Mercurial > hg > truffle
annotate src/os/solaris/dtrace/libjvm_db.c @ 2426:1d1603768966
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Tue, 05 Apr 2011 14:12:31 -0700 |
| parents | 8a3f8defe568 |
| children | 2fe087c3e814 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 2011, 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 #include <stdio.h> | |
| 26 #include <stdlib.h> | |
| 27 #include <string.h> | |
| 28 #include <errno.h> | |
| 29 #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 { | |
| 104 uint64_t methodOop; | |
| 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 */ | |
| 1748 | 127 int32_t instrs_beg; /* _code_offset */ |
| 0 | 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; | |
| 132 int32_t oops_beg; /* _oops_offset */ | |
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133 int32_t oops_end; |
| 0 | 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; | |
| 148 | |
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149 uint64_t Use_Compressed_Oops_address; |
| 0 | 150 uint64_t Universe_methodKlassObj_address; |
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151 uint64_t Universe_narrow_oop_base_address; |
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152 uint64_t Universe_narrow_oop_shift_address; |
| 0 | 153 uint64_t CodeCache_heap_address; |
| 154 | |
| 155 /* Volatiles */ | |
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156 uint8_t Use_Compressed_Oops; |
| 0 | 157 uint64_t Universe_methodKlassObj; |
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158 uint64_t Universe_narrow_oop_base; |
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159 uint32_t Universe_narrow_oop_shift; |
| 0 | 160 uint64_t CodeCache_low; |
| 161 uint64_t CodeCache_high; | |
| 162 uint64_t CodeCache_segmap_low; | |
| 163 uint64_t CodeCache_segmap_high; | |
| 164 | |
| 165 int32_t SIZE_CodeCache_log2_segment; | |
| 166 | |
| 167 uint64_t methodOopPtr; | |
| 168 uint64_t bcx; | |
| 169 | |
| 170 Nmethod_t *N; /*Inlined methods support */ | |
| 171 Frame_t prev_fr; | |
| 172 Frame_t curr_fr; | |
| 173 }; | |
| 174 | |
| 175 static int | |
| 176 read_string(struct ps_prochandle *P, | |
| 177 char *buf, /* caller's buffer */ | |
| 178 size_t size, /* upper limit on bytes to read */ | |
| 179 uintptr_t addr) /* address in process */ | |
| 180 { | |
| 181 int err = PS_OK; | |
| 182 while (size-- > 1 && err == PS_OK) { | |
| 183 err = ps_pread(P, addr, buf, 1); | |
| 184 if (*buf == '\0') { | |
| 185 return PS_OK; | |
| 186 } | |
| 187 addr += 1; | |
| 188 buf += 1; | |
| 189 } | |
| 190 return -1; | |
| 191 } | |
| 192 | |
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193 static int read_compressed_pointer(jvm_agent_t* J, uint64_t base, uint32_t *ptr) { |
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194 int err = -1; |
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195 uint32_t ptr32; |
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196 err = ps_pread(J->P, base, &ptr32, sizeof(uint32_t)); |
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197 *ptr = ptr32; |
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198 return err; |
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199 } |
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200 |
| 0 | 201 static int read_pointer(jvm_agent_t* J, uint64_t base, uint64_t* ptr) { |
| 202 int err = -1; | |
| 203 uint32_t ptr32; | |
| 204 | |
| 205 switch (DATA_MODEL) { | |
| 206 case PR_MODEL_LP64: | |
| 207 err = ps_pread(J->P, base, ptr, sizeof(uint64_t)); | |
| 208 break; | |
| 209 case PR_MODEL_ILP32: | |
| 210 err = ps_pread(J->P, base, &ptr32, sizeof(uint32_t)); | |
| 211 *ptr = ptr32; | |
| 212 break; | |
| 213 } | |
| 214 | |
| 215 return err; | |
| 216 } | |
| 217 | |
| 218 static int read_string_pointer(jvm_agent_t* J, uint64_t base, const char ** stringp) { | |
| 219 uint64_t ptr; | |
| 220 int err; | |
| 221 char buffer[1024]; | |
| 222 | |
| 223 *stringp = NULL; | |
| 224 err = read_pointer(J, base, &ptr); | |
| 225 CHECK_FAIL(err); | |
| 226 if (ptr != 0) { | |
| 227 err = read_string(J->P, buffer, sizeof(buffer), ptr); | |
| 228 CHECK_FAIL(err); | |
| 229 *stringp = strdup(buffer); | |
| 230 } | |
| 231 return PS_OK; | |
| 232 | |
| 233 fail: | |
| 234 return err; | |
| 235 } | |
| 236 | |
| 237 static int parse_vmstruct_entry(jvm_agent_t* J, uint64_t base, VMStructEntry* vmp) { | |
| 238 uint64_t ptr; | |
| 239 int err; | |
| 240 | |
| 241 err = read_string_pointer(J, base + OFFSET_VMStructEntrytypeName, &vmp->typeName); | |
| 242 CHECK_FAIL(err); | |
| 243 err = read_string_pointer(J, base + OFFSET_VMStructEntryfieldName, &vmp->fieldName); | |
| 244 CHECK_FAIL(err); | |
| 245 err = read_pointer(J, base + OFFSET_VMStructEntryaddress, &vmp->address); | |
| 246 CHECK_FAIL(err); | |
| 247 | |
| 248 return PS_OK; | |
| 249 | |
| 250 fail: | |
| 251 if (vmp->typeName != NULL) free((void*)vmp->typeName); | |
| 252 if (vmp->fieldName != NULL) free((void*)vmp->fieldName); | |
| 253 return err; | |
| 254 } | |
| 255 | |
| 256 static int parse_vmstructs(jvm_agent_t* J) { | |
| 257 VMStructEntry vmVar; | |
| 258 VMStructEntry* vmp = &vmVar; | |
| 259 uint64_t gHotSpotVMStructs; | |
| 260 psaddr_t sym_addr; | |
| 261 uint64_t base; | |
| 262 int err; | |
| 263 | |
| 264 err = ps_pglobal_lookup(J->P, LIBJVM_SO, "gHotSpotVMStructs", &sym_addr); | |
| 265 CHECK_FAIL(err); | |
| 266 err = read_pointer(J, sym_addr, &gHotSpotVMStructs); | |
| 267 CHECK_FAIL(err); | |
| 268 base = gHotSpotVMStructs; | |
| 269 | |
| 270 err = PS_OK; | |
| 271 while (err == PS_OK) { | |
| 272 memset(vmp, 0, sizeof(VMStructEntry)); | |
| 273 err = parse_vmstruct_entry(J, base, vmp); | |
| 274 if (err != PS_OK || vmp->typeName == NULL) { | |
| 275 break; | |
| 276 } | |
| 277 | |
| 278 if (vmp->typeName[0] == 'C' && strcmp("CodeCache", vmp->typeName) == 0) { | |
| 279 if (strcmp("_heap", vmp->fieldName) == 0) { | |
| 280 err = read_pointer(J, vmp->address, &J->CodeCache_heap_address); | |
| 281 } | |
| 282 } else if (vmp->typeName[0] == 'U' && strcmp("Universe", vmp->typeName) == 0) { | |
| 283 if (strcmp("_methodKlassObj", vmp->fieldName) == 0) { | |
| 284 J->Universe_methodKlassObj_address = vmp->address; | |
| 285 } | |
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286 if (strcmp("_narrow_oop._base", vmp->fieldName) == 0) { |
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287 J->Universe_narrow_oop_base_address = vmp->address; |
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288 } |
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289 if (strcmp("_narrow_oop._shift", vmp->fieldName) == 0) { |
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290 J->Universe_narrow_oop_shift_address = vmp->address; |
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291 } |
| 0 | 292 } |
| 293 CHECK_FAIL(err); | |
| 294 | |
| 295 base += SIZE_VMStructEntry; | |
| 296 if (vmp->typeName != NULL) free((void*)vmp->typeName); | |
