[sanitizers] asan_globals GN option

build/config/sanitizers/sanitizers.gni

Index: build/config/sanitizers/sanitizers.gni
diff --git a/build/config/sanitizers/sanitizers.gni b/build/config/sanitizers/sanitizers.gni
index 32cecffcae1e3ecf9ba178625a873add8a96833a..cf61ba8a91be77013fb24390cfa94a05bd07cf89 100644
--- a/build/config/sanitizers/sanitizers.gni
+++ b/build/config/sanitizers/sanitizers.gni
@@ -78,7 +78,6 @@ declare_args() {
   # trace-pc
   # Default value when unset and use_sanitizer_coverage=true:
   #     edge,indirect-calls,8bit-counters
-
   sanitizer_coverage_flags = ""
 }
 
@@ -96,6 +95,16 @@ declare_args() {
   # Enable -fsanitize-coverage.
   use_sanitizer_coverage =
       use_libfuzzer || use_afl || sanitizer_coverage_flags != ""
+
+  # Detect overflow/underflow for global objects.
+  #
+  # Android build relies on -Wl,--gc-sections removing unreachable code.
+  # ASan instrumentation for globals inhibits this and results in a
+  # library with unresolvable relocations.
+  # TODO(eugenis): find a way to reenable this.
+  #
+  # Mac: http://crbug.com/352073
+  asan_globals = !is_android && !is_mac
 }
 
 if (use_afl && sanitizer_coverage_flags == "") {