Mercurial > hg > truffle
annotate src/os/bsd/dtrace/libjvm_db.c @ 20234:fd94cbe7c5da
8049684: pstack crashes on java core dump
Reviewed-by: sundar, sspitsyn
| author | kevinw |
|---|---|
| date | Mon, 21 Jul 2014 10:40:50 +0100 |
| parents | da91efe96a93 |
| children |
| rev | line source |
|---|---|
| 4006 | 1 /* |
|
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2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
| 4006 | 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 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include <stdio.h> | |
| 26 #include <stdlib.h> | |
| 27 #include <string.h> | |
| 28 #include <errno.h> | |
| 29 // not available on macosx #include <gelf.h> | |
| 30 | |
| 31 #include "libjvm_db.h" | |
| 32 #include "JvmOffsets.h" | |
| 33 | |
| 34 #define LIBJVM_SO "libjvm.so" | |
| 35 | |
| 36 #if defined(i386) || defined(__i386) || defined(__amd64) | |
| 37 #ifdef COMPILER2 | |
| 38 #define X86_COMPILER2 | |
| 39 #endif /* COMPILER2 */ | |
| 40 #endif /* i386 */ | |
| 41 | |
| 42 typedef struct { | |
| 43 short vf_cnt; /* number of recognized java vframes */ | |
| 44 short bci; /* current frame method byte code index */ | |
| 45 int line; /* current frame method source line */ | |
| 46 uint64_t new_fp; /* fp for the next frame */ | |
| 47 uint64_t new_pc; /* pc for the next frame */ | |
| 48 uint64_t new_sp; /* "raw" sp for the next frame (includes extension by interpreter/adapter */ | |
| 49 char locinf; /* indicates there is valid location info */ | |
| 50 } Jframe_t; | |
| 51 | |
| 52 int Jlookup_by_regs(jvm_agent_t* J, const prgregset_t regs, char *name, | |
| 53 size_t size, Jframe_t *jframe); | |
| 54 | |
| 55 int main(int arg) { return arg; } | |
| 56 | |
| 57 static int debug = 0; | |
| 58 | |
| 59 static void failed(int err, const char * file, int line) { | |
| 60 if (debug) { | |
| 61 fprintf(stderr, "failed %d at %s:%d\n", err, file, line); | |
| 62 } | |
| 63 } | |
| 64 | |
| 65 static void warn(const char * file, int line, const char * msg) { | |
| 66 if (debug) { | |
| 67 fprintf(stderr, "warning: %s at %s:%d\n", msg, file, line); | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 static void warn1(const char * file, int line, const char * msg, intptr_t arg1) { | |
| 72 if (debug) { | |
| 73 fprintf(stderr, "warning: "); | |
| 74 fprintf(stderr, msg, arg1); | |
| 75 fprintf(stderr, " at %s:%d\n", file, line); | |
| 76 } | |
| 77 } | |
| 78 | |
| 79 #define CHECK_FAIL(err) \ | |
| 80 if (err != PS_OK) { failed(err, __FILE__, __LINE__); goto fail; } | |
| 81 #define WARN(msg) warn(__FILE__, __LINE__, msg) | |
| 82 #define WARN1(msg, arg1) warn1(__FILE__, __LINE__, msg, arg1) | |
| 83 | |
| 84 typedef struct VMStructEntry { | |
| 85 const char * typeName; /* The type name containing the given field (example: "Klass") */ | |
| 86 const char * fieldName; /* The field name within the type (example: "_name") */ | |
| 87 uint64_t address; /* Address of field; only used for static fields */ | |
| 88 /* ("offset" can not be reused because of apparent SparcWorks compiler bug */ | |
| 89 /* in generation of initializer data) */ | |
| 90 } VMStructEntry; | |
| 91 | |
| 92 /* Prototyping inlined methods */ | |
| 93 | |
| 94 int sprintf(char *s, const char *format, ...); | |
| 95 | |
| 96 #define SZ16 sizeof(int16_t) | |
| 97 #define SZ32 sizeof(int32_t) | |
| 98 | |
| 99 #define COMP_METHOD_SIGN '*' | |
| 100 | |
| 101 #define MAX_VFRAMES_CNT 256 | |
| 102 | |
| 103 typedef struct vframe { | |
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104 uint64_t method; |
| 4006 | 105 int32_t sender_decode_offset; |
| 106 int32_t methodIdx; | |
| 107 int32_t bci; | |
| 108 int32_t line; | |
| 109 } Vframe_t; | |
| 110 | |
| 111 typedef struct frame { | |
| 112 uintptr_t fp; | |
| 113 uintptr_t pc; | |
| 114 uintptr_t sp; | |
| 115 uintptr_t sender_sp; // The unextended sp of the caller | |
| 116 } Frame_t; | |
| 117 | |
| 118 typedef struct Nmethod_t { | |
| 119 struct jvm_agent* J; | |
| 120 Jframe_t *jframe; | |
| 121 | |
| 122 uint64_t nm; /* _nmethod */ | |
| 123 uint64_t pc; | |
| 124 uint64_t pc_desc; | |
| 125 | |
| 126 int32_t orig_pc_offset; /* _orig_pc_offset */ | |
| 127 int32_t instrs_beg; /* _code_offset */ | |
| 128 int32_t instrs_end; | |
| 129 int32_t deopt_beg; /* _deoptimize_offset */ | |
| 130 int32_t scopes_data_beg; /* _scopes_data_offset */ | |
| 131 int32_t scopes_data_end; | |
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132 int32_t metadata_beg; /* _metadata_offset */ |
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133 int32_t metadata_end; |
| 4006 | 134 int32_t scopes_pcs_beg; /* _scopes_pcs_offset */ |
| 135 int32_t scopes_pcs_end; | |
| 136 | |
| 137 int vf_cnt; | |
| 138 Vframe_t vframes[MAX_VFRAMES_CNT]; | |
| 139 } Nmethod_t; | |
| 140 | |
| 141 struct jvm_agent { | |
| 142 struct ps_prochandle* P; | |
| 143 | |
| 144 uint64_t nmethod_vtbl; | |
| 145 uint64_t CodeBlob_vtbl; | |
| 146 uint64_t BufferBlob_vtbl; | |
| 147 uint64_t RuntimeStub_vtbl; | |
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148 uint64_t Method_vtbl; |
| 4006 | 149 |
| 150 uint64_t Use_Compressed_Oops_address; | |
| 151 uint64_t Universe_narrow_oop_base_address; | |
| 152 uint64_t Universe_narrow_oop_shift_address; | |
| 153 uint64_t CodeCache_heap_address; | |
| 154 | |
| 155 /* Volatiles */ | |
| 156 uint8_t Use_Compressed_Oops; | |
| 157 uint64_t Universe_narrow_oop_base; | |
| 158 uint32_t Universe_narrow_oop_shift; | |
| 159 uint64_t CodeCache_low; | |
| 160 uint64_t CodeCache_high; | |
| 161 uint64_t CodeCache_segmap_low; | |
| 162 uint64_t CodeCache_segmap_high; | |
| 163 | |
| 164 int32_t SIZE_CodeCache_log2_segment; | |
| 165 | |
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166 uint64_t methodPtr; |
| 4006 | 167 uint64_t bcx; |
| 168 | |
| 169 Nmethod_t *N; /*Inlined methods support */ | |
| 170 Frame_t prev_fr; | |
| 171 Frame_t curr_fr; | |
| 172 }; | |
| 173 | |
| 174 static int | |
| 175 read_string(struct ps_prochandle *P, | |
| 176 char *buf, /* caller's buffer */ | |
| 177 size_t size, /* upper limit on bytes to read */ | |
| 178 uintptr_t addr) /* address in process */ | |
| 179 { | |
| 180 int err = PS_OK; | |
| 181 while (size-- > 1 && err == PS_OK) { | |
| 182 err = ps_pread(P, addr, buf, 1); | |
| 183 if (*buf == '\0') { | |
| 184 return PS_OK; | |
| 185 } | |
| 186 addr += 1; | |
| 187 buf += 1; | |
| 188 } | |
| 189 return -1; | |
| 190 } | |
| 191 | |
| 192 static int read_compressed_pointer(jvm_agent_t* J, uint64_t base, uint32_t *ptr) { | |
| 193 int err = -1; | |
| 194 uint32_t ptr32; | |
| 195 err = ps_pread(J->P, base, &ptr32, sizeof(uint32_t)); | |
| 196 *ptr = ptr32; | |
| 197 return err; | |
| 198 } | |
| 199 | |
| 200 static int read_pointer(jvm_agent_t* J, uint64_t base, uint64_t* ptr) { | |
| 201 int err = -1; | |
| 202 uint32_t ptr32; | |
| 203 | |
| 204 switch (DATA_MODEL) { | |
| 205 case PR_MODEL_LP64: | |
| 206 err = ps_pread(J->P, base, ptr, sizeof(uint64_t)); | |
| 207 break; | |
| 208 case PR_MODEL_ILP32: | |
| 209 err = ps_pread(J->P, base, &ptr32, sizeof(uint32_t)); | |
| 210 *ptr = ptr32; | |
| 211 break; | |
| 212 } | |
| 213 | |
| 214 return err; | |
| 215 } | |
| 216 | |
