segfault on start (in getLocalIps () at Hostdb.cpp:2844)

[onlyjob]

Gigablast segfaults on start:

Program received signal SIGSEGV, Segmentation fault.
0x000055555575a724 in getLocalIps () at Hostdb.cpp:2844
2844                    int32_t ip = xx->sin_addr.s_addr;
(gdb) bt
#0  0x000055555575a724 in getLocalIps () at Hostdb.cpp:2844
#1  0x0000555555756d8b in Hostdb::init (this=0x555556722000 <g_hostdb>, hostIdArg=-1, netName=0x0, proxyHost=false, useTmpCluster=0 '\000', 
    cwd=0x555555f7b9e0 <getcwd2(char*)::s_cwdBuf> "/var/tmp/debian/TODO.gigablast/GITHUB.fork/") at Hostdb.cpp:1077
#2  0x00005555555e3e8a in main2 (argc=1, argv=0x7fffffffdc88) at main.cpp:1574
#3  0x00005555555e2e35 in main (argc=1, argv=0x7fffffffdc88) at main.cpp:399

(gdb) bt full
#0  0x000055555575a724 in getLocalIps () at Hostdb.cpp:2844
        xx = 0x56e63b38
        ip = 6215224
        s_valid = true
        ifap = 0x555556e63b00
        p = 0x555556e63b00
        ni = 1
        loopback = 16777343
#1  0x0000555555756d8b in Hostdb::init (this=0x555556722000 <g_hostdb>, hostIdArg=-1, netName=0x0, proxyHost=false, useTmpCluster=0 '\000', 
    cwd=0x555555f7b9e0 <getcwd2(char*)::s_cwdBuf> "/var/tmp/debian/TODO.gigablast/GITHUB.fork/") at Hostdb.cpp:1077
        dir = 0x555555f7b9e0 <getcwd2(char*)::s_cwdBuf> "/var/tmp/debian/TODO.gigablast/GITHUB.fork/"
        filename = 0x5555559f0890 "hosts.conf"
        f = {m_closedIt = false, 
          m_filename = "/var/tmp/debian/TODO.gigablast/GITHUB.fork/hosts.conf\000\003\000\000\000\200\340\377\367\377\177\000\000\002", '\000' <repeats 31 times>, m_this = 0x0, m_i = 0, m_closeCount = 1, m_fd = 3, m_flags = 0, m_calledOpen = 1 '\001', m_calledSet = 1 '\001', m_st_mtime = 0, m_st_size = 0}
        status = 1
        numRead = 2716
        p = 0x555556723ad8 <g_hostdb+6872> ""
        pend = 0x555556723ad8 <g_hostdb+6872> ""
        i = 1
        numGrunts = 1
        line = 67
        proxyNum = 0
        indexSplits = 1
        wdir2 = 0x0
        wdirlen2 = 0
        numMirrors = 0
        hostsPerShard = 1
        j = 0
        deadHostTimeout = 2147483647
        next = 1
        localIps = 0x0
        host = 0x0
        h = 0x0
        gcount = 0
#2  0x00005555555e3e8a in main2 (argc=1, argv=0x7fffffffdc88) at main.cpp:1574
        stackPointTestAnchor = 86 'V'
        cmdarg = 0
        cmd = 0x5555558d4c3e ""
        cmd2 = 0x5555558d4c3e ""
        arch = 64
        cc = 0x0
        testMandrill = false
        rl = {rlim_cur = 8388608, rlim_max = 18446744073709551615}
        lim = {rlim_cur = 1024, rlim_max = 1024}
        NOFILE = 1024
        rlim = {rlim_cur = 1024, rlim_max = 1024}
        isProxy = false
        useTmpCluster = 0 '\000'
        workingDir = 0x555555f7b9e0 <getcwd2(char*)::s_cwdBuf> "/var/tmp/debian/TODO.gigablast/GITHUB.fork/"
        h9 = 0x555556db23fc <g_scraper+264828>
        ips = 0x555556db25cc <g_scraper+265292>
        tmp = "\224\376\327VUU\000\000\264\376\327VUU\000\000\324\376\327VUU\000\000\364\376\327VUU\000\000,\000\330VUU\000\000p\032\330VUU\000\000T'\330VUU\000\000\360'\330VUU\000\000\244(\330VUU\000\000\354,\330VUU\000\000\344Y\330VUU\000\000\214\\\330VUU\000\000\064_\330VUU\000\000\334a\330VUU\000\000\204d\330VUU\000\000,g\330VUU\000"
        cleanFileName = {m_capacity = 1456969928, m_length = 21845, m_buf = 0x555556d7f218 <g_scraper+55448> "\001\001", m_label = 0x555556d7fc48 <g_scraper+58056> "",
          m_usingStack = 116, m_encoding = 22231, m_renderHtml = 85 'U'}
        pcount = 21845
        structureFile = "8\033\327VUU\000\000\024%\327VUU\000\000\310\067\327VUU\000\000\350\067\327VUU\000\000\b8\327VUU\000\000\340\071\327VUU\000\000@:\327VUU\000\000\330<\327VUU\000\000\b=\327VUU\000\000dB\327VUU\000\000 C\327VUU\000\000`C\327VUU\000\000\240C\327VUU\000\000\320C\327VUU\000\000\070|\327VUU\000\000X|\327VUU\000\000\254\210\327VUU\000\000\214\211\327VUU\000\000Ȋ\327VUU\000\000\374\213\327VUU\000\000H\215\327VUU\000\000\350\215\327VUU\000\000\f\216\327VUU\000\000,\216\327VUU\000\000L\216\327VUU\000\000l"...
        nce = 21845
--Type <RET> for more, q to quit, c to continue without paging--
        maxMem = 1457201372
        json = {m_sb = {m_capacity = 0, m_length = 0, m_buf = 0x0, m_label = 0x7ffff7ffe180 "", m_usingStack = 96, m_encoding = -1, m_renderHtml = -1 '\377'}, m_stack = {
            0x7fffffffd240, 0x0, 0x7ffff7891130, 0x2, 0x0, 0x0, 0x0, 0x0, 0x7ffff7890a90, 0x7ffff7fdbf9c <check_match+300>, 0xd82b830, 0x1, 0x7ffff76b6dc8,
            0x7ffff7fdbf9c <check_match+300>, 0xb01bca00, 0x0, 0x7ffff7fd0190, 0x7fffffffd6d0, 0x0, 0x7ffff7fdc3a4 <do_lookup_x+932>, 0x2, 0x7ffff7fd02d8, 0x7ffff7ffe730,
            0x7fffffffd568, 0x7fffffffd564, 0x7ffff7fdbf9c <check_match+300>, 0xe6854b87, 0x0, 0x7ffff7fd02d8, 0x7ffff7fd01b8, 0x7ffff783c478, 0xb01bca00, 0x2c06f28,
            0x7fffffffd564, 0x7ffff7ffe758, 0x555556cc6288 <g_repair+218984>, 0x7fffffffd560, 0x555556da1c24 <g_scraper+197284>, 0x7fffffffd570, 0x55555572e05c
     <Msg0::constructor()+164>, 0x7fffffffd590, 0x555556da1b98 <g_scraper+197144>, 0x7fffffffd5a0, 0x55555572df79 <Msg0::Msg0()+61>, 0x555556d719d4 <g_scraper+84>,
            0x55555570deb7 <Query::reset()+275>, 0x7fffffffd5b0, 0x555556dbba0c <g_scraper+303244>, 0xffffffffffffffff, 0x555556e13274 <g_scraper+661748>,
            0x555556d719d4 <g_scraper+84>, 0x5555558351e2 <TagRec::reset()+74>, 0x555556e0fa34 <g_scraper+647348>, 0x555556d8b860 <g_scraper+106208>,
            0x555556d719d4 <g_scraper+84>, 0x555556da20b4 <g_scraper+198452>, 0x555556d719d4 <g_scraper+84>, 0x555555661829 <XmlDoc::reset()+4137>, 0x7fffffffd620,
            0x555556d719d4 <g_scraper+84>, 0x555556e1c354 <g_scraper+698836>, 0x555556e1c2dc <g_scraper+698716>, 0x555556e1c2fc <g_scraper+698748>,
            0x555556e1c374 <g_scraper+698868>}, m_stackPtr = 1457636280, m_prev = 0x55662b1800005555}
#3  0x00005555555e2e35 in main (argc=1, argv=0x7fffffffdc88) at main.cpp:399
        ret = 0


