1 /* 2 * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2007, 2008, 2010 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "incls/_precompiled.incl" 27 #include "incls/_stubGenerator_zero.cpp.incl" 28 29 // Declaration and definition of StubGenerator (no .hpp file). 30 // For a more detailed description of the stub routine structure 31 // see the comment in stubRoutines.hpp 32 33 class StubGenerator: public StubCodeGenerator { 34 private: 35 // The call stub is used to call Java from C 36 static void call_stub( 37 JavaCallWrapper *call_wrapper, 38 intptr_t* result, 39 BasicType result_type, 40 methodOop method, 41 address entry_point, 42 intptr_t* parameters, 43 int parameter_words, 44 TRAPS) { 45 JavaThread *thread = (JavaThread *) THREAD; 46 ZeroStack *stack = thread->zero_stack(); 47 48 // Make sure we have no pending exceptions 49 assert(!HAS_PENDING_EXCEPTION, "call_stub called with pending exception"); 50 51 // Set up the stack if necessary 52 bool stack_needs_teardown = false; 53 if (stack->needs_setup()) { 54 size_t zero_stack_size = stack->suggest_size(thread); 55 stack->setup(alloca(zero_stack_size), zero_stack_size); 56 stack_needs_teardown = true; 57 } 58 59 // Allocate and initialize our frame 60 EntryFrame *frame = 61 EntryFrame::build(parameters, parameter_words, call_wrapper, THREAD); 62 63 if (!HAS_PENDING_EXCEPTION) { 64 // Push the frame 65 thread->push_zero_frame(frame); 66 67 // Make the call 68 Interpreter::invoke_method(method, entry_point, THREAD); 69 70 // Store the result 71 if (!HAS_PENDING_EXCEPTION) { 72 switch (result_type) { 73 case T_INT: 74 *(jint *) result = *(jint *) stack->sp(); 75 break; 76 case T_LONG: 77 *(jlong *) result = *(jlong *) stack->sp(); 78 break; 79 case T_FLOAT: 80 *(jfloat *) result = *(jfloat *) stack->sp(); 81 break; 82 case T_DOUBLE: 83 *(jdouble *) result = *(jdouble *) stack->sp(); 84 break; 85 case T_OBJECT: 86 *(oop *) result = *(oop *) stack->sp(); 87 break; 88 default: 89 ShouldNotReachHere(); 90 } 91 } 92 93 // Unwind the frame 94 thread->pop_zero_frame(); 95 } 96 97 // Tear down the stack if necessary 98 if (stack_needs_teardown) 99 stack->teardown(); 100 } 101 102 // These stubs get called from some dumb test routine. 103 // I'll write them properly when they're called from 104 // something that's actually doing something. 105 static void fake_arraycopy_stub(address src, address dst, int count) { 106 assert(count == 0, "huh?"); 107 } 108 109 void generate_arraycopy_stubs() { 110 // Call the conjoint generation methods immediately after 111 // the disjoint ones so that short branches from the former 112 // to the latter can be generated. 113 StubRoutines::_jbyte_disjoint_arraycopy = (address) fake_arraycopy_stub; 114 StubRoutines::_jbyte_arraycopy = (address) fake_arraycopy_stub; 115 116 StubRoutines::_jshort_disjoint_arraycopy = (address) fake_arraycopy_stub; 117 StubRoutines::_jshort_arraycopy = (address) fake_arraycopy_stub; 118 119 StubRoutines::_jint_disjoint_arraycopy = (address) fake_arraycopy_stub; 120 StubRoutines::_jint_arraycopy = (address) fake_arraycopy_stub; 121 122 StubRoutines::_jlong_disjoint_arraycopy = (address) fake_arraycopy_stub; 123 StubRoutines::_jlong_arraycopy = (address) fake_arraycopy_stub; 124 125 StubRoutines::_oop_disjoint_arraycopy = ShouldNotCallThisStub(); 126 StubRoutines::_oop_arraycopy = ShouldNotCallThisStub(); 127 128 StubRoutines::_checkcast_arraycopy = ShouldNotCallThisStub(); 129 StubRoutines::_unsafe_arraycopy = ShouldNotCallThisStub(); 130 StubRoutines::_generic_arraycopy = ShouldNotCallThisStub(); 131 132 // We don't generate specialized code for HeapWord-aligned source 133 // arrays, so just use the code we've already generated 134 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = 135 StubRoutines::_jbyte_disjoint_arraycopy; 136 StubRoutines::_arrayof_jbyte_arraycopy = 137 StubRoutines::_jbyte_arraycopy; 138 139 StubRoutines::_arrayof_jshort_disjoint_arraycopy = 140 StubRoutines::_jshort_disjoint_arraycopy; 141 StubRoutines::_arrayof_jshort_arraycopy = 142 StubRoutines::_jshort_arraycopy; 143 144 StubRoutines::_arrayof_jint_disjoint_arraycopy = 145 StubRoutines::_jint_disjoint_arraycopy; 146 StubRoutines::_arrayof_jint_arraycopy = 147 StubRoutines::_jint_arraycopy; 148 149 StubRoutines::_arrayof_jlong_disjoint_arraycopy = 150 StubRoutines::_jlong_disjoint_arraycopy; 151 StubRoutines::_arrayof_jlong_arraycopy = 152 StubRoutines::_jlong_arraycopy; 153 154 StubRoutines::_arrayof_oop_disjoint_arraycopy = 155 StubRoutines::_oop_disjoint_arraycopy; 156 StubRoutines::_arrayof_oop_arraycopy = 157 StubRoutines::_oop_arraycopy; 158 } 159 160 void generate_initial() { 161 // Generates all stubs and initializes the entry points 162 163 // entry points that exist in all platforms Note: This is code 164 // that could be shared among different platforms - however the 165 // benefit seems to be smaller than the disadvantage of having a 166 // much more complicated generator structure. See also comment in 167 // stubRoutines.hpp. 168 169 StubRoutines::_forward_exception_entry = ShouldNotCallThisStub(); 170 StubRoutines::_call_stub_entry = (address) call_stub; 171 StubRoutines::_catch_exception_entry = ShouldNotCallThisStub(); 172 173 // atomic calls 174 StubRoutines::_atomic_xchg_entry = ShouldNotCallThisStub(); 175 StubRoutines::_atomic_xchg_ptr_entry = ShouldNotCallThisStub(); 176 StubRoutines::_atomic_cmpxchg_entry = ShouldNotCallThisStub(); 177 StubRoutines::_atomic_cmpxchg_ptr_entry = ShouldNotCallThisStub(); 178 StubRoutines::_atomic_cmpxchg_long_entry = ShouldNotCallThisStub(); 179 StubRoutines::_atomic_add_entry = ShouldNotCallThisStub(); 180 StubRoutines::_atomic_add_ptr_entry = ShouldNotCallThisStub(); 181 StubRoutines::_fence_entry = ShouldNotCallThisStub(); 182 183 // amd64 does this here, sparc does it in generate_all() 184 StubRoutines::_handler_for_unsafe_access_entry = 185 ShouldNotCallThisStub(); 186 } 187 188 void generate_all() { 189 // Generates all stubs and initializes the entry points 190 191 // These entry points require SharedInfo::stack0 to be set up in 192 // non-core builds and need to be relocatable, so they each 193 // fabricate a RuntimeStub internally. 194 StubRoutines::_throw_AbstractMethodError_entry = 195 ShouldNotCallThisStub(); 196 197 StubRoutines::_throw_ArithmeticException_entry = 198 ShouldNotCallThisStub(); 199 200 StubRoutines::_throw_NullPointerException_entry = 201 ShouldNotCallThisStub(); 202 203 StubRoutines::_throw_NullPointerException_at_call_entry = 204 ShouldNotCallThisStub(); 205 206 StubRoutines::_throw_StackOverflowError_entry = 207 ShouldNotCallThisStub(); 208 209 // support for verify_oop (must happen after universe_init) 210 StubRoutines::_verify_oop_subroutine_entry = 211 ShouldNotCallThisStub(); 212 213 // arraycopy stubs used by compilers 214 generate_arraycopy_stubs(); 215 } 216 217 public: 218 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { 219 if (all) { 220 generate_all(); 221 } else { 222 generate_initial(); 223 } 224 } 225 }; 226 227 void StubGenerator_generate(CodeBuffer* code, bool all) { 228 StubGenerator g(code, all); 229 } 230 231 EntryFrame *EntryFrame::build(const intptr_t* parameters, 232 int parameter_words, 233 JavaCallWrapper* call_wrapper, 234 TRAPS) { 235 236 ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack(); 237 stack->overflow_check(header_words + parameter_words, CHECK_NULL); 238 239 stack->push(0); // next_frame, filled in later 240 intptr_t *fp = stack->sp(); 241 assert(fp - stack->sp() == next_frame_off, "should be"); 242 243 stack->push(ENTRY_FRAME); 244 assert(fp - stack->sp() == frame_type_off, "should be"); 245 246 stack->push((intptr_t) call_wrapper); 247 assert(fp - stack->sp() == call_wrapper_off, "should be"); 248 249 for (int i = 0; i < parameter_words; i++) 250 stack->push(parameters[i]); 251 252 return (EntryFrame *) fp; 253 }