98 BasicType vt = (BasicType)i;
99 BasicType ft = type2field[vt];
100 switch (vt) {
101 // the following types might plausibly show up in memory layouts:
102 case T_BOOLEAN:
103 case T_BYTE:
104 case T_CHAR:
105 case T_SHORT:
106 case T_INT:
107 case T_FLOAT:
108 case T_DOUBLE:
109 case T_LONG:
110 case T_OBJECT:
111 case T_VALUETYPE:
112 case T_ADDRESS: // random raw pointer
113 case T_METADATA: // metadata pointer
114 case T_NARROWOOP: // compressed pointer
115 case T_NARROWKLASS: // compressed klass pointer
116 case T_CONFLICT: // might as well support a bottom type
117 case T_VOID: // padding or other unaddressed word
118 case T_VALUETYPEPTR:
119 // layout type must map to itself
120 assert(vt == ft, "");
121 break;
122 default:
123 // non-layout type must map to a (different) layout type
124 assert(vt != ft, "");
125 assert(ft == type2field[ft], "");
126 }
127 // every type must map to same-sized layout type:
128 assert(type2size[vt] == type2size[ft], "");
129 }
130 }
131 // These are assumed, e.g., when filling HeapWords with juints.
132 assert(is_power_of_2(sizeof(juint)), "juint must be power of 2");
133 assert(is_power_of_2(HeapWordSize), "HeapWordSize must be power of 2");
134 assert((size_t)HeapWordSize >= sizeof(juint),
135 "HeapWord should be at least as large as juint");
136 assert(sizeof(NULL) == sizeof(char*), "NULL must be same size as pointer");
137 #endif
138
163 // Size info for oops within java objects is fixed
164 heapOopSize = jintSize;
165 LogBytesPerHeapOop = LogBytesPerInt;
166 LogBitsPerHeapOop = LogBitsPerInt;
167 BytesPerHeapOop = BytesPerInt;
168 BitsPerHeapOop = BitsPerInt;
169 } else {
170 heapOopSize = oopSize;
171 LogBytesPerHeapOop = LogBytesPerWord;
172 LogBitsPerHeapOop = LogBitsPerWord;
173 BytesPerHeapOop = BytesPerWord;
174 BitsPerHeapOop = BitsPerWord;
175 }
176 _type2aelembytes[T_OBJECT] = heapOopSize;
177 _type2aelembytes[T_ARRAY] = heapOopSize;
178 _type2aelembytes[T_VALUETYPE] = heapOopSize;
179 }
180
181
182 // Map BasicType to signature character
183 char type2char_tab[T_CONFLICT+1]={ 0, 0, 0, 0, 'Z', 'C', 'F', 'D', 'B', 'S', 'I', 'J', 'L', '[', 'Q', 'V', 0, 0, 0, 0, 0, 0};
184
185 // Map BasicType to Java type name
186 const char* type2name_tab[T_CONFLICT+1] = {
187 NULL, NULL, NULL, NULL,
188 "boolean",
189 "char",
190 "float",
191 "double",
192 "byte",
193 "short",
194 "int",
195 "long",
196 "object",
197 "array",
198 "valuetype",
199 "void",
200 "*address*",
201 "*narrowoop*",
202 "*metadata*",
203 "*narrowklass*",
204 "valuetypeptr",
205 "*conflict*"
206 };
207
208
209 BasicType name2type(const char* name) {
210 for (int i = T_BOOLEAN; i <= T_VOID; i++) {
211 BasicType t = (BasicType)i;
212 if (type2name_tab[t] != NULL && 0 == strcmp(type2name_tab[t], name))
213 return t;
214 }
215 return T_ILLEGAL;
216 }
217
218 // Map BasicType to size in words
