| /* |
| * Copyright (c) 1997, 2016, 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 SHARE_VM_RUNTIME_OS_HPP |
| #define SHARE_VM_RUNTIME_OS_HPP |
| |
| #include "jvmtifiles/jvmti.h" |
| #include "runtime/extendedPC.hpp" |
| #include "runtime/handles.hpp" |
| #include "utilities/top.hpp" |
| #ifdef TARGET_OS_FAMILY_linux |
| # include "jvm_linux.h" |
| # include <setjmp.h> |
| #endif |
| #ifdef TARGET_OS_FAMILY_solaris |
| # include "jvm_solaris.h" |
| # include <setjmp.h> |
| #endif |
| #ifdef TARGET_OS_FAMILY_windows |
| # include "jvm_windows.h" |
| #endif |
| #ifdef TARGET_OS_FAMILY_aix |
| # include "jvm_aix.h" |
| # include <setjmp.h> |
| #endif |
| #ifdef TARGET_OS_FAMILY_bsd |
| # include "jvm_bsd.h" |
| # include <setjmp.h> |
| # ifdef __APPLE__ |
| # include <mach/mach_time.h> |
| # endif |
| #endif |
| |
| class AgentLibrary; |
| |
| // os defines the interface to operating system; this includes traditional |
| // OS services (time, I/O) as well as other functionality with system- |
| // dependent code. |
| |
| typedef void (*dll_func)(...); |
| |
| class Thread; |
| class JavaThread; |
| class Event; |
| class DLL; |
| class FileHandle; |
| class NativeCallStack; |
| |
| template<class E> class GrowableArray; |
| |
| // %%%%% Moved ThreadState, START_FN, OSThread to new osThread.hpp. -- Rose |
| |
| // Platform-independent error return values from OS functions |
| enum OSReturn { |
| OS_OK = 0, // Operation was successful |
| OS_ERR = -1, // Operation failed |
| OS_INTRPT = -2, // Operation was interrupted |
| OS_TIMEOUT = -3, // Operation timed out |
| OS_NOMEM = -5, // Operation failed for lack of memory |
| OS_NORESOURCE = -6 // Operation failed for lack of nonmemory resource |
| }; |
| |
| enum ThreadPriority { // JLS 20.20.1-3 |
| NoPriority = -1, // Initial non-priority value |
| MinPriority = 1, // Minimum priority |
| NormPriority = 5, // Normal (non-daemon) priority |
| NearMaxPriority = 9, // High priority, used for VMThread |
| MaxPriority = 10, // Highest priority, used for WatcherThread |
| // ensures that VMThread doesn't starve profiler |
| CriticalPriority = 11 // Critical thread priority |
| }; |
| |
| // Executable parameter flag for os::commit_memory() and |
| // os::commit_memory_or_exit(). |
| const bool ExecMem = true; |
| |
| // Typedef for structured exception handling support |
| typedef void (*java_call_t)(JavaValue* value, const methodHandle& method, JavaCallArguments* args, Thread* thread); |
| |
| class MallocTracker; |
| |
| class os: AllStatic { |
| friend class VMStructs; |
| friend class JVMCIVMStructs; |
| friend class MallocTracker; |
| public: |
| enum { page_sizes_max = 9 }; // Size of _page_sizes array (8 plus a sentinel) |
| |
| private: |
| static OSThread* _starting_thread; |
| static address _polling_page; |
| static volatile int32_t * _mem_serialize_page; |
| static uintptr_t _serialize_page_mask; |
| public: |
| static size_t _page_sizes[page_sizes_max]; |
| |
| private: |
| static void init_page_sizes(size_t default_page_size) { |
| _page_sizes[0] = default_page_size; |
| _page_sizes[1] = 0; // sentinel |
| } |
| |
| static char* pd_reserve_memory(size_t bytes, char* addr = 0, |
| size_t alignment_hint = 0); |
| static char* pd_attempt_reserve_memory_at(size_t bytes, char* addr); |
| static void pd_split_reserved_memory(char *base, size_t size, |
| size_t split, bool realloc); |
| static bool pd_commit_memory(char* addr, size_t bytes, bool executable); |
| static bool pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
| bool executable); |
| // Same as pd_commit_memory() that either succeeds or calls |
| // vm_exit_out_of_memory() with the specified mesg. |
| static void pd_commit_memory_or_exit(char* addr, size_t bytes, |
| bool executable, const char* mesg); |
| static void pd_commit_memory_or_exit(char* addr, size_t size, |
| size_t alignment_hint, |
| bool executable, const char* mesg); |
| static bool pd_uncommit_memory(char* addr, size_t bytes); |
| static bool pd_release_memory(char* addr, size_t bytes); |
| |
| static char* pd_map_memory(int fd, const char* file_name, size_t file_offset, |
| char *addr, size_t bytes, bool read_only = false, |
| bool allow_exec = false); |
| static char* pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
| char *addr, size_t bytes, bool read_only, |
| bool allow_exec); |
| static bool pd_unmap_memory(char *addr, size_t bytes); |
| static void pd_free_memory(char *addr, size_t bytes, size_t alignment_hint); |
| static void pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint); |
| |
| static size_t page_size_for_region(size_t region_size, size_t min_pages, bool must_be_aligned); |
| |
| // Get summary strings for system information in buffer provided |
| static void get_summary_cpu_info(char* buf, size_t buflen); |
| static void get_summary_os_info(char* buf, size_t buflen); |
| |
| public: |
| static void init(void); // Called before command line parsing |
