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 #ifdef HAVE_ANDROID_OS
32 #include <sys/prctl.h>
33 #endif
34
35 #include "Dalvik.h"
36 #include "test/Test.h"
37 #include "mterp/Mterp.h"
38 #include "Hash.h"
39
40 #if defined(WITH_JIT)
41 #include "compiler/codegen/Optimizer.h"
42 #endif
43
44 #define kMinHeapStartSize (1*1024*1024)
45 #define kMinHeapSize (2*1024*1024)
46 #define kMaxHeapSize (1*1024*1024*1024)
47
48 /*
49 * Register VM-agnostic native methods for system classes.
50 */
51 extern int jniRegisterSystemMethods(JNIEnv* env);
52
53 /* fwd */
54 static bool registerSystemNatives(JNIEnv* pEnv);
55 static bool initJdwp();
56 static bool initZygote();
57
58
59 /* global state */
60 struct DvmGlobals gDvm;
61 struct DvmJniGlobals gDvmJni;
62
63 /* JIT-specific global state */
64 #if defined(WITH_JIT)
65 struct DvmJitGlobals gDvmJit;
66
67 #if defined(WITH_JIT_TUNING)
68 /*
69 * Track the number of hits in the inline cache for predicted chaining.
70 * Use an ugly global variable here since it is accessed in assembly code.
71 */
72 int gDvmICHitCount;
73 #endif
74
75 #endif
76
77 /*
78 * Show usage.
79 *
80 * We follow the tradition of unhyphenated compound words.
81 */
usage(const char * progName)82 static void usage(const char* progName)
83 {
84 dvmFprintf(stderr, "%s: [options] class [argument ...]\n", progName);
85 dvmFprintf(stderr, "%s: [options] -jar file.jar [argument ...]\n",progName);
86 dvmFprintf(stderr, "\n");
87 dvmFprintf(stderr, "The following standard options are recognized:\n");
88 dvmFprintf(stderr, " -classpath classpath\n");
89 dvmFprintf(stderr, " -Dproperty=value\n");
90 dvmFprintf(stderr, " -verbose:tag ('gc', 'jni', or 'class')\n");
91 dvmFprintf(stderr, " -ea[:<package name>... |:<class name>]\n");
92 dvmFprintf(stderr, " -da[:<package name>... |:<class name>]\n");
93 dvmFprintf(stderr, " (-enableassertions, -disableassertions)\n");
94 dvmFprintf(stderr, " -esa\n");
95 dvmFprintf(stderr, " -dsa\n");
96 dvmFprintf(stderr,
97 " (-enablesystemassertions, -disablesystemassertions)\n");
98 dvmFprintf(stderr, " -showversion\n");
99 dvmFprintf(stderr, " -help\n");
100 dvmFprintf(stderr, "\n");
101 dvmFprintf(stderr, "The following extended options are recognized:\n");
102 dvmFprintf(stderr, " -Xrunjdwp:<options>\n");
103 dvmFprintf(stderr, " -Xbootclasspath:bootclasspath\n");
104 dvmFprintf(stderr, " -Xcheck:tag (e.g. 'jni')\n");
105 dvmFprintf(stderr, " -XmsN (min heap, must be multiple of 1K, >= 1MB)\n");
106 dvmFprintf(stderr, " -XmxN (max heap, must be multiple of 1K, >= 2MB)\n");
107 dvmFprintf(stderr, " -XssN (stack size, >= %dKB, <= %dKB)\n",
108 kMinStackSize / 1024, kMaxStackSize / 1024);
109 dvmFprintf(stderr, " -Xverify:{none,remote,all}\n");
110 dvmFprintf(stderr, " -Xrs\n");
111 #if defined(WITH_JIT)
112 dvmFprintf(stderr,
113 " -Xint (extended to accept ':portable', ':fast' and ':jit')\n");
114 #else
115 dvmFprintf(stderr,
116 " -Xint (extended to accept ':portable' and ':fast')\n");
117 #endif
118 dvmFprintf(stderr, "\n");
119 dvmFprintf(stderr, "These are unique to Dalvik:\n");
120 dvmFprintf(stderr, " -Xzygote\n");
121 dvmFprintf(stderr, " -Xdexopt:{none,verified,all,full}\n");
122 dvmFprintf(stderr, " -Xnoquithandler\n");
123 dvmFprintf(stderr,
124 " -Xjnigreflimit:N (must be multiple of 100, >= 200)\n");
125 dvmFprintf(stderr, " -Xjniopts:{warnonly,forcecopy}\n");
126 dvmFprintf(stderr, " -Xjnitrace:substring (eg NativeClass or nativeMethod)\n");
127 dvmFprintf(stderr, " -Xstacktracefile:<filename>\n");
128 dvmFprintf(stderr, " -Xgc:[no]precise\n");
129 dvmFprintf(stderr, " -Xgc:[no]preverify\n");
130 dvmFprintf(stderr, " -Xgc:[no]postverify\n");
131 dvmFprintf(stderr, " -Xgc:[no]concurrent\n");
132 dvmFprintf(stderr, " -Xgc:[no]verifycardtable\n");
133 dvmFprintf(stderr, " -XX:+DisableExplicitGC\n");
134 dvmFprintf(stderr, " -X[no]genregmap\n");
135 dvmFprintf(stderr, " -Xverifyopt:[no]checkmon\n");
136 dvmFprintf(stderr, " -Xcheckdexsum\n");
137 #if defined(WITH_JIT)
138 dvmFprintf(stderr, " -Xincludeselectedop\n");
139 dvmFprintf(stderr, " -Xjitop:hexopvalue[-endvalue]"
140 "[,hexopvalue[-endvalue]]*\n");
141 dvmFprintf(stderr, " -Xincludeselectedmethod\n");
142 dvmFprintf(stderr, " -Xjitthreshold:decimalvalue\n");
143 dvmFprintf(stderr, " -Xjitblocking\n");
144 dvmFprintf(stderr, " -Xjitmethod:signature[,signature]* "
145 "(eg Ljava/lang/String\\;replace)\n");
146 dvmFprintf(stderr, " -Xjitclass:classname[,classname]*\n");
147 dvmFprintf(stderr, " -Xjitoffset:offset[,offset]\n");
148 dvmFprintf(stderr, " -Xjitconfig:filename\n");
149 dvmFprintf(stderr, " -Xjitcheckcg\n");
150 dvmFprintf(stderr, " -Xjitverbose\n");
151 dvmFprintf(stderr, " -Xjitprofile\n");
152 dvmFprintf(stderr, " -Xjitdisableopt\n");
153 dvmFprintf(stderr, " -Xjitsuspendpoll\n");
154 #endif
155 dvmFprintf(stderr, "\n");
156 dvmFprintf(stderr, "Configured with:"
157 " debugger"
158 " profiler"
159 " hprof"
160 #ifdef WITH_TRACKREF_CHECKS
161 " trackref_checks"
162 #endif
163 #ifdef WITH_INSTR_CHECKS
164 " instr_checks"
165 #endif
166 #ifdef WITH_EXTRA_OBJECT_VALIDATION
167 " extra_object_validation"
168 #endif
169 #ifdef WITH_EXTRA_GC_CHECKS
170 " extra_gc_checks"
171 #endif
172 #if !defined(NDEBUG) && defined(WITH_DALVIK_ASSERT)
173 " dalvik_assert"
174 #endif
175 #ifdef WITH_JNI_STACK_CHECK
176 " jni_stack_check"
177 #endif
178 #ifdef EASY_GDB
179 " easy_gdb"
180 #endif
181 #ifdef CHECK_MUTEX
182 " check_mutex"
183 #endif
184 #if defined(WITH_JIT)
185 " jit(" ARCH_VARIANT ")"
186 #endif
187 #if defined(WITH_SELF_VERIFICATION)
188 " self_verification"
189 #endif
190 #if ANDROID_SMP != 0
191 " smp"
192 #endif
193 );
194 #ifdef DVM_SHOW_EXCEPTION
195 dvmFprintf(stderr, " show_exception=%d", DVM_SHOW_EXCEPTION);
196 #endif
197 dvmFprintf(stderr, "\n\n");
198 }
199
200 /*
201 * Show helpful information on JDWP options.
202 */
showJdwpHelp()203 static void showJdwpHelp()
204 {
205 dvmFprintf(stderr,
206 "Example: -Xrunjdwp:transport=dt_socket,address=8000,server=y\n");
207 dvmFprintf(stderr,
208 "Example: -Xrunjdwp:transport=dt_socket,address=localhost:6500,server=n\n");
209 }
210
211 /*
212 * Show version and copyright info.
213 */
showVersion()214 static void showVersion()
215 {
216 dvmFprintf(stdout, "DalvikVM version %d.%d.%d\n",
217 DALVIK_MAJOR_VERSION, DALVIK_MINOR_VERSION, DALVIK_BUG_VERSION);
218 dvmFprintf(stdout,
219 "Copyright (C) 2007 The Android Open Source Project\n\n"
220 "This software is built from source code licensed under the "
221 "Apache License,\n"
222 "Version 2.0 (the \"License\"). You may obtain a copy of the "
223 "License at\n\n"
224 " http://www.apache.org/licenses/LICENSE-2.0\n\n"
225 "See the associated NOTICE file for this software for further "
226 "details.\n");
227 }
228
229 /*
230 * Parse a string of the form /[0-9]+[kKmMgG]?/, which is used to specify
231 * memory sizes. [kK] indicates kilobytes, [mM] megabytes, and
232 * [gG] gigabytes.
233 *
234 * "s" should point just past the "-Xm?" part of the string.
235 * "min" specifies the lowest acceptable value described by "s".
236 * "div" specifies a divisor, e.g. 1024 if the value must be a multiple
237 * of 1024.
238 *
239 * The spec says the -Xmx and -Xms options must be multiples of 1024. It
240 * doesn't say anything about -Xss.
241 *
242 * Returns 0 (a useless size) if "s" is malformed or specifies a low or
243 * non-evenly-divisible value.
244 */
parseMemOption(const char * s,size_t div)245 static size_t parseMemOption(const char* s, size_t div)
246 {
247 /* strtoul accepts a leading [+-], which we don't want,
248 * so make sure our string starts with a decimal digit.
249 */
250 if (isdigit(*s)) {
251 const char* s2;
252 size_t val;
253
254 val = strtoul(s, (char* *)&s2, 10);
255 if (s2 != s) {
256 /* s2 should be pointing just after the number.
257 * If this is the end of the string, the user
258 * has specified a number of bytes. Otherwise,
259 * there should be exactly one more character
260 * that specifies a multiplier.
