Mercurial > hg > truffle
view src/os/bsd/vm/os_bsd.inline.hpp @ 20295:3f2894c5052e
8048112: G1 Full GC needs to support the case when the very first region is not available
Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett.
Reviewed-by: brutisso
author | tschatzl |
---|---|
date | Mon, 21 Jul 2014 10:00:31 +0200 |
parents | ce8f6bb717c9 |
children | 7848fc12602b |
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/* * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef OS_BSD_VM_OS_BSD_INLINE_HPP #define OS_BSD_VM_OS_BSD_INLINE_HPP #include "runtime/atomic.inline.hpp" #include "runtime/orderAccess.inline.hpp" #include "runtime/os.hpp" // System includes #include <unistd.h> #include <sys/socket.h> #include <sys/poll.h> #include <netdb.h> inline void* os::thread_local_storage_at(int index) { return pthread_getspecific((pthread_key_t)index); } inline const char* os::file_separator() { return "/"; } inline const char* os::line_separator() { return "\n"; } inline const char* os::path_separator() { return ":"; } // File names are case-sensitive on windows only inline int os::file_name_strcmp(const char* s1, const char* s2) { return strcmp(s1, s2); } inline bool os::obsolete_option(const JavaVMOption *option) { return false; } inline bool os::uses_stack_guard_pages() { return true; } inline bool os::allocate_stack_guard_pages() { assert(uses_stack_guard_pages(), "sanity check"); #if !defined(__FreeBSD__) || __FreeBSD__ < 5 // Since FreeBSD 4 uses malloc() for allocating the thread stack // there is no need to do anything extra to allocate the guard pages return false; #else // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks. // Must 'allocate' them or guard pages are ignored. return true; #endif } // On Bsd, reservations are made on a page by page basis, nothing to do. inline void os::pd_split_reserved_memory(char *base, size_t size, size_t split, bool realloc) { } // Bang the shadow pages if they need to be touched to be mapped. inline void os::bang_stack_shadow_pages() { } inline void os::dll_unload(void *lib) { ::dlclose(lib); } inline const int os::default_file_open_flags() { return 0;} inline DIR* os::opendir(const char* dirname) { assert(dirname != NULL, "just checking"); return ::opendir(dirname); } inline int os::readdir_buf_size(const char *path) { return NAME_MAX + sizeof(dirent) + 1; } inline jlong os::lseek(int fd, jlong offset, int whence) { return (jlong) ::lseek(fd, offset, whence); } inline int os::fsync(int fd) { return ::fsync(fd); } inline char* os::native_path(char *path) { return path; } inline int os::ftruncate(int fd, jlong length) { return ::ftruncate(fd, length); } inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) { dirent* p; int status; assert(dirp != NULL, "just checking"); // NOTE: Bsd readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX // version. Here is the doc for this function: // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { errno = status; return NULL; } else return p; } inline int os::closedir(DIR *dirp) { assert(dirp != NULL, "argument is NULL"); return ::closedir(dirp); } // macros for restartable system calls #define RESTARTABLE(_cmd, _result) do { \ _result = _cmd; \ } while(((int)_result == OS_ERR) && (errno == EINTR)) #define RESTARTABLE_RETURN_INT(_cmd) do { \ int _result; \ RESTARTABLE(_cmd, _result); \ return _result; \ } while(false) inline bool os::numa_has_static_binding() { return true; } inline bool os::numa_has_group_homing() { return false; } inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { size_t res; RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); return res; } inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { size_t res; RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); return res; } inline int os::close(int fd) { return ::close(fd); } inline int os::socket_close(int fd) { return ::close(fd); } inline int os::socket(int domain, int type, int protocol) { return ::socket(domain, type, protocol); } inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); } inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); } inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { return os::send(fd, buf, nBytes, flags); } inline int os::timeout(int fd, long timeout) { julong prevtime,newtime; struct timeval t; gettimeofday(&t, NULL); prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; for(;;) { struct pollfd pfd; pfd.fd = fd; pfd.events = POLLIN | POLLERR; int res = ::poll(&pfd, 1, timeout); if (res == OS_ERR && errno == EINTR) { // On Bsd any value < 0 means "forever" if(timeout >= 0) { gettimeofday(&t, NULL); newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; timeout -= newtime - prevtime; if(timeout <= 0) return OS_OK; prevtime = newtime; } } else return res; } } inline int os::listen(int fd, int count) { return ::listen(fd, count); } inline int os::connect(int fd, struct sockaddr* him, socklen_t len) { RESTARTABLE_RETURN_INT(::connect(fd, him, len)); } inline int os::accept(int fd, struct sockaddr* him, socklen_t* len) { // At least OpenBSD and FreeBSD can return EINTR from accept. RESTARTABLE_RETURN_INT(::accept(fd, him, len)); } inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, sockaddr* from, socklen_t* fromlen) { RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen)); } inline int os::sendto(int fd, char* buf, size_t len, uint flags, struct sockaddr *to, socklen_t tolen) { RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen)); } inline int os::socket_shutdown(int fd, int howto) { return ::shutdown(fd, howto); } inline int os::bind(int fd, struct sockaddr* him, socklen_t len) { return ::bind(fd, him, len); } inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) { return ::getsockname(fd, him, len); } inline int os::get_host_name(char* name, int namelen) { return ::gethostname(name, namelen); } inline struct hostent* os::get_host_by_name(char* name) { return ::gethostbyname(name); } inline int os::get_sock_opt(int fd, int level, int optname, char *optval, socklen_t* optlen) { return ::getsockopt(fd, level, optname, optval, optlen); } inline int os::set_sock_opt(int fd, int level, int optname, const char* optval, socklen_t optlen) { return ::setsockopt(fd, level, optname, optval, optlen); } #endif // OS_BSD_VM_OS_BSD_INLINE_HPP