| 217 static int read_string_pointer(jvm_agent_t* J, uint64_t base, const char ** stringp) { | |
| 218 uint64_t ptr; | |
| 219 int err; | |
| 220 char buffer[1024]; | |
| 221 | |
| 222 *stringp = NULL; | |
| 223 err = read_pointer(J, base, &ptr); | |
| 224 CHECK_FAIL(err); | |
| 225 if (ptr != 0) { | |
| 226 err = read_string(J->P, buffer, sizeof(buffer), ptr); | |
| 227 CHECK_FAIL(err); | |
| 228 *stringp = strdup(buffer); | |
| 229 } | |
| 230 return PS_OK; | |
| 231 | |
| 232 fail: | |
| 233 return err; | |
| 234 } | |
| 235 | |
| 236 static int parse_vmstruct_entry(jvm_agent_t* J, uint64_t base, VMStructEntry* vmp) { | |
| 237 uint64_t ptr; | |
| 238 int err; | |
| 239 | |
| 240 err = read_string_pointer(J, base + OFFSET_VMStructEntrytypeName, &vmp->typeName); | |
| 241 CHECK_FAIL(err); | |
| 242 err = read_string_pointer(J, base + OFFSET_VMStructEntryfieldName, &vmp->fieldName); | |
| 243 CHECK_FAIL(err); | |
| 244 err = read_pointer(J, base + OFFSET_VMStructEntryaddress, &vmp->address); | |
| 245 CHECK_FAIL(err); | |
| 246 | |
| 247 return PS_OK; | |
| 248 | |
| 249 fail: | |
| 250 if (vmp->typeName != NULL) free((void*)vmp->typeName); | |
| 251 if (vmp->fieldName != NULL) free((void*)vmp->fieldName); | |
| 252 return err; | |
| 253 } | |
| 254 | |
| 255 static int parse_vmstructs(jvm_agent_t* J) { | |
| 256 VMStructEntry vmVar; | |
| 257 VMStructEntry* vmp = &vmVar; | |
| 258 uint64_t gHotSpotVMStructs; | |
| 259 psaddr_t sym_addr; | |
| 260 uint64_t base; | |
| 261 int err; | |
| 262 | |
| 20234 | 263 /* Clear *vmp now in case we jump to fail: */ |
| 264 memset(vmp, 0, sizeof(VMStructEntry)); | |
| 265 | |
| 4006 | 266 err = ps_pglobal_lookup(J->P, LIBJVM_SO, "gHotSpotVMStructs", &sym_addr); |
| 267 CHECK_FAIL(err); | |
| 268 err = read_pointer(J, sym_addr, &gHotSpotVMStructs); | |
| 269 CHECK_FAIL(err); | |
| 270 base = gHotSpotVMStructs; | |
| 271 | |
| 272 err = PS_OK; | |
| 273 while (err == PS_OK) { | |
| 274 memset(vmp, 0, sizeof(VMStructEntry)); | |
| 275 err = parse_vmstruct_entry(J, base, vmp); | |
| 276 if (err != PS_OK || vmp->typeName == NULL) { | |
| 277 break; | |
| 278 } | |
| 279 | |
| 280 if (vmp->typeName[0] == 'C' && strcmp("CodeCache", vmp->typeName) == 0) { | |
| 281 if (strcmp("_heap", vmp->fieldName) == 0) { | |
| 282 err = read_pointer(J, vmp->address, &J->CodeCache_heap_address); | |
| 283 } | |
| 284 } else if (vmp->typeName[0] == 'U' && strcmp("Universe", vmp->typeName) == 0) { | |
| 285 if (strcmp("_narrow_oop._base", vmp->fieldName) == 0) { | |
| 286 J->Universe_narrow_oop_base_address = vmp->address; | |
| 287 } | |
| 288 if (strcmp("_narrow_oop._shift", vmp->fieldName) == 0) { | |
| 289 J->Universe_narrow_oop_shift_address = vmp->address; | |
| 290 } | |
| 291 } | |
| 292 CHECK_FAIL(err); | |
| 293 | |
| 294 base += SIZE_VMStructEntry; | |
| 295 if (vmp->typeName != NULL) free((void*)vmp->typeName); | |
| 296 if (vmp->fieldName != NULL) free((void*)vmp->fieldName); | |
| 297 } | |
| 298 | |
| 299 return PS_OK; | |
| 300 | |
| 301 fail: | |
| 302 if (vmp->typeName != NULL) free((void*)vmp->typeName); | |
| 303 if (vmp->fieldName != NULL) free((void*)vmp->fieldName); | |
| 304 return -1; | |
| 305 } | |
| 306 | |
| 307 static int find_symbol(jvm_agent_t* J, const char *name, uint64_t* valuep) { | |
| 308 psaddr_t sym_addr; | |
| 309 int err; | |
| 310 | |
| 311 err = ps_pglobal_lookup(J->P, LIBJVM_SO, name, &sym_addr); | |
| 312 if (err != PS_OK) goto fail; | |
| 313 *valuep = sym_addr; | |
| 314 return PS_OK; | |
| 315 | |
| 316 fail: | |
| 317 return err; | |
| 318 } | |
| 319 | |
| 320 static int read_volatiles(jvm_agent_t* J) { | |
| 321 uint64_t ptr; | |
| 322 int err; | |
| 323 | |
| 324 err = find_symbol(J, "UseCompressedOops", &J->Use_Compressed_Oops_address); | |
| 325 if (err == PS_OK) { | |
| 326 err = ps_pread(J->P, J->Use_Compressed_Oops_address, &J->Use_Compressed_Oops, sizeof(uint8_t)); | |
| 327 CHECK_FAIL(err); | |
| 328 } else { | |
| 329 J->Use_Compressed_Oops = 0; | |
| 330 } | |
| 331 | |
| 332 err = read_pointer(J, J->Universe_narrow_oop_base_address, &J->Universe_narrow_oop_base); | |
| 333 CHECK_FAIL(err); | |
| 334 err = ps_pread(J->P, J->Universe_narrow_oop_shift_address, &J->Universe_narrow_oop_shift, sizeof(uint32_t)); | |
| 335 CHECK_FAIL(err); | |
| 336 | |
| 337 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory + | |
| 338 OFFSET_VirtualSpace_low, &J->CodeCache_low); | |
| 339 CHECK_FAIL(err); | |
| 340 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory + | |
| 341 OFFSET_VirtualSpace_high, &J->CodeCache_high); | |
| 342 CHECK_FAIL(err); | |
| 343 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_segmap + | |
| 344 OFFSET_VirtualSpace_low, &J->CodeCache_segmap_low); | |
| 345 CHECK_FAIL(err); | |
| 346 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_segmap + | |
| 347 OFFSET_VirtualSpace_high, &J->CodeCache_segmap_high); | |
| 348 CHECK_FAIL(err); | |
| 349 | |
| 350 err = ps_pread(J->P, J->CodeCache_heap_address + OFFSET_CodeHeap_log2_segment_size, | |
| 351 &J->SIZE_CodeCache_log2_segment, sizeof(J->SIZE_CodeCache_log2_segment)); | |
| 352 CHECK_FAIL(err); | |
| 353 | |
| 354 return PS_OK; | |
| 355 | |
| 356 fail: | |
| 357 return err; | |
| 358 } | |
| 359 | |
| 360 | |
| 361 static int codecache_contains(jvm_agent_t* J, uint64_t ptr) { | |
| 362 /* make sure the code cache is up to date */ | |
| 363 return (J->CodeCache_low <= ptr && ptr < J->CodeCache_high); | |
| 364 } | |
| 365 | |
| 366 static uint64_t segment_for(jvm_agent_t* J, uint64_t p) { | |
| 367 return (p - J->CodeCache_low) >> J->SIZE_CodeCache_log2_segment; | |
| 368 } | |
| 369 | |
| 370 static uint64_t block_at(jvm_agent_t* J, int i) { | |
| 371 return J->CodeCache_low + (i << J->SIZE_CodeCache_log2_segment); | |
| 372 } | |
| 373 | |
| 374 static int find_start(jvm_agent_t* J, uint64_t ptr, uint64_t *startp) { | |
| 375 int err; | |
| 376 | |
| 377 *startp = 0; | |
| 378 if (J->CodeCache_low <= ptr && ptr < J->CodeCache_high) { | |
| 379 int32_t used; | |
| 380 uint64_t segment = segment_for(J, ptr); | |
| 381 uint64_t block = J->CodeCache_segmap_low; | |
| 382 uint8_t tag; | |
| 383 err = ps_pread(J->P, block + segment, &tag, sizeof(tag)); | |
| 384 CHECK_FAIL(err); | |
| 385 if (tag == 0xff) | |
| 386 return PS_OK; | |
| 387 while (tag > 0) { | |
| 388 err = ps_pread(J->P, block + segment, &tag, sizeof(tag)); | |
| 389 CHECK_FAIL(err); | |
| 390 segment -= tag; | |
| 391 } | |
| 392 block = block_at(J, segment); | |
| 393 err = ps_pread(J->P, block + OFFSET_HeapBlockHeader_used, &used, sizeof(used)); | |
| 394 CHECK_FAIL(err); | |
| 395 if (used) { | |
| 396 *startp = block + SIZE_HeapBlockHeader; | |
| 397 } | |
| 398 } | |
| 399 return PS_OK; | |
| 400 | |
| 401 fail: | |
| 402 return -1; | |
| 403 } | |
| 404 | |
| 405 static int find_jlong_constant(jvm_agent_t* J, const char *name, uint64_t* valuep) { | |
| 406 psaddr_t sym_addr; | |
| 407 int err = ps_pglobal_lookup(J->P, LIBJVM_SO, name, &sym_addr); | |
| 408 if (err == PS_OK) { | |
| 409 err = ps_pread(J->P, sym_addr, valuep, sizeof(uint64_t)); | |
| 410 return err; | |
| 411 } | |
| 412 *valuep = -1; | |
| 413 return -1; | |
| 414 } | |
| 415 | |
| 416 jvm_agent_t *Jagent_create(struct ps_prochandle *P, int vers) { | |
