|
Hello! We are using websockets on naviserver. After connections are established, we create a callback for the read event with ns_sockcallback and push them in the background with ns_chan. We hit a limit of exactly 100 connections, which went away, when we commented out the ns_sockcallback call. The problem is an invalid memory allocation. I've attached a patch, which allows us to open much more connections, although we still get a memory corruption at around 1000 connections, somtimes more, sometimes less. TCL is compiled with Gustaf Neumanns memory allocator path. This is the backtrace with the linux standard memory allocator *** glibc detected *** /usr/local/naviserver/bin/nsd: malloc(): memory corruption: 0x000000000b371b60 *** ======= Backtrace: ========= /lib/libc.so.6(+0x71e16)[0x7f9de5cf5e16] /lib/libc.so.6(+0x74ead)[0x7f9de5cf8ead] /lib/libc.so.6(__libc_malloc+0x70)[0x7f9de5cfac70] /usr/local/lib/libtcl8.5.so(Tcl_Alloc+0x15)[0x7f9de64b8475] /usr/local/lib/libtcl8.5.so(+0xafdf2)[0x7f9de652ddf2] /usr/local/lib/libtcl8.5.so(+0x330de)[0x7f9de64b10de] /usr/local/lib/libtcl8.5.so(Tcl_EvalEx+0x16)[0x7f9de64b1aa6] /usr/local/naviserver/lib/libnsd.so(Ns_TclEvalCallback+0x12b)[0x7f9de6e4682b] /usr/local/naviserver/lib/libnsd.so(NsTclTraceProc+0x1c)[0x7f9de6e4a60c] /usr/local/naviserver/lib/libnsd.so(+0x5984a)[0x7f9de6e4a84a] /usr/local/naviserver/lib/libnsd.so(+0x59c45)[0x7f9de6e4ac45] /usr/local/naviserver/lib/libnsd.so(Ns_TclAllocateInterp+0x15)[0x7f9de6e4aef5] /usr/local/naviserver/lib/libnsd.so(NsTclSockProc+0x42)[0x7f9de6e56eb2] /usr/local/naviserver/lib/libnsd.so(+0x5250f)[0x7f9de6e4350f] /usr/local/naviserver/lib/libnsthread.so(NsThreadMain+0x7e)[0x7f9de67a067e] /usr/local/naviserver/lib/libnsthread.so(+0x5029)[0x7f9de67a1029] /lib/libpthread.so.0(+0x68ca)[0x7f9de586a8ca] /lib/libc.so.6(clone+0x6d)[0x7f9de5d53b6d] We are running some test with the google allocator, but the results are similar. Wolfgang --
Wolfgang Winkler |
diff -r 34cdce74dbcd include/nsconfig.h.in
--- a/include/nsconfig.h.in Wed May 15 13:28:34 2013 +0200
+++ b/include/nsconfig.h.in Wed Oct 09 08:12:56 2013 +0200
@@ -331,11 +331,6 @@
# endif
#endif
-/* Enable large inode numbers on Mac OS X 10.5. */
-#ifndef _DARWIN_USE_64_BIT_INODE
-# define _DARWIN_USE_64_BIT_INODE 1
-#endif
-
/* Number of bits in a file offset, on hosts where this is settable. */
#undef _FILE_OFFSET_BITS
diff -r 34cdce74dbcd nsd/sockcallback.c
--- a/nsd/sockcallback.c Wed May 15 13:28:34 2013 +0200
+++ b/nsd/sockcallback.c Wed Oct 09 08:12:56 2013 +0200
@@ -359,8 +359,9 @@
*/
if (max <= table.numEntries) {
- max = table.numEntries + 100;
- pfds = ns_realloc(pfds, (size_t)max);
+ max += 100;
+ //pfds = ns_realloc(pfds, (size_t)max);
+ pfds = ns_malloc(sizeof(struct pollfd) * max);
}
/*
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