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