Mercurial > hg > graal-compiler
view src/os/windows/vm/os_windows.inline.hpp @ 21723:ce6b8ee2c6f2
Improve implicit null check elimination to be aware of guards.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Thu, 04 Jun 2015 16:15:14 +0200 |
parents | 7848fc12602b |
children |
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/* * Copyright (c) 1997, 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_WINDOWS_VM_OS_WINDOWS_INLINE_HPP #define OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP #include "runtime/atomic.inline.hpp" #include "runtime/orderAccess.inline.hpp" #include "runtime/os.hpp" inline const char* os::file_separator() { return "\\"; } inline const char* os::line_separator() { return "\r\n"; } inline const char* os::path_separator() { return ";"; } inline const char* os::dll_file_extension() { return ".dll"; } inline const int os::default_file_open_flags() { return O_BINARY | O_NOINHERIT;} // File names are case-insensitive on windows only inline int os::file_name_strcmp(const char* s, const char* t) { return _stricmp(s, t); } inline void os::dll_unload(void *lib) { ::FreeLibrary((HMODULE)lib); } inline void* os::dll_lookup(void *lib, const char *name) { return (void*)::GetProcAddress((HMODULE)lib, name); } // Used to improve time-sharing on some systems inline void os::loop_breaker(int attempts) {} inline bool os::obsolete_option(const JavaVMOption *option) { return false; } inline bool os::uses_stack_guard_pages() { return os::win32::is_nt(); } inline bool os::allocate_stack_guard_pages() { assert(uses_stack_guard_pages(), "sanity check"); return true; } inline int os::readdir_buf_size(const char *path) { /* As Windows doesn't use the directory entry buffer passed to os::readdir() this can be as short as possible */ return 1; } // Bang the shadow pages if they need to be touched to be mapped. inline void os::bang_stack_shadow_pages() { // Write to each page of our new frame to force OS mapping. // If we decrement stack pointer more than one page // the OS may not map an intervening page into our space // and may fault on a memory access to interior of our frame. address sp = current_stack_pointer(); for (int pages = 1; pages <= StackShadowPages; pages++) { *((int *)(sp - (pages * vm_page_size()))) = 0; } } inline bool os::numa_has_static_binding() { return true; } inline bool os::numa_has_group_homing() { return false; } inline size_t os::read(int fd, void *buf, unsigned int nBytes) { return ::read(fd, buf, nBytes); } inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { return ::read(fd, buf, nBytes); } inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { return ::write(fd, buf, nBytes); } inline int os::close(int fd) { return ::close(fd); } #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) \ os::win32::call_test_func_with_wrapper(f) #endif // OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP