp[i].refcount && bp[i].enabled && bp[i].xpoint_type != be_xpoint_break &&
|
|
get_watched_value(i, &val))
|
|
{
|
|
*oldval = bp[i].w.oldval;
|
|
if (val != *oldval)
|
|
{
|
|
be_cpu->clear_watchpoint(&dbg_context, bp[i].info);
|
|
bp[i].w.oldval = val;
|
|
found = i;
|
|
/* cannot break, because two watch points may have been triggered on
|
|
* the same access
|
|
* only one will be reported to the user (FIXME ?)
|
|
*/
|
|
}
|
|
}
|
|
}
|
|
return found;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* break_info
|
|
*
|
|
* Display break & watch points information.
|
|
*/
|
|
void break_info(void)
|
|
{
|
|
int i;
|
|
int nbp = 0, nwp = 0;
|
|
struct dbg_delayed_bp* dbp = dbg_curr_process->delayed_bp;
|
|
struct dbg_breakpoint* bp = dbg_curr_process->bp;
|
|
|
|
for (i = 1; i < dbg_curr_process->next_bp; i++)
|
|
{
|
|
if (bp[i].refcount)
|
|
{
|
|
if (bp[i].xpoint_type == be_xpoint_break) nbp++; else nwp++;
|
|
}
|
|
}
|
|
|
|
if (nbp)
|
|
{
|
|
dbg_printf("Breakpoints:\n");
|
|
for (i = 1; i < dbg_curr_process->next_bp; i++)
|
|
{
|
|
if (!bp[i].refcount || bp[i].xpoint_type != be_xpoint_break)
|
|
continue;
|
|
dbg_printf("%d: %c ", i, bp[i].enabled ? 'y' : 'n');
|
|
print_address(&bp[i].addr, TRUE);
|
|
dbg_printf(" (%u)\n", bp[i].refcount);
|
|
if (bp[i].condition != NULL)
|
|
{
|
|
dbg_printf("\t\tstop when ");
|
|
expr_print(bp[i].condition);
|
|
dbg_printf("\n");
|
|
}
|
|
}
|
|
}
|
|
else dbg_printf("No breakpoints\n");
|
|
if (nwp)
|
|
{
|
|
dbg_printf("Watchpoints:\n");
|
|
for (i = 1; i < dbg_curr_process->next_bp; i++)
|
|
{
|
|
if (!bp[i].refcount || bp[i].xpoint_type == be_xpoint_break)
|
|
continue;
|
|
dbg_printf("%d: %c ", i, bp[i].enabled ? 'y' : 'n');
|
|
print_address(&bp[i].addr, TRUE);
|
|
dbg_printf(" on %d byte%s (%c)\n",
|
|
bp[i].w.len + 1, bp[i].w.len > 0 ? "s" : "",
|
|
bp[i].xpoint_type == be_xpoint_watch_write ? 'W' : 'R');
|
|
if (bp[i].condition != NULL)
|
|
{
|
|
dbg_printf("\t\tstop when ");
|
|
expr_print(bp[i].condition);
|
|
dbg_printf("\n");
|
|
}
|
|
}
|
|
}
|
|
else dbg_printf("No watchpoints\n");
|
|
if (dbg_curr_process->num_delayed_bp)
|
|
{
|
|
dbg_printf("Delayed breakpoints:\n");
|
|
for (i = 0; i < dbg_curr_process->num_delayed_bp; i++)
|
|
{
|
|
if (dbp[i].is_symbol)
|
|
{
|
|
dbg_printf("%d: %s", i, dbp[i].u.symbol.name);
|
|
if (dbp[i].u.symbol.lineno != -1)
|
|
dbg_printf(" at line %u", dbp[i].u.symbol.lineno);
|
|
}
|
|
else
|
|
{
|
|
dbg_printf("%d: ", i);
|
|
print_address(&dbp[i].u.addr, FALSE);
|
|
}
|
|
dbg_printf("\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
/***********************************************************************
|
|
* should_stop
|
|
*
|
|
* Check whether or not the condition (bp / skipcount) of a break/watch
|
|
* point are met.
