15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef OS_LINUX_VM_OS_LINUX_HPP
26 #define OS_LINUX_VM_OS_LINUX_HPP
27
28 // Linux_OS defines the interface to Linux operating systems
29
30 // Information about the protection of the page at address '0' on this os.
31 static bool zero_page_read_protected() { return true; }
32
33 class Linux {
34 friend class os;
35 friend class TestReserveMemorySpecial;
36
37 static bool libjsig_is_loaded; // libjsig that interposes sigaction(),
38 // __sigaction(), signal() is loaded
39 static struct sigaction *(*get_signal_action)(int);
40 static struct sigaction *get_preinstalled_handler(int);
41 static void save_preinstalled_handler(int, struct sigaction&);
42
43 static void check_signal_handler(int sig);
44
45 static int (*_clock_gettime)(clockid_t, struct timespec *);
46 static int (*_pthread_getcpuclockid)(pthread_t, clockid_t *);
47 static int (*_pthread_setname_np)(pthread_t, const char*);
48
49 static address _initial_thread_stack_bottom;
50 static uintptr_t _initial_thread_stack_size;
51
52 static const char *_glibc_version;
53 static const char *_libpthread_version;
54
58 static GrowableArray<int>* _nindex_to_node;
59
60 // 0x00000000 = uninitialized,
61 // 0x01000000 = kernel version unknown,
62 // otherwise a 32-bit number:
63 // Ox00AABBCC
64 // AA, Major Version
65 // BB, Minor Version
66 // CC, Fix Version
67 static uint32_t _os_version;
68
69 protected:
70
71 static julong _physical_memory;
72 static pthread_t _main_thread;
73 static Mutex* _createThread_lock;
74 static int _page_size;
75
76 static julong available_memory();
77 static julong physical_memory() { return _physical_memory; }
78 static void initialize_system_info();
79
80 static int commit_memory_impl(char* addr, size_t bytes, bool exec);
81 static int commit_memory_impl(char* addr, size_t bytes,
82 size_t alignment_hint, bool exec);
83
84 static void set_glibc_version(const char *s) { _glibc_version = s; }
85 static void set_libpthread_version(const char *s) { _libpthread_version = s; }
86
87 static void rebuild_cpu_to_node_map();
88 static void rebuild_nindex_to_node_map();
89 static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; }
90 static GrowableArray<int>* nindex_to_node() { return _nindex_to_node; }
91
92 static size_t find_large_page_size();
93 static size_t setup_large_page_size();
94
95 static bool setup_large_page_type(size_t page_size);
96 static bool transparent_huge_pages_sanity_check(bool warn, size_t pages_size);
97 static bool hugetlbfs_sanity_check(bool warn, size_t page_size);
98
99 static char* reserve_memory_special_shm(size_t bytes, size_t alignment, char* req_addr, bool exec);
100 static char* reserve_memory_special_huge_tlbfs(size_t bytes, size_t alignment, char* req_addr, bool exec);
101 static char* reserve_memory_special_huge_tlbfs_only(size_t bytes, char* req_addr, bool exec);
102 static char* reserve_memory_special_huge_tlbfs_mixed(size_t bytes, size_t alignment, char* req_addr, bool exec);
103
104 static bool release_memory_special_impl(char* base, size_t bytes);
105 static bool release_memory_special_shm(char* base, size_t bytes);
106 static bool release_memory_special_huge_tlbfs(char* base, size_t bytes);
107
108 static void print_full_memory_info(outputStream* st);
109 static void print_distro_info(outputStream* st);
110 static void print_libversion_info(outputStream* st);
111
112 public:
113 static bool _stack_is_executable;
114 static void *dlopen_helper(const char *name, char *ebuf, int ebuflen);
115 static void *dll_load_in_vmthread(const char *name, char *ebuf, int ebuflen);
116
117 static void init_thread_fpu_state();
118 static int get_fpu_control_word();
119 static void set_fpu_control_word(int fpu_control);
120 static pthread_t main_thread(void) { return _main_thread; }
121 // returns kernel thread id (similar to LWP id on Solaris), which can be
122 // used to access /proc
123 static pid_t gettid();
124 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; }
125 static Mutex* createThread_lock(void) { return _createThread_lock; }
126 static void hotspot_sigmask(Thread* thread);
127
128 static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; }
|
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef OS_LINUX_VM_OS_LINUX_HPP
26 #define OS_LINUX_VM_OS_LINUX_HPP
27
28 // Linux_OS defines the interface to Linux operating systems
29
30 // Information about the protection of the page at address '0' on this os.
