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483 lines
15 KiB
483 lines
15 KiB
/* Copyright (C) 2014 The Android Open Source Project
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This file implements interfaces from the file jvm.h. This implementation
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* is licensed under the same terms as the file jvm.h. The
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* copyright and license information for the file jvm.h follows.
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*
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* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* Services that OpenJDK expects the VM to provide.
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*/
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#include <dlfcn.h>
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#include <limits.h>
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#include <stdio.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <android-base/logging.h>
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#include "../../libcore/ojluni/src/main/native/jvm.h" // TODO(narayan): fix it
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#include "base/macros.h"
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#include "base/fast_exit.h"
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#include "common_throws.h"
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#include "gc/heap.h"
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#include "handle_scope-inl.h"
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#include "jni/java_vm_ext.h"
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#include "jni/jni_internal.h"
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#include "mirror/class_loader.h"
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#include "mirror/string-inl.h"
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#include "monitor.h"
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#include "native/scoped_fast_native_object_access-inl.h"
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#include "nativehelper/scoped_local_ref.h"
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#include "nativehelper/scoped_utf_chars.h"
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#include "runtime.h"
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#include "scoped_thread_state_change-inl.h"
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#include "thread.h"
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#include "thread_list.h"
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#include "verify_object.h"
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#undef LOG_TAG
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#define LOG_TAG "artopenjdk"
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/* posix open() with extensions; used by e.g. ZipFile */
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JNIEXPORT jint JVM_Open(const char* fname, jint flags, jint mode) {
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/*
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* Some code seems to want the special return value JVM_EEXIST if the
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* file open fails due to O_EXCL.
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*/
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// Don't use JVM_O_DELETE, it's problematic with FUSE, see b/28901232.
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if (flags & JVM_O_DELETE) {
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LOG(FATAL) << "JVM_O_DELETE option is not supported (while opening: '"
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<< fname << "')";
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}
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flags |= O_CLOEXEC;
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int fd = TEMP_FAILURE_RETRY(open(fname, flags & ~JVM_O_DELETE, mode));
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if (fd < 0) {
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int err = errno;
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if (err == EEXIST) {
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return JVM_EEXIST;
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} else {
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return -1;
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}
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}
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return fd;
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}
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/* posix close() */
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JNIEXPORT jint JVM_Close(jint fd) {
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// don't want TEMP_FAILURE_RETRY here -- file is closed even if EINTR
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return close(fd);
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}
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/* posix read() */
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JNIEXPORT jint JVM_Read(jint fd, char* buf, jint nbytes) {
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return TEMP_FAILURE_RETRY(read(fd, buf, nbytes));
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}
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/* posix write(); is used to write messages to stderr */
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JNIEXPORT jint JVM_Write(jint fd, char* buf, jint nbytes) {
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return TEMP_FAILURE_RETRY(write(fd, buf, nbytes));
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}
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/* posix lseek() */
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JNIEXPORT jlong JVM_Lseek(jint fd, jlong offset, jint whence) {
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#if !defined(__APPLE__)
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// NOTE: Using TEMP_FAILURE_RETRY here is busted for LP32 on glibc - the return
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// value will be coerced into an int32_t.
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//
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// lseek64 isn't specified to return EINTR so it shouldn't be necessary
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// anyway.
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return lseek64(fd, offset, whence);
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#else
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// NOTE: This code is compiled for Mac OS but isn't ever run on that
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// platform.
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return lseek(fd, offset, whence);
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#endif
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}
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/*
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* "raw monitors" seem to be expected to behave like non-recursive pthread
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* mutexes. They're used by ZipFile.
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*/
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JNIEXPORT void* JVM_RawMonitorCreate(void) {
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pthread_mutex_t* mutex =
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reinterpret_cast<pthread_mutex_t*>(malloc(sizeof(pthread_mutex_t)));
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CHECK(mutex != nullptr);
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CHECK_PTHREAD_CALL(pthread_mutex_init, (mutex, nullptr), "JVM_RawMonitorCreate");
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return mutex;
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}
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JNIEXPORT void JVM_RawMonitorDestroy(void* mon) {
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CHECK_PTHREAD_CALL(pthread_mutex_destroy,
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(reinterpret_cast<pthread_mutex_t*>(mon)),
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"JVM_RawMonitorDestroy");
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free(mon);
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}
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JNIEXPORT jint JVM_RawMonitorEnter(void* mon) {
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return pthread_mutex_lock(reinterpret_cast<pthread_mutex_t*>(mon));
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}
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JNIEXPORT void JVM_RawMonitorExit(void* mon) {
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CHECK_PTHREAD_CALL(pthread_mutex_unlock,
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(reinterpret_cast<pthread_mutex_t*>(mon)),
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"JVM_RawMonitorExit");
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}
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JNIEXPORT char* JVM_NativePath(char* path) {
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return path;
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}
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JNIEXPORT jint JVM_GetLastErrorString(char* buf, int len) {
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#if defined(__GLIBC__) || defined(__BIONIC__)
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if (len == 0) {
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return 0;
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}
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const int err = errno;
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char* result = strerror_r(err, buf, len);
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if (result != buf) {
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strncpy(buf, result, len);
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buf[len - 1] = '\0';
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}
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return strlen(buf);
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#else
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UNUSED(buf);
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UNUSED(len);
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return -1;
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#endif
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}
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JNIEXPORT int jio_fprintf(FILE* fp, const char* fmt, ...) {
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va_list args;
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va_start(args, fmt);
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int len = jio_vfprintf(fp, fmt, args);
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va_end(args);
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return len;
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}
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JNIEXPORT int jio_vfprintf(FILE* fp, const char* fmt, va_list args) {
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assert(fp != nullptr);
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return vfprintf(fp, fmt, args);
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}
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/* posix fsync() */
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JNIEXPORT jint JVM_Sync(jint fd) {
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return TEMP_FAILURE_RETRY(fsync(fd));
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}
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JNIEXPORT void* JVM_FindLibraryEntry(void* handle, const char* name) {
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return dlsym(handle, name);
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}
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JNIEXPORT jlong JVM_CurrentTimeMillis(JNIEnv* env ATTRIBUTE_UNUSED,
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jclass clazz ATTRIBUTE_UNUSED) {
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struct timeval tv;
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gettimeofday(&tv, (struct timezone *) nullptr);
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jlong when = tv.tv_sec * 1000LL + tv.tv_usec / 1000;
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return when;
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}
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JNIEXPORT jint JVM_Socket(jint domain, jint type, jint protocol) {
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return TEMP_FAILURE_RETRY(socket(domain, type, protocol));
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}
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JNIEXPORT jint JVM_InitializeSocketLibrary() {
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return 0;
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}
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int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
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if ((intptr_t)count <= 0) return -1;
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return vsnprintf(str, count, fmt, args);
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}
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int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
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va_list args;
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int len;
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va_start(args, fmt);
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len = jio_vsnprintf(str, count, fmt, args);
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va_end(args);
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return len;
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}
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JNIEXPORT jint JVM_SetSockOpt(jint fd, int level, int optname,
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const char* optval, int optlen) {
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return TEMP_FAILURE_RETRY(setsockopt(fd, level, optname, optval, optlen));
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}
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JNIEXPORT jint JVM_SocketShutdown(jint fd, jint howto) {
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return TEMP_FAILURE_RETRY(shutdown(fd, howto));
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}
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JNIEXPORT jint JVM_GetSockOpt(jint fd, int level, int optname, char* optval,
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int* optlen) {
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socklen_t len = *optlen;
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int cc = TEMP_FAILURE_RETRY(getsockopt(fd, level, optname, optval, &len));
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*optlen = len;
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return cc;
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}
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JNIEXPORT jint JVM_GetSockName(jint fd, struct sockaddr* addr, int* addrlen) {
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socklen_t len = *addrlen;
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int cc = TEMP_FAILURE_RETRY(getsockname(fd, addr, &len));
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*addrlen = len;
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return cc;
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}
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JNIEXPORT jint JVM_SocketAvailable(jint fd, jint* result) {
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if (TEMP_FAILURE_RETRY(ioctl(fd, FIONREAD, result)) < 0) {
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return JNI_FALSE;
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}
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return JNI_TRUE;
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}
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JNIEXPORT jint JVM_Send(jint fd, char* buf, jint nBytes, jint flags) {
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return TEMP_FAILURE_RETRY(send(fd, buf, nBytes, flags));
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}
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JNIEXPORT jint JVM_SocketClose(jint fd) {
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// Don't want TEMP_FAILURE_RETRY here -- file is closed even if EINTR.
