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// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2006 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* define IN_REPLACEMENTS_C before include replacements.h */
#define IN_REPLACEMENTS_C
#include "replacements.h"
#include <stdlib.h>
#include <string.h>
/*
* clear_malloc
*
* will alloc memory and clear it
*/
void *clear_malloc(size_t size)
{
void *t = malloc(size);
if (t)
memset(t, 0x00, size);
return t;
}
void *fill_malloc(size_t size)
{
void *t = malloc(size);
if (t) {
/* We want to initialize memory to some known bad state.
* 0 and 0xff yields 0 and -1 as integers, which often
* have meaningful values. 0x5555... is not often a valid
* integer and is quite easily spotted in the debugger
* also it is almost certainly an invalid address */
memset(t, 0x55, size);
}
return t;
}
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#ifdef _WIN32
#include <io.h>
#include <winsock2.h>
#endif
/* replacements for gettimeofday */
#ifndef HAVE_GETTIMEOFDAY
/* Windows */
#ifdef _WIN32
#ifndef __GNUC__
#define EPOCHFILETIME (116444736000000000i64)
#else
#define EPOCHFILETIME (116444736000000000LL)
#endif
int gettimeofday(struct timeval *tv, struct timezone *tz)
{
FILETIME ft;
LARGE_INTEGER li;
__int64 t;
static int tzflag;
if (tv) {
GetSystemTimeAsFileTime(&ft);
li.LowPart = ft.dwLowDateTime;
li.HighPart = ft.dwHighDateTime;
t = li.QuadPart; /* In 100-nanosecond intervals */
t -= EPOCHFILETIME; /* Offset to the Epoch time */
t /= 10; /* In microseconds */
tv->tv_sec = (long)(t / 1000000);
tv->tv_usec = (long)(t % 1000000);
}
if (tz) {
if (!tzflag) {
_tzset();
tzflag++;
}
tz->tz_minuteswest = _timezone / 60;
tz->tz_dsttime = _daylight;
}
return 0;
}
#endif /* _WIN32 */
#endif /* HAVE_GETTIMEOFDAY */
#ifndef HAVE_STRNLEN
size_t strnlen(const char *s, size_t maxlen)
{
const char *end = (const char *)memchr(s, '\0', maxlen);
return end ? (size_t) (end - s) : maxlen;
}
#endif
#ifndef HAVE_STRNDUP
char *strndup(const char *s, size_t n)
{
size_t len = strnlen(s, n);
char *new = malloc(len + 1);
if (!new)
return NULL;
new[len] = '\0';
return (char *) memcpy(new, s, len);
}
#endif
#ifdef _WIN32
int win_select(int max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv)
{
DWORD ms_total, limit;
HANDLE handles[MAXIMUM_WAIT_OBJECTS];
int handle_slot_to_fd[MAXIMUM_WAIT_OBJECTS];
int n_handles = 0, i;
fd_set sock_read, sock_write, sock_except;
fd_set aread, awrite, aexcept;
int sock_max_fd = -1;
struct timeval tvslice;
int retcode;
#define SAFE_FD_ISSET(fd, set) (set && FD_ISSET(fd, set))
/* calculate how long we need to wait in milliseconds */
if (!tv)
ms_total = INFINITE;
else {
ms_total = tv->tv_sec * 1000;
ms_total += tv->tv_usec / 1000;
}
FD_ZERO(&sock_read);
FD_ZERO(&sock_write);
FD_ZERO(&sock_except);
/* build an array of handles for non-sockets */
for (i = 0; i < max_fd; i++) {
if (SAFE_FD_ISSET(i, rfds) || SAFE_FD_ISSET(i, wfds) || SAFE_FD_ISSET(i, efds)) {
intptr_t handle = (intptr_t) _get_osfhandle(i);
handles[n_handles] = (HANDLE)handle;
if (handles[n_handles] == INVALID_HANDLE_VALUE) {
/* socket */
if (SAFE_FD_ISSET(i, rfds))
FD_SET(i, &sock_read);
if (SAFE_FD_ISSET(i, wfds))
FD_SET(i, &sock_write);
if (SAFE_FD_ISSET(i, efds))
FD_SET(i, &sock_except);
if (i > sock_max_fd)
sock_max_fd = i;
} else {
handle_slot_to_fd[n_handles] = i;
n_handles++;
}
}
}
if (n_handles == 0) {
/* plain sockets only - let winsock handle the whole thing */
return select(max_fd, rfds, wfds, efds, tv);
}
/* mixture of handles and sockets; lets multiplex between
* winsock and waiting on the handles */
FD_ZERO(&aread);
FD_ZERO(&awrite);
FD_ZERO(&aexcept);
limit = GetTickCount() + ms_total;
do {
retcode = 0;
if (sock_max_fd >= 0) {
/* overwrite the zero'd sets here; the select call
* will clear those that are not active */
aread = sock_read;
awrite = sock_write;
aexcept = sock_except;
tvslice.tv_sec = 0;
tvslice.tv_usec = 1000;
retcode = select(sock_max_fd + 1, &aread, &awrite, &aexcept, &tvslice);
}
if (n_handles > 0) {
/* check handles */
DWORD wret;
wret = MsgWaitForMultipleObjects(n_handles,
handles,
FALSE,
retcode > 0 ? 0 : 1,
QS_ALLEVENTS);
if (wret == WAIT_TIMEOUT) {
/* set retcode to 0; this is the default.
* select() may have set it to something else,
* in which case we leave it alone, so this branch
* does nothing */
;
} else if (wret == WAIT_FAILED) {
if (retcode == 0)
retcode = -1;
} else {
if (retcode < 0)
retcode = 0;
for (i = 0; i < n_handles; i++) {
if (WaitForSingleObject(handles[i], 0) == WAIT_OBJECT_0) {
if (SAFE_FD_ISSET(handle_slot_to_fd[i], rfds)) {
DWORD bytes;
intptr_t handle = (intptr_t) _get_osfhandle(
handle_slot_to_fd[i]);
if (PeekNamedPipe((HANDLE)handle, NULL, 0,
NULL, &bytes, NULL)) {
/* check to see if gdb pipe has data available */
if (bytes) {
FD_SET(handle_slot_to_fd[i], &aread);
retcode++;
}
} else {
FD_SET(handle_slot_to_fd[i], &aread);
retcode++;
}
}
if (SAFE_FD_ISSET(handle_slot_to_fd[i], wfds)) {
FD_SET(handle_slot_to_fd[i], &awrite);
retcode++;
}
if (SAFE_FD_ISSET(handle_slot_to_fd[i], efds)) {
FD_SET(handle_slot_to_fd[i], &aexcept);
retcode++;
}
}
}
}
}
} while (retcode == 0 && (ms_total == INFINITE || GetTickCount() < limit));
if (rfds)
*rfds = aread;
if (wfds)
*wfds = awrite;
if (efds)
*efds = aexcept;
return retcode;
}
#endif
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