Mercurial > hg > truffle
annotate src/share/vm/code/vtableStubs.hpp @ 12264:b2e698d2276c
8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation
Summary: Enhance method resolution and resulting data structures, plus some refactoring.
Reviewed-by: twisti, acorn, jrose
| author | drchase |
|---|---|
| date | Fri, 13 Sep 2013 22:38:02 -0400 |
| parents | 9758d9f36299 |
| children | 9341a9963d36 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
12146
9758d9f36299
8021954: VM SIGSEGV during classloading on MacOS; hs_err_pid file produced
coleenp
parents:
6725
diff
changeset
|
2 * Copyright (c) 1997, 2013, 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_CODE_VTABLESTUBS_HPP |
| 26 #define SHARE_VM_CODE_VTABLESTUBS_HPP | |
| 27 | |
|
1983
c760f78e0a53
7003125: precompiled.hpp is included when precompiled headers are not used
stefank
parents:
1972
diff
changeset
|
28 #include "code/vmreg.hpp" |
| 1972 | 29 #include "memory/allocation.hpp" |
| 30 | |
| 0 | 31 // A VtableStub holds an individual code stub for a pair (vtable index, #args) for either itables or vtables |
| 32 // There's a one-to-one relationship between a VtableStub and such a pair. | |
| 33 | |
| 34 class VtableStub { | |
| 35 private: | |
| 36 friend class VtableStubs; | |
| 37 | |
| 38 static address _chunk; // For allocation | |
| 39 static address _chunk_end; // For allocation | |
| 40 static VMReg _receiver_location; // Where to find receiver | |
| 41 | |
| 42 VtableStub* _next; // Pointer to next entry in hash table | |
| 43 const short _index; // vtable index | |
| 44 short _ame_offset; // Where an AbstractMethodError might occur | |
| 45 short _npe_offset; // Where a NullPointerException might occur | |
| 46 bool _is_vtable_stub; // True if vtable stub, false, is itable stub | |
| 47 /* code follows here */ // The vtableStub code | |
| 48 | |
|
12146
9758d9f36299
8021954: VM SIGSEGV during classloading on MacOS; hs_err_pid file produced
coleenp
parents:
6725
diff
changeset
|
49 void* operator new(size_t size, int code_size) throw(); |
| 0 | 50 |
| 51 VtableStub(bool is_vtable_stub, int index) | |
| 52 : _next(NULL), _is_vtable_stub(is_vtable_stub), | |
| 53 _index(index), _ame_offset(-1), _npe_offset(-1) {} | |
| 54 VtableStub* next() const { return _next; } | |
| 55 int index() const { return _index; } | |
| 56 static VMReg receiver_location() { return _receiver_location; } | |
| 57 void set_next(VtableStub* n) { _next = n; } | |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
1983
diff
changeset
|
58 |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
1983
diff
changeset
|
59 public: |
| 0 | 60 address code_begin() const { return (address)(this + 1); } |
| 61 address code_end() const { return code_begin() + pd_code_size_limit(_is_vtable_stub); } | |
| 62 address entry_point() const { return code_begin(); } | |
| 63 static int entry_offset() { return sizeof(class VtableStub); } | |
| 64 | |
| 65 bool matches(bool is_vtable_stub, int index) const { | |
| 66 return _index == index && _is_vtable_stub == is_vtable_stub; | |
| 67 } | |
| 68 bool contains(address pc) const { return code_begin() <= pc && pc < code_end(); } | |
| 69 | |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
1983
diff
changeset
|
70 private: |
| 0 | 71 void set_exception_points(address npe_addr, address ame_addr) { |
| 72 _npe_offset = npe_addr - code_begin(); | |
| 73 _ame_offset = ame_addr - code_begin(); | |
| 74 assert(is_abstract_method_error(ame_addr), "offset must be correct"); | |
| 75 assert(is_null_pointer_exception(npe_addr), "offset must be correct"); | |
| 76 assert(!is_abstract_method_error(npe_addr), "offset must be correct"); | |
| 77 assert(!is_null_pointer_exception(ame_addr), "offset must be correct"); | |
| 78 } | |
| 79 | |
| 80 // platform-dependent routines | |
| 81 static int pd_code_size_limit(bool is_vtable_stub); | |
| 82 static int pd_code_alignment(); | |
| 83 // CNC: Removed because vtable stubs are now made with an ideal graph | |
| 84 // static bool pd_disregard_arg_size(); | |
| 85 | |
| 86 static void align_chunk() { | |
| 87 uintptr_t off = (uintptr_t)( _chunk + sizeof(VtableStub) ) % pd_code_alignment(); | |
| 88 if (off != 0) _chunk += pd_code_alignment() - off; | |
| 89 } | |
| 90 | |
| 91 public: | |
| 92 // Query | |
| 93 bool is_itable_stub() { return !_is_vtable_stub; } | |
| 94 bool is_vtable_stub() { return _is_vtable_stub; } | |
| 95 bool is_abstract_method_error(address epc) { return epc == code_begin()+_ame_offset; } | |
| 96 bool is_null_pointer_exception(address epc) { return epc == code_begin()+_npe_offset; } | |
| 97 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1552
diff
changeset
|
98 void print_on(outputStream* st) const; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1552
diff
changeset
|
99 void print() const { print_on(tty); } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1552
diff
changeset
|
100 |
| 0 | 101 }; |
| 102 | |
| 103 | |
| 104 // VtableStubs creates the code stubs for compiled calls through vtables. | |
| 105 // There is one stub per (vtable index, args_size) pair, and the stubs are | |
| 106 // never deallocated. They don't need to be GCed because they contain no oops. | |
| 107 | |
| 108 class VtableStubs : AllStatic { | |
| 109 public: // N must be public (some compilers need this for _table) | |
| 110 enum { | |
| 111 N = 256, // size of stub table; must be power of two | |
| 112 mask = N - 1 | |
| 113 }; | |
| 114 | |
| 115 private: | |
| 116 static VtableStub* _table[N]; // table of existing stubs | |
| 117 static int _number_of_vtable_stubs; // number of stubs created so far (for statistics) | |
| 118 | |
| 119 static VtableStub* create_vtable_stub(int vtable_index); | |
| 120 static VtableStub* create_itable_stub(int vtable_index); | |
| 121 static VtableStub* lookup (bool is_vtable_stub, int vtable_index); | |
| 122 static void enter (bool is_vtable_stub, int vtable_index, VtableStub* s); | |
| 123 static inline uint hash (bool is_vtable_stub, int vtable_index); | |
|
12264
b2e698d2276c
8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation
drchase
parents:
12146
diff
changeset
|
124 static address find_stub (bool is_vtable_stub, int vtable_index); |
| 0 | 125 |
| 126 public: | |
|
12264
b2e698d2276c
8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation
drchase
parents:
12146
diff
changeset
|
127 static address find_vtable_stub(int vtable_index) { return find_stub(true, vtable_index); } |
|
b2e698d2276c
8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation
drchase
parents:
12146
diff
changeset
|
128 static address find_itable_stub(int itable_index) { return find_stub(false, itable_index); } |
| 0 | 129 static bool is_entry_point(address pc); // is pc a vtable stub entry point? |
| 130 static bool contains(address pc); // is pc within any stub? | |
| 131 static VtableStub* stub_containing(address pc); // stub containing pc or NULL | |
| 132 static int number_of_vtable_stubs() { return _number_of_vtable_stubs; } | |
| 133 static void initialize(); | |
| 134 }; | |
| 1972 | 135 |
| 136 #endif // SHARE_VM_CODE_VTABLESTUBS_HPP |