0N/A

1879N/A#ifndef SHARE_VM_RUNTIME_OS_HPP

1879N/A#define SHARE_VM_RUNTIME_OS_HPP

1879N/A

1879N/A#include "jvmtifiles/jvmti.h"

1879N/A#include "runtime/atomic.hpp"

1879N/A#include "runtime/extendedPC.hpp"

1879N/A#include "runtime/handles.hpp"

1879N/A#include "utilities/top.hpp"

1879N/A#ifdef TARGET_OS_FAMILY_linux

1879N/A# include "jvm_linux.h"

1879N/A#endif

1879N/A#ifdef TARGET_OS_FAMILY_solaris

1879N/A# include "jvm_solaris.h"

1879N/A#endif

1879N/A#ifdef TARGET_OS_FAMILY_windows

1879N/A# include "jvm_windows.h"

1879N/A#endif

2796N/A#ifdef TARGET_OS_FAMILY_bsd

2796N/A# include "jvm_bsd.h"

2796N/A#endif

1879N/A

0N/A

0N/Atypedef void (*dll_func)(...);

0N/A

0N/Aclass Thread;

0N/Aclass JavaThread;

0N/Aclass Event;

0N/Aclass DLL;

0N/Aclass FileHandle;

141N/Atemplate<class E> class GrowableArray;

0N/A

0N/A

0N/Aenum OSReturn {

0N/A OS_OK = 0, // Operation was successful

0N/A OS_ERR = -1, // Operation failed

0N/A OS_INTRPT = -2, // Operation was interrupted

0N/A OS_TIMEOUT = -3, // Operation timed out

0N/A OS_NOMEM = -5, // Operation failed for lack of memory

0N/A OS_NORESOURCE = -6 // Operation failed for lack of nonmemory resource

0N/A};

0N/A

0N/Aenum ThreadPriority { // JLS 20.20.1-3

0N/A NoPriority = -1, // Initial non-priority value

0N/A MinPriority = 1, // Minimum priority

0N/A NormPriority = 5, // Normal (non-daemon) priority

0N/A NearMaxPriority = 9, // High priority, used for VMThread

3137N/A MaxPriority = 10, // Highest priority, used for WatcherThread

0N/A // ensures that VMThread doesn't starve profiler

3137N/A CriticalPriority = 11 // Critical thread priority

0N/A};

0N/A

4552N/Aconst bool ExecMem = true;

4552N/A

0N/Atypedef void (*java_call_t)(JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread);

0N/A

0N/Aclass os: AllStatic {

1123N/A public:

0N/A enum { page_sizes_max = 9 }; // Size of _page_sizes array (8 plus a sentinel)

0N/A

1123N/A private:

0N/A static OSThread* _starting_thread;

0N/A static address _polling_page;

0N/A static volatile int32_t * _mem_serialize_page;

0N/A static uintptr_t _serialize_page_mask;

1123N/A public:

0N/A static size_t _page_sizes[page_sizes_max];

0N/A

1123N/A private:

0N/A static void init_page_sizes(size_t default_page_size) {

0N/A _page_sizes[0] = default_page_size;

0N/A _page_sizes[1] = 0; // sentinel

0N/A }

0N/A

3863N/A static char* pd_reserve_memory(size_t bytes, char* addr = 0,

3863N/A size_t alignment_hint = 0);

3863N/A static char* pd_attempt_reserve_memory_at(size_t bytes, char* addr);

3863N/A static void pd_split_reserved_memory(char *base, size_t size,

3863N/A size_t split, bool realloc);

4552N/A static bool pd_commit_memory(char* addr, size_t bytes, bool executable);

3863N/A static bool pd_commit_memory(char* addr, size_t size, size_t alignment_hint,

4552N/A bool executable);

4552N/A // Same as pd_commit_memory() that either succeeds or calls

4552N/A // vm_exit_out_of_memory() with the specified mesg.

4552N/A static void pd_commit_memory_or_exit(char* addr, size_t bytes,

4552N/A bool executable, const char* mesg);

4552N/A static void pd_commit_memory_or_exit(char* addr, size_t size,

4552N/A size_t alignment_hint,

4552N/A bool executable, const char* mesg);

3863N/A static bool pd_uncommit_memory(char* addr, size_t bytes);

3863N/A static bool pd_release_memory(char* addr, size_t bytes);

3863N/A

3863N/A static char* pd_map_memory(int fd, const char* file_name, size_t file_offset,

3863N/A char *addr, size_t bytes, bool read_only = false,

3863N/A bool allow_exec = false);

3863N/A static char* pd_remap_memory(int fd, const char* file_name, size_t file_offset,

3863N/A char *addr, size_t bytes, bool read_only,

3863N/A bool allow_exec);

3863N/A static bool pd_unmap_memory(char *addr, size_t bytes);

3863N/A static void pd_free_memory(char *addr, size_t bytes, size_t alignment_hint);

3863N/A static void pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint);

3863N/A

3863N/A

0N/A public:

1601N/A static void init(void); // Called before command line parsing

1601N/A static jint init_2(void); // Called after command line parsing

3029N/A static void init_globals(void) { // Called from init_globals() in init.cpp

3029N/A init_globals_ext();

3029N/A }

1601N/A static void init_3(void); // Called at the end of vm init

0N/A

0N/A // File names are case-insensitive on windows only

0N/A // Override me as needed

0N/A static int file_name_strcmp(const char* s1, const char* s2);

0N/A

0N/A static bool getenv(const char* name, char* buffer, int len);

0N/A static bool have_special_privileges();

0N/A

0N/A static jlong javaTimeMillis();

0N/A static jlong javaTimeNanos();

0N/A static void javaTimeNanos_info(jvmtiTimerInfo *info_ptr);

0N/A static void run_periodic_checks();

0N/A

0N/A

0N/A // Returns the elapsed time in seconds since the vm started.