261 */
262 if (*s2 != '\0') {
263 char c;
264
265 /* The remainder of the string is either a single multiplier
266 * character, or nothing to indicate that the value is in
267 * bytes.
268 */
269 c = *s2++;
270 if (*s2 == '\0') {
271 size_t mul;
272
273 if (c == '\0') {
274 mul = 1;
275 } else if (c == 'k' || c == 'K') {
276 mul = 1024;
277 } else if (c == 'm' || c == 'M') {
278 mul = 1024 * 1024;
279 } else if (c == 'g' || c == 'G') {
280 mul = 1024 * 1024 * 1024;
281 } else {
282 /* Unknown multiplier character.
283 */
284 return 0;
285 }
286
287 if (val <= SIZE_MAX / mul) {
288 val *= mul;
289 } else {
290 /* Clamp to a multiple of 1024.
291 */
292 val = SIZE_MAX & ~(1024-1);
293 }
294 } else {
295 /* There's more than one character after the
296 * numeric part.
297 */
298 return 0;
299 }
300 }
301
302 /* The man page says that a -Xm value must be
303 * a multiple of 1024.
304 */
305 if (val % div == 0) {
306 return val;
307 }
308 }
309 }
310
311 return 0;
312 }
313
314 /*
315 * Handle one of the JDWP name/value pairs.
316 *
317 * JDWP options are:
318 * help: if specified, show help message and bail
319 * transport: may be dt_socket or dt_shmem
320 * address: for dt_socket, "host:port", or just "port" when listening
321 * server: if "y", wait for debugger to attach; if "n", attach to debugger
322 * timeout: how long to wait for debugger to connect / listen
323 *
324 * Useful with server=n (these aren't supported yet):
325 * onthrow=<exception-name>: connect to debugger when exception thrown
326 * onuncaught=y|n: connect to debugger when uncaught exception thrown
327 * launch=<command-line>: launch the debugger itself
328 *
329 * The "transport" option is required, as is "address" if server=n.
330 */
handleJdwpOption(const char * name,const char * value)331 static bool handleJdwpOption(const char* name, const char* value)
332 {
333 if (strcmp(name, "transport") == 0) {
334 if (strcmp(value, "dt_socket") == 0) {
335 gDvm.jdwpTransport = kJdwpTransportSocket;
336 } else if (strcmp(value, "dt_android_adb") == 0) {
337 gDvm.jdwpTransport = kJdwpTransportAndroidAdb;
338 } else {
339 ALOGE("JDWP transport '%s' not supported", value);
340 return false;
341 }
342 } else if (strcmp(name, "server") == 0) {
343 if (*value == 'n')
344 gDvm.jdwpServer = false;
345 else if (*value == 'y')
346 gDvm.jdwpServer = true;
347 else {
348 ALOGE("JDWP option 'server' must be 'y' or 'n'");
349 return false;
350 }
351 } else if (strcmp(name, "suspend") == 0) {
352 if (*value == 'n')
353 gDvm.jdwpSuspend = false;
354 else if (*value == 'y')
355 gDvm.jdwpSuspend = true;
356 else {
357 ALOGE("JDWP option 'suspend' must be 'y' or 'n'");
358 return false;
359 }
360 } else if (strcmp(name, "address") == 0) {
361 /* this is either <port> or <host>:<port> */
362 const char* colon = strchr(value, ':');
363 char* end;
364 long port;
365
366 if (colon != NULL) {
367 free(gDvm.jdwpHost);
368 gDvm.jdwpHost = (char*) malloc(colon - value +1);
369 strncpy(gDvm.jdwpHost, value, colon - value +1);
370 gDvm.jdwpHost[colon-value] = '\0';
371 value = colon + 1;
372 }
373 if (*value == '\0') {
374 ALOGE("JDWP address missing port");
375 return false;
376 }
377 port = strtol(value, &end, 10);
378 if (*end != '\0') {
379 ALOGE("JDWP address has junk in port field '%s'", value);
380 return false;
381 }
382 gDvm.jdwpPort = port;
383 } else if (strcmp(name, "launch") == 0 ||
384 strcmp(name, "onthrow") == 0 ||
385 strcmp(name, "oncaught") == 0 ||
386 strcmp(name, "timeout") == 0)
387 {
388 /* valid but unsupported */
389 ALOGI("Ignoring JDWP option '%s'='%s'", name, value);
390 } else {
391 ALOGI("Ignoring unrecognized JDWP option '%s'='%s'", name, value);
392 }
393
394 return true;
395 }
396
397 /*
398 * Parse the latter half of a -Xrunjdwp/-agentlib:jdwp= string, e.g.:
399 * "transport=dt_socket,address=8000,server=y,suspend=n"
400 */
parseJdwpOptions(const char * str)401 static bool parseJdwpOptions(const char* str)
402 {
403 char* mangle = strdup(str);
404 char* name = mangle;
405 bool result = false;
406
407 /*
408 * Process all of the name=value pairs.
409 */
410 while (true) {
411 char* value;
412 char* comma;
413
414 value = strchr(name, '=');
415 if (value == NULL) {
416 ALOGE("JDWP opts: garbage at '%s'", name);
417 goto bail;
418 }
419
420 comma = strchr(name, ','); // use name, not value, for safety
421 if (comma != NULL) {
422 if (comma < value) {
423 ALOGE("JDWP opts: found comma before '=' in '%s'", mangle);
424 goto bail;
425 }
426 *comma = '\0';
427 }
428
429 *value++ = '\0'; // stomp the '='
430
431 if (!handleJdwpOption(name, value))
432 goto bail;
433
434 if (comma == NULL) {
435 /* out of options */
436 break;
437 }
438 name = comma+1;
439 }
440
441 /*
442 * Make sure the combination of arguments makes sense.
443 */
444 if (gDvm.jdwpTransport == kJdwpTransportUnknown) {
445 ALOGE("JDWP opts: must specify transport");
446 goto bail;
447 }
448 if (!gDvm.jdwpServer && (gDvm.jdwpHost == NULL || gDvm.jdwpPort == 0)) {
449 ALOGE("JDWP opts: when server=n, must specify host and port");
450 goto bail;
451 }
452 // transport mandatory
453 // outbound server address
454
455 gDvm.jdwpConfigured = true;
456 result = true;
457
458 bail:
459 free(mangle);
460 return result;
461 }
462
463 /*
464 * Handle one of the four kinds of assertion arguments.
465 *
466 * "pkgOrClass" is the last part of an enable/disable line. For a package
467 * the arg looks like "-ea:com.google.fubar...", for a class it looks
468 * like "-ea:com.google.fubar.Wahoo". The string we get starts at the ':'.
469 *
470 * For system assertions (-esa/-dsa), "pkgOrClass" is NULL.
471 *
472 * Multiple instances of these arguments can be specified, e.g. you can
473 * enable assertions for a package and then disable them for one class in
474 * the package.
475 */
enableAssertions(const char * pkgOrClass,bool enable)476 static bool enableAssertions(const char* pkgOrClass, bool enable)
477 {
478 AssertionControl* pCtrl = &gDvm.assertionCtrl[gDvm.assertionCtrlCount++];
479 pCtrl->enable = enable;
480
481 if (pkgOrClass == NULL) {
482 /* enable or disable for all system classes */
483 pCtrl->isPackage = false;
484 pCtrl->pkgOrClass = NULL;
485 pCtrl->pkgOrClassLen = 0;
486 } else {
487 if (*pkgOrClass == '\0') {
488 /* global enable/disable for all but system */
489 pCtrl->isPackage = false;
490 pCtrl->pkgOrClass = strdup("");
491 pCtrl->pkgOrClassLen = 0;
492 } else {
493 pCtrl->pkgOrClass = dvmDotToSlash(pkgOrClass+1); // skip ':'
494 if (pCtrl->pkgOrClass == NULL) {
495 /* can happen if class name includes an illegal '/' */
496 ALOGW("Unable to process assertion arg '%s'", pkgOrClass);
497 return false;
498 }
499
500 int len = strlen(pCtrl->pkgOrClass);
501 if (len >= 3 && strcmp(pCtrl->pkgOrClass + len-3, "///") == 0) {
502 /* mark as package, truncate two of the three slashes */
503 pCtrl->isPackage = true;
504 *(pCtrl->pkgOrClass + len-2) = '\0';
505 pCtrl->pkgOrClassLen = len - 2;
506 } else {
507 /* just a class */
508 pCtrl->isPackage = false;
509 pCtrl->pkgOrClassLen = len;
510 }
511 }
512 }
513
514 return true;
515 }
516
517 /*
518 * Turn assertions on when requested to do so by the Zygote.
519 *
520 * This is a bit sketchy. We can't (easily) go back and fiddle with all
521 * of the classes that have already been initialized, so this only
522 * affects classes that have yet to be loaded. If some or all assertions
523 * have been enabled through some other means, we don't want to mess with
524 * it here, so we do nothing. Finally, we assume that there's room in
525 * "assertionCtrl" to hold at least one entry; this is guaranteed by the
526 * allocator.
527 *
528 * This must only be called from the main thread during zygote init.
529 */
dvmLateEnableAssertions()530 void dvmLateEnableAssertions()
531 {
532 if (gDvm.assertionCtrl == NULL) {
533 ALOGD("Not late-enabling assertions: no assertionCtrl array");
534 return;
535 } else if (gDvm.assertionCtrlCount != 0) {
536 ALOGD("Not late-enabling assertions: some asserts already configured");
537 return;
538 }
539 ALOGD("Late-enabling assertions");
540
541 /* global enable for all but system */
542 AssertionControl* pCtrl = gDvm.assertionCtrl;
543 pCtrl->pkgOrClass = strdup("");
544 pCtrl->pkgOrClassLen = 0;
545 pCtrl->isPackage = false;
546 pCtrl->enable = true;
547 gDvm.assertionCtrlCount = 1;
548 }
549
550
551 /*
552 * Release memory associated with the AssertionCtrl array.
