NOSUBMIT: Reduce ASAN memory consumption on 32-bit Intel Chrome OS

build/sanitizers/sanitizer_options.cc

 // Copyright 2014 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 contains the default options for various compiler-based dynamic
 // tools.
 
 #include "build/build_config.h"
 
 #if defined(ADDRESS_SANITIZER) && defined(OS_MACOSX)
@@ skipping 40 matching lines @@
 //     output routines) arguments.
 //   use_sigaltstack=1 - handle signals on an alternate signal stack. Useful
 //     for stack overflow detection.
 //   strip_path_prefix=/../../ - prefixes up to and including this
 //     substring will be stripped from source file paths in symbolized reports
 //   fast_unwind_on_fatal=1 - use the fast (frame-pointer-based) stack unwinder
 //     to print error reports. V8 doesn't generate debug info for the JIT code,
 //     so the slow unwinder may not work properly.
 //   detect_stack_use_after_return=1 - use fake stack to delay the reuse of
 //     stack allocations and detect stack-use-after-return errors.
-#if defined(OS_LINUX)
+//   quarantine_size_mb=16 - reduce size of quarantine used to detect use-after-
+//     free errors. Increases risk of false negatives but uses less RAM.
+#if defined(OS_CHROMEOS) && defined(ARCH_CPU_X86)
+// On 32-bit Intel Chrome OS try to reduce ASAN memory consumption with
+// quarantine_size_mb.
+const char kAsanDefaultOptions[] =
+    "symbolize=1 check_printf=1 use_sigaltstack=1 "
+    "detect_leaks=0 strip_path_prefix=/../../ fast_unwind_on_fatal=1 "
+    "detect_stack_use_after_return=0 "
+    "quarantine_size_mb=16 ";
+#elif defined(OS_LINUX)
 #if defined(GOOGLE_CHROME_BUILD)
 // Default AddressSanitizer options for the official build. These do not affect
 // tests on buildbots (which don't set GOOGLE_CHROME_BUILD) or non-official
 // Chromium builds.
 const char kAsanDefaultOptions[] =
     "legacy_pthread_cond=1 malloc_context_size=5 "
     "symbolize=1 check_printf=1 use_sigaltstack=1 detect_leaks=0 "
     "strip_path_prefix=/../../ fast_unwind_on_fatal=1";
 #else
 // Default AddressSanitizer options for buildbots and non-official builds.
@@ skipping 106 matching lines @@
 // Default options for UndefinedBehaviorSanitizer:
 //   print_stacktrace=1 - print the stacktrace when UBSan reports an error.
 const char kUbsanDefaultOptions[] =
     "print_stacktrace=1 strip_path_prefix=/../../ ";
 
 SANITIZER_HOOK_ATTRIBUTE const char* __ubsan_default_options() {
   return kUbsanDefaultOptions;
 }
 
 #endif  // UNDEFINED_SANITIZER