Index: lib/asan/asan_globals.cc
===================================================================
--- lib/asan/asan_globals.cc
+++ lib/asan/asan_globals.cc
@@ -212,6 +212,13 @@
 // ---------------------- Interface ---------------- {{{1
 using namespace __asan;  // NOLINT
 
+
+// Apply __asan_(un)register_globals to all globals found in the same loaded
+// shared object as `needle'. This implementation is platform-specific.
+void __asan_apply_to_globals(globals_op_fptr op, void *needle) {
+  AsanApplyToGlobals(op, needle);
+}
+
 // Register an array of globals.
 void __asan_register_globals(__asan_global *globals, uptr n) {
   if (!flags()->report_globals) return;
Index: lib/asan/asan_interface_internal.h
===================================================================
--- lib/asan/asan_interface_internal.h
+++ lib/asan/asan_interface_internal.h
@@ -56,6 +56,13 @@
                                               // or NULL if it is unknown.
   };
 
+  // This function can be called on some platforms to find globals in the same
+  // loaded shared object as `needle' and apply __asan_(un)register_globals
+  // to them.
+  typedef void (*globals_op_fptr)(__asan_global *, uptr);
+  SANITIZER_INTERFACE_ATTRIBUTE
+  void __asan_apply_to_globals(globals_op_fptr op, void *needle);
+
   // These two functions should be called by the instrumented code.
   // 'globals' is an array of structures describing 'n' globals.
   SANITIZER_INTERFACE_ATTRIBUTE
Index: lib/asan/asan_internal.h
===================================================================
--- lib/asan/asan_internal.h
+++ lib/asan/asan_internal.h
@@ -78,6 +78,7 @@
 void *AsanDoesNotSupportStaticLinkage();
 void AsanCheckDynamicRTPrereqs();
 void AsanCheckIncompatibleRT();
+void AsanApplyToGlobals(globals_op_fptr op, void *needle);
 
 void AsanOnDeadlySignal(int, void *siginfo, void *context);
 
Index: lib/asan/asan_linux.cc
===================================================================
--- lib/asan/asan_linux.cc
+++ lib/asan/asan_linux.cc
@@ -75,6 +75,10 @@
   return &_DYNAMIC;  // defined in link.h
 }
 
+void AsanApplyToGlobals(globals_op_fptr op, void *needle) {
+  UNIMPLEMENTED();
+}
+
 #if SANITIZER_ANDROID
 // FIXME: should we do anything for Android?
 void AsanCheckDynamicRTPrereqs() {}
Index: lib/asan/asan_mac.cc
===================================================================
--- lib/asan/asan_mac.cc
+++ lib/asan/asan_mac.cc
@@ -24,9 +24,11 @@
 #include "sanitizer_common/sanitizer_libc.h"
 #include "sanitizer_common/sanitizer_mac.h"
 
+#include <dlfcn.h>
 #include <fcntl.h>
 #include <libkern/OSAtomic.h>
 #include <mach-o/dyld.h>
+#include <mach-o/getsect.h>
 #include <mach-o/loader.h>
 #include <pthread.h>
 #include <stdlib.h>  // for free()
@@ -66,6 +68,30 @@
 // No-op. Mac does not support static linkage anyway.
 void AsanCheckIncompatibleRT() {}
 
+void AsanApplyToGlobals(globals_op_fptr op, void *needle) {
+  // Find the Mach-O header for the image containing the needle
+  Dl_info info;
+  int err = dladdr(needle, &info);
+  if (err == 0) return;
+
+#if __LP64__
+  const struct mach_header_64 *mh = (struct mach_header_64 *)info.dli_fbase;
+#else
+  const struct mach_header *mh = (struct mach_header *)info.dli_fbase;
+#endif
+
+  // Look up the __asan_globals section in that image and register its globals
+  unsigned long size = 0;
+  __asan_global *globals = (__asan_global *)getsectiondata(
+      mh,
+      "__DATA", "__asan_globals",
+      &size);
+
+  if (!globals) return;
+  if (size % sizeof(__asan_global) != 0) return;
+  op(globals, size / sizeof(__asan_global));
+}
+
 void ReadContextStack(void *context, uptr *stack, uptr *ssize) {
   UNIMPLEMENTED();
 }
Index: lib/asan/asan_win.cc
===================================================================
--- lib/asan/asan_win.cc
+++ lib/asan/asan_win.cc
@@ -149,6 +149,10 @@
       (uptr *)&REAL(NtWaitForWorkViaWorkerFactory)));
 }
 
+void AsanApplyToGlobals(globals_op_fptr op, void *needle) {
+  UNIMPLEMENTED();
+}
+
 // ---------------------- TSD ---------------- {{{
 static bool tsd_key_inited = false;