31 static bool zero_page_read_protected() { return true; }
32
33 class Linux {
34 friend class os;
35 friend class OSContainer;
36 friend class TestReserveMemorySpecial;
37
38 static bool libjsig_is_loaded; // libjsig that interposes sigaction(),
39 // __sigaction(), signal() is loaded
40 static struct sigaction *(*get_signal_action)(int);
41 static struct sigaction *get_preinstalled_handler(int);
42 static void save_preinstalled_handler(int, struct sigaction&);
43
44 static void check_signal_handler(int sig);
45
46 static int (*_clock_gettime)(clockid_t, struct timespec *);
47 static int (*_pthread_getcpuclockid)(pthread_t, clockid_t *);
48 static int (*_pthread_setname_np)(pthread_t, const char*);
49
50 static address _initial_thread_stack_bottom;
51 static uintptr_t _initial_thread_stack_size;
52
53 static const char *_glibc_version;
54 static const char *_libpthread_version;
55
59 static GrowableArray<int>* _nindex_to_node;
60
61 // 0x00000000 = uninitialized,
62 // 0x01000000 = kernel version unknown,
63 // otherwise a 32-bit number:
64 // Ox00AABBCC
65 // AA, Major Version
66 // BB, Minor Version
67 // CC, Fix Version
68 static uint32_t _os_version;
69
70 protected:
71
72 static julong _physical_memory;
73 static pthread_t _main_thread;
74 static Mutex* _createThread_lock;
75 static int _page_size;
76
77 static julong available_memory();
78 static julong physical_memory() { return _physical_memory; }
79 static void set_physical_memory(julong phys_mem) { _physical_memory = phys_mem; }
80 static int active_processor_count();
81
82 static void initialize_system_info();
83
84 static int commit_memory_impl(char* addr, size_t bytes, bool exec);
85 static int commit_memory_impl(char* addr, size_t bytes,
86 size_t alignment_hint, bool exec);
87
88 static void set_glibc_version(const char *s) { _glibc_version = s; }
89 static void set_libpthread_version(const char *s) { _libpthread_version = s; }
90
91 static void rebuild_cpu_to_node_map();
92 static void rebuild_nindex_to_node_map();
93 static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; }
94 static GrowableArray<int>* nindex_to_node() { return _nindex_to_node; }
95
96 static size_t find_large_page_size();
97 static size_t setup_large_page_size();
98
99 static bool setup_large_page_type(size_t page_size);
100 static bool transparent_huge_pages_sanity_check(bool warn, size_t pages_size);
101 static bool hugetlbfs_sanity_check(bool warn, size_t page_size);
102
103 static char* reserve_memory_special_shm(size_t bytes, size_t alignment, char* req_addr, bool exec);
104 static char* reserve_memory_special_huge_tlbfs(size_t bytes, size_t alignment, char* req_addr, bool exec);
105 static char* reserve_memory_special_huge_tlbfs_only(size_t bytes, char* req_addr, bool exec);
106 static char* reserve_memory_special_huge_tlbfs_mixed(size_t bytes, size_t alignment, char* req_addr, bool exec);
107
108 static bool release_memory_special_impl(char* base, size_t bytes);
109 static bool release_memory_special_shm(char* base, size_t bytes);
110 static bool release_memory_special_huge_tlbfs(char* base, size_t bytes);
111
112 static void print_full_memory_info(outputStream* st);
113 static void print_container_info(outputStream* st);
114 static void print_distro_info(outputStream* st);
115 static void print_libversion_info(outputStream* st);
116
117 public:
118 static bool _stack_is_executable;
119 static void *dlopen_helper(const char *name, char *ebuf, int ebuflen);
120 static void *dll_load_in_vmthread(const char *name, char *ebuf, int ebuflen);
121
122 static void init_thread_fpu_state();
123 static int get_fpu_control_word();
124 static void set_fpu_control_word(int fpu_control);
125 static pthread_t main_thread(void) { return _main_thread; }
126 // returns kernel thread id (similar to LWP id on Solaris), which can be
127 // used to access /proc
128 static pid_t gettid();
129 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; }
130 static Mutex* createThread_lock(void) { return _createThread_lock; }
131 static void hotspot_sigmask(Thread* thread);
132
133 static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; }
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