595 lines
19 KiB
C
595 lines
19 KiB
C
/*
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* Debugger memory handling
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*
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* Copyright 1993 Eric Youngdale
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* Copyright 1995 Alexandre Julliard
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* Copyright 2000-2005 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.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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void* be_cpu_linearize(HANDLE hThread, const ADDRESS* addr)
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{
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assert(addr->Mode == AddrModeFlat);
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return (void*)addr->Offset;
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}
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unsigned be_cpu_build_addr(HANDLE hThread, const CONTEXT* ctx, ADDRESS* addr,
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unsigned seg, unsigned long offset)
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{
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addr->Mode = AddrModeFlat;
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addr->Segment = 0; /* don't need segment */
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addr->Offset = offset;
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return TRUE;
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}
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void* memory_to_linear_addr(const ADDRESS* addr)
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{
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return be_cpu->linearize(dbg_curr_thread->handle, addr);
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}
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BOOL memory_get_current_pc(ADDRESS* addr)
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{
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assert(be_cpu->get_addr);
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return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
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be_cpu_addr_pc, addr);
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}
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BOOL memory_get_current_stack(ADDRESS* addr)
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{
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assert(be_cpu->get_addr);
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return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
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be_cpu_addr_stack, addr);
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}
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BOOL memory_get_current_frame(ADDRESS* addr)
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{
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assert(be_cpu->get_addr);
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return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
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be_cpu_addr_frame, addr);
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}
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static void memory_report_invalid_addr(const void* addr)
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{
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ADDRESS address;
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address.Mode = AddrModeFlat;
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address.Segment = 0;
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address.Offset = (unsigned long)addr;
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dbg_printf("*** Invalid address ");
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print_address(&address, FALSE);
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dbg_printf("\n");
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}
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/***********************************************************************
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* memory_read_value
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*
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* Read a memory value.
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*/
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BOOL memory_read_value(const struct dbg_lvalue* lvalue, DWORD size, void* result)
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{
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BOOL ret = FALSE;
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if (lvalue->cookie == DLV_TARGET)
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{
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void* linear = memory_to_linear_addr(&lvalue->addr);
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if (!(ret = dbg_read_memory(linear, result, size)))
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memory_report_invalid_addr(linear);
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}
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else
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{
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if (lvalue->addr.Offset)
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{
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memcpy(result, (void*)lvalue->addr.Offset, size);
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ret = TRUE;
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}
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}
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return TRUE;
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}
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/***********************************************************************
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* memory_write_value
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*
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* Store a value in memory.
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*/
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BOOL memory_write_value(const struct dbg_lvalue* lvalue, DWORD size, void* value)
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{
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BOOL ret = TRUE;
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DWORD64 os;
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os = ~(DWORD64)size;
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types_get_info(&lvalue->type, TI_GET_LENGTH, &os);
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assert(size == os);
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/* FIXME: only works on little endian systems */
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if (lvalue->cookie == DLV_TARGET)
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{
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void* linear = memory_to_linear_addr(&lvalue->addr);
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if (!(ret = dbg_write_memory(linear, value, size)))
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memory_report_invalid_addr(linear);
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}
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else
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{
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memcpy((void*)lvalue->addr.Offset, value, size);
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}
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return ret;
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}
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/***********************************************************************
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* memory_examine
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*
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* Implementation of the 'x' command.
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*/
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void memory_examine(const struct dbg_lvalue *lvalue, int count, char format)
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{
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int i;
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char buffer[256];
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ADDRESS addr;
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void *linear;
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types_extract_as_address(lvalue, &addr);
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linear = memory_to_linear_addr(&addr);
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if (format != 'i' && count > 1)
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{
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print_address(&addr, FALSE);
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dbg_printf(": ");
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}
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switch (format)
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{
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case 'u':
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if (count == 1) count = 256;
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memory_get_string(dbg_curr_process, linear,
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TRUE, TRUE, buffer, min(count, sizeof(buffer)));
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dbg_printf("%s\n", buffer);
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return;
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case 's':
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if (count == 1) count = 256;
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memory_get_string(dbg_curr_process, linear,
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TRUE, FALSE, buffer, min(count, sizeof(buffer)));
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dbg_printf("%s\n", buffer);
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return;
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case 'i':
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while (count-- && memory_disasm_one_insn(&addr));
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return;
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case 'g':
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while (count--)
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{
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GUID guid;
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if (!dbg_read_memory(linear, &guid, sizeof(guid)))
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{
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memory_report_invalid_addr(linear);
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break;
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}
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dbg_printf("{%08lx-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}\n",
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guid.Data1, guid.Data2, guid.Data3,
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guid.Data4[0], guid.Data4[1], guid.Data4[2], guid.Data4[3],
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guid.Data4[4], guid.Data4[5], guid.Data4[6], guid.Data4[7]);
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linear = (char*)linear + sizeof(guid);
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addr.Offset += sizeof(guid);
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if (count)
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{
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print_address(&addr, FALSE);
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dbg_printf(": ");
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}
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}
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return;
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#define DO_DUMP2(_t,_l,_f,_vv) { \
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_t _v; \
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for (i = 0; i < count; i++) { \
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if (!dbg_read_memory(linear, &_v, sizeof(_t))) \
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{ memory_report_invalid_addr(linear); break; } \
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dbg_printf(_f, (_vv)); \
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addr.Offset += sizeof(_t); \
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linear = (char*)linear + sizeof(_t); \
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if ((i % (_l)) == (_l) - 1 && i != count - 1) \
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{ \
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dbg_printf("\n"); \
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print_address(&addr, FALSE); \
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dbg_printf(": "); \
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} \
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} \
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dbg_printf("\n"); \
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} \
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return
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#define DO_DUMP(_t,_l,_f) DO_DUMP2(_t,_l,_f,_v)
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case 'x': DO_DUMP(int, 4, " %8.8x");
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case 'd': DO_DUMP(unsigned int, 4, " %10d");
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case 'w': DO_DUMP(unsigned short, 8, " %04x");
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case 'c': DO_DUMP2(char, 32, " %c", (_v < 0x20) ? ' ' : _v);
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case 'b': DO_DUMP2(char, 16, " %02x", (_v) & 0xff);
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}
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}
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BOOL memory_get_string(struct dbg_process* pcs, void* addr, BOOL in_debuggee,
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BOOL unicode, char* buffer, int size)
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{
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DWORD sz;
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WCHAR* buffW;
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buffer[0] = 0;
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if (!addr) return FALSE;
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if (in_debuggee)
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{
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BOOL ret;
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if (!unicode) ret = pcs->process_io->read(pcs->handle, addr, buffer, size, &sz);
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else
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{
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buffW = HeapAlloc(GetProcessHeap(), 0, size * sizeof(WCHAR));
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ret = pcs->process_io->read(pcs->handle, addr, buffW, size * sizeof(WCHAR), &sz);
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WideCharToMultiByte(CP_ACP, 0, buffW, sz / sizeof(WCHAR), buffer, size,
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NULL, NULL);
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HeapFree(GetProcessHeap(), 0, buffW);
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}
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if (size) buffer[size-1] = 0;
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return ret;
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}
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else
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{
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lstrcpynA(buffer, addr, size);
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}
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return TRUE;
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}
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BOOL memory_get_string_indirect(struct dbg_process* pcs, void* addr, BOOL unicode, char* buffer, int size)
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{
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void* ad;
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DWORD sz;
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buffer[0] = 0;
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if (addr &&
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pcs->process_io->read(pcs->handle, addr, &ad, sizeof(ad), &sz) && sz == sizeof(ad) && ad)
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{
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return memory_get_string(pcs, ad, TRUE, unicode, buffer, size);
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}
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return FALSE;
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}
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static void print_typed_basic(const struct dbg_lvalue* lvalue)
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{
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LONGLONG val_int;
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void* val_ptr;
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long double val_real;
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DWORD64 size64;
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DWORD tag, size, count, bt;
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struct dbg_type type = lvalue->type;
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struct dbg_type sub_type;
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if (!types_get_real_type(&type, &tag)) return;
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switch (tag)
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{
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case SymTagBaseType:
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if (!types_get_info(&type, TI_GET_LENGTH, &size64) ||
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!types_get_info(&type, TI_GET_BASETYPE, &bt))
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{
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WINE_ERR("Couldn't get information\n");
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RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
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}
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size = (DWORD)size64;
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switch (bt)
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{
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case btInt:
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if (!be_cpu->fetch_integer(lvalue, size, TRUE, &val_int)) return;
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dbg_printf("%lld", val_int);
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break;
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case btUInt:
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if (!be_cpu->fetch_integer(lvalue, size, FALSE, &val_int)) return;
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dbg_printf("%llu", val_int);
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break;
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case btFloat:
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if (!be_cpu->fetch_float(lvalue, size, &val_real)) return;
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dbg_printf("%Lf", val_real);
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break;
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case btChar:
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if (!be_cpu->fetch_integer(lvalue, size, TRUE, &val_int)) return;
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/* FIXME: should do the same for a Unicode character (size == 2) */
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if (size == 1 && (val_int < 0x20 || val_int > 0x80))
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dbg_printf("%d", (int)val_int);
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else
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dbg_printf("'%c'", (char)val_int);
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break;
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default:
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WINE_FIXME("Unsupported basetype %lu\n", bt);
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break;
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}
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break;
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case SymTagPointerType:
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if (!memory_read_value(lvalue, sizeof(void*), &val_ptr)) return;
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sub_type.module = lvalue->type.module;
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if (!types_get_info(&type, TI_GET_TYPE, &sub_type.id) ||
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sub_type.id == dbg_itype_none)
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{
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dbg_printf("Internal symbol error: unable to access memory location %p", val_ptr);
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break;
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}
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if (!types_get_real_type(&sub_type, &tag)) return;
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if (types_get_info(&sub_type, TI_GET_SYMTAG, &tag) && tag == SymTagBaseType &&
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types_get_info(&sub_type, TI_GET_BASETYPE, &bt) && bt == btChar &&
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types_get_info(&sub_type, TI_GET_LENGTH, &size64))
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{
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char buffer[1024];
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if (!val_ptr) dbg_printf("0x0");
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else if (memory_get_string(dbg_curr_process, val_ptr,
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lvalue->cookie == DLV_TARGET,
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size64 == 2, buffer, sizeof(buffer)))
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dbg_printf("\"%s\"", buffer);
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else
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dbg_printf("*** invalid address %p ***", val_ptr);
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}
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else dbg_printf("%p", val_ptr);
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break;
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case SymTagArrayType:
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case SymTagUDT:
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assert(lvalue->cookie == DLV_TARGET);
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if (!memory_read_value(lvalue, sizeof(val_ptr), &val_ptr)) return;
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dbg_printf("%p", val_ptr);
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break;
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case SymTagEnum:
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{
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BOOL ok = FALSE;
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assert(lvalue->cookie == DLV_TARGET);
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/* FIXME: it depends on underlying type for enums
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* (not supported yet in dbghelp)
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* Assuming 4 as for an int
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*/
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if (!be_cpu->fetch_integer(lvalue, 4, TRUE, &val_int)) return;
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if (types_get_info(&type, TI_GET_CHILDRENCOUNT, &count))
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{
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char buffer[sizeof(TI_FINDCHILDREN_PARAMS) + 256 * sizeof(DWORD)];
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TI_FINDCHILDREN_PARAMS* fcp = (TI_FINDCHILDREN_PARAMS*)buffer;
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WCHAR* ptr;
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char tmp[256];
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VARIANT variant;
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int i;
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fcp->Start = 0;
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while (count)
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{
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fcp->Count = min(count, 256);
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if (types_get_info(&type, TI_FINDCHILDREN, fcp))
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{
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sub_type.module = type.module;
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for (i = 0; i < min(fcp->Count, count); i++)
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{
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sub_type.id = fcp->ChildId[i];
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if (!types_get_info(&sub_type, TI_GET_VALUE, &variant))
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continue;
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switch (variant.n1.n2.vt)
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{
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case VT_I4: ok = (val_int == variant.n1.n2.n3.lVal); break;
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default: WINE_FIXME("Unsupported variant type (%u)\n", variant.n1.n2.vt);
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}
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if (ok)
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{
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ptr = NULL;
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types_get_info(&sub_type, TI_GET_SYMNAME, &ptr);
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if (!ptr) continue;
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WideCharToMultiByte(CP_ACP, 0, ptr, -1, tmp, sizeof(tmp), NULL, NULL);
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HeapFree(GetProcessHeap(), 0, ptr);
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dbg_printf("%s", tmp);
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count = 0; /* so that we'll get away from outter loop */
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break;
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}
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}
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}
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}
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count -= min(count, 256);
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fcp->Start += 256;
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}
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if (!ok) dbg_printf("%lld", val_int);
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}
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break;
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default:
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WINE_FIXME("Unsupported tag %lu\n", tag);
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break;
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}
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}
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/***********************************************************************
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* print_basic
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*
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* Implementation of the 'print' command.
