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wine/programs/winedbg/types.c
Eric Pouech 5fe480b472 - fixed regression in ctrl-c handling 
- fixed regression in 'info symbol XXXX' command (and enhanced
  presentation)
- fixed regression in line stepping
- fixed regression in & (address operator) handling
- fixed some bad module reference for local symbols
- enhanced register presentation as local variables
- added warning when launching a debuggee which isn't a Wine app
- removed the 'local' extension of display command (and check when
  setting the display whether the expr has a local binding)
- simplified exception handling, and factorized some code when
  debugger stops
2004-09-28 02:13:27 +00:00

732 lines
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/*
* File types.c - datatype handling stuff for internal debugger.
*
* Copyright (C) 1997, Eric Youngdale.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Note: This really doesn't do much at the moment, but it forms the framework
* upon which full support for datatype handling will eventually be built.
*/
#include "config.h"
#include <stdlib.h>
#include "debugger.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
/******************************************************************
* types_extract_as_integer
*
* Given a lvalue, try to get an integral (or pointer/address) value
* out of it
*/
long int types_extract_as_integer(const struct dbg_lvalue* lvalue)
{
long int rtn = 0;
DWORD tag, size, bt;
if (lvalue->type.id == dbg_itype_none ||
!types_get_info(&lvalue->type, TI_GET_SYMTAG, &tag))
return 0;
switch (tag)
{
case SymTagBaseType:
if (!types_get_info(&lvalue->type, TI_GET_LENGTH, &size) ||
!types_get_info(&lvalue->type, TI_GET_BASETYPE, &bt))
{
WINE_ERR("Couldn't get information\n");
RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
}
if (size > sizeof(rtn))
{
WINE_ERR("Size too large (%lu)\n", size);
return 0;
}
/* FIXME: we have an ugly & non portable thing here !!! */
if (!memory_read_value(lvalue, size, &rtn)) return 0;
/* now let's do some promotions !! */
switch (bt)
{
case btInt:
/* propagate sign information */
if (((size & 3) != 0) && (rtn >> (size * 8 - 1)) != 0)
rtn |= (-1) << (size * 8);
break;
case btUInt:
case btChar:
break;
case btFloat:
RaiseException(DEBUG_STATUS_NOT_AN_INTEGER, 0, 0, NULL);
}
break;
case SymTagPointerType:
if (!memory_read_value(lvalue, sizeof(void*), &rtn)) return 0;
break;
case SymTagArrayType:
case SymTagUDT:
assert(lvalue->cookie == DLV_TARGET);
if (!memory_read_value(lvalue, sizeof(rtn), &rtn)) return 0;
break;
case SymTagEnum:
assert(lvalue->cookie == DLV_TARGET);
if (!memory_read_value(lvalue, sizeof(rtn), &rtn)) return 0;
break;
default:
WINE_FIXME("Unsupported tag %lu\n", tag);
rtn = 0;
break;
}
return rtn;
}
/******************************************************************
* types_deref
*
*/
BOOL types_deref(const struct dbg_lvalue* lvalue, struct dbg_lvalue* result)
{
DWORD tag;
memset(result, 0, sizeof(*result));
result->type.id = dbg_itype_none;
result->type.module = 0;
/*
* Make sure that this really makes sense.
*/
if (!types_get_info(&lvalue->type, TI_GET_SYMTAG, &tag) ||
tag != SymTagPointerType ||
memory_read_value(lvalue, sizeof(result->addr.Offset), &result->addr.Offset) ||
!types_get_info(&lvalue->type, TI_GET_TYPE, &result->type.id))
return FALSE;
result->type.module = lvalue->type.module;
result->cookie = DLV_TARGET;
/* FIXME: this is currently buggy.
* there is no way to tell were the deref:ed value is...
* for example:
* x is a pointer to struct s, x being on the stack
* => lvalue is in debuggee, result is in debugger
* x is a pointer to struct s, x being optimized into a reg
* => lvalue is debugger, result is debuggee
* x is a pointer to internal variable x
* => lvalue is debugger, result is debuggee
* so we force debuggee address space, because dereferencing pointers to
* internal variables is very unlikely. A correct fix would be
* rather large.