553 */
freeAssertionCtrl()554 static void freeAssertionCtrl()
555 {
556 int i;
557
558 for (i = 0; i < gDvm.assertionCtrlCount; i++)
559 free(gDvm.assertionCtrl[i].pkgOrClass);
560 free(gDvm.assertionCtrl);
561 }
562
563 #if defined(WITH_JIT)
564 /* Parse -Xjitop to selectively turn on/off certain opcodes for JIT */
processXjitop(const char * opt)565 static void processXjitop(const char* opt)
566 {
567 if (opt[7] == ':') {
568 const char* startPtr = &opt[8];
569 char* endPtr = NULL;
570
571 do {
572 long startValue, endValue;
573
574 startValue = strtol(startPtr, &endPtr, 16);
575 if (startPtr != endPtr) {
576 /* Just in case value is out of range */
577 startValue %= kNumPackedOpcodes;
578
579 if (*endPtr == '-') {
580 endValue = strtol(endPtr+1, &endPtr, 16);
581 endValue %= kNumPackedOpcodes;
582 } else {
583 endValue = startValue;
584 }
585
586 for (; startValue <= endValue; startValue++) {
587 ALOGW("Dalvik opcode %x is selected for debugging",
588 (unsigned int) startValue);
589 /* Mark the corresponding bit to 1 */
590 gDvmJit.opList[startValue >> 3] |= 1 << (startValue & 0x7);
591 }
592
593 if (*endPtr == 0) {
594 break;
595 }
596
597 startPtr = endPtr + 1;
598
599 continue;
600 } else {
601 if (*endPtr != 0) {
602 dvmFprintf(stderr,
603 "Warning: Unrecognized opcode value substring "
604 "%s\n", endPtr);
605 }
606 break;
607 }
608 } while (1);
609 } else {
610 int i;
611 for (i = 0; i < (kNumPackedOpcodes+7)/8; i++) {
612 gDvmJit.opList[i] = 0xff;
613 }
614 dvmFprintf(stderr, "Warning: select all opcodes\n");
615 }
616 }
617
618 /* Parse -Xjitoffset to selectively turn on/off traces with certain offsets for JIT */
processXjitoffset(const char * opt)619 static void processXjitoffset(const char* opt) {
620 gDvmJit.num_entries_pcTable = 0;
621 char* buf = strdup(opt);
622 char* start, *end;
623 start = buf;
624 int idx = 0;
625 do {
626 end = strchr(start, ',');
627 if (end) {
628 *end = 0;
629 }
630
631 dvmFprintf(stderr, "processXjitoffset start = %s\n", start);
632 char* tmp = strdup(start);
633 gDvmJit.pcTable[idx++] = atoi(tmp);
634 free(tmp);
635 if (idx >= COMPILER_PC_OFFSET_SIZE) {
636 dvmFprintf(stderr, "processXjitoffset: ignore entries beyond %d\n", COMPILER_PC_OFFSET_SIZE);
637 break;
638 }
639 if (end) {
640 start = end + 1;
641 } else {
642 break;
643 }
644 } while (1);
645 gDvmJit.num_entries_pcTable = idx;
646 free(buf);
647 }
648
649 /* Parse -Xjitmethod to selectively turn on/off certain methods for JIT */
processXjitmethod(const char * opt,bool isMethod)650 static void processXjitmethod(const char* opt, bool isMethod) {
651 char* buf = strdup(opt);
652
653 if (isMethod && gDvmJit.methodTable == NULL) {
654 gDvmJit.methodTable = dvmHashTableCreate(8, NULL);
655 }
656 if (!isMethod && gDvmJit.classTable == NULL) {
657 gDvmJit.classTable = dvmHashTableCreate(8, NULL);
658 }
659
660 char* start = buf;
661 char* end;
662 /*
663 * Break comma-separated method signatures and enter them into the hash
664 * table individually.
665 */
666 do {
667 int hashValue;
668
669 end = strchr(start, ',');
670 if (end) {
671 *end = 0;
672 }
673
674 hashValue = dvmComputeUtf8Hash(start);
675 dvmHashTableLookup(isMethod ? gDvmJit.methodTable : gDvmJit.classTable,
676 hashValue, strdup(start), (HashCompareFunc) strcmp, true);
677
678 if (end) {
679 start = end + 1;
680 } else {
681 break;
682 }
683 } while (1);
684 free(buf);
685 }
686
687 /* The format of jit_config.list:
688 EXCLUDE or INCLUDE
689 CLASS
690 prefix1 ...
691 METHOD
692 prefix 1 ...
693 OFFSET
694 index ... //each pair is a range, if pcOff falls into a range, JIT
695 */
processXjitconfig(const char * opt)696 static int processXjitconfig(const char* opt) {
697 FILE* fp = fopen(opt, "r");
698 if (fp == NULL) {
699 return -1;
700 }
701
702 char fLine[500];
703 bool startClass = false, startMethod = false, startOffset = false;
704 gDvmJit.num_entries_pcTable = 0;
705 int idx = 0;
706
707 while (fgets(fLine, 500, fp) != NULL) {
708 char* curLine = strtok(fLine, " \t\r\n");
709 /* handles keyword CLASS, METHOD, INCLUDE, EXCLUDE */
710 if (!strncmp(curLine, "CLASS", 5)) {
711 startClass = true;
712 startMethod = false;
713 startOffset = false;
714 continue;
715 }
716 if (!strncmp(curLine, "METHOD", 6)) {
717 startMethod = true;
718 startClass = false;
719 startOffset = false;
720 continue;
721 }
722 if (!strncmp(curLine, "OFFSET", 6)) {
723 startOffset = true;
724 startMethod = false;
725 startClass = false;
726 continue;
727 }
728 if (!strncmp(curLine, "EXCLUDE", 7)) {
729 gDvmJit.includeSelectedMethod = false;
730 continue;
731 }
732 if (!strncmp(curLine, "INCLUDE", 7)) {
733 gDvmJit.includeSelectedMethod = true;
734 continue;
735 }
736 if (!startMethod && !startClass && !startOffset) {
737 continue;
738 }
739
740 int hashValue = dvmComputeUtf8Hash(curLine);
741 if (startMethod) {
742 if (gDvmJit.methodTable == NULL) {
743 gDvmJit.methodTable = dvmHashTableCreate(8, NULL);
744 }
745 dvmHashTableLookup(gDvmJit.methodTable, hashValue,
746 strdup(curLine),
747 (HashCompareFunc) strcmp, true);
748 } else if (startClass) {
749 if (gDvmJit.classTable == NULL) {
750 gDvmJit.classTable = dvmHashTableCreate(8, NULL);
751 }
752 dvmHashTableLookup(gDvmJit.classTable, hashValue,
753 strdup(curLine),
754 (HashCompareFunc) strcmp, true);
755 } else if (startOffset) {
756 int tmpInt = atoi(curLine);
757 gDvmJit.pcTable[idx++] = tmpInt;
758 if (idx >= COMPILER_PC_OFFSET_SIZE) {
759 printf("processXjitoffset: ignore entries beyond %d\n", COMPILER_PC_OFFSET_SIZE);
760 break;
761 }
762 }
763 }
764 gDvmJit.num_entries_pcTable = idx;
765 fclose(fp);
766 return 0;
767 }
768 #endif
769
770 /*
771 * Process an argument vector full of options. Unlike standard C programs,
772 * argv[0] does not contain the name of the program.
773 *
774 * If "ignoreUnrecognized" is set, we ignore options starting with "-X" or "_"
775 * that we don't recognize. Otherwise, we return with an error as soon as
776 * we see anything we can't identify.
777 *
778 * Returns 0 on success, -1 on failure, and 1 for the special case of
779 * "-version" where we want to stop without showing an error message.
780 */
processOptions(int argc,const char * const argv[],bool ignoreUnrecognized)781 static int processOptions(int argc, const char* const argv[],
782 bool ignoreUnrecognized)
783 {
784 int i;
785
786 ALOGV("VM options (%d):", argc);
787 for (i = 0; i < argc; i++)
788 ALOGV(" %d: '%s'", i, argv[i]);
789
790 /*
791 * Over-allocate AssertionControl array for convenience. If allocated,
792 * the array must be able to hold at least one entry, so that the
793 * zygote-time activation can do its business.
