--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/os/linux/os_linux.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,307 @@
+/*
+ * Copyright (c) 1999, 2017, 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_LINUX_VM_OS_LINUX_HPP
+#define OS_LINUX_VM_OS_LINUX_HPP
+
+// Linux_OS defines the interface to Linux operating systems
+
+// Information about the protection of the page at address '0' on this os.
+static bool zero_page_read_protected() { return true; }
+
+class Linux {
+ friend class os;
+ friend class TestReserveMemorySpecial;
+
+ static bool libjsig_is_loaded; // libjsig that interposes sigaction(),
+ // __sigaction(), signal() is loaded
+ static struct sigaction *(*get_signal_action)(int);
+ static struct sigaction *get_preinstalled_handler(int);
+ static void save_preinstalled_handler(int, struct sigaction&);
+
+ static void check_signal_handler(int sig);
+
+ static int (*_clock_gettime)(clockid_t, struct timespec *);
+ static int (*_pthread_getcpuclockid)(pthread_t, clockid_t *);
+ static int (*_pthread_setname_np)(pthread_t, const char*);
+
+ static address _initial_thread_stack_bottom;
+ static uintptr_t _initial_thread_stack_size;
+
+ static const char *_glibc_version;
+ static const char *_libpthread_version;
+
+ static bool _supports_fast_thread_cpu_time;
+
+ static GrowableArray<int>* _cpu_to_node;
+ static GrowableArray<int>* _nindex_to_node;
+
+ // 0x00000000 = uninitialized,
+ // 0x01000000 = kernel version unknown,
+ // otherwise a 32-bit number:
+ // Ox00AABBCC
+ // AA, Major Version
+ // BB, Minor Version
+ // CC, Fix Version
+ static uint32_t _os_version;
+
+ protected:
+
+ static julong _physical_memory;
+ static pthread_t _main_thread;
+ static Mutex* _createThread_lock;
+ static int _page_size;
+
+ static julong available_memory();
+ static julong physical_memory() { return _physical_memory; }
+ static void initialize_system_info();
+
+ static int commit_memory_impl(char* addr, size_t bytes, bool exec);
+ static int commit_memory_impl(char* addr, size_t bytes,
+ size_t alignment_hint, bool exec);
+
+ static void set_glibc_version(const char *s) { _glibc_version = s; }
+ static void set_libpthread_version(const char *s) { _libpthread_version = s; }
+
+ static void rebuild_cpu_to_node_map();
+ static void rebuild_nindex_to_node_map();
+ static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; }
+ static GrowableArray<int>* nindex_to_node() { return _nindex_to_node; }
+
+ static size_t find_large_page_size();
+ static size_t setup_large_page_size();
+
+ static bool setup_large_page_type(size_t page_size);
+ static bool transparent_huge_pages_sanity_check(bool warn, size_t pages_size);
+ static bool hugetlbfs_sanity_check(bool warn, size_t page_size);
+
+ static char* reserve_memory_special_shm(size_t bytes, size_t alignment, char* req_addr, bool exec);
+ static char* reserve_memory_special_huge_tlbfs(size_t bytes, size_t alignment, char* req_addr, bool exec);
+ static char* reserve_memory_special_huge_tlbfs_only(size_t bytes, char* req_addr, bool exec);
+ static char* reserve_memory_special_huge_tlbfs_mixed(size_t bytes, size_t alignment, char* req_addr, bool exec);
+
+ static bool release_memory_special_impl(char* base, size_t bytes);
+ static bool release_memory_special_shm(char* base, size_t bytes);
+ static bool release_memory_special_huge_tlbfs(char* base, size_t bytes);
+
+ static void print_full_memory_info(outputStream* st);
+ static void print_distro_info(outputStream* st);
+ static void print_libversion_info(outputStream* st);
+
+ public:
+ static bool _stack_is_executable;
+ static void *dlopen_helper(const char *name, char *ebuf, int ebuflen);
+ static void *dll_load_in_vmthread(const char *name, char *ebuf, int ebuflen);
+
+ static void init_thread_fpu_state();
+ static int get_fpu_control_word();
+ static void set_fpu_control_word(int fpu_control);
+ static pthread_t main_thread(void) { return _main_thread; }
+ // returns kernel thread id (similar to LWP id on Solaris), which can be
+ // used to access /proc
+ static pid_t gettid();
+ static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; }
+ static Mutex* createThread_lock(void) { return _createThread_lock; }
+ static void hotspot_sigmask(Thread* thread);
+
+ static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; }
+ static uintptr_t initial_thread_stack_size(void) { return _initial_thread_stack_size; }
+ static bool is_initial_thread(void);
+
+ static int page_size(void) { return _page_size; }
+ static void set_page_size(int val) { _page_size = val; }
+
+ static address ucontext_get_pc(const ucontext_t* uc);
+ static void ucontext_set_pc(ucontext_t* uc, address pc);
+ static intptr_t* ucontext_get_sp(const ucontext_t* uc);
+ static intptr_t* ucontext_get_fp(const ucontext_t* uc);
+
+ // For Analyzer Forte AsyncGetCallTrace profiling support:
+ //
+ // This interface should be declared in os_linux_i486.hpp, but
+ // that file provides extensions to the os class and not the
+ // Linux class.