| static void init_before_ergo(void); // Called after command line parsing |
| // before VM ergonomics processing. |
| static jint init_2(void); // Called after command line parsing |
| // and VM ergonomics processing |
| static void init_globals(void) { // Called from init_globals() in init.cpp |
| init_globals_ext(); |
| } |
| |
| // File names are case-insensitive on windows only |
| // Override me as needed |
| static int file_name_strcmp(const char* s1, const char* s2); |
| |
| // unset environment variable |
| static bool unsetenv(const char* name); |
| |
| static bool have_special_privileges(); |
| |
| static jlong javaTimeMillis(); |
| static jlong javaTimeNanos(); |
| static void javaTimeNanos_info(jvmtiTimerInfo *info_ptr); |
| static void javaTimeSystemUTC(jlong &seconds, jlong &nanos); |
| static void run_periodic_checks(); |
| static bool supports_monotonic_clock(); |
| |
| // Returns the elapsed time in seconds since the vm started. |
| static double elapsedTime(); |
| |
| // Returns real time in seconds since an arbitrary point |
| // in the past. |
| static bool getTimesSecs(double* process_real_time, |
| double* process_user_time, |
| double* process_system_time); |
| |
| // Interface to the performance counter |
| static jlong elapsed_counter(); |
| static jlong elapsed_frequency(); |
| |
| // The "virtual time" of a thread is the amount of time a thread has |
| // actually run. The first function indicates whether the OS supports |
| // this functionality for the current thread, and if so: |
| // * the second enables vtime tracking (if that is required). |
| // * the third tells whether vtime is enabled. |
| // * the fourth returns the elapsed virtual time for the current |
| // thread. |
| static bool supports_vtime(); |
| static bool enable_vtime(); |
| static bool vtime_enabled(); |
| static double elapsedVTime(); |
| |
| // Return current local time in a string (YYYY-MM-DD HH:MM:SS). |
| // It is MT safe, but not async-safe, as reading time zone |
| // information may require a lock on some platforms. |
| static char* local_time_string(char *buf, size_t buflen); |
| static struct tm* localtime_pd (const time_t* clock, struct tm* res); |
| // Fill in buffer with current local time as an ISO-8601 string. |
| // E.g., YYYY-MM-DDThh:mm:ss.mmm+zzzz. |
| // Returns buffer, or NULL if it failed. |
| static char* iso8601_time(char* buffer, size_t buffer_length); |
| |
| // Interface for detecting multiprocessor system |
| static inline bool is_MP() { |
| // During bootstrap if _processor_count is not yet initialized |
| // we claim to be MP as that is safest. If any platform has a |
| // stub generator that might be triggered in this phase and for |
| // which being declared MP when in fact not, is a problem - then |
| // the bootstrap routine for the stub generator needs to check |
| // the processor count directly and leave the bootstrap routine |
| // in place until called after initialization has ocurred. |
| return (_processor_count != 1) || AssumeMP; |
| } |
| static julong available_memory(); |
| static julong physical_memory(); |
| static bool has_allocatable_memory_limit(julong* limit); |
| static bool is_server_class_machine(); |
| |
| // number of CPUs |
| static int processor_count() { |
| return _processor_count; |
| } |
| static void set_processor_count(int count) { _processor_count = count; } |
| |
| // Returns the number of CPUs this process is currently allowed to run on. |
| // Note that on some OSes this can change dynamically. |
| static int active_processor_count(); |
| |
| // Bind processes to processors. |
| // This is a two step procedure: |
| // first you generate a distribution of processes to processors, |
| // then you bind processes according to that distribution. |
| // Compute a distribution for number of processes to processors. |
| // Stores the processor id's into the distribution array argument. |
| // Returns true if it worked, false if it didn't. |
| static bool distribute_processes(uint length, uint* distribution); |
| // Binds the current process to a processor. |
| // Returns true if it worked, false if it didn't. |
| static bool bind_to_processor(uint processor_id); |
| |
| // Give a name to the current thread. |
| static void set_native_thread_name(const char *name); |
| |
| // Interface for stack banging (predetect possible stack overflow for |
| // exception processing) There are guard pages, and above that shadow |
| // pages for stack overflow checking. |
| static bool uses_stack_guard_pages(); |
| static bool allocate_stack_guard_pages(); |
| static void map_stack_shadow_pages(); |
| static bool stack_shadow_pages_available(Thread *thread, const methodHandle& method); |
| |
| // OS interface to Virtual Memory |
| |
| // Return the default page size. |
| static int vm_page_size(); |
| |
| // Returns the page size to use for a region of memory. |
| // region_size / min_pages will always be greater than or equal to the |
