wine/programs/winedbg/display.c

262 lines
7.8 KiB
C

/*
* File display.c - display handling for Wine internal debugger.
*
* Copyright (C) 1997, Eric Youngdale.
* Copyright (C) 2003, Michal Miroslaw
*
* 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 <stdlib.h>
#include <string.h>
#include "debugger.h"
/* needs to be power of 2, search for MARK to see why :) */
#define DISPTAB_DELTA 8
struct display
{
struct expr* exp;
int count;
char format;
char enabled;
char func_buffer[sizeof(SYMBOL_INFO) + 256];
SYMBOL_INFO* func;
};
static struct display *displaypoints = NULL;
static unsigned int maxdisplays = 0, ndisplays = 0;
#define OFFSET_OF(_f,_s) ((unsigned)(&(((_s*)NULL)->_f)))
static inline BOOL cmp_symbol(const SYMBOL_INFO* si1, const SYMBOL_INFO* si2)
{
/* FIXME: !memcmp(si1, si2, sizeof(SYMBOL_INFO) + si1->NameLen)
* is wrong because sizeof(SYMBOL_INFO) can be aligned on 4-byte boundary
* Note: we also need to zero out the structures before calling
* stack_get_frame, so that un-touched fields by stack_get_frame
* get the same value!!
*/
return !memcmp(si1, si2, OFFSET_OF(Name, SYMBOL_INFO)) &&
!memcmp(si1->Name, si2->Name, si1->NameLen);
}
int display_add(struct expr *exp, int count, char format)
{
unsigned i;
BOOL local_binding = FALSE;
for (i = 0; i < ndisplays; i++)
if (displaypoints[i].exp == NULL)
break;
if (i == maxdisplays)
{
/* no space left - expand */
maxdisplays += DISPTAB_DELTA;
displaypoints = dbg_heap_realloc(displaypoints,
maxdisplays * sizeof(*displaypoints));
}
if (i == ndisplays) ndisplays++;
displaypoints[i].exp = expr_clone(exp, &local_binding);
displaypoints[i].count = count;
displaypoints[i].format = format;
displaypoints[i].enabled = TRUE;
if (local_binding)
{
displaypoints[i].func = (SYMBOL_INFO*)displaypoints[i].func_buffer;
memset(displaypoints[i].func, 0, sizeof(SYMBOL_INFO));
displaypoints[i].func->SizeOfStruct = sizeof(SYMBOL_INFO);
displaypoints[i].func->MaxNameLen = sizeof(displaypoints[i].func_buffer) -
sizeof(*displaypoints[i].func);
if (!stack_get_current_symbol(displaypoints[i].func))
{
expr_free(displaypoints[i].exp);
displaypoints[i].exp = NULL;
return FALSE;
}
}
else displaypoints[i].func = NULL;
return TRUE;
}
int display_info(void)
{
unsigned i;
char buffer[sizeof(SYMBOL_INFO) + 256];
SYMBOL_INFO* func;
const char* info;
func = (SYMBOL_INFO*)buffer;
memset(func, 0, sizeof(SYMBOL_INFO));
func->SizeOfStruct = sizeof(SYMBOL_INFO);
func->MaxNameLen = sizeof(buffer) - sizeof(*func);
if (!stack_get_current_symbol(func)) return FALSE;
for (i = 0; i < ndisplays; i++)
{
if (displaypoints[i].exp == NULL) continue;
dbg_printf("%d: ", i + 1);
expr_print(displaypoints[i].exp);
if (displaypoints[i].enabled)
{
if (displaypoints[i].func && !cmp_symbol(displaypoints[i].func, func))
info = " (out of scope)";
else
info = "";
}
else
info = " (disabled)";
if (displaypoints[i].func)
dbg_printf(" in %s", displaypoints[i].func->Name);
dbg_printf("%s\n", info);
}
return TRUE;
}
static void print_one_display(int i)
{
struct dbg_lvalue lvalue;
if (displaypoints[i].enabled)
{
lvalue = expr_eval(displaypoints[i].exp);
if (lvalue.type.id == dbg_itype_none)
{
dbg_printf("Unable to evaluate expression ");
expr_print(displaypoints[i].exp);
dbg_printf("\nDisabling display %d ...\n", i + 1);
displaypoints[i].enabled = FALSE;
return;
}
}
dbg_printf("%d: ", i + 1);
expr_print(displaypoints[i].exp);
dbg_printf(" = ");
if (!displaypoints[i].enabled)
dbg_printf("(disabled)\n");
else
if (displaypoints[i].format == 'i')
memory_examine(&lvalue, displaypoints[i].count, displaypoints[i].format);
else
print_value(&lvalue, displaypoints[i].format, 0);
}
int display_print(void)
{
unsigned i;
char buffer[sizeof(SYMBOL_INFO) + 256];
SYMBOL_INFO* func;
func = (SYMBOL_INFO*)buffer;
memset(func, 0, sizeof(SYMBOL_INFO));
func->SizeOfStruct = sizeof(SYMBOL_INFO);
func->MaxNameLen = sizeof(buffer) - sizeof(*func);
if (!stack_get_current_symbol(func)) return FALSE;
for (i = 0; i < ndisplays; i++)
{
if (displaypoints[i].exp == NULL || !displaypoints[i].enabled)
continue;
if (displaypoints[i].func && !cmp_symbol(displaypoints[i].func, func))
continue;
print_one_display(i);
}
return TRUE;
}
int display_delete(int displaynum)
{
if (displaynum > ndisplays || displaynum == 0 || displaynum < -1 ||
displaypoints[displaynum - 1].exp == NULL)
{
dbg_printf("Invalid display number\n");
return TRUE;
}
if (displaynum == -1)
{
unsigned i;
for (i = 0; i < ndisplays; i++)
{
if (displaypoints[i].exp != NULL)
{
expr_free(displaypoints[i].exp);
displaypoints[i].exp = NULL;
}
}
maxdisplays = DISPTAB_DELTA;
displaypoints = dbg_heap_realloc(displaypoints,
(maxdisplays = DISPTAB_DELTA) * sizeof(*displaypoints));
ndisplays = 0;
}
else if (displaypoints[--displaynum].exp != NULL)
{
expr_free(displaypoints[displaynum].exp);
displaypoints[displaynum].exp = NULL;
while (displaynum == ndisplays - 1 && displaypoints[displaynum].exp == NULL)
{
--ndisplays;
--displaynum;
}
if (maxdisplays - ndisplays >= 2 * DISPTAB_DELTA)
{
/* MARK */
maxdisplays = (ndisplays + DISPTAB_DELTA - 1) & ~(DISPTAB_DELTA - 1);
displaypoints = dbg_heap_realloc(displaypoints,
maxdisplays * sizeof(*displaypoints));
}
}
return TRUE;
}
int display_enable(int displaynum, int enable)
{
char buffer[sizeof(SYMBOL_INFO) + 256];
SYMBOL_INFO* func;
func = (SYMBOL_INFO*)buffer;
memset(func, 0, sizeof(SYMBOL_INFO));
func->SizeOfStruct = sizeof(SYMBOL_INFO);
func->MaxNameLen = sizeof(buffer) - sizeof(*func);
if (!stack_get_current_symbol(func)) return FALSE;
--displaynum;
if (displaynum >= ndisplays || displaynum < 0 ||
displaypoints[displaynum].exp == NULL)
{
dbg_printf("Invalid display number\n");
return TRUE;
}
displaypoints[displaynum].enabled = enable;
if (!displaypoints[displaynum].func ||
cmp_symbol(displaypoints[displaynum].func, func))
{
print_one_display(displaynum);
}
return TRUE;
}