[coverage] Enable sanitizer coverage.

build/standalone.gypi

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 50 matching lines @@
               # OS!="linux" and OS!="freebsd" and OS!="openbsd" and
               # OS!="netbsd" and OS!="mac" and OS!="aix"
               'host_arch%': 'ia32',
             }],
           ],
         },
         'host_arch%': '<(host_arch)',
         'target_arch%': '<(host_arch)',
         'base_dir%': '<!(cd <(DEPTH) && python -c "import os; print os.getcwd()")',
 
-        # Instrument for code coverage with gcov.
+        # Instrument for code coverage and use coverage wrapper to exclude some
+        # files. Uses gcov if clang=0 is set explicitly. Otherwise,
+        # sanitizer_coverage must be set too.
         'coverage%': 0,
       },
       'base_dir%': '<(base_dir)',
       'host_arch%': '<(host_arch)',
       'target_arch%': '<(target_arch)',
       'v8_target_arch%': '<(target_arch)',
       'coverage%': '<(coverage)',
       'asan%': 0,
       'lsan%': 0,
       'msan%': 0,
@@ skipping 33 matching lines @@
 
       'test_isolation_mode%': 'noop',
 
       'conditions': [
         # Set default gomadir.
         ['OS=="win"', {
           'gomadir': 'c:\\goma\\goma-win',
         }, {
           'gomadir': '<!(/bin/echo -n ${HOME}/goma)',
         }],
-        ['host_arch!="ppc" and host_arch!="ppc64" and host_arch!="ppc64le" and host_arch!="s390" and host_arch!="s390x" and \
-          coverage==0', {
+        ['host_arch!="ppc" and host_arch!="ppc64" and host_arch!="ppc64le" and host_arch!="s390" and host_arch!="s390x"', {
           'host_clang%': 1,
         }, {
           'host_clang%': 0,
         }],
         # linux_use_bundled_gold: whether to use the gold linker binary checked
         # into third_party/binutils.  Force this off via GYP_DEFINES when you
         # are using a custom toolchain and need to control -B in ldflags.
         # Do not use 32-bit gold on 32-bit hosts as it runs out address space
         # for component=static_library builds.
         ['(OS=="linux" or OS=="android") and (target_arch=="x64" or target_arch=="arm" or (target_arch=="ia32" and host_arch=="x64"))', {
@@ skipping 84 matching lines @@
         # goma doesn't support PDB yet.
         'fastbuild%': 1,
       }],
       ['((v8_target_arch=="ia32" or v8_target_arch=="x64" or v8_target_arch=="x87") and \
         (OS=="linux" or OS=="mac")) or (v8_target_arch=="ppc64" and OS=="linux")', {
         'v8_enable_gdbjit%': 1,
       }, {
         'v8_enable_gdbjit%': 0,
       }],
       ['(OS=="linux" or OS=="mac") and (target_arch=="ia32" or target_arch=="x64") and \
-        (v8_target_arch!="x87" and v8_target_arch!="x32") and coverage==0', {
+        (v8_target_arch!="x87" and v8_target_arch!="x32")', {
         'clang%': 1,
       }, {
         'clang%': 0,
       }],
       ['asan==1 or lsan==1 or msan==1 or tsan==1', {
         'clang%': 1,
         'use_allocator%': 'none',
       }],
       ['asan==1 and OS=="linux"', {
         'use_custom_libcxx%': 1,
@@ skipping 478 matching lines @@
           }],
           [ 'host_arch=="ppc64" and OS!="aix"', {
             'cflags': [ '-mminimal-toc' ],
           }],
           [ 'visibility=="hidden" and v8_enable_backtrace==0', {
             'cflags': [ '-fvisibility=hidden' ],
           }],
           [ 'component=="shared_library"', {
             'cflags': [ '-fPIC', ],
           }],
-          [ 'coverage==1', {
+          [ 'clang==0 and coverage==1', {
             'cflags': [ '-fprofile-arcs', '-ftest-coverage'],
             'ldflags': [ '-fprofile-arcs'],
           }],
         ],
       },
     }],
     # 'OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"
     #  or OS=="netbsd"'
     ['OS=="qnx"', {
       'target_defaults': {
@@ skipping 644 matching lines @@
               '-fsanitize=cfi-vcall',
               '-fsanitize=cfi-derived-cast',
               '-fsanitize=cfi-unrelated-cast',
             ],
           }],
         ],
       },
     }],
   ],
 }