1135 // An id of a speculation that JVMCI compiled code can use to further describe and
1136 // uniquely identify the speculative optimization guarded by the uncommon trap
1137 jlong _pending_failed_speculation;
1138
1139 // These fields are mutually exclusive in terms of live ranges.
1140 union {
1141 // Communicates the pc at which the most recent implicit exception occurred
1142 // from the signal handler to a deoptimization stub.
1143 address _implicit_exception_pc;
1144
1145 // Communicates an alternative call target to an i2c stub from a JavaCall .
1146 address _alternate_call_target;
1147 } _jvmci;
1148
1149 // Support for high precision, thread sensitive counters in JVMCI compiled code.
1150 jlong* _jvmci_counters;
1151
1152 public:
1153 static jlong* _jvmci_old_thread_counters;
1154 static void collect_counters(jlong* array, int length);
1155 private:
1156 #endif // INCLUDE_JVMCI
1157
1158 StackGuardState _stack_guard_state;
1159
1160 // Precompute the limit of the stack as used in stack overflow checks.
1161 // We load it from here to simplify the stack overflow check in assembly.
1162 address _stack_overflow_limit;
1163 address _reserved_stack_activation;
1164
1165 // Compiler exception handling (NOTE: The _exception_oop is *NOT* the same as _pending_exception. It is
1166 // used to temp. parsing values into and out of the runtime system during exception handling for compiled
1167 // code)
1168 volatile oop _exception_oop; // Exception thrown in compiled code
1169 volatile address _exception_pc; // PC where exception happened
1170 volatile address _exception_handler_pc; // PC for handler of exception
1171 volatile int _is_method_handle_return; // true (== 1) if the current exception PC is a MethodHandle call site.
1172
1173 private:
1174 // support for JNI critical regions
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1135 // An id of a speculation that JVMCI compiled code can use to further describe and
1136 // uniquely identify the speculative optimization guarded by the uncommon trap
1137 jlong _pending_failed_speculation;
1138
1139 // These fields are mutually exclusive in terms of live ranges.
1140 union {
1141 // Communicates the pc at which the most recent implicit exception occurred
1142 // from the signal handler to a deoptimization stub.
1143 address _implicit_exception_pc;
1144
1145 // Communicates an alternative call target to an i2c stub from a JavaCall .
1146 address _alternate_call_target;
1147 } _jvmci;
1148
1149 // Support for high precision, thread sensitive counters in JVMCI compiled code.
1150 jlong* _jvmci_counters;
1151
1152 public:
1153 static jlong* _jvmci_old_thread_counters;
1154 static void collect_counters(jlong* array, int length);
1155
1156 bool resize_counters(int current_size, int new_size);
1157
1158 static bool resize_all_jvmci_counters(int new_size);
1159
1160 private:
1161 #endif // INCLUDE_JVMCI
1162
1163 StackGuardState _stack_guard_state;
1164
1165 // Precompute the limit of the stack as used in stack overflow checks.
1166 // We load it from here to simplify the stack overflow check in assembly.
1167 address _stack_overflow_limit;
1168 address _reserved_stack_activation;
1169
1170 // Compiler exception handling (NOTE: The _exception_oop is *NOT* the same as _pending_exception. It is
1171 // used to temp. parsing values into and out of the runtime system during exception handling for compiled
1172 // code)
1173 volatile oop _exception_oop; // Exception thrown in compiled code
1174 volatile address _exception_pc; // PC where exception happened
1175 volatile address _exception_handler_pc; // PC for handler of exception
1176 volatile int _is_method_handle_return; // true (== 1) if the current exception PC is a MethodHandle call site.
1177
1178 private:
1179 // support for JNI critical regions
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