stubGenerator_zero.cpp revision 3602:da91efe96a93
1/* 2 * Copyright (c) 2003, 2012, 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/method.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 TARGET_OS_FAMILY_bsd 47# include "thread_bsd.inline.hpp" 48#endif 49#ifdef COMPILER2 50#include "opto/runtime.hpp" 51#endif 52 53// Declaration and definition of StubGenerator (no .hpp file). 54// For a more detailed description of the stub routine structure 55// see the comment in stubRoutines.hpp 56 57class StubGenerator: public StubCodeGenerator { 58 private: 59 // The call stub is used to call Java from C 60 static void call_stub( 61 JavaCallWrapper *call_wrapper, 62 intptr_t* result, 63 BasicType result_type, 64 Method* method, 65 address entry_point, 66 intptr_t* parameters, 67 int parameter_words, 68 TRAPS) { 69 JavaThread *thread = (JavaThread *) THREAD; 70 ZeroStack *stack = thread->zero_stack(); 71 72 // Make sure we have no pending exceptions 73 assert(!HAS_PENDING_EXCEPTION, "call_stub called with pending exception"); 74 75 // Set up the stack if necessary 76 bool stack_needs_teardown = false; 77 if (stack->needs_setup()) { 78 size_t zero_stack_size = stack->suggest_size(thread); 79 stack->setup(alloca(zero_stack_size), zero_stack_size); 80 stack_needs_teardown = true; 81 } 82 83 // Allocate and initialize our frame 84 EntryFrame *frame = 85 EntryFrame::build(parameters, parameter_words, call_wrapper, THREAD); 86 87 if (!HAS_PENDING_EXCEPTION) { 88 // Push the frame 89 thread->push_zero_frame(frame); 90 91 // Make the call 92 Interpreter::invoke_method(method, entry_point, THREAD); 93 94 // Store the result 95 if (!HAS_PENDING_EXCEPTION) { 96 switch (result_type) { 97 case T_INT: 98 *(jint *) result = *(jint *) stack->sp(); 99 break; 100 case T_LONG: 101 *(jlong *) result = *(jlong *) stack->sp(); 102 break; 103 case T_FLOAT: 104 *(jfloat *) result = *(jfloat *) stack->sp(); 105 break; 106 case T_DOUBLE: 107 *(jdouble *) result = *(jdouble *) stack->sp(); 108 break; 109 case T_OBJECT: 110 *(oop *) result = *(oop *) stack->sp(); 111 break; 112 default: 113 ShouldNotReachHere(); 114 } 115 } 116 117 // Unwind the frame 118 thread->pop_zero_frame(); 119 } 120 121 // Tear down the stack if necessary 122 if (stack_needs_teardown) 123 stack->teardown(); 124 } 125 126 // These stubs get called from some dumb test routine. 127 // I'll write them properly when they're called from 128 // something that's actually doing something. 129 static void fake_arraycopy_stub(address src, address dst, int count) { 130 assert(count == 0, "huh?"); 131 } 132 133 void generate_arraycopy_stubs() { 134 // Call the conjoint generation methods immediately after 135 // the disjoint ones so that short branches from the former 136 // to the latter can be generated. 137 StubRoutines::_jbyte_disjoint_arraycopy = (address) fake_arraycopy_stub; 138 StubRoutines::_jbyte_arraycopy = (address) fake_arraycopy_stub; 139 140 StubRoutines::_jshort_disjoint_arraycopy = (address) fake_arraycopy_stub; 141 StubRoutines::_jshort_arraycopy = (address) fake_arraycopy_stub; 142 143 StubRoutines::_jint_disjoint_arraycopy = (address) fake_arraycopy_stub; 144 StubRoutines::_jint_arraycopy = (address) fake_arraycopy_stub; 145 146 StubRoutines::_jlong_disjoint_arraycopy = (address) fake_arraycopy_stub; 147 StubRoutines::_jlong_arraycopy = (address) fake_arraycopy_stub; 148 149 StubRoutines::_oop_disjoint_arraycopy = ShouldNotCallThisStub(); 150 StubRoutines::_oop_arraycopy = ShouldNotCallThisStub(); 151 152 StubRoutines::_checkcast_arraycopy = ShouldNotCallThisStub(); 153 StubRoutines::_unsafe_arraycopy = ShouldNotCallThisStub(); 154 StubRoutines::_generic_arraycopy = ShouldNotCallThisStub(); 155 156 // We don't generate specialized code for HeapWord-aligned source 157 // arrays, so just use the code we've already generated 158 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = 159 