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/* Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
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
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
/**
@file storage/perfschema/pfs_global.cc
Miscellaneous global dependencies (implementation).
*/
#include <my_global.h>
#include "pfs_global.h"
#include <my_sys.h>
#include <my_net.h>
#ifdef HAVE_MALLOC_H
#include <malloc.h> /* memalign() may be here */
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef __WIN__
#include <winsock2.h>
#else
#include <arpa/inet.h>
#endif
bool pfs_initialized= false;
size_t pfs_allocated_memory= 0;
/**
Memory allocation for the performance schema.
The memory used internally in the performance schema implementation
is allocated once during startup, and considered static thereafter.
*/
void *pfs_malloc(size_t size, myf flags)
{
DBUG_ASSERT(! pfs_initialized);
DBUG_ASSERT(size > 0);
void *ptr= NULL;
#ifdef PFS_ALIGNEMENT
#ifdef HAVE_POSIX_MEMALIGN
/* Linux */
if (unlikely(posix_memalign(& ptr, PFS_ALIGNEMENT, size)))
return NULL;
#else
#ifdef HAVE_MEMALIGN
/* Solaris */
ptr= memalign(PFS_ALIGNEMENT, size);
if (unlikely(ptr == NULL))
return NULL;
#else
#ifdef HAVE_ALIGNED_MALLOC
/* Windows */
ptr= _aligned_malloc(size, PFS_ALIGNEMENT);
if (unlikely(ptr == NULL))
return NULL;
#else
#error "Missing implementation for PFS_ALIGNENT"
#endif /* HAVE_ALIGNED_MALLOC */
#endif /* HAVE_MEMALIGN */
#endif /* HAVE_POSIX_MEMALIGN */
#else /* PFS_ALIGNMENT */
/* Everything else */
ptr= malloc(size);
if (unlikely(ptr == NULL))
return NULL;
#endif
pfs_allocated_memory+= size;
if (flags & MY_ZEROFILL)
memset(ptr, 0, size);
return ptr;
}
void pfs_free(void *ptr)
{
if (ptr == NULL)
return;
#ifdef HAVE_POSIX_MEMALIGN
/* Allocated with posix_memalign() */
free(ptr);
#else
#ifdef HAVE_MEMALIGN
/* Allocated with memalign() */
free(ptr);
#else
#ifdef HAVE_ALIGNED_MALLOC
/* Allocated with _aligned_malloc() */
_aligned_free(ptr);
#else
/* Allocated with malloc() */
free(ptr);
#endif /* HAVE_ALIGNED_MALLOC */
#endif /* HAVE_MEMALIGN */
#endif /* HAVE_POSIX_MEMALIGN */
}
void pfs_print_error(const char *format, ...)
{
va_list args;
va_start(args, format);
/*
Printing to anything else, like the error log, would generate even more
recursive calls to the performance schema implementation
(file io is instrumented), so that could lead to catastrophic results.
Printing to something safe, and low level: stderr only.
*/
vfprintf(stderr, format, args);
va_end(args);
fflush(stderr);
}
/**
Array allocation for the performance schema.
Checks for overflow of n * size before allocating.
@param n number of array elements
@param size element size
@param flags malloc flags
@return pointer to memory on success, else NULL
*/
void *pfs_malloc_array(size_t n, size_t size, myf flags)
{
DBUG_ASSERT(n > 0);
DBUG_ASSERT(size > 0);
size_t array_size= n * size;
/* Check for overflow before allocating. */
if (is_overflow(array_size, n, size))
return NULL;
return pfs_malloc(array_size, flags);
}
/**
Detect multiplication overflow.
@param product multiplication product
@param n1 operand
@param n2 operand
@return true if multiplication caused an overflow.
*/
bool is_overflow(size_t product, size_t n1, size_t n2)
{
if (n1 != 0 && (product / n1 != n2))
return true;
else
return false;
}
/** Convert raw ip address into readable format. Do not do a reverse DNS lookup. */
uint pfs_get_socket_address(char *host,
uint host_len,
uint *port,
const struct sockaddr_storage *src_addr,
socklen_t src_len)
{
DBUG_ASSERT(host);
DBUG_ASSERT(src_addr);
DBUG_ASSERT(port);
memset(host, 0, host_len);
*port= 0;
switch (src_addr->ss_family)
{
case AF_INET:
{
if (host_len < INET_ADDRSTRLEN+1)
return 0;
struct sockaddr_in *sa4= (struct sockaddr_in *)(src_addr);
#ifdef __WIN__
/* Older versions of Windows do not support inet_ntop() */
getnameinfo((struct sockaddr *)sa4, sizeof(struct sockaddr_in),
host, host_len, NULL, 0, NI_NUMERICHOST);
#else
inet_ntop(AF_INET, &(sa4->sin_addr), host, INET_ADDRSTRLEN);
#endif
*port= ntohs(sa4->sin_port);
}
break;
#ifdef HAVE_IPV6
case AF_INET6:
{
if (host_len < INET6_ADDRSTRLEN+1)
return 0;
struct sockaddr_in6 *sa6= (struct sockaddr_in6 *)(src_addr);
#ifdef __WIN__
/* Older versions of Windows do not support inet_ntop() */
getnameinfo((struct sockaddr *)sa6, sizeof(struct sockaddr_in6),
host, host_len, NULL, 0, NI_NUMERICHOST);
#else
inet_ntop(AF_INET6, &(sa6->sin6_addr), host, INET6_ADDRSTRLEN);
#endif
*port= ntohs(sa6->sin6_port);
}
break;
#endif
default:
break;
}
/* Return actual IP address string length */
return ((uint)strlen((const char*)host));
}
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