0N/A static double elapsedTime();

0N/A

0N/A // Returns real time in seconds since an arbitrary point

0N/A // in the past.

0N/A static bool getTimesSecs(double* process_real_time,

0N/A double* process_user_time,

0N/A double* process_system_time);

0N/A

0N/A // Interface to the performance counter

0N/A static jlong elapsed_counter();

0N/A static jlong elapsed_frequency();

0N/A

342N/A // The "virtual time" of a thread is the amount of time a thread has

342N/A // actually run. The first function indicates whether the OS supports

342N/A // this functionality for the current thread, and if so:

342N/A // * the second enables vtime tracking (if that is required).

342N/A // * the third tells whether vtime is enabled.

342N/A // * the fourth returns the elapsed virtual time for the current

342N/A // thread.

342N/A static bool supports_vtime();

342N/A static bool enable_vtime();

342N/A static bool vtime_enabled();

342N/A static double elapsedVTime();

342N/A

0N/A // Return current local time in a string (YYYY-MM-DD HH:MM:SS).

0N/A // It is MT safe, but not async-safe, as reading time zone

0N/A // information may require a lock on some platforms.

548N/A static char* local_time_string(char *buf, size_t buflen);

548N/A static struct tm* localtime_pd (const time_t* clock, struct tm* res);

0N/A // Fill in buffer with current local time as an ISO-8601 string.

0N/A // E.g., YYYY-MM-DDThh:mm:ss.mmm+zzzz.

0N/A // Returns buffer, or NULL if it failed.

0N/A static char* iso8601_time(char* buffer, size_t buffer_length);

0N/A

0N/A // Interface for detecting multiprocessor system

0N/A static inline bool is_MP() {

0N/A assert(_processor_count > 0, "invalid processor count");

0N/A return _processor_count > 1;

0N/A }

0N/A static julong available_memory();

0N/A static julong physical_memory();

0N/A static julong allocatable_physical_memory(julong size);

0N/A static bool is_server_class_machine();

0N/A

0N/A // number of CPUs

0N/A static int processor_count() {

0N/A return _processor_count;

0N/A }

1123N/A static void set_processor_count(int count) { _processor_count = count; }

0N/A

0N/A // Returns the number of CPUs this process is currently allowed to run on.

0N/A // Note that on some OSes this can change dynamically.

0N/A static int active_processor_count();

0N/A

0N/A // Bind processes to processors.

0N/A // This is a two step procedure:

0N/A // first you generate a distribution of processes to processors,

0N/A // then you bind processes according to that distribution.

0N/A // Compute a distribution for number of processes to processors.

0N/A // Stores the processor id's into the distribution array argument.

0N/A // Returns true if it worked, false if it didn't.

0N/A static bool distribute_processes(uint length, uint* distribution);

0N/A // Binds the current process to a processor.

0N/A // Returns true if it worked, false if it didn't.

0N/A static bool bind_to_processor(uint processor_id);

0N/A

2842N/A // Give a name to the current thread.

2842N/A static void set_native_thread_name(const char *name);

2842N/A

0N/A // Interface for stack banging (predetect possible stack overflow for

0N/A // exception processing) There are guard pages, and above that shadow

0N/A // pages for stack overflow checking.

0N/A static bool uses_stack_guard_pages();

0N/A static bool allocate_stack_guard_pages();

0N/A static void bang_stack_shadow_pages();

0N/A static bool stack_shadow_pages_available(Thread *thread, methodHandle method);

0N/A

0N/A // OS interface to Virtual Memory

0N/A

0N/A // Return the default page size.

0N/A static int vm_page_size();

0N/A

0N/A // Return the page size to use for a region of memory. The min_pages argument

0N/A // is a hint intended to limit fragmentation; it says the returned page size

0N/A // should be <= region_max_size / min_pages. Because min_pages is a hint,

0N/A // this routine may return a size larger than region_max_size / min_pages.

0N/A //

0N/A // The current implementation ignores min_pages if a larger page size is an

0N/A // exact multiple of both region_min_size and region_max_size. This allows

0N/A // larger pages to be used when doing so would not cause fragmentation; in

0N/A // particular, a single page can be used when region_min_size ==

0N/A // region_max_size == a supported page size.

0N/A static size_t page_size_for_region(size_t region_min_size,

0N/A size_t region_max_size,

0N/A uint min_pages);

0N/A

2684N/A // Methods for tracing page sizes returned by the above method; enabled by

0N/A // TracePageSizes. The region_{min,max}_size parameters should be the values

0N/A // passed to page_size_for_region() and page_size should be the result of that

0N/A // call. The (optional) base and size parameters should come from the

0N/A // ReservedSpace base() and size() methods.

