4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2010 Red Hat, Inc.
7 * QEMU library functions on POSIX which are shared between QEMU and
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
29 /* The following block of code temporarily renames the daemon() function so the
30 compiler does not see the warning associated with it in stdlib.h on OSX */
32 #define daemon qemu_fake_daemon_function
35 extern int daemon(int, int);
38 #if defined(__linux__) && (defined(__x86_64__) || defined(__arm__))
39 /* Use 2 MiB alignment so transparent hugepages can be used by KVM.
40 Valgrind does not support alignments larger than 1 MiB,
41 therefore we need special code which handles running on Valgrind. */
42 # define QEMU_VMALLOC_ALIGN (512 * 4096)
43 #elif defined(__linux__) && defined(__s390x__)
44 /* Use 1 MiB (segment size) alignment so gmap can be used by KVM. */
45 # define QEMU_VMALLOC_ALIGN (256 * 4096)
47 # define QEMU_VMALLOC_ALIGN getpagesize()
53 #include <glib/gprintf.h>
55 #include "config-host.h"
56 #include "sysemu/sysemu.h"
58 #include "qemu/sockets.h"
63 #include <sys/syscall.h>
67 #include <sys/sysctl.h>
71 #include "../../tizen/src/emulator_common.h"
74 int qemu_get_thread_id(void)
76 #if defined(__linux__)
77 return syscall(SYS_gettid);
83 int qemu_daemon(int nochdir, int noclose)
85 return daemon(nochdir, noclose);
88 void *qemu_oom_check(void *ptr)
91 const char _msg[] = "Failed to allocate memory in qemu.";
92 char cmd[JAVA_MAX_COMMAND_LENGTH] = { 0, };
97 fprintf(stderr, "Failed to allocate memory: %s\n", strerror(errno));
99 len = strlen(JAVA_EXEFILE_PATH) + strlen(JAVA_EXEOPTION) +
100 strlen(JAR_SKINFILE) + strlen(JAVA_SIMPLEMODE_OPTION) +
102 if (len > JAVA_MAX_COMMAND_LENGTH) {
103 len = JAVA_MAX_COMMAND_LENGTH;
106 snprintf(cmd, len, "%s %s %s %s=\"%s\"",
107 JAVA_EXEFILE_PATH, JAVA_EXEOPTION, JAR_SKINFILE, JAVA_SIMPLEMODE_OPTION, _msg);
108 if (system(cmd) == -1) {
109 fprintf(stderr, "failed to execute this command: %s\n", cmd);
117 void *qemu_memalign(size_t alignment, size_t size)
121 if (alignment < sizeof(void*)) {
122 alignment = sizeof(void*);
125 #if defined(_POSIX_C_SOURCE) && !defined(__sun__)
127 ret = posix_memalign(&ptr, alignment, size);
129 fprintf(stderr, "Failed to allocate %zu B: %s\n",
130 size, strerror(ret));
133 #elif defined(CONFIG_BSD)
134 ptr = qemu_oom_check(valloc(size));
136 ptr = qemu_oom_check(memalign(alignment, size));
138 trace_qemu_memalign(alignment, size, ptr);
143 void *preallocated_ram_ptr = NULL;
144 int preallocated_ram_size = -1;
146 /* alloc shared memory pages */
147 void *qemu_anon_ram_alloc(size_t size)
150 if (size == preallocated_ram_size && preallocated_ram_ptr) {
151 void *ptr = preallocated_ram_ptr;
152 preallocated_ram_ptr = NULL;
153 preallocated_ram_size = -1;
157 size_t align = QEMU_VMALLOC_ALIGN;
158 size_t total = size + align - getpagesize();
159 void *ptr = mmap(0, total, PROT_READ | PROT_WRITE,
160 MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
161 size_t offset = QEMU_ALIGN_UP((uintptr_t)ptr, align) - (uintptr_t)ptr;