| // returned value. The returned value will divide region_size. |
| static size_t page_size_for_region_aligned(size_t region_size, size_t min_pages); |
| |
| // Returns the page size to use for a region of memory. |
| // region_size / min_pages will always be greater than or equal to the |
| // returned value. The returned value might not divide region_size. |
| static size_t page_size_for_region_unaligned(size_t region_size, size_t min_pages); |
| |
| // Return the largest page size that can be used |
| static size_t max_page_size() { |
| // The _page_sizes array is sorted in descending order. |
| return _page_sizes[0]; |
| } |
| |
| // Methods for tracing page sizes returned by the above method; enabled by |
| // TracePageSizes. The region_{min,max}_size parameters should be the values |
| // passed to page_size_for_region() and page_size should be the result of that |
| // call. The (optional) base and size parameters should come from the |
| // ReservedSpace base() and size() methods. |
| static void trace_page_sizes(const char* str, const size_t* page_sizes, |
| int count) PRODUCT_RETURN; |
| static void trace_page_sizes(const char* str, const size_t region_min_size, |
| const size_t region_max_size, |
| const size_t page_size, |
| const char* base = NULL, |
| const size_t size = 0) PRODUCT_RETURN; |
| |
| static int vm_allocation_granularity(); |
| static char* reserve_memory(size_t bytes, char* addr = 0, |
| size_t alignment_hint = 0); |
| static char* reserve_memory(size_t bytes, char* addr, |
| size_t alignment_hint, MEMFLAGS flags); |
| static char* reserve_memory_aligned(size_t size, size_t alignment); |
| static char* attempt_reserve_memory_at(size_t bytes, char* addr); |
| static void split_reserved_memory(char *base, size_t size, |
| size_t split, bool realloc); |
| static bool commit_memory(char* addr, size_t bytes, bool executable); |
| static bool commit_memory(char* addr, size_t size, size_t alignment_hint, |
| bool executable); |
| // Same as commit_memory() that either succeeds or calls |
| // vm_exit_out_of_memory() with the specified mesg. |
| static void commit_memory_or_exit(char* addr, size_t bytes, |
| bool executable, const char* mesg); |
| static void commit_memory_or_exit(char* addr, size_t size, |
| size_t alignment_hint, |
| bool executable, const char* mesg); |
| static bool uncommit_memory(char* addr, size_t bytes); |
| static bool release_memory(char* addr, size_t bytes); |
| |
| // Touch memory pages that cover the memory range from start to end (exclusive) |
| // to make the OS back the memory range with actual memory. |
| // Current implementation may not touch the last page if unaligned addresses |
| // are passed. |
| static void pretouch_memory(char* start, char* end); |
| |
| enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX }; |
| static bool protect_memory(char* addr, size_t bytes, ProtType prot, |
| bool is_committed = true); |
| |
| static bool guard_memory(char* addr, size_t bytes); |
| static bool unguard_memory(char* addr, size_t bytes); |
| static bool create_stack_guard_pages(char* addr, size_t bytes); |
| static bool pd_create_stack_guard_pages(char* addr, size_t bytes); |
| static bool remove_stack_guard_pages(char* addr, size_t bytes); |
| |
| static char* map_memory(int fd, const char* file_name, size_t file_offset, |
| char *addr, size_t bytes, bool read_only = false, |
| bool allow_exec = false); |
| static char* remap_memory(int fd, const char* file_name, size_t file_offset, |
| char *addr, size_t bytes, bool read_only, |
| bool allow_exec); |
| static bool unmap_memory(char *addr, size_t bytes); |
| static void free_memory(char *addr, size_t bytes, size_t alignment_hint); |
| static void realign_memory(char *addr, size_t bytes, size_t alignment_hint); |
| |
| // NUMA-specific interface |
| static bool numa_has_static_binding(); |
| static bool numa_has_group_homing(); |
| static void numa_make_local(char *addr, size_t bytes, int lgrp_hint); |
| static void numa_make_global(char *addr, size_t bytes); |
| static size_t numa_get_groups_num(); |
| static size_t numa_get_leaf_groups(int *ids, size_t size); |
| static bool numa_topology_changed(); |
| static int numa_get_group_id(); |
| |
| // Page manipulation |
| struct page_info { |
| size_t size; |
| int lgrp_id; |
| }; |
| static bool get_page_info(char *start, page_info* info); |
| static char* scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found); |
| |
| static char* non_memory_address_word(); |
| // reserve, commit and pin the entire memory region |
| static char* reserve_memory_special(size_t size, size_t alignment, |
| char* addr, bool executable); |
| static bool release_memory_special(char* addr, size_t bytes); |
| static void large_page_init(); |
| static size_t large_page_size(); |
| static bool can_commit_large_page_memory(); |
| static bool can_execute_large_page_memory(); |
| |
