mirror of
https://github.com/MariaDB/server.git
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d5e15424d8
The MDEV-29693 conflict resolution is from Monty, as well as is
a bug fix where ANALYZE TABLE wrongly built histograms for
single-column PRIMARY KEY.
Also includes a fix for safe_malloc error reporting.
Other things:
- Copied main.log_slow from 10.4 to avoid mtr issue
Disabled test:
- spider/bugfix.mdev_27239 because we started to get
+Error 1429 Unable to connect to foreign data source: localhost
-Error 1158 Got an error reading communication packets
- main.delayed
- Bug#54332 Deadlock with two connections doing LOCK TABLE+INSERT DELAYED
This part is disabled for now as it fails randomly with different
warnings/errors (no corruption).
101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/* Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
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Copyright (c) 2022, MariaDB Corporation.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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/* Alloc a block of locked memory (memory protected against swap) */
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#include "mysys_priv.h"
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#include "mysys_err.h"
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#include "aligned.h"
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#include <my_list.h>
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#ifdef HAVE_MLOCK
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struct st_mem_list
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{
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LIST list;
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uchar *page;
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uint size;
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};
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LIST *mem_list;
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uchar *my_malloc_lock(size_t size, myf MyFlags)
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{
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int success;
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uint pagesize= my_system_page_size;
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uchar *ptr;
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struct st_mem_list *element;
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DBUG_ENTER("my_malloc_lock");
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size=((size-1) & ~(pagesize-1))+pagesize;
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if (!(ptr=aligned_malloc(size,pagesize)))
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{
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if (MyFlags & (MY_FAE+MY_WME))
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my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_FATAL), size);
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DBUG_RETURN(0);
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}
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success = mlock((uchar*) ptr,size);
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if (success != 0 && geteuid() == 0)
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{
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DBUG_PRINT("warning",("Failed to lock memory. errno %d\n",
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errno));
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fprintf(stderr, "Warning: Failed to lock memory. errno %d\n",
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errno);
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}
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else
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{
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/* Add block in a list for munlock */
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if (!(element=(struct st_mem_list*) my_malloc(sizeof(*element),MyFlags)))
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{
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(void) munlock((uchar*) ptr,size);
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free(ptr);
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DBUG_RETURN(0);
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}
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element->list.data=(uchar*) element;
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element->page=ptr;
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element->size=size;
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mysql_mutex_lock(&THR_LOCK_malloc);
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mem_list=list_add(mem_list,&element->list);
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mysql_mutex_unlock(&THR_LOCK_malloc);
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update_malloc_size((longlong) size, 0);
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}
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DBUG_RETURN(ptr);
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}
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void my_free_lock(uchar *ptr)
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{
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LIST *list;
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struct st_mem_list *element=0;
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mysql_mutex_lock(&THR_LOCK_malloc);
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for (list=mem_list ; list ; list=list->next)
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{
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element=(struct st_mem_list*) list->data;
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if (ptr == element->page)
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{ /* Found locked mem */
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(void) munlock((uchar*) ptr,element->size);
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mem_list=list_delete(mem_list,list);
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update_malloc_size(- (longlong) element->size, 0);
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break;
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}
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}
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mysql_mutex_unlock(&THR_LOCK_malloc);
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my_free(element);
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aligned_free(ptr); /* Free even if not locked */
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}
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#endif /* HAVE_MLOCK */
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