| 297 if (vmp->fieldName != NULL) free((void*)vmp->fieldName); | |
| 298 } | |
| 299 | |
| 300 return PS_OK; | |
| 301 | |
| 302 fail: | |
| 303 if (vmp->typeName != NULL) free((void*)vmp->typeName); | |
| 304 if (vmp->fieldName != NULL) free((void*)vmp->fieldName); | |
| 305 return -1; | |
| 306 } | |
| 307 | |
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308 static int find_symbol(jvm_agent_t* J, const char *name, uint64_t* valuep) { |
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309 psaddr_t sym_addr; |
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310 int err; |
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311 |
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312 err = ps_pglobal_lookup(J->P, LIBJVM_SO, name, &sym_addr); |
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313 if (err != PS_OK) goto fail; |
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314 *valuep = sym_addr; |
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315 return PS_OK; |
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316 |
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317 fail: |
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318 return err; |
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319 } |
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320 |
| 0 | 321 static int read_volatiles(jvm_agent_t* J) { |
| 322 uint64_t ptr; | |
| 323 int err; | |
| 324 | |
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325 err = find_symbol(J, "UseCompressedOops", &J->Use_Compressed_Oops_address); |
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326 if (err == PS_OK) { |
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327 err = ps_pread(J->P, J->Use_Compressed_Oops_address, &J->Use_Compressed_Oops, sizeof(uint8_t)); |
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328 CHECK_FAIL(err); |
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329 } else { |
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330 J->Use_Compressed_Oops = 0; |
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331 } |
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332 |
| 0 | 333 err = read_pointer(J, J->Universe_methodKlassObj_address, &J->Universe_methodKlassObj); |
| 334 CHECK_FAIL(err); | |
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335 |
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336 err = read_pointer(J, J->Universe_narrow_oop_base_address, &J->Universe_narrow_oop_base); |
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337 CHECK_FAIL(err); |
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338 err = ps_pread(J->P, J->Universe_narrow_oop_shift_address, &J->Universe_narrow_oop_shift, sizeof(uint32_t)); |
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339 CHECK_FAIL(err); |
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340 |
| 0 | 341 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory + |
| 342 OFFSET_VirtualSpace_low, &J->CodeCache_low); | |
| 343 CHECK_FAIL(err); | |
| 344 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory + | |
| 345 OFFSET_VirtualSpace_high, &J->CodeCache_high); | |
| 346 CHECK_FAIL(err); | |
| 347 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_segmap + | |
| 348 OFFSET_VirtualSpace_low, &J->CodeCache_segmap_low); | |
| 349 CHECK_FAIL(err); | |
| 350 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_segmap + | |
| 351 OFFSET_VirtualSpace_high, &J->CodeCache_segmap_high); | |
| 352 CHECK_FAIL(err); | |
| 353 | |
| 354 err = ps_pread(J->P, J->CodeCache_heap_address + OFFSET_CodeHeap_log2_segment_size, | |
| 355 &J->SIZE_CodeCache_log2_segment, sizeof(J->SIZE_CodeCache_log2_segment)); | |
| 356 CHECK_FAIL(err); | |
| 357 | |
| 358 return PS_OK; | |
| 359 | |
| 360 fail: | |
| 361 return err; | |
| 362 } | |
| 363 | |
| 364 | |
| 365 static int codecache_contains(jvm_agent_t* J, uint64_t ptr) { | |
| 366 /* make sure the code cache is up to date */ | |
| 367 return (J->CodeCache_low <= ptr && ptr < J->CodeCache_high); | |
| 368 } | |
| 369 | |
| 370 static uint64_t segment_for(jvm_agent_t* J, uint64_t p) { | |
| 371 return (p - J->CodeCache_low) >> J->SIZE_CodeCache_log2_segment; | |
| 372 } | |
| 373 | |
| 374 static uint64_t block_at(jvm_agent_t* J, int i) { | |
| 375 return J->CodeCache_low + (i << J->SIZE_CodeCache_log2_segment); | |
| 376 } | |
| 377 | |
| 378 static int find_start(jvm_agent_t* J, uint64_t ptr, uint64_t *startp) { | |
| 379 int err; | |
| 380 | |
| 381 *startp = 0; | |
| 382 if (J->CodeCache_low <= ptr && ptr < J->CodeCache_high) { | |
| 383 int32_t used; | |
| 384 uint64_t segment = segment_for(J, ptr); | |
| 385 uint64_t block = J->CodeCache_segmap_low; | |
| 386 uint8_t tag; | |
| 387 err = ps_pread(J->P, block + segment, &tag, sizeof(tag)); | |
| 388 CHECK_FAIL(err); | |
| 389 if (tag == 0xff) | |
| 390 return PS_OK; | |
| 391 while (tag > 0) { | |
| 392 err = ps_pread(J->P, block + segment, &tag, sizeof(tag)); | |
| 393 CHECK_FAIL(err); | |
| 394 segment -= tag; | |
| 395 } | |
| 396 block = block_at(J, segment); | |
| 397 err = ps_pread(J->P, block + OFFSET_HeapBlockHeader_used, &used, sizeof(used)); | |
| 398 CHECK_FAIL(err); | |
| 399 if (used) { | |
| 400 *startp = block + SIZE_HeapBlockHeader; | |
| 401 } | |
| 402 } | |
| 403 return PS_OK; | |
| 404 | |
| 405 fail: | |
| 406 return -1; | |
| 407 } | |
| 408 | |
| 409 static int find_jlong_constant(jvm_agent_t* J, const char *name, uint64_t* valuep) { | |
| 410 psaddr_t sym_addr; | |
| 411 int err = ps_pglobal_lookup(J->P, LIBJVM_SO, name, &sym_addr); | |
| 412 if (err == PS_OK) { | |
| 413 err = ps_pread(J->P, sym_addr, valuep, sizeof(uint64_t)); | |
| 414 return err; | |
| 415 } | |
| 416 *valuep = -1; | |
| 417 return -1; | |
| 418 } | |
| 419 | |
| 420 jvm_agent_t *Jagent_create(struct ps_prochandle *P, int vers) { | |
| 421 jvm_agent_t* J; | |
| 422 int err; | |
| 423 | |
| 424 if (vers != JVM_DB_VERSION) { | |
| 425 errno = ENOTSUP; | |
| 426 return NULL; | |
| 427 } | |
| 428 | |
| 429 J = (jvm_agent_t*)calloc(sizeof(struct jvm_agent), 1); | |
| 430 | |
| 431 debug = getenv("LIBJVMDB_DEBUG") != NULL; | |
| 432 if (debug) debug = 3; | |
| 433 | |
| 434 if (debug) { | |
| 435 fprintf(stderr, "Jagent_create: debug=%d\n", debug); | |
| 436 #ifdef X86_COMPILER2 | |
| 437 fprintf(stderr, "Jagent_create: R_SP=%d, R_FP=%d, POINTER_SIZE=%d\n", R_SP, R_FP, POINTER_SIZE); | |
| 438 #endif /* X86_COMPILER2 */ | |
| 439 } | |
| 440 | |
| 441 J->P = P; | |
| 442 | |
| 443 // Initialize the initial previous frame | |
| 444 | |
| 445 J->prev_fr.fp = 0; | |
| 446 J->prev_fr.pc = 0; | |
| 447 J->prev_fr.sp = 0; | |
| 448 J->prev_fr.sender_sp = 0; | |
| 449 | |
| 450 err = find_symbol(J, "__1cHnmethodG__vtbl_", &J->nmethod_vtbl); | |
| 451 CHECK_FAIL(err); | |
| 452 err = find_symbol(J, "__1cKBufferBlobG__vtbl_", &J->BufferBlob_vtbl); | |
| 453 if (err != PS_OK) J->BufferBlob_vtbl = 0; | |
