100 // Returns the byte size of a virtual memory page
101 static int vm_page_size() { return _vm_page_size; }
102
103 // Returns the size in bytes of memory blocks which can be allocated.
104 static int vm_allocation_granularity() { return _vm_allocation_granularity; }
105
106 // Read the headers for the executable that started the current process into
107 // the structure passed in (see winnt.h).
108 static void read_executable_headers(PIMAGE_NT_HEADERS);
109
110 // Default stack size for the current process.
111 static size_t default_stack_size() { return _default_stack_size; }
112
113 #ifndef _WIN64
114 // A wrapper to install a structured exception handler for fast JNI accesors.
115 static address fast_jni_accessor_wrapper(BasicType);
116 #endif
117
118 // filter function to ignore faults on serializations page
119 static LONG WINAPI serialize_fault_filter(struct _EXCEPTION_POINTERS* e);
120 };
121
122 /*
123 * Crash protection for the watcher thread. Wrap the callback
124 * with a __try { call() }
125 * To be able to use this - don't take locks, don't rely on destructors,
126 * don't make OS library calls, don't allocate memory, don't print,
127 * don't call code that could leave the heap / memory in an inconsistent state,
128 * or anything else where we are not in control if we suddenly jump out.
129 */
130 class WatcherThreadCrashProtection : public StackObj {
131 public:
132 WatcherThreadCrashProtection();
133 bool call(os::CrashProtectionCallback& cb);
134 };
135
136 class PlatformEvent : public CHeapObj<mtInternal> {
137 private:
138 double CachePad [4] ; // increase odds that _Event is sole occupant of cache line
139 volatile int _Event ;
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100 // Returns the byte size of a virtual memory page
101 static int vm_page_size() { return _vm_page_size; }
102
103 // Returns the size in bytes of memory blocks which can be allocated.
104 static int vm_allocation_granularity() { return _vm_allocation_granularity; }
105
106 // Read the headers for the executable that started the current process into
107 // the structure passed in (see winnt.h).
108 static void read_executable_headers(PIMAGE_NT_HEADERS);
109
110 // Default stack size for the current process.
111 static size_t default_stack_size() { return _default_stack_size; }
112
113 #ifndef _WIN64
114 // A wrapper to install a structured exception handler for fast JNI accesors.
115 static address fast_jni_accessor_wrapper(BasicType);
116 #endif
117
118 // filter function to ignore faults on serializations page
119 static LONG WINAPI serialize_fault_filter(struct _EXCEPTION_POINTERS* e);
120
121 // Fast access to current thread
122 protected:
123 static int _thread_ptr_offset;
124 private:
125 static void initialize_thread_ptr_offset();
126 public:
127 static inline void set_thread_ptr_offset(int offset) {
128 _thread_ptr_offset = offset;
129 }
130 static inline int get_thread_ptr_offset() { return _thread_ptr_offset; }
131 };
132
133 /*
134 * Crash protection for the watcher thread. Wrap the callback
135 * with a __try { call() }
136 * To be able to use this - don't take locks, don't rely on destructors,
137 * don't make OS library calls, don't allocate memory, don't print,
138 * don't call code that could leave the heap / memory in an inconsistent state,
139 * or anything else where we are not in control if we suddenly jump out.
140 */
141 class WatcherThreadCrashProtection : public StackObj {
142 public:
143 WatcherThreadCrashProtection();
144 bool call(os::CrashProtectionCallback& cb);
145 };
146
147 class PlatformEvent : public CHeapObj<mtInternal> {
148 private:
149 double CachePad [4] ; // increase odds that _Event is sole occupant of cache line
150 volatile int _Event ;
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