2684N/A static void trace_page_sizes(const char* str, const size_t* page_sizes,

2684N/A int count) PRODUCT_RETURN;

0N/A static void trace_page_sizes(const char* str, const size_t region_min_size,

0N/A const size_t region_max_size,

0N/A const size_t page_size,

0N/A const char* base = NULL,

0N/A const size_t size = 0) PRODUCT_RETURN;

0N/A

0N/A static int vm_allocation_granularity();

0N/A static char* reserve_memory(size_t bytes, char* addr = 0,

0N/A size_t alignment_hint = 0);

4499N/A static char* reserve_memory(size_t bytes, char* addr,

4499N/A size_t alignment_hint, MEMFLAGS flags);

4373N/A static char* reserve_memory_aligned(size_t size, size_t alignment);

0N/A static char* attempt_reserve_memory_at(size_t bytes, char* addr);

0N/A static void split_reserved_memory(char *base, size_t size,

0N/A size_t split, bool realloc);

4552N/A static bool commit_memory(char* addr, size_t bytes, bool executable);

656N/A static bool commit_memory(char* addr, size_t size, size_t alignment_hint,

4552N/A bool executable);

4552N/A // Same as commit_memory() that either succeeds or calls

4552N/A // vm_exit_out_of_memory() with the specified mesg.

4552N/A static void commit_memory_or_exit(char* addr, size_t bytes,

4552N/A bool executable, const char* mesg);

4552N/A static void commit_memory_or_exit(char* addr, size_t size,

4552N/A size_t alignment_hint,

4552N/A bool executable, const char* mesg);

0N/A static bool uncommit_memory(char* addr, size_t bytes);

0N/A static bool release_memory(char* addr, size_t bytes);

4525N/A static bool can_release_partial_region();

4525N/A static bool release_or_uncommit_partial_region(char* addr, size_t bytes);

237N/A

237N/A enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX };

237N/A static bool protect_memory(char* addr, size_t bytes, ProtType prot,

477N/A bool is_committed = true);

237N/A

0N/A static bool guard_memory(char* addr, size_t bytes);

0N/A static bool unguard_memory(char* addr, size_t bytes);

1320N/A static bool create_stack_guard_pages(char* addr, size_t bytes);

3863N/A static bool pd_create_stack_guard_pages(char* addr, size_t bytes);

1320N/A static bool remove_stack_guard_pages(char* addr, size_t bytes);

1320N/A

0N/A static char* map_memory(int fd, const char* file_name, size_t file_offset,

0N/A char *addr, size_t bytes, bool read_only = false,

0N/A bool allow_exec = false);

0N/A static char* remap_memory(int fd, const char* file_name, size_t file_offset,

0N/A char *addr, size_t bytes, bool read_only,

0N/A bool allow_exec);

0N/A static bool unmap_memory(char *addr, size_t bytes);

3014N/A static void free_memory(char *addr, size_t bytes, size_t alignment_hint);

0N/A static void realign_memory(char *addr, size_t bytes, size_t alignment_hint);

0N/A

0N/A // NUMA-specific interface

141N/A static bool numa_has_static_binding();

141N/A static bool numa_has_group_homing();

141N/A static void numa_make_local(char *addr, size_t bytes, int lgrp_hint);

0N/A static void numa_make_global(char *addr, size_t bytes);

0N/A static size_t numa_get_groups_num();

0N/A static size_t numa_get_leaf_groups(int *ids, size_t size);

0N/A static bool numa_topology_changed();

0N/A static int numa_get_group_id();

0N/A

0N/A // Page manipulation

0N/A struct page_info {

0N/A size_t size;

0N/A int lgrp_id;

0N/A };

0N/A static bool get_page_info(char *start, page_info* info);

0N/A static char* scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found);

0N/A

0N/A static char* non_memory_address_word();

0N/A // reserve, commit and pin the entire memory region

656N/A static char* reserve_memory_special(size_t size, char* addr = NULL,

656N/A bool executable = false);

0N/A static bool release_memory_special(char* addr, size_t bytes);

2415N/A static void large_page_init();

0N/A static size_t large_page_size();

0N/A static bool can_commit_large_page_memory();

79N/A static bool can_execute_large_page_memory();

0N/A

0N/A // OS interface to polling page

0N/A static address get_polling_page() { return _polling_page; }

0N/A static void set_polling_page(address page) { _polling_page = page; }

0N/A static bool is_poll_address(address addr) { return addr >= _polling_page && addr < (_polling_page + os::vm_page_size()); }

0N/A static void make_polling_page_unreadable();

0N/A static void make_polling_page_readable();

0N/A

0N/A // Routines used to serialize the thread state without using membars

0N/A static void serialize_thread_states();

0N/A

0N/A // Since we write to the serialize page from every thread, we

0N/A // want stores to be on unique cache lines whenever possible

0N/A // in order to minimize CPU cross talk. We pre-compute the

0N/A // amount to shift the thread* to make this offset unique to

0N/A // each thread.

