[hwasan] Tweak process and thread initialization.
Make sure that TLS_SLOT_TSAN is always available and correctly set up in
HWASan-instrumented functions by setting up the tls register and running hwasan
initialization (__hwasan_init in the main thread and __hwasan_thread_enter in
secondary) early enough.
This is needed to accomodate a change in HWASan: https://reviews.llvm.org/D52249
Bug: 112438058
Test: boot with SANITIZE_TARGET=hwaddress, run bionic-tests
Change-Id: Icd909a4ea0da6c6c1095522bcc28debef5f2c63d
diff --git a/libc/bionic/clone.cpp b/libc/bionic/clone.cpp
index b895305..2a6ab41 100644
--- a/libc/bionic/clone.cpp
+++ b/libc/bionic/clone.cpp
@@ -41,6 +41,7 @@
extern "C" __noreturn void __exit(int status);
// Called from the __bionic_clone assembler to call the thread function then exit.
+__attribute__((no_sanitize("hwaddress")))
extern "C" __LIBC_HIDDEN__ void __start_thread(int (*fn)(void*), void* arg) {
BIONIC_STOP_UNWIND;