Add instrumented libraries build with msan

third_party/instrumented_libraries/download_build_install.py

Index: third_party/instrumented_libraries/download_build_install.py
===================================================================
--- third_party/instrumented_libraries/download_build_install.py	(revision 238347)
+++ third_party/instrumented_libraries/download_build_install.py	(working copy)
@@ -12,7 +12,12 @@
 import sys
 
 # Should be a dict from 'sanitizer type' to 'compiler flag'.
-SUPPORTED_SANITIZERS = {'asan': 'address'}
+SUPPORTED_SANITIZERS = {

[alextaran1, 2013/12/03 11:35:47]

Looks like a part of gyp-file. Not sure should this dict be there or in
gyp-file.

[Alexander Potapenko, 2013/12/03 11:46:46]

Yeah, probably. Let us leave it as is and then refactor.

+  'asan': {'compiler_flags': '-fsanitize=address -g -fPIC -w'},

[Alexander Potapenko, 2013/12/03 11:46:46]

Please use -gline-tables-only instead of -g.

+  'msan': {'compiler_flags':
+    '-fsanitize=memory -fsanitize-memory-track-origins -g -fPIC -w'
+  },
+}
 
 
 class ScopedChangeDirectory(object):
@@ -37,16 +42,18 @@
   command = 'apt-get -s build-dep %s | grep Inst | cut -d " " -f 2' % library
   command_result = subprocess.Popen(command, stdout=subprocess.PIPE,
       shell=True)
+  if command_result.wait():
+    raise Exception("Failed to determine build dependencies for %s" % library)
   build_dependencies = [l.strip() for l in command_result.stdout]
   return build_dependencies
 
 
 def download_build_install(parsed_arguments):
-  sanitizer_flag = SUPPORTED_SANITIZERS[parsed_arguments.sanitizer_type]
+  sanitizer_params = SUPPORTED_SANITIZERS[parsed_arguments.sanitizer_type]
   
   environment = os.environ.copy()
-  environment['CFLAGS'] = '-fsanitize=%s -g -fPIC -w' % sanitizer_flag
-  environment['CXXFLAGS'] = '-fsanitize=%s -g -fPIC -w' % sanitizer_flag
+  environment['CFLAGS'] = sanitizer_params['compiler_flags']
+  environment['CXXFLAGS'] = sanitizer_params['compiler_flags']
   # We use XORIGIN as RPATH and after building library replace it to $ORIGIN
   # The reason: this flag goes through configure script and makefiles
   # differently for different libraries. So the dollar sign '$' should be