| // OS interface to polling page |
| static address get_polling_page() { return _polling_page; } |
| static void set_polling_page(address page) { _polling_page = page; } |
| static bool is_poll_address(address addr) { return addr >= _polling_page && addr < (_polling_page + os::vm_page_size()); } |
| static void make_polling_page_unreadable(); |
| static void make_polling_page_readable(); |
| |
| // Routines used to serialize the thread state without using membars |
| static void serialize_thread_states(); |
| |
| // Since we write to the serialize page from every thread, we |
| // want stores to be on unique cache lines whenever possible |
| // in order to minimize CPU cross talk. We pre-compute the |
| // amount to shift the thread* to make this offset unique to |
| // each thread. |
| static int get_serialize_page_shift_count() { |
| return SerializePageShiftCount; |
| } |
| |
| static void set_serialize_page_mask(uintptr_t mask) { |
| _serialize_page_mask = mask; |
| } |
| |
| static unsigned int get_serialize_page_mask() { |
| return _serialize_page_mask; |
| } |
| |
| static void set_memory_serialize_page(address page); |
| |
| static address get_memory_serialize_page() { |
| return (address)_mem_serialize_page; |
| } |
| |
| static inline void write_memory_serialize_page(JavaThread *thread) { |
| uintptr_t page_offset = ((uintptr_t)thread >> |
| get_serialize_page_shift_count()) & |
| get_serialize_page_mask(); |
| *(volatile int32_t *)((uintptr_t)_mem_serialize_page+page_offset) = 1; |
| } |
| |
| static bool is_memory_serialize_page(JavaThread *thread, address addr) { |
| if (UseMembar) return false; |
| // Previously this function calculated the exact address of this |
| // thread's serialize page, and checked if the faulting address |
| // was equal. However, some platforms mask off faulting addresses |
| // to the page size, so now we just check that the address is |
| // within the page. This makes the thread argument unnecessary, |
| // but we retain the NULL check to preserve existing behavior. |
| if (thread == NULL) return false; |
| address page = (address) _mem_serialize_page; |
| return addr >= page && addr < (page + os::vm_page_size()); |
| } |
| |
| static void block_on_serialize_page_trap(); |
| |
| // threads |
| |
| enum ThreadType { |
| vm_thread, |
| cgc_thread, // Concurrent GC thread |
| pgc_thread, // Parallel GC thread |
| java_thread, |
| compiler_thread, |
| watcher_thread, |
| os_thread |
| }; |
| |
| static bool create_thread(Thread* thread, |
| ThreadType thr_type, |
| size_t stack_size = 0); |
| static bool create_main_thread(JavaThread* thread); |
| static bool create_attached_thread(JavaThread* thread); |
| static void pd_start_thread(Thread* thread); |
| static void start_thread(Thread* thread); |
| |
| static void initialize_thread(Thread* thr); |
| static void free_thread(OSThread* osthread); |
| |
| // thread id on Linux/64bit is 64bit, on Windows and Solaris, it's 32bit |
| static intx current_thread_id(); |
| static int current_process_id(); |
| static int sleep(Thread* thread, jlong ms, bool interruptable); |
| // Short standalone OS sleep suitable for slow path spin loop. |
| // Ignores Thread.interrupt() (so keep it short). |
| // ms = 0, will sleep for the least amount of time allowed by the OS. |
| static void naked_short_sleep(jlong ms); |
| static void infinite_sleep(); // never returns, use with CAUTION |
| static void naked_yield () ; |
| static OSReturn set_priority(Thread* thread, ThreadPriority priority); |
| static OSReturn get_priority(const Thread* const thread, ThreadPriority& priority); |
| |
| static void interrupt(Thread* thread); |
| static bool is_interrupted(Thread* thread, bool clear_interrupted); |
| |
| static int pd_self_suspend_thread(Thread* thread); |
| |
| static ExtendedPC fetch_frame_from_context(const void* ucVoid, intptr_t** sp, intptr_t** fp); |
| static frame fetch_frame_from_context(const void* ucVoid); |
| static frame fetch_frame_from_ucontext(Thread* thread, void* ucVoid); |
| |
| static ExtendedPC get_thread_pc(Thread *thread); |
| static void breakpoint(); |
| static bool start_debugging(char *buf, int buflen); |
| |
| static address current_stack_pointer(); |
| static address current_stack_base(); |
| static size_t current_stack_size(); |
| |
| static void verify_stack_alignment() PRODUCT_RETURN; |
| |
| static bool message_box(const char* title, const char* message); |
| static char* do_you_want_to_debug(const char* message); |
| |
| // run cmd in a separate process and return its exit code; or -1 on failures |
| static int fork_and_exec(char *cmd); |
| |
| // Call ::exit() on all platforms but Windows |
| static void exit(int num); |
| |
| // Terminate the VM, but don't exit the process |
| static void shutdown(); |
| |
| // Terminate with an error. Default is to generate a core file on platforms |
| // that support such things. This calls shutdown() and then aborts. |
