Thread suspension: Implement for Linux

src/trusted/service_runtime/sel_ldr.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.
  */
 
 /*
  * NaCl Simple/secure ELF loader (NaCl SEL).
  *
  * This loader can only process NaCl object files as produced using
@@ skipping 736 matching lines @@
  * Invoked while holding the VM lock.  Check that no I/O is pending;
  * abort the app if the app is racing I/O operations against VM
  * operations.
  */
 void NaClVmIoPendingCheck_mu(struct NaClApp *nap,
                              uint32_t addr_first_usr,
                              uint32_t addr_last_usr);
 
 void NaClGdbHook(struct NaClApp const *nap);
 
-#if NACL_WINDOWS
-
 void NaClUntrustedThreadSuspend(struct NaClAppThread *natp);
 void NaClUntrustedThreadResume(struct NaClAppThread *natp);
 void NaClUntrustedThreadsSuspendAll(struct NaClApp *nap);
 void NaClUntrustedThreadsResumeAll(struct NaClApp *nap);
 
-#else
+#if NACL_LINUX
 
-static INLINE void NaClUntrustedThreadsSuspendAll(struct NaClApp *nap) {
-  UNREFERENCED_PARAMETER(nap);
-  NaClLog(LOG_FATAL, "NaClUntrustedThreadsSuspendAll: Not implemented\n");
-}
+void NaClSuspendSignalHandler(void);
 
-static INLINE void NaClUntrustedThreadsResumeAll(struct NaClApp *nap) {
-  UNREFERENCED_PARAMETER(nap);
-  NaClLog(LOG_FATAL, "NaClUntrustedThreadsResumeAll: Not implemented\n");
-}
+void handle_r_debug(const char *switch_value, char *argv0);
 
 #endif
 
-#if NACL_LINUX
-void handle_r_debug(const char *switch_value, char *argv0);
-#endif
-
 EXTERN_C_END
 
 #endif  /* NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_SEL_LDR_H_ */