Sweden-Number/programs/winedbg/memory.c

595 lines
19 KiB
C

/*
* Debugger memory handling
*
* Copyright 1993 Eric Youngdale
* Copyright 1995 Alexandre Julliard
* Copyright 2000-2005 Eric Pouech
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "debugger.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
void* be_cpu_linearize(HANDLE hThread, const ADDRESS* addr)
{
assert(addr->Mode == AddrModeFlat);
return (void*)addr->Offset;
}
unsigned be_cpu_build_addr(HANDLE hThread, const CONTEXT* ctx, ADDRESS* addr,
unsigned seg, unsigned long offset)
{
addr->Mode = AddrModeFlat;
addr->Segment = 0; /* don't need segment */
addr->Offset = offset;
return TRUE;
}
void* memory_to_linear_addr(const ADDRESS* addr)
{
return be_cpu->linearize(dbg_curr_thread->handle, addr);
}
BOOL memory_get_current_pc(ADDRESS* addr)
{
assert(be_cpu->get_addr);
return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
be_cpu_addr_pc, addr);
}
BOOL memory_get_current_stack(ADDRESS* addr)
{
assert(be_cpu->get_addr);
return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
be_cpu_addr_stack, addr);
}
BOOL memory_get_current_frame(ADDRESS* addr)
{
assert(be_cpu->get_addr);
return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
be_cpu_addr_frame, addr);
}
static void memory_report_invalid_addr(const void* addr)
{
ADDRESS address;
address.Mode = AddrModeFlat;
address.Segment = 0;
address.Offset = (unsigned long)addr;
dbg_printf("*** Invalid address ");
print_address(&address, FALSE);
dbg_printf("\n");
}
/***********************************************************************
* memory_read_value
*
* Read a memory value.
*/
BOOL memory_read_value(const struct dbg_lvalue* lvalue, DWORD size, void* result)
{
BOOL ret = FALSE;
if (lvalue->cookie == DLV_TARGET)
{
void* linear = memory_to_linear_addr(&lvalue->addr);
if (!(ret = dbg_read_memory(linear, result, size)))
memory_report_invalid_addr(linear);
}
else
{
if (lvalue->addr.Offset)
{
memcpy(result, (void*)lvalue->addr.Offset, size);
ret = TRUE;
}
}
return TRUE;
}
/***********************************************************************
* memory_write_value
*
* Store a value in memory.
*/
BOOL memory_write_value(const struct dbg_lvalue* lvalue, DWORD size, void* value)
{
BOOL ret = TRUE;
DWORD64 os;
os = ~(DWORD64)size;
types_get_info(&lvalue->type, TI_GET_LENGTH, &os);
assert(size == os);
/* FIXME: only works on little endian systems */
if (lvalue->cookie == DLV_TARGET)
{
void* linear = memory_to_linear_addr(&lvalue->addr);
if (!(ret = dbg_write_memory(linear, value, size)))
memory_report_invalid_addr(linear);
}
else
{
memcpy((void*)lvalue->addr.Offset, value, size);
}
return ret;
}
/***********************************************************************
* memory_examine
*
* Implementation of the 'x' command.
*/
void memory_examine(const struct dbg_lvalue *lvalue, int count, char format)
{
int i;
char buffer[256];
ADDRESS addr;
void *linear;
types_extract_as_address(lvalue, &addr);
linear = memory_to_linear_addr(&addr);
if (format != 'i' && count > 1)
{
print_address(&addr, FALSE);
dbg_printf(": ");
}
switch (format)
{
case 'u':
if (count == 1) count = 256;
memory_get_string(dbg_curr_process, linear,
TRUE, TRUE, buffer, min(count, sizeof(buffer)));
dbg_printf("%s\n", buffer);
return;
case 's':
if (count == 1) count = 256;
memory_get_string(dbg_curr_process, linear,
TRUE, FALSE, buffer, min(count, sizeof(buffer)));
dbg_printf("%s\n", buffer);
return;
case 'i':
while (count-- && memory_disasm_one_insn(&addr));
return;
case 'g':
while (count--)
{
GUID guid;
if (!dbg_read_memory(linear, &guid, sizeof(guid)))
{
memory_report_invalid_addr(linear);
break;
}
dbg_printf("{%08lx-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}\n",
guid.Data1, guid.Data2, guid.Data3,
guid.Data4[0], guid.Data4[1], guid.Data4[2], guid.Data4[3],
guid.Data4[4], guid.Data4[5], guid.Data4[6], guid.Data4[7]);
