Differential D12815 Diff 40474 processor-trace/24982c1a6fce48f1e416461d42899805f74fbb26/libipt/src/pt_block_cache.c
Changeset View
Changeset View
Standalone View
Standalone View
processor-trace/24982c1a6fce48f1e416461d42899805f74fbb26/libipt/src/pt_block_cache.c
Property | Old Value | New Value |
---|---|---|
svn:eol-style | null | native \ No newline at end of property |
svn:keywords | null | FreeBSD=%H \ No newline at end of property |
svn:mime-type | null | text/plain \ No newline at end of property |
/* | |||||
* Copyright (c) 2016-2018, Intel Corporation | |||||
* | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions are met: | |||||
* | |||||
* * Redistributions of source code must retain the above copyright notice, | |||||
* this list of conditions and the following disclaimer. | |||||
* * Redistributions in binary form must reproduce the above copyright notice, | |||||
* this list of conditions and the following disclaimer in the documentation | |||||
* and/or other materials provided with the distribution. | |||||
* * Neither the name of Intel Corporation nor the names of its contributors | |||||
* may be used to endorse or promote products derived from this software | |||||
* without specific prior written permission. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |||||
* POSSIBILITY OF SUCH DAMAGE. | |||||
*/ | |||||
#include "pt_block_cache.h" | |||||
#include <stdlib.h> | |||||
#include <string.h> | |||||
struct pt_block_cache *pt_bcache_alloc(uint64_t nentries) | |||||
{ | |||||
struct pt_block_cache *bcache; | |||||
uint64_t size; | |||||
if (!nentries || (UINT32_MAX < nentries)) | |||||
return NULL; | |||||
size = sizeof(*bcache) + (nentries * sizeof(struct pt_bcache_entry)); | |||||
if (SIZE_MAX < size) | |||||
return NULL; | |||||
bcache = malloc((size_t) size); | |||||
if (!bcache) | |||||
return NULL; | |||||
memset(bcache, 0, (size_t) size); | |||||
bcache->nentries = (uint32_t) nentries; | |||||
return bcache; | |||||
} | |||||
void pt_bcache_free(struct pt_block_cache *bcache) | |||||
{ | |||||
free(bcache); | |||||
} | |||||
int pt_bcache_add(struct pt_block_cache *bcache, uint64_t index, | |||||
struct pt_bcache_entry bce) | |||||
{ | |||||
if (!bcache) | |||||
return -pte_internal; | |||||
if (bcache->nentries <= index) | |||||
return -pte_internal; | |||||
/* We rely on guaranteed atomic operations as specified in section 8.1.1 | |||||
* in Volume 3A of the Intel(R) Software Developer's Manual at | |||||
* http://www.intel.com/sdm. | |||||
*/ | |||||
bcache->entry[(uint32_t) index] = bce; | |||||
return 0; | |||||
} | |||||
int pt_bcache_lookup(struct pt_bcache_entry *bce, | |||||
const struct pt_block_cache *bcache, uint64_t index) | |||||
{ | |||||
if (!bce || !bcache) | |||||
return -pte_internal; | |||||
if (bcache->nentries <= index) | |||||
return -pte_internal; | |||||
/* We rely on guaranteed atomic operations as specified in section 8.1.1 | |||||
* in Volume 3A of the Intel(R) Software Developer's Manual at | |||||
* http://www.intel.com/sdm. | |||||
*/ | |||||
*bce = bcache->entry[(uint32_t) index]; | |||||
return 0; | |||||
} |