219 int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 0, 1, 1, 1, 1, 1, -1};
220
221 BasicType type2field[T_CONFLICT+1] = {
222 (BasicType)0, // 0,
223 (BasicType)0, // 1,
224 (BasicType)0, // 2,
225 (BasicType)0, // 3,
226 T_BOOLEAN, // T_BOOLEAN = 4,
227 T_CHAR, // T_CHAR = 5,
228 T_FLOAT, // T_FLOAT = 6,
229 T_DOUBLE, // T_DOUBLE = 7,
230 T_BYTE, // T_BYTE = 8,
231 T_SHORT, // T_SHORT = 9,
232 T_INT, // T_INT = 10,
233 T_LONG, // T_LONG = 11,
234 T_OBJECT, // T_OBJECT = 12,
235 T_OBJECT, // T_ARRAY = 13,
236 T_VALUETYPE, // T_VALUETYPE = 14,
237 T_VOID, // T_VOID = 15,
238 T_ADDRESS, // T_ADDRESS = 16,
239 T_NARROWOOP, // T_NARROWOOP= 17,
240 T_METADATA, // T_METADATA = 18,
241 T_NARROWKLASS, // T_NARROWKLASS = 19,
242 T_VALUETYPEPTR, // T_VALUETYPEPTR = 20,
243 T_CONFLICT // T_CONFLICT = 21,
244 };
245
246
247 BasicType type2wfield[T_CONFLICT+1] = {
248 (BasicType)0, // 0,
249 (BasicType)0, // 1,
250 (BasicType)0, // 2,
251 (BasicType)0, // 3,
252 T_INT, // T_BOOLEAN = 4,
253 T_INT, // T_CHAR = 5,
254 T_FLOAT, // T_FLOAT = 6,
255 T_DOUBLE, // T_DOUBLE = 7,
256 T_INT, // T_BYTE = 8,
257 T_INT, // T_SHORT = 9,
258 T_INT, // T_INT = 10,
259 T_LONG, // T_LONG = 11,
260 T_OBJECT, // T_OBJECT = 12,
261 T_OBJECT, // T_ARRAY = 13,
262 T_VALUETYPE, // T_VALUETYPE = 14,
263 T_VOID, // T_VOID = 15,
264 T_ADDRESS, // T_ADDRESS = 16,
265 T_NARROWOOP, // T_NARROWOOP = 17,
266 T_METADATA, // T_METADATA = 18,
267 T_NARROWKLASS, // T_NARROWKLASS = 19,
268 T_VALUETYPEPTR,// T_VALUETYPEPTR = 20,
269 T_CONFLICT // T_CONFLICT = 21,
270 };
271
272
273 int _type2aelembytes[T_CONFLICT+1] = {
274 0, // 0
275 0, // 1
276 0, // 2
277 0, // 3
278 T_BOOLEAN_aelem_bytes, // T_BOOLEAN = 4,
279 T_CHAR_aelem_bytes, // T_CHAR = 5,
280 T_FLOAT_aelem_bytes, // T_FLOAT = 6,
281 T_DOUBLE_aelem_bytes, // T_DOUBLE = 7,
282 T_BYTE_aelem_bytes, // T_BYTE = 8,
283 T_SHORT_aelem_bytes, // T_SHORT = 9,
284 T_INT_aelem_bytes, // T_INT = 10,
285 T_LONG_aelem_bytes, // T_LONG = 11,
286 T_OBJECT_aelem_bytes, // T_OBJECT = 12,
287 T_ARRAY_aelem_bytes, // T_ARRAY = 13,
288 T_VALUETYPE_aelem_bytes, // T_VALUETYPE = 14,
289 0, // T_VOID = 15,
290 T_OBJECT_aelem_bytes, // T_ADDRESS = 16,
291 T_NARROWOOP_aelem_bytes, // T_NARROWOOP= 17,
292 T_OBJECT_aelem_bytes, // T_METADATA = 18,
293 T_NARROWKLASS_aelem_bytes, // T_NARROWKLASS= 19,
294 T_VALUETYPEPTR_aelem_bytes,// T_VALUETYPEPTR = 20,
295 0 // T_CONFLICT = 21,
296 };
297
298 #ifdef ASSERT
299 int type2aelembytes(BasicType t, bool allow_address) {
300 assert(allow_address || t != T_ADDRESS, " ");
301 return _type2aelembytes[t];
302 }
303 #endif
304
305 // Support for 64-bit integer arithmetic
306
307 // The following code is mostly taken from JVM typedefs_md.h and system_md.c
308
309 static const jlong high_bit = (jlong)1 << (jlong)63;
310 static const jlong other_bits = ~high_bit;
311
312 jlong float2long(jfloat f) {
313 jlong tmp = (jlong) f;