| 417 jvm_agent_t* J; | |
| 418 int err; | |
| 419 | |
| 420 if (vers != JVM_DB_VERSION) { | |
| 421 errno = ENOTSUP; | |
| 422 return NULL; | |
| 423 } | |
| 424 | |
| 425 J = (jvm_agent_t*)calloc(sizeof(struct jvm_agent), 1); | |
| 426 | |
| 427 debug = getenv("LIBJVMDB_DEBUG") != NULL; | |
| 428 if (debug) debug = 3; | |
| 429 | |
| 430 if (debug) { | |
| 431 fprintf(stderr, "Jagent_create: debug=%d\n", debug); | |
| 432 #ifdef X86_COMPILER2 | |
| 433 fprintf(stderr, "Jagent_create: R_SP=%d, R_FP=%d, POINTER_SIZE=%d\n", R_SP, R_FP, POINTER_SIZE); | |
| 434 #endif /* X86_COMPILER2 */ | |
| 435 } | |
| 436 | |
| 437 J->P = P; | |
| 438 | |
| 439 // Initialize the initial previous frame | |
| 440 | |
| 441 J->prev_fr.fp = 0; | |
| 442 J->prev_fr.pc = 0; | |
| 443 J->prev_fr.sp = 0; | |
| 444 J->prev_fr.sender_sp = 0; | |
| 445 | |
| 446 err = find_symbol(J, "__1cHnmethodG__vtbl_", &J->nmethod_vtbl); | |
| 447 CHECK_FAIL(err); | |
| 448 err = find_symbol(J, "__1cKBufferBlobG__vtbl_", &J->BufferBlob_vtbl); | |
| 449 if (err != PS_OK) J->BufferBlob_vtbl = 0; | |
| 450 err = find_symbol(J, "__1cICodeBlobG__vtbl_", &J->CodeBlob_vtbl); | |
| 451 CHECK_FAIL(err); | |
| 452 err = find_symbol(J, "__1cLRuntimeStubG__vtbl_", &J->RuntimeStub_vtbl); | |
| 453 CHECK_FAIL(err); | |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
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454 err = find_symbol(J, "__1cNMethodG__vtbl_", &J->Method_vtbl); |
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changeset
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455 CHECK_FAIL(err); |
| 4006 | 456 |
| 457 err = parse_vmstructs(J); | |
| 458 CHECK_FAIL(err); | |
| 459 err = read_volatiles(J); | |
| 460 CHECK_FAIL(err); | |
| 461 | |
| 462 return J; | |
| 463 | |
| 464 fail: | |
| 465 Jagent_destroy(J); | |
| 466 return NULL; | |
| 467 } | |
| 468 | |
| 469 void Jagent_destroy(jvm_agent_t *J) { | |
| 470 if (J != NULL) { | |
| 471 free(J); | |
| 472 } | |
| 473 } | |
| 474 | |
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diff
changeset
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475 static int is_method(jvm_agent_t* J, uint64_t methodPtr) { |
| 4006 | 476 uint64_t klass; |
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changeset
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477 int err = read_pointer(J, methodPtr, &klass); |
| 4006 | 478 if (err != PS_OK) goto fail; |
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parents:
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diff
changeset
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479 return klass == J->Method_vtbl; |
| 4006 | 480 |
| 481 fail: | |
| 482 return 0; | |
| 483 } | |
| 484 | |
| 485 static int | |
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6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
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486 name_for_methodPtr(jvm_agent_t* J, uint64_t methodPtr, char * result, size_t size) |
| 4006 | 487 { |
| 488 short nameIndex; | |
| 489 short signatureIndex; | |
| 490 uint64_t constantPool; | |
| 491 uint64_t constMethod; | |
| 492 uint64_t nameSymbol; | |
| 493 uint64_t signatureSymbol; | |
| 494 uint64_t klassPtr; | |
| 495 uint64_t klassSymbol; | |
| 496 short klassSymbolLength; | |
| 497 short nameSymbolLength; | |
| 498 short signatureSymbolLength; | |
| 499 char * nameString = NULL; | |
| 500 char * klassString = NULL; | |
| 501 char * signatureString = NULL; | |
| 502 int err; | |
| 503 | |
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504 err = read_pointer(J, methodPtr + OFFSET_Method_constMethod, &constMethod); |
| 4006 | 505 CHECK_FAIL(err); |
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506 err = read_pointer(J, constMethod + OFFSET_ConstMethod_constants, &constantPool); |
| 4006 | 507 CHECK_FAIL(err); |
| 508 | |
| 509 /* To get name string */ | |
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510 err = ps_pread(J->P, constMethod + OFFSET_ConstMethod_name_index, &nameIndex, 2); |
| 4006 | 511 CHECK_FAIL(err); |
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512 err = read_pointer(J, constantPool + nameIndex * POINTER_SIZE + SIZE_ConstantPool, &nameSymbol); |
| 4006 | 513 CHECK_FAIL(err); |
| 514 // The symbol is a CPSlot and has lower bit set to indicate metadata | |
| 515 nameSymbol &= (~1); // remove metadata lsb | |
| 516 err = ps_pread(J->P, nameSymbol + OFFSET_Symbol_length, &nameSymbolLength, 2); | |
| 517 CHECK_FAIL(err); | |
| 518 nameString = (char*)calloc(nameSymbolLength + 1, 1); | |
| 519 err = ps_pread(J->P, nameSymbol + OFFSET_Symbol_body, nameString, nameSymbolLength); | |
| 520 CHECK_FAIL(err); | |
| 521 | |
| 522 /* To get signature string */ | |
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523 err = ps_pread(J->P, constMethod + OFFSET_ConstMethod_signature_index, &signatureIndex, 2); |
| 4006 | 524 CHECK_FAIL(err); |
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525 err = read_pointer(J, constantPool + signatureIndex * POINTER_SIZE + SIZE_ConstantPool, &signatureSymbol); |
| 4006 | 526 CHECK_FAIL(err); |
| 527 signatureSymbol &= (~1); // remove metadata lsb | |
| 528 err = ps_pread(J->P, signatureSymbol + OFFSET_Symbol_length, &signatureSymbolLength, 2); | |
| 529 CHECK_FAIL(err); | |
| 530 signatureString = (char*)calloc(signatureSymbolLength + 1, 1); | |
| 531 err = ps_pread(J->P, signatureSymbol + OFFSET_Symbol_body, signatureString, signatureSymbolLength); | |
| 532 CHECK_FAIL(err); | |
| 533 | |
| 534 /* To get klass string */ | |
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535 err = read_pointer(J, constantPool + OFFSET_ConstantPool_pool_holder, &klassPtr); |
| 4006 | 536 CHECK_FAIL(err); |
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537 err = read_pointer(J, klassPtr + OFFSET_Klass_name, &klassSymbol); |
| 4006 | 538 CHECK_FAIL(err); |
| 539 err = ps_pread(J->P, klassSymbol + OFFSET_Symbol_length, &klassSymbolLength, 2); | |
| 540 CHECK_FAIL(err); | |
| 541 klassString = (char*)calloc(klassSymbolLength + 1, 1); | |
| 542 err = ps_pread(J->P, klassSymbol + OFFSET_Symbol_body, klassString, klassSymbolLength); | |
| 543 CHECK_FAIL(err); | |
| 544 | |
| 545 result[0] = '\0'; | |
| 546 strncat(result, klassString, size); | |
| 547 size -= strlen(klassString); | |
| 548 strncat(result, ".", size); | |
| 549 size -= 1; | |
| 550 strncat(result, nameString, size); | |
| 551 size -= strlen(nameString); | |
| 552 strncat(result, signatureString, size); | |
| 553 | |
| 554 if (nameString != NULL) free(nameString); | |
| 555 if (klassString != NULL) free(klassString); | |
| 556 if (signatureString != NULL) free(signatureString); | |
| 557 | |
| 558 return PS_OK; | |
| 559 | |
| 560 fail: | |
| 561 if (debug) { | |
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562 fprintf(stderr, "name_for_methodPtr: FAIL \n\n"); |
| 4006 | 563 } |
| 564 if (nameString != NULL) free(nameString); | |
| 565 if (klassString != NULL) free(klassString); | |
| 566 if (signatureString != NULL) free(signatureString); | |
| 567 return -1; | |
| 568 } | |
| 569 | |
| 570 static int nmethod_info(Nmethod_t *N) | |
| 571 { | |
| 572 jvm_agent_t *J = N->J; | |
