Date: Tue, 15 Mar 2016 12:41:15 +0100 From: Willem Jan Withagen <wjw@digiware.nl> To: toolchain@freebsd.org Subject: Crash in ostream <<operator Message-ID: <56E7F4DB.2000404@digiware.nl>
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Hi,
While running Ceph tools I get a crash in
fr 10
#10 0x00000000016d82ca in FileStore::omap_get_values(coll_t const&,
ghobject_t const&, std::__1::set<std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char> >,
std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char> > >,
std::__1::allocator<std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char> > > > const&,
std::__1::map<std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char> >, ceph::buffer::list,
std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char> > >,
std::__1::allocator<std::__1::pair<std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char> > const,
ceph::buffer::list> > >*) ()
(gdb) l
95 int preload_erasure_code()
96 {
97 string plugins = g_conf->osd_erasure_code_plugins;
98 stringstream ss;
99 int r = ErasureCodePluginRegistry::instance().preload(
100 plugins,
101 g_conf->erasure_code_dir,
102 &ss);
103 if (r)
104 derr << ss.str() << dendl;
(gdb)
105 else
106 dout(10) << ss.str() << dendl;
107 return r;
108 }
109
All of this seems to be inlined since I'm not able to get at ss or r
#8 0x0000000000e16145 in std::__1::char_traits<char>::length (__s=0x0)
at /usr/include/c++/v1/string:640
640 static inline size_t length(const char_type* __s) {return
strlen(__s);}
Looking at the strlen implementation in
/usr/srcs/head/src/lib/libc/string/strlen.c
shows that strlen does not take 0x0 as pointer, so when we get here with
__s = 0x0 all is lost.
So I tried running it through 3.7, but since this is in the libraries
with the bintools/os, I'd expect
both versions to crash on this.
Now the question I have to solve:
is it the compiler/toolset/libraries
is it a bug in the ceph code.
--WjW
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