*/
result->addr.Mode = AddrModeFlat;
return TRUE;
}
/******************************************************************
* types_get_udt_element_lvalue
*
* Implement a structure derefencement
*/
static BOOL types_get_udt_element_lvalue(struct dbg_lvalue* lvalue,
const struct dbg_type* type, long int* tmpbuf)
{
DWORD offset, length, bitoffset;
DWORD bt;
unsigned mask;
types_get_info(type, TI_GET_TYPE, &lvalue->type.id);
lvalue->type.module = type->module;
types_get_info(type, TI_GET_OFFSET, &offset);
if (types_get_info(type, TI_GET_BITPOSITION, &bitoffset))
{
types_get_info(type, TI_GET_LENGTH, &length);
if (length > sizeof(*tmpbuf)) return FALSE;
/*
* Bitfield operation. We have to extract the field and store
* it in a temporary buffer so that we get it all right.
*/
lvalue->addr.Offset += offset;
if (!memory_read_value(lvalue, sizeof(*tmpbuf), tmpbuf)) return FALSE;
mask = 0xffffffff << length;
*tmpbuf >>= bitoffset & 7;
*tmpbuf &= ~mask;
lvalue->cookie = DLV_HOST;
lvalue->addr.Offset = (DWORD)tmpbuf;
/*
* OK, now we have the correct part of the number.
* Check to see whether the basic type is signed or not, and if so,
* we need to sign extend the number.
*/
if (types_get_info(&lvalue->type, TI_GET_BASETYPE, &bt) &&
bt == btInt && (*tmpbuf & (1 << (length - 1))))
{
*tmpbuf |= mask;
}
return TRUE;
}
if (types_get_info(type, TI_GET_OFFSET, &offset))
{
lvalue->addr.Offset += offset;
return TRUE;
}
return FALSE;
}
/******************************************************************
* types_udt_find_element
*
*/
BOOL types_udt_find_element(struct dbg_lvalue* lvalue, const char* name, long int* tmpbuf)
{
DWORD tag, count;
char buffer[sizeof(TI_FINDCHILDREN_PARAMS) + 256 * sizeof(DWORD)];
TI_FINDCHILDREN_PARAMS* fcp = (TI_FINDCHILDREN_PARAMS*)buffer;
WCHAR* ptr;
char tmp[256];
int i;
struct dbg_type type;
if (!types_get_info(&lvalue->type, TI_GET_SYMTAG, &tag) ||
tag != SymTagUDT)
return FALSE;
if (types_get_info(&lvalue->type, TI_GET_CHILDRENCOUNT, &count))
{
fcp->Start = 0;
while (count)
{
fcp->Count = min(count, 256);
if (types_get_info(&lvalue->type, TI_FINDCHILDREN, fcp))
{
type.module = lvalue->type.module;
for (i = 0; i < min(fcp->Count, count); i++)
{
ptr = NULL;
type.id = fcp->ChildId[i];
types_get_info(&type, TI_GET_SYMNAME, &ptr);
if (!ptr) continue;
WideCharToMultiByte(CP_ACP, 0, ptr, -1, tmp, sizeof(tmp), NULL, NULL);
HeapFree(GetProcessHeap(), 0, ptr);
if (strcmp(tmp, name)) continue;
return types_get_udt_element_lvalue(lvalue, &type, tmpbuf);
}
}
count -= min(count, 256);
fcp->Start += 256;
}
}
return FALSE;
}
/******************************************************************
* types_array_index
*
* Grab an element from an array
*/
BOOL types_array_index(const struct dbg_lvalue* lvalue, int index,
struct dbg_lvalue* result)
{
DWORD tag, length, count;
if (!types_get_info(&lvalue->type, TI_GET_SYMTAG, &tag))
return FALSE;
switch (tag)
{
case SymTagArrayType:
types_get_info(&lvalue->type, TI_GET_COUNT, &count);
if (index < 0 || index >= count) return FALSE;
/* fall through */
case SymTagPointerType:
/*
* Get the base type, so we know how much to index by.
