1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17/* 18 * Dalvik initialization, shutdown, and command-line argument processing. 19 */ 20#define __STDC_LIMIT_MACROS 21#include <stdlib.h> 22#include <stdio.h> 23#include <signal.h> 24#include <limits.h> 25#include <ctype.h> 26#include <sys/mount.h> 27#include <sys/wait.h> 28#include <linux/fs.h> 29#include <cutils/fs.h> 30#include <unistd.h> 31 32#include "Dalvik.h" 33#include "test/Test.h" 34#include "mterp/Mterp.h" 35#include "Hash.h" 36 37#if defined(WITH_JIT) 38#include "compiler/codegen/Optimizer.h" 39#endif 40 41#define kMinHeapStartSize (1*1024*1024) 42#define kMinHeapSize (2*1024*1024) 43#define kMaxHeapSize (1*1024*1024*1024) 44 45/* 46 * Register VM-agnostic native methods for system classes. 47 */ 48extern int jniRegisterSystemMethods(JNIEnv* env); 49 50/* fwd */ 51static bool registerSystemNatives(JNIEnv* pEnv); 52static bool initJdwp(); 53static bool initZygote(); 54 55 56/* global state */ 57struct DvmGlobals gDvm; 58struct DvmJniGlobals gDvmJni; 59 60/* JIT-specific global state */ 61#if defined(WITH_JIT) 62struct DvmJitGlobals gDvmJit; 63 64#if defined(WITH_JIT_TUNING) 65/* 66 * Track the number of hits in the inline cache for predicted chaining. 67 * Use an ugly global variable here since it is accessed in assembly code. 68 */ 69int gDvmICHitCount; 70#endif 71 72#endif 73 74/* 75 * Show usage. 76 * 77 * We follow the tradition of unhyphenated compound words. 78 */ 79static void usage(const char* progName) 80{ 81 dvmFprintf(stderr, "%s: [options] class [argument ...]\n", progName); 82 dvmFprintf(stderr, "%s: [options] -jar file.jar [argument ...]\n",progName); 83 dvmFprintf(stderr, "\n"); 84 dvmFprintf(stderr, "The following standard options are recognized:\n"); 85 dvmFprintf(stderr, " -classpath classpath\n"); 86 dvmFprintf(stderr, " -Dproperty=value\n"); 87 dvmFprintf(stderr, " -verbose:tag ('gc', 'jni', or 'class')\n"); 88 dvmFprintf(stderr, " -ea[:<package name>... |:<class name>]\n"); 89 dvmFprintf(stderr, " -da[:<package name>... |:<class name>]\n"); 90 dvmFprintf(stderr, " (-enableassertions, -disableassertions)\n"); 91 dvmFprintf(stderr, " -esa\n"); 92 dvmFprintf(stderr, " -dsa\n"); 93 dvmFprintf(stderr, 94 " (-enablesystemassertions, -disablesystemassertions)\n"); 95 dvmFprintf(stderr, " -showversion\n"); 96 dvmFprintf(stderr, " -help\n"); 97 dvmFprintf(stderr, "\n"); 98 dvmFprintf(stderr, "The following extended options are recognized:\n"); 99 dvmFprintf(stderr, " -Xrunjdwp:<options>\n"); 100 dvmFprintf(stderr, " -Xbootclasspath:bootclasspath\n"); 101 dvmFprintf(stderr, " -Xcheck:tag (e.g. 'jni')\n"); 102 dvmFprintf(stderr, " -XmsN (min heap, must be multiple of 1K, >= 1MB)\n"); 103 dvmFprintf(stderr, " -XmxN (max heap, must be multiple of 1K, >= 2MB)\n"); 104 dvmFprintf(stderr, " -XssN (stack size, >= %dKB, <= %dKB)\n", 105 kMinStackSize / 1024, kMaxStackSize / 1024); 106 dvmFprintf(stderr, " -Xverify:{none,remote,all}\n"); 107 dvmFprintf(stderr, " -Xrs\n"); 108#if defined(WITH_JIT) 109 dvmFprintf(stderr, 110 " -Xint (extended to accept ':portable', ':fast' and ':jit')\n"); 111#else 112 dvmFprintf(stderr, 113 " -Xint (extended to accept ':portable' and ':fast')\n"); 114#endif 115 dvmFprintf(stderr, "\n"); 116 dvmFprintf(stderr, "These are unique to Dalvik:\n"); 117 dvmFprintf(stderr, " -Xzygote\n"); 118 dvmFprintf(stderr, " -Xdexopt:{none,verified,all,full}\n"); 119 dvmFprintf(stderr, " -Xnoquithandler\n"); 120 dvmFprintf(stderr, 121 " -Xjnigreflimit:N (must be multiple of 100, >= 200)\n"); 122 dvmFprintf(stderr, " -Xjniopts:{warnonly,forcecopy}\n"); 123 dvmFprintf(stderr, " -Xjnitrace:substring (eg NativeClass or nativeMethod)\n"); 124 dvmFprintf(stderr, " -Xstacktracefile:<filename>\n"); 125 dvmFprintf(stderr, " -Xgc:[no]precise\n"); 126 dvmFprintf(stderr, " -Xgc:[no]preverify\n"); 127 dvmFprintf(stderr, " -Xgc:[no]postverify\n"); 128 dvmFprintf(stderr, " -Xgc:[no]concurrent\n"); 129 dvmFprintf(stderr, " -Xgc:[no]verifycardtable\n"); 130 dvmFprintf(stderr, " -XX:+DisableExplicitGC\n"); 131 dvmFprintf(stderr, " -X[no]genregmap\n"); 132 dvmFprintf(stderr, " -Xverifyopt:[no]checkmon\n"); 133 dvmFprintf(stderr, " -Xcheckdexsum\n"); 134#if defined(WITH_JIT) 135 dvmFprintf(stderr, " -Xincludeselectedop\n"); 136 dvmFprintf(stderr, " -Xjitop:hexopvalue[-endvalue]" 137 "[,hexopvalue[-endvalue]]*\n"); 138 dvmFprintf(stderr, " -Xincludeselectedmethod\n"); 139 dvmFprintf(stderr, " -Xjitthreshold:decimalvalue\n"); 140 dvmFprintf(stderr, " -Xjitblocking\n"); 141 dvmFprintf(stderr, " -Xjitmethod:signature[,signature]* " 142 "(eg Ljava/lang/String\\;replace)\n"); 143 dvmFprintf(stderr, " -Xjitclass:classname[,classname]*\n"); 144 dvmFprintf(stderr, " -Xjitoffset:offset[,offset]\n"); 145 dvmFprintf(stderr, " -Xjitconfig:filename\n"); 146 dvmFprintf(stderr, " -Xjitcheckcg\n"); 147 dvmFprintf(stderr, " -Xjitverbose\n"); 148 dvmFprintf(stderr, " -Xjitprofile\n"); 149 dvmFprintf(stderr, " -Xjitdisableopt\n"); 150 dvmFprintf(stderr, " -Xjitsuspendpoll\n"); 151#endif 152 dvmFprintf(stderr, "\n"); 153 dvmFprintf(stderr, "Configured with:" 154 " debugger" 155 " profiler" 156 " hprof" 157#ifdef WITH_TRACKREF_CHECKS 158 " trackref_checks" 159#endif 160#ifdef WITH_INSTR_CHECKS 161 " instr_checks" 162#endif 163#ifdef WITH_EXTRA_OBJECT_VALIDATION 164 " extra_object_validation" 165#endif 166#ifdef WITH_EXTRA_GC_CHECKS 167 " extra_gc_checks" 168#endif 169#if !defined(NDEBUG) && defined(WITH_DALVIK_ASSERT) 170 " dalvik_assert" 171#endif 172#ifdef WITH_JNI_STACK_CHECK 173 " jni_stack_check" 174#endif 175#ifdef EASY_GDB 176 " easy_gdb" 177#endif 178#ifdef CHECK_MUTEX 179 " check_mutex" 180#endif 181#if defined(WITH_JIT) 182 " jit(" ARCH_VARIANT ")" 183#endif 184#if defined(WITH_SELF_VERIFICATION) 185 " self_verification" 186#endif 187#if ANDROID_SMP != 0 188 " smp" 189#endif 190 ); 191#ifdef DVM_SHOW_EXCEPTION 192 dvmFprintf(stderr, " show_exception=%d", DVM_SHOW_EXCEPTION); 193#endif 194 dvmFprintf(stderr, "\n\n"); 195} 196 197/* 198 * Show helpful information on JDWP options. 199 */ 200static void showJdwpHelp() 201{ 202 dvmFprintf(stderr, 203 "Example: -Xrunjdwp:transport=dt_socket,address=8000,server=y\n"); 204 dvmFprintf(stderr, 205 "Example: -Xrunjdwp:transport=dt_socket,address=localhost:6500,server=n\n"); 206} 207 208/* 209 * Show version and copyright info. 210 */ 211static void showVersion() 212{ 213 dvmFprintf(stdout, "DalvikVM version %d.%d.%d\n", 214 DALVIK_MAJOR_VERSION, DALVIK_MINOR_VERSION, DALVIK_BUG_VERSION); 215 dvmFprintf(stdout, 216 "Copyright (C) 2007 The Android Open Source Project\n\n" 217 "This software is built from source code licensed under the " 218 "Apache License,\n" 219 "Version 2.0 (the \"License\"). You may obtain a copy of the " 220 "License at\n\n" 221 " http://www.apache.org/licenses/LICENSE-2.0\n\n" 222 "See the associated NOTICE file for this software for further " 223 "details.\n"); 224} 225 226/* 227 * Parse a string of the form /[0-9]+[kKmMgG]?/, which is used to specify 228 * memory sizes. [kK] indicates kilobytes, [mM] megabytes, and 229 * [gG] gigabytes. 230 * 231 * "s" should point just past the "-Xm?" part of the string. 232 * "min" specifies the lowest acceptable value described by "s". 233 * "div" specifies a divisor, e.g. 1024 if the value must be a multiple 234 * of 1024. 235 * 236 * The spec says the -Xmx and -Xms options must be multiples of 1024. It 237 * doesn't say anything about -Xss. 238 * 239 * Returns 0 (a useless size) if "s" is malformed or specifies a low or 240 * non-evenly-divisible value. 241 */ 242static size_t parseMemOption(const char* s, size_t div) 243{ 244 /* strtoul accepts a leading [+-], which we don't want, 245 * so make sure our string starts with a decimal digit. 246 */ 247 if (isdigit(*s)) { 248 const char* s2; 249 size_t val; 250 251 val = strtoul(s, (char* *)&s2, 10); 252 if (s2 != s) { 253 /* s2 should be pointing just after the number. 254 * If this is the end of the string, the user 255 * has specified a number of bytes. Otherwise, 256 * there should be exactly one more character 257 * that specifies a multiplier. 258 */ 259 if (*s2 != '\0') { 260 char c; 261 262 /* The remainder of the string is either a single multiplier 263 * character, or nothing to indicate that the value is in 264 * bytes. 265 */ 266 c = *s2++; 267 if (*s2 == '\0') { 268 size_t mul; 269 270 if (c == '\0') { 271 mul = 1; 272 } else if (c == 'k' || c == 'K') { 273 mul = 1024; 274 } else if (c == 'm' || c == 'M') { 275 mul = 1024 * 1024; 276 } else if (c == 'g' || c == 'G') { 277 mul = 1024 * 1024 * 1024; 278 } else { 279 /* Unknown multiplier character. 280 */ 281 return 0; 282 } 283 284 if (val <= SIZE_MAX / mul) { 285 val *= mul; 286 } else { 287 /* Clamp to a multiple of 1024. 288 */ 289 val = SIZE_MAX & ~(1024-1); 290 } 291 } else { 292 /* There's more than one character after the 293 * numeric part. 294 */ 295 return 0; 296 } 297 } 298 299 /* The man page says that a -Xm value must be 300 * a multiple of 1024. 301 */ 302 if (val % div == 0) { 303 return val; 304 } 305 } 306 } 307 308 return 0; 309} 310 311/* 312 * Handle one of the JDWP name/value pairs. 313 * 314 * JDWP options are: 315 * help: if specified, show help message and bail 316 * transport: may be dt_socket or dt_shmem 317 * address: for dt_socket, "host:port", or just "port" when listening 318 * server: if "y", wait for debugger to attach; if "n", attach to debugger 319 * timeout: how long to wait for debugger to connect / listen 320 * 321 * Useful with server=n (these aren't supported yet): 322 * onthrow=<exception-name>: connect to debugger when exception thrown 323 * onuncaught=y|n: connect to debugger when uncaught exception thrown 324 * launch=<command-line>: launch the debugger itself 325 * 326 * The "transport" option is required, as is "address" if server=n. 327 */ 328static bool handleJdwpOption(const char* name, const char* value) 329{ 330 if (strcmp(name, "transport") == 0) { 331 if (strcmp(value, "dt_socket") == 0) { 332 gDvm.jdwpTransport = kJdwpTransportSocket; 333 } else if (strcmp(value, "dt_android_adb") == 0) { 334 gDvm.jdwpTransport = kJdwpTransportAndroidAdb; 335 } else { 336 ALOGE("JDWP transport '%s' not supported", value); 337 return false; 338 } 339 } else if (strcmp(name, "server") == 0) { 340 if (*value == 'n') 341 gDvm.jdwpServer = false; 342 else if (*value == 'y') 343 gDvm.jdwpServer = true; 344 else { 345 ALOGE("JDWP option 'server' must be 'y' or 'n'"); 346 return false; 347 } 348 } else if (strcmp(name, "suspend") == 0) { 349 if (*value == 'n') 350 gDvm.jdwpSuspend = false; 351 else if (*value == 'y') 352 gDvm.jdwpSuspend = true; 353 else { 354 ALOGE("JDWP option 'suspend' must be 'y' or 'n'"); 355 return false; 356 } 357 } else if (strcmp(name, "address") == 0) { 358 /* this is either <port> or <host>:<port> */ 359 const char* colon = strchr(value, ':'); 360 char* end; 361 long port; 362 363 if (colon != NULL) { 364 free(gDvm.jdwpHost); 365 gDvm.jdwpHost = (char*) malloc(colon - value +1); 366 strncpy(gDvm.jdwpHost, value, colon - value +1); 367 gDvm.jdwpHost[colon-value] = '\0'; 368 value = colon + 1; 369 } 370 if (*value == '\0') { 371 ALOGE("JDWP address missing port"); 372 return false; 373 } 374 port = strtol(value, &end, 10); 375 if (*end != '\0') { 376 ALOGE("JDWP address has junk in port field '%s'", value); 377 return false; 378 } 379 gDvm.jdwpPort = port; 380 } else if (strcmp(name, "launch") == 0 || 381 strcmp(name, "onthrow") == 0 || 382 strcmp(name, "oncaught") == 0 || 383 strcmp(name, "timeout") == 0) 384 { 385 /* valid but unsupported */ 386 ALOGI("Ignoring JDWP option '%s'='%s'", name, value); 387 } else { 388 ALOGI("Ignoring unrecognized JDWP option '%s'='%s'", name, value); 389 } 390 391 return true; 392} 393 394/* 395 * Parse the latter half of a -Xrunjdwp/-agentlib:jdwp= string, e.g.: 396 * "transport=dt_socket,address=8000,server=y,suspend=n" 397 */ 398static bool parseJdwpOptions(const char* str) 399{ 400 char* mangle = strdup(str); 401 char* name = mangle; 402 bool result = false; 403 404 /* 405 * Process all of the name=value pairs. 406 */ 407 while (true) { 408 char* value; 409 char* comma; 410 411 value = strchr(name, '='); 412 if (value == NULL) { 413 ALOGE("JDWP opts: garbage at '%s'", name); 414 goto bail; 415 } 416 417 comma = strchr(name, ','); // use name, not value, for safety 418 if (comma != NULL) { 419 if (comma < value) { 420 ALOGE("JDWP opts: found comma before '=' in '%s'", mangle); 421 goto bail; 422 } 423 *comma = '\0'; 424 } 425 426 *value++ = '\0'; // stomp the '=' 427 428 if (!handleJdwpOption(name, value)) 429 goto bail; 430 431 if (comma == NULL) { 432 /* out of options */ 433 break; 434 } 435 name = comma+1; 436 } 437 438 /* 439 * Make sure the combination of arguments makes sense. 440 */ 441 if (gDvm.jdwpTransport == kJdwpTransportUnknown) { 442 ALOGE("JDWP opts: must specify transport"); 443 goto bail; 444 } 445 if (!gDvm.jdwpServer && (gDvm.jdwpHost == NULL || gDvm.jdwpPort == 0)) { 446 ALOGE("JDWP opts: when server=n, must specify host and port"); 447 goto bail; 448 } 449 // transport mandatory 450 // outbound server address 451 452 gDvm.jdwpConfigured = true; 453 result = true; 454 455bail: 456 free(mangle); 457 return result; 458} 459 460/* 461 * Handle one of the four kinds of assertion arguments. 462 * 463 * "pkgOrClass" is the last part of an enable/disable line. For a package 464 * the arg looks like "-ea:com.google.fubar...", for a class it looks 465 * like "-ea:com.google.fubar.Wahoo". The string we get starts at the ':'. 466 * 467 * For system assertions (-esa/-dsa), "pkgOrClass" is NULL. 468 * 469 * Multiple instances of these arguments can be specified, e.g. you can 470 * enable assertions for a package and then disable them for one class in 471 * the package. 472 */ 473static bool enableAssertions(const char* pkgOrClass, bool enable) 474{ 475 AssertionControl* pCtrl = &gDvm.assertionCtrl[gDvm.assertionCtrlCount++]; 476 pCtrl->enable = enable; 477 478 if (pkgOrClass == NULL) { 479 /* enable or disable for all system classes */ 480 pCtrl->isPackage = false; 481 pCtrl->pkgOrClass = NULL; 482 pCtrl->pkgOrClassLen = 0; 483 } else { 484 if (*pkgOrClass == '\0') { 485 /* global enable/disable for all but system */ 486 pCtrl->isPackage = false; 487 pCtrl->pkgOrClass = strdup(""); 488 pCtrl->pkgOrClassLen = 0; 489 } else { 490 pCtrl->pkgOrClass = dvmDotToSlash(pkgOrClass+1); // skip ':' 491 if (pCtrl->pkgOrClass == NULL) { 492 /* can happen if class name includes an illegal '/' */ 493 ALOGW("Unable to process assertion arg '%s'", pkgOrClass); 494 return false; 495 } 496 497 int len = strlen(pCtrl->pkgOrClass); 498 if (len >= 3 && strcmp(pCtrl->pkgOrClass + len-3, "///") == 0) { 499 /* mark as package, truncate two of the three slashes */ 500 pCtrl->isPackage = true; 501 *(pCtrl->pkgOrClass + len-2) = '\0'; 502 pCtrl->pkgOrClassLen = len - 2; 503 } else { 504 /* just a class */ 505 pCtrl->isPackage = false; 506 pCtrl->pkgOrClassLen = len; 507 } 508 } 509 } 510 511 return true; 512} 513 514/* 515 * Turn assertions on when requested to do so by the Zygote. 516 * 517 * This is a bit sketchy. We can't (easily) go back and fiddle with all 518 * of the classes that have already been initialized, so this only 519 * affects classes that have yet to be loaded. If some or all assertions 520 * have been enabled through some other means, we don't want to mess with 521 * it here, so we do nothing. Finally, we assume that there's room in 522 * "assertionCtrl" to hold at least one entry; this is guaranteed by the 523 * allocator. 524 * 525 * This must only be called from the main thread during zygote init. 526 */ 527void dvmLateEnableAssertions() 528{ 529 if (gDvm.assertionCtrl == NULL) { 530 ALOGD("Not late-enabling assertions: no assertionCtrl array"); 531 return; 532 } else if (gDvm.assertionCtrlCount != 0) { 533 ALOGD("Not late-enabling assertions: some asserts already configured"); 534 return; 535 } 536 ALOGD("Late-enabling assertions"); 537 538 /* global enable for all but system */ 539 AssertionControl* pCtrl = gDvm.assertionCtrl; 540 pCtrl->pkgOrClass = strdup(""); 541 pCtrl->pkgOrClassLen = 0; 542 pCtrl->isPackage = false; 543 pCtrl->enable = true; 544 gDvm.assertionCtrlCount = 1; 545} 546 547 548/* 549 * Release memory associated with the AssertionCtrl array. 550 */ 551static void freeAssertionCtrl() 552{ 553 int i; 554 555 for (i = 0; i < gDvm.assertionCtrlCount; i++) 556 free(gDvm.assertionCtrl[i].pkgOrClass); 557 free(gDvm.assertionCtrl); 558} 559 560#if defined(WITH_JIT) 561/* Parse -Xjitop to selectively turn on/off certain opcodes for JIT */ 562static void processXjitop(const char* opt) 563{ 564 if (opt[7] == ':') { 565 const char* startPtr = &opt[8]; 566 char* endPtr = NULL; 567 568 do { 569 long startValue, endValue; 570 571 startValue = strtol(startPtr, &endPtr, 16); 572 if (startPtr != endPtr) { 573 /* Just in case value is out of range */ 574 startValue %= kNumPackedOpcodes; 575 576 if (*endPtr == '-') { 577 endValue = strtol(endPtr+1, &endPtr, 16); 578 endValue %= kNumPackedOpcodes; 579 } else { 580 endValue = startValue; 581 } 582 583 for (; startValue <= endValue; startValue++) { 584 ALOGW("Dalvik opcode %x is selected for debugging", 585 (unsigned int) startValue); 586 /* Mark the corresponding bit to 1 */ 587 gDvmJit.opList[startValue >> 3] |= 1 << (startValue & 0x7); 588 } 589 590 if (*endPtr == 0) { 591 break; 592 } 593 594 startPtr = endPtr + 1; 595 596 continue; 597 } else { 598 if (*endPtr != 0) { 599 dvmFprintf(stderr, 600 "Warning: Unrecognized opcode value substring " 601 "%s\n", endPtr); 602 } 603 break; 604 } 605 } while (1); 606 } else { 607 int i; 608 for (i = 0; i < (kNumPackedOpcodes+7)/8; i++) { 609 gDvmJit.opList[i] = 0xff; 610 } 611 dvmFprintf(stderr, "Warning: select all opcodes\n"); 612 } 613} 614 615/* Parse -Xjitoffset to selectively turn on/off traces with certain offsets for JIT */ 616static void processXjitoffset(const char* opt) { 617 gDvmJit.num_entries_pcTable = 0; 618 char* buf = strdup(opt); 619 char* start, *end; 620 start = buf; 621 int idx = 0; 622 do { 623 end = strchr(start, ','); 624 if (end) { 625 *end = 0; 626 } 627 628 dvmFprintf(stderr, "processXjitoffset start = %s\n", start); 629 char* tmp = strdup(start); 630 gDvmJit.pcTable[idx++] = atoi(tmp); 631 free(tmp); 632 if (idx >= COMPILER_PC_OFFSET_SIZE) { 633 dvmFprintf(stderr, "processXjitoffset: ignore entries beyond %d\n", COMPILER_PC_OFFSET_SIZE); 634 break; 635 } 636 if (end) { 637 start = end + 1; 638 } else { 639 break; 640 } 641 } while (1); 642 gDvmJit.num_entries_pcTable = idx; 643 free(buf); 644} 645 646/* Parse -Xjitmethod to selectively turn on/off certain methods for JIT */ 647static void processXjitmethod(const char* opt, bool isMethod) { 648 char* buf = strdup(opt); 649 650 if (isMethod && gDvmJit.methodTable == NULL) { 651 gDvmJit.methodTable = dvmHashTableCreate(8, NULL); 652 } 653 if (!isMethod && gDvmJit.classTable == NULL) { 654 gDvmJit.classTable = dvmHashTableCreate(8, NULL); 655 } 656 657 char* start = buf; 658 char* end; 659 /* 660 * Break comma-separated method signatures and enter them into the hash 661 * table individually. 662 */ 663 do { 664 int hashValue; 665 666 end = strchr(start, ','); 667 if (end) { 668 *end = 0; 669 } 670 671 hashValue = dvmComputeUtf8Hash(start); 672 dvmHashTableLookup(isMethod ? gDvmJit.methodTable : gDvmJit.classTable, 673 hashValue, strdup(start), (HashCompareFunc) strcmp, true); 674 675 if (end) { 676 start = end + 1; 677 } else { 678 break; 679 } 680 } while (1); 681 free(buf); 682} 683 684/* The format of jit_config.list: 685 EXCLUDE or INCLUDE 686 CLASS 687 prefix1 ... 688 METHOD 689 prefix 1 ... 690 OFFSET 691 index ... //each pair is a range, if pcOff falls into a range, JIT 692*/ 693static int processXjitconfig(const char* opt) { 694 FILE* fp = fopen(opt, "r"); 695 if (fp == NULL) { 696 return -1; 697 } 698 699 char fLine[500]; 700 bool startClass = false, startMethod = false, startOffset = false; 701 gDvmJit.num_entries_pcTable = 0; 702 int idx = 0; 703 704 while (fgets(fLine, 500, fp) != NULL) { 705 char* curLine = strtok(fLine, " \t\r\n"); 706 /* handles keyword CLASS, METHOD, INCLUDE, EXCLUDE */ 707 if (!strncmp(curLine, "CLASS", 5)) { 708 startClass = true; 709 startMethod = false; 710 startOffset = false; 711 continue; 712 } 713 if (!strncmp(curLine, "METHOD", 6)) { 714 startMethod = true; 715 startClass = false; 716 startOffset = false; 717 continue; 718 } 719 if (!strncmp(curLine, "OFFSET", 6)) { 720 startOffset = true; 721 startMethod = false; 722 startClass = false; 723 continue; 724 } 725 if (!strncmp(curLine, "EXCLUDE", 7)) { 726 gDvmJit.includeSelectedMethod = false; 727 continue; 728 } 729 if (!strncmp(curLine, "INCLUDE", 7)) { 730 gDvmJit.includeSelectedMethod = true; 731 continue; 732 } 733 if (!startMethod && !startClass && !startOffset) { 734 continue; 735 } 736 737 int hashValue = dvmComputeUtf8Hash(curLine); 738 if (startMethod) { 739 if (gDvmJit.methodTable == NULL) { 740 gDvmJit.methodTable = dvmHashTableCreate(8, NULL); 741 } 742 dvmHashTableLookup(gDvmJit.methodTable, hashValue, 743 strdup(curLine), 744 (HashCompareFunc) strcmp, true); 745 } else if (startClass) { 746 if (gDvmJit.classTable == NULL) { 747 gDvmJit.classTable = dvmHashTableCreate(8, NULL); 748 } 749 dvmHashTableLookup(gDvmJit.classTable, hashValue, 750 strdup(curLine), 751 (HashCompareFunc) strcmp, true); 752 } else if (startOffset) { 753 int tmpInt = atoi(curLine); 754 gDvmJit.pcTable[idx++] = tmpInt; 755 if (idx >= COMPILER_PC_OFFSET_SIZE) { 756 printf("processXjitoffset: ignore entries beyond %d\n", COMPILER_PC_OFFSET_SIZE); 757 break; 758 } 759 } 760 } 761 gDvmJit.num_entries_pcTable = idx; 762 fclose(fp); 763 return 0; 764} 765#endif 766 767/* 768 * Process an argument vector full of options. Unlike standard C programs, 769 * argv[0] does not contain the name of the program. 770 * 771 * If "ignoreUnrecognized" is set, we ignore options starting with "-X" or "_" 772 * that we don't recognize. Otherwise, we return with an error as soon as 773 * we see anything we can't identify. 774 * 775 * Returns 0 on success, -1 on failure, and 1 for the special case of 776 * "-version" where we want to stop without showing an error message. 777 */ 778static int processOptions(int argc, const char* const argv[], 779 bool ignoreUnrecognized) 780{ 781 int i; 782 783 ALOGV("VM options (%d):", argc); 784 for (i = 0; i < argc; i++) 785 ALOGV(" %d: '%s'", i, argv[i]); 786 787 /* 788 * Over-allocate AssertionControl array for convenience. If allocated, 789 * the array must be able to hold at least one entry, so that the 790 * zygote-time activation can do its business. 791 */ 792 assert(gDvm.assertionCtrl == NULL); 793 if (argc > 0) { 794 gDvm.assertionCtrl = 795 (AssertionControl*) malloc(sizeof(AssertionControl) * argc); 796 if (gDvm.assertionCtrl == NULL) 797 return -1; 798 assert(gDvm.assertionCtrlCount == 0); 799 } 800 801 for (i = 0; i < argc; i++) { 802 if (strcmp(argv[i], "-help") == 0) { 803 /* show usage and stop */ 804 return -1; 805 806 } else if (strcmp(argv[i], "-version") == 0) { 807 /* show version and stop */ 808 showVersion(); 809 return 1; 810 } else if (strcmp(argv[i], "-showversion") == 0) { 811 /* show version and continue */ 812 showVersion(); 813 814 } else if (strcmp(argv[i], "-classpath") == 0 || 815 strcmp(argv[i], "-cp") == 0) 816 { 817 /* set classpath */ 818 if (i == argc-1) { 819 dvmFprintf(stderr, "Missing classpath path list\n"); 820 return -1; 821 } 822 free(gDvm.classPathStr); /* in case we have compiled-in default */ 823 gDvm.classPathStr = strdup(argv[++i]); 824 825 } else if (strncmp(argv[i], "-Xbootclasspath:", 826 sizeof("-Xbootclasspath:")-1) == 0) 827 { 828 /* set bootclasspath */ 829 const char* path = argv[i] + sizeof("-Xbootclasspath:")-1; 830 831 if (*path == '\0') { 832 dvmFprintf(stderr, "Missing bootclasspath path list\n"); 833 return -1; 834 } 835 free(gDvm.bootClassPathStr); 836 gDvm.bootClassPathStr = strdup(path); 837 838 } else if (strncmp(argv[i], "-Xbootclasspath/a:", 839 sizeof("-Xbootclasspath/a:")-1) == 0) { 840 const char* appPath = argv[i] + sizeof("-Xbootclasspath/a:")-1; 841 842 if (*(appPath) == '\0') { 843 dvmFprintf(stderr, "Missing appending bootclasspath path list\n"); 844 return -1; 845 } 846 char* allPath; 847 848 if (asprintf(&allPath, "%s:%s", gDvm.bootClassPathStr, appPath) < 0) { 849 dvmFprintf(stderr, "Can't append to bootclasspath path list\n"); 850 return -1; 851 } 852 free(gDvm.bootClassPathStr); 853 gDvm.bootClassPathStr = allPath; 854 855 } else if (strncmp(argv[i], "-Xbootclasspath/p:", 856 sizeof("-Xbootclasspath/p:")-1) == 0) { 857 const char* prePath = argv[i] + sizeof("-Xbootclasspath/p:")-1; 858 859 if (*(prePath) == '\0') { 860 dvmFprintf(stderr, "Missing prepending bootclasspath path list\n"); 861 return -1; 862 } 863 char* allPath; 864 865 if (asprintf(&allPath, "%s:%s", prePath, gDvm.bootClassPathStr) < 0) { 866 dvmFprintf(stderr, "Can't prepend to bootclasspath path list\n"); 867 return -1; 868 } 869 free(gDvm.bootClassPathStr); 870 gDvm.bootClassPathStr = allPath; 871 872 } else if (strncmp(argv[i], "-D", 2) == 0) { 873 /* Properties are handled in managed code. We just check syntax. */ 874 if (strchr(argv[i], '=') == NULL) { 875 dvmFprintf(stderr, "Bad system property setting: \"%s\"\n", 876 argv[i]); 877 return -1; 878 } 879 gDvm.properties->push_back(argv[i] + 2); 880 881 } else if (strcmp(argv[i], "-jar") == 0) { 882 // TODO: handle this; name of jar should be in argv[i+1] 883 dvmFprintf(stderr, "-jar not yet handled\n"); 884 assert(false); 885 886 } else if (strncmp(argv[i], "-Xms", 4) == 0) { 887 size_t val = parseMemOption(argv[i]+4, 1024); 888 if (val != 0) { 889 if (val >= kMinHeapStartSize && val <= kMaxHeapSize) { 890 gDvm.heapStartingSize = val; 891 } else { 892 dvmFprintf(stderr, 893 "Invalid -Xms '%s', range is %dKB to %dKB\n", 894 argv[i], kMinHeapStartSize/1024, kMaxHeapSize/1024); 895 return -1; 896 } 897 } else { 898 dvmFprintf(stderr, "Invalid -Xms option '%s'\n", argv[i]); 899 return -1; 900 } 901 } else if (strncmp(argv[i], "-Xmx", 4) == 0) { 902 size_t val = parseMemOption(argv[i]+4, 1024); 903 if (val != 0) { 904 if (val >= kMinHeapSize && val <= kMaxHeapSize) { 905 gDvm.heapMaximumSize = val; 906 } else { 907 dvmFprintf(stderr, 908 "Invalid -Xmx '%s', range is %dKB to %dKB\n", 909 argv[i], kMinHeapSize/1024, kMaxHeapSize/1024); 910 return -1; 911 } 912 } else { 913 dvmFprintf(stderr, "Invalid -Xmx option '%s'\n", argv[i]); 914 return -1; 915 } 916 } else if (strncmp(argv[i], "-XX:HeapGrowthLimit=", 20) == 0) { 917 size_t val = parseMemOption(argv[i] + 20, 1024); 918 if (val != 0) { 919 gDvm.heapGrowthLimit = val; 920 } else { 921 dvmFprintf(stderr, "Invalid -XX:HeapGrowthLimit option '%s'\n", argv[i]); 922 return -1; 923 } 924 } else if (strncmp(argv[i], "-XX:HeapMinFree=", 16) == 0) { 925 size_t val = parseMemOption(argv[i] + 16, 1024); 926 if (val != 0) { 927 gDvm.heapMinFree = val; 928 } else { 929 dvmFprintf(stderr, "Invalid -XX:HeapMinFree option '%s'\n", argv[i]); 930 return -1; 931 } 932 } else if (strncmp(argv[i], "-XX:HeapMaxFree=", 16) == 0) { 933 size_t val = parseMemOption(argv[i] + 16, 1024); 934 if (val != 0) { 935 gDvm.heapMaxFree = val; 936 } else { 937 dvmFprintf(stderr, "Invalid -XX:HeapMaxFree option '%s'\n", argv[i]); 938 return -1; 939 } 940 } else if (strncmp(argv[i], "-XX:HeapTargetUtilization=", 26) == 0) { 941 const char* start = argv[i] + 26; 942 const char* end = start; 943 double val = strtod(start, const_cast<char**>(&end)); 944 // Ensure that we have a value, there was no cruft after it and it 945 // satisfies a sensible range. 946 bool sane_val = (start != end) && (end[0] == '\0') && 947 (val >= 0.1) && (val <= 0.9); 948 if (sane_val) { 949 gDvm.heapTargetUtilization = val; 950 } else { 951 dvmFprintf(stderr, "Invalid -XX:HeapTargetUtilization option '%s'\n", argv[i]); 952 return -1; 953 } 954 } else if (strncmp(argv[i], "-Xss", 4) == 0) { 955 size_t val = parseMemOption(argv[i]+4, 1); 956 if (val != 0) { 957 if (val >= kMinStackSize && val <= kMaxStackSize) { 958 gDvm.stackSize = val; 959 if (val > gDvm.mainThreadStackSize) { 960 gDvm.mainThreadStackSize = val; 961 } 962 } else { 963 dvmFprintf(stderr, "Invalid -Xss '%s', range is %d to %d\n", 964 argv[i], kMinStackSize, kMaxStackSize); 965 return -1; 966 } 967 } else { 968 dvmFprintf(stderr, "Invalid -Xss option '%s'\n", argv[i]); 969 return -1; 970 } 971 972 } else if (strncmp(argv[i], "-XX:mainThreadStackSize=", strlen("-XX:mainThreadStackSize=")) == 0) { 973 size_t val = parseMemOption(argv[i] + strlen("-XX:mainThreadStackSize="), 1); 974 if (val != 0) { 975 if (val >= kMinStackSize && val <= kMaxStackSize) { 976 gDvm.mainThreadStackSize = val; 977 } else { 978 dvmFprintf(stderr, "Invalid -XX:mainThreadStackSize '%s', range is %d to %d\n", 979 argv[i], kMinStackSize, kMaxStackSize); 980 return -1; 981 } 982 } else { 983 dvmFprintf(stderr, "Invalid -XX:mainThreadStackSize option '%s'\n", argv[i]); 984 return -1; 985 } 986 987 } else if (strncmp(argv[i], "-XX:+DisableExplicitGC", 22) == 0) { 988 gDvm.disableExplicitGc = true; 989 } else if (strcmp(argv[i], "-verbose") == 0 || 990 strcmp(argv[i], "-verbose:class") == 0) 991 { 992 // JNI spec says "-verbose:gc,class" is valid, but cmd line 993 // doesn't work that way; may want to support. 994 gDvm.verboseClass = true; 995 } else if (strcmp(argv[i], "-verbose:jni") == 0) { 996 gDvm.verboseJni = true; 997 } else if (strcmp(argv[i], "-verbose:gc") == 0) { 998 gDvm.verboseGc = true; 999 } else if (strcmp(argv[i], "-verbose:shutdown") == 0) { 1000 gDvm.verboseShutdown = true; 1001 1002 } else if (strncmp(argv[i], "-enableassertions", 17) == 0) { 1003 enableAssertions(argv[i] + 17, true); 1004 } else if (strncmp(argv[i], "-ea", 3) == 0) { 1005 enableAssertions(argv[i] + 3, true); 1006 } else if (strncmp(argv[i], "-disableassertions", 18) == 0) { 1007 enableAssertions(argv[i] + 18, false); 1008 } else if (strncmp(argv[i], "-da", 3) == 0) { 1009 enableAssertions(argv[i] + 3, false); 1010 } else if (strcmp(argv[i], "-enablesystemassertions") == 0 || 1011 strcmp(argv[i], "-esa") == 0) 1012 { 1013 enableAssertions(NULL, true); 1014 } else if (strcmp(argv[i], "-disablesystemassertions") == 0 || 1015 strcmp(argv[i], "-dsa") == 0) 1016 { 1017 enableAssertions(NULL, false); 1018 1019 } else if (strncmp(argv[i], "-Xcheck:jni", 11) == 0) { 1020 /* nothing to do now -- was handled during JNI init */ 1021 1022 } else if (strcmp(argv[i], "-Xdebug") == 0) { 1023 /* accept but ignore */ 1024 1025 } else if (strncmp(argv[i], "-Xrunjdwp:", 10) == 0 || 1026 strncmp(argv[i], "-agentlib:jdwp=", 15) == 0) 1027 { 1028 const char* tail; 1029 1030 if (argv[i][1] == 'X') 1031 tail = argv[i] + 10; 1032 else 1033 tail = argv[i] + 15; 1034 1035 if (strncmp(tail, "help", 4) == 0 || !parseJdwpOptions(tail)) { 1036 showJdwpHelp(); 1037 return 1; 1038 } 1039 } else if (strcmp(argv[i], "-Xrs") == 0) { 1040 gDvm.reduceSignals = true; 1041 } else if (strcmp(argv[i], "-Xnoquithandler") == 0) { 1042 /* disables SIGQUIT handler thread while still blocking SIGQUIT */ 1043 /* (useful if we don't want thread but system still signals us) */ 1044 gDvm.noQuitHandler = true; 1045 } else if (strcmp(argv[i], "-Xzygote") == 0) { 1046 gDvm.zygote = true; 1047#if defined(WITH_JIT) 1048 gDvmJit.runningInAndroidFramework = true; 1049#endif 1050 } else if (strncmp(argv[i], "-Xdexopt:", 9) == 0) { 1051 if (strcmp(argv[i] + 9, "none") == 0) 1052 gDvm.dexOptMode = OPTIMIZE_MODE_NONE; 1053 else if (strcmp(argv[i] + 9, "verified") == 0) 1054 gDvm.dexOptMode = OPTIMIZE_MODE_VERIFIED; 1055 else if (strcmp(argv[i] + 9, "all") == 0) 1056 gDvm.dexOptMode = OPTIMIZE_MODE_ALL; 1057 else if (strcmp(argv[i] + 9, "full") == 0) 1058 gDvm.dexOptMode = OPTIMIZE_MODE_FULL; 1059 else { 1060 dvmFprintf(stderr, "Unrecognized dexopt option '%s'\n",argv[i]); 1061 return -1; 1062 } 1063 } else if (strncmp(argv[i], "-Xverify:", 9) == 0) { 1064 if (strcmp(argv[i] + 9, "none") == 0) 1065 gDvm.classVerifyMode = VERIFY_MODE_NONE; 1066 else if (strcmp(argv[i] + 9, "remote") == 0) 1067 gDvm.classVerifyMode = VERIFY_MODE_REMOTE; 1068 else if (strcmp(argv[i] + 9, "all") == 0) 1069 gDvm.classVerifyMode = VERIFY_MODE_ALL; 1070 else { 1071 dvmFprintf(stderr, "Unrecognized verify option '%s'\n",argv[i]); 1072 return -1; 1073 } 1074 } else if (strncmp(argv[i], "-Xjnigreflimit:", 15) == 0) { 1075 int lim = atoi(argv[i] + 15); 1076 if (lim < 200 || (lim % 100) != 0) { 1077 dvmFprintf(stderr, "Bad value for -Xjnigreflimit: '%s'\n", 1078 argv[i]+15); 1079 return -1; 1080 } 1081 gDvm.jniGrefLimit = lim; 1082 } else if (strncmp(argv[i], "-Xjnitrace:", 11) == 0) { 1083 gDvm.jniTrace = strdup(argv[i] + 11); 1084 } else if (strcmp(argv[i], "-Xlog-stdio") == 0) { 1085 gDvm.logStdio = true; 1086 1087 } else if (strncmp(argv[i], "-Xint", 5) == 0) { 1088 if (argv[i][5] == ':') { 1089 if (strcmp(argv[i] + 6, "portable") == 0) 1090 gDvm.executionMode = kExecutionModeInterpPortable; 1091 else if (strcmp(argv[i] + 6, "fast") == 0) 1092 gDvm.executionMode = kExecutionModeInterpFast; 1093#ifdef WITH_JIT 1094 else if (strcmp(argv[i] + 6, "jit") == 0) 1095 gDvm.executionMode = kExecutionModeJit; 1096#endif 1097 else { 1098 dvmFprintf(stderr, 1099 "Warning: Unrecognized interpreter mode %s\n",argv[i]); 1100 /* keep going */ 1101 } 1102 } else { 1103 /* disable JIT if it was enabled by default */ 1104 gDvm.executionMode = kExecutionModeInterpFast; 1105 } 1106 1107 } else if (strncmp(argv[i], "-Xlockprofthreshold:", 20) == 0) { 1108 gDvm.lockProfThreshold = atoi(argv[i] + 20); 1109 1110#ifdef WITH_JIT 1111 } else if (strncmp(argv[i], "-Xjitop", 7) == 0) { 1112 processXjitop(argv[i]); 1113 } else if (strncmp(argv[i], "-Xjitmethod:", 12) == 0) { 1114 processXjitmethod(argv[i] + strlen("-Xjitmethod:"), true); 1115 } else if (strncmp(argv[i], "-Xjitclass:", 11) == 0) { 1116 processXjitmethod(argv[i] + strlen("-Xjitclass:"), false); 1117 } else if (strncmp(argv[i], "-Xjitoffset:", 12) == 0) { 1118 processXjitoffset(argv[i] + strlen("-Xjitoffset:")); 1119 } else if (strncmp(argv[i], "-Xjitconfig:", 12) == 0) { 1120 processXjitconfig(argv[i] + strlen("-Xjitconfig:")); 1121 } else if (strncmp(argv[i], "-Xjitblocking", 13) == 0) { 1122 gDvmJit.blockingMode = true; 1123 } else if (strncmp(argv[i], "-Xjitthreshold:", 15) == 0) { 1124 gDvmJit.threshold = atoi(argv[i] + 15); 1125 } else if (strncmp(argv[i], "-Xincludeselectedop", 19) == 0) { 1126 gDvmJit.includeSelectedOp = true; 1127 } else if (strncmp(argv[i], "-Xincludeselectedmethod", 23) == 0) { 1128 gDvmJit.includeSelectedMethod = true; 1129 } else if (strncmp(argv[i], "-Xjitcheckcg", 12) == 0) { 1130 gDvmJit.checkCallGraph = true; 1131 /* Need to enable blocking mode due to stack crawling */ 1132 gDvmJit.blockingMode = true; 1133 } else if (strncmp(argv[i], "-Xjitdumpbin", 12) == 0) { 1134 gDvmJit.printBinary = true; 1135 } else if (strncmp(argv[i], "-Xjitverbose", 12) == 0) { 1136 gDvmJit.printMe = true; 1137 } else if (strncmp(argv[i], "-Xjitprofile", 12) == 0) { 1138 gDvmJit.profileMode = kTraceProfilingContinuous; 1139 } else if (strncmp(argv[i], "-Xjitdisableopt", 15) == 0) { 1140 /* Disable selected optimizations */ 1141 if (argv[i][15] == ':') { 1142 sscanf(argv[i] + 16, "%x", &gDvmJit.disableOpt); 1143 /* Disable all optimizations */ 1144 } else { 1145 gDvmJit.disableOpt = -1; 1146 } 1147 } else if (strncmp(argv[i], "-Xjitsuspendpoll", 16) == 0) { 1148 gDvmJit.genSuspendPoll = true; 1149#endif 1150 1151 } else if (strncmp(argv[i], "-Xstacktracefile:", 17) == 0) { 1152 gDvm.stackTraceFile = strdup(argv[i]+17); 1153 1154 } else if (strcmp(argv[i], "-Xgenregmap") == 0) { 1155 gDvm.generateRegisterMaps = true; 1156 } else if (strcmp(argv[i], "-Xnogenregmap") == 0) { 1157 gDvm.generateRegisterMaps = false; 1158 1159 } else if (strcmp(argv[i], "Xverifyopt:checkmon") == 0) { 1160 gDvm.monitorVerification = true; 1161 } else if (strcmp(argv[i], "Xverifyopt:nocheckmon") == 0) { 1162 gDvm.monitorVerification = false; 1163 1164 } else if (strncmp(argv[i], "-Xgc:", 5) == 0) { 1165 if (strcmp(argv[i] + 5, "precise") == 0) 1166 gDvm.preciseGc = true; 1167 else if (strcmp(argv[i] + 5, "noprecise") == 0) 1168 gDvm.preciseGc = false; 1169 else if (strcmp(argv[i] + 5, "preverify") == 0) 1170 gDvm.preVerify = true; 1171 else if (strcmp(argv[i] + 5, "nopreverify") == 0) 1172 gDvm.preVerify = false; 1173 else if (strcmp(argv[i] + 5, "postverify") == 0) 1174 gDvm.postVerify = true; 1175 else if (strcmp(argv[i] + 5, "nopostverify") == 0) 1176 gDvm.postVerify = false; 1177 else if (strcmp(argv[i] + 5, "concurrent") == 0) 1178 gDvm.concurrentMarkSweep = true; 1179 else if (strcmp(argv[i] + 5, "noconcurrent") == 0) 1180 gDvm.concurrentMarkSweep = false; 1181 else if (strcmp(argv[i] + 5, "verifycardtable") == 0) 1182 gDvm.verifyCardTable = true; 1183 else if (strcmp(argv[i] + 5, "noverifycardtable") == 0) 1184 gDvm.verifyCardTable = false; 1185 else { 1186 dvmFprintf(stderr, "Bad value for -Xgc"); 1187 return -1; 1188 } 1189 ALOGV("Precise GC configured %s", gDvm.preciseGc ? "ON" : "OFF"); 1190 1191 } else if (strcmp(argv[i], "-Xcheckdexsum") == 0) { 1192 gDvm.verifyDexChecksum = true; 1193 1194 } else if (strcmp(argv[i], "-Xprofile:threadcpuclock") == 0) { 1195 gDvm.profilerClockSource = kProfilerClockSourceThreadCpu; 1196 } else if (strcmp(argv[i], "-Xprofile:wallclock") == 0) { 1197 gDvm.profilerClockSource = kProfilerClockSourceWall; 1198 } else if (strcmp(argv[i], "-Xprofile:dualclock") == 0) { 1199 gDvm.profilerClockSource = kProfilerClockSourceDual; 1200 1201 } else { 1202 if (!ignoreUnrecognized) { 1203 dvmFprintf(stderr, "Unrecognized option '%s'\n", argv[i]); 1204 return -1; 1205 } 1206 } 1207 } 1208 1209 return 0; 1210} 1211 1212/* 1213 * Set defaults for fields altered or modified by arguments. 1214 * 1215 * Globals are initialized to 0 (a/k/a NULL or false). 1216 */ 1217static void setCommandLineDefaults() 1218{ 1219 const char* envStr = getenv("CLASSPATH"); 1220 if (envStr != NULL) { 1221 gDvm.classPathStr = strdup(envStr); 1222 } else { 1223 gDvm.classPathStr = strdup("."); 1224 } 1225 envStr = getenv("BOOTCLASSPATH"); 1226 if (envStr != NULL) { 1227 gDvm.bootClassPathStr = strdup(envStr); 1228 } else { 1229 gDvm.bootClassPathStr = strdup("."); 1230 } 1231 1232 gDvm.properties = new std::vector<std::string>(); 1233 1234 /* Defaults overridden by -Xms and -Xmx. 1235 * TODO: base these on a system or application-specific default 1236 */ 1237 gDvm.heapStartingSize = 2 * 1024 * 1024; // Spec says 16MB; too big for us. 1238 gDvm.heapMaximumSize = 16 * 1024 * 1024; // Spec says 75% physical mem 1239 gDvm.heapGrowthLimit = 0; // 0 means no growth limit 1240 gDvm.stackSize = kDefaultStackSize; 1241 gDvm.mainThreadStackSize = kDefaultStackSize; 1242 // When the heap is less than the maximum or growth limited size, 1243 // fix the free portion of the heap. The utilization is the ratio 1244 // of live to free memory, 0.5 implies half the heap is available 1245 // to allocate into before a GC occurs. Min free and max free 1246 // force the free memory to never be smaller than min free or 1247 // larger than max free. 1248 gDvm.heapTargetUtilization = 0.5; 1249 gDvm.heapMaxFree = 2 * 1024 * 1024; 1250 gDvm.heapMinFree = gDvm.heapMaxFree / 4; 1251 1252 gDvm.concurrentMarkSweep = true; 1253 1254 /* gDvm.jdwpSuspend = true; */ 1255 1256 /* allowed unless zygote config doesn't allow it */ 1257 gDvm.jdwpAllowed = true; 1258 1259 /* default verification and optimization modes */ 1260 gDvm.classVerifyMode = VERIFY_MODE_ALL; 1261 gDvm.dexOptMode = OPTIMIZE_MODE_VERIFIED; 1262 gDvm.monitorVerification = false; 1263 gDvm.generateRegisterMaps = true; 1264 gDvm.registerMapMode = kRegisterMapModeTypePrecise; 1265 1266 /* 1267 * Default execution mode. 1268 * 1269 * This should probably interact with the mterp code somehow, e.g. if 1270 * we know we're using the "desktop" build we should probably be 1271 * using "portable" rather than "fast". 1272 */ 1273#if defined(WITH_JIT) 1274 gDvm.executionMode = kExecutionModeJit; 1275 gDvmJit.num_entries_pcTable = 0; 1276 gDvmJit.includeSelectedMethod = false; 1277 gDvmJit.includeSelectedOffset = false; 1278 gDvmJit.methodTable = NULL; 1279 gDvmJit.classTable = NULL; 1280 1281 gDvm.constInit = false; 1282 gDvm.commonInit = false; 1283#else 1284 gDvm.executionMode = kExecutionModeInterpFast; 1285#endif 1286 1287 /* 1288 * SMP support is a compile-time define, but we may want to have 1289 * dexopt target a differently-configured device. 1290 */ 1291 gDvm.dexOptForSmp = (ANDROID_SMP != 0); 1292 1293 /* 1294 * Default profiler configuration. 1295 */ 1296 gDvm.profilerClockSource = kProfilerClockSourceDual; 1297} 1298 1299 1300/* 1301 * Handle a SIGBUS, which frequently occurs because somebody replaced an 1302 * optimized DEX file out from under us. 1303 */ 1304static void busCatcher(int signum, siginfo_t* info, void* context) 1305{ 1306 void* addr = info->si_addr; 1307 1308 ALOGE("Caught a SIGBUS (%d), addr=%p", signum, addr); 1309 1310 /* 1311 * If we return at this point the SIGBUS just keeps happening, so we 1312 * remove the signal handler and allow it to kill us. TODO: restore 1313 * the original, which points to a debuggerd stub; if we don't then 1314 * debuggerd won't be notified. 1315 */ 1316 signal(SIGBUS, SIG_DFL); 1317} 1318 1319/* 1320 * Configure signals. We need to block SIGQUIT so that the signal only 1321 * reaches the dump-stack-trace thread. 1322 * 1323 * This can be disabled with the "-Xrs" flag. 1324 */ 1325static void blockSignals() 1326{ 1327 sigset_t mask; 1328 int cc; 1329 1330 sigemptyset(&mask); 1331 sigaddset(&mask, SIGQUIT); 1332 sigaddset(&mask, SIGUSR1); // used to initiate heap dump 1333#if defined(WITH_JIT) && defined(WITH_JIT_TUNING) 1334 sigaddset(&mask, SIGUSR2); // used to investigate JIT internals 1335#endif 1336 //sigaddset(&mask, SIGPIPE); 1337 cc = sigprocmask(SIG_BLOCK, &mask, NULL); 1338 assert(cc == 0); 1339 1340 if (false) { 1341 /* TODO: save the old sigaction in a global */ 1342 struct sigaction sa; 1343 memset(&sa, 0, sizeof(sa)); 1344 sa.sa_sigaction = busCatcher; 1345 sa.sa_flags = SA_SIGINFO; 1346 cc = sigaction(SIGBUS, &sa, NULL); 1347 assert(cc == 0); 1348 } 1349} 1350 1351class ScopedShutdown { 1352public: 1353 ScopedShutdown() : armed_(true) { 1354 } 1355 1356 ~ScopedShutdown() { 1357 if (armed_) { 1358 dvmShutdown(); 1359 } 1360 } 1361 1362 void disarm() { 1363 armed_ = false; 1364 } 1365 1366private: 1367 bool armed_; 1368}; 1369 1370/* 1371 * VM initialization. Pass in any options provided on the command line. 1372 * Do not pass in the class name or the options for the class. 1373 * 1374 * Returns 0 on success. 1375 */ 1376std::string dvmStartup(int argc, const char* const argv[], 1377 bool ignoreUnrecognized, JNIEnv* pEnv) 1378{ 1379 ScopedShutdown scopedShutdown; 1380 1381 assert(gDvm.initializing); 1382 1383 ALOGV("VM init args (%d):", argc); 1384 for (int i = 0; i < argc; i++) { 1385 ALOGV(" %d: '%s'", i, argv[i]); 1386 } 1387 setCommandLineDefaults(); 1388 1389 /* 1390 * Process the option flags (if any). 1391 */ 1392 int cc = processOptions(argc, argv, ignoreUnrecognized); 1393 if (cc != 0) { 1394 if (cc < 0) { 1395 dvmFprintf(stderr, "\n"); 1396 usage("dalvikvm"); 1397 } 1398 return "syntax error"; 1399 } 1400 1401#if WITH_EXTRA_GC_CHECKS > 1 1402 /* only "portable" interp has the extra goodies */ 1403 if (gDvm.executionMode != kExecutionModeInterpPortable) { 1404 ALOGI("Switching to 'portable' interpreter for GC checks"); 1405 gDvm.executionMode = kExecutionModeInterpPortable; 1406 } 1407#endif 1408 1409 /* Configure group scheduling capabilities */ 1410 if (!access("/dev/cpuctl/tasks", F_OK)) { 1411 ALOGV("Using kernel group scheduling"); 1412 gDvm.kernelGroupScheduling = 1; 1413 } else { 1414 ALOGV("Using kernel scheduler policies"); 1415 } 1416 1417 /* configure signal handling */ 1418 if (!gDvm.reduceSignals) 1419 blockSignals(); 1420 1421 /* verify system page size */ 1422 if (sysconf(_SC_PAGESIZE) != SYSTEM_PAGE_SIZE) { 1423 return StringPrintf("expected page size %d, got %d", 1424 SYSTEM_PAGE_SIZE, (int) sysconf(_SC_PAGESIZE)); 1425 } 1426 1427 /* mterp setup */ 1428 ALOGV("Using executionMode %d", gDvm.executionMode); 1429 dvmCheckAsmConstants(); 1430 1431 /* 1432 * Initialize components. 1433 */ 1434 dvmQuasiAtomicsStartup(); 1435 if (!dvmAllocTrackerStartup()) { 1436 return "dvmAllocTrackerStartup failed"; 1437 } 1438 if (!dvmGcStartup()) { 1439 return "dvmGcStartup failed"; 1440 } 1441 if (!dvmThreadStartup()) { 1442 return "dvmThreadStartup failed"; 1443 } 1444 if (!dvmInlineNativeStartup()) { 1445 return "dvmInlineNativeStartup"; 1446 } 1447 if (!dvmRegisterMapStartup()) { 1448 return "dvmRegisterMapStartup failed"; 1449 } 1450 if (!dvmInstanceofStartup()) { 1451 return "dvmInstanceofStartup failed"; 1452 } 1453 if (!dvmClassStartup()) { 1454 return "dvmClassStartup failed"; 1455 } 1456 1457 /* 1458 * At this point, the system is guaranteed to be sufficiently 1459 * initialized that we can look up classes and class members. This 1460 * call populates the gDvm instance with all the class and member 1461 * references that the VM wants to use directly. 1462 */ 1463 if (!dvmFindRequiredClassesAndMembers()) { 1464 return "dvmFindRequiredClassesAndMembers failed"; 1465 } 1466 1467 if (!dvmStringInternStartup()) { 1468 return "dvmStringInternStartup failed"; 1469 } 1470 if (!dvmNativeStartup()) { 1471 return "dvmNativeStartup failed"; 1472 } 1473 if (!dvmInternalNativeStartup()) { 1474 return "dvmInternalNativeStartup failed"; 1475 } 1476 if (!dvmJniStartup()) { 1477 return "dvmJniStartup failed"; 1478 } 1479 if (!dvmProfilingStartup()) { 1480 return "dvmProfilingStartup failed"; 1481 } 1482 1483 /* 1484 * Create a table of methods for which we will substitute an "inline" 1485 * version for performance. 1486 */ 1487 if (!dvmCreateInlineSubsTable()) { 1488 return "dvmCreateInlineSubsTable failed"; 1489 } 1490 1491 /* 1492 * Miscellaneous class library validation. 1493 */ 1494 if (!dvmValidateBoxClasses()) { 1495 return "dvmValidateBoxClasses failed"; 1496 } 1497 1498 /* 1499 * Do the last bits of Thread struct initialization we need to allow 1500 * JNI calls to work. 1501 */ 1502 if (!dvmPrepMainForJni(pEnv)) { 1503 return "dvmPrepMainForJni failed"; 1504 } 1505 1506 /* 1507 * Explicitly initialize java.lang.Class. This doesn't happen 1508 * automatically because it's allocated specially (it's an instance 1509 * of itself). Must happen before registration of system natives, 1510 * which make some calls that throw assertions if the classes they 1511 * operate on aren't initialized. 1512 */ 1513 if (!dvmInitClass(gDvm.classJavaLangClass)) { 1514 return "couldn't initialized java.lang.Class"; 1515 } 1516 1517 /* 1518 * Register the system native methods, which are registered through JNI. 1519 */ 1520 if (!registerSystemNatives(pEnv)) { 1521 return "couldn't register system natives"; 1522 } 1523 1524 /* 1525 * Do some "late" initialization for the memory allocator. This may 1526 * allocate storage and initialize classes. 1527 */ 1528 if (!dvmCreateStockExceptions()) { 1529 return "dvmCreateStockExceptions failed"; 1530 } 1531 1532 /* 1533 * At this point, the VM is in a pretty good state. Finish prep on 1534 * the main thread (specifically, create a java.lang.Thread object to go 1535 * along with our Thread struct). Note we will probably be executing 1536 * some interpreted class initializer code in here. 1537 */ 1538 if (!dvmPrepMainThread()) { 1539 return "dvmPrepMainThread failed"; 1540 } 1541 1542 /* 1543 * Make sure we haven't accumulated any tracked references. The main 1544 * thread should be starting with a clean slate. 1545 */ 1546 if (dvmReferenceTableEntries(&dvmThreadSelf()->internalLocalRefTable) != 0) 1547 { 1548 ALOGW("Warning: tracked references remain post-initialization"); 1549 dvmDumpReferenceTable(&dvmThreadSelf()->internalLocalRefTable, "MAIN"); 1550 } 1551 1552 /* general debugging setup */ 1553 if (!dvmDebuggerStartup()) { 1554 return "dvmDebuggerStartup failed"; 1555 } 1556 1557 if (!dvmGcStartupClasses()) { 1558 return "dvmGcStartupClasses failed"; 1559 } 1560 1561 /* 1562 * Init for either zygote mode or non-zygote mode. The key difference 1563 * is that we don't start any additional threads in Zygote mode. 1564 */ 1565 if (gDvm.zygote) { 1566 if (!initZygote()) { 1567 return "initZygote failed"; 1568 } 1569 } else { 1570 if (!dvmInitAfterZygote()) { 1571 return "dvmInitAfterZygote failed"; 1572 } 1573 } 1574 1575 1576#ifndef NDEBUG 1577 if (!dvmTestHash()) 1578 ALOGE("dvmTestHash FAILED"); 1579 if (false /*noisy!*/ && !dvmTestIndirectRefTable()) 1580 ALOGE("dvmTestIndirectRefTable FAILED"); 1581#endif 1582 1583 if (dvmCheckException(dvmThreadSelf())) { 1584 dvmLogExceptionStackTrace(); 1585 return "Exception pending at end of VM initialization"; 1586 } 1587 1588 scopedShutdown.disarm(); 1589 return ""; 1590} 1591 1592static void loadJniLibrary(const char* name) { 1593 std::string mappedName(StringPrintf(OS_SHARED_LIB_FORMAT_STR, name)); 1594 char* reason = NULL; 1595 if (!dvmLoadNativeCode(mappedName.c_str(), NULL, &reason)) { 1596 ALOGE("dvmLoadNativeCode failed for \"%s\": %s", name, reason); 1597 dvmAbort(); 1598 } 1599} 1600 1601/* 1602 * Register java.* natives from our class libraries. We need to do 1603 * this after we're ready for JNI registration calls, but before we 1604 * do any class initialization. 1605 * 1606 * If we get this wrong, we will blow up in the ThreadGroup class init if 1607 * interpreted code makes any reference to System. It will likely do this 1608 * since it wants to do some java.io.File setup (e.g. for static in/out/err). 1609 * 1610 * We need to have gDvm.initializing raised here so that JNI FindClass 1611 * won't try to use the system/application class loader. 1612 */ 1613static bool registerSystemNatives(JNIEnv* pEnv) 1614{ 1615 // Main thread is always first in list. 1616 Thread* self = gDvm.threadList; 1617 1618 // Must set this before allowing JNI-based method registration. 1619 self->status = THREAD_NATIVE; 1620 1621 // Most JNI libraries can just use System.loadLibrary, but you can't 1622 // if you're the library that implements System.loadLibrary! 1623 loadJniLibrary("javacore"); 1624 loadJniLibrary("nativehelper"); 1625 1626 // Back to run mode. 1627 self->status = THREAD_RUNNING; 1628 1629 return true; 1630} 1631 1632 1633/* 1634 * Do zygote-mode-only initialization. 1635 */ 1636static bool initZygote() 1637{ 1638 /* zygote goes into its own process group */ 1639 setpgid(0,0); 1640 1641 // See storage config details at http://source.android.com/tech/storage/ 1642 // Create private mount namespace shared by all children 1643 if (unshare(CLONE_NEWNS) == -1) { 1644 SLOGE("Failed to unshare(): %s", strerror(errno)); 1645 return -1; 1646 } 1647 1648 // Mark rootfs as being a slave so that changes from default 1649 // namespace only flow into our children. 1650 if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) { 1651 SLOGE("Failed to mount() rootfs as MS_SLAVE: %s", strerror(errno)); 1652 return -1; 1653 } 1654 1655 // Create a staging tmpfs that is shared by our children; they will 1656 // bind mount storage into their respective private namespaces, which 1657 // are isolated from each other. 1658 const char* target_base = getenv("EMULATED_STORAGE_TARGET"); 1659 if (target_base != NULL) { 1660 if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV, 1661 "uid=0,gid=1028,mode=0050") == -1) { 1662 SLOGE("Failed to mount tmpfs to %s: %s", target_base, strerror(errno)); 1663 return -1; 1664 } 1665 } 1666 1667 return true; 1668} 1669 1670/* 1671 * Do non-zygote-mode initialization. This is done during VM init for 1672 * standard startup, or after a "zygote fork" when creating a new process. 1673 */ 1674bool dvmInitAfterZygote() 1675{ 1676 u8 startHeap, startQuit, startJdwp; 1677 u8 endHeap, endQuit, endJdwp; 1678 1679 startHeap = dvmGetRelativeTimeUsec(); 1680 1681 /* 1682 * Post-zygote heap initialization, including starting 1683 * the HeapWorker thread. 1684 */ 1685 if (!dvmGcStartupAfterZygote()) 1686 return false; 1687 1688 endHeap = dvmGetRelativeTimeUsec(); 1689 startQuit = dvmGetRelativeTimeUsec(); 1690 1691 /* start signal catcher thread that dumps stacks on SIGQUIT */ 1692 if (!gDvm.reduceSignals && !gDvm.noQuitHandler) { 1693 if (!dvmSignalCatcherStartup()) 1694 return false; 1695 } 1696 1697 /* start stdout/stderr copier, if requested */ 1698 if (gDvm.logStdio) { 1699 if (!dvmStdioConverterStartup()) 1700 return false; 1701 } 1702 1703 endQuit = dvmGetRelativeTimeUsec(); 1704 startJdwp = dvmGetRelativeTimeUsec(); 1705 1706 /* 1707 * Start JDWP thread. If the command-line debugger flags specified 1708 * "suspend=y", this will pause the VM. We probably want this to 1709 * come last. 1710 */ 1711 if (!initJdwp()) { 1712 ALOGD("JDWP init failed; continuing anyway"); 1713 } 1714 1715 endJdwp = dvmGetRelativeTimeUsec(); 1716 1717 ALOGV("thread-start heap=%d quit=%d jdwp=%d total=%d usec", 1718 (int)(endHeap-startHeap), (int)(endQuit-startQuit), 1719 (int)(endJdwp-startJdwp), (int)(endJdwp-startHeap)); 1720 1721#ifdef WITH_JIT 1722 if (gDvm.executionMode == kExecutionModeJit) { 1723 if (!dvmCompilerStartup()) 1724 return false; 1725 } 1726#endif 1727 1728 return true; 1729} 1730 1731/* 1732 * Prepare for a connection to a JDWP-compliant debugger. 1733 * 1734 * Note this needs to happen fairly late in the startup process, because 1735 * we need to have all of the java.* native methods registered (which in 1736 * turn requires JNI to be fully prepped). 1737 * 1738 * There are several ways to initialize: 1739 * server=n 1740 * We immediately try to connect to host:port. Bail on failure. On 1741 * success, send VM_START (suspending the VM if "suspend=y"). 1742 * server=y suspend=n 1743 * Passively listen for a debugger to connect. Return immediately. 1744 * server=y suspend=y 1745 * Wait until debugger connects. Send VM_START ASAP, suspending the 1746 * VM after the message is sent. 1747 * 1748 * This gets more complicated with a nonzero value for "timeout". 1749 */ 1750static bool initJdwp() 1751{ 1752 assert(!gDvm.zygote); 1753 1754 /* 1755 * Init JDWP if the debugger is enabled. This may connect out to a 1756 * debugger, passively listen for a debugger, or block waiting for a 1757 * debugger. 1758 */ 1759 if (gDvm.jdwpAllowed && gDvm.jdwpConfigured) { 1760 JdwpStartupParams params; 1761 1762 if (gDvm.jdwpHost != NULL) { 1763 if (strlen(gDvm.jdwpHost) >= sizeof(params.host)-1) { 1764 ALOGE("ERROR: hostname too long: '%s'", gDvm.jdwpHost); 1765 return false; 1766 } 1767 strcpy(params.host, gDvm.jdwpHost); 1768 } else { 1769 params.host[0] = '\0'; 1770 } 1771 params.transport = gDvm.jdwpTransport; 1772 params.server = gDvm.jdwpServer; 1773 params.suspend = gDvm.jdwpSuspend; 1774 params.port = gDvm.jdwpPort; 1775 1776 gDvm.jdwpState = dvmJdwpStartup(¶ms); 1777 if (gDvm.jdwpState == NULL) { 1778 ALOGW("WARNING: debugger thread failed to initialize"); 1779 /* TODO: ignore? fail? need to mimic "expected" behavior */ 1780 } 1781 } 1782 1783 /* 1784 * If a debugger has already attached, send the "welcome" message. This 1785 * may cause us to suspend all threads. 1786 */ 1787 if (dvmJdwpIsActive(gDvm.jdwpState)) { 1788 //dvmChangeStatus(NULL, THREAD_RUNNING); 1789 if (!dvmJdwpPostVMStart(gDvm.jdwpState, gDvm.jdwpSuspend)) { 1790 ALOGW("WARNING: failed to post 'start' message to debugger"); 1791 /* keep going */ 1792 } 1793 //dvmChangeStatus(NULL, THREAD_NATIVE); 1794 } 1795 1796 return true; 1797} 1798 1799/* 1800 * An alternative to JNI_CreateJavaVM/dvmStartup that does the first bit 1801 * of initialization and then returns with "initializing" still set. (Used 1802 * by DexOpt command-line utility.) 1803 * 1804 * Attempting to use JNI or internal natives will fail. It's best 1805 * if no bytecode gets executed, which means no <clinit>, which means 1806 * no exception-throwing. (In practice we need to initialize Class and 1807 * Object, and probably some exception classes.) 1808 * 1809 * Returns 0 on success. 1810 */ 1811int dvmPrepForDexOpt(const char* bootClassPath, DexOptimizerMode dexOptMode, 1812 DexClassVerifyMode verifyMode, int dexoptFlags) 1813{ 1814 gDvm.initializing = true; 1815 gDvm.optimizing = true; 1816 1817 /* configure signal handling */ 1818 blockSignals(); 1819 1820 /* set some defaults */ 1821 setCommandLineDefaults(); 1822 free(gDvm.bootClassPathStr); 1823 gDvm.bootClassPathStr = strdup(bootClassPath); 1824 1825 /* set opt/verify modes */ 1826 gDvm.dexOptMode = dexOptMode; 1827 gDvm.classVerifyMode = verifyMode; 1828 gDvm.generateRegisterMaps = (dexoptFlags & DEXOPT_GEN_REGISTER_MAPS) != 0; 1829 if (dexoptFlags & DEXOPT_SMP) { 1830 assert((dexoptFlags & DEXOPT_UNIPROCESSOR) == 0); 1831 gDvm.dexOptForSmp = true; 1832 } else if (dexoptFlags & DEXOPT_UNIPROCESSOR) { 1833 gDvm.dexOptForSmp = false; 1834 } else { 1835 gDvm.dexOptForSmp = (ANDROID_SMP != 0); 1836 } 1837 1838 /* 1839 * Initialize the heap, some basic thread control mutexes, and 1840 * get the bootclasspath prepped. 1841 * 1842 * We can't load any classes yet because we may not yet have a source 1843 * for things like java.lang.Object and java.lang.Class. 1844 */ 1845 if (!dvmGcStartup()) 1846 goto fail; 1847 if (!dvmThreadStartup()) 1848 goto fail; 1849 if (!dvmInlineNativeStartup()) 1850 goto fail; 1851 if (!dvmRegisterMapStartup()) 1852 goto fail; 1853 if (!dvmInstanceofStartup()) 1854 goto fail; 1855 if (!dvmClassStartup()) 1856 goto fail; 1857 1858 /* 1859 * We leave gDvm.initializing set to "true" so that, if we're not 1860 * able to process the "core" classes, we don't go into a death-spin 1861 * trying to throw a "class not found" exception. 1862 */ 1863 1864 return 0; 1865 1866fail: 1867 dvmShutdown(); 1868 return 1; 1869} 1870 1871 1872/* 1873 * All threads have stopped. Finish the shutdown procedure. 1874 * 1875 * We can also be called if startup fails partway through, so be prepared 1876 * to deal with partially initialized data. 1877 * 1878 * Free any storage allocated in gGlobals. 1879 * 1880 * We can't dlclose() shared libs we've loaded, because it's possible a 1881 * thread not associated with the VM is running code in one. 1882 * 1883 * This is called from the JNI DestroyJavaVM function, which can be 1884 * called from any thread. (In practice, this will usually run in the 1885 * same thread that started the VM, a/k/a the main thread, but we don't 1886 * want to assume that.) 1887 */ 1888void dvmShutdown() 1889{ 1890 ALOGV("VM shutting down"); 1891 1892 if (CALC_CACHE_STATS) 1893 dvmDumpAtomicCacheStats(gDvm.instanceofCache); 1894 1895 /* 1896 * Stop our internal threads. 1897 */ 1898 dvmGcThreadShutdown(); 1899 1900 if (gDvm.jdwpState != NULL) 1901 dvmJdwpShutdown(gDvm.jdwpState); 1902 free(gDvm.jdwpHost); 1903 gDvm.jdwpHost = NULL; 1904 free(gDvm.jniTrace); 1905 gDvm.jniTrace = NULL; 1906 free(gDvm.stackTraceFile); 1907 gDvm.stackTraceFile = NULL; 1908 1909 /* tell signal catcher to shut down if it was started */ 1910 dvmSignalCatcherShutdown(); 1911 1912 /* shut down stdout/stderr conversion */ 1913 dvmStdioConverterShutdown(); 1914 1915#ifdef WITH_JIT 1916 if (gDvm.executionMode == kExecutionModeJit) { 1917 /* shut down the compiler thread */ 1918 dvmCompilerShutdown(); 1919 } 1920#endif 1921 1922 /* 1923 * Kill any daemon threads that still exist. Actively-running threads 1924 * are likely to crash the process if they continue to execute while 1925 * the VM shuts down. 1926 */ 1927 dvmSlayDaemons(); 1928 1929 if (gDvm.verboseShutdown) 1930 ALOGD("VM cleaning up"); 1931 1932 dvmDebuggerShutdown(); 1933 dvmProfilingShutdown(); 1934 dvmJniShutdown(); 1935 dvmStringInternShutdown(); 1936 dvmThreadShutdown(); 1937 dvmClassShutdown(); 1938 dvmRegisterMapShutdown(); 1939 dvmInstanceofShutdown(); 1940 dvmInlineNativeShutdown(); 1941 dvmGcShutdown(); 1942 dvmAllocTrackerShutdown(); 1943 1944 /* these must happen AFTER dvmClassShutdown has walked through class data */ 1945 dvmNativeShutdown(); 1946 dvmInternalNativeShutdown(); 1947 1948 dvmFreeInlineSubsTable(); 1949 1950 free(gDvm.bootClassPathStr); 1951 free(gDvm.classPathStr); 1952 delete gDvm.properties; 1953 1954 freeAssertionCtrl(); 1955 1956 dvmQuasiAtomicsShutdown(); 1957 1958 /* 1959 * We want valgrind to report anything we forget to free as "definitely 1960 * lost". If there's a pointer in the global chunk, it would be reported 1961 * as "still reachable". Erasing the memory fixes this. 1962 * 1963 * This must be erased to zero if we want to restart the VM within this 1964 * process. 1965 */ 1966 memset(&gDvm, 0xcd, sizeof(gDvm)); 1967} 1968 1969 1970/* 1971 * fprintf() wrapper that calls through the JNI-specified vfprintf hook if 1972 * one was specified. 1973 */ 1974int dvmFprintf(FILE* fp, const char* format, ...) 1975{ 1976 va_list args; 1977 int result; 1978 1979 va_start(args, format); 1980 if (gDvm.vfprintfHook != NULL) 1981 result = (*gDvm.vfprintfHook)(fp, format, args); 1982 else 1983 result = vfprintf(fp, format, args); 1984 va_end(args); 1985 1986 return result; 1987} 1988 1989#ifdef __GLIBC__ 1990#include <execinfo.h> 1991/* 1992 * glibc-only stack dump function. Requires link with "--export-dynamic". 1993 * 1994 * TODO: move this into libs/cutils and make it work for all platforms. 1995 */ 1996void dvmPrintNativeBackTrace() 1997{ 1998 size_t MAX_STACK_FRAMES = 64; 1999 void* stackFrames[MAX_STACK_FRAMES]; 2000 size_t frameCount = backtrace(stackFrames, MAX_STACK_FRAMES); 2001 2002 /* 2003 * TODO: in practice, we may find that we should use backtrace_symbols_fd 2004 * to avoid allocation, rather than use our own custom formatting. 2005 */ 2006 char** strings = backtrace_symbols(stackFrames, frameCount); 2007 if (strings == NULL) { 2008 ALOGE("backtrace_symbols failed: %s", strerror(errno)); 2009 return; 2010 } 2011 2012 size_t i; 2013 for (i = 0; i < frameCount; ++i) { 2014 ALOGW("#%-2d %s", i, strings[i]); 2015 } 2016 free(strings); 2017} 2018#else 2019void dvmPrintNativeBackTrace() { 2020 /* Hopefully, you're on an Android device and debuggerd will do this. */ 2021} 2022#endif 2023 2024/* 2025 * Abort the VM. We get here on fatal errors. Try very hard not to use 2026 * this; whenever possible, return an error to somebody responsible. 2027 */ 2028void dvmAbort() 2029{ 2030 /* 2031 * Leave gDvm.lastMessage on the stack frame which can be decoded in the 2032 * tombstone file. This is for situations where we only have tombstone files 2033 * but no logs (ie b/5372634). 2034 * 2035 * For example, in the tombstone file you usually see this: 2036 * 2037 * #00 pc 00050ef2 /system/lib/libdvm.so (dvmAbort) 2038 * #01 pc 00077670 /system/lib/libdvm.so (_Z15dvmClassStartupv) 2039 * : 2040 * 2041 * stack: 2042 * : 2043 * #00 beed2658 00000000 2044 * beed265c 7379732f 2045 * beed2660 2f6d6574 2046 * beed2664 6d617266 2047 * beed2668 726f7765 2048 * beed266c 6f632f6b 2049 * beed2670 6a2e6572 2050 * beed2674 00007261 2051 * beed2678 00000000 2052 * 2053 * The ascii values between beed265c and beed2674 belongs to messageBuffer 2054 * and it can be decoded as "/system/framework/core.jar". 2055 */ 2056 const int messageLength = 512; 2057 char messageBuffer[messageLength] = {0}; 2058 int result = 0; 2059 2060 snprintf(messageBuffer, messageLength, "%s", gDvm.lastMessage); 2061 2062 /* So that messageBuffer[] looks like useful stuff to the compiler */ 2063 for (int i = 0; i < messageLength && messageBuffer[i]; i++) { 2064 result += messageBuffer[i]; 2065 } 2066 2067 ALOGE("VM aborting"); 2068 2069 fflush(NULL); // flush all open file buffers 2070 2071 /* JNI-supplied abort hook gets right of first refusal */ 2072 if (gDvm.abortHook != NULL) 2073 (*gDvm.abortHook)(); 2074 2075 /* 2076 * On the device, debuggerd will give us a stack trace. 2077 * On the host, we have to help ourselves. 2078 */ 2079 dvmPrintNativeBackTrace(); 2080 2081 /* 2082 * If we call abort(), all threads in the process receives a SIBABRT. 2083 * debuggerd dumps the stack trace of the main thread, whether or not 2084 * that was the thread that failed. 2085 * 2086 * By stuffing a value into a bogus address, we cause a segmentation 2087 * fault in the current thread, and get a useful log from debuggerd. 2088 * We can also trivially tell the difference between a VM crash and 2089 * a deliberate abort by looking at the fault address. 2090 */ 2091 *((char*)0xdeadd00d) = result; 2092 abort(); 2093 2094 /* notreached */ 2095} 2096