Mercurial > hg > graal-compiler
annotate src/share/vm/asm/assembler.hpp @ 6266:1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
6984705: JSR 292 method handle creation should not go through JNI
Summary: remove assembly code for JDK 7 chained method handles
Reviewed-by: jrose, twisti, kvn, mhaupt
Contributed-by: John Rose <john.r.rose@oracle.com>, Christian Thalinger <christian.thalinger@oracle.com>, Michael Haupt <michael.haupt@oracle.com>
| author | twisti |
|---|---|
| date | Tue, 24 Jul 2012 10:51:00 -0700 |
| parents | 40c2484c09e1 |
| children | b9a9ed0f8eeb |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_ASM_ASSEMBLER_HPP |
| 26 #define SHARE_VM_ASM_ASSEMBLER_HPP | |
| 27 | |
| 28 #include "code/oopRecorder.hpp" | |
| 29 #include "code/relocInfo.hpp" | |
| 30 #include "memory/allocation.hpp" | |
| 31 #include "utilities/debug.hpp" | |
| 32 #include "utilities/growableArray.hpp" | |
| 33 #include "utilities/top.hpp" | |
| 34 #ifdef TARGET_ARCH_x86 | |
| 35 # include "register_x86.hpp" | |
| 36 # include "vm_version_x86.hpp" | |
| 37 #endif | |
| 38 #ifdef TARGET_ARCH_sparc | |
| 39 # include "register_sparc.hpp" | |
| 40 # include "vm_version_sparc.hpp" | |
| 41 #endif | |
| 42 #ifdef TARGET_ARCH_zero | |
| 43 # include "register_zero.hpp" | |
| 44 # include "vm_version_zero.hpp" | |
| 45 #endif | |
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46 #ifdef TARGET_ARCH_arm |
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47 # include "register_arm.hpp" |
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48 # include "vm_version_arm.hpp" |
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49 #endif |
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50 #ifdef TARGET_ARCH_ppc |
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51 # include "register_ppc.hpp" |
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52 # include "vm_version_ppc.hpp" |
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53 #endif |
| 1972 | 54 |
| 605 | 55 // This file contains platform-independent assembler declarations. |
| 0 | 56 |
| 57 class CodeBuffer; | |
| 58 class MacroAssembler; | |
| 59 class AbstractAssembler; | |
| 60 class Label; | |
| 61 | |
| 62 /** | |
| 63 * Labels represent destinations for control transfer instructions. Such | |
| 64 * instructions can accept a Label as their target argument. A Label is | |
| 65 * bound to the current location in the code stream by calling the | |
| 66 * MacroAssembler's 'bind' method, which in turn calls the Label's 'bind' | |
| 67 * method. A Label may be referenced by an instruction before it's bound | |
| 68 * (i.e., 'forward referenced'). 'bind' stores the current code offset | |
| 69 * in the Label object. | |
| 70 * | |
| 71 * If an instruction references a bound Label, the offset field(s) within | |
| 72 * the instruction are immediately filled in based on the Label's code | |
| 73 * offset. If an instruction references an unbound label, that | |
| 74 * instruction is put on a list of instructions that must be patched | |
| 75 * (i.e., 'resolved') when the Label is bound. | |
| 76 * | |
| 77 * 'bind' will call the platform-specific 'patch_instruction' method to | |
| 78 * fill in the offset field(s) for each unresolved instruction (if there | |
| 79 * are any). 'patch_instruction' lives in one of the | |
| 80 * cpu/<arch>/vm/assembler_<arch>* files. | |
| 81 * | |
| 82 * Instead of using a linked list of unresolved instructions, a Label has | |
| 83 * an array of unresolved instruction code offsets. _patch_index | |
| 84 * contains the total number of forward references. If the Label's array | |
| 85 * overflows (i.e., _patch_index grows larger than the array size), a | |
| 86 * GrowableArray is allocated to hold the remaining offsets. (The cache | |
| 87 * size is 4 for now, which handles over 99.5% of the cases) | |
| 88 * | |
| 89 * Labels may only be used within a single CodeSection. If you need | |
| 90 * to create references between code sections, use explicit relocations. | |
| 91 */ | |
| 92 class Label VALUE_OBJ_CLASS_SPEC { | |
| 93 private: | |
| 94 enum { PatchCacheSize = 4 }; | |
| 95 | |
| 96 // _loc encodes both the binding state (via its sign) | |
| 97 // and the binding locator (via its value) of a label. | |
| 98 // | |
| 99 // _loc >= 0 bound label, loc() encodes the target (jump) position | |
| 100 // _loc == -1 unbound label | |
| 101 int _loc; | |
| 102 | |
| 103 // References to instructions that jump to this unresolved label. | |
| 104 // These instructions need to be patched when the label is bound | |
| 105 // using the platform-specific patchInstruction() method. | |
| 106 // | |
| 107 // To avoid having to allocate from the C-heap each time, we provide | |
