1 /* 2 * Copyright (c) 2003, 2010, 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 "precompiled.hpp" 27 #include "asm/assembler.hpp" 28 #include "assembler_zero.inline.hpp" 29 #include "interpreter/interpreter.hpp" 30 #include "nativeInst_zero.hpp" 31 #include "oops/instanceOop.hpp" 32 #include "oops/methodOop.hpp" 33 #include "oops/objArrayKlass.hpp" 34 #include "oops/oop.inline.hpp" 35 #include "prims/methodHandles.hpp" 36 #include "runtime/frame.inline.hpp" 37 #include "runtime/handles.inline.hpp" 38 #include "runtime/sharedRuntime.hpp" 39 #include "runtime/stubCodeGenerator.hpp" 40 #include "runtime/stubRoutines.hpp" 41 #include "stack_zero.inline.hpp" 42 #include "utilities/top.hpp" 43 #ifdef TARGET_OS_FAMILY_linux 44 # include "thread_linux.inline.hpp" 45 #endif 46 #ifdef COMPILER2 47 #include "opto/runtime.hpp" 48 #endif 49 50 // Declaration and definition of StubGenerator (no .hpp file). 51 // For a more detailed description of the stub routine structure 52 // see the comment in stubRoutines.hpp 53 54 class StubGenerator: public StubCodeGenerator { 55 private: 56 // The call stub is used to call Java from C 57 static void call_stub( 58 JavaCallWrapper *call_wrapper, 59 intptr_t* result, 60 BasicType result_type, 61 methodOop method, 62 address entry_point, 63 intptr_t* parameters, 64 int parameter_words, 65 TRAPS) { 66 JavaThread *thread = (JavaThread *) THREAD; 67 ZeroStack *stack = thread->zero_stack(); 68 69 // Make sure we have no pending exceptions 70 assert(!HAS_PENDING_EXCEPTION, "call_stub called with pending exception"); 71 72 // Set up the stack if necessary 73 bool stack_needs_teardown = false; 74 if (stack->needs_setup()) { 75 size_t zero_stack_size = stack->suggest_size(thread); 76 stack->setup(alloca(zero_stack_size), zero_stack_size); 77 stack_needs_teardown = true; 78 } 79 80 // Allocate and initialize our frame 81 EntryFrame *frame = 82 EntryFrame::build(parameters, parameter_words, call_wrapper, THREAD); 83 84 if (!HAS_PENDING_EXCEPTION) { 85 // Push the frame 86 thread->push_zero_frame(frame); 87 88 // Make the call 89 Interpreter::invoke_method(method, entry_point, THREAD); 90 91 // Store the result 92 if (!HAS_PENDING_EXCEPTION) { 93 switch (result_type) { 94 case T_INT: 95 *(jint *) result = *(jint *) stack->sp(); 96 break; 97 case T_LONG: 98 *(jlong *) result = *(jlong *) stack->sp(); 99 break; 100 case T_FLOAT: 101 *(jfloat *) result = *(jfloat *) stack->sp(); 102 break; 103 case T_DOUBLE: 104 *(jdouble *) result = *(jdouble *) stack->sp(); 105 break; 106 case T_OBJECT: 107 *(oop *) result = *(oop *) stack->sp(); 108 break; 109 default: 110 ShouldNotReachHere(); 111 } 112 } 113 114 // Unwind the frame 115 thread->pop_zero_frame(); 116 } 117 118 // Tear down the stack if necessary 119 if (stack_needs_teardown) 120 stack->teardown(); 121 } 122 123 // These stubs get called from some dumb test routine. 124 // I'll write them properly when they're called from 125 // something that's actually doing something. 126 static void fake_arraycopy_stub(address src, address dst, int count) { 127 assert(count == 0, "huh?"); 128 } 129 130 void generate_arraycopy_stubs() { 131 // Call the conjoint generation methods immediately after 132 // the disjoint ones so that short branches from the former 133 // to the latter can be generated. 134 StubRoutines::_jbyte_disjoint_arraycopy = (address) fake_arraycopy_stub; 135 StubRoutines::_jbyte_arraycopy = (address) fake_arraycopy_stub; 136 137 StubRoutines::_jshort_disjoint_arraycopy = (address) fake_arraycopy_stub; 138 StubRoutines::_jshort_arraycopy = (address) fake_arraycopy_stub; 139 140 StubRoutines::_jint_disjoint_arraycopy = (address) fake_arraycopy_stub; 141 StubRoutines::_jint_arraycopy = (address) fake_arraycopy_stub; 142 143 StubRoutines::_jlong_disjoint_arraycopy = (address) fake_arraycopy_stub; 144 StubRoutines::_jlong_arraycopy = (address) fake_arraycopy_stub; 145 146 StubRoutines::_oop_disjoint_arraycopy = ShouldNotCallThisStub(); 147 StubRoutines::_oop_arraycopy = ShouldNotCallThisStub(); 148 149 StubRoutines::_checkcast_arraycopy = ShouldNotCallThisStub(); 150 StubRoutines::_unsafe_arraycopy = ShouldNotCallThisStub(); 151 StubRoutines::_generic_arraycopy = ShouldNotCallThisStub(); 152 153 // We don't generate specialized