|
|
*/
|
|
static BOOL should_stop(int bpnum)
|
|
{
|
|
struct dbg_breakpoint* bp = &dbg_curr_process->bp[bpnum];
|
|
|
|
if (bp->condition != NULL)
|
|
{
|
|
struct dbg_lvalue lvalue = expr_eval(bp->condition);
|
|
|
|
if (lvalue.type.id == dbg_itype_none)
|
|
{
|
|
/*
|
|
* Something wrong - unable to evaluate this expression.
|
|
*/
|
|
dbg_printf("Unable to evaluate expression ");
|
|
expr_print(bp->condition);
|
|
dbg_printf("\nTurning off condition\n");
|
|
break_add_condition(bpnum, NULL);
|
|
}
|
|
else if (!types_extract_as_integer(&lvalue))
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
if (bp->skipcount > 0) bp->skipcount--;
|
|
return bp->skipcount == 0;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* break_should_continue
|
|
*
|
|
* Determine if we should continue execution after a SIGTRAP signal when
|
|
* executing in the given mode.
|
|
*/
|
|
BOOL break_should_continue(ADDRESS* addr, DWORD code, int* count, BOOL* is_break)
|
|
{
|
|
int bpnum;
|
|
DWORD oldval;
|
|
int wpnum;
|
|
enum dbg_exec_mode mode = dbg_curr_thread->exec_mode;
|
|
|
|
*is_break = FALSE;
|
|
/* If not single-stepping, back up to the break instruction */
|
|
if (code == EXCEPTION_BREAKPOINT)
|
|
addr->Offset += be_cpu->adjust_pc_for_break(&dbg_context, TRUE);
|
|
|
|
bpnum = find_xpoint(addr, be_xpoint_break);
|
|
dbg_curr_process->bp[0].enabled = FALSE; /* disable the step-over breakpoint */
|
|
|
|
if (bpnum > 0)
|
|
{
|
|
if (!should_stop(bpnum)) return TRUE;
|
|
|
|
dbg_printf("Stopped on breakpoint %d at ", bpnum);
|
|
print_address(&dbg_curr_process->bp[bpnum].addr, TRUE);
|
|
dbg_printf("\n");
|
|
return FALSE;
|
|
}
|
|
|
|
wpnum = find_triggered_watch(&oldval);
|
|
if (wpnum > 0)
|
|
{
|
|
/* If not single-stepping, do not back up over the break instruction */
|
|
if (code == EXCEPTION_BREAKPOINT)
|
|
addr->Offset += be_cpu->adjust_pc_for_break(&dbg_context, FALSE);
|
|
|
|
if (!should_stop(wpnum)) return TRUE;
|
|
|
|
dbg_printf("Stopped on watchpoint %d at ", wpnum);
|
|
print_address(addr, TRUE);
|
|
dbg_printf(" values: old=%lu new=%lu\n",
|
|
oldval, dbg_curr_process->bp[wpnum].w.oldval);
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* If our mode indicates that we are stepping line numbers,
|
|
* get the current function, and figure out if we are exactly
|
|
* on a line number or not.
|
|
*/
|
|
if (mode == dbg_exec_step_over_line || mode == dbg_exec_step_into_line)
|
|
{
|
|
if (symbol_get_function_line_status(addr) == dbg_on_a_line_number)
|
|
{
|
|
(*count)--;
|
|
}
|
|
}
|
|
else if (mode == dbg_exec_step_over_insn || mode == dbg_exec_step_into_insn)
|
|
{
|
|
(*count)--;
|
|
}
|
|
|
|
if (*count > 0 || mode == dbg_exec_finish)
|
|
{
|
|
/*
|
|
* We still need to execute more instructions.