163 if (ptr == MAP_FAILED) {
171 munmap(ptr - offset, offset);
174 munmap(ptr + size, total - size);
177 trace_qemu_anon_ram_alloc(size, ptr);
181 void qemu_vfree(void *ptr)
183 trace_qemu_vfree(ptr);
187 void qemu_anon_ram_free(void *ptr, size_t size)
189 trace_qemu_anon_ram_free(ptr, size);
195 void qemu_set_block(int fd)
198 f = fcntl(fd, F_GETFL);
199 fcntl(fd, F_SETFL, f & ~O_NONBLOCK);
202 void qemu_set_nonblock(int fd)
205 f = fcntl(fd, F_GETFL);
206 fcntl(fd, F_SETFL, f | O_NONBLOCK);
209 int socket_set_fast_reuse(int fd)
213 ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
214 (const char *)&val, sizeof(val));
221 void qemu_set_cloexec(int fd)
224 f = fcntl(fd, F_GETFD);
225 fcntl(fd, F_SETFD, f | FD_CLOEXEC);
229 * Creates a pipe with FD_CLOEXEC set on both file descriptors
231 int qemu_pipe(int pipefd[2])
236 ret = pipe2(pipefd, O_CLOEXEC);
237 if (ret != -1 || errno != ENOSYS) {
243 qemu_set_cloexec(pipefd[0]);
244 qemu_set_cloexec(pipefd[1]);
250 int qemu_utimens(const char *path, const struct timespec *times)
252 struct timeval tv[2], tv_now;
255 #ifdef CONFIG_UTIMENSAT
258 ret = utimensat(AT_FDCWD, path, times, AT_SYMLINK_NOFOLLOW);
259 if (ret != -1 || errno != ENOSYS) {
263 /* Fallback: use utimes() instead of utimensat() */
265 /* happy if special cases */
266 if (times[0].tv_nsec == UTIME_OMIT && times[1].tv_nsec == UTIME_OMIT) {
269 if (times[0].tv_nsec == UTIME_NOW && times[1].tv_nsec == UTIME_NOW) {
270 return utimes(path, NULL);
273 /* prepare for hard cases */
274 if (times[0].tv_nsec == UTIME_NOW || times[1].tv_nsec == UTIME_NOW) {
275 gettimeofday(&tv_now, NULL);
277 if (times[0].tv_nsec == UTIME_OMIT || times[1].tv_nsec == UTIME_OMIT) {
281 for (i = 0; i < 2; i++) {
282 if (times[i].tv_nsec == UTIME_NOW) {
283 tv[i].tv_sec = tv_now.tv_sec;
284 tv[i].tv_usec = tv_now.tv_usec;
285 } else if (times[i].tv_nsec == UTIME_OMIT) {
286 tv[i].tv_sec = (i == 0) ? st.st_atime : st.st_mtime;
289 tv[i].tv_sec = times[i].tv_sec;
290 tv[i].tv_usec = times[i].tv_nsec / 1000;
294 return utimes(path, &tv[0]);
298 qemu_get_local_state_pathname(const char *relative_pathname)
300 return g_strdup_printf("%s/%s", CONFIG_QEMU_LOCALSTATEDIR,
304 void qemu_set_tty_echo(int fd, bool echo)
311 tty.c_lflag |= ECHO | ECHONL | ICANON | IEXTEN;
313 tty.c_lflag &= ~(ECHO | ECHONL | ICANON | IEXTEN);
316 tcsetattr(fd, TCSANOW, &tty);
319 static char exec_dir[PATH_MAX];
321 void qemu_init_exec_dir(const char *argv0)
327 assert(!exec_dir[0]);
329 #if defined(__linux__)
332 len = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
338 #elif defined(__FreeBSD__)
340 static int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
341 size_t len = sizeof(buf) - 1;
344 if (!sysctl(mib, ARRAY_SIZE(mib), buf, &len, NULL, 0) &&
346 buf[sizeof(buf) - 1] = '\0';
351 /* If we don't have any way of figuring out the actual executable
352 location then try argv[0]. */
357 p = realpath(argv0, buf);
364 pstrcpy(exec_dir, sizeof(exec_dir), dir);
367 char *qemu_get_exec_dir(void)
369 return g_strdup(exec_dir);