99 static void *dll_load_in_vmthread(const char *name, char *ebuf, int ebuflen);
100
101 static void init_thread_fpu_state();
102 static int get_fpu_control_word();
103 static void set_fpu_control_word(int fpu_control);
104 static pthread_t main_thread(void) { return _main_thread; }
105 // returns kernel thread id (similar to LWP id on Solaris), which can be
106 // used to access /proc
107 static pid_t gettid();
108 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; }
109 static Mutex* createThread_lock(void) { return _createThread_lock; }
110 static void hotspot_sigmask(Thread* thread);
111
112 static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; }
113 static uintptr_t initial_thread_stack_size(void) { return _initial_thread_stack_size; }
114 static bool is_initial_thread(void);
115
116 static int page_size(void) { return _page_size; }
117 static void set_page_size(int val) { _page_size = val; }
118
119 static address ucontext_get_pc(ucontext_t* uc);
120 static intptr_t* ucontext_get_sp(ucontext_t* uc);
121 static intptr_t* ucontext_get_fp(ucontext_t* uc);
122
123 // For Analyzer Forte AsyncGetCallTrace profiling support:
124 //
125 // This interface should be declared in os_linux_i486.hpp, but
126 // that file provides extensions to the os class and not the
127 // Linux class.
128 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc,
129 intptr_t** ret_sp, intptr_t** ret_fp);
130
131 // This boolean allows users to forward their own non-matching signals
132 // to JVM_handle_linux_signal, harmlessly.
133 static bool signal_handlers_are_installed;
134
135 static int get_our_sigflags(int);
136 static void set_our_sigflags(int, int);
137 static void signal_sets_init();
138 static void install_signal_handlers();
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99 static void *dll_load_in_vmthread(const char *name, char *ebuf, int ebuflen);
100
101 static void init_thread_fpu_state();
102 static int get_fpu_control_word();
103 static void set_fpu_control_word(int fpu_control);
104 static pthread_t main_thread(void) { return _main_thread; }
105 // returns kernel thread id (similar to LWP id on Solaris), which can be
106 // used to access /proc
107 static pid_t gettid();
108 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; }
109 static Mutex* createThread_lock(void) { return _createThread_lock; }
110 static void hotspot_sigmask(Thread* thread);
111
112 static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; }
113 static uintptr_t initial_thread_stack_size(void) { return _initial_thread_stack_size; }
114 static bool is_initial_thread(void);
115
116 static int page_size(void) { return _page_size; }
117 static void set_page_size(int val) { _page_size = val; }
118
119 // The HotSpot VM used the OS page size as the base for the computation of other sizes
120 // (e.g. the min. stack size). These computations can become bogus now that the default
121 // page sizes on various platforms are constantly increasing.
122 // This method returns the historical standard page size of the platform (which is 4K on Linux)
123 static int vm_default_page_size(void) { return 4 * K; }
124
125 static address ucontext_get_pc(ucontext_t* uc);
126 static intptr_t* ucontext_get_sp(ucontext_t* uc);
127 static intptr_t* ucontext_get_fp(ucontext_t* uc);
128
129 // For Analyzer Forte AsyncGetCallTrace profiling support:
130 //
131 // This interface should be declared in os_linux_i486.hpp, but
132 // that file provides extensions to the os class and not the
133 // Linux class.
134 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc,
135 intptr_t** ret_sp, intptr_t** ret_fp);
136
137 // This boolean allows users to forward their own non-matching signals
138 // to JVM_handle_linux_signal, harmlessly.
139 static bool signal_handlers_are_installed;
140
141 static int get_our_sigflags(int);
142 static void set_our_sigflags(int, int);
143 static void signal_sets_init();
144 static void install_signal_handlers();
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