| 454 err = find_symbol(J, "__1cICodeBlobG__vtbl_", &J->CodeBlob_vtbl); | |
| 455 CHECK_FAIL(err); | |
| 456 err = find_symbol(J, "__1cLRuntimeStubG__vtbl_", &J->RuntimeStub_vtbl); | |
| 457 CHECK_FAIL(err); | |
| 458 | |
| 459 err = parse_vmstructs(J); | |
| 460 CHECK_FAIL(err); | |
| 461 err = read_volatiles(J); | |
| 462 CHECK_FAIL(err); | |
| 463 | |
| 464 return J; | |
| 465 | |
| 466 fail: | |
| 467 Jagent_destroy(J); | |
| 468 return NULL; | |
| 469 } | |
| 470 | |
| 471 void Jagent_destroy(jvm_agent_t *J) { | |
| 472 if (J != NULL) { | |
| 473 free(J); | |
| 474 } | |
| 475 } | |
| 476 | |
| 477 static int is_methodOop(jvm_agent_t* J, uint64_t methodOopPtr) { | |
| 478 uint64_t klass; | |
| 479 int err; | |
|
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480 // If UseCompressedOops, this was a compressed oop. |
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481 if (J->Use_Compressed_Oops != 0) { |
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482 uint32_t cklass; |
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483 err = read_compressed_pointer(J, methodOopPtr + OFFSET_oopDesc_metadata, |
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484 &cklass); |
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485 // decode heap oop, same as oop.inline.hpp |
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486 klass = (uint64_t)((uintptr_t)J->Universe_narrow_oop_base + |
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487 ((uintptr_t)cklass << J->Universe_narrow_oop_shift)); |
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488 } else { |
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489 err = read_pointer(J, methodOopPtr + OFFSET_oopDesc_metadata, &klass); |
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490 } |
| 0 | 491 if (err != PS_OK) goto fail; |
| 492 return klass == J->Universe_methodKlassObj; | |
| 493 | |
| 494 fail: | |
| 495 return 0; | |
| 496 } | |
| 497 | |
| 498 static int | |
| 499 name_for_methodOop(jvm_agent_t* J, uint64_t methodOopPtr, char * result, size_t size) | |
| 500 { | |
| 501 short nameIndex; | |
| 502 short signatureIndex; | |
| 503 uint64_t constantPool; | |
| 504 uint64_t constMethod; | |
| 505 uint64_t nameSymbol; | |
| 506 uint64_t signatureSymbol; | |
| 507 uint64_t klassPtr; | |
| 508 uint64_t klassSymbol; | |
| 509 short klassSymbolLength; | |
| 510 short nameSymbolLength; | |
| 511 short signatureSymbolLength; | |
| 512 char * nameString = NULL; | |
| 513 char * klassString = NULL; | |
| 514 char * signatureString = NULL; | |
| 515 int err; | |
| 516 | |
| 517 err = read_pointer(J, methodOopPtr + OFFSET_methodOopDesc_constants, &constantPool); | |
| 518 CHECK_FAIL(err); | |
| 519 err = read_pointer(J, methodOopPtr + OFFSET_methodOopDesc_constMethod, &constMethod); | |
| 520 CHECK_FAIL(err); | |
| 521 | |
| 522 /* To get name string */ | |
| 523 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_name_index, &nameIndex, 2); | |
| 524 CHECK_FAIL(err); | |
| 525 err = read_pointer(J, constantPool + nameIndex * POINTER_SIZE + SIZE_constantPoolOopDesc, &nameSymbol); | |
| 526 CHECK_FAIL(err); | |
|
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527 // The symbol is a CPSlot and has lower bit set to indicate metadata |
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528 nameSymbol &= (~1); // remove metadata lsb |
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529 err = ps_pread(J->P, nameSymbol + OFFSET_Symbol_length, &nameSymbolLength, 2); |
| 0 | 530 CHECK_FAIL(err); |
| 531 nameString = (char*)calloc(nameSymbolLength + 1, 1); | |
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532 err = ps_pread(J->P, nameSymbol + OFFSET_Symbol_body, nameString, nameSymbolLength); |
| 0 | 533 CHECK_FAIL(err); |
| 534 | |
| 535 /* To get signature string */ | |
| 536 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_signature_index, &signatureIndex, 2); | |
| 537 CHECK_FAIL(err); | |
| 538 err = read_pointer(J, constantPool + signatureIndex * POINTER_SIZE + SIZE_constantPoolOopDesc, &signatureSymbol); | |
| 539 CHECK_FAIL(err); | |
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540 signatureSymbol &= (~1); // remove metadata lsb |
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541 err = ps_pread(J->P, signatureSymbol + OFFSET_Symbol_length, &signatureSymbolLength, 2); |
| 0 | 542 CHECK_FAIL(err); |
| 543 signatureString = (char*)calloc(signatureSymbolLength + 1, 1); | |
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544 err = ps_pread(J->P, signatureSymbol + OFFSET_Symbol_body, signatureString, signatureSymbolLength); |
| 0 | 545 CHECK_FAIL(err); |
| 546 | |
| 547 /* To get klass string */ | |
| 548 err = read_pointer(J, constantPool + OFFSET_constantPoolOopDesc_pool_holder, &klassPtr); | |
| 549 CHECK_FAIL(err); | |
| 550 err = read_pointer(J, klassPtr + OFFSET_Klass_name + SIZE_oopDesc, &klassSymbol); | |
| 551 CHECK_FAIL(err); | |
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552 err = ps_pread(J->P, klassSymbol + OFFSET_Symbol_length, &klassSymbolLength, 2); |
| 0 | 553 CHECK_FAIL(err); |
| 554 klassString = (char*)calloc(klassSymbolLength + 1, 1); | |
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555 err = ps_pread(J->P, klassSymbol + OFFSET_Symbol_body, klassString, klassSymbolLength); |
| 0 | 556 CHECK_FAIL(err); |
| 557 | |
| 558 result[0] = '\0'; | |
| 559 strncat(result, klassString, size); | |
| 560 size -= strlen(klassString); | |
| 561 strncat(result, ".", size); | |
| 562 size -= 1; | |
| 563 strncat(result, nameString, size); | |
| 564 size -= strlen(nameString); | |
| 565 strncat(result, signatureString, size); | |
| 566 | |
| 567 if (nameString != NULL) free(nameString); | |
| 568 if (klassString != NULL) free(klassString); | |
| 569 if (signatureString != NULL) free(signatureString); | |
| 570 | |
| 571 return PS_OK; | |
| 572 | |
| 573 fail: | |
| 574 if (debug) { | |
| 575 fprintf(stderr, "name_for_methodOop: FAIL \n\n"); | |
| 576 } | |
| 577 if (nameString != NULL) free(nameString); | |
| 578 if (klassString != NULL) free(klassString); | |
| 579 if (signatureString != NULL) free(signatureString); | |
| 580 return -1; | |
| 581 } | |
| 582 | |
| 583 static int nmethod_info(Nmethod_t *N) | |
| 584 { | |
| 585 jvm_agent_t *J = N->J; | |
| 586 uint64_t nm = N->nm; | |
| 587 int32_t err; | |
| 588 | |
| 589 if (debug > 2 ) | |
| 590 fprintf(stderr, "\t nmethod_info: BEGIN \n"); | |
| 591 | |
| 592 /* Instructions */ | |
| 1748 | 593 err = ps_pread(J->P, nm + OFFSET_CodeBlob_code_offset, &N->instrs_beg, SZ32); |
| 0 | 594 CHECK_FAIL(err); |
| 595 err = ps_pread(J->P, nm + OFFSET_CodeBlob_data_offset, &N->instrs_end, SZ32); | |
| 596 CHECK_FAIL(err); | |
| 597 err = ps_pread(J->P, nm + OFFSET_nmethod_deoptimize_offset, &N->deopt_beg, SZ32); | |
| 598 CHECK_FAIL(err); | |
| 599 err = ps_pread(J->P, nm + OFFSET_nmethod_orig_pc_offset, &N->orig_pc_offset, SZ32); | |
| 600 CHECK_FAIL(err); | |