| 108 // a local cache and use the overflow only if we exceed the local cache | |
| 109 int _patches[PatchCacheSize]; | |
| 110 int _patch_index; | |
| 111 GrowableArray<int>* _patch_overflow; | |
| 112 | |
| 113 Label(const Label&) { ShouldNotReachHere(); } | |
| 114 | |
| 115 public: | |
| 116 | |
| 117 /** | |
| 118 * After binding, be sure 'patch_instructions' is called later to link | |
| 119 */ | |
| 120 void bind_loc(int loc) { | |
| 121 assert(loc >= 0, "illegal locator"); | |
| 122 assert(_loc == -1, "already bound"); | |
| 123 _loc = loc; | |
| 124 } | |
| 125 void bind_loc(int pos, int sect); // = bind_loc(locator(pos, sect)) | |
| 126 | |
| 127 #ifndef PRODUCT | |
| 128 // Iterates over all unresolved instructions for printing | |
| 129 void print_instructions(MacroAssembler* masm) const; | |
| 130 #endif // PRODUCT | |
| 131 | |
| 132 /** | |
| 133 * Returns the position of the the Label in the code buffer | |
| 134 * The position is a 'locator', which encodes both offset and section. | |
| 135 */ | |
| 136 int loc() const { | |
| 137 assert(_loc >= 0, "unbound label"); | |
| 138 return _loc; | |
| 139 } | |
| 140 int loc_pos() const; // == locator_pos(loc()) | |
| 141 int loc_sect() const; // == locator_sect(loc()) | |
| 142 | |
| 143 bool is_bound() const { return _loc >= 0; } | |
| 144 bool is_unbound() const { return _loc == -1 && _patch_index > 0; } | |
| 145 bool is_unused() const { return _loc == -1 && _patch_index == 0; } | |
| 146 | |
| 147 /** | |
| 148 * Adds a reference to an unresolved displacement instruction to | |
| 149 * this unbound label | |
| 150 * | |
| 151 * @param cb the code buffer being patched | |
| 152 * @param branch_loc the locator of the branch instruction in the code buffer | |
| 153 */ | |
| 154 void add_patch_at(CodeBuffer* cb, int branch_loc); | |
| 155 | |
| 156 /** | |
| 157 * Iterate over the list of patches, resolving the instructions | |
| 158 * Call patch_instruction on each 'branch_loc' value | |
| 159 */ | |
| 160 void patch_instructions(MacroAssembler* masm); | |
| 161 | |
| 162 void init() { | |
| 163 _loc = -1; | |
| 164 _patch_index = 0; | |
| 165 _patch_overflow = NULL; | |
| 166 } | |
| 167 | |
| 168 Label() { | |
| 169 init(); | |
| 170 } | |
| 171 }; | |
| 172 | |
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173 // A union type for code which has to assemble both constant and |
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174 // non-constant operands, when the distinction cannot be made |
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175 // statically. |
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176 class RegisterOrConstant VALUE_OBJ_CLASS_SPEC { |
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177 private: |
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178 Register _r; |
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179 intptr_t _c; |
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180 |
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181 public: |
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182 RegisterOrConstant(): _r(noreg), _c(0) {} |
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183 RegisterOrConstant(Register r): _r(r), _c(0) {} |
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184 RegisterOrConstant(intptr_t c): _r(noreg), _c(c) {} |
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185 |
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186 Register as_register() const { assert(is_register(),""); return _r; } |
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187 intptr_t as_constant() const { assert(is_constant(),""); return _c; } |
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188 |
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189 Register register_or_noreg() const { return _r; } |
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190 intptr_t constant_or_zero() const { return _c; } |
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191 |
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192 bool is_register() const { return _r != noreg; } |
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193 bool is_constant() const { return _r == noreg; } |
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194 }; |
| 0 | 195 |
| 196 // The Abstract Assembler: Pure assembler doing NO optimizations on the | |
| 197 // instruction level; i.e., what you write is what you get. | |
| 198 // The Assembler is generating code into a CodeBuffer. | |
| 199 class AbstractAssembler : public ResourceObj { | |
| 200 friend class Label; | |
| 201 | |
| 202 protected: | |
| 203 CodeSection* _code_section; // section within the code buffer | |
| 204 address _code_begin; // first byte of code buffer | |