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*/
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void print_basic(const struct dbg_lvalue* lvalue, int count, char format)
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{
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long int res;
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if (lvalue->type.id == dbg_itype_none)
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{
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dbg_printf("Unable to evaluate expression\n");
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return;
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}
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res = types_extract_as_integer(lvalue);
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/* FIXME: this implies i386 byte ordering */
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switch (format)
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{
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case 'x':
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if (lvalue->addr.Mode == AddrMode1616 ||
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lvalue->addr.Mode == AddrModeReal)
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dbg_printf("0x%04lx", res);
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else
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dbg_printf("0x%08lx", res);
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break;
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case 'd':
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dbg_printf("%ld\n", res);
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break;
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case 'c':
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dbg_printf("%d = '%c'", (char)(res & 0xff), (char)(res & 0xff));
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break;
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case 'u':
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{
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WCHAR wch = (WCHAR)(res & 0xFFFF);
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dbg_printf("%d = '", wch);
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dbg_outputW(&wch, 1);
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dbg_printf("'");
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}
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break;
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case 'i':
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case 's':
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case 'w':
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case 'b':
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dbg_printf("Format specifier '%c' is meaningless in 'print' command\n", format);
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case 0:
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if (lvalue->type.id == dbg_itype_segptr)
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dbg_printf("%ld", res);
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else
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print_typed_basic(lvalue);
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break;
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}
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}
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void print_bare_address(const ADDRESS* addr)
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{
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switch (addr->Mode)
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{
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case AddrModeFlat:
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dbg_printf("0x%08lx", addr->Offset);
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break;
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case AddrModeReal:
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case AddrMode1616:
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dbg_printf("0x%04x:0x%04lx", addr->Segment, addr->Offset);
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break;
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case AddrMode1632:
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dbg_printf("0x%04x:0x%08lx", addr->Segment, addr->Offset);
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break;
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default:
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dbg_printf("Unknown mode %x\n", addr->Mode);
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break;
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}
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}
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/***********************************************************************
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* print_address
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*
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* Print an 16- or 32-bit address, with the nearest symbol if any.
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*/
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void print_address(const ADDRESS* addr, BOOLEAN with_line)
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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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void* lin = memory_to_linear_addr(addr);
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DWORD64 disp64;
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DWORD disp;
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print_bare_address(addr);
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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, (DWORD_PTR)lin, &disp64, si)) return;
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dbg_printf(" %s", si->Name);
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if (disp64) dbg_printf("+0x%lx", (DWORD_PTR)disp64);
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if (with_line)
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{
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IMAGEHLP_LINE il;
|
|
IMAGEHLP_MODULE im;
|
|
|
|
il.SizeOfStruct = sizeof(il);
|
|
if (SymGetLineFromAddr(dbg_curr_process->handle, (DWORD_PTR)lin, &disp, &il))
|
|
dbg_printf(" [%s:%lu]", il.FileName, il.LineNumber);
|
|
im.SizeOfStruct = sizeof(im);
|
|
if (SymGetModuleInfo(dbg_curr_process->handle, (DWORD_PTR)lin, &im))
|
|
dbg_printf(" in %s", im.ModuleName);
|
|
}
|
|
}
|
|
|
|
BOOL memory_disasm_one_insn(ADDRESS* addr)
|
|
{
|
|
char ch;
|
|
|
|
print_address(addr, TRUE);
|
|
dbg_printf(": ");
|
|
if (!dbg_read_memory(memory_to_linear_addr(addr), &ch, sizeof(ch)))
|
|
{
|
|
dbg_printf("-- no code accessible --\n");
|
|
return FALSE;
|
|
}
|
|
be_cpu->disasm_one_insn(addr, TRUE);
|
|
dbg_printf("\n");
|
|
return TRUE;
|
|
}
|
|
|
|
void memory_disassemble(const struct dbg_lvalue* xstart,
|
|
const struct dbg_lvalue* xend, int instruction_count)
|
|
{
|
|
static ADDRESS last = {0,0,0};
|
|
int stop = 0;
|
|
int i;
|
|
|
|
if (!xstart && !xend)
|
|
{
|
|
if (!last.Segment && !last.Offset) memory_get_current_pc(&last);
|
|
}
|
|
else
|
|
{
|
|
if (xstart)
|
|
types_extract_as_address(xstart, &last);
|
|
if (xend)
|
|
stop = types_extract_as_integer(xend);
|
|
}
|
|
for (i = 0; (instruction_count == 0 || i < instruction_count) &&
|
|
(stop == 0 || last.Offset <= stop); i++)
|
|
memory_disasm_one_insn(&last);
|
|
}
|
|
|
|
BOOL memory_get_register(DWORD regno, DWORD** value, char* buffer, int len)
|
|
{
|
|
const struct dbg_internal_var* div;
|
|
|
|
if (dbg_curr_thread->curr_frame != 0)
|
|
{
|
|
if (buffer) snprintf(buffer, len, "<register not in topmost frame>");
|
|
return FALSE;
|
|
}
|
|
for (div = dbg_context_vars; div->name; div++)
|
|
{
|
|
if (div->val == regno)
|
|
{
|
|
*value = div->pval;
|
|
snprintf(buffer, len, div->name);
|
|
return TRUE;
|
|
}
|
|
}
|
|
if (buffer) snprintf(buffer, len, "<unknown register %lu>", regno);
|
|
return FALSE;
|
|
}
|