| 573 uint64_t nm = N->nm; | |
| 574 int32_t err; | |
| 575 | |
| 576 if (debug > 2 ) | |
| 577 fprintf(stderr, "\t nmethod_info: BEGIN \n"); | |
| 578 | |
| 579 /* Instructions */ | |
| 580 err = ps_pread(J->P, nm + OFFSET_CodeBlob_code_offset, &N->instrs_beg, SZ32); | |
| 581 CHECK_FAIL(err); | |
| 582 err = ps_pread(J->P, nm + OFFSET_CodeBlob_data_offset, &N->instrs_end, SZ32); | |
| 583 CHECK_FAIL(err); | |
| 584 err = ps_pread(J->P, nm + OFFSET_nmethod_deoptimize_offset, &N->deopt_beg, SZ32); | |
| 585 CHECK_FAIL(err); | |
| 586 err = ps_pread(J->P, nm + OFFSET_nmethod_orig_pc_offset, &N->orig_pc_offset, SZ32); | |
| 587 CHECK_FAIL(err); | |
| 588 | |
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589 /* Metadata */ |
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590 err = ps_pread(J->P, nm + OFFSET_nmethod_metadata_offset, &N->metadata_beg, SZ32); |
| 4006 | 591 CHECK_FAIL(err); |
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592 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_data_offset, &N->metadata_end, SZ32); |
| 4006 | 593 CHECK_FAIL(err); |
| 594 | |
| 595 /* scopes_pcs */ | |
| 596 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_pcs_offset, &N->scopes_pcs_beg, SZ32); | |
| 597 CHECK_FAIL(err); | |
| 598 err = ps_pread(J->P, nm + OFFSET_nmethod_handler_table_offset, &N->scopes_pcs_end, SZ32); | |
| 599 CHECK_FAIL(err); | |
| 600 | |
| 601 /* scopes_data */ | |
| 602 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_data_offset, &N->scopes_data_beg, SZ32); | |
| 603 CHECK_FAIL(err); | |
| 604 | |
| 605 if (debug > 2 ) { | |
| 606 N->scopes_data_end = N->scopes_pcs_beg; | |
| 607 | |
| 608 fprintf(stderr, "\t nmethod_info: instrs_beg: %#x, instrs_end: %#x\n", | |
| 609 N->instrs_beg, N->instrs_end); | |
| 610 | |
| 611 fprintf(stderr, "\t nmethod_info: deopt_beg: %#x \n", | |
| 612 N->deopt_beg); | |
| 613 | |
| 614 fprintf(stderr, "\t nmethod_info: orig_pc_offset: %#x \n", | |
| 615 N->orig_pc_offset); | |
| 616 | |
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617 fprintf(stderr, "\t nmethod_info: metadata_beg: %#x, metadata_end: %#x\n", |
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618 N->metadata_beg, N->metadata_end); |
| 4006 | 619 |
| 620 fprintf(stderr, "\t nmethod_info: scopes_data_beg: %#x, scopes_data_end: %#x\n", | |
| 621 N->scopes_data_beg, N->scopes_data_end); | |
| 622 | |
| 623 fprintf(stderr, "\t nmethod_info: scopes_pcs_beg: %#x, scopes_pcs_end: %#x\n", | |
| 624 N->scopes_pcs_beg, N->scopes_pcs_end); | |
| 625 | |
| 626 fprintf(stderr, "\t nmethod_info: END \n\n"); | |
| 627 } | |
| 628 return PS_OK; | |
| 629 | |
| 630 fail: | |
| 631 return err; | |
| 632 } | |
| 633 | |
| 634 static int | |
| 635 raw_read_int(jvm_agent_t* J, uint64_t *buffer, int32_t *val) | |
| 636 { | |
| 637 int shift = 0; | |
| 638 int value = 0; | |
| 639 uint8_t ch = 0; | |
| 640 int32_t err; | |
| 641 int32_t sum; | |
| 642 // Constants for UNSIGNED5 coding of Pack200 | |
| 643 // see compressedStream.hpp | |
| 644 enum { | |
| 645 lg_H = 6, | |
| 646 H = 1<<lg_H, | |
| 647 BitsPerByte = 8, | |
| 648 L = (1<<BitsPerByte)-H, | |
| 649 }; | |
| 650 int i; | |
| 651 | |
| 652 err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t)); | |
| 653 CHECK_FAIL(err); | |
| 654 if (debug > 2) | |
| 655 fprintf(stderr, "\t\t\t raw_read_int: *buffer: %#llx, ch: %#x\n", *buffer, ch); | |
| 656 | |
| 657 sum = ch; | |
| 658 if ( sum >= L ) { | |
| 659 int32_t lg_H_i = lg_H; | |
| 660 // Read maximum of 5 total bytes (we've already read 1). | |
| 661 // See CompressedReadStream::read_int_mb | |
| 662 for ( i = 0; i < 4; i++) { | |
| 663 err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t)); | |
| 664 CHECK_FAIL(err); | |
| 665 sum += ch << lg_H_i; | |
| 666 if (ch < L ) { | |
| 667 *val = sum; | |
| 668 return PS_OK; | |
| 669 } | |
| 670 lg_H_i += lg_H; | |
| 671 } | |
| 672 } | |
| 673 *val = sum; | |
| 674 return PS_OK; | |
| 675 | |
| 676 fail: | |
| 677 return err; | |
| 678 } | |
| 679 | |
| 680 static int | |
| 681 read_pair(jvm_agent_t* J, uint64_t *buffer, int32_t *bci, int32_t *line) | |
| 682 { | |
| 683 uint8_t next = 0; | |
| 684 int32_t bci_delta; | |
| 685 int32_t line_delta; | |
| 686 int32_t err; | |
| 687 | |
| 688 if (debug > 2) | |
| 689 fprintf(stderr, "\t\t read_pair: BEGIN\n"); | |
| 690 | |
| 691 err = ps_pread(J->P, (*buffer)++, &next, sizeof(uint8_t)); | |
| 692 CHECK_FAIL(err); | |
| 693 | |
| 694 if (next == 0) { | |
| 695 if (debug > 2) | |
| 696 fprintf(stderr, "\t\t read_pair: END: next == 0\n"); | |
| 697 return 1; /* stream terminated */ | |
| 698 } | |
| 699 if (next == 0xFF) { | |
| 700 if (debug > 2) | |
| 701 fprintf(stderr, "\t\t read_pair: END: next == 0xFF\n"); | |
| 702 | |
| 703 /* Escape character, regular compression used */ | |
| 704 | |
| 705 err = raw_read_int(J, buffer, &bci_delta); | |
| 706 CHECK_FAIL(err); | |
| 707 | |
| 708 err = raw_read_int(J, buffer, &line_delta); | |
| 709 CHECK_FAIL(err); | |
| 710 | |
| 711 *bci += bci_delta; | |
| 712 *line += line_delta; | |
| 713 | |
| 714 if (debug > 2) { | |
| 715 fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n", | |
| 716 line_delta, bci_delta); | |
| 717 fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n", | |
| 718 *line, *bci); | |
| 719 } | |
| 720 } else { | |
| 721 /* Single byte compression used */ | |
| 722 *bci += next >> 3; | |
| 723 *line += next & 0x7; | |
| 724 if (debug > 2) { | |
| 725 fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n", | |
| 726 next & 0x7, next >> 3); | |
| 727 fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n", | |
| 728 *line, *bci); | |
| 729 } | |
| 730 } | |
| 731 if (debug > 2) | |
| 732 fprintf(stderr, "\t\t read_pair: END\n"); | |
| 733 return PS_OK; | |
| 734 | |
| 735 fail: | |
| 736 if (debug) | |
| 737 fprintf(stderr, "\t\t read_pair: FAIL\n"); | |
| 738 return err; | |
| 739 } | |
| 740 | |
| 741 static int | |
| 742 line_number_from_bci(jvm_agent_t* J, Vframe_t *vf) | |
| 743 { | |
| 744 uint64_t buffer; | |
| 745 uint16_t code_size; | |
| 746 uint64_t code_end_delta; | |
| 747 uint64_t constMethod; | |
| 748 int8_t access_flags; | |
| 749 int32_t best_bci = 0; | |
| 750 int32_t stream_bci = 0; | |
| 751 int32_t stream_line = 0; | |
| 752 int32_t err; | |
| 753 | |
| 754 if (debug > 2) { | |
| 755 char name[256]; | |
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756 err = name_for_methodPtr(J, vf->method, name, 256); |
| 4006 | 757 CHECK_FAIL(err); |
| 758 fprintf(stderr, "\t line_number_from_bci: BEGIN, method name: %s, targ bci: %d\n", | |
| 759 name, vf->bci); | |
| 760 } | |
| 761 | |
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762 err = read_pointer(J, vf->method + OFFSET_Method_constMethod, &constMethod); |
| 4006 | 763 CHECK_FAIL(err); |
| 764 | |
| 765 vf->line = 0; | |
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766 err = ps_pread(J->P, constMethod + OFFSET_ConstMethod_flags, &access_flags, sizeof(int8_t)); |
| 4006 | 767 CHECK_FAIL(err); |
| 768 | |
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769 if (!(access_flags & ConstMethod_has_linenumber_table)) { |
| 4006 | 770 if (debug > 2) |