794 */
795 assert(gDvm.assertionCtrl == NULL);
796 if (argc > 0) {
797 gDvm.assertionCtrl =
798 (AssertionControl*) malloc(sizeof(AssertionControl) * argc);
799 if (gDvm.assertionCtrl == NULL)
800 return -1;
801 assert(gDvm.assertionCtrlCount == 0);
802 }
803
804 for (i = 0; i < argc; i++) {
805 if (strcmp(argv[i], "-help") == 0) {
806 /* show usage and stop */
807 return -1;
808
809 } else if (strcmp(argv[i], "-version") == 0) {
810 /* show version and stop */
811 showVersion();
812 return 1;
813 } else if (strcmp(argv[i], "-showversion") == 0) {
814 /* show version and continue */
815 showVersion();
816
817 } else if (strcmp(argv[i], "-classpath") == 0 ||
818 strcmp(argv[i], "-cp") == 0)
819 {
820 /* set classpath */
821 if (i == argc-1) {
822 dvmFprintf(stderr, "Missing classpath path list\n");
823 return -1;
824 }
825 free(gDvm.classPathStr); /* in case we have compiled-in default */
826 gDvm.classPathStr = strdup(argv[++i]);
827
828 } else if (strncmp(argv[i], "-Xbootclasspath:",
829 sizeof("-Xbootclasspath:")-1) == 0)
830 {
831 /* set bootclasspath */
832 const char* path = argv[i] + sizeof("-Xbootclasspath:")-1;
833
834 if (*path == '\0') {
835 dvmFprintf(stderr, "Missing bootclasspath path list\n");
836 return -1;
837 }
838 free(gDvm.bootClassPathStr);
839 gDvm.bootClassPathStr = strdup(path);
840
841 } else if (strncmp(argv[i], "-Xbootclasspath/a:",
842 sizeof("-Xbootclasspath/a:")-1) == 0) {
843 const char* appPath = argv[i] + sizeof("-Xbootclasspath/a:")-1;
844
845 if (*(appPath) == '\0') {
846 dvmFprintf(stderr, "Missing appending bootclasspath path list\n");
847 return -1;
848 }
849 char* allPath;
850
851 if (asprintf(&allPath, "%s:%s", gDvm.bootClassPathStr, appPath) < 0) {
852 dvmFprintf(stderr, "Can't append to bootclasspath path list\n");
853 return -1;
854 }
855 free(gDvm.bootClassPathStr);
856 gDvm.bootClassPathStr = allPath;
857
858 } else if (strncmp(argv[i], "-Xbootclasspath/p:",
859 sizeof("-Xbootclasspath/p:")-1) == 0) {
860 const char* prePath = argv[i] + sizeof("-Xbootclasspath/p:")-1;
861
862 if (*(prePath) == '\0') {
863 dvmFprintf(stderr, "Missing prepending bootclasspath path list\n");
864 return -1;
865 }
866 char* allPath;
867
868 if (asprintf(&allPath, "%s:%s", prePath, gDvm.bootClassPathStr) < 0) {
869 dvmFprintf(stderr, "Can't prepend to bootclasspath path list\n");
870 return -1;
871 }
872 free(gDvm.bootClassPathStr);
873 gDvm.bootClassPathStr = allPath;
874
875 } else if (strncmp(argv[i], "-D", 2) == 0) {
876 /* Properties are handled in managed code. We just check syntax. */
877 if (strchr(argv[i], '=') == NULL) {
878 dvmFprintf(stderr, "Bad system property setting: \"%s\"\n",
879 argv[i]);
880 return -1;
881 }
882 gDvm.properties->push_back(argv[i] + 2);
883
884 } else if (strcmp(argv[i], "-jar") == 0) {
885 // TODO: handle this; name of jar should be in argv[i+1]
886 dvmFprintf(stderr, "-jar not yet handled\n");
887 assert(false);
888
889 } else if (strncmp(argv[i], "-Xms", 4) == 0) {
890 size_t val = parseMemOption(argv[i]+4, 1024);
891 if (val != 0) {
892 if (val >= kMinHeapStartSize && val <= kMaxHeapSize) {
893 gDvm.heapStartingSize = val;
894 } else {
895 dvmFprintf(stderr,
896 "Invalid -Xms '%s', range is %dKB to %dKB\n",
897 argv[i], kMinHeapStartSize/1024, kMaxHeapSize/1024);
898 return -1;
899 }
900 } else {
901 dvmFprintf(stderr, "Invalid -Xms option '%s'\n", argv[i]);
902 return -1;
903 }
904 } else if (strncmp(argv[i], "-Xmx", 4) == 0) {
905 size_t val = parseMemOption(argv[i]+4, 1024);
906 if (val != 0) {
907 if (val >= kMinHeapSize && val <= kMaxHeapSize) {
908 gDvm.heapMaximumSize = val;
909 } else {
910 dvmFprintf(stderr,
911 "Invalid -Xmx '%s', range is %dKB to %dKB\n",
912 argv[i], kMinHeapSize/1024, kMaxHeapSize/1024);
913 return -1;
914 }
915 } else {
916 dvmFprintf(stderr, "Invalid -Xmx option '%s'\n", argv[i]);
917 return -1;
918 }
919 } else if (strncmp(argv[i], "-XX:HeapGrowthLimit=", 20) == 0) {
920 size_t val = parseMemOption(argv[i] + 20, 1024);
921 if (val != 0) {
922 gDvm.heapGrowthLimit = val;
923 } else {
924 dvmFprintf(stderr, "Invalid -XX:HeapGrowthLimit option '%s'\n", argv[i]);
925 return -1;
926 }
927 } else if (strncmp(argv[i], "-XX:HeapMinFree=", 16) == 0) {
928 size_t val = parseMemOption(argv[i] + 16, 1024);
929 if (val != 0) {
930 gDvm.heapMinFree = val;
931 } else {
932 dvmFprintf(stderr, "Invalid -XX:HeapMinFree option '%s'\n", argv[i]);
933 return -1;
934 }
935 } else if (strncmp(argv[i], "-XX:HeapMaxFree=", 16) == 0) {
936 size_t val = parseMemOption(argv[i] + 16, 1024);
937 if (val != 0) {
938 gDvm.heapMaxFree = val;
939 } else {
940 dvmFprintf(stderr, "Invalid -XX:HeapMaxFree option '%s'\n", argv[i]);
941 return -1;
942 }
943 } else if (strncmp(argv[i], "-XX:HeapTargetUtilization=", 26) == 0) {
944 const char* start = argv[i] + 26;
945 const char* end = start;
946 double val = strtod(start, const_cast<char**>(&end));
947 // Ensure that we have a value, there was no cruft after it and it
948 // satisfies a sensible range.
949 bool sane_val = (start != end) && (end[0] == '\0') &&
950 (val >= 0.1) && (val <= 0.9);
951 if (sane_val) {
952 gDvm.heapTargetUtilization = val;
953 } else {
954 dvmFprintf(stderr, "Invalid -XX:HeapTargetUtilization option '%s'\n", argv[i]);
955 return -1;
956 }
957 } else if (strncmp(argv[i], "-Xss", 4) == 0) {
958 size_t val = parseMemOption(argv[i]+4, 1);
959 if (val != 0) {
960 if (val >= kMinStackSize && val <= kMaxStackSize) {
961 gDvm.stackSize = val;
962 if (val > gDvm.mainThreadStackSize) {
963 gDvm.mainThreadStackSize = val;
964 }
965 } else {
966 dvmFprintf(stderr, "Invalid -Xss '%s', range is %d to %d\n",
967 argv[i], kMinStackSize, kMaxStackSize);
968 return -1;
969 }
970 } else {
971 dvmFprintf(stderr, "Invalid -Xss option '%s'\n", argv[i]);
972 return -1;
973 }
974
975 } else if (strncmp(argv[i], "-XX:mainThreadStackSize=", strlen("-XX:mainThreadStackSize=")) == 0) {
976 size_t val = parseMemOption(argv[i] + strlen("-XX:mainThreadStackSize="), 1);
977 if (val != 0) {
978 if (val >= kMinStackSize && val <= kMaxStackSize) {
979 gDvm.mainThreadStackSize = val;
980 } else {
981 dvmFprintf(stderr, "Invalid -XX:mainThreadStackSize '%s', range is %d to %d\n",
982 argv[i], kMinStackSize, kMaxStackSize);
983 return -1;
984 }
985 } else {
986 dvmFprintf(stderr, "Invalid -XX:mainThreadStackSize option '%s'\n", argv[i]);
987 return -1;
988 }
989
990 } else if (strncmp(argv[i], "-XX:+DisableExplicitGC", 22) == 0) {
991 gDvm.disableExplicitGc = true;
992 } else if (strcmp(argv[i], "-verbose") == 0 ||
993 strcmp(argv[i], "-verbose:class") == 0)
994 {
995 // JNI spec says "-verbose:gc,class" is valid, but cmd line
996 // doesn't work that way; may want to support.
997 gDvm.verboseClass = true;
998 } else if (strcmp(argv[i], "-verbose:jni") == 0) {
999 gDvm.verboseJni = true;
1000 } else if (strcmp(argv[i], "-verbose:gc") == 0) {
1001 gDvm.verboseGc = true;
1002 } else if (strcmp(argv[i], "-verbose:shutdown") == 0) {
1003 gDvm.verboseShutdown = true;
1004
1005 } else if (strncmp(argv[i], "-enableassertions", 17) == 0) {
1006 enableAssertions(argv[i] + 17, true);
1007 } else if (strncmp(argv[i], "-ea", 3) == 0) {
1008 enableAssertions(argv[i] + 3, true);
1009 } else if (strncmp(argv[i], "-disableassertions", 18) == 0) {
1010 enableAssertions(argv[i] + 18, false);
1011 } else if (strncmp(argv[i], "-da", 3) == 0) {
1012 enableAssertions(argv[i] + 3, false);
1013 } else if (strcmp(argv[i], "-enablesystemassertions") == 0 ||
1014 strcmp(argv[i], "-esa") == 0)
1015 {
1016 enableAssertions(NULL, true);
1017 } else if (strcmp(argv[i], "-disablesystemassertions") == 0 ||
1018 strcmp(argv[i], "-dsa") == 0)
1019 {
1020 enableAssertions(NULL, false);
1021
1022 } else if (strncmp(argv[i], "-Xcheck:jni", 11) == 0) {
1023 /* nothing to do now -- was handled during JNI init */
1024
1025 } else if (strcmp(argv[i], "-Xdebug") == 0) {
1026 /* accept but ignore */
1027
1028 } else if (strncmp(argv[i], "-Xrunjdwp:", 10) == 0 ||
1029 strncmp(argv[i], "-agentlib:jdwp=", 15) == 0)
1030 {
1031 const char* tail;
1032
1033 if (argv[i][1] == 'X')
1034 tail = argv[i] + 10;
1035 else
1036 tail = argv[i] + 15;
1037
1038 if (strncmp(tail, "help", 4) == 0 || !parseJdwpOptions(tail)) {
1039 showJdwpHelp();
1040 return 1;
1041 }
1042 } else if (strcmp(argv[i], "-Xrs") == 0) {
1043 gDvm.reduceSignals = true;
1044 } else if (strcmp(argv[i], "-Xnoquithandler") == 0) {
1045 /* disables SIGQUIT handler thread while still blocking SIGQUIT */
1046 /* (useful if we don't want thread but system still signals us) */
1047 gDvm.noQuitHandler = true;
1048 } else if (strcmp(argv[i], "-Xzygote") == 0) {
1049 gDvm.zygote = true;
1050 #if defined(WITH_JIT)
1051 gDvmJit.runningInAndroidFramework = true;
1052 #endif
1053 } else if (strncmp(argv[i], "-Xdexopt:", 9) == 0) {
1054 if (strcmp(argv[i] + 9, "none") == 0)
1055 gDvm.dexOptMode = OPTIMIZE_MODE_NONE;
1056 else if (strcmp(argv[i] + 9, "verified") == 0)
1057 gDvm.dexOptMode = OPTIMIZE_MODE_VERIFIED;
1058 else if (strcmp(argv[i] + 9, "all") == 0)
1059 gDvm.dexOptMode = OPTIMIZE_MODE_ALL;
1060 else if (strcmp(argv[i] + 9, "full") == 0)
1061 gDvm.dexOptMode = OPTIMIZE_MODE_FULL;
1062 else {
1063 dvmFprintf(stderr, "Unrecognized dexopt option '%s'\n",argv[i]);
1064 return -1;
1065 }
1066 } else if (strncmp(argv[i], "-Xverify:", 9) == 0) {
1067 if (strcmp(argv[i] + 9, "none") == 0)
1068 gDvm.classVerifyMode = VERIFY_MODE_NONE;
1069 else if (strcmp(argv[i] + 9, "remote") == 0)
1070 gDvm.classVerifyMode = VERIFY_MODE_REMOTE;
1071 else if (strcmp(argv[i] + 9, "all") == 0)
1072 gDvm.classVerifyMode = VERIFY_MODE_ALL;
1073 else {
1074 dvmFprintf(stderr, "Unrecognized verify option '%s'\n",argv[i]);
1075 return -1;
1076 }
1077 } else if (strncmp(argv[i], "-Xjnigreflimit:", 15) == 0) {
1078 int lim = atoi(argv[i] + 15);
1079 if (lim < 200 || (lim % 100) != 0) {
1080 dvmFprintf(stderr, "Bad value for -Xjnigreflimit: '%s'\n",
1081 argv[i]+15);
1082 return -1;
1083 }
1084 gDvm.jniGrefLimit = lim;
1085 } else if (strncmp(argv[i], "-Xjnitrace:", 11) == 0) {
1086 gDvm.jniTrace = strdup(argv[i] + 11);
1087 } else if (strcmp(argv[i], "-Xlog-stdio") == 0) {
1088 gDvm.logStdio = true;
1089
1090 } else if (strncmp(argv[i], "-Xint", 5) == 0) {
1091 if (argv[i][5] == ':') {
1092 if (strcmp(argv[i] + 6, "portable") == 0)
1093 gDvm.executionMode = kExecutionModeInterpPortable;
1094 else if (strcmp(argv[i] + 6, "fast") == 0)
1095 gDvm.executionMode = kExecutionModeInterpFast;
1096 #ifdef WITH_JIT
1097 else if (strcmp(argv[i] + 6, "jit") == 0)
1098 gDvm.executionMode = kExecutionModeJit;
1099 #endif
1100 else {
1101 dvmFprintf(stderr,
1102 "Warning: Unrecognized interpreter mode %s\n",argv[i]);
1103 /* keep going */
1104 }
1105 } else {
1106 /* disable JIT if it was enabled by default */
1107 gDvm.executionMode = kExecutionModeInterpFast;
1108 }
1109
1110 } else if (strncmp(argv[i], "-Xlockprofthreshold:", 20) == 0) {
1111 gDvm.lockProfThreshold = atoi(argv[i] + 20);
1112
1113 #ifdef WITH_JIT
1114 } else if (strncmp(argv[i], "-Xjitop", 7) == 0) {
1115 processXjitop(argv[i]);
1116 } else if (strncmp(argv[i], "-Xjitmethod:", 12) == 0) {
1117 processXjitmethod(argv[i] + strlen("-Xjitmethod:"), true);
1118 } else if (strncmp(argv[i], "-Xjitclass:", 11) == 0) {
1119 processXjitmethod(argv[i] + strlen("-Xjitclass:"), false);
1120 } else if (strncmp(argv[i], "-Xjitoffset:", 12) == 0) {
1121 processXjitoffset(argv[i] + strlen("-Xjitoffset:"));
1122 } else if (strncmp(argv[i], "-Xjitconfig:", 12) == 0) {
1123 processXjitconfig(argv[i] + strlen("-Xjitconfig:"));
1124 } else if (strncmp(argv[i], "-Xjitblocking", 13) == 0) {
1125 gDvmJit.blockingMode = true;
1126 } else if (strncmp(argv[i], "-Xjitthreshold:", 15) == 0) {
1127 gDvmJit.threshold = atoi(argv[i] + 15);
1128 } else if (strncmp(argv[i], "-Xincludeselectedop", 19) == 0) {
1129 gDvmJit.includeSelectedOp = true;
1130 } else if (strncmp(argv[i], "-Xincludeselectedmethod", 23) == 0) {
1131 gDvmJit.includeSelectedMethod = true;
1132 } else if (strncmp(argv[i], "-Xjitcheckcg", 12) == 0) {
1133 gDvmJit.checkCallGraph = true;
1134 /* Need to enable blocking mode due to stack crawling */
1135 gDvmJit.blockingMode = true;
1136 } else if (strncmp(argv[i], "-Xjitdumpbin", 12) == 0) {
1137 gDvmJit.printBinary = true;
1138 } else if (strncmp(argv[i], "-Xjitverbose", 12) == 0) {
1139 gDvmJit.printMe = true;
1140 } else if (strncmp(argv[i], "-Xjitprofile", 12) == 0) {
1141 gDvmJit.profileMode = kTraceProfilingContinuous;
1142 } else if (strncmp(argv[i], "-Xjitdisableopt", 15) == 0) {
1143 /* Disable selected optimizations */
1144 if (argv[i][15] == ':') {
1145 sscanf(argv[i] + 16, "%x", &gDvmJit.disableOpt);
1146 /* Disable all optimizations */
1147 } else {
1148 gDvmJit.disableOpt = -1;
1149 }
1150 } else if (strncmp(argv[i], "-Xjitsuspendpoll", 16) == 0) {
1151 gDvmJit.genSuspendPoll = true;
1152 #endif
1153
1154 } else if (strncmp(argv[i], "-Xstacktracefile:", 17) == 0) {
1155 gDvm.stackTraceFile = strdup(argv[i]+17);
1156
1157 } else if (strcmp(argv[i], "-Xgenregmap") == 0) {
1158 gDvm.generateRegisterMaps = true;
1159 } else if (strcmp(argv[i], "-Xnogenregmap") == 0) {
1160 gDvm.generateRegisterMaps = false;
1161
1162 } else if (strcmp(argv[i], "Xverifyopt:checkmon") == 0) {
1163 gDvm.monitorVerification = true;
1164 } else if (strcmp(argv[i], "Xverifyopt:nocheckmon") == 0) {
1165 gDvm.monitorVerification = false;
1166
1167 } else if (strncmp(argv[i], "-Xgc:", 5) == 0) {
1168 if (strcmp(argv[i] + 5, "precise") == 0)
1169 gDvm.preciseGc = true;
1170 else if (strcmp(argv[i] + 5, "noprecise") == 0)
1171 gDvm.preciseGc = false;
1172 else if (strcmp(argv[i] + 5, "preverify") == 0)
1173 gDvm.preVerify = true;
1174 else if (strcmp(argv[i] + 5, "nopreverify") == 0)
1175 gDvm.preVerify = false;
1176 else if (strcmp(argv[i] + 5, "postverify") == 0)
1177 gDvm.postVerify = true;
1178 else if (strcmp(argv[i] + 5, "nopostverify") == 0)
1179 gDvm.postVerify = false;
1180 else if (strcmp(argv[i] + 5, "concurrent") == 0)
1181 gDvm.concurrentMarkSweep = true;
1182 else if (strcmp(argv[i] + 5, "noconcurrent") == 0)
1183 gDvm.concurrentMarkSweep = false;
1184 else if (strcmp(argv[i] + 5, "verifycardtable") == 0)
1185 gDvm.verifyCardTable = true;
1186 else if (strcmp(argv[i] + 5, "noverifycardtable") == 0)
1187 gDvm.verifyCardTable = false;
1188 else {
1189 dvmFprintf(stderr, "Bad value for -Xgc");
1190 return -1;
1191 }
1192 ALOGV("Precise GC configured %s", gDvm.preciseGc ? "ON" : "OFF");
1193
1194 } else if (strcmp(argv[i], "-Xcheckdexsum") == 0) {
1195 gDvm.verifyDexChecksum = true;
1196
1197 } else if (strcmp(argv[i], "-Xprofile:threadcpuclock") == 0) {
1198 gDvm.profilerClockSource = kProfilerClockSourceThreadCpu;
1199 } else if (strcmp(argv[i], "-Xprofile:wallclock") == 0) {
1200 gDvm.profilerClockSource = kProfilerClockSourceWall;
1201 } else if (strcmp(argv[i], "-Xprofile:dualclock") == 0) {
1202 gDvm.profilerClockSource = kProfilerClockSourceDual;
1203
1204 } else {
1205 if (!ignoreUnrecognized) {
1206 dvmFprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
1207 return -1;
1208 }
1209 }
1210 }
1211
1212 return 0;
1213 }
1214
1215 /*
1216 * Set defaults for fields altered or modified by arguments.
1217 *
1218 * Globals are initialized to 0 (a/k/a NULL or false).
1219 */
setCommandLineDefaults()1220 static void setCommandLineDefaults()
1221 {
1222 const char* envStr = getenv("CLASSPATH");
1223 if (envStr != NULL) {
1224 gDvm.classPathStr = strdup(envStr);
1225 } else {
1226 gDvm.classPathStr = strdup(".");
1227 }
1228 envStr = getenv("BOOTCLASSPATH");
1229 if (envStr != NULL) {
1230 gDvm.bootClassPathStr = strdup(envStr);
1231 } else {
1232 gDvm.bootClassPathStr = strdup(".");
1233 }
1234
1235 gDvm.properties = new std::vector<std::string>();
1236
1237 /* Defaults overridden by -Xms and -Xmx.
1238 * TODO: base these on a system or application-specific default
1239 */
1240 gDvm.heapStartingSize = 2 * 1024 * 1024; // Spec says 16MB; too big for us.
1241 gDvm.heapMaximumSize = 16 * 1024 * 1024; // Spec says 75% physical mem
1242 gDvm.heapGrowthLimit = 0; // 0 means no growth limit
1243 gDvm.stackSize = kDefaultStackSize;
1244 gDvm.mainThreadStackSize = kDefaultStackSize;
1245 // When the heap is less than the maximum or growth limited size,
1246 // fix the free portion of the heap. The utilization is the ratio
1247 // of live to free memory, 0.5 implies half the heap is available
1248 // to allocate into before a GC occurs. Min free and max free
1249 // force the free memory to never be smaller than min free or
1250 // larger than max free.
1251 gDvm.heapTargetUtilization = 0.5;
1252 gDvm.heapMaxFree = 2 * 1024 * 1024;
1253 gDvm.heapMinFree = gDvm.heapMaxFree / 4;
1254
1255 gDvm.concurrentMarkSweep = true;
1256
1257 /* gDvm.jdwpSuspend = true; */
1258
1259 /* allowed unless zygote config doesn't allow it */
1260 gDvm.jdwpAllowed = true;
1261
1262 /* default verification and optimization modes */
1263 gDvm.classVerifyMode = VERIFY_MODE_ALL;
1264 gDvm.dexOptMode = OPTIMIZE_MODE_VERIFIED;
1265 gDvm.monitorVerification = false;
1266 gDvm.generateRegisterMaps = true;
1267 gDvm.registerMapMode = kRegisterMapModeTypePrecise;
1268
1269 /*
1270 * Default execution mode.
1271 *
1272 * This should probably interact with the mterp code somehow, e.g. if
1273 * we know we're using the "desktop" build we should probably be
1274 * using "portable" rather than "fast".
1275 */
1276 #if defined(WITH_JIT)
1277 gDvm.executionMode = kExecutionModeJit;
1278 gDvmJit.num_entries_pcTable = 0;
1279 gDvmJit.includeSelectedMethod = false;
1280 gDvmJit.includeSelectedOffset = false;
1281 gDvmJit.methodTable = NULL;
1282 gDvmJit.classTable = NULL;
1283
1284 gDvm.constInit = false;
1285 gDvm.commonInit = false;
1286 #else
1287 gDvm.executionMode = kExecutionModeInterpFast;
1288 #endif
1289
1290 /*
1291 * SMP support is a compile-time define, but we may want to have
1292 * dexopt target a differently-configured device.
