Hi all,
I am trying to compile Address Sanitizer in nokogiri Ruby gem.
Compiled libxml2 and libxslt with Address Sanitizer like this:
./configure CFLAGS="-fsanitize=address,undefined -Wformat
-Werror=format-security -Werror=array-bounds -g"
CXXFLAGS="-fsanitize=address,undefined -Wformat -Werror=format-security
-Werror=array-bounds -g" LDFLAGS="-fsanitize=address,undefined" CC="clang"
CXX="clang++"
And installed gem like this:
sudo gem install nokogiri --version 1.8.0 -- --use-system-libraries
--with-xml2-include=/home/user/Downloads/libxml2-2.9.3/include/
--with-xml2-lib=/usr/local/lib/ --with-cflags=\"-fsanitize=address\"
--with-ldflags=\"-fsanitize=address -lasan -lubsan\"
--with-xslt-include=/home/user/Downloads/libxslt-1.1.28/
However when I run sample Ruby script using Nokogiri
script.rb
#!/usr/bin/ruby
require 'nokogiri'
doc = File.open("sample.xml") { |f| Nokogiri::XML(f) }
I get this message:
./script.rb ==30473==ASan runtime does not come first in initial library
list; you should either link runtime to your application or manually
preload it with LD_PRELOAD.
When I do the preload:
LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libasan.so.2 ./script.rb
/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in
`require':
/var/lib/gems/2.3.0/gems/nokogiri-1.8.0/lib/nokogiri/nokogiri.so: undefined
symbol: __asan_init -
/var/lib/gems/2.3.0/gems/nokogiri-1.8.0/lib/nokogiri/nokogiri.so (LoadError)
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in
`require'
from /var/lib/gems/2.3.0/gems/nokogiri-1.8.0/lib/nokogiri.rb:32:in
`rescue in <top (required)>'
from /var/lib/gems/2.3.0/gems/nokogiri-1.8.0/lib/nokogiri.rb:28:in
`<top (required)>'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in
`require'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in
`rescue in require'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:40:in
`require'
from ./script.rb:2:in `<main>'
=================================================================
==30485==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 319176 byte(s) in 4259 object(s) allocated from:
#0 0x7fce9ea4579a in __interceptor_calloc
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x9879a)
#1 0x7fce9e5b4383 in ruby_xcalloc
(/usr/lib/x86_64-linux-gnu/libruby-2.3.so.2.3+0x85383)
.
.
.
Do I have to build Ruby also with Address Sanitizer? Which unfortunately
fails ...
cd ruby-2.3.0
./configure --disable-shared CFLAGS="-fsanitize=address -ggdb"
CXXFLAGS="-fsanitize=address -ggdb"
make
Breaks upon compilation, showing Memory Leak :/
How do I correctly enable Address Sanitizer in Ruby, on Ruby Gem?
Thanks,
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