314 if (tmp != high_bit) {
315 return tmp;
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98 BasicType vt = (BasicType)i;
99 BasicType ft = type2field[vt];
100 switch (vt) {
101 // the following types might plausibly show up in memory layouts:
102 case T_BOOLEAN:
103 case T_BYTE:
104 case T_CHAR:
105 case T_SHORT:
106 case T_INT:
107 case T_FLOAT:
108 case T_DOUBLE:
109 case T_LONG:
110 case T_OBJECT:
111 case T_VALUETYPE:
112 case T_ADDRESS: // random raw pointer
113 case T_METADATA: // metadata pointer
114 case T_NARROWOOP: // compressed pointer
115 case T_NARROWKLASS: // compressed klass pointer
116 case T_CONFLICT: // might as well support a bottom type
117 case T_VOID: // padding or other unaddressed word
118 // layout type must map to itself
119 assert(vt == ft, "");
120 break;
121 default:
122 // non-layout type must map to a (different) layout type
123 assert(vt != ft, "");
124 assert(ft == type2field[ft], "");
125 }
126 // every type must map to same-sized layout type:
127 assert(type2size[vt] == type2size[ft], "");
128 }
129 }
130 // These are assumed, e.g., when filling HeapWords with juints.
131 assert(is_power_of_2(sizeof(juint)), "juint must be power of 2");
132 assert(is_power_of_2(HeapWordSize), "HeapWordSize must be power of 2");
133 assert((size_t)HeapWordSize >= sizeof(juint),
134 "HeapWord should be at least as large as juint");
135 assert(sizeof(NULL) == sizeof(char*), "NULL must be same size as pointer");
136 #endif
137
162 // Size info for oops within java objects is fixed
163 heapOopSize = jintSize;
164 LogBytesPerHeapOop = LogBytesPerInt;
165 LogBitsPerHeapOop = LogBitsPerInt;
166 BytesPerHeapOop = BytesPerInt;
167 BitsPerHeapOop = BitsPerInt;
168 } else {
169 heapOopSize = oopSize;
170 LogBytesPerHeapOop = LogBytesPerWord;
171 LogBitsPerHeapOop = LogBitsPerWord;
172 BytesPerHeapOop = BytesPerWord;
173 BitsPerHeapOop = BitsPerWord;
174 }
175 _type2aelembytes[T_OBJECT] = heapOopSize;
176 _type2aelembytes[T_ARRAY] = heapOopSize;
177 _type2aelembytes[T_VALUETYPE] = heapOopSize;
178 }
179
180
181 // Map BasicType to signature character
182 char type2char_tab[T_CONFLICT+1]={ 0, 0, 0, 0, 'Z', 'C', 'F', 'D', 'B', 'S', 'I', 'J', 'L', '[', 'Q', 'V', 0, 0, 0, 0, 0};
183
184 // Map BasicType to Java type name
185 const char* type2name_tab[T_CONFLICT+1] = {
186 NULL, NULL, NULL, NULL,
187 "boolean",
188 "char",
189 "float",
190 "double",
191 "byte",
192 "short",
193 "int",
194 "long",
195 "object",
196 "array",
197 "valuetype",
198 "void",
199 "*address*",
200 "*narrowoop*",
201 "*metadata*",
202 "*narrowklass*",
203 "*conflict*"
204 };
205
206
207 BasicType name2type(const char* name) {
208 for (int i = T_BOOLEAN; i <= T_VOID; i++) {
209 BasicType t = (BasicType)i;
210 if (type2name_tab[t] != NULL && 0 == strcmp(type2name_tab[t], name))
211 return t;
212 }
213 return T_ILLEGAL;
214 }
215