1293 */
1294 gDvm.dexOptForSmp = (ANDROID_SMP != 0);
1295
1296 /*
1297 * Default profiler configuration.
1298 */
1299 gDvm.profilerClockSource = kProfilerClockSourceDual;
1300 }
1301
1302
1303 /*
1304 * Handle a SIGBUS, which frequently occurs because somebody replaced an
1305 * optimized DEX file out from under us.
1306 */
busCatcher(int signum,siginfo_t * info,void * context)1307 static void busCatcher(int signum, siginfo_t* info, void* context)
1308 {
1309 void* addr = info->si_addr;
1310
1311 ALOGE("Caught a SIGBUS (%d), addr=%p", signum, addr);
1312
1313 /*
1314 * If we return at this point the SIGBUS just keeps happening, so we
1315 * remove the signal handler and allow it to kill us. TODO: restore
1316 * the original, which points to a debuggerd stub; if we don't then
1317 * debuggerd won't be notified.
1318 */
1319 signal(SIGBUS, SIG_DFL);
1320 }
1321
1322 /*
1323 * Configure signals. We need to block SIGQUIT so that the signal only
1324 * reaches the dump-stack-trace thread.
1325 *
1326 * This can be disabled with the "-Xrs" flag.
1327 */
blockSignals()1328 static void blockSignals()
1329 {
1330 sigset_t mask;
1331 int cc;
1332
1333 sigemptyset(&mask);
1334 sigaddset(&mask, SIGQUIT);
1335 sigaddset(&mask, SIGUSR1); // used to initiate heap dump
1336 #if defined(WITH_JIT) && defined(WITH_JIT_TUNING)
1337 sigaddset(&mask, SIGUSR2); // used to investigate JIT internals
1338 #endif
1339 //sigaddset(&mask, SIGPIPE);
1340 cc = sigprocmask(SIG_BLOCK, &mask, NULL);
1341 assert(cc == 0);
1342
1343 if (false) {
1344 /* TODO: save the old sigaction in a global */
1345 struct sigaction sa;
1346 memset(&sa, 0, sizeof(sa));
1347 sa.sa_sigaction = busCatcher;
1348 sa.sa_flags = SA_SIGINFO;
1349 cc = sigaction(SIGBUS, &sa, NULL);
1350 assert(cc == 0);
1351 }
1352 }
1353
1354 class ScopedShutdown {
1355 public:
ScopedShutdown()1356 ScopedShutdown() : armed_(true) {
1357 }
1358
~ScopedShutdown()1359 ~ScopedShutdown() {
1360 if (armed_) {
1361 dvmShutdown();
1362 }
1363 }
1364
disarm()1365 void disarm() {
1366 armed_ = false;
1367 }
1368
1369 private:
1370 bool armed_;
1371 };
1372
1373 /*
1374 * VM initialization. Pass in any options provided on the command line.
1375 * Do not pass in the class name or the options for the class.
1376 *
1377 * Returns 0 on success.
1378 */
dvmStartup(int argc,const char * const argv[],bool ignoreUnrecognized,JNIEnv * pEnv)1379 std::string dvmStartup(int argc, const char* const argv[],
1380 bool ignoreUnrecognized, JNIEnv* pEnv)
1381 {
1382 ScopedShutdown scopedShutdown;
1383
1384 assert(gDvm.initializing);
1385
1386 ALOGV("VM init args (%d):", argc);
1387 for (int i = 0; i < argc; i++) {
1388 ALOGV(" %d: '%s'", i, argv[i]);
1389 }
1390 setCommandLineDefaults();
1391
1392 /*
1393 * Process the option flags (if any).
1394 */
1395 int cc = processOptions(argc, argv, ignoreUnrecognized);
1396 if (cc != 0) {
1397 if (cc < 0) {
1398 dvmFprintf(stderr, "\n");
1399 usage("dalvikvm");
1400 }
1401 return "syntax error";
1402 }
1403
1404 #if WITH_EXTRA_GC_CHECKS > 1
1405 /* only "portable" interp has the extra goodies */
1406 if (gDvm.executionMode != kExecutionModeInterpPortable) {
1407 ALOGI("Switching to 'portable' interpreter for GC checks");
1408 gDvm.executionMode = kExecutionModeInterpPortable;
1409 }
1410 #endif
1411
1412 /* Configure group scheduling capabilities */
1413 if (!access("/dev/cpuctl/tasks", F_OK)) {
1414 ALOGV("Using kernel group scheduling");
1415 gDvm.kernelGroupScheduling = 1;
1416 } else {
1417 ALOGV("Using kernel scheduler policies");
1418 }
1419
1420 /* configure signal handling */
1421 if (!gDvm.reduceSignals)
1422 blockSignals();
1423
1424 /* verify system page size */
1425 if (sysconf(_SC_PAGESIZE) != SYSTEM_PAGE_SIZE) {
1426 return StringPrintf("expected page size %d, got %d",
1427 SYSTEM_PAGE_SIZE, (int) sysconf(_SC_PAGESIZE));
1428 }
1429
1430 /* mterp setup */
1431 ALOGV("Using executionMode %d", gDvm.executionMode);
1432 dvmCheckAsmConstants();
1433
1434 /*
1435 * Initialize components.
1436 */
1437 dvmQuasiAtomicsStartup();
1438 if (!dvmAllocTrackerStartup()) {
1439 return "dvmAllocTrackerStartup failed";
1440 }
1441 if (!dvmGcStartup()) {
1442 return "dvmGcStartup failed";
1443 }
1444 if (!dvmThreadStartup()) {
1445 return "dvmThreadStartup failed";
1446 }
1447 if (!dvmInlineNativeStartup()) {
1448 return "dvmInlineNativeStartup";
1449 }
1450 if (!dvmRegisterMapStartup()) {
1451 return "dvmRegisterMapStartup failed";
1452 }
1453 if (!dvmInstanceofStartup()) {
1454 return "dvmInstanceofStartup failed";
1455 }
1456 if (!dvmClassStartup()) {
1457 return "dvmClassStartup failed";
1458 }
1459
1460 /*
1461 * At this point, the system is guaranteed to be sufficiently
1462 * initialized that we can look up classes and class members. This
1463 * call populates the gDvm instance with all the class and member
1464 * references that the VM wants to use directly.
1465 */
1466 if (!dvmFindRequiredClassesAndMembers()) {
1467 return "dvmFindRequiredClassesAndMembers failed";
1468 }
1469
1470 if (!dvmStringInternStartup()) {
1471 return "dvmStringInternStartup failed";
1472 }
1473 if (!dvmNativeStartup()) {
1474 return "dvmNativeStartup failed";
1475 }
1476 if (!dvmInternalNativeStartup()) {
1477 return "dvmInternalNativeStartup failed";
1478 }
1479 if (!dvmJniStartup()) {
1480 return "dvmJniStartup failed";
1481 }
1482 if (!dvmProfilingStartup()) {
1483 return "dvmProfilingStartup failed";
1484 }
1485
1486 /*
1487 * Create a table of methods for which we will substitute an "inline"
1488 * version for performance.
1489 */
1490 if (!dvmCreateInlineSubsTable()) {
1491 return "dvmCreateInlineSubsTable failed";
1492 }
1493
1494 /*
1495 * Miscellaneous class library validation.
1496 */
1497 if (!dvmValidateBoxClasses()) {
1498 return "dvmValidateBoxClasses failed";
1499 }
1500
1501 /*
1502 * Do the last bits of Thread struct initialization we need to allow
1503 * JNI calls to work.
1504 */
1505 if (!dvmPrepMainForJni(pEnv)) {
1506 return "dvmPrepMainForJni failed";
1507 }
1508
1509 /*
1510 * Explicitly initialize java.lang.Class. This doesn't happen
1511 * automatically because it's allocated specially (it's an instance
1512 * of itself). Must happen before registration of system natives,
1513 * which make some calls that throw assertions if the classes they
1514 * operate on aren't initialized.
1515 */
1516 if (!dvmInitClass(gDvm.classJavaLangClass)) {
1517 return "couldn't initialized java.lang.Class";
1518 }
1519
1520 /*
1521 * Register the system native methods, which are registered through JNI.
1522 */
1523 if (!registerSystemNatives(pEnv)) {
1524 return "couldn't register system natives";
1525 }
1526
1527 /*
1528 * Do some "late" initialization for the memory allocator. This may
1529 * allocate storage and initialize classes.
1530 */
1531 if (!dvmCreateStockExceptions()) {
1532 return "dvmCreateStockExceptions failed";
1533 }
1534
1535 /*
1536 * At this point, the VM is in a pretty good state. Finish prep on
1537 * the main thread (specifically, create a java.lang.Thread object to go
1538 * along with our Thread struct). Note we will probably be executing
1539 * some interpreted class initializer code in here.
1540 */
1541 if (!dvmPrepMainThread()) {
1542 return "dvmPrepMainThread failed";
1543 }
1544
1545 /*
1546 * Make sure we haven't accumulated any tracked references. The main
1547 * thread should be starting with a clean slate.
1548 */
1549 if (dvmReferenceTableEntries(&dvmThreadSelf()->internalLocalRefTable) != 0)
1550 {
1551 ALOGW("Warning: tracked references remain post-initialization");
1552 dvmDumpReferenceTable(&dvmThreadSelf()->internalLocalRefTable, "MAIN");
1553 }
1554
1555 /* general debugging setup */
1556 if (!dvmDebuggerStartup()) {
1557 return "dvmDebuggerStartup failed";
1558 }
1559
1560 if (!dvmGcStartupClasses()) {
1561 return "dvmGcStartupClasses failed";
1562 }
1563
1564 /*
1565 * Init for either zygote mode or non-zygote mode. The key difference
1566 * is that we don't start any additional threads in Zygote mode.
1567 */
1568 if (gDvm.zygote) {
1569 if (!initZygote()) {
1570 return "initZygote failed";
1571 }
1572 } else {
1573 if (!dvmInitAfterZygote()) {
1574 return "dvmInitAfterZygote failed";
1575 }
1576 }
1577
1578
1579 #ifndef NDEBUG
1580 if (!dvmTestHash())
1581 ALOGE("dvmTestHash FAILED");
1582 if (false /*noisy!*/ && !dvmTestIndirectRefTable())
1583 ALOGE("dvmTestIndirectRefTable FAILED");
1584 #endif
1585
1586 if (dvmCheckException(dvmThreadSelf())) {
1587 dvmLogExceptionStackTrace();
1588 return "Exception pending at end of VM initialization";
1589 }
1590
1591 scopedShutdown.disarm();
1592 return "";
1593 }
1594
loadJniLibrary(const char * name)1595 static void loadJniLibrary(const char* name) {
1596 std::string mappedName(StringPrintf(OS_SHARED_LIB_FORMAT_STR, name));
1597 char* reason = NULL;
1598 if (!dvmLoadNativeCode(mappedName.c_str(), NULL, &reason)) {
1599 ALOGE("dvmLoadNativeCode failed for \"%s\": %s", name, reason);
1600 dvmAbort();
1601 }
1602 }
1603
1604 /*
1605 * Register java.* natives from our class libraries. We need to do
1606 * this after we're ready for JNI registration calls, but before we
1607 * do any class initialization.