| 601 | |
| 602 /* Oops */ | |
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603 err = ps_pread(J->P, nm + OFFSET_nmethod_oops_offset, &N->oops_beg, SZ32); |
| 0 | 604 CHECK_FAIL(err); |
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605 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_data_offset, &N->oops_end, SZ32); |
| 0 | 606 CHECK_FAIL(err); |
| 607 | |
| 608 /* scopes_pcs */ | |
| 609 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_pcs_offset, &N->scopes_pcs_beg, SZ32); | |
| 610 CHECK_FAIL(err); | |
| 611 err = ps_pread(J->P, nm + OFFSET_nmethod_handler_table_offset, &N->scopes_pcs_end, SZ32); | |
| 612 CHECK_FAIL(err); | |
| 613 | |
| 614 /* scopes_data */ | |
| 615 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_data_offset, &N->scopes_data_beg, SZ32); | |
| 616 CHECK_FAIL(err); | |
| 617 | |
| 618 if (debug > 2 ) { | |
| 619 N->scopes_data_end = N->scopes_pcs_beg; | |
| 620 | |
| 621 fprintf(stderr, "\t nmethod_info: instrs_beg: %#x, instrs_end: %#x\n", | |
| 622 N->instrs_beg, N->instrs_end); | |
| 623 | |
| 624 fprintf(stderr, "\t nmethod_info: deopt_beg: %#x \n", | |
| 625 N->deopt_beg); | |
| 626 | |
| 627 fprintf(stderr, "\t nmethod_info: orig_pc_offset: %#x \n", | |
| 628 N->orig_pc_offset); | |
| 629 | |
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630 fprintf(stderr, "\t nmethod_info: oops_beg: %#x, oops_end: %#x\n", |
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631 N->oops_beg, N->oops_end); |
| 0 | 632 |
| 633 fprintf(stderr, "\t nmethod_info: scopes_data_beg: %#x, scopes_data_end: %#x\n", | |
| 634 N->scopes_data_beg, N->scopes_data_end); | |
| 635 | |
| 636 fprintf(stderr, "\t nmethod_info: scopes_pcs_beg: %#x, scopes_pcs_end: %#x\n", | |
| 637 N->scopes_pcs_beg, N->scopes_pcs_end); | |
| 638 | |
| 639 fprintf(stderr, "\t nmethod_info: END \n\n"); | |
| 640 } | |
| 641 return PS_OK; | |
| 642 | |
| 643 fail: | |
| 644 return err; | |
| 645 } | |
| 646 | |
| 647 static int | |
| 648 raw_read_int(jvm_agent_t* J, uint64_t *buffer, int32_t *val) | |
| 649 { | |
| 650 int shift = 0; | |
| 651 int value = 0; | |
| 652 uint8_t ch = 0; | |
| 653 int32_t err; | |
| 654 int32_t sum; | |
| 655 // Constants for UNSIGNED5 coding of Pack200 | |
| 656 // see compressedStream.hpp | |
| 657 enum { | |
| 658 lg_H = 6, | |
| 659 H = 1<<lg_H, | |
| 660 BitsPerByte = 8, | |
| 661 L = (1<<BitsPerByte)-H, | |
| 662 }; | |
| 663 int i; | |
| 664 | |
| 665 err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t)); | |
| 666 CHECK_FAIL(err); | |
| 667 if (debug > 2) | |
| 668 fprintf(stderr, "\t\t\t raw_read_int: *buffer: %#llx, ch: %#x\n", *buffer, ch); | |
| 669 | |
| 670 sum = ch; | |
| 671 if ( sum >= L ) { | |
| 672 int32_t lg_H_i = lg_H; | |
| 673 // Read maximum of 5 total bytes (we've already read 1). | |
| 674 // See CompressedReadStream::read_int_mb | |
| 675 for ( i = 0; i < 4; i++) { | |
| 676 err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t)); | |
| 677 CHECK_FAIL(err); | |
| 678 sum += ch << lg_H_i; | |
| 679 if (ch < L ) { | |
| 680 *val = sum; | |
| 681 return PS_OK; | |
| 682 } | |
| 683 lg_H_i += lg_H; | |
| 684 } | |
| 685 } | |
| 686 *val = sum; | |
| 687 return PS_OK; | |
| 688 | |
| 689 fail: | |
| 690 return err; | |
| 691 } | |
| 692 | |
| 693 static int | |
| 694 read_pair(jvm_agent_t* J, uint64_t *buffer, int32_t *bci, int32_t *line) | |
| 695 { | |
| 696 uint8_t next = 0; | |
| 697 int32_t bci_delta; | |
| 698 int32_t line_delta; | |
| 699 int32_t err; | |
| 700 | |
| 701 if (debug > 2) | |
| 702 fprintf(stderr, "\t\t read_pair: BEGIN\n"); | |
| 703 | |
| 704 err = ps_pread(J->P, (*buffer)++, &next, sizeof(uint8_t)); | |
| 705 CHECK_FAIL(err); | |
| 706 | |
| 707 if (next == 0) { | |
| 708 if (debug > 2) | |
| 709 fprintf(stderr, "\t\t read_pair: END: next == 0\n"); | |
| 710 return 1; /* stream terminated */ | |
| 711 } | |
| 712 if (next == 0xFF) { | |
| 713 if (debug > 2) | |
| 714 fprintf(stderr, "\t\t read_pair: END: next == 0xFF\n"); | |
| 715 | |
| 716 /* Escape character, regular compression used */ | |
| 717 | |
| 718 err = raw_read_int(J, buffer, &bci_delta); | |
| 719 CHECK_FAIL(err); | |
| 720 | |
| 721 err = raw_read_int(J, buffer, &line_delta); | |
| 722 CHECK_FAIL(err); | |
| 723 | |
| 724 *bci += bci_delta; | |
| 725 *line += line_delta; | |
| 726 | |
| 727 if (debug > 2) { | |
| 728 fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n", | |
| 729 line_delta, bci_delta); | |
| 730 fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n", | |
| 731 *line, *bci); | |
| 732 } | |
| 733 } else { | |
| 734 /* Single byte compression used */ | |
| 735 *bci += next >> 3; | |
| 736 *line += next & 0x7; | |
| 737 if (debug > 2) { | |
| 738 fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n", | |
| 739 next & 0x7, next >> 3); | |
| 740 fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n", | |
| 741 *line, *bci); | |
| 742 } | |
| 743 } | |
| 744 if (debug > 2) | |
| 745 fprintf(stderr, "\t\t read_pair: END\n"); | |
| 746 return PS_OK; | |
| 747 | |
| 748 fail: | |
| 749 if (debug) | |
| 750 fprintf(stderr, "\t\t read_pair: FAIL\n"); | |
| 751 return err; | |
| 752 } | |
| 753 | |
| 754 static int | |
| 755 line_number_from_bci(jvm_agent_t* J, Vframe_t *vf) | |
| 756 { | |
| 757 uint64_t buffer; | |
| 758 uint16_t code_size; | |
| 759 uint64_t code_end_delta; | |
| 760 uint64_t constMethod; | |
| 761 int8_t access_flags; | |
| 762 int32_t best_bci = 0; | |
| 763 int32_t stream_bci = 0; | |
| 764 int32_t stream_line = 0; | |
| 765 int32_t err; | |
| 766 | |
| 767 if (debug > 2) { | |
| 768 char name[256]; | |
| 769 err = name_for_methodOop(J, vf->methodOop, name, 256); | |
| 770 CHECK_FAIL(err); | |
| 771 fprintf(stderr, "\t line_number_from_bci: BEGIN, method name: %s, targ bci: %d\n", | |
| 772 name, vf->bci); | |
| 773 } | |
| 774 | |
| 775 err = read_pointer(J, vf->methodOop + OFFSET_methodOopDesc_constMethod, &constMethod); | |
| 776 CHECK_FAIL(err); | |
| 777 | |
| 778 vf->line = 0; | |
| 779 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_flags, &access_flags, sizeof(int8_t)); | |
| 780 CHECK_FAIL(err); | |
| 781 | |
| 782 if (!(access_flags & constMethodOopDesc_has_linenumber_table)) { | |
| 783 if (debug > 2) | |
| 784 fprintf(stderr, "\t line_number_from_bci: END: !HAS_LINE_NUMBER_TABLE \n\n"); | |
| 785 return PS_OK; | |
| 786 } | |
| 787 | |
| 788 /* The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
| 789 * Not necessarily sorted and not necessarily one-to-one. | |
| 790 */ | |
| 791 | |
| 792 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_code_size, &code_size, SZ16); | |
| 793 CHECK_FAIL(err); | |
| 794 | |
| 795 /* inlined_table_start() */ | |
| 796 code_end_delta = (uint64_t) (access_flags & AccessFlags_NATIVE) ? 2*POINTER_SIZE : 0; | |
| 797 buffer = constMethod + (uint64_t) SIZE_constMethodOopDesc + (uint64_t) code_size + code_end_delta; | |
| 798 | |
| 799 if (debug > 2) { | |