(gdb) thread apply all bt

Thread 1 (Thread 0x7ffff76a6740 (LWP 188821) "gb"):
#0  0x000055555575a724 in getLocalIps () at Hostdb.cpp:2844
#1  0x0000555555756d8b in Hostdb::init (this=0x555556722000 <g_hostdb>, hostIdArg=-1, netName=0x0, proxyHost=false, useTmpCluster=0 '\000', cwd=0x555555f7b9e0 <getcwd2(char*)::s_cwdBuf> "/var/tmp/debian/TODO.gigablast/GITHUB.fork/") at Hostdb.cpp:1077
#2  0x00005555555e3e8a in main2 (argc=1, argv=0x7fffffffdc88) at main.cpp:1574
#3  0x00005555555e2e35 in main (argc=1, argv=0x7fffffffdc88) at main.cpp:399

https://github.com/gigablast/open-source-search-engine/blob/master/Hostdb.cpp#L2844

[onlyjob]

I've been trying to get around this problem and I've managed to start Gigablast with the following patch (not a fix!):

--- a/Hostdb.cpp
+++ b/Hostdb.cpp
@@ -2833,10 +2833,12 @@
 	int32_t ni = 0;
 	// store loopback just in case
 	int32_t loopback = atoip("127.0.0.1");
 	s_localIps[ni++] = loopback;
+	s_localIps[ni++] = loopback;
 	for ( ; p && ni < 18 ; p = p->ifa_next ) {
 		// avoid possible core dump
+		continue;
 		if ( ! p->ifa_addr ) continue;
 		//break; // mdw hack...
 		struct sockaddr_in *xx = (sockaddr_in *)p->ifa_addr;
 		// fix the bug when compiling for 64-bit arch

Unfortunately I'm not qualified to fix the problem properly but I hope that the patch might get us just a little bit closer to understanding...

[onlyjob]

The fork may have fixed this problem: https://github.com/Acidburn0zzz/open-source-search-engine/blob/master/Hostdb.cpp#L1783

[CompunixAustralia]

This appears to be related to #86

Even after ifaddr.h is placed above gb-include.h, the swapInts function causes segfault with *xx and needs further debuging.
segfault also occurs with swapInts call removed and ifaddr.h below gb-include.h

Will issue a pull request

[CompunixAustralia]

See CompunixAustralia@014ed8d