linear = (char*)linear + sizeof(guid);
addr.Offset += sizeof(guid);
if (count)
{
print_address(&addr, FALSE);
dbg_printf(": ");
}
}
return;
#define DO_DUMP2(_t,_l,_f,_vv) { \
_t _v; \
for (i = 0; i < count; i++) { \
if (!dbg_read_memory(linear, &_v, sizeof(_t))) \
{ memory_report_invalid_addr(linear); break; } \
dbg_printf(_f, (_vv)); \
addr.Offset += sizeof(_t); \
linear = (char*)linear + sizeof(_t); \
if ((i % (_l)) == (_l) - 1 && i != count - 1) \
{ \
dbg_printf("\n"); \
print_address(&addr, FALSE); \
dbg_printf(": "); \
} \
} \
dbg_printf("\n"); \
} \
return
#define DO_DUMP(_t,_l,_f) DO_DUMP2(_t,_l,_f,_v)
case 'x': DO_DUMP(int, 4, " %8.8x");
case 'd': DO_DUMP(unsigned int, 4, " %10d");
case 'w': DO_DUMP(unsigned short, 8, " %04x");
case 'c': DO_DUMP2(char, 32, " %c", (_v < 0x20) ? ' ' : _v);
case 'b': DO_DUMP2(char, 16, " %02x", (_v) & 0xff);
}
}
BOOL memory_get_string(struct dbg_process* pcs, void* addr, BOOL in_debuggee,
BOOL unicode, char* buffer, int size)
{
DWORD sz;
WCHAR* buffW;
buffer[0] = 0;
if (!addr) return FALSE;
if (in_debuggee)
{
BOOL ret;
if (!unicode) ret = pcs->process_io->read(pcs->handle, addr, buffer, size, &sz);
else
{
buffW = HeapAlloc(GetProcessHeap(), 0, size * sizeof(WCHAR));
ret = pcs->process_io->read(pcs->handle, addr, buffW, size * sizeof(WCHAR), &sz);
WideCharToMultiByte(CP_ACP, 0, buffW, sz / sizeof(WCHAR), buffer, size,
NULL, NULL);
HeapFree(GetProcessHeap(), 0, buffW);
}
if (size) buffer[size-1] = 0;
return ret;
}
else
{
lstrcpynA(buffer, addr, size);
}
return TRUE;
}
BOOL memory_get_string_indirect(struct dbg_process* pcs, void* addr, BOOL unicode, char* buffer, int size)
{
void* ad;
DWORD sz;
buffer[0] = 0;
if (addr &&
pcs->process_io->read(pcs->handle, addr, &ad, sizeof(ad), &sz) && sz == sizeof(ad) && ad)
{
return memory_get_string(pcs, ad, TRUE, unicode, buffer, size);
}
return FALSE;
}
static void print_typed_basic(const struct dbg_lvalue* lvalue)
{
LONGLONG val_int;
void* val_ptr;
long double val_real;
DWORD64 size64;
DWORD tag, size, count, bt;
struct dbg_type type = lvalue->type;
struct dbg_type sub_type;
if (!types_get_real_type(&type, &tag)) return;
switch (tag)
{
case SymTagBaseType:
if (!types_get_info(&type, TI_GET_LENGTH, &size64) ||
!types_get_info(&type, TI_GET_BASETYPE, &bt))
{
WINE_ERR("Couldn't get information\n");
RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
}
size = (DWORD)size64;
switch (bt)
{
case btInt:
if (!be_cpu->fetch_integer(lvalue, size, TRUE, &val_int)) return;
dbg_printf("%lld", val_int);
break;
case btUInt:
if (!be_cpu->fetch_integer(lvalue, size, FALSE, &val_int)) return;
dbg_printf("%llu", val_int);
break;
case btFloat:
if (!be_cpu->fetch_float(lvalue, size, &val_real)) return;
dbg_printf("%Lf", val_real);
break;
case btChar:
if (!be_cpu->fetch_integer(lvalue, size, TRUE, &val_int)) return;
/* FIXME: should do the same for a Unicode character (size == 2) */
if (size == 1 && (val_int < 0x20 || val_int > 0x80))
dbg_printf("%d", (int)val_int);
else
dbg_printf("'%c'", (char)val_int);
break;
default:
WINE_FIXME("Unsupported basetype %lu\n", bt);
break;
}
break;
case SymTagPointerType:
if (!memory_read_value(lvalue, sizeof(void*), &val_ptr)) return;
sub_type.module = lvalue->type.module;
if (!types_get_info(&type, TI_GET_TYPE, &sub_type.id) ||
sub_type.id == dbg_itype_none)
{
dbg_printf("Internal symbol error: unable to access memory location %p", val_ptr);
break;
}
if (!types_get_real_type(&sub_type, &tag)) return;
if (types_get_info(&sub_type, TI_GET_SYMTAG, &tag) && tag == SymTagBaseType &&
types_get_info(&sub_type, TI_GET_BASETYPE, &bt) && bt == btChar &&
types_get_info(&sub_type, TI_GET_LENGTH, &size64))
{
char buffer[1024];
if (!val_ptr) dbg_printf("0x0");
else if (memory_get_string(dbg_curr_process, val_ptr,
lvalue->cookie == DLV_TARGET,
size64 == 2, buffer, sizeof(buffer)))