0N/A static int get_serialize_page_shift_count() {

0N/A return SerializePageShiftCount;

0N/A }

0N/A

0N/A static void set_serialize_page_mask(uintptr_t mask) {

0N/A _serialize_page_mask = mask;

0N/A }

0N/A

0N/A static unsigned int get_serialize_page_mask() {

0N/A return _serialize_page_mask;

0N/A }

0N/A

0N/A static void set_memory_serialize_page(address page);

0N/A

0N/A static address get_memory_serialize_page() {

0N/A return (address)_mem_serialize_page;

0N/A }

0N/A

0N/A static inline void write_memory_serialize_page(JavaThread *thread) {

0N/A uintptr_t page_offset = ((uintptr_t)thread >>

0N/A get_serialize_page_shift_count()) &

0N/A get_serialize_page_mask();

0N/A *(volatile int32_t *)((uintptr_t)_mem_serialize_page+page_offset) = 1;

0N/A }

0N/A

0N/A static bool is_memory_serialize_page(JavaThread *thread, address addr) {

0N/A if (UseMembar) return false;

1078N/A // Previously this function calculated the exact address of this

1078N/A // thread's serialize page, and checked if the faulting address

1078N/A // was equal. However, some platforms mask off faulting addresses

1078N/A // to the page size, so now we just check that the address is

1078N/A // within the page. This makes the thread argument unnecessary,

1078N/A // but we retain the NULL check to preserve existing behaviour.

0N/A if (thread == NULL) return false;

1078N/A address page = (address) _mem_serialize_page;

1078N/A return addr >= page && addr < (page + os::vm_page_size());

0N/A }

0N/A

0N/A static void block_on_serialize_page_trap();

0N/A

0N/A // threads

0N/A

0N/A enum ThreadType {

0N/A vm_thread,

0N/A cgc_thread, // Concurrent GC thread

0N/A pgc_thread, // Parallel GC thread

0N/A java_thread,

0N/A compiler_thread,

1601N/A watcher_thread,

1601N/A os_thread

0N/A };

0N/A

0N/A static bool create_thread(Thread* thread,

0N/A ThreadType thr_type,

0N/A size_t stack_size = 0);

0N/A static bool create_main_thread(JavaThread* thread);

0N/A static bool create_attached_thread(JavaThread* thread);

0N/A static void pd_start_thread(Thread* thread);

0N/A static void start_thread(Thread* thread);

0N/A

4060N/A static void initialize_thread(Thread* thr);

0N/A static void free_thread(OSThread* osthread);

0N/A

0N/A // thread id on Linux/64bit is 64bit, on Windows and Solaris, it's 32bit

0N/A static intx current_thread_id();

0N/A static int current_process_id();

0N/A static int sleep(Thread* thread, jlong ms, bool interruptable);

0N/A static int naked_sleep();

0N/A static void infinite_sleep(); // never returns, use with CAUTION

0N/A static void yield(); // Yields to all threads with same priority

0N/A enum YieldResult {

0N/A YIELD_SWITCHED = 1, // caller descheduled, other ready threads exist & ran

0N/A YIELD_NONEREADY = 0, // No other runnable/ready threads.

0N/A // platform-specific yield return immediately

0N/A YIELD_UNKNOWN = -1 // Unknown: platform doesn't support _SWITCHED or _NONEREADY

0N/A // YIELD_SWITCHED and YIELD_NONREADY imply the platform supports a "strong"

0N/A // yield that can be used in lieu of blocking.

0N/A } ;

0N/A static YieldResult NakedYield () ;

0N/A static void yield_all(int attempts = 0); // Yields to all other threads including lower priority

0N/A static void loop_breaker(int attempts); // called from within tight loops to possibly influence time-sharing

0N/A static OSReturn set_priority(Thread* thread, ThreadPriority priority);

0N/A static OSReturn get_priority(const Thread* const thread, ThreadPriority& priority);

0N/A

0N/A static void interrupt(Thread* thread);

0N/A static bool is_interrupted(Thread* thread, bool clear_interrupted);

0N/A

0N/A static int pd_self_suspend_thread(Thread* thread);

0N/A

0N/A static ExtendedPC fetch_frame_from_context(void* ucVoid, intptr_t** sp, intptr_t** fp);

0N/A static frame fetch_frame_from_context(void* ucVoid);

0N/A

0N/A static ExtendedPC get_thread_pc(Thread *thread);

0N/A static void breakpoint();

0N/A

0N/A static address current_stack_pointer();

0N/A static address current_stack_base();

0N/A static size_t current_stack_size();

0N/A

3574N/A static void verify_stack_alignment() PRODUCT_RETURN;

3574N/A

0N/A static int message_box(const char* title, const char* message);

0N/A static char* do_you_want_to_debug(const char* message);

0N/A

0N/A // run cmd in a separate process and return its exit code; or -1 on failures

0N/A static int fork_and_exec(char *cmd);

0N/A

0N/A // Set file to send error reports.

0N/A static void set_error_file(const char *logfile);

0N/A

0N/A // os::exit() is merged with vm_exit()

0N/A // static void exit(int num);

0N/A

0N/A // Terminate the VM, but don't exit the process

0N/A static void shutdown();

0N/A

0N/A // Terminate with an error. Default is to generate a core file on platforms

0N/A // that support such things. This calls shutdown() and then aborts.

0N/A static void abort(bool dump_core = true);

0N/A

0N/A // Die immediately, no exit hook, no abort hook, no cleanup.

