Init.cpp revision 5719d5c79558ffdbbb863ddcf61836221aba922d
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/wait.h> 27#include <unistd.h> 28 29#include "Dalvik.h" 30#include "test/Test.h" 31#include "mterp/Mterp.h" 32#include "Hash.h" 33 34#define kMinHeapStartSize (1*1024*1024) 35#define kMinHeapSize (2*1024*1024) 36#define kMaxHeapSize (1*1024*1024*1024) 37 38/* 39 * Register VM-agnostic native methods for system classes. 40 */ 41extern int jniRegisterSystemMethods(JNIEnv* env); 42 43/* fwd */ 44static bool registerSystemNatives(JNIEnv* pEnv); 45static bool initJdwp(); 46static bool initZygote(); 47 48 49/* global state */ 50struct DvmGlobals gDvm; 51struct DvmJniGlobals gDvmJni; 52 53/* JIT-specific global state */ 54#if defined(WITH_JIT) 55struct DvmJitGlobals gDvmJit; 56 57#if defined(WITH_JIT_TUNING) 58/* 59 * Track the number of hits in the inline cache for predicted chaining. 60 * Use an ugly global variable here since it is accessed in assembly code. 61 */ 62int gDvmICHitCount; 63#endif 64 65#endif 66 67/* 68 * Show usage. 69 * 70 * We follow the tradition of unhyphenated compound words. 71 */ 72static void usage(const char* progName) 73{ 74 dvmFprintf(stderr, "%s: [options] class [argument ...]\n", progName); 75 dvmFprintf(stderr, "%s: [options] -jar file.jar [argument ...]\n",progName); 76 dvmFprintf(stderr, "\n"); 77 dvmFprintf(stderr, "The following standard options are recognized:\n"); 78 dvmFprintf(stderr, " -classpath classpath\n"); 79 dvmFprintf(stderr, " -Dproperty=value\n"); 80 dvmFprintf(stderr, " -verbose:tag ('gc', 'jni', or 'class')\n"); 81 dvmFprintf(stderr, " -ea[:<package name>... |:<class name>]\n"); 82 dvmFprintf(stderr, " -da[:<package name>... |:<class name>]\n"); 83 dvmFprintf(stderr, " (-enableassertions, -disableassertions)\n"); 84 dvmFprintf(stderr, " -esa\n"); 85 dvmFprintf(stderr, " -dsa\n"); 86 dvmFprintf(stderr, 87 " (-enablesystemassertions, -disablesystemassertions)\n"); 88 dvmFprintf(stderr, " -showversion\n"); 89 dvmFprintf(stderr, " -help\n"); 90 dvmFprintf(stderr, "\n"); 91 dvmFprintf(stderr, "The following extended options are recognized:\n"); 92 dvmFprintf(stderr, " -Xrunjdwp:<options>\n"); 93 dvmFprintf(stderr, " -Xbootclasspath:bootclasspath\n"); 94 dvmFprintf(stderr, " -Xcheck:tag (e.g. 'jni')\n"); 95 dvmFprintf(stderr, " -XmsN (min heap, must be multiple of 1K, >= 1MB)\n"); 96 dvmFprintf(stderr, " -XmxN (max heap, must be multiple of 1K, >= 2MB)\n"); 97 dvmFprintf(stderr, " -XssN (stack size, >= %dKB, <= %dKB)\n", 98 kMinStackSize / 1024, kMaxStackSize / 1024); 99 dvmFprintf(stderr, " -Xverify:{none,remote,all}\n"); 100 dvmFprintf(stderr, " -Xrs\n"); 101#if defined(WITH_JIT) 102 dvmFprintf(stderr, 103 " -Xint (extended to accept ':portable', ':fast' and ':jit')\n"); 104#else 105 dvmFprintf(stderr, 106 " -Xint (extended to accept ':portable' and ':fast')\n"); 107#endif 108 dvmFprintf(stderr, "\n"); 109 dvmFprintf(stderr, "These are unique to Dalvik:\n"); 110 dvmFprintf(stderr, " -Xzygote\n"); 111 dvmFprintf(stderr, " -Xdexopt:{none,verified,all,full}\n"); 112 dvmFprintf(stderr, " -Xnoquithandler\n"); 113 dvmFprintf(stderr, 114 " -Xjnigreflimit:N (must be multiple of 100, >= 200)\n"); 115 dvmFprintf(stderr, " -Xjniopts:{warnonly,forcecopy}\n"); 116 dvmFprintf(stderr, " -Xjnitrace:substring (eg NativeClass or nativeMethod)\n"); 117 dvmFprintf(stderr, " -Xdeadlockpredict:{off,warn,err,abort}\n"); 118 dvmFprintf(stderr, " -Xstacktracefile:<filename>\n"); 119 dvmFprintf(stderr, " -Xgc:[no]precise\n"); 120 dvmFprintf(stderr, " -Xgc:[no]preverify\n"); 121 dvmFprintf(stderr, " -Xgc:[no]postverify\n"); 122 dvmFprintf(stderr, " -Xgc:[no]concurrent\n"); 123 dvmFprintf(stderr, " -Xgc:[no]verifycardtable\n"); 124 dvmFprintf(stderr, " -XX:+DisableExplicitGC\n"); 125 dvmFprintf(stderr, " -X[no]genregmap\n"); 126 dvmFprintf(stderr, " -Xverifyopt:[no]checkmon\n"); 127 dvmFprintf(stderr, " -Xcheckdexsum\n"); 128#if defined(WITH_JIT) 129 dvmFprintf(stderr, " -Xincludeselectedop\n"); 130 dvmFprintf(stderr, " -Xjitop:hexopvalue[-endvalue]" 131 "[,hexopvalue[-endvalue]]*\n"); 132 dvmFprintf(stderr, " -Xincludeselectedmethod\n"); 133 dvmFprintf(stderr, " -Xjitthreshold:decimalvalue\n"); 134 dvmFprintf(stderr, " -Xjitblocking\n"); 135 dvmFprintf(stderr, " -Xjitmethod:signature[,signature]* " 136 "(eg Ljava/lang/String\\;replace)\n"); 137 dvmFprintf(stderr, " -Xjitcheckcg\n"); 138 dvmFprintf(stderr, " -Xjitverbose\n"); 139 dvmFprintf(stderr, " -Xjitprofile\n"); 140 dvmFprintf(stderr, " -Xjitdisableopt\n"); 141 dvmFprintf(stderr, " -Xjitsuspendpoll\n"); 142#endif 143 dvmFprintf(stderr, "\n"); 144 dvmFprintf(stderr, "Configured with:" 145 " debugger" 146 " profiler" 147 " hprof" 148#ifdef WITH_TRACKREF_CHECKS 149 " trackref_checks" 150#endif 151#ifdef WITH_INSTR_CHECKS 152 " instr_checks" 153#endif 154#ifdef WITH_EXTRA_OBJECT_VALIDATION 155 " extra_object_validation" 156#endif 157#ifdef WITH_EXTRA_GC_CHECKS 158 " extra_gc_checks" 159#endif 160#if !defined(NDEBUG) && defined(WITH_DALVIK_ASSERT) 161 " dalvik_assert" 162#endif 163#ifdef WITH_JNI_STACK_CHECK 164 " jni_stack_check" 165#endif 166#ifdef EASY_GDB 167 " easy_gdb" 168#endif 169#ifdef CHECK_MUTEX 170 " check_mutex" 171#endif 172#if defined(WITH_JIT) 173 " jit(" ARCH_VARIANT ")" 174#endif 175#if defined(WITH_SELF_VERIFICATION) 176 " self_verification" 177#endif 178#if ANDROID_SMP != 0 179 " smp" 180#endif 181 ); 182#ifdef DVM_SHOW_EXCEPTION 183 dvmFprintf(stderr, " show_exception=%d", DVM_SHOW_EXCEPTION); 184#endif 185 dvmFprintf(stderr, "\n\n"); 186} 187 188/* 189 * Show helpful information on JDWP options. 190 */ 191static void showJdwpHelp() 192{ 193 dvmFprintf(stderr, 194 "Example: -Xrunjdwp:transport=dt_socket,address=8000,server=y\n"); 195 dvmFprintf(stderr, 196 "Example: -Xrunjdwp:transport=dt_socket,address=localhost:6500,server=n\n"); 197} 198 199/* 200 * Show version and copyright info. 201 */ 202static void showVersion() 203{ 204 dvmFprintf(stdout, "DalvikVM version %d.%d.%d\n", 205 DALVIK_MAJOR_VERSION, DALVIK_MINOR_VERSION, DALVIK_BUG_VERSION); 206 dvmFprintf(stdout, 207 "Copyright (C) 2007 The Android Open Source Project\n\n" 208 "This software is built from source code licensed under the " 209 "Apache License,\n" 210 "Version 2.0 (the \"License\"). You may obtain a copy of the " 211 "License at\n\n" 212 " http://www.apache.org/licenses/LICENSE-2.0\n\n" 213 "See the associated NOTICE file for this software for further " 214 "details.\n"); 215} 216 217/* 218 * Parse a string of the form /[0-9]+[kKmMgG]?/, which is used to specify 219 * memory sizes. [kK] indicates kilobytes, [mM] megabytes, and 220 * [gG] gigabytes. 221 * 222 * "s" should point just past the "-Xm?" part of the string. 223 * "min" specifies the lowest acceptable value described by "s". 224 * "div" specifies a divisor, e.g. 1024 if the value must be a multiple 225 * of 1024. 