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/*********************************************************
* Copyright (C) 2009 VMware, Inc. All rights reserved.
*
* This program 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 version 2.1 and no later version.
*
* This program 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 Lesser GNU General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
*********************************************************/
/*
* utilMem.c --
*
* misc util functions
*/
#ifdef _WIN32
#include <windows.h>
#endif
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include "vm_assert.h"
/*
*-----------------------------------------------------------------------------
*
* Util_SafeInternalMalloc --
* Helper function for malloc
*
* Results:
* Pointer to the dynamically allocated memory.
*
* Side effects:
* May Panic if ran out of memory.
*
*-----------------------------------------------------------------------------
*/
void *
Util_SafeInternalMalloc(int bugNumber, // IN:
size_t size, // IN:
const char *file, // IN:
int lineno) // IN:
{
void *result = malloc(size);
if (result == NULL && size != 0) {
if (bugNumber == -1) {
Panic("Unrecoverable memory allocation failure at %s:%d\n",
file, lineno);
} else {
Panic("Unrecoverable memory allocation failure at %s:%d. Bug "
"number: %d\n", file, lineno, bugNumber);
}
}
return result;
}
/*
*-----------------------------------------------------------------------------
*
* Util_SafeInternalRealloc --
* Helper function for realloc
*
* Results:
* Pointer to the dynamically allocated memory.
*
* Side effects:
* May Panic if ran out of memory.
*
*-----------------------------------------------------------------------------
*/
void *
Util_SafeInternalRealloc(int bugNumber, // IN:
void *ptr, // IN:
size_t size, // IN:
const char *file, // IN:
int lineno) // IN:
{
void *result = realloc(ptr, size);
if (result == NULL && size != 0) {
if (bugNumber == -1) {
Panic("Unrecoverable memory allocation failure at %s:%d\n",
file, lineno);
} else {
Panic("Unrecoverable memory allocation failure at %s:%d. Bug "
"number: %d\n", file, lineno, bugNumber);
}
}
return result;
}
/*
*-----------------------------------------------------------------------------
*
* Util_SafeInternalCalloc --
* Helper function for calloc
*
* Results:
* Pointer to the dynamically allocated memory.
*
* Side effects:
* May Panic if ran out of memory.
*
*-----------------------------------------------------------------------------
*/
void *
Util_SafeInternalCalloc(int bugNumber, // IN:
size_t nmemb, // IN:
size_t size, // IN:
const char *file, // IN:
int lineno) // IN:
{
void *result = calloc(nmemb, size);
if (result == NULL && nmemb != 0 && size != 0) {
if (bugNumber == -1) {
Panic("Unrecoverable memory allocation failure at %s:%d\n",
file, lineno);
} else {
Panic("Unrecoverable memory allocation failure at %s:%d. Bug "
"number: %d\n", file, lineno, bugNumber);
}
}
return result;
}
/*
*-----------------------------------------------------------------------------
*
* Util_SafeInternalStrdup --
* Helper function for strdup
*
* Results:
* Pointer to the dynamically allocated, duplicate string
*
* Side effects:
* May Panic if ran out of memory.
*
*-----------------------------------------------------------------------------
*/
char *
Util_SafeInternalStrdup(int bugNumber, // IN:
const char *s, // IN:
const char *file, // IN:
int lineno) // IN:
{
char *result;
if (s == NULL) {
return NULL;
}
#if defined(_WIN32)
if ((result = _strdup(s)) == NULL) {
#else
if ((result = strdup(s)) == NULL) {
#endif
if (bugNumber == -1) {
Panic("Unrecoverable memory allocation failure at %s:%d\n",
file, lineno);
} else {
Panic("Unrecoverable memory allocation failure at %s:%d. Bug "
"number: %d\n", file, lineno, bugNumber);
}
}
return result;
}
/*
*-----------------------------------------------------------------------------
*
* UtilSafeStrndupInternal --
*
* Returns a string consisting of first n characters of 's' if 's' has
* length >= 'n', otherwise returns a string duplicate of 's'.
*
* Results:
* Pointer to the duplicated string.
*
* Side effects:
* May Panic if ran out of memory.
*
*-----------------------------------------------------------------------------
*/
char *
Util_SafeInternalStrndup(int bugNumber, // IN:
const char *s, // IN:
size_t n, // IN:
const char *file, // IN:
int lineno) // IN:
{
size_t size;
char *copy;
const char *null;
if (s == NULL) {
return NULL;
}
null = (char *) memchr(s, '\0', n);
size = null ? null - s: n;
copy = (char *) malloc(size + 1);
if (copy == NULL) {
if (bugNumber == -1) {
Panic("Unrecoverable memory allocation failure at %s:%d\n",
file, lineno);
} else {
Panic("Unrecoverable memory allocation failure at %s:%d. Bug "
"number: %d\n", file, lineno, bugNumber);
}
}
copy[size] = '\0';
return (char *) memcpy(copy, s, size);
}
void *
Util_Memcpy(void *dest,
const void *src,
size_t count)
{
uintptr_t align = ((uintptr_t)dest | (uintptr_t)src | count);
#if defined __GNUC__
#if defined(__x86_64__)
size_t dummy0;
void *dummy1;
void *dummy2;
if ((align & 7) == 0) {
__asm__ __volatile__("\t"
"cld" "\n\t"
"rep ; movsq" "\n"
: "=c" (dummy0), "=D" (dummy1), "=S" (dummy2)
: "0" (count >> 3), "1" (dest), "2" (src)
: "memory", "cc"
);
return dest;
} else if ((align & 3) == 0) {
__asm__ __volatile__("\t"
"cld" "\n\t"
"rep ; movsd" "\n"
: "=c" (dummy0), "=D" (dummy1), "=S" (dummy2)
: "0" (count >> 2), "1" (dest), "2" (src)
: "memory", "cc"
);
return dest;
}
#elif defined(__i386__)
size_t dummy0;
void *dummy1;
void *dummy2;
if ((align & 3) == 0) {
__asm__ __volatile__("\t"
"cld" "\n\t"
"rep ; movsd" "\n"
: "=c" (dummy0), "=D" (dummy1), "=S" (dummy2)
: "0" (count >> 2), "1" (dest), "2" (src)
: "memory", "cc"
);
return dest;
}
#endif
#elif defined _MSC_VER
#if defined(__x86_64__)
if ((align & 7) == 0) {
__movsq((uint64 *)dest, (uint64 *)src, count >> 3);
return dest;
} else if ((align & 3) == 0) {
__movsd((unsigned long *)dest, (unsigned long *)src, count >> 2);
return dest;
}
#elif defined(__i386__)
if ((((uintptr_t)dest | (uintptr_t)src | count) & 3) == 0) {
__movsd((unsigned long *)dest, (unsigned long *)src, count >> 2);
return dest;
}
#endif
#endif
memcpy(dest, src, count);
return dest;
}
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