0N/A static void die();

0N/A

1887N/A // File i/o operations

1887N/A static const int default_file_open_flags();

1887N/A static int open(const char *path, int oflag, int mode);

1887N/A static int close(int fd);

1887N/A static jlong lseek(int fd, jlong offset, int whence);

1887N/A static char* native_path(char *path);

1887N/A static int ftruncate(int fd, jlong length);

1887N/A static int fsync(int fd);

1887N/A static int available(int fd, jlong *bytes);

1887N/A

1887N/A //File i/o operations

1887N/A

1887N/A static size_t read(int fd, void *buf, unsigned int nBytes);

1887N/A static size_t restartable_read(int fd, void *buf, unsigned int nBytes);

1887N/A static size_t write(int fd, const void *buf, unsigned int nBytes);

1887N/A

0N/A // Reading directories.

0N/A static DIR* opendir(const char* dirname);

0N/A static int readdir_buf_size(const char *path);

0N/A static struct dirent* readdir(DIR* dirp, dirent* dbuf);

0N/A static int closedir(DIR* dirp);

0N/A

0N/A // Dynamic library extension

0N/A static const char* dll_file_extension();

0N/A

0N/A static const char* get_temp_directory();

0N/A static const char* get_current_directory(char *buf, int buflen);

0N/A

242N/A // Builds a platform-specific full library path given a ld path and lib name

242N/A static void dll_build_name(char* buffer, size_t size,

242N/A const char* pathname, const char* fname);

242N/A

0N/A // Symbol lookup, find nearest function name; basically it implements

0N/A // dladdr() for all platforms. Name of the nearest function is copied

0N/A // to buf. Distance from its base address is returned as offset.

0N/A // If function name is not found, buf[0] is set to '\0' and offset is

0N/A // set to -1.

0N/A static bool dll_address_to_function_name(address addr, char* buf,

0N/A int buflen, int* offset);

0N/A

0N/A // Locate DLL/DSO. On success, full path of the library is copied to

0N/A // buf, and offset is set to be the distance between addr and the

0N/A // library's base address. On failure, buf[0] is set to '\0' and

0N/A // offset is set to -1.

0N/A static bool dll_address_to_library_name(address addr, char* buf,

0N/A int buflen, int* offset);

0N/A

0N/A // Find out whether the pc is in the static code for jvm.dll/libjvm.so.

0N/A static bool address_is_in_vm(address addr);

0N/A

0N/A // Loads .dll/.so and

0N/A // in case of error it checks if .dll/.so was built for the

0N/A // same architecture as Hotspot is running on

0N/A static void* dll_load(const char *name, char *ebuf, int ebuflen);

0N/A

242N/A // lookup symbol in a shared library

242N/A static void* dll_lookup(void* handle, const char* name);

242N/A

1887N/A // Unload library

1887N/A static void dll_unload(void *lib);

1887N/A

0N/A // Print out system information; they are called by fatal error handler.

0N/A // Output format may be different on different platforms.

0N/A static void print_os_info(outputStream* st);

3380N/A static void print_os_info_brief(outputStream* st);

0N/A static void print_cpu_info(outputStream* st);

2625N/A static void pd_print_cpu_info(outputStream* st);

0N/A static void print_memory_info(outputStream* st);

0N/A static void print_dll_info(outputStream* st);

0N/A static void print_environment_variables(outputStream* st, const char** env_list, char* buffer, int len);

0N/A static void print_context(outputStream* st, void* context);

1827N/A static void print_register_info(outputStream* st, void* context);

0N/A static void print_siginfo(outputStream* st, void* siginfo);

0N/A static void print_signal_handlers(outputStream* st, char* buf, size_t buflen);

0N/A static void print_date_and_time(outputStream* st);

0N/A

1827N/A static void print_location(outputStream* st, intptr_t x, bool verbose = false);

1887N/A static size_t lasterror(char *buf, size_t len);

3030N/A static int get_last_error();

1601N/A

2149N/A // Determines whether the calling process is being debugged by a user-mode debugger.

2149N/A static bool is_debugger_attached();

2149N/A

2149N/A // wait for a key press if PauseAtExit is set

2149N/A static void wait_for_keypress_at_exit(void);

2149N/A

0N/A // The following two functions are used by fatal error handler to trace

0N/A // native (C) frames. They are not part of frame.hpp/frame.cpp because

0N/A // frame.hpp/cpp assume thread is JavaThread, and also because different

0N/A // OS/compiler may have different convention or provide different API to

0N/A // walk C frames.

0N/A //

0N/A // We don't attempt to become a debugger, so we only follow frames if that

0N/A // does not require a lookup in the unwind table, which is part of the binary

0N/A // file but may be unsafe to read after a fatal error. So on x86, we can

0N/A // only walk stack if %ebp is used as frame pointer; on ia64, it's not

0N/A // possible to walk C stack without having the unwind table.

0N/A static bool is_first_C_frame(frame *fr);

0N/A static frame get_sender_for_C_frame(frame *fr);

0N/A

0N/A // return current frame. pc() and sp() are set to NULL on failure.

0N/A static frame current_frame();

0N/A

0N/A static void print_hex_dump(outputStream* st, address start, address end, int unitsize);

0N/A

0N/A // returns a string to describe the exception/signal;

0N/A // returns NULL if exception_code is not an OS exception/signal.