code for HeapWord-aligned source 154 // arrays, so just use the code we've already generated 155 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = 156 StubRoutines::_jbyte_disjoint_arraycopy; 157 StubRoutines::_arrayof_jbyte_arraycopy = 158 StubRoutines::_jbyte_arraycopy; 159 160 StubRoutines::_arrayof_jshort_disjoint_arraycopy = 161 StubRoutines::_jshort_disjoint_arraycopy; 162 StubRoutines::_arrayof_jshort_arraycopy = 163 StubRoutines::_jshort_arraycopy; 164 165 StubRoutines::_arrayof_jint_disjoint_arraycopy = 166 StubRoutines::_jint_disjoint_arraycopy; 167 StubRoutines::_arrayof_jint_arraycopy = 168 StubRoutines::_jint_arraycopy; 169 170 StubRoutines::_arrayof_jlong_disjoint_arraycopy = 171 StubRoutines::_jlong_disjoint_arraycopy; 172 StubRoutines::_arrayof_jlong_arraycopy = 173 StubRoutines::_jlong_arraycopy; 174 175 StubRoutines::_arrayof_oop_disjoint_arraycopy = 176 StubRoutines::_oop_disjoint_arraycopy; 177 StubRoutines::_arrayof_oop_arraycopy = 178 StubRoutines::_oop_arraycopy; 179 } 180 181 void generate_initial() { 182 // Generates all stubs and initializes the entry points 183 184 // entry points that exist in all platforms Note: This is code 185 // that could be shared among different platforms - however the 186 // benefit seems to be smaller than the disadvantage of having a 187 // much more complicated generator structure. See also comment in 188 // stubRoutines.hpp. 189 190 StubRoutines::_forward_exception_entry = ShouldNotCallThisStub(); 191 StubRoutines::_call_stub_entry = (address) call_stub; 192 StubRoutines::_catch_exception_entry = ShouldNotCallThisStub(); 193 194 // atomic calls 195 StubRoutines::_atomic_xchg_entry = ShouldNotCallThisStub(); 196 StubRoutines::_atomic_xchg_ptr_entry = ShouldNotCallThisStub(); 197 StubRoutines::_atomic_cmpxchg_entry = ShouldNotCallThisStub(); 198 StubRoutines::_atomic_cmpxchg_ptr_entry = ShouldNotCallThisStub(); 199 StubRoutines::_atomic_cmpxchg_long_entry = ShouldNotCallThisStub(); 200 StubRoutines::_atomic_add_entry = ShouldNotCallThisStub(); 201 StubRoutines::_atomic_add_ptr_entry = ShouldNotCallThisStub(); 202 StubRoutines::_fence_entry = ShouldNotCallThisStub(); 203 204 // amd64 does this here, sparc does it in generate_all() 205 StubRoutines::_handler_for_unsafe_access_entry = 206 ShouldNotCallThisStub(); 207 } 208 209 void generate_all() { 210 // Generates all stubs and initializes the entry points 211 212 // These entry points require SharedInfo::stack0 to be set up in 213 // non-core builds and need to be relocatable, so they each 214 // fabricate a RuntimeStub internally. 215 StubRoutines::_throw_AbstractMethodError_entry = 216 ShouldNotCallThisStub(); 217 218 StubRoutines::_throw_ArithmeticException_entry = 219 ShouldNotCallThisStub(); 220 221 StubRoutines::_throw_NullPointerException_entry = 222 ShouldNotCallThisStub(); 223 224 StubRoutines::_throw_NullPointerException_at_call_entry = 225 ShouldNotCallThisStub(); 226 227 StubRoutines::_throw_StackOverflowError_entry = 228 ShouldNotCallThisStub(); 229 230 // support for verify_oop (must happen after universe_init) 231 StubRoutines::_verify_oop_subroutine_entry = 232 ShouldNotCallThisStub(); 233 234 // arraycopy stubs used by compilers 235 generate_arraycopy_stubs(); 236 } 237 238 public: 239 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { 240 if (all) { 241 generate_all(); 242 } else { 243 generate_initial(); 244 } 245 } 246 }; 247 248 void StubGenerator_generate(CodeBuffer* code, bool all) { 249 StubGenerator g(code, all); 250 } 251 252 EntryFrame *EntryFrame::build(const intptr_t* parameters, 253 int parameter_words, 254 JavaCallWrapper* call_wrapper, 255 TRAPS) { 256 257 ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack(); 258 stack->overflow_check(header_words + parameter_words, CHECK_NULL); 259 260 stack->push(0); // next_frame, filled in later 261 intptr_t *fp = stack->sp(); 262 assert(fp - stack->sp() == next_frame_off, "should be"); 263 264 stack->push(ENTRY_FRAME); 265 assert(fp - stack->sp() == frame_type_off, "should be"); 266 267 stack->push((intptr_t) call_wrapper); 268 assert(fp - stack->sp() == call_wrapper_off, "should be"); 269 270 for (int i = 0; i < parameter_words; i++) 271 stack->push(parameters[i]); 272 273 return (EntryFrame *) fp; 274 }