| 771 fprintf(stderr, "\t line_number_from_bci: END: !HAS_LINE_NUMBER_TABLE \n\n"); | |
| 772 return PS_OK; | |
| 773 } | |
| 774 | |
| 775 /* The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
| 776 * Not necessarily sorted and not necessarily one-to-one. | |
| 777 */ | |
| 778 | |
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779 err = ps_pread(J->P, constMethod + OFFSET_ConstMethod_code_size, &code_size, SZ16); |
| 4006 | 780 CHECK_FAIL(err); |
| 781 | |
| 782 /* inlined_table_start() */ | |
| 783 code_end_delta = (uint64_t) (access_flags & AccessFlags_NATIVE) ? 2*POINTER_SIZE : 0; | |
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784 buffer = constMethod + (uint64_t) SIZE_ConstMethod + (uint64_t) code_size + code_end_delta; |
| 4006 | 785 |
| 786 if (debug > 2) { | |
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787 fprintf(stderr, "\t\t line_number_from_bci: method: %#llx, native: %d\n", |
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788 vf->method, (access_flags & AccessFlags_NATIVE)); |
| 4006 | 789 fprintf(stderr, "\t\t line_number_from_bci: buffer: %#llx, code_size: %d\n", |
| 790 buffer, (int) code_size); | |
| 791 } | |
| 792 | |
| 793 while (read_pair(J, &buffer, &stream_bci, &stream_line) == 0) { | |
| 794 if (stream_bci == vf->bci) { | |
| 795 /* perfect match */ | |
| 796 if (debug > 2) | |
| 797 fprintf(stderr, "\t line_number_from_bci: END: exact line: %ld \n\n", vf->line); | |
| 798 vf->line = stream_line; | |
| 799 return PS_OK; | |
| 800 } else { | |
| 801 /* update best_bci/line */ | |
| 802 if (stream_bci < vf->bci && stream_bci >= best_bci) { | |
| 803 best_bci = stream_bci; | |
| 804 vf->line = stream_line; | |
| 805 if (debug > 2) { | |
| 806 fprintf(stderr, "\t line_number_from_bci: best_bci: %ld, best_line: %ld\n", | |
| 807 best_bci, vf->line); | |
| 808 } | |
| 809 } | |
| 810 } | |
| 811 } | |
| 812 if (debug > 2) | |
| 813 fprintf(stderr, "\t line_number_from_bci: END: line: %ld \n\n", vf->line); | |
| 814 return PS_OK; | |
| 815 | |
| 816 fail: | |
| 817 if (debug) | |
| 818 fprintf(stderr, "\t line_number_from_bci: FAIL\n"); | |
| 819 return err; | |
| 820 } | |
| 821 | |
| 822 static int | |
| 823 get_real_pc(Nmethod_t *N, uint64_t pc_desc, uint64_t *real_pc) | |
| 824 { | |
| 825 int32_t pc_offset; | |
| 826 int32_t err; | |
| 827 | |
| 828 err = ps_pread(N->J->P, pc_desc + OFFSET_PcDesc_pc_offset, &pc_offset, SZ32); | |
| 829 CHECK_FAIL(err); | |
| 830 | |
| 831 *real_pc = N->nm + N->instrs_beg + pc_offset; | |
| 832 if (debug > 2) { | |
| 833 fprintf(stderr, "\t\t get_real_pc: pc_offset: %lx, real_pc: %llx\n", | |
| 834 pc_offset, *real_pc); | |
| 835 } | |
| 836 return PS_OK; | |
| 837 | |
| 838 fail: | |
| 839 return err; | |
| 840 } | |
| 841 | |
| 842 /* Finds a PcDesc with real-pc equal to N->pc */ | |
| 843 static int pc_desc_at(Nmethod_t *N) | |
| 844 { | |
| 845 uint64_t pc_diff; | |
| 846 int32_t offs; | |
| 847 int32_t err; | |
| 848 | |
| 849 if (debug > 2) | |
| 850 fprintf(stderr, "\t pc_desc_at: BEGIN\n"); | |
| 851 | |
| 852 N->vf_cnt = 0; | |
| 853 N->pc_desc = 0; | |
| 854 | |
| 855 for (offs = N->scopes_pcs_beg; offs < N->scopes_pcs_end; offs += SIZE_PcDesc) { | |
| 856 uint64_t pd; | |
| 857 uint64_t best_pc_diff = 16; /* some approximation */ | |
| 858 uint64_t real_pc = 0; | |
| 859 | |
| 860 pd = N->nm + offs; | |
| 861 err = get_real_pc(N, pd, &real_pc); | |
| 862 CHECK_FAIL(err); | |
| 863 | |
| 864 pc_diff = real_pc - N->pc; | |
| 865 | |
| 866 /* In general, this fragment should work */ | |
| 867 if (pc_diff == 0) { | |
| 868 N->pc_desc = pd; | |
| 869 if (debug) { | |
| 870 fprintf(stderr, "\t pc_desc_at: END: pc_desc: FOUND: %#lx \n\n", pd); | |
| 871 } | |
| 872 return PS_OK; | |
| 873 } | |
| 874 /* This fragment is to be able to find out an appropriate | |
| 875 * pc_desc entry even if pc_desc info is inaccurate. | |
| 876 */ | |
| 877 if (best_pc_diff > pc_diff && pc_diff > 0) { | |
| 878 best_pc_diff = pc_diff; | |
| 879 N->pc_desc = pd; | |
| 880 } | |
| 881 } | |
| 882 if (debug) { | |
| 883 fprintf(stderr, "\t pc_desc_at: END: pc_desc NOT FOUND"); | |
| 884 if (pc_diff < 20) | |
| 885 fprintf(stderr, ", best pc_diff: %d\n\n", pc_diff); | |
| 886 else | |
| 887 fprintf(stderr, "\n\n"); | |
| 888 } | |
| 889 return PS_OK; | |
| 890 | |
| 891 fail: | |
| 892 return err; | |
| 893 } | |
| 894 | |
| 895 static int | |
| 896 scope_desc_at(Nmethod_t *N, int32_t decode_offset, Vframe_t *vf) | |
| 897 { | |
| 898 uint64_t buffer; | |
| 899 int32_t err; | |
| 900 | |
| 901 if (debug > 2) { | |
| 902 fprintf(stderr, "\t\t scope_desc_at: BEGIN \n"); | |
| 903 } | |
| 904 | |
| 905 buffer = N->nm + N->scopes_data_beg + decode_offset; | |
| 906 | |
| 907 err = raw_read_int(N->J, &buffer, &vf->sender_decode_offset); | |
| 908 CHECK_FAIL(err); | |
| 909 | |
| 910 err = raw_read_int(N->J, &buffer, &vf->methodIdx); | |
| 911 CHECK_FAIL(err); | |
| 912 | |
| 913 err = raw_read_int(N->J, &buffer, &vf->bci); | |
| 914 CHECK_FAIL(err); | |
| 915 | |
| 916 if (debug > 2) { | |
| 917 fprintf(stderr, "\t\t scope_desc_at: sender_decode_offset: %#x\n", | |
| 918 vf->sender_decode_offset); | |
| 919 fprintf(stderr, "\t\t scope_desc_at: methodIdx: %d\n", vf->methodIdx); | |
| 920 fprintf(stderr, "\t\t scope_desc_at: bci: %d\n", vf->bci); | |
| 921 | |
| 922 fprintf(stderr, "\t\t scope_desc_at: END \n\n"); | |
| 923 } | |
| 924 return PS_OK; | |
| 925 | |
| 926 fail: | |
| 927 return err; | |
| 928 } | |
| 929 | |
| 930 static int scopeDesc_chain(Nmethod_t *N) { | |
| 931 int32_t decode_offset = 0; | |
| 932 int32_t err; | |
| 933 | |
| 934 if (debug > 2) { | |
| 935 fprintf(stderr, "\t scopeDesc_chain: BEGIN\n"); | |
| 936 } | |
| 937 | |
| 938 err = ps_pread(N->J->P, N->pc_desc + OFFSET_PcDesc_scope_decode_offset, | |
| 939 &decode_offset, SZ32); | |
| 940 CHECK_FAIL(err); | |
| 941 | |
| 942 while (decode_offset > 0) { | |
| 943 Vframe_t *vf = &N->vframes[N->vf_cnt]; | |
| 944 | |
| 945 if (debug > 2) { | |
| 946 fprintf(stderr, "\t scopeDesc_chain: decode_offset: %#x\n", decode_offset); | |
| 947 } | |
| 948 | |
| 949 err = scope_desc_at(N, decode_offset, vf); | |
| 950 CHECK_FAIL(err); | |
| 951 | |
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952 if (vf->methodIdx > ((N->metadata_end - N->metadata_beg) / POINTER_SIZE)) { |
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953 fprintf(stderr, "\t scopeDesc_chain: (methodIdx > metadata length) !\n"); |
| 4006 | 954 return -1; |
| 955 } | |
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956 err = read_pointer(N->J, N->nm + N->metadata_beg + (vf->methodIdx-1)*POINTER_SIZE, |
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957 &vf->method); |
| 4006 | 958 CHECK_FAIL(err); |
| 959 | |
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960 if (vf->method) { |
| 4006 | 961 N->vf_cnt++; |
| 962 err = line_number_from_bci(N->J, vf); | |
| 963 CHECK_FAIL(err); | |
| 964 if (debug > 2) { | |
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965 fprintf(stderr, "\t scopeDesc_chain: method: %#8llx, line: %ld\n", |
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966 vf->method, vf->line); |
| 4006 | 967 } |
| 968 } | |
| 969 decode_offset = vf->sender_decode_offset; | |
| 970 } | |