| static void abort(bool dump_core, void *siginfo, const void *context); |
| static void abort(bool dump_core = true); |
| |
| // Die immediately, no exit hook, no abort hook, no cleanup. |
| static void die(); |
| |
| // File i/o operations |
| static const int default_file_open_flags(); |
| static int open(const char *path, int oflag, int mode); |
| static FILE* open(int fd, const char* mode); |
| static int close(int fd); |
| static jlong lseek(int fd, jlong offset, int whence); |
| static char* native_path(char *path); |
| static int ftruncate(int fd, jlong length); |
| static int fsync(int fd); |
| static int available(int fd, jlong *bytes); |
| |
| //File i/o operations |
| |
| static size_t read(int fd, void *buf, unsigned int nBytes); |
| static size_t read_at(int fd, void *buf, unsigned int nBytes, jlong offset); |
| static size_t restartable_read(int fd, void *buf, unsigned int nBytes); |
| static size_t write(int fd, const void *buf, unsigned int nBytes); |
| |
| // Reading directories. |
| static DIR* opendir(const char* dirname); |
| static int readdir_buf_size(const char *path); |
| static struct dirent* readdir(DIR* dirp, dirent* dbuf); |
| static int closedir(DIR* dirp); |
| |
| // Dynamic library extension |
| static const char* dll_file_extension(); |
| |
| static const char* get_temp_directory(); |
| static const char* get_current_directory(char *buf, size_t buflen); |
| |
| // Builds a platform-specific full library path given a ld path and lib name |
| // Returns true if buffer contains full path to existing file, false otherwise |
| static bool dll_build_name(char* buffer, size_t size, |
| const char* pathname, const char* fname); |
| |
| // Symbol lookup, find nearest function name; basically it implements |
| // dladdr() for all platforms. Name of the nearest function is copied |
| // to buf. Distance from its base address is optionally returned as offset. |
| // If function name is not found, buf[0] is set to '\0' and offset is |
| // set to -1 (if offset is non-NULL). |
| static bool dll_address_to_function_name(address addr, char* buf, |
| int buflen, int* offset, |
| bool demangle = true); |
| |
| // Locate DLL/DSO. On success, full path of the library is copied to |
| // buf, and offset is optionally set to be the distance between addr |
| // and the library's base address. On failure, buf[0] is set to '\0' |
| // and offset is set to -1 (if offset is non-NULL). |
| static bool dll_address_to_library_name(address addr, char* buf, |
| int buflen, int* offset); |
| |
| // Find out whether the pc is in the static code for jvm.dll/libjvm.so. |
| static bool address_is_in_vm(address addr); |
| |
| // Loads .dll/.so and |
| // in case of error it checks if .dll/.so was built for the |
| // same architecture as HotSpot is running on |
| static void* dll_load(const char *name, char *ebuf, int ebuflen); |
| |
| // lookup symbol in a shared library |
| static void* dll_lookup(void* handle, const char* name); |
| |
| // Unload library |
| static void dll_unload(void *lib); |
| |
| // Callback for loaded module information |
| // Input parameters: |
| // char* module_file_name, |
| // address module_base_addr, |
| // address module_top_addr, |
| // void* param |
| typedef int (*LoadedModulesCallbackFunc)(const char *, address, address, void *); |
| |
| static int get_loaded_modules_info(LoadedModulesCallbackFunc callback, void *param); |
| |
| // Return the handle of this process |
| static void* get_default_process_handle(); |
| |
| // Check for static linked agent library |
| static bool find_builtin_agent(AgentLibrary *agent_lib, const char *syms[], |
| size_t syms_len); |
| |
| // Find agent entry point |
| static void *find_agent_function(AgentLibrary *agent_lib, bool check_lib, |
| const char *syms[], size_t syms_len); |
| |
| // Write to stream |
| static int log_vsnprintf(char* buf, size_t len, const char* fmt, va_list args) ATTRIBUTE_PRINTF(3, 0); |
| |
| // Get host name in buffer provided |
| static bool get_host_name(char* buf, size_t buflen); |
| |
| // Print out system information; they are called by fatal error handler. |
| // Output format may be different on different platforms. |
| static void print_os_info(outputStream* st); |
| static void print_os_info_brief(outputStream* st); |
| static void print_cpu_info(outputStream* st, char* buf, size_t buflen); |
| static void pd_print_cpu_info(outputStream* st, char* buf, size_t buflen); |
| static void print_summary_info(outputStream* st, char* buf, size_t buflen); |
| static void print_memory_info(outputStream* st); |
| static void print_dll_info(outputStream* st); |
| static void print_environment_variables(outputStream* st, const char** env_list); |
| static void print_context(outputStream* st, const void* context); |
| static void print_register_info(outputStream* st, const void* context); |
| static void print_siginfo(outputStream* st, const void* siginfo); |