0N/A static const char* exception_name(int exception_code, char* buf, size_t buflen);

0N/A

0N/A // Returns native Java library, loads if necessary

0N/A static void* native_java_library();

0N/A

1887N/A // Fills in path to jvm.dll/libjvm.so (used by the Disassembler)

0N/A static void jvm_path(char *buf, jint buflen);

0N/A

1601N/A // Returns true if we are running in a headless jre.

1601N/A static bool is_headless_jre();

1601N/A

0N/A // JNI names

0N/A static void print_jni_name_prefix_on(outputStream* st, int args_size);

0N/A static void print_jni_name_suffix_on(outputStream* st, int args_size);

0N/A

0N/A // File conventions

0N/A static const char* file_separator();

0N/A static const char* line_separator();

0N/A static const char* path_separator();

0N/A

0N/A // Init os specific system properties values

0N/A static void init_system_properties_values();

0N/A

0N/A // IO operations, non-JVM_ version.

0N/A static int stat(const char* path, struct stat* sbuf);

0N/A static bool dir_is_empty(const char* path);

0N/A

0N/A // IO operations on binary files

0N/A static int create_binary_file(const char* path, bool rewrite_existing);

0N/A static jlong current_file_offset(int fd);

0N/A static jlong seek_to_file_offset(int fd, jlong offset);

0N/A

0N/A // Thread Local Storage

0N/A static int allocate_thread_local_storage();

0N/A static void thread_local_storage_at_put(int index, void* value);

0N/A static void* thread_local_storage_at(int index);

0N/A static void free_thread_local_storage(int index);

0N/A

3863N/A // Stack walk

3863N/A static address get_caller_pc(int n = 0);

3863N/A

0N/A // General allocation (must be MT-safe)

3863N/A static void* malloc (size_t size, MEMFLAGS flags, address caller_pc = 0);

3863N/A static void* realloc (void *memblock, size_t size, MEMFLAGS flags, address caller_pc = 0);

3863N/A static void free (void *memblock, MEMFLAGS flags = mtNone);

0N/A static bool check_heap(bool force = false); // verify C heap integrity

3863N/A static char* strdup(const char *, MEMFLAGS flags = mtInternal); // Like strdup

0N/A

0N/A#ifndef PRODUCT

2122N/A static julong num_mallocs; // # of calls to malloc/realloc

2122N/A static julong alloc_bytes; // # of bytes allocated

2122N/A static julong num_frees; // # of calls to free

2122N/A static julong free_bytes; // # of bytes freed

0N/A#endif

0N/A

1887N/A // SocketInterface (ex HPI SocketInterface )

1887N/A static int socket(int domain, int type, int protocol);

1887N/A static int socket_close(int fd);

1887N/A static int socket_shutdown(int fd, int howto);

2993N/A static int recv(int fd, char* buf, size_t nBytes, uint flags);

2993N/A static int send(int fd, char* buf, size_t nBytes, uint flags);

2993N/A static int raw_send(int fd, char* buf, size_t nBytes, uint flags);

1887N/A static int timeout(int fd, long timeout);

1887N/A static int listen(int fd, int count);

2993N/A static int connect(int fd, struct sockaddr* him, socklen_t len);

2993N/A static int bind(int fd, struct sockaddr* him, socklen_t len);

2993N/A static int accept(int fd, struct sockaddr* him, socklen_t* len);

2993N/A static int recvfrom(int fd, char* buf, size_t nbytes, uint flags,

2993N/A struct sockaddr* from, socklen_t* fromlen);

2993N/A static int get_sock_name(int fd, struct sockaddr* him, socklen_t* len);

2993N/A static int sendto(int fd, char* buf, size_t len, uint flags,

2993N/A struct sockaddr* to, socklen_t tolen);

2993N/A static int socket_available(int fd, jint* pbytes);

1887N/A

1887N/A static int get_sock_opt(int fd, int level, int optname,

2993N/A char* optval, socklen_t* optlen);

1887N/A static int set_sock_opt(int fd, int level, int optname,

2993N/A const char* optval, socklen_t optlen);

1887N/A static int get_host_name(char* name, int namelen);

1887N/A

2993N/A static struct hostent* get_host_by_name(char* name);

1887N/A

0N/A // Printing 64 bit integers

0N/A static const char* jlong_format_specifier();

0N/A static const char* julong_format_specifier();

0N/A

0N/A // Support for signals (see JVM_RaiseSignal, JVM_RegisterSignal)

0N/A static void signal_init();

0N/A static void signal_init_pd();

0N/A static void signal_notify(int signal_number);

0N/A static void* signal(int signal_number, void* handler);

0N/A static void signal_raise(int signal_number);

0N/A static int signal_wait();

0N/A static int signal_lookup();

0N/A static void* user_handler();

0N/A static void terminate_signal_thread();

0N/A static int sigexitnum_pd();

0N/A

0N/A // random number generation

0N/A static long random(); // return 32bit pseudorandom number

0N/A static void init_random(long initval); // initialize random sequence

0N/A

0N/A // Structured OS Exception support

0N/A static void os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread);

0N/A

2085N/A // On Windows this will create an actual minidump, on Linux/Solaris it will simply check core dump limits

2085N/A static void check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize);

2085N/A

3866N/A // Get the default path to the core file

3866N/A // Returns the length of the string

3866N/A static int get_core_path(char* buffer, size_t bufferSize);

3866N/A

0N/A // JVMTI & JVM monitoring and management support

0N/A // The thread_cpu_time() and current_thread_cpu_time() are only

0N/A // supported if is_thread_cpu_time_supported() returns true.

