<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">On Nov 16, 2015, at 1:10 AM, 吴降龙 <<a href="mailto:magickid2001@163.com" class="">magickid2001@163.com</a>> wrote:<div class=""><blockquote type="cite" class=""><div class=""><div style="line-height: 1.7; font-size: 14px; font-family: Arial;" class="">How can I check whether any given address was allocated by jemalloc? Is that possible?</div></div></blockquote></div><br class=""><div class="">If you configure with --enable-ivsalloc, malloc_usable_size() and sallocx() will return 0 for addresses not managed by jemalloc. Without --enable-ivsalloc, these functions have undefined behavior (crashes are common) for addresses not managed by jemalloc.</div><div class=""><br class=""></div><div class="">Jason</div></body></html>