dbg_printf("\"%s\"", buffer);
else
dbg_printf("*** invalid address %p ***", val_ptr);
}
else dbg_printf("%p", val_ptr);
break;
case SymTagArrayType:
case SymTagUDT:
assert(lvalue->cookie == DLV_TARGET);
if (!memory_read_value(lvalue, sizeof(val_ptr), &val_ptr)) return;
dbg_printf("%p", val_ptr);
break;
case SymTagEnum:
{
BOOL ok = FALSE;
assert(lvalue->cookie == DLV_TARGET);
/* FIXME: it depends on underlying type for enums
* (not supported yet in dbghelp)
* Assuming 4 as for an int
*/
if (!be_cpu->fetch_integer(lvalue, 4, TRUE, &val_int)) return;
if (types_get_info(&type, TI_GET_CHILDRENCOUNT, &count))
{
char buffer[sizeof(TI_FINDCHILDREN_PARAMS) + 256 * sizeof(DWORD)];
TI_FINDCHILDREN_PARAMS* fcp = (TI_FINDCHILDREN_PARAMS*)buffer;
WCHAR* ptr;
char tmp[256];
VARIANT variant;
int i;
fcp->Start = 0;
while (count)
{
fcp->Count = min(count, 256);
if (types_get_info(&type, TI_FINDCHILDREN, fcp))
{
sub_type.module = type.module;
for (i = 0; i < min(fcp->Count, count); i++)
{
sub_type.id = fcp->ChildId[i];
if (!types_get_info(&sub_type, TI_GET_VALUE, &variant))
continue;
switch (variant.n1.n2.vt)
{
case VT_I4: ok = (val_int == variant.n1.n2.n3.lVal); break;
default: WINE_FIXME("Unsupported variant type (%u)\n", variant.n1.n2.vt);
}
if (ok)
{
ptr = NULL;
types_get_info(&sub_type, TI_GET_SYMNAME, &ptr);
if (!ptr) continue;
WideCharToMultiByte(CP_ACP, 0, ptr, -1, tmp, sizeof(tmp), NULL, NULL);
HeapFree(GetProcessHeap(), 0, ptr);
dbg_printf("%s", tmp);
count = 0; /* so that we'll get away from outter loop */
break;
}
}
}
}
count -= min(count, 256);
fcp->Start += 256;
}
if (!ok) dbg_printf("%lld", val_int);
}
break;
default:
WINE_FIXME("Unsupported tag %lu\n", tag);
break;
}
}
/***********************************************************************
* print_basic
*
* Implementation of the 'print' command.
*/
void print_basic(const struct dbg_lvalue* lvalue, int count, char format)
{
long int res;
if (lvalue->type.id == dbg_itype_none)
{
dbg_printf("Unable to evaluate expression\n");
return;
}
res = types_extract_as_integer(lvalue);
/* FIXME: this implies i386 byte ordering */
switch (format)
{
case 'x':
if (lvalue->addr.Mode == AddrMode1616 ||
lvalue->addr.Mode == AddrModeReal)
dbg_printf("0x%04lx", res);
else
dbg_printf("0x%08lx", res);
break;
case 'd':
dbg_printf("%ld\n", res);
break;
case 'c':
dbg_printf("%d = '%c'", (char)(res & 0xff), (char)(res & 0xff));
break;
case 'u':
{
WCHAR wch = (WCHAR)(res & 0xFFFF);
dbg_printf("%d = '", wch);
dbg_outputW(&wch, 1);
dbg_printf("'");
}
break;
case 'i':
case 's':
case 'w':
case 'b':
dbg_printf("Format specifier '%c' is meaningless in 'print' command\n", format);
case 0:
if (lvalue->type.id == dbg_itype_segptr)
dbg_printf("%ld", res);
else
print_typed_basic(lvalue);
break;
}
}
void print_bare_address(const ADDRESS* addr)
{
switch (addr->Mode)
{
case AddrModeFlat:
dbg_printf("0x%08lx", addr->Offset);
break;
case AddrModeReal:
case AddrMode1616:
dbg_printf("0x%04x:0x%04lx", addr->Segment, addr->Offset);
break;
case AddrMode1632:
dbg_printf("0x%04x:0x%08lx", addr->Segment, addr->Offset);
break;
default:
dbg_printf("Unknown mode %x\n", addr->Mode);
break;
}
}
/***********************************************************************
* print_address
*
* Print an 16- or 32-bit address, with the nearest symbol if any.
*/
void print_address(const ADDRESS* addr, BOOLEAN with_line)
{
char buffer[sizeof(SYMBOL_INFO) + 256];
SYMBOL_INFO* si = (SYMBOL_INFO*)buffer;
void* lin = memory_to_linear_addr(addr);
DWORD64 disp64;
DWORD disp;
print_bare_address(addr);
si->SizeOfStruct = sizeof(*si);
si->MaxNameLen = 256;
if (!SymFromAddr(dbg_curr_process->handle, (DWORD_PTR)lin, &disp64, si)) return;
dbg_printf(" %s", si->Name);
if (disp64) dbg_printf("+0x%lx", (DWORD_PTR)disp64);
if (with_line)
{
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;
}