216 // Map BasicType to size in words
217 int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 0, 1, 1, 1, 1, -1};
218
219 BasicType type2field[T_CONFLICT+1] = {
220 (BasicType)0, // 0,
221 (BasicType)0, // 1,
222 (BasicType)0, // 2,
223 (BasicType)0, // 3,
224 T_BOOLEAN, // T_BOOLEAN = 4,
225 T_CHAR, // T_CHAR = 5,
226 T_FLOAT, // T_FLOAT = 6,
227 T_DOUBLE, // T_DOUBLE = 7,
228 T_BYTE, // T_BYTE = 8,
229 T_SHORT, // T_SHORT = 9,
230 T_INT, // T_INT = 10,
231 T_LONG, // T_LONG = 11,
232 T_OBJECT, // T_OBJECT = 12,
233 T_OBJECT, // T_ARRAY = 13,
234 T_VALUETYPE, // T_VALUETYPE = 14,
235 T_VOID, // T_VOID = 15,
236 T_ADDRESS, // T_ADDRESS = 16,
237 T_NARROWOOP, // T_NARROWOOP= 17,
238 T_METADATA, // T_METADATA = 18,
239 T_NARROWKLASS, // T_NARROWKLASS = 19,
240 T_CONFLICT // T_CONFLICT = 20
241 };
242
243
244 BasicType type2wfield[T_CONFLICT+1] = {
245 (BasicType)0, // 0,
246 (BasicType)0, // 1,
247 (BasicType)0, // 2,
248 (BasicType)0, // 3,
249 T_INT, // T_BOOLEAN = 4,
250 T_INT, // T_CHAR = 5,
251 T_FLOAT, // T_FLOAT = 6,
252 T_DOUBLE, // T_DOUBLE = 7,
253 T_INT, // T_BYTE = 8,
254 T_INT, // T_SHORT = 9,
255 T_INT, // T_INT = 10,
256 T_LONG, // T_LONG = 11,
257 T_OBJECT, // T_OBJECT = 12,
258 T_OBJECT, // T_ARRAY = 13,
259 T_VALUETYPE, // T_VALUETYPE = 14,
260 T_VOID, // T_VOID = 15,
261 T_ADDRESS, // T_ADDRESS = 16,
262 T_NARROWOOP, // T_NARROWOOP = 17,
263 T_METADATA, // T_METADATA = 18,
264 T_NARROWKLASS, // T_NARROWKLASS = 19,
265 T_CONFLICT // T_CONFLICT = 20
266 };
267
268
269 int _type2aelembytes[T_CONFLICT+1] = {
270 0, // 0
271 0, // 1
272 0, // 2
273 0, // 3
274 T_BOOLEAN_aelem_bytes, // T_BOOLEAN = 4,
275 T_CHAR_aelem_bytes, // T_CHAR = 5,
276 T_FLOAT_aelem_bytes, // T_FLOAT = 6,
277 T_DOUBLE_aelem_bytes, // T_DOUBLE = 7,
278 T_BYTE_aelem_bytes, // T_BYTE = 8,
279 T_SHORT_aelem_bytes, // T_SHORT = 9,
280 T_INT_aelem_bytes, // T_INT = 10,
281 T_LONG_aelem_bytes, // T_LONG = 11,
282 T_OBJECT_aelem_bytes, // T_OBJECT = 12,
283 T_ARRAY_aelem_bytes, // T_ARRAY = 13,
284 T_VALUETYPE_aelem_bytes, // T_VALUETYPE = 14,
285 0, // T_VOID = 15,
286 T_OBJECT_aelem_bytes, // T_ADDRESS = 16,
287 T_NARROWOOP_aelem_bytes, // T_NARROWOOP= 17,
288 T_OBJECT_aelem_bytes, // T_METADATA = 18,
289 T_NARROWKLASS_aelem_bytes, // T_NARROWKLASS= 19,
290 0 // T_CONFLICT = 20
291 };
292
293 #ifdef ASSERT
294 int type2aelembytes(BasicType t, bool allow_address) {
295 assert(allow_address || t != T_ADDRESS, " ");
296 return _type2aelembytes[t];
297 }
298 #endif
299
300 // Support for 64-bit integer arithmetic
301
302 // The following code is mostly taken from JVM typedefs_md.h and system_md.c
303
304 static const jlong high_bit = (jlong)1 << (jlong)63;
305 static const jlong other_bits = ~high_bit;
306
307 jlong float2long(jfloat f) {
308 jlong tmp = (jlong) f;
309 if (tmp != high_bit) {
310 return tmp;
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