| 971 if (debug > 2) { | |
| 972 fprintf(stderr, "\t scopeDesc_chain: END \n\n"); | |
| 973 } | |
| 974 return PS_OK; | |
| 975 | |
| 976 fail: | |
| 977 if (debug) { | |
| 978 fprintf(stderr, "\t scopeDesc_chain: FAIL \n\n"); | |
| 979 } | |
| 980 return err; | |
| 981 } | |
| 982 | |
| 983 | |
| 984 static int | |
| 985 name_for_nmethod(jvm_agent_t* J, | |
| 986 uint64_t nm, | |
| 987 uint64_t pc, | |
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988 uint64_t method, |
| 4006 | 989 char *result, |
| 990 size_t size, | |
| 991 Jframe_t *jframe | |
| 992 ) { | |
| 993 Nmethod_t *N; | |
| 994 Vframe_t *vf; | |
| 995 int32_t err; | |
| 996 int deoptimized = 0; | |
| 997 | |
| 998 if (debug) { | |
| 999 fprintf(stderr, "name_for_nmethod: BEGIN: nmethod: %#llx, pc: %#llx\n", nm, pc); | |
| 1000 } | |
| 1001 if (J->N == NULL) { | |
| 1002 J->N = (Nmethod_t *) malloc(sizeof(Nmethod_t)); | |
| 1003 } | |
| 1004 memset(J->N, 0, sizeof(Nmethod_t)); /* Initial stat: all values are zeros */ | |
| 1005 N = J->N; | |
| 1006 N->J = J; | |
| 1007 N->nm = nm; | |
| 1008 N->pc = pc; | |
| 1009 N->jframe = jframe; | |
| 1010 | |
| 1011 err = nmethod_info(N); | |
| 1012 CHECK_FAIL(err); | |
| 1013 if (debug) { | |
| 1014 fprintf(stderr, "name_for_nmethod: pc: %#llx, deopt_pc: %#llx\n", | |
| 1015 pc, N->nm + N->deopt_beg); | |
| 1016 } | |
| 1017 | |
| 1018 /* check for a deoptimized frame */ | |
| 1019 if ( pc == N->nm + N->deopt_beg) { | |
| 1020 uint64_t base; | |
| 1021 if (debug) { | |
| 1022 fprintf(stderr, "name_for_nmethod: found deoptimized frame\n"); | |
| 1023 } | |
| 1024 if (J->prev_fr.sender_sp != 0) { | |
| 1025 base = J->prev_fr.sender_sp + N->orig_pc_offset; | |
| 1026 } else { | |
| 1027 base = J->curr_fr.sp + N->orig_pc_offset; | |
| 1028 } | |
| 1029 err = read_pointer(J, base, &N->pc); | |
| 1030 CHECK_FAIL(err); | |
| 1031 if (debug) { | |
| 1032 fprintf(stderr, "name_for_nmethod: found deoptimized frame converting pc from %#8llx to %#8llx\n", | |
| 1033 pc, N->pc); | |
| 1034 } | |
| 1035 deoptimized = 1; | |
| 1036 } | |
| 1037 | |
| 1038 err = pc_desc_at(N); | |
| 1039 CHECK_FAIL(err); | |
| 1040 | |
| 1041 if (N->pc_desc > 0) { | |
| 1042 jframe->locinf = 1; | |
| 1043 err = scopeDesc_chain(N); | |
| 1044 CHECK_FAIL(err); | |
| 1045 } | |
| 1046 result[0] = COMP_METHOD_SIGN; | |
| 1047 vf = &N->vframes[0]; | |
| 1048 if (N->vf_cnt > 0) { | |
| 1049 jframe->vf_cnt = N->vf_cnt; | |
| 1050 jframe->bci = vf->bci; | |
| 1051 jframe->line = vf->line; | |
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1052 err = name_for_methodPtr(J, N->vframes[0].method, result+1, size-1); |
| 4006 | 1053 CHECK_FAIL(err); |
| 1054 } else { | |
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1055 err = name_for_methodPtr(J, method, result+1, size-1); |
| 4006 | 1056 CHECK_FAIL(err); |
| 1057 } | |
| 1058 if (deoptimized) { | |
| 1059 strncat(result + 1, " [deoptimized frame]; ", size-1); | |
| 1060 } else { | |
| 1061 strncat(result + 1, " [compiled] ", size-1); | |
| 1062 } | |
| 1063 if (debug) | |
| 1064 fprintf(stderr, "name_for_nmethod: END: method name: %s, vf_cnt: %d\n\n", | |
| 1065 result, N->vf_cnt); | |
| 1066 return PS_OK; | |
| 1067 | |
| 1068 fail: | |
| 1069 if (debug) | |
| 1070 fprintf(stderr, "name_for_nmethod: FAIL \n\n"); | |
| 1071 return err; | |
| 1072 } | |
| 1073 | |
| 1074 int is_bci(intptr_t bcx) { | |
| 1075 switch (DATA_MODEL) { | |
| 1076 case PR_MODEL_LP64: | |
| 1077 return ((uintptr_t) bcx) <= ((uintptr_t) MAX_METHOD_CODE_SIZE) ; | |
| 1078 case PR_MODEL_ILP32: | |
| 1079 default: | |
| 1080 return 0 <= bcx && bcx <= MAX_METHOD_CODE_SIZE; | |
| 1081 } | |
| 1082 } | |
| 1083 | |
| 1084 static int | |
| 1085 name_for_imethod(jvm_agent_t* J, | |
| 1086 uint64_t bcx, | |
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1087 uint64_t method, |
| 4006 | 1088 char *result, |
| 1089 size_t size, | |
| 1090 Jframe_t *jframe | |
| 1091 ) { | |
| 1092 uint64_t bci; | |
| 1093 uint64_t constMethod; | |
| 1094 Vframe_t vframe = {0}; | |
| 1095 Vframe_t *vf = &vframe; | |
| 1096 int32_t err; | |
| 1097 | |
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1098 err = read_pointer(J, method + OFFSET_Method_constMethod, &constMethod); |
| 4006 | 1099 CHECK_FAIL(err); |
| 1100 | |
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1101 bci = is_bci(bcx) ? bcx : bcx - (constMethod + (uint64_t) SIZE_ConstMethod); |
| 4006 | 1102 |
| 1103 if (debug) | |
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1104 fprintf(stderr, "\t name_for_imethod: BEGIN: method: %#llx\n", method); |
| 4006 | 1105 |
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1106 err = name_for_methodPtr(J, method, result, size); |
| 4006 | 1107 CHECK_FAIL(err); |
| 1108 if (debug) | |
| 1109 fprintf(stderr, "\t name_for_imethod: method name: %s\n", result); | |
| 1110 | |
| 1111 if (bci > 0) { | |
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1112 vf->method = method; |
| 4006 | 1113 vf->bci = bci; |
| 1114 err = line_number_from_bci(J, vf); | |
| 1115 CHECK_FAIL(err); | |
| 1116 } | |
| 1117 jframe->bci = vf->bci; | |
| 1118 jframe->line = vf->line; | |
| 1119 jframe->locinf = 1; | |
| 1120 | |
| 1121 if (debug) { | |
| 1122 fprintf(stderr, "\t name_for_imethod: END: bci: %d, line: %d\n\n", | |
| 1123 vf->bci, vf->line); | |
| 1124 } | |
| 1125 return PS_OK; | |
| 1126 | |
| 1127 fail: | |
| 1128 if (debug) | |
| 1129 fprintf(stderr, "\t name_for_imethod: FAIL\n"); | |
| 1130 return err; | |
| 1131 } | |
| 1132 | |
| 1133 static int | |
| 1134 name_for_codecache(jvm_agent_t* J, uint64_t fp, uint64_t pc, char * result, | |
| 1135 size_t size, Jframe_t *jframe, int* is_interpreted) | |
| 1136 { | |
| 1137 uint64_t start; | |
| 1138 uint64_t vtbl; | |
| 1139 int32_t err; | |
| 1140 *is_interpreted = 0; | |
| 1141 | |
| 1142 result[0] = '\0'; | |
| 1143 | |
| 1144 err = find_start(J, pc, &start); | |
| 1145 CHECK_FAIL(err); | |
| 1146 | |
| 1147 err = read_pointer(J, start, &vtbl); | |
| 1148 CHECK_FAIL(err); | |
| 1149 | |
| 1150 if (vtbl == J->nmethod_vtbl) { | |
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1151 uint64_t method; |
| 4006 | 1152 |
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1153 err = read_pointer(J, start + OFFSET_nmethod_method, &method); |
| 4006 | 1154 CHECK_FAIL(err); |
| 1155 | |
| 1156 if (debug) { | |
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1157 fprintf(stderr, "name_for_codecache: start: %#8llx, pc: %#8llx, method: %#8llx \n", |
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1158 start, pc, method); |
| 4006 | 1159 } |
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1160 err = name_for_nmethod(J, start, pc, method, result, size, jframe); |
| 4006 | 1161 CHECK_FAIL(err); |
| 1162 } else if (vtbl == J->BufferBlob_vtbl) { | |
| 1163 const char * name; | |
| 1164 | |
| 1165 err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name); | |
| 1166 | |
| 1167 /* | |
| 1168 * Temporary usage of string "Interpreter". | |
| 1169 * We need some other way to distinguish "StubRoutines" | |
| 1170 * and regular interpreted frames. | |
| 1171 */ | |
| 1172 if (err == PS_OK && strncmp(name, "Interpreter", 11) == 0) { | |
| 1173 *is_interpreted = 1; | |
