Try keno's tentative TLS fix

Author: gbaraldi

compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp

@@ -16,6 +16,8 @@
 #include "sanitizer_flags.h"
 #include "sanitizer_platform_interceptors.h"
 
+#include <malloc.h>
+
 namespace __sanitizer {
 #if SANITIZER_INTERCEPT_TLS_GET_ADDR
 
@@ -139,6 +141,8 @@ DTLS::DTV *DTLS_on_tls_get_addr(void *arg_void, void *res,
     tls_beg = header->start;
     VReport(2, "__tls_get_addr: glibc >=2.19 suspected; tls={0x%zx 0x%zx}\n",
             tls_beg, tls_size);
+  } else if (uptr size = malloc_usable_size((void *)tls_beg)) {
+    tls_size = size;
   } else {
     VReport(2, "__tls_get_addr: Can't guess glibc version\n");
     // This may happen inside the DTOR of main thread, so just ignore it.