226 * 227 * The spec says the -Xmx and -Xms options must be multiples of 1024. It 228 * doesn't say anything about -Xss. 229 * 230 * Returns 0 (a useless size) if "s" is malformed or specifies a low or 231 * non-evenly-divisible value. 232 */ 233static size_t parseMemOption(const char *s, size_t div) 234{ 235 /* strtoul accepts a leading [+-], which we don't want, 236 * so make sure our string starts with a decimal digit. 237 */ 238 if (isdigit(*s)) { 239 const char *s2; 240 size_t val; 241 242 val = strtoul(s, (char **)&s2, 10); 243 if (s2 != s) { 244 /* s2 should be pointing just after the number. 245 * If this is the end of the string, the user 246 * has specified a number of bytes. Otherwise, 247 * there should be exactly one more character 248 * that specifies a multiplier. 249 */ 250 if (*s2 != '\0') { 251 char c; 252 253 /* The remainder of the string is either a single multiplier 254 * character, or nothing to indicate that the value is in 255 * bytes. 256 */ 257 c = *s2++; 258 if (*s2 == '\0') { 259 size_t mul; 260 261 if (c == '\0') { 262 mul = 1; 263 } else if (c == 'k' || c == 'K') { 264 mul = 1024; 265 } else if (c == 'm' || c == 'M') { 266 mul = 1024 * 1024; 267 } else if (c == 'g' || c == 'G') { 268 mul = 1024 * 1024 * 1024; 269 } else { 270 /* Unknown multiplier character. 271 */ 272 return 0; 273 } 274 275 if (val <= SIZE_MAX / mul) { 276 val *= mul; 277 } else { 278 /* Clamp to a multiple of 1024. 279 */ 280 val = SIZE_MAX & ~(1024-1); 281 } 282 } else { 283 /* There's more than one character after the 284 * numeric part. 285 */ 286 return 0; 287 } 288 } 289 290 /* The man page says that a -Xm value must be 291 * a multiple of 1024. 292 */ 293 if (val % div == 0) { 294 return val; 295 } 296 } 297 } 298 299 return 0; 300} 301 302/* 303 * Handle one of the JDWP name/value pairs. 304 * 305 * JDWP options are: 306 * help: if specified, show help message and bail 307 * transport: may be dt_socket or dt_shmem 308 * address: for dt_socket, "host:port", or just "port" when listening 309 * server: if "y", wait for debugger to attach; if "n", attach to debugger 310 * timeout: how long to wait for debugger to connect / listen 311 * 312 * Useful with server=n (these aren't supported yet): 313 * onthrow=<exception-name>: connect to debugger when exception thrown 314 * onuncaught=y|n: connect to debugger when uncaught exception thrown 315 * launch=<command-line>: launch the debugger itself 316 * 317 * The "transport" option is required, as is "address" if server=n. 318 */ 319static bool handleJdwpOption(const char* name, const char* value) 320{ 321 if (strcmp(name, "transport") == 0) { 322 if (strcmp(value, "dt_socket") == 0) { 323 gDvm.jdwpTransport = kJdwpTransportSocket; 324 } else if (strcmp(value, "dt_android_adb") == 0) { 325 gDvm.jdwpTransport = kJdwpTransportAndroidAdb; 326 } else { 327 LOGE("JDWP transport '%s' not supported", value); 328 return false; 329 } 330 } else if (strcmp(name, "server") == 0) { 331 if (*value == 'n') 332 gDvm.jdwpServer = false; 333 else if (*value == 'y') 334 gDvm.jdwpServer = true; 335 else { 336 LOGE("JDWP option 'server' must be 'y' or 'n'"); 337 return false; 338 } 339 } else if (strcmp(name, "suspend") == 0) { 340 if (*value == 'n') 341 gDvm.jdwpSuspend = false; 342 else if (*value == 'y') 343 gDvm.jdwpSuspend = true; 344 else { 345 LOGE("JDWP option 'suspend' must be 'y' or 'n'"); 346 return false; 347 } 348 } else if (strcmp(name, "address") == 0) { 349 /* this is either <port> or <host>:<port> */ 350 const char* colon = strchr(value, ':'); 351 char* end; 352 long port; 353 354 if (colon != NULL) { 355 free(gDvm.jdwpHost); 356 gDvm.jdwpHost = (char*) malloc(colon - value +1); 357 strncpy(gDvm.jdwpHost, value, colon - value +1); 358 gDvm.jdwpHost[colon-value] = '\0'; 359 value = colon + 1; 360 } 361 if (*value == '\0') { 362 LOGE("JDWP address missing port"); 363 return false; 364 } 365 port = strtol(value, &end, 10); 366 if (*end != '\0') { 367 LOGE("JDWP address has junk in port field '%s'", value); 368 return false; 369 } 370 gDvm.jdwpPort = port; 371 } else if (strcmp(name, "launch") == 0 || 372 strcmp(name, "onthrow") == 0 || 373 strcmp(name, "oncaught") == 0 || 374 strcmp(name, "timeout") == 0) 375 { 376 /* valid but unsupported */ 377 LOGI("Ignoring JDWP option '%s'='%s'", name, value); 378 } else { 379 LOGI("Ignoring unrecognized JDWP option '%s'='%s'", name, value); 380 } 381 382 return true; 383} 384 385/* 386 * Parse the latter half of a -Xrunjdwp/-agentlib:jdwp= string, e.g.: 387 * "transport=dt_socket,address=8000,server=y,suspend=n" 388 */ 389static bool parseJdwpOptions(const char* str) 390{ 391 char* mangle = strdup(str); 392 char* name = mangle; 393 bool result = false; 394 395 /* 396 * Process all of the name=value pairs. 397 */ 398 while (true) { 399 char* value; 400 char* comma; 401 402 value = strchr(name, '='); 403 if (value == NULL) { 404 LOGE("JDWP opts: garbage at '%s'", name); 405 goto bail; 406 } 407 408 comma = strchr(name, ','); // use name, not value, for safety 409 if (comma != NULL) { 410 if (comma < value) { 411 LOGE("JDWP opts: found comma before '=' in '%s'", mangle); 412 goto bail; 413 } 414 *comma = '\0'; 415 } 416 417 *value++ = '\0'; // stomp the '=' 418 419 if (!handleJdwpOption(name, value)) 420 goto bail; 421 422 if (comma == NULL) { 423 /* out of options */ 424 break; 425 } 426 name = comma+1; 427 } 428 429 /* 430 * Make sure the combination of arguments makes sense. 431 */ 432 if (gDvm.jdwpTransport == kJdwpTransportUnknown) { 433 LOGE("JDWP opts: must specify transport"); 434 goto bail; 435 } 436 if (!gDvm.jdwpServer && (gDvm.jdwpHost == NULL || gDvm.jdwpPort == 0)) { 437 LOGE("JDWP opts: when server=n, must specify host and port"); 438 goto bail; 439 } 440 // transport mandatory 441 // outbound server address 442 443 gDvm.jdwpConfigured = true; 444 result = true; 445 446bail: 447 free(mangle); 448 return result; 449} 450 451/* 452 * Handle one of the four kinds of assertion arguments. 453 * 454 * "pkgOrClass" is the last part of an enable/disable line. For a package 455 * the arg looks like "-ea:com.google.fubar...", for a class it looks 456 * like "-ea:com.google.fubar.Wahoo". The string we get starts at the ':'. 457 * 458 * For system assertions (-esa/-dsa), "pkgOrClass" is NULL. 459 * 460 * Multiple instances of these arguments can be specified, e.g. you can 461 * enable assertions for a package and then disable them for one class in 462 * the package. 