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src/hotspot/os/posix/os_posix.hpp

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   1 /*
   2  * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


  47   // The initial values exclude any guard pages (by HotSpot or libc).
  48   // set_minimum_stack_sizes() will add the size required for
  49   // HotSpot guard pages depending on page size and flag settings.
  50   // Libc guard pages are never considered by these values.
  51   static size_t _compiler_thread_min_stack_allowed;
  52   static size_t _java_thread_min_stack_allowed;
  53   static size_t _vm_internal_thread_min_stack_allowed;
  54 
  55 public:
  56   static void init(void);  // early initialization - no logging available
  57   static void init_2(void);// later initialization - logging available
  58 
  59   // Return default stack size for the specified thread type
  60   static size_t default_stack_size(os::ThreadType thr_type);
  61   // Check and sets minimum stack sizes
  62   static jint set_minimum_stack_sizes();
  63   static size_t get_initial_stack_size(ThreadType thr_type, size_t req_stack_size);
  64 
  65   // Returns true if signal is valid.
  66   static bool is_valid_signal(int sig);

  67 
  68   // Helper function, returns a string (e.g. "SIGILL") for a signal.
  69   // Returned string is a constant. For unknown signals "UNKNOWN" is returned.
  70   static const char* get_signal_name(int sig, char* out, size_t outlen);
  71 
  72   // Helper function, returns a signal number for a given signal name, e.g. 11
  73   // for "SIGSEGV". Name can be given with or without "SIG" prefix, so both
  74   // "SEGV" or "SIGSEGV" work. Name must be uppercase.
  75   // Returns -1 for an unknown signal name.
  76   static int get_signal_number(const char* signal_name);
  77 
  78   // Returns one-line short description of a signal set in a user provided buffer.
  79   static const char* describe_signal_set_short(const sigset_t* set, char* buffer, size_t size);
  80 
  81   // Prints a short one-line description of a signal set.
  82   static void print_signal_set_short(outputStream* st, const sigset_t* set);
  83 
  84   // unblocks the signal masks for current thread
  85   static int unblock_thread_signal_mask(const sigset_t *set);
  86 


   1 /*
   2  * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


  47   // The initial values exclude any guard pages (by HotSpot or libc).
  48   // set_minimum_stack_sizes() will add the size required for
  49   // HotSpot guard pages depending on page size and flag settings.
  50   // Libc guard pages are never considered by these values.
  51   static size_t _compiler_thread_min_stack_allowed;
  52   static size_t _java_thread_min_stack_allowed;
  53   static size_t _vm_internal_thread_min_stack_allowed;
  54 
  55 public:
  56   static void init(void);  // early initialization - no logging available
  57   static void init_2(void);// later initialization - logging available
  58 
  59   // Return default stack size for the specified thread type
  60   static size_t default_stack_size(os::ThreadType thr_type);
  61   // Check and sets minimum stack sizes
  62   static jint set_minimum_stack_sizes();
  63   static size_t get_initial_stack_size(ThreadType thr_type, size_t req_stack_size);
  64 
  65   // Returns true if signal is valid.
  66   static bool is_valid_signal(int sig);
  67   static bool is_sig_ignored(int sig);
  68 
  69   // Helper function, returns a string (e.g. "SIGILL") for a signal.
  70   // Returned string is a constant. For unknown signals "UNKNOWN" is returned.
  71   static const char* get_signal_name(int sig, char* out, size_t outlen);
  72 
  73   // Helper function, returns a signal number for a given signal name, e.g. 11
  74   // for "SIGSEGV". Name can be given with or without "SIG" prefix, so both
  75   // "SEGV" or "SIGSEGV" work. Name must be uppercase.
  76   // Returns -1 for an unknown signal name.
  77   static int get_signal_number(const char* signal_name);
  78 
  79   // Returns one-line short description of a signal set in a user provided buffer.
  80   static const char* describe_signal_set_short(const sigset_t* set, char* buffer, size_t size);
  81 
  82   // Prints a short one-line description of a signal set.
  83   static void print_signal_set_short(outputStream* st, const sigset_t* set);
  84 
  85   // unblocks the signal masks for current thread
  86   static int unblock_thread_signal_mask(const sigset_t *set);
  87 


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