| static void print_signal_handlers(outputStream* st, char* buf, size_t buflen); |
| static void print_date_and_time(outputStream* st, char* buf, size_t buflen); |
| |
| static void print_location(outputStream* st, intptr_t x, bool verbose = false); |
| static size_t lasterror(char *buf, size_t len); |
| static int get_last_error(); |
| |
| // Determines whether the calling process is being debugged by a user-mode debugger. |
| static bool is_debugger_attached(); |
| |
| // wait for a key press if PauseAtExit is set |
| static void wait_for_keypress_at_exit(void); |
| |
| // The following two functions are used by fatal error handler to trace |
| // native (C) frames. They are not part of frame.hpp/frame.cpp because |
| // frame.hpp/cpp assume thread is JavaThread, and also because different |
| // OS/compiler may have different convention or provide different API to |
| // walk C frames. |
| // |
| // We don't attempt to become a debugger, so we only follow frames if that |
| // does not require a lookup in the unwind table, which is part of the binary |
| // file but may be unsafe to read after a fatal error. So on x86, we can |
| // only walk stack if %ebp is used as frame pointer; on ia64, it's not |
| // possible to walk C stack without having the unwind table. |
| static bool is_first_C_frame(frame *fr); |
| static frame get_sender_for_C_frame(frame *fr); |
| |
| // return current frame. pc() and sp() are set to NULL on failure. |
| static frame current_frame(); |
| |
| static void print_hex_dump(outputStream* st, address start, address end, int unitsize); |
| |
| // returns a string to describe the exception/signal; |
| // returns NULL if exception_code is not an OS exception/signal. |
| static const char* exception_name(int exception_code, char* buf, size_t buflen); |
| |
| // Returns the signal number (e.g. 11) for a given signal name (SIGSEGV). |
| static int get_signal_number(const char* signal_name); |
| |
| // Returns native Java library, loads if necessary |
| static void* native_java_library(); |
| |
| // Fills in path to jvm.dll/libjvm.so (used by the Disassembler) |
| static void jvm_path(char *buf, jint buflen); |
| |
| // Returns true if we are running in a headless jre. |
| static bool is_headless_jre(); |
| |
| // JNI names |
| static void print_jni_name_prefix_on(outputStream* st, int args_size); |
| static void print_jni_name_suffix_on(outputStream* st, int args_size); |
| |
| // Init os specific system properties values |
| static void init_system_properties_values(); |
| |
| // IO operations, non-JVM_ version. |
| static int stat(const char* path, struct stat* sbuf); |
| static bool dir_is_empty(const char* path); |
| |
| // IO operations on binary files |
| static int create_binary_file(const char* path, bool rewrite_existing); |
| static jlong current_file_offset(int fd); |
| static jlong seek_to_file_offset(int fd, jlong offset); |
| |
| // Retrieve native stack frames. |
| // Parameter: |
| // stack: an array to storage stack pointers. |
| // frames: size of above array. |
| // toSkip: number of stack frames to skip at the beginning. |
| // Return: number of stack frames captured. |
| static int get_native_stack(address* stack, int size, int toSkip = 0); |
| |
| // General allocation (must be MT-safe) |
| static void* malloc (size_t size, MEMFLAGS flags, const NativeCallStack& stack); |
| static void* malloc (size_t size, MEMFLAGS flags); |
| static void* realloc (void *memblock, size_t size, MEMFLAGS flag, const NativeCallStack& stack); |
| static void* realloc (void *memblock, size_t size, MEMFLAGS flag); |
| |
| static void free (void *memblock); |
| static bool check_heap(bool force = false); // verify C heap integrity |
| static char* strdup(const char *, MEMFLAGS flags = mtInternal); // Like strdup |
| // Like strdup, but exit VM when strdup() returns NULL |
| static char* strdup_check_oom(const char*, MEMFLAGS flags = mtInternal); |
| |
| #ifndef PRODUCT |
| static julong num_mallocs; // # of calls to malloc/realloc |
| static julong alloc_bytes; // # of bytes allocated |
| static julong num_frees; // # of calls to free |
| static julong free_bytes; // # of bytes freed |
| #endif |
| |
| // SocketInterface (ex HPI SocketInterface ) |
| static int socket(int domain, int type, int protocol); |
| static int socket_close(int fd); |
| static int recv(int fd, char* buf, size_t nBytes, uint flags); |
| static int send(int fd, char* buf, size_t nBytes, uint flags); |
| static int raw_send(int fd, char* buf, size_t nBytes, uint flags); |
| static int connect(int fd, struct sockaddr* him, socklen_t len); |
| static struct hostent* get_host_by_name(char* name); |
| |
| // Support for signals (see JVM_RaiseSignal, JVM_RegisterSignal) |
| static void signal_init(); |
| static void signal_init_pd(); |
| static void signal_notify(int signal_number); |
| static void* signal(int signal_number, void* handler); |
| static void signal_raise(int signal_number); |