463 */ 464static bool enableAssertions(const char* pkgOrClass, bool enable) 465{ 466 AssertionControl* pCtrl = &gDvm.assertionCtrl[gDvm.assertionCtrlCount++]; 467 pCtrl->enable = enable; 468 469 if (pkgOrClass == NULL) { 470 /* enable or disable for all system classes */ 471 pCtrl->isPackage = false; 472 pCtrl->pkgOrClass = NULL; 473 pCtrl->pkgOrClassLen = 0; 474 } else { 475 if (*pkgOrClass == '\0') { 476 /* global enable/disable for all but system */ 477 pCtrl->isPackage = false; 478 pCtrl->pkgOrClass = strdup(""); 479 pCtrl->pkgOrClassLen = 0; 480 } else { 481 pCtrl->pkgOrClass = dvmDotToSlash(pkgOrClass+1); // skip ':' 482 if (pCtrl->pkgOrClass == NULL) { 483 /* can happen if class name includes an illegal '/' */ 484 LOGW("Unable to process assertion arg '%s'", pkgOrClass); 485 return false; 486 } 487 488 int len = strlen(pCtrl->pkgOrClass); 489 if (len >= 3 && strcmp(pCtrl->pkgOrClass + len-3, "///") == 0) { 490 /* mark as package, truncate two of the three slashes */ 491 pCtrl->isPackage = true; 492 *(pCtrl->pkgOrClass + len-2) = '\0'; 493 pCtrl->pkgOrClassLen = len - 2; 494 } else { 495 /* just a class */ 496 pCtrl->isPackage = false; 497 pCtrl->pkgOrClassLen = len; 498 } 499 } 500 } 501 502 return true; 503} 504 505/* 506 * Turn assertions on when requested to do so by the Zygote. 507 * 508 * This is a bit sketchy. We can't (easily) go back and fiddle with all 509 * of the classes that have already been initialized, so this only 510 * affects classes that have yet to be loaded. If some or all assertions 511 * have been enabled through some other means, we don't want to mess with 512 * it here, so we do nothing. Finally, we assume that there's room in 513 * "assertionCtrl" to hold at least one entry; this is guaranteed by the 514 * allocator. 515 * 516 * This must only be called from the main thread during zygote init. 517 */ 518void dvmLateEnableAssertions() 519{ 520 if (gDvm.assertionCtrl == NULL) { 521 LOGD("Not late-enabling assertions: no assertionCtrl array"); 522 return; 523 } else if (gDvm.assertionCtrlCount != 0) { 524 LOGD("Not late-enabling assertions: some asserts already configured"); 525 return; 526 } 527 LOGD("Late-enabling assertions"); 528 529 /* global enable for all but system */ 530 AssertionControl* pCtrl = gDvm.assertionCtrl; 531 pCtrl->pkgOrClass = strdup(""); 532 pCtrl->pkgOrClassLen = 0; 533 pCtrl->isPackage = false; 534 pCtrl->enable = true; 535 gDvm.assertionCtrlCount = 1; 536} 537 538 539/* 540 * Release memory associated with the AssertionCtrl array. 541 */ 542static void freeAssertionCtrl() 543{ 544 int i; 545 546 for (i = 0; i < gDvm.assertionCtrlCount; i++) 547 free(gDvm.assertionCtrl[i].pkgOrClass); 548 free(gDvm.assertionCtrl); 549} 550 551#if defined(WITH_JIT) 552/* Parse -Xjitop to selectively turn on/off certain opcodes for JIT */ 553static void processXjitop(const char *opt) 554{ 555 if (opt[7] == ':') { 556 const char *startPtr = &opt[8]; 557 char *endPtr = NULL; 558 559 do { 560 long startValue, endValue; 561 562 startValue = strtol(startPtr, &endPtr, 16); 563 if (startPtr != endPtr) { 564 /* Just in case value is out of range */ 565 startValue %= kNumPackedOpcodes; 566 567 if (*endPtr == '-') { 568 endValue = strtol(endPtr+1, &endPtr, 16); 569 endValue %= kNumPackedOpcodes; 570 } else { 571 endValue = startValue; 572 } 573 574 for (; startValue <= endValue; startValue++) { 575 LOGW("Dalvik opcode %x is selected for debugging", 576 (unsigned int) startValue); 577 /* Mark the corresponding bit to 1 */ 578 gDvmJit.opList[startValue >> 3] |= 1 << (startValue & 0x7); 579 } 580 581 if (*endPtr == 0) { 582 break; 583 } 584 585 startPtr = endPtr + 1; 586 587 continue; 588 } else { 589 if (*endPtr != 0) { 590 dvmFprintf(stderr, 591 "Warning: Unrecognized opcode value substring " 592 "%s\n", endPtr); 593 } 594 break; 595 } 596 } while (1); 597 } else { 598 int i; 599 for (i = 0; i < (kNumPackedOpcodes+7)/8; i++) { 600 gDvmJit.opList[i] = 0xff; 601 } 602 dvmFprintf(stderr, "Warning: select all opcodes\n"); 603 } 604} 605 606/* Parse -Xjitmethod to selectively turn on/off certain methods for JIT */ 607static void processXjitmethod(const char *opt) 608{ 609 char *buf = strdup(&opt[12]); 610 char *start, *end; 611 612 gDvmJit.methodTable = dvmHashTableCreate(8, NULL); 613 614 start = buf; 615 /* 616 * Break comma-separated method signatures and enter them into the hash 617 * table individually. 618 */ 619 do { 620 int hashValue; 621 622 end = strchr(start, ','); 623 if (end) { 624 *end = 0; 625 } 626 627 hashValue = dvmComputeUtf8Hash(start); 628 629 dvmHashTableLookup(gDvmJit.methodTable, hashValue, 630 strdup(start), 631 (HashCompareFunc) strcmp, true); 632 if (end) { 633 start = end + 1; 634 } else { 635 break; 636 } 637 } while (1); 638 free(buf); 639} 640#endif 641 642/* 643 * Process an argument vector full of options. Unlike standard C programs, 644 * argv[0] does not contain the name of the program. 645 * 646 * If "ignoreUnrecognized" is set, we ignore options starting with "-X" or "_" 647 * that we don't recognize. Otherwise, we return with an error as soon as 648 * we see anything we can't identify. 649 * 650 * Returns 0 on success, -1 on failure, and 1 for the special case of 651 * "-version" where we want to stop without showing an error message. 652 */ 653static int processOptions(int argc, const char* const argv[], 654 bool ignoreUnrecognized) 655{ 656 int i; 657 658 LOGV("VM options (%d):", argc); 659 for (i = 0; i < argc; i++) 660 LOGV(" %d: '%s'", i, argv[i]); 661 662 /* 663 * Over-allocate AssertionControl array for convenience. If allocated, 664 * the array must be able to hold at least one entry, so that the 665 * zygote-time activation can do its business. 666 */ 667 assert(gDvm.assertionCtrl == NULL); 668 if (argc > 0) { 669 gDvm.assertionCtrl = 670 (AssertionControl*) malloc(sizeof(AssertionControl) * argc); 671 if (gDvm.assertionCtrl == NULL) 672 return -1; 673 assert(gDvm.assertionCtrlCount == 0); 674 } 675 676 for (i = 0; i < argc; i++) { 677 if (strcmp(argv[i], "-help") == 0) { 678 /* show usage and stop */ 679 return -1; 680 681 } else if (strcmp(argv[i], "-version") == 0) { 682 /* show version and stop */ 683 showVersion(); 684 return 1; 685 } else if (strcmp(argv[i], "-showversion") == 0) { 686 /* show version and continue */ 687 showVersion(); 688 689 } else if (strcmp(argv[i], "-classpath") == 0 || 690 strcmp(argv[i], "-cp") == 0) 691 { 692 /* set classpath */ 693 if (i == argc-1) { 694 dvmFprintf(stderr, "Missing classpath path list\n"); 695 return -1; 696 } 697 free(gDvm.classPathStr); /* in case we have compiled-in default */ 698 gDvm.classPathStr = strdup(argv[++i]); 699 700 } else if (strncmp(argv[i], "-Xbootclasspath:", 701 sizeof("-Xbootclasspath:")-1) == 0) 702 { 703 /* set bootclasspath */ 704 const char* path = argv[i] + sizeof("-Xbootclasspath:")-1; 705 706 if (*path == '\0') { 707 dvmFprintf(stderr, "Missing bootclasspath path list\n"); 708 return -1; 709 } 710 free(gDvm.bootClassPathStr); 711 gDvm.bootClassPathStr = strdup(path); 712 713 } else if (strncmp(argv[i], "-Xbootclasspath/a:", 714 sizeof("-Xbootclasspath/a:")-1) == 0) { 715 const char* appPath = argv[i] + sizeof("-Xbootclasspath/a:")-1; 716 717 if (*(appPath) == '\0') { 718 dvmFprintf(stderr, "Missing