runtime/cgo: provide backward compatibility with old glibc for cgo

src/runtime/cgo/gcc_stack_unix.c

@@ -9,6 +9,7 @@
 #endif
 
 #include <pthread.h>
+#include <string.h>
 #include "libcgo.h"
 
 void
@@ -17,12 +18,33 @@ x_cgo_getstackbound(uintptr bounds[2])
 	pthread_attr_t attr;
 	void *addr;
 	size_t size;
+	int err;
 
 #if defined(__GLIBC__) || (defined(__sun) && !defined(__illumos__))
 	// pthread_getattr_np is a GNU extension supported in glibc.
 	// Solaris is not glibc but does support pthread_getattr_np
 	// (and the fallback doesn't work...). Illumos does not.
-	pthread_getattr_np(pthread_self(), &attr);  // GNU extension
+
+	// After glibc 2.31, there is a `__pthread_attr_init` call in
+	// `pthread_getattr_np`, but if there is no init for `attr`, it
+	// will cause `pthread_attr_destroy` free some unknown memory,
+	// which will cause golang crash, so we need to call
+	// `pthread_attr_init` firstly to have a backward compatibility
+	//  with glibc(<= 2.31).
+	pthread_attr_init(&attr);
+
+	err = pthread_getattr_np(pthread_self(), &attr);  // GNU extension
+
+	// As we all know, when using clone(2), there is a tid dirty cache
+	// bug in all versions of glibc(>=2.25), which is introduced by:
+	// https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=c579f48e
+	// But we can ignore this bug because we only need the stack's addr
+	// and size here, and the error is from `__pthread_getaffinity_np`,
+	// which is unrelated to the stack info.
+	if (err != 0 && err != 3) {
+		fatalf("pthread_getattr_np failed: %s", strerror(err));
+	}
+
 	pthread_attr_getstack(&attr, &addr, &size); // low address
 #elif defined(__illumos__)
 	pthread_attr_init(&attr);