import

qemu/main-loop.c

@@ -0,0 +1,139 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/* Modified for Unicorn Engine by Nguyen Anh Quynh, 2015 */
+
+#include "qemu-common.h"
+#include "qemu/timer.h"
+#include "qemu/main-loop.h"
+#include "qemu/thread.h"
+#include "qom/cpu.h"
+
+#include "uc_priv.h"
+
+#ifndef _WIN32
+#endif
+
+static void qemu_cpu_kick_thread(CPUState *cpu);
+
+void qemu_mutex_lock_iothread(struct uc_struct* uc)
+{
+    if (!uc->tcg_enabled(uc)) { // arch-dependent
+        qemu_mutex_lock(&uc->qemu_global_mutex);
+    } else {
+        if (qemu_mutex_trylock(&uc->qemu_global_mutex)) {
+            qemu_cpu_kick_thread(first_cpu);
+            qemu_mutex_lock(&uc->qemu_global_mutex);
+        }
+    }
+}
+
+void qemu_mutex_unlock_iothread(struct uc_struct* uc)
+{
+    qemu_mutex_unlock(&uc->qemu_global_mutex);
+}
+
+static void qemu_cpu_kick_thread(CPUState *cpu)
+{
+#ifndef _WIN32
+    int err;
+
+    err = pthread_kill(cpu->thread->thread, SIG_IPI);
+    if (err) {
+        fprintf(stderr, "qemu:%s: %s", __func__, strerror(err));
+        exit(1);
+    }
+#else /* _WIN32 */
+    if (!qemu_thread_is_self(cpu->thread)) {
+        CONTEXT tcgContext;
+
+        if (SuspendThread(cpu->hThread) == (DWORD)-1) {
+            fprintf(stderr, "qemu:%s: GetLastError:%lu\n", __func__,
+                    GetLastError());
+            exit(1);
+        }
+
+        /* On multi-core systems, we are not sure that the thread is actually
+         * suspended until we can get the context.
+         */
+        tcgContext.ContextFlags = CONTEXT_CONTROL;
+        while (GetThreadContext(cpu->hThread, &tcgContext) != 0) {
+            continue;
+        }
+
+				// FIXME(danghvu): anysignal ?
+        // cpu_signal(0);
+
+        if (ResumeThread(cpu->hThread) == (DWORD)-1) {
+            fprintf(stderr, "qemu:%s: GetLastError:%lu\n", __func__,
+                    GetLastError());
+            exit(1);
+        }
+    }
+#endif
+}
+
+
+#if 0
+static int qemu_signal_init(void)
+{
+    sigset_t set;
+
+    /*
+     * SIG_IPI must be blocked in the main thread and must not be caught
+     * by sigwait() in the signal thread. Otherwise, the cpu thread will
+     * not catch it reliably.
+     */
+    sigemptyset(&set);
+    sigaddset(&set, SIG_IPI);
+    sigaddset(&set, SIGIO);
+    sigaddset(&set, SIGALRM);
+    sigaddset(&set, SIGBUS);
+    /* SIGINT cannot be handled via signalfd, so that ^C can be used
+     * to interrupt QEMU when it is being run under gdb.  SIGHUP and
+     * SIGTERM are also handled asynchronously, even though it is not
+     * strictly necessary, because they use the same handler as SIGINT.
+     */
+    pthread_sigmask(SIG_BLOCK, &set, NULL);
+
+    sigdelset(&set, SIG_IPI);
+    return 0;
+}
+#endif
+
+/*
+static int qemu_signal_init(void)
+{
+    return 0;
+}*/
+
+/*
+static int qemu_init_main_loop(void)
+{
+    init_clocks();
+
+    return qemu_signal_init();
+}*/
+
+