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return close(fd);
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}
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JNIEXPORT jint JVM_Listen(jint fd, jint count) {
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return TEMP_FAILURE_RETRY(listen(fd, count));
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}
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JNIEXPORT jint JVM_Connect(jint fd, struct sockaddr* addr, jint addrlen) {
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return TEMP_FAILURE_RETRY(connect(fd, addr, addrlen));
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}
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JNIEXPORT int JVM_GetHostName(char* name, int namelen) {
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return TEMP_FAILURE_RETRY(gethostname(name, namelen));
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}
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JNIEXPORT jstring JVM_InternString(JNIEnv* env, jstring jstr) {
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art::ScopedFastNativeObjectAccess soa(env);
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art::ObjPtr<art::mirror::String> s = soa.Decode<art::mirror::String>(jstr);
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return soa.AddLocalReference<jstring>(s->Intern());
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}
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JNIEXPORT jlong JVM_FreeMemory(void) {
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return art::Runtime::Current()->GetHeap()->GetFreeMemory();
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}
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JNIEXPORT jlong JVM_TotalMemory(void) {
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return art::Runtime::Current()->GetHeap()->GetTotalMemory();
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}
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JNIEXPORT jlong JVM_MaxMemory(void) {
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return art::Runtime::Current()->GetHeap()->GetMaxMemory();
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}
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JNIEXPORT void JVM_GC(void) {
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if (art::Runtime::Current()->IsExplicitGcDisabled()) {
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LOG(INFO) << "Explicit GC skipped.";
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return;
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}
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art::Runtime::Current()->GetHeap()->CollectGarbage(/* clear_soft_references */ false);
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}
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JNIEXPORT __attribute__((noreturn)) void JVM_Exit(jint status) {
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LOG(INFO) << "System.exit called, status: " << status;
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art::Runtime::Current()->CallExitHook(status);
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// Unsafe to call exit() while threads may still be running. They would race
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// with static destructors.
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art::FastExit(status);
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}
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JNIEXPORT jstring JVM_NativeLoad(JNIEnv* env,
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jstring javaFilename,
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jobject javaLoader,
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jclass caller) {
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ScopedUtfChars filename(env, javaFilename);
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if (filename.c_str() == nullptr) {
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return nullptr;
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}
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std::string error_msg;
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{
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art::JavaVMExt* vm = art::Runtime::Current()->GetJavaVM();
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bool success = vm->LoadNativeLibrary(env,
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filename.c_str(),
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javaLoader,
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caller,
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&error_msg);
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if (success) {
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return nullptr;
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}
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}
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// Don't let a pending exception from JNI_OnLoad cause a CheckJNI issue with NewStringUTF.
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env->ExceptionClear();
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return env->NewStringUTF(error_msg.c_str());
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}
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JNIEXPORT void JVM_StartThread(JNIEnv* env, jobject jthread, jlong stack_size, jboolean daemon) {
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art::Thread::CreateNativeThread(env, jthread, stack_size, daemon == JNI_TRUE);
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}
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JNIEXPORT void JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio) {
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art::ScopedObjectAccess soa(env);
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art::MutexLock mu(soa.Self(), *art::Locks::thread_list_lock_);
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art::Thread* thread = art::Thread::FromManagedThread(soa, jthread);
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if (thread != nullptr) {
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thread->SetNativePriority(prio);
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}
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}
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JNIEXPORT void JVM_Yield(JNIEnv* env ATTRIBUTE_UNUSED, jclass threadClass ATTRIBUTE_UNUSED) {
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sched_yield();
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}
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JNIEXPORT void JVM_Sleep(JNIEnv* env, jclass threadClass ATTRIBUTE_UNUSED,
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jobject java_lock, jlong millis) {
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art::ScopedFastNativeObjectAccess soa(env);
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art::ObjPtr<art::mirror::Object> lock = soa.Decode<art::mirror::Object>(java_lock);
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art::Monitor::Wait(art::Thread::Current(), lock.Ptr(), millis, 0, true, art::kSleeping);
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}
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JNIEXPORT jobject JVM_CurrentThread(JNIEnv* env, jclass unused ATTRIBUTE_UNUSED) {
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art::ScopedFastNativeObjectAccess soa(env);
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return soa.AddLocalReference<jobject>(soa.Self()->GetPeer());
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}
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JNIEXPORT void JVM_Interrupt(JNIEnv* env, jobject jthread) {
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art::ScopedFastNativeObjectAccess soa(env);