*/
types_get_info(&lvalue->type, TI_GET_TYPE, &result->type.id);
result->type.module = lvalue->type.module;
types_get_info(&result->type, TI_GET_LENGTH, &length);
/* Contents of array must be on same target */
result->addr.Mode = lvalue->addr.Mode;
memory_read_value(lvalue, sizeof(result->addr.Offset), &result->addr.Offset);
result->addr.Offset += index * length;
break;
default:
assert(FALSE);
}
return TRUE;
}
struct type_find_t
{
unsigned long result; /* out: the found type */
enum SymTagEnum tag; /* in: the tag to look for */
union
{
unsigned long typeid; /* when tag is SymTagUDT */
const char* name; /* when tag is SymTagPointerType */
} u;
};
static BOOL CALLBACK types_cb(PSYMBOL_INFO sym, ULONG size, void* _user)
{
struct type_find_t* user = (struct type_find_t*)_user;
BOOL ret = TRUE;
struct dbg_type type;
DWORD type_id;
if (sym->Tag == user->tag)
{
switch (user->tag)
{
case SymTagUDT:
if (!strcmp(user->u.name, sym->Name))
{
user->result = sym->TypeIndex;
ret = FALSE;
}
break;
case SymTagPointerType:
type.module = sym->ModBase;
type.id = sym->TypeIndex;
types_get_info(&type, TI_GET_TYPE, &type_id);
if (types_get_info(&type, TI_GET_TYPE, &type_id) && type_id == user->u.typeid)
{
user->result = sym->TypeIndex;
ret = FALSE;
}
break;
default: break;
}
}
return ret;
}
/******************************************************************
* types_find_pointer
*
* Should look up in module based at linear whether (typeid*) exists
* Otherwise, we could create it locally
*/
struct dbg_type types_find_pointer(const struct dbg_type* type)
{
struct type_find_t f;
struct dbg_type ret;
f.result = dbg_itype_none;
f.tag = SymTagPointerType;
f.u.typeid = type->id;
SymEnumTypes(dbg_curr_process->handle, type->module, types_cb, &f);
ret.module = type->module;
ret.id = f.result;
return ret;
}
/******************************************************************
* types_find_type
*
* Should look up in the module based at linear address whether a type
* named 'name' and with the correct tag exists
*/
struct dbg_type types_find_type(unsigned long linear, const char* name, enum SymTagEnum tag)
{
struct type_find_t f;
struct dbg_type ret;
f.result = dbg_itype_none;
f.tag = tag;
f.u.name = name;
SymEnumTypes(dbg_curr_process->handle, linear, types_cb, &f);
ret.module = linear;
ret.id = f.result;
return ret;
}
/***********************************************************************
* print_value
*
* Implementation of the 'print' command.
*/
void print_value(const struct dbg_lvalue* lvalue, char format, int level)
{
struct dbg_lvalue lvalue_field;
int i;
DWORD tag;
DWORD count;
DWORD size;
if (lvalue->type.id == dbg_itype_none)
{
/* No type, just print the addr value */
print_bare_address(&lvalue->addr);
goto leave;
}
if (format == 'i' || format == 's' || format == 'w' || format == 'b' || format == 'g')
{
dbg_printf("Format specifier '%c' is meaningless in 'print' command\n", format);
format = '\0';
}
if (!types_get_info(&lvalue->type, TI_GET_SYMTAG, &tag))
{
WINE_FIXME("---error\n");
return;
}
switch (tag)
{
case SymTagBaseType:
case SymTagEnum:
case SymTagPointerType:
print_basic(lvalue, 1, format);
break;
case SymTagUDT:
if (types_get_info(&lvalue->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];
long int tmpbuf;
struct dbg_type type;
dbg_printf("{");
fcp->Start = 0;
while (count)
{
fcp->Count = min(count, 256);
if (types_get_info(&lvalue->type, TI_FINDCHILDREN, fcp))
{
for (i = 0; i < min(fcp->Count, count); i++)
{
ptr = NULL;
type.module = lvalue->type.module;
type.id = fcp->ChildId[i];
types_get_info(&type, TI_GET_SYMNAME, &ptr);
if (!ptr) continue;
WideCharToMultiByte(CP_ACP, 0, ptr, -1, tmp, sizeof(tmp), NULL, NULL);
dbg_printf("%s=", tmp);
HeapFree(GetProcessHeap(), 0, ptr);
lvalue_field = *lvalue;
if (types_get_udt_element_lvalue(&lvalue_field, &type, &tmpbuf))
{
print_value(&lvalue_field, format, level + 1);
}
if (i < min(fcp->Count, count) - 1 || count > 256) dbg_printf(", ");
}
}
count -= min(count, 256);
fcp->Start += 256;
}
dbg_printf("}");
}
break;
case SymTagArrayType:
/*
* Loop over all of the entries, printing stuff as we go.
*/
count = 1; size = 1;
types_get_info(&lvalue->type, TI_GET_COUNT, &count);
types_get_info(&lvalue->type, TI_GET_LENGTH, &size);
if (size == count)
{
unsigned len;
char buffer[256];
/*
* Special handling for character arrays.