| 205 address _code_limit; // first byte after code buffer | |
| 206 address _code_pos; // current code generation position | |
| 207 OopRecorder* _oop_recorder; // support for relocInfo::oop_type | |
| 208 | |
| 209 // Code emission & accessing | |
| 210 address addr_at(int pos) const { return _code_begin + pos; } | |
| 211 | |
| 212 // This routine is called with a label is used for an address. | |
| 213 // Labels and displacements truck in offsets, but target must return a PC. | |
| 214 address target(Label& L); // return _code_section->target(L) | |
| 215 | |
| 216 bool is8bit(int x) const { return -0x80 <= x && x < 0x80; } | |
| 217 bool isByte(int x) const { return 0 <= x && x < 0x100; } | |
| 218 bool isShiftCount(int x) const { return 0 <= x && x < 32; } | |
| 219 | |
| 220 void emit_byte(int x); // emit a single byte | |
| 221 void emit_word(int x); // emit a 16-bit word (not a wordSize word!) | |
| 222 void emit_long(jint x); // emit a 32-bit word (not a longSize word!) | |
| 223 void emit_address(address x); // emit an address (not a longSize word!) | |
| 224 | |
| 225 // Instruction boundaries (required when emitting relocatable values). | |
| 226 class InstructionMark: public StackObj { | |
| 227 private: | |
| 228 AbstractAssembler* _assm; | |
| 229 | |
| 230 public: | |
| 231 InstructionMark(AbstractAssembler* assm) : _assm(assm) { | |
| 232 assert(assm->inst_mark() == NULL, "overlapping instructions"); | |
| 233 _assm->set_inst_mark(); | |
| 234 } | |
| 235 ~InstructionMark() { | |
| 236 _assm->clear_inst_mark(); | |
| 237 } | |
| 238 }; | |
| 239 friend class InstructionMark; | |
| 240 #ifdef ASSERT | |
| 241 // Make it return true on platforms which need to verify | |
| 242 // instruction boundaries for some operations. | |
| 243 inline static bool pd_check_instruction_mark(); | |
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244 |
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245 // Add delta to short branch distance to verify that it still fit into imm8. |
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246 int _short_branch_delta; |
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247 |
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248 int short_branch_delta() const { return _short_branch_delta; } |
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249 void set_short_branch_delta() { _short_branch_delta = 32; } |
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250 void clear_short_branch_delta() { _short_branch_delta = 0; } |
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251 |
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252 class ShortBranchVerifier: public StackObj { |
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253 private: |
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254 AbstractAssembler* _assm; |
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255 |
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256 public: |
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257 ShortBranchVerifier(AbstractAssembler* assm) : _assm(assm) { |
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258 assert(assm->short_branch_delta() == 0, "overlapping instructions"); |
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259 _assm->set_short_branch_delta(); |
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260 } |
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261 ~ShortBranchVerifier() { |
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262 _assm->clear_short_branch_delta(); |
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263 } |
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264 }; |
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265 #else |
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266 // Dummy in product. |
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267 class ShortBranchVerifier: public StackObj { |
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268 public: |
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269 ShortBranchVerifier(AbstractAssembler* assm) {} |
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270 }; |
| 0 | 271 #endif |
| 272 | |
| 273 // Label functions | |
| 274 void print(Label& L); | |
| 275 | |
| 276 public: | |
| 277 | |
| 278 // Creation | |
| 279 AbstractAssembler(CodeBuffer* code); | |
| 280 | |
| 281 // save end pointer back to code buf. | |
| 282 void sync(); | |
| 283 | |
| 284 // ensure buf contains all code (call this before using/copying the code) | |
| 285 void flush(); | |
| 286 | |
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287 // min and max values for signed immediate ranges |
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288 static int min_simm(int nbits) { return -(intptr_t(1) << (nbits - 1)) ; } |