+ static ExtendedPC fetch_frame_from_ucontext(Thread* thread, const ucontext_t* uc,
+ intptr_t** ret_sp, intptr_t** ret_fp);
+
+ static bool get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr);
+
+ // This boolean allows users to forward their own non-matching signals
+ // to JVM_handle_linux_signal, harmlessly.
+ static bool signal_handlers_are_installed;
+
+ static int get_our_sigflags(int);
+ static void set_our_sigflags(int, int);
+ static void signal_sets_init();
+ static void install_signal_handlers();
+ static void set_signal_handler(int, bool);
+ static bool is_sig_ignored(int sig);
+
+ static sigset_t* unblocked_signals();
+ static sigset_t* vm_signals();
+
+ // For signal-chaining
+ static struct sigaction *get_chained_signal_action(int sig);
+ static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
+
+ // GNU libc and libpthread version strings
+ static const char *glibc_version() { return _glibc_version; }
+ static const char *libpthread_version() { return _libpthread_version; }
+
+ static void libpthread_init();
+ static void sched_getcpu_init();
+ static bool libnuma_init();
+ static void* libnuma_dlsym(void* handle, const char* name);
+ // libnuma v2 (libnuma_1.2) symbols
+ static void* libnuma_v2_dlsym(void* handle, const char* name);
+
+ // Return default guard size for the specified thread type
+ static size_t default_guard_size(os::ThreadType thr_type);
+
+ static void capture_initial_stack(size_t max_size);
+
+ // Stack overflow handling
+ static bool manually_expand_stack(JavaThread * t, address addr);
+ static int max_register_window_saves_before_flushing();
+
+ // Real-time clock functions
+ static void clock_init(void);
+
+ // fast POSIX clocks support
+ static void fast_thread_clock_init(void);
+
+ static int clock_gettime(clockid_t clock_id, struct timespec *tp) {
+ return _clock_gettime ? _clock_gettime(clock_id, tp) : -1;
+ }
+
+ static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) {
+ return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1;
+ }
+
+ static bool supports_fast_thread_cpu_time() {
+ return _supports_fast_thread_cpu_time;
+ }
+
+ static jlong fast_thread_cpu_time(clockid_t clockid);
+
+ static void initialize_os_info();
+ static bool os_version_is_known();
+ static uint32_t os_version();
+
+ // Stack repair handling
+
+ // none present
+
+ private:
+ typedef int (*sched_getcpu_func_t)(void);
+ typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
+ typedef int (*numa_max_node_func_t)(void);
+ typedef int (*numa_num_configured_nodes_func_t)(void);
+ typedef int (*numa_available_func_t)(void);
+ typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node);
+ typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask);
+ typedef void (*numa_interleave_memory_v2_func_t)(void *start, size_t size, struct bitmask* mask);
+
+ typedef void (*numa_set_bind_policy_func_t)(int policy);
+ typedef int (*numa_bitmask_isbitset_func_t)(struct bitmask *bmp, unsigned int n);
+ typedef int (*numa_distance_func_t)(int node1, int node2);
+
+ static sched_getcpu_func_t _sched_getcpu;
+ static numa_node_to_cpus_func_t _numa_node_to_cpus;
+ static numa_max_node_func_t _numa_max_node;
+ static numa_num_configured_nodes_func_t _numa_num_configured_nodes;
+ static numa_available_func_t _numa_available;
+ static numa_tonode_memory_func_t _numa_tonode_memory;
+ static numa_interleave_memory_func_t _numa_interleave_memory;
+ static numa_interleave_memory_v2_func_t _numa_interleave_memory_v2;
