generic-library/libzmq
1
0
Fork 0
mirror of https://github.com/zeromq/libzmq.git synced 2025-02-23 07:12:47 +01:00
Code Issues Projects Releases Wiki Activity

Fix alignment of initial chunk in yqueue

Browse Source 
Clang's UndefinedBehaviorSanitizer catches this in the tests.
This commit is contained in:
Brian Silverman 2015-12-17 14:28:15 -05:00
parent 768fc7699e
commit 700b91d102
1 changed files with 14 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
src/yqueue.hpp
View File

@ -67,7 +67,7 @@ namespace zmq
// Create the queue.
inline yqueue_t ()
{
begin_chunk = (chunk_t*) malloc (sizeof (chunk_t));
begin_chunk = allocate_chunk();
alloc_assert (begin_chunk);
begin_pos = 0;
back_chunk = NULL;
@ -121,13 +121,7 @@ namespace zmq
end_chunk->next = sc;
sc->prev = end_chunk;
} else {
#ifdef HAVE_POSIX_MEMALIGN
void *pv;
if (posix_memalign(&pv, ALIGN, sizeof (chunk_t)) == 0)
end_chunk->next = (chunk_t*) pv;
#else
end_chunk->next = (chunk_t*) malloc (sizeof (chunk_t));
#endif
end_chunk->next = allocate_chunk();
alloc_assert (end_chunk->next);
end_chunk->next->prev = end_chunk;
}
@ -193,6 +187,18 @@ namespace zmq
chunk_t *next;
};
inline chunk_t *allocate_chunk ()
{
#ifdef HAVE_POSIX_MEMALIGN
void *pv;
if (posix_memalign(&pv, ALIGN, sizeof (chunk_t)) == 0)
return (chunk_t*) pv;
return NULL;
#else
return (chunk_t*) malloc (sizeof (chunk_t));
#endif
}
// Back position may point to invalid memory if the queue is empty,
// while begin & end positions are always valid. Begin position is
// accessed exclusively be queue reader (front/pop), while back and