Non-SFI mode: Add Linux asynchronous signal support

src/untrusted/nacl/nacl_irt.h

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef NATIVE_CLIENT_SRC_UNTRUSTED_NACL_IRT_H_
 #define NATIVE_CLIENT_SRC_UNTRUSTED_NACL_IRT_H_
 
 #include <errno.h>
 
 #include "native_client/src/include/elf32.h"
 #include "native_client/src/untrusted/irt/irt.h"
 #include "native_client/src/untrusted/irt/irt_dev.h"
 
 extern TYPE_nacl_irt_query __nacl_irt_query;
 
 /* These declarations are defined within libnacl. */
 extern struct nacl_irt_basic __libnacl_irt_basic;
 extern struct nacl_irt_fdio __libnacl_irt_fdio;
 extern struct nacl_irt_dev_fdio __libnacl_irt_dev_fdio;
 extern struct nacl_irt_dev_filename __libnacl_irt_dev_filename;
 extern struct nacl_irt_memory __libnacl_irt_memory;
 extern struct nacl_irt_tls __libnacl_irt_tls;
 extern struct nacl_irt_clock __libnacl_irt_clock;
 extern struct nacl_irt_dev_getpid __libnacl_irt_dev_getpid;
 
 /* These declarations are defined within libpthread. */
-extern struct nacl_irt_thread __libnacl_irt_thread;
+extern struct nacl_irt_thread_v0_2 __libnacl_irt_thread;
 extern struct nacl_irt_futex __libnacl_irt_futex;
 
 extern int __libnacl_irt_query(const char *interface,
                                void *table, size_t table_size);
 extern void __libnacl_mandatory_irt_query(const char *interface_ident,
                                           void *table, size_t table_size);
 extern void __libnacl_irt_init(Elf32_auxv_t *auxv);
 
 extern void __libnacl_irt_clock_init(void);
 extern void __libnacl_irt_dev_fdio_init(void);
@@ skipping 20 matching lines @@
  * function pointer to the interface struct atomically, so that this
  * is thread-safe if foo_func() is called in multiple threads.
  *
  * A limitation of this approach is that, if the IRT does not provide
  * the "foo" interface, each call to foo_func() will call the IRT's
  * query function.
  */
 extern int __libnacl_irt_init_fn(void *interface_field, void (*init)(void));
 
 #endif  /* NATIVE_CLIENT_SRC_UNTRUSTED_NACL_IRT_H_ */