appending bootclasspath path list\n"); 719 return -1; 720 } 721 char* allPath; 722 723 if (asprintf(&allPath, "%s:%s", gDvm.bootClassPathStr, appPath) < 0) { 724 dvmFprintf(stderr, "Can't append to bootclasspath path list\n"); 725 return -1; 726 } 727 free(gDvm.bootClassPathStr); 728 gDvm.bootClassPathStr = allPath; 729 730 } else if (strncmp(argv[i], "-Xbootclasspath/p:", 731 sizeof("-Xbootclasspath/p:")-1) == 0) { 732 const char* prePath = argv[i] + sizeof("-Xbootclasspath/p:")-1; 733 734 if (*(prePath) == '\0') { 735 dvmFprintf(stderr, "Missing prepending bootclasspath path list\n"); 736 return -1; 737 } 738 char* allPath; 739 740 if (asprintf(&allPath, "%s:%s", prePath, gDvm.bootClassPathStr) < 0) { 741 dvmFprintf(stderr, "Can't prepend to bootclasspath path list\n"); 742 return -1; 743 } 744 free(gDvm.bootClassPathStr); 745 gDvm.bootClassPathStr = allPath; 746 747 } else if (strncmp(argv[i], "-D", 2) == 0) { 748 /* Properties are handled in managed code. We just check syntax. */ 749 if (strchr(argv[i], '=') == NULL) { 750 dvmFprintf(stderr, "Bad system property setting: \"%s\"\n", 751 argv[i]); 752 return -1; 753 } 754 gDvm.properties->push_back(argv[i] + 2); 755 756 } else if (strcmp(argv[i], "-jar") == 0) { 757 // TODO: handle this; name of jar should be in argv[i+1] 758 dvmFprintf(stderr, "-jar not yet handled\n"); 759 assert(false); 760 761 } else if (strncmp(argv[i], "-Xms", 4) == 0) { 762 size_t val = parseMemOption(argv[i]+4, 1024); 763 if (val != 0) { 764 if (val >= kMinHeapStartSize && val <= kMaxHeapSize) { 765 gDvm.heapStartingSize = val; 766 } else { 767 dvmFprintf(stderr, 768 "Invalid -Xms '%s', range is %dKB to %dKB\n", 769 argv[i], kMinHeapStartSize/1024, kMaxHeapSize/1024); 770 return -1; 771 } 772 } else { 773 dvmFprintf(stderr, "Invalid -Xms option '%s'\n", argv[i]); 774 return -1; 775 } 776 } else if (strncmp(argv[i], "-Xmx", 4) == 0) { 777 size_t val = parseMemOption(argv[i]+4, 1024); 778 if (val != 0) { 779 if (val >= kMinHeapSize && val <= kMaxHeapSize) { 780 gDvm.heapMaximumSize = val; 781 } else { 782 dvmFprintf(stderr, 783 "Invalid -Xmx '%s', range is %dKB to %dKB\n", 784 argv[i], kMinHeapSize/1024, kMaxHeapSize/1024); 785 return -1; 786 } 787 } else { 788 dvmFprintf(stderr, "Invalid -Xmx option '%s'\n", argv[i]); 789 return -1; 790 } 791 } else if (strncmp(argv[i], "-XX:HeapGrowthLimit=", 20) == 0) { 792 size_t val = parseMemOption(argv[i] + 20, 1024); 793 if (val != 0) { 794 gDvm.heapGrowthLimit = val; 795 } else { 796 dvmFprintf(stderr, "Invalid -XX:HeapGrowthLimit option '%s'\n", argv[i]); 797 return -1; 798 } 799 } else if (strncmp(argv[i], "-Xss", 4) == 0) { 800 size_t val = parseMemOption(argv[i]+4, 1); 801 if (val != 0) { 802 if (val >= kMinStackSize && val <= kMaxStackSize) { 803 gDvm.stackSize = val; 804 } else { 805 dvmFprintf(stderr, "Invalid -Xss '%s', range is %d to %d\n", 806 argv[i], kMinStackSize, kMaxStackSize); 807 return -1; 808 } 809 } else { 810 dvmFprintf(stderr, "Invalid -Xss option '%s'\n", argv[i]); 811 return -1; 812 } 813 814 } else if (strncmp(argv[i], "-XX:+DisableExplicitGC", 22) == 0) { 815 gDvm.disableExplicitGc = true; 816 } else if (strcmp(argv[i], "-verbose") == 0 || 817 strcmp(argv[i], "-verbose:class") == 0) 818 { 819 // JNI spec says "-verbose:gc,class" is valid, but cmd line 820 // doesn't work that way; may want to support. 821 gDvm.verboseClass = true; 822 } else if (strcmp(argv[i], "-verbose:jni") == 0) { 823 gDvm.verboseJni = true; 824 } else if (strcmp(argv[i], "-verbose:gc") == 0) { 825 gDvm.verboseGc = true; 826 } else if (strcmp(argv[i], "-verbose:shutdown") == 0) { 827 gDvm.verboseShutdown = true; 828 829 } else if (strncmp(argv[i], "-enableassertions", 17) == 0) { 830 enableAssertions(argv[i] + 17, true); 831 } else if (strncmp(argv[i], "-ea", 3) == 0) { 832 enableAssertions(argv[i] + 3, true); 833 } else if (strncmp(argv[i], "-disableassertions", 18) == 0) { 834 enableAssertions(argv[i] + 18, false); 835 } else if (strncmp(argv[i], "-da", 3) == 0) { 836 enableAssertions(argv[i] + 3, false); 837 } else if (strcmp(argv[i], "-enablesystemassertions") == 0 || 838 strcmp(argv[i], "-esa") == 0) 839 { 840 enableAssertions(NULL, true); 841 } else if (strcmp(argv[i], "-disablesystemassertions") == 0 || 842 strcmp(argv[i], "-dsa") == 0) 843 { 844 enableAssertions(NULL, false); 845 846 } else if (strncmp(argv[i], "-Xcheck:jni", 11) == 0) { 847 /* nothing to do now -- was handled during JNI init */ 848 849 } else if (strcmp(argv[i], "-Xdebug") == 0) { 850 /* accept but ignore */ 851 852 } else if (strncmp(argv[i], "-Xrunjdwp:", 10) == 0 || 853 strncmp(argv[i], "-agentlib:jdwp=", 15) == 0) 854 { 855 const char* tail; 856 857 if (argv[i][1] == 'X') 858 tail = argv[i] + 10; 859 else 860 tail = argv[i] + 15; 861 862 if (strncmp(tail, "help", 4) == 0 || !parseJdwpOptions(tail)) { 863 showJdwpHelp(); 864 return 1; 865 } 866 } else if (strcmp(argv[i], "-Xrs") == 0) { 867 gDvm.reduceSignals = true; 868 } else if (strcmp(argv[i], "-Xnoquithandler") == 0) { 869 /* disables SIGQUIT handler thread while still blocking SIGQUIT */ 870 /* (useful if we don't want thread but system still signals us) */ 871 gDvm.noQuitHandler = true; 872 } else if (strcmp(argv[i], "-Xzygote") == 0) { 873 gDvm.zygote = true; 874#if defined(WITH_JIT) 875 gDvmJit.runningInAndroidFramework = true; 876#endif 877 } else if (strncmp(argv[i], "-Xdexopt:", 9) == 0) { 878 if (strcmp(argv[i] + 9, "none") == 0) 879 gDvm.dexOptMode = OPTIMIZE_MODE_NONE; 880 else if (strcmp(argv[i] + 9, "verified") == 0) 881 gDvm.dexOptMode = OPTIMIZE_MODE_VERIFIED; 882 else if (strcmp(argv[i] + 9, "all") == 0) 883 gDvm.dexOptMode = OPTIMIZE_MODE_ALL; 884 else if (strcmp(argv[i] + 9, "full") == 0) 885 gDvm.dexOptMode = OPTIMIZE_MODE_FULL; 886 else { 887 dvmFprintf(stderr, "Unrecognized dexopt option '%s'\n",argv[i]); 888 return -1; 889 } 890 } else if (strncmp(argv[i], "-Xverify:", 9) == 0) { 891 if (strcmp(argv[i] + 9, "none") == 0) 892 gDvm.classVerifyMode = VERIFY_MODE_NONE; 893 else if (strcmp(argv[i] + 9, "remote") == 0) 894 gDvm.classVerifyMode = VERIFY_MODE_REMOTE; 895 else if (strcmp(argv[i] + 9, "all") == 0) 896 gDvm.classVerifyMode = VERIFY_MODE_ALL; 897 else { 898 dvmFprintf(stderr, "Unrecognized verify option '%s'\n",argv[i]); 899 return -1; 900 } 901 } else if (strncmp(argv[i], "-Xjnigreflimit:", 15) == 0) { 902 int lim = atoi(argv[i] + 15); 903 if (lim < 200 || (lim % 100) != 0) { 904 dvmFprintf(stderr, "Bad value for -Xjnigreflimit: '%s'\n", 905 argv[i]+15); 906 return -1; 907 } 908 gDvm.jniGrefLimit = lim; 909 } else if (strncmp(argv[i], "-Xjnitrace:", 11) == 0) { 910 gDvm.jniTrace = strdup(argv[i] + 11); 911 } else if (strcmp(argv[i], "-Xlog-stdio") == 0) { 912 gDvm.logStdio = true; 913 914 } else if (strncmp(argv[i], "-Xint", 5) == 0) { 915 if (argv[i][5] == ':') { 916 if (strcmp(argv[i] + 6, "portable") == 0) 917 gDvm.executionMode = kExecutionModeInterpPortable; 918 else if (strcmp(argv[i] + 6, "fast") == 0) 919 gDvm.executionMode = kExecutionModeInterpFast; 920#ifdef WITH_JIT 921 else if (strcmp(argv[i] + 6, "jit") == 0) 922 gDvm.executionMode = kExecutionModeJit; 923#endif 924 else { 925 dvmFprintf(stderr, 926 "Warning: Unrecognized interpreter mode %s\n",argv[i]); 927 /* keep going */ 928 } 929 } else { 930 /* disable JIT if it was enabled by default */ 931 gDvm.executionMode = kExecutionModeInterpFast; 932 } 933 934 } else if (strncmp(argv[i], "-Xlockprofthreshold:", 20) == 0) { 935 gDvm.lockProfThreshold = atoi(argv[i] + 20); 936 937#ifdef WITH_JIT 938 } else if (strncmp(argv[i], "-Xjitop", 7) == 0) { 939 processXjitop(argv[i]); 940 } else if (strncmp(argv[i], "-Xjitmethod", 11) == 0) { 941 processXjitmethod(argv[i]); 942 } else if (strncmp(argv[i], "-Xjitblocking", 13) == 0) { 943 gDvmJit.blockingMode = true; 944 } else if (strncmp(argv[i], "-Xjitthreshold:", 15) == 0) { 945 gDvmJit.threshold = atoi(argv[i] + 15); 946 } else if (strncmp(argv[i], "-Xincludeselectedop", 19) == 0) { 947 gDvmJit.includeSelectedOp = true; 948 } else if (strncmp(argv[i], "-Xincludeselectedmethod", 23) == 0) { 949 gDvmJit.includeSelectedMethod = true; 950 } else if (strncmp(argv[i], "-Xjitcheckcg", 12) == 0) { 951 gDvmJit.checkCallGraph = true; 952 /* Need to enable blocking mode due to stack crawling */ 953 gDvmJit.blockingMode = true; 954 } else if (strncmp(argv[i], "-Xjitverbose", 12) == 0) { 955 gDvmJit.printMe = true; 956 } else if (strncmp(argv[i], "-Xjitprofile", 12) == 0) { 957 gDvmJit.profileMode = kTraceProfilingContinuous; 958 } else if (strncmp(argv[i], "-Xjitdisableopt", 15) == 0) { 959 /* Disable selected optimizations */ 960 if (argv[i][15] == ':') { 961 sscanf(argv[i] + 16, "%x", &gDvmJit.disableOpt); 962 /* Disable all optimizations */ 963 } else { 964 gDvmJit.disableOpt = -1; 965 } 966 } else if (strncmp(argv[i], "-Xjitsuspendpoll", 16) == 0) { 967 gDvmJit.genSuspendPoll = true; 968#endif 969 970 } else if (strncmp(argv[i], "-Xstacktracefile:", 17) == 0) { 971 gDvm.stackTraceFile = strdup(argv[i]+17); 972 973 } else if (strcmp(argv[i], "-Xgenregmap") == 0) { 974 gDvm.generateRegisterMaps = true; 975 } else if (strcmp(argv[i], "-Xnogenregmap") == 0) { 976 gDvm.generateRegisterMaps = false; 977 978 } else if (strcmp(argv[i], "Xverifyopt:checkmon") == 0) { 979 gDvm.monitorVerification = true; 980 } else if (strcmp(argv[i], "Xverifyopt:nocheckmon") == 0) { 981 gDvm.monitorVerification = false; 982 983 } else if (strncmp(argv[i], "-Xgc:", 5) == 0) { 984 if (strcmp(argv[i] + 5, "precise") == 0) 985 gDvm.preciseGc = true; 986 else if (strcmp(argv[i] + 5, "noprecise") == 0) 987 gDvm.preciseGc = false; 988 else if (strcmp(argv[i] + 5, "preverify") == 0) 989 gDvm.preVerify = true; 990 else if (strcmp(argv[i] + 5, "nopreverify") == 0) 991 gDvm.preVerify = false; 992 else if (strcmp(argv[i] + 5, "postverify") == 0) 993 gDvm.postVerify = true; 994 else if (strcmp(argv[i] + 5, "nopostverify") == 0) 995 gDvm.postVerify = false; 996 else if (strcmp(argv[i] + 5, "concurrent") == 0) 997 gDvm.concurrentMarkSweep = true; 998 else if (strcmp(argv[i] + 5, "noconcurrent") == 0) 999 gDvm.concurrentMarkSweep = false; 1000 else if (strcmp(argv[i] + 5, "verifycardtable") == 0) 1001 gDvm.verifyCardTable = true; 1002 else if (strcmp(argv[i] + 5, "noverifycardtable") == 0) 1003 gDvm.verifyCardTable = false; 1004 else { 1005 dvmFprintf(stderr, "Bad value for -Xgc"); 1006 return -1; 1007 } 1008 LOGV("Precise GC configured %s", gDvm.preciseGc ? "ON" : "OFF"); 1009 1010 } else if (strcmp(argv[i], "-Xcheckdexsum") == 0) { 1011 gDvm.verifyDexChecksum = true; 1012 1013 } else if (strcmp(argv[i], "-Xprofile:threadcpuclock") == 0) { 1014 gDvm.profilerClockSource = kProfilerClockSourceThreadCpu; 1015 } else if (strcmp(argv[i], "-Xprofile:wallclock") == 0) { 1016 gDvm.profilerClockSource = kProfilerClockSourceWall; 1017 } else if (strcmp(argv[i], "-Xprofile:dualclock") == 0) { 1018 gDvm.profilerClockSource = kProfilerClockSourceDual; 1019 1020 } else { 1021 if (!ignoreUnrecognized) { 1022 dvmFprintf(stderr, "Unrecognized option '%s'\n", argv[i]); 1023 return -1; 1024 } 1025 } 1026 } 1027 1028 return 0; 1029} 1030 1031/* 1032 * Set defaults for fields altered or modified by arguments. 1033 * 1034 * Globals are initialized to 0 (a/k/a NULL or false). 1035 */ 1036static void setCommandLineDefaults() 1037{ 1038 const char* envStr = getenv("CLASSPATH"); 1039 if (envStr != NULL) { 1040 gDvm.classPathStr = strdup(envStr); 1041 } else { 1042 gDvm.classPathStr = strdup("."); 1043 } 1044 envStr = getenv("BOOTCLASSPATH"); 1045 if (envStr != NULL) { 1046 gDvm.bootClassPathStr = strdup(envStr); 1047 } else { 1048 gDvm.bootClassPathStr = strdup("."); 1049 } 1050 1051 gDvm.properties = new std::vector<std::string>(); 1052 1053 /* Defaults overridden by -Xms and -Xmx. 1054 * TODO: base these on a system or application-specific default 1055 */ 1056 gDvm.heapStartingSize = 2 * 1024 * 1024; // Spec says 16MB; too big for us. 1057 gDvm.heapMaximumSize = 16 * 1024 * 1024; // Spec says 75% physical mem 1058 gDvm.heapGrowthLimit = 0; // 0 means no growth limit 1059 gDvm.stackSize = kDefaultStackSize; 1060 1061 gDvm.concurrentMarkSweep = true; 1062 1063 /* gDvm.jdwpSuspend = true; */ 1064 1065 /* allowed unless zygote config doesn't allow it */ 1066 gDvm.jdwpAllowed = true; 1067 1068 /* default verification and optimization modes */ 1069 gDvm.classVerifyMode = VERIFY_MODE_ALL; 1070 gDvm.dexOptMode = OPTIMIZE_MODE_VERIFIED; 1071 gDvm.monitorVerification = false; 1072 gDvm.generateRegisterMaps = true; 1073 gDvm.registerMapMode = kRegisterMapModeTypePrecise; 1074 1075 /* 1076 * Default execution mode. 1077 * 1078 * This should probably interact with the mterp code somehow, e.g. if 1079 * we know we're using the "desktop" build we should probably be 1080 * using "portable" rather than "fast". 1081 */ 1082#if defined(WITH_JIT) 1083 gDvm.executionMode = kExecutionModeJit; 1084#else 1085 gDvm.executionMode = kExecutionModeInterpFast; 1086#endif 1087 1088 /* 1089 * SMP support is a compile-time define, but we may want to have 1090 * dexopt target a differently-configured device. 1091 */ 1092 gDvm.dexOptForSmp = (ANDROID_SMP != 0); 1093 1094 /* 1095 * Default profiler configuration. 1096 */ 1097 gDvm.profilerClockSource = kProfilerClockSourceThreadCpu; 1098} 1099 1100 1101/* 1102 * Handle a SIGBUS, which frequently occurs because somebody replaced an 1103 * optimized DEX file out from under us. 1104 */ 1105static void busCatcher(int signum, siginfo_t* info, void* context) 1106{ 1107 void* addr = info->si_addr; 1108 1109 LOGE("Caught a SIGBUS (%d), addr=%p", signum, addr); 1110 1111 /* 1112 * If we return at this point the SIGBUS just keeps happening, so we 1113 * remove the signal handler and allow it to kill us. TODO: restore 1114 * the original, which points to a debuggerd stub; if we don't then 1115 * debuggerd won't be notified. 1116 */ 1117 signal(SIGBUS, SIG_DFL); 1118} 1119 1120/* 1121 * Configure signals. We need to block SIGQUIT so that the signal only 1122 * reaches the dump-stack-trace thread. 1123 * 1124 * This can be disabled with the "-Xrs" flag. 1125 */ 1126static void blockSignals() 1127{ 1128 sigset_t mask; 1129 int cc; 1130 1131 sigemptyset(&mask); 1132 sigaddset(&mask, SIGQUIT); 1133 sigaddset(&mask, SIGUSR1); // used to initiate heap dump 1134#if defined(WITH_JIT) && defined(WITH_JIT_TUNING) 1135 sigaddset(&mask, SIGUSR2); // used to investigate JIT internals 1136#endif 1137 //sigaddset(&mask, SIGPIPE); 1138 cc = sigprocmask(SIG_BLOCK, &mask, NULL); 1139 assert(cc == 0); 1140 1141 if (false) { 1142 /* TODO: save the old sigaction in a global */ 1143 struct sigaction sa; 1144 memset(&sa, 0, sizeof(sa)); 1145 sa.sa_sigaction = busCatcher; 1146 sa.sa_flags = SA_SIGINFO; 1147 cc = sigaction(SIGBUS, &sa, NULL); 1148 assert(cc == 0); 1149 } 1150} 1151 1152class ScopedShutdown { 1153public: 1154 ScopedShutdown() : armed_(true) { 1155 } 1156 1157 ~ScopedShutdown() { 1158 if (armed_) { 1159 dvmShutdown(); 1160 } 1161 } 1162 1163 void disarm() { 1164 armed_ = false; 1165 } 1166 1167private: 1168 bool armed_; 1169}; 1170 1171/* 1172 * VM initialization. Pass in any options provided on the command line. 1173 * Do not pass in the class name or the options for the class. 1174 * 1175 * Returns 0 on success. 1176 */ 1177std::string dvmStartup(int argc, const char* const argv[], 1178 bool ignoreUnrecognized, JNIEnv* pEnv) 1179{ 1180 ScopedShutdown scopedShutdown; 1181 1182 assert(gDvm.initializing); 1183 1184 LOGV("VM init args (%d):", argc); 1185 for (int i = 0; i < argc; i++) { 1186 LOGV(" %d: '%s'", i, argv[i]); 1187 } 1188 setCommandLineDefaults(); 1189 1190 /* 1191 * Process the option flags (if any). 1192 */ 1193 int cc = processOptions(argc, argv, ignoreUnrecognized); 1194 if (cc != 0) { 1195 if (cc < 0) { 1196 dvmFprintf(stderr, "\n"); 1197 usage("dalvikvm"); 1198 } 1199 return "syntax error"; 1200 } 1201 1202#if WITH_EXTRA_GC_CHECKS > 1 1203 /* only "portable" interp has the extra goodies */ 1204 if (gDvm.executionMode != kExecutionModeInterpPortable) { 1205 LOGI("Switching to 'portable' interpreter for GC checks"); 1206 gDvm.executionMode = kExecutionModeInterpPortable; 1207 } 1208#endif 1209 1210 /* Configure group scheduling capabilities */ 1211 if (!access("/dev/cpuctl/tasks", F_OK)) { 1212 LOGV("Using kernel group scheduling"); 1213 gDvm.kernelGroupScheduling = 1; 1214 } else { 1215 LOGV("Using kernel scheduler policies"); 1216 } 1217 1218 /* configure signal handling */ 1219 if (!gDvm.reduceSignals) 1220 blockSignals(); 1221 1222 /* verify system page size */ 1223 if (sysconf(_SC_PAGESIZE) != SYSTEM_PAGE_SIZE) { 1224 return StringPrintf("expected page size %d, got %d", 1225 SYSTEM_PAGE_SIZE, (int) sysconf(_SC_PAGESIZE)); 1226 } 1227 1228 /* mterp setup */ 1229 LOGV("Using executionMode %d", gDvm.executionMode); 1230 dvmCheckAsmConstants(); 1231 1232 /* 1233 * Initialize components. 1234 */ 1235 if (!dvmAllocTrackerStartup()) { 1236 return "dvmAllocTrackerStartup failed"; 1237 } 1238 if (!dvmGcStartup()) { 1239 return "dvmGcStartup failed"; 1240 } 1241 if (!dvmThreadStartup()) { 1242 return "dvmThreadStartup failed"; 1243 } 1244 if (!dvmInlineNativeStartup()) { 1245 return "dvmInlineNativeStartup"; 1246 } 1247 if (!dvmRegisterMapStartup()) { 1248 return "dvmRegisterMapStartup failed"; 1249 } 1250 if (!dvmInstanceofStartup()) { 1251 return "dvmInstanceofStartup failed"; 1252 } 1253 if (!dvmClassStartup()) { 1254 return "dvmClassStartup failed"; 1255 } 1256 1257 /* 1258 * At this point, the system is guaranteed to be sufficiently 1259 * initialized that we can look up classes and class members. This 1260 * call populates the gDvm instance with all the class and member 1261 * references that the VM wants to use directly. 1262 */ 1263 if (!dvmFindRequiredClassesAndMembers()) { 1264 return "dvmFindRequiredClassesAndMembers failed"; 1265 } 1266 1267 if (!dvmStringInternStartup()) { 1268 return "dvmStringInternStartup failed"; 1269 } 1270 if (!dvmNativeStartup()) { 1271 return "dvmNativeStartup failed"; 1272 } 1273 if (!dvmInternalNativeStartup()) { 1274 return "dvmInternalNativeStartup failed"; 1275 } 1276 if (!dvmJniStartup()) { 1277 return "dvmJniStartup failed"; 1278 } 1279 if (!dvmProfilingStartup()) { 1280 return "dvmProfilingStartup failed"; 1281 } 1282 1283 /* 1284 * Create a table of methods for which we will substitute an "inline" 1285 * version for performance. 1286 */ 1287 if (!dvmCreateInlineSubsTable()) { 1288 return "dvmCreateInlineSubsTable failed"; 1289 } 1290 1291 /* 1292 * Miscellaneous class library validation. 1293 */ 1294 if (!dvmValidateBoxClasses()) { 1295 return "dvmValidateBoxClasses failed"; 1296 } 1297 1298 /* 1299 * Do the last bits of Thread struct initialization we need to allow 1300 * JNI calls to work. 1301 */ 1302 if (!dvmPrepMainForJni(pEnv)) { 1303 return "dvmPrepMainForJni failed"; 1304 } 1305 1306 /* 1307 * Explicitly initialize java.lang.Class. This doesn't happen 1308 * automatically because it's allocated specially (it's an instance 1309 * of itself). Must happen before registration of system natives, 1310 * which make some calls that throw assertions if the classes they 1311 * operate on aren't initialized. 1312 */ 1313 if (!dvmInitClass(gDvm.classJavaLangClass)) { 1314 return "couldn't initialized java.lang.Class"; 1315 } 1316 1317 /* 1318 * Register the system native methods, which are registered through JNI. 1319 */ 1320 if (!registerSystemNatives(pEnv)) { 1321 return "couldn't register system natives"; 1322 } 1323 1324 /* 1325 * Do some "late" initialization for the memory allocator. This may 1326 * allocate storage and initialize classes. 1327 */ 1328 if (!dvmCreateStockExceptions()) { 1329 return "dvmCreateStockExceptions failed"; 1330 } 1331 1332 /* 1333 * At this point, the VM is in a pretty good state. Finish prep on 1334 * the main thread (specifically, create a java.lang.Thread object to go 1335 * along with our Thread struct). Note we will probably be executing 1336 * some interpreted class initializer code in here. 1337 */ 1338 if (!dvmPrepMainThread()) { 1339 return "dvmPrepMainThread failed"; 1340 } 1341 1342 /* 1343 * Make sure we haven't accumulated any tracked references. The main 1344 * thread should be starting with a clean slate. 1345 */ 1346 if (dvmReferenceTableEntries(&dvmThreadSelf()->internalLocalRefTable) != 0) 1347 { 1348 LOGW("Warning: tracked references remain post-initialization"); 1349 dvmDumpReferenceTable(&dvmThreadSelf()->internalLocalRefTable, "MAIN"); 1350 } 1351 1352 /* general debugging setup */ 1353 if (!dvmDebuggerStartup()) { 1354 return "dvmDebuggerStartup failed"; 1355 } 1356 1357 if (!dvmGcStartupClasses()) { 1358 return "dvmGcStartupClasses failed"; 1359 } 1360 1361 /* 1362 * Init for either zygote mode or non-zygote mode. The key difference 1363 * is that we don't start any additional threads in Zygote mode. 1364 */ 1365 if (gDvm.zygote) { 1366 if (!initZygote()) { 1367 return "initZygote failed"; 1368 } 1369 } else { 1370 if (!dvmInitAfterZygote()) { 1371 return "dvmInitAfterZygote failed"; 1372 } 1373 } 1374 1375 1376#ifndef NDEBUG 1377 if (!dvmTestHash()) 1378 LOGE("dvmTestHash FAILED"); 1379 if (false /*noisy!*/ && !dvmTestIndirectRefTable()) 1380 LOGE("dvmTestIndirectRefTable FAILED"); 1381#endif 1382 1383 if (dvmCheckException(dvmThreadSelf())) { 1384 dvmLogExceptionStackTrace(); 1385 return "Exception pending at end of VM initialization"; 1386 } 1387 1388 scopedShutdown.disarm(); 1389 return ""; 1390} 1391 1392/* 1393 * Register java.* natives from our class libraries. We need to do 1394 * this after we're ready for JNI registration calls, but before we 1395 * do any class initialization. 1396 * 1397 * If we get this wrong, we will blow up in the ThreadGroup class init if 1398 * interpreted code makes any reference to System. It will likely do this 1399 * since it wants to do some java.io.File setup (e.g. for static in/out/err). 1400 * 1401 * We need to have gDvm.initializing raised here so that JNI FindClass 1402 * won't try to use the system/application class loader. 1403 */ 1404static bool registerSystemNatives(JNIEnv* pEnv) 1405{ 1406 Thread* self; 1407 1408 /* main thread is always first in list */ 1409 self = gDvm.threadList; 1410 1411 /* must set this before allowing JNI-based method registration */ 1412 self->status = THREAD_NATIVE; 1413 1414 if (jniRegisterSystemMethods(pEnv) < 0) { 1415 LOGE("jniRegisterSystemMethods failed"); 1416 return false; 1417 } 1418 1419 /* back to run mode */ 1420 self->status = THREAD_RUNNING; 1421 1422 return true; 1423} 1424 1425 1426/* 1427 * Do zygote-mode-only initialization. 1428 */ 1429static bool initZygote() 1430{ 1431 /* zygote goes into its own process group */ 1432 setpgid(0,0); 1433 1434 return true; 1435} 1436 1437/* 1438 * Do non-zygote-mode initialization. This is done during VM init for 1439 * standard startup, or after a "zygote fork" when creating a new process. 1440 */ 1441bool dvmInitAfterZygote() 1442{ 1443 u8 startHeap, startQuit, startJdwp; 1444 u8 endHeap, endQuit, endJdwp; 1445 1446 startHeap = dvmGetRelativeTimeUsec(); 1447 1448 /* 1449 * Post-zygote heap initialization, including starting 1450 * the HeapWorker thread. 1451 */ 1452 if (!dvmGcStartupAfterZygote()) 1453 return false; 1454 1455 endHeap = dvmGetRelativeTimeUsec(); 1456 startQuit = dvmGetRelativeTimeUsec(); 1457 1458 /* start signal catcher thread that dumps stacks on SIGQUIT */ 1459 if (!gDvm.reduceSignals && !gDvm.noQuitHandler) { 1460 if (!dvmSignalCatcherStartup()) 1461 return false; 1462 } 1463 1464 /* start stdout/stderr copier, if requested */ 1465 if (gDvm.logStdio) { 1466 if (!dvmStdioConverterStartup()) 1467 return false; 1468 } 1469 1470 endQuit = dvmGetRelativeTimeUsec(); 1471 startJdwp = dvmGetRelativeTimeUsec(); 1472 1473 /* 1474 * Start JDWP thread. If the command-line debugger flags specified 1475 * "suspend=y", this will pause the VM. We probably want this to 1476 * come last. 1477 */ 1478 if (!initJdwp()) { 1479 LOGD("JDWP init failed; continuing anyway"); 1480 } 1481 1482 endJdwp = dvmGetRelativeTimeUsec(); 1483 1484 LOGV("thread-start heap=%d quit=%d jdwp=%d total=%d usec", 1485 (int)(endHeap-startHeap), (int)(endQuit-startQuit), 1486 (int)(endJdwp-startJdwp), (int)(endJdwp-startHeap)); 1487 1488#ifdef WITH_JIT 1489 if (gDvm.executionMode == kExecutionModeJit) { 1490 if (!dvmCompilerStartup()) 1491 return false; 1492 } 1493#endif 1494 1495 return true; 1496} 1497 1498/* 1499 * Prepare for a connection to a JDWP-compliant debugger. 1500 * 1501 * Note this needs to happen fairly late in the startup process, because 1502 * we need to have all of the java.* native methods registered (which in 1503 * turn requires JNI to be fully prepped). 1504 * 1505 * There are several ways to initialize: 1506 * server=n 1507 * We immediately try to connect to host:port. Bail on failure. On 1508 * success, send VM_START (suspending the VM if "suspend=y"). 1509 * server=y suspend=n 1510 * Passively listen for a debugger to connect. Return immediately. 1511 * server=y suspend=y 1512 * Wait until debugger connects. Send VM_START ASAP, suspending the 1513 * VM after the message is sent. 1514 * 1515 * This gets more complicated with a nonzero value for "timeout". 1516 */ 1517static bool initJdwp() 1518{ 1519 assert(!gDvm.zygote); 1520 1521 /* 1522 * Init JDWP if the debugger is enabled. This may connect out to a 1523 * debugger, passively listen for a debugger, or block waiting for a 1524 * debugger. 1525 */ 1526 if (gDvm.jdwpAllowed && gDvm.jdwpConfigured) { 1527 JdwpStartupParams params; 1528 1529 if (gDvm.jdwpHost != NULL) { 1530 if (strlen(gDvm.jdwpHost) >= sizeof(params.host)-1) { 1531 LOGE("ERROR: hostname too long: '%s'", gDvm.jdwpHost); 1532 return false; 1533 } 1534 strcpy(params.host, gDvm.jdwpHost); 1535 } else { 1536 params.host[0] = '\0'; 1537 } 1538 params.transport = gDvm.jdwpTransport; 1539 params.server = gDvm.jdwpServer; 1540 params.suspend = gDvm.jdwpSuspend; 1541 params.port = gDvm.jdwpPort; 1542 1543 gDvm.jdwpState = dvmJdwpStartup(¶ms); 1544 if (gDvm.jdwpState == NULL) { 1545 LOGW("WARNING: debugger thread failed to initialize"); 1546 /* TODO: ignore? fail? need to mimic "expected" behavior */ 1547 } 1548 } 1549 1550 /* 1551 * If a debugger has already attached, send the "welcome" message. This 1552 * may cause us to suspend all threads. 1553 */ 1554 if (dvmJdwpIsActive(gDvm.jdwpState)) { 1555 //dvmChangeStatus(NULL, THREAD_RUNNING); 1556 if (!dvmJdwpPostVMStart(gDvm.jdwpState, gDvm.jdwpSuspend)) { 1557 LOGW("WARNING: failed to post 'start' message to debugger"); 1558 /* keep going */ 1559 } 1560 //dvmChangeStatus(NULL, THREAD_NATIVE); 1561 } 1562 1563 return true; 1564} 1565 1566/* 1567 * An alternative to JNI_CreateJavaVM/dvmStartup that does the first bit 1568 * of initialization and then returns with "initializing" still set. (Used 1569 * by DexOpt command-line utility.) 1570 * 1571 * Attempting to use JNI or internal natives will fail. It's best 1572 * if no bytecode gets executed, which means no <clinit>, which means 1573 * no exception-throwing. (In practice we need to initialize Class and 1574 * Object, and probably some exception classes.) 1575 * 1576 * Returns 0 on success. 