StubRoutines::_jbyte_disjoint_arraycopy; 160 StubRoutines::_arrayof_jbyte_arraycopy = 161 StubRoutines::_jbyte_arraycopy; 162 163 StubRoutines::_arrayof_jshort_disjoint_arraycopy = 164 StubRoutines::_jshort_disjoint_arraycopy; 165 StubRoutines::_arrayof_jshort_arraycopy = 166 StubRoutines::_jshort_arraycopy; 167 168 StubRoutines::_arrayof_jint_disjoint_arraycopy = 169 StubRoutines::_jint_disjoint_arraycopy; 170 StubRoutines::_arrayof_jint_arraycopy = 171 StubRoutines::_jint_arraycopy; 172 173 StubRoutines::_arrayof_jlong_disjoint_arraycopy = 174 StubRoutines::_jlong_disjoint_arraycopy; 175 StubRoutines::_arrayof_jlong_arraycopy = 176 StubRoutines::_jlong_arraycopy; 177 178 StubRoutines::_arrayof_oop_disjoint_arraycopy = 179 StubRoutines::_oop_disjoint_arraycopy; 180 StubRoutines::_arrayof_oop_arraycopy = 181 StubRoutines::_oop_arraycopy; 182 } 183 184 void generate_initial() { 185 // Generates all stubs and initializes the entry points 186 187 // entry points that exist in all platforms Note: This is code 188 // that could be shared among different platforms - however the 189 // benefit seems to be smaller than the disadvantage of having a 190 // much more complicated generator structure. See also comment in 191 // stubRoutines.hpp. 192 193 StubRoutines::_forward_exception_entry = ShouldNotCallThisStub(); 194 StubRoutines::_call_stub_entry = (address) call_stub; 195 StubRoutines::_catch_exception_entry = ShouldNotCallThisStub(); 196 197 // atomic calls 198 StubRoutines::_atomic_xchg_entry = ShouldNotCallThisStub(); 199 StubRoutines::_atomic_xchg_ptr_entry = ShouldNotCallThisStub(); 200 StubRoutines::_atomic_cmpxchg_entry = ShouldNotCallThisStub(); 201 StubRoutines::_atomic_cmpxchg_ptr_entry = ShouldNotCallThisStub(); 202 StubRoutines::_atomic_cmpxchg_long_entry = ShouldNotCallThisStub(); 203 StubRoutines::_atomic_add_entry = ShouldNotCallThisStub(); 204 StubRoutines::_atomic_add_ptr_entry = ShouldNotCallThisStub(); 205 StubRoutines::_fence_entry = ShouldNotCallThisStub(); 206 207 // amd64 does this here, sparc does it in generate_all() 208 StubRoutines::_handler_for_unsafe_access_entry = 209 ShouldNotCallThisStub(); 210 } 211 212 void generate_all() { 213 // Generates all stubs and initializes the entry points 214 215 // These entry points require SharedInfo::stack0 to be set up in 216 // non-core builds and need to be relocatable, so they each 217 // fabricate a RuntimeStub internally. 218 StubRoutines::_throw_AbstractMethodError_entry = 219 ShouldNotCallThisStub(); 220 221 StubRoutines::_throw_NullPointerException_at_call_entry = 222 ShouldNotCallThisStub(); 223 224 StubRoutines::_throw_StackOverflowError_entry = 225 ShouldNotCallThisStub(); 226 227 // support for verify_oop (must happen after universe_init) 228 StubRoutines::_verify_oop_subroutine_entry = 229 ShouldNotCallThisStub(); 230 231 // arraycopy stubs used by compilers 232 generate_arraycopy_stubs(); 233 } 234 235 public: 236 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { 237 if (all) { 238 generate_all(); 239 } else { 240 generate_initial(); 241 } 242 } 243}; 244 245void StubGenerator_generate(CodeBuffer* code, bool all) { 246 StubGenerator g(code, all); 247} 248 249EntryFrame *EntryFrame::build(const intptr_t* parameters, 250 int parameter_words, 251 JavaCallWrapper* call_wrapper, 252 TRAPS) { 253 254 ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack(); 255 stack->overflow_check(header_words + parameter_words, CHECK_NULL); 256 257 stack->push(0); // next_frame, filled in later 258 intptr_t *fp = stack->sp(); 259 assert(fp - stack->sp() == next_frame_off, "should be"); 260 261 stack->push(ENTRY_FRAME); 262 assert(fp - stack->sp() == frame_type_off, "should be"); 263 264 stack->push((intptr_t) call_wrapper); 265 assert(fp - stack->sp() == call_wrapper_off, "should be"); 266 267 for (int i = 0; i < parameter_words; i++) 268 stack->push(parameters[i]); 269 270 return (EntryFrame *) fp; 271} 272