|
|
*/
|
|
return TRUE;
|
|
}
|
|
|
|
/* If there's no breakpoint and we are not single-stepping, then
|
|
* either we must have encountered a break insn in the Windows program
|
|
* or someone is trying to stop us
|
|
*/
|
|
if (bpnum == -1 && code == EXCEPTION_BREAKPOINT)
|
|
{
|
|
*is_break = TRUE;
|
|
addr->Offset += be_cpu->adjust_pc_for_break(&dbg_context, FALSE);
|
|
return FALSE;
|
|
}
|
|
|
|
/* no breakpoint, continue if in continuous mode */
|
|
return mode == dbg_exec_cont || mode == dbg_exec_finish;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* break_suspend_execution
|
|
*
|
|
* Remove all bp before entering the debug loop
|
|
*/
|
|
void break_suspend_execution(void)
|
|
{
|
|
break_set_xpoints(FALSE);
|
|
dbg_curr_process->bp[0] = dbg_curr_thread->step_over_bp;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* break_restart_execution
|
|
*
|
|
* Set the bp to the correct state to restart execution
|
|
* in the given mode.
|
|
*/
|
|
void break_restart_execution(int count)
|
|
{
|
|
ADDRESS addr;
|
|
int bp;
|
|
enum dbg_line_status status;
|
|
enum dbg_exec_mode mode, ret_mode;
|
|
ADDRESS callee;
|
|
void* linear;
|
|
|
|
memory_get_current_pc(&addr);
|
|
linear = memory_to_linear_addr(&addr);
|
|
|
|
/*
|
|
* This is the mode we will be running in after we finish. We would like
|
|
* to be able to modify this in certain cases.
|
|
*/
|
|
ret_mode = mode = dbg_curr_thread->exec_mode;
|
|
|
|
bp = find_xpoint(&addr, be_xpoint_break);
|
|
if (bp != -1 && bp != 0)
|
|
{
|
|
/*
|
|
* If we have set a new value, then save it in the BP number.
|
|
*/
|
|
if (count != 0 && mode == dbg_exec_cont)
|
|
{
|
|
dbg_curr_process->bp[bp].skipcount = count;
|
|
}
|
|
mode = dbg_exec_step_into_insn; /* If there's a breakpoint, skip it */
|
|
}
|
|
else if (mode == dbg_exec_cont && count > 1)
|
|
{
|
|
dbg_printf("Not stopped at any breakpoint; argument ignored.\n");
|
|
}
|
|
|
|
if (mode == dbg_exec_finish && be_cpu->is_function_return(linear))
|
|
{
|
|
mode = ret_mode = dbg_exec_step_into_insn;
|
|
}
|
|
|
|
/*
|
|
* See if the function we are stepping into has debug info
|
|
* and line numbers. If not, then we step over it instead.
|
|
* FIXME - we need to check for things like thunks or trampolines,
|
|
* as the actual function may in fact have debug info.
|
|
*/
|
|
if (be_cpu->is_function_call(linear, &callee))
|
|
{
|
|
status = symbol_get_function_line_status(&callee);
|
|
#if 0
|
|
/* FIXME: we need to get the thunk type */
|
|
/*
|
|
* Anytime we have a trampoline, step over it.
|
|
*/
|
|
if ((mode == EXEC_STEP_OVER || mode == EXEC_STEPI_OVER)
|
|
&& status == dbg_in_a_thunk)
|
|
{
|
|
WINE_WARN("Not stepping into trampoline at %p (no lines)\n",
|
|
memory_to_linear_addr(&callee));
|
|
mode = EXEC_STEP_OVER_TRAMPOLINE;
|
|
}
|
|
#endif
|
|
if (mode == dbg_exec_step_into_line && status == dbg_no_line_info)
|
|
{
|
|
WINE_WARN("Not stepping into function at %p (no lines)\n",
|
|
memory_to_linear_addr(&callee));
|
|
mode = dbg_exec_step_over_line;
|
|
}
|
|
}
|
|
|
|
if (mode == dbg_exec_step_into_line &&
|
|
symbol_get_function_line_status(&addr) == dbg_no_line_info)
|
|
{
|
|
dbg_printf("Single stepping until exit from function, \n"
|
|
"which has no line number information.\n");
|
|
ret_mode = mode = dbg_exec_finish;
|
|
}
|
|
|
|
switch (mode)
|
|
{
|
|
case dbg_exec_cont: /* Continuous execution */
|
|
be_cpu->single_step(&dbg_context, FALSE);
|
|
break_set_xpoints(TRUE);
|
|
break;
|
|
|
|
#if 0
|
|
case EXEC_STEP_OVER_TRAMPOLINE:
|
|
/*
|
|
* This is the means by which we step over our conversion stubs
|
|
* in callfrom*.s and callto*.s. We dig the appropriate address
|
|
* off the stack, and we set the breakpoint there instead of the
|
|
* address just after the call.