1577 */ 1578int dvmPrepForDexOpt(const char* bootClassPath, DexOptimizerMode dexOptMode, 1579 DexClassVerifyMode verifyMode, int dexoptFlags) 1580{ 1581 gDvm.initializing = true; 1582 gDvm.optimizing = true; 1583 1584 /* configure signal handling */ 1585 blockSignals(); 1586 1587 /* set some defaults */ 1588 setCommandLineDefaults(); 1589 free(gDvm.bootClassPathStr); 1590 gDvm.bootClassPathStr = strdup(bootClassPath); 1591 1592 /* set opt/verify modes */ 1593 gDvm.dexOptMode = dexOptMode; 1594 gDvm.classVerifyMode = verifyMode; 1595 gDvm.generateRegisterMaps = (dexoptFlags & DEXOPT_GEN_REGISTER_MAPS) != 0; 1596 if (dexoptFlags & DEXOPT_SMP) { 1597 assert((dexoptFlags & DEXOPT_UNIPROCESSOR) == 0); 1598 gDvm.dexOptForSmp = true; 1599 } else if (dexoptFlags & DEXOPT_UNIPROCESSOR) { 1600 gDvm.dexOptForSmp = false; 1601 } else { 1602 gDvm.dexOptForSmp = (ANDROID_SMP != 0); 1603 } 1604 1605 /* 1606 * Initialize the heap, some basic thread control mutexes, and 1607 * get the bootclasspath prepped. 1608 * 1609 * We can't load any classes yet because we may not yet have a source 1610 * for things like java.lang.Object and java.lang.Class. 1611 */ 1612 if (!dvmGcStartup()) 1613 goto fail; 1614 if (!dvmThreadStartup()) 1615 goto fail; 1616 if (!dvmInlineNativeStartup()) 1617 goto fail; 1618 if (!dvmRegisterMapStartup()) 1619 goto fail; 1620 if (!dvmInstanceofStartup()) 1621 goto fail; 1622 if (!dvmClassStartup()) 1623 goto fail; 1624 1625 /* 1626 * We leave gDvm.initializing set to "true" so that, if we're not 1627 * able to process the "core" classes, we don't go into a death-spin 1628 * trying to throw a "class not found" exception. 1629 */ 1630 1631 return 0; 1632 1633fail: 1634 dvmShutdown(); 1635 return 1; 1636} 1637 1638 1639/* 1640 * All threads have stopped. Finish the shutdown procedure. 1641 * 1642 * We can also be called if startup fails partway through, so be prepared 1643 * to deal with partially initialized data. 1644 * 1645 * Free any storage allocated in gGlobals. 1646 * 1647 * We can't dlclose() shared libs we've loaded, because it's possible a 1648 * thread not associated with the VM is running code in one. 1649 * 1650 * This is called from the JNI DestroyJavaVM function, which can be 1651 * called from any thread. (In practice, this will usually run in the 1652 * same thread that started the VM, a/k/a the main thread, but we don't 1653 * want to assume that.) 1654 */ 1655void dvmShutdown() 1656{ 1657 LOGV("VM shutting down"); 1658 1659 if (CALC_CACHE_STATS) 1660 dvmDumpAtomicCacheStats(gDvm.instanceofCache); 1661 1662 /* 1663 * Stop our internal threads. 1664 */ 1665 dvmGcThreadShutdown(); 1666 1667 if (gDvm.jdwpState != NULL) 1668 dvmJdwpShutdown(gDvm.jdwpState); 1669 free(gDvm.jdwpHost); 1670 gDvm.jdwpHost = NULL; 1671 free(gDvm.jniTrace); 1672 gDvm.jniTrace = NULL; 1673 free(gDvm.stackTraceFile); 1674 gDvm.stackTraceFile = NULL; 1675 1676 /* tell signal catcher to shut down if it was started */ 1677 dvmSignalCatcherShutdown(); 1678 1679 /* shut down stdout/stderr conversion */ 1680 dvmStdioConverterShutdown(); 1681 1682#ifdef WITH_JIT 1683 if (gDvm.executionMode == kExecutionModeJit) { 1684 /* shut down the compiler thread */ 1685 dvmCompilerShutdown(); 1686 } 1687#endif 1688 1689 /* 1690 * Kill any daemon threads that still exist. Actively-running threads 1691 * are likely to crash the process if they continue to execute while 1692 * the VM shuts down. 1693 */ 1694 dvmSlayDaemons(); 1695 1696 if (gDvm.verboseShutdown) 1697 LOGD("VM cleaning up"); 1698 1699 dvmDebuggerShutdown(); 1700 dvmProfilingShutdown(); 1701 dvmJniShutdown(); 1702 dvmStringInternShutdown(); 1703 dvmThreadShutdown(); 1704 dvmClassShutdown(); 1705 dvmRegisterMapShutdown(); 1706 dvmInstanceofShutdown(); 1707 dvmInlineNativeShutdown(); 1708 dvmGcShutdown(); 1709 dvmAllocTrackerShutdown(); 1710 1711 /* these must happen AFTER dvmClassShutdown has walked through class data */ 1712 dvmNativeShutdown(); 1713 dvmInternalNativeShutdown(); 1714 1715 dvmFreeInlineSubsTable(); 1716 1717 free(gDvm.bootClassPathStr); 1718 free(gDvm.classPathStr); 1719 delete gDvm.properties; 1720 1721 freeAssertionCtrl(); 1722 1723 /* 1724 * We want valgrind to report anything we forget to free as "definitely 1725 * lost". If there's a pointer in the global chunk, it would be reported 1726 * as "still reachable". Erasing the memory fixes this. 1727 * 1728 * This must be erased to zero if we want to restart the VM within this 1729 * process. 1730 */ 1731 memset(&gDvm, 0xcd, sizeof(gDvm)); 1732} 1733 1734 1735/* 1736 * fprintf() wrapper that calls through the JNI-specified vfprintf hook if 1737 * one was specified. 1738 */ 1739int dvmFprintf(FILE* fp, const char* format, ...) 1740{ 1741 va_list args; 1742 int result; 1743 1744 va_start(args, format); 1745 if (gDvm.vfprintfHook != NULL) 1746 result = (*gDvm.vfprintfHook)(fp, format, args); 1747 else 1748 result = vfprintf(fp, format, args); 1749 va_end(args); 1750 1751 return result; 1752} 1753 1754#ifdef __GLIBC__ 1755#include <execinfo.h> 1756/* 1757 * glibc-only stack dump function. Requires link with "--export-dynamic". 1758 * 1759 * TODO: move this into libs/cutils and make it work for all platforms. 1760 */ 1761void dvmPrintNativeBackTrace() 1762{ 1763 size_t MAX_STACK_FRAMES = 64; 1764 void* stackFrames[MAX_STACK_FRAMES]; 1765 size_t frameCount = backtrace(stackFrames, MAX_STACK_FRAMES); 1766 1767 /* 1768 * TODO: in practice, we may find that we should use backtrace_symbols_fd 1769 * to avoid allocation, rather than use our own custom formatting. 1770 */ 1771 char** strings = backtrace_symbols(stackFrames, frameCount); 1772 if (strings == NULL) { 1773 LOGE("backtrace_symbols failed: %s", strerror(errno)); 1774 return; 1775 } 1776 1777 size_t i; 1778 for (i = 0; i < frameCount; ++i) { 1779 LOGW("#%-2d %s", i, strings[i]); 1780 } 1781 free(strings); 1782} 1783#else 1784void dvmPrintNativeBackTrace() { 1785 /* Hopefully, you're on an Android device and debuggerd will do this. */ 1786} 1787#endif 1788 1789/* 1790 * Abort the VM. We get here on fatal errors. Try very hard not to use 1791 * this; whenever possible, return an error to somebody responsible. 1792 */ 1793void dvmAbort() 1794{ 1795 LOGE("VM aborting"); 1796 1797 fflush(NULL); // flush all open file buffers 1798 1799 /* JNI-supplied abort hook gets right of first refusal */ 1800 if (gDvm.abortHook != NULL) 1801 (*gDvm.abortHook)(); 1802 1803 /* 1804 * On the device, debuggerd will give us a stack trace. 1805 * On the host, we have to help ourselves. 1806 */ 1807 dvmPrintNativeBackTrace(); 1808 1809 /* 1810 * If we call abort(), all threads in the process receives a SIBABRT. 1811 * debuggerd dumps the stack trace of the main thread, whether or not 1812 * that was the thread that failed. 1813 * 1814 * By stuffing a value into a bogus address, we cause a segmentation 1815 * fault in the current thread, and get a useful log from debuggerd. 1816 * We can also trivially tell the difference between a VM crash and 1817 * a deliberate abort by looking at the fault address. 1818 */ 1819 *((char*)0xdeadd00d) = 38; 1820 abort(); 1821 1822 /* notreached */ 1823} 1824