1608 *
1609 * If we get this wrong, we will blow up in the ThreadGroup class init if
1610 * interpreted code makes any reference to System. It will likely do this
1611 * since it wants to do some java.io.File setup (e.g. for static in/out/err).
1612 *
1613 * We need to have gDvm.initializing raised here so that JNI FindClass
1614 * won't try to use the system/application class loader.
1615 */
registerSystemNatives(JNIEnv * pEnv)1616 static bool registerSystemNatives(JNIEnv* pEnv)
1617 {
1618 // Main thread is always first in list.
1619 Thread* self = gDvm.threadList;
1620
1621 // Must set this before allowing JNI-based method registration.
1622 self->status = THREAD_NATIVE;
1623
1624 // Most JNI libraries can just use System.loadLibrary, but you can't
1625 // if you're the library that implements System.loadLibrary!
1626 loadJniLibrary("javacore");
1627 loadJniLibrary("nativehelper");
1628
1629 // Back to run mode.
1630 self->status = THREAD_RUNNING;
1631
1632 return true;
1633 }
1634
1635 /*
1636 * Copied and modified slightly from system/core/toolbox/mount.c
1637 */
getMountsDevDir(const char * arg)1638 static std::string getMountsDevDir(const char *arg)
1639 {
1640 char mount_dev[256];
1641 char mount_dir[256];
1642 int match;
1643
1644 FILE *fp = fopen("/proc/self/mounts", "r");
1645 if (fp == NULL) {
1646 ALOGE("Could not open /proc/self/mounts: %s", strerror(errno));
1647 return "";
1648 }
1649
1650 while ((match = fscanf(fp, "%255s %255s %*s %*s %*d %*d\n", mount_dev, mount_dir)) != EOF) {
1651 mount_dev[255] = 0;
1652 mount_dir[255] = 0;
1653 if (match == 2 && (strcmp(arg, mount_dir) == 0)) {
1654 fclose(fp);
1655 return mount_dev;
1656 }
1657 }
1658
1659 fclose(fp);
1660 return "";
1661 }
1662
1663 /*
1664 * Do zygote-mode-only initialization.
1665 */
initZygote()1666 static bool initZygote()
1667 {
1668 /* zygote goes into its own process group */
1669 setpgid(0,0);
1670
1671 // See storage config details at http://source.android.com/tech/storage/
1672 // Create private mount namespace shared by all children
1673 if (unshare(CLONE_NEWNS) == -1) {
1674 SLOGE("Failed to unshare(): %s", strerror(errno));
1675 return -1;
1676 }
1677
1678 // Mark rootfs as being a slave so that changes from default
1679 // namespace only flow into our children.
1680 if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) {
1681 SLOGE("Failed to mount() rootfs as MS_SLAVE: %s", strerror(errno));
1682 return -1;
1683 }
1684
1685 // Create a staging tmpfs that is shared by our children; they will
1686 // bind mount storage into their respective private namespaces, which
1687 // are isolated from each other.
1688 const char* target_base = getenv("EMULATED_STORAGE_TARGET");
1689 if (target_base != NULL) {
1690 if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV,
1691 "uid=0,gid=1028,mode=0050") == -1) {
1692 SLOGE("Failed to mount tmpfs to %s: %s", target_base, strerror(errno));
1693 return -1;
1694 }
1695 }
1696
1697 // Mark /system as NOSUID | NODEV
1698 const char* android_root = getenv("ANDROID_ROOT");
1699
1700 if (android_root == NULL) {
1701 SLOGE("environment variable ANDROID_ROOT does not exist?!?!");
1702 return -1;
1703 }
1704
1705 std::string mountDev(getMountsDevDir(android_root));
1706 if (mountDev.empty()) {
1707 SLOGE("Unable to find mount point for %s", android_root);
1708 return -1;
1709 }
1710
1711 if (mount(mountDev.c_str(), android_root, "none",
1712 MS_REMOUNT | MS_NOSUID | MS_NODEV | MS_RDONLY | MS_BIND, NULL) == -1) {
1713 SLOGE("Remount of %s failed: %s", android_root, strerror(errno));
1714 return -1;
1715 }
1716
1717 #ifdef HAVE_ANDROID_OS
1718 if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) {
1719 if (errno == EINVAL) {
1720 SLOGW("PR_SET_NO_NEW_PRIVS failed. "
1721 "Is your kernel compiled correctly?: %s", strerror(errno));
1722 // Don't return -1 here, since it's expected that not all
1723 // kernels will support this option.
1724 } else {
1725 SLOGW("PR_SET_NO_NEW_PRIVS failed: %s", strerror(errno));
1726 return -1;
1727 }
1728 }
1729 #endif
1730
1731 return true;
1732 }
1733
1734 /*
1735 * Do non-zygote-mode initialization. This is done during VM init for
1736 * standard startup, or after a "zygote fork" when creating a new process.
1737 */
dvmInitAfterZygote()1738 bool dvmInitAfterZygote()
1739 {
1740 u8 startHeap, startQuit, startJdwp;
1741 u8 endHeap, endQuit, endJdwp;
1742
1743 startHeap = dvmGetRelativeTimeUsec();
1744
1745 /*
1746 * Post-zygote heap initialization, including starting
1747 * the HeapWorker thread.
1748 */
1749 if (!dvmGcStartupAfterZygote())
1750 return false;
1751
1752 endHeap = dvmGetRelativeTimeUsec();
1753 startQuit = dvmGetRelativeTimeUsec();
1754
1755 /* start signal catcher thread that dumps stacks on SIGQUIT */
1756 if (!gDvm.reduceSignals && !gDvm.noQuitHandler) {
1757 if (!dvmSignalCatcherStartup())
1758 return false;
1759 }
1760
1761 /* start stdout/stderr copier, if requested */
1762 if (gDvm.logStdio) {
1763 if (!dvmStdioConverterStartup())
1764 return false;
1765 }
1766
1767 endQuit = dvmGetRelativeTimeUsec();
1768 startJdwp = dvmGetRelativeTimeUsec();
1769
1770 /*
1771 * Start JDWP thread. If the command-line debugger flags specified
1772 * "suspend=y", this will pause the VM. We probably want this to
1773 * come last.
1774 */
1775 if (!initJdwp()) {
1776 ALOGD("JDWP init failed; continuing anyway");
1777 }
1778
1779 endJdwp = dvmGetRelativeTimeUsec();
1780
1781 ALOGV("thread-start heap=%d quit=%d jdwp=%d total=%d usec",
1782 (int)(endHeap-startHeap), (int)(endQuit-startQuit),
1783 (int)(endJdwp-startJdwp), (int)(endJdwp-startHeap));
1784
1785 #ifdef WITH_JIT
1786 if (gDvm.executionMode == kExecutionModeJit) {
1787 if (!dvmCompilerStartup())
1788 return false;
1789 }
1790 #endif
1791
1792 return true;
1793 }
1794
1795 /*
1796 * Prepare for a connection to a JDWP-compliant debugger.
1797 *
1798 * Note this needs to happen fairly late in the startup process, because
1799 * we need to have all of the java.* native methods registered (which in
1800 * turn requires JNI to be fully prepped).
1801 *
1802 * There are several ways to initialize:
1803 * server=n
1804 * We immediately try to connect to host:port. Bail on failure. On
1805 * success, send VM_START (suspending the VM if "suspend=y").
1806 * server=y suspend=n
1807 * Passively listen for a debugger to connect. Return immediately.
1808 * server=y suspend=y
1809 * Wait until debugger connects. Send VM_START ASAP, suspending the
1810 * VM after the message is sent.
1811 *
1812 * This gets more complicated with a nonzero value for "timeout".
1813 */
initJdwp()1814 static bool initJdwp()
1815 {
1816 assert(!gDvm.zygote);
1817
1818 /*
1819 * Init JDWP if the debugger is enabled. This may connect out to a
1820 * debugger, passively listen for a debugger, or block waiting for a
1821 * debugger.
1822 */
1823 if (gDvm.jdwpAllowed && gDvm.jdwpConfigured) {
1824 JdwpStartupParams params;
1825
1826 if (gDvm.jdwpHost != NULL) {
1827 if (strlen(gDvm.jdwpHost) >= sizeof(params.host)-1) {
1828 ALOGE("ERROR: hostname too long: '%s'", gDvm.jdwpHost);
1829 return false;
1830 }
1831 strcpy(params.host, gDvm.jdwpHost);
1832 } else {
1833 params.host[0] = '\0';
1834 }
1835 params.transport = gDvm.jdwpTransport;
1836 params.server = gDvm.jdwpServer;
1837 params.suspend = gDvm.jdwpSuspend;
1838 params.port = gDvm.jdwpPort;
1839
1840 gDvm.jdwpState = dvmJdwpStartup(¶ms);
1841 if (gDvm.jdwpState == NULL) {
1842 ALOGW("WARNING: debugger thread failed to initialize");
1843 /* TODO: ignore? fail? need to mimic "expected" behavior */
1844 }
1845 }
1846
1847 /*
1848 * If a debugger has already attached, send the "welcome" message. This
1849 * may cause us to suspend all threads.
1850 */
1851 if (dvmJdwpIsActive(gDvm.jdwpState)) {
1852 //dvmChangeStatus(NULL, THREAD_RUNNING);
1853 if (!dvmJdwpPostVMStart(gDvm.jdwpState, gDvm.jdwpSuspend)) {
1854 ALOGW("WARNING: failed to post 'start' message to debugger");
1855 /* keep going */
1856 }
1857 //dvmChangeStatus(NULL, THREAD_NATIVE);
1858 }
1859
1860 return true;
1861 }
1862
1863 /*
1864 * An alternative to JNI_CreateJavaVM/dvmStartup that does the first bit
1865 * of initialization and then returns with "initializing" still set. (Used
1866 * by DexOpt command-line utility.)
1867 *
1868 * Attempting to use JNI or internal natives will fail. It's best
1869 * if no bytecode gets executed, which means no <clinit>, which means
1870 * no exception-throwing. (In practice we need to initialize Class and
1871 * Object, and probably some exception classes.)