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289 static int max_simm(int nbits) { return (intptr_t(1) << (nbits - 1)) - 1; } |
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290 |
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291 // Define some: |
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292 static int min_simm10() { return min_simm(10); } |
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293 static int min_simm13() { return min_simm(13); } |
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294 static int min_simm16() { return min_simm(16); } |
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295 |
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296 // Test if x is within signed immediate range for nbits |
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297 static bool is_simm(intptr_t x, int nbits) { return min_simm(nbits) <= x && x <= max_simm(nbits); } |
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298 |
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299 // Define some: |
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300 static bool is_simm5( intptr_t x) { return is_simm(x, 5 ); } |
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301 static bool is_simm8( intptr_t x) { return is_simm(x, 8 ); } |
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302 static bool is_simm10(intptr_t x) { return is_simm(x, 10); } |
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303 static bool is_simm11(intptr_t x) { return is_simm(x, 11); } |
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304 static bool is_simm12(intptr_t x) { return is_simm(x, 12); } |
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305 static bool is_simm13(intptr_t x) { return is_simm(x, 13); } |
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306 static bool is_simm16(intptr_t x) { return is_simm(x, 16); } |
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307 static bool is_simm26(intptr_t x) { return is_simm(x, 26); } |
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308 static bool is_simm32(intptr_t x) { return is_simm(x, 32); } |
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309 |
| 0 | 310 // Accessors |
| 311 CodeBuffer* code() const; // _code_section->outer() | |
| 312 CodeSection* code_section() const { return _code_section; } | |
| 313 int sect() const; // return _code_section->index() | |
| 314 address pc() const { return _code_pos; } | |
| 315 int offset() const { return _code_pos - _code_begin; } | |
| 316 int locator() const; // CodeBuffer::locator(offset(), sect()) | |
| 317 OopRecorder* oop_recorder() const { return _oop_recorder; } | |
| 318 void set_oop_recorder(OopRecorder* r) { _oop_recorder = r; } | |
| 319 | |
| 320 address inst_mark() const; | |
| 321 void set_inst_mark(); | |
| 322 void clear_inst_mark(); | |
| 323 | |
| 324 // Constants in code | |
| 325 void a_byte(int x); | |
| 326 void a_long(jint x); | |
| 327 void relocate(RelocationHolder const& rspec, int format = 0); | |
| 328 void relocate( relocInfo::relocType rtype, int format = 0) { | |
| 329 if (rtype != relocInfo::none) | |
| 330 relocate(Relocation::spec_simple(rtype), format); | |
| 331 } | |
| 332 | |
| 333 static int code_fill_byte(); // used to pad out odd-sized code buffers | |
| 334 | |
| 335 // Associate a comment with the current offset. It will be printed | |
| 336 // along with the disassembly when printing nmethods. Currently | |
| 337 // only supported in the instruction section of the code buffer. | |
| 338 void block_comment(const char* comment); | |
| 339 | |
| 340 // Label functions | |
| 341 void bind(Label& L); // binds an unbound label L to the current code position | |
| 342 | |
| 343 // Move to a different section in the same code buffer. | |
| 344 void set_code_section(CodeSection* cs); | |
| 345 | |
| 346 // Inform assembler when generating stub code and relocation info | |
| 347 address start_a_stub(int required_space); | |
| 348 void end_a_stub(); | |
| 349 // Ditto for constants. | |
| 350 address start_a_const(int required_space, int required_align = sizeof(double)); | |
| 351 void end_a_const(); | |
| 352 | |
| 2008 | 353 // constants support |
| 354 address long_constant(jlong c) { | |
| 355 address ptr = start_a_const(sizeof(c), sizeof(c)); | |
| 356 if (ptr != NULL) { | |
| 357 *(jlong*)ptr = c; | |
| 358 _code_pos = ptr + sizeof(c); | |
| 359 end_a_const(); | |
| 360 } | |
| 361 return ptr; | |
| 362 } | |
| 0 | 363 address double_constant(jdouble c) { |
| 364 address ptr = start_a_const(sizeof(c), sizeof(c)); | |
| 365 if (ptr != NULL) { | |
| 366 *(jdouble*)ptr = c; | |
| 367 _code_pos = ptr + sizeof(c); | |
| 368 end_a_const(); | |
| 369 } | |
