MemorySanitizer: common.gypi changes.

build/common.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 260 matching lines @@
       # -fsanitize=address only works with clang, but asan=1 implies clang=1
       # See https://sites.google.com/a/chromium.org/dev/developers/testing/addresssanitizer
       'asan%': 0,
 
       # Enable building with TSAN (Clang's -fsanitize=thread option).
       # -fsanitize=thread only works with clang, but tsan=1 implies clang=1
       # See http://clang.llvm.org/docs/ThreadSanitizer.html
       'tsan%': 0,
       'tsan_blacklist%': '<(PRODUCT_DIR)/../../tools/valgrind/tsan_v2/ignores.txt',
 
+      # Enable building with MSAN (Clang's -fsanitize=memory option).
+      # MemorySanitizer only works with clang, but msan=1 implies clang=1
+      # See http://clang.llvm.org/docs/MemorySanitizer.html
+      'msan%': 0,
+
       # Use a modified version of Clang to intercept allocated types and sizes
       # for allocated objects. clang_type_profiler=1 implies clang=1.
       # See http://dev.chromium.org/developers/deep-memory-profiler/cpp-object-type-identifier
       # TODO(dmikurube): Support mac.  See http://crbug.com/123758#c11
       'clang_type_profiler%': 0,
 
       # Set to true to instrument the code with function call logger.
       # See src/third_party/cygprofile/cyg-profile.cc for details.
       'order_profiling%': 0,
 
@@ skipping 417 matching lines @@
     'enable_one_click_signin%': '<(enable_one_click_signin)',
     'enable_webrtc%': '<(enable_webrtc)',
     'chromium_win_pch%': '<(chromium_win_pch)',
     'configuration_policy%': '<(configuration_policy)',
     'safe_browsing%': '<(safe_browsing)',
     'input_speech%': '<(input_speech)',
     'notifications%': '<(notifications)',
     'clang_use_chrome_plugins%': '<(clang_use_chrome_plugins)',
     'mac_want_real_dsym%': '<(mac_want_real_dsym)',
     'asan%': '<(asan)',
+    'msan%': '<(msan)',
     'tsan%': '<(tsan)',
     'tsan_blacklist%': '<(tsan_blacklist)',
     'clang_type_profiler%': '<(clang_type_profiler)',
     'order_profiling%': '<(order_profiling)',
     'order_text_section%': '<(order_text_section)',
     'enable_extensions%': '<(enable_extensions)',
     'enable_web_intents_tag%': '<(enable_web_intents_tag)',
     'enable_plugin_installation%': '<(enable_plugin_installation)',
     'enable_plugins%': '<(enable_plugins)',
     'enable_session_service%': '<(enable_session_service)',
@@ skipping 314 matching lines @@
       ['use_official_google_api_keys==2', {
         'use_official_google_api_keys%':
             '<!(python <(DEPTH)/google_apis/build/check_internal.py <(DEPTH)/google_apis/internal/google_chrome_api_keys.h)',
       }],
       ['os_posix==1 and OS!="mac" and OS!="ios"', {
         # Figure out the python architecture to decide if we build pyauto.
         'python_arch%': '<!(<(DEPTH)/build/linux/python_arch.sh <(sysroot)/usr/<(system_libdir)/libpython<(python_ver).so.1.0)',
         'conditions': [
           # TODO(glider): set clang to 1 earlier for ASan and TSan builds so
           # that it takes effect here.
-          ['clang==0 and asan==0 and tsan==0', {
+          ['clang==0 and asan==0 and tsan==0 and msan==0', {
             # This will set gcc_version to XY if you are running gcc X.Y.*.
             # This is used to tweak build flags for gcc 4.5.
             'gcc_version%': '<!(python <(DEPTH)/build/compiler_version.py)',
           }, {
             'gcc_version%': 0,
           }],
           ['target_arch=="mipsel"', {
             'werror%': '',
             'disable_nacl%': 1,
             'linux_use_gold_binary%': 0,
@@ skipping 406 matching lines @@
       ['asan==1 and OS=="mac"', {
         # See http://crbug.com/145503.
         'component': "static_library",
         # TODO(glider): we do not strip ASan binaries until the dynamic ASan
         # runtime is fully adopted. See http://crbug.com/170629.
         'mac_strip_release': 0,
       }],
       ['tsan==1', {
         'clang%': 1,
       }],
+      ['msan==1', {
+        'clang%': 1,
+      }],
 
       ['OS=="linux" and clang_type_profiler==1', {
         'clang%': 1,
         'clang_use_chrome_plugins%': 0,
         'conditions': [
           ['host_arch=="x64"', {
             'make_clang_dir%': 'third_party/llvm-allocated-type/Linux_x64',
           }],
           ['host_arch=="ia32"', {
             # 32-bit Clang is unsupported.  It may not build.  Put your 32-bit
@@ skipping 1432 matching lines @@
                 'target_conditions': [
                   ['_type=="executable"', {
                     'ldflags': [
                       '-pie',
                     ],
                   }],
                 ],
               }],
             ],
           }],
+          ['msan==1', {
+            'target_conditions': [
+              ['_toolset=="target"', {
+                'cflags': [
+                  '-fsanitize=memory',
+                  '-fsanitize-memory-track-origins',
+                  '-fno-omit-frame-pointer',
+                  '-fPIC',
+                ],
+                'ldflags': [
+                  '-fsanitize=memory',
+                ],
+                'defines': [
+                  'MEMORY_SANITIZER',
+                ],
+                'target_conditions': [
+                  ['_type=="executable"', {
+                    'ldflags': [
+                      '-pie',
+                    ],
+                  }],
+                ],
+              }],
+            ],
+          }],
           ['order_profiling!=0 and (chromeos==1 or OS=="linux" or OS=="android")', {
             'target_conditions' : [
               ['_toolset=="target"', {
                 'cflags': [
                   '-finstrument-functions',
                   # Allow mmx intrinsics to inline, so that the
                   # compiler can expand the intrinsics.
                   '-finstrument-functions-exclude-file-list=mmintrin.h',
                 ],
               }],
@@ skipping 1160 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }