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comparison src/share/vm/code/relocInfo.hpp @ 13512:8085ce95b6f5

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reloc info for safepoint polls includes whether the poison page is far or near
author Doug Simon <doug.simon@oracle.com>
date Mon, 06 Jan 2014 13:41:59 +0100
parents 9758d9f36299
children fa5180b3c18e
comparison
equal deleted inserted replaced
13511:51e16c7a5685 13512:8085ce95b6f5
208 // This stub becomes the target of a static call which must be upgraded 208 // This stub becomes the target of a static call which must be upgraded
209 // to a virtual call (because the callee is interpreted). 209 // to a virtual call (because the callee is interpreted).
210 // See [About Offsets] below. 210 // See [About Offsets] below.
211 // //%note reloc_2 211 // //%note reloc_2
212 // 212 //
213 // relocInfo::poll_[return_]type -- a safepoint poll
214 // Value: none
215 // Instruction types: memory load or test
216 // Data: [] the associated set-oops are adjacent to the call
217 // [n] n is a poll_Relocation::pollingPageDistance value
218 //
213 // For example: 219 // For example:
214 // 220 //
215 // INSTRUCTIONS RELOC: TYPE PREFIX DATA 221 // INSTRUCTIONS RELOC: TYPE PREFIX DATA
216 // ------------ ---- ----------- 222 // ------------ ---- -----------
217 // sethi %hi(myObject), R oop_type [n(myObject)] 223 // sethi %hi(myObject), R oop_type [n(myObject)]
1269 private: 1275 private:
1270 friend class RelocIterator; 1276 friend class RelocIterator;
1271 section_word_Relocation() { } 1277 section_word_Relocation() { }
1272 }; 1278 };
1273 1279
1274
1275 class poll_Relocation : public Relocation { 1280 class poll_Relocation : public Relocation {
1281 public:
1282 enum pollingPageDistance {
1283 near,
1284 far
1285 };
1286 relocInfo::relocType type() { return relocInfo::poll_type; }
1276 bool is_data() { return true; } 1287 bool is_data() { return true; }
1277 relocInfo::relocType type() { return relocInfo::poll_type; }
1278 void fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest); 1288 void fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest);
1279 }; 1289 private:
1280 1290 pollingPageDistance _distance;
1281 class poll_return_Relocation : public Relocation { 1291 public:
1282 bool is_data() { return true; } 1292
1293 static RelocationHolder spec(poll_Relocation::pollingPageDistance distance) {
1294 RelocationHolder rh = newHolder();
1295 new(rh) poll_Relocation(distance);
1296 return rh;
1297 }
1298
1299 poll_Relocation(poll_Relocation::pollingPageDistance distance) {
1300 _distance = distance;
1301 }
1302 poll_Relocation::pollingPageDistance distance() { return _distance; }
1303
1304 void pack_data_to(CodeSection* dest);
1305 void unpack_data();
1306
1307 protected:
1308 friend class RelocIterator;
1309 poll_Relocation() { }
1310 };
1311
1312 class poll_return_Relocation : public poll_Relocation {
1313 public:
1283 relocInfo::relocType type() { return relocInfo::poll_return_type; } 1314 relocInfo::relocType type() { return relocInfo::poll_return_type; }
1284 void fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest); 1315
1316 static RelocationHolder spec(poll_Relocation::pollingPageDistance distance) {
1317 RelocationHolder rh = newHolder();
1318 new(rh) poll_return_Relocation(distance);
1319 return rh;
1320 }
1321
1322 poll_return_Relocation(poll_Relocation::pollingPageDistance distance) : poll_Relocation(distance) { }
1323
1324 private:
1325 friend class RelocIterator;
1326 poll_return_Relocation() { }
1285 }; 1327 };
1286 1328
1287 // We know all the xxx_Relocation classes, so now we can define these: 1329 // We know all the xxx_Relocation classes, so now we can define these:
1288 #define EACH_CASE(name) \ 1330 #define EACH_CASE(name) \
1289 inline name##_Relocation* RelocIterator::name##_reloc() { \ 1331 inline name##_Relocation* RelocIterator::name##_reloc() { \