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art::MutexLock mu(soa.Self(), *art::Locks::thread_list_lock_);
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art::Thread* thread = art::Thread::FromManagedThread(soa, jthread);
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if (thread != nullptr) {
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thread->Interrupt(soa.Self());
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}
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}
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JNIEXPORT jboolean JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clearInterrupted) {
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if (clearInterrupted) {
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return static_cast<art::JNIEnvExt*>(env)->GetSelf()->Interrupted() ? JNI_TRUE : JNI_FALSE;
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} else {
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art::ScopedFastNativeObjectAccess soa(env);
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art::MutexLock mu(soa.Self(), *art::Locks::thread_list_lock_);
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art::Thread* thread = art::Thread::FromManagedThread(soa, jthread);
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return (thread != nullptr) ? thread->IsInterrupted() : JNI_FALSE;
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}
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}
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JNIEXPORT jboolean JVM_HoldsLock(JNIEnv* env, jclass unused ATTRIBUTE_UNUSED, jobject jobj) {
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art::ScopedObjectAccess soa(env);
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art::ObjPtr<art::mirror::Object> object = soa.Decode<art::mirror::Object>(jobj);
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if (object == nullptr) {
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art::ThrowNullPointerException("object == null");
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return JNI_FALSE;
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}
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return soa.Self()->HoldsLock(object);
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}
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JNIEXPORT void JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring java_name) {
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ScopedUtfChars name(env, java_name);
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{
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art::ScopedObjectAccess soa(env);
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if (soa.Decode<art::mirror::Object>(jthread) == soa.Self()->GetPeer()) {
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soa.Self()->SetThreadName(name.c_str());
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return;
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}
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}
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// Suspend thread to avoid it from killing itself while we set its name. We don't just hold the
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// thread list lock to avoid this, as setting the thread name causes mutator to lock/unlock
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// in the DDMS send code.
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art::ThreadList* thread_list = art::Runtime::Current()->GetThreadList();
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bool timed_out;
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// Take suspend thread lock to avoid races with threads trying to suspend this one.
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art::Thread* thread;
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{
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thread = thread_list->SuspendThreadByPeer(jthread,
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true,
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art::SuspendReason::kInternal,
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&timed_out);
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}
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if (thread != nullptr) {
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{
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art::ScopedObjectAccess soa(env);
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thread->SetThreadName(name.c_str());
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}
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bool resumed = thread_list->Resume(thread, art::SuspendReason::kInternal);
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DCHECK(resumed);
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} else if (timed_out) {
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LOG(ERROR) << "Trying to set thread name to '" << name.c_str() << "' failed as the thread "
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"failed to suspend within a generous timeout.";
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}
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}
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JNIEXPORT __attribute__((noreturn)) jint JVM_IHashCode(JNIEnv* env ATTRIBUTE_UNUSED,
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jobject javaObject ATTRIBUTE_UNUSED) {
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UNIMPLEMENTED(FATAL) << "JVM_IHashCode is not implemented";
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UNREACHABLE();
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}
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JNIEXPORT __attribute__((noreturn)) jlong JVM_NanoTime(JNIEnv* env ATTRIBUTE_UNUSED, jclass unused ATTRIBUTE_UNUSED) {
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UNIMPLEMENTED(FATAL) << "JVM_NanoTime is not implemented";
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UNREACHABLE();
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}
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JNIEXPORT __attribute__((noreturn)) void JVM_ArrayCopy(JNIEnv* /* env */, jclass /* unused */, jobject /* javaSrc */,
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jint /* srcPos */, jobject /* javaDst */, jint /* dstPos */,
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|
jint /* length */) {
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UNIMPLEMENTED(FATAL) << "JVM_ArrayCopy is not implemented";
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UNREACHABLE();
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}
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JNIEXPORT __attribute__((noreturn)) jint JVM_FindSignal(const char* name ATTRIBUTE_UNUSED) {
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LOG(FATAL) << "JVM_FindSignal is not implemented";
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UNREACHABLE();
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}
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JNIEXPORT __attribute__((noreturn)) void* JVM_RegisterSignal(jint signum ATTRIBUTE_UNUSED, void* handler ATTRIBUTE_UNUSED) {
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LOG(FATAL) << "JVM_RegisterSignal is not implemented";
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UNREACHABLE();
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}
|
|
|
|
JNIEXPORT __attribute__((noreturn)) jboolean JVM_RaiseSignal(jint signum ATTRIBUTE_UNUSED) {
|
|
LOG(FATAL) << "JVM_RaiseSignal is not implemented";
|
|
UNREACHABLE();
|
|
}
|
|
|
|
JNIEXPORT __attribute__((noreturn)) void JVM_Halt(jint code) {
|
|
_exit(code);
|
|
}
|
|
|
|
JNIEXPORT jboolean JVM_IsNaN(jdouble d) {
|
|
return isnan(d);
|
|
}
|