1872 *
1873 * Returns 0 on success.
1874 */
dvmPrepForDexOpt(const char * bootClassPath,DexOptimizerMode dexOptMode,DexClassVerifyMode verifyMode,int dexoptFlags)1875 int dvmPrepForDexOpt(const char* bootClassPath, DexOptimizerMode dexOptMode,
1876 DexClassVerifyMode verifyMode, int dexoptFlags)
1877 {
1878 gDvm.initializing = true;
1879 gDvm.optimizing = true;
1880
1881 /* configure signal handling */
1882 blockSignals();
1883
1884 /* set some defaults */
1885 setCommandLineDefaults();
1886 free(gDvm.bootClassPathStr);
1887 gDvm.bootClassPathStr = strdup(bootClassPath);
1888
1889 /* set opt/verify modes */
1890 gDvm.dexOptMode = dexOptMode;
1891 gDvm.classVerifyMode = verifyMode;
1892 gDvm.generateRegisterMaps = (dexoptFlags & DEXOPT_GEN_REGISTER_MAPS) != 0;
1893 if (dexoptFlags & DEXOPT_SMP) {
1894 assert((dexoptFlags & DEXOPT_UNIPROCESSOR) == 0);
1895 gDvm.dexOptForSmp = true;
1896 } else if (dexoptFlags & DEXOPT_UNIPROCESSOR) {
1897 gDvm.dexOptForSmp = false;
1898 } else {
1899 gDvm.dexOptForSmp = (ANDROID_SMP != 0);
1900 }
1901
1902 /*
1903 * Initialize the heap, some basic thread control mutexes, and
1904 * get the bootclasspath prepped.
1905 *
1906 * We can't load any classes yet because we may not yet have a source
1907 * for things like java.lang.Object and java.lang.Class.
1908 */
1909 if (!dvmGcStartup())
1910 goto fail;
1911 if (!dvmThreadStartup())
1912 goto fail;
1913 if (!dvmInlineNativeStartup())
1914 goto fail;
1915 if (!dvmRegisterMapStartup())
1916 goto fail;
1917 if (!dvmInstanceofStartup())
1918 goto fail;
1919 if (!dvmClassStartup())
1920 goto fail;
1921
1922 /*
1923 * We leave gDvm.initializing set to "true" so that, if we're not
1924 * able to process the "core" classes, we don't go into a death-spin
1925 * trying to throw a "class not found" exception.
1926 */
1927
1928 return 0;
1929
1930 fail:
1931 dvmShutdown();
1932 return 1;
1933 }
1934
1935
1936 /*
1937 * All threads have stopped. Finish the shutdown procedure.
1938 *
1939 * We can also be called if startup fails partway through, so be prepared
1940 * to deal with partially initialized data.
1941 *
1942 * Free any storage allocated in gGlobals.
1943 *
1944 * We can't dlclose() shared libs we've loaded, because it's possible a
1945 * thread not associated with the VM is running code in one.
1946 *
1947 * This is called from the JNI DestroyJavaVM function, which can be
1948 * called from any thread. (In practice, this will usually run in the
1949 * same thread that started the VM, a/k/a the main thread, but we don't
1950 * want to assume that.)
1951 */
dvmShutdown()1952 void dvmShutdown()
1953 {
1954 ALOGV("VM shutting down");
1955
1956 if (CALC_CACHE_STATS)
1957 dvmDumpAtomicCacheStats(gDvm.instanceofCache);
1958
1959 /*
1960 * Stop our internal threads.
1961 */
1962 dvmGcThreadShutdown();
1963
1964 if (gDvm.jdwpState != NULL)
1965 dvmJdwpShutdown(gDvm.jdwpState);
1966 free(gDvm.jdwpHost);
1967 gDvm.jdwpHost = NULL;
1968 free(gDvm.jniTrace);
1969 gDvm.jniTrace = NULL;
1970 free(gDvm.stackTraceFile);
1971 gDvm.stackTraceFile = NULL;
1972
1973 /* tell signal catcher to shut down if it was started */
1974 dvmSignalCatcherShutdown();
1975
1976 /* shut down stdout/stderr conversion */
1977 dvmStdioConverterShutdown();
1978
1979 #ifdef WITH_JIT
1980 if (gDvm.executionMode == kExecutionModeJit) {
1981 /* shut down the compiler thread */
1982 dvmCompilerShutdown();
1983 }
1984 #endif
1985
1986 /*
1987 * Kill any daemon threads that still exist. Actively-running threads
1988 * are likely to crash the process if they continue to execute while
1989 * the VM shuts down.
1990 */
1991 dvmSlayDaemons();
1992
1993 if (gDvm.verboseShutdown)
1994 ALOGD("VM cleaning up");
1995
1996 dvmDebuggerShutdown();
1997 dvmProfilingShutdown();
1998 dvmJniShutdown();
1999 dvmStringInternShutdown();
2000 dvmThreadShutdown();
2001 dvmClassShutdown();
2002 dvmRegisterMapShutdown();
2003 dvmInstanceofShutdown();
2004 dvmInlineNativeShutdown();
2005 dvmGcShutdown();
2006 dvmAllocTrackerShutdown();
2007
2008 /* these must happen AFTER dvmClassShutdown has walked through class data */
2009 dvmNativeShutdown();
2010 dvmInternalNativeShutdown();
2011
2012 dvmFreeInlineSubsTable();
2013
2014 free(gDvm.bootClassPathStr);
2015 free(gDvm.classPathStr);
2016 delete gDvm.properties;
2017
2018 freeAssertionCtrl();
2019
2020 dvmQuasiAtomicsShutdown();
2021
2022 /*
2023 * We want valgrind to report anything we forget to free as "definitely
2024 * lost". If there's a pointer in the global chunk, it would be reported
2025 * as "still reachable". Erasing the memory fixes this.
2026 *
2027 * This must be erased to zero if we want to restart the VM within this
2028 * process.
2029 */
2030 memset(&gDvm, 0xcd, sizeof(gDvm));
2031 }
2032
2033
2034 /*
2035 * fprintf() wrapper that calls through the JNI-specified vfprintf hook if
2036 * one was specified.
2037 */
dvmFprintf(FILE * fp,const char * format,...)2038 int dvmFprintf(FILE* fp, const char* format, ...)
2039 {
2040 va_list args;
2041 int result;
2042
2043 va_start(args, format);
2044 if (gDvm.vfprintfHook != NULL)
2045 result = (*gDvm.vfprintfHook)(fp, format, args);
2046 else
2047 result = vfprintf(fp, format, args);
2048 va_end(args);
2049
2050 return result;
2051 }
2052
2053 #ifdef __GLIBC__
2054 #include <execinfo.h>
2055 /*
2056 * glibc-only stack dump function. Requires link with "--export-dynamic".
2057 *
2058 * TODO: move this into libs/cutils and make it work for all platforms.
2059 */
dvmPrintNativeBackTrace()2060 void dvmPrintNativeBackTrace()
2061 {
2062 size_t MAX_STACK_FRAMES = 64;
2063 void* stackFrames[MAX_STACK_FRAMES];
2064 size_t frameCount = backtrace(stackFrames, MAX_STACK_FRAMES);
2065
2066 /*
2067 * TODO: in practice, we may find that we should use backtrace_symbols_fd
2068 * to avoid allocation, rather than use our own custom formatting.
2069 */
2070 char** strings = backtrace_symbols(stackFrames, frameCount);
2071 if (strings == NULL) {
2072 ALOGE("backtrace_symbols failed: %s", strerror(errno));
2073 return;
2074 }
2075
2076 size_t i;
2077 for (i = 0; i < frameCount; ++i) {
2078 ALOGW("#%-2d %s", i, strings[i]);
2079 }
2080 free(strings);
2081 }
2082 #else
dvmPrintNativeBackTrace()2083 void dvmPrintNativeBackTrace() {
2084 /* Hopefully, you're on an Android device and debuggerd will do this. */
2085 }
2086 #endif
2087
2088 /*
2089 * Abort the VM. We get here on fatal errors. Try very hard not to use
2090 * this; whenever possible, return an error to somebody responsible.
2091 */
dvmAbort()2092 void dvmAbort()
2093 {
2094 /*
2095 * Leave gDvm.lastMessage on the stack frame which can be decoded in the
2096 * tombstone file. This is for situations where we only have tombstone files
2097 * but no logs (ie b/5372634).
2098 *
2099 * For example, in the tombstone file you usually see this:
2100 *
2101 * #00 pc 00050ef2 /system/lib/libdvm.so (dvmAbort)
2102 * #01 pc 00077670 /system/lib/libdvm.so (_Z15dvmClassStartupv)
2103 * :
2104 *
2105 * stack:
2106 * :
2107 * #00 beed2658 00000000
2108 * beed265c 7379732f
2109 * beed2660 2f6d6574
2110 * beed2664 6d617266
2111 * beed2668 726f7765
2112 * beed266c 6f632f6b
2113 * beed2670 6a2e6572
2114 * beed2674 00007261
2115 * beed2678 00000000
2116 *
2117 * The ascii values between beed265c and beed2674 belongs to messageBuffer
2118 * and it can be decoded as "/system/framework/core.jar".
2119 */
2120 const int messageLength = 512;
2121 char messageBuffer[messageLength] = {0};
2122 int result = 0;
2123
2124 snprintf(messageBuffer, messageLength, "%s", gDvm.lastMessage);
2125
2126 /* So that messageBuffer[] looks like useful stuff to the compiler */
2127 for (int i = 0; i < messageLength && messageBuffer[i]; i++) {
2128 result += messageBuffer[i];
2129 }
2130
2131 ALOGE("VM aborting");
2132
2133 fflush(NULL); // flush all open file buffers
2134
2135 /* JNI-supplied abort hook gets right of first refusal */
2136 if (gDvm.abortHook != NULL)
2137 (*gDvm.abortHook)();
2138
2139 /*
2140 * On the device, debuggerd will give us a stack trace.
2141 * On the host, we have to help ourselves.
2142 */
2143 dvmPrintNativeBackTrace();
2144
2145 /*
2146 * If we call abort(), all threads in the process receives a SIBABRT.
2147 * debuggerd dumps the stack trace of the main thread, whether or not
2148 * that was the thread that failed.
2149 *
2150 * By stuffing a value into a bogus address, we cause a segmentation
2151 * fault in the current thread, and get a useful log from debuggerd.
2152 * We can also trivially tell the difference between a VM crash and
2153 * a deliberate abort by looking at the fault address.
2154 */
2155 *((char*)0xdeadd00d) = result;
2156 abort();
2157
2158 /* notreached */
2159 }
2160