I'm seeing similar deadlocks of firefox with 100% cpu usage; this is
happening a lot. I have installed firefox-dbg and started firefox with
"-g" under gdb. When I hit Ctrl-C during a deadlock I get this
backtrace:
(gdb) where
#0 0x00007fffe954c546 in js::irregexp::InterpretCode<unsigned
char>(JSContext*, unsigned char const*, unsigned char const*, unsigned long,
unsigned long, js::MatchPairs*, unsigned long*) (cx=cx@entry=0x7fffe1b8d000,
byteCode=byteCode@entry=0x7fff73838000 "\002", chars=0x7fff7bd12000
";##[{\"type\":\"http://schema|org/WebPage\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/NewsArticle\""...,
current=2274,
current@entry=0, length=length@entry=4327, matches=matches@entry=0x0,
endIndex=0x7fffffff4fc0)
at
/build/firefox-iUv61F/firefox-53.0.2+build1/js/src/irregexp/RegExpInterpreter.cpp:142
#1 0x00007fffe93751f5 in js::RegExpShared::execute(JSContext*,
JS::Handle<JSLinearString*>, unsigned long, js::MatchPairs*, unsigned long*)
(this=this@entry=0x7fff74bc8900, cx=cx@entry=0x7fffe1b8d000,
input=input@entry=..., start=start@entry=0, matches=matches@entry=0x0,
endIndex=endIndex@entry=0x7fffffff4fc0) at
/build/firefox-iUv61F/firefox-53.0.2+build1/js/src/vm/RegExpObject.cpp:1175
#2 0x00007fffe95b7a7c in ExecuteRegExpImpl (endIndex=0x7fffffff4fc0,
matches=0x0, searchIndex=<optimized out>, input=..., re=...,
res=0x7fffd142ab30, cx=0x7fffe1b8d000) at
/build/firefox-iUv61F/firefox-53.0.2+build1/js/src/builtin/RegExp.cpp:127
#3 0x00007fffe95b7a7c in ExecuteRegExp (staticsUpdate=js::UpdateRegExpStatics,
endIndex=0x7fffffff4fc0, matches=0x0, lastIndex=<optimized out>, string=...,
regexp=..., cx=0x7fffe1b8d000) at
/build/firefox-iUv61F/firefox-53.0.2+build1/js/src/builtin/RegExp.cpp:971
#4 0x00007fffe95b7a7c in js::RegExpTesterRaw(JSContext*,
JS::Handle<JSObject*>, JS::Handle<JSString*>, int, int*) (cx=0x7fffe1b8d000,
regexp=..., input=..., lastIndex=<optimized out>, endIndex=0x7fffffff5094)
at
/build/firefox-iUv61F/firefox-53.0.2+build1/js/src/builtin/RegExp.cpp:1197
#5 0x000032f931aa347a in ()
#6 0x00007fffd9600560 in ()
#7 0x00007fffffff5094 in ()
#8 0x00007fffd1508680 in ()
#9 0x00007fffead51ae0 in js::jit::RegExpTesterRawInfo () at
/usr/lib/firefox/libxul.so
#10 0x00007fffd96718e0 in ()
#11 0x000032f931da5ab0 in ()
#12 0x0000000000003820 in ()
#13 0x00007fffd1508680 in ()
#14 0x00007fff6df9fc40 in ()
#15 0x0000000000000000 in ()
My guess is that firefox is stuck executing a pretty weird regular
expression:
(gdb) set print elements 0
(gdb) print chars
$5 = (const unsigned char *) 0x7fff7bd12000
";##[{\"type\":\"http://schema|org/WebPage\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/NewsArticle\",\"properties\":{}},{\"type\":\"https://schema|org/Organization\",\"properties\":{}},{\"type\":\"http://schema|org/ImageObject\",\"properties\":{}},{\"type\":\"http://schema|org/ImageObject\",\"properties\":{}},{\"type\":\"http://schema|org/ImageObject\",\"properties\":{}},{\"type\":\"http://schema|org/ImageObject\",\"properties\":{}},{\"type\":\"http://schema|org/ImageObject\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\"
,\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\
"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"pr
operties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"prop
erties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://schema|org/Comment\",\"properties\":{}},{\"type\":\"http://schema|org/Person\",\"properties\":{}},{\"type\":\"http://data-vocabulary|org/Breadcrumb\",\"properties\":{}},{\"type\":\"http://data-vocabulary|org/Breadcrumb\",\"properties\":{}},{\"type\":\"http://data-vocabulary|org/Breadcrumb\",\"properties\":{}}]"
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https://bugs.launchpad.net/bugs/1692298
Title:
firefox hangs using 100% cpu
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