|
|
*/
|
|
be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
|
|
be_cpu_addr_stack, &addr);
|
|
/* FIXME: we assume stack grows as on a i386 */
|
|
addr.Offset += 2 * sizeof(unsigned int);
|
|
dbg_read_memory(memory_to_linear_addr(&addr),
|
|
&addr.Offset, sizeof(addr.Offset));
|
|
dbg_curr_process->bp[0].addr = addr;
|
|
dbg_curr_process->bp[0].enabled = TRUE;
|
|
dbg_curr_process->bp[0].refcount = 1;
|
|
dbg_curr_process->bp[0].skipcount = 0;
|
|
dbg_curr_process->bp[0].xpoint_type = be_xpoint_break;
|
|
dbg_curr_process->bp[0].condition = NULL;
|
|
be_cpu->single_step(&dbg_context, FALSE);
|
|
break_set_xpoints(TRUE);
|
|
break;
|
|
#endif
|
|
|
|
case dbg_exec_finish:
|
|
case dbg_exec_step_over_insn: /* Stepping over a call */
|
|
case dbg_exec_step_over_line: /* Stepping over a call */
|
|
if (be_cpu->is_step_over_insn(linear))
|
|
{
|
|
be_cpu->disasm_one_insn(&addr, FALSE);
|
|
dbg_curr_process->bp[0].addr = addr;
|
|
dbg_curr_process->bp[0].enabled = TRUE;
|
|
dbg_curr_process->bp[0].refcount = 1;
|
|
dbg_curr_process->bp[0].skipcount = 0;
|
|
dbg_curr_process->bp[0].xpoint_type = be_xpoint_break;
|
|
dbg_curr_process->bp[0].condition = NULL;
|
|
be_cpu->single_step(&dbg_context, FALSE);
|
|
break_set_xpoints(TRUE);
|
|
break;
|
|
}
|
|
/* else fall through to single-stepping */
|
|
|
|
case dbg_exec_step_into_line: /* Single-stepping a line */
|
|
case dbg_exec_step_into_insn: /* Single-stepping an instruction */
|
|
be_cpu->single_step(&dbg_context, TRUE);
|
|
break;
|
|
default: RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
|
|
}
|
|
dbg_curr_thread->step_over_bp = dbg_curr_process->bp[0];
|
|
dbg_curr_thread->exec_mode = ret_mode;
|
|
}
|
|
|
|
int break_add_condition(int num, struct expr* exp)
|
|
{
|
|
if (num <= 0 || num >= dbg_curr_process->next_bp ||
|
|
!dbg_curr_process->bp[num].refcount)
|
|
{
|
|
dbg_printf("Invalid breakpoint number %d\n", num);
|
|
return FALSE;
|
|
}
|
|
|
|
if (dbg_curr_process->bp[num].condition != NULL)
|
|
{
|
|
expr_free(dbg_curr_process->bp[num].condition);
|
|
dbg_curr_process->bp[num].condition = NULL;
|
|
}
|
|
|
|
if (exp != NULL) dbg_curr_process->bp[num].condition = expr_clone(exp, NULL);
|
|
|
|
return TRUE;
|
|
}
|