Reland https://codereview.chromium.org/298333007/: Enable mac_strip_release...

Reland https://codereview.chromium.org/298333007/: Enable mac_strip_release under ASan on OSX. Remove the .saves files.

The reasons for reverting the CL hadn't been documented. I'm going to reland and update the bugs.

Unce upon a time the ASan runtime library used to be statically linked into
the executables on OSX.
Because that library provided a number of API functions needed by the shared
libraries, we had custom ASan-specific .saves files that told the `strip`
utility to preserve those functions when stripping the executables.

Then ASan switched to using dynamic runtime library, which instantly broke the
stripping step, because the executables weren't necessarily referencing all the
ASan API functions (issue 242503).
As a result, stripping has been disabled, and we haven't had .dSYM debug info
for ASan builds for more than a year now (issue 148383).

Because the ASan API functions are now undefined in the executables, it's
actually senseless to use the .saves files to preserve those functions.
This CL deletes the .saves files and turns mac_strip_release on for ASan
builds.

BUG=148383, 242503, 170739, 166857
TBR=mark@chromium.org

Review URL: https://codereview.chromium.org/517803004

Cr-Commit-Position: refs/heads/master@{#292872}

build/asan.saves

-# Copyright (c) 2011 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.
-
-# This file lists symbols that should not be stripped by Xcode from the binaries
-# built for Mac OS X using AddressSanitizer
-# (http://dev.chromium.org/developers/testing/addresssanitizer).
-
-___asan_init
-___asan_handle_no_return
-___asan_register_global
-___asan_register_globals
-___asan_unregister_globals
-___asan_report_load1
-___asan_report_load2
-___asan_report_load4
-___asan_report_load8
-___asan_report_load16
-___asan_report_store1
-___asan_report_store2
-___asan_report_store4
-___asan_report_store8
-___asan_report_store16

build/common.gypi

@@ -2141,9 +2141,8 @@
         'clang%': 1,
       }],
       ['asan==1 and OS=="mac"', {
-        # TODO(glider): we do not strip ASan binaries until the dynamic ASan
-        # runtime is fully adopted. See http://crbug.com/242503.
-        'mac_strip_release': 0,
+        # Strip and produce the .dSYM files.
+        'mac_strip_release': 1,
       }],
       ['tsan==1', {
         'use_custom_libcxx%': 1,
@@ -4986,16 +4985,6 @@
                 ],
               },
             ],
-            'conditions': [
-              ['asan==1', {
-                'variables': {
-                 'asan_saves_file': 'asan.saves',
-                },
-                'xcode_settings': {
-                  'CHROMIUM_STRIP_SAVE_FILE': '<(asan_saves_file)',
-                },
-              }],
-            ],
             'target_conditions': [
               ['mac_pie==1 and release_valgrind_build==0', {
                 # Turn on position-independence (ASLR) for executables. When
@@ -5035,13 +5024,6 @@
                           # additional flags are added with STRIPFLAGS.
                           'STRIPFLAGS': '-x',
                         }],  # _type=="shared_library" or _type=="loadable_module"
-                        ['_type=="executable"', {
-                          'conditions': [
-                            ['asan==1', {
-                              'STRIPFLAGS': '-s $(CHROMIUM_STRIP_SAVE_FILE)',
-                            }]
-                          ],
-                        }],  # _type=="executable" and asan==1
                       ],  # target_conditions
                     },  # xcode_settings
                   },  # configuration "Release"

chrome/app/app_asan.saves

-# Copyright (c) 2011 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.
-
-# This file lists symbols that should not be stripped from the Mac browser and
-# helper app executables built with AddressSanitizer
-# (http://dev.chromium.org/developers/testing/addresssanitizer).
-
-# The list of Chromium application-specific symbols should be the same as that
-# in chrome/app/app.saves
-# The list of symbols that should be preserved in all the binaries built with
-# AddressSanitizer should correspond to build/asan.saves
-
-# Chromium-specific symbols.
-_main
-
-# AddressSanitizer-specific symbols.
-___asan_init
-___asan_handle_no_return
-___asan_register_global
-___asan_register_globals
-___asan_unregister_globals
-___asan_report_load1
-___asan_report_load2
-___asan_report_load4
-___asan_report_load8
-___asan_report_load16
-___asan_report_store1
-___asan_report_store2
-___asan_report_store4
-___asan_report_store8
-___asan_report_store16

chrome/chrome.gyp

@@ -242,12 +242,6 @@
                 'STRIPFLAGS': '-s $(CHROMIUM_STRIP_SAVE_FILE)',
               },
             }],
-            ['asan==1', {
-              'xcode_settings': {
-                # Override the outer definition of CHROMIUM_STRIP_SAVE_FILE.
-                'CHROMIUM_STRIP_SAVE_FILE': 'app/app_asan.saves',
-              },
-            }],
             ['component=="shared_library"', {
               'xcode_settings': {
                 'LD_RUNPATH_SEARCH_PATHS': [

chrome/chrome_exe.gypi

@@ -458,12 +458,6 @@
         ['chrome_multiple_dll', {
           'defines': ['CHROME_MULTIPLE_DLL'],
         }],
-        ['OS=="mac" and asan==1', {
-          'xcode_settings': {
-            # Override the outer definition of CHROMIUM_STRIP_SAVE_FILE.
-            'CHROMIUM_STRIP_SAVE_FILE': 'app/app_asan.saves',
-          },
-        }],
         ['OS=="linux"', {
           'conditions': [
             ['branding=="Chrome"', {