[Bug middle-end/78294] [5/6/7 Regression] -fsanitize=thread broken by ignoring __attribute__((tls_model("initial-exec")))

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78294

--- Comment #15 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Easiest fix:

diff --git a/libsanitizer/tsan/tsan_rtl.cc b/libsanitizer/tsan/tsan_rtl.cc
index 07fa165e939c..0a40e3c9a2e1 100644
--- a/libsanitizer/tsan/tsan_rtl.cc
+++ b/libsanitizer/tsan/tsan_rtl.cc
@@ -43,6 +43,7 @@ extern "C" void __tsan_resume() {
 namespace __tsan {

 #if !SANITIZER_GO && !SANITIZER_MAC
+__attribute__((tls_model("initial-exec")))
 THREADLOCAL char cur_thread_placeholder[sizeof(ThreadState)] ALIGNED(64);
 #endif
 static char ctx_placeholder[sizeof(Context)] ALIGNED(64);