0N/A // They are not supported on Solaris T1.

0N/A

0N/A // Thread CPU Time - return the fast estimate on a platform

0N/A // On Solaris - call gethrvtime (fast) - user time only

0N/A // On Linux - fast clock_gettime where available - user+sys

0N/A // - otherwise: very slow /proc fs - user+sys

0N/A // On Windows - GetThreadTimes - user+sys

0N/A static jlong current_thread_cpu_time();

0N/A static jlong thread_cpu_time(Thread* t);

0N/A

0N/A // Thread CPU Time with user_sys_cpu_time parameter.

0N/A //

0N/A // If user_sys_cpu_time is true, user+sys time is returned.

0N/A // Otherwise, only user time is returned

0N/A static jlong current_thread_cpu_time(bool user_sys_cpu_time);

0N/A static jlong thread_cpu_time(Thread* t, bool user_sys_cpu_time);

0N/A

0N/A // Return a bunch of info about the timers.

0N/A // Note that the returned info for these two functions may be different

0N/A // on some platforms

0N/A static void current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr);

0N/A static void thread_cpu_time_info(jvmtiTimerInfo *info_ptr);

0N/A

0N/A static bool is_thread_cpu_time_supported();

0N/A

0N/A // System loadavg support. Returns -1 if load average cannot be obtained.

0N/A static int loadavg(double loadavg[], int nelem);

0N/A

0N/A // Hook for os specific jvm options that we don't want to abort on seeing

0N/A static bool obsolete_option(const JavaVMOption *option);

0N/A

2316N/A // Read file line by line. If line is longer than bsize,

2316N/A // rest of line is skipped. Returns number of bytes read or -1 on EOF

2316N/A static int get_line_chars(int fd, char *buf, const size_t bsize);

2316N/A

3029N/A // Extensions

3029N/A#include "runtime/os_ext.hpp"

3029N/A

3029N/A public:

3029N/A

0N/A // Platform dependent stuff

1879N/A#ifdef TARGET_OS_FAMILY_linux

1879N/A# include "os_linux.hpp"

3380N/A# include "os_posix.hpp"

1879N/A#endif

1879N/A#ifdef TARGET_OS_FAMILY_solaris

1879N/A# include "os_solaris.hpp"

3380N/A# include "os_posix.hpp"

1879N/A#endif

1879N/A#ifdef TARGET_OS_FAMILY_windows

1879N/A# include "os_windows.hpp"

1879N/A#endif

2796N/A#ifdef TARGET_OS_FAMILY_bsd

3380N/A# include "os_posix.hpp"

2796N/A# include "os_bsd.hpp"

2796N/A#endif

1879N/A#ifdef TARGET_OS_ARCH_linux_x86

1879N/A# include "os_linux_x86.hpp"

1879N/A#endif

1879N/A#ifdef TARGET_OS_ARCH_linux_sparc

1879N/A# include "os_linux_sparc.hpp"

1879N/A#endif

1879N/A#ifdef TARGET_OS_ARCH_linux_zero

1879N/A# include "os_linux_zero.hpp"

1879N/A#endif

1879N/A#ifdef TARGET_OS_ARCH_solaris_x86

1879N/A# include "os_solaris_x86.hpp"

1879N/A#endif

1879N/A#ifdef TARGET_OS_ARCH_solaris_sparc

1879N/A# include "os_solaris_sparc.hpp"

1879N/A#endif

1879N/A#ifdef TARGET_OS_ARCH_windows_x86

1879N/A# include "os_windows_x86.hpp"

1879N/A#endif

2073N/A#ifdef TARGET_OS_ARCH_linux_arm

2073N/A# include "os_linux_arm.hpp"

2073N/A#endif

2073N/A#ifdef TARGET_OS_ARCH_linux_ppc

2073N/A# include "os_linux_ppc.hpp"

2073N/A#endif

2796N/A#ifdef TARGET_OS_ARCH_bsd_x86

2796N/A# include "os_bsd_x86.hpp"

2796N/A#endif

2796N/A#ifdef TARGET_OS_ARCH_bsd_zero

2796N/A# include "os_bsd_zero.hpp"

2796N/A#endif

1879N/A

3029N/A public:

1601N/A // debugging support (mostly used by debug.cpp but also fatal error handler)

1601N/A static bool find(address pc, outputStream* st = tty); // OS specific function to make sense out of an address

0N/A

0N/A static bool dont_yield(); // when true, JVM_Yield() is nop

0N/A static void print_statistics();

0N/A

0N/A // Thread priority helpers (implemented in OS-specific part)

0N/A static OSReturn set_native_priority(Thread* thread, int native_prio);

0N/A static OSReturn get_native_priority(const Thread* const thread, int* priority_ptr);

3137N/A static int java_to_os_priority[CriticalPriority + 1];

0N/A // Hint to the underlying OS that a task switch would not be good.

0N/A // Void return because it's a hint and can fail.

0N/A static void hint_no_preempt();

0N/A

0N/A // Used at creation if requested by the diagnostic flag PauseAtStartup.

0N/A // Causes the VM to wait until an external stimulus has been applied

0N/A // (for Unix, that stimulus is a signal, for Windows, an external

0N/A // ResumeThread call)

0N/A static void pause();

0N/A

4141N/A class SuspendedThreadTaskContext {

4141N/A public:

4141N/A SuspendedThreadTaskContext(Thread* thread, void *ucontext) : _thread(thread), _ucontext(ucontext) {}

4141N/A Thread* thread() const { return _thread; }

4141N/A void* ucontext() const { return _ucontext; }

4141N/A private:

4141N/A Thread* _thread;

4141N/A void* _ucontext;

4141N/A };

4141N/A

4141N/A class SuspendedThreadTask {

4141N/A public:

4141N/A SuspendedThreadTask(Thread* thread) : _thread(thread), _done(false) {}

4141N/A virtual ~SuspendedThreadTask() {}

4141N/A void run();

4141N/A bool is_done() { return _done; }

4141N/A virtual void do_task(const SuspendedThreadTaskContext& context) = 0;

4141N/A protected:

4141N/A private:

4141N/A void internal_do_task();

4141N/A Thread* _thread;

4141N/A bool _done;

4141N/A };

4141N/A

4141N/A#ifndef TARGET_OS_FAMILY_windows

4141N/A // Suspend/resume support

4141N/A // Protocol:

4141N/A //

4141N/A // a thread starts in SR_RUNNING

4141N/A //

4141N/A // SR_RUNNING can go to

4141N/A // * SR_SUSPEND_REQUEST when the WatcherThread wants to suspend it

4141N/A // SR_SUSPEND_REQUEST can go to

4141N/A // * SR_RUNNING if WatcherThread decides it waited for SR_SUSPENDED too long (timeout)

4141N/A // * SR_SUSPENDED if the stopped thread receives the signal and switches state

4141N/A // SR_SUSPENDED can go to

4141N/A // * SR_WAKEUP_REQUEST when the WatcherThread has done the work and wants to resume

4141N/A // SR_WAKEUP_REQUEST can go to

4141N/A // * SR_RUNNING when the stopped thread receives the signal

4141N/A // * SR_WAKEUP_REQUEST on timeout (resend the signal and try again)

4141N/A class SuspendResume {

4141N/A public:

4141N/A enum State {

4141N/A SR_RUNNING,

4141N/A SR_SUSPEND_REQUEST,

4141N/A SR_SUSPENDED,

4141N/A SR_WAKEUP_REQUEST

4141N/A };

4141N/A

4141N/A private:

4141N/A volatile State _state;

4141N/A

4141N/A private:

4141N/A /* try to switch state from state "from" to state "to"

4141N/A State switch_state(State from, State to) {

4141N/A State result = (State) Atomic::cmpxchg((jint) to, (jint *) &_state, (jint) from);

4141N/A if (result == from) {

4141N/A // success

4141N/A return to;

4141N/A }

4141N/A return result;

4141N/A }

4141N/A

4141N/A public:

4141N/A SuspendResume() : _state(SR_RUNNING) { }

4141N/A

4141N/A State state() const { return _state; }

4141N/A

4141N/A State request_suspend() {

4141N/A return switch_state(SR_RUNNING, SR_SUSPEND_REQUEST);

4141N/A }

4141N/A

4141N/A State cancel_suspend() {

4141N/A return switch_state(SR_SUSPEND_REQUEST, SR_RUNNING);

4141N/A }

4141N/A

4141N/A State suspended() {

4141N/A return switch_state(SR_SUSPEND_REQUEST, SR_SUSPENDED);

4141N/A }

4141N/A

4141N/A State request_wakeup() {

4141N/A return switch_state(SR_SUSPENDED, SR_WAKEUP_REQUEST);

4141N/A }

4141N/A

4141N/A State running() {

4141N/A return switch_state(SR_WAKEUP_REQUEST, SR_RUNNING);

4141N/A }

4141N/A

4141N/A bool is_running() const {

4141N/A return _state == SR_RUNNING;

4141N/A }

4141N/A

4141N/A bool is_suspend_request() const {

4141N/A return _state == SR_SUSPEND_REQUEST;

4141N/A }

4141N/A

4141N/A bool is_suspended() const {

4141N/A return _state == SR_SUSPENDED;

4141N/A }

4141N/A };

4141N/A#endif

4141N/A

4141N/A

0N/A protected:

0N/A static long _rand_seed; // seed for random number generator

0N/A static int _processor_count; // number of processors

0N/A

0N/A static char* format_boot_path(const char* format_string,

0N/A const char* home,

0N/A int home_len,

0N/A char fileSep,

0N/A char pathSep);

0N/A static bool set_boot_path(char fileSep, char pathSep);

691N/A static char** split_path(const char* path, int* n);

0N/A};

0N/A

0N/A

0N/Aextern "C" int SpinPause () ;

0N/Aextern "C" int SafeFetch32 (int * adr, int errValue) ;

0N/Aextern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t errValue) ;

1879N/A

1879N/A#endif // SHARE_VM_RUNTIME_OS_HPP