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1174 if (is_method(J, J->methodPtr)) { |
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1175 return name_for_imethod(J, J->bcx, J->methodPtr, result, size, jframe); |
| 4006 | 1176 } |
| 1177 } | |
| 1178 | |
| 1179 if (err == PS_OK) { | |
| 1180 strncpy(result, name, size); | |
| 1181 free((void*)name); | |
| 1182 } else { | |
| 1183 strncpy(result, "<unknown BufferBlob>", size); | |
| 1184 } | |
| 1185 /* return PS_OK; */ | |
| 1186 } else { | |
| 1187 const char * name; | |
| 1188 | |
| 1189 err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name); | |
| 1190 if (err == PS_OK) { | |
| 1191 strncpy(result, name, size); | |
| 1192 free((void*)name); | |
| 1193 } else { | |
| 1194 strncpy(result, "<unknown CodeBlob>", size); | |
| 1195 WARN1("unknown CodeBlob: vtbl = 0x%x", vtbl); | |
| 1196 } | |
| 1197 } | |
| 1198 result[size-1] = '\0'; | |
| 1199 | |
| 1200 #ifdef X86_COMPILER2 | |
| 1201 if (vtbl != J->RuntimeStub_vtbl) { | |
| 1202 uint64_t trial_pc; | |
| 1203 int frame_size; | |
| 1204 err = ps_pread(J->P, start + OFFSET_CodeBlob_frame_size, | |
| 1205 &frame_size, SZ32); | |
| 1206 CHECK_FAIL(err); | |
| 1207 | |
| 1208 // frame_size is in words, we want bytes. | |
| 1209 frame_size *= POINTER_SIZE; /* word => byte conversion */ | |
| 1210 | |
| 1211 /* | |
| 1212 Because c2 doesn't use FP as a framepointer the value of sp/fp we receive | |
| 1213 in the initial entry to a set of stack frames containing server frames | |
| 1214 will pretty much be nonsense. We can detect that nonsense by looking to | |
| 1215 see if the PC we received is correct if we look at the expected storage | |
| 1216 location in relation to the FP (ie. POINTER_SIZE(FP) ) | |
| 1217 */ | |
| 1218 | |
| 1219 err = read_pointer(J, fp + POINTER_SIZE , &trial_pc); | |
| 1220 if ( (err != PS_OK || trial_pc != pc) && frame_size > 0 ) { | |
| 1221 // Either we couldn't even read at the "fp" or the pc didn't match | |
| 1222 // both are sure clues that the fp is bogus. We no search the stack | |
| 1223 // for a reasonable number of words trying to find the bogus fp | |
| 1224 // and the current pc in adjacent words. The we will be able to | |
| 1225 // deduce an approximation of the frame pointer and actually get | |
| 1226 // the correct stack pointer. Which we can then unwind for the | |
| 1227 // next frame. | |
| 1228 int i; | |
| 1229 uint64_t check; | |
| 1230 uint64_t base = J->curr_fr.sp; | |
| 1231 uint64_t prev_fp = 0; | |
| 1232 for ( i = 0; i < frame_size * 5 ; i++, base += POINTER_SIZE ) { | |
| 1233 err = read_pointer(J, base , &check); | |
| 1234 CHECK_FAIL(err); | |
| 1235 if (check == fp) { | |
| 1236 base += POINTER_SIZE; | |
| 1237 err = read_pointer(J, base , &check); | |
| 1238 CHECK_FAIL(err); | |
| 1239 if (check == pc) { | |
| 1240 if (debug) { | |
| 1241 fprintf(stderr, "name_for_codecache: found matching fp/pc combo at 0x%llx\n", base - POINTER_SIZE); | |
| 1242 } | |
| 1243 prev_fp = base - 2 * POINTER_SIZE; | |
| 1244 break; | |
| 1245 } | |
| 1246 } | |
| 1247 } | |
| 1248 if ( prev_fp != 0 ) { | |
| 1249 // real_sp is the sp we should have received for this frame | |
| 1250 uint64_t real_sp = prev_fp + 2 * POINTER_SIZE; | |
| 1251 // +POINTER_SIZE because callee owns the return address so caller's sp is +1 word | |
| 1252 jframe->new_sp = real_sp + frame_size + POINTER_SIZE; | |
| 1253 err = read_pointer(J, jframe->new_sp - POINTER_SIZE , &jframe->new_pc); | |
| 1254 CHECK_FAIL(err); | |
| 1255 err = read_pointer(J, jframe->new_sp - 2*POINTER_SIZE, &jframe->new_fp); | |
| 1256 CHECK_FAIL(err); | |
| 1257 return PS_OK; | |
| 1258 } | |
| 1259 } | |
| 1260 | |
| 1261 /* A prototype to workaround FP absence */ | |
| 1262 /* | |
| 1263 * frame_size can be 0 for StubRoutines (1) frame. | |
| 1264 * In this case it should work with fp as usual. | |
| 1265 */ | |
| 1266 if (frame_size > 0) { | |
| 1267 jframe->new_fp = J->prev_fr.fp + frame_size; | |
| 1268 jframe->new_sp = jframe->new_fp + 2 * POINTER_SIZE; | |
| 1269 } else { | |
| 1270 memset(&J->curr_fr, 0, sizeof(Frame_t)); | |
| 1271 err = read_pointer(J, fp, &jframe->new_fp); | |
| 1272 CHECK_FAIL(err); | |
| 1273 | |
| 1274 err = read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc); | |
| 1275 CHECK_FAIL(err); | |
| 1276 } | |
| 1277 if (debug) { | |
| 1278 fprintf(stderr, "name_for_codecache: %s, frame_size=%#lx\n", | |
| 1279 result, frame_size); | |
| 1280 fprintf(stderr, "name_for_codecache: prev_fr.fp=%#lx, fp=%#lx\n", | |
| 1281 J->prev_fr.fp, jframe->new_fp); | |
| 1282 } | |
| 1283 } | |
| 1284 #endif /* X86_COMPILER2 */ | |
| 1285 | |
| 1286 return PS_OK; | |
| 1287 | |
| 1288 fail: | |
| 1289 return err; | |
| 1290 } | |
| 1291 | |
| 1292 int Jget_vframe(jvm_agent_t* J, int vframe_no, | |
| 1293 char *name, size_t size, Jframe_t *jframe) | |
| 1294 { | |
| 1295 Nmethod_t *N = J->N; | |
| 1296 Vframe_t *vf; | |
| 1297 int32_t err; | |
| 1298 | |
| 1299 if (vframe_no >= N->vf_cnt) { | |
| 1300 (void) sprintf(name, "Wrong inlinedMethod%1d()", vframe_no); | |
| 1301 return -1; | |
| 1302 } | |
| 1303 vf = N->vframes + vframe_no; | |
| 1304 name[0] = COMP_METHOD_SIGN; | |
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1305 err = name_for_methodPtr(J, vf->method, name + 1, size); |
| 4006 | 1306 CHECK_FAIL(err); |
| 1307 | |
| 1308 jframe->bci = vf->bci; | |
| 1309 jframe->line = vf->line; | |
| 1310 if (debug) { | |
| 1311 fprintf(stderr, "\t Jget_vframe: method name: %s, line: %ld\n", | |
| 1312 name, vf->line); | |
| 1313 } | |
| 1314 return PS_OK; | |
| 1315 | |
| 1316 fail: | |
| 1317 if (debug) { | |
| 1318 fprintf(stderr, "\t Jget_vframe: FAIL\n"); | |
| 1319 } | |
| 1320 return err; | |
| 1321 } | |
| 1322 | |
| 1323 #define MAX_SYM_SIZE 256 | |
| 1324 | |
| 1325 int Jlookup_by_regs(jvm_agent_t* J, const prgregset_t regs, char *name, | |
| 1326 size_t size, Jframe_t *jframe) { | |
| 1327 uintptr_t fp; | |
| 1328 uintptr_t pc; | |
| 1329 /* arguments given to read_pointer need to be worst case sized */ | |
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1330 uint64_t methodPtr = 0; |
| 4006 | 1331 uint64_t sender_sp; |
| 1332 uint64_t bcx = 0; | |
| 1333 int is_interpreted = 0; | |
| 1334 int result = PS_OK; | |
| 1335 int err = PS_OK; | |
| 1336 | |
| 1337 if (J == NULL) { | |
| 1338 return -1; | |
| 1339 } | |
| 1340 | |
| 1341 jframe->vf_cnt = 1; | |
| 1342 jframe->new_fp = 0; | |
| 1343 jframe->new_pc = 0; | |
| 1344 jframe->line = 0; | |
| 1345 jframe->bci = 0; | |
| 1346 jframe->locinf = 0; | |
| 1347 | |
| 1348 read_volatiles(J); | |
| 1349 pc = (uintptr_t) regs[R_PC]; | |
| 1350 J->curr_fr.pc = pc; | |
| 1351 J->curr_fr.fp = regs[R_FP]; | |
| 1352 J->curr_fr.sp = regs[R_SP]; | |
| 1353 | |
| 1354 if (debug) | |
| 1355 fprintf(stderr, "Jlookup_by_regs: BEGINs: fp=%#lx, pc=%#lx\n", regs[R_FP], pc); | |
| 1356 | |
| 1357 #if defined(sparc) || defined(__sparc) | |
| 1358 /* The following workaround is for SPARC. CALL instruction occupates 8 bytes. | |
| 1359 * In the pcDesc structure return pc offset is recorded for CALL instructions. | |
| 1360 * regs[R_PC] contains a CALL instruction pc offset. | |
| 1361 */ | |
| 1362 pc += 8; | |