| static int signal_wait(); |
| static int signal_lookup(); |
| static void* user_handler(); |
| static void terminate_signal_thread(); |
| static int sigexitnum_pd(); |
| |
| // random number generation |
| static long random(); // return 32bit pseudorandom number |
| static void init_random(long initval); // initialize random sequence |
| |
| // Structured OS Exception support |
| static void os_exception_wrapper(java_call_t f, JavaValue* value, const methodHandle& method, JavaCallArguments* args, Thread* thread); |
| |
| // On Posix compatible OS it will simply check core dump limits while on Windows |
| // it will check if dump file can be created. Check or prepare a core dump to be |
| // taken at a later point in the same thread in os::abort(). Use the caller |
| // provided buffer as a scratch buffer. The status message which will be written |
| // into the error log either is file location or a short error message, depending |
| // on the checking result. |
| static void check_dump_limit(char* buffer, size_t bufferSize); |
| |
| // Get the default path to the core file |
| // Returns the length of the string |
| static int get_core_path(char* buffer, size_t bufferSize); |
| |
| // JVMTI & JVM monitoring and management support |
| // The thread_cpu_time() and current_thread_cpu_time() are only |
| // supported if is_thread_cpu_time_supported() returns true. |
| // They are not supported on Solaris T1. |
| |
| // Thread CPU Time - return the fast estimate on a platform |
| // On Solaris - call gethrvtime (fast) - user time only |
| // On Linux - fast clock_gettime where available - user+sys |
| // - otherwise: very slow /proc fs - user+sys |
| // On Windows - GetThreadTimes - user+sys |
| static jlong current_thread_cpu_time(); |
| static jlong thread_cpu_time(Thread* t); |
| |
| // Thread CPU Time with user_sys_cpu_time parameter. |
| // |
| // If user_sys_cpu_time is true, user+sys time is returned. |
| // Otherwise, only user time is returned |
| static jlong current_thread_cpu_time(bool user_sys_cpu_time); |
| static jlong thread_cpu_time(Thread* t, bool user_sys_cpu_time); |
| |
| // Return a bunch of info about the timers. |
| // Note that the returned info for these two functions may be different |
| // on some platforms |
| static void current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr); |
| static void thread_cpu_time_info(jvmtiTimerInfo *info_ptr); |
| |
| static bool is_thread_cpu_time_supported(); |
| |
| // System loadavg support. Returns -1 if load average cannot be obtained. |
| static int loadavg(double loadavg[], int nelem); |
| |
| // Hook for os specific jvm options that we don't want to abort on seeing |
| static bool obsolete_option(const JavaVMOption *option); |
| |
| // Amount beyond the callee frame size that we bang the stack. |
| static int extra_bang_size_in_bytes(); |
| |
| static char** split_path(const char* path, int* n); |
| |
| // Extensions |
| #include "runtime/os_ext.hpp" |
| |
| public: |
| class CrashProtectionCallback : public StackObj { |
| public: |
| virtual void call() = 0; |
| }; |
| |
| // Platform dependent stuff |
| #ifdef TARGET_OS_FAMILY_linux |
| # include "os_linux.hpp" |
| # include "os_posix.hpp" |
| #endif |
| #ifdef TARGET_OS_FAMILY_solaris |
| # include "os_solaris.hpp" |
| # include "os_posix.hpp" |
| #endif |
| #ifdef TARGET_OS_FAMILY_windows |
| # include "os_windows.hpp" |
| #endif |
| #ifdef TARGET_OS_FAMILY_aix |
| # include "os_aix.hpp" |
| # include "os_posix.hpp" |
| #endif |
| #ifdef TARGET_OS_FAMILY_bsd |
| # include "os_posix.hpp" |
| # include "os_bsd.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_linux_x86 |
| # include "os_linux_x86.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_linux_sparc |
| # include "os_linux_sparc.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_linux_zero |
| # include "os_linux_zero.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_solaris_x86 |
| # include "os_solaris_x86.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_solaris_sparc |
| # include "os_solaris_sparc.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_windows_x86 |
| # include "os_windows_x86.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_linux_arm |
| # include "os_linux_arm.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_linux_ppc |
| # include "os_linux_ppc.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_aix_ppc |
| # include "os_aix_ppc.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_linux_aarch64 |
| # include "os_linux_aarch64.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_bsd_x86 |
| # include "os_bsd_x86.hpp" |
| #endif |
| #ifdef TARGET_OS_ARCH_bsd_zero |
| # include "os_bsd_zero.hpp" |
| #endif |
| |
| #ifndef OS_NATIVE_THREAD_CREATION_FAILED_MSG |
| #define OS_NATIVE_THREAD_CREATION_FAILED_MSG "unable to create native thread: possibly out of memory or process/resource limits reached" |
| #endif |
| |
| public: |