| 370 return ptr; | |
| 371 } | |
| 372 address float_constant(jfloat c) { | |
| 373 address ptr = start_a_const(sizeof(c), sizeof(c)); | |
| 374 if (ptr != NULL) { | |
| 375 *(jfloat*)ptr = c; | |
| 376 _code_pos = ptr + sizeof(c); | |
| 377 end_a_const(); | |
| 378 } | |
| 379 return ptr; | |
| 380 } | |
| 2008 | 381 address address_constant(address c) { |
| 382 address ptr = start_a_const(sizeof(c), sizeof(c)); | |
| 383 if (ptr != NULL) { | |
| 384 *(address*)ptr = c; | |
| 385 _code_pos = ptr + sizeof(c); | |
| 386 end_a_const(); | |
| 387 } | |
| 388 return ptr; | |
| 389 } | |
| 0 | 390 address address_constant(address c, RelocationHolder const& rspec) { |
| 391 address ptr = start_a_const(sizeof(c), sizeof(c)); | |
| 392 if (ptr != NULL) { | |
| 393 relocate(rspec); | |
| 394 *(address*)ptr = c; | |
| 395 _code_pos = ptr + sizeof(c); | |
| 396 end_a_const(); | |
| 397 } | |
| 398 return ptr; | |
| 399 } | |
| 400 | |
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401 // Bootstrapping aid to cope with delayed determination of constants. |
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402 // Returns a static address which will eventually contain the constant. |
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403 // The value zero (NULL) stands instead of a constant which is still uncomputed. |
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404 // Thus, the eventual value of the constant must not be zero. |
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405 // This is fine, since this is designed for embedding object field |
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406 // offsets in code which must be generated before the object class is loaded. |
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407 // Field offsets are never zero, since an object's header (mark word) |
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408 // is located at offset zero. |
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409 RegisterOrConstant delayed_value(int(*value_fn)(), Register tmp, int offset = 0); |
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410 RegisterOrConstant delayed_value(address(*value_fn)(), Register tmp, int offset = 0); |
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411 virtual RegisterOrConstant delayed_value_impl(intptr_t* delayed_value_addr, Register tmp, int offset) = 0; |
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412 // Last overloading is platform-dependent; look in assembler_<arch>.cpp. |
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413 static intptr_t* delayed_value_addr(int(*constant_fn)()); |
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414 static intptr_t* delayed_value_addr(address(*constant_fn)()); |
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415 static void update_delayed_values(); |
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416 |
| 0 | 417 // Bang stack to trigger StackOverflowError at a safe location |
| 418 // implementation delegates to machine-specific bang_stack_with_offset | |
| 419 void generate_stack_overflow_check( int frame_size_in_bytes ); | |
| 420 virtual void bang_stack_with_offset(int offset) = 0; | |
| 421 | |
| 422 | |
| 423 /** | |
| 424 * A platform-dependent method to patch a jump instruction that refers | |
| 425 * to this label. | |
| 426 * | |
| 427 * @param branch the location of the instruction to patch | |
| 428 * @param masm the assembler which generated the branch | |
| 429 */ | |
| 430 void pd_patch_instruction(address branch, address target); | |
| 431 | |
| 432 #ifndef PRODUCT | |
| 433 /** | |
| 434 * Platform-dependent method of printing an instruction that needs to be | |
| 435 * patched. | |
| 436 * | |
| 437 * @param branch the instruction to be patched in the buffer. | |
| 438 */ | |
| 439 static void pd_print_patched_instruction(address branch); | |
| 440 #endif // PRODUCT | |
| 441 }; | |
| 442 | |
| 1972 | 443 #ifdef TARGET_ARCH_x86 |
| 444 # include "assembler_x86.hpp" | |
| 445 #endif | |
| 446 #ifdef TARGET_ARCH_sparc | |
| 447 # include "assembler_sparc.hpp" | |
| 448 #endif | |
| 449 #ifdef TARGET_ARCH_zero | |
| 450 # include "assembler_zero.hpp" | |
| 451 #endif | |
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452 #ifdef TARGET_ARCH_arm |
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453 # include "assembler_arm.hpp" |
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454 #endif |
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455 #ifdef TARGET_ARCH_ppc |
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456 # include "assembler_ppc.hpp" |
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457 #endif |
| 1972 | 458 |
| 459 | |
| 460 #endif // SHARE_VM_ASM_ASSEMBLER_HPP |