*/
/* FIXME should check basic type here (should be a char!!!!)... */
len = min(count, sizeof(buffer));
memory_get_string(dbg_curr_process->handle,
memory_to_linear_addr(&lvalue->addr),
lvalue->cookie == DLV_TARGET, TRUE, buffer, len);
dbg_printf("\"%s%s\"", buffer, (len < count) ? "..." : "");
break;
}
lvalue_field = *lvalue;
types_get_info(&lvalue->type, TI_GET_TYPE, &lvalue_field.type.id);
dbg_printf("{");
for (i = 0; i < count; i++)
{
print_value(&lvalue_field, format, level + 1);
lvalue_field.addr.Offset += size / count;
dbg_printf((i == count - 1) ? "}" : ", ");
}
break;
case SymTagFunctionType:
dbg_printf("Function ");
print_bare_address(&lvalue->addr);
dbg_printf(": ");
types_print_type(&lvalue->type, FALSE);
break;
default:
WINE_FIXME("Unknown tag (%lu)\n", tag);
RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
break;
}
leave:
if (level == 0) dbg_printf("\n");
}
static BOOL CALLBACK print_types_cb(PSYMBOL_INFO sym, ULONG size, void* ctx)
{
struct dbg_type type;
type.module = sym->ModBase;
type.id = sym->TypeIndex;
dbg_printf("Mod: %08lx ID: %08lx \n", type.module, type.id);
types_print_type(&type, TRUE);
dbg_printf("\n");
return TRUE;
}
static BOOL CALLBACK print_types_mod_cb(PSTR mod_name, DWORD base, void* ctx)
{
return SymEnumTypes(dbg_curr_process->handle, base, print_types_cb, ctx);
}
int print_types(void)
{
SymEnumerateModules(dbg_curr_process->handle, print_types_mod_cb, NULL);
return 0;
}
int types_print_type(const struct dbg_type* type, BOOL details)
{
WCHAR* ptr;
char tmp[256];
const char* name;
DWORD tag, udt, count;
struct dbg_type subtype;
if (type->id == dbg_itype_none || !types_get_info(type, TI_GET_SYMTAG, &tag))
{
dbg_printf("--invalid--<%lxh>--", type->id);
return FALSE;
}
if (types_get_info(type, TI_GET_SYMNAME, &ptr) && ptr)
{
WideCharToMultiByte(CP_ACP, 0, ptr, -1, tmp, sizeof(tmp), NULL, NULL);
name = tmp;
HeapFree(GetProcessHeap(), 0, ptr);
}
else name = "--none--";
switch (tag)
{
case SymTagBaseType:
if (details) dbg_printf("Basic<%s>", name); else dbg_printf("%s", name);
break;
case SymTagPointerType:
types_get_info(type, TI_GET_TYPE, &subtype.id);
subtype.module = type->module;
types_print_type(&subtype, FALSE);
dbg_printf("*");
break;
case SymTagUDT:
types_get_info(type, TI_GET_UDTKIND, &udt);
switch (udt)
{
case UdtStruct: dbg_printf("struct %s", name); break;
case UdtUnion: dbg_printf("union %s", name); break;
case UdtClass: dbg_printf("class %s", name); break;
default: WINE_ERR("Unsupported UDT type (%ld) for %s", udt, name); break;
}
if (details &&
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];
int i;
struct dbg_type type_elt;
dbg_printf(" {");
fcp->Start = 0;
while (count)
{
fcp->Count = min(count, 256);
if (types_get_info(type, TI_FINDCHILDREN, fcp))
{
for (i = 0; i < min(fcp->Count, count); i++)
{
ptr = NULL;
type_elt.module = type->module;
type_elt.id = fcp->ChildId[i];
types_get_info(&type_elt, 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);
if (types_get_info(&type_elt, TI_GET_TYPE, &type_elt.id))
{
dbg_printf(":");
types_print_type(&type_elt, details);
}
if (i < min(fcp->Count, count) - 1 || count > 256) dbg_printf(", ");
}
}
count -= min(count, 256);
fcp->Start += 256;
}
dbg_printf("}");
}
break;
case SymTagArrayType:
types_get_info(type, TI_GET_TYPE, &subtype.id);
subtype.module = type->module;
types_print_type(&subtype, details);
dbg_printf(" %s[]", name);
break;
case SymTagEnum:
dbg_printf("enum %s", name);
break;
case SymTagFunctionType:
types_get_info(type, TI_GET_TYPE, &subtype.id);
subtype.module = type->module;
types_print_type(&subtype, FALSE);
dbg_printf(" (*%s)(", name);
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;
int i;
fcp->Start = 0;
while (count)
{
fcp->Count = min(count, 256);
if (types_get_info(type, TI_FINDCHILDREN, fcp))
{
for (i = 0; i < min(fcp->Count, count); i++)
{
subtype.id = fcp->ChildId[i];
types_print_type(&subtype, FALSE);
if (i < min(fcp->Count, count) - 1 || count > 256) dbg_printf(", ");
}
}
count -= min(count, 256);
fcp->Start += 256;
}
}
dbg_printf(")");
break;
default:
WINE_ERR("Unknown type %lu for %s\n", tag, name);
break;
}
return TRUE;
}
BOOL types_get_info(const struct dbg_type* type, IMAGEHLP_SYMBOL_TYPE_INFO ti, void* pInfo)
{
if (type->id == dbg_itype_none) return FALSE;
if (type->module != 0)
return SymGetTypeInfo(dbg_curr_process->handle, type->module, type->id, ti, pInfo);
assert(type->id >= dbg_itype_first);
/* helper to typecast pInfo to its expected type (_t) */
#define X(_t) (*((_t*)pInfo))
switch (type->id)
{
case dbg_itype_unsigned_int:
switch (ti)
{
case TI_GET_SYMTAG: X(DWORD) = SymTagBaseType; break;
case TI_GET_LENGTH: X(DWORD) = 4; break;
case TI_GET_BASETYPE: X(DWORD) = btUInt; break;
default: WINE_FIXME("unsupported %u for u-int\n", ti); return FALSE;
}
break;
case dbg_itype_signed_int:
switch (ti)
{
case TI_GET_SYMTAG: X(DWORD) = SymTagBaseType; break;
case TI_GET_LENGTH: X(DWORD) = 4; break;
case TI_GET_BASETYPE: X(DWORD) = btInt; break;
default: WINE_FIXME("unsupported %u for s-int\n", ti); return FALSE;
}
break;
case dbg_itype_unsigned_short_int:
switch (ti)
{
case TI_GET_SYMTAG: X(DWORD) = SymTagBaseType; break;
case TI_GET_LENGTH: X(DWORD) = 2; break;
case TI_GET_BASETYPE: X(DWORD) = btUInt; break;
default: WINE_FIXME("unsupported %u for u-short int\n", ti); return FALSE;
}
break;
case dbg_itype_signed_short_int:
switch (ti)
{
case TI_GET_SYMTAG: X(DWORD) = SymTagBaseType; break;
case TI_GET_LENGTH: X(DWORD) = 2; break;
case TI_GET_BASETYPE: X(DWORD) = btInt; break;
default: WINE_FIXME("unsupported %u for s-short int\n", ti); return FALSE;
}
break;
case dbg_itype_unsigned_char_int:
switch (ti)
{
case TI_GET_SYMTAG: X(DWORD) = SymTagBaseType; break;
case TI_GET_LENGTH: X(DWORD) = 1; break;
case TI_GET_BASETYPE: X(DWORD) = btUInt; break;
default: WINE_FIXME("unsupported %u for u-char int\n", ti); return FALSE;
}
break;
case dbg_itype_signed_char_int:
switch (ti)
{
case TI_GET_SYMTAG: X(DWORD) = SymTagBaseType; break;
case TI_GET_LENGTH: X(DWORD) = 1; break;
case TI_GET_BASETYPE: X(DWORD) = btInt; break;
default: WINE_FIXME("unsupported %u for s-char int\n", ti); return FALSE;
}
break;
case dbg_itype_char:
switch (ti)
{
case TI_GET_SYMTAG: X(DWORD) = SymTagBaseType; break;
case TI_GET_LENGTH: X(DWORD) = 1; break;
case TI_GET_BASETYPE: X(DWORD) = btChar; break;
default: WINE_FIXME("unsupported %u for char int\n", ti); return FALSE;
}
break;
case dbg_itype_astring:
switch (ti)
{
case TI_GET_SYMTAG: X(DWORD) = SymTagPointerType; break;
case TI_GET_LENGTH: X(DWORD) = 4; break;
case TI_GET_TYPE: X(DWORD) = dbg_itype_char; break;
default: WINE_FIXME("unsupported %u for a string\n", ti); return FALSE;
}
break;
default: WINE_FIXME("unsupported type id 0x%lx\n", type->id);
}
#undef X
return TRUE;
}
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