| #ifndef PLATFORM_PRINT_NATIVE_STACK |
| // No platform-specific code for printing the native stack. |
| static bool platform_print_native_stack(outputStream* st, const void* context, |
| char *buf, int buf_size) { |
| return false; |
| } |
| #endif |
| |
| // debugging support (mostly used by debug.cpp but also fatal error handler) |
| static bool find(address pc, outputStream* st = tty); // OS specific function to make sense out of an address |
| |
| static bool dont_yield(); // when true, JVM_Yield() is nop |
| static void print_statistics(); |
| |
| // Thread priority helpers (implemented in OS-specific part) |
| static OSReturn set_native_priority(Thread* thread, int native_prio); |
| static OSReturn get_native_priority(const Thread* const thread, int* priority_ptr); |
| static int java_to_os_priority[CriticalPriority + 1]; |
| // Hint to the underlying OS that a task switch would not be good. |
| // Void return because it's a hint and can fail. |
| static void hint_no_preempt(); |
| static const char* native_thread_creation_failed_msg() { |
| return OS_NATIVE_THREAD_CREATION_FAILED_MSG; |
| } |
| |
| // Used at creation if requested by the diagnostic flag PauseAtStartup. |
| // Causes the VM to wait until an external stimulus has been applied |
| // (for Unix, that stimulus is a signal, for Windows, an external |
| // ResumeThread call) |
| static void pause(); |
| |
| // Builds a platform dependent Agent_OnLoad_<libname> function name |
| // which is used to find statically linked in agents. |
| static char* build_agent_function_name(const char *sym, const char *cname, |
| bool is_absolute_path); |
| |
| class SuspendedThreadTaskContext { |
| public: |
| SuspendedThreadTaskContext(Thread* thread, void *ucontext) : _thread(thread), _ucontext(ucontext) {} |
| Thread* thread() const { return _thread; } |
| void* ucontext() const { return _ucontext; } |
| private: |
| Thread* _thread; |
| void* _ucontext; |
| }; |
| |
| class SuspendedThreadTask { |
| public: |
| SuspendedThreadTask(Thread* thread) : _thread(thread), _done(false) {} |
| virtual ~SuspendedThreadTask() {} |
| void run(); |
| bool is_done() { return _done; } |
| virtual void do_task(const SuspendedThreadTaskContext& context) = 0; |
| protected: |
| private: |
| void internal_do_task(); |
| Thread* _thread; |
| bool _done; |
| }; |
| |
| #ifndef TARGET_OS_FAMILY_windows |
| // Suspend/resume support |
| // Protocol: |
| // |
| // a thread starts in SR_RUNNING |
| // |
| // SR_RUNNING can go to |
| // * SR_SUSPEND_REQUEST when the WatcherThread wants to suspend it |
| // SR_SUSPEND_REQUEST can go to |
| // * SR_RUNNING if WatcherThread decides it waited for SR_SUSPENDED too long (timeout) |
| // * SR_SUSPENDED if the stopped thread receives the signal and switches state |
| // SR_SUSPENDED can go to |
| // * SR_WAKEUP_REQUEST when the WatcherThread has done the work and wants to resume |
| // SR_WAKEUP_REQUEST can go to |
| // * SR_RUNNING when the stopped thread receives the signal |
| // * SR_WAKEUP_REQUEST on timeout (resend the signal and try again) |
| class SuspendResume { |
| public: |
| enum State { |
| SR_RUNNING, |
| SR_SUSPEND_REQUEST, |
| SR_SUSPENDED, |
| SR_WAKEUP_REQUEST |
| }; |
| |
| private: |
| volatile State _state; |
| |
| private: |
| /* try to switch state from state "from" to state "to" |
| * returns the state set after the method is complete |
| */ |
| State switch_state(State from, State to); |
| |
| public: |
| SuspendResume() : _state(SR_RUNNING) { } |
| |
| State state() const { return _state; } |
| |
| State request_suspend() { |
| return switch_state(SR_RUNNING, SR_SUSPEND_REQUEST); |
| } |
| |
| State cancel_suspend() { |
| return switch_state(SR_SUSPEND_REQUEST, SR_RUNNING); |
| } |
| |
| State suspended() { |
| return switch_state(SR_SUSPEND_REQUEST, SR_SUSPENDED); |
| } |
| |
| State request_wakeup() { |
| return switch_state(SR_SUSPENDED, SR_WAKEUP_REQUEST); |
| } |
| |
| State running() { |
| return switch_state(SR_WAKEUP_REQUEST, SR_RUNNING); |
| } |
| |
| bool is_running() const { |
| return _state == SR_RUNNING; |
| } |
| |
| bool is_suspend_request() const { |
| return _state == SR_SUSPEND_REQUEST; |
| } |
| |
| bool is_suspended() const { |
| return _state == SR_SUSPENDED; |
| } |
| }; |
| #endif |
| |
| |
| protected: |
| static long _rand_seed; // seed for random number generator |
| static int _processor_count; // number of processors |
| |
| static char* format_boot_path(const char* format_string, |
| const char* home, |
| int home_len, |
| char fileSep, |
| char pathSep); |
| static bool set_boot_path(char fileSep, char pathSep); |
| |
| }; |
| |
| // Note that "PAUSE" is almost always used with synchronization |
| // so arguably we should provide Atomic::SpinPause() instead |
| // of the global SpinPause() with C linkage. |
| // It'd also be eligible for inlining on many platforms. |
| |
| extern "C" int SpinPause(); |
| |
| #endif // SHARE_VM_RUNTIME_OS_HPP |