| 800 fprintf(stderr, "\t\t line_number_from_bci: methodOop: %#llx, native: %d\n", | |
| 801 vf->methodOop, (access_flags & AccessFlags_NATIVE)); | |
| 802 fprintf(stderr, "\t\t line_number_from_bci: buffer: %#llx, code_size: %d\n", | |
| 803 buffer, (int) code_size); | |
| 804 } | |
| 805 | |
| 806 while (read_pair(J, &buffer, &stream_bci, &stream_line) == 0) { | |
| 807 if (stream_bci == vf->bci) { | |
| 808 /* perfect match */ | |
| 809 if (debug > 2) | |
| 810 fprintf(stderr, "\t line_number_from_bci: END: exact line: %ld \n\n", vf->line); | |
| 811 vf->line = stream_line; | |
| 812 return PS_OK; | |
| 813 } else { | |
| 814 /* update best_bci/line */ | |
| 815 if (stream_bci < vf->bci && stream_bci >= best_bci) { | |
| 816 best_bci = stream_bci; | |
| 817 vf->line = stream_line; | |
| 818 if (debug > 2) { | |
| 819 fprintf(stderr, "\t line_number_from_bci: best_bci: %ld, best_line: %ld\n", | |
| 820 best_bci, vf->line); | |
| 821 } | |
| 822 } | |
| 823 } | |
| 824 } | |
| 825 if (debug > 2) | |
| 826 fprintf(stderr, "\t line_number_from_bci: END: line: %ld \n\n", vf->line); | |
| 827 return PS_OK; | |
| 828 | |
| 829 fail: | |
| 830 if (debug) | |
| 831 fprintf(stderr, "\t line_number_from_bci: FAIL\n"); | |
| 832 return err; | |
| 833 } | |
| 834 | |
| 835 static int | |
| 836 get_real_pc(Nmethod_t *N, uint64_t pc_desc, uint64_t *real_pc) | |
| 837 { | |
| 838 int32_t pc_offset; | |
| 839 int32_t err; | |
| 840 | |
| 841 err = ps_pread(N->J->P, pc_desc + OFFSET_PcDesc_pc_offset, &pc_offset, SZ32); | |
| 842 CHECK_FAIL(err); | |
| 843 | |
| 844 *real_pc = N->nm + N->instrs_beg + pc_offset; | |
| 845 if (debug > 2) { | |
| 846 fprintf(stderr, "\t\t get_real_pc: pc_offset: %lx, real_pc: %llx\n", | |
| 847 pc_offset, *real_pc); | |
| 848 } | |
| 849 return PS_OK; | |
| 850 | |
| 851 fail: | |
| 852 return err; | |
| 853 } | |
| 854 | |
| 855 /* Finds a PcDesc with real-pc equal to N->pc */ | |
| 856 static int pc_desc_at(Nmethod_t *N) | |
| 857 { | |
| 858 uint64_t pc_diff; | |
| 859 int32_t offs; | |
| 860 int32_t err; | |
| 861 | |
| 862 if (debug > 2) | |
| 863 fprintf(stderr, "\t pc_desc_at: BEGIN\n"); | |
| 864 | |
| 865 N->vf_cnt = 0; | |
| 866 N->pc_desc = 0; | |
| 867 | |
| 868 for (offs = N->scopes_pcs_beg; offs < N->scopes_pcs_end; offs += SIZE_PcDesc) { | |
| 869 uint64_t pd; | |
| 870 uint64_t best_pc_diff = 16; /* some approximation */ | |
| 871 uint64_t real_pc = 0; | |
| 872 | |
| 873 pd = N->nm + offs; | |
| 874 err = get_real_pc(N, pd, &real_pc); | |
| 875 CHECK_FAIL(err); | |
| 876 | |
| 877 pc_diff = real_pc - N->pc; | |
| 878 | |
| 879 /* In general, this fragment should work */ | |
| 880 if (pc_diff == 0) { | |
| 881 N->pc_desc = pd; | |
| 882 if (debug) { | |
| 883 fprintf(stderr, "\t pc_desc_at: END: pc_desc: FOUND: %#lx \n\n", pd); | |
| 884 } | |
| 885 return PS_OK; | |
| 886 } | |
| 887 /* This fragment is to be able to find out an appropriate | |
| 888 * pc_desc entry even if pc_desc info is inaccurate. | |
| 889 */ | |
| 890 if (best_pc_diff > pc_diff && pc_diff > 0) { | |
| 891 best_pc_diff = pc_diff; | |
| 892 N->pc_desc = pd; | |
| 893 } | |
| 894 } | |
| 895 if (debug) { | |
| 896 fprintf(stderr, "\t pc_desc_at: END: pc_desc NOT FOUND"); | |
| 897 if (pc_diff < 20) | |
| 898 fprintf(stderr, ", best pc_diff: %d\n\n", pc_diff); | |
| 899 else | |
| 900 fprintf(stderr, "\n\n"); | |
| 901 } | |
| 902 return PS_OK; | |
| 903 | |
| 904 fail: | |
| 905 return err; | |
| 906 } | |
| 907 | |
| 908 static int | |
| 909 scope_desc_at(Nmethod_t *N, int32_t decode_offset, Vframe_t *vf) | |
| 910 { | |
| 911 uint64_t buffer; | |
| 912 int32_t err; | |
| 913 | |
| 914 if (debug > 2) { | |
| 915 fprintf(stderr, "\t\t scope_desc_at: BEGIN \n"); | |
| 916 } | |
| 917 | |
| 918 buffer = N->nm + N->scopes_data_beg + decode_offset; | |
| 919 | |
| 920 err = raw_read_int(N->J, &buffer, &vf->sender_decode_offset); | |
| 921 CHECK_FAIL(err); | |
| 922 | |
| 923 err = raw_read_int(N->J, &buffer, &vf->methodIdx); | |
| 924 CHECK_FAIL(err); | |
| 925 | |
| 926 err = raw_read_int(N->J, &buffer, &vf->bci); | |
| 927 CHECK_FAIL(err); | |
| 928 | |
| 929 if (debug > 2) { | |
| 930 fprintf(stderr, "\t\t scope_desc_at: sender_decode_offset: %#x\n", | |
| 931 vf->sender_decode_offset); | |
| 932 fprintf(stderr, "\t\t scope_desc_at: methodIdx: %d\n", vf->methodIdx); | |
| 933 fprintf(stderr, "\t\t scope_desc_at: bci: %d\n", vf->bci); | |
| 934 | |
| 935 fprintf(stderr, "\t\t scope_desc_at: END \n\n"); | |
| 936 } | |
| 937 return PS_OK; | |
| 938 | |
| 939 fail: | |
| 940 return err; | |
| 941 } | |
| 942 | |
|
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943 static int scopeDesc_chain(Nmethod_t *N) { |
| 0 | 944 int32_t decode_offset = 0; |
| 945 int32_t err; | |
| 946 | |
|
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947 if (debug > 2) { |
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948 fprintf(stderr, "\t scopeDesc_chain: BEGIN\n"); |
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949 } |
| 0 | 950 |
| 951 err = ps_pread(N->J->P, N->pc_desc + OFFSET_PcDesc_scope_decode_offset, | |
| 952 &decode_offset, SZ32); | |
| 953 CHECK_FAIL(err); | |
| 954 | |
| 955 while (decode_offset > 0) { | |
|
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956 Vframe_t *vf = &N->vframes[N->vf_cnt]; |
| 0 | 957 |
|
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958 if (debug > 2) { |
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959 fprintf(stderr, "\t scopeDesc_chain: decode_offset: %#x\n", decode_offset); |
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960 } |
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961 |
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962 err = scope_desc_at(N, decode_offset, vf); |
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963 CHECK_FAIL(err); |
| 0 | 964 |
|
1563
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965 if (vf->methodIdx > ((N->oops_end - N->oops_beg) / POINTER_SIZE)) { |
|
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966 fprintf(stderr, "\t scopeDesc_chain: (methodIdx > oops length) !\n"); |
|
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967 return -1; |
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968 } |
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969 err = read_pointer(N->J, N->nm + N->oops_beg + (vf->methodIdx-1)*POINTER_SIZE, |
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970 &vf->methodOop); |
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971 CHECK_FAIL(err); |
| 0 | 972 |
|
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973 if (vf->methodOop) { |
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974 N->vf_cnt++; |
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975 err = line_number_from_bci(N->J, vf); |
| 0 | 976 CHECK_FAIL(err); |
|
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977 if (debug > 2) { |
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978 fprintf(stderr, "\t scopeDesc_chain: methodOop: %#8llx, line: %ld\n", |
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979 vf->methodOop, vf->line); |
| 0 | 980 } |
|
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981 } |
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982 decode_offset = vf->sender_decode_offset; |
| 0 | 983 } |
|
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984 if (debug > 2) { |
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985 fprintf(stderr, "\t scopeDesc_chain: END \n\n"); |
|
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|
986 } |
| 0 | 987 return PS_OK; |
| 988 | |
| 989 fail: | |
|
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990 if (debug) { |
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991 fprintf(stderr, "\t scopeDesc_chain: FAIL \n\n"); |
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|
992 } |
| 0 | 993 return err; |
| 994 } | |
| 995 | |
| 996 | |
| 997 static int | |
| 998 name_for_nmethod(jvm_agent_t* J, | |
| 999 uint64_t nm, | |
| 1000 uint64_t pc, | |
| 1001 uint64_t methodOop, | |
| 1002 char *result, | |
| 1003 size_t size, | |
| 1004 Jframe_t *jframe | |
| 1005 ) { | |
| 1006 Nmethod_t *N; | |
| 1007 Vframe_t *vf; | |
| 1008 int32_t err; | |
| 1009 int deoptimized = 0; | |
| 1010 | |
| 1011 if (debug) { | |
| 1012 fprintf(stderr, "name_for_nmethod: BEGIN: nmethod: %#llx, pc: %#llx\n", nm, pc); | |
| 1013 } | |
| 1014 if (J->N == NULL) { | |
| 1015 J->N = (Nmethod_t *) malloc(sizeof(Nmethod_t)); | |
| 1016 } | |
| 1017 memset(J->N, 0, sizeof(Nmethod_t)); /* Initial stat: all values are zeros */ | |
| 1018 N = J->N; | |
| 1019 N->J = J; | |
| 1020 N->nm = nm; | |
| 1021 N->pc = pc; | |
| 1022 N->jframe = jframe; | |
| 1023 | |
| 1024 err = nmethod_info(N); | |
| 1025 CHECK_FAIL(err); | |
| 1026 if (debug) { | |
| 1027 fprintf(stderr, "name_for_nmethod: pc: %#llx, deopt_pc: %#llx\n", | |
| 1028 pc, N->nm + N->deopt_beg); | |
| 1029 } | |
| 1030 | |
| 1031 /* check for a deoptimized frame */ | |
| 1032 if ( pc == N->nm + N->deopt_beg) { | |
| 1033 uint64_t base; | |
| 1034 if (debug) { | |
| 1035 fprintf(stderr, "name_for_nmethod: found deoptimized frame\n"); | |
| 1036 } | |
| 1037 if (J->prev_fr.sender_sp != 0) { | |
| 1038 base = J->prev_fr.sender_sp + N->orig_pc_offset; | |
| 1039 } else { | |
| 1040 base = J->curr_fr.sp + N->orig_pc_offset; | |
| 1041 } | |
| 1042 err = read_pointer(J, base, &N->pc); | |
| 1043 CHECK_FAIL(err); | |
| 1044 if (debug) { | |
| 1045 fprintf(stderr, "name_for_nmethod: found deoptimized frame converting pc from %#8llx to %#8llx\n", | |
| 1046 pc, N->pc); | |
| 1047 } | |
| 1048 deoptimized = 1; | |
| 1049 } | |
| 1050 | |
| 1051 err = pc_desc_at(N); | |
| 1052 CHECK_FAIL(err); | |
| 1053 | |
| 1054 if (N->pc_desc > 0) { | |
| 1055 jframe->locinf = 1; | |
| 1056 err = scopeDesc_chain(N); | |
| 1057 CHECK_FAIL(err); | |
| 1058 } | |
| 1059 result[0] = COMP_METHOD_SIGN; | |
| 1060 vf = &N->vframes[0]; | |
| 1061 if (N->vf_cnt > 0) { | |
| 1062 jframe->vf_cnt = N->vf_cnt; | |
| 1063 jframe->bci = vf->bci; | |
| 1064 jframe->line = vf->line; | |
| 1065 err = name_for_methodOop(J, N->vframes[0].methodOop, result+1, size-1); | |
| 1066 CHECK_FAIL(err); | |
| 1067 } else { | |
| 1068 err = name_for_methodOop(J, methodOop, result+1, size-1); | |
| 1069 CHECK_FAIL(err); | |
| 1070 } | |
| 1071 if (deoptimized) { | |
| 1072 strncat(result + 1, " [deoptimized frame]; ", size-1); | |
| 1073 } else { | |
| 1074 strncat(result + 1, " [compiled] ", size-1); | |
| 1075 } | |
| 1076 if (debug) | |
| 1077 fprintf(stderr, "name_for_nmethod: END: method name: %s, vf_cnt: %d\n\n", | |
| 1078 result, N->vf_cnt); | |
| 1079 return PS_OK; | |
| 1080 | |
| 1081 fail: | |
| 1082 if (debug) | |
| 1083 fprintf(stderr, "name_for_nmethod: FAIL \n\n"); | |
| 1084 return err; | |
| 1085 } | |
| 1086 | |
| 1087 int is_bci(intptr_t bcx) { | |
| 1088 switch (DATA_MODEL) { | |
| 1089 case PR_MODEL_LP64: | |
| 1090 return ((uintptr_t) bcx) <= ((uintptr_t) MAX_METHOD_CODE_SIZE) ; | |
| 1091 case PR_MODEL_ILP32: | |
| 1092 default: | |
| 1093 return 0 <= bcx && bcx <= MAX_METHOD_CODE_SIZE; | |
| 1094 } | |
| 1095 } | |
| 1096 | |
| 1097 static int | |
| 1098 name_for_imethod(jvm_agent_t* J, | |
| 1099 uint64_t bcx, | |
| 1100 uint64_t methodOop, | |
| 1101 char *result, | |
| 1102 size_t size, | |
| 1103 Jframe_t *jframe | |
| 1104 ) { | |
| 1105 uint64_t bci; | |
| 1106 uint64_t constMethod; | |
| 1107 Vframe_t vframe = {0}; | |
| 1108 Vframe_t *vf = &vframe; | |
| 1109 int32_t err; | |
| 1110 | |
| 1111 err = read_pointer(J, methodOop + OFFSET_methodOopDesc_constMethod, &constMethod); | |
| 1112 CHECK_FAIL(err); | |
| 1113 | |
| 1114 bci = is_bci(bcx) ? bcx : bcx - (constMethod + (uint64_t) SIZE_constMethodOopDesc); | |
| 1115 | |
| 1116 if (debug) | |
| 1117 fprintf(stderr, "\t name_for_imethod: BEGIN: methodOop: %#llx\n", methodOop); | |
| 1118 | |
| 1119 err = name_for_methodOop(J, methodOop, result, size); | |
| 1120 CHECK_FAIL(err); | |
| 1121 if (debug) | |
| 1122 fprintf(stderr, "\t name_for_imethod: method name: %s\n", result); | |
| 1123 | |
| 1124 if (bci > 0) { | |
| 1125 vf->methodOop = methodOop; | |
| 1126 vf->bci = bci; | |
| 1127 err = line_number_from_bci(J, vf); | |
| 1128 CHECK_FAIL(err); | |
| 1129 } | |
| 1130 jframe->bci = vf->bci; | |
| 1131 jframe->line = vf->line; | |
| 1132 jframe->locinf = 1; | |
| 1133 | |
| 1134 if (debug) { | |
| 1135 fprintf(stderr, "\t name_for_imethod: END: bci: %d, line: %d\n\n", | |
| 1136 vf->bci, vf->line); | |
| 1137 } | |
| 1138 return PS_OK; | |
| 1139 | |
| 1140 fail: | |
| 1141 if (debug) | |
| 1142 fprintf(stderr, "\t name_for_imethod: FAIL\n"); | |
| 1143 return err; | |
| 1144 } | |
| 1145 | |
| 1146 static int | |
| 1147 name_for_codecache(jvm_agent_t* J, uint64_t fp, uint64_t pc, char * result, | |
| 1148 size_t size, Jframe_t *jframe, int* is_interpreted) | |
| 1149 { | |
| 1150 uint64_t start; | |
| 1151 uint64_t vtbl; | |
| 1152 int32_t err; | |
| 1153 *is_interpreted = 0; | |
| 1154 | |
| 1155 result[0] = '\0'; | |
| 1156 | |
| 1157 err = find_start(J, pc, &start); | |
| 1158 CHECK_FAIL(err); | |
| 1159 | |
| 1160 err = read_pointer(J, start, &vtbl); | |
| 1161 CHECK_FAIL(err); | |
| 1162 | |
| 1163 if (vtbl == J->nmethod_vtbl) { | |
| 1164 uint64_t methodOop; | |
| 1165 | |
| 1166 err = read_pointer(J, start + OFFSET_nmethod_method, &methodOop); | |
| 1167 CHECK_FAIL(err); | |
| 1168 | |
| 1169 if (debug) { | |
| 1170 fprintf(stderr, "name_for_codecache: start: %#8llx, pc: %#8llx, methodOop: %#8llx \n", | |
| 1171 start, pc, methodOop); | |
| 1172 } | |
| 1173 err = name_for_nmethod(J, start, pc, methodOop, result, size, jframe); | |
| 1174 CHECK_FAIL(err); | |
| 1175 } else if (vtbl == J->BufferBlob_vtbl) { | |
| 1176 const char * name; | |
| 1177 | |
| 1178 err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name); | |
| 1179 | |
| 1180 /* | |
| 1181 * Temporary usage of string "Interpreter". | |
| 1182 * We need some other way to distinguish "StubRoutines" | |
| 1183 * and regular interpreted frames. | |
| 1184 */ | |
| 1185 if (err == PS_OK && strncmp(name, "Interpreter", 11) == 0) { | |
| 1186 *is_interpreted = 1; | |
| 1187 if (is_methodOop(J, J->methodOopPtr)) { | |
| 1188 return name_for_imethod(J, J->bcx, J->methodOopPtr, result, size, jframe); | |
| 1189 } | |
| 1190 } | |
| 1191 | |
| 1192 if (err == PS_OK) { | |
| 1193 strncpy(result, name, size); | |
| 1194 free((void*)name); | |
| 1195 } else { | |
| 1196 strncpy(result, "<unknown BufferBlob>", size); | |
| 1197 } | |
| 1198 /* return PS_OK; */ | |
| 1199 } else { | |
| 1200 const char * name; | |
| 1201 | |
| 1202 err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name); | |
| 1203 if (err == PS_OK) { | |
| 1204 strncpy(result, name, size); | |
| 1205 free((void*)name); | |
| 1206 } else { | |
| 1207 strncpy(result, "<unknown CodeBlob>", size); | |
| 1208 WARN1("unknown CodeBlob: vtbl = 0x%x", vtbl); | |
| 1209 } | |
| 1210 } | |
| 1211 result[size-1] = '\0'; | |
| 1212 | |
| 1213 #ifdef X86_COMPILER2 | |
| 1214 if (vtbl != J->RuntimeStub_vtbl) { | |
| 1215 uint64_t trial_pc; | |
| 1216 int frame_size; | |
| 1217 err = ps_pread(J->P, start + OFFSET_CodeBlob_frame_size, | |
| 1218 &frame_size, SZ32); | |
| 1219 CHECK_FAIL(err); | |
| 1220 | |
| 1221 // frame_size is in words, we want bytes. | |
| 1222 frame_size *= POINTER_SIZE; /* word => byte conversion */ | |
| 1223 | |
| 1224 /* | |
| 1225 Because c2 doesn't use FP as a framepointer the value of sp/fp we receive | |
| 1226 in the initial entry to a set of stack frames containing server frames | |
| 1227 will pretty much be nonsense. We can detect that nonsense by looking to | |
| 1228 see if the PC we received is correct if we look at the expected storage | |
| 1229 location in relation to the FP (ie. POINTER_SIZE(FP) ) | |
| 1230 */ | |
| 1231 | |
| 1232 err = read_pointer(J, fp + POINTER_SIZE , &trial_pc); | |
| 1233 if ( (err != PS_OK || trial_pc != pc) && frame_size > 0 ) { | |
| 1234 // Either we couldn't even read at the "fp" or the pc didn't match | |
| 1235 // both are sure clues that the fp is bogus. We no search the stack | |
| 1236 // for a reasonable number of words trying to find the bogus fp | |
| 1237 // and the current pc in adjacent words. The we will be able to | |
| 1238 // deduce an approximation of the frame pointer and actually get | |
| 1239 // the correct stack pointer. Which we can then unwind for the | |
| 1240 // next frame. | |
| 1241 int i; | |
| 1242 uint64_t check; | |
| 1243 uint64_t base = J->curr_fr.sp; | |
| 1244 uint64_t prev_fp = 0; | |
| 1245 for ( i = 0; i < frame_size * 5 ; i++, base += POINTER_SIZE ) { | |
| 1246 err = read_pointer(J, base , &check); | |
| 1247 CHECK_FAIL(err); | |
| 1248 if (check == fp) { | |
| 1249 base += POINTER_SIZE; | |
| 1250 err = read_pointer(J, base , &check); | |
| 1251 CHECK_FAIL(err); | |
| 1252 if (check == pc) { | |
| 1253 if (debug) { | |
| 1254 fprintf(stderr, "name_for_codecache: found matching fp/pc combo at 0x%llx\n", base - POINTER_SIZE); | |
| 1255 } | |
| 1256 prev_fp = base - 2 * POINTER_SIZE; | |
| 1257 break; | |
| 1258 } | |
| 1259 } | |
| 1260 } | |
| 1261 if ( prev_fp != 0 ) { | |
| 1262 // real_sp is the sp we should have received for this frame | |
| 1263 uint64_t real_sp = prev_fp + 2 * POINTER_SIZE; | |
| 1264 // +POINTER_SIZE because callee owns the return address so caller's sp is +1 word | |
| 1265 jframe->new_sp = real_sp + frame_size + POINTER_SIZE; | |
| 1266 err = read_pointer(J, jframe->new_sp - POINTER_SIZE , &jframe->new_pc); | |
| 1267 CHECK_FAIL(err); | |
| 1268 err = read_pointer(J, jframe->new_sp - 2*POINTER_SIZE, &jframe->new_fp); | |
| 1269 CHECK_FAIL(err); | |
| 1270 return PS_OK; | |
| 1271 } | |
| 1272 } | |
| 1273 | |
| 1274 /* A prototype to workaround FP absence */ | |
| 1275 /* | |
| 1276 * frame_size can be 0 for StubRoutines (1) frame. | |
| 1277 * In this case it should work with fp as usual. | |
| 1278 */ | |
| 1279 if (frame_size > 0) { | |
| 1280 jframe->new_fp = J->prev_fr.fp + frame_size; | |
| 1281 jframe->new_sp = jframe->new_fp + 2 * POINTER_SIZE; | |
| 1282 } else { | |
| 1283 memset(&J->curr_fr, 0, sizeof(Frame_t)); | |
| 1284 err = read_pointer(J, fp, &jframe->new_fp); | |
| 1285 CHECK_FAIL(err); | |
| 1286 | |
| 1287 err = read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc); | |
| 1288 CHECK_FAIL(err); | |
| 1289 } | |
| 1290 if (debug) { | |
| 1291 fprintf(stderr, "name_for_codecache: %s, frame_size=%#lx\n", | |
| 1292 result, frame_size); | |
| 1293 fprintf(stderr, "name_for_codecache: prev_fr.fp=%#lx, fp=%#lx\n", | |
| 1294 J->prev_fr.fp, jframe->new_fp); | |
| 1295 } | |
| 1296 } | |
| 1297 #endif /* X86_COMPILER2 */ | |
| 1298 | |
| 1299 return PS_OK; | |
| 1300 | |
| 1301 fail: | |
| 1302 return err; | |
| 1303 } | |
| 1304 | |
| 1305 int Jget_vframe(jvm_agent_t* J, int vframe_no, | |
| 1306 char *name, size_t size, Jframe_t *jframe) | |
| 1307 { | |
| 1308 Nmethod_t *N = J->N; | |
| 1309 Vframe_t *vf; | |
| 1310 int32_t err; | |
| 1311 | |
| 1312 if (vframe_no >= N->vf_cnt) { | |
| 1313 (void) sprintf(name, "Wrong inlinedMethod%1d()", vframe_no); | |
| 1314 return -1; | |
| 1315 } | |
| 1316 vf = N->vframes + vframe_no; | |
| 1317 name[0] = COMP_METHOD_SIGN; | |
| 1318 err = name_for_methodOop(J, vf->methodOop, name + 1, size); | |
| 1319 CHECK_FAIL(err); | |
| 1320 | |
| 1321 jframe->bci = vf->bci; | |
| 1322 jframe->line = vf->line; | |
| 1323 if (debug) { | |
| 1324 fprintf(stderr, "\t Jget_vframe: method name: %s, line: %ld\n", | |
| 1325 name, vf->line); | |
| 1326 } | |
| 1327 return PS_OK; | |
| 1328 | |
| 1329 fail: | |
| 1330 if (debug) { | |
| 1331 fprintf(stderr, "\t Jget_vframe: FAIL\n"); | |
| 1332 } | |
| 1333 return err; | |
| 1334 } | |
| 1335 | |
| 1336 #define MAX_SYM_SIZE 256 | |
| 1337 | |
| 1338 int Jlookup_by_regs(jvm_agent_t* J, const prgregset_t regs, char *name, | |
| 1339 size_t size, Jframe_t *jframe) { | |
| 1340 uintptr_t fp; | |
| 1341 uintptr_t pc; | |
| 1342 /* arguments given to read_pointer need to be worst case sized */ | |
| 1343 uint64_t methodOopPtr = 0; | |
| 1344 uint64_t sender_sp; | |
| 1345 uint64_t bcx = 0; | |
| 1346 int is_interpreted = 0; | |
| 1347 int result = PS_OK; | |
| 1348 int err = PS_OK; | |
| 1349 | |
| 1350 if (J == NULL) { | |
| 1351 return -1; | |
| 1352 } | |
| 1353 | |
| 1354 jframe->vf_cnt = 1; | |
| 1355 jframe->new_fp = 0; | |
| 1356 jframe->new_pc = 0; | |
| 1357 jframe->line = 0; | |
| 1358 jframe->bci = 0; | |
| 1359 jframe->locinf = 0; | |
| 1360 | |
| 1361 read_volatiles(J); | |
| 1362 pc = (uintptr_t) regs[R_PC]; | |
| 1363 J->curr_fr.pc = pc; | |
| 1364 J->curr_fr.fp = regs[R_FP]; | |
| 1365 J->curr_fr.sp = regs[R_SP]; | |
| 1366 | |
| 1367 if (debug) | |
| 1368 fprintf(stderr, "Jlookup_by_regs: BEGINs: fp=%#lx, pc=%#lx\n", regs[R_FP], pc); | |
| 1369 | |
| 1370 #if defined(sparc) || defined(__sparc) | |
| 1371 /* The following workaround is for SPARC. CALL instruction occupates 8 bytes. | |
| 1372 * In the pcDesc structure return pc offset is recorded for CALL instructions. | |
| 1373 * regs[R_PC] contains a CALL instruction pc offset. | |
| 1374 */ | |
| 1375 pc += 8; | |
| 1376 bcx = (uintptr_t) regs[R_L1]; | |
| 1377 methodOopPtr = (uintptr_t) regs[R_L2]; | |
| 1378 sender_sp = regs[R_I5]; | |
| 1379 if (debug > 2) { | |
| 1380 fprintf(stderr, "\nregs[R_I1]=%lx, regs[R_I2]=%lx, regs[R_I5]=%lx, regs[R_L1]=%lx, regs[R_L2]=%lx\n", | |
| 1381 regs[R_I1], regs[R_I2], regs[R_I5], regs[R_L1], regs[R_L2]); | |
| 1382 } | |
| 1383 #elif defined(i386) || defined(__i386) || defined(__amd64) | |
| 1384 | |
| 1385 fp = (uintptr_t) regs[R_FP]; | |
| 1386 if (J->prev_fr.fp == 0) { | |
| 1387 #ifdef X86_COMPILER2 | |
| 1388 /* A workaround for top java frames */ | |
| 1389 J->prev_fr.fp = (uintptr_t)(regs[R_SP] - 2 * POINTER_SIZE); | |
| 1390 #else | |
| 1391 J->prev_fr.fp = (uintptr_t)(regs[R_SP] - POINTER_SIZE); | |
| 1392 #endif /* COMPILER2 */ | |
| 1393 } | |
| 1394 if (debug > 2) { | |
| 1395 printf("Jlookup_by_regs: J->prev_fr.fp = %#lx\n", J->prev_fr.fp); | |
| 1396 } | |
| 1397 | |
| 1398 if (read_pointer(J, fp + OFFSET_interpreter_frame_method, &methodOopPtr) != PS_OK) { | |
| 1399 methodOopPtr = 0; | |
| 1400 } | |
| 1401 if (read_pointer(J, fp + OFFSET_interpreter_frame_sender_sp, &sender_sp) != PS_OK) { | |
| 1402 sender_sp = 0; | |
| 1403 } | |
| 1404 if (read_pointer(J, fp + OFFSET_interpreter_frame_bcx_offset, &bcx) != PS_OK) { | |
| 1405 bcx = 0; | |
| 1406 } | |
| 1407 #endif /* i386 */ | |
| 1408 | |
| 1409 J->methodOopPtr = methodOopPtr; | |
| 1410 J->bcx = bcx; | |
| 1411 | |
| 1412 /* On x86 with C2 JVM: native frame may have wrong regs[R_FP] | |
| 1413 * For example: JVM_SuspendThread frame poins to the top interpreted frame. | |
| 1414 * If we call is_methodOop(J, methodOopPtr) before codecache_contains(J, pc) | |
| 1415 * then we go over and omit both: nmethod and I2CAdapter frames. | |
| 1416 * Note, that regs[R_PC] is always correct if frame defined correctly. | |
| 1417 * So it is better to call codecache_contains(J, pc) from the beginning. | |
| 1418 */ | |
| 1419 #ifndef X86_COMPILER2 | |
| 1420 if (is_methodOop(J, J->methodOopPtr)) { | |
| 1421 result = name_for_imethod(J, bcx, J->methodOopPtr, name, size, jframe); | |
| 1422 /* If the methodOopPtr is a method then this is highly likely to be | |
| 1423 an interpreter frame */ | |
| 1424 if (result >= 0) { | |
| 1425 is_interpreted = 1; | |
| 1426 } | |
| 1427 } else | |
| 1428 #endif /* ! X86_COMPILER2 */ | |
| 1429 | |
| 1430 if (codecache_contains(J, pc)) { | |
| 1431 result = name_for_codecache(J, fp, pc, name, size, jframe, &is_interpreted); | |
| 1432 } | |
| 1433 #ifdef X86_COMPILER2 | |
| 1434 else if (is_methodOop(J, J->methodOopPtr)) { | |
| 1435 result = name_for_imethod(J, bcx, J->methodOopPtr, name, size, jframe); | |
| 1436 /* If the methodOopPtr is a method then this is highly likely to be | |
| 1437 an interpreter frame */ | |
| 1438 if (result >= 0) { | |
| 1439 is_interpreted = 1; | |
| 1440 } | |
| 1441 } | |
| 1442 #endif /* X86_COMPILER2 */ | |
| 1443 else { | |
| 1444 if (debug) { | |
| 1445 fprintf(stderr, "Jlookup_by_regs: END with -1\n\n"); | |
| 1446 } | |
| 1447 result = -1; | |
| 1448 } | |
| 1449 if (!is_interpreted) { | |
| 1450 sender_sp = 0; | |
| 1451 } | |
| 1452 J->curr_fr.sender_sp = sender_sp; | |
| 1453 | |
| 1454 #ifdef X86_COMPILER2 | |
| 1455 if (!J->curr_fr.fp) { | |
| 1456 J->curr_fr.fp = (jframe->new_fp) ? jframe->new_fp : (uintptr_t)regs[R_FP]; | |
| 1457 } | |
| 1458 if (!jframe->new_pc && jframe->new_fp) { | |
| 1459 // This seems dubious | |
| 1460 read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc); | |
| 1461 CHECK_FAIL(err); | |
| 1462 if (debug > 2) { | |
| 1463 printf("Jlookup_by_regs: (update pc) jframe->new_fp: %#llx, jframe->new_pc: %#llx\n", | |
| 1464 jframe->new_fp, jframe->new_pc); | |
| 1465 } | |
| 1466 } | |
| 1467 | |
| 1468 #endif /* X86_COMPILER2 */ | |
| 1469 J->prev_fr = J->curr_fr; | |
| 1470 | |
| 1471 if (debug) | |
| 1472 fprintf(stderr, "Jlookup_by_regs: END\n\n"); | |
| 1473 | |
| 1474 return result; | |
| 1475 | |
| 1476 fail: | |
| 1477 return err; | |
| 1478 } | |
| 1479 | |
| 1480 void update_gregs(prgregset_t gregs, Jframe_t jframe) { | |
| 1481 #ifdef X86_COMPILER2 | |
| 1482 if (debug > 0) { | |
| 1483 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]); | |
| 1484 } | |
| 1485 /* | |
| 1486 * A workaround for java C2 frames with unconventional FP. | |
| 1487 * may have to modify regset with new values for FP/PC/SP when needed. | |
| 1488 */ | |
| 1489 if (jframe.new_sp) { | |
| 1490 *((uintptr_t *) &gregs[R_SP]) = (uintptr_t) jframe.new_sp; | |
| 1491 } else { | |
| 1492 // *((uintptr_t *) &gregs[R_SP]) = (uintptr_t) gregs[R_FP] + 2 * POINTER_SIZE; | |
| 1493 } | |
| 1494 | |
| 1495 if (jframe.new_fp) { | |
| 1496 *((uintptr_t *) &gregs[R_FP]) = (uintptr_t) jframe.new_fp; | |
| 1497 } | |
| 1498 if (jframe.new_pc) { | |
| 1499 *((uintptr_t *) &gregs[R_PC]) = (uintptr_t) jframe.new_pc; | |
| 1500 } | |
| 1501 if (debug > 0) { | |
| 1502 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]); | |
| 1503 } | |
| 1504 #endif /* X86_COMPILER2 */ | |
| 1505 } | |
| 1506 | |
| 1507 /* | |
| 1508 * Iterates over java frames at current location given by 'gregs'. | |
| 1509 * | |
| 1510 * Returns -1 if no java frames are present or if an error is encountered. | |
| 1511 * Returns the result of calling 'func' if the return value is non-zero. | |
| 1512 * Returns 0 otherwise. | |
| 1513 */ | |
| 1514 int Jframe_iter(jvm_agent_t *J, prgregset_t gregs, java_stack_f *func, void* cld) { | |
| 1515 char buf[MAX_SYM_SIZE + 1]; | |
| 1516 Jframe_t jframe; | |
| 1517 int i = 0, res; | |
| 1518 #ifdef X86_COMPILER2 | |
| 1519 if (debug > 0) { | |
| 1520 fprintf(stderr, "Jframe_iter: Entry sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]); | |
| 1521 } | |
| 1522 #endif /* X86_COMPILER2 */ | |
| 1523 | |
| 1524 memset(&jframe, 0, sizeof(Jframe_t)); | |
| 1525 memset(buf, 0, sizeof(buf)); | |
| 1526 res = Jlookup_by_regs(J, gregs, buf, sizeof(buf), &jframe); | |
| 1527 if (res != PS_OK) | |
| 1528 return (-1); | |
| 1529 | |
| 1530 | |
| 1531 res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1, | |
| 1532 jframe.line, NULL); | |
| 1533 if (res != 0) { | |
| 1534 update_gregs(gregs, jframe); | |
| 1535 return (res); | |
| 1536 } | |
| 1537 for (i = 1; i < jframe.vf_cnt; i++) { | |
| 1538 Jget_vframe(J, i, buf, sizeof(buf), &jframe); | |
| 1539 res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1, | |
| 1540 jframe.line, NULL); | |
| 1541 if (res != 0) { | |
| 1542 update_gregs(gregs, jframe); | |
| 1543 return (res); | |
| 1544 } | |
| 1545 } | |
| 1546 update_gregs(gregs, jframe); | |
| 1547 return (0); | |
| 1548 } |