Debug stub: suspend/resume threads on Linux

src/trusted/service_runtime/linux/thread_suspension.c

Index: src/trusted/service_runtime/linux/thread_suspension.c
diff --git a/src/trusted/service_runtime/linux/thread_suspension.c b/src/trusted/service_runtime/linux/thread_suspension.c
index ee4bda227928b47524dc0be0a87af0ee0fd8ef52..64035481c27ea11a58cfddf37d4c46d9434db1ef 100644
--- a/src/trusted/service_runtime/linux/thread_suspension.c
+++ b/src/trusted/service_runtime/linux/thread_suspension.c
@@ -245,3 +245,29 @@ void NaClUntrustedThreadsResumeAll(struct NaClApp *nap) {
 
   NaClXMutexUnlock(&nap->threads_mu);
 }
+
+
+void NaClUntrustedThreadsSuspendAll2(struct NaClApp *nap, struct NaClAppThread *signaled_natp) {
+  size_t index;
+
+  NaClXMutexLock(&nap->threads_mu);
+
+  for (index = 0; index < nap->threads.num_entries; index++) {
+    struct NaClAppThread *natp = NaClGetThreadMu(nap, (int) index);
+    if (natp != NULL && natp != signaled_natp) {
+      NaClUntrustedThreadSuspend(natp, 1/*save_registers*/);
+    }
+  }
+}
+
+void NaClUntrustedThreadsResumeAll2(struct NaClApp *nap, struct NaClAppThread *signaled_natp) {
+  size_t index;
+  for (index = 0; index < nap->threads.num_entries; index++) {
+    struct NaClAppThread *natp = NaClGetThreadMu(nap, (int) index);
+    if (natp != NULL && natp != signaled_natp) {
+      NaClUntrustedThreadResume(natp);
+    }
+  }
+
+  NaClXMutexUnlock(&nap->threads_mu);
+}