+ static numa_set_bind_policy_func_t _numa_set_bind_policy;
+ static numa_bitmask_isbitset_func_t _numa_bitmask_isbitset;
+ static numa_distance_func_t _numa_distance;
+ static unsigned long* _numa_all_nodes;
+ static struct bitmask* _numa_all_nodes_ptr;
+ static struct bitmask* _numa_nodes_ptr;
+
+ static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; }
+ static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; }
+ static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; }
+ static void set_numa_num_configured_nodes(numa_num_configured_nodes_func_t func) { _numa_num_configured_nodes = func; }
+ static void set_numa_available(numa_available_func_t func) { _numa_available = func; }
+ static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; }
+ static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; }
+ static void set_numa_interleave_memory_v2(numa_interleave_memory_v2_func_t func) { _numa_interleave_memory_v2 = func; }
+ static void set_numa_set_bind_policy(numa_set_bind_policy_func_t func) { _numa_set_bind_policy = func; }
+ static void set_numa_bitmask_isbitset(numa_bitmask_isbitset_func_t func) { _numa_bitmask_isbitset = func; }
+ static void set_numa_distance(numa_distance_func_t func) { _numa_distance = func; }
+ static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; }
+ static void set_numa_all_nodes_ptr(struct bitmask **ptr) { _numa_all_nodes_ptr = *ptr; }
+ static void set_numa_nodes_ptr(struct bitmask **ptr) { _numa_nodes_ptr = *ptr; }
+ static int sched_getcpu_syscall(void);
+ public:
+ static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; }
+ static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) {
+ return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1;
+ }
+ static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; }
+ static int numa_num_configured_nodes() {
+ return _numa_num_configured_nodes != NULL ? _numa_num_configured_nodes() : -1;
+ }
+ static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; }
+ static int numa_tonode_memory(void *start, size_t size, int node) {
+ return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1;
+ }
+ static void numa_interleave_memory(void *start, size_t size) {
+ // Use v2 api if available
+ if (_numa_interleave_memory_v2 != NULL && _numa_all_nodes_ptr != NULL) {
+ _numa_interleave_memory_v2(start, size, _numa_all_nodes_ptr);
+ } else if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) {
+ _numa_interleave_memory(start, size, _numa_all_nodes);
+ }
+ }
+ static void numa_set_bind_policy(int policy) {
+ if (_numa_set_bind_policy != NULL) {
+ _numa_set_bind_policy(policy);
+ }
+ }
+ static int numa_distance(int node1, int node2) {
+ return _numa_distance != NULL ? _numa_distance(node1, node2) : -1;
+ }
+ static int get_node_by_cpu(int cpu_id);
+ static int get_existing_num_nodes();
+ // Check if numa node is configured (non-zero memory node).
+ static bool isnode_in_configured_nodes(unsigned int n) {
+ if (_numa_bitmask_isbitset != NULL && _numa_all_nodes_ptr != NULL) {
+ return _numa_bitmask_isbitset(_numa_all_nodes_ptr, n);
+ } else
+ return 0;
+ }
+ // Check if numa node exists in the system (including zero memory nodes).
+ static bool isnode_in_existing_nodes(unsigned int n) {
+ if (_numa_bitmask_isbitset != NULL && _numa_nodes_ptr != NULL) {
+ return _numa_bitmask_isbitset(_numa_nodes_ptr, n);
+ } else
+ return 0;
+ }
+};
+
+#endif // OS_LINUX_VM_OS_LINUX_HPP