| 1363 bcx = (uintptr_t) regs[R_L1]; | |
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1364 methodPtr = (uintptr_t) regs[R_L2]; |
| 4006 | 1365 sender_sp = regs[R_I5]; |
| 1366 if (debug > 2) { | |
| 1367 fprintf(stderr, "\nregs[R_I1]=%lx, regs[R_I2]=%lx, regs[R_I5]=%lx, regs[R_L1]=%lx, regs[R_L2]=%lx\n", | |
| 1368 regs[R_I1], regs[R_I2], regs[R_I5], regs[R_L1], regs[R_L2]); | |
| 1369 } | |
| 1370 #elif defined(i386) || defined(__i386) || defined(__amd64) | |
| 1371 | |
| 1372 fp = (uintptr_t) regs[R_FP]; | |
| 1373 if (J->prev_fr.fp == 0) { | |
| 1374 #ifdef X86_COMPILER2 | |
| 1375 /* A workaround for top java frames */ | |
| 1376 J->prev_fr.fp = (uintptr_t)(regs[R_SP] - 2 * POINTER_SIZE); | |
| 1377 #else | |
| 1378 J->prev_fr.fp = (uintptr_t)(regs[R_SP] - POINTER_SIZE); | |
| 1379 #endif /* COMPILER2 */ | |
| 1380 } | |
| 1381 if (debug > 2) { | |
| 1382 printf("Jlookup_by_regs: J->prev_fr.fp = %#lx\n", J->prev_fr.fp); | |
| 1383 } | |
| 1384 | |
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1385 if (read_pointer(J, fp + OFFSET_interpreter_frame_method, &methodPtr) != PS_OK) { |
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1386 methodPtr = 0; |
| 4006 | 1387 } |
| 1388 if (read_pointer(J, fp + OFFSET_interpreter_frame_sender_sp, &sender_sp) != PS_OK) { | |
| 1389 sender_sp = 0; | |
| 1390 } | |
| 1391 if (read_pointer(J, fp + OFFSET_interpreter_frame_bcx_offset, &bcx) != PS_OK) { | |
| 1392 bcx = 0; | |
| 1393 } | |
| 1394 #endif /* i386 */ | |
| 1395 | |
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1396 J->methodPtr = methodPtr; |
| 4006 | 1397 J->bcx = bcx; |
| 1398 | |
| 1399 /* On x86 with C2 JVM: native frame may have wrong regs[R_FP] | |
| 1400 * For example: JVM_SuspendThread frame poins to the top interpreted frame. | |
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1401 * If we call is_method(J, methodPtr) before codecache_contains(J, pc) |
| 4006 | 1402 * then we go over and omit both: nmethod and I2CAdapter frames. |
| 1403 * Note, that regs[R_PC] is always correct if frame defined correctly. | |
| 1404 * So it is better to call codecache_contains(J, pc) from the beginning. | |
| 1405 */ | |
| 1406 #ifndef X86_COMPILER2 | |
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1407 if (is_method(J, J->methodPtr)) { |
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1408 result = name_for_imethod(J, bcx, J->methodPtr, name, size, jframe); |
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1409 /* If the methodPtr is a method then this is highly likely to be |
| 4006 | 1410 an interpreter frame */ |
| 1411 if (result >= 0) { | |
| 1412 is_interpreted = 1; | |
| 1413 } | |
| 1414 } else | |
| 1415 #endif /* ! X86_COMPILER2 */ | |
| 1416 | |
| 1417 if (codecache_contains(J, pc)) { | |
| 1418 result = name_for_codecache(J, fp, pc, name, size, jframe, &is_interpreted); | |
| 1419 } | |
| 1420 #ifdef X86_COMPILER2 | |
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1421 else if (is_method(J, J->methodPtr)) { |
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1422 result = name_for_imethod(J, bcx, J->methodPtr, name, size, jframe); |
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1423 /* If the methodPtr is a method then this is highly likely to be |
| 4006 | 1424 an interpreter frame */ |
| 1425 if (result >= 0) { | |
| 1426 is_interpreted = 1; | |
| 1427 } | |
| 1428 } | |
| 1429 #endif /* X86_COMPILER2 */ | |
| 1430 else { | |
| 1431 if (debug) { | |
| 1432 fprintf(stderr, "Jlookup_by_regs: END with -1\n\n"); | |
| 1433 } | |
| 1434 result = -1; | |
| 1435 } | |
| 1436 if (!is_interpreted) { | |
| 1437 sender_sp = 0; | |
| 1438 } | |
| 1439 J->curr_fr.sender_sp = sender_sp; | |
| 1440 | |
| 1441 #ifdef X86_COMPILER2 | |
| 1442 if (!J->curr_fr.fp) { | |
| 1443 J->curr_fr.fp = (jframe->new_fp) ? jframe->new_fp : (uintptr_t)regs[R_FP]; | |
| 1444 } | |
| 1445 if (!jframe->new_pc && jframe->new_fp) { | |
| 1446 // This seems dubious | |
| 1447 read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc); | |
| 1448 CHECK_FAIL(err); | |
| 1449 if (debug > 2) { | |
| 1450 printf("Jlookup_by_regs: (update pc) jframe->new_fp: %#llx, jframe->new_pc: %#llx\n", | |
| 1451 jframe->new_fp, jframe->new_pc); | |
| 1452 } | |
| 1453 } | |
| 1454 | |
| 1455 #endif /* X86_COMPILER2 */ | |
| 1456 J->prev_fr = J->curr_fr; | |
| 1457 | |
| 1458 if (debug) | |
| 1459 fprintf(stderr, "Jlookup_by_regs: END\n\n"); | |
| 1460 | |
| 1461 return result; | |
| 1462 | |
| 1463 fail: | |
| 1464 return err; | |
| 1465 } | |
| 1466 | |
| 1467 void update_gregs(prgregset_t gregs, Jframe_t jframe) { | |
| 1468 #ifdef X86_COMPILER2 | |
| 1469 if (debug > 0) { | |
| 1470 fprintf(stderr, "update_gregs: before update sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]); | |
| 1471 } | |
| 1472 /* | |
| 1473 * A workaround for java C2 frames with unconventional FP. | |
| 1474 * may have to modify regset with new values for FP/PC/SP when needed. | |
| 1475 */ | |
| 1476 if (jframe.new_sp) { | |
| 1477 *((uintptr_t *) &gregs[R_SP]) = (uintptr_t) jframe.new_sp; | |
| 1478 } else { | |
| 1479 // *((uintptr_t *) &gregs[R_SP]) = (uintptr_t) gregs[R_FP] + 2 * POINTER_SIZE; | |
| 1480 } | |
| 1481 | |
| 1482 if (jframe.new_fp) { | |
| 1483 *((uintptr_t *) &gregs[R_FP]) = (uintptr_t) jframe.new_fp; | |
| 1484 } | |
| 1485 if (jframe.new_pc) { | |
| 1486 *((uintptr_t *) &gregs[R_PC]) = (uintptr_t) jframe.new_pc; | |
| 1487 } | |
| 1488 if (debug > 0) { | |
| 1489 fprintf(stderr, "update_gregs: after update sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]); | |
| 1490 } | |
| 1491 #endif /* X86_COMPILER2 */ | |
| 1492 } | |
| 1493 | |
| 1494 /* | |
| 1495 * Iterates over java frames at current location given by 'gregs'. | |
| 1496 * | |
| 1497 * Returns -1 if no java frames are present or if an error is encountered. | |
| 1498 * Returns the result of calling 'func' if the return value is non-zero. | |
| 1499 * Returns 0 otherwise. | |
| 1500 */ | |
| 1501 int Jframe_iter(jvm_agent_t *J, prgregset_t gregs, java_stack_f *func, void* cld) { | |
| 1502 char buf[MAX_SYM_SIZE + 1]; | |
| 1503 Jframe_t jframe; | |
| 1504 int i = 0, res; | |
| 1505 #ifdef X86_COMPILER2 | |
| 1506 if (debug > 0) { | |
| 1507 fprintf(stderr, "Jframe_iter: Entry sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]); | |
| 1508 } | |
| 1509 #endif /* X86_COMPILER2 */ | |
| 1510 | |
| 1511 memset(&jframe, 0, sizeof(Jframe_t)); | |
| 1512 memset(buf, 0, sizeof(buf)); | |
| 1513 res = Jlookup_by_regs(J, gregs, buf, sizeof(buf), &jframe); | |
| 1514 if (res != PS_OK) | |
| 1515 return (-1); | |
| 1516 | |
| 1517 | |
| 1518 res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1, | |
| 1519 jframe.line, NULL); | |
| 1520 if (res != 0) { | |
| 1521 update_gregs(gregs, jframe); | |
| 1522 return (res); | |
| 1523 } | |
| 1524 for (i = 1; i < jframe.vf_cnt; i++) { | |
| 1525 Jget_vframe(J, i, buf, sizeof(buf), &jframe); | |
| 1526 res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1, | |
| 1527 jframe.line, NULL); | |
| 1528 if (res != 0) { | |
| 1529 update_gregs(gregs, jframe); | |
| 1530 return (res); | |
| 1531 } | |
| 1532 } | |
| 1533 update_gregs(gregs, jframe); | |
| 1534 return (0); | |
| 1535 } |