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hotspot/src/os/solaris/vm/os_solaris.inline.hpp

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+/*
+ * Copyright 1997-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+inline const char* os::file_separator() { return "/"; }
+inline const char* os::line_separator() { return "\n"; }
+inline const char* os::path_separator() { return ":"; }
+
+inline const char* os::jlong_format_specifier()   { return "%lld"; }
+inline const char* os::julong_format_specifier()  { return "%llu"; }
+
+// 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::uses_stack_guard_pages() {
+  return true;
+}
+
+inline bool os::allocate_stack_guard_pages() {
+  assert(uses_stack_guard_pages(), "sanity check");
+  int r = thr_main() ;
+  guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
+  return r;
+}
+
+
+// On Solaris, reservations are made on a page by page basis, nothing to do.
+inline void os::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 DIR* os::opendir(const char* dirname)
+{
+  assert(dirname != NULL, "just checking");
+  return ::opendir(dirname);
+}
+
+inline int os::readdir_buf_size(const char *path)
+{
+  int size = pathconf(path, _PC_NAME_MAX);
+  return (size < 0 ? MAXPATHLEN : size) + sizeof(dirent) + 1;
+}
+
+inline struct dirent* os::readdir(DIR* dirp, dirent* dbuf)
+{
+  assert(dirp != NULL, "just checking");
+#if defined(_LP64) || defined(_GNU_SOURCE)
+  dirent* p;
+  int status;
+
+  if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
+    errno = status;
+    return NULL;
+  } else
+    return p;
+#else  // defined(_LP64) || defined(_GNU_SOURCE)
+  return ::readdir_r(dirp, dbuf);
+#endif // defined(_LP64) || defined(_GNU_SOURCE)
+}
+
+inline int os::closedir(DIR *dirp)
+{
+  assert(dirp != NULL, "just checking");
+  return ::closedir(dirp);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+// macros for interruptible io and system calls and system call restarting
+
+#define _INTERRUPTIBLE(_setup, _cmd, _result, _thread, _clear, _before, _after, _int_enable) \
+do { \
+  _setup; \
+  _before; \
+  OSThread* _osthread = _thread->osthread(); \
+  if (_int_enable && _thread->has_last_Java_frame()) { \
+    /* this is java interruptible io stuff */ \
+    if (os::is_interrupted(_thread, _clear))  { \
+      os::Solaris::bump_interrupted_before_count(); \
+      _result = OS_INTRPT; \
+    } else { \
+      /* _cmd always expands to an assignment to _result */ \
+      if ((_cmd) < 0 && errno == EINTR  \
+       && os::is_interrupted(_thread, _clear)) { \
+        os::Solaris::bump_interrupted_during_count(); \
+        _result = OS_INTRPT; \
+      } \
+    } \
+  } else { \
+    /* this is normal blocking io stuff */ \
+    _cmd; \
+  } \
+  _after; \
+} while(false)
+
+// Interruptible io support + restarting of interrupted system calls
+
+#ifndef ASSERT
+
+#define INTERRUPTIBLE(_cmd, _result, _clear) do { \
+  _INTERRUPTIBLE( JavaThread* _thread = (JavaThread*)ThreadLocalStorage::thread(),_result = _cmd, _result, _thread, _clear, , , UseVMInterruptibleIO); \
+} while((_result == OS_ERR) && (errno == EINTR))
+
+#else
+
+// This adds an assertion that it is only called from thread_in_native
+// The call overhead is skipped for performance in product mode
+#define INTERRUPTIBLE(_cmd, _result, _clear) do { \
+  _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible_native(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible_native(_thread), UseVMInterruptibleIO ); \
+} while((_result == OS_ERR) && (errno == EINTR))
+
+#endif
+
+// Used for calls from _thread_in_vm, not from _thread_in_native
+#define INTERRUPTIBLE_VM(_cmd, _result, _clear) do { \
+  _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible(_thread), UseVMInterruptibleIO ); \
+} while((_result == OS_ERR) && (errno == EINTR))
+
+/* Use NORESTART when the system call cannot return EINTR, when something other
+   than a system call is being invoked, or when the caller must do EINTR
+   handling. */
+
+#ifndef ASSERT
+
+#define INTERRUPTIBLE_NORESTART(_cmd, _result, _clear) \
+  _INTERRUPTIBLE( JavaThread* _thread = (JavaThread*)ThreadLocalStorage::thread(),_result = _cmd, _result, _thread, _clear, , , UseVMInterruptibleIO)
+
+#else
+
+// This adds an assertion that it is only called from thread_in_native
+// The call overhead is skipped for performance in product mode
+#define INTERRUPTIBLE_NORESTART(_cmd, _result, _clear) \
+  _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible_native(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible_native(_thread), UseVMInterruptibleIO )
+
+#endif
+
+// Don't attend to UseVMInterruptibleIO. Always allow interruption.
+// Also assumes that it is called from the _thread_blocked state.
+// Used by os_sleep().
+
+#define INTERRUPTIBLE_NORESTART_VM_ALWAYS(_cmd, _result, _thread, _clear) \
+  _INTERRUPTIBLE(os::Solaris::setup_interruptible_already_blocked(_thread), _result = _cmd, _result, _thread, _clear, , , true )
+
+#define INTERRUPTIBLE_RETURN_INT(_cmd, _clear) do { \
+  int _result; \
+  do { \
+    INTERRUPTIBLE(_cmd, _result, _clear); \
+  } while((_result == OS_ERR) && (errno == EINTR)); \
+  return _result; \
+} while(false)
+
+#define INTERRUPTIBLE_RETURN_INT_VM(_cmd, _clear) do { \
+  int _result; \
+  do { \
+    INTERRUPTIBLE_VM(_cmd, _result, _clear); \
+  } while((_result == OS_ERR) && (errno == EINTR)); \
+  return _result; \
+} while(false)
+
+#define INTERRUPTIBLE_RETURN_INT_NORESTART(_cmd, _clear) do { \
+  int _result; \
+  INTERRUPTIBLE_NORESTART(_cmd, _result, _clear); \
+  return _result; \
+} while(false)
+
+/* Use the RESTARTABLE macros when interruptible io is not needed */
+
+#define RESTARTABLE(_cmd, _result) do { \
+  do { \
+    _result = _cmd; \
+  } while((_result == OS_ERR) && (errno == EINTR)); \
+} while(false)
+
+#define RESTARTABLE_RETURN_INT(_cmd) do { \
+  int _result; \
+  RESTARTABLE(_cmd, _result); \
+  return _result; \
+} while(false)