Disable ICF for sanitizer builds to preserve the debug info.

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 612 matching lines @@
       # Variables to control Link-Time Optimizations (LTO).
       # Note: the variables must *not* be enabled at the same time.
       #       In this case LTO would 'merge' the optimization flags
       #       at link-time which would lead to all code be optimized with -O2.
       # Enable LTO on the code compiled with -Os.
       # See crbug.com/407544
       'use_lto%': 0,
       # Enable LTO on code compiled with -O2.
       'use_lto_o2%': 0,
 
+      # Allowed level of identical code folding in the gold linker.
+      'gold_icf_level%': 'safe',
+
       # Libxkbcommon usage.
       'use_xkbcommon%': 0,
 
       'conditions': [
         # A flag for POSIX platforms
         ['OS=="win"', {
           'os_posix%': 0,
         }, {
           'os_posix%': 1,
         }],
@@ skipping 549 matching lines @@
     'enable_mdns%' : '<(enable_mdns)',
     'enable_service_discovery%' : '<(enable_service_discovery)',
     'enable_wifi_bootstrapping%': '<(enable_wifi_bootstrapping)',
     'enable_hangout_services_extension%' : '<(enable_hangout_services_extension)',
     'v8_optimized_debug%': '<(v8_optimized_debug)',
     'proprietary_codecs%': '<(proprietary_codecs)',
     'use_goma%': '<(use_goma)',
     'gomadir%': '<(gomadir)',
     'use_lto%': '<(use_lto)',
     'use_lto_o2%': '<(use_lto_o2)',
+    'gold_icf_level%': '<(gold_icf_level)',
     'video_hole%': '<(video_hole)',
     'support_pre_M6_history_database%': '<(support_pre_M6_history_database)',
     'v8_use_external_startup_data%': '<(v8_use_external_startup_data)',
 
     # Use system protobuf instead of bundled one.
     'use_system_protobuf%': 0,
 
     # Use system yasm instead of bundled one.
     'use_system_yasm%': 0,
 
@@ skipping 927 matching lines @@
       }],
       ['clang_use_chrome_plugins==1 and OS!="win"', {
         'clang_chrome_plugins_flags': [
           '<!@(<(DEPTH)/tools/clang/scripts/plugin_flags.sh)'
         ],
       }],
       ['asan==1 or msan==1 or lsan==1 or tsan==1', {
         'clang%': 1,
         'use_allocator%': 'none',
         'use_sanitizer_options%': 1,
+        # Disable ICF in the linker to avoid debug info loss.
+        'gold_icf_level%': 'none',
       }],
       ['asan==1 and OS=="linux" and chromeos==0', {
         'use_custom_libcxx%': 1,
       }],
       ['ubsan==1', {
         'clang%': 1,
       }],
       ['ubsan_vptr==1', {
         'clang%': 1,
       }],
@@ skipping 2241 matching lines @@
                   # '-Wl,--threads',
                   # '-Wl,--thread-count=4',
                 ],
               }],
             ],
             'conditions': [
               ['release_valgrind_build==0 and order_profiling==0', {
                 'target_conditions': [
                   ['_toolset=="target"', {
                     'ldflags': [
-                      '-Wl,--icf=safe',
+                      '-Wl,--icf=<(gold_icf_level)',
                     ],
                   }],
                 ],
               }],
             ],
           }],
           ['linux_use_bundled_binutils==1', {
             'cflags': [
               '-B<!(cd <(DEPTH) && pwd -P)/<(binutils_dir)',
             ],
@@ skipping 297 matching lines @@
                     ],
                     'cflags_cc': [
                       '-Wno-non-virtual-dtor',
                     ],
                   }],
                 ],
               }],
               ['target_arch == "arm" and order_profiling==0', {
                 'ldflags': [
                   # Enable identical code folding to reduce size.
-                  '-Wl,--icf=safe',
+                  '-Wl,--icf=<(gold_icf_level)',
                 ],
               }],
               # NOTE: The stlport header include paths below are specified in
               # cflags rather than include_dirs because they need to come
               # after include_dirs. Think of them like system headers, but
               # don't use '-isystem' because the arm-linux-androideabi-4.4.3
               # toolchain (circa Gingerbread) will exhibit strange errors.
               # The include ordering here is important; change with caution.
               ['android_webview_build==0', {
                 'cflags': [
@@ skipping 1179 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',
   },
 }