Implement disable_pie for all executables.

build/common.gypi

 # 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.
 
 # 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 194 matching lines @@
 
       # Enable building with ASAN (Clang's -fasan option).
       # -fasan only works with clang, but asan=1 implies clang=1
       # See https://sites.google.com/a/chromium.org/dev/developers/testing/addresssanitizer
       'asan%': 0,
 
       # Set to 1 compile with -fPIC cflag on linux. This is a must for shared
       # libraries on linux x86-64 and arm, plus ASLR.
       'linux_fpic%': 1,
 
+      # Default to enabled PIE; this is important for ASLR but we need to be
+      # able to turn it off for remote debugging on Chromium OS
+      'disable_pie%': 0,
+
       # Enable navigator.registerProtocolHandler and supporting UI.
       'enable_register_protocol_handler%': 1,
 
       # Enable Web Intents and supporting UI.
       'enable_web_intents%': 0,
 
       # Smooth scrolling is disabled by default.
       'enable_smooth_scrolling%': 0,
 
       # Webrtc compilation is enabled by default. Set to 0 to disable.
@@ skipping 122 matching lines @@
     'use_aura%': '<(use_aura)',
     'use_openssl%': '<(use_openssl)',
     'use_nss%': '<(use_nss)',
     'os_posix%': '<(os_posix)',
     'use_glib%': '<(use_glib)',
     'toolkit_uses_gtk%': '<(toolkit_uses_gtk)',
     'use_skia%': '<(use_skia)',
     'use_x11%': '<(use_x11)',
     'use_gnome_keyring%': '<(use_gnome_keyring)',
     'linux_fpic%': '<(linux_fpic)',
+    'disable_pie%': '<(disable_pie)',

[Nico, 2011/10/07 22:53:25]

It looks like this is not conditionally set. Can't you just say 'disable_pie%':
'0, (like 'channel%' below) and not do this copying?

[rkc, 2011/10/07 23:23:28]

Done.

     'enable_flapper_hacks%': '<(enable_flapper_hacks)',
     'chromeos%': '<(chromeos)',
     'touchui%': '<(touchui)',
     'use_virtual_keyboard%': '<(use_virtual_keyboard)',
     'use_xi2_mt%':'<(use_xi2_mt)',
     'file_manager_extension%': '<(file_manager_extension)',
     'webui_task_manager%': '<(webui_task_manager)',
     'inside_chromium_build%': '<(inside_chromium_build)',
     'fastbuild%': '<(fastbuild)',
     'dcheck_always_on%': '<(dcheck_always_on)',
@@ skipping 1380 matching lines @@
                   }],
                 ],
               }],
             ],
           }],
           ['linux_fpic==1', {
             'cflags': [
               '-fPIC',
             ],
           }],
+          # TODO(rkc): Currently building Chrome with the PIE flag causes
+          # remote debugging to break (remote debugger does not get correct
+          # section header offsets hence causing all symbol handling to go
+          # kaboom). See crosbug.com/15266
+          # Remove this flag once this issue is fixed.
+          ['disable_pie==1', {

[Nico, 2011/10/07 22:53:25]

since this is linux only, should this be called linux_disable_pie?

[rkc, 2011/10/07 23:23:28]

Done.

+            'target_conditions': [
+              ['_type=="executable"', {
+                'ldflags': [
+                  '-nopie',
+                ],
+              }],
+            ],
+          }],
           ['sysroot!=""', {
             'target_conditions': [
               ['_toolset=="target"', {
                 'cflags': [
                   '--sysroot=<(sysroot)',
                 ],
                 'ldflags': [
                   '--sysroot=<(sysroot)',
                 ],
               }]]
@@ skipping 732 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',
   },
 }