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comparison src/os/solaris/dtrace/libjvm_db.c @ 113:ba764ed4b6f2

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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
author coleenp
date Sun, 13 Apr 2008 17:43:42 -0400
parents a61af66fc99e
children d1605aabd0a1
comparison
equal deleted inserted replaced
110:a49a647afe9a 113:ba764ed4b6f2
146 uint64_t BufferBlob_vtbl; 146 uint64_t BufferBlob_vtbl;
147 uint64_t RuntimeStub_vtbl; 147 uint64_t RuntimeStub_vtbl;
148 148
149 uint64_t Universe_methodKlassObj_address; 149 uint64_t Universe_methodKlassObj_address;
150 uint64_t CodeCache_heap_address; 150 uint64_t CodeCache_heap_address;
151 uint64_t Universe_heap_base_address;
151 152
152 /* Volatiles */ 153 /* Volatiles */
153 uint64_t Universe_methodKlassObj; 154 uint64_t Universe_methodKlassObj;
155 uint64_t Universe_heap_base;
154 uint64_t CodeCache_low; 156 uint64_t CodeCache_low;
155 uint64_t CodeCache_high; 157 uint64_t CodeCache_high;
156 uint64_t CodeCache_segmap_low; 158 uint64_t CodeCache_segmap_low;
157 uint64_t CodeCache_segmap_high; 159 uint64_t CodeCache_segmap_high;
158 160
163 165
164 Nmethod_t *N; /*Inlined methods support */ 166 Nmethod_t *N; /*Inlined methods support */
165 Frame_t prev_fr; 167 Frame_t prev_fr;
166 Frame_t curr_fr; 168 Frame_t curr_fr;
167 }; 169 };
168
169 170
170 static int 171 static int
171 read_string(struct ps_prochandle *P, 172 read_string(struct ps_prochandle *P,
172 char *buf, /* caller's buffer */ 173 char *buf, /* caller's buffer */
173 size_t size, /* upper limit on bytes to read */ 174 size_t size, /* upper limit on bytes to read */
183 buf += 1; 184 buf += 1;
184 } 185 }
185 return -1; 186 return -1;
186 } 187 }
187 188
189 static int read_compressed_pointer(jvm_agent_t* J, uint64_t base, uint32_t *ptr) {
190 int err = -1;
191 uint32_t ptr32;
192 err = ps_pread(J->P, base, &ptr32, sizeof(uint32_t));
193 *ptr = ptr32;
194 return err;
195 }
196
188 static int read_pointer(jvm_agent_t* J, uint64_t base, uint64_t* ptr) { 197 static int read_pointer(jvm_agent_t* J, uint64_t base, uint64_t* ptr) {
189 int err = -1; 198 int err = -1;
190 uint32_t ptr32; 199 uint32_t ptr32;
191 200
192 switch (DATA_MODEL) { 201 switch (DATA_MODEL) {
268 } 277 }
269 } else if (vmp->typeName[0] == 'U' && strcmp("Universe", vmp->typeName) == 0) { 278 } else if (vmp->typeName[0] == 'U' && strcmp("Universe", vmp->typeName) == 0) {
270 if (strcmp("_methodKlassObj", vmp->fieldName) == 0) { 279 if (strcmp("_methodKlassObj", vmp->fieldName) == 0) {
271 J->Universe_methodKlassObj_address = vmp->address; 280 J->Universe_methodKlassObj_address = vmp->address;
272 } 281 }
282 if (strcmp("_heap_base", vmp->fieldName) == 0) {
283 J->Universe_heap_base_address = vmp->address;
284 }
273 } 285 }
274 CHECK_FAIL(err); 286 CHECK_FAIL(err);
275 287
276 base += SIZE_VMStructEntry; 288 base += SIZE_VMStructEntry;
277 if (vmp->typeName != NULL) free((void*)vmp->typeName); 289 if (vmp->typeName != NULL) free((void*)vmp->typeName);
289 static int read_volatiles(jvm_agent_t* J) { 301 static int read_volatiles(jvm_agent_t* J) {
290 uint64_t ptr; 302 uint64_t ptr;
291 int err; 303 int err;
292 304
293 err = read_pointer(J, J->Universe_methodKlassObj_address, &J->Universe_methodKlassObj); 305 err = read_pointer(J, J->Universe_methodKlassObj_address, &J->Universe_methodKlassObj);
306 CHECK_FAIL(err);
307 err = read_pointer(J, J->Universe_heap_base_address, &J->Universe_heap_base);
294 CHECK_FAIL(err); 308 CHECK_FAIL(err);
295 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory + 309 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory +
296 OFFSET_VirtualSpace_low, &J->CodeCache_low); 310 OFFSET_VirtualSpace_low, &J->CodeCache_low);
297 CHECK_FAIL(err); 311 CHECK_FAIL(err);
298 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory + 312 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory +
442 } 456 }
443 457
444 static int is_methodOop(jvm_agent_t* J, uint64_t methodOopPtr) { 458 static int is_methodOop(jvm_agent_t* J, uint64_t methodOopPtr) {
445 uint64_t klass; 459 uint64_t klass;
446 int err; 460 int err;
447 err = read_pointer(J, methodOopPtr + OFFSET_oopDesc_klass, &klass); 461 // If heap_base is nonnull, this was a compressed oop.
462 if (J->Universe_heap_base != NULL) {
463 uint32_t cklass;
464 err = read_compressed_pointer(J, methodOopPtr + OFFSET_oopDesc_metadata,
465 &cklass);
466 // decode heap oop, same as oop.inline.hpp
467 klass = (uint64_t)((uintptr_t)J->Universe_heap_base +
468 ((uintptr_t)cklass << 3));
469 } else {
470 err = read_pointer(J, methodOopPtr + OFFSET_oopDesc_metadata, &klass);
471 }
448 if (err != PS_OK) goto fail; 472 if (err != PS_OK) goto fail;
449 return klass == J->Universe_methodKlassObj; 473 return klass == J->Universe_methodKlassObj;
450 474
451 fail: 475 fail:
452 return 0; 476 return 0;